#ifndef WUFFS_INCLUDE_GUARD
#define WUFFS_INCLUDE_GUARD

// Wuffs ships as a "single file C library" or "header file library" as per
// https://github.com/nothings/stb/blob/master/docs/stb_howto.txt
//
// To use that single file as a "foo.c"-like implementation, instead of a
// "foo.h"-like header, #define WUFFS_IMPLEMENTATION before #include'ing or
// compiling it.

// Wuffs' C code is generated automatically, not hand-written. These warnings'
// costs outweigh the benefits.
//
// The "elif defined(__clang__)" isn't redundant. While vanilla clang defines
// __GNUC__, clang-cl (which mimics MSVC's cl.exe) does not.
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#pragma GCC diagnostic ignored "-Wunreachable-code"
#pragma GCC diagnostic ignored "-Wunused-function"
#pragma GCC diagnostic ignored "-Wunused-parameter"
#if defined(__cplusplus)
#pragma GCC diagnostic ignored "-Wold-style-cast"
#endif
#elif defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wimplicit-fallthrough"
#pragma clang diagnostic ignored "-Wmissing-field-initializers"
#pragma clang diagnostic ignored "-Wunreachable-code"
#pragma clang diagnostic ignored "-Wunused-function"
#pragma clang diagnostic ignored "-Wunused-parameter"
#if defined(__cplusplus)
#pragma clang diagnostic ignored "-Wold-style-cast"
#endif
#endif

// Copyright 2017 The Wuffs Authors.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//
// SPDX-License-Identifier: Apache-2.0 OR MIT

#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

#ifdef __cplusplus
#if (__cplusplus >= 201103L) || defined(_MSC_VER)
#include <memory>
#define WUFFS_BASE__HAVE_EQ_DELETE
#define WUFFS_BASE__HAVE_UNIQUE_PTR
// The "defined(__clang__)" isn't redundant. While vanilla clang defines
// __GNUC__, clang-cl (which mimics MSVC's cl.exe) does not.
#elif defined(__GNUC__) || defined(__clang__)
#warning "Wuffs' C++ code expects -std=c++11 or later"
#endif

extern "C" {
#endif

// ---------------- Version

// WUFFS_VERSION is the major.minor.patch version, as per https://semver.org/,
// as a uint64_t. The major number is the high 32 bits. The minor number is the
// middle 16 bits. The patch number is the low 16 bits. The pre-release label
// and build metadata are part of the string representation (such as
// "1.2.3-beta+456.20181231") but not the uint64_t representation.
//
// WUFFS_VERSION_PRE_RELEASE_LABEL (such as "", "beta" or "rc.1") being
// non-empty denotes a developer preview, not a release version, and has no
// backwards or forwards compatibility guarantees.
//
// WUFFS_VERSION_BUILD_METADATA_XXX, if non-zero, are the number of commits and
// the last commit date in the repository used to build this library. Within
// each major.minor branch, the commit count should increase monotonically.
//
// ¡ Some code generation programs can override WUFFS_VERSION.
#define WUFFS_VERSION 0
#define WUFFS_VERSION_MAJOR 0
#define WUFFS_VERSION_MINOR 0
#define WUFFS_VERSION_PATCH 0
#define WUFFS_VERSION_PRE_RELEASE_LABEL "unsupported.snapshot"
#define WUFFS_VERSION_BUILD_METADATA_COMMIT_COUNT 0
#define WUFFS_VERSION_BUILD_METADATA_COMMIT_DATE 0
#define WUFFS_VERSION_STRING "0.0.0+0.00000000"

// ---------------- Private Implementation Macros Re-definition Check

// Users (those who #include the "wuffs-vM.N.c" file) should not define any
// WUFFS_PRIVATE_IMPL__ETC macros, only WUFFS_CONFIG__ETC macros (and
// WUFFS_IMPLEMENTATION). Mucking about with the private implementation macros
// is not supported and may break when upgrading to newer Wuffs versions.

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_CRC32) ||       \
    defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON) ||        \
    defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64) ||          \
    defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2) ||       \
    defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3) ||       \
    defined(WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE) || \
    defined(WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION) ||     \
    defined(WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL) ||      \
    defined(WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U16) ||        \
    defined(WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32) ||        \
    defined(WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U64) ||        \
    defined(WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U8)

#if defined(__GNUC__) || defined(__clang__)
#warning "Defining WUFFS_PRIVATE_IMPL__ETC yourself is not supported"
#elif defined(_MSC_VER)
#pragma message("Defining WUFFS_PRIVATE_IMPL__ETC yourself is not supported")
#endif

#endif

// ---------------- Obsolete Macros Check

// std/tga was renamed to std/targa in September 2024 (Wuffs v0.4 alpha).
#if defined(WUFFS_CONFIG__MODULE__TGA)

#if defined(__GNUC__) || defined(__clang__)
#warning "WUFFS_CONFIG__MODULE__TGA was renamed to WUFFS_CONFIG__MODULE__TARGA"
#elif defined(_MSC_VER)
#pragma message( \
    "WUFFS_CONFIG__MODULE__TGA was renamed to WUFFS_CONFIG__MODULE__TARGA")
#endif

#endif

// ---------------- Configuration

// Define WUFFS_CONFIG__AVOID_CPU_ARCH to avoid any code tied to a specific CPU
// architecture, such as SSE SIMD for the x86 CPU family.
#if defined(WUFFS_CONFIG__AVOID_CPU_ARCH)  // (#if-chain ref AVOID_CPU_ARCH_0)
// No-op.
#else  // (#if-chain ref AVOID_CPU_ARCH_0)

// The "defined(__clang__)" isn't redundant. While vanilla clang defines
// __GNUC__, clang-cl (which mimics MSVC's cl.exe) does not.
#if defined(__GNUC__) || defined(__clang__)
#define WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET(arg) __attribute__((target(arg)))
#else
#define WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET(arg)
#endif  // defined(__GNUC__) || defined(__clang__)

#if defined(__GNUC__)  // (#if-chain ref AVOID_CPU_ARCH_1)

// To simplify Wuffs code, "cpu_arch >= arm_xxx" requires xxx but also
// unaligned little-endian load/stores.
#if defined(__ARM_FEATURE_UNALIGNED) && !defined(__native_client__) && \
    defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
// Not all gcc versions define __ARM_ACLE, even if they support crc32
// intrinsics. Look for __ARM_FEATURE_CRC32 instead.
#if defined(__ARM_FEATURE_CRC32)
#include <arm_acle.h>
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_CRC32
#endif  // defined(__ARM_FEATURE_CRC32)
#if defined(__ARM_NEON)
#include <arm_neon.h>
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON
#endif  // defined(__ARM_NEON)
#endif  // defined(__ARM_FEATURE_UNALIGNED) etc

// Similarly, "cpu_arch >= x86_sse42" requires SSE4.2 but also PCLMUL and
// POPCNT. This is checked at runtime via cpuid, not at compile time.
//
// Likewise, "cpu_arch >= x86_avx2" also requires PCLMUL, POPCNT and SSE4.2.
//
// ----
//
// Technically, we could use the SSE family on 32-bit x86, not just 64-bit x86.
// But some intrinsics don't compile in 32-bit mode. It's not worth the hassle.
// https://github.com/google/wuffs/issues/145
#if defined(__x86_64__)
#if !defined(__native_client__)
#include <cpuid.h>
#include <x86intrin.h>
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3
#endif  // !defined(__native_client__)
#endif  // defined(__x86_64__)

#elif defined(_MSC_VER)  // (#if-chain ref AVOID_CPU_ARCH_1)

#if defined(_M_X64)

// On X86_64, Microsoft Visual C/C++ (MSVC) only supports SSE2 by default.
// There are /arch:SSE2, /arch:AVX and /arch:AVX2 compiler flags (the AVX2 one
// is roughly equivalent to X86_64_V3), but there is no /arch:SSE42 compiler
// flag that's equivalent to X86_64_V2.
//
// For getting maximum performance with X86_64 MSVC and Wuffs, pass /arch:AVX2
// (and then test on the oldest hardware you intend to support).
//
// Absent that compiler flag, either define one of the three macros listed
// below or else the X86_64 SIMD code will be disabled and you'll get a #pragma
// message stating this library "performs best with /arch:AVX2". This message
// is harmless and ignorable, in that the non-SIMD code is still correct and
// reasonably performant, but is a reminder that when combining Wuffs and MSVC,
// some compiler configuration is required for maximum performance.
//
//  - WUFFS_CONFIG__DISABLE_MSVC_CPU_ARCH__X86_64_FAMILY
//  - WUFFS_CONFIG__ENABLE_MSVC_CPU_ARCH__X86_64_V2 (enables SSE4.2 and below)
//  - WUFFS_CONFIG__ENABLE_MSVC_CPU_ARCH__X86_64_V3 (enables AVX2 and below)
//
// Defining the first one (WUFFS_CONFIG__DISABLE_MSVC_CPU_ARCH__X86_64_FAMILY)
// or defining none of those three (the default state) are equivalent (in that
// both disable the SIMD code paths), other than that pragma message.
//
// When defining these WUFFS_CONFIG__ENABLE_ETC macros with MSVC, be aware that
// some users report it leading to ICEs (Internal Compiler Errors), but other
// users report no problems at all (and improved performance). It's unclear
// exactly what combination of SIMD code and MSVC configuration lead to ICEs.
// Do your own testing with your own MSVC version and configuration.
//
// https://github.com/google/wuffs/issues/148
// https://github.com/google/wuffs/issues/151
// https://developercommunity.visualstudio.com/t/fatal--error-C1001:-Internal-compiler-er/10703305
//
// Clang (including clang-cl) and GCC don't need this WUFFS_CONFIG__ETC macro
// machinery, or having the Wuffs-the-library user to fiddle with compiler
// flags, because they support "__attribute__((target(arg)))".
#if defined(__AVX2__) || defined(__clang__) || \
    defined(WUFFS_CONFIG__ENABLE_MSVC_CPU_ARCH__X86_64_V3)
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3
#elif defined(WUFFS_CONFIG__ENABLE_MSVC_CPU_ARCH__X86_64_V2)
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64
#define WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2
#elif !defined(WUFFS_CONFIG__DISABLE_MSVC_CPU_ARCH__X86_64_FAMILY)
#pragma message("Wuffs with MSVC+X64 performs best with /arch:AVX2")
#endif  // defined(__AVX2__) || defined(__clang__) || etc

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64)

#if defined(WUFFS_CONFIG__DISABLE_MSVC_CPU_ARCH__X86_64_FAMILY)
#error "MSVC_CPU_ARCH simultaneously enabled and disabled"
#endif

#include <intrin.h>
// intrin.h isn't enough for X64 SIMD, with clang-cl, if we want to use
// "__attribute__((target(arg)))" without e.g. "/arch:AVX".
//
// Some web pages suggest that <immintrin.h> is all you need, as it pulls in
// the earlier SIMD families like SSE4.2, but that doesn't seem to work in
// practice, possibly for the same reason that just <intrin.h> doesn't work.
#include <immintrin.h>  // AVX, AVX2, FMA, POPCNT
#include <nmmintrin.h>  // SSE4.2
#include <wmmintrin.h>  // AES, PCLMUL

#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64)
#endif  // defined(_M_X64)
#endif  // (#if-chain ref AVOID_CPU_ARCH_1)
#endif  // (#if-chain ref AVOID_CPU_ARCH_0)

// --------

// Define WUFFS_CONFIG__STATIC_FUNCTIONS (combined with WUFFS_IMPLEMENTATION)
// to make all of Wuffs' functions have static storage.
//
// This can help the compiler ignore or discard unused code, which can produce
// faster compiles and smaller binaries. Other motivations are discussed in the
// "ALLOW STATIC IMPLEMENTATION" section of
// https://raw.githubusercontent.com/nothings/stb/master/docs/stb_howto.txt
#if defined(WUFFS_CONFIG__STATIC_FUNCTIONS)
#define WUFFS_BASE__MAYBE_STATIC static
#else
#define WUFFS_BASE__MAYBE_STATIC
#endif  // defined(WUFFS_CONFIG__STATIC_FUNCTIONS)

// ---------------- CPU Architecture

static inline bool  //
wuffs_base__cpu_arch__have_arm_crc32(void) {
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_CRC32)
  return true;
#else
  return false;
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_CRC32)
}

static inline bool  //
wuffs_base__cpu_arch__have_arm_neon(void) {
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
  return true;
#else
  return false;
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
}

static inline bool  //
wuffs_base__cpu_arch__have_x86_avx2(void) {
#if defined(__PCLMUL__) && defined(__POPCNT__) && defined(__SSE4_2__) && \
    defined(__AVX2__)
  return true;
#else
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64)
  // GCC defines these macros but MSVC does not.
  //  - bit_AVX2 = (1 <<  5)
  const unsigned int avx2_ebx7 = 0x00000020;
  // GCC defines these macros but MSVC does not.
  //  - bit_PCLMUL = (1 <<  1)
  //  - bit_POPCNT = (1 << 23)
  //  - bit_SSE4_2 = (1 << 20)
  const unsigned int avx2_ecx1 = 0x00900002;

  // clang defines __GNUC__ and clang-cl defines _MSC_VER (but not __GNUC__).
#if defined(__GNUC__)
  unsigned int eax7 = 0;
  unsigned int ebx7 = 0;
  unsigned int ecx7 = 0;
  unsigned int edx7 = 0;
  if (__get_cpuid_count(7, 0, &eax7, &ebx7, &ecx7, &edx7) &&
      ((ebx7 & avx2_ebx7) == avx2_ebx7)) {
    unsigned int eax1 = 0;
    unsigned int ebx1 = 0;
    unsigned int ecx1 = 0;
    unsigned int edx1 = 0;
    if (__get_cpuid(1, &eax1, &ebx1, &ecx1, &edx1) &&
        ((ecx1 & avx2_ecx1) == avx2_ecx1)) {
      return true;
    }
  }
#elif defined(_MSC_VER)  // defined(__GNUC__)
  int x7[4];
  __cpuidex(x7, 7, 0);
  if ((((unsigned int)(x7[1])) & avx2_ebx7) == avx2_ebx7) {
    int x1[4];
    __cpuid(x1, 1);
    if ((((unsigned int)(x1[2])) & avx2_ecx1) == avx2_ecx1) {
      return true;
    }
  }
#else
#error "WUFFS_PRIVATE_IMPL__CPU_ARCH__ETC combined with an unsupported compiler"
#endif  // defined(__GNUC__); defined(_MSC_VER)
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64)
  return false;
#endif  // defined(__PCLMUL__) && defined(__POPCNT__) && defined(__SSE4_2__) &&
        // defined(__AVX2__)
}

static inline bool  //
wuffs_base__cpu_arch__have_x86_bmi2(void) {
#if defined(__BMI2__)
  return true;
#else
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64)
  // GCC defines these macros but MSVC does not.
  //  - bit_BMI2 = (1 <<  8)
  const unsigned int bmi2_ebx7 = 0x00000100;

  // clang defines __GNUC__ and clang-cl defines _MSC_VER (but not __GNUC__).
#if defined(__GNUC__)
  unsigned int eax7 = 0;
  unsigned int ebx7 = 0;
  unsigned int ecx7 = 0;
  unsigned int edx7 = 0;
  if (__get_cpuid_count(7, 0, &eax7, &ebx7, &ecx7, &edx7) &&
      ((ebx7 & bmi2_ebx7) == bmi2_ebx7)) {
    return true;
  }
#elif defined(_MSC_VER)  // defined(__GNUC__)
  int x7[4];
  __cpuidex(x7, 7, 0);
  if ((((unsigned int)(x7[1])) & bmi2_ebx7) == bmi2_ebx7) {
    return true;
  }
#else
#error "WUFFS_PRIVATE_IMPL__CPU_ARCH__ETC combined with an unsupported compiler"
#endif  // defined(__GNUC__); defined(_MSC_VER)
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64)
  return false;
#endif  // defined(__BMI2__)
}

static inline bool  //
wuffs_base__cpu_arch__have_x86_sse42(void) {
#if defined(__PCLMUL__) && defined(__POPCNT__) && defined(__SSE4_2__)
  return true;
#else
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64)
  // GCC defines these macros but MSVC does not.
  //  - bit_PCLMUL = (1 <<  1)
  //  - bit_POPCNT = (1 << 23)
  //  - bit_SSE4_2 = (1 << 20)
  const unsigned int sse42_ecx1 = 0x00900002;

  // clang defines __GNUC__ and clang-cl defines _MSC_VER (but not __GNUC__).
#if defined(__GNUC__)
  unsigned int eax1 = 0;
  unsigned int ebx1 = 0;
  unsigned int ecx1 = 0;
  unsigned int edx1 = 0;
  if (__get_cpuid(1, &eax1, &ebx1, &ecx1, &edx1) &&
      ((ecx1 & sse42_ecx1) == sse42_ecx1)) {
    return true;
  }
#elif defined(_MSC_VER)  // defined(__GNUC__)
  int x1[4];
  __cpuid(x1, 1);
  if ((((unsigned int)(x1[2])) & sse42_ecx1) == sse42_ecx1) {
    return true;
  }
#else
#error "WUFFS_PRIVATE_IMPL__CPU_ARCH__ETC combined with an unsupported compiler"
#endif  // defined(__GNUC__); defined(_MSC_VER)
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64)
  return false;
#endif  // defined(__PCLMUL__) && defined(__POPCNT__) && defined(__SSE4_2__)
}

// ---------------- Fundamentals

// Wuffs assumes that:
//  - converting a uint32_t to a size_t will never overflow.
//  - converting a size_t to a uint64_t will never overflow.
#if defined(__WORDSIZE)
#if (__WORDSIZE != 32) && (__WORDSIZE != 64)
#error "Wuffs requires a word size of either 32 or 64 bits"
#endif
#endif

// The "defined(__clang__)" isn't redundant. While vanilla clang defines
// __GNUC__, clang-cl (which mimics MSVC's cl.exe) does not.
#if defined(__GNUC__) || defined(__clang__)
#define WUFFS_BASE__FORCE_INLINE __attribute__((__always_inline__))
#define WUFFS_BASE__POTENTIALLY_UNUSED __attribute__((unused))
#define WUFFS_BASE__WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#elif defined(_MSC_VER)
#define WUFFS_BASE__FORCE_INLINE __forceinline
#define WUFFS_BASE__POTENTIALLY_UNUSED
#define WUFFS_BASE__WARN_UNUSED_RESULT
#else
#define WUFFS_BASE__FORCE_INLINE
#define WUFFS_BASE__POTENTIALLY_UNUSED
#define WUFFS_BASE__WARN_UNUSED_RESULT
#endif

// Clang's "-fsanitize=integer" checks for "unsigned-integer-overflow" even
// though, for *unsigned* integers, it is *not* undefined behavior. The check
// is still made because unsigned integer overflow "is often unintentional".
// https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html
//
// However, for Wuffs' generated C code, unsigned overflow is intentional. The
// programmer has to use "~mod+" instead of a plain "+" operator in Wuffs code.
// Further runtime checks for unsigned integer overflow can add performance
// overhead (fuzzers can then time out) and can raise false negatives, without
// generating much benefits. We disable the "unsigned-integer-overflow" check.
#if defined(__has_feature)
#if __has_feature(undefined_behavior_sanitizer)
#define WUFFS_BASE__GENERATED_C_CODE \
  __attribute__((no_sanitize("unsigned-integer-overflow")))
#endif
#endif
#if !defined(WUFFS_BASE__GENERATED_C_CODE)
#define WUFFS_BASE__GENERATED_C_CODE
#endif

// --------

// Options (bitwise or'ed together) for wuffs_foo__bar__initialize functions.

#define WUFFS_INITIALIZE__DEFAULT_OPTIONS ((uint32_t)0x00000000)

// WUFFS_INITIALIZE__ALREADY_ZEROED means that the "self" receiver struct value
// has already been set to all zeroes.
#define WUFFS_INITIALIZE__ALREADY_ZEROED ((uint32_t)0x00000001)

// WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED means that, absent
// WUFFS_INITIALIZE__ALREADY_ZEROED, only some of the "self" receiver struct
// value will be set to all zeroes. Internal buffers, which tend to be a large
// proportion of the struct's size, will be left uninitialized. Internal means
// that the buffer is contained by the receiver struct, as opposed to being
// passed as a separately allocated "work buffer".
//
// For more detail, see:
// https://github.com/google/wuffs/blob/main/doc/note/initialization.md
#define WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED \
  ((uint32_t)0x00000002)

// --------

#ifdef __cplusplus
// Wuffs structs are just data, not resources (in the RAII sense). They don't
// subclass anything. They don't have virtual destructors. They don't contain
// pointers to dynamically allocated memory. They don't contain file
// descriptors. And so on. Destroying such a struct (e.g. via a
// wuffs_foo__bar::unique_ptr) can just call free, especially as
// sizeof(wuffs_foo__bar) isn't supposed to be part of the public (stable) API.
struct wuffs_unique_ptr_deleter {
  void operator()(void* p) { free(p); }
};
#endif  // __cplusplus

// --------

#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-qual"
#endif

static inline uint8_t*  //
wuffs_base__strip_const_from_u8_ptr(const uint8_t* ptr) {
  return (uint8_t*)ptr;
}

static inline uint16_t*  //
wuffs_base__strip_const_from_u16_ptr(const uint16_t* ptr) {
  return (uint16_t*)ptr;
}

static inline uint32_t*  //
wuffs_base__strip_const_from_u32_ptr(const uint32_t* ptr) {
  return (uint32_t*)ptr;
}

static inline uint64_t*  //
wuffs_base__strip_const_from_u64_ptr(const uint64_t* ptr) {
  return (uint64_t*)ptr;
}

#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif

// --------

// wuffs_base__empty_struct is used when a Wuffs function returns an empty
// struct. In C, if a function f returns void, you can't say "x = f()", but in
// Wuffs, if a function g returns empty, you can say "y = g()".
typedef struct wuffs_base__empty_struct__struct {
  // private_impl is a placeholder field. It isn't explicitly used, except that
  // without it, the sizeof a struct with no fields can differ across C/C++
  // compilers, and it is undefined behavior in C99. For example, gcc says that
  // the sizeof an empty struct is 0, and g++ says that it is 1. This leads to
  // ABI incompatibility if a Wuffs .c file is processed by one compiler and
  // its .h file with another compiler.
  //
  // Instead, we explicitly insert an otherwise unused field, so that the
  // sizeof this struct is always 1.
  uint8_t private_impl;
} wuffs_base__empty_struct;

static inline wuffs_base__empty_struct  //
wuffs_base__make_empty_struct(void) {
  wuffs_base__empty_struct ret;
  ret.private_impl = 0;
  return ret;
}

// wuffs_base__utility is a placeholder receiver type. It enables what Java
// calls static methods, as opposed to regular methods.
typedef struct wuffs_base__utility__struct {
  // private_impl is a placeholder field. It isn't explicitly used, except that
  // without it, the sizeof a struct with no fields can differ across C/C++
  // compilers, and it is undefined behavior in C99. For example, gcc says that
  // the sizeof an empty struct is 0, and g++ says that it is 1. This leads to
  // ABI incompatibility if a Wuffs .c file is processed by one compiler and
  // its .h file with another compiler.
  //
  // Instead, we explicitly insert an otherwise unused field, so that the
  // sizeof this struct is always 1.
  uint8_t private_impl;
} wuffs_base__utility;

typedef struct wuffs_base__vtable__struct {
  const char* vtable_name;
  const void* function_pointers;
} wuffs_base__vtable;

// --------

// See https://github.com/google/wuffs/blob/main/doc/note/statuses.md
typedef struct wuffs_base__status__struct {
  const char* repr;

#ifdef __cplusplus
  inline bool is_complete() const;
  inline bool is_error() const;
  inline bool is_note() const;
  inline bool is_ok() const;
  inline bool is_suspension() const;
  inline bool is_truncated_input_error() const;
  inline const char* message() const;
#endif  // __cplusplus

} wuffs_base__status;

extern const char wuffs_base__note__i_o_redirect[];
extern const char wuffs_base__note__end_of_data[];
extern const char wuffs_base__note__metadata_reported[];
extern const char wuffs_base__suspension__even_more_information[];
extern const char wuffs_base__suspension__mispositioned_read[];
extern const char wuffs_base__suspension__mispositioned_write[];
extern const char wuffs_base__suspension__short_read[];
extern const char wuffs_base__suspension__short_workbuf[];
extern const char wuffs_base__suspension__short_write[];
extern const char wuffs_base__error__bad_i_o_position[];
extern const char wuffs_base__error__bad_argument_length_too_short[];
extern const char wuffs_base__error__bad_argument[];
extern const char wuffs_base__error__bad_call_sequence[];
extern const char wuffs_base__error__bad_data[];
extern const char wuffs_base__error__bad_receiver[];
extern const char wuffs_base__error__bad_restart[];
extern const char wuffs_base__error__bad_sizeof_receiver[];
extern const char wuffs_base__error__bad_vtable[];
extern const char wuffs_base__error__bad_workbuf_length[];
extern const char wuffs_base__error__bad_wuffs_version[];
extern const char wuffs_base__error__cannot_return_a_suspension[];
extern const char wuffs_base__error__disabled_by_wuffs_config_dst_pixel_format_enable_allowlist[];
extern const char wuffs_base__error__disabled_by_previous_error[];
extern const char wuffs_base__error__initialize_falsely_claimed_already_zeroed[];
extern const char wuffs_base__error__initialize_not_called[];
extern const char wuffs_base__error__insufficient_history[];
extern const char wuffs_base__error__interleaved_coroutine_calls[];
extern const char wuffs_base__error__no_more_information[];
extern const char wuffs_base__error__not_enough_data[];
extern const char wuffs_base__error__out_of_bounds[];
extern const char wuffs_base__error__unsupported_image_dimension[];
extern const char wuffs_base__error__unsupported_method[];
extern const char wuffs_base__error__unsupported_option[];
extern const char wuffs_base__error__unsupported_pixel_swizzler_option[];
extern const char wuffs_base__error__too_much_data[];

static inline wuffs_base__status  //
wuffs_base__make_status(const char* repr) {
  wuffs_base__status z;
  z.repr = repr;
  return z;
}

static inline bool  //
wuffs_base__status__is_complete(const wuffs_base__status* z) {
  return (z->repr == NULL) || ((*z->repr != '$') && (*z->repr != '#'));
}

static inline bool  //
wuffs_base__status__is_error(const wuffs_base__status* z) {
  return z->repr && (*z->repr == '#');
}

static inline bool  //
wuffs_base__status__is_note(const wuffs_base__status* z) {
  return z->repr && (*z->repr != '$') && (*z->repr != '#');
}

static inline bool  //
wuffs_base__status__is_ok(const wuffs_base__status* z) {
  return z->repr == NULL;
}

static inline bool  //
wuffs_base__status__is_suspension(const wuffs_base__status* z) {
  return z->repr && (*z->repr == '$');
}

static inline bool  //
wuffs_base__status__is_truncated_input_error(const wuffs_base__status* z) {
  const char* p = z->repr;
  if (!p || (*p != '#')) {
    return false;
  }
  p++;
  while (1) {
    if (*p == 0) {
      return false;
    } else if (*p++ == ':') {
      break;
    }
  }
  return strcmp(p, " truncated input") == 0;
}

// wuffs_base__status__message strips the leading '$', '#' or '@'.
static inline const char*  //
wuffs_base__status__message(const wuffs_base__status* z) {
  if (z->repr) {
    if ((*z->repr == '$') || (*z->repr == '#') || (*z->repr == '@')) {
      return z->repr + 1;
    }
  }
  return z->repr;
}

#ifdef __cplusplus

inline bool  //
wuffs_base__status::is_complete() const {
  return wuffs_base__status__is_complete(this);
}

inline bool  //
wuffs_base__status::is_error() const {
  return wuffs_base__status__is_error(this);
}

inline bool  //
wuffs_base__status::is_note() const {
  return wuffs_base__status__is_note(this);
}

inline bool  //
wuffs_base__status::is_ok() const {
  return wuffs_base__status__is_ok(this);
}

inline bool  //
wuffs_base__status::is_suspension() const {
  return wuffs_base__status__is_suspension(this);
}

inline bool  //
wuffs_base__status::is_truncated_input_error() const {
  return wuffs_base__status__is_truncated_input_error(this);
}

inline const char*  //
wuffs_base__status::message() const {
  return wuffs_base__status__message(this);
}

#endif  // __cplusplus

// --------

// WUFFS_BASE__RESULT is a result type: either a status (an error) or a value.
//
// A result with all fields NULL or zero is as valid as a zero-valued T.
#define WUFFS_BASE__RESULT(T)  \
  struct {                     \
    wuffs_base__status status; \
    T value;                   \
  }

typedef WUFFS_BASE__RESULT(double) wuffs_base__result_f64;
typedef WUFFS_BASE__RESULT(int64_t) wuffs_base__result_i64;
typedef WUFFS_BASE__RESULT(uint64_t) wuffs_base__result_u64;

// --------

// wuffs_base__transform__output is the result of transforming from a src slice
// to a dst slice.
typedef struct wuffs_base__transform__output__struct {
  wuffs_base__status status;
  size_t num_dst;
  size_t num_src;
} wuffs_base__transform__output;

// --------

// FourCC constants. Four Character Codes are literally four ASCII characters
// (sometimes padded with ' ' spaces) that pack neatly into a signed or
// unsigned 32-bit integer. ASCII letters are conventionally upper case.
//
// They are often used to identify video codecs (e.g. "H265") and pixel formats
// (e.g. "YV12"). Wuffs uses them for that but also generally for naming
// various things: compression formats (e.g. "BZ2 "), image metadata (e.g.
// "EXIF"), file formats (e.g. "HTML"), etc.
//
// Wuffs' u32 values are big-endian ("JPEG" is 0x4A504547 not 0x4745504A) to
// preserve ordering: "JPEG" < "MP3 " and 0x4A504547 < 0x4D503320.

// Android Binary XML (for resources; see AndroidBinXmlParser.java).
#define WUFFS_BASE__FOURCC__ABXR 0x41425852

// Android Binary XML (for system_server; see BinaryXmlSerializer.java).
#define WUFFS_BASE__FOURCC__ABXS 0x41425853

// Background Color.
#define WUFFS_BASE__FOURCC__BGCL 0x4247434C

// Bitmap.
#define WUFFS_BASE__FOURCC__BMP 0x424D5020

// Brotli.
#define WUFFS_BASE__FOURCC__BRTL 0x4252544C

// Bzip2.
#define WUFFS_BASE__FOURCC__BZ2 0x425A3220

// Concise Binary Object Representation.
#define WUFFS_BASE__FOURCC__CBOR 0x43424F52

// Primary Chromaticities and White Point.
#define WUFFS_BASE__FOURCC__CHRM 0x4348524D

// Cascading Style Sheets.
#define WUFFS_BASE__FOURCC__CSS 0x43535320

// Encapsulated PostScript.
#define WUFFS_BASE__FOURCC__EPS 0x45505320

// Ericsson Texture Compression 2 (iPACKMAN).
#define WUFFS_BASE__FOURCC__ETC2 0x45544332

// Exchangeable Image File Format.
#define WUFFS_BASE__FOURCC__EXIF 0x45584946

// Free Lossless Audio Codec.
#define WUFFS_BASE__FOURCC__FLAC 0x464C4143

// Gamma Correction.
#define WUFFS_BASE__FOURCC__GAMA 0x47414D41

// Graphics Interchange Format.
#define WUFFS_BASE__FOURCC__GIF 0x47494620

// GNU Zip.
#define WUFFS_BASE__FOURCC__GZ 0x475A2020

// High Efficiency Image File.
#define WUFFS_BASE__FOURCC__HEIF 0x48454946

// Hypertext Markup Language.
#define WUFFS_BASE__FOURCC__HTML 0x48544D4C

// International Color Consortium Profile.
#define WUFFS_BASE__FOURCC__ICCP 0x49434350

// Icon.
#define WUFFS_BASE__FOURCC__ICO 0x49434F20

// Icon Vector Graphics.
#define WUFFS_BASE__FOURCC__ICVG 0x49435647

// Initialization.
#define WUFFS_BASE__FOURCC__INI 0x494E4920

// Joint Photographic Experts Group.
#define WUFFS_BASE__FOURCC__JPEG 0x4A504547

// JavaScript.
#define WUFFS_BASE__FOURCC__JS 0x4A532020

// JavaScript Object Notation.
#define WUFFS_BASE__FOURCC__JSON 0x4A534F4E

// JSON With Commas and Comments.
#define WUFFS_BASE__FOURCC__JWCC 0x4A574343

// Key-Value Pair.
#define WUFFS_BASE__FOURCC__KVP 0x4B565020

// Key-Value Pair (Key).
#define WUFFS_BASE__FOURCC__KVPK 0x4B56504B

// Key-Value Pair (Value).
#define WUFFS_BASE__FOURCC__KVPV 0x4B565056

// Lempel–Ziv 4.
#define WUFFS_BASE__FOURCC__LZ4 0x4C5A3420

// Lzip.
#define WUFFS_BASE__FOURCC__LZIP 0x4C5A4950

// Lempel–Ziv Markov-chain Algorithm.
#define WUFFS_BASE__FOURCC__LZMA 0x4C5A4D41

// Markdown.
#define WUFFS_BASE__FOURCC__MD 0x4D442020

// Modification Time.
#define WUFFS_BASE__FOURCC__MTIM 0x4D54494D

// MPEG-1 Audio Layer III.
#define WUFFS_BASE__FOURCC__MP3 0x4D503320

// Naive Image.
#define WUFFS_BASE__FOURCC__NIE 0x4E494520

// Netpbm (Portable Anymap).
#define WUFFS_BASE__FOURCC__NPBM 0x4E50424D

// Offset (2-Dimensional).
#define WUFFS_BASE__FOURCC__OFS2 0x4F465332

// Open Type Format.
#define WUFFS_BASE__FOURCC__OTF 0x4F544620

// Portable Document Format.
#define WUFFS_BASE__FOURCC__PDF 0x50444620

// Physical Dimensions.
#define WUFFS_BASE__FOURCC__PHYD 0x50485944

// Portable Network Graphics.
#define WUFFS_BASE__FOURCC__PNG 0x504E4720

// PostScript.
#define WUFFS_BASE__FOURCC__PS 0x50532020

// Quite OK Image.
#define WUFFS_BASE__FOURCC__QOI 0x514F4920

// Random Access Compression.
#define WUFFS_BASE__FOURCC__RAC 0x52414320

// Raw.
#define WUFFS_BASE__FOURCC__RAW 0x52415720

// Resource Interchange File Format.
#define WUFFS_BASE__FOURCC__RIFF 0x52494646

// Riegeli Records.
#define WUFFS_BASE__FOURCC__RIGL 0x5249474C

// Snappy.
#define WUFFS_BASE__FOURCC__SNPY 0x534E5059

// Standard Red Green Blue (Rendering Intent).
#define WUFFS_BASE__FOURCC__SRGB 0x53524742

// Scalable Vector Graphics.
#define WUFFS_BASE__FOURCC__SVG 0x53564720

// Tape Archive.
#define WUFFS_BASE__FOURCC__TAR 0x54415220

// Text.
#define WUFFS_BASE__FOURCC__TEXT 0x54455854

// Truevision Advanced Raster Graphics Adapter.
#define WUFFS_BASE__FOURCC__TGA 0x54474120

// Thumbhash.
#define WUFFS_BASE__FOURCC__TH 0x54482020

// Tagged Image File Format.
#define WUFFS_BASE__FOURCC__TIFF 0x54494646

// Tom's Obvious Minimal Language.
#define WUFFS_BASE__FOURCC__TOML 0x544F4D4C

// Waveform.
#define WUFFS_BASE__FOURCC__WAVE 0x57415645

// Wireless Bitmap.
#define WUFFS_BASE__FOURCC__WBMP 0x57424D50

// Web Picture.
#define WUFFS_BASE__FOURCC__WEBP 0x57454250

// Web Open Font Format.
#define WUFFS_BASE__FOURCC__WOFF 0x574F4646

// Extensible Markup Language.
#define WUFFS_BASE__FOURCC__XML 0x584D4C20

// Extensible Metadata Platform.
#define WUFFS_BASE__FOURCC__XMP 0x584D5020

// Xz.
#define WUFFS_BASE__FOURCC__XZ 0x585A2020

// Zip.
#define WUFFS_BASE__FOURCC__ZIP 0x5A495020

// Zlib.
#define WUFFS_BASE__FOURCC__ZLIB 0x5A4C4942

// Zstandard.
#define WUFFS_BASE__FOURCC__ZSTD 0x5A535444

// --------

// Quirks.

#define WUFFS_BASE__QUIRK_IGNORE_CHECKSUM 1

#define WUFFS_BASE__QUIRK_QUALITY 2

// --------

// Flicks are a unit of time. One flick (frame-tick) is 1 / 705_600_000 of a
// second. See https://github.com/OculusVR/Flicks
typedef int64_t wuffs_base__flicks;

#define WUFFS_BASE__FLICKS_PER_SECOND ((uint64_t)705600000)
#define WUFFS_BASE__FLICKS_PER_MILLISECOND ((uint64_t)705600)

// ---------------- Numeric Types

// The helpers below are functions, instead of macros, because their arguments
// can be an expression that we shouldn't evaluate more than once.
//
// They are static, so that linking multiple wuffs .o files won't complain about
// duplicate function definitions.
//
// They are explicitly marked inline, even if modern compilers don't use the
// inline attribute to guide optimizations such as inlining, to avoid the
// -Wunused-function warning, and we like to compile with -Wall -Werror.

static inline int8_t  //
wuffs_base__i8__min(int8_t x, int8_t y) {
  return x < y ? x : y;
}

static inline int8_t  //
wuffs_base__i8__max(int8_t x, int8_t y) {
  return x > y ? x : y;
}

static inline int16_t  //
wuffs_base__i16__min(int16_t x, int16_t y) {
  return x < y ? x : y;
}

static inline int16_t  //
wuffs_base__i16__max(int16_t x, int16_t y) {
  return x > y ? x : y;
}

static inline int32_t  //
wuffs_base__i32__min(int32_t x, int32_t y) {
  return x < y ? x : y;
}

static inline int32_t  //
wuffs_base__i32__max(int32_t x, int32_t y) {
  return x > y ? x : y;
}

static inline int64_t  //
wuffs_base__i64__min(int64_t x, int64_t y) {
  return x < y ? x : y;
}

static inline int64_t  //
wuffs_base__i64__max(int64_t x, int64_t y) {
  return x > y ? x : y;
}

static inline uint8_t  //
wuffs_base__u8__min(uint8_t x, uint8_t y) {
  return x < y ? x : y;
}

static inline uint8_t  //
wuffs_base__u8__max(uint8_t x, uint8_t y) {
  return x > y ? x : y;
}

static inline uint16_t  //
wuffs_base__u16__min(uint16_t x, uint16_t y) {
  return x < y ? x : y;
}

static inline uint16_t  //
wuffs_base__u16__max(uint16_t x, uint16_t y) {
  return x > y ? x : y;
}

static inline uint32_t  //
wuffs_base__u32__min(uint32_t x, uint32_t y) {
  return x < y ? x : y;
}

static inline uint32_t  //
wuffs_base__u32__max(uint32_t x, uint32_t y) {
  return x > y ? x : y;
}

static inline uint64_t  //
wuffs_base__u64__min(uint64_t x, uint64_t y) {
  return x < y ? x : y;
}

static inline uint64_t  //
wuffs_base__u64__max(uint64_t x, uint64_t y) {
  return x > y ? x : y;
}

// --------

static inline uint8_t  //
wuffs_base__u8__rotate_left(uint8_t x, uint32_t n) {
  n &= 7;
  return ((uint8_t)(x << n)) | ((uint8_t)(x >> (8 - n)));
}

static inline uint8_t  //
wuffs_base__u8__rotate_right(uint8_t x, uint32_t n) {
  n &= 7;
  return ((uint8_t)(x >> n)) | ((uint8_t)(x << (8 - n)));
}

static inline uint16_t  //
wuffs_base__u16__rotate_left(uint16_t x, uint32_t n) {
  n &= 15;
  return ((uint16_t)(x << n)) | ((uint16_t)(x >> (16 - n)));
}

static inline uint16_t  //
wuffs_base__u16__rotate_right(uint16_t x, uint32_t n) {
  n &= 15;
  return ((uint16_t)(x >> n)) | ((uint16_t)(x << (16 - n)));
}

static inline uint32_t  //
wuffs_base__u32__rotate_left(uint32_t x, uint32_t n) {
  n &= 31;
  return ((uint32_t)(x << n)) | ((uint32_t)(x >> (32 - n)));
}

static inline uint32_t  //
wuffs_base__u32__rotate_right(uint32_t x, uint32_t n) {
  n &= 31;
  return ((uint32_t)(x >> n)) | ((uint32_t)(x << (32 - n)));
}

static inline uint64_t  //
wuffs_base__u64__rotate_left(uint64_t x, uint32_t n) {
  n &= 63;
  return ((uint64_t)(x << n)) | ((uint64_t)(x >> (64 - n)));
}

static inline uint64_t  //
wuffs_base__u64__rotate_right(uint64_t x, uint32_t n) {
  n &= 63;
  return ((uint64_t)(x >> n)) | ((uint64_t)(x << (64 - n)));
}

// --------

// Saturating arithmetic (sat_add, sat_sub) branchless bit-twiddling algorithms
// are per https://locklessinc.com/articles/sat_arithmetic/
//
// It is important that the underlying types are unsigned integers, as signed
// integer arithmetic overflow is undefined behavior in C.

static inline uint8_t  //
wuffs_base__u8__sat_add(uint8_t x, uint8_t y) {
  uint8_t res = (uint8_t)(x + y);
  res |= (uint8_t)(-(res < x));
  return res;
}

static inline uint8_t  //
wuffs_base__u8__sat_sub(uint8_t x, uint8_t y) {
  uint8_t res = (uint8_t)(x - y);
  res &= (uint8_t)(-(res <= x));
  return res;
}

static inline uint16_t  //
wuffs_base__u16__sat_add(uint16_t x, uint16_t y) {
  uint16_t res = (uint16_t)(x + y);
  res |= (uint16_t)(-(res < x));
  return res;
}

static inline uint16_t  //
wuffs_base__u16__sat_sub(uint16_t x, uint16_t y) {
  uint16_t res = (uint16_t)(x - y);
  res &= (uint16_t)(-(res <= x));
  return res;
}

static inline uint32_t  //
wuffs_base__u32__sat_add(uint32_t x, uint32_t y) {
  uint32_t res = (uint32_t)(x + y);
  res |= (uint32_t)(-(res < x));
  return res;
}

static inline uint32_t  //
wuffs_base__u32__sat_sub(uint32_t x, uint32_t y) {
  uint32_t res = (uint32_t)(x - y);
  res &= (uint32_t)(-(res <= x));
  return res;
}

static inline uint64_t  //
wuffs_base__u64__sat_add(uint64_t x, uint64_t y) {
  uint64_t res = (uint64_t)(x + y);
  res |= (uint64_t)(-(res < x));
  return res;
}

static inline uint64_t  //
wuffs_base__u64__sat_sub(uint64_t x, uint64_t y) {
  uint64_t res = (uint64_t)(x - y);
  res &= (uint64_t)(-(res <= x));
  return res;
}

// --------

typedef struct wuffs_base__multiply_u64__output__struct {
  uint64_t lo;
  uint64_t hi;
} wuffs_base__multiply_u64__output;

// wuffs_base__multiply_u64 returns x*y as a 128-bit value.
//
// The maximum inclusive output hi_lo is 0xFFFFFFFFFFFFFFFE_0000000000000001.
static inline wuffs_base__multiply_u64__output  //
wuffs_base__multiply_u64(uint64_t x, uint64_t y) {
#if defined(__SIZEOF_INT128__)
  __uint128_t z = ((__uint128_t)x) * ((__uint128_t)y);
  wuffs_base__multiply_u64__output o;
  o.lo = ((uint64_t)(z));
  o.hi = ((uint64_t)(z >> 64));
  return o;
#else
  // TODO: consider using the _mul128 intrinsic if defined(_MSC_VER).
  uint64_t x0 = x & 0xFFFFFFFF;
  uint64_t x1 = x >> 32;
  uint64_t y0 = y & 0xFFFFFFFF;
  uint64_t y1 = y >> 32;
  uint64_t w0 = x0 * y0;
  uint64_t t = (x1 * y0) + (w0 >> 32);
  uint64_t w1 = t & 0xFFFFFFFF;
  uint64_t w2 = t >> 32;
  w1 += x0 * y1;
  wuffs_base__multiply_u64__output o;
  o.lo = x * y;
  o.hi = (x1 * y1) + w2 + (w1 >> 32);
  return o;
#endif
}

// --------

typedef struct wuffs_base__bitvec256__struct {
  // elements_u64[0] holds the LSBs (least significant bits) and
  // elements_u64[3] holds the MSBs (most significant bits).
  uint64_t elements_u64[4];
} wuffs_base__bitvec256;

static inline wuffs_base__bitvec256  //
wuffs_base__make_bitvec256(uint64_t e00,
                           uint64_t e01,
                           uint64_t e02,
                           uint64_t e03) {
  wuffs_base__bitvec256 res;
  res.elements_u64[0] = e00;
  res.elements_u64[1] = e01;
  res.elements_u64[2] = e02;
  res.elements_u64[3] = e03;
  return res;
}

static inline uint64_t  //
wuffs_base__bitvec256__get_u64(const wuffs_base__bitvec256* b, uint32_t i) {
  return b->elements_u64[i & 3];
}

// --------

// wuffs_base__optional_u63 is like a std::optional<uint64_t>, but for C (not
// just C++) and the value can only hold 63 bits (not 64).
//
// Do not manipulate repr directly; it is a private implementation detail.
typedef struct wuffs_base__optional_u63__struct {
  uint64_t repr;

#ifdef __cplusplus
  inline bool has_value() const;
  inline uint64_t value() const;
  inline uint64_t value_or(uint64_t default_value) const;
#endif  // __cplusplus

} wuffs_base__optional_u63;

// wuffs_base__make_optional_u63 ignores value when has_value is false.
//
// Preconditions:
//  - value < (1 << 63).
static inline wuffs_base__optional_u63  //
wuffs_base__make_optional_u63(bool has_value, uint64_t value) {
  wuffs_base__optional_u63 res;
  res.repr = has_value ? ((value << 1u) | 1u) : 0u;
  return res;
}

static inline bool  //
wuffs_base__optional_u63__has_value(const wuffs_base__optional_u63* o) {
  return o->repr;
}

// wuffs_base__optional_u63__value returns zero when o does not have a value.
static inline uint64_t  //
wuffs_base__optional_u63__value(const wuffs_base__optional_u63* o) {
  return o->repr >> 1u;
}

static inline uint64_t  //
wuffs_base__optional_u63__value_or(const wuffs_base__optional_u63* o,
                                   uint64_t default_value) {
  return o->repr ? (o->repr >> 1u) : default_value;
}

#ifdef __cplusplus

inline bool  //
wuffs_base__optional_u63::has_value() const {
  return wuffs_base__optional_u63__has_value(this);
}

inline uint64_t  //
wuffs_base__optional_u63::value() const {
  return wuffs_base__optional_u63__value(this);
}

inline uint64_t  //
wuffs_base__optional_u63::value_or(uint64_t default_value) const {
  return wuffs_base__optional_u63__value_or(this, default_value);
}

#endif  // __cplusplus

// --------

// The "defined(__clang__)" isn't redundant. While vanilla clang defines
// __GNUC__, clang-cl (which mimics MSVC's cl.exe) does not.
#if (defined(__GNUC__) || defined(__clang__)) && (__SIZEOF_LONG__ == 8)

static inline uint32_t  //
wuffs_base__count_leading_zeroes_u64(uint64_t u) {
  return u ? ((uint32_t)(__builtin_clzl(u))) : 64u;
}

#else
// TODO: consider using the _BitScanReverse intrinsic if defined(_MSC_VER).

static inline uint32_t  //
wuffs_base__count_leading_zeroes_u64(uint64_t u) {
  if (u == 0) {
    return 64;
  }

  uint32_t n = 0;
  if ((u >> 32) == 0) {
    n |= 32;
    u <<= 32;
  }
  if ((u >> 48) == 0) {
    n |= 16;
    u <<= 16;
  }
  if ((u >> 56) == 0) {
    n |= 8;
    u <<= 8;
  }
  if ((u >> 60) == 0) {
    n |= 4;
    u <<= 4;
  }
  if ((u >> 62) == 0) {
    n |= 2;
    u <<= 2;
  }
  if ((u >> 63) == 0) {
    n |= 1;
    u <<= 1;
  }
  return n;
}

#endif  // (defined(__GNUC__) || defined(__clang__)) && (__SIZEOF_LONG__ == 8)

// --------

// Normally, the wuffs_base__peek_etc and wuffs_base__poke_etc implementations
// are both (1) correct regardless of CPU endianness and (2) very fast (e.g. an
// inlined wuffs_base__peek_u32le__no_bounds_check call, in an optimized clang
// or gcc build, is a single MOV instruction on x86_64).
//
// However, the endian-agnostic implementations are slow on Microsoft's C
// compiler (MSC). Alternative memcpy-based implementations restore speed, but
// they are only correct on little-endian CPU architectures. Defining
// WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE opts in to these implementations.
//
// https://godbolt.org/z/q4MfjzTPh
#if defined(_MSC_VER) && !defined(__clang__) && \
    (defined(_M_ARM64) || defined(_M_X64))
#define WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE
#endif

#define wuffs_base__peek_u8be__no_bounds_check \
  wuffs_base__peek_u8__no_bounds_check
#define wuffs_base__peek_u8le__no_bounds_check \
  wuffs_base__peek_u8__no_bounds_check

static inline uint8_t  //
wuffs_base__peek_u8__no_bounds_check(const uint8_t* p) {
  return p[0];
}

static inline uint16_t  //
wuffs_base__peek_u16be__no_bounds_check(const uint8_t* p) {
#if defined(WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE)
  uint16_t x;
  memcpy(&x, p, 2);
  return _byteswap_ushort(x);
#else
  return (uint16_t)(((uint16_t)(p[0]) << 8) | ((uint16_t)(p[1]) << 0));
#endif
}

static inline uint16_t  //
wuffs_base__peek_u16le__no_bounds_check(const uint8_t* p) {
#if defined(WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE)
  uint16_t x;
  memcpy(&x, p, 2);
  return x;
#else
  return (uint16_t)(((uint16_t)(p[0]) << 0) | ((uint16_t)(p[1]) << 8));
#endif
}

static inline uint32_t  //
wuffs_base__peek_u24be__no_bounds_check(const uint8_t* p) {
  return ((uint32_t)(p[0]) << 16) | ((uint32_t)(p[1]) << 8) |
         ((uint32_t)(p[2]) << 0);
}

static inline uint32_t  //
wuffs_base__peek_u24le__no_bounds_check(const uint8_t* p) {
  return ((uint32_t)(p[0]) << 0) | ((uint32_t)(p[1]) << 8) |
         ((uint32_t)(p[2]) << 16);
}

static inline uint32_t  //
wuffs_base__peek_u32be__no_bounds_check(const uint8_t* p) {
#if defined(WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE)
  uint32_t x;
  memcpy(&x, p, 4);
  return _byteswap_ulong(x);
#else
  return ((uint32_t)(p[0]) << 24) | ((uint32_t)(p[1]) << 16) |
         ((uint32_t)(p[2]) << 8) | ((uint32_t)(p[3]) << 0);
#endif
}

static inline uint32_t  //
wuffs_base__peek_u32le__no_bounds_check(const uint8_t* p) {
#if defined(WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE)
  uint32_t x;
  memcpy(&x, p, 4);
  return x;
#else
  return ((uint32_t)(p[0]) << 0) | ((uint32_t)(p[1]) << 8) |
         ((uint32_t)(p[2]) << 16) | ((uint32_t)(p[3]) << 24);
#endif
}

static inline uint64_t  //
wuffs_base__peek_u40be__no_bounds_check(const uint8_t* p) {
  return ((uint64_t)(p[0]) << 32) | ((uint64_t)(p[1]) << 24) |
         ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 8) |
         ((uint64_t)(p[4]) << 0);
}

static inline uint64_t  //
wuffs_base__peek_u40le__no_bounds_check(const uint8_t* p) {
  return ((uint64_t)(p[0]) << 0) | ((uint64_t)(p[1]) << 8) |
         ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 24) |
         ((uint64_t)(p[4]) << 32);
}

static inline uint64_t  //
wuffs_base__peek_u48be__no_bounds_check(const uint8_t* p) {
  return ((uint64_t)(p[0]) << 40) | ((uint64_t)(p[1]) << 32) |
         ((uint64_t)(p[2]) << 24) | ((uint64_t)(p[3]) << 16) |
         ((uint64_t)(p[4]) << 8) | ((uint64_t)(p[5]) << 0);
}

static inline uint64_t  //
wuffs_base__peek_u48le__no_bounds_check(const uint8_t* p) {
  return ((uint64_t)(p[0]) << 0) | ((uint64_t)(p[1]) << 8) |
         ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 24) |
         ((uint64_t)(p[4]) << 32) | ((uint64_t)(p[5]) << 40);
}

static inline uint64_t  //
wuffs_base__peek_u56be__no_bounds_check(const uint8_t* p) {
  return ((uint64_t)(p[0]) << 48) | ((uint64_t)(p[1]) << 40) |
         ((uint64_t)(p[2]) << 32) | ((uint64_t)(p[3]) << 24) |
         ((uint64_t)(p[4]) << 16) | ((uint64_t)(p[5]) << 8) |
         ((uint64_t)(p[6]) << 0);
}

static inline uint64_t  //
wuffs_base__peek_u56le__no_bounds_check(const uint8_t* p) {
  return ((uint64_t)(p[0]) << 0) | ((uint64_t)(p[1]) << 8) |
         ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 24) |
         ((uint64_t)(p[4]) << 32) | ((uint64_t)(p[5]) << 40) |
         ((uint64_t)(p[6]) << 48);
}

static inline uint64_t  //
wuffs_base__peek_u64be__no_bounds_check(const uint8_t* p) {
#if defined(WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE)
  uint64_t x;
  memcpy(&x, p, 8);
  return _byteswap_uint64(x);
#else
  return ((uint64_t)(p[0]) << 56) | ((uint64_t)(p[1]) << 48) |
         ((uint64_t)(p[2]) << 40) | ((uint64_t)(p[3]) << 32) |
         ((uint64_t)(p[4]) << 24) | ((uint64_t)(p[5]) << 16) |
         ((uint64_t)(p[6]) << 8) | ((uint64_t)(p[7]) << 0);
#endif
}

static inline uint64_t  //
wuffs_base__peek_u64le__no_bounds_check(const uint8_t* p) {
#if defined(WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE)
  uint64_t x;
  memcpy(&x, p, 8);
  return x;
#else
  return ((uint64_t)(p[0]) << 0) | ((uint64_t)(p[1]) << 8) |
         ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 24) |
         ((uint64_t)(p[4]) << 32) | ((uint64_t)(p[5]) << 40) |
         ((uint64_t)(p[6]) << 48) | ((uint64_t)(p[7]) << 56);
#endif
}

// --------

#define wuffs_base__poke_u8be__no_bounds_check \
  wuffs_base__poke_u8__no_bounds_check
#define wuffs_base__poke_u8le__no_bounds_check \
  wuffs_base__poke_u8__no_bounds_check

static inline void  //
wuffs_base__poke_u8__no_bounds_check(uint8_t* p, uint8_t x) {
  p[0] = x;
}

static inline void  //
wuffs_base__poke_u16be__no_bounds_check(uint8_t* p, uint16_t x) {
  p[0] = (uint8_t)(x >> 8);
  p[1] = (uint8_t)(x >> 0);
}

static inline void  //
wuffs_base__poke_u16le__no_bounds_check(uint8_t* p, uint16_t x) {
#if defined(WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE) || \
    (defined(__GNUC__) && !defined(__clang__) && defined(__x86_64__))
  // This seems to perform better on gcc 10 (but not clang 9). Clang also
  // defines "__GNUC__".
  memcpy(p, &x, 2);
#else
  p[0] = (uint8_t)(x >> 0);
  p[1] = (uint8_t)(x >> 8);
#endif
}

static inline void  //
wuffs_base__poke_u24be__no_bounds_check(uint8_t* p, uint32_t x) {
  p[0] = (uint8_t)(x >> 16);
  p[1] = (uint8_t)(x >> 8);
  p[2] = (uint8_t)(x >> 0);
}

static inline void  //
wuffs_base__poke_u24le__no_bounds_check(uint8_t* p, uint32_t x) {
  p[0] = (uint8_t)(x >> 0);
  p[1] = (uint8_t)(x >> 8);
  p[2] = (uint8_t)(x >> 16);
}

static inline void  //
wuffs_base__poke_u32be__no_bounds_check(uint8_t* p, uint32_t x) {
  p[0] = (uint8_t)(x >> 24);
  p[1] = (uint8_t)(x >> 16);
  p[2] = (uint8_t)(x >> 8);
  p[3] = (uint8_t)(x >> 0);
}

static inline void  //
wuffs_base__poke_u32le__no_bounds_check(uint8_t* p, uint32_t x) {
#if defined(WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE) || \
    (defined(__GNUC__) && !defined(__clang__) && defined(__x86_64__))
  // This seems to perform better on gcc 10 (but not clang 9). Clang also
  // defines "__GNUC__".
  memcpy(p, &x, 4);
#else
  p[0] = (uint8_t)(x >> 0);
  p[1] = (uint8_t)(x >> 8);
  p[2] = (uint8_t)(x >> 16);
  p[3] = (uint8_t)(x >> 24);
#endif
}

static inline void  //
wuffs_base__poke_u40be__no_bounds_check(uint8_t* p, uint64_t x) {
  p[0] = (uint8_t)(x >> 32);
  p[1] = (uint8_t)(x >> 24);
  p[2] = (uint8_t)(x >> 16);
  p[3] = (uint8_t)(x >> 8);
  p[4] = (uint8_t)(x >> 0);
}

static inline void  //
wuffs_base__poke_u40le__no_bounds_check(uint8_t* p, uint64_t x) {
  p[0] = (uint8_t)(x >> 0);
  p[1] = (uint8_t)(x >> 8);
  p[2] = (uint8_t)(x >> 16);
  p[3] = (uint8_t)(x >> 24);
  p[4] = (uint8_t)(x >> 32);
}

static inline void  //
wuffs_base__poke_u48be__no_bounds_check(uint8_t* p, uint64_t x) {
  p[0] = (uint8_t)(x >> 40);
  p[1] = (uint8_t)(x >> 32);
  p[2] = (uint8_t)(x >> 24);
  p[3] = (uint8_t)(x >> 16);
  p[4] = (uint8_t)(x >> 8);
  p[5] = (uint8_t)(x >> 0);
}

static inline void  //
wuffs_base__poke_u48le__no_bounds_check(uint8_t* p, uint64_t x) {
  p[0] = (uint8_t)(x >> 0);
  p[1] = (uint8_t)(x >> 8);
  p[2] = (uint8_t)(x >> 16);
  p[3] = (uint8_t)(x >> 24);
  p[4] = (uint8_t)(x >> 32);
  p[5] = (uint8_t)(x >> 40);
}

static inline void  //
wuffs_base__poke_u56be__no_bounds_check(uint8_t* p, uint64_t x) {
  p[0] = (uint8_t)(x >> 48);
  p[1] = (uint8_t)(x >> 40);
  p[2] = (uint8_t)(x >> 32);
  p[3] = (uint8_t)(x >> 24);
  p[4] = (uint8_t)(x >> 16);
  p[5] = (uint8_t)(x >> 8);
  p[6] = (uint8_t)(x >> 0);
}

static inline void  //
wuffs_base__poke_u56le__no_bounds_check(uint8_t* p, uint64_t x) {
  p[0] = (uint8_t)(x >> 0);
  p[1] = (uint8_t)(x >> 8);
  p[2] = (uint8_t)(x >> 16);
  p[3] = (uint8_t)(x >> 24);
  p[4] = (uint8_t)(x >> 32);
  p[5] = (uint8_t)(x >> 40);
  p[6] = (uint8_t)(x >> 48);
}

static inline void  //
wuffs_base__poke_u64be__no_bounds_check(uint8_t* p, uint64_t x) {
  p[0] = (uint8_t)(x >> 56);
  p[1] = (uint8_t)(x >> 48);
  p[2] = (uint8_t)(x >> 40);
  p[3] = (uint8_t)(x >> 32);
  p[4] = (uint8_t)(x >> 24);
  p[5] = (uint8_t)(x >> 16);
  p[6] = (uint8_t)(x >> 8);
  p[7] = (uint8_t)(x >> 0);
}

static inline void  //
wuffs_base__poke_u64le__no_bounds_check(uint8_t* p, uint64_t x) {
#if defined(WUFFS_BASE__USE_MEMCPY_LE_PEEK_POKE) || \
    (defined(__GNUC__) && !defined(__clang__) && defined(__x86_64__))
  // This seems to perform better on gcc 10 (but not clang 9). Clang also
  // defines "__GNUC__".
  memcpy(p, &x, 8);
#else
  p[0] = (uint8_t)(x >> 0);
  p[1] = (uint8_t)(x >> 8);
  p[2] = (uint8_t)(x >> 16);
  p[3] = (uint8_t)(x >> 24);
  p[4] = (uint8_t)(x >> 32);
  p[5] = (uint8_t)(x >> 40);
  p[6] = (uint8_t)(x >> 48);
  p[7] = (uint8_t)(x >> 56);
#endif
}

// ---------------- Slices and Tables

// WUFFS_BASE__SLICE is a 1-dimensional buffer.
//
// len measures a number of elements, not necessarily a size in bytes.
//
// A value with all fields NULL or zero is a valid, empty slice.
#define WUFFS_BASE__SLICE(T) \
  struct {                   \
    T* ptr;                  \
    size_t len;              \
  }

// WUFFS_BASE__TABLE is a 2-dimensional buffer.
//
// width, height and stride measure a number of elements, not necessarily a
// size in bytes.
//
// A value with all fields NULL or zero is a valid, empty table.
#define WUFFS_BASE__TABLE(T) \
  struct {                   \
    T* ptr;                  \
    size_t width;            \
    size_t height;           \
    size_t stride;           \
  }

typedef WUFFS_BASE__SLICE(uint8_t) wuffs_base__slice_u8;
typedef WUFFS_BASE__SLICE(uint16_t) wuffs_base__slice_u16;
typedef WUFFS_BASE__SLICE(uint32_t) wuffs_base__slice_u32;
typedef WUFFS_BASE__SLICE(uint64_t) wuffs_base__slice_u64;

typedef WUFFS_BASE__TABLE(uint8_t) wuffs_base__table_u8;
typedef WUFFS_BASE__TABLE(uint16_t) wuffs_base__table_u16;
typedef WUFFS_BASE__TABLE(uint32_t) wuffs_base__table_u32;
typedef WUFFS_BASE__TABLE(uint64_t) wuffs_base__table_u64;

static inline wuffs_base__slice_u8  //
wuffs_base__make_slice_u8(uint8_t* ptr, size_t len) {
  wuffs_base__slice_u8 ret;
  ret.ptr = ptr;
  ret.len = len;
  return ret;
}

static inline wuffs_base__slice_u16  //
wuffs_base__make_slice_u16(uint16_t* ptr, size_t len) {
  wuffs_base__slice_u16 ret;
  ret.ptr = ptr;
  ret.len = len;
  return ret;
}

static inline wuffs_base__slice_u32  //
wuffs_base__make_slice_u32(uint32_t* ptr, size_t len) {
  wuffs_base__slice_u32 ret;
  ret.ptr = ptr;
  ret.len = len;
  return ret;
}

static inline wuffs_base__slice_u64  //
wuffs_base__make_slice_u64(uint64_t* ptr, size_t len) {
  wuffs_base__slice_u64 ret;
  ret.ptr = ptr;
  ret.len = len;
  return ret;
}

static inline wuffs_base__slice_u8  //
wuffs_base__make_slice_u8_ij(uint8_t* ptr, size_t i, size_t j) {
  wuffs_base__slice_u8 ret;
  ret.ptr = ptr ? (ptr + i) : NULL;
  ret.len = (j >= i) ? (j - i) : 0;
  return ret;
}

static inline wuffs_base__slice_u16  //
wuffs_base__make_slice_u16_ij(uint16_t* ptr, size_t i, size_t j) {
  wuffs_base__slice_u16 ret;
  ret.ptr = ptr ? (ptr + i) : NULL;
  ret.len = (j >= i) ? (j - i) : 0;
  return ret;
}

static inline wuffs_base__slice_u32  //
wuffs_base__make_slice_u32_ij(uint32_t* ptr, size_t i, size_t j) {
  wuffs_base__slice_u32 ret;
  ret.ptr = ptr ? (ptr + i) : NULL;
  ret.len = (j >= i) ? (j - i) : 0;
  return ret;
}

static inline wuffs_base__slice_u64  //
wuffs_base__make_slice_u64_ij(uint64_t* ptr, size_t i, size_t j) {
  wuffs_base__slice_u64 ret;
  ret.ptr = ptr ? (ptr + i) : NULL;
  ret.len = (j >= i) ? (j - i) : 0;
  return ret;
}

static inline wuffs_base__slice_u8  //
wuffs_base__empty_slice_u8(void) {
  wuffs_base__slice_u8 ret;
  ret.ptr = NULL;
  ret.len = 0;
  return ret;
}

static inline wuffs_base__slice_u16  //
wuffs_base__empty_slice_u16(void) {
  wuffs_base__slice_u16 ret;
  ret.ptr = NULL;
  ret.len = 0;
  return ret;
}

static inline wuffs_base__slice_u32  //
wuffs_base__empty_slice_u32(void) {
  wuffs_base__slice_u32 ret;
  ret.ptr = NULL;
  ret.len = 0;
  return ret;
}

static inline wuffs_base__slice_u64  //
wuffs_base__empty_slice_u64(void) {
  wuffs_base__slice_u64 ret;
  ret.ptr = NULL;
  ret.len = 0;
  return ret;
}

static inline wuffs_base__table_u8  //
wuffs_base__make_table_u8(uint8_t* ptr,
                          size_t width,
                          size_t height,
                          size_t stride) {
  wuffs_base__table_u8 ret;
  ret.ptr = ptr;
  ret.width = width;
  ret.height = height;
  ret.stride = stride;
  return ret;
}

static inline wuffs_base__table_u16  //
wuffs_base__make_table_u16(uint16_t* ptr,
                           size_t width,
                           size_t height,
                           size_t stride) {
  wuffs_base__table_u16 ret;
  ret.ptr = ptr;
  ret.width = width;
  ret.height = height;
  ret.stride = stride;
  return ret;
}

static inline wuffs_base__table_u32  //
wuffs_base__make_table_u32(uint32_t* ptr,
                           size_t width,
                           size_t height,
                           size_t stride) {
  wuffs_base__table_u32 ret;
  ret.ptr = ptr;
  ret.width = width;
  ret.height = height;
  ret.stride = stride;
  return ret;
}

static inline wuffs_base__table_u64  //
wuffs_base__make_table_u64(uint64_t* ptr,
                           size_t width,
                           size_t height,
                           size_t stride) {
  wuffs_base__table_u64 ret;
  ret.ptr = ptr;
  ret.width = width;
  ret.height = height;
  ret.stride = stride;
  return ret;
}

static inline wuffs_base__table_u8  //
wuffs_base__empty_table_u8(void) {
  wuffs_base__table_u8 ret;
  ret.ptr = NULL;
  ret.width = 0;
  ret.height = 0;
  ret.stride = 0;
  return ret;
}

static inline wuffs_base__table_u16  //
wuffs_base__empty_table_u16(void) {
  wuffs_base__table_u16 ret;
  ret.ptr = NULL;
  ret.width = 0;
  ret.height = 0;
  ret.stride = 0;
  return ret;
}

static inline wuffs_base__table_u32  //
wuffs_base__empty_table_u32(void) {
  wuffs_base__table_u32 ret;
  ret.ptr = NULL;
  ret.width = 0;
  ret.height = 0;
  ret.stride = 0;
  return ret;
}

static inline wuffs_base__table_u64  //
wuffs_base__empty_table_u64(void) {
  wuffs_base__table_u64 ret;
  ret.ptr = NULL;
  ret.width = 0;
  ret.height = 0;
  ret.stride = 0;
  return ret;
}

static inline bool  //
wuffs_base__slice_u8__overlaps(wuffs_base__slice_u8 s, wuffs_base__slice_u8 t) {
  return ((s.ptr <= t.ptr) && (t.ptr < (s.ptr + s.len))) ||
         ((t.ptr <= s.ptr) && (s.ptr < (t.ptr + t.len)));
}

// wuffs_base__slice_u8__subslice_i returns s[i:].
//
// It returns an empty slice if i is out of bounds.
static inline wuffs_base__slice_u8  //
wuffs_base__slice_u8__subslice_i(wuffs_base__slice_u8 s, uint64_t i) {
  if ((i <= SIZE_MAX) && (i <= s.len)) {
    return wuffs_base__make_slice_u8(s.ptr + i, ((size_t)(s.len - i)));
  }
  return wuffs_base__empty_slice_u8();
}

// wuffs_base__slice_u8__subslice_j returns s[:j].
//
// It returns an empty slice if j is out of bounds.
static inline wuffs_base__slice_u8  //
wuffs_base__slice_u8__subslice_j(wuffs_base__slice_u8 s, uint64_t j) {
  if ((j <= SIZE_MAX) && (j <= s.len)) {
    return wuffs_base__make_slice_u8(s.ptr, ((size_t)j));
  }
  return wuffs_base__empty_slice_u8();
}

// wuffs_base__slice_u8__subslice_ij returns s[i:j].
//
// It returns an empty slice if i or j is out of bounds.
static inline wuffs_base__slice_u8  //
wuffs_base__slice_u8__subslice_ij(wuffs_base__slice_u8 s,
                                  uint64_t i,
                                  uint64_t j) {
  if ((i <= j) && (j <= SIZE_MAX) && (j <= s.len)) {
    return wuffs_base__make_slice_u8(s.ptr + i, ((size_t)(j - i)));
  }
  return wuffs_base__empty_slice_u8();
}

// wuffs_base__table_u8__subtable_ij returns t[ix:jx, iy:jy].
//
// It returns an empty table if i or j is out of bounds.
static inline wuffs_base__table_u8  //
wuffs_base__table_u8__subtable_ij(wuffs_base__table_u8 t,
                                  uint64_t ix,
                                  uint64_t iy,
                                  uint64_t jx,
                                  uint64_t jy) {
  if ((ix <= jx) && (jx <= SIZE_MAX) && (jx <= t.width) &&  //
      (iy <= jy) && (jy <= SIZE_MAX) && (jy <= t.height)) {
    return wuffs_base__make_table_u8(t.ptr + ix + (iy * t.stride),  //
                                     ((size_t)(jx - ix)),           //
                                     ((size_t)(jy - iy)),           //
                                     t.stride);                     //
  }
  return wuffs_base__make_table_u8(NULL, 0, 0, 0);
}

// wuffs_base__table__flattened_length returns the number of elements covered
// by the 1-dimensional span that backs a 2-dimensional table. This counts the
// elements inside the table and, when width != stride, the elements outside
// the table but between its rows.
//
// For example, consider a width 10, height 4, stride 10 table. Mark its first
// and last (inclusive) elements with 'a' and 'z'. This function returns 40.
//
//    a123456789
//    0123456789
//    0123456789
//    012345678z
//
// Now consider the sub-table of that from (2, 1) inclusive to (8, 4) exclusive.
//
//    a123456789
//    01iiiiiioo
//    ooiiiiiioo
//    ooiiiiii8z
//
// This function (called with width 6, height 3, stride 10) returns 26: 18 'i'
// inside elements plus 8 'o' outside elements. Note that 26 is less than a
// naive (height * stride = 30) computation. Indeed, advancing 29 elements from
// the first 'i' would venture past 'z', out of bounds of the original table.
//
// It does not check for overflow, but if the arguments come from a table that
// exists in memory and each element occupies a positive number of bytes then
// the result should be bounded by the amount of allocatable memory (which
// shouldn't overflow SIZE_MAX).
static inline size_t  //
wuffs_base__table__flattened_length(size_t width,
                                    size_t height,
                                    size_t stride) {
  if (height == 0) {
    return 0;
  }
  return ((height - 1) * stride) + width;
}

// ---------------- Magic Numbers

// wuffs_base__magic_number_guess_fourcc guesses the file format of some data,
// given its starting bytes (the prefix_data argument) and whether or not there
// may be further bytes (the prefix_closed argument; true means that
// prefix_data is the entire data).
//
// It returns a positive FourCC value on success.
//
// It returns zero if nothing matches its hard-coded list of 'magic numbers'.
//
// It returns a negative value if prefix_closed is false and a longer prefix is
// required for a conclusive result. For example, a single 'B' byte (without
// further data) is not enough to discriminate the BMP and BPG image file
// formats. Similarly, a single '\xFF' byte might be the start of JPEG data or
// it might be the start of some other binary data.
//
// It does not do a full validity check. Like any guess made from a short
// prefix of the data, it may return false positives. Data that starts with 99
// bytes of valid JPEG followed by corruption or truncation is an invalid JPEG
// image overall, but this function will still return WUFFS_BASE__FOURCC__JPEG.
//
// Another source of false positives is that some 'magic numbers' are valid
// ASCII data. A file starting with "GIF87a and GIF89a are the two versions of
// GIF" will match GIF's 'magic number' even if it's plain text, not an image.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__MAGIC sub-module, not just
// WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC int32_t  //
wuffs_base__magic_number_guess_fourcc(wuffs_base__slice_u8 prefix_data,
                                      bool prefix_closed);

// ---------------- Quirk Values

// These constants are the value half of a key-value pair, where the key is
// WUFFS_BASE__QUIRK_QUALITY.
//
// In the Wuffs API, set_quirk takes a u64 value. These macro definitions are
// likewise unsigned values (uint64_t) but for this particular key, they are
// best interpreted as signed values (int64_t). "Lower-than-default quality"
// and "higher-than-default quality", as signed values, are -1 and +1.
//
// See doc/note/quirks.md for some more discussion about trade-offs.
#define WUFFS_BASE__QUIRK_QUALITY__VALUE__LOWER_QUALITY UINT64_MAX
#define WUFFS_BASE__QUIRK_QUALITY__VALUE__HIGHER_QUALITY ((uint64_t)1)

// ---------------- Ranges and Rects

// See https://github.com/google/wuffs/blob/main/doc/note/ranges-and-rects.md

typedef struct wuffs_base__range_ii_u32__struct {
  uint32_t min_incl;
  uint32_t max_incl;

#ifdef __cplusplus
  inline bool is_empty() const;
  inline bool equals(wuffs_base__range_ii_u32__struct s) const;
  inline wuffs_base__range_ii_u32__struct intersect(
      wuffs_base__range_ii_u32__struct s) const;
  inline wuffs_base__range_ii_u32__struct unite(
      wuffs_base__range_ii_u32__struct s) const;
  inline bool contains(uint32_t x) const;
  inline bool contains_range(wuffs_base__range_ii_u32__struct s) const;
#endif  // __cplusplus

} wuffs_base__range_ii_u32;

static inline wuffs_base__range_ii_u32  //
wuffs_base__empty_range_ii_u32(void) {
  wuffs_base__range_ii_u32 ret;
  ret.min_incl = 0;
  ret.max_incl = 0;
  return ret;
}

static inline wuffs_base__range_ii_u32  //
wuffs_base__make_range_ii_u32(uint32_t min_incl, uint32_t max_incl) {
  wuffs_base__range_ii_u32 ret;
  ret.min_incl = min_incl;
  ret.max_incl = max_incl;
  return ret;
}

static inline bool  //
wuffs_base__range_ii_u32__is_empty(const wuffs_base__range_ii_u32* r) {
  return r->min_incl > r->max_incl;
}

static inline bool  //
wuffs_base__range_ii_u32__equals(const wuffs_base__range_ii_u32* r,
                                 wuffs_base__range_ii_u32 s) {
  return (r->min_incl == s.min_incl && r->max_incl == s.max_incl) ||
         (wuffs_base__range_ii_u32__is_empty(r) &&
          wuffs_base__range_ii_u32__is_empty(&s));
}

static inline wuffs_base__range_ii_u32  //
wuffs_base__range_ii_u32__intersect(const wuffs_base__range_ii_u32* r,
                                    wuffs_base__range_ii_u32 s) {
  wuffs_base__range_ii_u32 t;
  t.min_incl = wuffs_base__u32__max(r->min_incl, s.min_incl);
  t.max_incl = wuffs_base__u32__min(r->max_incl, s.max_incl);
  return t;
}

static inline wuffs_base__range_ii_u32  //
wuffs_base__range_ii_u32__unite(const wuffs_base__range_ii_u32* r,
                                wuffs_base__range_ii_u32 s) {
  if (wuffs_base__range_ii_u32__is_empty(r)) {
    return s;
  }
  if (wuffs_base__range_ii_u32__is_empty(&s)) {
    return *r;
  }
  wuffs_base__range_ii_u32 t;
  t.min_incl = wuffs_base__u32__min(r->min_incl, s.min_incl);
  t.max_incl = wuffs_base__u32__max(r->max_incl, s.max_incl);
  return t;
}

static inline bool  //
wuffs_base__range_ii_u32__contains(const wuffs_base__range_ii_u32* r,
                                   uint32_t x) {
  return (r->min_incl <= x) && (x <= r->max_incl);
}

static inline bool  //
wuffs_base__range_ii_u32__contains_range(const wuffs_base__range_ii_u32* r,
                                         wuffs_base__range_ii_u32 s) {
  return wuffs_base__range_ii_u32__equals(
      &s, wuffs_base__range_ii_u32__intersect(r, s));
}

#ifdef __cplusplus

inline bool  //
wuffs_base__range_ii_u32::is_empty() const {
  return wuffs_base__range_ii_u32__is_empty(this);
}

inline bool  //
wuffs_base__range_ii_u32::equals(wuffs_base__range_ii_u32 s) const {
  return wuffs_base__range_ii_u32__equals(this, s);
}

inline wuffs_base__range_ii_u32  //
wuffs_base__range_ii_u32::intersect(wuffs_base__range_ii_u32 s) const {
  return wuffs_base__range_ii_u32__intersect(this, s);
}

inline wuffs_base__range_ii_u32  //
wuffs_base__range_ii_u32::unite(wuffs_base__range_ii_u32 s) const {
  return wuffs_base__range_ii_u32__unite(this, s);
}

inline bool  //
wuffs_base__range_ii_u32::contains(uint32_t x) const {
  return wuffs_base__range_ii_u32__contains(this, x);
}

inline bool  //
wuffs_base__range_ii_u32::contains_range(wuffs_base__range_ii_u32 s) const {
  return wuffs_base__range_ii_u32__contains_range(this, s);
}

#endif  // __cplusplus

// --------

typedef struct wuffs_base__range_ie_u32__struct {
  uint32_t min_incl;
  uint32_t max_excl;

#ifdef __cplusplus
  inline bool is_empty() const;
  inline bool equals(wuffs_base__range_ie_u32__struct s) const;
  inline wuffs_base__range_ie_u32__struct intersect(
      wuffs_base__range_ie_u32__struct s) const;
  inline wuffs_base__range_ie_u32__struct unite(
      wuffs_base__range_ie_u32__struct s) const;
  inline bool contains(uint32_t x) const;
  inline bool contains_range(wuffs_base__range_ie_u32__struct s) const;
  inline uint32_t length() const;
#endif  // __cplusplus

} wuffs_base__range_ie_u32;

static inline wuffs_base__range_ie_u32  //
wuffs_base__empty_range_ie_u32(void) {
  wuffs_base__range_ie_u32 ret;
  ret.min_incl = 0;
  ret.max_excl = 0;
  return ret;
}

static inline wuffs_base__range_ie_u32  //
wuffs_base__make_range_ie_u32(uint32_t min_incl, uint32_t max_excl) {
  wuffs_base__range_ie_u32 ret;
  ret.min_incl = min_incl;
  ret.max_excl = max_excl;
  return ret;
}

static inline bool  //
wuffs_base__range_ie_u32__is_empty(const wuffs_base__range_ie_u32* r) {
  return r->min_incl >= r->max_excl;
}

static inline bool  //
wuffs_base__range_ie_u32__equals(const wuffs_base__range_ie_u32* r,
                                 wuffs_base__range_ie_u32 s) {
  return (r->min_incl == s.min_incl && r->max_excl == s.max_excl) ||
         (wuffs_base__range_ie_u32__is_empty(r) &&
          wuffs_base__range_ie_u32__is_empty(&s));
}

static inline wuffs_base__range_ie_u32  //
wuffs_base__range_ie_u32__intersect(const wuffs_base__range_ie_u32* r,
                                    wuffs_base__range_ie_u32 s) {
  wuffs_base__range_ie_u32 t;
  t.min_incl = wuffs_base__u32__max(r->min_incl, s.min_incl);
  t.max_excl = wuffs_base__u32__min(r->max_excl, s.max_excl);
  return t;
}

static inline wuffs_base__range_ie_u32  //
wuffs_base__range_ie_u32__unite(const wuffs_base__range_ie_u32* r,
                                wuffs_base__range_ie_u32 s) {
  if (wuffs_base__range_ie_u32__is_empty(r)) {
    return s;
  }
  if (wuffs_base__range_ie_u32__is_empty(&s)) {
    return *r;
  }
  wuffs_base__range_ie_u32 t;
  t.min_incl = wuffs_base__u32__min(r->min_incl, s.min_incl);
  t.max_excl = wuffs_base__u32__max(r->max_excl, s.max_excl);
  return t;
}

static inline bool  //
wuffs_base__range_ie_u32__contains(const wuffs_base__range_ie_u32* r,
                                   uint32_t x) {
  return (r->min_incl <= x) && (x < r->max_excl);
}

static inline bool  //
wuffs_base__range_ie_u32__contains_range(const wuffs_base__range_ie_u32* r,
                                         wuffs_base__range_ie_u32 s) {
  return wuffs_base__range_ie_u32__equals(
      &s, wuffs_base__range_ie_u32__intersect(r, s));
}

static inline uint32_t  //
wuffs_base__range_ie_u32__length(const wuffs_base__range_ie_u32* r) {
  return wuffs_base__u32__sat_sub(r->max_excl, r->min_incl);
}

#ifdef __cplusplus

inline bool  //
wuffs_base__range_ie_u32::is_empty() const {
  return wuffs_base__range_ie_u32__is_empty(this);
}

inline bool  //
wuffs_base__range_ie_u32::equals(wuffs_base__range_ie_u32 s) const {
  return wuffs_base__range_ie_u32__equals(this, s);
}

inline wuffs_base__range_ie_u32  //
wuffs_base__range_ie_u32::intersect(wuffs_base__range_ie_u32 s) const {
  return wuffs_base__range_ie_u32__intersect(this, s);
}

inline wuffs_base__range_ie_u32  //
wuffs_base__range_ie_u32::unite(wuffs_base__range_ie_u32 s) const {
  return wuffs_base__range_ie_u32__unite(this, s);
}

inline bool  //
wuffs_base__range_ie_u32::contains(uint32_t x) const {
  return wuffs_base__range_ie_u32__contains(this, x);
}

inline bool  //
wuffs_base__range_ie_u32::contains_range(wuffs_base__range_ie_u32 s) const {
  return wuffs_base__range_ie_u32__contains_range(this, s);
}

inline uint32_t  //
wuffs_base__range_ie_u32::length() const {
  return wuffs_base__range_ie_u32__length(this);
}

#endif  // __cplusplus

// --------

typedef struct wuffs_base__range_ii_u64__struct {
  uint64_t min_incl;
  uint64_t max_incl;

#ifdef __cplusplus
  inline bool is_empty() const;
  inline bool equals(wuffs_base__range_ii_u64__struct s) const;
  inline wuffs_base__range_ii_u64__struct intersect(
      wuffs_base__range_ii_u64__struct s) const;
  inline wuffs_base__range_ii_u64__struct unite(
      wuffs_base__range_ii_u64__struct s) const;
  inline bool contains(uint64_t x) const;
  inline bool contains_range(wuffs_base__range_ii_u64__struct s) const;
#endif  // __cplusplus

} wuffs_base__range_ii_u64;

static inline wuffs_base__range_ii_u64  //
wuffs_base__empty_range_ii_u64(void) {
  wuffs_base__range_ii_u64 ret;
  ret.min_incl = 0;
  ret.max_incl = 0;
  return ret;
}

static inline wuffs_base__range_ii_u64  //
wuffs_base__make_range_ii_u64(uint64_t min_incl, uint64_t max_incl) {
  wuffs_base__range_ii_u64 ret;
  ret.min_incl = min_incl;
  ret.max_incl = max_incl;
  return ret;
}

static inline bool  //
wuffs_base__range_ii_u64__is_empty(const wuffs_base__range_ii_u64* r) {
  return r->min_incl > r->max_incl;
}

static inline bool  //
wuffs_base__range_ii_u64__equals(const wuffs_base__range_ii_u64* r,
                                 wuffs_base__range_ii_u64 s) {
  return (r->min_incl == s.min_incl && r->max_incl == s.max_incl) ||
         (wuffs_base__range_ii_u64__is_empty(r) &&
          wuffs_base__range_ii_u64__is_empty(&s));
}

static inline wuffs_base__range_ii_u64  //
wuffs_base__range_ii_u64__intersect(const wuffs_base__range_ii_u64* r,
                                    wuffs_base__range_ii_u64 s) {
  wuffs_base__range_ii_u64 t;
  t.min_incl = wuffs_base__u64__max(r->min_incl, s.min_incl);
  t.max_incl = wuffs_base__u64__min(r->max_incl, s.max_incl);
  return t;
}

static inline wuffs_base__range_ii_u64  //
wuffs_base__range_ii_u64__unite(const wuffs_base__range_ii_u64* r,
                                wuffs_base__range_ii_u64 s) {
  if (wuffs_base__range_ii_u64__is_empty(r)) {
    return s;
  }
  if (wuffs_base__range_ii_u64__is_empty(&s)) {
    return *r;
  }
  wuffs_base__range_ii_u64 t;
  t.min_incl = wuffs_base__u64__min(r->min_incl, s.min_incl);
  t.max_incl = wuffs_base__u64__max(r->max_incl, s.max_incl);
  return t;
}

static inline bool  //
wuffs_base__range_ii_u64__contains(const wuffs_base__range_ii_u64* r,
                                   uint64_t x) {
  return (r->min_incl <= x) && (x <= r->max_incl);
}

static inline bool  //
wuffs_base__range_ii_u64__contains_range(const wuffs_base__range_ii_u64* r,
                                         wuffs_base__range_ii_u64 s) {
  return wuffs_base__range_ii_u64__equals(
      &s, wuffs_base__range_ii_u64__intersect(r, s));
}

#ifdef __cplusplus

inline bool  //
wuffs_base__range_ii_u64::is_empty() const {
  return wuffs_base__range_ii_u64__is_empty(this);
}

inline bool  //
wuffs_base__range_ii_u64::equals(wuffs_base__range_ii_u64 s) const {
  return wuffs_base__range_ii_u64__equals(this, s);
}

inline wuffs_base__range_ii_u64  //
wuffs_base__range_ii_u64::intersect(wuffs_base__range_ii_u64 s) const {
  return wuffs_base__range_ii_u64__intersect(this, s);
}

inline wuffs_base__range_ii_u64  //
wuffs_base__range_ii_u64::unite(wuffs_base__range_ii_u64 s) const {
  return wuffs_base__range_ii_u64__unite(this, s);
}

inline bool  //
wuffs_base__range_ii_u64::contains(uint64_t x) const {
  return wuffs_base__range_ii_u64__contains(this, x);
}

inline bool  //
wuffs_base__range_ii_u64::contains_range(wuffs_base__range_ii_u64 s) const {
  return wuffs_base__range_ii_u64__contains_range(this, s);
}

#endif  // __cplusplus

// --------

typedef struct wuffs_base__range_ie_u64__struct {
  uint64_t min_incl;
  uint64_t max_excl;

#ifdef __cplusplus
  inline bool is_empty() const;
  inline bool equals(wuffs_base__range_ie_u64__struct s) const;
  inline wuffs_base__range_ie_u64__struct intersect(
      wuffs_base__range_ie_u64__struct s) const;
  inline wuffs_base__range_ie_u64__struct unite(
      wuffs_base__range_ie_u64__struct s) const;
  inline bool contains(uint64_t x) const;
  inline bool contains_range(wuffs_base__range_ie_u64__struct s) const;
  inline uint64_t length() const;
#endif  // __cplusplus

} wuffs_base__range_ie_u64;

static inline wuffs_base__range_ie_u64  //
wuffs_base__empty_range_ie_u64(void) {
  wuffs_base__range_ie_u64 ret;
  ret.min_incl = 0;
  ret.max_excl = 0;
  return ret;
}

static inline wuffs_base__range_ie_u64  //
wuffs_base__make_range_ie_u64(uint64_t min_incl, uint64_t max_excl) {
  wuffs_base__range_ie_u64 ret;
  ret.min_incl = min_incl;
  ret.max_excl = max_excl;
  return ret;
}

static inline bool  //
wuffs_base__range_ie_u64__is_empty(const wuffs_base__range_ie_u64* r) {
  return r->min_incl >= r->max_excl;
}

static inline bool  //
wuffs_base__range_ie_u64__equals(const wuffs_base__range_ie_u64* r,
                                 wuffs_base__range_ie_u64 s) {
  return (r->min_incl == s.min_incl && r->max_excl == s.max_excl) ||
         (wuffs_base__range_ie_u64__is_empty(r) &&
          wuffs_base__range_ie_u64__is_empty(&s));
}

static inline wuffs_base__range_ie_u64  //
wuffs_base__range_ie_u64__intersect(const wuffs_base__range_ie_u64* r,
                                    wuffs_base__range_ie_u64 s) {
  wuffs_base__range_ie_u64 t;
  t.min_incl = wuffs_base__u64__max(r->min_incl, s.min_incl);
  t.max_excl = wuffs_base__u64__min(r->max_excl, s.max_excl);
  return t;
}

static inline wuffs_base__range_ie_u64  //
wuffs_base__range_ie_u64__unite(const wuffs_base__range_ie_u64* r,
                                wuffs_base__range_ie_u64 s) {
  if (wuffs_base__range_ie_u64__is_empty(r)) {
    return s;
  }
  if (wuffs_base__range_ie_u64__is_empty(&s)) {
    return *r;
  }
  wuffs_base__range_ie_u64 t;
  t.min_incl = wuffs_base__u64__min(r->min_incl, s.min_incl);
  t.max_excl = wuffs_base__u64__max(r->max_excl, s.max_excl);
  return t;
}

static inline bool  //
wuffs_base__range_ie_u64__contains(const wuffs_base__range_ie_u64* r,
                                   uint64_t x) {
  return (r->min_incl <= x) && (x < r->max_excl);
}

static inline bool  //
wuffs_base__range_ie_u64__contains_range(const wuffs_base__range_ie_u64* r,
                                         wuffs_base__range_ie_u64 s) {
  return wuffs_base__range_ie_u64__equals(
      &s, wuffs_base__range_ie_u64__intersect(r, s));
}

static inline uint64_t  //
wuffs_base__range_ie_u64__length(const wuffs_base__range_ie_u64* r) {
  return wuffs_base__u64__sat_sub(r->max_excl, r->min_incl);
}

#ifdef __cplusplus

inline bool  //
wuffs_base__range_ie_u64::is_empty() const {
  return wuffs_base__range_ie_u64__is_empty(this);
}

inline bool  //
wuffs_base__range_ie_u64::equals(wuffs_base__range_ie_u64 s) const {
  return wuffs_base__range_ie_u64__equals(this, s);
}

inline wuffs_base__range_ie_u64  //
wuffs_base__range_ie_u64::intersect(wuffs_base__range_ie_u64 s) const {
  return wuffs_base__range_ie_u64__intersect(this, s);
}

inline wuffs_base__range_ie_u64  //
wuffs_base__range_ie_u64::unite(wuffs_base__range_ie_u64 s) const {
  return wuffs_base__range_ie_u64__unite(this, s);
}

inline bool  //
wuffs_base__range_ie_u64::contains(uint64_t x) const {
  return wuffs_base__range_ie_u64__contains(this, x);
}

inline bool  //
wuffs_base__range_ie_u64::contains_range(wuffs_base__range_ie_u64 s) const {
  return wuffs_base__range_ie_u64__contains_range(this, s);
}

inline uint64_t  //
wuffs_base__range_ie_u64::length() const {
  return wuffs_base__range_ie_u64__length(this);
}

#endif  // __cplusplus

// --------

typedef struct wuffs_base__rect_ii_u32__struct {
  uint32_t min_incl_x;
  uint32_t min_incl_y;
  uint32_t max_incl_x;
  uint32_t max_incl_y;

#ifdef __cplusplus
  inline bool is_empty() const;
  inline bool equals(wuffs_base__rect_ii_u32__struct s) const;
  inline wuffs_base__rect_ii_u32__struct intersect(
      wuffs_base__rect_ii_u32__struct s) const;
  inline wuffs_base__rect_ii_u32__struct unite(
      wuffs_base__rect_ii_u32__struct s) const;
  inline bool contains(uint32_t x, uint32_t y) const;
  inline bool contains_rect(wuffs_base__rect_ii_u32__struct s) const;
#endif  // __cplusplus

} wuffs_base__rect_ii_u32;

static inline wuffs_base__rect_ii_u32  //
wuffs_base__empty_rect_ii_u32(void) {
  wuffs_base__rect_ii_u32 ret;
  ret.min_incl_x = 0;
  ret.min_incl_y = 0;
  ret.max_incl_x = 0;
  ret.max_incl_y = 0;
  return ret;
}

static inline wuffs_base__rect_ii_u32  //
wuffs_base__make_rect_ii_u32(uint32_t min_incl_x,
                             uint32_t min_incl_y,
                             uint32_t max_incl_x,
                             uint32_t max_incl_y) {
  wuffs_base__rect_ii_u32 ret;
  ret.min_incl_x = min_incl_x;
  ret.min_incl_y = min_incl_y;
  ret.max_incl_x = max_incl_x;
  ret.max_incl_y = max_incl_y;
  return ret;
}

static inline bool  //
wuffs_base__rect_ii_u32__is_empty(const wuffs_base__rect_ii_u32* r) {
  return (r->min_incl_x > r->max_incl_x) || (r->min_incl_y > r->max_incl_y);
}

static inline bool  //
wuffs_base__rect_ii_u32__equals(const wuffs_base__rect_ii_u32* r,
                                wuffs_base__rect_ii_u32 s) {
  return (r->min_incl_x == s.min_incl_x && r->min_incl_y == s.min_incl_y &&
          r->max_incl_x == s.max_incl_x && r->max_incl_y == s.max_incl_y) ||
         (wuffs_base__rect_ii_u32__is_empty(r) &&
          wuffs_base__rect_ii_u32__is_empty(&s));
}

static inline wuffs_base__rect_ii_u32  //
wuffs_base__rect_ii_u32__intersect(const wuffs_base__rect_ii_u32* r,
                                   wuffs_base__rect_ii_u32 s) {
  wuffs_base__rect_ii_u32 t;
  t.min_incl_x = wuffs_base__u32__max(r->min_incl_x, s.min_incl_x);
  t.min_incl_y = wuffs_base__u32__max(r->min_incl_y, s.min_incl_y);
  t.max_incl_x = wuffs_base__u32__min(r->max_incl_x, s.max_incl_x);
  t.max_incl_y = wuffs_base__u32__min(r->max_incl_y, s.max_incl_y);
  return t;
}

static inline wuffs_base__rect_ii_u32  //
wuffs_base__rect_ii_u32__unite(const wuffs_base__rect_ii_u32* r,
                               wuffs_base__rect_ii_u32 s) {
  if (wuffs_base__rect_ii_u32__is_empty(r)) {
    return s;
  }
  if (wuffs_base__rect_ii_u32__is_empty(&s)) {
    return *r;
  }
  wuffs_base__rect_ii_u32 t;
  t.min_incl_x = wuffs_base__u32__min(r->min_incl_x, s.min_incl_x);
  t.min_incl_y = wuffs_base__u32__min(r->min_incl_y, s.min_incl_y);
  t.max_incl_x = wuffs_base__u32__max(r->max_incl_x, s.max_incl_x);
  t.max_incl_y = wuffs_base__u32__max(r->max_incl_y, s.max_incl_y);
  return t;
}

static inline bool  //
wuffs_base__rect_ii_u32__contains(const wuffs_base__rect_ii_u32* r,
                                  uint32_t x,
                                  uint32_t y) {
  return (r->min_incl_x <= x) && (x <= r->max_incl_x) && (r->min_incl_y <= y) &&
         (y <= r->max_incl_y);
}

static inline bool  //
wuffs_base__rect_ii_u32__contains_rect(const wuffs_base__rect_ii_u32* r,
                                       wuffs_base__rect_ii_u32 s) {
  return wuffs_base__rect_ii_u32__equals(
      &s, wuffs_base__rect_ii_u32__intersect(r, s));
}

#ifdef __cplusplus

inline bool  //
wuffs_base__rect_ii_u32::is_empty() const {
  return wuffs_base__rect_ii_u32__is_empty(this);
}

inline bool  //
wuffs_base__rect_ii_u32::equals(wuffs_base__rect_ii_u32 s) const {
  return wuffs_base__rect_ii_u32__equals(this, s);
}

inline wuffs_base__rect_ii_u32  //
wuffs_base__rect_ii_u32::intersect(wuffs_base__rect_ii_u32 s) const {
  return wuffs_base__rect_ii_u32__intersect(this, s);
}

inline wuffs_base__rect_ii_u32  //
wuffs_base__rect_ii_u32::unite(wuffs_base__rect_ii_u32 s) const {
  return wuffs_base__rect_ii_u32__unite(this, s);
}

inline bool  //
wuffs_base__rect_ii_u32::contains(uint32_t x, uint32_t y) const {
  return wuffs_base__rect_ii_u32__contains(this, x, y);
}

inline bool  //
wuffs_base__rect_ii_u32::contains_rect(wuffs_base__rect_ii_u32 s) const {
  return wuffs_base__rect_ii_u32__contains_rect(this, s);
}

#endif  // __cplusplus

// --------

typedef struct wuffs_base__rect_ie_u32__struct {
  uint32_t min_incl_x;
  uint32_t min_incl_y;
  uint32_t max_excl_x;
  uint32_t max_excl_y;

#ifdef __cplusplus
  inline bool is_empty() const;
  inline bool equals(wuffs_base__rect_ie_u32__struct s) const;
  inline wuffs_base__rect_ie_u32__struct intersect(
      wuffs_base__rect_ie_u32__struct s) const;
  inline wuffs_base__rect_ie_u32__struct unite(
      wuffs_base__rect_ie_u32__struct s) const;
  inline bool contains(uint32_t x, uint32_t y) const;
  inline bool contains_rect(wuffs_base__rect_ie_u32__struct s) const;
  inline uint32_t width() const;
  inline uint32_t height() const;
#endif  // __cplusplus

} wuffs_base__rect_ie_u32;

static inline wuffs_base__rect_ie_u32  //
wuffs_base__empty_rect_ie_u32(void) {
  wuffs_base__rect_ie_u32 ret;
  ret.min_incl_x = 0;
  ret.min_incl_y = 0;
  ret.max_excl_x = 0;
  ret.max_excl_y = 0;
  return ret;
}

static inline wuffs_base__rect_ie_u32  //
wuffs_base__make_rect_ie_u32(uint32_t min_incl_x,
                             uint32_t min_incl_y,
                             uint32_t max_excl_x,
                             uint32_t max_excl_y) {
  wuffs_base__rect_ie_u32 ret;
  ret.min_incl_x = min_incl_x;
  ret.min_incl_y = min_incl_y;
  ret.max_excl_x = max_excl_x;
  ret.max_excl_y = max_excl_y;
  return ret;
}

static inline bool  //
wuffs_base__rect_ie_u32__is_empty(const wuffs_base__rect_ie_u32* r) {
  return (r->min_incl_x >= r->max_excl_x) || (r->min_incl_y >= r->max_excl_y);
}

static inline bool  //
wuffs_base__rect_ie_u32__equals(const wuffs_base__rect_ie_u32* r,
                                wuffs_base__rect_ie_u32 s) {
  return (r->min_incl_x == s.min_incl_x && r->min_incl_y == s.min_incl_y &&
          r->max_excl_x == s.max_excl_x && r->max_excl_y == s.max_excl_y) ||
         (wuffs_base__rect_ie_u32__is_empty(r) &&
          wuffs_base__rect_ie_u32__is_empty(&s));
}

static inline wuffs_base__rect_ie_u32  //
wuffs_base__rect_ie_u32__intersect(const wuffs_base__rect_ie_u32* r,
                                   wuffs_base__rect_ie_u32 s) {
  wuffs_base__rect_ie_u32 t;
  t.min_incl_x = wuffs_base__u32__max(r->min_incl_x, s.min_incl_x);
  t.min_incl_y = wuffs_base__u32__max(r->min_incl_y, s.min_incl_y);
  t.max_excl_x = wuffs_base__u32__min(r->max_excl_x, s.max_excl_x);
  t.max_excl_y = wuffs_base__u32__min(r->max_excl_y, s.max_excl_y);
  return t;
}

static inline wuffs_base__rect_ie_u32  //
wuffs_base__rect_ie_u32__unite(const wuffs_base__rect_ie_u32* r,
                               wuffs_base__rect_ie_u32 s) {
  if (wuffs_base__rect_ie_u32__is_empty(r)) {
    return s;
  }
  if (wuffs_base__rect_ie_u32__is_empty(&s)) {
    return *r;
  }
  wuffs_base__rect_ie_u32 t;
  t.min_incl_x = wuffs_base__u32__min(r->min_incl_x, s.min_incl_x);
  t.min_incl_y = wuffs_base__u32__min(r->min_incl_y, s.min_incl_y);
  t.max_excl_x = wuffs_base__u32__max(r->max_excl_x, s.max_excl_x);
  t.max_excl_y = wuffs_base__u32__max(r->max_excl_y, s.max_excl_y);
  return t;
}

static inline bool  //
wuffs_base__rect_ie_u32__contains(const wuffs_base__rect_ie_u32* r,
                                  uint32_t x,
                                  uint32_t y) {
  return (r->min_incl_x <= x) && (x < r->max_excl_x) && (r->min_incl_y <= y) &&
         (y < r->max_excl_y);
}

static inline bool  //
wuffs_base__rect_ie_u32__contains_rect(const wuffs_base__rect_ie_u32* r,
                                       wuffs_base__rect_ie_u32 s) {
  return wuffs_base__rect_ie_u32__equals(
      &s, wuffs_base__rect_ie_u32__intersect(r, s));
}

static inline uint32_t  //
wuffs_base__rect_ie_u32__width(const wuffs_base__rect_ie_u32* r) {
  return wuffs_base__u32__sat_sub(r->max_excl_x, r->min_incl_x);
}

static inline uint32_t  //
wuffs_base__rect_ie_u32__height(const wuffs_base__rect_ie_u32* r) {
  return wuffs_base__u32__sat_sub(r->max_excl_y, r->min_incl_y);
}

#ifdef __cplusplus

inline bool  //
wuffs_base__rect_ie_u32::is_empty() const {
  return wuffs_base__rect_ie_u32__is_empty(this);
}

inline bool  //
wuffs_base__rect_ie_u32::equals(wuffs_base__rect_ie_u32 s) const {
  return wuffs_base__rect_ie_u32__equals(this, s);
}

inline wuffs_base__rect_ie_u32  //
wuffs_base__rect_ie_u32::intersect(wuffs_base__rect_ie_u32 s) const {
  return wuffs_base__rect_ie_u32__intersect(this, s);
}

inline wuffs_base__rect_ie_u32  //
wuffs_base__rect_ie_u32::unite(wuffs_base__rect_ie_u32 s) const {
  return wuffs_base__rect_ie_u32__unite(this, s);
}

inline bool  //
wuffs_base__rect_ie_u32::contains(uint32_t x, uint32_t y) const {
  return wuffs_base__rect_ie_u32__contains(this, x, y);
}

inline bool  //
wuffs_base__rect_ie_u32::contains_rect(wuffs_base__rect_ie_u32 s) const {
  return wuffs_base__rect_ie_u32__contains_rect(this, s);
}

inline uint32_t  //
wuffs_base__rect_ie_u32::width() const {
  return wuffs_base__rect_ie_u32__width(this);
}

inline uint32_t  //
wuffs_base__rect_ie_u32::height() const {
  return wuffs_base__rect_ie_u32__height(this);
}

#endif  // __cplusplus

// ---------------- More Information

// wuffs_base__more_information holds additional fields, typically when a Wuffs
// method returns a [note status](/doc/note/statuses.md).
//
// The flavor field follows the base38 namespace
// convention](/doc/note/base38-and-fourcc.md). The other fields' semantics
// depends on the flavor.
typedef struct wuffs_base__more_information__struct {
  uint32_t flavor;
  uint32_t w;
  uint64_t x;
  uint64_t y;
  uint64_t z;

#ifdef __cplusplus
  inline void set(uint32_t flavor_arg,
                  uint32_t w_arg,
                  uint64_t x_arg,
                  uint64_t y_arg,
                  uint64_t z_arg);
  inline uint32_t io_redirect__fourcc() const;
  inline wuffs_base__range_ie_u64 io_redirect__range() const;
  inline uint64_t io_seek__position() const;
  inline uint32_t metadata__fourcc() const;
  inline wuffs_base__range_ie_u64 metadata_raw_passthrough__range() const;
  inline int32_t metadata_parsed__chrm(uint32_t component) const;
  inline uint32_t metadata_parsed__gama() const;
  inline uint32_t metadata_parsed__srgb() const;
#endif  // __cplusplus

} wuffs_base__more_information;

#define WUFFS_BASE__MORE_INFORMATION__FLAVOR__IO_REDIRECT 1
#define WUFFS_BASE__MORE_INFORMATION__FLAVOR__IO_SEEK 2
#define WUFFS_BASE__MORE_INFORMATION__FLAVOR__METADATA_RAW_PASSTHROUGH 3
#define WUFFS_BASE__MORE_INFORMATION__FLAVOR__METADATA_RAW_TRANSFORM 4
#define WUFFS_BASE__MORE_INFORMATION__FLAVOR__METADATA_PARSED 5

static inline wuffs_base__more_information  //
wuffs_base__empty_more_information(void) {
  wuffs_base__more_information ret;
  ret.flavor = 0;
  ret.w = 0;
  ret.x = 0;
  ret.y = 0;
  ret.z = 0;
  return ret;
}

static inline void  //
wuffs_base__more_information__set(wuffs_base__more_information* m,
                                  uint32_t flavor,
                                  uint32_t w,
                                  uint64_t x,
                                  uint64_t y,
                                  uint64_t z) {
  if (!m) {
    return;
  }
  m->flavor = flavor;
  m->w = w;
  m->x = x;
  m->y = y;
  m->z = z;
}

static inline uint32_t  //
wuffs_base__more_information__io_redirect__fourcc(
    const wuffs_base__more_information* m) {
  return m->w;
}

static inline wuffs_base__range_ie_u64  //
wuffs_base__more_information__io_redirect__range(
    const wuffs_base__more_information* m) {
  wuffs_base__range_ie_u64 ret;
  ret.min_incl = m->y;
  ret.max_excl = m->z;
  return ret;
}

static inline uint64_t  //
wuffs_base__more_information__io_seek__position(
    const wuffs_base__more_information* m) {
  return m->x;
}

static inline uint32_t  //
wuffs_base__more_information__metadata__fourcc(
    const wuffs_base__more_information* m) {
  return m->w;
}

static inline wuffs_base__range_ie_u64  //
wuffs_base__more_information__metadata_raw_passthrough__range(
    const wuffs_base__more_information* m) {
  wuffs_base__range_ie_u64 ret;
  ret.min_incl = m->y;
  ret.max_excl = m->z;
  return ret;
}

#define WUFFS_BASE__MORE_INFORMATION__METADATA_PARSED__CHRM__WHITE_X 0
#define WUFFS_BASE__MORE_INFORMATION__METADATA_PARSED__CHRM__WHITE_Y 1
#define WUFFS_BASE__MORE_INFORMATION__METADATA_PARSED__CHRM__RED_X 2
#define WUFFS_BASE__MORE_INFORMATION__METADATA_PARSED__CHRM__RED_Y 3
#define WUFFS_BASE__MORE_INFORMATION__METADATA_PARSED__CHRM__GREEN_X 4
#define WUFFS_BASE__MORE_INFORMATION__METADATA_PARSED__CHRM__GREEN_Y 5
#define WUFFS_BASE__MORE_INFORMATION__METADATA_PARSED__CHRM__BLUE_X 6
#define WUFFS_BASE__MORE_INFORMATION__METADATA_PARSED__CHRM__BLUE_Y 7

// wuffs_base__more_information__metadata_parsed__chrm returns chromaticity
// values (scaled by 100000) like the PNG "cHRM" chunk. For example, the sRGB
// color space corresponds to:
//  - ETC__CHRM__WHITE_X 31270
//  - ETC__CHRM__WHITE_Y 32900
//  - ETC__CHRM__RED_X   64000
//  - ETC__CHRM__RED_Y   33000
//  - ETC__CHRM__GREEN_X 30000
//  - ETC__CHRM__GREEN_Y 60000
//  - ETC__CHRM__BLUE_X  15000
//  - ETC__CHRM__BLUE_Y   6000
//
// See
// https://ciechanow.ski/color-spaces/#chromaticity-and-white-point-coordinates
static inline int32_t  //
wuffs_base__more_information__metadata_parsed__chrm(
    const wuffs_base__more_information* m,
    uint32_t component) {
  // After the flavor and the w field (holding a FourCC), a
  // wuffs_base__more_information holds 24 bytes of data in three uint64_t
  // typed fields (x, y and z). We pack the eight chromaticity values (wx, wy,
  // rx, ..., by), basically int24_t values, into 24 bytes like this:
  //  -    LSB                 MSB
  //  - x: wx wx wx wy wy wy rx rx
  //  - y: rx ry ry ry gx gx gx gy
  //  - z: gy gy bx bx bx by by by
  uint32_t u = 0;
  switch (component & 7) {
    case 0:
      u = ((uint32_t)(m->x >> 0));
      break;
    case 1:
      u = ((uint32_t)(m->x >> 24));
      break;
    case 2:
      u = ((uint32_t)((m->x >> 48) | (m->y << 16)));
      break;
    case 3:
      u = ((uint32_t)(m->y >> 8));
      break;
    case 4:
      u = ((uint32_t)(m->y >> 32));
      break;
    case 5:
      u = ((uint32_t)((m->y >> 56) | (m->z << 8)));
      break;
    case 6:
      u = ((uint32_t)(m->z >> 16));
      break;
    case 7:
      u = ((uint32_t)(m->z >> 40));
      break;
  }
  // The left-right shifts sign-extend from 24-bit to 32-bit integers.
  return ((int32_t)(u << 8)) >> 8;
}

// wuffs_base__more_information__metadata_parsed__gama returns inverse gamma
// correction values (scaled by 100000) like the PNG "gAMA" chunk. For example,
// for gamma = 2.2, this returns 45455 (approximating 100000 / 2.2).
static inline uint32_t  //
wuffs_base__more_information__metadata_parsed__gama(
    const wuffs_base__more_information* m) {
  return ((uint32_t)(m->x));
}

#define WUFFS_BASE__SRGB_RENDERING_INTENT__PERCEPTUAL 0
#define WUFFS_BASE__SRGB_RENDERING_INTENT__RELATIVE_COLORIMETRIC 1
#define WUFFS_BASE__SRGB_RENDERING_INTENT__SATURATION 2
#define WUFFS_BASE__SRGB_RENDERING_INTENT__ABSOLUTE_COLORIMETRIC 3

// wuffs_base__more_information__metadata_parsed__srgb returns the sRGB
// rendering intent like the PNG "sRGB" chunk.
static inline uint32_t  //
wuffs_base__more_information__metadata_parsed__srgb(
    const wuffs_base__more_information* m) {
  return m->x & 3;
}

#ifdef __cplusplus

inline void  //
wuffs_base__more_information::set(uint32_t flavor_arg,
                                  uint32_t w_arg,
                                  uint64_t x_arg,
                                  uint64_t y_arg,
                                  uint64_t z_arg) {
  wuffs_base__more_information__set(this, flavor_arg, w_arg, x_arg, y_arg,
                                    z_arg);
}

inline uint32_t  //
wuffs_base__more_information::io_redirect__fourcc() const {
  return wuffs_base__more_information__io_redirect__fourcc(this);
}

inline wuffs_base__range_ie_u64  //
wuffs_base__more_information::io_redirect__range() const {
  return wuffs_base__more_information__io_redirect__range(this);
}

inline uint64_t  //
wuffs_base__more_information::io_seek__position() const {
  return wuffs_base__more_information__io_seek__position(this);
}

inline uint32_t  //
wuffs_base__more_information::metadata__fourcc() const {
  return wuffs_base__more_information__metadata__fourcc(this);
}

inline wuffs_base__range_ie_u64  //
wuffs_base__more_information::metadata_raw_passthrough__range() const {
  return wuffs_base__more_information__metadata_raw_passthrough__range(this);
}

inline int32_t  //
wuffs_base__more_information::metadata_parsed__chrm(uint32_t component) const {
  return wuffs_base__more_information__metadata_parsed__chrm(this, component);
}

inline uint32_t  //
wuffs_base__more_information::metadata_parsed__gama() const {
  return wuffs_base__more_information__metadata_parsed__gama(this);
}

inline uint32_t  //
wuffs_base__more_information::metadata_parsed__srgb() const {
  return wuffs_base__more_information__metadata_parsed__srgb(this);
}

#endif  // __cplusplus

// ---------------- I/O
//
// See (/doc/note/io-input-output.md).

// wuffs_base__io_buffer_meta is the metadata for a wuffs_base__io_buffer's
// data.
typedef struct wuffs_base__io_buffer_meta__struct {
  size_t wi;     // Write index. Invariant: wi <= len.
  size_t ri;     // Read  index. Invariant: ri <= wi.
  uint64_t pos;  // Buffer position (relative to the start of stream).
  bool closed;   // No further writes are expected.
} wuffs_base__io_buffer_meta;

// wuffs_base__io_buffer is a 1-dimensional buffer (a pointer and length) plus
// additional metadata.
//
// A value with all fields zero is a valid, empty buffer.
typedef struct wuffs_base__io_buffer__struct {
  wuffs_base__slice_u8 data;
  wuffs_base__io_buffer_meta meta;

#ifdef __cplusplus
  inline bool is_valid() const;
  inline void compact();
  inline void compact_retaining(uint64_t history_retain_length);
  inline size_t reader_length() const;
  inline uint8_t* reader_pointer() const;
  inline uint64_t reader_position() const;
  inline wuffs_base__slice_u8 reader_slice() const;
  inline size_t writer_length() const;
  inline uint8_t* writer_pointer() const;
  inline uint64_t writer_position() const;
  inline wuffs_base__slice_u8 writer_slice() const;
#endif  // __cplusplus

} wuffs_base__io_buffer;

static inline wuffs_base__io_buffer  //
wuffs_base__make_io_buffer(wuffs_base__slice_u8 data,
                           wuffs_base__io_buffer_meta meta) {
  wuffs_base__io_buffer ret;
  ret.data = data;
  ret.meta = meta;
  return ret;
}

static inline wuffs_base__io_buffer_meta  //
wuffs_base__make_io_buffer_meta(size_t wi,
                                size_t ri,
                                uint64_t pos,
                                bool closed) {
  wuffs_base__io_buffer_meta ret;
  ret.wi = wi;
  ret.ri = ri;
  ret.pos = pos;
  ret.closed = closed;
  return ret;
}

static inline wuffs_base__io_buffer  //
wuffs_base__ptr_u8__reader(uint8_t* ptr, size_t len, bool closed) {
  wuffs_base__io_buffer ret;
  ret.data.ptr = ptr;
  ret.data.len = len;
  ret.meta.wi = len;
  ret.meta.ri = 0;
  ret.meta.pos = 0;
  ret.meta.closed = closed;
  return ret;
}

static inline wuffs_base__io_buffer  //
wuffs_base__ptr_u8__writer(uint8_t* ptr, size_t len) {
  wuffs_base__io_buffer ret;
  ret.data.ptr = ptr;
  ret.data.len = len;
  ret.meta.wi = 0;
  ret.meta.ri = 0;
  ret.meta.pos = 0;
  ret.meta.closed = false;
  return ret;
}

static inline wuffs_base__io_buffer  //
wuffs_base__slice_u8__reader(wuffs_base__slice_u8 s, bool closed) {
  wuffs_base__io_buffer ret;
  ret.data.ptr = s.ptr;
  ret.data.len = s.len;
  ret.meta.wi = s.len;
  ret.meta.ri = 0;
  ret.meta.pos = 0;
  ret.meta.closed = closed;
  return ret;
}

static inline wuffs_base__io_buffer  //
wuffs_base__slice_u8__writer(wuffs_base__slice_u8 s) {
  wuffs_base__io_buffer ret;
  ret.data.ptr = s.ptr;
  ret.data.len = s.len;
  ret.meta.wi = 0;
  ret.meta.ri = 0;
  ret.meta.pos = 0;
  ret.meta.closed = false;
  return ret;
}

static inline wuffs_base__io_buffer  //
wuffs_base__empty_io_buffer(void) {
  wuffs_base__io_buffer ret;
  ret.data.ptr = NULL;
  ret.data.len = 0;
  ret.meta.wi = 0;
  ret.meta.ri = 0;
  ret.meta.pos = 0;
  ret.meta.closed = false;
  return ret;
}

static inline wuffs_base__io_buffer_meta  //
wuffs_base__empty_io_buffer_meta(void) {
  wuffs_base__io_buffer_meta ret;
  ret.wi = 0;
  ret.ri = 0;
  ret.pos = 0;
  ret.closed = false;
  return ret;
}

static inline bool  //
wuffs_base__io_buffer__is_valid(const wuffs_base__io_buffer* buf) {
  if (buf) {
    if (buf->data.ptr) {
      return (buf->meta.ri <= buf->meta.wi) && (buf->meta.wi <= buf->data.len);
    } else {
      return (buf->meta.ri == 0) && (buf->meta.wi == 0) && (buf->data.len == 0);
    }
  }
  return false;
}

// wuffs_base__io_buffer__compact moves any written but unread bytes to the
// start of the buffer.
static inline void  //
wuffs_base__io_buffer__compact(wuffs_base__io_buffer* buf) {
  if (!buf || (buf->meta.ri == 0)) {
    return;
  }
  buf->meta.pos = wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri);
  size_t new_wi = buf->meta.wi - buf->meta.ri;
  if (new_wi != 0) {
    memmove(buf->data.ptr, buf->data.ptr + buf->meta.ri, new_wi);
  }
  buf->meta.wi = new_wi;
  buf->meta.ri = 0;
}

// wuffs_base__io_buffer__compact_retaining moves any written but unread bytes
// closer to the start of the buffer. It retains H bytes of history (the most
// recently read bytes), where H is min(buf->meta.ri, history_retain_length).
// It is therefore a no-op if history_retain_length is UINT64_MAX. A
// postcondition is that buf->meta.ri == H.
//
// wuffs_base__io_buffer__compact_retaining(0) is equivalent to
// wuffs_base__io_buffer__compact().
//
// For example, if buf started like this:
//
//        +--- ri = 3
//        v
//     abcdefgh??    len = 10, pos = 900
//             ^
//             +--- wi = 8
//
// Then, depending on history_retain_length, the resultant buf would be:
//
// HRL = 0     defgh?????    ri = 0    wi = 5    pos = 903
// HRL = 1     cdefgh????    ri = 1    wi = 6    pos = 902
// HRL = 2     bcdefgh???    ri = 2    wi = 7    pos = 901
// HRL = 3     abcdefgh??    ri = 3    wi = 8    pos = 900
// HRL = 4+    abcdefgh??    ri = 3    wi = 8    pos = 900
static inline void  //
wuffs_base__io_buffer__compact_retaining(wuffs_base__io_buffer* buf,
                                         uint64_t history_retain_length) {
  if (!buf || (buf->meta.ri == 0)) {
    return;
  }
  size_t old_ri = buf->meta.ri;
  size_t new_ri = (size_t)(wuffs_base__u64__min(old_ri, history_retain_length));
  size_t memmove_start = old_ri - new_ri;
  buf->meta.pos = wuffs_base__u64__sat_add(buf->meta.pos, memmove_start);
  size_t new_wi = buf->meta.wi - memmove_start;
  if ((new_wi != 0) && (memmove_start != 0)) {
    memmove(buf->data.ptr, buf->data.ptr + memmove_start, new_wi);
  }
  buf->meta.wi = new_wi;
  buf->meta.ri = new_ri;
}

static inline size_t  //
wuffs_base__io_buffer__reader_length(const wuffs_base__io_buffer* buf) {
  return buf ? buf->meta.wi - buf->meta.ri : 0;
}

static inline uint8_t*  //
wuffs_base__io_buffer__reader_pointer(const wuffs_base__io_buffer* buf) {
  return (buf && buf->data.ptr) ? (buf->data.ptr + buf->meta.ri) : NULL;
}

static inline uint64_t  //
wuffs_base__io_buffer__reader_position(const wuffs_base__io_buffer* buf) {
  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri) : 0;
}

static inline wuffs_base__slice_u8  //
wuffs_base__io_buffer__reader_slice(const wuffs_base__io_buffer* buf) {
  return (buf && buf->data.ptr)
             ? wuffs_base__make_slice_u8(buf->data.ptr + buf->meta.ri,
                                         buf->meta.wi - buf->meta.ri)
             : wuffs_base__empty_slice_u8();
}

static inline size_t  //
wuffs_base__io_buffer__writer_length(const wuffs_base__io_buffer* buf) {
  return buf ? buf->data.len - buf->meta.wi : 0;
}

static inline uint8_t*  //
wuffs_base__io_buffer__writer_pointer(const wuffs_base__io_buffer* buf) {
  return (buf && buf->data.ptr) ? (buf->data.ptr + buf->meta.wi) : NULL;
}

static inline uint64_t  //
wuffs_base__io_buffer__writer_position(const wuffs_base__io_buffer* buf) {
  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.wi) : 0;
}

static inline wuffs_base__slice_u8  //
wuffs_base__io_buffer__writer_slice(const wuffs_base__io_buffer* buf) {
  return (buf && buf->data.ptr)
             ? wuffs_base__make_slice_u8(buf->data.ptr + buf->meta.wi,
                                         buf->data.len - buf->meta.wi)
             : wuffs_base__empty_slice_u8();
}

#ifdef __cplusplus

inline bool  //
wuffs_base__io_buffer::is_valid() const {
  return wuffs_base__io_buffer__is_valid(this);
}

inline void  //
wuffs_base__io_buffer::compact() {
  wuffs_base__io_buffer__compact(this);
}

inline void  //
wuffs_base__io_buffer::compact_retaining(uint64_t history_retain_length) {
  wuffs_base__io_buffer__compact_retaining(this, history_retain_length);
}

inline size_t  //
wuffs_base__io_buffer::reader_length() const {
  return wuffs_base__io_buffer__reader_length(this);
}

inline uint8_t*  //
wuffs_base__io_buffer::reader_pointer() const {
  return wuffs_base__io_buffer__reader_pointer(this);
}

inline uint64_t  //
wuffs_base__io_buffer::reader_position() const {
  return wuffs_base__io_buffer__reader_position(this);
}

inline wuffs_base__slice_u8  //
wuffs_base__io_buffer::reader_slice() const {
  return wuffs_base__io_buffer__reader_slice(this);
}

inline size_t  //
wuffs_base__io_buffer::writer_length() const {
  return wuffs_base__io_buffer__writer_length(this);
}

inline uint8_t*  //
wuffs_base__io_buffer::writer_pointer() const {
  return wuffs_base__io_buffer__writer_pointer(this);
}

inline uint64_t  //
wuffs_base__io_buffer::writer_position() const {
  return wuffs_base__io_buffer__writer_position(this);
}

inline wuffs_base__slice_u8  //
wuffs_base__io_buffer::writer_slice() const {
  return wuffs_base__io_buffer__writer_slice(this);
}

#endif  // __cplusplus

// ---------------- Tokens

// wuffs_base__token is an element of a byte stream's tokenization.
//
// See https://github.com/google/wuffs/blob/main/doc/note/tokens.md
typedef struct wuffs_base__token__struct {
  uint64_t repr;

#ifdef __cplusplus
  inline int64_t value() const;
  inline int64_t value_extension() const;
  inline int64_t value_major() const;
  inline int64_t value_base_category() const;
  inline uint64_t value_minor() const;
  inline uint64_t value_base_detail() const;
  inline int64_t value_base_detail__sign_extended() const;
  inline bool continued() const;
  inline uint64_t length() const;
#endif  // __cplusplus

} wuffs_base__token;

static inline wuffs_base__token  //
wuffs_base__make_token(uint64_t repr) {
  wuffs_base__token ret;
  ret.repr = repr;
  return ret;
}

// --------

// clang-format off

// --------

#define WUFFS_BASE__TOKEN__LENGTH__MAX_INCL 0xFFFF

#define WUFFS_BASE__TOKEN__VALUE__SHIFT               17
#define WUFFS_BASE__TOKEN__VALUE_EXTENSION__SHIFT     17
#define WUFFS_BASE__TOKEN__VALUE_MAJOR__SHIFT         42
#define WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT         17
#define WUFFS_BASE__TOKEN__VALUE_BASE_CATEGORY__SHIFT 38
#define WUFFS_BASE__TOKEN__VALUE_BASE_DETAIL__SHIFT   17
#define WUFFS_BASE__TOKEN__CONTINUED__SHIFT           16
#define WUFFS_BASE__TOKEN__LENGTH__SHIFT               0

#define WUFFS_BASE__TOKEN__VALUE_EXTENSION__NUM_BITS  46

// --------

#define WUFFS_BASE__TOKEN__VBC__FILLER                  0
#define WUFFS_BASE__TOKEN__VBC__STRUCTURE               1
#define WUFFS_BASE__TOKEN__VBC__STRING                  2
#define WUFFS_BASE__TOKEN__VBC__UNICODE_CODE_POINT      3
#define WUFFS_BASE__TOKEN__VBC__LITERAL                 4
#define WUFFS_BASE__TOKEN__VBC__NUMBER                  5
#define WUFFS_BASE__TOKEN__VBC__INLINE_INTEGER_SIGNED   6
#define WUFFS_BASE__TOKEN__VBC__INLINE_INTEGER_UNSIGNED 7

// --------

#define WUFFS_BASE__TOKEN__VBD__FILLER__PUNCTUATION   0x00001
#define WUFFS_BASE__TOKEN__VBD__FILLER__COMMENT_BLOCK 0x00002
#define WUFFS_BASE__TOKEN__VBD__FILLER__COMMENT_LINE  0x00004

// COMMENT_ANY is a bit-wise or of COMMENT_BLOCK AND COMMENT_LINE.
#define WUFFS_BASE__TOKEN__VBD__FILLER__COMMENT_ANY   0x00006

// --------

#define WUFFS_BASE__TOKEN__VBD__STRUCTURE__PUSH      0x00001
#define WUFFS_BASE__TOKEN__VBD__STRUCTURE__POP       0x00002
#define WUFFS_BASE__TOKEN__VBD__STRUCTURE__FROM_NONE 0x00010
#define WUFFS_BASE__TOKEN__VBD__STRUCTURE__FROM_LIST 0x00020
#define WUFFS_BASE__TOKEN__VBD__STRUCTURE__FROM_DICT 0x00040
#define WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_NONE   0x01000
#define WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_LIST   0x02000
#define WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_DICT   0x04000

// --------

// DEFINITELY_FOO means that the destination bytes (and also the source bytes,
// for 1_DST_1_SRC_COPY) are in the FOO format. Definitely means that the lack
// of the bit means "maybe FOO". It does not necessarily mean "not FOO".
//
// CHAIN_ETC means that decoding the entire token chain forms a UTF-8 or ASCII
// string, not just this current token. CHAIN_ETC_UTF_8 therefore distinguishes
// Unicode (UTF-8) strings from byte strings. MUST means that the the token
// producer (e.g. parser) must verify this. SHOULD means that the token
// consumer (e.g. renderer) should verify this.
//
// When a CHAIN_ETC_UTF_8 bit is set, the parser must ensure that non-ASCII
// code points (with multi-byte UTF-8 encodings) do not straddle token
// boundaries. Checking UTF-8 validity can inspect each token separately.
//
// The lack of any particular bit is conservative: it is valid for all-ASCII
// strings, in a single- or multi-token chain, to have none of these bits set.
#define WUFFS_BASE__TOKEN__VBD__STRING__DEFINITELY_UTF_8      0x00001
#define WUFFS_BASE__TOKEN__VBD__STRING__CHAIN_MUST_BE_UTF_8   0x00002
#define WUFFS_BASE__TOKEN__VBD__STRING__CHAIN_SHOULD_BE_UTF_8 0x00004
#define WUFFS_BASE__TOKEN__VBD__STRING__DEFINITELY_ASCII      0x00010
#define WUFFS_BASE__TOKEN__VBD__STRING__CHAIN_MUST_BE_ASCII   0x00020
#define WUFFS_BASE__TOKEN__VBD__STRING__CHAIN_SHOULD_BE_ASCII 0x00040

// CONVERT_D_DST_S_SRC means that multiples of S source bytes (possibly padded)
// produces multiples of D destination bytes. For example,
// CONVERT_1_DST_4_SRC_BACKSLASH_X means a source like "\\x23\\x67\\xAB", where
// 12 src bytes encode 3 dst bytes.
//
// Post-processing may further transform those D destination bytes (e.g. treat
// "\\xFF" as the Unicode code point U+00FF instead of the byte 0xFF), but that
// is out of scope of this VBD's semantics.
//
// When src is the empty string, multiple conversion algorithms are applicable
// (so these bits are not necessarily mutually exclusive), all producing the
// same empty dst string.
#define WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_0_DST_1_SRC_DROP        0x00100
#define WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_1_DST_1_SRC_COPY        0x00200
#define WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_1_DST_2_SRC_HEXADECIMAL 0x00400
#define WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_1_DST_4_SRC_BACKSLASH_X 0x00800
#define WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_3_DST_4_SRC_BASE_64_STD 0x01000
#define WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_3_DST_4_SRC_BASE_64_URL 0x02000
#define WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_4_DST_5_SRC_ASCII_85    0x04000
#define WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_5_DST_8_SRC_BASE_32_HEX 0x08000
#define WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_5_DST_8_SRC_BASE_32_STD 0x10000

// --------

#define WUFFS_BASE__TOKEN__VBD__LITERAL__UNDEFINED 0x00001
#define WUFFS_BASE__TOKEN__VBD__LITERAL__NULL      0x00002
#define WUFFS_BASE__TOKEN__VBD__LITERAL__FALSE     0x00004
#define WUFFS_BASE__TOKEN__VBD__LITERAL__TRUE      0x00008

// --------

// For a source string of "123" or "0x9A", it is valid for a tokenizer to
// return any combination of:
//  - WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_FLOATING_POINT.
//  - WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_INTEGER_SIGNED.
//  - WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_INTEGER_UNSIGNED.
//
// For a source string of "+123" or "-0x9A", only the first two are valid.
//
// For a source string of "123.", only the first one is valid.
#define WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_FLOATING_POINT   0x00001
#define WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_INTEGER_SIGNED   0x00002
#define WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_INTEGER_UNSIGNED 0x00004

#define WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_NEG_INF 0x00010
#define WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_POS_INF 0x00020
#define WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_NEG_NAN 0x00040
#define WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_POS_NAN 0x00080

// The number 300 might be represented as "\x01\x2C", "\x2C\x01\x00\x00" or
// "300", which are big-endian, little-endian or text. For binary formats, the
// token length (after adjusting for FORMAT_IGNORE_ETC) discriminates
// e.g. u16 little-endian vs u32 little-endian.
#define WUFFS_BASE__TOKEN__VBD__NUMBER__FORMAT_BINARY_BIG_ENDIAN    0x00100
#define WUFFS_BASE__TOKEN__VBD__NUMBER__FORMAT_BINARY_LITTLE_ENDIAN 0x00200
#define WUFFS_BASE__TOKEN__VBD__NUMBER__FORMAT_TEXT                 0x00400

#define WUFFS_BASE__TOKEN__VBD__NUMBER__FORMAT_IGNORE_FIRST_BYTE    0x01000

// --------

// clang-format on

// --------

// wuffs_base__token__value returns the token's high 46 bits, sign-extended. A
// negative value means an extended token, non-negative means a simple token.
static inline int64_t  //
wuffs_base__token__value(const wuffs_base__token* t) {
  return ((int64_t)(t->repr)) >> WUFFS_BASE__TOKEN__VALUE__SHIFT;
}

// wuffs_base__token__value_extension returns a negative value if the token was
// not an extended token.
static inline int64_t  //
wuffs_base__token__value_extension(const wuffs_base__token* t) {
  return (~(int64_t)(t->repr)) >> WUFFS_BASE__TOKEN__VALUE_EXTENSION__SHIFT;
}

// wuffs_base__token__value_major returns a negative value if the token was not
// a simple token.
static inline int64_t  //
wuffs_base__token__value_major(const wuffs_base__token* t) {
  return ((int64_t)(t->repr)) >> WUFFS_BASE__TOKEN__VALUE_MAJOR__SHIFT;
}

// wuffs_base__token__value_base_category returns a negative value if the token
// was not a simple token.
static inline int64_t  //
wuffs_base__token__value_base_category(const wuffs_base__token* t) {
  return ((int64_t)(t->repr)) >> WUFFS_BASE__TOKEN__VALUE_BASE_CATEGORY__SHIFT;
}

static inline uint64_t  //
wuffs_base__token__value_minor(const wuffs_base__token* t) {
  return (t->repr >> WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) & 0x1FFFFFF;
}

static inline uint64_t  //
wuffs_base__token__value_base_detail(const wuffs_base__token* t) {
  return (t->repr >> WUFFS_BASE__TOKEN__VALUE_BASE_DETAIL__SHIFT) & 0x1FFFFF;
}

static inline int64_t  //
wuffs_base__token__value_base_detail__sign_extended(
    const wuffs_base__token* t) {
  // The VBD is 21 bits in the middle of t->repr. Left shift the high (64 - 21
  // - ETC__SHIFT) bits off, then right shift (sign-extending) back down.
  uint64_t u = t->repr << (43 - WUFFS_BASE__TOKEN__VALUE_BASE_DETAIL__SHIFT);
  return ((int64_t)u) >> 43;
}

static inline bool  //
wuffs_base__token__continued(const wuffs_base__token* t) {
  return t->repr & 0x10000;
}

static inline uint64_t  //
wuffs_base__token__length(const wuffs_base__token* t) {
  return (t->repr >> WUFFS_BASE__TOKEN__LENGTH__SHIFT) & 0xFFFF;
}

#ifdef __cplusplus

inline int64_t  //
wuffs_base__token::value() const {
  return wuffs_base__token__value(this);
}

inline int64_t  //
wuffs_base__token::value_extension() const {
  return wuffs_base__token__value_extension(this);
}

inline int64_t  //
wuffs_base__token::value_major() const {
  return wuffs_base__token__value_major(this);
}

inline int64_t  //
wuffs_base__token::value_base_category() const {
  return wuffs_base__token__value_base_category(this);
}

inline uint64_t  //
wuffs_base__token::value_minor() const {
  return wuffs_base__token__value_minor(this);
}

inline uint64_t  //
wuffs_base__token::value_base_detail() const {
  return wuffs_base__token__value_base_detail(this);
}

inline int64_t  //
wuffs_base__token::value_base_detail__sign_extended() const {
  return wuffs_base__token__value_base_detail__sign_extended(this);
}

inline bool  //
wuffs_base__token::continued() const {
  return wuffs_base__token__continued(this);
}

inline uint64_t  //
wuffs_base__token::length() const {
  return wuffs_base__token__length(this);
}

#endif  // __cplusplus

// --------

#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-qual"
#endif

static inline wuffs_base__token*  //
wuffs_base__strip_const_from_token_ptr(const wuffs_base__token* ptr) {
  return (wuffs_base__token*)ptr;
}

#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif

// --------

typedef WUFFS_BASE__SLICE(wuffs_base__token) wuffs_base__slice_token;

static inline wuffs_base__slice_token  //
wuffs_base__make_slice_token(wuffs_base__token* ptr, size_t len) {
  wuffs_base__slice_token ret;
  ret.ptr = ptr;
  ret.len = len;
  return ret;
}

static inline wuffs_base__slice_token  //
wuffs_base__empty_slice_token(void) {
  wuffs_base__slice_token ret;
  ret.ptr = NULL;
  ret.len = 0;
  return ret;
}

// --------

// wuffs_base__token_buffer_meta is the metadata for a
// wuffs_base__token_buffer's data.
typedef struct wuffs_base__token_buffer_meta__struct {
  size_t wi;     // Write index. Invariant: wi <= len.
  size_t ri;     // Read  index. Invariant: ri <= wi.
  uint64_t pos;  // Position of the buffer start relative to the stream start.
  bool closed;   // No further writes are expected.
} wuffs_base__token_buffer_meta;

// wuffs_base__token_buffer is a 1-dimensional buffer (a pointer and length)
// plus additional metadata.
//
// A value with all fields zero is a valid, empty buffer.
typedef struct wuffs_base__token_buffer__struct {
  wuffs_base__slice_token data;
  wuffs_base__token_buffer_meta meta;

#ifdef __cplusplus
  inline bool is_valid() const;
  inline void compact();
  inline void compact_retaining(uint64_t history_retain_length);
  inline uint64_t reader_length() const;
  inline wuffs_base__token* reader_pointer() const;
  inline wuffs_base__slice_token reader_slice() const;
  inline uint64_t reader_token_position() const;
  inline uint64_t writer_length() const;
  inline uint64_t writer_token_position() const;
  inline wuffs_base__token* writer_pointer() const;
  inline wuffs_base__slice_token writer_slice() const;
#endif  // __cplusplus

} wuffs_base__token_buffer;

static inline wuffs_base__token_buffer  //
wuffs_base__make_token_buffer(wuffs_base__slice_token data,
                              wuffs_base__token_buffer_meta meta) {
  wuffs_base__token_buffer ret;
  ret.data = data;
  ret.meta = meta;
  return ret;
}

static inline wuffs_base__token_buffer_meta  //
wuffs_base__make_token_buffer_meta(size_t wi,
                                   size_t ri,
                                   uint64_t pos,
                                   bool closed) {
  wuffs_base__token_buffer_meta ret;
  ret.wi = wi;
  ret.ri = ri;
  ret.pos = pos;
  ret.closed = closed;
  return ret;
}

static inline wuffs_base__token_buffer  //
wuffs_base__slice_token__reader(wuffs_base__slice_token s, bool closed) {
  wuffs_base__token_buffer ret;
  ret.data.ptr = s.ptr;
  ret.data.len = s.len;
  ret.meta.wi = s.len;
  ret.meta.ri = 0;
  ret.meta.pos = 0;
  ret.meta.closed = closed;
  return ret;
}

static inline wuffs_base__token_buffer  //
wuffs_base__slice_token__writer(wuffs_base__slice_token s) {
  wuffs_base__token_buffer ret;
  ret.data.ptr = s.ptr;
  ret.data.len = s.len;
  ret.meta.wi = 0;
  ret.meta.ri = 0;
  ret.meta.pos = 0;
  ret.meta.closed = false;
  return ret;
}

static inline wuffs_base__token_buffer  //
wuffs_base__empty_token_buffer(void) {
  wuffs_base__token_buffer ret;
  ret.data.ptr = NULL;
  ret.data.len = 0;
  ret.meta.wi = 0;
  ret.meta.ri = 0;
  ret.meta.pos = 0;
  ret.meta.closed = false;
  return ret;
}

static inline wuffs_base__token_buffer_meta  //
wuffs_base__empty_token_buffer_meta(void) {
  wuffs_base__token_buffer_meta ret;
  ret.wi = 0;
  ret.ri = 0;
  ret.pos = 0;
  ret.closed = false;
  return ret;
}

static inline bool  //
wuffs_base__token_buffer__is_valid(const wuffs_base__token_buffer* buf) {
  if (buf) {
    if (buf->data.ptr) {
      return (buf->meta.ri <= buf->meta.wi) && (buf->meta.wi <= buf->data.len);
    } else {
      return (buf->meta.ri == 0) && (buf->meta.wi == 0) && (buf->data.len == 0);
    }
  }
  return false;
}

// wuffs_base__token_buffer__compact moves any written but unread tokens to the
// start of the buffer.
static inline void  //
wuffs_base__token_buffer__compact(wuffs_base__token_buffer* buf) {
  if (!buf || (buf->meta.ri == 0)) {
    return;
  }
  buf->meta.pos = wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri);
  size_t new_wi = buf->meta.wi - buf->meta.ri;
  if (new_wi != 0) {
    memmove(buf->data.ptr, buf->data.ptr + buf->meta.ri,
            new_wi * sizeof(wuffs_base__token));
  }
  buf->meta.wi = new_wi;
  buf->meta.ri = 0;
}

// wuffs_base__token_buffer__compact_retaining moves any written but unread
// tokens closer to the start of the buffer. It retains H tokens of history
// (the most recently read tokens), where H is min(buf->meta.ri,
// history_retain_length). It is therefore a no-op if history_retain_length is
// UINT64_MAX. A postcondition is that buf->meta.ri == H.
//
// wuffs_base__token_buffer__compact_retaining(0) is equivalent to
// wuffs_base__token_buffer__compact().
//
// For example, if buf started like this:
//
//        +--- ri = 3
//        v
//     abcdefgh??    len = 10, pos = 900
//             ^
//             +--- wi = 8
//
// Then, depending on history_retain_length, the resultant buf would be:
//
// HRL = 0     defgh?????    ri = 0    wi = 5    pos = 903
// HRL = 1     cdefgh????    ri = 1    wi = 6    pos = 902
// HRL = 2     bcdefgh???    ri = 2    wi = 7    pos = 901
// HRL = 3     abcdefgh??    ri = 3    wi = 8    pos = 900
// HRL = 4+    abcdefgh??    ri = 3    wi = 8    pos = 900
static inline void  //
wuffs_base__token_buffer__compact_retaining(wuffs_base__token_buffer* buf,
                                            uint64_t history_retain_length) {
  if (!buf || (buf->meta.ri == 0)) {
    return;
  }
  size_t old_ri = buf->meta.ri;
  size_t new_ri = (size_t)(wuffs_base__u64__min(old_ri, history_retain_length));
  size_t memmove_start = old_ri - new_ri;
  buf->meta.pos = wuffs_base__u64__sat_add(buf->meta.pos, memmove_start);
  size_t new_wi = buf->meta.wi - memmove_start;
  if ((new_wi != 0) && (memmove_start != 0)) {
    memmove(buf->data.ptr, buf->data.ptr + memmove_start,
            new_wi * sizeof(wuffs_base__token));
  }
  buf->meta.wi = new_wi;
  buf->meta.ri = new_ri;
}

static inline uint64_t  //
wuffs_base__token_buffer__reader_length(const wuffs_base__token_buffer* buf) {
  return buf ? buf->meta.wi - buf->meta.ri : 0;
}

static inline wuffs_base__token*  //
wuffs_base__token_buffer__reader_pointer(const wuffs_base__token_buffer* buf) {
  return buf ? (buf->data.ptr + buf->meta.ri) : NULL;
}

static inline wuffs_base__slice_token  //
wuffs_base__token_buffer__reader_slice(const wuffs_base__token_buffer* buf) {
  return buf ? wuffs_base__make_slice_token(buf->data.ptr + buf->meta.ri,
                                            buf->meta.wi - buf->meta.ri)
             : wuffs_base__empty_slice_token();
}

static inline uint64_t  //
wuffs_base__token_buffer__reader_token_position(
    const wuffs_base__token_buffer* buf) {
  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri) : 0;
}

static inline uint64_t  //
wuffs_base__token_buffer__writer_length(const wuffs_base__token_buffer* buf) {
  return buf ? buf->data.len - buf->meta.wi : 0;
}

static inline wuffs_base__token*  //
wuffs_base__token_buffer__writer_pointer(const wuffs_base__token_buffer* buf) {
  return buf ? (buf->data.ptr + buf->meta.wi) : NULL;
}

static inline wuffs_base__slice_token  //
wuffs_base__token_buffer__writer_slice(const wuffs_base__token_buffer* buf) {
  return buf ? wuffs_base__make_slice_token(buf->data.ptr + buf->meta.wi,
                                            buf->data.len - buf->meta.wi)
             : wuffs_base__empty_slice_token();
}

static inline uint64_t  //
wuffs_base__token_buffer__writer_token_position(
    const wuffs_base__token_buffer* buf) {
  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.wi) : 0;
}

#ifdef __cplusplus

inline bool  //
wuffs_base__token_buffer::is_valid() const {
  return wuffs_base__token_buffer__is_valid(this);
}

inline void  //
wuffs_base__token_buffer::compact() {
  wuffs_base__token_buffer__compact(this);
}

inline void  //
wuffs_base__token_buffer::compact_retaining(uint64_t history_retain_length) {
  wuffs_base__token_buffer__compact_retaining(this, history_retain_length);
}

inline uint64_t  //
wuffs_base__token_buffer::reader_length() const {
  return wuffs_base__token_buffer__reader_length(this);
}

inline wuffs_base__token*  //
wuffs_base__token_buffer::reader_pointer() const {
  return wuffs_base__token_buffer__reader_pointer(this);
}

inline wuffs_base__slice_token  //
wuffs_base__token_buffer::reader_slice() const {
  return wuffs_base__token_buffer__reader_slice(this);
}

inline uint64_t  //
wuffs_base__token_buffer::reader_token_position() const {
  return wuffs_base__token_buffer__reader_token_position(this);
}

inline uint64_t  //
wuffs_base__token_buffer::writer_length() const {
  return wuffs_base__token_buffer__writer_length(this);
}

inline wuffs_base__token*  //
wuffs_base__token_buffer::writer_pointer() const {
  return wuffs_base__token_buffer__writer_pointer(this);
}

inline wuffs_base__slice_token  //
wuffs_base__token_buffer::writer_slice() const {
  return wuffs_base__token_buffer__writer_slice(this);
}

inline uint64_t  //
wuffs_base__token_buffer::writer_token_position() const {
  return wuffs_base__token_buffer__writer_token_position(this);
}

#endif  // __cplusplus

// ---------------- Memory Allocation

// The memory allocation related functions in this section aren't used by Wuffs
// per se, but they may be helpful to the code that uses Wuffs.

// wuffs_base__malloc_slice_uxx wraps calling a malloc-like function, except
// that it takes a uint64_t number of elements instead of a size_t size in
// bytes, and it returns a slice (a pointer and a length) instead of just a
// pointer.
//
// You can pass the C stdlib's malloc as the malloc_func.
//
// It returns an empty slice (containing a NULL ptr field) if num_uxx is zero
// or if (num_uxx * sizeof(uintxx_t)) would overflow SIZE_MAX.

static inline wuffs_base__slice_u8  //
wuffs_base__malloc_slice_u8(void* (*malloc_func)(size_t), uint64_t num_u8) {
  if (malloc_func && num_u8 && (num_u8 <= (SIZE_MAX / sizeof(uint8_t)))) {
    void* p = (*malloc_func)((size_t)(num_u8 * sizeof(uint8_t)));
    if (p) {
      return wuffs_base__make_slice_u8((uint8_t*)(p), (size_t)num_u8);
    }
  }
  return wuffs_base__empty_slice_u8();
}

static inline wuffs_base__slice_u16  //
wuffs_base__malloc_slice_u16(void* (*malloc_func)(size_t), uint64_t num_u16) {
  if (malloc_func && num_u16 && (num_u16 <= (SIZE_MAX / sizeof(uint16_t)))) {
    void* p = (*malloc_func)((size_t)(num_u16 * sizeof(uint16_t)));
    if (p) {
      return wuffs_base__make_slice_u16((uint16_t*)(p), (size_t)num_u16);
    }
  }
  return wuffs_base__empty_slice_u16();
}

static inline wuffs_base__slice_u32  //
wuffs_base__malloc_slice_u32(void* (*malloc_func)(size_t), uint64_t num_u32) {
  if (malloc_func && num_u32 && (num_u32 <= (SIZE_MAX / sizeof(uint32_t)))) {
    void* p = (*malloc_func)((size_t)(num_u32 * sizeof(uint32_t)));
    if (p) {
      return wuffs_base__make_slice_u32((uint32_t*)(p), (size_t)num_u32);
    }
  }
  return wuffs_base__empty_slice_u32();
}

static inline wuffs_base__slice_u64  //
wuffs_base__malloc_slice_u64(void* (*malloc_func)(size_t), uint64_t num_u64) {
  if (malloc_func && num_u64 && (num_u64 <= (SIZE_MAX / sizeof(uint64_t)))) {
    void* p = (*malloc_func)((size_t)(num_u64 * sizeof(uint64_t)));
    if (p) {
      return wuffs_base__make_slice_u64((uint64_t*)(p), (size_t)num_u64);
    }
  }
  return wuffs_base__empty_slice_u64();
}

// ---------------- Images

#define WUFFS_BASE__IMAGE__DIMENSION_MAX_INCL 0xFFFFFF

// wuffs_base__color_u32_argb_premul is an 8 bit per channel premultiplied
// Alpha, Red, Green, Blue color, as a uint32_t value. Its value is always
// 0xAARRGGBB (Alpha most significant, Blue least), regardless of endianness.
typedef uint32_t wuffs_base__color_u32_argb_premul;

// wuffs_base__color_u32_argb_premul__is_valid returns whether c's Red, Green
// and Blue channels are all less than or equal to its Alpha channel. c uses
// premultiplied alpha, so 50% opaque 100% saturated red is 0x7F7F_0000 and a
// value like 0x7F80_0000 is invalid.
static inline bool  //
wuffs_base__color_u32_argb_premul__is_valid(
    wuffs_base__color_u32_argb_premul c) {
  uint32_t a = 0xFF & (c >> 24);
  uint32_t r = 0xFF & (c >> 16);
  uint32_t g = 0xFF & (c >> 8);
  uint32_t b = 0xFF & (c >> 0);
  return (a >= r) && (a >= g) && (a >= b);
}

static inline uint16_t  //
wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
    wuffs_base__color_u32_argb_premul c) {
  uint32_t r5 = 0xF800 & (c >> 8);
  uint32_t g6 = 0x07E0 & (c >> 5);
  uint32_t b5 = 0x001F & (c >> 3);
  return (uint16_t)(r5 | g6 | b5);
}

static inline wuffs_base__color_u32_argb_premul  //
wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(uint16_t rgb_565) {
  uint32_t b5 = 0x1F & (rgb_565 >> 0);
  uint32_t b = (b5 << 3) | (b5 >> 2);
  uint32_t g6 = 0x3F & (rgb_565 >> 5);
  uint32_t g = (g6 << 2) | (g6 >> 4);
  uint32_t r5 = 0x1F & (rgb_565 >> 11);
  uint32_t r = (r5 << 3) | (r5 >> 2);
  return 0xFF000000 | (r << 16) | (g << 8) | (b << 0);
}

static inline uint8_t  //
wuffs_base__color_u32_argb_premul__as__color_u8_gray(
    wuffs_base__color_u32_argb_premul c) {
  // Work in 16-bit color.
  uint32_t cr = 0x101 * (0xFF & (c >> 16));
  uint32_t cg = 0x101 * (0xFF & (c >> 8));
  uint32_t cb = 0x101 * (0xFF & (c >> 0));

  // These coefficients (the fractions 0.299, 0.587 and 0.114) are the same
  // as those given by the JFIF specification.
  //
  // Note that 19595 + 38470 + 7471 equals 65536, also known as (1 << 16). We
  // shift by 24, not just by 16, because the return value is 8-bit color, not
  // 16-bit color.
  uint32_t weighted_average = (19595 * cr) + (38470 * cg) + (7471 * cb) + 32768;
  return (uint8_t)(weighted_average >> 24);
}

static inline uint16_t  //
wuffs_base__color_u32_argb_premul__as__color_u16_alpha_gray_nonpremul(
    wuffs_base__color_u32_argb_premul c) {
  uint32_t a = 0xFF & (c >> 24);
  if (a == 0) {
    return 0;
  }
  uint32_t a16 = a * 0x101;

  uint32_t cr = 0xFF & (c >> 16);
  cr = (cr * (0x101 * 0xFFFF)) / a16;
  uint32_t cg = 0xFF & (c >> 8);
  cg = (cg * (0x101 * 0xFFFF)) / a16;
  uint32_t cb = 0xFF & (c >> 0);
  cb = (cb * (0x101 * 0xFFFF)) / a16;

  uint32_t weighted_average = (19595 * cr) + (38470 * cg) + (7471 * cb) + 32768;
  return (uint16_t)((a16 & 0xFF00) | (weighted_average >> 24));
}

static inline uint16_t  //
wuffs_base__color_u32_argb_premul__as__color_u16_gray(
    wuffs_base__color_u32_argb_premul c) {
  // Work in 16-bit color.
  uint32_t cr = 0x101 * (0xFF & (c >> 16));
  uint32_t cg = 0x101 * (0xFF & (c >> 8));
  uint32_t cb = 0x101 * (0xFF & (c >> 0));

  // These coefficients (the fractions 0.299, 0.587 and 0.114) are the same
  // as those given by the JFIF specification.
  //
  // Note that 19595 + 38470 + 7471 equals 65536, also known as (1 << 16).
  uint32_t weighted_average = (19595 * cr) + (38470 * cg) + (7471 * cb) + 32768;
  return (uint16_t)(weighted_average >> 16);
}

// wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul converts
// from non-premultiplied alpha to premultiplied alpha.
static inline wuffs_base__color_u32_argb_premul  //
wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
    uint32_t argb_nonpremul) {
  // Multiplying by 0x101 (twice, once for alpha and once for color) converts
  // from 8-bit to 16-bit color. Shifting right by 8 undoes that.
  //
  // Working in the higher bit depth can produce slightly different (and
  // arguably slightly more accurate) results. For example, given 8-bit blue
  // and alpha of 0x80 and 0x81:
  //
  //  - ((0x80   * 0x81  ) / 0xFF  )      = 0x40        = 0x40
  //  - ((0x8080 * 0x8181) / 0xFFFF) >> 8 = 0x4101 >> 8 = 0x41
  uint32_t a = 0xFF & (argb_nonpremul >> 24);
  uint32_t a16 = a * (0x101 * 0x101);

  uint32_t r = 0xFF & (argb_nonpremul >> 16);
  r = ((r * a16) / 0xFFFF) >> 8;
  uint32_t g = 0xFF & (argb_nonpremul >> 8);
  g = ((g * a16) / 0xFFFF) >> 8;
  uint32_t b = 0xFF & (argb_nonpremul >> 0);
  b = ((b * a16) / 0xFFFF) >> 8;

  return (a << 24) | (r << 16) | (g << 8) | (b << 0);
}

// wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul converts
// from premultiplied alpha to non-premultiplied alpha.
static inline uint32_t  //
wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul(
    wuffs_base__color_u32_argb_premul c) {
  uint32_t a = 0xFF & (c >> 24);
  if (a == 0xFF) {
    return c;
  } else if (a == 0) {
    return 0;
  }
  uint32_t a16 = a * 0x101;

  uint32_t r = 0xFF & (c >> 16);
  r = ((r * (0x101 * 0xFFFF)) / a16) >> 8;
  uint32_t g = 0xFF & (c >> 8);
  g = ((g * (0x101 * 0xFFFF)) / a16) >> 8;
  uint32_t b = 0xFF & (c >> 0);
  b = ((b * (0x101 * 0xFFFF)) / a16) >> 8;

  return (a << 24) | (r << 16) | (g << 8) | (b << 0);
}

// wuffs_base__color_u64_argb_nonpremul__as__color_u32_argb_premul converts
// from 4x16LE non-premultiplied alpha to 4x8 premultiplied alpha.
static inline wuffs_base__color_u32_argb_premul  //
wuffs_base__color_u64_argb_nonpremul__as__color_u32_argb_premul(
    uint64_t argb_nonpremul) {
  uint32_t a16 = ((uint32_t)(0xFFFF & (argb_nonpremul >> 48)));

  uint32_t r16 = ((uint32_t)(0xFFFF & (argb_nonpremul >> 32)));
  r16 = (r16 * a16) / 0xFFFF;
  uint32_t g16 = ((uint32_t)(0xFFFF & (argb_nonpremul >> 16)));
  g16 = (g16 * a16) / 0xFFFF;
  uint32_t b16 = ((uint32_t)(0xFFFF & (argb_nonpremul >> 0)));
  b16 = (b16 * a16) / 0xFFFF;

  return ((a16 >> 8) << 24) | ((r16 >> 8) << 16) | ((g16 >> 8) << 8) |
         ((b16 >> 8) << 0);
}

// wuffs_base__color_u32_argb_premul__as__color_u64_argb_nonpremul converts
// from 4x8 premultiplied alpha to 4x16LE non-premultiplied alpha.
static inline uint64_t  //
wuffs_base__color_u32_argb_premul__as__color_u64_argb_nonpremul(
    wuffs_base__color_u32_argb_premul c) {
  uint32_t a = 0xFF & (c >> 24);
  if (a == 0xFF) {
    uint64_t r16 = 0x101 * (0xFF & (c >> 16));
    uint64_t g16 = 0x101 * (0xFF & (c >> 8));
    uint64_t b16 = 0x101 * (0xFF & (c >> 0));
    return 0xFFFF000000000000u | (r16 << 32) | (g16 << 16) | (b16 << 0);
  } else if (a == 0) {
    return 0;
  }
  uint64_t a16 = a * 0x101;

  uint64_t r = 0xFF & (c >> 16);
  uint64_t r16 = (r * (0x101 * 0xFFFF)) / a16;
  uint64_t g = 0xFF & (c >> 8);
  uint64_t g16 = (g * (0x101 * 0xFFFF)) / a16;
  uint64_t b = 0xFF & (c >> 0);
  uint64_t b16 = (b * (0x101 * 0xFFFF)) / a16;

  return (a16 << 48) | (r16 << 32) | (g16 << 16) | (b16 << 0);
}

static inline uint8_t  //
wuffs_base__color_u64_argb_premul__as__color_u8_gray(uint64_t argb_premul) {
  uint32_t r16 = ((uint32_t)(0xFFFF & (argb_premul >> 32)));
  uint32_t g16 = ((uint32_t)(0xFFFF & (argb_premul >> 16)));
  uint32_t b16 = ((uint32_t)(0xFFFF & (argb_premul >> 0)));

  // These coefficients (the fractions 0.299, 0.587 and 0.114) are the same
  // as those given by the JFIF specification.
  //
  // Note that 19595 + 38470 + 7471 equals 65536, also known as (1 << 16). We
  // shift by 24, not just by 16, because the return value is 8-bit color, not
  // 16-bit color.
  uint32_t weighted_average =
      (19595 * r16) + (38470 * g16) + (7471 * b16) + 32768;
  return (uint8_t)(weighted_average >> 24);
}

static inline uint8_t  //
wuffs_base__color_u64_argb_nonpremul__as__color_u8_gray(
    uint64_t argb_nonpremul) {
  uint32_t a16 = ((uint32_t)(0xFFFF & (argb_nonpremul >> 48)));

  uint32_t r16 = ((uint32_t)(0xFFFF & (argb_nonpremul >> 32)));
  r16 = (r16 * a16) / 0xFFFF;
  uint32_t g16 = ((uint32_t)(0xFFFF & (argb_nonpremul >> 16)));
  g16 = (g16 * a16) / 0xFFFF;
  uint32_t b16 = ((uint32_t)(0xFFFF & (argb_nonpremul >> 0)));
  b16 = (b16 * a16) / 0xFFFF;

  // These coefficients (the fractions 0.299, 0.587 and 0.114) are the same
  // as those given by the JFIF specification.
  //
  // Note that 19595 + 38470 + 7471 equals 65536, also known as (1 << 16). We
  // shift by 24, not just by 16, because the return value is 8-bit color, not
  // 16-bit color.
  uint32_t weighted_average =
      (19595 * r16) + (38470 * g16) + (7471 * b16) + 32768;
  return (uint8_t)(weighted_average >> 24);
}

static inline uint64_t  //
wuffs_base__color_u32__as__color_u64(uint32_t c) {
  uint64_t a16 = 0x101 * (0xFF & (c >> 24));
  uint64_t r16 = 0x101 * (0xFF & (c >> 16));
  uint64_t g16 = 0x101 * (0xFF & (c >> 8));
  uint64_t b16 = 0x101 * (0xFF & (c >> 0));
  return (a16 << 48) | (r16 << 32) | (g16 << 16) | (b16 << 0);
}

static inline uint32_t  //
wuffs_base__color_u64__as__color_u32(uint64_t c) {
  uint32_t a = ((uint32_t)(0xFF & (c >> 56)));
  uint32_t r = ((uint32_t)(0xFF & (c >> 40)));
  uint32_t g = ((uint32_t)(0xFF & (c >> 24)));
  uint32_t b = ((uint32_t)(0xFF & (c >> 8)));
  return (a << 24) | (r << 16) | (g << 8) | (b << 0);
}

// wuffs_base__color_ycc__as__color_u32 converts from YCbCr to 0xAARRGGBB. The
// alpha bits are always 0xFF.
static inline wuffs_base__color_u32_argb_premul  //
wuffs_base__color_ycc__as__color_u32(uint8_t yy, uint8_t cb, uint8_t cr) {
  // Work in 16.16 fixed point arithmetic (so that 'one half' is (1 << 15)) and
  // bias the chroma values by 0x80.
  uint32_t yy32 = (((uint32_t)yy) << 16) | (1 << 15);
  uint32_t cb32 = (((uint32_t)cb) - 0x80);
  uint32_t cr32 = (((uint32_t)cr) - 0x80);

  // The formulae:
  //
  //  R = Y                + 1.40200 * Cr
  //  G = Y - 0.34414 * Cb - 0.71414 * Cr
  //  B = Y + 1.77200 * Cb
  //
  // When scaled by 1<<16:
  //
  //  0.34414 becomes 0x0581A =  22554.
  //  0.71414 becomes 0x0B6D2 =  46802.
  //  1.40200 becomes 0x166E9 =  91881.
  //  1.77200 becomes 0x1C5A2 = 116130.
  //
  // Since we're working in 16.16 fixed point arithmetic, masking by 0x00FF0000
  // (possibly followed by a shift) gives the relevant 8 bits per channel.
  //
  // However, we need to saturate for overflow (above 0x00FFFFFF, but not so
  // high that the MSB Most Significant Bit is set) or for underflow (below
  // 0x00000000 as int32_t, which means that the MSB is set as uint32_t). In
  // both cases, some of the high 8 bits (bits 24 ..= 31) will be set.
  //
  // "((uint32_t)(((int32_t)x) >> 31))" just replicates x's MSB across all 32
  // bits. Prepending that with "~" inverts those bits. Thus, "~(etc)" is
  // either 0xFFFFFFFF (for overflow) or 0x00000000 (for underflow).
  uint32_t rr32 = yy32 + (0x166E9 * cr32);
  uint32_t gg32 = yy32 - (0x0581A * cb32) - (0x0B6D2 * cr32);
  uint32_t bb32 = yy32 + (0x1C5A2 * cb32);
  if (rr32 >> 24) {
    rr32 = ~((uint32_t)(((int32_t)rr32) >> 31));
  }
  if (gg32 >> 24) {
    gg32 = ~((uint32_t)(((int32_t)gg32) >> 31));
  }
  if (bb32 >> 24) {
    bb32 = ~((uint32_t)(((int32_t)bb32) >> 31));
  }
  return 0xFF000000 |                  //
         ((0x00FF0000 & rr32) >> 0) |  //
         ((0x00FF0000 & gg32) >> 8) |  //
         ((0x00FF0000 & bb32) >> 16);
}

// wuffs_base__color_ycc__as__color_u32_abgr is like
// wuffs_base__color_ycc__as__color_u32 but the uint32_t returned is in
// 0xAABBGGRR order, not 0xAARRGGBB.
static inline uint32_t  //
wuffs_base__color_ycc__as__color_u32_abgr(uint8_t yy, uint8_t cb, uint8_t cr) {
  uint32_t yy32 = (((uint32_t)yy) << 16) | (1 << 15);
  uint32_t cb32 = (((uint32_t)cb) - 0x80);
  uint32_t cr32 = (((uint32_t)cr) - 0x80);
  uint32_t rr32 = yy32 + (0x166E9 * cr32);
  uint32_t gg32 = yy32 - (0x0581A * cb32) - (0x0B6D2 * cr32);
  uint32_t bb32 = yy32 + (0x1C5A2 * cb32);
  if (rr32 >> 24) {
    rr32 = ~((uint32_t)(((int32_t)rr32) >> 31));
  }
  if (gg32 >> 24) {
    gg32 = ~((uint32_t)(((int32_t)gg32) >> 31));
  }
  if (bb32 >> 24) {
    bb32 = ~((uint32_t)(((int32_t)bb32) >> 31));
  }
  return 0xFF000000 |                  //
         ((0x00FF0000 & bb32) >> 0) |  //
         ((0x00FF0000 & gg32) >> 8) |  //
         ((0x00FF0000 & rr32) >> 16);
}

// --------

typedef uint8_t wuffs_base__pixel_blend;

// wuffs_base__pixel_blend encodes how to blend source and destination pixels,
// accounting for transparency. It encompasses the Porter-Duff compositing
// operators as well as the other blending modes defined by PDF.
//
// TODO: implement the other modes.
#define WUFFS_BASE__PIXEL_BLEND__SRC ((wuffs_base__pixel_blend)0)
#define WUFFS_BASE__PIXEL_BLEND__SRC_OVER ((wuffs_base__pixel_blend)1)

// --------

// wuffs_base__pixel_alpha_transparency is a pixel format's alpha channel
// model. It is a property of the pixel format in general, not of a specific
// pixel. An RGBA pixel format (with alpha) can still have fully opaque pixels.
typedef uint32_t wuffs_base__pixel_alpha_transparency;

#define WUFFS_BASE__PIXEL_ALPHA_TRANSPARENCY__OPAQUE 0
#define WUFFS_BASE__PIXEL_ALPHA_TRANSPARENCY__NONPREMULTIPLIED_ALPHA 1
#define WUFFS_BASE__PIXEL_ALPHA_TRANSPARENCY__PREMULTIPLIED_ALPHA 2
#define WUFFS_BASE__PIXEL_ALPHA_TRANSPARENCY__BINARY_ALPHA 3

// --------

// wuffs_base__pixel_coloration is whether a pixel format's color model has no
// color (alpha only), gray color or rich (non-gray) color. Rich color includes
// RGB, BGR, YCC, YCCK, CMY and CMYK.
//
// Coloration does not capture the alpha aspect of the color model. It does not
// distinguish RGB from RGBA.
typedef uint32_t wuffs_base__pixel_coloration;

#define WUFFS_BASE__PIXEL_COLORATION__NONE 0
#define WUFFS_BASE__PIXEL_COLORATION__GRAY 1
#define WUFFS_BASE__PIXEL_COLORATION__RICH 3

// --------

// Deprecated: use WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX_INCL.
#define WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX 4

#define WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX_INCL 4

#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__INDEX_PLANE 0
#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE 3

// A palette is 256 entries × 4 bytes per entry (e.g. BGRA).
#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH 1024

// wuffs_base__pixel_format encodes the format of the bytes that constitute an
// image frame's pixel data.
//
// See https://github.com/google/wuffs/blob/main/doc/note/pixel-formats.md
//
// Do not manipulate its bits directly; they are private implementation
// details. Use methods such as wuffs_base__pixel_format__num_planes instead.
typedef struct wuffs_base__pixel_format__struct {
  uint32_t repr;

#ifdef __cplusplus
  inline bool is_valid() const;
  inline uint32_t bits_per_pixel() const;
  inline bool is_direct() const;
  inline bool is_indexed() const;
  inline bool is_interleaved() const;
  inline bool is_planar() const;
  inline uint32_t coloration() const;
  inline uint32_t num_planes() const;
  inline wuffs_base__pixel_alpha_transparency transparency() const;
#endif  // __cplusplus

} wuffs_base__pixel_format;

static inline wuffs_base__pixel_format  //
wuffs_base__make_pixel_format(uint32_t repr) {
  wuffs_base__pixel_format f;
  f.repr = repr;
  return f;
}

// Common 8-bit-depth pixel formats. This list is not exhaustive; not all valid
// wuffs_base__pixel_format values are present.

// clang-format off

#define WUFFS_BASE__PIXEL_FORMAT__INVALID                   0x00000000

#define WUFFS_BASE__PIXEL_FORMAT__A                         0x02000008

#define WUFFS_BASE__PIXEL_FORMAT__Y                         0x20000008
#define WUFFS_BASE__PIXEL_FORMAT__Y_16LE                    0x2000000B
#define WUFFS_BASE__PIXEL_FORMAT__Y_16BE                    0x2010000B
#define WUFFS_BASE__PIXEL_FORMAT__YA_NONPREMUL              0x21000088
#define WUFFS_BASE__PIXEL_FORMAT__YA_PREMUL                 0x22000088

#define WUFFS_BASE__PIXEL_FORMAT__YCBCR                     0x40020888
#define WUFFS_BASE__PIXEL_FORMAT__YCBCRA_NONPREMUL          0x41038888
#define WUFFS_BASE__PIXEL_FORMAT__YCBCRK                    0x50038888

#define WUFFS_BASE__PIXEL_FORMAT__YCOCG                     0x60020888
#define WUFFS_BASE__PIXEL_FORMAT__YCOCGA_NONPREMUL          0x61038888
#define WUFFS_BASE__PIXEL_FORMAT__YCOCGK                    0x70038888

#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL   0x81040008
#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL      0x82040008
#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY      0x83040008

#define WUFFS_BASE__PIXEL_FORMAT__BGR_565                   0x80000565
#define WUFFS_BASE__PIXEL_FORMAT__BGR                       0x80000888
#define WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL            0x81008888
#define WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE     0x8100BBBB
#define WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL               0x82008888
#define WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL_4X16LE        0x8200BBBB
#define WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY               0x83008888
#define WUFFS_BASE__PIXEL_FORMAT__BGRX                      0x90008888

#define WUFFS_BASE__PIXEL_FORMAT__RGB                       0xA0000888
#define WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL            0xA1008888
#define WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL_4X16LE     0xA100BBBB
#define WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL               0xA2008888
#define WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL_4X16LE        0xA200BBBB
#define WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY               0xA3008888
#define WUFFS_BASE__PIXEL_FORMAT__RGBX                      0xB0008888

#define WUFFS_BASE__PIXEL_FORMAT__CMY                       0xC0020888
#define WUFFS_BASE__PIXEL_FORMAT__CMYK                      0xD0038888

// clang-format on

extern const uint32_t wuffs_private_impl__pixel_format__bits_per_channel[16];

static inline bool  //
wuffs_base__pixel_format__is_valid(const wuffs_base__pixel_format* f) {
  return f->repr != 0;
}

// wuffs_base__pixel_format__bits_per_pixel returns the number of bits per
// pixel for interleaved pixel formats, and returns 0 for planar pixel formats.
static inline uint32_t  //
wuffs_base__pixel_format__bits_per_pixel(const wuffs_base__pixel_format* f) {
  if (((f->repr >> 16) & 0x03) != 0) {
    return 0;
  }
  return wuffs_private_impl__pixel_format__bits_per_channel[0x0F &
                                                            (f->repr >> 0)] +
         wuffs_private_impl__pixel_format__bits_per_channel[0x0F &
                                                            (f->repr >> 4)] +
         wuffs_private_impl__pixel_format__bits_per_channel[0x0F &
                                                            (f->repr >> 8)] +
         wuffs_private_impl__pixel_format__bits_per_channel[0x0F &
                                                            (f->repr >> 12)];
}

static inline bool  //
wuffs_base__pixel_format__is_direct(const wuffs_base__pixel_format* f) {
  return ((f->repr >> 18) & 0x01) == 0;
}

static inline bool  //
wuffs_base__pixel_format__is_indexed(const wuffs_base__pixel_format* f) {
  return ((f->repr >> 18) & 0x01) != 0;
}

static inline bool  //
wuffs_base__pixel_format__is_interleaved(const wuffs_base__pixel_format* f) {
  return ((f->repr >> 16) & 0x03) == 0;
}

static inline bool  //
wuffs_base__pixel_format__is_planar(const wuffs_base__pixel_format* f) {
  return ((f->repr >> 16) & 0x03) != 0;
}

static inline uint32_t  //
wuffs_base__pixel_format__coloration(const wuffs_base__pixel_format* f) {
  uint32_t n = (f->repr) >> 29;
  return (n <= 1) ? n : 3;
}

static inline uint32_t  //
wuffs_base__pixel_format__num_planes(const wuffs_base__pixel_format* f) {
  return ((f->repr >> 16) & 0x03) + 1;
}

static inline wuffs_base__pixel_alpha_transparency  //
wuffs_base__pixel_format__transparency(const wuffs_base__pixel_format* f) {
  return (wuffs_base__pixel_alpha_transparency)((f->repr >> 24) & 0x03);
}

#ifdef __cplusplus

inline bool  //
wuffs_base__pixel_format::is_valid() const {
  return wuffs_base__pixel_format__is_valid(this);
}

inline uint32_t  //
wuffs_base__pixel_format::bits_per_pixel() const {
  return wuffs_base__pixel_format__bits_per_pixel(this);
}

inline bool  //
wuffs_base__pixel_format::is_direct() const {
  return wuffs_base__pixel_format__is_direct(this);
}

inline bool  //
wuffs_base__pixel_format::is_indexed() const {
  return wuffs_base__pixel_format__is_indexed(this);
}

inline bool  //
wuffs_base__pixel_format::is_interleaved() const {
  return wuffs_base__pixel_format__is_interleaved(this);
}

inline bool  //
wuffs_base__pixel_format::is_planar() const {
  return wuffs_base__pixel_format__is_planar(this);
}

inline uint32_t  //
wuffs_base__pixel_format::coloration() const {
  return wuffs_base__pixel_format__coloration(this);
}

inline uint32_t  //
wuffs_base__pixel_format::num_planes() const {
  return wuffs_base__pixel_format__num_planes(this);
}

inline wuffs_base__pixel_alpha_transparency  //
wuffs_base__pixel_format::transparency() const {
  return wuffs_base__pixel_format__transparency(this);
}

#endif  // __cplusplus

// --------

// wuffs_base__pixel_subsampling encodes whether sample values cover one pixel
// or cover multiple pixels.
//
// See https://github.com/google/wuffs/blob/main/doc/note/pixel-subsampling.md
//
// Do not manipulate its bits directly; they are private implementation
// details. Use methods such as wuffs_base__pixel_subsampling__bias_x instead.
typedef struct wuffs_base__pixel_subsampling__struct {
  uint32_t repr;

#ifdef __cplusplus
  inline uint32_t bias_x(uint32_t plane) const;
  inline uint32_t denominator_x(uint32_t plane) const;
  inline uint32_t bias_y(uint32_t plane) const;
  inline uint32_t denominator_y(uint32_t plane) const;
#endif  // __cplusplus

} wuffs_base__pixel_subsampling;

static inline wuffs_base__pixel_subsampling  //
wuffs_base__make_pixel_subsampling(uint32_t repr) {
  wuffs_base__pixel_subsampling s;
  s.repr = repr;
  return s;
}

#define WUFFS_BASE__PIXEL_SUBSAMPLING__NONE 0x00000000

#define WUFFS_BASE__PIXEL_SUBSAMPLING__444 0x000000
#define WUFFS_BASE__PIXEL_SUBSAMPLING__440 0x010100
#define WUFFS_BASE__PIXEL_SUBSAMPLING__422 0x101000
#define WUFFS_BASE__PIXEL_SUBSAMPLING__420 0x111100
#define WUFFS_BASE__PIXEL_SUBSAMPLING__411 0x303000
#define WUFFS_BASE__PIXEL_SUBSAMPLING__410 0x313100

static inline uint32_t  //
wuffs_base__pixel_subsampling__bias_x(const wuffs_base__pixel_subsampling* s,
                                      uint32_t plane) {
  uint32_t shift = ((plane & 0x03) * 8) + 6;
  return (s->repr >> shift) & 0x03;
}

static inline uint32_t  //
wuffs_base__pixel_subsampling__denominator_x(
    const wuffs_base__pixel_subsampling* s,
    uint32_t plane) {
  uint32_t shift = ((plane & 0x03) * 8) + 4;
  return ((s->repr >> shift) & 0x03) + 1;
}

static inline uint32_t  //
wuffs_base__pixel_subsampling__bias_y(const wuffs_base__pixel_subsampling* s,
                                      uint32_t plane) {
  uint32_t shift = ((plane & 0x03) * 8) + 2;
  return (s->repr >> shift) & 0x03;
}

static inline uint32_t  //
wuffs_base__pixel_subsampling__denominator_y(
    const wuffs_base__pixel_subsampling* s,
    uint32_t plane) {
  uint32_t shift = ((plane & 0x03) * 8) + 0;
  return ((s->repr >> shift) & 0x03) + 1;
}

#ifdef __cplusplus

inline uint32_t  //
wuffs_base__pixel_subsampling::bias_x(uint32_t plane) const {
  return wuffs_base__pixel_subsampling__bias_x(this, plane);
}

inline uint32_t  //
wuffs_base__pixel_subsampling::denominator_x(uint32_t plane) const {
  return wuffs_base__pixel_subsampling__denominator_x(this, plane);
}

inline uint32_t  //
wuffs_base__pixel_subsampling::bias_y(uint32_t plane) const {
  return wuffs_base__pixel_subsampling__bias_y(this, plane);
}

inline uint32_t  //
wuffs_base__pixel_subsampling::denominator_y(uint32_t plane) const {
  return wuffs_base__pixel_subsampling__denominator_y(this, plane);
}

#endif  // __cplusplus

// --------

typedef struct wuffs_base__pixel_config__struct {
  // Do not access the private_impl's fields directly. There is no API/ABI
  // compatibility or safety guarantee if you do so.
  struct {
    wuffs_base__pixel_format pixfmt;
    wuffs_base__pixel_subsampling pixsub;
    uint32_t width;
    uint32_t height;
  } private_impl;

#ifdef __cplusplus
  inline void set(uint32_t pixfmt_repr,
                  uint32_t pixsub_repr,
                  uint32_t width,
                  uint32_t height);
  inline void invalidate();
  inline bool is_valid() const;
  inline wuffs_base__pixel_format pixel_format() const;
  inline wuffs_base__pixel_subsampling pixel_subsampling() const;
  inline wuffs_base__rect_ie_u32 bounds() const;
  inline uint32_t width() const;
  inline uint32_t height() const;
  inline uint64_t pixbuf_len() const;
#endif  // __cplusplus

} wuffs_base__pixel_config;

static inline wuffs_base__pixel_config  //
wuffs_base__null_pixel_config(void) {
  wuffs_base__pixel_config ret;
  ret.private_impl.pixfmt.repr = 0;
  ret.private_impl.pixsub.repr = 0;
  ret.private_impl.width = 0;
  ret.private_impl.height = 0;
  return ret;
}

// TODO: Should this function return bool? An error type?
static inline void  //
wuffs_base__pixel_config__set(wuffs_base__pixel_config* c,
                              uint32_t pixfmt_repr,
                              uint32_t pixsub_repr,
                              uint32_t width,
                              uint32_t height) {
  if (!c) {
    return;
  }
  if (pixfmt_repr) {
    do {
#if SIZE_MAX < 0xFFFFFFFFFFFFFFFFull
      uint64_t wh = ((uint64_t)width) * ((uint64_t)height);
      // TODO: handle things other than 1 byte per pixel.
      if (wh > ((uint64_t)SIZE_MAX)) {
        break;
      }
#endif
      c->private_impl.pixfmt.repr = pixfmt_repr;
      c->private_impl.pixsub.repr = pixsub_repr;
      c->private_impl.width = width;
      c->private_impl.height = height;
      return;
    } while (0);
  }

  c->private_impl.pixfmt.repr = 0;
  c->private_impl.pixsub.repr = 0;
  c->private_impl.width = 0;
  c->private_impl.height = 0;
}

static inline void  //
wuffs_base__pixel_config__invalidate(wuffs_base__pixel_config* c) {
  if (c) {
    c->private_impl.pixfmt.repr = 0;
    c->private_impl.pixsub.repr = 0;
    c->private_impl.width = 0;
    c->private_impl.height = 0;
  }
}

static inline bool  //
wuffs_base__pixel_config__is_valid(const wuffs_base__pixel_config* c) {
  return c && c->private_impl.pixfmt.repr;
}

static inline wuffs_base__pixel_format  //
wuffs_base__pixel_config__pixel_format(const wuffs_base__pixel_config* c) {
  return c ? c->private_impl.pixfmt : wuffs_base__make_pixel_format(0);
}

static inline wuffs_base__pixel_subsampling  //
wuffs_base__pixel_config__pixel_subsampling(const wuffs_base__pixel_config* c) {
  return c ? c->private_impl.pixsub : wuffs_base__make_pixel_subsampling(0);
}

static inline wuffs_base__rect_ie_u32  //
wuffs_base__pixel_config__bounds(const wuffs_base__pixel_config* c) {
  if (c) {
    wuffs_base__rect_ie_u32 ret;
    ret.min_incl_x = 0;
    ret.min_incl_y = 0;
    ret.max_excl_x = c->private_impl.width;
    ret.max_excl_y = c->private_impl.height;
    return ret;
  }

  wuffs_base__rect_ie_u32 ret;
  ret.min_incl_x = 0;
  ret.min_incl_y = 0;
  ret.max_excl_x = 0;
  ret.max_excl_y = 0;
  return ret;
}

static inline uint32_t  //
wuffs_base__pixel_config__width(const wuffs_base__pixel_config* c) {
  return c ? c->private_impl.width : 0;
}

static inline uint32_t  //
wuffs_base__pixel_config__height(const wuffs_base__pixel_config* c) {
  return c ? c->private_impl.height : 0;
}

// TODO: this is the right API for planar (not interleaved) pixbufs? Should it
// allow decoding into a color model different from the format's intrinsic one?
// For example, decoding a JPEG image straight to RGBA instead of to YCbCr?
static inline uint64_t  //
wuffs_base__pixel_config__pixbuf_len(const wuffs_base__pixel_config* c) {
  if (!c) {
    return 0;
  }
  if (wuffs_base__pixel_format__is_planar(&c->private_impl.pixfmt)) {
    // TODO: support planar pixel formats, concious of pixel subsampling.
    return 0;
  }
  uint32_t bits_per_pixel =
      wuffs_base__pixel_format__bits_per_pixel(&c->private_impl.pixfmt);
  if ((bits_per_pixel == 0) || ((bits_per_pixel % 8) != 0)) {
    // TODO: support fraction-of-byte pixels, e.g. 1 bit per pixel?
    return 0;
  }
  uint64_t bytes_per_pixel = bits_per_pixel / 8;

  uint64_t n =
      ((uint64_t)c->private_impl.width) * ((uint64_t)c->private_impl.height);
  if (n > (UINT64_MAX / bytes_per_pixel)) {
    return 0;
  }
  n *= bytes_per_pixel;

  if (wuffs_base__pixel_format__is_indexed(&c->private_impl.pixfmt)) {
    if (n >
        (UINT64_MAX - WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH)) {
      return 0;
    }
    n += WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH;
  }

  return n;
}

#ifdef __cplusplus

inline void  //
wuffs_base__pixel_config::set(uint32_t pixfmt_repr,
                              uint32_t pixsub_repr,
                              uint32_t width,
                              uint32_t height) {
  wuffs_base__pixel_config__set(this, pixfmt_repr, pixsub_repr, width, height);
}

inline void  //
wuffs_base__pixel_config::invalidate() {
  wuffs_base__pixel_config__invalidate(this);
}

inline bool  //
wuffs_base__pixel_config::is_valid() const {
  return wuffs_base__pixel_config__is_valid(this);
}

inline wuffs_base__pixel_format  //
wuffs_base__pixel_config::pixel_format() const {
  return wuffs_base__pixel_config__pixel_format(this);
}

inline wuffs_base__pixel_subsampling  //
wuffs_base__pixel_config::pixel_subsampling() const {
  return wuffs_base__pixel_config__pixel_subsampling(this);
}

inline wuffs_base__rect_ie_u32  //
wuffs_base__pixel_config::bounds() const {
  return wuffs_base__pixel_config__bounds(this);
}

inline uint32_t  //
wuffs_base__pixel_config::width() const {
  return wuffs_base__pixel_config__width(this);
}

inline uint32_t  //
wuffs_base__pixel_config::height() const {
  return wuffs_base__pixel_config__height(this);
}

inline uint64_t  //
wuffs_base__pixel_config::pixbuf_len() const {
  return wuffs_base__pixel_config__pixbuf_len(this);
}

#endif  // __cplusplus

// --------

typedef struct wuffs_base__image_config__struct {
  wuffs_base__pixel_config pixcfg;

  // Do not access the private_impl's fields directly. There is no API/ABI
  // compatibility or safety guarantee if you do so.
  struct {
    uint64_t first_frame_io_position;
    bool first_frame_is_opaque;
  } private_impl;

#ifdef __cplusplus
  inline void set(uint32_t pixfmt_repr,
                  uint32_t pixsub_repr,
                  uint32_t width,
                  uint32_t height,
                  uint64_t first_frame_io_position,
                  bool first_frame_is_opaque);
  inline void invalidate();
  inline bool is_valid() const;
  inline uint64_t first_frame_io_position() const;
  inline bool first_frame_is_opaque() const;
#endif  // __cplusplus

} wuffs_base__image_config;

static inline wuffs_base__image_config  //
wuffs_base__null_image_config(void) {
  wuffs_base__image_config ret;
  ret.pixcfg = wuffs_base__null_pixel_config();
  ret.private_impl.first_frame_io_position = 0;
  ret.private_impl.first_frame_is_opaque = false;
  return ret;
}

// TODO: Should this function return bool? An error type?
static inline void  //
wuffs_base__image_config__set(wuffs_base__image_config* c,
                              uint32_t pixfmt_repr,
                              uint32_t pixsub_repr,
                              uint32_t width,
                              uint32_t height,
                              uint64_t first_frame_io_position,
                              bool first_frame_is_opaque) {
  if (!c) {
    return;
  }
  if (pixfmt_repr) {
    c->pixcfg.private_impl.pixfmt.repr = pixfmt_repr;
    c->pixcfg.private_impl.pixsub.repr = pixsub_repr;
    c->pixcfg.private_impl.width = width;
    c->pixcfg.private_impl.height = height;
    c->private_impl.first_frame_io_position = first_frame_io_position;
    c->private_impl.first_frame_is_opaque = first_frame_is_opaque;
    return;
  }

  c->pixcfg.private_impl.pixfmt.repr = 0;
  c->pixcfg.private_impl.pixsub.repr = 0;
  c->pixcfg.private_impl.width = 0;
  c->pixcfg.private_impl.height = 0;
  c->private_impl.first_frame_io_position = 0;
  c->private_impl.first_frame_is_opaque = 0;
}

static inline void  //
wuffs_base__image_config__invalidate(wuffs_base__image_config* c) {
  if (c) {
    c->pixcfg.private_impl.pixfmt.repr = 0;
    c->pixcfg.private_impl.pixsub.repr = 0;
    c->pixcfg.private_impl.width = 0;
    c->pixcfg.private_impl.height = 0;
    c->private_impl.first_frame_io_position = 0;
    c->private_impl.first_frame_is_opaque = 0;
  }
}

static inline bool  //
wuffs_base__image_config__is_valid(const wuffs_base__image_config* c) {
  return c && wuffs_base__pixel_config__is_valid(&(c->pixcfg));
}

static inline uint64_t  //
wuffs_base__image_config__first_frame_io_position(
    const wuffs_base__image_config* c) {
  return c ? c->private_impl.first_frame_io_position : 0;
}

static inline bool  //
wuffs_base__image_config__first_frame_is_opaque(
    const wuffs_base__image_config* c) {
  return c ? c->private_impl.first_frame_is_opaque : false;
}

#ifdef __cplusplus

inline void  //
wuffs_base__image_config::set(uint32_t pixfmt_repr,
                              uint32_t pixsub_repr,
                              uint32_t width,
                              uint32_t height,
                              uint64_t first_frame_io_position,
                              bool first_frame_is_opaque) {
  wuffs_base__image_config__set(this, pixfmt_repr, pixsub_repr, width, height,
                                first_frame_io_position, first_frame_is_opaque);
}

inline void  //
wuffs_base__image_config::invalidate() {
  wuffs_base__image_config__invalidate(this);
}

inline bool  //
wuffs_base__image_config::is_valid() const {
  return wuffs_base__image_config__is_valid(this);
}

inline uint64_t  //
wuffs_base__image_config::first_frame_io_position() const {
  return wuffs_base__image_config__first_frame_io_position(this);
}

inline bool  //
wuffs_base__image_config::first_frame_is_opaque() const {
  return wuffs_base__image_config__first_frame_is_opaque(this);
}

#endif  // __cplusplus

// --------

// wuffs_base__animation_disposal encodes, for an animated image, how to
// dispose of a frame after displaying it:
//  - None means to draw the next frame on top of this one.
//  - Restore Background means to clear the frame's dirty rectangle to "the
//    background color" (in practice, this means transparent black) before
//    drawing the next frame.
//  - Restore Previous means to undo the current frame, so that the next frame
//    is drawn on top of the previous one.
typedef uint8_t wuffs_base__animation_disposal;

#define WUFFS_BASE__ANIMATION_DISPOSAL__NONE ((wuffs_base__animation_disposal)0)
#define WUFFS_BASE__ANIMATION_DISPOSAL__RESTORE_BACKGROUND \
  ((wuffs_base__animation_disposal)1)
#define WUFFS_BASE__ANIMATION_DISPOSAL__RESTORE_PREVIOUS \
  ((wuffs_base__animation_disposal)2)

// --------

typedef struct wuffs_base__frame_config__struct {
  // Do not access the private_impl's fields directly. There is no API/ABI
  // compatibility or safety guarantee if you do so.
  struct {
    wuffs_base__rect_ie_u32 bounds;
    wuffs_base__flicks duration;
    uint64_t index;
    uint64_t io_position;
    wuffs_base__animation_disposal disposal;
    bool opaque_within_bounds;
    bool overwrite_instead_of_blend;
    wuffs_base__color_u32_argb_premul background_color;
  } private_impl;

#ifdef __cplusplus
  inline void set(wuffs_base__rect_ie_u32 bounds,
                  wuffs_base__flicks duration,
                  uint64_t index,
                  uint64_t io_position,
                  wuffs_base__animation_disposal disposal,
                  bool opaque_within_bounds,
                  bool overwrite_instead_of_blend,
                  wuffs_base__color_u32_argb_premul background_color);
  inline wuffs_base__rect_ie_u32 bounds() const;
  inline uint32_t width() const;
  inline uint32_t height() const;
  inline wuffs_base__flicks duration() const;
  inline uint64_t index() const;
  inline uint64_t io_position() const;
  inline wuffs_base__animation_disposal disposal() const;
  inline bool opaque_within_bounds() const;
  inline bool overwrite_instead_of_blend() const;
  inline wuffs_base__color_u32_argb_premul background_color() const;
#endif  // __cplusplus

} wuffs_base__frame_config;

static inline wuffs_base__frame_config  //
wuffs_base__null_frame_config(void) {
  wuffs_base__frame_config ret;
  ret.private_impl.bounds = wuffs_base__make_rect_ie_u32(0, 0, 0, 0);
  ret.private_impl.duration = 0;
  ret.private_impl.index = 0;
  ret.private_impl.io_position = 0;
  ret.private_impl.disposal = 0;
  ret.private_impl.opaque_within_bounds = false;
  ret.private_impl.overwrite_instead_of_blend = false;
  return ret;
}

static inline void  //
wuffs_base__frame_config__set(
    wuffs_base__frame_config* c,
    wuffs_base__rect_ie_u32 bounds,
    wuffs_base__flicks duration,
    uint64_t index,
    uint64_t io_position,
    wuffs_base__animation_disposal disposal,
    bool opaque_within_bounds,
    bool overwrite_instead_of_blend,
    wuffs_base__color_u32_argb_premul background_color) {
  if (!c) {
    return;
  }

  c->private_impl.bounds = bounds;
  c->private_impl.duration = duration;
  c->private_impl.index = index;
  c->private_impl.io_position = io_position;
  c->private_impl.disposal = disposal;
  c->private_impl.opaque_within_bounds = opaque_within_bounds;
  c->private_impl.overwrite_instead_of_blend = overwrite_instead_of_blend;
  c->private_impl.background_color = background_color;
}

static inline wuffs_base__rect_ie_u32  //
wuffs_base__frame_config__bounds(const wuffs_base__frame_config* c) {
  if (c) {
    return c->private_impl.bounds;
  }

  wuffs_base__rect_ie_u32 ret;
  ret.min_incl_x = 0;
  ret.min_incl_y = 0;
  ret.max_excl_x = 0;
  ret.max_excl_y = 0;
  return ret;
}

static inline uint32_t  //
wuffs_base__frame_config__width(const wuffs_base__frame_config* c) {
  return c ? wuffs_base__rect_ie_u32__width(&c->private_impl.bounds) : 0;
}

static inline uint32_t  //
wuffs_base__frame_config__height(const wuffs_base__frame_config* c) {
  return c ? wuffs_base__rect_ie_u32__height(&c->private_impl.bounds) : 0;
}

// wuffs_base__frame_config__duration returns the amount of time to display
// this frame. Zero means to display forever - a still (non-animated) image.
static inline wuffs_base__flicks  //
wuffs_base__frame_config__duration(const wuffs_base__frame_config* c) {
  return c ? c->private_impl.duration : 0;
}

// wuffs_base__frame_config__index returns the index of this frame. The first
// frame in an image has index 0, the second frame has index 1, and so on.
static inline uint64_t  //
wuffs_base__frame_config__index(const wuffs_base__frame_config* c) {
  return c ? c->private_impl.index : 0;
}

// wuffs_base__frame_config__io_position returns the I/O stream position before
// the frame config.
static inline uint64_t  //
wuffs_base__frame_config__io_position(const wuffs_base__frame_config* c) {
  return c ? c->private_impl.io_position : 0;
}

// wuffs_base__frame_config__disposal returns, for an animated image, how to
// dispose of this frame after displaying it.
static inline wuffs_base__animation_disposal  //
wuffs_base__frame_config__disposal(const wuffs_base__frame_config* c) {
  return c ? c->private_impl.disposal : 0;
}

// wuffs_base__frame_config__opaque_within_bounds returns whether all pixels
// within the frame's bounds are fully opaque. It makes no claim about pixels
// outside the frame bounds but still inside the overall image. The two
// bounding rectangles can differ for animated images.
//
// Its semantics are conservative. It is valid for a fully opaque frame to have
// this value be false: a false negative.
//
// If true, drawing the frame with WUFFS_BASE__PIXEL_BLEND__SRC and
// WUFFS_BASE__PIXEL_BLEND__SRC_OVER should be equivalent, in terms of
// resultant pixels, but the former may be faster.
static inline bool  //
wuffs_base__frame_config__opaque_within_bounds(
    const wuffs_base__frame_config* c) {
  return c && c->private_impl.opaque_within_bounds;
}

// wuffs_base__frame_config__overwrite_instead_of_blend returns, for an
// animated image, whether to ignore the previous image state (within the frame
// bounds) when drawing this incremental frame. Equivalently, whether to use
// WUFFS_BASE__PIXEL_BLEND__SRC instead of WUFFS_BASE__PIXEL_BLEND__SRC_OVER.
//
// The WebP spec (https://developers.google.com/speed/webp/docs/riff_container)
// calls this the "Blending method" bit. WebP's "Do not blend" corresponds to
// Wuffs' "overwrite_instead_of_blend".
static inline bool  //
wuffs_base__frame_config__overwrite_instead_of_blend(
    const wuffs_base__frame_config* c) {
  return c && c->private_impl.overwrite_instead_of_blend;
}

static inline wuffs_base__color_u32_argb_premul  //
wuffs_base__frame_config__background_color(const wuffs_base__frame_config* c) {
  return c ? c->private_impl.background_color : 0;
}

#ifdef __cplusplus

inline void  //
wuffs_base__frame_config::set(
    wuffs_base__rect_ie_u32 bounds,
    wuffs_base__flicks duration,
    uint64_t index,
    uint64_t io_position,
    wuffs_base__animation_disposal disposal,
    bool opaque_within_bounds,
    bool overwrite_instead_of_blend,
    wuffs_base__color_u32_argb_premul background_color) {
  wuffs_base__frame_config__set(this, bounds, duration, index, io_position,
                                disposal, opaque_within_bounds,
                                overwrite_instead_of_blend, background_color);
}

inline wuffs_base__rect_ie_u32  //
wuffs_base__frame_config::bounds() const {
  return wuffs_base__frame_config__bounds(this);
}

inline uint32_t  //
wuffs_base__frame_config::width() const {
  return wuffs_base__frame_config__width(this);
}

inline uint32_t  //
wuffs_base__frame_config::height() const {
  return wuffs_base__frame_config__height(this);
}

inline wuffs_base__flicks  //
wuffs_base__frame_config::duration() const {
  return wuffs_base__frame_config__duration(this);
}

inline uint64_t  //
wuffs_base__frame_config::index() const {
  return wuffs_base__frame_config__index(this);
}

inline uint64_t  //
wuffs_base__frame_config::io_position() const {
  return wuffs_base__frame_config__io_position(this);
}

inline wuffs_base__animation_disposal  //
wuffs_base__frame_config::disposal() const {
  return wuffs_base__frame_config__disposal(this);
}

inline bool  //
wuffs_base__frame_config::opaque_within_bounds() const {
  return wuffs_base__frame_config__opaque_within_bounds(this);
}

inline bool  //
wuffs_base__frame_config::overwrite_instead_of_blend() const {
  return wuffs_base__frame_config__overwrite_instead_of_blend(this);
}

inline wuffs_base__color_u32_argb_premul  //
wuffs_base__frame_config::background_color() const {
  return wuffs_base__frame_config__background_color(this);
}

#endif  // __cplusplus

// --------

typedef struct wuffs_base__pixel_buffer__struct {
  wuffs_base__pixel_config pixcfg;

  // Do not access the private_impl's fields directly. There is no API/ABI
  // compatibility or safety guarantee if you do so.
  struct {
    wuffs_base__table_u8 planes[WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX_INCL];
    // TODO: color spaces.
  } private_impl;

#ifdef __cplusplus
  inline wuffs_base__status set_interleaved(
      const wuffs_base__pixel_config* pixcfg,
      wuffs_base__table_u8 primary_memory,
      wuffs_base__slice_u8 palette_memory);
  inline wuffs_base__status set_from_slice(
      const wuffs_base__pixel_config* pixcfg,
      wuffs_base__slice_u8 pixbuf_memory);
  inline wuffs_base__slice_u8 palette();
  inline wuffs_base__slice_u8 palette_or_else(wuffs_base__slice_u8 fallback);
  inline wuffs_base__pixel_format pixel_format() const;
  inline wuffs_base__table_u8 plane(uint32_t p);
  inline wuffs_base__color_u32_argb_premul color_u32_at(uint32_t x,
                                                        uint32_t y) const;
  inline wuffs_base__status set_color_u32_at(
      uint32_t x,
      uint32_t y,
      wuffs_base__color_u32_argb_premul color);
  inline wuffs_base__status set_color_u32_fill_rect(
      wuffs_base__rect_ie_u32 rect,
      wuffs_base__color_u32_argb_premul color);
  inline bool is_opaque();
#endif  // __cplusplus

} wuffs_base__pixel_buffer;

static inline wuffs_base__pixel_buffer  //
wuffs_base__null_pixel_buffer(void) {
  wuffs_base__pixel_buffer ret;
  ret.pixcfg = wuffs_base__null_pixel_config();
  ret.private_impl.planes[0] = wuffs_base__empty_table_u8();
  ret.private_impl.planes[1] = wuffs_base__empty_table_u8();
  ret.private_impl.planes[2] = wuffs_base__empty_table_u8();
  ret.private_impl.planes[3] = wuffs_base__empty_table_u8();
  return ret;
}

static inline wuffs_base__status  //
wuffs_base__pixel_buffer__set_interleaved(
    wuffs_base__pixel_buffer* pb,
    const wuffs_base__pixel_config* pixcfg,
    wuffs_base__table_u8 primary_memory,
    wuffs_base__slice_u8 palette_memory) {
  if (!pb) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  memset(pb, 0, sizeof(*pb));
  if (!pixcfg ||
      wuffs_base__pixel_format__is_planar(&pixcfg->private_impl.pixfmt)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if (wuffs_base__pixel_format__is_indexed(&pixcfg->private_impl.pixfmt) &&
      (palette_memory.len <
       WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH)) {
    return wuffs_base__make_status(
        wuffs_base__error__bad_argument_length_too_short);
  }
  uint32_t bits_per_pixel =
      wuffs_base__pixel_format__bits_per_pixel(&pixcfg->private_impl.pixfmt);
  if ((bits_per_pixel == 0) || ((bits_per_pixel % 8) != 0)) {
    // TODO: support fraction-of-byte pixels, e.g. 1 bit per pixel?
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  uint64_t bytes_per_pixel = bits_per_pixel / 8;

  uint64_t width_in_bytes =
      ((uint64_t)pixcfg->private_impl.width) * bytes_per_pixel;
  if ((width_in_bytes > primary_memory.width) ||
      (pixcfg->private_impl.height > primary_memory.height)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }

  pb->pixcfg = *pixcfg;
  pb->private_impl.planes[0] = primary_memory;
  if (wuffs_base__pixel_format__is_indexed(&pixcfg->private_impl.pixfmt)) {
    wuffs_base__table_u8* tab =
        &pb->private_impl
             .planes[WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE];
    tab->ptr = palette_memory.ptr;
    tab->width = WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH;
    tab->height = 1;
    tab->stride = WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH;
  }
  return wuffs_base__make_status(NULL);
}

static inline wuffs_base__status  //
wuffs_base__pixel_buffer__set_from_slice(wuffs_base__pixel_buffer* pb,
                                         const wuffs_base__pixel_config* pixcfg,
                                         wuffs_base__slice_u8 pixbuf_memory) {
  if (!pb) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  memset(pb, 0, sizeof(*pb));
  if (!pixcfg) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if (wuffs_base__pixel_format__is_planar(&pixcfg->private_impl.pixfmt)) {
    // TODO: support planar pixel formats, concious of pixel subsampling.
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  uint32_t bits_per_pixel =
      wuffs_base__pixel_format__bits_per_pixel(&pixcfg->private_impl.pixfmt);
  if ((bits_per_pixel == 0) || ((bits_per_pixel % 8) != 0)) {
    // TODO: support fraction-of-byte pixels, e.g. 1 bit per pixel?
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  uint64_t bytes_per_pixel = bits_per_pixel / 8;

  uint8_t* ptr = pixbuf_memory.ptr;
  uint64_t len = pixbuf_memory.len;
  if (wuffs_base__pixel_format__is_indexed(&pixcfg->private_impl.pixfmt)) {
    // Split a WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH byte
    // chunk (1024 bytes = 256 palette entries × 4 bytes per entry) from the
    // start of pixbuf_memory. We split from the start, not the end, so that
    // the both chunks' pointers have the same alignment as the original
    // pointer, up to an alignment of 1024.
    if (len < WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
      return wuffs_base__make_status(
          wuffs_base__error__bad_argument_length_too_short);
    }
    wuffs_base__table_u8* tab =
        &pb->private_impl
             .planes[WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE];
    tab->ptr = ptr;
    tab->width = WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH;
    tab->height = 1;
    tab->stride = WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH;
    ptr += WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH;
    len -= WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH;
  }

  uint64_t wh = ((uint64_t)pixcfg->private_impl.width) *
                ((uint64_t)pixcfg->private_impl.height);
  size_t width = (size_t)(pixcfg->private_impl.width);
  if ((wh > (UINT64_MAX / bytes_per_pixel)) ||
      (width > (SIZE_MAX / bytes_per_pixel))) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  wh *= bytes_per_pixel;
  width = ((size_t)(width * bytes_per_pixel));
  if (wh > len) {
    return wuffs_base__make_status(
        wuffs_base__error__bad_argument_length_too_short);
  }

  pb->pixcfg = *pixcfg;
  wuffs_base__table_u8* tab = &pb->private_impl.planes[0];
  tab->ptr = ptr;
  tab->width = width;
  tab->height = pixcfg->private_impl.height;
  tab->stride = width;
  return wuffs_base__make_status(NULL);
}

// wuffs_base__pixel_buffer__palette returns the palette color data. If
// non-empty, it will have length
// WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH.
static inline wuffs_base__slice_u8  //
wuffs_base__pixel_buffer__palette(wuffs_base__pixel_buffer* pb) {
  if (pb &&
      wuffs_base__pixel_format__is_indexed(&pb->pixcfg.private_impl.pixfmt)) {
    wuffs_base__table_u8* tab =
        &pb->private_impl
             .planes[WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE];
    if ((tab->width ==
         WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) &&
        (tab->height == 1)) {
      return wuffs_base__make_slice_u8(
          tab->ptr, WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH);
    }
  }
  return wuffs_base__empty_slice_u8();
}

static inline wuffs_base__slice_u8  //
wuffs_base__pixel_buffer__palette_or_else(wuffs_base__pixel_buffer* pb,
                                          wuffs_base__slice_u8 fallback) {
  if (pb &&
      wuffs_base__pixel_format__is_indexed(&pb->pixcfg.private_impl.pixfmt)) {
    wuffs_base__table_u8* tab =
        &pb->private_impl
             .planes[WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE];
    if ((tab->width ==
         WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) &&
        (tab->height == 1)) {
      return wuffs_base__make_slice_u8(
          tab->ptr, WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH);
    }
  }
  return fallback;
}

static inline wuffs_base__pixel_format  //
wuffs_base__pixel_buffer__pixel_format(const wuffs_base__pixel_buffer* pb) {
  if (pb) {
    return pb->pixcfg.private_impl.pixfmt;
  }
  return wuffs_base__make_pixel_format(WUFFS_BASE__PIXEL_FORMAT__INVALID);
}

static inline wuffs_base__table_u8  //
wuffs_base__pixel_buffer__plane(wuffs_base__pixel_buffer* pb, uint32_t p) {
  if (pb && (p < WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX_INCL)) {
    return pb->private_impl.planes[p];
  }

  wuffs_base__table_u8 ret;
  ret.ptr = NULL;
  ret.width = 0;
  ret.height = 0;
  ret.stride = 0;
  return ret;
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__color_u32_argb_premul  //
wuffs_base__pixel_buffer__color_u32_at(const wuffs_base__pixel_buffer* pb,
                                       uint32_t x,
                                       uint32_t y);

WUFFS_BASE__MAYBE_STATIC wuffs_base__status  //
wuffs_base__pixel_buffer__set_color_u32_at(
    wuffs_base__pixel_buffer* pb,
    uint32_t x,
    uint32_t y,
    wuffs_base__color_u32_argb_premul color);

WUFFS_BASE__MAYBE_STATIC wuffs_base__status  //
wuffs_base__pixel_buffer__set_color_u32_fill_rect(
    wuffs_base__pixel_buffer* pb,
    wuffs_base__rect_ie_u32 rect,
    wuffs_base__color_u32_argb_premul color);

WUFFS_BASE__MAYBE_STATIC bool  //
wuffs_base__pixel_buffer__is_opaque(const wuffs_base__pixel_buffer* pb);

#ifdef __cplusplus

inline wuffs_base__status  //
wuffs_base__pixel_buffer::set_interleaved(
    const wuffs_base__pixel_config* pixcfg_arg,
    wuffs_base__table_u8 primary_memory,
    wuffs_base__slice_u8 palette_memory) {
  return wuffs_base__pixel_buffer__set_interleaved(
      this, pixcfg_arg, primary_memory, palette_memory);
}

inline wuffs_base__status  //
wuffs_base__pixel_buffer::set_from_slice(
    const wuffs_base__pixel_config* pixcfg_arg,
    wuffs_base__slice_u8 pixbuf_memory) {
  return wuffs_base__pixel_buffer__set_from_slice(this, pixcfg_arg,
                                                  pixbuf_memory);
}

inline wuffs_base__slice_u8  //
wuffs_base__pixel_buffer::palette() {
  return wuffs_base__pixel_buffer__palette(this);
}

inline wuffs_base__slice_u8  //
wuffs_base__pixel_buffer::palette_or_else(wuffs_base__slice_u8 fallback) {
  return wuffs_base__pixel_buffer__palette_or_else(this, fallback);
}

inline wuffs_base__pixel_format  //
wuffs_base__pixel_buffer::pixel_format() const {
  return wuffs_base__pixel_buffer__pixel_format(this);
}

inline wuffs_base__table_u8  //
wuffs_base__pixel_buffer::plane(uint32_t p) {
  return wuffs_base__pixel_buffer__plane(this, p);
}

inline wuffs_base__color_u32_argb_premul  //
wuffs_base__pixel_buffer::color_u32_at(uint32_t x, uint32_t y) const {
  return wuffs_base__pixel_buffer__color_u32_at(this, x, y);
}

inline wuffs_base__status  //
wuffs_base__pixel_buffer::set_color_u32_at(
    uint32_t x,
    uint32_t y,
    wuffs_base__color_u32_argb_premul color) {
  return wuffs_base__pixel_buffer__set_color_u32_at(this, x, y, color);
}

inline wuffs_base__status  //
wuffs_base__pixel_buffer::set_color_u32_fill_rect(
    wuffs_base__rect_ie_u32 rect,
    wuffs_base__color_u32_argb_premul color) {
  return wuffs_base__pixel_buffer__set_color_u32_fill_rect(this, rect, color);
}

inline bool  //
wuffs_base__pixel_buffer::is_opaque() {
  return wuffs_base__pixel_buffer__is_opaque(this);
}

#endif  // __cplusplus

// --------

typedef struct wuffs_base__decode_frame_options__struct {
  // Do not access the private_impl's fields directly. There is no API/ABI
  // compatibility or safety guarantee if you do so.
  struct {
    uint8_t TODO;
  } private_impl;

#ifdef __cplusplus
#endif  // __cplusplus

} wuffs_base__decode_frame_options;

#ifdef __cplusplus

#endif  // __cplusplus

// --------

// wuffs_base__pixel_palette__closest_element returns the index of the palette
// element that minimizes the sum of squared differences of the four ARGB
// channels, working in premultiplied alpha. Ties favor the smaller index.
//
// The palette_slice.len may equal (N*4), for N less than 256, which means that
// only the first N palette elements are considered. It returns 0 when N is 0.
//
// Applying this function on a per-pixel basis will not produce whole-of-image
// dithering.
WUFFS_BASE__MAYBE_STATIC uint8_t  //
wuffs_base__pixel_palette__closest_element(
    wuffs_base__slice_u8 palette_slice,
    wuffs_base__pixel_format palette_format,
    wuffs_base__color_u32_argb_premul c);

// --------

// TODO: should the func type take restrict pointers?
typedef uint64_t (*wuffs_base__pixel_swizzler__func)(uint8_t* dst_ptr,
                                                     size_t dst_len,
                                                     uint8_t* dst_palette_ptr,
                                                     size_t dst_palette_len,
                                                     const uint8_t* src_ptr,
                                                     size_t src_len);

typedef uint64_t (*wuffs_base__pixel_swizzler__transparent_black_func)(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    uint64_t num_pixels,
    uint32_t dst_pixfmt_bytes_per_pixel);

typedef struct wuffs_base__pixel_swizzler__struct {
  // Do not access the private_impl's fields directly. There is no API/ABI
  // compatibility or safety guarantee if you do so.
  struct {
    wuffs_base__pixel_swizzler__func func;
    wuffs_base__pixel_swizzler__transparent_black_func transparent_black_func;
    uint32_t dst_pixfmt_bytes_per_pixel;
    uint32_t src_pixfmt_bytes_per_pixel;
  } private_impl;

#ifdef __cplusplus
  inline wuffs_base__status prepare(wuffs_base__pixel_format dst_pixfmt,
                                    wuffs_base__slice_u8 dst_palette,
                                    wuffs_base__pixel_format src_pixfmt,
                                    wuffs_base__slice_u8 src_palette,
                                    wuffs_base__pixel_blend blend);
  inline uint64_t swizzle_interleaved_from_slice(
      wuffs_base__slice_u8 dst,
      wuffs_base__slice_u8 dst_palette,
      wuffs_base__slice_u8 src) const;
#endif  // __cplusplus

} wuffs_base__pixel_swizzler;

// wuffs_base__pixel_swizzler__prepare readies the pixel swizzler so that its
// other methods may be called.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__PIXCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__status  //
wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p,
                                    wuffs_base__pixel_format dst_pixfmt,
                                    wuffs_base__slice_u8 dst_palette,
                                    wuffs_base__pixel_format src_pixfmt,
                                    wuffs_base__slice_u8 src_palette,
                                    wuffs_base__pixel_blend blend);

// wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice converts pixels
// from a source format to a destination format.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__PIXCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC uint64_t  //
wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(
    const wuffs_base__pixel_swizzler* p,
    wuffs_base__slice_u8 dst,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src);

#ifdef __cplusplus

inline wuffs_base__status  //
wuffs_base__pixel_swizzler::prepare(wuffs_base__pixel_format dst_pixfmt,
                                    wuffs_base__slice_u8 dst_palette,
                                    wuffs_base__pixel_format src_pixfmt,
                                    wuffs_base__slice_u8 src_palette,
                                    wuffs_base__pixel_blend blend) {
  return wuffs_base__pixel_swizzler__prepare(this, dst_pixfmt, dst_palette,
                                             src_pixfmt, src_palette, blend);
}

uint64_t  //
wuffs_base__pixel_swizzler::swizzle_interleaved_from_slice(
    wuffs_base__slice_u8 dst,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src) const {
  return wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(
      this, dst, dst_palette, src);
}

#endif  // __cplusplus

// ---------------- String Conversions

// Options (bitwise or'ed together) for wuffs_base__parse_number_xxx
// functions. The XXX options apply to both integer and floating point. The FXX
// options apply only to floating point.

#define WUFFS_BASE__PARSE_NUMBER_XXX__DEFAULT_OPTIONS ((uint32_t)0x00000000)

// WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_MULTIPLE_LEADING_ZEROES means to accept
// inputs like "00", "0644" and "00.7". By default, they are rejected.
#define WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_MULTIPLE_LEADING_ZEROES \
  ((uint32_t)0x00000001)

// WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES means to accept inputs like
// "1__2" and "_3.141_592". By default, they are rejected.
#define WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES ((uint32_t)0x00000002)

// WUFFS_BASE__PARSE_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA means to accept
// "1,5" and not "1.5" as one-and-a-half.
//
// If the caller wants to accept either, it is responsible for canonicalizing
// the input before calling wuffs_base__parse_number_fxx. The caller also has
// more context on e.g. exactly how to treat something like "$1,234".
#define WUFFS_BASE__PARSE_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA \
  ((uint32_t)0x00000010)

// WUFFS_BASE__PARSE_NUMBER_FXX__REJECT_INF_AND_NAN means to reject inputs that
// would lead to infinite or Not-a-Number floating point values. By default,
// they are accepted.
//
// This affects the literal "inf" as input, but also affects inputs like
// "1e999" that would overflow double-precision floating point.
#define WUFFS_BASE__PARSE_NUMBER_FXX__REJECT_INF_AND_NAN ((uint32_t)0x00000020)

// --------

// Options (bitwise or'ed together) for wuffs_base__render_number_xxx
// functions. The XXX options apply to both integer and floating point. The FXX
// options apply only to floating point.

#define WUFFS_BASE__RENDER_NUMBER_XXX__DEFAULT_OPTIONS ((uint32_t)0x00000000)

// WUFFS_BASE__RENDER_NUMBER_XXX__ALIGN_RIGHT means to render to the right side
// (higher indexes) of the destination slice, leaving any untouched bytes on
// the left side (lower indexes). The default is vice versa: rendering on the
// left with slack on the right.
#define WUFFS_BASE__RENDER_NUMBER_XXX__ALIGN_RIGHT ((uint32_t)0x00000100)

// WUFFS_BASE__RENDER_NUMBER_XXX__LEADING_PLUS_SIGN means to render the leading
// "+" for non-negative numbers: "+0" and "+12.3" instead of "0" and "12.3".
#define WUFFS_BASE__RENDER_NUMBER_XXX__LEADING_PLUS_SIGN ((uint32_t)0x00000200)

// WUFFS_BASE__RENDER_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA means to render
// one-and-a-half as "1,5" instead of "1.5".
#define WUFFS_BASE__RENDER_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA \
  ((uint32_t)0x00001000)

// WUFFS_BASE__RENDER_NUMBER_FXX__EXPONENT_ETC means whether to never
// (EXPONENT_ABSENT, equivalent to printf's "%f") or to always
// (EXPONENT_PRESENT, equivalent to printf's "%e") render a floating point
// number as "1.23e+05" instead of "123000".
//
// Having both bits set is the same has having neither bit set, where the
// notation used depends on whether the exponent is sufficiently large: "0.5"
// is preferred over "5e-01" but "5e-09" is preferred over "0.000000005".
#define WUFFS_BASE__RENDER_NUMBER_FXX__EXPONENT_ABSENT ((uint32_t)0x00002000)
#define WUFFS_BASE__RENDER_NUMBER_FXX__EXPONENT_PRESENT ((uint32_t)0x00004000)

// WUFFS_BASE__RENDER_NUMBER_FXX__JUST_ENOUGH_PRECISION means to render the
// smallest number of digits so that parsing the resultant string will recover
// the same double-precision floating point number.
//
// For example, double-precision cannot distinguish between 0.3 and
// 0.299999999999999988897769753748434595763683319091796875, so when this bit
// is set, rendering the latter will produce "0.3" but rendering
// 0.3000000000000000444089209850062616169452667236328125 will produce
// "0.30000000000000004".
#define WUFFS_BASE__RENDER_NUMBER_FXX__JUST_ENOUGH_PRECISION \
  ((uint32_t)0x00008000)

// ---------------- IEEE 754 Floating Point

// wuffs_base__ieee_754_bit_representation__etc converts between a double
// precision numerical value and its IEEE 754 representations:
//  - 16-bit: 1 sign bit,  5 exponent bits, 10 explicit significand bits.
//  - 32-bit: 1 sign bit,  8 exponent bits, 23 explicit significand bits.
//  - 64-bit: 1 sign bit, 11 exponent bits, 52 explicit significand bits.
//
// For example, it converts between:
//  - +1.0 and 0x3C00, 0x3F80_0000 or 0x3FF0_0000_0000_0000.
//  - +5.5 and 0x4580, 0x40B0_0000 or 0x4016_0000_0000_0000.
//  - -inf and 0xFC00, 0xFF80_0000 or 0xFFF0_0000_0000_0000.
//
// Converting from f64 to shorter formats (f16 or f32, represented in C as
// uint16_t and uint32_t) may be lossy. Such functions have names that look
// like etc_truncate, as converting finite numbers produce equal or smaller
// (closer-to-zero) finite numbers. For example, 1048576.0 is a perfectly valid
// f64 number, but converting it to a f16 (with truncation) produces 65504.0,
// the largest finite f16 number. Truncating a f64-typed value d to f32 does
// not always produce the same result as the C-style cast ((float)d), as
// casting can convert from finite numbers to infinite ones.
//
// Converting infinities or NaNs produces infinities or NaNs and always report
// no loss, even though there a multiple NaN representations so that round-
// tripping a f64-typed NaN may produce a different 64 bits. Nonetheless, the
// etc_truncate functions preserve a NaN's "quiet vs signaling" bit.
//
// See https://en.wikipedia.org/wiki/Double-precision_floating-point_format

typedef struct wuffs_base__lossy_value_u16__struct {
  uint16_t value;
  bool lossy;
} wuffs_base__lossy_value_u16;

typedef struct wuffs_base__lossy_value_u32__struct {
  uint32_t value;
  bool lossy;
} wuffs_base__lossy_value_u32;

WUFFS_BASE__MAYBE_STATIC wuffs_base__lossy_value_u16  //
wuffs_base__ieee_754_bit_representation__from_f64_to_u16_truncate(double f);

WUFFS_BASE__MAYBE_STATIC wuffs_base__lossy_value_u32  //
wuffs_base__ieee_754_bit_representation__from_f64_to_u32_truncate(double f);

static inline uint64_t  //
wuffs_base__ieee_754_bit_representation__from_f64_to_u64(double f) {
  uint64_t u = 0;
  if (sizeof(uint64_t) == sizeof(double)) {
    memcpy(&u, &f, sizeof(uint64_t));
  }
  return u;
}

static inline double  //
wuffs_base__ieee_754_bit_representation__from_u16_to_f64(uint16_t u) {
  uint64_t v = ((uint64_t)(u & 0x8000)) << 48;

  do {
    uint64_t exp = (u >> 10) & 0x1F;
    uint64_t man = u & 0x3FF;
    if (exp == 0x1F) {  // Infinity or NaN.
      exp = 2047;
    } else if (exp != 0) {  // Normal.
      exp += 1008;          // 1008 = 1023 - 15, the difference in biases.
    } else if (man != 0) {  // Subnormal but non-zero.
      uint32_t clz = wuffs_base__count_leading_zeroes_u64(man);
      exp = 1062 - clz;  // 1062 = 1008 + 64 - 10.
      man = 0x3FF & (man << (clz - 53));
    } else {  // Zero.
      break;
    }
    v |= (exp << 52) | (man << 42);
  } while (0);

  double f = 0;
  if (sizeof(uint64_t) == sizeof(double)) {
    memcpy(&f, &v, sizeof(uint64_t));
  }
  return f;
}

static inline double  //
wuffs_base__ieee_754_bit_representation__from_u32_to_f64(uint32_t u) {
  float f = 0;
  if (sizeof(uint32_t) == sizeof(float)) {
    memcpy(&f, &u, sizeof(uint32_t));
  }
  return (double)f;
}

static inline double  //
wuffs_base__ieee_754_bit_representation__from_u64_to_f64(uint64_t u) {
  double f = 0;
  if (sizeof(uint64_t) == sizeof(double)) {
    memcpy(&f, &u, sizeof(uint64_t));
  }
  return f;
}

// ---------------- Parsing and Rendering Numbers

// wuffs_base__parse_number_f64 parses the floating point number in s. For
// example, if s contains the bytes "1.5" then it will return the double 1.5.
//
// It returns an error if s does not contain a floating point number.
//
// It does not necessarily return an error if the conversion is lossy, e.g. if
// s is "0.3", which double-precision floating point cannot represent exactly.
//
// Similarly, the returned value may be infinite (and no error returned) even
// if s was not "inf", when the input is nominally finite but sufficiently
// larger than DBL_MAX, about 1.8e+308.
//
// It is similar to the C standard library's strtod function, but:
//  - Errors are returned in-band (in a result type), not out-of-band (errno).
//  - It takes a slice (a pointer and length), not a NUL-terminated C string.
//  - It does not take an optional endptr argument. It does not allow a partial
//    parse: it returns an error unless all of s is consumed.
//  - It does not allow whitespace, leading or otherwise.
//  - It does not allow hexadecimal floating point numbers.
//  - It is not affected by i18n / l10n settings such as environment variables.
//
// The options argument can change these, but by default, it:
//  - Allows "inf", "+Infinity" and "-NAN", case insensitive. Similarly,
//    without an explicit opt-out, it would successfully parse "1e999" as
//    infinity, even though it overflows double-precision floating point.
//  - Rejects underscores. With an explicit opt-in, "_3.141_592" would
//    successfully parse as an approximation to π.
//  - Rejects unnecessary leading zeroes: "00", "0644" and "00.7".
//  - Uses a dot '1.5' instead of a comma '1,5' for the decimal separator.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__FLOATCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__result_f64  //
wuffs_base__parse_number_f64(wuffs_base__slice_u8 s, uint32_t options);

// wuffs_base__parse_number_i64 parses the ASCII integer in s. For example, if
// s contains the bytes "-123" then it will return the int64_t -123.
//
// It returns an error if s does not contain an integer or if the integer
// within would overflow an int64_t.
//
// It is similar to wuffs_base__parse_number_u64 but it returns a signed
// integer, not an unsigned integer. It also allows a leading '+' or '-'.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__result_i64  //
wuffs_base__parse_number_i64(wuffs_base__slice_u8 s, uint32_t options);

// wuffs_base__parse_number_u64 parses the ASCII integer in s. For example, if
// s contains the bytes "123" then it will return the uint64_t 123.
//
// It returns an error if s does not contain an integer or if the integer
// within would overflow a uint64_t.
//
// It is similar to the C standard library's strtoull function, but:
//  - Errors are returned in-band (in a result type), not out-of-band (errno).
//  - It takes a slice (a pointer and length), not a NUL-terminated C string.
//  - It does not take an optional endptr argument. It does not allow a partial
//    parse: it returns an error unless all of s is consumed.
//  - It does not allow whitespace, leading or otherwise.
//  - It does not allow a leading '+' or '-'.
//  - It does not take a base argument (e.g. base 10 vs base 16). Instead, it
//    always accepts both decimal (e.g "1234", "0d5678") and hexadecimal (e.g.
//    "0x9aBC"). The caller is responsible for prior filtering of e.g. hex
//    numbers if they are unwanted. For example, Wuffs' JSON decoder will only
//    produce a wuffs_base__token for decimal numbers, not hexadecimal.
//  - It is not affected by i18n / l10n settings such as environment variables.
//
// The options argument can change these, but by default, it:
//  - Rejects underscores. With an explicit opt-in, "__0D_1_002" would
//    successfully parse as "one thousand and two". Underscores are still
//    rejected inside the optional 2-byte opening "0d" or "0X" that denotes
//    base-10 or base-16.
//  - Rejects unnecessary leading zeroes: "00" and "0644".
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__result_u64  //
wuffs_base__parse_number_u64(wuffs_base__slice_u8 s, uint32_t options);

// --------

// WUFFS_BASE__I64__BYTE_LENGTH__MAX_INCL is the string length of
// "-9223372036854775808" and "+9223372036854775807", INT64_MIN and INT64_MAX.
#define WUFFS_BASE__I64__BYTE_LENGTH__MAX_INCL 20

// WUFFS_BASE__U64__BYTE_LENGTH__MAX_INCL is the string length of
// "+18446744073709551615", UINT64_MAX.
#define WUFFS_BASE__U64__BYTE_LENGTH__MAX_INCL 21

// wuffs_base__render_number_f64 writes the decimal encoding of x to dst and
// returns the number of bytes written. If dst is shorter than the entire
// encoding, it returns 0 (and no bytes are written).
//
// For those familiar with C's printf or Go's fmt.Printf functions:
//  - "%e" means the WUFFS_BASE__RENDER_NUMBER_FXX__EXPONENT_PRESENT option.
//  - "%f" means the WUFFS_BASE__RENDER_NUMBER_FXX__EXPONENT_ABSENT  option.
//  - "%g" means neither or both bits are set.
//
// The precision argument controls the number of digits rendered, excluding the
// exponent (the "e+05" in "1.23e+05"):
//  - for "%e" and "%f" it is the number of digits after the decimal separator,
//  - for "%g" it is the number of significant digits (and trailing zeroes are
//    removed).
//
// A precision of 6 gives similar output to printf's defaults.
//
// A precision greater than 4095 is equivalent to 4095.
//
// The precision argument is ignored when the
// WUFFS_BASE__RENDER_NUMBER_FXX__JUST_ENOUGH_PRECISION option is set. This is
// similar to Go's strconv.FormatFloat with a negative (i.e. non-sensical)
// precision, but there is no corresponding feature in C's printf.
//
// Extreme values of x will be rendered as "NaN", "Inf" (or "+Inf" if the
// WUFFS_BASE__RENDER_NUMBER_XXX__LEADING_PLUS_SIGN option is set) or "-Inf".
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__FLOATCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__render_number_f64(wuffs_base__slice_u8 dst,
                              double x,
                              uint32_t precision,
                              uint32_t options);

// wuffs_base__render_number_i64 writes the decimal encoding of x to dst and
// returns the number of bytes written. If dst is shorter than the entire
// encoding, it returns 0 (and no bytes are written).
//
// dst will never be too short if its length is at least 20, also known as
// WUFFS_BASE__I64__BYTE_LENGTH__MAX_INCL.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__render_number_i64(wuffs_base__slice_u8 dst,
                              int64_t x,
                              uint32_t options);

// wuffs_base__render_number_u64 writes the decimal encoding of x to dst and
// returns the number of bytes written. If dst is shorter than the entire
// encoding, it returns 0 (and no bytes are written).
//
// dst will never be too short if its length is at least 21, also known as
// WUFFS_BASE__U64__BYTE_LENGTH__MAX_INCL.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__render_number_u64(wuffs_base__slice_u8 dst,
                              uint64_t x,
                              uint32_t options);

// ---------------- Base-16

// Options (bitwise or'ed together) for wuffs_base__base_16__xxx functions.

#define WUFFS_BASE__BASE_16__DEFAULT_OPTIONS ((uint32_t)0x00000000)

// wuffs_base__base_16__decode2 converts "6A6b" to "jk", where e.g. 'j' is
// U+006A. There are 2 src bytes for every dst byte.
//
// It assumes that the src bytes are two hexadecimal digits (0-9, A-F, a-f),
// repeated. It may write nonsense bytes if not, although it will not read or
// write out of bounds.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_16__decode2(wuffs_base__slice_u8 dst,
                             wuffs_base__slice_u8 src,
                             bool src_closed,
                             uint32_t options);

// wuffs_base__base_16__decode4 converts both "\\x6A\\x6b" and "??6a??6B" to
// "jk", where e.g. 'j' is U+006A. There are 4 src bytes for every dst byte.
//
// It assumes that the src bytes are two ignored bytes and then two hexadecimal
// digits (0-9, A-F, a-f), repeated. It may write nonsense bytes if not,
// although it will not read or write out of bounds.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_16__decode4(wuffs_base__slice_u8 dst,
                             wuffs_base__slice_u8 src,
                             bool src_closed,
                             uint32_t options);

// wuffs_base__base_16__encode2 converts "jk" to "6A6B", where e.g. 'j' is
// U+006A. There are 2 dst bytes for every src byte.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_16__encode2(wuffs_base__slice_u8 dst,
                             wuffs_base__slice_u8 src,
                             bool src_closed,
                             uint32_t options);

// wuffs_base__base_16__encode4 converts "jk" to "\\x6A\\x6B", where e.g. 'j'
// is U+006A. There are 4 dst bytes for every src byte.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_16__encode4(wuffs_base__slice_u8 dst,
                             wuffs_base__slice_u8 src,
                             bool src_closed,
                             uint32_t options);

// ---------------- Base-64

// Options (bitwise or'ed together) for wuffs_base__base_64__xxx functions.

#define WUFFS_BASE__BASE_64__DEFAULT_OPTIONS ((uint32_t)0x00000000)

// WUFFS_BASE__BASE_64__DECODE_ALLOW_PADDING means that, when decoding base-64,
// the input may (but does not need to) be padded with '=' bytes so that the
// overall encoded length in bytes is a multiple of 4. A successful decoding
// will return a num_src that includes those padding bytes.
//
// Excess padding (e.g. three final '='s) will be rejected as bad data.
#define WUFFS_BASE__BASE_64__DECODE_ALLOW_PADDING ((uint32_t)0x00000001)

// WUFFS_BASE__BASE_64__ENCODE_EMIT_PADDING means that, when encoding base-64,
// the output will be padded with '=' bytes so that the overall encoded length
// in bytes is a multiple of 4.
#define WUFFS_BASE__BASE_64__ENCODE_EMIT_PADDING ((uint32_t)0x00000002)

// WUFFS_BASE__BASE_64__URL_ALPHABET means that, for base-64, the URL-friendly
// and file-name-friendly alphabet be used, as per RFC 4648 section 5. When
// this option bit is off, the standard alphabet from section 4 is used.
#define WUFFS_BASE__BASE_64__URL_ALPHABET ((uint32_t)0x00000100)

// wuffs_base__base_64__decode transforms base-64 encoded bytes from src to
// arbitrary bytes in dst.
//
// It will not permit line breaks or other whitespace in src. Filtering those
// out is the responsibility of the caller.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_64__decode(wuffs_base__slice_u8 dst,
                            wuffs_base__slice_u8 src,
                            bool src_closed,
                            uint32_t options);

// wuffs_base__base_64__encode transforms arbitrary bytes from src to base-64
// encoded bytes in dst.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__INTCONV sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_64__encode(wuffs_base__slice_u8 dst,
                            wuffs_base__slice_u8 src,
                            bool src_closed,
                            uint32_t options);

// ---------------- Unicode and UTF-8

#define WUFFS_BASE__UNICODE_CODE_POINT__MIN_INCL 0x00000000
#define WUFFS_BASE__UNICODE_CODE_POINT__MAX_INCL 0x0010FFFF

#define WUFFS_BASE__UNICODE_REPLACEMENT_CHARACTER 0x0000FFFD

#define WUFFS_BASE__UNICODE_SURROGATE__MIN_INCL 0x0000D800
#define WUFFS_BASE__UNICODE_SURROGATE__MAX_INCL 0x0000DFFF

#define WUFFS_BASE__ASCII__MIN_INCL 0x00
#define WUFFS_BASE__ASCII__MAX_INCL 0x7F

#define WUFFS_BASE__UTF_8__BYTE_LENGTH__MIN_INCL 1
#define WUFFS_BASE__UTF_8__BYTE_LENGTH__MAX_INCL 4

#define WUFFS_BASE__UTF_8__BYTE_LENGTH_1__CODE_POINT__MIN_INCL 0x00000000
#define WUFFS_BASE__UTF_8__BYTE_LENGTH_1__CODE_POINT__MAX_INCL 0x0000007F
#define WUFFS_BASE__UTF_8__BYTE_LENGTH_2__CODE_POINT__MIN_INCL 0x00000080
#define WUFFS_BASE__UTF_8__BYTE_LENGTH_2__CODE_POINT__MAX_INCL 0x000007FF
#define WUFFS_BASE__UTF_8__BYTE_LENGTH_3__CODE_POINT__MIN_INCL 0x00000800
#define WUFFS_BASE__UTF_8__BYTE_LENGTH_3__CODE_POINT__MAX_INCL 0x0000FFFF
#define WUFFS_BASE__UTF_8__BYTE_LENGTH_4__CODE_POINT__MIN_INCL 0x00010000
#define WUFFS_BASE__UTF_8__BYTE_LENGTH_4__CODE_POINT__MAX_INCL 0x0010FFFF

// --------

// wuffs_base__utf_8__next__output is the type returned by
// wuffs_base__utf_8__next.
typedef struct wuffs_base__utf_8__next__output__struct {
  uint32_t code_point;
  uint32_t byte_length;

#ifdef __cplusplus
  inline bool is_valid() const;
#endif  // __cplusplus

} wuffs_base__utf_8__next__output;

static inline wuffs_base__utf_8__next__output  //
wuffs_base__make_utf_8__next__output(uint32_t code_point,
                                     uint32_t byte_length) {
  wuffs_base__utf_8__next__output ret;
  ret.code_point = code_point;
  ret.byte_length = byte_length;
  return ret;
}

static inline bool  //
wuffs_base__utf_8__next__output__is_valid(
    const wuffs_base__utf_8__next__output* o) {
  if (o) {
    uint32_t cp = o->code_point;
    switch (o->byte_length) {
      case 1:
        return (cp <= 0x7F);
      case 2:
        return (0x080 <= cp) && (cp <= 0x7FF);
      case 3:
        // Avoid the 0xD800 ..= 0xDFFF surrogate range.
        return ((0x0800 <= cp) && (cp <= 0xD7FF)) ||
               ((0xE000 <= cp) && (cp <= 0xFFFF));
      case 4:
        return (0x00010000 <= cp) && (cp <= 0x0010FFFF);
    }
  }
  return false;
}

#ifdef __cplusplus

inline bool  //
wuffs_base__utf_8__next__output::is_valid() const {
  return wuffs_base__utf_8__next__output__is_valid(this);
}

#endif  // __cplusplus

// --------

// wuffs_base__utf_8__encode writes the UTF-8 encoding of code_point to s and
// returns the number of bytes written. If code_point is invalid, or if s is
// shorter than the entire encoding, it returns 0 (and no bytes are written).
//
// s will never be too short if its length is at least 4, also known as
// WUFFS_BASE__UTF_8__BYTE_LENGTH__MAX_INCL.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__UTF8 sub-module, not just
// WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__utf_8__encode(wuffs_base__slice_u8 dst, uint32_t code_point);

// wuffs_base__utf_8__next returns the next UTF-8 code point (and that code
// point's byte length) at the start of the read-only slice (s_ptr, s_len).
//
// There are exactly two cases in which this function returns something where
// wuffs_base__utf_8__next__output__is_valid is false:
//  - If s is empty then it returns {.code_point=0, .byte_length=0}.
//  - If s is non-empty and starts with invalid UTF-8 then it returns
//    {.code_point=WUFFS_BASE__UNICODE_REPLACEMENT_CHARACTER, .byte_length=1}.
//
// Otherwise, it returns something where
// wuffs_base__utf_8__next__output__is_valid is true.
//
// In any case, it always returns an output that satisfies both of:
//  - (output.code_point  <= WUFFS_BASE__UNICODE_CODE_POINT__MAX_INCL).
//  - (output.byte_length <= s_len).
//
// If s is a sub-slice of a larger slice of valid UTF-8, but that sub-slice
// boundary occurs in the middle of a multi-byte UTF-8 encoding of a single
// code point, then this function may return something invalid. It is the
// caller's responsibility to split on or otherwise manage UTF-8 boundaries.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__UTF8 sub-module, not just
// WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__utf_8__next__output  //
wuffs_base__utf_8__next(const uint8_t* s_ptr, size_t s_len);

// wuffs_base__utf_8__next_from_end is like wuffs_base__utf_8__next except that
// it looks at the end of (s_ptr, s_len) instead of the start.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__UTF8 sub-module, not just
// WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC wuffs_base__utf_8__next__output  //
wuffs_base__utf_8__next_from_end(const uint8_t* s_ptr, size_t s_len);

// wuffs_base__utf_8__longest_valid_prefix returns the largest n such that the
// sub-slice s[..n] is valid UTF-8, where s is the read-only slice (s_ptr,
// s_len).
//
// In particular, it returns s_len if and only if all of s is valid UTF-8.
//
// If s is a sub-slice of a larger slice of valid UTF-8, but that sub-slice
// boundary occurs in the middle of a multi-byte UTF-8 encoding of a single
// code point, then this function will return less than s_len. It is the
// caller's responsibility to split on or otherwise manage UTF-8 boundaries.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__UTF8 sub-module, not just
// WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__utf_8__longest_valid_prefix(const uint8_t* s_ptr, size_t s_len);

// wuffs_base__ascii__longest_valid_prefix returns the largest n such that the
// sub-slice s[..n] is valid ASCII, where s is the read-only slice (s_ptr,
// s_len).
//
// In particular, it returns s_len if and only if all of s is valid ASCII.
// Equivalently, when none of the bytes in s have the 0x80 high bit set.
//
// For modular builds that divide the base module into sub-modules, using this
// function requires the WUFFS_CONFIG__MODULE__BASE__UTF8 sub-module, not just
// WUFFS_CONFIG__MODULE__BASE__CORE.
WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__ascii__longest_valid_prefix(const uint8_t* s_ptr, size_t s_len);

// ---------------- Interface Declarations.

// For modular builds that divide the base module into sub-modules, using these
// functions require the WUFFS_CONFIG__MODULE__BASE__INTERFACES sub-module, not
// just WUFFS_CONFIG__MODULE__BASE__CORE.

// --------

extern const char wuffs_base__hasher_u32__vtable_name[];

typedef struct wuffs_base__hasher_u32__func_ptrs__struct {
  uint32_t (*checksum_u32)(
    const void* self);
  uint64_t (*get_quirk)(
    const void* self,
    uint32_t a_key);
  wuffs_base__status (*set_quirk)(
    void* self,
    uint32_t a_key,
    uint64_t a_value);
  wuffs_base__empty_struct (*update)(
    void* self,
    wuffs_base__slice_u8 a_x);
  uint32_t (*update_u32)(
    void* self,
    wuffs_base__slice_u8 a_x);
} wuffs_base__hasher_u32__func_ptrs;

typedef struct wuffs_base__hasher_u32__struct wuffs_base__hasher_u32;

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_base__hasher_u32__checksum_u32(
    const wuffs_base__hasher_u32* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_u32__get_quirk(
    const wuffs_base__hasher_u32* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__hasher_u32__set_quirk(
    wuffs_base__hasher_u32* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_base__hasher_u32__update(
    wuffs_base__hasher_u32* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_base__hasher_u32__update_u32(
    wuffs_base__hasher_u32* self,
    wuffs_base__slice_u8 a_x);

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_base__hasher_u32__struct {
  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable first_vtable;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_base__hasher_u32, wuffs_unique_ptr_deleter>;
#endif

  inline uint32_t
  checksum_u32() const {
    return wuffs_base__hasher_u32__checksum_u32(this);
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_base__hasher_u32__get_quirk(
        this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_base__hasher_u32__set_quirk(
        this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  update(
      wuffs_base__slice_u8 a_x) {
    return wuffs_base__hasher_u32__update(
        this, a_x);
  }

  inline uint32_t
  update_u32(
      wuffs_base__slice_u8 a_x) {
    return wuffs_base__hasher_u32__update_u32(
        this, a_x);
  }

#endif  // __cplusplus
};  // struct wuffs_base__hasher_u32__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

// --------

extern const char wuffs_base__hasher_u64__vtable_name[];

typedef struct wuffs_base__hasher_u64__func_ptrs__struct {
  uint64_t (*checksum_u64)(
    const void* self);
  uint64_t (*get_quirk)(
    const void* self,
    uint32_t a_key);
  wuffs_base__status (*set_quirk)(
    void* self,
    uint32_t a_key,
    uint64_t a_value);
  wuffs_base__empty_struct (*update)(
    void* self,
    wuffs_base__slice_u8 a_x);
  uint64_t (*update_u64)(
    void* self,
    wuffs_base__slice_u8 a_x);
} wuffs_base__hasher_u64__func_ptrs;

typedef struct wuffs_base__hasher_u64__struct wuffs_base__hasher_u64;

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_u64__checksum_u64(
    const wuffs_base__hasher_u64* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_u64__get_quirk(
    const wuffs_base__hasher_u64* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__hasher_u64__set_quirk(
    wuffs_base__hasher_u64* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_base__hasher_u64__update(
    wuffs_base__hasher_u64* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_u64__update_u64(
    wuffs_base__hasher_u64* self,
    wuffs_base__slice_u8 a_x);

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_base__hasher_u64__struct {
  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable first_vtable;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_base__hasher_u64, wuffs_unique_ptr_deleter>;
#endif

  inline uint64_t
  checksum_u64() const {
    return wuffs_base__hasher_u64__checksum_u64(this);
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_base__hasher_u64__get_quirk(
        this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_base__hasher_u64__set_quirk(
        this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  update(
      wuffs_base__slice_u8 a_x) {
    return wuffs_base__hasher_u64__update(
        this, a_x);
  }

  inline uint64_t
  update_u64(
      wuffs_base__slice_u8 a_x) {
    return wuffs_base__hasher_u64__update_u64(
        this, a_x);
  }

#endif  // __cplusplus
};  // struct wuffs_base__hasher_u64__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

// --------

extern const char wuffs_base__hasher_bitvec256__vtable_name[];

typedef struct wuffs_base__hasher_bitvec256__func_ptrs__struct {
  wuffs_base__bitvec256 (*checksum_bitvec256)(
    const void* self);
  uint64_t (*get_quirk)(
    const void* self,
    uint32_t a_key);
  wuffs_base__status (*set_quirk)(
    void* self,
    uint32_t a_key,
    uint64_t a_value);
  wuffs_base__empty_struct (*update)(
    void* self,
    wuffs_base__slice_u8 a_x);
  wuffs_base__bitvec256 (*update_bitvec256)(
    void* self,
    wuffs_base__slice_u8 a_x);
} wuffs_base__hasher_bitvec256__func_ptrs;

typedef struct wuffs_base__hasher_bitvec256__struct wuffs_base__hasher_bitvec256;

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__bitvec256
wuffs_base__hasher_bitvec256__checksum_bitvec256(
    const wuffs_base__hasher_bitvec256* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_bitvec256__get_quirk(
    const wuffs_base__hasher_bitvec256* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__hasher_bitvec256__set_quirk(
    wuffs_base__hasher_bitvec256* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_base__hasher_bitvec256__update(
    wuffs_base__hasher_bitvec256* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__bitvec256
wuffs_base__hasher_bitvec256__update_bitvec256(
    wuffs_base__hasher_bitvec256* self,
    wuffs_base__slice_u8 a_x);

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_base__hasher_bitvec256__struct {
  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable first_vtable;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_base__hasher_bitvec256, wuffs_unique_ptr_deleter>;
#endif

  inline wuffs_base__bitvec256
  checksum_bitvec256() const {
    return wuffs_base__hasher_bitvec256__checksum_bitvec256(this);
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_base__hasher_bitvec256__get_quirk(
        this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_base__hasher_bitvec256__set_quirk(
        this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  update(
      wuffs_base__slice_u8 a_x) {
    return wuffs_base__hasher_bitvec256__update(
        this, a_x);
  }

  inline wuffs_base__bitvec256
  update_bitvec256(
      wuffs_base__slice_u8 a_x) {
    return wuffs_base__hasher_bitvec256__update_bitvec256(
        this, a_x);
  }

#endif  // __cplusplus
};  // struct wuffs_base__hasher_bitvec256__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

// --------

extern const char wuffs_base__image_decoder__vtable_name[];

typedef struct wuffs_base__image_decoder__func_ptrs__struct {
  wuffs_base__status (*decode_frame)(
    void* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);
  wuffs_base__status (*decode_frame_config)(
    void* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);
  wuffs_base__status (*decode_image_config)(
    void* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);
  wuffs_base__rect_ie_u32 (*frame_dirty_rect)(
    const void* self);
  uint64_t (*get_quirk)(
    const void* self,
    uint32_t a_key);
  uint32_t (*num_animation_loops)(
    const void* self);
  uint64_t (*num_decoded_frame_configs)(
    const void* self);
  uint64_t (*num_decoded_frames)(
    const void* self);
  wuffs_base__status (*restart_frame)(
    void* self,
    uint64_t a_index,
    uint64_t a_io_position);
  wuffs_base__status (*set_quirk)(
    void* self,
    uint32_t a_key,
    uint64_t a_value);
  wuffs_base__empty_struct (*set_report_metadata)(
    void* self,
    uint32_t a_fourcc,
    bool a_report);
  wuffs_base__status (*tell_me_more)(
    void* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);
  wuffs_base__range_ii_u64 (*workbuf_len)(
    const void* self);
} wuffs_base__image_decoder__func_ptrs;

typedef struct wuffs_base__image_decoder__struct wuffs_base__image_decoder;

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__decode_frame(
    wuffs_base__image_decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__decode_frame_config(
    wuffs_base__image_decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__decode_image_config(
    wuffs_base__image_decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_base__image_decoder__frame_dirty_rect(
    const wuffs_base__image_decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__image_decoder__get_quirk(
    const wuffs_base__image_decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_base__image_decoder__num_animation_loops(
    const wuffs_base__image_decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__image_decoder__num_decoded_frame_configs(
    const wuffs_base__image_decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__image_decoder__num_decoded_frames(
    const wuffs_base__image_decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__restart_frame(
    wuffs_base__image_decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__set_quirk(
    wuffs_base__image_decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_base__image_decoder__set_report_metadata(
    wuffs_base__image_decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__tell_me_more(
    wuffs_base__image_decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_base__image_decoder__workbuf_len(
    const wuffs_base__image_decoder* self);

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_base__image_decoder__struct {
  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable first_vtable;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_base__image_decoder, wuffs_unique_ptr_deleter>;
#endif

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_base__image_decoder__decode_frame(
        this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_base__image_decoder__decode_frame_config(
        this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_base__image_decoder__decode_image_config(
        this, a_dst, a_src);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_base__image_decoder__frame_dirty_rect(this);
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_base__image_decoder__get_quirk(
        this, a_key);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_base__image_decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_base__image_decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_base__image_decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_base__image_decoder__restart_frame(
        this, a_index, a_io_position);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_base__image_decoder__set_quirk(
        this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_base__image_decoder__set_report_metadata(
        this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_base__image_decoder__tell_me_more(
        this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_base__image_decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_base__image_decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

// --------

extern const char wuffs_base__io_transformer__vtable_name[];

typedef struct wuffs_base__io_transformer__func_ptrs__struct {
  wuffs_base__optional_u63 (*dst_history_retain_length)(
    const void* self);
  uint64_t (*get_quirk)(
    const void* self,
    uint32_t a_key);
  wuffs_base__status (*set_quirk)(
    void* self,
    uint32_t a_key,
    uint64_t a_value);
  wuffs_base__status (*transform_io)(
    void* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);
  wuffs_base__range_ii_u64 (*workbuf_len)(
    const void* self);
} wuffs_base__io_transformer__func_ptrs;

typedef struct wuffs_base__io_transformer__struct wuffs_base__io_transformer;

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_base__io_transformer__dst_history_retain_length(
    const wuffs_base__io_transformer* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__io_transformer__get_quirk(
    const wuffs_base__io_transformer* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__io_transformer__set_quirk(
    wuffs_base__io_transformer* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__io_transformer__transform_io(
    wuffs_base__io_transformer* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_base__io_transformer__workbuf_len(
    const wuffs_base__io_transformer* self);

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_base__io_transformer__struct {
  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable first_vtable;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_base__io_transformer, wuffs_unique_ptr_deleter>;
#endif

  inline wuffs_base__optional_u63
  dst_history_retain_length() const {
    return wuffs_base__io_transformer__dst_history_retain_length(this);
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_base__io_transformer__get_quirk(
        this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_base__io_transformer__set_quirk(
        this, a_key, a_value);
  }

  inline wuffs_base__status
  transform_io(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_base__io_transformer__transform_io(
        this, a_dst, a_src, a_workbuf);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_base__io_transformer__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_base__io_transformer__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

// --------

extern const char wuffs_base__token_decoder__vtable_name[];

typedef struct wuffs_base__token_decoder__func_ptrs__struct {
  wuffs_base__status (*decode_tokens)(
    void* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);
  uint64_t (*get_quirk)(
    const void* self,
    uint32_t a_key);
  wuffs_base__status (*set_quirk)(
    void* self,
    uint32_t a_key,
    uint64_t a_value);
  wuffs_base__range_ii_u64 (*workbuf_len)(
    const void* self);
} wuffs_base__token_decoder__func_ptrs;

typedef struct wuffs_base__token_decoder__struct wuffs_base__token_decoder;

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__token_decoder__decode_tokens(
    wuffs_base__token_decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__token_decoder__get_quirk(
    const wuffs_base__token_decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__token_decoder__set_quirk(
    wuffs_base__token_decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_base__token_decoder__workbuf_len(
    const wuffs_base__token_decoder* self);

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_base__token_decoder__struct {
  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable first_vtable;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_base__token_decoder, wuffs_unique_ptr_deleter>;
#endif

  inline wuffs_base__status
  decode_tokens(
      wuffs_base__token_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_base__token_decoder__decode_tokens(
        this, a_dst, a_src, a_workbuf);
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_base__token_decoder__get_quirk(
        this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_base__token_decoder__set_quirk(
        this, a_key, a_value);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_base__token_decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_base__token_decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

// ----------------

#ifdef __cplusplus
}  // extern "C"
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ADLER32) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

// ---------------- Public Consts

// ---------------- Struct Declarations

typedef struct wuffs_adler32__hasher__struct wuffs_adler32__hasher;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_adler32__hasher__initialize(
    wuffs_adler32__hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_adler32__hasher(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_adler32__hasher*
wuffs_adler32__hasher__alloc(void);

static inline wuffs_base__hasher_u32*
wuffs_adler32__hasher__alloc_as__wuffs_base__hasher_u32(void) {
  return (wuffs_base__hasher_u32*)(wuffs_adler32__hasher__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__hasher_u32*
wuffs_adler32__hasher__upcast_as__wuffs_base__hasher_u32(
    wuffs_adler32__hasher* p) {
  return (wuffs_base__hasher_u32*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_adler32__hasher__get_quirk(
    const wuffs_adler32__hasher* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_adler32__hasher__set_quirk(
    wuffs_adler32__hasher* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_adler32__hasher__update(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_adler32__hasher__update_u32(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_adler32__hasher__checksum_u32(
    const wuffs_adler32__hasher* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_adler32__hasher__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__hasher_u32;
    wuffs_base__vtable null_vtable;

    uint32_t f_state;
    bool f_started;

    wuffs_base__empty_struct (*choosy_up)(
        wuffs_adler32__hasher* self,
        wuffs_base__slice_u8 a_x);
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_adler32__hasher, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_adler32__hasher__alloc());
  }

  static inline wuffs_base__hasher_u32::unique_ptr
  alloc_as__wuffs_base__hasher_u32() {
    return wuffs_base__hasher_u32::unique_ptr(
        wuffs_adler32__hasher__alloc_as__wuffs_base__hasher_u32());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_adler32__hasher__struct() = delete;
  wuffs_adler32__hasher__struct(const wuffs_adler32__hasher__struct&) = delete;
  wuffs_adler32__hasher__struct& operator=(
      const wuffs_adler32__hasher__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_adler32__hasher__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__hasher_u32*
  upcast_as__wuffs_base__hasher_u32() {
    return (wuffs_base__hasher_u32*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_adler32__hasher__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_adler32__hasher__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  update(
      wuffs_base__slice_u8 a_x) {
    return wuffs_adler32__hasher__update(this, a_x);
  }

  inline uint32_t
  update_u32(
      wuffs_base__slice_u8 a_x) {
    return wuffs_adler32__hasher__update_u32(this, a_x);
  }

  inline uint32_t
  checksum_u32() const {
    return wuffs_adler32__hasher__checksum_u32(this);
  }

#endif  // __cplusplus
};  // struct wuffs_adler32__hasher__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ADLER32) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BMP) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_bmp__error__bad_header[];
extern const char wuffs_bmp__error__bad_rle_compression[];
extern const char wuffs_bmp__error__truncated_input[];
extern const char wuffs_bmp__error__unsupported_bmp_file[];

// ---------------- Public Consts

#define WUFFS_BMP__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_bmp__decoder__struct wuffs_bmp__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_bmp__decoder__initialize(
    wuffs_bmp__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_bmp__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_bmp__decoder*
wuffs_bmp__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_bmp__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_bmp__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_bmp__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_bmp__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_bmp__decoder__get_quirk(
    const wuffs_bmp__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__set_quirk(
    wuffs_bmp__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__decode_image_config(
    wuffs_bmp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__decode_frame_config(
    wuffs_bmp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__decode_frame(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_bmp__decoder__frame_dirty_rect(
    const wuffs_bmp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_bmp__decoder__num_animation_loops(
    const wuffs_bmp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_bmp__decoder__num_decoded_frame_configs(
    const wuffs_bmp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_bmp__decoder__num_decoded_frames(
    const wuffs_bmp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__restart_frame(
    wuffs_bmp__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_bmp__decoder__set_report_metadata(
    wuffs_bmp__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__tell_me_more(
    wuffs_bmp__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_bmp__decoder__workbuf_len(
    const wuffs_bmp__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_bmp__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_width;
    uint32_t f_height;
    uint8_t f_call_sequence;
    bool f_top_down;
    uint32_t f_pad_per_row;
    uint32_t f_src_pixfmt;
    uint32_t f_io_redirect_fourcc;
    uint64_t f_io_redirect_pos;
    uint64_t f_frame_config_io_position;
    uint32_t f_bitmap_info_len;
    uint32_t f_padding;
    uint32_t f_bits_per_pixel;
    uint32_t f_compression;
    uint32_t f_channel_masks[4];
    uint8_t f_channel_shifts[4];
    uint8_t f_channel_num_bits[4];
    uint32_t f_dst_x;
    uint32_t f_dst_y;
    uint32_t f_dst_y_inc;
    uint32_t f_pending_pad;
    uint32_t f_rle_state;
    uint32_t f_rle_length;
    uint8_t f_rle_delta_x;
    bool f_rle_padded;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
    uint32_t p_tell_me_more;
    uint32_t p_read_palette;
  } private_impl;

  struct {
    uint8_t f_scratch[2048];
    uint8_t f_src_palette[1024];

    struct {
      uint64_t scratch;
    } s_do_decode_image_config;
    struct {
      uint64_t scratch;
    } s_do_decode_frame;
    struct {
      uint32_t v_i;
      uint64_t scratch;
    } s_read_palette;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_bmp__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_bmp__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_bmp__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_bmp__decoder__struct() = delete;
  wuffs_bmp__decoder__struct(const wuffs_bmp__decoder__struct&) = delete;
  wuffs_bmp__decoder__struct& operator=(
      const wuffs_bmp__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_bmp__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_bmp__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_bmp__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_bmp__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_bmp__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_bmp__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_bmp__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_bmp__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_bmp__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_bmp__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_bmp__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_bmp__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_bmp__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_bmp__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_bmp__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BMP) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BZIP2) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_bzip2__error__bad_huffman_code_over_subscribed[];
extern const char wuffs_bzip2__error__bad_huffman_code_under_subscribed[];
extern const char wuffs_bzip2__error__bad_block_header[];
extern const char wuffs_bzip2__error__bad_block_length[];
extern const char wuffs_bzip2__error__bad_checksum[];
extern const char wuffs_bzip2__error__bad_header[];
extern const char wuffs_bzip2__error__bad_number_of_sections[];
extern const char wuffs_bzip2__error__truncated_input[];
extern const char wuffs_bzip2__error__unsupported_block_randomization[];

// ---------------- Public Consts

#define WUFFS_BZIP2__DECODER_DST_HISTORY_RETAIN_LENGTH_MAX_INCL_WORST_CASE 0u

#define WUFFS_BZIP2__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_bzip2__decoder__struct wuffs_bzip2__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_bzip2__decoder__initialize(
    wuffs_bzip2__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_bzip2__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_bzip2__decoder*
wuffs_bzip2__decoder__alloc(void);

static inline wuffs_base__io_transformer*
wuffs_bzip2__decoder__alloc_as__wuffs_base__io_transformer(void) {
  return (wuffs_base__io_transformer*)(wuffs_bzip2__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__io_transformer*
wuffs_bzip2__decoder__upcast_as__wuffs_base__io_transformer(
    wuffs_bzip2__decoder* p) {
  return (wuffs_base__io_transformer*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_bzip2__decoder__get_quirk(
    const wuffs_bzip2__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bzip2__decoder__set_quirk(
    wuffs_bzip2__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_bzip2__decoder__dst_history_retain_length(
    const wuffs_bzip2__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_bzip2__decoder__workbuf_len(
    const wuffs_bzip2__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bzip2__decoder__transform_io(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_bzip2__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__io_transformer;
    wuffs_base__vtable null_vtable;

    uint32_t f_bits;
    uint32_t f_n_bits;
    uint32_t f_max_incl_block_size;
    uint32_t f_block_size;
    bool f_decode_huffman_finished;
    uint8_t f_decode_huffman_which;
    uint32_t f_decode_huffman_ticks;
    uint32_t f_decode_huffman_section;
    uint32_t f_decode_huffman_run_shift;
    uint32_t f_flush_pointer;
    uint32_t f_flush_repeat_count;
    uint8_t f_flush_prev;
    bool f_ignore_checksum;
    uint32_t f_final_checksum_have;
    uint32_t f_block_checksum_have;
    uint32_t f_block_checksum_want;
    uint32_t f_original_pointer;
    uint32_t f_num_symbols;
    uint32_t f_num_huffman_codes;
    uint32_t f_num_sections;
    uint32_t f_code_lengths_bitmask;

    uint32_t p_transform_io;
    uint32_t p_do_transform_io;
    uint32_t p_prepare_block;
    uint32_t p_read_code_lengths;
    uint32_t p_flush_slow;
    uint32_t p_decode_huffman_slow;
  } private_impl;

  struct {
    uint32_t f_scratch;
    uint32_t f_letter_counts[256];
    uint8_t f_presence[256];
    uint8_t f_mtft[256];
    uint8_t f_huffman_selectors[32768];
    uint16_t f_huffman_trees[6][257][2];
    uint16_t f_huffman_tables[6][256];
    uint32_t f_bwt[1048576];

    struct {
      uint32_t v_i;
      uint64_t v_tag;
      uint32_t v_final_checksum_want;
    } s_do_transform_io;
    struct {
      uint32_t v_i;
      uint32_t v_selector;
    } s_prepare_block;
    struct {
      uint32_t v_i;
      uint32_t v_code_length;
    } s_read_code_lengths;
    struct {
      uint32_t v_flush_pointer;
      uint32_t v_flush_repeat_count;
      uint8_t v_flush_prev;
      uint32_t v_block_checksum_have;
      uint32_t v_block_size;
      uint8_t v_curr;
      uint64_t scratch;
    } s_flush_slow;
    struct {
      uint32_t v_node_index;
    } s_decode_huffman_slow;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_bzip2__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_bzip2__decoder__alloc());
  }

  static inline wuffs_base__io_transformer::unique_ptr
  alloc_as__wuffs_base__io_transformer() {
    return wuffs_base__io_transformer::unique_ptr(
        wuffs_bzip2__decoder__alloc_as__wuffs_base__io_transformer());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_bzip2__decoder__struct() = delete;
  wuffs_bzip2__decoder__struct(const wuffs_bzip2__decoder__struct&) = delete;
  wuffs_bzip2__decoder__struct& operator=(
      const wuffs_bzip2__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_bzip2__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__io_transformer*
  upcast_as__wuffs_base__io_transformer() {
    return (wuffs_base__io_transformer*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_bzip2__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_bzip2__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__optional_u63
  dst_history_retain_length() const {
    return wuffs_bzip2__decoder__dst_history_retain_length(this);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_bzip2__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  transform_io(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_bzip2__decoder__transform_io(this, a_dst, a_src, a_workbuf);
  }

#endif  // __cplusplus
};  // struct wuffs_bzip2__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BZIP2) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CBOR) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_cbor__error__bad_input[];
extern const char wuffs_cbor__error__unsupported_recursion_depth[];

// ---------------- Public Consts

#define WUFFS_CBOR__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

#define WUFFS_CBOR__DECODER_DEPTH_MAX_INCL 1024u

#define WUFFS_CBOR__DECODER_DST_TOKEN_BUFFER_LENGTH_MIN_INCL 2u

#define WUFFS_CBOR__DECODER_SRC_IO_BUFFER_LENGTH_MIN_INCL 9u

#define WUFFS_CBOR__TOKEN_VALUE_MAJOR 731642u

#define WUFFS_CBOR__TOKEN_VALUE_MINOR__DETAIL_MASK 262143u

#define WUFFS_CBOR__TOKEN_VALUE_MINOR__MINUS_1_MINUS_X 16777216u

#define WUFFS_CBOR__TOKEN_VALUE_MINOR__SIMPLE_VALUE 8388608u

#define WUFFS_CBOR__TOKEN_VALUE_MINOR__TAG 4194304u

// ---------------- Struct Declarations

typedef struct wuffs_cbor__decoder__struct wuffs_cbor__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_cbor__decoder__initialize(
    wuffs_cbor__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_cbor__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_cbor__decoder*
wuffs_cbor__decoder__alloc(void);

static inline wuffs_base__token_decoder*
wuffs_cbor__decoder__alloc_as__wuffs_base__token_decoder(void) {
  return (wuffs_base__token_decoder*)(wuffs_cbor__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__token_decoder*
wuffs_cbor__decoder__upcast_as__wuffs_base__token_decoder(
    wuffs_cbor__decoder* p) {
  return (wuffs_base__token_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_cbor__decoder__get_quirk(
    const wuffs_cbor__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_cbor__decoder__set_quirk(
    wuffs_cbor__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_cbor__decoder__workbuf_len(
    const wuffs_cbor__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_cbor__decoder__decode_tokens(
    wuffs_cbor__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_cbor__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__token_decoder;
    wuffs_base__vtable null_vtable;

    bool f_end_of_data;

    uint32_t p_decode_tokens;
  } private_impl;

  struct {
    uint32_t f_stack[64];
    uint64_t f_container_num_remaining[1024];

    struct {
      uint64_t v_string_length;
      uint32_t v_depth;
      bool v_tagged;
      uint8_t v_indefinite_string_major_type;
    } s_decode_tokens;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_cbor__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_cbor__decoder__alloc());
  }

  static inline wuffs_base__token_decoder::unique_ptr
  alloc_as__wuffs_base__token_decoder() {
    return wuffs_base__token_decoder::unique_ptr(
        wuffs_cbor__decoder__alloc_as__wuffs_base__token_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_cbor__decoder__struct() = delete;
  wuffs_cbor__decoder__struct(const wuffs_cbor__decoder__struct&) = delete;
  wuffs_cbor__decoder__struct& operator=(
      const wuffs_cbor__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_cbor__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__token_decoder*
  upcast_as__wuffs_base__token_decoder() {
    return (wuffs_base__token_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_cbor__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_cbor__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_cbor__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  decode_tokens(
      wuffs_base__token_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_cbor__decoder__decode_tokens(this, a_dst, a_src, a_workbuf);
  }

#endif  // __cplusplus
};  // struct wuffs_cbor__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CBOR) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CRC32) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

// ---------------- Public Consts

// ---------------- Struct Declarations

typedef struct wuffs_crc32__ieee_hasher__struct wuffs_crc32__ieee_hasher;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_crc32__ieee_hasher__initialize(
    wuffs_crc32__ieee_hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_crc32__ieee_hasher(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_crc32__ieee_hasher*
wuffs_crc32__ieee_hasher__alloc(void);

static inline wuffs_base__hasher_u32*
wuffs_crc32__ieee_hasher__alloc_as__wuffs_base__hasher_u32(void) {
  return (wuffs_base__hasher_u32*)(wuffs_crc32__ieee_hasher__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__hasher_u32*
wuffs_crc32__ieee_hasher__upcast_as__wuffs_base__hasher_u32(
    wuffs_crc32__ieee_hasher* p) {
  return (wuffs_base__hasher_u32*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_crc32__ieee_hasher__get_quirk(
    const wuffs_crc32__ieee_hasher* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_crc32__ieee_hasher__set_quirk(
    wuffs_crc32__ieee_hasher* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__update(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_crc32__ieee_hasher__update_u32(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_crc32__ieee_hasher__checksum_u32(
    const wuffs_crc32__ieee_hasher* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_crc32__ieee_hasher__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__hasher_u32;
    wuffs_base__vtable null_vtable;

    uint32_t f_state;

    wuffs_base__empty_struct (*choosy_up)(
        wuffs_crc32__ieee_hasher* self,
        wuffs_base__slice_u8 a_x);
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_crc32__ieee_hasher, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_crc32__ieee_hasher__alloc());
  }

  static inline wuffs_base__hasher_u32::unique_ptr
  alloc_as__wuffs_base__hasher_u32() {
    return wuffs_base__hasher_u32::unique_ptr(
        wuffs_crc32__ieee_hasher__alloc_as__wuffs_base__hasher_u32());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_crc32__ieee_hasher__struct() = delete;
  wuffs_crc32__ieee_hasher__struct(const wuffs_crc32__ieee_hasher__struct&) = delete;
  wuffs_crc32__ieee_hasher__struct& operator=(
      const wuffs_crc32__ieee_hasher__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_crc32__ieee_hasher__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__hasher_u32*
  upcast_as__wuffs_base__hasher_u32() {
    return (wuffs_base__hasher_u32*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_crc32__ieee_hasher__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_crc32__ieee_hasher__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  update(
      wuffs_base__slice_u8 a_x) {
    return wuffs_crc32__ieee_hasher__update(this, a_x);
  }

  inline uint32_t
  update_u32(
      wuffs_base__slice_u8 a_x) {
    return wuffs_crc32__ieee_hasher__update_u32(this, a_x);
  }

  inline uint32_t
  checksum_u32() const {
    return wuffs_crc32__ieee_hasher__checksum_u32(this);
  }

#endif  // __cplusplus
};  // struct wuffs_crc32__ieee_hasher__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CRC32) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CRC64) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

// ---------------- Public Consts

// ---------------- Struct Declarations

typedef struct wuffs_crc64__ecma_hasher__struct wuffs_crc64__ecma_hasher;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_crc64__ecma_hasher__initialize(
    wuffs_crc64__ecma_hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_crc64__ecma_hasher(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_crc64__ecma_hasher*
wuffs_crc64__ecma_hasher__alloc(void);

static inline wuffs_base__hasher_u64*
wuffs_crc64__ecma_hasher__alloc_as__wuffs_base__hasher_u64(void) {
  return (wuffs_base__hasher_u64*)(wuffs_crc64__ecma_hasher__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__hasher_u64*
wuffs_crc64__ecma_hasher__upcast_as__wuffs_base__hasher_u64(
    wuffs_crc64__ecma_hasher* p) {
  return (wuffs_base__hasher_u64*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_crc64__ecma_hasher__get_quirk(
    const wuffs_crc64__ecma_hasher* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_crc64__ecma_hasher__set_quirk(
    wuffs_crc64__ecma_hasher* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_crc64__ecma_hasher__update(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_crc64__ecma_hasher__update_u64(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_crc64__ecma_hasher__checksum_u64(
    const wuffs_crc64__ecma_hasher* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_crc64__ecma_hasher__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__hasher_u64;
    wuffs_base__vtable null_vtable;

    uint64_t f_state;

    wuffs_base__empty_struct (*choosy_up)(
        wuffs_crc64__ecma_hasher* self,
        wuffs_base__slice_u8 a_x);
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_crc64__ecma_hasher, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_crc64__ecma_hasher__alloc());
  }

  static inline wuffs_base__hasher_u64::unique_ptr
  alloc_as__wuffs_base__hasher_u64() {
    return wuffs_base__hasher_u64::unique_ptr(
        wuffs_crc64__ecma_hasher__alloc_as__wuffs_base__hasher_u64());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_crc64__ecma_hasher__struct() = delete;
  wuffs_crc64__ecma_hasher__struct(const wuffs_crc64__ecma_hasher__struct&) = delete;
  wuffs_crc64__ecma_hasher__struct& operator=(
      const wuffs_crc64__ecma_hasher__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_crc64__ecma_hasher__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__hasher_u64*
  upcast_as__wuffs_base__hasher_u64() {
    return (wuffs_base__hasher_u64*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_crc64__ecma_hasher__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_crc64__ecma_hasher__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  update(
      wuffs_base__slice_u8 a_x) {
    return wuffs_crc64__ecma_hasher__update(this, a_x);
  }

  inline uint64_t
  update_u64(
      wuffs_base__slice_u8 a_x) {
    return wuffs_crc64__ecma_hasher__update_u64(this, a_x);
  }

  inline uint64_t
  checksum_u64() const {
    return wuffs_crc64__ecma_hasher__checksum_u64(this);
  }

#endif  // __cplusplus
};  // struct wuffs_crc64__ecma_hasher__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CRC64) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__DEFLATE) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_deflate__error__bad_huffman_code_over_subscribed[];
extern const char wuffs_deflate__error__bad_huffman_code_under_subscribed[];
extern const char wuffs_deflate__error__bad_huffman_code_length_count[];
extern const char wuffs_deflate__error__bad_huffman_code_length_repetition[];
extern const char wuffs_deflate__error__bad_huffman_code[];
extern const char wuffs_deflate__error__bad_huffman_minimum_code_length[];
extern const char wuffs_deflate__error__bad_block[];
extern const char wuffs_deflate__error__bad_distance[];
extern const char wuffs_deflate__error__bad_distance_code_count[];
extern const char wuffs_deflate__error__bad_literal_length_code_count[];
extern const char wuffs_deflate__error__inconsistent_stored_block_length[];
extern const char wuffs_deflate__error__missing_end_of_block_code[];
extern const char wuffs_deflate__error__no_huffman_codes[];
extern const char wuffs_deflate__error__truncated_input[];

// ---------------- Public Consts

#define WUFFS_DEFLATE__DECODER_DST_HISTORY_RETAIN_LENGTH_MAX_INCL_WORST_CASE 0u

#define WUFFS_DEFLATE__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1u

// ---------------- Struct Declarations

typedef struct wuffs_deflate__decoder__struct wuffs_deflate__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_deflate__decoder__initialize(
    wuffs_deflate__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_deflate__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_deflate__decoder*
wuffs_deflate__decoder__alloc(void);

static inline wuffs_base__io_transformer*
wuffs_deflate__decoder__alloc_as__wuffs_base__io_transformer(void) {
  return (wuffs_base__io_transformer*)(wuffs_deflate__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__io_transformer*
wuffs_deflate__decoder__upcast_as__wuffs_base__io_transformer(
    wuffs_deflate__decoder* p) {
  return (wuffs_base__io_transformer*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_deflate__decoder__add_history(
    wuffs_deflate__decoder* self,
    wuffs_base__slice_u8 a_hist);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_deflate__decoder__get_quirk(
    const wuffs_deflate__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_deflate__decoder__set_quirk(
    wuffs_deflate__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_deflate__decoder__dst_history_retain_length(
    const wuffs_deflate__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_deflate__decoder__workbuf_len(
    const wuffs_deflate__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_deflate__decoder__transform_io(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_deflate__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__io_transformer;
    wuffs_base__vtable null_vtable;

    uint32_t f_bits;
    uint32_t f_n_bits;
    uint64_t f_transformed_history_count;
    uint32_t f_history_index;
    uint32_t f_n_huffs_bits[2];
    bool f_end_of_block;

    uint32_t p_transform_io;
    uint32_t p_do_transform_io;
    uint32_t p_decode_blocks;
    uint32_t p_decode_uncompressed;
    uint32_t p_init_dynamic_huffman;
    wuffs_base__status (*choosy_decode_huffman_fast64)(
        wuffs_deflate__decoder* self,
        wuffs_base__io_buffer* a_dst,
        wuffs_base__io_buffer* a_src);
    uint32_t p_decode_huffman_slow;
  } private_impl;

  struct {
    uint32_t f_huffs[2][1024];
    uint8_t f_history[33025];
    uint8_t f_code_lengths[320];

    struct {
      uint32_t v_final;
    } s_decode_blocks;
    struct {
      uint32_t v_length;
      uint64_t scratch;
    } s_decode_uncompressed;
    struct {
      uint32_t v_bits;
      uint32_t v_n_bits;
      uint32_t v_n_lit;
      uint32_t v_n_dist;
      uint32_t v_n_clen;
      uint32_t v_i;
      uint32_t v_mask;
      uint32_t v_n_extra_bits;
      uint8_t v_rep_symbol;
      uint32_t v_rep_count;
    } s_init_dynamic_huffman;
    struct {
      uint32_t v_bits;
      uint32_t v_n_bits;
      uint32_t v_table_entry_n_bits;
      uint32_t v_lmask;
      uint32_t v_dmask;
      uint32_t v_redir_top;
      uint32_t v_redir_mask;
      uint32_t v_length;
      uint32_t v_dist_minus_1;
      uint64_t scratch;
    } s_decode_huffman_slow;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_deflate__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_deflate__decoder__alloc());
  }

  static inline wuffs_base__io_transformer::unique_ptr
  alloc_as__wuffs_base__io_transformer() {
    return wuffs_base__io_transformer::unique_ptr(
        wuffs_deflate__decoder__alloc_as__wuffs_base__io_transformer());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_deflate__decoder__struct() = delete;
  wuffs_deflate__decoder__struct(const wuffs_deflate__decoder__struct&) = delete;
  wuffs_deflate__decoder__struct& operator=(
      const wuffs_deflate__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_deflate__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__io_transformer*
  upcast_as__wuffs_base__io_transformer() {
    return (wuffs_base__io_transformer*)this;
  }

  inline wuffs_base__empty_struct
  add_history(
      wuffs_base__slice_u8 a_hist) {
    return wuffs_deflate__decoder__add_history(this, a_hist);
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_deflate__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_deflate__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__optional_u63
  dst_history_retain_length() const {
    return wuffs_deflate__decoder__dst_history_retain_length(this);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_deflate__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  transform_io(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_deflate__decoder__transform_io(this, a_dst, a_src, a_workbuf);
  }

#endif  // __cplusplus
};  // struct wuffs_deflate__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__DEFLATE) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ETC2) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_etc2__error__bad_header[];
extern const char wuffs_etc2__error__truncated_input[];
extern const char wuffs_etc2__error__unsupported_etc2_file[];

// ---------------- Public Consts

#define WUFFS_ETC2__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_etc2__decoder__struct wuffs_etc2__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_etc2__decoder__initialize(
    wuffs_etc2__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_etc2__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_etc2__decoder*
wuffs_etc2__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_etc2__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_etc2__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_etc2__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_etc2__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_etc2__decoder__get_quirk(
    const wuffs_etc2__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__set_quirk(
    wuffs_etc2__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__decode_image_config(
    wuffs_etc2__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__decode_frame_config(
    wuffs_etc2__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__decode_frame(
    wuffs_etc2__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_etc2__decoder__frame_dirty_rect(
    const wuffs_etc2__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_etc2__decoder__num_animation_loops(
    const wuffs_etc2__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_etc2__decoder__num_decoded_frame_configs(
    const wuffs_etc2__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_etc2__decoder__num_decoded_frames(
    const wuffs_etc2__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__restart_frame(
    wuffs_etc2__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_etc2__decoder__set_report_metadata(
    wuffs_etc2__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__tell_me_more(
    wuffs_etc2__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_etc2__decoder__workbuf_len(
    const wuffs_etc2__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_etc2__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_pixfmt;
    uint32_t f_width;
    uint32_t f_height;
    uint8_t f_call_sequence;
    bool f_srgb;
    uint32_t f_num_buffered_blocks;
    uint32_t f_dst_x;
    uint32_t f_dst_y;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
    uint32_t p_from_src_to_colors;
  } private_impl;

  struct {
    uint64_t f_alphas[64];
    uint64_t f_colors[64];
    uint8_t f_buffer[4096];

    struct {
      uint16_t v_rounded_up_width;
      uint16_t v_rounded_up_height;
      uint64_t scratch;
    } s_do_decode_image_config;
    struct {
      uint32_t v_remaining;
    } s_do_decode_frame;
    struct {
      uint32_t v_bi;
      uint64_t scratch;
    } s_from_src_to_colors;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_etc2__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_etc2__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_etc2__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_etc2__decoder__struct() = delete;
  wuffs_etc2__decoder__struct(const wuffs_etc2__decoder__struct&) = delete;
  wuffs_etc2__decoder__struct& operator=(
      const wuffs_etc2__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_etc2__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_etc2__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_etc2__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_etc2__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_etc2__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_etc2__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_etc2__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_etc2__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_etc2__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_etc2__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_etc2__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_etc2__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_etc2__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_etc2__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_etc2__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ETC2) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GIF) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_gif__error__bad_lzw_code[];
extern const char wuffs_gif__error__bad_extension_label[];
extern const char wuffs_gif__error__bad_frame_size[];
extern const char wuffs_gif__error__bad_graphic_control[];
extern const char wuffs_gif__error__bad_header[];
extern const char wuffs_gif__error__bad_literal_width[];
extern const char wuffs_gif__error__bad_palette[];
extern const char wuffs_gif__error__truncated_input[];

// ---------------- Public Consts

#define WUFFS_GIF__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

#define WUFFS_GIF__QUIRK_DELAY_NUM_DECODED_FRAMES 983928832u

#define WUFFS_GIF__QUIRK_FIRST_FRAME_LOCAL_PALETTE_MEANS_BLACK_BACKGROUND 983928833u

#define WUFFS_GIF__QUIRK_HONOR_BACKGROUND_COLOR 983928834u

#define WUFFS_GIF__QUIRK_IGNORE_TOO_MUCH_PIXEL_DATA 983928835u

#define WUFFS_GIF__QUIRK_IMAGE_BOUNDS_ARE_STRICT 983928836u

#define WUFFS_GIF__QUIRK_REJECT_EMPTY_FRAME 983928837u

#define WUFFS_GIF__QUIRK_REJECT_EMPTY_PALETTE 983928838u

// ---------------- Struct Declarations

typedef struct wuffs_gif__decoder__struct wuffs_gif__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_gif__decoder__initialize(
    wuffs_gif__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_gif__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_gif__decoder*
wuffs_gif__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_gif__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_gif__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_gif__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_gif__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_gif__decoder__get_quirk(
    const wuffs_gif__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__set_quirk(
    wuffs_gif__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__decode_image_config(
    wuffs_gif__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_gif__decoder__set_report_metadata(
    wuffs_gif__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__tell_me_more(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_gif__decoder__num_animation_loops(
    const wuffs_gif__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_gif__decoder__num_decoded_frame_configs(
    const wuffs_gif__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_gif__decoder__num_decoded_frames(
    const wuffs_gif__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_gif__decoder__frame_dirty_rect(
    const wuffs_gif__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_gif__decoder__workbuf_len(
    const wuffs_gif__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__restart_frame(
    wuffs_gif__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__decode_frame_config(
    wuffs_gif__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__decode_frame(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_gif__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_width;
    uint32_t f_height;
    uint8_t f_call_sequence;
    bool f_report_metadata_iccp;
    bool f_report_metadata_xmp;
    uint32_t f_metadata_fourcc;
    uint64_t f_metadata_io_position;
    bool f_quirks[7];
    bool f_delayed_num_decoded_frames;
    bool f_seen_header;
    bool f_ignored_but_affects_benchmarks;
    bool f_has_global_palette;
    uint8_t f_interlace;
    bool f_seen_num_animation_loops_value;
    uint32_t f_num_animation_loops_value;
    uint32_t f_background_color_u32_argb_premul;
    uint32_t f_black_color_u32_argb_premul;
    bool f_gc_has_transparent_index;
    uint8_t f_gc_transparent_index;
    uint8_t f_gc_disposal;
    uint64_t f_gc_duration;
    uint64_t f_frame_config_io_position;
    uint64_t f_num_decoded_frame_configs_value;
    uint64_t f_num_decoded_frames_value;
    uint32_t f_frame_rect_x0;
    uint32_t f_frame_rect_y0;
    uint32_t f_frame_rect_x1;
    uint32_t f_frame_rect_y1;
    uint32_t f_dst_x;
    uint32_t f_dst_y;
    uint32_t f_dirty_max_excl_y;
    uint64_t f_compressed_ri;
    uint64_t f_compressed_wi;
    wuffs_base__pixel_swizzler f_swizzler;
    uint32_t f_lzw_pending_literal_width_plus_one;
    uint32_t f_lzw_literal_width;
    uint32_t f_lzw_clear_code;
    uint32_t f_lzw_end_code;
    uint32_t f_lzw_save_code;
    uint32_t f_lzw_prev_code;
    uint32_t f_lzw_width;
    uint32_t f_lzw_bits;
    uint32_t f_lzw_n_bits;
    uint32_t f_lzw_output_ri;
    uint32_t f_lzw_output_wi;
    uint32_t f_lzw_read_from_return_value;
    uint16_t f_lzw_prefixes[4096];

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_tell_me_more;
    uint32_t p_do_tell_me_more;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_skip_frame;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
    uint32_t p_decode_up_to_id_part1;
    uint32_t p_decode_header;
    uint32_t p_decode_lsd;
    uint32_t p_decode_extension;
    uint32_t p_skip_blocks;
    uint32_t p_decode_ae;
    uint32_t p_decode_gc;
    uint32_t p_decode_id_part0;
    uint32_t p_decode_id_part1;
    uint32_t p_decode_id_part2;
  } private_impl;

  struct {
    uint8_t f_compressed[4096];
    uint8_t f_palettes[2][1024];
    uint8_t f_dst_palette[1024];
    uint8_t f_lzw_suffixes[4096][8];
    uint16_t f_lzw_lm1s[4096];
    uint8_t f_lzw_output[8199];

    struct {
      uint32_t v_background_color;
    } s_do_decode_frame_config;
    struct {
      uint64_t scratch;
    } s_skip_frame;
    struct {
      uint64_t scratch;
    } s_decode_header;
    struct {
      uint8_t v_flags;
      uint8_t v_background_color_index;
      uint32_t v_num_palette_entries;
      uint32_t v_i;
      uint64_t scratch;
    } s_decode_lsd;
    struct {
      uint64_t scratch;
    } s_skip_blocks;
    struct {
      uint8_t v_block_size;
      bool v_is_animexts;
      bool v_is_netscape;
      bool v_is_iccp;
      bool v_is_xmp;
      uint64_t scratch;
    } s_decode_ae;
    struct {
      uint64_t scratch;
    } s_decode_gc;
    struct {
      uint64_t scratch;
    } s_decode_id_part0;
    struct {
      uint8_t v_which_palette;
      uint32_t v_num_palette_entries;
      uint32_t v_i;
      uint64_t scratch;
    } s_decode_id_part1;
    struct {
      uint64_t v_block_size;
      bool v_need_block_size;
      uint64_t scratch;
    } s_decode_id_part2;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_gif__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_gif__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_gif__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_gif__decoder__struct() = delete;
  wuffs_gif__decoder__struct(const wuffs_gif__decoder__struct&) = delete;
  wuffs_gif__decoder__struct& operator=(
      const wuffs_gif__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_gif__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_gif__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_gif__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_gif__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_gif__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_gif__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_gif__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_gif__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_gif__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_gif__decoder__frame_dirty_rect(this);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_gif__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_gif__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_gif__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_gif__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

#endif  // __cplusplus
};  // struct wuffs_gif__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GIF) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GZIP) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_gzip__error__bad_checksum[];
extern const char wuffs_gzip__error__bad_compression_method[];
extern const char wuffs_gzip__error__bad_encoding_flags[];
extern const char wuffs_gzip__error__bad_header[];
extern const char wuffs_gzip__error__truncated_input[];

// ---------------- Public Consts

#define WUFFS_GZIP__DECODER_DST_HISTORY_RETAIN_LENGTH_MAX_INCL_WORST_CASE 0u

#define WUFFS_GZIP__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1u

// ---------------- Struct Declarations

typedef struct wuffs_gzip__decoder__struct wuffs_gzip__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_gzip__decoder__initialize(
    wuffs_gzip__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_gzip__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_gzip__decoder*
wuffs_gzip__decoder__alloc(void);

static inline wuffs_base__io_transformer*
wuffs_gzip__decoder__alloc_as__wuffs_base__io_transformer(void) {
  return (wuffs_base__io_transformer*)(wuffs_gzip__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__io_transformer*
wuffs_gzip__decoder__upcast_as__wuffs_base__io_transformer(
    wuffs_gzip__decoder* p) {
  return (wuffs_base__io_transformer*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_gzip__decoder__get_quirk(
    const wuffs_gzip__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gzip__decoder__set_quirk(
    wuffs_gzip__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_gzip__decoder__dst_history_retain_length(
    const wuffs_gzip__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_gzip__decoder__workbuf_len(
    const wuffs_gzip__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gzip__decoder__transform_io(
    wuffs_gzip__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_gzip__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__io_transformer;
    wuffs_base__vtable null_vtable;

    bool f_ignore_checksum;

    uint32_t p_transform_io;
    uint32_t p_do_transform_io;
  } private_impl;

  struct {
    wuffs_crc32__ieee_hasher f_checksum;
    wuffs_deflate__decoder f_flate;

    struct {
      uint8_t v_flags;
      uint32_t v_checksum_have;
      uint32_t v_decoded_length_have;
      uint32_t v_checksum_want;
      uint64_t scratch;
    } s_do_transform_io;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_gzip__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_gzip__decoder__alloc());
  }

  static inline wuffs_base__io_transformer::unique_ptr
  alloc_as__wuffs_base__io_transformer() {
    return wuffs_base__io_transformer::unique_ptr(
        wuffs_gzip__decoder__alloc_as__wuffs_base__io_transformer());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_gzip__decoder__struct() = delete;
  wuffs_gzip__decoder__struct(const wuffs_gzip__decoder__struct&) = delete;
  wuffs_gzip__decoder__struct& operator=(
      const wuffs_gzip__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_gzip__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__io_transformer*
  upcast_as__wuffs_base__io_transformer() {
    return (wuffs_base__io_transformer*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_gzip__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_gzip__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__optional_u63
  dst_history_retain_length() const {
    return wuffs_gzip__decoder__dst_history_retain_length(this);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_gzip__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  transform_io(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_gzip__decoder__transform_io(this, a_dst, a_src, a_workbuf);
  }

#endif  // __cplusplus
};  // struct wuffs_gzip__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GZIP) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JPEG) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_jpeg__error__bad_dht_marker[];
extern const char wuffs_jpeg__error__bad_dqt_marker[];
extern const char wuffs_jpeg__error__bad_dri_marker[];
extern const char wuffs_jpeg__error__bad_sof_marker[];
extern const char wuffs_jpeg__error__bad_sos_marker[];
extern const char wuffs_jpeg__error__bad_header[];
extern const char wuffs_jpeg__error__bad_marker[];
extern const char wuffs_jpeg__error__bad_scan_count[];
extern const char wuffs_jpeg__error__missing_huffman_table[];
extern const char wuffs_jpeg__error__missing_quantization_table[];
extern const char wuffs_jpeg__error__rejected_progressive_jpeg[];
extern const char wuffs_jpeg__error__short_sos_bitstream[];
extern const char wuffs_jpeg__error__truncated_input[];
extern const char wuffs_jpeg__error__unsupported_arithmetic_coding[];
extern const char wuffs_jpeg__error__unsupported_color_model[];
extern const char wuffs_jpeg__error__unsupported_fractional_sampling[];
extern const char wuffs_jpeg__error__unsupported_hierarchical_coding[];
extern const char wuffs_jpeg__error__unsupported_implicit_height[];
extern const char wuffs_jpeg__error__unsupported_lossless_coding[];
extern const char wuffs_jpeg__error__unsupported_marker[];
extern const char wuffs_jpeg__error__unsupported_precision_12_bits[];
extern const char wuffs_jpeg__error__unsupported_precision_16_bits[];
extern const char wuffs_jpeg__error__unsupported_precision[];
extern const char wuffs_jpeg__error__unsupported_scan_count[];

// ---------------- Public Consts

#define WUFFS_JPEG__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 51552191232u

#define WUFFS_JPEG__QUIRK_REJECT_PROGRESSIVE_JPEGS 1162824704u

// ---------------- Struct Declarations

typedef struct wuffs_jpeg__decoder__struct wuffs_jpeg__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_jpeg__decoder__initialize(
    wuffs_jpeg__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_jpeg__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_jpeg__decoder*
wuffs_jpeg__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_jpeg__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_jpeg__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_jpeg__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_jpeg__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_jpeg__decoder__get_quirk(
    const wuffs_jpeg__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__set_quirk(
    wuffs_jpeg__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__decode_image_config(
    wuffs_jpeg__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__decode_frame_config(
    wuffs_jpeg__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__decode_frame(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_jpeg__decoder__frame_dirty_rect(
    const wuffs_jpeg__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_jpeg__decoder__num_animation_loops(
    const wuffs_jpeg__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_jpeg__decoder__num_decoded_frame_configs(
    const wuffs_jpeg__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_jpeg__decoder__num_decoded_frames(
    const wuffs_jpeg__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__restart_frame(
    wuffs_jpeg__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_jpeg__decoder__set_report_metadata(
    wuffs_jpeg__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__tell_me_more(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_jpeg__decoder__workbuf_len(
    const wuffs_jpeg__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_jpeg__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_width;
    uint32_t f_height;
    uint32_t f_width_in_mcus;
    uint32_t f_height_in_mcus;
    uint8_t f_call_sequence;
    bool f_test_only_interrupt_decode_mcu;
    bool f_is_jfif;
    uint8_t f_is_adobe;
    bool f_is_rgb_or_cmyk;
    uint8_t f_sof_marker;
    uint8_t f_next_restart_marker;
    uint8_t f_max_incl_components_h;
    uint8_t f_max_incl_components_v;
    uint32_t f_num_components;
    uint8_t f_components_c[4];
    uint8_t f_components_h[4];
    uint8_t f_components_v[4];
    uint8_t f_components_tq[4];
    uint32_t f_components_workbuf_widths[4];
    uint32_t f_components_workbuf_heights[4];
    uint64_t f_components_workbuf_offsets[9];
    uint32_t f_scan_count;
    uint32_t f_scan_num_components;
    uint8_t f_scan_comps_cselector[4];
    uint8_t f_scan_comps_td[4];
    uint8_t f_scan_comps_ta[4];
    uint8_t f_scan_ss;
    uint8_t f_scan_se;
    uint8_t f_scan_ah;
    uint8_t f_scan_al;
    uint32_t f_scan_width_in_mcus;
    uint32_t f_scan_height_in_mcus;
    uint8_t f_scan_comps_bx_offset[16];
    uint8_t f_scan_comps_by_offset[16];
    uint32_t f_mcu_num_blocks;
    uint32_t f_mcu_current_block;
    uint32_t f_mcu_zig_index;
    uint8_t f_mcu_blocks_sselector[16];
    uint64_t f_mcu_blocks_offset[10];
    uint32_t f_mcu_blocks_mx_mul[10];
    uint32_t f_mcu_blocks_my_mul[10];
    uint8_t f_mcu_blocks_dc_hselector[10];
    uint8_t f_mcu_blocks_ac_hselector[10];
    uint16_t f_mcu_previous_dc_values[4];
    uint8_t f_block_smoothing_lowest_scan_al[4][10];
    uint16_t f_block_smoothing_dc_values[5][5];
    uint32_t f_block_smoothing_mx_max_incl;
    uint32_t f_block_smoothing_my_max_incl;
    uint16_t f_restart_interval;
    uint16_t f_saved_restart_interval;
    uint16_t f_restarts_remaining;
    uint16_t f_eob_run;
    uint64_t f_frame_config_io_position;
    uint32_t f_payload_length;
    bool f_seen_dqt[4];
    bool f_saved_seen_dqt[4];
    bool f_seen_dht[8];
    uint64_t f_bitstream_bits;
    uint32_t f_bitstream_n_bits;
    uint32_t f_bitstream_ri;
    uint32_t f_bitstream_wi;
    bool f_bitstream_is_closed;
    bool f_expect_multiple_scans;
    bool f_use_lower_quality;
    bool f_reject_progressive_jpegs;
    bool f_swizzle_immediately;
    wuffs_base__status f_swizzle_immediately_status;
    uint32_t f_swizzle_immediately_b_offsets[10];
    uint32_t f_swizzle_immediately_c_offsets[5];
    uint32_t f_bitstream_padding;
    uint16_t f_quant_tables[4][64];
    uint16_t f_saved_quant_tables[4][64];
    uint8_t f_huff_tables_symbols[8][256];
    uint32_t f_huff_tables_slow[8][16];
    uint16_t f_huff_tables_fast[8][256];
    wuffs_base__pixel_swizzler f_swizzler;

    wuffs_base__empty_struct (*choosy_decode_idct)(
        wuffs_jpeg__decoder* self,
        wuffs_base__slice_u8 a_dst_buffer,
        uint64_t a_dst_stride,
        uint32_t a_q);
    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_dqt;
    uint32_t p_decode_dri;
    uint32_t p_decode_appn;
    uint32_t p_decode_sof;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
    uint32_t p_decode_dht;
    uint32_t p_decode_sos;
    uint32_t p_prepare_scan;
    wuffs_base__empty_struct (*choosy_load_mcu_blocks_for_single_component)(
        wuffs_jpeg__decoder* self,
        uint32_t a_mx,
        uint32_t a_my,
        wuffs_base__slice_u8 a_workbuf,
        uint32_t a_csel);
    uint32_t p_skip_past_the_next_restart_marker;
    uint32_t (*choosy_decode_mcu)(
        wuffs_jpeg__decoder* self,
        wuffs_base__pixel_buffer* a_dst,
        wuffs_base__slice_u8 a_workbuf,
        uint32_t a_mx,
        uint32_t a_my);
  } private_impl;

  struct {
    uint8_t f_bitstream_buffer[2048];
    uint16_t f_mcu_blocks[10][64];
    uint8_t f_swizzle_immediately_buffer[640];
    uint8_t f_swizzle_ycck_scratch_buffer_2k[2048];
    uint8_t f_dht_temp_counts[16];
    uint8_t f_dht_temp_bit_lengths[256];
    uint16_t f_dht_temp_bit_strings[256];
    uint8_t f_dst_palette[1024];

    struct {
      uint8_t v_marker;
      uint64_t scratch;
    } s_do_decode_image_config;
    struct {
      uint8_t v_q;
      uint32_t v_i;
    } s_decode_dqt;
    struct {
      uint64_t scratch;
    } s_decode_dri;
    struct {
      uint64_t scratch;
    } s_decode_appn;
    struct {
      uint32_t v_i;
      uint64_t scratch;
    } s_decode_sof;
    struct {
      uint8_t v_marker;
      uint64_t scratch;
    } s_do_decode_frame;
    struct {
      uint8_t v_tc4_th;
      uint32_t v_total_count;
      uint32_t v_i;
    } s_decode_dht;
    struct {
      uint32_t v_my;
      uint32_t v_mx;
    } s_decode_sos;
    struct {
      uint32_t v_i;
      uint64_t scratch;
    } s_prepare_scan;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_jpeg__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_jpeg__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_jpeg__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_jpeg__decoder__struct() = delete;
  wuffs_jpeg__decoder__struct(const wuffs_jpeg__decoder__struct&) = delete;
  wuffs_jpeg__decoder__struct& operator=(
      const wuffs_jpeg__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_jpeg__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_jpeg__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_jpeg__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_jpeg__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_jpeg__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_jpeg__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_jpeg__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_jpeg__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_jpeg__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_jpeg__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_jpeg__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_jpeg__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_jpeg__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_jpeg__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_jpeg__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JPEG) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JSON) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_json__error__bad_c0_control_code[];
extern const char wuffs_json__error__bad_utf_8[];
extern const char wuffs_json__error__bad_backslash_escape[];
extern const char wuffs_json__error__bad_input[];
extern const char wuffs_json__error__bad_new_line_in_a_string[];
extern const char wuffs_json__error__bad_quirk_combination[];
extern const char wuffs_json__error__unsupported_number_length[];
extern const char wuffs_json__error__unsupported_recursion_depth[];

// ---------------- Public Consts

#define WUFFS_JSON__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

#define WUFFS_JSON__DECODER_DEPTH_MAX_INCL 1024u

#define WUFFS_JSON__DECODER_DST_TOKEN_BUFFER_LENGTH_MIN_INCL 1u

#define WUFFS_JSON__DECODER_SRC_IO_BUFFER_LENGTH_MIN_INCL 100u

#define WUFFS_JSON__QUIRK_ALLOW_ASCII_CONTROL_CODES 1167656960u

#define WUFFS_JSON__QUIRK_ALLOW_BACKSLASH_A 1167656961u

#define WUFFS_JSON__QUIRK_ALLOW_BACKSLASH_CAPITAL_U 1167656962u

#define WUFFS_JSON__QUIRK_ALLOW_BACKSLASH_E 1167656963u

#define WUFFS_JSON__QUIRK_ALLOW_BACKSLASH_NEW_LINE 1167656964u

#define WUFFS_JSON__QUIRK_ALLOW_BACKSLASH_QUESTION_MARK 1167656965u

#define WUFFS_JSON__QUIRK_ALLOW_BACKSLASH_SINGLE_QUOTE 1167656966u

#define WUFFS_JSON__QUIRK_ALLOW_BACKSLASH_V 1167656967u

#define WUFFS_JSON__QUIRK_ALLOW_BACKSLASH_X_AS_CODE_POINTS 1167656969u

#define WUFFS_JSON__QUIRK_ALLOW_BACKSLASH_ZERO 1167656970u

#define WUFFS_JSON__QUIRK_ALLOW_COMMENT_BLOCK 1167656971u

#define WUFFS_JSON__QUIRK_ALLOW_COMMENT_LINE 1167656972u

#define WUFFS_JSON__QUIRK_ALLOW_EXTRA_COMMA 1167656973u

#define WUFFS_JSON__QUIRK_ALLOW_INF_NAN_NUMBERS 1167656974u

#define WUFFS_JSON__QUIRK_ALLOW_LEADING_ASCII_RECORD_SEPARATOR 1167656975u

#define WUFFS_JSON__QUIRK_ALLOW_LEADING_UNICODE_BYTE_ORDER_MARK 1167656976u

#define WUFFS_JSON__QUIRK_ALLOW_TRAILING_FILLER 1167656977u

#define WUFFS_JSON__QUIRK_EXPECT_TRAILING_NEW_LINE_OR_EOF 1167656978u

#define WUFFS_JSON__QUIRK_JSON_POINTER_ALLOW_TILDE_N_TILDE_R_TILDE_T 1167656979u

#define WUFFS_JSON__QUIRK_REPLACE_INVALID_UNICODE 1167656980u

// ---------------- Struct Declarations

typedef struct wuffs_json__decoder__struct wuffs_json__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_json__decoder__initialize(
    wuffs_json__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_json__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_json__decoder*
wuffs_json__decoder__alloc(void);

static inline wuffs_base__token_decoder*
wuffs_json__decoder__alloc_as__wuffs_base__token_decoder(void) {
  return (wuffs_base__token_decoder*)(wuffs_json__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__token_decoder*
wuffs_json__decoder__upcast_as__wuffs_base__token_decoder(
    wuffs_json__decoder* p) {
  return (wuffs_base__token_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_json__decoder__get_quirk(
    const wuffs_json__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_json__decoder__set_quirk(
    wuffs_json__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_json__decoder__workbuf_len(
    const wuffs_json__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_json__decoder__decode_tokens(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_json__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__token_decoder;
    wuffs_base__vtable null_vtable;

    bool f_quirks[21];
    bool f_allow_leading_ars;
    bool f_allow_leading_ubom;
    bool f_end_of_data;
    uint8_t f_trailer_stop;
    uint8_t f_comment_type;

    uint32_t p_decode_tokens;
    uint32_t p_decode_leading;
    uint32_t p_decode_comment;
    uint32_t p_decode_inf_nan;
    uint32_t p_decode_trailer;
  } private_impl;

  struct {
    uint32_t f_stack[32];

    struct {
      uint32_t v_depth;
      uint32_t v_expect;
      uint32_t v_expect_after_value;
    } s_decode_tokens;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_json__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_json__decoder__alloc());
  }

  static inline wuffs_base__token_decoder::unique_ptr
  alloc_as__wuffs_base__token_decoder() {
    return wuffs_base__token_decoder::unique_ptr(
        wuffs_json__decoder__alloc_as__wuffs_base__token_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_json__decoder__struct() = delete;
  wuffs_json__decoder__struct(const wuffs_json__decoder__struct&) = delete;
  wuffs_json__decoder__struct& operator=(
      const wuffs_json__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_json__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__token_decoder*
  upcast_as__wuffs_base__token_decoder() {
    return (wuffs_base__token_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_json__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_json__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_json__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  decode_tokens(
      wuffs_base__token_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_json__decoder__decode_tokens(this, a_dst, a_src, a_workbuf);
  }

#endif  // __cplusplus
};  // struct wuffs_json__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JSON) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZMA) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_lzma__error__bad_lzma2_header[];
extern const char wuffs_lzma__error__bad_bitstream_trailer[];
extern const char wuffs_lzma__error__bad_code[];
extern const char wuffs_lzma__error__bad_decoded_length[];
extern const char wuffs_lzma__error__bad_distance[];
extern const char wuffs_lzma__error__bad_header[];
extern const char wuffs_lzma__error__truncated_input[];
extern const char wuffs_lzma__error__unsupported_decoded_length[];
extern const char wuffs_lzma__error__unsupported_properties[];

// ---------------- Public Consts

#define WUFFS_LZMA__DECODER_DST_HISTORY_RETAIN_LENGTH_MAX_INCL_WORST_CASE 0u

#define WUFFS_LZMA__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 4294967568u

#define WUFFS_LZMA__QUIRK_ALLOW_NON_ZERO_INITIAL_BYTE 1290294272u

#define WUFFS_LZMA__QUIRK_FORMAT_EXTENSION 1290294273u

// ---------------- Struct Declarations

typedef struct wuffs_lzma__decoder__struct wuffs_lzma__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_lzma__decoder__initialize(
    wuffs_lzma__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_lzma__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_lzma__decoder*
wuffs_lzma__decoder__alloc(void);

static inline wuffs_base__io_transformer*
wuffs_lzma__decoder__alloc_as__wuffs_base__io_transformer(void) {
  return (wuffs_base__io_transformer*)(wuffs_lzma__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__io_transformer*
wuffs_lzma__decoder__upcast_as__wuffs_base__io_transformer(
    wuffs_lzma__decoder* p) {
  return (wuffs_base__io_transformer*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_lzma__decoder__get_quirk(
    const wuffs_lzma__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzma__decoder__set_quirk(
    wuffs_lzma__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_lzma__decoder__dst_history_retain_length(
    const wuffs_lzma__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_lzma__decoder__workbuf_len(
    const wuffs_lzma__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzma__decoder__transform_io(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_lzma__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__io_transformer;
    wuffs_base__vtable null_vtable;

    uint32_t f_lc;
    uint32_t f_lp;
    uint32_t f_pb;
    uint32_t f_format_extension;
    uint32_t f_dict_size;
    uint32_t f_dict_workbuf_index;
    uint32_t f_dict_seen;
    uint64_t f_decoded_length;
    uint64_t f_lzma2_encoded_length_have;
    uint64_t f_lzma2_encoded_length_want;
    bool f_lzma2_need_prob_reset;
    bool f_lzma2_need_properties;
    bool f_lzma2_need_dict_reset;
    bool f_prev_lzma2_chunk_was_uncompressed;
    bool f_allow_non_zero_initial_byte;
    bool f_end_of_chunk;
    uint8_t f_stashed_bytes[2];
    uint32_t f_stashed_bits;
    uint32_t f_stashed_range;
    uint32_t f_stashed_state;
    uint32_t f_stashed_rep0;
    uint32_t f_stashed_rep1;
    uint32_t f_stashed_rep2;
    uint32_t f_stashed_rep3;
    uint64_t f_stashed_pos;
    uint64_t f_stashed_pos_end;

    uint32_t p_decode_bitstream_slow;
    uint32_t p_transform_io;
    uint32_t p_do_transform_io;
    uint32_t p_decode_bitstream;
    uint32_t p_update_stashed_bytes;
    uint32_t p_decode_optional_end_of_stream;
  } private_impl;

  struct {
    uint16_t f_probs_ao00[192];
    uint16_t f_probs_ao20[12];
    uint16_t f_probs_ao40[12];
    uint16_t f_probs_ao41[192];
    uint16_t f_probs_ao60[12];
    uint16_t f_probs_ao63[12];
    uint16_t f_probs_match_len_low[16][8];
    uint16_t f_probs_match_len_mid[16][8];
    uint16_t f_probs_match_len_high[1][256];
    uint16_t f_probs_longrep_len_low[16][8];
    uint16_t f_probs_longrep_len_mid[16][8];
    uint16_t f_probs_longrep_len_high[1][256];
    uint16_t f_probs_slot[4][64];
    uint16_t f_probs_small_dist[128];
    uint16_t f_probs_large_dist[16];
    uint16_t f_probs_lit[16][768];

    struct {
      uint32_t v_bits;
      uint32_t v_range;
      uint32_t v_state;
      uint32_t v_rep0;
      uint32_t v_rep1;
      uint32_t v_rep2;
      uint32_t v_rep3;
      uint32_t v_rep;
      uint64_t v_pos;
      uint64_t v_pos_end;
      uint32_t v_lc;
      uint64_t v_lp_mask;
      uint64_t v_pb_mask;
      uint32_t v_tree_node;
      uint8_t v_prev_byte;
      uint32_t v_match_byte;
      uint32_t v_len_state;
      uint32_t v_slot;
      uint32_t v_len;
      uint32_t v_lanl_offset;
      uint32_t v_num_extra_bits;
      uint32_t v_dist_extra_bits;
      uint32_t v_i;
      uint32_t v_index_lit;
      uint32_t v_index_len;
      uint32_t v_index_small_dist_base;
      uint32_t v_index_small_dist_extra;
      uint32_t v_index_large_dist;
      uint32_t v_dist;
      uint64_t scratch;
    } s_decode_bitstream_slow;
    struct {
      uint8_t v_header_byte;
      uint32_t v_length;
      uint64_t scratch;
    } s_do_transform_io;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_lzma__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_lzma__decoder__alloc());
  }

  static inline wuffs_base__io_transformer::unique_ptr
  alloc_as__wuffs_base__io_transformer() {
    return wuffs_base__io_transformer::unique_ptr(
        wuffs_lzma__decoder__alloc_as__wuffs_base__io_transformer());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_lzma__decoder__struct() = delete;
  wuffs_lzma__decoder__struct(const wuffs_lzma__decoder__struct&) = delete;
  wuffs_lzma__decoder__struct& operator=(
      const wuffs_lzma__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_lzma__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__io_transformer*
  upcast_as__wuffs_base__io_transformer() {
    return (wuffs_base__io_transformer*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_lzma__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_lzma__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__optional_u63
  dst_history_retain_length() const {
    return wuffs_lzma__decoder__dst_history_retain_length(this);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_lzma__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  transform_io(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_lzma__decoder__transform_io(this, a_dst, a_src, a_workbuf);
  }

#endif  // __cplusplus
};  // struct wuffs_lzma__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZMA) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZIP) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_lzip__error__bad_checksum[];
extern const char wuffs_lzip__error__bad_footer[];
extern const char wuffs_lzip__error__bad_header[];
extern const char wuffs_lzip__error__truncated_input[];

// ---------------- Public Consts

#define WUFFS_LZIP__DECODER_DST_HISTORY_RETAIN_LENGTH_MAX_INCL_WORST_CASE 0u

#define WUFFS_LZIP__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 4294967568u

// ---------------- Struct Declarations

typedef struct wuffs_lzip__decoder__struct wuffs_lzip__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_lzip__decoder__initialize(
    wuffs_lzip__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_lzip__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_lzip__decoder*
wuffs_lzip__decoder__alloc(void);

static inline wuffs_base__io_transformer*
wuffs_lzip__decoder__alloc_as__wuffs_base__io_transformer(void) {
  return (wuffs_base__io_transformer*)(wuffs_lzip__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__io_transformer*
wuffs_lzip__decoder__upcast_as__wuffs_base__io_transformer(
    wuffs_lzip__decoder* p) {
  return (wuffs_base__io_transformer*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_lzip__decoder__get_quirk(
    const wuffs_lzip__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzip__decoder__set_quirk(
    wuffs_lzip__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_lzip__decoder__dst_history_retain_length(
    const wuffs_lzip__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_lzip__decoder__workbuf_len(
    const wuffs_lzip__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzip__decoder__transform_io(
    wuffs_lzip__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_lzip__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__io_transformer;
    wuffs_base__vtable null_vtable;

    bool f_ignore_checksum;
    uint64_t f_dsize_have;
    uint64_t f_ssize_have;

    uint32_t p_transform_io;
    uint32_t p_do_transform_io;
  } private_impl;

  struct {
    wuffs_crc32__ieee_hasher f_crc32;
    wuffs_lzma__decoder f_lzma;

    struct {
      uint64_t scratch;
    } s_do_transform_io;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_lzip__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_lzip__decoder__alloc());
  }

  static inline wuffs_base__io_transformer::unique_ptr
  alloc_as__wuffs_base__io_transformer() {
    return wuffs_base__io_transformer::unique_ptr(
        wuffs_lzip__decoder__alloc_as__wuffs_base__io_transformer());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_lzip__decoder__struct() = delete;
  wuffs_lzip__decoder__struct(const wuffs_lzip__decoder__struct&) = delete;
  wuffs_lzip__decoder__struct& operator=(
      const wuffs_lzip__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_lzip__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__io_transformer*
  upcast_as__wuffs_base__io_transformer() {
    return (wuffs_base__io_transformer*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_lzip__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_lzip__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__optional_u63
  dst_history_retain_length() const {
    return wuffs_lzip__decoder__dst_history_retain_length(this);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_lzip__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  transform_io(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_lzip__decoder__transform_io(this, a_dst, a_src, a_workbuf);
  }

#endif  // __cplusplus
};  // struct wuffs_lzip__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZIP) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZW) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_lzw__error__bad_code[];
extern const char wuffs_lzw__error__truncated_input[];

// ---------------- Public Consts

#define WUFFS_LZW__DECODER_DST_HISTORY_RETAIN_LENGTH_MAX_INCL_WORST_CASE 0u

#define WUFFS_LZW__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

#define WUFFS_LZW__QUIRK_LITERAL_WIDTH_PLUS_ONE 1290672128u

// ---------------- Struct Declarations

typedef struct wuffs_lzw__decoder__struct wuffs_lzw__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_lzw__decoder__initialize(
    wuffs_lzw__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_lzw__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_lzw__decoder*
wuffs_lzw__decoder__alloc(void);

static inline wuffs_base__io_transformer*
wuffs_lzw__decoder__alloc_as__wuffs_base__io_transformer(void) {
  return (wuffs_base__io_transformer*)(wuffs_lzw__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__io_transformer*
wuffs_lzw__decoder__upcast_as__wuffs_base__io_transformer(
    wuffs_lzw__decoder* p) {
  return (wuffs_base__io_transformer*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_lzw__decoder__get_quirk(
    const wuffs_lzw__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzw__decoder__set_quirk(
    wuffs_lzw__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_lzw__decoder__dst_history_retain_length(
    const wuffs_lzw__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_lzw__decoder__workbuf_len(
    const wuffs_lzw__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzw__decoder__transform_io(
    wuffs_lzw__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__slice_u8
wuffs_lzw__decoder__flush(
    wuffs_lzw__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_lzw__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__io_transformer;
    wuffs_base__vtable null_vtable;

    uint32_t f_pending_literal_width_plus_one;
    uint32_t f_literal_width;
    uint32_t f_clear_code;
    uint32_t f_end_code;
    uint32_t f_save_code;
    uint32_t f_prev_code;
    uint32_t f_width;
    uint32_t f_bits;
    uint32_t f_n_bits;
    uint32_t f_output_ri;
    uint32_t f_output_wi;
    uint32_t f_read_from_return_value;
    uint16_t f_prefixes[4096];

    uint32_t p_transform_io;
    uint32_t p_write_to;
  } private_impl;

  struct {
    uint8_t f_suffixes[4096][8];
    uint16_t f_lm1s[4096];
    uint8_t f_output[8199];
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_lzw__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_lzw__decoder__alloc());
  }

  static inline wuffs_base__io_transformer::unique_ptr
  alloc_as__wuffs_base__io_transformer() {
    return wuffs_base__io_transformer::unique_ptr(
        wuffs_lzw__decoder__alloc_as__wuffs_base__io_transformer());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_lzw__decoder__struct() = delete;
  wuffs_lzw__decoder__struct(const wuffs_lzw__decoder__struct&) = delete;
  wuffs_lzw__decoder__struct& operator=(
      const wuffs_lzw__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_lzw__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__io_transformer*
  upcast_as__wuffs_base__io_transformer() {
    return (wuffs_base__io_transformer*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_lzw__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_lzw__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__optional_u63
  dst_history_retain_length() const {
    return wuffs_lzw__decoder__dst_history_retain_length(this);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_lzw__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  transform_io(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_lzw__decoder__transform_io(this, a_dst, a_src, a_workbuf);
  }

  inline wuffs_base__slice_u8
  flush() {
    return wuffs_lzw__decoder__flush(this);
  }

#endif  // __cplusplus
};  // struct wuffs_lzw__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZW) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NETPBM) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_netpbm__error__bad_header[];
extern const char wuffs_netpbm__error__truncated_input[];
extern const char wuffs_netpbm__error__unsupported_netpbm_file[];

// ---------------- Public Consts

#define WUFFS_NETPBM__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_netpbm__decoder__struct wuffs_netpbm__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_netpbm__decoder__initialize(
    wuffs_netpbm__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_netpbm__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_netpbm__decoder*
wuffs_netpbm__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_netpbm__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_netpbm__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_netpbm__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_netpbm__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_netpbm__decoder__get_quirk(
    const wuffs_netpbm__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__set_quirk(
    wuffs_netpbm__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__decode_image_config(
    wuffs_netpbm__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__decode_frame_config(
    wuffs_netpbm__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__decode_frame(
    wuffs_netpbm__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_netpbm__decoder__frame_dirty_rect(
    const wuffs_netpbm__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_netpbm__decoder__num_animation_loops(
    const wuffs_netpbm__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_netpbm__decoder__num_decoded_frame_configs(
    const wuffs_netpbm__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_netpbm__decoder__num_decoded_frames(
    const wuffs_netpbm__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__restart_frame(
    wuffs_netpbm__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_netpbm__decoder__set_report_metadata(
    wuffs_netpbm__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__tell_me_more(
    wuffs_netpbm__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_netpbm__decoder__workbuf_len(
    const wuffs_netpbm__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_netpbm__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_pixfmt;
    uint32_t f_width;
    uint32_t f_height;
    uint32_t f_max_value;
    uint8_t f_call_sequence;
    uint64_t f_frame_config_io_position;
    uint32_t f_dst_x;
    uint32_t f_dst_y;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_netpbm__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_netpbm__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_netpbm__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_netpbm__decoder__struct() = delete;
  wuffs_netpbm__decoder__struct(const wuffs_netpbm__decoder__struct&) = delete;
  wuffs_netpbm__decoder__struct& operator=(
      const wuffs_netpbm__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_netpbm__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_netpbm__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_netpbm__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_netpbm__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_netpbm__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_netpbm__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_netpbm__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_netpbm__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_netpbm__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_netpbm__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_netpbm__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_netpbm__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_netpbm__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_netpbm__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_netpbm__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NETPBM) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NIE) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_nie__error__bad_header[];
extern const char wuffs_nie__error__truncated_input[];
extern const char wuffs_nie__error__unsupported_nie_file[];

// ---------------- Public Consts

#define WUFFS_NIE__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_nie__decoder__struct wuffs_nie__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_nie__decoder__initialize(
    wuffs_nie__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_nie__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_nie__decoder*
wuffs_nie__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_nie__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_nie__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_nie__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_nie__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_nie__decoder__get_quirk(
    const wuffs_nie__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__set_quirk(
    wuffs_nie__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__decode_image_config(
    wuffs_nie__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__decode_frame_config(
    wuffs_nie__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__decode_frame(
    wuffs_nie__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_nie__decoder__frame_dirty_rect(
    const wuffs_nie__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_nie__decoder__num_animation_loops(
    const wuffs_nie__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_nie__decoder__num_decoded_frame_configs(
    const wuffs_nie__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_nie__decoder__num_decoded_frames(
    const wuffs_nie__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__restart_frame(
    wuffs_nie__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_nie__decoder__set_report_metadata(
    wuffs_nie__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__tell_me_more(
    wuffs_nie__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_nie__decoder__workbuf_len(
    const wuffs_nie__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_nie__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_pixfmt;
    uint32_t f_width;
    uint32_t f_height;
    uint8_t f_call_sequence;
    uint32_t f_dst_x;
    uint32_t f_dst_y;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
  } private_impl;

  struct {
    struct {
      uint64_t scratch;
    } s_do_decode_image_config;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_nie__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_nie__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_nie__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_nie__decoder__struct() = delete;
  wuffs_nie__decoder__struct(const wuffs_nie__decoder__struct&) = delete;
  wuffs_nie__decoder__struct& operator=(
      const wuffs_nie__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_nie__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_nie__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_nie__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_nie__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_nie__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_nie__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_nie__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_nie__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_nie__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_nie__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_nie__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_nie__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_nie__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_nie__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_nie__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NIE) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ZLIB) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_zlib__note__dictionary_required[];
extern const char wuffs_zlib__error__bad_checksum[];
extern const char wuffs_zlib__error__bad_compression_method[];
extern const char wuffs_zlib__error__bad_compression_window_size[];
extern const char wuffs_zlib__error__bad_parity_check[];
extern const char wuffs_zlib__error__incorrect_dictionary[];
extern const char wuffs_zlib__error__truncated_input[];

// ---------------- Public Consts

#define WUFFS_ZLIB__QUIRK_JUST_RAW_DEFLATE 2056083456u

#define WUFFS_ZLIB__DECODER_DST_HISTORY_RETAIN_LENGTH_MAX_INCL_WORST_CASE 0u

#define WUFFS_ZLIB__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1u

// ---------------- Struct Declarations

typedef struct wuffs_zlib__decoder__struct wuffs_zlib__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_zlib__decoder__initialize(
    wuffs_zlib__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_zlib__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_zlib__decoder*
wuffs_zlib__decoder__alloc(void);

static inline wuffs_base__io_transformer*
wuffs_zlib__decoder__alloc_as__wuffs_base__io_transformer(void) {
  return (wuffs_base__io_transformer*)(wuffs_zlib__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__io_transformer*
wuffs_zlib__decoder__upcast_as__wuffs_base__io_transformer(
    wuffs_zlib__decoder* p) {
  return (wuffs_base__io_transformer*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_zlib__decoder__dictionary_id(
    const wuffs_zlib__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_zlib__decoder__add_dictionary(
    wuffs_zlib__decoder* self,
    wuffs_base__slice_u8 a_dict);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_zlib__decoder__get_quirk(
    const wuffs_zlib__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_zlib__decoder__set_quirk(
    wuffs_zlib__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_zlib__decoder__dst_history_retain_length(
    const wuffs_zlib__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_zlib__decoder__workbuf_len(
    const wuffs_zlib__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_zlib__decoder__transform_io(
    wuffs_zlib__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_zlib__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__io_transformer;
    wuffs_base__vtable null_vtable;

    bool f_bad_call_sequence;
    bool f_header_complete;
    bool f_got_dictionary;
    bool f_want_dictionary;
    bool f_quirks[1];
    bool f_ignore_checksum;
    uint32_t f_dict_id_have;
    uint32_t f_dict_id_want;

    uint32_t p_transform_io;
    uint32_t p_do_transform_io;
  } private_impl;

  struct {
    wuffs_adler32__hasher f_checksum;
    wuffs_adler32__hasher f_dict_id_hasher;
    wuffs_deflate__decoder f_flate;

    struct {
      uint32_t v_checksum_have;
      uint64_t scratch;
    } s_do_transform_io;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_zlib__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_zlib__decoder__alloc());
  }

  static inline wuffs_base__io_transformer::unique_ptr
  alloc_as__wuffs_base__io_transformer() {
    return wuffs_base__io_transformer::unique_ptr(
        wuffs_zlib__decoder__alloc_as__wuffs_base__io_transformer());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_zlib__decoder__struct() = delete;
  wuffs_zlib__decoder__struct(const wuffs_zlib__decoder__struct&) = delete;
  wuffs_zlib__decoder__struct& operator=(
      const wuffs_zlib__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_zlib__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__io_transformer*
  upcast_as__wuffs_base__io_transformer() {
    return (wuffs_base__io_transformer*)this;
  }

  inline uint32_t
  dictionary_id() const {
    return wuffs_zlib__decoder__dictionary_id(this);
  }

  inline wuffs_base__empty_struct
  add_dictionary(
      wuffs_base__slice_u8 a_dict) {
    return wuffs_zlib__decoder__add_dictionary(this, a_dict);
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_zlib__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_zlib__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__optional_u63
  dst_history_retain_length() const {
    return wuffs_zlib__decoder__dst_history_retain_length(this);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_zlib__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  transform_io(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_zlib__decoder__transform_io(this, a_dst, a_src, a_workbuf);
  }

#endif  // __cplusplus
};  // struct wuffs_zlib__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ZLIB) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__PNG) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_png__error__bad_animation_sequence_number[];
extern const char wuffs_png__error__bad_checksum[];
extern const char wuffs_png__error__bad_chunk[];
extern const char wuffs_png__error__bad_filter[];
extern const char wuffs_png__error__bad_header[];
extern const char wuffs_png__error__bad_text_chunk_not_latin_1[];
extern const char wuffs_png__error__missing_palette[];
extern const char wuffs_png__error__truncated_input[];
extern const char wuffs_png__error__unsupported_cgbi_extension[];
extern const char wuffs_png__error__unsupported_png_compression_method[];
extern const char wuffs_png__error__unsupported_png_file[];

// ---------------- Public Consts

#define WUFFS_PNG__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 2251799562027015u

#define WUFFS_PNG__DECODER_SRC_IO_BUFFER_LENGTH_MIN_INCL 8u

// ---------------- Struct Declarations

typedef struct wuffs_png__decoder__struct wuffs_png__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_png__decoder__initialize(
    wuffs_png__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_png__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_png__decoder*
wuffs_png__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_png__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_png__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_png__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_png__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_png__decoder__get_quirk(
    const wuffs_png__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__set_quirk(
    wuffs_png__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__decode_image_config(
    wuffs_png__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__decode_frame_config(
    wuffs_png__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__decode_frame(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_png__decoder__frame_dirty_rect(
    const wuffs_png__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_png__decoder__num_animation_loops(
    const wuffs_png__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_png__decoder__num_decoded_frame_configs(
    const wuffs_png__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_png__decoder__num_decoded_frames(
    const wuffs_png__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__restart_frame(
    wuffs_png__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_png__decoder__set_report_metadata(
    wuffs_png__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__tell_me_more(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_png__decoder__workbuf_len(
    const wuffs_png__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_png__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_width;
    uint32_t f_height;
    uint64_t f_pass_bytes_per_row;
    uint64_t f_workbuf_wi;
    uint64_t f_workbuf_hist_pos_base;
    uint64_t f_overall_workbuf_length;
    uint64_t f_pass_workbuf_length;
    uint8_t f_call_sequence;
    bool f_report_metadata_chrm;
    bool f_report_metadata_exif;
    bool f_report_metadata_gama;
    bool f_report_metadata_iccp;
    bool f_report_metadata_kvp;
    bool f_report_metadata_srgb;
    bool f_ignore_checksum;
    uint8_t f_depth;
    uint8_t f_color_type;
    uint8_t f_filter_distance;
    uint8_t f_interlace_pass;
    bool f_seen_actl;
    bool f_seen_chrm;
    bool f_seen_fctl;
    bool f_seen_exif;
    bool f_seen_gama;
    bool f_seen_iccp;
    bool f_seen_idat;
    bool f_seen_ihdr;
    bool f_seen_plte;
    bool f_seen_srgb;
    bool f_seen_trns;
    bool f_metadata_is_zlib_compressed;
    bool f_zlib_is_dirty;
    uint32_t f_chunk_type;
    uint8_t f_chunk_type_array[4];
    uint32_t f_chunk_length;
    uint64_t f_remap_transparency;
    uint32_t f_dst_pixfmt;
    uint32_t f_src_pixfmt;
    uint32_t f_num_animation_frames_value;
    uint32_t f_num_animation_loops_value;
    uint32_t f_num_decoded_frame_configs_value;
    uint32_t f_num_decoded_frames_value;
    uint32_t f_frame_rect_x0;
    uint32_t f_frame_rect_y0;
    uint32_t f_frame_rect_x1;
    uint32_t f_frame_rect_y1;
    uint32_t f_first_rect_x0;
    uint32_t f_first_rect_y0;
    uint32_t f_first_rect_x1;
    uint32_t f_first_rect_y1;
    uint64_t f_frame_config_io_position;
    uint64_t f_first_config_io_position;
    uint64_t f_frame_duration;
    uint64_t f_first_duration;
    uint8_t f_frame_disposal;
    uint8_t f_first_disposal;
    bool f_frame_overwrite_instead_of_blend;
    bool f_first_overwrite_instead_of_blend;
    uint32_t f_next_animation_seq_num;
    uint32_t f_metadata_flavor;
    uint32_t f_metadata_fourcc;
    uint64_t f_metadata_x;
    uint64_t f_metadata_y;
    uint64_t f_metadata_z;
    uint32_t f_ztxt_ri;
    uint32_t f_ztxt_wi;
    uint64_t f_ztxt_hist_pos;
    wuffs_base__pixel_swizzler f_swizzler;

    wuffs_base__empty_struct (*choosy_filter_1)(
        wuffs_png__decoder* self,
        wuffs_base__slice_u8 a_curr);
    wuffs_base__empty_struct (*choosy_filter_3)(
        wuffs_png__decoder* self,
        wuffs_base__slice_u8 a_curr,
        wuffs_base__slice_u8 a_prev);
    wuffs_base__empty_struct (*choosy_filter_4)(
        wuffs_png__decoder* self,
        wuffs_base__slice_u8 a_curr,
        wuffs_base__slice_u8 a_prev);
    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_ihdr;
    uint32_t p_decode_other_chunk;
    uint32_t p_decode_actl;
    uint32_t p_decode_chrm;
    uint32_t p_decode_fctl;
    uint32_t p_decode_gama;
    uint32_t p_decode_iccp;
    uint32_t p_decode_plte;
    uint32_t p_decode_srgb;
    uint32_t p_decode_trns;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_skip_frame;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
    uint32_t p_decode_pass;
    uint32_t p_tell_me_more;
    uint32_t p_do_tell_me_more;
    wuffs_base__status (*choosy_filter_and_swizzle)(
        wuffs_png__decoder* self,
        wuffs_base__pixel_buffer* a_dst,
        wuffs_base__slice_u8 a_workbuf);
  } private_impl;

  struct {
    wuffs_crc32__ieee_hasher f_crc32;
    wuffs_zlib__decoder f_zlib;
    uint8_t f_dst_palette[1024];
    uint8_t f_src_palette[1024];

    struct {
      uint32_t v_checksum_have;
      uint64_t scratch;
    } s_do_decode_image_config;
    struct {
      uint64_t scratch;
    } s_decode_ihdr;
    struct {
      uint64_t scratch;
    } s_decode_other_chunk;
    struct {
      uint64_t scratch;
    } s_decode_actl;
    struct {
      uint64_t scratch;
    } s_decode_chrm;
    struct {
      uint32_t v_x0;
      uint32_t v_x1;
      uint32_t v_y1;
      uint64_t scratch;
    } s_decode_fctl;
    struct {
      uint64_t scratch;
    } s_decode_gama;
    struct {
      uint32_t v_num_entries;
      uint32_t v_i;
      uint64_t scratch;
    } s_decode_plte;
    struct {
      uint32_t v_i;
      uint32_t v_n;
      uint64_t scratch;
    } s_decode_trns;
    struct {
      uint64_t scratch;
    } s_do_decode_frame_config;
    struct {
      uint64_t scratch;
    } s_skip_frame;
    struct {
      uint64_t scratch;
    } s_do_decode_frame;
    struct {
      uint64_t scratch;
    } s_decode_pass;
    struct {
      wuffs_base__status v_zlib_status;
      uint64_t scratch;
    } s_do_tell_me_more;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_png__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_png__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_png__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_png__decoder__struct() = delete;
  wuffs_png__decoder__struct(const wuffs_png__decoder__struct&) = delete;
  wuffs_png__decoder__struct& operator=(
      const wuffs_png__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_png__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_png__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_png__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_png__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_png__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_png__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_png__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_png__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_png__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_png__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_png__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_png__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_png__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_png__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_png__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__PNG) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__QOI) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_qoi__error__bad_footer[];
extern const char wuffs_qoi__error__bad_header[];
extern const char wuffs_qoi__error__truncated_input[];

// ---------------- Public Consts

#define WUFFS_QOI__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_qoi__decoder__struct wuffs_qoi__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_qoi__decoder__initialize(
    wuffs_qoi__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_qoi__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_qoi__decoder*
wuffs_qoi__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_qoi__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_qoi__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_qoi__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_qoi__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_qoi__decoder__get_quirk(
    const wuffs_qoi__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__set_quirk(
    wuffs_qoi__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__decode_image_config(
    wuffs_qoi__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__decode_frame_config(
    wuffs_qoi__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__decode_frame(
    wuffs_qoi__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_qoi__decoder__frame_dirty_rect(
    const wuffs_qoi__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_qoi__decoder__num_animation_loops(
    const wuffs_qoi__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_qoi__decoder__num_decoded_frame_configs(
    const wuffs_qoi__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_qoi__decoder__num_decoded_frames(
    const wuffs_qoi__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__restart_frame(
    wuffs_qoi__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_qoi__decoder__set_report_metadata(
    wuffs_qoi__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__tell_me_more(
    wuffs_qoi__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_qoi__decoder__workbuf_len(
    const wuffs_qoi__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_qoi__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_pixfmt;
    uint32_t f_width;
    uint32_t f_height;
    uint64_t f_remaining_pixels_times_4;
    uint8_t f_call_sequence;
    uint32_t f_buffer_index;
    uint32_t f_dst_x;
    uint32_t f_dst_y;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
    uint32_t p_from_src_to_buffer;
  } private_impl;

  struct {
    uint8_t f_pixel[4];
    uint8_t f_cache[256];
    uint8_t f_buffer[8196];

    struct {
      uint64_t scratch;
    } s_do_decode_image_config;
    struct {
      uint64_t scratch;
    } s_do_decode_frame;
    struct {
      uint8_t v_dg;
      uint32_t v_bi;
      uint32_t v_bk;
    } s_from_src_to_buffer;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_qoi__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_qoi__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_qoi__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_qoi__decoder__struct() = delete;
  wuffs_qoi__decoder__struct(const wuffs_qoi__decoder__struct&) = delete;
  wuffs_qoi__decoder__struct& operator=(
      const wuffs_qoi__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_qoi__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_qoi__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_qoi__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_qoi__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_qoi__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_qoi__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_qoi__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_qoi__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_qoi__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_qoi__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_qoi__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_qoi__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_qoi__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_qoi__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_qoi__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__QOI) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__SHA256) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

// ---------------- Public Consts

// ---------------- Struct Declarations

typedef struct wuffs_sha256__hasher__struct wuffs_sha256__hasher;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_sha256__hasher__initialize(
    wuffs_sha256__hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_sha256__hasher(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_sha256__hasher*
wuffs_sha256__hasher__alloc(void);

static inline wuffs_base__hasher_bitvec256*
wuffs_sha256__hasher__alloc_as__wuffs_base__hasher_bitvec256(void) {
  return (wuffs_base__hasher_bitvec256*)(wuffs_sha256__hasher__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__hasher_bitvec256*
wuffs_sha256__hasher__upcast_as__wuffs_base__hasher_bitvec256(
    wuffs_sha256__hasher* p) {
  return (wuffs_base__hasher_bitvec256*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_sha256__hasher__get_quirk(
    const wuffs_sha256__hasher* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_sha256__hasher__set_quirk(
    wuffs_sha256__hasher* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_sha256__hasher__update(
    wuffs_sha256__hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__bitvec256
wuffs_sha256__hasher__update_bitvec256(
    wuffs_sha256__hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__bitvec256
wuffs_sha256__hasher__checksum_bitvec256(
    const wuffs_sha256__hasher* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_sha256__hasher__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__hasher_bitvec256;
    wuffs_base__vtable null_vtable;

    uint64_t f_length_modulo_u64;
    bool f_length_overflows_u64;
    uint8_t f_padding0;
    uint8_t f_padding1;
    uint8_t f_padding2;
    uint32_t f_buf_len;
    uint8_t f_buf_data[64];
    uint32_t f_h0;
    uint32_t f_h1;
    uint32_t f_h2;
    uint32_t f_h3;
    uint32_t f_h4;
    uint32_t f_h5;
    uint32_t f_h6;
    uint32_t f_h7;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_sha256__hasher, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_sha256__hasher__alloc());
  }

  static inline wuffs_base__hasher_bitvec256::unique_ptr
  alloc_as__wuffs_base__hasher_bitvec256() {
    return wuffs_base__hasher_bitvec256::unique_ptr(
        wuffs_sha256__hasher__alloc_as__wuffs_base__hasher_bitvec256());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_sha256__hasher__struct() = delete;
  wuffs_sha256__hasher__struct(const wuffs_sha256__hasher__struct&) = delete;
  wuffs_sha256__hasher__struct& operator=(
      const wuffs_sha256__hasher__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_sha256__hasher__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__hasher_bitvec256*
  upcast_as__wuffs_base__hasher_bitvec256() {
    return (wuffs_base__hasher_bitvec256*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_sha256__hasher__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_sha256__hasher__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  update(
      wuffs_base__slice_u8 a_x) {
    return wuffs_sha256__hasher__update(this, a_x);
  }

  inline wuffs_base__bitvec256
  update_bitvec256(
      wuffs_base__slice_u8 a_x) {
    return wuffs_sha256__hasher__update_bitvec256(this, a_x);
  }

  inline wuffs_base__bitvec256
  checksum_bitvec256() const {
    return wuffs_sha256__hasher__checksum_bitvec256(this);
  }

#endif  // __cplusplus
};  // struct wuffs_sha256__hasher__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__SHA256) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__TARGA) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_targa__error__bad_header[];
extern const char wuffs_targa__error__bad_run_length_encoding[];
extern const char wuffs_targa__error__truncated_input[];
extern const char wuffs_targa__error__unsupported_targa_file[];

// ---------------- Public Consts

#define WUFFS_TARGA__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_targa__decoder__struct wuffs_targa__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_targa__decoder__initialize(
    wuffs_targa__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_targa__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_targa__decoder*
wuffs_targa__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_targa__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_targa__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_targa__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_targa__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_targa__decoder__get_quirk(
    const wuffs_targa__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__set_quirk(
    wuffs_targa__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__decode_image_config(
    wuffs_targa__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__decode_frame_config(
    wuffs_targa__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__decode_frame(
    wuffs_targa__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_targa__decoder__frame_dirty_rect(
    const wuffs_targa__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_targa__decoder__num_animation_loops(
    const wuffs_targa__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_targa__decoder__num_decoded_frame_configs(
    const wuffs_targa__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_targa__decoder__num_decoded_frames(
    const wuffs_targa__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__restart_frame(
    wuffs_targa__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_targa__decoder__set_report_metadata(
    wuffs_targa__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__tell_me_more(
    wuffs_targa__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_targa__decoder__workbuf_len(
    const wuffs_targa__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_targa__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_width;
    uint32_t f_height;
    uint8_t f_call_sequence;
    uint8_t f_header_id_length;
    uint8_t f_header_color_map_type;
    uint8_t f_header_image_type;
    uint16_t f_header_color_map_first_entry_index;
    uint16_t f_header_color_map_length;
    uint8_t f_header_color_map_entry_size;
    uint8_t f_header_pixel_depth;
    uint8_t f_header_image_descriptor;
    bool f_opaque;
    uint32_t f_scratch_bytes_per_pixel;
    uint32_t f_src_bytes_per_pixel;
    uint32_t f_src_pixfmt;
    uint64_t f_frame_config_io_position;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
  } private_impl;

  struct {
    uint8_t f_dst_palette[1024];
    uint8_t f_src_palette[1024];
    uint8_t f_scratch[4];

    struct {
      uint32_t v_i;
      uint64_t scratch;
    } s_do_decode_image_config;
    struct {
      uint64_t v_dst_bytes_per_pixel;
      uint32_t v_dst_x;
      uint32_t v_dst_y;
      uint64_t v_mark;
      uint32_t v_num_pixels32;
      uint32_t v_lit_length;
      uint32_t v_run_length;
      uint64_t v_num_dst_bytes;
      uint64_t scratch;
    } s_do_decode_frame;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_targa__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_targa__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_targa__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_targa__decoder__struct() = delete;
  wuffs_targa__decoder__struct(const wuffs_targa__decoder__struct&) = delete;
  wuffs_targa__decoder__struct& operator=(
      const wuffs_targa__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_targa__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_targa__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_targa__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_targa__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_targa__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_targa__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_targa__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_targa__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_targa__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_targa__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_targa__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_targa__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_targa__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_targa__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_targa__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__TARGA) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__THUMBHASH) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_thumbhash__error__bad_header[];
extern const char wuffs_thumbhash__error__truncated_input[];

// ---------------- Public Consts

#define WUFFS_THUMBHASH__QUIRK_JUST_RAW_THUMBHASH 1712283648u

#define WUFFS_THUMBHASH__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_thumbhash__decoder__struct wuffs_thumbhash__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_thumbhash__decoder__initialize(
    wuffs_thumbhash__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_thumbhash__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_thumbhash__decoder*
wuffs_thumbhash__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_thumbhash__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_thumbhash__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_thumbhash__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_thumbhash__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_thumbhash__decoder__get_quirk(
    const wuffs_thumbhash__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__set_quirk(
    wuffs_thumbhash__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__decode_image_config(
    wuffs_thumbhash__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__decode_frame_config(
    wuffs_thumbhash__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__decode_frame(
    wuffs_thumbhash__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_thumbhash__decoder__frame_dirty_rect(
    const wuffs_thumbhash__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_thumbhash__decoder__num_animation_loops(
    const wuffs_thumbhash__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_thumbhash__decoder__num_decoded_frame_configs(
    const wuffs_thumbhash__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_thumbhash__decoder__num_decoded_frames(
    const wuffs_thumbhash__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__restart_frame(
    wuffs_thumbhash__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_thumbhash__decoder__set_report_metadata(
    wuffs_thumbhash__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__tell_me_more(
    wuffs_thumbhash__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_thumbhash__decoder__workbuf_len(
    const wuffs_thumbhash__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_thumbhash__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_pixfmt;
    uint8_t f_w_dimension_code;
    uint8_t f_h_dimension_code;
    uint8_t f_call_sequence;
    uint8_t f_frame_config_io_position;
    uint64_t f_l_dc;
    uint64_t f_p_dc;
    uint64_t f_q_dc;
    uint64_t f_a_dc;
    bool f_quirk_just_raw_thumbhash;
    uint8_t f_l_scale;
    uint8_t f_p_scale;
    uint8_t f_q_scale;
    uint8_t f_a_scale;
    uint8_t f_has_alpha;
    uint8_t f_l_count;
    uint8_t f_is_landscape;
    uint32_t f_lx;
    uint32_t f_ly;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
    uint32_t p_from_src_to_coeffs;
  } private_impl;

  struct {
    uint32_t f_lac[32];
    uint32_t f_pac[8];
    uint32_t f_qac[8];
    uint32_t f_aac[16];
    uint8_t f_pixels[32][128];

    struct {
      uint64_t scratch;
    } s_do_decode_image_config;
    struct {
      uint32_t v_cy;
      uint32_t v_cx;
      uint32_t v_i;
      bool v_has_bits;
    } s_from_src_to_coeffs;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_thumbhash__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_thumbhash__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_thumbhash__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_thumbhash__decoder__struct() = delete;
  wuffs_thumbhash__decoder__struct(const wuffs_thumbhash__decoder__struct&) = delete;
  wuffs_thumbhash__decoder__struct& operator=(
      const wuffs_thumbhash__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_thumbhash__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_thumbhash__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_thumbhash__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_thumbhash__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_thumbhash__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_thumbhash__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_thumbhash__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_thumbhash__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_thumbhash__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_thumbhash__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_thumbhash__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_thumbhash__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_thumbhash__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_thumbhash__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_thumbhash__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__THUMBHASH) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__VP8) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_vp8__error__bad_header[];
extern const char wuffs_vp8__error__truncated_input[];
extern const char wuffs_vp8__error__unsupported_vp8_file[];

// ---------------- Public Consts

#define WUFFS_VP8__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_vp8__decoder__struct wuffs_vp8__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_vp8__decoder__initialize(
    wuffs_vp8__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_vp8__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_vp8__decoder*
wuffs_vp8__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_vp8__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_vp8__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_vp8__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_vp8__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_vp8__decoder__get_quirk(
    const wuffs_vp8__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__set_quirk(
    wuffs_vp8__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__decode_image_config(
    wuffs_vp8__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__decode_frame_config(
    wuffs_vp8__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__decode_frame(
    wuffs_vp8__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_vp8__decoder__frame_dirty_rect(
    const wuffs_vp8__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_vp8__decoder__num_animation_loops(
    const wuffs_vp8__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_vp8__decoder__num_decoded_frame_configs(
    const wuffs_vp8__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_vp8__decoder__num_decoded_frames(
    const wuffs_vp8__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__restart_frame(
    wuffs_vp8__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_vp8__decoder__set_report_metadata(
    wuffs_vp8__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__tell_me_more(
    wuffs_vp8__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_vp8__decoder__workbuf_len(
    const wuffs_vp8__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_vp8__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_width;
    uint32_t f_height;
    uint8_t f_call_sequence;
    uint64_t f_frame_config_io_position;
    uint32_t f_dst_x;
    uint32_t f_dst_y;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
  } private_impl;

  struct {
    struct {
      uint64_t scratch;
    } s_do_decode_image_config;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_vp8__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_vp8__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_vp8__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_vp8__decoder__struct() = delete;
  wuffs_vp8__decoder__struct(const wuffs_vp8__decoder__struct&) = delete;
  wuffs_vp8__decoder__struct& operator=(
      const wuffs_vp8__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_vp8__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_vp8__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_vp8__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_vp8__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_vp8__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_vp8__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_vp8__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_vp8__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_vp8__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_vp8__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_vp8__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_vp8__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_vp8__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_vp8__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_vp8__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__VP8) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WBMP) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_wbmp__error__bad_header[];
extern const char wuffs_wbmp__error__truncated_input[];

// ---------------- Public Consts

#define WUFFS_WBMP__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_wbmp__decoder__struct wuffs_wbmp__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_wbmp__decoder__initialize(
    wuffs_wbmp__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_wbmp__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_wbmp__decoder*
wuffs_wbmp__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_wbmp__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_wbmp__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_wbmp__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_wbmp__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_wbmp__decoder__get_quirk(
    const wuffs_wbmp__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__set_quirk(
    wuffs_wbmp__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__decode_image_config(
    wuffs_wbmp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__decode_frame_config(
    wuffs_wbmp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__decode_frame(
    wuffs_wbmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_wbmp__decoder__frame_dirty_rect(
    const wuffs_wbmp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_wbmp__decoder__num_animation_loops(
    const wuffs_wbmp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_wbmp__decoder__num_decoded_frame_configs(
    const wuffs_wbmp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_wbmp__decoder__num_decoded_frames(
    const wuffs_wbmp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__restart_frame(
    wuffs_wbmp__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_wbmp__decoder__set_report_metadata(
    wuffs_wbmp__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__tell_me_more(
    wuffs_wbmp__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_wbmp__decoder__workbuf_len(
    const wuffs_wbmp__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_wbmp__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_width;
    uint32_t f_height;
    uint8_t f_call_sequence;
    uint64_t f_frame_config_io_position;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
  } private_impl;

  struct {
    struct {
      uint32_t v_i;
      uint32_t v_p;
    } s_do_decode_image_config;
    struct {
      uint64_t v_dst_bytes_per_pixel;
      uint32_t v_dst_x;
      uint32_t v_dst_y;
      uint8_t v_src[1];
      uint8_t v_c8;
    } s_do_decode_frame;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_wbmp__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_wbmp__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_wbmp__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_wbmp__decoder__struct() = delete;
  wuffs_wbmp__decoder__struct(const wuffs_wbmp__decoder__struct&) = delete;
  wuffs_wbmp__decoder__struct& operator=(
      const wuffs_wbmp__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_wbmp__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_wbmp__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_wbmp__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_wbmp__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_wbmp__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_wbmp__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_wbmp__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_wbmp__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_wbmp__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_wbmp__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_wbmp__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_wbmp__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_wbmp__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_wbmp__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_wbmp__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WBMP) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WEBP) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_webp__error__bad_huffman_code_over_subscribed[];
extern const char wuffs_webp__error__bad_huffman_code_under_subscribed[];
extern const char wuffs_webp__error__bad_huffman_code[];
extern const char wuffs_webp__error__bad_back_reference[];
extern const char wuffs_webp__error__bad_color_cache[];
extern const char wuffs_webp__error__bad_header[];
extern const char wuffs_webp__error__bad_transform[];
extern const char wuffs_webp__error__short_chunk[];
extern const char wuffs_webp__error__truncated_input[];
extern const char wuffs_webp__error__unsupported_number_of_huffman_groups[];
extern const char wuffs_webp__error__unsupported_transform_after_color_indexing_transform[];
extern const char wuffs_webp__error__unsupported_webp_file[];

// ---------------- Public Consts

#define WUFFS_WEBP__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0u

// ---------------- Struct Declarations

typedef struct wuffs_webp__decoder__struct wuffs_webp__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_webp__decoder__initialize(
    wuffs_webp__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_webp__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_webp__decoder*
wuffs_webp__decoder__alloc(void);

static inline wuffs_base__image_decoder*
wuffs_webp__decoder__alloc_as__wuffs_base__image_decoder(void) {
  return (wuffs_base__image_decoder*)(wuffs_webp__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__image_decoder*
wuffs_webp__decoder__upcast_as__wuffs_base__image_decoder(
    wuffs_webp__decoder* p) {
  return (wuffs_base__image_decoder*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_webp__decoder__get_quirk(
    const wuffs_webp__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__set_quirk(
    wuffs_webp__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__decode_image_config(
    wuffs_webp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__decode_frame_config(
    wuffs_webp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__decode_frame(
    wuffs_webp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_webp__decoder__frame_dirty_rect(
    const wuffs_webp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_webp__decoder__num_animation_loops(
    const wuffs_webp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_webp__decoder__num_decoded_frame_configs(
    const wuffs_webp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_webp__decoder__num_decoded_frames(
    const wuffs_webp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__restart_frame(
    wuffs_webp__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_webp__decoder__set_report_metadata(
    wuffs_webp__decoder* self,
    uint32_t a_fourcc,
    bool a_report);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__tell_me_more(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_webp__decoder__workbuf_len(
    const wuffs_webp__decoder* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_webp__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__image_decoder;
    wuffs_base__vtable null_vtable;

    uint32_t f_pixfmt;
    uint32_t f_width;
    uint32_t f_height;
    uint8_t f_call_sequence;
    uint8_t f_code_length_code_lengths[19];
    bool f_sub_chunk_has_padding;
    bool f_is_vp8_lossy;
    uint64_t f_frame_config_io_position;
    uint32_t f_riff_chunk_length;
    uint32_t f_sub_chunk_length;
    uint32_t f_bits;
    uint32_t f_n_bits;
    bool f_seen_transform[4];
    uint8_t f_transform_type[4];
    uint8_t f_transform_tile_size_log2[4];
    uint32_t f_n_transforms;
    uint32_t f_color_cache_bits;
    uint32_t f_overall_color_cache_bits;
    uint32_t f_overall_tile_size_log2;
    uint32_t f_overall_n_huffman_groups;
    uint32_t f_ht_n_symbols;
    uint32_t f_ht_code_lengths_remaining;
    uint32_t f_color_indexing_palette_size;
    uint32_t f_color_indexing_width;
    uint32_t f_workbuf_offset_for_transform[4];
    uint32_t f_workbuf_offset_for_color_indexing;
    wuffs_base__pixel_swizzler f_swizzler;

    uint32_t p_decode_huffman_groups;
    uint32_t p_decode_huffman_tree;
    uint32_t p_decode_huffman_tree_simple;
    uint32_t p_decode_code_length_code_lengths;
    uint32_t p_build_code_lengths;
    uint32_t p_decode_pixels_slow;
    uint32_t p_decode_image_config;
    uint32_t p_do_decode_image_config;
    uint32_t p_do_decode_image_config_limited;
    uint32_t p_do_decode_image_config_limited_vp8l;
    uint32_t p_decode_frame_config;
    uint32_t p_do_decode_frame_config;
    uint32_t p_decode_frame;
    uint32_t p_do_decode_frame;
    uint32_t p_decode_transform;
    uint32_t p_decode_color_cache_parameters;
    uint32_t p_decode_hg_table;
    uint32_t p_decode_pixels;
  } private_impl;

  struct {
    wuffs_vp8__decoder f_vp8;
    uint8_t f_palette[1024];
    uint32_t f_color_cache[2048];
    uint16_t f_codes[2328];
    uint16_t f_code_lengths[2328];
    uint16_t f_code_lengths_huffman_nodes[37];
    uint16_t f_huffman_nodes[256][6267];

    struct {
      uint32_t v_hg;
      uint32_t v_ht;
    } s_decode_huffman_groups;
    struct {
      uint32_t v_use_second_symbol;
      uint32_t v_first_symbol_n_bits;
      uint32_t v_symbol0;
      uint32_t v_base_offset;
    } s_decode_huffman_tree_simple;
    struct {
      uint32_t v_n_codes;
      uint32_t v_i;
    } s_decode_code_length_code_lengths;
    struct {
      uint32_t v_length_n_bits;
      uint16_t v_prev_code_length;
      uint32_t v_s;
      uint32_t v_s_max;
      uint16_t v_node;
      uint16_t v_repeat_value;
      uint32_t v_repeat_n_bits;
    } s_build_code_lengths;
    struct {
      uint64_t v_p;
      uint64_t v_p_max;
      uint32_t v_tile_size_log2;
      uint32_t v_width_in_tiles;
      uint32_t v_x;
      uint32_t v_y;
      uint32_t v_hg;
      uint16_t v_node;
      uint32_t v_color;
      uint32_t v_back_ref_len_n_bits;
      uint32_t v_back_ref_len_minus_1;
      uint32_t v_back_ref_dist_n_bits;
      uint32_t v_back_ref_dist_premap_minus_1;
      uint64_t v_color_cache_p;
    } s_decode_pixels_slow;
    struct {
      uint64_t scratch;
    } s_do_decode_image_config;
    struct {
      uint64_t scratch;
    } s_do_decode_image_config_limited;
    struct {
      uint64_t scratch;
    } s_do_decode_image_config_limited_vp8l;
    struct {
      uint32_t v_width;
    } s_do_decode_frame;
    struct {
      uint32_t v_transform_type;
      uint32_t v_tile_size_log2;
    } s_decode_transform;
    struct {
      uint32_t v_tile_size_log2;
    } s_decode_hg_table;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_webp__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_webp__decoder__alloc());
  }

  static inline wuffs_base__image_decoder::unique_ptr
  alloc_as__wuffs_base__image_decoder() {
    return wuffs_base__image_decoder::unique_ptr(
        wuffs_webp__decoder__alloc_as__wuffs_base__image_decoder());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_webp__decoder__struct() = delete;
  wuffs_webp__decoder__struct(const wuffs_webp__decoder__struct&) = delete;
  wuffs_webp__decoder__struct& operator=(
      const wuffs_webp__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_webp__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__image_decoder*
  upcast_as__wuffs_base__image_decoder() {
    return (wuffs_base__image_decoder*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_webp__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_webp__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__status
  decode_image_config(
      wuffs_base__image_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_webp__decoder__decode_image_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame_config(
      wuffs_base__frame_config* a_dst,
      wuffs_base__io_buffer* a_src) {
    return wuffs_webp__decoder__decode_frame_config(this, a_dst, a_src);
  }

  inline wuffs_base__status
  decode_frame(
      wuffs_base__pixel_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__pixel_blend a_blend,
      wuffs_base__slice_u8 a_workbuf,
      wuffs_base__decode_frame_options* a_opts) {
    return wuffs_webp__decoder__decode_frame(this, a_dst, a_src, a_blend, a_workbuf, a_opts);
  }

  inline wuffs_base__rect_ie_u32
  frame_dirty_rect() const {
    return wuffs_webp__decoder__frame_dirty_rect(this);
  }

  inline uint32_t
  num_animation_loops() const {
    return wuffs_webp__decoder__num_animation_loops(this);
  }

  inline uint64_t
  num_decoded_frame_configs() const {
    return wuffs_webp__decoder__num_decoded_frame_configs(this);
  }

  inline uint64_t
  num_decoded_frames() const {
    return wuffs_webp__decoder__num_decoded_frames(this);
  }

  inline wuffs_base__status
  restart_frame(
      uint64_t a_index,
      uint64_t a_io_position) {
    return wuffs_webp__decoder__restart_frame(this, a_index, a_io_position);
  }

  inline wuffs_base__empty_struct
  set_report_metadata(
      uint32_t a_fourcc,
      bool a_report) {
    return wuffs_webp__decoder__set_report_metadata(this, a_fourcc, a_report);
  }

  inline wuffs_base__status
  tell_me_more(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
    return wuffs_webp__decoder__tell_me_more(this, a_dst, a_minfo, a_src);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_webp__decoder__workbuf_len(this);
  }

#endif  // __cplusplus
};  // struct wuffs_webp__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WEBP) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XXHASH32) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

// ---------------- Public Consts

// ---------------- Struct Declarations

typedef struct wuffs_xxhash32__hasher__struct wuffs_xxhash32__hasher;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_xxhash32__hasher__initialize(
    wuffs_xxhash32__hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_xxhash32__hasher(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_xxhash32__hasher*
wuffs_xxhash32__hasher__alloc(void);

static inline wuffs_base__hasher_u32*
wuffs_xxhash32__hasher__alloc_as__wuffs_base__hasher_u32(void) {
  return (wuffs_base__hasher_u32*)(wuffs_xxhash32__hasher__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__hasher_u32*
wuffs_xxhash32__hasher__upcast_as__wuffs_base__hasher_u32(
    wuffs_xxhash32__hasher* p) {
  return (wuffs_base__hasher_u32*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xxhash32__hasher__get_quirk(
    const wuffs_xxhash32__hasher* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_xxhash32__hasher__set_quirk(
    wuffs_xxhash32__hasher* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_xxhash32__hasher__update(
    wuffs_xxhash32__hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_xxhash32__hasher__update_u32(
    wuffs_xxhash32__hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_xxhash32__hasher__checksum_u32(
    const wuffs_xxhash32__hasher* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_xxhash32__hasher__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__hasher_u32;
    wuffs_base__vtable null_vtable;

    uint32_t f_length_modulo_u32;
    bool f_length_overflows_u32;
    uint8_t f_padding0;
    uint8_t f_padding1;
    uint8_t f_buf_len;
    uint8_t f_buf_data[16];
    uint32_t f_v0;
    uint32_t f_v1;
    uint32_t f_v2;
    uint32_t f_v3;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_xxhash32__hasher, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_xxhash32__hasher__alloc());
  }

  static inline wuffs_base__hasher_u32::unique_ptr
  alloc_as__wuffs_base__hasher_u32() {
    return wuffs_base__hasher_u32::unique_ptr(
        wuffs_xxhash32__hasher__alloc_as__wuffs_base__hasher_u32());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_xxhash32__hasher__struct() = delete;
  wuffs_xxhash32__hasher__struct(const wuffs_xxhash32__hasher__struct&) = delete;
  wuffs_xxhash32__hasher__struct& operator=(
      const wuffs_xxhash32__hasher__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_xxhash32__hasher__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__hasher_u32*
  upcast_as__wuffs_base__hasher_u32() {
    return (wuffs_base__hasher_u32*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_xxhash32__hasher__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_xxhash32__hasher__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  update(
      wuffs_base__slice_u8 a_x) {
    return wuffs_xxhash32__hasher__update(this, a_x);
  }

  inline uint32_t
  update_u32(
      wuffs_base__slice_u8 a_x) {
    return wuffs_xxhash32__hasher__update_u32(this, a_x);
  }

  inline uint32_t
  checksum_u32() const {
    return wuffs_xxhash32__hasher__checksum_u32(this);
  }

#endif  // __cplusplus
};  // struct wuffs_xxhash32__hasher__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XXHASH32) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XXHASH64) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

// ---------------- Public Consts

// ---------------- Struct Declarations

typedef struct wuffs_xxhash64__hasher__struct wuffs_xxhash64__hasher;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_xxhash64__hasher__initialize(
    wuffs_xxhash64__hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_xxhash64__hasher(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_xxhash64__hasher*
wuffs_xxhash64__hasher__alloc(void);

static inline wuffs_base__hasher_u64*
wuffs_xxhash64__hasher__alloc_as__wuffs_base__hasher_u64(void) {
  return (wuffs_base__hasher_u64*)(wuffs_xxhash64__hasher__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__hasher_u64*
wuffs_xxhash64__hasher__upcast_as__wuffs_base__hasher_u64(
    wuffs_xxhash64__hasher* p) {
  return (wuffs_base__hasher_u64*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xxhash64__hasher__get_quirk(
    const wuffs_xxhash64__hasher* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_xxhash64__hasher__set_quirk(
    wuffs_xxhash64__hasher* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_xxhash64__hasher__update(
    wuffs_xxhash64__hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xxhash64__hasher__update_u64(
    wuffs_xxhash64__hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xxhash64__hasher__checksum_u64(
    const wuffs_xxhash64__hasher* self);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_xxhash64__hasher__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__hasher_u64;
    wuffs_base__vtable null_vtable;

    uint64_t f_length_modulo_u64;
    bool f_length_overflows_u64;
    uint8_t f_padding0;
    uint8_t f_padding1;
    uint8_t f_padding2;
    uint32_t f_buf_len;
    uint8_t f_buf_data[32];
    uint64_t f_v0;
    uint64_t f_v1;
    uint64_t f_v2;
    uint64_t f_v3;
  } private_impl;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_xxhash64__hasher, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_xxhash64__hasher__alloc());
  }

  static inline wuffs_base__hasher_u64::unique_ptr
  alloc_as__wuffs_base__hasher_u64() {
    return wuffs_base__hasher_u64::unique_ptr(
        wuffs_xxhash64__hasher__alloc_as__wuffs_base__hasher_u64());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_xxhash64__hasher__struct() = delete;
  wuffs_xxhash64__hasher__struct(const wuffs_xxhash64__hasher__struct&) = delete;
  wuffs_xxhash64__hasher__struct& operator=(
      const wuffs_xxhash64__hasher__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_xxhash64__hasher__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__hasher_u64*
  upcast_as__wuffs_base__hasher_u64() {
    return (wuffs_base__hasher_u64*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_xxhash64__hasher__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_xxhash64__hasher__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__empty_struct
  update(
      wuffs_base__slice_u8 a_x) {
    return wuffs_xxhash64__hasher__update(this, a_x);
  }

  inline uint64_t
  update_u64(
      wuffs_base__slice_u8 a_x) {
    return wuffs_xxhash64__hasher__update_u64(this, a_x);
  }

  inline uint64_t
  checksum_u64() const {
    return wuffs_xxhash64__hasher__checksum_u64(this);
  }

#endif  // __cplusplus
};  // struct wuffs_xxhash64__hasher__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XXHASH64) || defined(WUFFS_NONMONOLITHIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XZ) || defined(WUFFS_NONMONOLITHIC)

// ---------------- Status Codes

extern const char wuffs_xz__error__bad_bcj_offset[];
extern const char wuffs_xz__error__bad_block_header[];
extern const char wuffs_xz__error__bad_checksum[];
extern const char wuffs_xz__error__bad_filter[];
extern const char wuffs_xz__error__bad_footer[];
extern const char wuffs_xz__error__bad_header[];
extern const char wuffs_xz__error__bad_header_concatenated_stream[];
extern const char wuffs_xz__error__bad_index[];
extern const char wuffs_xz__error__bad_padding[];
extern const char wuffs_xz__error__truncated_input[];
extern const char wuffs_xz__error__unsupported_checksum_algorithm[];
extern const char wuffs_xz__error__unsupported_filter[];
extern const char wuffs_xz__error__unsupported_filter_combination[];

// ---------------- Public Consts

#define WUFFS_XZ__QUIRK_DECODE_STANDALONE_CONCATENATED_STREAMS 1963655168u

#define WUFFS_XZ__DECODER_DST_HISTORY_RETAIN_LENGTH_MAX_INCL_WORST_CASE 0u

#define WUFFS_XZ__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 4294967568u

// ---------------- Struct Declarations

typedef struct wuffs_xz__decoder__struct wuffs_xz__decoder;

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Public Initializer Prototypes

// For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self,
// etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)".
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
// Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for options.

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_xz__decoder__initialize(
    wuffs_xz__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options);

size_t
sizeof__wuffs_xz__decoder(void);

// ---------------- Allocs

// These functions allocate and initialize Wuffs structs. They return NULL if
// memory allocation fails. If they return non-NULL, there is no need to call
// wuffs_foo__bar__initialize, but the caller is responsible for eventually
// calling free on the returned pointer. That pointer is effectively a C++
// std::unique_ptr<T, wuffs_unique_ptr_deleter>.

wuffs_xz__decoder*
wuffs_xz__decoder__alloc(void);

static inline wuffs_base__io_transformer*
wuffs_xz__decoder__alloc_as__wuffs_base__io_transformer(void) {
  return (wuffs_base__io_transformer*)(wuffs_xz__decoder__alloc());
}

// ---------------- Upcasts

static inline wuffs_base__io_transformer*
wuffs_xz__decoder__upcast_as__wuffs_base__io_transformer(
    wuffs_xz__decoder* p) {
  return (wuffs_base__io_transformer*)p;
}

// ---------------- Public Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xz__decoder__get_quirk(
    const wuffs_xz__decoder* self,
    uint32_t a_key);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_xz__decoder__set_quirk(
    wuffs_xz__decoder* self,
    uint32_t a_key,
    uint64_t a_value);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_xz__decoder__dst_history_retain_length(
    const wuffs_xz__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_xz__decoder__workbuf_len(
    const wuffs_xz__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_xz__decoder__transform_io(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

#ifdef __cplusplus
}  // extern "C"
#endif

// ---------------- Struct Definitions

// These structs' fields, and the sizeof them, are private implementation
// details that aren't guaranteed to be stable across Wuffs versions.
//
// See https://en.wikipedia.org/wiki/Opaque_pointer#C

#if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

struct wuffs_xz__decoder__struct {
  // Do not access the private_impl's or private_data's fields directly. There
  // is no API/ABI compatibility or safety guarantee if you do so. Instead, use
  // the wuffs_foo__bar__baz functions.
  //
  // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct
  // can be stack allocated when WUFFS_IMPLEMENTATION is defined.

  struct {
    uint32_t magic;
    uint32_t active_coroutine;
    wuffs_base__vtable vtable_for__wuffs_base__io_transformer;
    wuffs_base__vtable null_vtable;

    uint32_t f_filters[3];
    uint32_t f_num_non_final_filters;
    uint8_t f_checksummer;
    bool f_ignore_checksum;
    bool f_standalone_format;
    bool f_lzma_needs_reset;
    bool f_block_has_compressed_size;
    bool f_block_has_uncompressed_size;
    uint8_t f_bcj_undo_index;
    uint32_t f_bcj_pos;
    uint32_t f_bcj_x86_prev_mask;
    uint64_t f_block_compressed_size;
    uint64_t f_block_uncompressed_size;
    uint64_t f_compressed_size_for_index;
    uint32_t f_verification_have_hashed_sizes[2];
    uint32_t f_verification_want_hashed_sizes[2];
    uint64_t f_verification_have_total_sizes[2];
    uint64_t f_verification_want_total_sizes[2];
    uint64_t f_num_actual_blocks;
    uint64_t f_num_index_blocks;
    uint64_t f_index_block_compressed_size;
    uint64_t f_index_block_uncompressed_size;
    uint64_t f_backwards_size;
    bool f_started_verify_index;
    uint16_t f_flags;

    uint8_t (*choosy_apply_non_final_filters)(
        wuffs_xz__decoder* self,
        wuffs_base__slice_u8 a_dst_slice);
    uint32_t p_transform_io;
    uint32_t p_do_transform_io;
    uint32_t p_decode_block_header_with_padding;
    uint32_t p_decode_block_header_sans_padding;
    uint32_t p_verify_index;
    uint32_t p_verify_footer;
  } private_impl;

  struct {
    uint8_t f_filter_data[3][256];
    wuffs_crc32__ieee_hasher f_crc32;
    wuffs_crc64__ecma_hasher f_crc64;
    wuffs_sha256__hasher f_sha256;
    wuffs_lzma__decoder f_lzma;

    struct {
      uint32_t v_checksum32_have;
      uint32_t v_checksum32_want;
      wuffs_base__bitvec256 v_checksum256_have;
      uint64_t v_compressed_size;
      uint64_t v_uncompressed_size;
      uint64_t scratch;
    } s_do_transform_io;
    struct {
      uint64_t v_padded_size_have;
      uint64_t v_padded_size_want;
    } s_decode_block_header_with_padding;
    struct {
      uint8_t v_flags;
      uint8_t v_filter_id;
      uint32_t v_shift;
      uint32_t v_f;
      uint64_t scratch;
    } s_decode_block_header_sans_padding;
    struct {
      uint32_t v_shift;
    } s_verify_index;
    struct {
      uint64_t scratch;
    } s_verify_footer;
  } private_data;

#ifdef __cplusplus
#if defined(WUFFS_BASE__HAVE_UNIQUE_PTR)
  using unique_ptr = std::unique_ptr<wuffs_xz__decoder, wuffs_unique_ptr_deleter>;

  // On failure, the alloc_etc functions return nullptr. They don't throw.

  static inline unique_ptr
  alloc() {
    return unique_ptr(wuffs_xz__decoder__alloc());
  }

  static inline wuffs_base__io_transformer::unique_ptr
  alloc_as__wuffs_base__io_transformer() {
    return wuffs_base__io_transformer::unique_ptr(
        wuffs_xz__decoder__alloc_as__wuffs_base__io_transformer());
  }
#endif  // defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

#if defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)
  // Disallow constructing or copying an object via standard C++ mechanisms,
  // e.g. the "new" operator, as this struct is intentionally opaque. Its total
  // size and field layout is not part of the public, stable, memory-safe API.
  // Use malloc or memcpy and the sizeof__wuffs_foo__bar function instead, and
  // call wuffs_foo__bar__baz methods (which all take a "this"-like pointer as
  // their first argument) rather than tweaking bar.private_impl.qux fields.
  //
  // In C, we can just leave wuffs_foo__bar as an incomplete type (unless
  // WUFFS_IMPLEMENTATION is #define'd). In C++, we define a complete type in
  // order to provide convenience methods. These forward on "this", so that you
  // can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)".
  wuffs_xz__decoder__struct() = delete;
  wuffs_xz__decoder__struct(const wuffs_xz__decoder__struct&) = delete;
  wuffs_xz__decoder__struct& operator=(
      const wuffs_xz__decoder__struct&) = delete;
#endif  // defined(WUFFS_BASE__HAVE_EQ_DELETE) && !defined(WUFFS_IMPLEMENTATION)

#if !defined(WUFFS_IMPLEMENTATION)
  // As above, the size of the struct is not part of the public API, and unless
  // WUFFS_IMPLEMENTATION is #define'd, this struct type T should be heap
  // allocated, not stack allocated. Its size is not intended to be known at
  // compile time, but it is unfortunately divulged as a side effect of
  // defining C++ convenience methods. Use "sizeof__T()", calling the function,
  // instead of "sizeof T", invoking the operator. To make the two values
  // different, so that passing the latter will be rejected by the initialize
  // function, we add an arbitrary amount of dead weight.
  uint8_t dead_weight[123000000];  // 123 MB.
#endif  // !defined(WUFFS_IMPLEMENTATION)

  inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
  initialize(
      size_t sizeof_star_self,
      uint64_t wuffs_version,
      uint32_t options) {
    return wuffs_xz__decoder__initialize(
        this, sizeof_star_self, wuffs_version, options);
  }

  inline wuffs_base__io_transformer*
  upcast_as__wuffs_base__io_transformer() {
    return (wuffs_base__io_transformer*)this;
  }

  inline uint64_t
  get_quirk(
      uint32_t a_key) const {
    return wuffs_xz__decoder__get_quirk(this, a_key);
  }

  inline wuffs_base__status
  set_quirk(
      uint32_t a_key,
      uint64_t a_value) {
    return wuffs_xz__decoder__set_quirk(this, a_key, a_value);
  }

  inline wuffs_base__optional_u63
  dst_history_retain_length() const {
    return wuffs_xz__decoder__dst_history_retain_length(this);
  }

  inline wuffs_base__range_ii_u64
  workbuf_len() const {
    return wuffs_xz__decoder__workbuf_len(this);
  }

  inline wuffs_base__status
  transform_io(
      wuffs_base__io_buffer* a_dst,
      wuffs_base__io_buffer* a_src,
      wuffs_base__slice_u8 a_workbuf) {
    return wuffs_xz__decoder__transform_io(this, a_dst, a_src, a_workbuf);
  }

#endif  // __cplusplus
};  // struct wuffs_xz__decoder__struct

#endif  // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION)

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XZ) || defined(WUFFS_NONMONOLITHIC)

#if defined(__cplusplus) && defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

// ---------------- Auxiliary - Base

// Auxiliary code is discussed at
// https://github.com/google/wuffs/blob/main/doc/note/auxiliary-code.md

#include <stdio.h>

#include <string>
#include <utility>

namespace wuffs_aux {

using IOBuffer = wuffs_base__io_buffer;

// MemOwner represents ownership of some memory. Dynamically allocated memory
// (e.g. from malloc or new) is typically paired with free or delete, invoked
// when the std::unique_ptr is destroyed. Statically allocated memory might use
// MemOwner(nullptr, &free), even if that statically allocated memory is not
// nullptr, since calling free(nullptr) is a no-op.
using MemOwner = std::unique_ptr<void, decltype(&free)>;

using QuirkKeyValuePair = std::pair<uint32_t, uint64_t>;

namespace sync_io {

// --------

// DynIOBuffer is an IOBuffer that is backed by a dynamically sized byte array.
// It owns that backing array and will free it in its destructor.
//
// The array size can be explicitly extended (by calling the grow method) but,
// unlike a C++ std::vector, there is no implicit extension (e.g. by calling
// std::vector::insert) and its maximum size is capped by the max_incl
// constructor argument.
//
// It contains an IOBuffer-typed field whose reader side provides access to
// previously written bytes and whose writer side provides access to the
// allocated but not-yet-written-to slack space. For Go programmers, this slack
// space is roughly analogous to the s[len(s):cap(s)] space of a slice s.
class DynIOBuffer {
 public:
  enum GrowResult {
    OK = 0,
    FailedMaxInclExceeded = 1,
    FailedOutOfMemory = 2,
  };

  // m_buf holds the dynamically sized byte array and its read/write indexes:
  //  - m_buf.meta.wi  is roughly analogous to a Go slice's length.
  //  - m_buf.data.len is roughly analogous to a Go slice's capacity. It is
  //    also equal to the m_buf.data.ptr malloc/realloc size.
  //
  // Users should not modify the m_buf.data.ptr or m_buf.data.len fields (as
  // they are conceptually private to this class), but they can modify the
  // bytes referenced by that pointer-length pair (e.g. compactions).
  IOBuffer m_buf;

  // m_max_incl is an inclusive upper bound on the backing array size.
  const uint64_t m_max_incl;

  // Constructor and destructor.
  explicit DynIOBuffer(uint64_t max_incl);
  ~DynIOBuffer();

  // Drop frees the byte array and resets m_buf. The DynIOBuffer can still be
  // used after a drop call. It just restarts from zero.
  void drop();

  // grow ensures that the byte array size is at least min_incl and at most
  // max_incl. It returns FailedMaxInclExceeded if that would require
  // allocating more than max_incl bytes, including the case where (min_incl >
  // max_incl). It returns FailedOutOfMemory if memory allocation failed.
  GrowResult grow(uint64_t min_incl);

 private:
  // Delete the copy and assign constructors.
  DynIOBuffer(const DynIOBuffer&) = delete;
  DynIOBuffer& operator=(const DynIOBuffer&) = delete;

  static uint64_t round_up(uint64_t min_incl, uint64_t max_incl);
};

// --------

class Input {
 public:
  virtual ~Input();

  virtual IOBuffer* BringsItsOwnIOBuffer();
  virtual std::string CopyIn(IOBuffer* dst) = 0;
};

// --------

// FileInput is an Input that reads from a file source.
//
// It does not take responsibility for closing the file when done.
class FileInput : public Input {
 public:
  FileInput(FILE* f);

  virtual std::string CopyIn(IOBuffer* dst);

 private:
  FILE* m_f;

  // Delete the copy and assign constructors.
  FileInput(const FileInput&) = delete;
  FileInput& operator=(const FileInput&) = delete;
};

// --------

// MemoryInput is an Input that reads from an in-memory source.
//
// It does not take responsibility for freeing the memory when done.
class MemoryInput : public Input {
 public:
  MemoryInput(const char* ptr, size_t len);
  MemoryInput(const uint8_t* ptr, size_t len);

  virtual IOBuffer* BringsItsOwnIOBuffer();
  virtual std::string CopyIn(IOBuffer* dst);

 private:
  IOBuffer m_io;

  // Delete the copy and assign constructors.
  MemoryInput(const MemoryInput&) = delete;
  MemoryInput& operator=(const MemoryInput&) = delete;
};

// --------

}  // namespace sync_io

}  // namespace wuffs_aux

// ---------------- Auxiliary - CBOR

namespace wuffs_aux {

struct DecodeCborResult {
  DecodeCborResult(std::string&& error_message0, uint64_t cursor_position0);

  std::string error_message;
  uint64_t cursor_position;
};

class DecodeCborCallbacks {
 public:
  virtual ~DecodeCborCallbacks();

  // AppendXxx are called for leaf nodes: literals, numbers, strings, etc.

  virtual std::string AppendNull() = 0;
  virtual std::string AppendUndefined() = 0;
  virtual std::string AppendBool(bool val) = 0;
  virtual std::string AppendF64(double val) = 0;
  virtual std::string AppendI64(int64_t val) = 0;
  virtual std::string AppendU64(uint64_t val) = 0;
  virtual std::string AppendByteString(std::string&& val) = 0;
  virtual std::string AppendTextString(std::string&& val) = 0;
  virtual std::string AppendMinus1MinusX(uint64_t val) = 0;
  virtual std::string AppendCborSimpleValue(uint8_t val) = 0;
  virtual std::string AppendCborTag(uint64_t val) = 0;

  // Push and Pop are called for container nodes: CBOR arrays (lists) and CBOR
  // maps (dictionaries).
  //
  // The flags bits combine exactly one of:
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__FROM_NONE
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__FROM_LIST
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__FROM_DICT
  // and exactly one of:
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_NONE
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_LIST
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_DICT

  virtual std::string Push(uint32_t flags) = 0;
  virtual std::string Pop(uint32_t flags) = 0;

  // Done is always the last Callback method called by DecodeCbor, whether or
  // not parsing the input as CBOR encountered an error. Even when successful,
  // trailing data may remain in input and buffer.
  //
  // Do not keep a reference to buffer or buffer.data.ptr after Done returns,
  // as DecodeCbor may then de-allocate the backing array.
  //
  // The default Done implementation is a no-op.
  virtual void  //
  Done(DecodeCborResult& result, sync_io::Input& input, IOBuffer& buffer);
};

// The FooArgBar types add structure to Foo's optional arguments. They wrap
// inner representations for several reasons:
//  - It provides a home for the DefaultValue static method, for Foo callers
//    that want to override some but not all optional arguments.
//  - It provides the "Bar" name at Foo call sites, which can help self-
//    document Foo calls with many arguemnts.
//  - It provides some type safety against accidentally transposing or omitting
//    adjacent fundamentally-numeric-typed optional arguments.

// DecodeCborArgQuirks wraps an optional argument to DecodeCbor.
struct DecodeCborArgQuirks {
  explicit DecodeCborArgQuirks(const QuirkKeyValuePair* ptr0,
                               const size_t len0);

  // DefaultValue returns an empty slice.
  static DecodeCborArgQuirks DefaultValue();

  const QuirkKeyValuePair* ptr;
  const size_t len;
};

// DecodeCbor calls callbacks based on the CBOR-formatted data in input.
//
// On success, the returned error_message is empty and cursor_position counts
// the number of bytes consumed. On failure, error_message is non-empty and
// cursor_position is the location of the error. That error may be a content
// error (invalid CBOR) or an input error (e.g. network failure).
DecodeCborResult  //
DecodeCbor(DecodeCborCallbacks& callbacks,
           sync_io::Input& input,
           DecodeCborArgQuirks quirks = DecodeCborArgQuirks::DefaultValue());

}  // namespace wuffs_aux

// ---------------- Auxiliary - Image

namespace wuffs_aux {

struct DecodeImageResult {
  DecodeImageResult(MemOwner&& pixbuf_mem_owner0,
                    wuffs_base__pixel_buffer pixbuf0,
                    std::string&& error_message0);
  DecodeImageResult(std::string&& error_message0);

  MemOwner pixbuf_mem_owner;
  wuffs_base__pixel_buffer pixbuf;
  std::string error_message;
};

// DecodeImageCallbacks are the callbacks given to DecodeImage. They are always
// called in this order:
//  1. SelectDecoder
//  2. HandleMetadata
//  3. SelectPixfmt
//  4. AllocPixbuf
//  5. AllocWorkbuf
//  6. Done
//
// It may return early - the third callback might not be invoked if the second
// one fails - but the final callback (Done) is always invoked.
class DecodeImageCallbacks {
 public:
  // AllocPixbufResult holds a memory allocation (the result of malloc or new,
  // a statically allocated pointer, etc), or an error message. The memory is
  // de-allocated when mem_owner goes out of scope and is destroyed.
  struct AllocPixbufResult {
    AllocPixbufResult(MemOwner&& mem_owner0, wuffs_base__pixel_buffer pixbuf0);
    AllocPixbufResult(std::string&& error_message0);

    MemOwner mem_owner;
    wuffs_base__pixel_buffer pixbuf;
    std::string error_message;
  };

  // AllocWorkbufResult holds a memory allocation (the result of malloc or new,
  // a statically allocated pointer, etc), or an error message. The memory is
  // de-allocated when mem_owner goes out of scope and is destroyed.
  struct AllocWorkbufResult {
    AllocWorkbufResult(MemOwner&& mem_owner0, wuffs_base__slice_u8 workbuf0);
    AllocWorkbufResult(std::string&& error_message0);

    MemOwner mem_owner;
    wuffs_base__slice_u8 workbuf;
    std::string error_message;
  };

  virtual ~DecodeImageCallbacks();

  // SelectDecoder returns the image decoder for the input data's file format.
  // Returning a nullptr means failure (DecodeImage_UnsupportedImageFormat).
  //
  // Common formats will have a FourCC value in the range [1 ..= 0x7FFF_FFFF],
  // such as WUFFS_BASE__FOURCC__JPEG. A zero FourCC value means that Wuffs'
  // standard library did not recognize the image format but if SelectDecoder
  // was overridden, it may examine the input data's starting bytes and still
  // provide its own image decoder, e.g. for an exotic image file format that's
  // not in Wuffs' standard library. The prefix_etc fields have the same
  // meaning as wuffs_base__magic_number_guess_fourcc arguments. SelectDecoder
  // implementations should not modify prefix_data's contents.
  //
  // SelectDecoder might be called more than once, since some image file
  // formats can wrap others. For example, a nominal BMP file can actually
  // contain a JPEG or a PNG.
  //
  // The default SelectDecoder accepts the FOURCC codes listed below. For
  // modular builds (i.e. when #define'ing WUFFS_CONFIG__MODULES), acceptance
  // of the FOO file format is optional (for each value of FOO) and depends on
  // the corresponding module to be enabled at compile time (i.e. #define'ing
  // WUFFS_CONFIG__MODULE__FOO).
  //
  //  - WUFFS_BASE__FOURCC__BMP
  //  - WUFFS_BASE__FOURCC__ETC2
  //  - WUFFS_BASE__FOURCC__GIF
  //  - WUFFS_BASE__FOURCC__JPEG
  //  - WUFFS_BASE__FOURCC__NIE
  //  - WUFFS_BASE__FOURCC__NPBM
  //  - WUFFS_BASE__FOURCC__PNG
  //  - WUFFS_BASE__FOURCC__QOI
  //  - WUFFS_BASE__FOURCC__TARGA
  //  - WUFFS_BASE__FOURCC__TH
  //  - WUFFS_BASE__FOURCC__WBMP
  //  - WUFFS_BASE__FOURCC__WEBP
  //
  // The FOOBAR in WUFFS_BASE__FOURCC__FOBA is limited to four characters, but
  // the FOOBAR in the corresponding WUFFS_CONFIG__MODULE__FOOBAR macro might
  // be fuller and longer. For example, NPBM / NETPBM or TH / THUMBHASH.
  virtual wuffs_base__image_decoder::unique_ptr  //
  SelectDecoder(uint32_t fourcc,
                wuffs_base__slice_u8 prefix_data,
                bool prefix_closed);

  // HandleMetadata acknowledges image metadata. minfo.flavor will be one of:
  //  - WUFFS_BASE__MORE_INFORMATION__FLAVOR__METADATA_RAW_PASSTHROUGH
  //  - WUFFS_BASE__MORE_INFORMATION__FLAVOR__METADATA_PARSED
  // If it is METADATA_RAW_PASSTHROUGH then raw contains the metadata bytes.
  // Those bytes should not be retained beyond the the HandleMetadata call.
  //
  // minfo.metadata__fourcc() will typically match one of the
  // DecodeImageArgFlags bits. For example, if (REPORT_METADATA_CHRM |
  // REPORT_METADATA_GAMA) was passed to DecodeImage then the metadata FourCC
  // will be either WUFFS_BASE__FOURCC__CHRM or WUFFS_BASE__FOURCC__GAMA.
  //
  // It returns an error message, or an empty string on success.
  virtual std::string  //
  HandleMetadata(const wuffs_base__more_information& minfo,
                 wuffs_base__slice_u8 raw);

  // SelectPixfmt returns the destination pixel format for AllocPixbuf. It
  // should return wuffs_base__make_pixel_format(etc) called with one of:
  //  - WUFFS_BASE__PIXEL_FORMAT__Y
  //  - WUFFS_BASE__PIXEL_FORMAT__BGR_565
  //  - WUFFS_BASE__PIXEL_FORMAT__BGR
  //  - WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL
  //  - WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE
  //  - WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL
  //  - WUFFS_BASE__PIXEL_FORMAT__RGB
  //  - WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL
  //  - WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL
  // or return image_config.pixcfg.pixel_format(). The latter means to use the
  // image file's natural pixel format. For example, GIF images' natural pixel
  // format is an indexed one.
  //
  // Returning otherwise means failure (DecodeImage_UnsupportedPixelFormat).
  //
  // The default SelectPixfmt implementation returns
  // wuffs_base__make_pixel_format(WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL) which
  // is 4 bytes per pixel (8 bits per channel × 4 channels).
  virtual wuffs_base__pixel_format  //
  SelectPixfmt(const wuffs_base__image_config& image_config);

  // AllocPixbuf allocates the pixel buffer.
  //
  // allow_uninitialized_memory will be true if a valid background_color was
  // passed to DecodeImage, since the pixel buffer's contents will be
  // overwritten with that color after AllocPixbuf returns.
  //
  // The default AllocPixbuf implementation allocates either uninitialized or
  // zeroed memory. Zeroed memory typically corresponds to filling with opaque
  // black or transparent black, depending on the pixel format.
  virtual AllocPixbufResult  //
  AllocPixbuf(const wuffs_base__image_config& image_config,
              bool allow_uninitialized_memory);

  // AllocWorkbuf allocates the work buffer. The allocated buffer's length
  // should be at least len_range.min_incl, but larger allocations (up to
  // len_range.max_incl) may have better performance (by using more memory).
  //
  // The default AllocWorkbuf implementation allocates len_range.max_incl bytes
  // of either uninitialized or zeroed memory.
  virtual AllocWorkbufResult  //
  AllocWorkbuf(wuffs_base__range_ii_u64 len_range,
               bool allow_uninitialized_memory);

  // Done is always the last Callback method called by DecodeImage, whether or
  // not parsing the input encountered an error. Even when successful, trailing
  // data may remain in input and buffer.
  //
  // The image_decoder is the one returned by SelectDecoder (if SelectDecoder
  // was successful), or a no-op unique_ptr otherwise. Like any unique_ptr,
  // ownership moves to the Done implementation.
  //
  // Do not keep a reference to buffer or buffer.data.ptr after Done returns,
  // as DecodeImage may then de-allocate the backing array.
  //
  // The default Done implementation is a no-op, other than running the
  // image_decoder unique_ptr destructor.
  virtual void  //
  Done(DecodeImageResult& result,
       sync_io::Input& input,
       IOBuffer& buffer,
       wuffs_base__image_decoder::unique_ptr image_decoder);
};

extern const char DecodeImage_BufferIsTooShort[];
extern const char DecodeImage_MaxInclDimensionExceeded[];
extern const char DecodeImage_MaxInclMetadataLengthExceeded[];
extern const char DecodeImage_OutOfMemory[];
extern const char DecodeImage_UnexpectedEndOfFile[];
extern const char DecodeImage_UnsupportedImageFormat[];
extern const char DecodeImage_UnsupportedMetadata[];
extern const char DecodeImage_UnsupportedPixelBlend[];
extern const char DecodeImage_UnsupportedPixelConfiguration[];
extern const char DecodeImage_UnsupportedPixelFormat[];

// The FooArgBar types add structure to Foo's optional arguments. They wrap
// inner representations for several reasons:
//  - It provides a home for the DefaultValue static method, for Foo callers
//    that want to override some but not all optional arguments.
//  - It provides the "Bar" name at Foo call sites, which can help self-
//    document Foo calls with many arguemnts.
//  - It provides some type safety against accidentally transposing or omitting
//    adjacent fundamentally-numeric-typed optional arguments.

// DecodeImageArgQuirks wraps an optional argument to DecodeImage.
struct DecodeImageArgQuirks {
  explicit DecodeImageArgQuirks(const QuirkKeyValuePair* ptr0,
                                const size_t len0);

  // DefaultValue returns an empty slice.
  static DecodeImageArgQuirks DefaultValue();

  const QuirkKeyValuePair* ptr;
  const size_t len;
};

// DecodeImageArgFlags wraps an optional argument to DecodeImage.
struct DecodeImageArgFlags {
  explicit DecodeImageArgFlags(uint64_t repr0);

  // DefaultValue returns 0.
  static DecodeImageArgFlags DefaultValue();

  // TODO: support all of the REPORT_METADATA_FOO flags, not just CHRM, EXIF,
  // GAMA, ICCP, KVP, SRGB and XMP.

  // Background Color.
  static constexpr uint64_t REPORT_METADATA_BGCL = 0x0001;
  // Primary Chromaticities and White Point.
  static constexpr uint64_t REPORT_METADATA_CHRM = 0x0002;
  // Exchangeable Image File Format.
  static constexpr uint64_t REPORT_METADATA_EXIF = 0x0004;
  // Gamma Correction.
  static constexpr uint64_t REPORT_METADATA_GAMA = 0x0008;
  // International Color Consortium Profile.
  static constexpr uint64_t REPORT_METADATA_ICCP = 0x0010;
  // Key-Value Pair.
  //
  // For PNG files, this includes iTXt, tEXt and zTXt chunks. In the
  // HandleMetadata callback, the raw argument contains UTF-8 strings.
  static constexpr uint64_t REPORT_METADATA_KVP = 0x0020;
  // Modification Time.
  static constexpr uint64_t REPORT_METADATA_MTIM = 0x0040;
  // Offset (2-Dimensional).
  static constexpr uint64_t REPORT_METADATA_OFS2 = 0x0080;
  // Physical Dimensions.
  static constexpr uint64_t REPORT_METADATA_PHYD = 0x0100;
  // Standard Red Green Blue (Rendering Intent).
  static constexpr uint64_t REPORT_METADATA_SRGB = 0x0200;
  // Extensible Metadata Platform.
  static constexpr uint64_t REPORT_METADATA_XMP = 0x0400;

  uint64_t repr;
};

// DecodeImageArgPixelBlend wraps an optional argument to DecodeImage.
struct DecodeImageArgPixelBlend {
  explicit DecodeImageArgPixelBlend(wuffs_base__pixel_blend repr0);

  // DefaultValue returns WUFFS_BASE__PIXEL_BLEND__SRC.
  static DecodeImageArgPixelBlend DefaultValue();

  wuffs_base__pixel_blend repr;
};

// DecodeImageArgBackgroundColor wraps an optional argument to DecodeImage.
struct DecodeImageArgBackgroundColor {
  explicit DecodeImageArgBackgroundColor(
      wuffs_base__color_u32_argb_premul repr0);

  // DefaultValue returns 1, an invalid wuffs_base__color_u32_argb_premul.
  static DecodeImageArgBackgroundColor DefaultValue();

  wuffs_base__color_u32_argb_premul repr;
};

// DecodeImageArgMaxInclDimension wraps an optional argument to DecodeImage.
struct DecodeImageArgMaxInclDimension {
  explicit DecodeImageArgMaxInclDimension(uint32_t repr0);

  // DefaultValue returns 1048575 = 0x000F_FFFF, more than 1 million pixels.
  static DecodeImageArgMaxInclDimension DefaultValue();

  uint32_t repr;
};

// DecodeImageArgMaxInclMetadataLength wraps an optional argument to
// DecodeImage.
struct DecodeImageArgMaxInclMetadataLength {
  explicit DecodeImageArgMaxInclMetadataLength(uint64_t repr0);

  // DefaultValue returns 16777215 = 0x00FF_FFFF, one less than 16 MiB.
  static DecodeImageArgMaxInclMetadataLength DefaultValue();

  uint64_t repr;
};

// DecodeImage decodes the image data in input. A variety of image file formats
// can be decoded, depending on what callbacks.SelectDecoder returns.
//
// For animated formats, only the first frame is returned, since the API is
// simpler for synchronous I/O and having DecodeImage only return when
// completely done, but rendering animation often involves handling other
// events in between animation frames. To decode multiple frames of animated
// images, or for asynchronous I/O (e.g. when decoding an image streamed over
// the network), use Wuffs' lower level C API instead of its higher level,
// simplified C++ API (the wuffs_aux API).
//
// The DecodeImageResult's fields depend on whether decoding succeeded:
//  - On total success, the error_message is empty and pixbuf.pixcfg.is_valid()
//    is true.
//  - On partial success (e.g. the input file was truncated but we are still
//    able to decode some of the pixels), error_message is non-empty but
//    pixbuf.pixcfg.is_valid() is still true. It is up to the caller whether to
//    accept or reject partial success.
//  - On failure, the error_message is non_empty and pixbuf.pixcfg.is_valid()
//    is false.
//
// The callbacks allocate the pixel buffer memory and work buffer memory. On
// success, pixel buffer memory ownership is passed to the DecodeImage caller
// as the returned pixbuf_mem_owner. Regardless of success or failure, the work
// buffer memory is deleted.
//
// The pixel_blend (one of the constants listed below) determines how to
// composite the decoded image over the pixel buffer's original pixels (as
// returned by callbacks.AllocPixbuf):
//  - WUFFS_BASE__PIXEL_BLEND__SRC
//  - WUFFS_BASE__PIXEL_BLEND__SRC_OVER
//
// The background_color is used to fill the pixel buffer after
// callbacks.AllocPixbuf returns, if it is valid in the
// wuffs_base__color_u32_argb_premul__is_valid sense. The default value,
// 0x0000_0001, is not valid since its Blue channel value (0x01) is greater
// than its Alpha channel value (0x00). A valid background_color will typically
// be overwritten when pixel_blend is WUFFS_BASE__PIXEL_BLEND__SRC, but might
// still be visible on partial (not total) success or when pixel_blend is
// WUFFS_BASE__PIXEL_BLEND__SRC_OVER and the decoded image is not fully opaque.
//
// Decoding fails (with DecodeImage_MaxInclDimensionExceeded) if the image's
// width or height is greater than max_incl_dimension or if any opted-in (via
// flags bits) metadata is longer than max_incl_metadata_length.
DecodeImageResult  //
DecodeImage(DecodeImageCallbacks& callbacks,
            sync_io::Input& input,
            DecodeImageArgQuirks quirks = DecodeImageArgQuirks::DefaultValue(),
            DecodeImageArgFlags flags = DecodeImageArgFlags::DefaultValue(),
            DecodeImageArgPixelBlend pixel_blend =
                DecodeImageArgPixelBlend::DefaultValue(),
            DecodeImageArgBackgroundColor background_color =
                DecodeImageArgBackgroundColor::DefaultValue(),
            DecodeImageArgMaxInclDimension max_incl_dimension =
                DecodeImageArgMaxInclDimension::DefaultValue(),
            DecodeImageArgMaxInclMetadataLength max_incl_metadata_length =
                DecodeImageArgMaxInclMetadataLength::DefaultValue());

}  // namespace wuffs_aux

// ---------------- Auxiliary - JSON

namespace wuffs_aux {

struct DecodeJsonResult {
  DecodeJsonResult(std::string&& error_message0, uint64_t cursor_position0);

  std::string error_message;
  uint64_t cursor_position;
};

class DecodeJsonCallbacks {
 public:
  virtual ~DecodeJsonCallbacks();

  // AppendXxx are called for leaf nodes: literals, numbers and strings. For
  // strings, the Callbacks implementation is responsible for tracking map keys
  // versus other values.

  virtual std::string AppendNull() = 0;
  virtual std::string AppendBool(bool val) = 0;
  virtual std::string AppendF64(double val) = 0;
  virtual std::string AppendI64(int64_t val) = 0;
  virtual std::string AppendTextString(std::string&& val) = 0;

  // Push and Pop are called for container nodes: JSON arrays (lists) and JSON
  // objects (dictionaries).
  //
  // The flags bits combine exactly one of:
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__FROM_NONE
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__FROM_LIST
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__FROM_DICT
  // and exactly one of:
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_NONE
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_LIST
  //  - WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_DICT

  virtual std::string Push(uint32_t flags) = 0;
  virtual std::string Pop(uint32_t flags) = 0;

  // Done is always the last Callback method called by DecodeJson, whether or
  // not parsing the input as JSON encountered an error. Even when successful,
  // trailing data may remain in input and buffer. See "Unintuitive JSON
  // Parsing" (https://nullprogram.com/blog/2019/12/28/) which discusses JSON
  // parsing and when it stops.
  //
  // Do not keep a reference to buffer or buffer.data.ptr after Done returns,
  // as DecodeJson may then de-allocate the backing array.
  //
  // The default Done implementation is a no-op.
  virtual void  //
  Done(DecodeJsonResult& result, sync_io::Input& input, IOBuffer& buffer);
};

extern const char DecodeJson_BadJsonPointer[];
extern const char DecodeJson_NoMatch[];

// The FooArgBar types add structure to Foo's optional arguments. They wrap
// inner representations for several reasons:
//  - It provides a home for the DefaultValue static method, for Foo callers
//    that want to override some but not all optional arguments.
//  - It provides the "Bar" name at Foo call sites, which can help self-
//    document Foo calls with many arguemnts.
//  - It provides some type safety against accidentally transposing or omitting
//    adjacent fundamentally-numeric-typed optional arguments.

// DecodeJsonArgQuirks wraps an optional argument to DecodeJson.
struct DecodeJsonArgQuirks {
  explicit DecodeJsonArgQuirks(const QuirkKeyValuePair* ptr0,
                               const size_t len0);

  // DefaultValue returns an empty slice.
  static DecodeJsonArgQuirks DefaultValue();

  const QuirkKeyValuePair* ptr;
  const size_t len;
};

// DecodeJsonArgJsonPointer wraps an optional argument to DecodeJson.
struct DecodeJsonArgJsonPointer {
  explicit DecodeJsonArgJsonPointer(std::string repr0);

  // DefaultValue returns an empty string.
  static DecodeJsonArgJsonPointer DefaultValue();

  std::string repr;
};

// DecodeJson calls callbacks based on the JSON-formatted data in input.
//
// On success, the returned error_message is empty and cursor_position counts
// the number of bytes consumed. On failure, error_message is non-empty and
// cursor_position is the location of the error. That error may be a content
// error (invalid JSON) or an input error (e.g. network failure).
//
// json_pointer is a query in the JSON Pointer (RFC 6901) syntax. The callbacks
// run for the input's sub-node that matches the query. DecodeJson_NoMatch is
// returned if no matching sub-node was found. The empty query matches the
// input's root node, consistent with JSON Pointer semantics.
//
// The JSON Pointer implementation is greedy: duplicate keys are not rejected
// but only the first match for each '/'-separated fragment is followed.
DecodeJsonResult  //
DecodeJson(DecodeJsonCallbacks& callbacks,
           sync_io::Input& input,
           DecodeJsonArgQuirks quirks = DecodeJsonArgQuirks::DefaultValue(),
           DecodeJsonArgJsonPointer json_pointer =
               DecodeJsonArgJsonPointer::DefaultValue());

}  // namespace wuffs_aux

#endif  // defined(__cplusplus) && defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

// ---------------- Wuffs' reimplementation of the STB API.
//
// This is a drop-in replacement of that third-party library.
//
// Disabled by default, unless you #define the
// WUFFS_CONFIG__ENABLE_DROP_IN_REPLACEMENT__STB macro beforehand.
//
// For API docs, see https://github.com/nothings/stb

#if defined(WUFFS_CONFIG__ENABLE_DROP_IN_REPLACEMENT__STB)

#ifdef __cplusplus
extern "C" {
#endif

#if defined(WUFFS_CONFIG__STATIC_FUNCTIONS) || defined(STB_IMAGE_STATIC)
#define WUFFS_DROP_IN__STB__MAYBE_STATIC static
#else
#define WUFFS_DROP_IN__STB__MAYBE_STATIC
#endif

enum {
  STBI_default = 0,
  STBI_grey = 1,
  STBI_grey_alpha = 2,
  STBI_rgb = 3,
  STBI_rgb_alpha = 4
};

typedef unsigned char stbi_uc;
typedef unsigned short stbi_us;

typedef struct {
  int (*read)(void* user, char* data, int size);
  void (*skip)(void* user, int n);
  int (*eof)(void* user);
} stbi_io_callbacks;

// --------

WUFFS_DROP_IN__STB__MAYBE_STATIC int  //
stbi_info_from_memory(                //
    stbi_uc const* buffer,            //
    int len,                          //
    int* x,                           //
    int* y,                           //
    int* comp);

WUFFS_DROP_IN__STB__MAYBE_STATIC stbi_uc*  //
stbi_load_from_memory(                     //
    stbi_uc const* buffer,                 //
    int len,                               //
    int* x,                                //
    int* y,                                //
    int* channels_in_file,                 //
    int desired_channels);

WUFFS_DROP_IN__STB__MAYBE_STATIC int  //
stbi_info_from_callbacks(             //
    stbi_io_callbacks const* clbk,    //
    void* user,                       //
    int* x,                           //
    int* y,                           //
    int* comp);

WUFFS_DROP_IN__STB__MAYBE_STATIC stbi_uc*  //
stbi_load_from_callbacks(                  //
    stbi_io_callbacks const* clbk,         //
    void* user,                            //
    int* x,                                //
    int* y,                                //
    int* channels_in_file,                 //
    int desired_channels);

// --------

#if !defined(STBI_NO_STDIO)

WUFFS_DROP_IN__STB__MAYBE_STATIC int  //
stbi_info(                            //
    char const* filename,             //
    int* x,                           //
    int* y,                           //
    int* comp);

WUFFS_DROP_IN__STB__MAYBE_STATIC stbi_uc*  //
stbi_load(                                 //
    char const* filename,                  //
    int* x,                                //
    int* y,                                //
    int* channels_in_file,                 //
    int desired_channels);

WUFFS_DROP_IN__STB__MAYBE_STATIC int  //
stbi_info_from_file(                  //
    FILE* f,                          //
    int* x,                           //
    int* y,                           //
    int* comp);

WUFFS_DROP_IN__STB__MAYBE_STATIC stbi_uc*  //
stbi_load_from_file(                       //
    FILE* f,                               //
    int* x,                                //
    int* y,                                //
    int* channels_in_file,                 //
    int desired_channels);

#endif  // !defined(STBI_NO_STDIO)

// --------

WUFFS_DROP_IN__STB__MAYBE_STATIC void  //
stbi_image_free(                       //
    void* retval_from_stbi_load);

WUFFS_DROP_IN__STB__MAYBE_STATIC const char*  //
stbi_failure_reason(void);

#ifdef __cplusplus
}
#endif

#endif  // defined (WUFFS_CONFIG__ENABLE_DROP_IN_REPLACEMENT__STB)

// ‼ WUFFS C HEADER ENDS HERE.
#ifdef WUFFS_IMPLEMENTATION

#ifdef __cplusplus
extern "C" {
#endif

// ---------------- Fundamentals

// WUFFS_BASE__MAGIC is a magic number to check that initializers are called.
// It's not foolproof, given C doesn't automatically zero memory before use,
// but it should catch 99.99% of cases.
//
// Its (non-zero) value is arbitrary, based on md5sum("wuffs").
#define WUFFS_BASE__MAGIC ((uint32_t)0x3CCB6C71)

// WUFFS_BASE__DISABLED is a magic number to indicate that a non-recoverable
// error was previously encountered.
//
// Its (non-zero) value is arbitrary, based on md5sum("disabled").
#define WUFFS_BASE__DISABLED ((uint32_t)0x075AE3D2)

// Use switch cases for coroutine suspension points, similar to the technique
// in https://www.chiark.greenend.org.uk/~sgtatham/coroutines.html
//
// The implicit fallthrough is intentional.
//
// We use trivial macros instead of an explicit assignment and case statement
// so that clang-format doesn't get confused by the unusual "case"s.
#define WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0 case 0:;
#define WUFFS_BASE__COROUTINE_SUSPENSION_POINT(n) \
  coro_susp_point = n;                            \
  case n:;

#define WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(n) \
  if (!status.repr) {                                           \
    goto ok;                                                    \
  } else if (*status.repr != '$') {                             \
    goto exit;                                                  \
  }                                                             \
  coro_susp_point = n;                                          \
  goto suspend;                                                 \
  case n:;

// The "defined(__clang__)" isn't redundant. While vanilla clang defines
// __GNUC__, clang-cl (which mimics MSVC's cl.exe) does not.
#if defined(__GNUC__) || defined(__clang__)
#define WUFFS_BASE__LIKELY(expr) (__builtin_expect(!!(expr), 1))
#define WUFFS_BASE__UNLIKELY(expr) (__builtin_expect(!!(expr), 0))
#else
#define WUFFS_BASE__LIKELY(expr) (expr)
#define WUFFS_BASE__UNLIKELY(expr) (expr)
#endif

// --------

static inline wuffs_base__empty_struct  //
wuffs_private_impl__ignore_status(wuffs_base__status z) {
  return wuffs_base__make_empty_struct();
}

static inline wuffs_base__status  //
wuffs_private_impl__status__ensure_not_a_suspension(wuffs_base__status z) {
  if (z.repr && (*z.repr == '$')) {
    z.repr = wuffs_base__error__cannot_return_a_suspension;
  }
  return z;
}

// --------

// wuffs_private_impl__iterate_total_advance returns the exclusive
// pointer-offset at which iteration should stop. The overall slice has length
// total_len, each iteration's sub-slice has length iter_len and are placed
// iter_advance apart.
//
// The iter_advance may not be larger than iter_len. The iter_advance may be
// smaller than iter_len, in which case the sub-slices will overlap.
//
// The return value r satisfies ((0 <= r) && (r <= total_len)).
//
// For example, if total_len = 15, iter_len = 5 and iter_advance = 3, there are
// four iterations at offsets 0, 3, 6 and 9. This function returns 12.
//
// 0123456789012345
// [....]
//    [....]
//       [....]
//          [....]
//             $
// 0123456789012345
//
// For example, if total_len = 15, iter_len = 5 and iter_advance = 5, there are
// three iterations at offsets 0, 5 and 10. This function returns 15.
//
// 0123456789012345
// [....]
//      [....]
//           [....]
//                $
// 0123456789012345
static inline size_t  //
wuffs_private_impl__iterate_total_advance(size_t total_len,
                                          size_t iter_len,
                                          size_t iter_advance) {
  if (total_len >= iter_len) {
    size_t n = total_len - iter_len;
    return ((n / iter_advance) * iter_advance) + iter_advance;
  }
  return 0;
}

// ---------------- Numeric Types

extern const uint8_t wuffs_private_impl__low_bits_mask__u8[8];
extern const uint16_t wuffs_private_impl__low_bits_mask__u16[16];
extern const uint32_t wuffs_private_impl__low_bits_mask__u32[32];
extern const uint64_t wuffs_private_impl__low_bits_mask__u64[64];

#define WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U8(n) \
  (wuffs_private_impl__low_bits_mask__u8[n])
#define WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U16(n) \
  (wuffs_private_impl__low_bits_mask__u16[n])
#define WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32(n) \
  (wuffs_private_impl__low_bits_mask__u32[n])
#define WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U64(n) \
  (wuffs_private_impl__low_bits_mask__u64[n])

// --------

static inline void  //
wuffs_private_impl__u8__sat_add_indirect(uint8_t* x, uint8_t y) {
  *x = wuffs_base__u8__sat_add(*x, y);
}

static inline void  //
wuffs_private_impl__u8__sat_sub_indirect(uint8_t* x, uint8_t y) {
  *x = wuffs_base__u8__sat_sub(*x, y);
}

static inline void  //
wuffs_private_impl__u16__sat_add_indirect(uint16_t* x, uint16_t y) {
  *x = wuffs_base__u16__sat_add(*x, y);
}

static inline void  //
wuffs_private_impl__u16__sat_sub_indirect(uint16_t* x, uint16_t y) {
  *x = wuffs_base__u16__sat_sub(*x, y);
}

static inline void  //
wuffs_private_impl__u32__sat_add_indirect(uint32_t* x, uint32_t y) {
  *x = wuffs_base__u32__sat_add(*x, y);
}

static inline void  //
wuffs_private_impl__u32__sat_sub_indirect(uint32_t* x, uint32_t y) {
  *x = wuffs_base__u32__sat_sub(*x, y);
}

static inline void  //
wuffs_private_impl__u64__sat_add_indirect(uint64_t* x, uint64_t y) {
  *x = wuffs_base__u64__sat_add(*x, y);
}

static inline void  //
wuffs_private_impl__u64__sat_sub_indirect(uint64_t* x, uint64_t y) {
  *x = wuffs_base__u64__sat_sub(*x, y);
}

// ---------------- Numeric Types (Utility)

#define wuffs_base__utility__i64_divide(a, b) \
  ((uint64_t)(((int64_t)(a)) / ((int64_t)(b))))

#define wuffs_base__utility__sign_extend_convert_u8_u32(a) \
  ((uint32_t)(int32_t)(int8_t)(a))

#define wuffs_base__utility__sign_extend_convert_u8_u64(a) \
  ((uint64_t)(int64_t)(int8_t)(a))

#define wuffs_base__utility__sign_extend_convert_u16_u32(a) \
  ((uint32_t)(int32_t)(int16_t)(a))

#define wuffs_base__utility__sign_extend_convert_u16_u64(a) \
  ((uint64_t)(int64_t)(int16_t)(a))

#define wuffs_base__utility__sign_extend_convert_u32_u64(a) \
  ((uint64_t)(int64_t)(int32_t)(a))

#define wuffs_base__utility__sign_extend_rshift_u32(a, n) \
  ((uint32_t)(((int32_t)(a)) >> (n)))

#define wuffs_base__utility__sign_extend_rshift_u64(a, n) \
  ((uint64_t)(((int64_t)(a)) >> (n)))

#define wuffs_base__utility__make_bitvec256(e00, e01, e02, e03) \
  wuffs_base__make_bitvec256(e00, e01, e02, e03)

#define wuffs_base__utility__make_optional_u63(h, v) \
  wuffs_base__make_optional_u63(h, v)

// ---------------- Slices and Tables

// This function basically returns (ptr + len), except that that expression is
// Undefined Behavior in C (but not C++) when ptr is NULL, even if len is zero.
//
// Precondition: (ptr != NULL) || (len == 0).
static inline const uint8_t*  //
wuffs_private_impl__ptr_u8_plus_len(const uint8_t* ptr, size_t len) {
  return ptr ? (ptr + len) : NULL;
}

// --------

// wuffs_private_impl__slice_u8__prefix returns up to the first up_to bytes of
// s.
static inline wuffs_base__slice_u8  //
wuffs_private_impl__slice_u8__prefix(wuffs_base__slice_u8 s, uint64_t up_to) {
  if (((uint64_t)(s.len)) > up_to) {
    s.len = ((size_t)up_to);
  }
  return s;
}

// wuffs_private_impl__slice_u8__suffix returns up to the last up_to bytes of
// s.
static inline wuffs_base__slice_u8  //
wuffs_private_impl__slice_u8__suffix(wuffs_base__slice_u8 s, uint64_t up_to) {
  if (((uint64_t)(s.len)) > up_to) {
    s.ptr += ((uint64_t)(s.len)) - up_to;
    s.len = ((size_t)up_to);
  }
  return s;
}

// wuffs_private_impl__slice_u8__copy_from_slice calls memmove(dst.ptr,
// src.ptr, len) where len is the minimum of dst.len and src.len.
//
// Passing a wuffs_base__slice_u8 with all fields NULL or zero (a valid, empty
// slice) is valid and results in a no-op.
static inline uint64_t  //
wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__slice_u8 dst,
                                              wuffs_base__slice_u8 src) {
  size_t len = dst.len < src.len ? dst.len : src.len;
  if (len > 0) {
    memmove(dst.ptr, src.ptr, len);
  }
  return len;
}

static inline wuffs_base__empty_struct  //
wuffs_private_impl__bulk_load_host_endian(void* ptr,
                                          size_t len,
                                          wuffs_base__slice_u8 src) {
  if (len && (len <= src.len)) {
    memmove(ptr, src.ptr, len);
  }
  return wuffs_base__make_empty_struct();
}

static inline wuffs_base__empty_struct  //
wuffs_private_impl__bulk_memset(void* ptr, size_t len, uint8_t byte_value) {
  if (len) {
    memset(ptr, byte_value, len);
  }
  return wuffs_base__make_empty_struct();
}

static inline wuffs_base__empty_struct  //
wuffs_private_impl__bulk_save_host_endian(void* ptr,
                                          size_t len,
                                          wuffs_base__slice_u8 dst) {
  if (len && (len <= dst.len)) {
    memmove(dst.ptr, ptr, len);
  }
  return wuffs_base__make_empty_struct();
}

// --------

static inline wuffs_base__slice_u8  //
wuffs_private_impl__table_u8__row_u32(wuffs_base__table_u8 t, uint32_t y) {
  if (t.ptr && (y < t.height)) {
    return wuffs_base__make_slice_u8(t.ptr + (t.stride * y), t.width);
  }
  return wuffs_base__empty_slice_u8();
}

// ---------------- Slices and Tables (Utility)

#define wuffs_base__utility__empty_slice_u8 wuffs_base__empty_slice_u8

// ---------------- Ranges and Rects

static inline uint32_t  //
wuffs_private_impl__range_ii_u32__get_min_incl(
    const wuffs_base__range_ii_u32* r) {
  return r->min_incl;
}

static inline uint32_t  //
wuffs_private_impl__range_ii_u32__get_max_incl(
    const wuffs_base__range_ii_u32* r) {
  return r->max_incl;
}

static inline uint32_t  //
wuffs_private_impl__range_ie_u32__get_min_incl(
    const wuffs_base__range_ie_u32* r) {
  return r->min_incl;
}

static inline uint32_t  //
wuffs_private_impl__range_ie_u32__get_max_excl(
    const wuffs_base__range_ie_u32* r) {
  return r->max_excl;
}

static inline uint64_t  //
wuffs_private_impl__range_ii_u64__get_min_incl(
    const wuffs_base__range_ii_u64* r) {
  return r->min_incl;
}

static inline uint64_t  //
wuffs_private_impl__range_ii_u64__get_max_incl(
    const wuffs_base__range_ii_u64* r) {
  return r->max_incl;
}

static inline uint64_t  //
wuffs_private_impl__range_ie_u64__get_min_incl(
    const wuffs_base__range_ie_u64* r) {
  return r->min_incl;
}

static inline uint64_t  //
wuffs_private_impl__range_ie_u64__get_max_excl(
    const wuffs_base__range_ie_u64* r) {
  return r->max_excl;
}

// ---------------- Ranges and Rects (Utility)

#define wuffs_base__utility__empty_range_ii_u32 wuffs_base__empty_range_ii_u32
#define wuffs_base__utility__empty_range_ie_u32 wuffs_base__empty_range_ie_u32
#define wuffs_base__utility__empty_range_ii_u64 wuffs_base__empty_range_ii_u64
#define wuffs_base__utility__empty_range_ie_u64 wuffs_base__empty_range_ie_u64
#define wuffs_base__utility__empty_rect_ii_u32 wuffs_base__empty_rect_ii_u32
#define wuffs_base__utility__empty_rect_ie_u32 wuffs_base__empty_rect_ie_u32
#define wuffs_base__utility__make_range_ii_u32 wuffs_base__make_range_ii_u32
#define wuffs_base__utility__make_range_ie_u32 wuffs_base__make_range_ie_u32
#define wuffs_base__utility__make_range_ii_u64 wuffs_base__make_range_ii_u64
#define wuffs_base__utility__make_range_ie_u64 wuffs_base__make_range_ie_u64
#define wuffs_base__utility__make_rect_ii_u32 wuffs_base__make_rect_ii_u32
#define wuffs_base__utility__make_rect_ie_u32 wuffs_base__make_rect_ie_u32

// ---------------- I/O

static inline uint64_t  //
wuffs_private_impl__io__count_since(uint64_t mark, uint64_t index) {
  if (index >= mark) {
    return index - mark;
  }
  return 0;
}

// TODO: drop the "const" in "const uint8_t* ptr". Some though required about
// the base.io_reader.since method returning a mutable "slice base.u8".
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-qual"
#endif
static inline wuffs_base__slice_u8  //
wuffs_private_impl__io__since(uint64_t mark,
                              uint64_t index,
                              const uint8_t* ptr) {
  if (index >= mark) {
    return wuffs_base__make_slice_u8(((uint8_t*)ptr) + mark,
                                     ((size_t)(index - mark)));
  }
  return wuffs_base__empty_slice_u8();
}
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif

// --------

static inline void  //
wuffs_private_impl__io_reader__limit(const uint8_t** ptr_io2_r,
                                     const uint8_t* iop_r,
                                     uint64_t limit) {
  if (((uint64_t)(*ptr_io2_r - iop_r)) > limit) {
    *ptr_io2_r = iop_r + limit;
  }
}

static inline uint32_t  //
wuffs_private_impl__io_reader__limited_copy_u32_to_slice(
    const uint8_t** ptr_iop_r,
    const uint8_t* io2_r,
    uint32_t length,
    wuffs_base__slice_u8 dst) {
  const uint8_t* iop_r = *ptr_iop_r;
  size_t n = dst.len;
  if (n > length) {
    n = length;
  }
  if (n > ((size_t)(io2_r - iop_r))) {
    n = (size_t)(io2_r - iop_r);
  }
  if (n > 0) {
    memmove(dst.ptr, iop_r, n);
    *ptr_iop_r += n;
  }
  return (uint32_t)(n);
}

// wuffs_private_impl__io_reader__match7 returns whether the io_reader's
// upcoming bytes start with the given prefix (up to 7 bytes long). It is
// peek-like, not read-like, in that there are no side-effects.
//
// The low 3 bits of a hold the prefix length, n.
//
// The high 56 bits of a hold the prefix itself, in little-endian order. The
// first prefix byte is in bits 8..=15, the second prefix byte is in bits
// 16..=23, etc. The high (8 * (7 - n)) bits are ignored.
//
// There are three possible return values:
//  - 0 means success.
//  - 1 means inconclusive, equivalent to "$short read".
//  - 2 means failure.
static inline uint32_t  //
wuffs_private_impl__io_reader__match7(const uint8_t* iop_r,
                                      const uint8_t* io2_r,
                                      wuffs_base__io_buffer* r,
                                      uint64_t a) {
  uint32_t n = a & 7;
  a >>= 8;
  if ((io2_r - iop_r) >= 8) {
    uint64_t x = wuffs_base__peek_u64le__no_bounds_check(iop_r);
    uint32_t shift = 8 * (8 - n);
    return ((a << shift) == (x << shift)) ? 0 : 2;
  }
  for (; n > 0; n--) {
    if (iop_r >= io2_r) {
      return (r && r->meta.closed) ? 2 : 1;
    } else if (*iop_r != ((uint8_t)(a))) {
      return 2;
    }
    iop_r++;
    a >>= 8;
  }
  return 0;
}

static inline wuffs_base__io_buffer*  //
wuffs_private_impl__io_reader__set(wuffs_base__io_buffer* b,
                                   const uint8_t** ptr_iop_r,
                                   const uint8_t** ptr_io0_r,
                                   const uint8_t** ptr_io1_r,
                                   const uint8_t** ptr_io2_r,
                                   wuffs_base__slice_u8 data,
                                   uint64_t history_position) {
  b->data = data;
  b->meta.wi = data.len;
  b->meta.ri = 0;
  b->meta.pos = history_position;
  b->meta.closed = false;

  *ptr_iop_r = data.ptr;
  *ptr_io0_r = data.ptr;
  *ptr_io1_r = data.ptr;
  *ptr_io2_r = data.ptr + data.len;

  return b;
}

// --------

static inline uint64_t  //
wuffs_private_impl__io_writer__copy_from_slice(uint8_t** ptr_iop_w,
                                               uint8_t* io2_w,
                                               wuffs_base__slice_u8 src) {
  uint8_t* iop_w = *ptr_iop_w;
  size_t n = src.len;
  if (n > ((size_t)(io2_w - iop_w))) {
    n = (size_t)(io2_w - iop_w);
  }
  if (n > 0) {
    memmove(iop_w, src.ptr, n);
    *ptr_iop_w += n;
  }
  return (uint64_t)(n);
}

static inline void  //
wuffs_private_impl__io_writer__limit(uint8_t** ptr_io2_w,
                                     uint8_t* iop_w,
                                     uint64_t limit) {
  if (((uint64_t)(*ptr_io2_w - iop_w)) > limit) {
    *ptr_io2_w = iop_w + limit;
  }
}

static inline uint32_t  //
wuffs_private_impl__io_writer__limited_copy_u32_from_history(
    uint8_t** ptr_iop_w,
    uint8_t* io0_w,
    uint8_t* io2_w,
    uint32_t length,
    uint32_t distance) {
  if (!distance) {
    return 0;
  }
  uint8_t* p = *ptr_iop_w;
  if ((size_t)(p - io0_w) < (size_t)(distance)) {
    return 0;
  }
  uint8_t* q = p - distance;
  size_t n = (size_t)(io2_w - p);
  if ((size_t)(length) > n) {
    length = (uint32_t)(n);
  } else {
    n = (size_t)(length);
  }
  // TODO: unrolling by 3 seems best for the std/deflate benchmarks, but that
  // is mostly because 3 is the minimum length for the deflate format. This
  // function implementation shouldn't overfit to that one format. Perhaps the
  // limited_copy_u32_from_history Wuffs method should also take an unroll hint
  // argument, and the cgen can look if that argument is the constant
  // expression '3'.
  //
  // See also wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast
  // below.
  for (; n >= 3; n -= 3) {
    *p++ = *q++;
    *p++ = *q++;
    *p++ = *q++;
  }
  for (; n; n--) {
    *p++ = *q++;
  }
  *ptr_iop_w = p;
  return length;
}

// wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast is like
// the wuffs_private_impl__io_writer__limited_copy_u32_from_history function
// above, but has stronger pre-conditions.
//
// The caller needs to prove that:
//  - length   >= 1
//  - length   <= (io2_w      - *ptr_iop_w)
//  - distance >= 1
//  - distance <= (*ptr_iop_w - io0_w)
static inline uint32_t  //
wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast(
    uint8_t** ptr_iop_w,
    uint8_t* io0_w,
    uint8_t* io2_w,
    uint32_t length,
    uint32_t distance) {
  uint8_t* p = *ptr_iop_w;
  uint8_t* q = p - distance;
  uint32_t n = length;
  for (; n >= 3; n -= 3) {
    *p++ = *q++;
    *p++ = *q++;
    *p++ = *q++;
  }
  for (; n; n--) {
    *p++ = *q++;
  }
  *ptr_iop_w = p;
  return length;
}

// wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast_return_cusp
// is like the
// wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast function,
// but also returns the cusp: a byte pair (as a u16le) being the last byte of
// and next byte after the copied history.
//
// For example, if history was [10, 11, 12, 13, 14, 15, 16, 17, 18] then:
//  - copying l=3, d=8 produces [11, 12, 13] and the cusp is (13, 14).
//  - copying l=3, d=2 produces [17, 18, 17] and the cusp is (17, 18).
//
// The caller needs to prove that:
//  - length   >= 1
//  - length   <= (io2_w      - *ptr_iop_w)
//  - distance >= 1
//  - distance <= (*ptr_iop_w - io0_w)
static inline uint32_t  //
wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast_return_cusp(
    uint8_t** ptr_iop_w,
    uint8_t* io0_w,
    uint8_t* io2_w,
    uint32_t length,
    uint32_t distance) {
  uint8_t* p = *ptr_iop_w;
  uint8_t* q = p - distance;
  uint32_t n = length;
  for (; n >= 3; n -= 3) {
    *p++ = *q++;
    *p++ = *q++;
    *p++ = *q++;
  }
  for (; n; n--) {
    *p++ = *q++;
  }
  *ptr_iop_w = p;
  return (uint32_t)wuffs_base__peek_u16le__no_bounds_check(q - 1);
}

// wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_distance_1_fast
// copies the previous byte (the one immediately before *ptr_iop_w), copying 8
// byte chunks at a time. Each chunk contains 8 repetitions of the same byte.
//
// In terms of number of bytes copied, length is rounded up to a multiple of 8.
// As a special case, a zero length rounds up to 8 (even though 0 is already a
// multiple of 8), since there is always at least one 8 byte chunk copied.
//
// In terms of advancing *ptr_iop_w, length is not rounded up.
//
// The caller needs to prove that:
//  - length       >= 1
//  - (length + 8) <= (io2_w      - *ptr_iop_w)
//  - distance     == 1
//  - distance     <= (*ptr_iop_w - io0_w)
static inline uint32_t  //
wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_distance_1_fast(
    uint8_t** ptr_iop_w,
    uint8_t* io0_w,
    uint8_t* io2_w,
    uint32_t length,
    uint32_t distance) {
  uint8_t* p = *ptr_iop_w;
  uint64_t x = p[-1];
  x |= x << 8;
  x |= x << 16;
  x |= x << 32;
  uint32_t n = length;
  while (1) {
    wuffs_base__poke_u64le__no_bounds_check(p, x);
    if (n <= 8) {
      p += n;
      break;
    }
    p += 8;
    n -= 8;
  }
  *ptr_iop_w = p;
  return length;
}

// wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_distance_1_fast_return_cusp
// copies the previous byte (the one immediately before *ptr_iop_w), copying 8
// byte chunks at a time. Each chunk contains 8 repetitions of the same byte.
// It also returns the cusp: a byte pair (as a u16le) being the last byte of
// and next byte after the copied history.
//
// In terms of number of bytes copied, length is rounded up to a multiple of 8.
// As a special case, a zero length rounds up to 8 (even though 0 is already a
// multiple of 8), since there is always at least one 8 byte chunk copied.
//
// In terms of advancing *ptr_iop_w, length is not rounded up.
//
// The caller needs to prove that:
//  - length       >= 1
//  - (length + 8) <= (io2_w      - *ptr_iop_w)
//  - distance     == 1
//  - distance     <= (*ptr_iop_w - io0_w)
static inline uint32_t  //
wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_distance_1_fast_return_cusp(
    uint8_t** ptr_iop_w,
    uint8_t* io0_w,
    uint8_t* io2_w,
    uint32_t length,
    uint32_t distance) {
  uint8_t* p = *ptr_iop_w;
  uint8_t* q = p - distance;
  uint64_t x = p[-1];
  x |= x << 8;
  x |= x << 16;
  x |= x << 32;
  uint32_t n = length;
  while (1) {
    wuffs_base__poke_u64le__no_bounds_check(p, x);
    if (n <= 8) {
      p += n;
      q += n;
      break;
    }
    p += 8;
    q += 8;
    n -= 8;
  }
  *ptr_iop_w = p;
  return (uint32_t)wuffs_base__peek_u16le__no_bounds_check(q - 1);
}

// wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_fast
// is like the
// wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast function
// above, but copies 8 byte chunks at a time.
//
// In terms of number of bytes copied, length is rounded up to a multiple of 8.
// As a special case, a zero length rounds up to 8 (even though 0 is already a
// multiple of 8), since there is always at least one 8 byte chunk copied.
//
// In terms of advancing *ptr_iop_w, length is not rounded up.
//
// The caller needs to prove that:
//  - length       >= 1
//  - (length + 8) <= (io2_w      - *ptr_iop_w)
//  - distance     >= 8
//  - distance     <= (*ptr_iop_w - io0_w)
static inline uint32_t  //
wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_fast(
    uint8_t** ptr_iop_w,
    uint8_t* io0_w,
    uint8_t* io2_w,
    uint32_t length,
    uint32_t distance) {
  uint8_t* p = *ptr_iop_w;
  uint8_t* q = p - distance;
  uint32_t n = length;
  while (1) {
    memcpy(p, q, 8);
    if (n <= 8) {
      p += n;
      break;
    }
    p += 8;
    q += 8;
    n -= 8;
  }
  *ptr_iop_w = p;
  return length;
}

// wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_fast_return_cusp
// is like the
// wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast function
// above, but copies 8 byte chunks at a time. It also returns the cusp: a byte
// pair (as a u16le) being the last byte of and next byte after the copied
// history.
//
// In terms of number of bytes copied, length is rounded up to a multiple of 8.
// As a special case, a zero length rounds up to 8 (even though 0 is already a
// multiple of 8), since there is always at least one 8 byte chunk copied.
//
// In terms of advancing *ptr_iop_w, length is not rounded up.
//
// The caller needs to prove that:
//  - length       >= 1
//  - (length + 8) <= (io2_w      - *ptr_iop_w)
//  - distance     >= 8
//  - distance     <= (*ptr_iop_w - io0_w)
static inline uint32_t  //
wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_fast_return_cusp(
    uint8_t** ptr_iop_w,
    uint8_t* io0_w,
    uint8_t* io2_w,
    uint32_t length,
    uint32_t distance) {
  uint8_t* p = *ptr_iop_w;
  uint8_t* q = p - distance;
  uint32_t n = length;
  while (1) {
    memcpy(p, q, 8);
    if (n <= 8) {
      p += n;
      q += n;
      break;
    }
    p += 8;
    q += 8;
    n -= 8;
  }
  *ptr_iop_w = p;
  return (uint32_t)wuffs_base__peek_u16le__no_bounds_check(q - 1);
}

static inline uint32_t  //
wuffs_private_impl__io_writer__limited_copy_u32_from_reader(
    uint8_t** ptr_iop_w,
    uint8_t* io2_w,
    uint32_t length,
    const uint8_t** ptr_iop_r,
    const uint8_t* io2_r) {
  uint8_t* iop_w = *ptr_iop_w;
  size_t n = length;
  if (n > ((size_t)(io2_w - iop_w))) {
    n = (size_t)(io2_w - iop_w);
  }
  const uint8_t* iop_r = *ptr_iop_r;
  if (n > ((size_t)(io2_r - iop_r))) {
    n = (size_t)(io2_r - iop_r);
  }
  if (n > 0) {
    memmove(iop_w, iop_r, n);
    *ptr_iop_w += n;
    *ptr_iop_r += n;
  }
  return (uint32_t)(n);
}

static inline uint32_t  //
wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
    uint8_t** ptr_iop_w,
    uint8_t* io2_w,
    uint32_t length,
    wuffs_base__slice_u8 src) {
  uint8_t* iop_w = *ptr_iop_w;
  size_t n = src.len;
  if (n > length) {
    n = length;
  }
  if (n > ((size_t)(io2_w - iop_w))) {
    n = (size_t)(io2_w - iop_w);
  }
  if (n > 0) {
    memmove(iop_w, src.ptr, n);
    *ptr_iop_w += n;
  }
  return (uint32_t)(n);
}

static inline wuffs_base__io_buffer*  //
wuffs_private_impl__io_writer__set(wuffs_base__io_buffer* b,
                                   uint8_t** ptr_iop_w,
                                   uint8_t** ptr_io0_w,
                                   uint8_t** ptr_io1_w,
                                   uint8_t** ptr_io2_w,
                                   wuffs_base__slice_u8 data,
                                   uint64_t history_position) {
  b->data = data;
  b->meta.wi = 0;
  b->meta.ri = 0;
  b->meta.pos = history_position;
  b->meta.closed = false;

  *ptr_iop_w = data.ptr;
  *ptr_io0_w = data.ptr;
  *ptr_io1_w = data.ptr;
  *ptr_io2_w = data.ptr + data.len;

  return b;
}

// ---------------- I/O (Utility)

#define wuffs_base__utility__empty_io_reader wuffs_base__empty_io_reader
#define wuffs_base__utility__empty_io_writer wuffs_base__empty_io_writer

// ---------------- Tokens

// ---------------- Tokens (Utility)

// ---------------- Memory Allocation

// ---------------- Images

WUFFS_BASE__MAYBE_STATIC uint64_t  //
wuffs_base__pixel_swizzler__limited_swizzle_u32_interleaved_from_reader(
    const wuffs_base__pixel_swizzler* p,
    uint32_t up_to_num_pixels,
    wuffs_base__slice_u8 dst,
    wuffs_base__slice_u8 dst_palette,
    const uint8_t** ptr_iop_r,
    const uint8_t* io2_r);

WUFFS_BASE__MAYBE_STATIC uint64_t  //
wuffs_base__pixel_swizzler__swizzle_interleaved_from_reader(
    const wuffs_base__pixel_swizzler* p,
    wuffs_base__slice_u8 dst,
    wuffs_base__slice_u8 dst_palette,
    const uint8_t** ptr_iop_r,
    const uint8_t* io2_r);

WUFFS_BASE__MAYBE_STATIC uint64_t  //
wuffs_base__pixel_swizzler__swizzle_interleaved_transparent_black(
    const wuffs_base__pixel_swizzler* p,
    wuffs_base__slice_u8 dst,
    wuffs_base__slice_u8 dst_palette,
    uint64_t num_pixels);

WUFFS_BASE__MAYBE_STATIC wuffs_base__status  //
wuffs_base__pixel_swizzler__swizzle_ycck(
    const wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_buffer* dst,
    wuffs_base__slice_u8 dst_palette,
    uint32_t x_min_incl,
    uint32_t x_max_excl,
    uint32_t y_min_incl,
    uint32_t y_max_excl,
    wuffs_base__slice_u8 src0,
    wuffs_base__slice_u8 src1,
    wuffs_base__slice_u8 src2,
    wuffs_base__slice_u8 src3,
    uint32_t width0,
    uint32_t width1,
    uint32_t width2,
    uint32_t width3,
    uint32_t height0,
    uint32_t height1,
    uint32_t height2,
    uint32_t height3,
    uint32_t stride0,
    uint32_t stride1,
    uint32_t stride2,
    uint32_t stride3,
    uint8_t h0,
    uint8_t h1,
    uint8_t h2,
    uint8_t h3,
    uint8_t v0,
    uint8_t v1,
    uint8_t v2,
    uint8_t v3,
    bool is_rgb_or_cmyk,
    bool triangle_filter_for_2to1,
    wuffs_base__slice_u8 scratch_buffer_2k);

// ---------------- Images (Utility)

#define wuffs_base__utility__make_pixel_format wuffs_base__make_pixel_format

// ---------------- String Conversions

// ---------------- Unicode and UTF-8

// ----------------

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE) || \
    defined(WUFFS_CONFIG__MODULE__BASE__CORE)

const uint8_t wuffs_private_impl__low_bits_mask__u8[8] = {
    0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F,
};

const uint16_t wuffs_private_impl__low_bits_mask__u16[16] = {
    0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F, 0x003F, 0x007F,
    0x00FF, 0x01FF, 0x03FF, 0x07FF, 0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF,
};

const uint32_t wuffs_private_impl__low_bits_mask__u32[32] = {
    0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000F, 0x0000001F,
    0x0000003F, 0x0000007F, 0x000000FF, 0x000001FF, 0x000003FF, 0x000007FF,
    0x00000FFF, 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF, 0x0001FFFF,
    0x0003FFFF, 0x0007FFFF, 0x000FFFFF, 0x001FFFFF, 0x003FFFFF, 0x007FFFFF,
    0x00FFFFFF, 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF, 0x1FFFFFFF,
    0x3FFFFFFF, 0x7FFFFFFF,
};

const uint64_t wuffs_private_impl__low_bits_mask__u64[64] = {
    0x0000000000000000, 0x0000000000000001, 0x0000000000000003,
    0x0000000000000007, 0x000000000000000F, 0x000000000000001F,
    0x000000000000003F, 0x000000000000007F, 0x00000000000000FF,
    0x00000000000001FF, 0x00000000000003FF, 0x00000000000007FF,
    0x0000000000000FFF, 0x0000000000001FFF, 0x0000000000003FFF,
    0x0000000000007FFF, 0x000000000000FFFF, 0x000000000001FFFF,
    0x000000000003FFFF, 0x000000000007FFFF, 0x00000000000FFFFF,
    0x00000000001FFFFF, 0x00000000003FFFFF, 0x00000000007FFFFF,
    0x0000000000FFFFFF, 0x0000000001FFFFFF, 0x0000000003FFFFFF,
    0x0000000007FFFFFF, 0x000000000FFFFFFF, 0x000000001FFFFFFF,
    0x000000003FFFFFFF, 0x000000007FFFFFFF, 0x00000000FFFFFFFF,
    0x00000001FFFFFFFF, 0x00000003FFFFFFFF, 0x00000007FFFFFFFF,
    0x0000000FFFFFFFFF, 0x0000001FFFFFFFFF, 0x0000003FFFFFFFFF,
    0x0000007FFFFFFFFF, 0x000000FFFFFFFFFF, 0x000001FFFFFFFFFF,
    0x000003FFFFFFFFFF, 0x000007FFFFFFFFFF, 0x00000FFFFFFFFFFF,
    0x00001FFFFFFFFFFF, 0x00003FFFFFFFFFFF, 0x00007FFFFFFFFFFF,
    0x0000FFFFFFFFFFFF, 0x0001FFFFFFFFFFFF, 0x0003FFFFFFFFFFFF,
    0x0007FFFFFFFFFFFF, 0x000FFFFFFFFFFFFF, 0x001FFFFFFFFFFFFF,
    0x003FFFFFFFFFFFFF, 0x007FFFFFFFFFFFFF, 0x00FFFFFFFFFFFFFF,
    0x01FFFFFFFFFFFFFF, 0x03FFFFFFFFFFFFFF, 0x07FFFFFFFFFFFFFF,
    0x0FFFFFFFFFFFFFFF, 0x1FFFFFFFFFFFFFFF, 0x3FFFFFFFFFFFFFFF,
    0x7FFFFFFFFFFFFFFF,
};

const uint32_t wuffs_private_impl__pixel_format__bits_per_channel[16] = {
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x0A, 0x0C, 0x10, 0x18, 0x20, 0x30, 0x40,
};

const char wuffs_base__note__i_o_redirect[] = "@base: I/O redirect";
const char wuffs_base__note__end_of_data[] = "@base: end of data";
const char wuffs_base__note__metadata_reported[] = "@base: metadata reported";
const char wuffs_base__suspension__even_more_information[] = "$base: even more information";
const char wuffs_base__suspension__mispositioned_read[] = "$base: mispositioned read";
const char wuffs_base__suspension__mispositioned_write[] = "$base: mispositioned write";
const char wuffs_base__suspension__short_read[] = "$base: short read";
const char wuffs_base__suspension__short_workbuf[] = "$base: short workbuf";
const char wuffs_base__suspension__short_write[] = "$base: short write";
const char wuffs_base__error__bad_i_o_position[] = "#base: bad I/O position";
const char wuffs_base__error__bad_argument_length_too_short[] = "#base: bad argument (length too short)";
const char wuffs_base__error__bad_argument[] = "#base: bad argument";
const char wuffs_base__error__bad_call_sequence[] = "#base: bad call sequence";
const char wuffs_base__error__bad_data[] = "#base: bad data";
const char wuffs_base__error__bad_receiver[] = "#base: bad receiver";
const char wuffs_base__error__bad_restart[] = "#base: bad restart";
const char wuffs_base__error__bad_sizeof_receiver[] = "#base: bad sizeof receiver";
const char wuffs_base__error__bad_vtable[] = "#base: bad vtable";
const char wuffs_base__error__bad_workbuf_length[] = "#base: bad workbuf length";
const char wuffs_base__error__bad_wuffs_version[] = "#base: bad wuffs version";
const char wuffs_base__error__cannot_return_a_suspension[] = "#base: cannot return a suspension";
const char wuffs_base__error__disabled_by_wuffs_config_dst_pixel_format_enable_allowlist[] = "#base: disabled by WUFFS_CONFIG__DST_PIXEL_FORMAT__ENABLE_ALLOWLIST";
const char wuffs_base__error__disabled_by_previous_error[] = "#base: disabled by previous error";
const char wuffs_base__error__initialize_falsely_claimed_already_zeroed[] = "#base: initialize falsely claimed already zeroed";
const char wuffs_base__error__initialize_not_called[] = "#base: initialize not called";
const char wuffs_base__error__insufficient_history[] = "#base: insufficient history";
const char wuffs_base__error__interleaved_coroutine_calls[] = "#base: interleaved coroutine calls";
const char wuffs_base__error__no_more_information[] = "#base: no more information";
const char wuffs_base__error__not_enough_data[] = "#base: not enough data";
const char wuffs_base__error__out_of_bounds[] = "#base: out of bounds";
const char wuffs_base__error__unsupported_image_dimension[] = "#base: unsupported image dimension";
const char wuffs_base__error__unsupported_method[] = "#base: unsupported method";
const char wuffs_base__error__unsupported_option[] = "#base: unsupported option";
const char wuffs_base__error__unsupported_pixel_swizzler_option[] = "#base: unsupported pixel swizzler option";
const char wuffs_base__error__too_much_data[] = "#base: too much data";

const char wuffs_base__hasher_u32__vtable_name[] = "{vtable}wuffs_base__hasher_u32";
const char wuffs_base__hasher_u64__vtable_name[] = "{vtable}wuffs_base__hasher_u64";
const char wuffs_base__hasher_bitvec256__vtable_name[] = "{vtable}wuffs_base__hasher_bitvec256";
const char wuffs_base__image_decoder__vtable_name[] = "{vtable}wuffs_base__image_decoder";
const char wuffs_base__io_transformer__vtable_name[] = "{vtable}wuffs_base__io_transformer";
const char wuffs_base__token_decoder__vtable_name[] = "{vtable}wuffs_base__token_decoder";

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__BASE)  ||
        // defined(WUFFS_CONFIG__MODULE__BASE__CORE)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE) || \
    defined(WUFFS_CONFIG__MODULE__BASE__INTERFACES)

// ---------------- Interface Definitions.

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_base__hasher_u32__checksum_u32(
    const wuffs_base__hasher_u32* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u32__vtable_name) {
      const wuffs_base__hasher_u32__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u32__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->checksum_u32)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_u32__get_quirk(
    const wuffs_base__hasher_u32* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u32__vtable_name) {
      const wuffs_base__hasher_u32__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u32__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->get_quirk)(self, a_key);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__hasher_u32__set_quirk(
    wuffs_base__hasher_u32* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u32__vtable_name) {
      const wuffs_base__hasher_u32__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u32__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->set_quirk)(self, a_key, a_value);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_base__hasher_u32__update(
    wuffs_base__hasher_u32* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u32__vtable_name) {
      const wuffs_base__hasher_u32__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u32__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->update)(self, a_x);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_empty_struct();
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_base__hasher_u32__update_u32(
    wuffs_base__hasher_u32* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return 0;
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u32__vtable_name) {
      const wuffs_base__hasher_u32__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u32__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->update_u32)(self, a_x);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

// --------

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_u64__checksum_u64(
    const wuffs_base__hasher_u64* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u64__vtable_name) {
      const wuffs_base__hasher_u64__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u64__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->checksum_u64)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_u64__get_quirk(
    const wuffs_base__hasher_u64* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u64__vtable_name) {
      const wuffs_base__hasher_u64__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u64__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->get_quirk)(self, a_key);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__hasher_u64__set_quirk(
    wuffs_base__hasher_u64* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u64__vtable_name) {
      const wuffs_base__hasher_u64__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u64__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->set_quirk)(self, a_key, a_value);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_base__hasher_u64__update(
    wuffs_base__hasher_u64* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u64__vtable_name) {
      const wuffs_base__hasher_u64__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u64__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->update)(self, a_x);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_empty_struct();
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_u64__update_u64(
    wuffs_base__hasher_u64* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return 0;
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_u64__vtable_name) {
      const wuffs_base__hasher_u64__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_u64__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->update_u64)(self, a_x);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

// --------

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__bitvec256
wuffs_base__hasher_bitvec256__checksum_bitvec256(
    const wuffs_base__hasher_bitvec256* self) {
  if (!self) {
    return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_bitvec256__vtable_name) {
      const wuffs_base__hasher_bitvec256__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_bitvec256__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->checksum_bitvec256)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__hasher_bitvec256__get_quirk(
    const wuffs_base__hasher_bitvec256* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_bitvec256__vtable_name) {
      const wuffs_base__hasher_bitvec256__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_bitvec256__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->get_quirk)(self, a_key);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__hasher_bitvec256__set_quirk(
    wuffs_base__hasher_bitvec256* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_bitvec256__vtable_name) {
      const wuffs_base__hasher_bitvec256__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_bitvec256__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->set_quirk)(self, a_key, a_value);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_base__hasher_bitvec256__update(
    wuffs_base__hasher_bitvec256* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_bitvec256__vtable_name) {
      const wuffs_base__hasher_bitvec256__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_bitvec256__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->update)(self, a_x);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_empty_struct();
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__bitvec256
wuffs_base__hasher_bitvec256__update_bitvec256(
    wuffs_base__hasher_bitvec256* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__hasher_bitvec256__vtable_name) {
      const wuffs_base__hasher_bitvec256__func_ptrs* func_ptrs =
          (const wuffs_base__hasher_bitvec256__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->update_bitvec256)(self, a_x);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
}

// --------

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__decode_frame(
    wuffs_base__image_decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->decode_frame)(self, a_dst, a_src, a_blend, a_workbuf, a_opts);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__decode_frame_config(
    wuffs_base__image_decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->decode_frame_config)(self, a_dst, a_src);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__decode_image_config(
    wuffs_base__image_decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->decode_image_config)(self, a_dst, a_src);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_base__image_decoder__frame_dirty_rect(
    const wuffs_base__image_decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->frame_dirty_rect)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__utility__empty_rect_ie_u32();
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__image_decoder__get_quirk(
    const wuffs_base__image_decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->get_quirk)(self, a_key);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_base__image_decoder__num_animation_loops(
    const wuffs_base__image_decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->num_animation_loops)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__image_decoder__num_decoded_frame_configs(
    const wuffs_base__image_decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->num_decoded_frame_configs)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__image_decoder__num_decoded_frames(
    const wuffs_base__image_decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->num_decoded_frames)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__restart_frame(
    wuffs_base__image_decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->restart_frame)(self, a_index, a_io_position);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__set_quirk(
    wuffs_base__image_decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->set_quirk)(self, a_key, a_value);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_base__image_decoder__set_report_metadata(
    wuffs_base__image_decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->set_report_metadata)(self, a_fourcc, a_report);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_empty_struct();
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__image_decoder__tell_me_more(
    wuffs_base__image_decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->tell_me_more)(self, a_dst, a_minfo, a_src);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_base__image_decoder__workbuf_len(
    const wuffs_base__image_decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__image_decoder__vtable_name) {
      const wuffs_base__image_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__image_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->workbuf_len)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__utility__empty_range_ii_u64();
}

// --------

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_base__io_transformer__dst_history_retain_length(
    const wuffs_base__io_transformer* self) {
  if (!self) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__io_transformer__vtable_name) {
      const wuffs_base__io_transformer__func_ptrs* func_ptrs =
          (const wuffs_base__io_transformer__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->dst_history_retain_length)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__utility__make_optional_u63(false, 0u);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__io_transformer__get_quirk(
    const wuffs_base__io_transformer* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__io_transformer__vtable_name) {
      const wuffs_base__io_transformer__func_ptrs* func_ptrs =
          (const wuffs_base__io_transformer__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->get_quirk)(self, a_key);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__io_transformer__set_quirk(
    wuffs_base__io_transformer* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__io_transformer__vtable_name) {
      const wuffs_base__io_transformer__func_ptrs* func_ptrs =
          (const wuffs_base__io_transformer__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->set_quirk)(self, a_key, a_value);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__io_transformer__transform_io(
    wuffs_base__io_transformer* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__io_transformer__vtable_name) {
      const wuffs_base__io_transformer__func_ptrs* func_ptrs =
          (const wuffs_base__io_transformer__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->transform_io)(self, a_dst, a_src, a_workbuf);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_base__io_transformer__workbuf_len(
    const wuffs_base__io_transformer* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__io_transformer__vtable_name) {
      const wuffs_base__io_transformer__func_ptrs* func_ptrs =
          (const wuffs_base__io_transformer__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->workbuf_len)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__utility__empty_range_ii_u64();
}

// --------

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__token_decoder__decode_tokens(
    wuffs_base__token_decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__token_decoder__vtable_name) {
      const wuffs_base__token_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__token_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->decode_tokens)(self, a_dst, a_src, a_workbuf);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_base__token_decoder__get_quirk(
    const wuffs_base__token_decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__token_decoder__vtable_name) {
      const wuffs_base__token_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__token_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->get_quirk)(self, a_key);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return 0;
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_base__token_decoder__set_quirk(
    wuffs_base__token_decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
            ? wuffs_base__error__disabled_by_previous_error
            : wuffs_base__error__initialize_not_called);
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__token_decoder__vtable_name) {
      const wuffs_base__token_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__token_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->set_quirk)(self, a_key, a_value);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__make_status(wuffs_base__error__bad_vtable);
}

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_base__token_decoder__workbuf_len(
    const wuffs_base__token_decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  const wuffs_base__vtable* v = &self->private_impl.first_vtable;
  int i;
  for (i = 0; i < 63; i++) {
    if (v->vtable_name == wuffs_base__token_decoder__vtable_name) {
      const wuffs_base__token_decoder__func_ptrs* func_ptrs =
          (const wuffs_base__token_decoder__func_ptrs*)(v->function_pointers);
      return (*func_ptrs->workbuf_len)(self);
    } else if (v->vtable_name == NULL) {
      break;
    }
    v++;
  }

  return wuffs_base__utility__empty_range_ii_u64();
}

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__BASE) ||
        // defined(WUFFS_CONFIG__MODULE__BASE__INTERFACES)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE) || \
    defined(WUFFS_CONFIG__MODULE__BASE__FLOATCONV)

// ---------------- IEEE 754 Floating Point

// The etc__hpd_left_shift and etc__powers_of_5 tables were printed by
// script/print-hpd-left-shift.go. That script has an optional -comments flag,
// whose output is not copied here, which prints further detail.
//
// These tables are used in
// wuffs_private_impl__high_prec_dec__lshift_num_new_digits.

// wuffs_private_impl__hpd_left_shift[i] encodes the number of new digits
// created after multiplying a positive integer by (1 << i): the additional
// length in the decimal representation. For example, shifting "234" by 3
// (equivalent to multiplying by 8) will produce "1872". Going from a 3-length
// string to a 4-length string means that 1 new digit was added (and existing
// digits may have changed).
//
// Shifting by i can add either N or N-1 new digits, depending on whether the
// original positive integer compares >= or < to the i'th power of 5 (as 10
// equals 2 * 5). Comparison is lexicographic, not numerical.
//
// For example, shifting by 4 (i.e. multiplying by 16) can add 1 or 2 new
// digits, depending on a lexicographic comparison to (5 ** 4), i.e. "625":
//  - ("1"      << 4) is "16",       which adds 1 new digit.
//  - ("5678"   << 4) is "90848",    which adds 1 new digit.
//  - ("624"    << 4) is "9984",     which adds 1 new digit.
//  - ("62498"  << 4) is "999968",   which adds 1 new digit.
//  - ("625"    << 4) is "10000",    which adds 2 new digits.
//  - ("625001" << 4) is "10000016", which adds 2 new digits.
//  - ("7008"   << 4) is "112128",   which adds 2 new digits.
//  - ("99"     << 4) is "1584",     which adds 2 new digits.
//
// Thus, when i is 4, N is 2 and (5 ** i) is "625". This etc__hpd_left_shift
// array encodes this as:
//  - etc__hpd_left_shift[4] is 0x1006 = (2 << 11) | 0x0006.
//  - etc__hpd_left_shift[5] is 0x1009 = (? << 11) | 0x0009.
// where the ? isn't relevant for i == 4.
//
// The high 5 bits of etc__hpd_left_shift[i] is N, the higher of the two
// possible number of new digits. The low 11 bits are an offset into the
// etc__powers_of_5 array (of length 0x051C, so offsets fit in 11 bits). When i
// is 4, its offset and the next one is 6 and 9, and etc__powers_of_5[6 .. 9]
// is the string "\x06\x02\x05", so the relevant power of 5 is "625".
//
// Thanks to Ken Thompson for the original idea.
static const uint16_t wuffs_private_impl__hpd_left_shift[65] = {
    0x0000, 0x0800, 0x0801, 0x0803, 0x1006, 0x1009, 0x100D, 0x1812, 0x1817,
    0x181D, 0x2024, 0x202B, 0x2033, 0x203C, 0x2846, 0x2850, 0x285B, 0x3067,
    0x3073, 0x3080, 0x388E, 0x389C, 0x38AB, 0x38BB, 0x40CC, 0x40DD, 0x40EF,
    0x4902, 0x4915, 0x4929, 0x513E, 0x5153, 0x5169, 0x5180, 0x5998, 0x59B0,
    0x59C9, 0x61E3, 0x61FD, 0x6218, 0x6A34, 0x6A50, 0x6A6D, 0x6A8B, 0x72AA,
    0x72C9, 0x72E9, 0x7B0A, 0x7B2B, 0x7B4D, 0x8370, 0x8393, 0x83B7, 0x83DC,
    0x8C02, 0x8C28, 0x8C4F, 0x9477, 0x949F, 0x94C8, 0x9CF2, 0x051C, 0x051C,
    0x051C, 0x051C,
};

// wuffs_private_impl__powers_of_5 contains the powers of 5, concatenated
// together: "5", "25", "125", "625", "3125", etc.
static const uint8_t wuffs_private_impl__powers_of_5[0x051C] = {
    5, 2, 5, 1, 2, 5, 6, 2, 5, 3, 1, 2, 5, 1, 5, 6, 2, 5, 7, 8, 1, 2, 5, 3, 9,
    0, 6, 2, 5, 1, 9, 5, 3, 1, 2, 5, 9, 7, 6, 5, 6, 2, 5, 4, 8, 8, 2, 8, 1, 2,
    5, 2, 4, 4, 1, 4, 0, 6, 2, 5, 1, 2, 2, 0, 7, 0, 3, 1, 2, 5, 6, 1, 0, 3, 5,
    1, 5, 6, 2, 5, 3, 0, 5, 1, 7, 5, 7, 8, 1, 2, 5, 1, 5, 2, 5, 8, 7, 8, 9, 0,
    6, 2, 5, 7, 6, 2, 9, 3, 9, 4, 5, 3, 1, 2, 5, 3, 8, 1, 4, 6, 9, 7, 2, 6, 5,
    6, 2, 5, 1, 9, 0, 7, 3, 4, 8, 6, 3, 2, 8, 1, 2, 5, 9, 5, 3, 6, 7, 4, 3, 1,
    6, 4, 0, 6, 2, 5, 4, 7, 6, 8, 3, 7, 1, 5, 8, 2, 0, 3, 1, 2, 5, 2, 3, 8, 4,
    1, 8, 5, 7, 9, 1, 0, 1, 5, 6, 2, 5, 1, 1, 9, 2, 0, 9, 2, 8, 9, 5, 5, 0, 7,
    8, 1, 2, 5, 5, 9, 6, 0, 4, 6, 4, 4, 7, 7, 5, 3, 9, 0, 6, 2, 5, 2, 9, 8, 0,
    2, 3, 2, 2, 3, 8, 7, 6, 9, 5, 3, 1, 2, 5, 1, 4, 9, 0, 1, 1, 6, 1, 1, 9, 3,
    8, 4, 7, 6, 5, 6, 2, 5, 7, 4, 5, 0, 5, 8, 0, 5, 9, 6, 9, 2, 3, 8, 2, 8, 1,
    2, 5, 3, 7, 2, 5, 2, 9, 0, 2, 9, 8, 4, 6, 1, 9, 1, 4, 0, 6, 2, 5, 1, 8, 6,
    2, 6, 4, 5, 1, 4, 9, 2, 3, 0, 9, 5, 7, 0, 3, 1, 2, 5, 9, 3, 1, 3, 2, 2, 5,
    7, 4, 6, 1, 5, 4, 7, 8, 5, 1, 5, 6, 2, 5, 4, 6, 5, 6, 6, 1, 2, 8, 7, 3, 0,
    7, 7, 3, 9, 2, 5, 7, 8, 1, 2, 5, 2, 3, 2, 8, 3, 0, 6, 4, 3, 6, 5, 3, 8, 6,
    9, 6, 2, 8, 9, 0, 6, 2, 5, 1, 1, 6, 4, 1, 5, 3, 2, 1, 8, 2, 6, 9, 3, 4, 8,
    1, 4, 4, 5, 3, 1, 2, 5, 5, 8, 2, 0, 7, 6, 6, 0, 9, 1, 3, 4, 6, 7, 4, 0, 7,
    2, 2, 6, 5, 6, 2, 5, 2, 9, 1, 0, 3, 8, 3, 0, 4, 5, 6, 7, 3, 3, 7, 0, 3, 6,
    1, 3, 2, 8, 1, 2, 5, 1, 4, 5, 5, 1, 9, 1, 5, 2, 2, 8, 3, 6, 6, 8, 5, 1, 8,
    0, 6, 6, 4, 0, 6, 2, 5, 7, 2, 7, 5, 9, 5, 7, 6, 1, 4, 1, 8, 3, 4, 2, 5, 9,
    0, 3, 3, 2, 0, 3, 1, 2, 5, 3, 6, 3, 7, 9, 7, 8, 8, 0, 7, 0, 9, 1, 7, 1, 2,
    9, 5, 1, 6, 6, 0, 1, 5, 6, 2, 5, 1, 8, 1, 8, 9, 8, 9, 4, 0, 3, 5, 4, 5, 8,
    5, 6, 4, 7, 5, 8, 3, 0, 0, 7, 8, 1, 2, 5, 9, 0, 9, 4, 9, 4, 7, 0, 1, 7, 7,
    2, 9, 2, 8, 2, 3, 7, 9, 1, 5, 0, 3, 9, 0, 6, 2, 5, 4, 5, 4, 7, 4, 7, 3, 5,
    0, 8, 8, 6, 4, 6, 4, 1, 1, 8, 9, 5, 7, 5, 1, 9, 5, 3, 1, 2, 5, 2, 2, 7, 3,
    7, 3, 6, 7, 5, 4, 4, 3, 2, 3, 2, 0, 5, 9, 4, 7, 8, 7, 5, 9, 7, 6, 5, 6, 2,
    5, 1, 1, 3, 6, 8, 6, 8, 3, 7, 7, 2, 1, 6, 1, 6, 0, 2, 9, 7, 3, 9, 3, 7, 9,
    8, 8, 2, 8, 1, 2, 5, 5, 6, 8, 4, 3, 4, 1, 8, 8, 6, 0, 8, 0, 8, 0, 1, 4, 8,
    6, 9, 6, 8, 9, 9, 4, 1, 4, 0, 6, 2, 5, 2, 8, 4, 2, 1, 7, 0, 9, 4, 3, 0, 4,
    0, 4, 0, 0, 7, 4, 3, 4, 8, 4, 4, 9, 7, 0, 7, 0, 3, 1, 2, 5, 1, 4, 2, 1, 0,
    8, 5, 4, 7, 1, 5, 2, 0, 2, 0, 0, 3, 7, 1, 7, 4, 2, 2, 4, 8, 5, 3, 5, 1, 5,
    6, 2, 5, 7, 1, 0, 5, 4, 2, 7, 3, 5, 7, 6, 0, 1, 0, 0, 1, 8, 5, 8, 7, 1, 1,
    2, 4, 2, 6, 7, 5, 7, 8, 1, 2, 5, 3, 5, 5, 2, 7, 1, 3, 6, 7, 8, 8, 0, 0, 5,
    0, 0, 9, 2, 9, 3, 5, 5, 6, 2, 1, 3, 3, 7, 8, 9, 0, 6, 2, 5, 1, 7, 7, 6, 3,
    5, 6, 8, 3, 9, 4, 0, 0, 2, 5, 0, 4, 6, 4, 6, 7, 7, 8, 1, 0, 6, 6, 8, 9, 4,
    5, 3, 1, 2, 5, 8, 8, 8, 1, 7, 8, 4, 1, 9, 7, 0, 0, 1, 2, 5, 2, 3, 2, 3, 3,
    8, 9, 0, 5, 3, 3, 4, 4, 7, 2, 6, 5, 6, 2, 5, 4, 4, 4, 0, 8, 9, 2, 0, 9, 8,
    5, 0, 0, 6, 2, 6, 1, 6, 1, 6, 9, 4, 5, 2, 6, 6, 7, 2, 3, 6, 3, 2, 8, 1, 2,
    5, 2, 2, 2, 0, 4, 4, 6, 0, 4, 9, 2, 5, 0, 3, 1, 3, 0, 8, 0, 8, 4, 7, 2, 6,
    3, 3, 3, 6, 1, 8, 1, 6, 4, 0, 6, 2, 5, 1, 1, 1, 0, 2, 2, 3, 0, 2, 4, 6, 2,
    5, 1, 5, 6, 5, 4, 0, 4, 2, 3, 6, 3, 1, 6, 6, 8, 0, 9, 0, 8, 2, 0, 3, 1, 2,
    5, 5, 5, 5, 1, 1, 1, 5, 1, 2, 3, 1, 2, 5, 7, 8, 2, 7, 0, 2, 1, 1, 8, 1, 5,
    8, 3, 4, 0, 4, 5, 4, 1, 0, 1, 5, 6, 2, 5, 2, 7, 7, 5, 5, 5, 7, 5, 6, 1, 5,
    6, 2, 8, 9, 1, 3, 5, 1, 0, 5, 9, 0, 7, 9, 1, 7, 0, 2, 2, 7, 0, 5, 0, 7, 8,
    1, 2, 5, 1, 3, 8, 7, 7, 7, 8, 7, 8, 0, 7, 8, 1, 4, 4, 5, 6, 7, 5, 5, 2, 9,
    5, 3, 9, 5, 8, 5, 1, 1, 3, 5, 2, 5, 3, 9, 0, 6, 2, 5, 6, 9, 3, 8, 8, 9, 3,
    9, 0, 3, 9, 0, 7, 2, 2, 8, 3, 7, 7, 6, 4, 7, 6, 9, 7, 9, 2, 5, 5, 6, 7, 6,
    2, 6, 9, 5, 3, 1, 2, 5, 3, 4, 6, 9, 4, 4, 6, 9, 5, 1, 9, 5, 3, 6, 1, 4, 1,
    8, 8, 8, 2, 3, 8, 4, 8, 9, 6, 2, 7, 8, 3, 8, 1, 3, 4, 7, 6, 5, 6, 2, 5, 1,
    7, 3, 4, 7, 2, 3, 4, 7, 5, 9, 7, 6, 8, 0, 7, 0, 9, 4, 4, 1, 1, 9, 2, 4, 4,
    8, 1, 3, 9, 1, 9, 0, 6, 7, 3, 8, 2, 8, 1, 2, 5, 8, 6, 7, 3, 6, 1, 7, 3, 7,
    9, 8, 8, 4, 0, 3, 5, 4, 7, 2, 0, 5, 9, 6, 2, 2, 4, 0, 6, 9, 5, 9, 5, 3, 3,
    6, 9, 1, 4, 0, 6, 2, 5,
};

// --------

// wuffs_private_impl__powers_of_10 contains truncated approximations to the
// powers of 10, ranging from 1e-307 to 1e+288 inclusive, as 596 pairs of
// uint64_t values (a 128-bit mantissa).
//
// There's also an implicit third column (implied by a linear formula involving
// the base-10 exponent) that is the base-2 exponent, biased by a magic
// constant. That constant (1214 or 0x04BE) equals 1023 + 191. 1023 is the bias
// for IEEE 754 double-precision floating point. 191 is ((3 * 64) - 1) and
// wuffs_private_impl__parse_number_f64_eisel_lemire works with
// multiples-of-64-bit mantissas.
//
// For example, the third row holds the approximation to 1e-305:
//   0xE0B62E29_29ABA83C_331ACDAB_FE94DE87 * (2 ** (0x0049 - 0x04BE))
//
// Similarly, 1e+4 is approximated by:
//   0x9C400000_00000000_00000000_00000000 * (2 ** (0x044C - 0x04BE))
//
// Similarly, 1e+68 is approximated by:
//   0xED63A231_D4C4FB27_4CA7AAA8_63EE4BDD * (2 ** (0x0520 - 0x04BE))
//
// This table was generated by by script/print-mpb-powers-of-10.go
static const uint64_t wuffs_private_impl__powers_of_10[596][2] = {
    {0xA5D3B6D479F8E056, 0x8FD0C16206306BAB},  // 1e-307
    {0x8F48A4899877186C, 0xB3C4F1BA87BC8696},  // 1e-306
    {0x331ACDABFE94DE87, 0xE0B62E2929ABA83C},  // 1e-305
    {0x9FF0C08B7F1D0B14, 0x8C71DCD9BA0B4925},  // 1e-304
    {0x07ECF0AE5EE44DD9, 0xAF8E5410288E1B6F},  // 1e-303
    {0xC9E82CD9F69D6150, 0xDB71E91432B1A24A},  // 1e-302
    {0xBE311C083A225CD2, 0x892731AC9FAF056E},  // 1e-301
    {0x6DBD630A48AAF406, 0xAB70FE17C79AC6CA},  // 1e-300
    {0x092CBBCCDAD5B108, 0xD64D3D9DB981787D},  // 1e-299
    {0x25BBF56008C58EA5, 0x85F0468293F0EB4E},  // 1e-298
    {0xAF2AF2B80AF6F24E, 0xA76C582338ED2621},  // 1e-297
    {0x1AF5AF660DB4AEE1, 0xD1476E2C07286FAA},  // 1e-296
    {0x50D98D9FC890ED4D, 0x82CCA4DB847945CA},  // 1e-295
    {0xE50FF107BAB528A0, 0xA37FCE126597973C},  // 1e-294
    {0x1E53ED49A96272C8, 0xCC5FC196FEFD7D0C},  // 1e-293
    {0x25E8E89C13BB0F7A, 0xFF77B1FCBEBCDC4F},  // 1e-292
    {0x77B191618C54E9AC, 0x9FAACF3DF73609B1},  // 1e-291
    {0xD59DF5B9EF6A2417, 0xC795830D75038C1D},  // 1e-290
    {0x4B0573286B44AD1D, 0xF97AE3D0D2446F25},  // 1e-289
    {0x4EE367F9430AEC32, 0x9BECCE62836AC577},  // 1e-288
    {0x229C41F793CDA73F, 0xC2E801FB244576D5},  // 1e-287
    {0x6B43527578C1110F, 0xF3A20279ED56D48A},  // 1e-286
    {0x830A13896B78AAA9, 0x9845418C345644D6},  // 1e-285
    {0x23CC986BC656D553, 0xBE5691EF416BD60C},  // 1e-284
    {0x2CBFBE86B7EC8AA8, 0xEDEC366B11C6CB8F},  // 1e-283
    {0x7BF7D71432F3D6A9, 0x94B3A202EB1C3F39},  // 1e-282
    {0xDAF5CCD93FB0CC53, 0xB9E08A83A5E34F07},  // 1e-281
    {0xD1B3400F8F9CFF68, 0xE858AD248F5C22C9},  // 1e-280
    {0x23100809B9C21FA1, 0x91376C36D99995BE},  // 1e-279
    {0xABD40A0C2832A78A, 0xB58547448FFFFB2D},  // 1e-278
    {0x16C90C8F323F516C, 0xE2E69915B3FFF9F9},  // 1e-277
    {0xAE3DA7D97F6792E3, 0x8DD01FAD907FFC3B},  // 1e-276
    {0x99CD11CFDF41779C, 0xB1442798F49FFB4A},  // 1e-275
    {0x40405643D711D583, 0xDD95317F31C7FA1D},  // 1e-274
    {0x482835EA666B2572, 0x8A7D3EEF7F1CFC52},  // 1e-273
    {0xDA3243650005EECF, 0xAD1C8EAB5EE43B66},  // 1e-272
    {0x90BED43E40076A82, 0xD863B256369D4A40},  // 1e-271
    {0x5A7744A6E804A291, 0x873E4F75E2224E68},  // 1e-270
    {0x711515D0A205CB36, 0xA90DE3535AAAE202},  // 1e-269
    {0x0D5A5B44CA873E03, 0xD3515C2831559A83},  // 1e-268
    {0xE858790AFE9486C2, 0x8412D9991ED58091},  // 1e-267
    {0x626E974DBE39A872, 0xA5178FFF668AE0B6},  // 1e-266
    {0xFB0A3D212DC8128F, 0xCE5D73FF402D98E3},  // 1e-265
    {0x7CE66634BC9D0B99, 0x80FA687F881C7F8E},  // 1e-264
    {0x1C1FFFC1EBC44E80, 0xA139029F6A239F72},  // 1e-263
    {0xA327FFB266B56220, 0xC987434744AC874E},  // 1e-262
    {0x4BF1FF9F0062BAA8, 0xFBE9141915D7A922},  // 1e-261
    {0x6F773FC3603DB4A9, 0x9D71AC8FADA6C9B5},  // 1e-260
    {0xCB550FB4384D21D3, 0xC4CE17B399107C22},  // 1e-259
    {0x7E2A53A146606A48, 0xF6019DA07F549B2B},  // 1e-258
    {0x2EDA7444CBFC426D, 0x99C102844F94E0FB},  // 1e-257
    {0xFA911155FEFB5308, 0xC0314325637A1939},  // 1e-256
    {0x793555AB7EBA27CA, 0xF03D93EEBC589F88},  // 1e-255
    {0x4BC1558B2F3458DE, 0x96267C7535B763B5},  // 1e-254
    {0x9EB1AAEDFB016F16, 0xBBB01B9283253CA2},  // 1e-253
    {0x465E15A979C1CADC, 0xEA9C227723EE8BCB},  // 1e-252
    {0x0BFACD89EC191EC9, 0x92A1958A7675175F},  // 1e-251
    {0xCEF980EC671F667B, 0xB749FAED14125D36},  // 1e-250
    {0x82B7E12780E7401A, 0xE51C79A85916F484},  // 1e-249
    {0xD1B2ECB8B0908810, 0x8F31CC0937AE58D2},  // 1e-248
    {0x861FA7E6DCB4AA15, 0xB2FE3F0B8599EF07},  // 1e-247
    {0x67A791E093E1D49A, 0xDFBDCECE67006AC9},  // 1e-246
    {0xE0C8BB2C5C6D24E0, 0x8BD6A141006042BD},  // 1e-245
    {0x58FAE9F773886E18, 0xAECC49914078536D},  // 1e-244
    {0xAF39A475506A899E, 0xDA7F5BF590966848},  // 1e-243
    {0x6D8406C952429603, 0x888F99797A5E012D},  // 1e-242
    {0xC8E5087BA6D33B83, 0xAAB37FD7D8F58178},  // 1e-241
    {0xFB1E4A9A90880A64, 0xD5605FCDCF32E1D6},  // 1e-240
    {0x5CF2EEA09A55067F, 0x855C3BE0A17FCD26},  // 1e-239
    {0xF42FAA48C0EA481E, 0xA6B34AD8C9DFC06F},  // 1e-238
    {0xF13B94DAF124DA26, 0xD0601D8EFC57B08B},  // 1e-237
    {0x76C53D08D6B70858, 0x823C12795DB6CE57},  // 1e-236
    {0x54768C4B0C64CA6E, 0xA2CB1717B52481ED},  // 1e-235
    {0xA9942F5DCF7DFD09, 0xCB7DDCDDA26DA268},  // 1e-234
    {0xD3F93B35435D7C4C, 0xFE5D54150B090B02},  // 1e-233
    {0xC47BC5014A1A6DAF, 0x9EFA548D26E5A6E1},  // 1e-232
    {0x359AB6419CA1091B, 0xC6B8E9B0709F109A},  // 1e-231
    {0xC30163D203C94B62, 0xF867241C8CC6D4C0},  // 1e-230
    {0x79E0DE63425DCF1D, 0x9B407691D7FC44F8},  // 1e-229
    {0x985915FC12F542E4, 0xC21094364DFB5636},  // 1e-228
    {0x3E6F5B7B17B2939D, 0xF294B943E17A2BC4},  // 1e-227
    {0xA705992CEECF9C42, 0x979CF3CA6CEC5B5A},  // 1e-226
    {0x50C6FF782A838353, 0xBD8430BD08277231},  // 1e-225
    {0xA4F8BF5635246428, 0xECE53CEC4A314EBD},  // 1e-224
    {0x871B7795E136BE99, 0x940F4613AE5ED136},  // 1e-223
    {0x28E2557B59846E3F, 0xB913179899F68584},  // 1e-222
    {0x331AEADA2FE589CF, 0xE757DD7EC07426E5},  // 1e-221
    {0x3FF0D2C85DEF7621, 0x9096EA6F3848984F},  // 1e-220
    {0x0FED077A756B53A9, 0xB4BCA50B065ABE63},  // 1e-219
    {0xD3E8495912C62894, 0xE1EBCE4DC7F16DFB},  // 1e-218
    {0x64712DD7ABBBD95C, 0x8D3360F09CF6E4BD},  // 1e-217
    {0xBD8D794D96AACFB3, 0xB080392CC4349DEC},  // 1e-216
    {0xECF0D7A0FC5583A0, 0xDCA04777F541C567},  // 1e-215
    {0xF41686C49DB57244, 0x89E42CAAF9491B60},  // 1e-214
    {0x311C2875C522CED5, 0xAC5D37D5B79B6239},  // 1e-213
    {0x7D633293366B828B, 0xD77485CB25823AC7},  // 1e-212
    {0xAE5DFF9C02033197, 0x86A8D39EF77164BC},  // 1e-211
    {0xD9F57F830283FDFC, 0xA8530886B54DBDEB},  // 1e-210
    {0xD072DF63C324FD7B, 0xD267CAA862A12D66},  // 1e-209
    {0x4247CB9E59F71E6D, 0x8380DEA93DA4BC60},  // 1e-208
    {0x52D9BE85F074E608, 0xA46116538D0DEB78},  // 1e-207
    {0x67902E276C921F8B, 0xCD795BE870516656},  // 1e-206
    {0x00BA1CD8A3DB53B6, 0x806BD9714632DFF6},  // 1e-205
    {0x80E8A40ECCD228A4, 0xA086CFCD97BF97F3},  // 1e-204
    {0x6122CD128006B2CD, 0xC8A883C0FDAF7DF0},  // 1e-203
    {0x796B805720085F81, 0xFAD2A4B13D1B5D6C},  // 1e-202
    {0xCBE3303674053BB0, 0x9CC3A6EEC6311A63},  // 1e-201
    {0xBEDBFC4411068A9C, 0xC3F490AA77BD60FC},  // 1e-200
    {0xEE92FB5515482D44, 0xF4F1B4D515ACB93B},  // 1e-199
    {0x751BDD152D4D1C4A, 0x991711052D8BF3C5},  // 1e-198
    {0xD262D45A78A0635D, 0xBF5CD54678EEF0B6},  // 1e-197
    {0x86FB897116C87C34, 0xEF340A98172AACE4},  // 1e-196
    {0xD45D35E6AE3D4DA0, 0x9580869F0E7AAC0E},  // 1e-195
    {0x8974836059CCA109, 0xBAE0A846D2195712},  // 1e-194
    {0x2BD1A438703FC94B, 0xE998D258869FACD7},  // 1e-193
    {0x7B6306A34627DDCF, 0x91FF83775423CC06},  // 1e-192
    {0x1A3BC84C17B1D542, 0xB67F6455292CBF08},  // 1e-191
    {0x20CABA5F1D9E4A93, 0xE41F3D6A7377EECA},  // 1e-190
    {0x547EB47B7282EE9C, 0x8E938662882AF53E},  // 1e-189
    {0xE99E619A4F23AA43, 0xB23867FB2A35B28D},  // 1e-188
    {0x6405FA00E2EC94D4, 0xDEC681F9F4C31F31},  // 1e-187
    {0xDE83BC408DD3DD04, 0x8B3C113C38F9F37E},  // 1e-186
    {0x9624AB50B148D445, 0xAE0B158B4738705E},  // 1e-185
    {0x3BADD624DD9B0957, 0xD98DDAEE19068C76},  // 1e-184
    {0xE54CA5D70A80E5D6, 0x87F8A8D4CFA417C9},  // 1e-183
    {0x5E9FCF4CCD211F4C, 0xA9F6D30A038D1DBC},  // 1e-182
    {0x7647C3200069671F, 0xD47487CC8470652B},  // 1e-181
    {0x29ECD9F40041E073, 0x84C8D4DFD2C63F3B},  // 1e-180
    {0xF468107100525890, 0xA5FB0A17C777CF09},  // 1e-179
    {0x7182148D4066EEB4, 0xCF79CC9DB955C2CC},  // 1e-178
    {0xC6F14CD848405530, 0x81AC1FE293D599BF},  // 1e-177
    {0xB8ADA00E5A506A7C, 0xA21727DB38CB002F},  // 1e-176
    {0xA6D90811F0E4851C, 0xCA9CF1D206FDC03B},  // 1e-175
    {0x908F4A166D1DA663, 0xFD442E4688BD304A},  // 1e-174
    {0x9A598E4E043287FE, 0x9E4A9CEC15763E2E},  // 1e-173
    {0x40EFF1E1853F29FD, 0xC5DD44271AD3CDBA},  // 1e-172
    {0xD12BEE59E68EF47C, 0xF7549530E188C128},  // 1e-171
    {0x82BB74F8301958CE, 0x9A94DD3E8CF578B9},  // 1e-170
    {0xE36A52363C1FAF01, 0xC13A148E3032D6E7},  // 1e-169
    {0xDC44E6C3CB279AC1, 0xF18899B1BC3F8CA1},  // 1e-168
    {0x29AB103A5EF8C0B9, 0x96F5600F15A7B7E5},  // 1e-167
    {0x7415D448F6B6F0E7, 0xBCB2B812DB11A5DE},  // 1e-166
    {0x111B495B3464AD21, 0xEBDF661791D60F56},  // 1e-165
    {0xCAB10DD900BEEC34, 0x936B9FCEBB25C995},  // 1e-164
    {0x3D5D514F40EEA742, 0xB84687C269EF3BFB},  // 1e-163
    {0x0CB4A5A3112A5112, 0xE65829B3046B0AFA},  // 1e-162
    {0x47F0E785EABA72AB, 0x8FF71A0FE2C2E6DC},  // 1e-161
    {0x59ED216765690F56, 0xB3F4E093DB73A093},  // 1e-160
    {0x306869C13EC3532C, 0xE0F218B8D25088B8},  // 1e-159
    {0x1E414218C73A13FB, 0x8C974F7383725573},  // 1e-158
    {0xE5D1929EF90898FA, 0xAFBD2350644EEACF},  // 1e-157
    {0xDF45F746B74ABF39, 0xDBAC6C247D62A583},  // 1e-156
    {0x6B8BBA8C328EB783, 0x894BC396CE5DA772},  // 1e-155
    {0x066EA92F3F326564, 0xAB9EB47C81F5114F},  // 1e-154
    {0xC80A537B0EFEFEBD, 0xD686619BA27255A2},  // 1e-153
    {0xBD06742CE95F5F36, 0x8613FD0145877585},  // 1e-152
    {0x2C48113823B73704, 0xA798FC4196E952E7},  // 1e-151
    {0xF75A15862CA504C5, 0xD17F3B51FCA3A7A0},  // 1e-150
    {0x9A984D73DBE722FB, 0x82EF85133DE648C4},  // 1e-149
    {0xC13E60D0D2E0EBBA, 0xA3AB66580D5FDAF5},  // 1e-148
    {0x318DF905079926A8, 0xCC963FEE10B7D1B3},  // 1e-147
    {0xFDF17746497F7052, 0xFFBBCFE994E5C61F},  // 1e-146
    {0xFEB6EA8BEDEFA633, 0x9FD561F1FD0F9BD3},  // 1e-145
    {0xFE64A52EE96B8FC0, 0xC7CABA6E7C5382C8},  // 1e-144
    {0x3DFDCE7AA3C673B0, 0xF9BD690A1B68637B},  // 1e-143
    {0x06BEA10CA65C084E, 0x9C1661A651213E2D},  // 1e-142
    {0x486E494FCFF30A62, 0xC31BFA0FE5698DB8},  // 1e-141
    {0x5A89DBA3C3EFCCFA, 0xF3E2F893DEC3F126},  // 1e-140
    {0xF89629465A75E01C, 0x986DDB5C6B3A76B7},  // 1e-139
    {0xF6BBB397F1135823, 0xBE89523386091465},  // 1e-138
    {0x746AA07DED582E2C, 0xEE2BA6C0678B597F},  // 1e-137
    {0xA8C2A44EB4571CDC, 0x94DB483840B717EF},  // 1e-136
    {0x92F34D62616CE413, 0xBA121A4650E4DDEB},  // 1e-135
    {0x77B020BAF9C81D17, 0xE896A0D7E51E1566},  // 1e-134
    {0x0ACE1474DC1D122E, 0x915E2486EF32CD60},  // 1e-133
    {0x0D819992132456BA, 0xB5B5ADA8AAFF80B8},  // 1e-132
    {0x10E1FFF697ED6C69, 0xE3231912D5BF60E6},  // 1e-131
    {0xCA8D3FFA1EF463C1, 0x8DF5EFABC5979C8F},  // 1e-130
    {0xBD308FF8A6B17CB2, 0xB1736B96B6FD83B3},  // 1e-129
    {0xAC7CB3F6D05DDBDE, 0xDDD0467C64BCE4A0},  // 1e-128
    {0x6BCDF07A423AA96B, 0x8AA22C0DBEF60EE4},  // 1e-127
    {0x86C16C98D2C953C6, 0xAD4AB7112EB3929D},  // 1e-126
    {0xE871C7BF077BA8B7, 0xD89D64D57A607744},  // 1e-125
    {0x11471CD764AD4972, 0x87625F056C7C4A8B},  // 1e-124
    {0xD598E40D3DD89BCF, 0xA93AF6C6C79B5D2D},  // 1e-123
    {0x4AFF1D108D4EC2C3, 0xD389B47879823479},  // 1e-122
    {0xCEDF722A585139BA, 0x843610CB4BF160CB},  // 1e-121
    {0xC2974EB4EE658828, 0xA54394FE1EEDB8FE},  // 1e-120
    {0x733D226229FEEA32, 0xCE947A3DA6A9273E},  // 1e-119
    {0x0806357D5A3F525F, 0x811CCC668829B887},  // 1e-118
    {0xCA07C2DCB0CF26F7, 0xA163FF802A3426A8},  // 1e-117
    {0xFC89B393DD02F0B5, 0xC9BCFF6034C13052},  // 1e-116
    {0xBBAC2078D443ACE2, 0xFC2C3F3841F17C67},  // 1e-115
    {0xD54B944B84AA4C0D, 0x9D9BA7832936EDC0},  // 1e-114
    {0x0A9E795E65D4DF11, 0xC5029163F384A931},  // 1e-113
    {0x4D4617B5FF4A16D5, 0xF64335BCF065D37D},  // 1e-112
    {0x504BCED1BF8E4E45, 0x99EA0196163FA42E},  // 1e-111
    {0xE45EC2862F71E1D6, 0xC06481FB9BCF8D39},  // 1e-110
    {0x5D767327BB4E5A4C, 0xF07DA27A82C37088},  // 1e-109
    {0x3A6A07F8D510F86F, 0x964E858C91BA2655},  // 1e-108
    {0x890489F70A55368B, 0xBBE226EFB628AFEA},  // 1e-107
    {0x2B45AC74CCEA842E, 0xEADAB0ABA3B2DBE5},  // 1e-106
    {0x3B0B8BC90012929D, 0x92C8AE6B464FC96F},  // 1e-105
    {0x09CE6EBB40173744, 0xB77ADA0617E3BBCB},  // 1e-104
    {0xCC420A6A101D0515, 0xE55990879DDCAABD},  // 1e-103
    {0x9FA946824A12232D, 0x8F57FA54C2A9EAB6},  // 1e-102
    {0x47939822DC96ABF9, 0xB32DF8E9F3546564},  // 1e-101
    {0x59787E2B93BC56F7, 0xDFF9772470297EBD},  // 1e-100
    {0x57EB4EDB3C55B65A, 0x8BFBEA76C619EF36},  // 1e-99
    {0xEDE622920B6B23F1, 0xAEFAE51477A06B03},  // 1e-98
    {0xE95FAB368E45ECED, 0xDAB99E59958885C4},  // 1e-97
    {0x11DBCB0218EBB414, 0x88B402F7FD75539B},  // 1e-96
    {0xD652BDC29F26A119, 0xAAE103B5FCD2A881},  // 1e-95
    {0x4BE76D3346F0495F, 0xD59944A37C0752A2},  // 1e-94
    {0x6F70A4400C562DDB, 0x857FCAE62D8493A5},  // 1e-93
    {0xCB4CCD500F6BB952, 0xA6DFBD9FB8E5B88E},  // 1e-92
    {0x7E2000A41346A7A7, 0xD097AD07A71F26B2},  // 1e-91
    {0x8ED400668C0C28C8, 0x825ECC24C873782F},  // 1e-90
    {0x728900802F0F32FA, 0xA2F67F2DFA90563B},  // 1e-89
    {0x4F2B40A03AD2FFB9, 0xCBB41EF979346BCA},  // 1e-88
    {0xE2F610C84987BFA8, 0xFEA126B7D78186BC},  // 1e-87
    {0x0DD9CA7D2DF4D7C9, 0x9F24B832E6B0F436},  // 1e-86
    {0x91503D1C79720DBB, 0xC6EDE63FA05D3143},  // 1e-85
    {0x75A44C6397CE912A, 0xF8A95FCF88747D94},  // 1e-84
    {0xC986AFBE3EE11ABA, 0x9B69DBE1B548CE7C},  // 1e-83
    {0xFBE85BADCE996168, 0xC24452DA229B021B},  // 1e-82
    {0xFAE27299423FB9C3, 0xF2D56790AB41C2A2},  // 1e-81
    {0xDCCD879FC967D41A, 0x97C560BA6B0919A5},  // 1e-80
    {0x5400E987BBC1C920, 0xBDB6B8E905CB600F},  // 1e-79
    {0x290123E9AAB23B68, 0xED246723473E3813},  // 1e-78
    {0xF9A0B6720AAF6521, 0x9436C0760C86E30B},  // 1e-77
    {0xF808E40E8D5B3E69, 0xB94470938FA89BCE},  // 1e-76
    {0xB60B1D1230B20E04, 0xE7958CB87392C2C2},  // 1e-75
    {0xB1C6F22B5E6F48C2, 0x90BD77F3483BB9B9},  // 1e-74
    {0x1E38AEB6360B1AF3, 0xB4ECD5F01A4AA828},  // 1e-73
    {0x25C6DA63C38DE1B0, 0xE2280B6C20DD5232},  // 1e-72
    {0x579C487E5A38AD0E, 0x8D590723948A535F},  // 1e-71
    {0x2D835A9DF0C6D851, 0xB0AF48EC79ACE837},  // 1e-70
    {0xF8E431456CF88E65, 0xDCDB1B2798182244},  // 1e-69
    {0x1B8E9ECB641B58FF, 0x8A08F0F8BF0F156B},  // 1e-68
    {0xE272467E3D222F3F, 0xAC8B2D36EED2DAC5},  // 1e-67
    {0x5B0ED81DCC6ABB0F, 0xD7ADF884AA879177},  // 1e-66
    {0x98E947129FC2B4E9, 0x86CCBB52EA94BAEA},  // 1e-65
    {0x3F2398D747B36224, 0xA87FEA27A539E9A5},  // 1e-64
    {0x8EEC7F0D19A03AAD, 0xD29FE4B18E88640E},  // 1e-63
    {0x1953CF68300424AC, 0x83A3EEEEF9153E89},  // 1e-62
    {0x5FA8C3423C052DD7, 0xA48CEAAAB75A8E2B},  // 1e-61
    {0x3792F412CB06794D, 0xCDB02555653131B6},  // 1e-60
    {0xE2BBD88BBEE40BD0, 0x808E17555F3EBF11},  // 1e-59
    {0x5B6ACEAEAE9D0EC4, 0xA0B19D2AB70E6ED6},  // 1e-58
    {0xF245825A5A445275, 0xC8DE047564D20A8B},  // 1e-57
    {0xEED6E2F0F0D56712, 0xFB158592BE068D2E},  // 1e-56
    {0x55464DD69685606B, 0x9CED737BB6C4183D},  // 1e-55
    {0xAA97E14C3C26B886, 0xC428D05AA4751E4C},  // 1e-54
    {0xD53DD99F4B3066A8, 0xF53304714D9265DF},  // 1e-53
    {0xE546A8038EFE4029, 0x993FE2C6D07B7FAB},  // 1e-52
    {0xDE98520472BDD033, 0xBF8FDB78849A5F96},  // 1e-51
    {0x963E66858F6D4440, 0xEF73D256A5C0F77C},  // 1e-50
    {0xDDE7001379A44AA8, 0x95A8637627989AAD},  // 1e-49
    {0x5560C018580D5D52, 0xBB127C53B17EC159},  // 1e-48
    {0xAAB8F01E6E10B4A6, 0xE9D71B689DDE71AF},  // 1e-47
    {0xCAB3961304CA70E8, 0x9226712162AB070D},  // 1e-46
    {0x3D607B97C5FD0D22, 0xB6B00D69BB55C8D1},  // 1e-45
    {0x8CB89A7DB77C506A, 0xE45C10C42A2B3B05},  // 1e-44
    {0x77F3608E92ADB242, 0x8EB98A7A9A5B04E3},  // 1e-43
    {0x55F038B237591ED3, 0xB267ED1940F1C61C},  // 1e-42
    {0x6B6C46DEC52F6688, 0xDF01E85F912E37A3},  // 1e-41
    {0x2323AC4B3B3DA015, 0x8B61313BBABCE2C6},  // 1e-40
    {0xABEC975E0A0D081A, 0xAE397D8AA96C1B77},  // 1e-39
    {0x96E7BD358C904A21, 0xD9C7DCED53C72255},  // 1e-38
    {0x7E50D64177DA2E54, 0x881CEA14545C7575},  // 1e-37
    {0xDDE50BD1D5D0B9E9, 0xAA242499697392D2},  // 1e-36
    {0x955E4EC64B44E864, 0xD4AD2DBFC3D07787},  // 1e-35
    {0xBD5AF13BEF0B113E, 0x84EC3C97DA624AB4},  // 1e-34
    {0xECB1AD8AEACDD58E, 0xA6274BBDD0FADD61},  // 1e-33
    {0x67DE18EDA5814AF2, 0xCFB11EAD453994BA},  // 1e-32
    {0x80EACF948770CED7, 0x81CEB32C4B43FCF4},  // 1e-31
    {0xA1258379A94D028D, 0xA2425FF75E14FC31},  // 1e-30
    {0x096EE45813A04330, 0xCAD2F7F5359A3B3E},  // 1e-29
    {0x8BCA9D6E188853FC, 0xFD87B5F28300CA0D},  // 1e-28
    {0x775EA264CF55347D, 0x9E74D1B791E07E48},  // 1e-27
    {0x95364AFE032A819D, 0xC612062576589DDA},  // 1e-26
    {0x3A83DDBD83F52204, 0xF79687AED3EEC551},  // 1e-25
    {0xC4926A9672793542, 0x9ABE14CD44753B52},  // 1e-24
    {0x75B7053C0F178293, 0xC16D9A0095928A27},  // 1e-23
    {0x5324C68B12DD6338, 0xF1C90080BAF72CB1},  // 1e-22
    {0xD3F6FC16EBCA5E03, 0x971DA05074DA7BEE},  // 1e-21
    {0x88F4BB1CA6BCF584, 0xBCE5086492111AEA},  // 1e-20
    {0x2B31E9E3D06C32E5, 0xEC1E4A7DB69561A5},  // 1e-19
    {0x3AFF322E62439FCF, 0x9392EE8E921D5D07},  // 1e-18
    {0x09BEFEB9FAD487C2, 0xB877AA3236A4B449},  // 1e-17
    {0x4C2EBE687989A9B3, 0xE69594BEC44DE15B},  // 1e-16
    {0x0F9D37014BF60A10, 0x901D7CF73AB0ACD9},  // 1e-15
    {0x538484C19EF38C94, 0xB424DC35095CD80F},  // 1e-14
    {0x2865A5F206B06FB9, 0xE12E13424BB40E13},  // 1e-13
    {0xF93F87B7442E45D3, 0x8CBCCC096F5088CB},  // 1e-12
    {0xF78F69A51539D748, 0xAFEBFF0BCB24AAFE},  // 1e-11
    {0xB573440E5A884D1B, 0xDBE6FECEBDEDD5BE},  // 1e-10
    {0x31680A88F8953030, 0x89705F4136B4A597},  // 1e-9
    {0xFDC20D2B36BA7C3D, 0xABCC77118461CEFC},  // 1e-8
    {0x3D32907604691B4C, 0xD6BF94D5E57A42BC},  // 1e-7
    {0xA63F9A49C2C1B10F, 0x8637BD05AF6C69B5},  // 1e-6
    {0x0FCF80DC33721D53, 0xA7C5AC471B478423},  // 1e-5
    {0xD3C36113404EA4A8, 0xD1B71758E219652B},  // 1e-4
    {0x645A1CAC083126E9, 0x83126E978D4FDF3B},  // 1e-3
    {0x3D70A3D70A3D70A3, 0xA3D70A3D70A3D70A},  // 1e-2
    {0xCCCCCCCCCCCCCCCC, 0xCCCCCCCCCCCCCCCC},  // 1e-1
    {0x0000000000000000, 0x8000000000000000},  // 1e0
    {0x0000000000000000, 0xA000000000000000},  // 1e1
    {0x0000000000000000, 0xC800000000000000},  // 1e2
    {0x0000000000000000, 0xFA00000000000000},  // 1e3
    {0x0000000000000000, 0x9C40000000000000},  // 1e4
    {0x0000000000000000, 0xC350000000000000},  // 1e5
    {0x0000000000000000, 0xF424000000000000},  // 1e6
    {0x0000000000000000, 0x9896800000000000},  // 1e7
    {0x0000000000000000, 0xBEBC200000000000},  // 1e8
    {0x0000000000000000, 0xEE6B280000000000},  // 1e9
    {0x0000000000000000, 0x9502F90000000000},  // 1e10
    {0x0000000000000000, 0xBA43B74000000000},  // 1e11
    {0x0000000000000000, 0xE8D4A51000000000},  // 1e12
    {0x0000000000000000, 0x9184E72A00000000},  // 1e13
    {0x0000000000000000, 0xB5E620F480000000},  // 1e14
    {0x0000000000000000, 0xE35FA931A0000000},  // 1e15
    {0x0000000000000000, 0x8E1BC9BF04000000},  // 1e16
    {0x0000000000000000, 0xB1A2BC2EC5000000},  // 1e17
    {0x0000000000000000, 0xDE0B6B3A76400000},  // 1e18
    {0x0000000000000000, 0x8AC7230489E80000},  // 1e19
    {0x0000000000000000, 0xAD78EBC5AC620000},  // 1e20
    {0x0000000000000000, 0xD8D726B7177A8000},  // 1e21
    {0x0000000000000000, 0x878678326EAC9000},  // 1e22
    {0x0000000000000000, 0xA968163F0A57B400},  // 1e23
    {0x0000000000000000, 0xD3C21BCECCEDA100},  // 1e24
    {0x0000000000000000, 0x84595161401484A0},  // 1e25
    {0x0000000000000000, 0xA56FA5B99019A5C8},  // 1e26
    {0x0000000000000000, 0xCECB8F27F4200F3A},  // 1e27
    {0x4000000000000000, 0x813F3978F8940984},  // 1e28
    {0x5000000000000000, 0xA18F07D736B90BE5},  // 1e29
    {0xA400000000000000, 0xC9F2C9CD04674EDE},  // 1e30
    {0x4D00000000000000, 0xFC6F7C4045812296},  // 1e31
    {0xF020000000000000, 0x9DC5ADA82B70B59D},  // 1e32
    {0x6C28000000000000, 0xC5371912364CE305},  // 1e33
    {0xC732000000000000, 0xF684DF56C3E01BC6},  // 1e34
    {0x3C7F400000000000, 0x9A130B963A6C115C},  // 1e35
    {0x4B9F100000000000, 0xC097CE7BC90715B3},  // 1e36
    {0x1E86D40000000000, 0xF0BDC21ABB48DB20},  // 1e37
    {0x1314448000000000, 0x96769950B50D88F4},  // 1e38
    {0x17D955A000000000, 0xBC143FA4E250EB31},  // 1e39
    {0x5DCFAB0800000000, 0xEB194F8E1AE525FD},  // 1e40
    {0x5AA1CAE500000000, 0x92EFD1B8D0CF37BE},  // 1e41
    {0xF14A3D9E40000000, 0xB7ABC627050305AD},  // 1e42
    {0x6D9CCD05D0000000, 0xE596B7B0C643C719},  // 1e43
    {0xE4820023A2000000, 0x8F7E32CE7BEA5C6F},  // 1e44
    {0xDDA2802C8A800000, 0xB35DBF821AE4F38B},  // 1e45
    {0xD50B2037AD200000, 0xE0352F62A19E306E},  // 1e46
    {0x4526F422CC340000, 0x8C213D9DA502DE45},  // 1e47
    {0x9670B12B7F410000, 0xAF298D050E4395D6},  // 1e48
    {0x3C0CDD765F114000, 0xDAF3F04651D47B4C},  // 1e49
    {0xA5880A69FB6AC800, 0x88D8762BF324CD0F},  // 1e50
    {0x8EEA0D047A457A00, 0xAB0E93B6EFEE0053},  // 1e51
    {0x72A4904598D6D880, 0xD5D238A4ABE98068},  // 1e52
    {0x47A6DA2B7F864750, 0x85A36366EB71F041},  // 1e53
    {0x999090B65F67D924, 0xA70C3C40A64E6C51},  // 1e54
    {0xFFF4B4E3F741CF6D, 0xD0CF4B50CFE20765},  // 1e55
    {0xBFF8F10E7A8921A4, 0x82818F1281ED449F},  // 1e56
    {0xAFF72D52192B6A0D, 0xA321F2D7226895C7},  // 1e57
    {0x9BF4F8A69F764490, 0xCBEA6F8CEB02BB39},  // 1e58
    {0x02F236D04753D5B4, 0xFEE50B7025C36A08},  // 1e59
    {0x01D762422C946590, 0x9F4F2726179A2245},  // 1e60
    {0x424D3AD2B7B97EF5, 0xC722F0EF9D80AAD6},  // 1e61
    {0xD2E0898765A7DEB2, 0xF8EBAD2B84E0D58B},  // 1e62
    {0x63CC55F49F88EB2F, 0x9B934C3B330C8577},  // 1e63
    {0x3CBF6B71C76B25FB, 0xC2781F49FFCFA6D5},  // 1e64
    {0x8BEF464E3945EF7A, 0xF316271C7FC3908A},  // 1e65
    {0x97758BF0E3CBB5AC, 0x97EDD871CFDA3A56},  // 1e66
    {0x3D52EEED1CBEA317, 0xBDE94E8E43D0C8EC},  // 1e67
    {0x4CA7AAA863EE4BDD, 0xED63A231D4C4FB27},  // 1e68
    {0x8FE8CAA93E74EF6A, 0x945E455F24FB1CF8},  // 1e69
    {0xB3E2FD538E122B44, 0xB975D6B6EE39E436},  // 1e70
    {0x60DBBCA87196B616, 0xE7D34C64A9C85D44},  // 1e71
    {0xBC8955E946FE31CD, 0x90E40FBEEA1D3A4A},  // 1e72
    {0x6BABAB6398BDBE41, 0xB51D13AEA4A488DD},  // 1e73
    {0xC696963C7EED2DD1, 0xE264589A4DCDAB14},  // 1e74
    {0xFC1E1DE5CF543CA2, 0x8D7EB76070A08AEC},  // 1e75
    {0x3B25A55F43294BCB, 0xB0DE65388CC8ADA8},  // 1e76
    {0x49EF0EB713F39EBE, 0xDD15FE86AFFAD912},  // 1e77
    {0x6E3569326C784337, 0x8A2DBF142DFCC7AB},  // 1e78
    {0x49C2C37F07965404, 0xACB92ED9397BF996},  // 1e79
    {0xDC33745EC97BE906, 0xD7E77A8F87DAF7FB},  // 1e80
    {0x69A028BB3DED71A3, 0x86F0AC99B4E8DAFD},  // 1e81
    {0xC40832EA0D68CE0C, 0xA8ACD7C0222311BC},  // 1e82
    {0xF50A3FA490C30190, 0xD2D80DB02AABD62B},  // 1e83
    {0x792667C6DA79E0FA, 0x83C7088E1AAB65DB},  // 1e84
    {0x577001B891185938, 0xA4B8CAB1A1563F52},  // 1e85
    {0xED4C0226B55E6F86, 0xCDE6FD5E09ABCF26},  // 1e86
    {0x544F8158315B05B4, 0x80B05E5AC60B6178},  // 1e87
    {0x696361AE3DB1C721, 0xA0DC75F1778E39D6},  // 1e88
    {0x03BC3A19CD1E38E9, 0xC913936DD571C84C},  // 1e89
    {0x04AB48A04065C723, 0xFB5878494ACE3A5F},  // 1e90
    {0x62EB0D64283F9C76, 0x9D174B2DCEC0E47B},  // 1e91
    {0x3BA5D0BD324F8394, 0xC45D1DF942711D9A},  // 1e92
    {0xCA8F44EC7EE36479, 0xF5746577930D6500},  // 1e93
    {0x7E998B13CF4E1ECB, 0x9968BF6ABBE85F20},  // 1e94
    {0x9E3FEDD8C321A67E, 0xBFC2EF456AE276E8},  // 1e95
    {0xC5CFE94EF3EA101E, 0xEFB3AB16C59B14A2},  // 1e96
    {0xBBA1F1D158724A12, 0x95D04AEE3B80ECE5},  // 1e97
    {0x2A8A6E45AE8EDC97, 0xBB445DA9CA61281F},  // 1e98
    {0xF52D09D71A3293BD, 0xEA1575143CF97226},  // 1e99
    {0x593C2626705F9C56, 0x924D692CA61BE758},  // 1e100
    {0x6F8B2FB00C77836C, 0xB6E0C377CFA2E12E},  // 1e101
    {0x0B6DFB9C0F956447, 0xE498F455C38B997A},  // 1e102
    {0x4724BD4189BD5EAC, 0x8EDF98B59A373FEC},  // 1e103
    {0x58EDEC91EC2CB657, 0xB2977EE300C50FE7},  // 1e104
    {0x2F2967B66737E3ED, 0xDF3D5E9BC0F653E1},  // 1e105
    {0xBD79E0D20082EE74, 0x8B865B215899F46C},  // 1e106
    {0xECD8590680A3AA11, 0xAE67F1E9AEC07187},  // 1e107
    {0xE80E6F4820CC9495, 0xDA01EE641A708DE9},  // 1e108
    {0x3109058D147FDCDD, 0x884134FE908658B2},  // 1e109
    {0xBD4B46F0599FD415, 0xAA51823E34A7EEDE},  // 1e110
    {0x6C9E18AC7007C91A, 0xD4E5E2CDC1D1EA96},  // 1e111
    {0x03E2CF6BC604DDB0, 0x850FADC09923329E},  // 1e112
    {0x84DB8346B786151C, 0xA6539930BF6BFF45},  // 1e113
    {0xE612641865679A63, 0xCFE87F7CEF46FF16},  // 1e114
    {0x4FCB7E8F3F60C07E, 0x81F14FAE158C5F6E},  // 1e115
    {0xE3BE5E330F38F09D, 0xA26DA3999AEF7749},  // 1e116
    {0x5CADF5BFD3072CC5, 0xCB090C8001AB551C},  // 1e117
    {0x73D9732FC7C8F7F6, 0xFDCB4FA002162A63},  // 1e118
    {0x2867E7FDDCDD9AFA, 0x9E9F11C4014DDA7E},  // 1e119
    {0xB281E1FD541501B8, 0xC646D63501A1511D},  // 1e120
    {0x1F225A7CA91A4226, 0xF7D88BC24209A565},  // 1e121
    {0x3375788DE9B06958, 0x9AE757596946075F},  // 1e122
    {0x0052D6B1641C83AE, 0xC1A12D2FC3978937},  // 1e123
    {0xC0678C5DBD23A49A, 0xF209787BB47D6B84},  // 1e124
    {0xF840B7BA963646E0, 0x9745EB4D50CE6332},  // 1e125
    {0xB650E5A93BC3D898, 0xBD176620A501FBFF},  // 1e126
    {0xA3E51F138AB4CEBE, 0xEC5D3FA8CE427AFF},  // 1e127
    {0xC66F336C36B10137, 0x93BA47C980E98CDF},  // 1e128
    {0xB80B0047445D4184, 0xB8A8D9BBE123F017},  // 1e129
    {0xA60DC059157491E5, 0xE6D3102AD96CEC1D},  // 1e130
    {0x87C89837AD68DB2F, 0x9043EA1AC7E41392},  // 1e131
    {0x29BABE4598C311FB, 0xB454E4A179DD1877},  // 1e132
    {0xF4296DD6FEF3D67A, 0xE16A1DC9D8545E94},  // 1e133
    {0x1899E4A65F58660C, 0x8CE2529E2734BB1D},  // 1e134
    {0x5EC05DCFF72E7F8F, 0xB01AE745B101E9E4},  // 1e135
    {0x76707543F4FA1F73, 0xDC21A1171D42645D},  // 1e136
    {0x6A06494A791C53A8, 0x899504AE72497EBA},  // 1e137
    {0x0487DB9D17636892, 0xABFA45DA0EDBDE69},  // 1e138
    {0x45A9D2845D3C42B6, 0xD6F8D7509292D603},  // 1e139
    {0x0B8A2392BA45A9B2, 0x865B86925B9BC5C2},  // 1e140
    {0x8E6CAC7768D7141E, 0xA7F26836F282B732},  // 1e141
    {0x3207D795430CD926, 0xD1EF0244AF2364FF},  // 1e142
    {0x7F44E6BD49E807B8, 0x8335616AED761F1F},  // 1e143
    {0x5F16206C9C6209A6, 0xA402B9C5A8D3A6E7},  // 1e144
    {0x36DBA887C37A8C0F, 0xCD036837130890A1},  // 1e145
    {0xC2494954DA2C9789, 0x802221226BE55A64},  // 1e146
    {0xF2DB9BAA10B7BD6C, 0xA02AA96B06DEB0FD},  // 1e147
    {0x6F92829494E5ACC7, 0xC83553C5C8965D3D},  // 1e148
    {0xCB772339BA1F17F9, 0xFA42A8B73ABBF48C},  // 1e149
    {0xFF2A760414536EFB, 0x9C69A97284B578D7},  // 1e150
    {0xFEF5138519684ABA, 0xC38413CF25E2D70D},  // 1e151
    {0x7EB258665FC25D69, 0xF46518C2EF5B8CD1},  // 1e152
    {0xEF2F773FFBD97A61, 0x98BF2F79D5993802},  // 1e153
    {0xAAFB550FFACFD8FA, 0xBEEEFB584AFF8603},  // 1e154
    {0x95BA2A53F983CF38, 0xEEAABA2E5DBF6784},  // 1e155
    {0xDD945A747BF26183, 0x952AB45CFA97A0B2},  // 1e156
    {0x94F971119AEEF9E4, 0xBA756174393D88DF},  // 1e157
    {0x7A37CD5601AAB85D, 0xE912B9D1478CEB17},  // 1e158
    {0xAC62E055C10AB33A, 0x91ABB422CCB812EE},  // 1e159
    {0x577B986B314D6009, 0xB616A12B7FE617AA},  // 1e160
    {0xED5A7E85FDA0B80B, 0xE39C49765FDF9D94},  // 1e161
    {0x14588F13BE847307, 0x8E41ADE9FBEBC27D},  // 1e162
    {0x596EB2D8AE258FC8, 0xB1D219647AE6B31C},  // 1e163
    {0x6FCA5F8ED9AEF3BB, 0xDE469FBD99A05FE3},  // 1e164
    {0x25DE7BB9480D5854, 0x8AEC23D680043BEE},  // 1e165
    {0xAF561AA79A10AE6A, 0xADA72CCC20054AE9},  // 1e166
    {0x1B2BA1518094DA04, 0xD910F7FF28069DA4},  // 1e167
    {0x90FB44D2F05D0842, 0x87AA9AFF79042286},  // 1e168
    {0x353A1607AC744A53, 0xA99541BF57452B28},  // 1e169
    {0x42889B8997915CE8, 0xD3FA922F2D1675F2},  // 1e170
    {0x69956135FEBADA11, 0x847C9B5D7C2E09B7},  // 1e171
    {0x43FAB9837E699095, 0xA59BC234DB398C25},  // 1e172
    {0x94F967E45E03F4BB, 0xCF02B2C21207EF2E},  // 1e173
    {0x1D1BE0EEBAC278F5, 0x8161AFB94B44F57D},  // 1e174
    {0x6462D92A69731732, 0xA1BA1BA79E1632DC},  // 1e175
    {0x7D7B8F7503CFDCFE, 0xCA28A291859BBF93},  // 1e176
    {0x5CDA735244C3D43E, 0xFCB2CB35E702AF78},  // 1e177
    {0x3A0888136AFA64A7, 0x9DEFBF01B061ADAB},  // 1e178
    {0x088AAA1845B8FDD0, 0xC56BAEC21C7A1916},  // 1e179
    {0x8AAD549E57273D45, 0xF6C69A72A3989F5B},  // 1e180
    {0x36AC54E2F678864B, 0x9A3C2087A63F6399},  // 1e181
    {0x84576A1BB416A7DD, 0xC0CB28A98FCF3C7F},  // 1e182
    {0x656D44A2A11C51D5, 0xF0FDF2D3F3C30B9F},  // 1e183
    {0x9F644AE5A4B1B325, 0x969EB7C47859E743},  // 1e184
    {0x873D5D9F0DDE1FEE, 0xBC4665B596706114},  // 1e185
    {0xA90CB506D155A7EA, 0xEB57FF22FC0C7959},  // 1e186
    {0x09A7F12442D588F2, 0x9316FF75DD87CBD8},  // 1e187
    {0x0C11ED6D538AEB2F, 0xB7DCBF5354E9BECE},  // 1e188
    {0x8F1668C8A86DA5FA, 0xE5D3EF282A242E81},  // 1e189
    {0xF96E017D694487BC, 0x8FA475791A569D10},  // 1e190
    {0x37C981DCC395A9AC, 0xB38D92D760EC4455},  // 1e191
    {0x85BBE253F47B1417, 0xE070F78D3927556A},  // 1e192
    {0x93956D7478CCEC8E, 0x8C469AB843B89562},  // 1e193
    {0x387AC8D1970027B2, 0xAF58416654A6BABB},  // 1e194
    {0x06997B05FCC0319E, 0xDB2E51BFE9D0696A},  // 1e195
    {0x441FECE3BDF81F03, 0x88FCF317F22241E2},  // 1e196
    {0xD527E81CAD7626C3, 0xAB3C2FDDEEAAD25A},  // 1e197
    {0x8A71E223D8D3B074, 0xD60B3BD56A5586F1},  // 1e198
    {0xF6872D5667844E49, 0x85C7056562757456},  // 1e199
    {0xB428F8AC016561DB, 0xA738C6BEBB12D16C},  // 1e200
    {0xE13336D701BEBA52, 0xD106F86E69D785C7},  // 1e201
    {0xECC0024661173473, 0x82A45B450226B39C},  // 1e202
    {0x27F002D7F95D0190, 0xA34D721642B06084},  // 1e203
    {0x31EC038DF7B441F4, 0xCC20CE9BD35C78A5},  // 1e204
    {0x7E67047175A15271, 0xFF290242C83396CE},  // 1e205
    {0x0F0062C6E984D386, 0x9F79A169BD203E41},  // 1e206
    {0x52C07B78A3E60868, 0xC75809C42C684DD1},  // 1e207
    {0xA7709A56CCDF8A82, 0xF92E0C3537826145},  // 1e208
    {0x88A66076400BB691, 0x9BBCC7A142B17CCB},  // 1e209
    {0x6ACFF893D00EA435, 0xC2ABF989935DDBFE},  // 1e210
    {0x0583F6B8C4124D43, 0xF356F7EBF83552FE},  // 1e211
    {0xC3727A337A8B704A, 0x98165AF37B2153DE},  // 1e212
    {0x744F18C0592E4C5C, 0xBE1BF1B059E9A8D6},  // 1e213
    {0x1162DEF06F79DF73, 0xEDA2EE1C7064130C},  // 1e214
    {0x8ADDCB5645AC2BA8, 0x9485D4D1C63E8BE7},  // 1e215
    {0x6D953E2BD7173692, 0xB9A74A0637CE2EE1},  // 1e216
    {0xC8FA8DB6CCDD0437, 0xE8111C87C5C1BA99},  // 1e217
    {0x1D9C9892400A22A2, 0x910AB1D4DB9914A0},  // 1e218
    {0x2503BEB6D00CAB4B, 0xB54D5E4A127F59C8},  // 1e219
    {0x2E44AE64840FD61D, 0xE2A0B5DC971F303A},  // 1e220
    {0x5CEAECFED289E5D2, 0x8DA471A9DE737E24},  // 1e221
    {0x7425A83E872C5F47, 0xB10D8E1456105DAD},  // 1e222
    {0xD12F124E28F77719, 0xDD50F1996B947518},  // 1e223
    {0x82BD6B70D99AAA6F, 0x8A5296FFE33CC92F},  // 1e224
    {0x636CC64D1001550B, 0xACE73CBFDC0BFB7B},  // 1e225
    {0x3C47F7E05401AA4E, 0xD8210BEFD30EFA5A},  // 1e226
    {0x65ACFAEC34810A71, 0x8714A775E3E95C78},  // 1e227
    {0x7F1839A741A14D0D, 0xA8D9D1535CE3B396},  // 1e228
    {0x1EDE48111209A050, 0xD31045A8341CA07C},  // 1e229
    {0x934AED0AAB460432, 0x83EA2B892091E44D},  // 1e230
    {0xF81DA84D5617853F, 0xA4E4B66B68B65D60},  // 1e231
    {0x36251260AB9D668E, 0xCE1DE40642E3F4B9},  // 1e232
    {0xC1D72B7C6B426019, 0x80D2AE83E9CE78F3},  // 1e233
    {0xB24CF65B8612F81F, 0xA1075A24E4421730},  // 1e234
    {0xDEE033F26797B627, 0xC94930AE1D529CFC},  // 1e235
    {0x169840EF017DA3B1, 0xFB9B7CD9A4A7443C},  // 1e236
    {0x8E1F289560EE864E, 0x9D412E0806E88AA5},  // 1e237
    {0xF1A6F2BAB92A27E2, 0xC491798A08A2AD4E},  // 1e238
    {0xAE10AF696774B1DB, 0xF5B5D7EC8ACB58A2},  // 1e239
    {0xACCA6DA1E0A8EF29, 0x9991A6F3D6BF1765},  // 1e240
    {0x17FD090A58D32AF3, 0xBFF610B0CC6EDD3F},  // 1e241
    {0xDDFC4B4CEF07F5B0, 0xEFF394DCFF8A948E},  // 1e242
    {0x4ABDAF101564F98E, 0x95F83D0A1FB69CD9},  // 1e243
    {0x9D6D1AD41ABE37F1, 0xBB764C4CA7A4440F},  // 1e244
    {0x84C86189216DC5ED, 0xEA53DF5FD18D5513},  // 1e245
    {0x32FD3CF5B4E49BB4, 0x92746B9BE2F8552C},  // 1e246
    {0x3FBC8C33221DC2A1, 0xB7118682DBB66A77},  // 1e247
    {0x0FABAF3FEAA5334A, 0xE4D5E82392A40515},  // 1e248
    {0x29CB4D87F2A7400E, 0x8F05B1163BA6832D},  // 1e249
    {0x743E20E9EF511012, 0xB2C71D5BCA9023F8},  // 1e250
    {0x914DA9246B255416, 0xDF78E4B2BD342CF6},  // 1e251
    {0x1AD089B6C2F7548E, 0x8BAB8EEFB6409C1A},  // 1e252
    {0xA184AC2473B529B1, 0xAE9672ABA3D0C320},  // 1e253
    {0xC9E5D72D90A2741E, 0xDA3C0F568CC4F3E8},  // 1e254
    {0x7E2FA67C7A658892, 0x8865899617FB1871},  // 1e255
    {0xDDBB901B98FEEAB7, 0xAA7EEBFB9DF9DE8D},  // 1e256
    {0x552A74227F3EA565, 0xD51EA6FA85785631},  // 1e257
    {0xD53A88958F87275F, 0x8533285C936B35DE},  // 1e258
    {0x8A892ABAF368F137, 0xA67FF273B8460356},  // 1e259
    {0x2D2B7569B0432D85, 0xD01FEF10A657842C},  // 1e260
    {0x9C3B29620E29FC73, 0x8213F56A67F6B29B},  // 1e261
    {0x8349F3BA91B47B8F, 0xA298F2C501F45F42},  // 1e262
    {0x241C70A936219A73, 0xCB3F2F7642717713},  // 1e263
    {0xED238CD383AA0110, 0xFE0EFB53D30DD4D7},  // 1e264
    {0xF4363804324A40AA, 0x9EC95D1463E8A506},  // 1e265
    {0xB143C6053EDCD0D5, 0xC67BB4597CE2CE48},  // 1e266
    {0xDD94B7868E94050A, 0xF81AA16FDC1B81DA},  // 1e267
    {0xCA7CF2B4191C8326, 0x9B10A4E5E9913128},  // 1e268
    {0xFD1C2F611F63A3F0, 0xC1D4CE1F63F57D72},  // 1e269
    {0xBC633B39673C8CEC, 0xF24A01A73CF2DCCF},  // 1e270
    {0xD5BE0503E085D813, 0x976E41088617CA01},  // 1e271
    {0x4B2D8644D8A74E18, 0xBD49D14AA79DBC82},  // 1e272
    {0xDDF8E7D60ED1219E, 0xEC9C459D51852BA2},  // 1e273
    {0xCABB90E5C942B503, 0x93E1AB8252F33B45},  // 1e274
    {0x3D6A751F3B936243, 0xB8DA1662E7B00A17},  // 1e275
    {0x0CC512670A783AD4, 0xE7109BFBA19C0C9D},  // 1e276
    {0x27FB2B80668B24C5, 0x906A617D450187E2},  // 1e277
    {0xB1F9F660802DEDF6, 0xB484F9DC9641E9DA},  // 1e278
    {0x5E7873F8A0396973, 0xE1A63853BBD26451},  // 1e279
    {0xDB0B487B6423E1E8, 0x8D07E33455637EB2},  // 1e280
    {0x91CE1A9A3D2CDA62, 0xB049DC016ABC5E5F},  // 1e281
    {0x7641A140CC7810FB, 0xDC5C5301C56B75F7},  // 1e282
    {0xA9E904C87FCB0A9D, 0x89B9B3E11B6329BA},  // 1e283
    {0x546345FA9FBDCD44, 0xAC2820D9623BF429},  // 1e284
    {0xA97C177947AD4095, 0xD732290FBACAF133},  // 1e285
    {0x49ED8EABCCCC485D, 0x867F59A9D4BED6C0},  // 1e286
    {0x5C68F256BFFF5A74, 0xA81F301449EE8C70},  // 1e287
    {0x73832EEC6FFF3111, 0xD226FC195C6A2F8C},  // 1e288
};

// wuffs_private_impl__f64_powers_of_10 holds powers of 10 that can be exactly
// represented by a float64 (what C calls a double).
static const double wuffs_private_impl__f64_powers_of_10[23] = {
    1e0,  1e1,  1e2,  1e3,  1e4,  1e5,  1e6,  1e7,  1e8,  1e9,  1e10, 1e11,
    1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22,
};

// ---------------- IEEE 754 Floating Point

WUFFS_BASE__MAYBE_STATIC wuffs_base__lossy_value_u16  //
wuffs_base__ieee_754_bit_representation__from_f64_to_u16_truncate(double f) {
  uint64_t u = 0;
  if (sizeof(uint64_t) == sizeof(double)) {
    memcpy(&u, &f, sizeof(uint64_t));
  }
  uint16_t neg = ((uint16_t)((u >> 63) << 15));
  u &= 0x7FFFFFFFFFFFFFFF;
  uint64_t exp = u >> 52;
  uint64_t man = u & 0x000FFFFFFFFFFFFF;

  if (exp == 0x7FF) {
    if (man == 0) {  // Infinity.
      wuffs_base__lossy_value_u16 ret;
      ret.value = neg | 0x7C00;
      ret.lossy = false;
      return ret;
    }
    // NaN. Shift the 52 mantissa bits to 10 mantissa bits, keeping the most
    // significant mantissa bit (quiet vs signaling NaNs). Also set the low 9
    // bits of ret.value so that the 10-bit mantissa is non-zero.
    wuffs_base__lossy_value_u16 ret;
    ret.value = neg | 0x7DFF | ((uint16_t)(man >> 42));
    ret.lossy = false;
    return ret;

  } else if (exp > 0x40E) {  // Truncate to the largest finite f16.
    wuffs_base__lossy_value_u16 ret;
    ret.value = neg | 0x7BFF;
    ret.lossy = true;
    return ret;

  } else if (exp <= 0x3E6) {  // Truncate to zero.
    wuffs_base__lossy_value_u16 ret;
    ret.value = neg;
    ret.lossy = (u != 0);
    return ret;

  } else if (exp <= 0x3F0) {  // Normal f64, subnormal f16.
    // Convert from a 53-bit mantissa (after realizing the implicit bit) to a
    // 10-bit mantissa and then adjust for the exponent.
    man |= 0x0010000000000000;
    uint32_t shift = ((uint32_t)(1051 - exp));  // 1051 = 0x3F0 + 53 - 10.
    uint64_t shifted_man = man >> shift;
    wuffs_base__lossy_value_u16 ret;
    ret.value = neg | ((uint16_t)shifted_man);
    ret.lossy = (shifted_man << shift) != man;
    return ret;
  }

  // Normal f64, normal f16.

  // Re-bias from 1023 to 15 and shift above f16's 10 mantissa bits.
  exp = (exp - 1008) << 10;  // 1008 = 1023 - 15 = 0x3FF - 0xF.

  // Convert from a 52-bit mantissa (excluding the implicit bit) to a 10-bit
  // mantissa (again excluding the implicit bit). We lose some information if
  // any of the bottom 42 bits are non-zero.
  wuffs_base__lossy_value_u16 ret;
  ret.value = neg | ((uint16_t)exp) | ((uint16_t)(man >> 42));
  ret.lossy = (man << 22) != 0;
  return ret;
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__lossy_value_u32  //
wuffs_base__ieee_754_bit_representation__from_f64_to_u32_truncate(double f) {
  uint64_t u = 0;
  if (sizeof(uint64_t) == sizeof(double)) {
    memcpy(&u, &f, sizeof(uint64_t));
  }
  uint32_t neg = ((uint32_t)(u >> 63)) << 31;
  u &= 0x7FFFFFFFFFFFFFFF;
  uint64_t exp = u >> 52;
  uint64_t man = u & 0x000FFFFFFFFFFFFF;

  if (exp == 0x7FF) {
    if (man == 0) {  // Infinity.
      wuffs_base__lossy_value_u32 ret;
      ret.value = neg | 0x7F800000;
      ret.lossy = false;
      return ret;
    }
    // NaN. Shift the 52 mantissa bits to 23 mantissa bits, keeping the most
    // significant mantissa bit (quiet vs signaling NaNs). Also set the low 22
    // bits of ret.value so that the 23-bit mantissa is non-zero.
    wuffs_base__lossy_value_u32 ret;
    ret.value = neg | 0x7FBFFFFF | ((uint32_t)(man >> 29));
    ret.lossy = false;
    return ret;

  } else if (exp > 0x47E) {  // Truncate to the largest finite f32.
    wuffs_base__lossy_value_u32 ret;
    ret.value = neg | 0x7F7FFFFF;
    ret.lossy = true;
    return ret;

  } else if (exp <= 0x369) {  // Truncate to zero.
    wuffs_base__lossy_value_u32 ret;
    ret.value = neg;
    ret.lossy = (u != 0);
    return ret;

  } else if (exp <= 0x380) {  // Normal f64, subnormal f32.
    // Convert from a 53-bit mantissa (after realizing the implicit bit) to a
    // 23-bit mantissa and then adjust for the exponent.
    man |= 0x0010000000000000;
    uint32_t shift = ((uint32_t)(926 - exp));  // 926 = 0x380 + 53 - 23.
    uint64_t shifted_man = man >> shift;
    wuffs_base__lossy_value_u32 ret;
    ret.value = neg | ((uint32_t)shifted_man);
    ret.lossy = (shifted_man << shift) != man;
    return ret;
  }

  // Normal f64, normal f32.

  // Re-bias from 1023 to 127 and shift above f32's 23 mantissa bits.
  exp = (exp - 896) << 23;  // 896 = 1023 - 127 = 0x3FF - 0x7F.

  // Convert from a 52-bit mantissa (excluding the implicit bit) to a 23-bit
  // mantissa (again excluding the implicit bit). We lose some information if
  // any of the bottom 29 bits are non-zero.
  wuffs_base__lossy_value_u32 ret;
  ret.value = neg | ((uint32_t)exp) | ((uint32_t)(man >> 29));
  ret.lossy = (man << 35) != 0;
  return ret;
}

// --------

#define WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE 2047
#define WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION 800

// WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL is the largest N such that
// ((10 << N) < (1 << 64)).
#define WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL 60

// wuffs_private_impl__high_prec_dec (abbreviated as HPD) is a fixed precision
// floating point decimal number, augmented with ±infinity values, but it
// cannot represent NaN (Not a Number).
//
// "High precision" means that the mantissa holds 800 decimal digits. 800 is
// WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION.
//
// An HPD isn't for general purpose arithmetic, only for conversions to and
// from IEEE 754 double-precision floating point, where the largest and
// smallest positive, finite values are approximately 1.8e+308 and 4.9e-324.
// HPD exponents above +2047 mean infinity, below -2047 mean zero. The ±2047
// bounds are further away from zero than ±(324 + 800), where 800 and 2047 is
// WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION and
// WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE.
//
// digits[.. num_digits] are the number's digits in big-endian order. The
// uint8_t values are in the range [0 ..= 9], not ['0' ..= '9'], where e.g. '7'
// is the ASCII value 0x37.
//
// decimal_point is the index (within digits) of the decimal point. It may be
// negative or be larger than num_digits, in which case the explicit digits are
// padded with implicit zeroes.
//
// For example, if num_digits is 3 and digits is "\x07\x08\x09":
//  - A decimal_point of -2 means ".00789"
//  - A decimal_point of -1 means ".0789"
//  - A decimal_point of +0 means ".789"
//  - A decimal_point of +1 means "7.89"
//  - A decimal_point of +2 means "78.9"
//  - A decimal_point of +3 means "789."
//  - A decimal_point of +4 means "7890."
//  - A decimal_point of +5 means "78900."
//
// As above, a decimal_point higher than +2047 means that the overall value is
// infinity, lower than -2047 means zero.
//
// negative is a sign bit. An HPD can distinguish positive and negative zero.
//
// truncated is whether there are more than
// WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION digits, and at least one of those
// extra digits are non-zero. The existence of long-tail digits can affect
// rounding.
//
// The "all fields are zero" value is valid, and represents the number +0.
typedef struct wuffs_private_impl__high_prec_dec__struct {
  uint32_t num_digits;
  int32_t decimal_point;
  bool negative;
  bool truncated;
  uint8_t digits[WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION];
} wuffs_private_impl__high_prec_dec;

// wuffs_private_impl__high_prec_dec__trim trims trailing zeroes from the
// h->digits[.. h->num_digits] slice. They have no benefit, since we explicitly
// track h->decimal_point.
//
// Preconditions:
//  - h is non-NULL.
static inline void  //
wuffs_private_impl__high_prec_dec__trim(wuffs_private_impl__high_prec_dec* h) {
  while ((h->num_digits > 0) && (h->digits[h->num_digits - 1] == 0)) {
    h->num_digits--;
  }
}

// wuffs_private_impl__high_prec_dec__assign sets h to represent the number x.
//
// Preconditions:
//  - h is non-NULL.
static void  //
wuffs_private_impl__high_prec_dec__assign(wuffs_private_impl__high_prec_dec* h,
                                          uint64_t x,
                                          bool negative) {
  uint32_t n = 0;

  // Set h->digits.
  if (x > 0) {
    // Calculate the digits, working right-to-left. After we determine n (how
    // many digits there are), copy from buf to h->digits.
    //
    // UINT64_MAX, 18446744073709551615, is 20 digits long. It can be faster to
    // copy a constant number of bytes than a variable number (20 instead of
    // n). Make buf large enough (and start writing to it from the middle) so
    // that can we always copy 20 bytes: the slice buf[(20-n) .. (40-n)].
    uint8_t buf[40] = {0};
    uint8_t* ptr = &buf[20];
    do {
      uint64_t remaining = x / 10;
      x -= remaining * 10;
      ptr--;
      *ptr = (uint8_t)x;
      n++;
      x = remaining;
    } while (x > 0);
    memcpy(h->digits, ptr, 20);
  }

  // Set h's other fields.
  h->num_digits = n;
  h->decimal_point = (int32_t)n;
  h->negative = negative;
  h->truncated = false;
  wuffs_private_impl__high_prec_dec__trim(h);
}

static wuffs_base__status  //
wuffs_private_impl__high_prec_dec__parse(wuffs_private_impl__high_prec_dec* h,
                                         wuffs_base__slice_u8 s,
                                         uint32_t options) {
  if (!h) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  h->num_digits = 0;
  h->decimal_point = 0;
  h->negative = false;
  h->truncated = false;

  uint8_t* p = s.ptr;
  uint8_t* q = s.ptr + s.len;

  if (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES) {
    for (;; p++) {
      if (p >= q) {
        return wuffs_base__make_status(wuffs_base__error__bad_argument);
      } else if (*p != '_') {
        break;
      }
    }
  }

  // Parse sign.
  do {
    if (*p == '+') {
      p++;
    } else if (*p == '-') {
      h->negative = true;
      p++;
    } else {
      break;
    }
    if (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES) {
      for (;; p++) {
        if (p >= q) {
          return wuffs_base__make_status(wuffs_base__error__bad_argument);
        } else if (*p != '_') {
          break;
        }
      }
    }
  } while (0);

  // Parse digits, up to (and including) a '.', 'E' or 'e'. Examples for each
  // limb in this if-else chain:
  //  - "0.789"
  //  - "1002.789"
  //  - ".789"
  //  - Other (invalid input).
  uint32_t nd = 0;
  int32_t dp = 0;
  bool no_digits_before_separator = false;
  if (('0' == *p) &&
      !(options &
        WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_MULTIPLE_LEADING_ZEROES)) {
    p++;
    for (;; p++) {
      if (p >= q) {
        goto after_all;
      } else if (*p ==
                 ((options &
                   WUFFS_BASE__PARSE_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA)
                      ? ','
                      : '.')) {
        p++;
        goto after_sep;
      } else if ((*p == 'E') || (*p == 'e')) {
        p++;
        goto after_exp;
      } else if ((*p != '_') ||
                 !(options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES)) {
        return wuffs_base__make_status(wuffs_base__error__bad_argument);
      }
    }

  } else if (('0' <= *p) && (*p <= '9')) {
    if (*p == '0') {
      for (; (p < q) && (*p == '0'); p++) {
      }
    } else {
      h->digits[nd++] = (uint8_t)(*p - '0');
      dp = (int32_t)nd;
      p++;
    }

    for (;; p++) {
      if (p >= q) {
        goto after_all;
      } else if (('0' <= *p) && (*p <= '9')) {
        if (nd < WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION) {
          h->digits[nd++] = (uint8_t)(*p - '0');
          dp = (int32_t)nd;
        } else if ('0' != *p) {
          // Long-tail non-zeroes set the truncated bit.
          h->truncated = true;
        }
      } else if (*p ==
                 ((options &
                   WUFFS_BASE__PARSE_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA)
                      ? ','
                      : '.')) {
        p++;
        goto after_sep;
      } else if ((*p == 'E') || (*p == 'e')) {
        p++;
        goto after_exp;
      } else if ((*p != '_') ||
                 !(options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES)) {
        return wuffs_base__make_status(wuffs_base__error__bad_argument);
      }
    }

  } else if (*p == ((options &
                     WUFFS_BASE__PARSE_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA)
                        ? ','
                        : '.')) {
    p++;
    no_digits_before_separator = true;

  } else {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }

after_sep:
  for (;; p++) {
    if (p >= q) {
      goto after_all;
    } else if ('0' == *p) {
      if (nd == 0) {
        // Track leading zeroes implicitly.
        dp--;
      } else if (nd < WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION) {
        h->digits[nd++] = (uint8_t)(*p - '0');
      }
    } else if (('0' < *p) && (*p <= '9')) {
      if (nd < WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION) {
        h->digits[nd++] = (uint8_t)(*p - '0');
      } else {
        // Long-tail non-zeroes set the truncated bit.
        h->truncated = true;
      }
    } else if ((*p == 'E') || (*p == 'e')) {
      p++;
      goto after_exp;
    } else if ((*p != '_') ||
               !(options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES)) {
      return wuffs_base__make_status(wuffs_base__error__bad_argument);
    }
  }

after_exp:
  do {
    if (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES) {
      for (;; p++) {
        if (p >= q) {
          return wuffs_base__make_status(wuffs_base__error__bad_argument);
        } else if (*p != '_') {
          break;
        }
      }
    }

    int32_t exp_sign = +1;
    if (*p == '+') {
      p++;
    } else if (*p == '-') {
      exp_sign = -1;
      p++;
    }

    int32_t exp = 0;
    const int32_t exp_large = WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE +
                              WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION;
    bool saw_exp_digits = false;
    for (; p < q; p++) {
      if ((*p == '_') &&
          (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES)) {
        // No-op.
      } else if (('0' <= *p) && (*p <= '9')) {
        saw_exp_digits = true;
        if (exp < exp_large) {
          exp = (10 * exp) + ((int32_t)(*p - '0'));
        }
      } else {
        break;
      }
    }
    if (!saw_exp_digits) {
      return wuffs_base__make_status(wuffs_base__error__bad_argument);
    }
    dp += exp_sign * exp;
  } while (0);

after_all:
  if (p != q) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  h->num_digits = nd;
  if (nd == 0) {
    if (no_digits_before_separator) {
      return wuffs_base__make_status(wuffs_base__error__bad_argument);
    }
    h->decimal_point = 0;
  } else if (dp < -WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE) {
    h->decimal_point = -WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE - 1;
  } else if (dp > +WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE) {
    h->decimal_point = +WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE + 1;
  } else {
    h->decimal_point = dp;
  }
  wuffs_private_impl__high_prec_dec__trim(h);
  return wuffs_base__make_status(NULL);
}

// --------

// wuffs_private_impl__high_prec_dec__lshift_num_new_digits returns the number
// of additional decimal digits when left-shifting by shift.
//
// See below for preconditions.
static uint32_t  //
wuffs_private_impl__high_prec_dec__lshift_num_new_digits(
    wuffs_private_impl__high_prec_dec* h,
    uint32_t shift) {
  // Masking with 0x3F should be unnecessary (assuming the preconditions) but
  // it's cheap and ensures that we don't overflow the
  // wuffs_private_impl__hpd_left_shift array.
  shift &= 63;

  uint32_t x_a = wuffs_private_impl__hpd_left_shift[shift];
  uint32_t x_b = wuffs_private_impl__hpd_left_shift[shift + 1];
  uint32_t num_new_digits = x_a >> 11;
  uint32_t pow5_a = 0x7FF & x_a;
  uint32_t pow5_b = 0x7FF & x_b;

  const uint8_t* pow5 = &wuffs_private_impl__powers_of_5[pow5_a];
  uint32_t i = 0;
  uint32_t n = pow5_b - pow5_a;
  for (; i < n; i++) {
    if (i >= h->num_digits) {
      return num_new_digits - 1;
    } else if (h->digits[i] == pow5[i]) {
      continue;
    } else if (h->digits[i] < pow5[i]) {
      return num_new_digits - 1;
    } else {
      return num_new_digits;
    }
  }
  return num_new_digits;
}

// --------

// wuffs_private_impl__high_prec_dec__rounded_integer returns the integral
// (non-fractional) part of h, provided that it is 18 or fewer decimal digits.
// For 19 or more digits, it returns UINT64_MAX. Note that:
//  - (1 << 53) is    9007199254740992, which has 16 decimal digits.
//  - (1 << 56) is   72057594037927936, which has 17 decimal digits.
//  - (1 << 59) is  576460752303423488, which has 18 decimal digits.
//  - (1 << 63) is 9223372036854775808, which has 19 decimal digits.
// and that IEEE 754 double precision has 52 mantissa bits.
//
// That integral part is rounded-to-even: rounding 7.5 or 8.5 both give 8.
//
// h's negative bit is ignored: rounding -8.6 returns 9.
//
// See below for preconditions.
static uint64_t  //
wuffs_private_impl__high_prec_dec__rounded_integer(
    wuffs_private_impl__high_prec_dec* h) {
  if ((h->num_digits == 0) || (h->decimal_point < 0)) {
    return 0;
  } else if (h->decimal_point > 18) {
    return UINT64_MAX;
  }

  uint32_t dp = (uint32_t)(h->decimal_point);
  uint64_t n = 0;
  uint32_t i = 0;
  for (; i < dp; i++) {
    n = (10 * n) + ((i < h->num_digits) ? h->digits[i] : 0);
  }

  bool round_up = false;
  if (dp < h->num_digits) {
    round_up = h->digits[dp] >= 5;
    if ((h->digits[dp] == 5) && (dp + 1 == h->num_digits)) {
      // We are exactly halfway. If we're truncated, round up, otherwise round
      // to even.
      round_up = h->truncated ||  //
                 ((dp > 0) && (1 & h->digits[dp - 1]));
    }
  }
  if (round_up) {
    n++;
  }

  return n;
}

// wuffs_private_impl__high_prec_dec__small_xshift shifts h's number (where 'x'
// is 'l' or 'r' for left or right) by a small shift value.
//
// Preconditions:
//  - h is non-NULL.
//  - h->decimal_point is "not extreme".
//  - shift is non-zero.
//  - shift is "a small shift".
//
// "Not extreme" means within ±WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE.
//
// "A small shift" means not more than
// WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL.
//
// wuffs_private_impl__high_prec_dec__rounded_integer and
// wuffs_private_impl__high_prec_dec__lshift_num_new_digits have the same
// preconditions.
//
// wuffs_private_impl__high_prec_dec__lshift keeps the first two preconditions
// but not the last two. Its shift argument is signed and does not need to be
// "small": zero is a no-op, positive means left shift and negative means right
// shift.

static void  //
wuffs_private_impl__high_prec_dec__small_lshift(
    wuffs_private_impl__high_prec_dec* h,
    uint32_t shift) {
  if (h->num_digits == 0) {
    return;
  }
  uint32_t num_new_digits =
      wuffs_private_impl__high_prec_dec__lshift_num_new_digits(h, shift);
  uint32_t rx = h->num_digits - 1;                   // Read  index.
  uint32_t wx = h->num_digits - 1 + num_new_digits;  // Write index.
  uint64_t n = 0;

  // Repeat: pick up a digit, put down a digit, right to left.
  while (((int32_t)rx) >= 0) {
    n += ((uint64_t)(h->digits[rx])) << shift;
    uint64_t quo = n / 10;
    uint64_t rem = n - (10 * quo);
    if (wx < WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION) {
      h->digits[wx] = (uint8_t)rem;
    } else if (rem > 0) {
      h->truncated = true;
    }
    n = quo;
    wx--;
    rx--;
  }

  // Put down leading digits, right to left.
  while (n > 0) {
    uint64_t quo = n / 10;
    uint64_t rem = n - (10 * quo);
    if (wx < WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION) {
      h->digits[wx] = (uint8_t)rem;
    } else if (rem > 0) {
      h->truncated = true;
    }
    n = quo;
    wx--;
  }

  // Finish.
  h->num_digits += num_new_digits;
  if (h->num_digits > WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION) {
    h->num_digits = WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION;
  }
  h->decimal_point += (int32_t)num_new_digits;
  wuffs_private_impl__high_prec_dec__trim(h);
}

static void  //
wuffs_private_impl__high_prec_dec__small_rshift(
    wuffs_private_impl__high_prec_dec* h,
    uint32_t shift) {
  uint32_t rx = 0;  // Read  index.
  uint32_t wx = 0;  // Write index.
  uint64_t n = 0;

  // Pick up enough leading digits to cover the first shift.
  while ((n >> shift) == 0) {
    if (rx < h->num_digits) {
      // Read a digit.
      n = (10 * n) + h->digits[rx++];
    } else if (n == 0) {
      // h's number used to be zero and remains zero.
      return;
    } else {
      // Read sufficient implicit trailing zeroes.
      while ((n >> shift) == 0) {
        n = 10 * n;
        rx++;
      }
      break;
    }
  }
  h->decimal_point -= ((int32_t)(rx - 1));
  if (h->decimal_point < -WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE) {
    // After the shift, h's number is effectively zero.
    h->num_digits = 0;
    h->decimal_point = 0;
    h->truncated = false;
    return;
  }

  // Repeat: pick up a digit, put down a digit, left to right.
  uint64_t mask = (((uint64_t)(1)) << shift) - 1;
  while (rx < h->num_digits) {
    uint8_t new_digit = ((uint8_t)(n >> shift));
    n = (10 * (n & mask)) + h->digits[rx++];
    h->digits[wx++] = new_digit;
  }

  // Put down trailing digits, left to right.
  while (n > 0) {
    uint8_t new_digit = ((uint8_t)(n >> shift));
    n = 10 * (n & mask);
    if (wx < WUFFS_PRIVATE_IMPL__HPD__DIGITS_PRECISION) {
      h->digits[wx++] = new_digit;
    } else if (new_digit > 0) {
      h->truncated = true;
    }
  }

  // Finish.
  h->num_digits = wx;
  wuffs_private_impl__high_prec_dec__trim(h);
}

static void  //
wuffs_private_impl__high_prec_dec__lshift(wuffs_private_impl__high_prec_dec* h,
                                          int32_t shift) {
  if (shift > 0) {
    while (shift > +WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL) {
      wuffs_private_impl__high_prec_dec__small_lshift(
          h, WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL);
      shift -= WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL;
    }
    wuffs_private_impl__high_prec_dec__small_lshift(h, ((uint32_t)(+shift)));
  } else if (shift < 0) {
    while (shift < -WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL) {
      wuffs_private_impl__high_prec_dec__small_rshift(
          h, WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL);
      shift += WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL;
    }
    wuffs_private_impl__high_prec_dec__small_rshift(h, ((uint32_t)(-shift)));
  }
}

// --------

// wuffs_private_impl__high_prec_dec__round_etc rounds h's number. For those
// functions that take an n argument, rounding produces at most n digits (which
// is not necessarily at most n decimal places). Negative n values are ignored,
// as well as any n greater than or equal to h's number of digits. The
// etc__round_just_enough function implicitly chooses an n to implement
// WUFFS_BASE__RENDER_NUMBER_FXX__JUST_ENOUGH_PRECISION.
//
// Preconditions:
//  - h is non-NULL.
//  - h->decimal_point is "not extreme".
//
// "Not extreme" means within ±WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE.

static void  //
wuffs_private_impl__high_prec_dec__round_down(
    wuffs_private_impl__high_prec_dec* h,
    int32_t n) {
  if ((n < 0) || (h->num_digits <= (uint32_t)n)) {
    return;
  }
  h->num_digits = (uint32_t)(n);
  wuffs_private_impl__high_prec_dec__trim(h);
}

static void  //
wuffs_private_impl__high_prec_dec__round_up(
    wuffs_private_impl__high_prec_dec* h,
    int32_t n) {
  if ((n < 0) || (h->num_digits <= (uint32_t)n)) {
    return;
  }

  for (n--; n >= 0; n--) {
    if (h->digits[n] < 9) {
      h->digits[n]++;
      h->num_digits = (uint32_t)(n + 1);
      return;
    }
  }

  // The number is all 9s. Change to a single 1 and adjust the decimal point.
  h->digits[0] = 1;
  h->num_digits = 1;
  h->decimal_point++;
}

static void  //
wuffs_private_impl__high_prec_dec__round_nearest(
    wuffs_private_impl__high_prec_dec* h,
    int32_t n) {
  if ((n < 0) || (h->num_digits <= (uint32_t)n)) {
    return;
  }
  bool up = h->digits[n] >= 5;
  if ((h->digits[n] == 5) && ((n + 1) == ((int32_t)(h->num_digits)))) {
    up = h->truncated ||  //
         ((n > 0) && ((h->digits[n - 1] & 1) != 0));
  }

  if (up) {
    wuffs_private_impl__high_prec_dec__round_up(h, n);
  } else {
    wuffs_private_impl__high_prec_dec__round_down(h, n);
  }
}

static void  //
wuffs_private_impl__high_prec_dec__round_just_enough(
    wuffs_private_impl__high_prec_dec* h,
    int32_t exp2,
    uint64_t mantissa) {
  // The magic numbers 52 and 53 in this function are because IEEE 754 double
  // precision has 52 mantissa bits.
  //
  // Let f be the floating point number represented by exp2 and mantissa (and
  // also the number in h): the number (mantissa * (2 ** (exp2 - 52))).
  //
  // If f is zero or a small integer, we can return early.
  if ((mantissa == 0) ||
      ((exp2 < 53) && (h->decimal_point >= ((int32_t)(h->num_digits))))) {
    return;
  }

  // The smallest normal f has an exp2 of -1022 and a mantissa of (1 << 52).
  // Subnormal numbers have the same exp2 but a smaller mantissa.
  static const int32_t min_incl_normal_exp2 = -1022;
  static const uint64_t min_incl_normal_mantissa = 0x0010000000000000ul;

  // Compute lower and upper bounds such that any number between them (possibly
  // inclusive) will round to f. First, the lower bound. Our number f is:
  //   ((mantissa + 0)         * (2 ** (  exp2 - 52)))
  //
  // The next lowest floating point number is:
  //   ((mantissa - 1)         * (2 ** (  exp2 - 52)))
  // unless (mantissa - 1) drops the (1 << 52) bit and exp2 is not the
  // min_incl_normal_exp2. Either way, call it:
  //   ((l_mantissa)           * (2 ** (l_exp2 - 52)))
  //
  // The lower bound is halfway between them (noting that 52 became 53):
  //   (((2 * l_mantissa) + 1) * (2 ** (l_exp2 - 53)))
  int32_t l_exp2 = exp2;
  uint64_t l_mantissa = mantissa - 1;
  if ((exp2 > min_incl_normal_exp2) && (mantissa <= min_incl_normal_mantissa)) {
    l_exp2 = exp2 - 1;
    l_mantissa = (2 * mantissa) - 1;
  }
  wuffs_private_impl__high_prec_dec lower;
  wuffs_private_impl__high_prec_dec__assign(&lower, (2 * l_mantissa) + 1,
                                            false);
  wuffs_private_impl__high_prec_dec__lshift(&lower, l_exp2 - 53);

  // Next, the upper bound. Our number f is:
  //   ((mantissa + 0)       * (2 ** (exp2 - 52)))
  //
  // The next highest floating point number is:
  //   ((mantissa + 1)       * (2 ** (exp2 - 52)))
  //
  // The upper bound is halfway between them (noting that 52 became 53):
  //   (((2 * mantissa) + 1) * (2 ** (exp2 - 53)))
  wuffs_private_impl__high_prec_dec upper;
  wuffs_private_impl__high_prec_dec__assign(&upper, (2 * mantissa) + 1, false);
  wuffs_private_impl__high_prec_dec__lshift(&upper, exp2 - 53);

  // The lower and upper bounds are possible outputs only if the original
  // mantissa is even, so that IEEE round-to-even would round to the original
  // mantissa and not its neighbors.
  bool inclusive = (mantissa & 1) == 0;

  // As we walk the digits, we want to know whether rounding up would fall
  // within the upper bound. This is tracked by upper_delta:
  //  - When -1, the digits of h and upper are the same so far.
  //  - When +0, we saw a difference of 1 between h and upper on a previous
  //    digit and subsequently only 9s for h and 0s for upper. Thus, rounding
  //    up may fall outside of the bound if !inclusive.
  //  - When +1, the difference is greater than 1 and we know that rounding up
  //    falls within the bound.
  //
  // This is a state machine with three states. The numerical value for each
  // state (-1, +0 or +1) isn't important, other than their order.
  int upper_delta = -1;

  // We can now figure out the shortest number of digits required. Walk the
  // digits until h has distinguished itself from lower or upper.
  //
  // The zi and zd variables are indexes and digits, for z in l (lower), h (the
  // number) and u (upper).
  //
  // The lower, h and upper numbers may have their decimal points at different
  // places. In this case, upper is the longest, so we iterate ui starting from
  // 0 and iterate li and hi starting from either 0 or -1.
  int32_t ui = 0;
  for (;; ui++) {
    // Calculate hd, the middle number's digit.
    int32_t hi = ui - upper.decimal_point + h->decimal_point;
    if (hi >= ((int32_t)(h->num_digits))) {
      break;
    }
    uint8_t hd = (((uint32_t)hi) < h->num_digits) ? h->digits[hi] : 0;

    // Calculate ld, the lower bound's digit.
    int32_t li = ui - upper.decimal_point + lower.decimal_point;
    uint8_t ld = (((uint32_t)li) < lower.num_digits) ? lower.digits[li] : 0;

    // We can round down (truncate) if lower has a different digit than h or if
    // lower is inclusive and is exactly the result of rounding down (i.e. we
    // have reached the final digit of lower).
    bool can_round_down =
        (ld != hd) ||  //
        (inclusive && ((li + 1) == ((int32_t)(lower.num_digits))));

    // Calculate ud, the upper bound's digit, and update upper_delta.
    uint8_t ud = (((uint32_t)ui) < upper.num_digits) ? upper.digits[ui] : 0;
    if (upper_delta < 0) {
      if ((hd + 1) < ud) {
        // For example:
        // h     = 12345???
        // upper = 12347???
        upper_delta = +1;
      } else if (hd != ud) {
        // For example:
        // h     = 12345???
        // upper = 12346???
        upper_delta = +0;
      }
    } else if (upper_delta == 0) {
      if ((hd != 9) || (ud != 0)) {
        // For example:
        // h     = 1234598?
        // upper = 1234600?
        upper_delta = +1;
      }
    }

    // We can round up if upper has a different digit than h and either upper
    // is inclusive or upper is bigger than the result of rounding up.
    bool can_round_up =
        (upper_delta > 0) ||    //
        ((upper_delta == 0) &&  //
         (inclusive || ((ui + 1) < ((int32_t)(upper.num_digits)))));

    // If we can round either way, round to nearest. If we can round only one
    // way, do it. If we can't round, continue the loop.
    if (can_round_down) {
      if (can_round_up) {
        wuffs_private_impl__high_prec_dec__round_nearest(h, hi + 1);
        return;
      } else {
        wuffs_private_impl__high_prec_dec__round_down(h, hi + 1);
        return;
      }
    } else {
      if (can_round_up) {
        wuffs_private_impl__high_prec_dec__round_up(h, hi + 1);
        return;
      }
    }
  }
}

// --------

// wuffs_private_impl__parse_number_f64_eisel_lemire produces the IEEE 754
// double-precision value for an exact mantissa and base-10 exponent. For
// example:
//  - when parsing "12345.678e+02", man is 12345678 and exp10 is -1.
//  - when parsing "-12", man is 12 and exp10 is 0. Processing the leading
//    minus sign is the responsibility of the caller, not this function.
//
// On success, it returns a non-negative int64_t such that the low 63 bits hold
// the 11-bit exponent and 52-bit mantissa.
//
// On failure, it returns a negative value.
//
// The algorithm is based on an original idea by Michael Eisel that was refined
// by Daniel Lemire. See
// https://lemire.me/blog/2020/03/10/fast-float-parsing-in-practice/
// and
// https://nigeltao.github.io/blog/2020/eisel-lemire.html
//
// Preconditions:
//  - man is non-zero.
//  - exp10 is in the range [-307 ..= 288], the same range of the
//    wuffs_private_impl__powers_of_10 array.
//
// The exp10 range (and the fact that man is in the range [1 ..= UINT64_MAX],
// approximately [1 ..= 1.85e+19]) means that (man * (10 ** exp10)) is in the
// range [1e-307 ..= 1.85e+307]. This is entirely within the range of normal
// (neither subnormal nor non-finite) f64 values: DBL_MIN and DBL_MAX are
// approximately 2.23e–308 and 1.80e+308.
static int64_t  //
wuffs_private_impl__parse_number_f64_eisel_lemire(uint64_t man, int32_t exp10) {
  // Look up the (possibly truncated) base-2 representation of (10 ** exp10).
  // The look-up table was constructed so that it is already normalized: the
  // table entry's mantissa's MSB (most significant bit) is on.
  const uint64_t* po10 = &wuffs_private_impl__powers_of_10[exp10 + 307][0];

  // Normalize the man argument. The (man != 0) precondition means that a
  // non-zero bit exists.
  uint32_t clz = wuffs_base__count_leading_zeroes_u64(man);
  man <<= clz;

  // Calculate the return value's base-2 exponent. We might tweak it by ±1
  // later, but its initial value comes from a linear scaling of exp10,
  // converting from power-of-10 to power-of-2, and adjusting by clz.
  //
  // The magic constants are:
  //  - 1087 = 1023 + 64. The 1023 is the f64 exponent bias. The 64 is because
  //    the look-up table uses 64-bit mantissas.
  //  - 217706 is such that the ratio 217706 / 65536 ≈ 3.321930 is close enough
  //    (over the practical range of exp10) to log(10) / log(2) ≈ 3.321928.
  //  - 65536 = 1<<16 is arbitrary but a power of 2, so division is a shift.
  //
  // Equality of the linearly-scaled value and the actual power-of-2, over the
  // range of exp10 arguments that this function accepts, is confirmed by
  // script/print-mpb-powers-of-10.go
  uint64_t ret_exp2 =
      ((uint64_t)(((217706 * exp10) >> 16) + 1087)) - ((uint64_t)clz);

  // Multiply the two mantissas. Normalization means that both mantissas are at
  // least (1<<63), so the 128-bit product must be at least (1<<126). The high
  // 64 bits of the product, x_hi, must therefore be at least (1<<62).
  //
  // As a consequence, x_hi has either 0 or 1 leading zeroes. Shifting x_hi
  // right by either 9 or 10 bits (depending on x_hi's MSB) will therefore
  // leave the top 10 MSBs (bits 54 ..= 63) off and the 11th MSB (bit 53) on.
  wuffs_base__multiply_u64__output x = wuffs_base__multiply_u64(man, po10[1]);
  uint64_t x_hi = x.hi;
  uint64_t x_lo = x.lo;

  // Before we shift right by at least 9 bits, recall that the look-up table
  // entry was possibly truncated. We have so far only calculated a lower bound
  // for the product (man * e), where e is (10 ** exp10). The upper bound would
  // add a further (man * 1) to the 128-bit product, which overflows the lower
  // 64-bit limb if ((x_lo + man) < man).
  //
  // If overflow occurs, that adds 1 to x_hi. Since we're about to shift right
  // by at least 9 bits, that carried 1 can be ignored unless the higher 64-bit
  // limb's low 9 bits are all on.
  //
  // For example, parsing "9999999999999999999" will take the if-true branch
  // here, since:
  //  - x_hi = 0x4563918244F3FFFF
  //  - x_lo = 0x8000000000000000
  //  - man  = 0x8AC7230489E7FFFF
  if (((x_hi & 0x1FF) == 0x1FF) && ((x_lo + man) < man)) {
    // Refine our calculation of (man * e). Before, our approximation of e used
    // a "low resolution" 64-bit mantissa. Now use a "high resolution" 128-bit
    // mantissa. We've already calculated x = (man * bits_0_to_63_incl_of_e).
    // Now calculate y = (man * bits_64_to_127_incl_of_e).
    wuffs_base__multiply_u64__output y = wuffs_base__multiply_u64(man, po10[0]);
    uint64_t y_hi = y.hi;
    uint64_t y_lo = y.lo;

    // Merge the 128-bit x and 128-bit y, which overlap by 64 bits, to
    // calculate the 192-bit product of the 64-bit man by the 128-bit e.
    // As we exit this if-block, we only care about the high 128 bits
    // (merged_hi and merged_lo) of that 192-bit product.
    //
    // For example, parsing "1.234e-45" will take the if-true branch here,
    // since:
    //  - x_hi = 0x70B7E3696DB29FFF
    //  - x_lo = 0xE040000000000000
    //  - y_hi = 0x33718BBEAB0E0D7A
    //  - y_lo = 0xA880000000000000
    uint64_t merged_hi = x_hi;
    uint64_t merged_lo = x_lo + y_hi;
    if (merged_lo < x_lo) {
      merged_hi++;  // Carry the overflow bit.
    }

    // The "high resolution" approximation of e is still a lower bound. Once
    // again, see if the upper bound is large enough to produce a different
    // result. This time, if it does, give up instead of reaching for an even
    // more precise approximation to e.
    //
    // This three-part check is similar to the two-part check that guarded the
    // if block that we're now in, but it has an extra term for the middle 64
    // bits (checking that adding 1 to merged_lo would overflow).
    //
    // For example, parsing "5.9604644775390625e-8" will take the if-true
    // branch here, since:
    //  - merged_hi = 0x7FFFFFFFFFFFFFFF
    //  - merged_lo = 0xFFFFFFFFFFFFFFFF
    //  - y_lo      = 0x4DB3FFC120988200
    //  - man       = 0xD3C21BCECCEDA100
    if (((merged_hi & 0x1FF) == 0x1FF) && ((merged_lo + 1) == 0) &&
        (y_lo + man < man)) {
      return -1;
    }

    // Replace the 128-bit x with merged.
    x_hi = merged_hi;
    x_lo = merged_lo;
  }

  // As mentioned above, shifting x_hi right by either 9 or 10 bits will leave
  // the top 10 MSBs (bits 54 ..= 63) off and the 11th MSB (bit 53) on. If the
  // MSB (before shifting) was on, adjust ret_exp2 for the larger shift.
  //
  // Having bit 53 on (and higher bits off) means that ret_mantissa is a 54-bit
  // number.
  uint64_t msb = x_hi >> 63;
  uint64_t ret_mantissa = x_hi >> (msb + 9);
  ret_exp2 -= 1 ^ msb;

  // IEEE 754 rounds to-nearest with ties rounded to-even. Rounding to-even can
  // be tricky. If we're half-way between two exactly representable numbers
  // (x's low 73 bits are zero and the next 2 bits that matter are "01"), give
  // up instead of trying to pick the winner.
  //
  // Technically, we could tighten the condition by changing "73" to "73 or 74,
  // depending on msb", but a flat "73" is simpler.
  //
  // For example, parsing "1e+23" will take the if-true branch here, since:
  //  - x_hi          = 0x54B40B1F852BDA00
  //  - ret_mantissa  = 0x002A5A058FC295ED
  if ((x_lo == 0) && ((x_hi & 0x1FF) == 0) && ((ret_mantissa & 3) == 1)) {
    return -1;
  }

  // If we're not halfway then it's rounding to-nearest. Starting with a 54-bit
  // number, carry the lowest bit (bit 0) up if it's on. Regardless of whether
  // it was on or off, shifting right by one then produces a 53-bit number. If
  // carrying up overflowed, shift again.
  ret_mantissa += ret_mantissa & 1;
  ret_mantissa >>= 1;
  // This if block is equivalent to (but benchmarks slightly faster than) the
  // following branchless form:
  //    uint64_t overflow_adjustment = ret_mantissa >> 53;
  //    ret_mantissa >>= overflow_adjustment;
  //    ret_exp2 += overflow_adjustment;
  //
  // For example, parsing "7.2057594037927933e+16" will take the if-true
  // branch here, since:
  //  - x_hi          = 0x7FFFFFFFFFFFFE80
  //  - ret_mantissa  = 0x0020000000000000
  if ((ret_mantissa >> 53) > 0) {
    ret_mantissa >>= 1;
    ret_exp2++;
  }

  // Starting with a 53-bit number, IEEE 754 double-precision normal numbers
  // have an implicit mantissa bit. Mask that away and keep the low 52 bits.
  ret_mantissa &= 0x000FFFFFFFFFFFFF;

  // Pack the bits and return.
  return ((int64_t)(ret_mantissa | (ret_exp2 << 52)));
}

// --------

static wuffs_base__result_f64  //
wuffs_private_impl__parse_number_f64_special(wuffs_base__slice_u8 s,
                                             uint32_t options) {
  do {
    if (options & WUFFS_BASE__PARSE_NUMBER_FXX__REJECT_INF_AND_NAN) {
      goto fail;
    }

    uint8_t* p = s.ptr;
    uint8_t* q = s.ptr + s.len;

    for (; (p < q) && (*p == '_'); p++) {
    }
    if (p >= q) {
      goto fail;
    }

    // Parse sign.
    bool negative = false;
    do {
      if (*p == '+') {
        p++;
      } else if (*p == '-') {
        negative = true;
        p++;
      } else {
        break;
      }
      for (; (p < q) && (*p == '_'); p++) {
      }
    } while (0);
    if (p >= q) {
      goto fail;
    }

    bool nan = false;
    switch (p[0]) {
      case 'I':
      case 'i':
        if (((q - p) < 3) ||                     //
            ((p[1] != 'N') && (p[1] != 'n')) ||  //
            ((p[2] != 'F') && (p[2] != 'f'))) {
          goto fail;
        }
        p += 3;

        if ((p >= q) || (*p == '_')) {
          break;
        } else if (((q - p) < 5) ||                     //
                   ((p[0] != 'I') && (p[0] != 'i')) ||  //
                   ((p[1] != 'N') && (p[1] != 'n')) ||  //
                   ((p[2] != 'I') && (p[2] != 'i')) ||  //
                   ((p[3] != 'T') && (p[3] != 't')) ||  //
                   ((p[4] != 'Y') && (p[4] != 'y'))) {
          goto fail;
        }
        p += 5;

        if ((p >= q) || (*p == '_')) {
          break;
        }
        goto fail;

      case 'N':
      case 'n':
        if (((q - p) < 3) ||                     //
            ((p[1] != 'A') && (p[1] != 'a')) ||  //
            ((p[2] != 'N') && (p[2] != 'n'))) {
          goto fail;
        }
        p += 3;

        if ((p >= q) || (*p == '_')) {
          nan = true;
          break;
        }
        goto fail;

      default:
        goto fail;
    }

    // Finish.
    for (; (p < q) && (*p == '_'); p++) {
    }
    if (p != q) {
      goto fail;
    }
    wuffs_base__result_f64 ret;
    ret.status.repr = NULL;
    ret.value = wuffs_base__ieee_754_bit_representation__from_u64_to_f64(
        (nan ? 0x7FFFFFFFFFFFFFFF : 0x7FF0000000000000) |
        (negative ? 0x8000000000000000 : 0));
    return ret;
  } while (0);

fail:
  do {
    wuffs_base__result_f64 ret;
    ret.status.repr = wuffs_base__error__bad_argument;
    ret.value = 0;
    return ret;
  } while (0);
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__result_f64  //
wuffs_private_impl__high_prec_dec__to_f64(wuffs_private_impl__high_prec_dec* h,
                                          uint32_t options) {
  do {
    // powers converts decimal powers of 10 to binary powers of 2. For example,
    // (10000 >> 13) is 1. It stops before the elements exceed 60, also known
    // as WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL.
    //
    // This rounds down (1<<13 is a lower bound for 1e4). Adding 1 to the array
    // element value rounds up (1<<14 is an upper bound for 1e4) while staying
    // at or below WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL.
    //
    // When starting in the range [1e+1 .. 1e+2] (i.e. h->decimal_point == +2),
    // powers[2] == 6 and so:
    //  - Right shifting by 6+0 produces the range [10/64 .. 100/64] =
    //    [0.156250 .. 1.56250]. The resultant h->decimal_point is +0 or +1.
    //  - Right shifting by 6+1 produces the range [10/128 .. 100/128] =
    //    [0.078125 .. 0.78125]. The resultant h->decimal_point is -1 or -0.
    //
    // When starting in the range [1e-3 .. 1e-2] (i.e. h->decimal_point == -2),
    // powers[2] == 6 and so:
    //  - Left shifting by 6+0 produces the range [0.001*64 .. 0.01*64] =
    //    [0.064 .. 0.64]. The resultant h->decimal_point is -1 or -0.
    //  - Left shifting by 6+1 produces the range [0.001*128 .. 0.01*128] =
    //    [0.128 .. 1.28]. The resultant h->decimal_point is +0 or +1.
    //
    // Thus, when targeting h->decimal_point being +0 or +1, use (powers[n]+0)
    // when right shifting but (powers[n]+1) when left shifting.
    static const uint32_t num_powers = 19;
    static const uint8_t powers[19] = {
        0,  3,  6,  9,  13, 16, 19, 23, 26, 29,  //
        33, 36, 39, 43, 46, 49, 53, 56, 59,      //
    };

    // Handle zero and obvious extremes. The largest and smallest positive
    // finite f64 values are approximately 1.8e+308 and 4.9e-324.
    if ((h->num_digits == 0) || (h->decimal_point < -326)) {
      goto zero;
    } else if (h->decimal_point > 310) {
      goto infinity;
    }

    // Try the fast Eisel-Lemire algorithm again. Calculating the (man, exp10)
    // pair from the high_prec_dec h is more correct but slower than the
    // approach taken in wuffs_base__parse_number_f64. The latter is optimized
    // for the common cases (e.g. assuming no underscores or a leading '+'
    // sign) rather than the full set of cases allowed by the Wuffs API.
    //
    // When we have 19 or fewer mantissa digits, run Eisel-Lemire once (trying
    // for an exact result). When we have more than 19 mantissa digits, run it
    // twice to get a lower and upper bound. We still have an exact result
    // (within f64's rounding margin) if both bounds are equal (and valid).
    uint32_t i_max = h->num_digits;
    if (i_max > 19) {
      i_max = 19;
    }
    int32_t exp10 = h->decimal_point - ((int32_t)i_max);
    if ((-307 <= exp10) && (exp10 <= 288)) {
      uint64_t man = 0;
      uint32_t i;
      for (i = 0; i < i_max; i++) {
        man = (10 * man) + h->digits[i];
      }
      while (man != 0) {  // The 'while' is just an 'if' that we can 'break'.
        int64_t r0 =
            wuffs_private_impl__parse_number_f64_eisel_lemire(man + 0, exp10);
        if (r0 < 0) {
          break;
        } else if (h->num_digits > 19) {
          int64_t r1 =
              wuffs_private_impl__parse_number_f64_eisel_lemire(man + 1, exp10);
          if (r1 != r0) {
            break;
          }
        }
        wuffs_base__result_f64 ret;
        ret.status.repr = NULL;
        ret.value = wuffs_base__ieee_754_bit_representation__from_u64_to_f64(
            ((uint64_t)r0) | (((uint64_t)(h->negative)) << 63));
        return ret;
      }
    }

    // When Eisel-Lemire fails, fall back to Simple Decimal Conversion. See
    // https://nigeltao.github.io/blog/2020/parse-number-f64-simple.html
    //
    // Scale by powers of 2 until we're in the range [0.1 .. 10]. Equivalently,
    // that h->decimal_point is +0 or +1.
    //
    // First we shift right while at or above 10...
    const int32_t f64_bias = -1023;
    int32_t exp2 = 0;
    while (h->decimal_point > 1) {
      uint32_t n = (uint32_t)(+h->decimal_point);
      uint32_t shift = (n < num_powers)
                           ? powers[n]
                           : WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL;

      wuffs_private_impl__high_prec_dec__small_rshift(h, shift);
      if (h->decimal_point < -WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE) {
        goto zero;
      }
      exp2 += (int32_t)shift;
    }
    // ...then we shift left while below 0.1.
    while (h->decimal_point < 0) {
      uint32_t shift;
      uint32_t n = (uint32_t)(-h->decimal_point);
      shift = (n < num_powers)
                  // The +1 is per "when targeting h->decimal_point being +0 or
                  // +1... when left shifting" in the powers comment above.
                  ? (powers[n] + 1u)
                  : WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL;

      wuffs_private_impl__high_prec_dec__small_lshift(h, shift);
      if (h->decimal_point > +WUFFS_PRIVATE_IMPL__HPD__DECIMAL_POINT__RANGE) {
        goto infinity;
      }
      exp2 -= (int32_t)shift;
    }

    // To get from "in the range [0.1 .. 10]" to "in the range [1 .. 2]" (which
    // will give us our exponent in base-2), the mantissa's first 3 digits will
    // determine the final left shift, equal to 52 (the number of explicit f64
    // bits) plus an additional adjustment.
    int man3 = (100 * h->digits[0]) +
               ((h->num_digits > 1) ? (10 * h->digits[1]) : 0) +
               ((h->num_digits > 2) ? h->digits[2] : 0);
    int32_t additional_lshift = 0;
    if (h->decimal_point == 0) {  // The value is in [0.1 .. 1].
      if (man3 < 125) {
        additional_lshift = +4;
      } else if (man3 < 250) {
        additional_lshift = +3;
      } else if (man3 < 500) {
        additional_lshift = +2;
      } else {
        additional_lshift = +1;
      }
    } else {  // The value is in [1 .. 10].
      if (man3 < 200) {
        additional_lshift = -0;
      } else if (man3 < 400) {
        additional_lshift = -1;
      } else if (man3 < 800) {
        additional_lshift = -2;
      } else {
        additional_lshift = -3;
      }
    }
    exp2 -= additional_lshift;
    uint32_t final_lshift = (uint32_t)(52 + additional_lshift);

    // The minimum normal exponent is (f64_bias + 1).
    while ((f64_bias + 1) > exp2) {
      uint32_t n = (uint32_t)((f64_bias + 1) - exp2);
      if (n > WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL) {
        n = WUFFS_PRIVATE_IMPL__HPD__SHIFT__MAX_INCL;
      }
      wuffs_private_impl__high_prec_dec__small_rshift(h, n);
      exp2 += (int32_t)n;
    }

    // Check for overflow.
    if ((exp2 - f64_bias) >= 0x07FF) {  // (1 << 11) - 1.
      goto infinity;
    }

    // Extract 53 bits for the mantissa (in base-2).
    wuffs_private_impl__high_prec_dec__small_lshift(h, final_lshift);
    uint64_t man2 = wuffs_private_impl__high_prec_dec__rounded_integer(h);

    // Rounding might have added one bit. If so, shift and re-check overflow.
    if ((man2 >> 53) != 0) {
      man2 >>= 1;
      exp2++;
      if ((exp2 - f64_bias) >= 0x07FF) {  // (1 << 11) - 1.
        goto infinity;
      }
    }

    // Handle subnormal numbers.
    if ((man2 >> 52) == 0) {
      exp2 = f64_bias;
    }

    // Pack the bits and return.
    uint64_t exp2_bits =
        (uint64_t)((exp2 - f64_bias) & 0x07FF);              // (1 << 11) - 1.
    uint64_t bits = (man2 & 0x000FFFFFFFFFFFFF) |            // (1 << 52) - 1.
                    (exp2_bits << 52) |                      //
                    (h->negative ? 0x8000000000000000 : 0);  // (1 << 63).

    wuffs_base__result_f64 ret;
    ret.status.repr = NULL;
    ret.value = wuffs_base__ieee_754_bit_representation__from_u64_to_f64(bits);
    return ret;
  } while (0);

zero:
  do {
    uint64_t bits = h->negative ? 0x8000000000000000 : 0;

    wuffs_base__result_f64 ret;
    ret.status.repr = NULL;
    ret.value = wuffs_base__ieee_754_bit_representation__from_u64_to_f64(bits);
    return ret;
  } while (0);

infinity:
  do {
    if (options & WUFFS_BASE__PARSE_NUMBER_FXX__REJECT_INF_AND_NAN) {
      wuffs_base__result_f64 ret;
      ret.status.repr = wuffs_base__error__bad_argument;
      ret.value = 0;
      return ret;
    }

    uint64_t bits = h->negative ? 0xFFF0000000000000 : 0x7FF0000000000000;

    wuffs_base__result_f64 ret;
    ret.status.repr = NULL;
    ret.value = wuffs_base__ieee_754_bit_representation__from_u64_to_f64(bits);
    return ret;
  } while (0);
}

static inline bool  //
wuffs_private_impl__is_decimal_digit(uint8_t c) {
  return ('0' <= c) && (c <= '9');
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__result_f64  //
wuffs_base__parse_number_f64(wuffs_base__slice_u8 s, uint32_t options) {
  // In practice, almost all "dd.ddddE±xxx" numbers can be represented
  // losslessly by a uint64_t mantissa "dddddd" and an int32_t base-10
  // exponent, adjusting "xxx" for the position (if present) of the decimal
  // separator '.' or ','.
  //
  // This (u64 man, i32 exp10) data structure is superficially similar to the
  // "Do It Yourself Floating Point" type from Loitsch (†), but the exponent
  // here is base-10, not base-2.
  //
  // If s's number fits in a (man, exp10), parse that pair with the
  // Eisel-Lemire algorithm. If not, or if Eisel-Lemire fails, parsing s with
  // the fallback algorithm is slower but comprehensive.
  //
  // † "Printing Floating-Point Numbers Quickly and Accurately with Integers"
  // (https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf).
  // Florian Loitsch is also the primary contributor to
  // https://github.com/google/double-conversion
  do {
    // Calculating that (man, exp10) pair needs to stay within s's bounds.
    // Provided that s isn't extremely long, work on a NUL-terminated copy of
    // s's contents. The NUL byte isn't a valid part of "±dd.ddddE±xxx".
    //
    // As the pointer p walks the contents, it's faster to repeatedly check "is
    // *p a valid digit" than "is p within bounds and *p a valid digit".
    if (s.len >= 256) {
      goto fallback;
    }
    uint8_t z[256];
    memcpy(&z[0], s.ptr, s.len);
    z[s.len] = 0;
    const uint8_t* p = &z[0];

    // Look for a leading minus sign. Technically, we could also look for an
    // optional plus sign, but the "script/process-json-numbers.c with -p"
    // benchmark is noticably slower if we do. It's optional and, in practice,
    // usually absent. Let the fallback catch it.
    bool negative = (*p == '-');
    if (negative) {
      p++;
    }

    // After walking "dd.dddd", comparing p later with p now will produce the
    // number of "d"s and "."s.
    const uint8_t* const start_of_digits_ptr = p;

    // Walk the "d"s before a '.', 'E', NUL byte, etc. If it starts with '0',
    // it must be a single '0'. If it starts with a non-zero decimal digit, it
    // can be a sequence of decimal digits.
    //
    // Update the man variable during the walk. It's OK if man overflows now.
    // We'll detect that later.
    uint64_t man;
    if (*p == '0') {
      man = 0;
      p++;
      if (wuffs_private_impl__is_decimal_digit(*p)) {
        goto fallback;
      }
    } else if (wuffs_private_impl__is_decimal_digit(*p)) {
      man = ((uint8_t)(*p - '0'));
      p++;
      for (; wuffs_private_impl__is_decimal_digit(*p); p++) {
        man = (10 * man) + ((uint8_t)(*p - '0'));
      }
    } else {
      goto fallback;
    }

    // Walk the "d"s after the optional decimal separator ('.' or ','),
    // updating the man and exp10 variables.
    int32_t exp10 = 0;
    if (*p ==
        ((options & WUFFS_BASE__PARSE_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA)
             ? ','
             : '.')) {
      p++;
      const uint8_t* first_after_separator_ptr = p;
      if (!wuffs_private_impl__is_decimal_digit(*p)) {
        goto fallback;
      }
      man = (10 * man) + ((uint8_t)(*p - '0'));
      p++;
      for (; wuffs_private_impl__is_decimal_digit(*p); p++) {
        man = (10 * man) + ((uint8_t)(*p - '0'));
      }
      exp10 = ((int32_t)(first_after_separator_ptr - p));
    }

    // Count the number of digits:
    //  - for an input of "314159",  digit_count is 6.
    //  - for an input of "3.14159", digit_count is 7.
    //
    // This is off-by-one if there is a decimal separator. That's OK for now.
    // We'll correct for that later. The "script/process-json-numbers.c with
    // -p" benchmark is noticably slower if we try to correct for that now.
    uint32_t digit_count = (uint32_t)(p - start_of_digits_ptr);

    // Update exp10 for the optional exponent, starting with 'E' or 'e'.
    if ((*p | 0x20) == 'e') {
      p++;
      int32_t exp_sign = +1;
      if (*p == '-') {
        p++;
        exp_sign = -1;
      } else if (*p == '+') {
        p++;
      }
      if (!wuffs_private_impl__is_decimal_digit(*p)) {
        goto fallback;
      }
      int32_t exp_num = ((uint8_t)(*p - '0'));
      p++;
      // The rest of the exp_num walking has a peculiar control flow but, once
      // again, the "script/process-json-numbers.c with -p" benchmark is
      // sensitive to alternative formulations.
      if (wuffs_private_impl__is_decimal_digit(*p)) {
        exp_num = (10 * exp_num) + ((uint8_t)(*p - '0'));
        p++;
      }
      if (wuffs_private_impl__is_decimal_digit(*p)) {
        exp_num = (10 * exp_num) + ((uint8_t)(*p - '0'));
        p++;
      }
      while (wuffs_private_impl__is_decimal_digit(*p)) {
        if (exp_num > 0x1000000) {
          goto fallback;
        }
        exp_num = (10 * exp_num) + ((uint8_t)(*p - '0'));
        p++;
      }
      exp10 += exp_sign * exp_num;
    }

    // The Wuffs API is that the original slice has no trailing data. It also
    // allows underscores, which we don't catch here but the fallback should.
    if (p != &z[s.len]) {
      goto fallback;
    }

    // Check that the uint64_t typed man variable has not overflowed, based on
    // digit_count.
    //
    // For reference:
    //   - (1 << 63) is  9223372036854775808, which has 19 decimal digits.
    //   - (1 << 64) is 18446744073709551616, which has 20 decimal digits.
    //   - 19 nines,  9999999999999999999, is  0x8AC7230489E7FFFF, which has 64
    //     bits and 16 hexadecimal digits.
    //   - 20 nines, 99999999999999999999, is 0x56BC75E2D630FFFFF, which has 67
    //     bits and 17 hexadecimal digits.
    if (digit_count > 19) {
      // Even if we have more than 19 pseudo-digits, it's not yet definitely an
      // overflow. Recall that digit_count might be off-by-one (too large) if
      // there's a decimal separator. It will also over-report the number of
      // meaningful digits if the input looks something like "0.000dddExxx".
      //
      // We adjust by the number of leading '0's and '.'s and re-compare to 19.
      // Once again, technically, we could skip ','s too, but that perturbs the
      // "script/process-json-numbers.c with -p" benchmark.
      const uint8_t* q = start_of_digits_ptr;
      for (; (*q == '0') || (*q == '.'); q++) {
      }
      digit_count -= (uint32_t)(q - start_of_digits_ptr);
      if (digit_count > 19) {
        goto fallback;
      }
    }

    // The wuffs_private_impl__parse_number_f64_eisel_lemire preconditions
    // include that exp10 is in the range [-307 ..= 288].
    if ((exp10 < -307) || (288 < exp10)) {
      goto fallback;
    }

    // If both man and (10 ** exp10) are exactly representable by a double, we
    // don't need to run the Eisel-Lemire algorithm.
    if ((-22 <= exp10) && (exp10 <= 22) && ((man >> 53) == 0)) {
      double d = (double)man;
      if (exp10 >= 0) {
        d *= wuffs_private_impl__f64_powers_of_10[+exp10];
      } else {
        d /= wuffs_private_impl__f64_powers_of_10[-exp10];
      }
      wuffs_base__result_f64 ret;
      ret.status.repr = NULL;
      ret.value = negative ? -d : +d;
      return ret;
    }

    // The wuffs_private_impl__parse_number_f64_eisel_lemire preconditions
    // include that man is non-zero. Parsing "0" should be caught by the "If
    // both man and (10 ** exp10)" above, but "0e99" might not.
    if (man == 0) {
      goto fallback;
    }

    // Our man and exp10 are in range. Run the Eisel-Lemire algorithm.
    int64_t r = wuffs_private_impl__parse_number_f64_eisel_lemire(man, exp10);
    if (r < 0) {
      goto fallback;
    }
    wuffs_base__result_f64 ret;
    ret.status.repr = NULL;
    ret.value = wuffs_base__ieee_754_bit_representation__from_u64_to_f64(
        ((uint64_t)r) | (((uint64_t)negative) << 63));
    return ret;
  } while (0);

fallback:
  do {
    wuffs_private_impl__high_prec_dec h;
    wuffs_base__status status =
        wuffs_private_impl__high_prec_dec__parse(&h, s, options);
    if (status.repr) {
      return wuffs_private_impl__parse_number_f64_special(s, options);
    }
    return wuffs_private_impl__high_prec_dec__to_f64(&h, options);
  } while (0);
}

// --------

static inline size_t  //
wuffs_private_impl__render_inf(wuffs_base__slice_u8 dst,
                               bool neg,
                               uint32_t options) {
  if (neg) {
    if (dst.len < 4) {
      return 0;
    }
    wuffs_base__poke_u32le__no_bounds_check(dst.ptr, 0x666E492D);  // '-Inf'le.
    return 4;
  }

  if (options & WUFFS_BASE__RENDER_NUMBER_XXX__LEADING_PLUS_SIGN) {
    if (dst.len < 4) {
      return 0;
    }
    wuffs_base__poke_u32le__no_bounds_check(dst.ptr, 0x666E492B);  // '+Inf'le.
    return 4;
  }

  if (dst.len < 3) {
    return 0;
  }
  wuffs_base__poke_u24le__no_bounds_check(dst.ptr, 0x666E49);  // 'Inf'le.
  return 3;
}

static inline size_t  //
wuffs_private_impl__render_nan(wuffs_base__slice_u8 dst) {
  if (dst.len < 3) {
    return 0;
  }
  wuffs_base__poke_u24le__no_bounds_check(dst.ptr, 0x4E614E);  // 'NaN'le.
  return 3;
}

static size_t  //
wuffs_private_impl__high_prec_dec__render_exponent_absent(
    wuffs_base__slice_u8 dst,
    wuffs_private_impl__high_prec_dec* h,
    uint32_t precision,
    uint32_t options) {
  size_t n = (h->negative ||
              (options & WUFFS_BASE__RENDER_NUMBER_XXX__LEADING_PLUS_SIGN))
                 ? 1
                 : 0;
  if (h->decimal_point <= 0) {
    n += 1;
  } else {
    n += (size_t)(h->decimal_point);
  }
  if (precision > 0) {
    n += precision + 1;  // +1 for the '.'.
  }

  // Don't modify dst if the formatted number won't fit.
  if (n > dst.len) {
    return 0;
  }

  // Align-left or align-right.
  uint8_t* ptr = (options & WUFFS_BASE__RENDER_NUMBER_XXX__ALIGN_RIGHT)
                     ? &dst.ptr[dst.len - n]
                     : &dst.ptr[0];

  // Leading "±".
  if (h->negative) {
    *ptr++ = '-';
  } else if (options & WUFFS_BASE__RENDER_NUMBER_XXX__LEADING_PLUS_SIGN) {
    *ptr++ = '+';
  }

  // Integral digits.
  if (h->decimal_point <= 0) {
    *ptr++ = '0';
  } else {
    uint32_t m =
        wuffs_base__u32__min(h->num_digits, (uint32_t)(h->decimal_point));
    uint32_t i = 0;
    for (; i < m; i++) {
      *ptr++ = (uint8_t)('0' | h->digits[i]);
    }
    for (; i < (uint32_t)(h->decimal_point); i++) {
      *ptr++ = '0';
    }
  }

  // Separator and then fractional digits.
  if (precision > 0) {
    *ptr++ =
        (options & WUFFS_BASE__RENDER_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA)
            ? ','
            : '.';
    uint32_t i = 0;
    for (; i < precision; i++) {
      uint32_t j = ((uint32_t)(h->decimal_point)) + i;
      *ptr++ = (uint8_t)('0' | ((j < h->num_digits) ? h->digits[j] : 0));
    }
  }

  return n;
}

static size_t  //
wuffs_private_impl__high_prec_dec__render_exponent_present(
    wuffs_base__slice_u8 dst,
    wuffs_private_impl__high_prec_dec* h,
    uint32_t precision,
    uint32_t options) {
  int32_t exp = 0;
  if (h->num_digits > 0) {
    exp = h->decimal_point - 1;
  }
  bool negative_exp = exp < 0;
  if (negative_exp) {
    exp = -exp;
  }

  size_t n = (h->negative ||
              (options & WUFFS_BASE__RENDER_NUMBER_XXX__LEADING_PLUS_SIGN))
                 ? 4
                 : 3;  // Mininum 3 bytes: first digit and then "e±".
  if (precision > 0) {
    n += precision + 1;  // +1 for the '.'.
  }
  n += (exp < 100) ? 2 : 3;

  // Don't modify dst if the formatted number won't fit.
  if (n > dst.len) {
    return 0;
  }

  // Align-left or align-right.
  uint8_t* ptr = (options & WUFFS_BASE__RENDER_NUMBER_XXX__ALIGN_RIGHT)
                     ? &dst.ptr[dst.len - n]
                     : &dst.ptr[0];

  // Leading "±".
  if (h->negative) {
    *ptr++ = '-';
  } else if (options & WUFFS_BASE__RENDER_NUMBER_XXX__LEADING_PLUS_SIGN) {
    *ptr++ = '+';
  }

  // Integral digit.
  if (h->num_digits > 0) {
    *ptr++ = (uint8_t)('0' | h->digits[0]);
  } else {
    *ptr++ = '0';
  }

  // Separator and then fractional digits.
  if (precision > 0) {
    *ptr++ =
        (options & WUFFS_BASE__RENDER_NUMBER_FXX__DECIMAL_SEPARATOR_IS_A_COMMA)
            ? ','
            : '.';
    uint32_t i = 1;
    uint32_t j = wuffs_base__u32__min(h->num_digits, precision + 1);
    for (; i < j; i++) {
      *ptr++ = (uint8_t)('0' | h->digits[i]);
    }
    for (; i <= precision; i++) {
      *ptr++ = '0';
    }
  }

  // Exponent: "e±" and then 2 or 3 digits.
  *ptr++ = 'e';
  *ptr++ = negative_exp ? '-' : '+';
  if (exp < 10) {
    *ptr++ = '0';
    *ptr++ = (uint8_t)('0' | exp);
  } else if (exp < 100) {
    *ptr++ = (uint8_t)('0' | (exp / 10));
    *ptr++ = (uint8_t)('0' | (exp % 10));
  } else {
    int32_t e = exp / 100;
    exp -= e * 100;
    *ptr++ = (uint8_t)('0' | e);
    *ptr++ = (uint8_t)('0' | (exp / 10));
    *ptr++ = (uint8_t)('0' | (exp % 10));
  }

  return n;
}

WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__render_number_f64(wuffs_base__slice_u8 dst,
                              double x,
                              uint32_t precision,
                              uint32_t options) {
  // Decompose x (64 bits) into negativity (1 bit), base-2 exponent (11 bits
  // with a -1023 bias) and mantissa (52 bits).
  uint64_t bits = wuffs_base__ieee_754_bit_representation__from_f64_to_u64(x);
  bool neg = (bits >> 63) != 0;
  int32_t exp2 = ((int32_t)(bits >> 52)) & 0x7FF;
  uint64_t man = bits & 0x000FFFFFFFFFFFFFul;

  // Apply the exponent bias and set the implicit top bit of the mantissa,
  // unless x is subnormal. Also take care of Inf and NaN.
  if (exp2 == 0x7FF) {
    if (man != 0) {
      return wuffs_private_impl__render_nan(dst);
    }
    return wuffs_private_impl__render_inf(dst, neg, options);
  } else if (exp2 == 0) {
    exp2 = -1022;
  } else {
    exp2 -= 1023;
    man |= 0x0010000000000000ul;
  }

  // Ensure that precision isn't too large.
  if (precision > 4095) {
    precision = 4095;
  }

  // Convert from the (neg, exp2, man) tuple to an HPD.
  wuffs_private_impl__high_prec_dec h;
  wuffs_private_impl__high_prec_dec__assign(&h, man, neg);
  if (h.num_digits > 0) {
    wuffs_private_impl__high_prec_dec__lshift(&h,
                                              exp2 - 52);  // 52 mantissa bits.
  }

  // Handle the "%e" and "%f" formats.
  switch (options & (WUFFS_BASE__RENDER_NUMBER_FXX__EXPONENT_ABSENT |
                     WUFFS_BASE__RENDER_NUMBER_FXX__EXPONENT_PRESENT)) {
    case WUFFS_BASE__RENDER_NUMBER_FXX__EXPONENT_ABSENT:  // The "%"f" format.
      if (options & WUFFS_BASE__RENDER_NUMBER_FXX__JUST_ENOUGH_PRECISION) {
        wuffs_private_impl__high_prec_dec__round_just_enough(&h, exp2, man);
        int32_t p = ((int32_t)(h.num_digits)) - h.decimal_point;
        precision = ((uint32_t)(wuffs_base__i32__max(0, p)));
      } else {
        wuffs_private_impl__high_prec_dec__round_nearest(
            &h, ((int32_t)precision) + h.decimal_point);
      }
      return wuffs_private_impl__high_prec_dec__render_exponent_absent(
          dst, &h, precision, options);

    case WUFFS_BASE__RENDER_NUMBER_FXX__EXPONENT_PRESENT:  // The "%e" format.
      if (options & WUFFS_BASE__RENDER_NUMBER_FXX__JUST_ENOUGH_PRECISION) {
        wuffs_private_impl__high_prec_dec__round_just_enough(&h, exp2, man);
        precision = (h.num_digits > 0) ? (h.num_digits - 1) : 0;
      } else {
        wuffs_private_impl__high_prec_dec__round_nearest(
            &h, ((int32_t)precision) + 1);
      }
      return wuffs_private_impl__high_prec_dec__render_exponent_present(
          dst, &h, precision, options);
  }

  // We have the "%g" format and so precision means the number of significant
  // digits, not the number of digits after the decimal separator. Perform
  // rounding and determine whether to use "%e" or "%f".
  int32_t e_threshold = 0;
  if (options & WUFFS_BASE__RENDER_NUMBER_FXX__JUST_ENOUGH_PRECISION) {
    wuffs_private_impl__high_prec_dec__round_just_enough(&h, exp2, man);
    precision = h.num_digits;
    e_threshold = 6;
  } else {
    if (precision == 0) {
      precision = 1;
    }
    wuffs_private_impl__high_prec_dec__round_nearest(&h, ((int32_t)precision));
    e_threshold = ((int32_t)precision);
    int32_t nd = ((int32_t)(h.num_digits));
    if ((e_threshold > nd) && (nd >= h.decimal_point)) {
      e_threshold = nd;
    }
  }

  // Use the "%e" format if the exponent is large.
  int32_t e = h.decimal_point - 1;
  if ((e < -4) || (e_threshold <= e)) {
    uint32_t p = wuffs_base__u32__min(precision, h.num_digits);
    return wuffs_private_impl__high_prec_dec__render_exponent_present(
        dst, &h, (p > 0) ? (p - 1) : 0, options);
  }

  // Use the "%f" format otherwise.
  int32_t p = ((int32_t)precision);
  if (p > h.decimal_point) {
    p = ((int32_t)(h.num_digits));
  }
  precision = ((uint32_t)(wuffs_base__i32__max(0, p - h.decimal_point)));
  return wuffs_private_impl__high_prec_dec__render_exponent_absent(
      dst, &h, precision, options);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__BASE) ||
        // defined(WUFFS_CONFIG__MODULE__BASE__FLOATCONV)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE) || \
    defined(WUFFS_CONFIG__MODULE__BASE__INTCONV)

// ---------------- Integer

// wuffs_base__parse_number__foo_digits entries are 0x00 for invalid digits,
// and (0x80 | v) for valid digits, where v is the 4 bit value.

static const uint8_t wuffs_base__parse_number__decimal_digits[256] = {
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x00 ..= 0x07.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x08 ..= 0x0F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x10 ..= 0x17.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x18 ..= 0x1F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x20 ..= 0x27.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x28 ..= 0x2F.
    0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,  // 0x30 ..= 0x37. '0'-'7'.
    0x88, 0x89, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x38 ..= 0x3F. '8'-'9'.

    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x40 ..= 0x47.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x48 ..= 0x4F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x50 ..= 0x57.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x58 ..= 0x5F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x60 ..= 0x67.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x68 ..= 0x6F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x70 ..= 0x77.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x78 ..= 0x7F.

    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x80 ..= 0x87.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x88 ..= 0x8F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x90 ..= 0x97.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x98 ..= 0x9F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xA0 ..= 0xA7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xA8 ..= 0xAF.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xB0 ..= 0xB7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xB8 ..= 0xBF.

    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xC0 ..= 0xC7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xC8 ..= 0xCF.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xD0 ..= 0xD7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xD8 ..= 0xDF.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xE0 ..= 0xE7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xE8 ..= 0xEF.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xF0 ..= 0xF7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xF8 ..= 0xFF.
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
};

static const uint8_t wuffs_base__parse_number__hexadecimal_digits[256] = {
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x00 ..= 0x07.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x08 ..= 0x0F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x10 ..= 0x17.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x18 ..= 0x1F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x20 ..= 0x27.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x28 ..= 0x2F.
    0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,  // 0x30 ..= 0x37. '0'-'7'.
    0x88, 0x89, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x38 ..= 0x3F. '8'-'9'.

    0x00, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x00,  // 0x40 ..= 0x47. 'A'-'F'.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x48 ..= 0x4F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x50 ..= 0x57.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x58 ..= 0x5F.
    0x00, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x00,  // 0x60 ..= 0x67. 'a'-'f'.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x68 ..= 0x6F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x70 ..= 0x77.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x78 ..= 0x7F.

    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x80 ..= 0x87.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x88 ..= 0x8F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x90 ..= 0x97.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x98 ..= 0x9F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xA0 ..= 0xA7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xA8 ..= 0xAF.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xB0 ..= 0xB7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xB8 ..= 0xBF.

    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xC0 ..= 0xC7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xC8 ..= 0xCF.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xD0 ..= 0xD7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xD8 ..= 0xDF.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xE0 ..= 0xE7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xE8 ..= 0xEF.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xF0 ..= 0xF7.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0xF8 ..= 0xFF.
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
};

static const uint8_t wuffs_private_impl__encode_base16[16] = {
    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,  // 0x00 ..= 0x07.
    0x38, 0x39, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46,  // 0x08 ..= 0x0F.
};

// --------

WUFFS_BASE__MAYBE_STATIC wuffs_base__result_i64  //
wuffs_base__parse_number_i64(wuffs_base__slice_u8 s, uint32_t options) {
  uint8_t* p = s.ptr;
  uint8_t* q = s.ptr + s.len;

  if (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES) {
    for (; (p < q) && (*p == '_'); p++) {
    }
  }

  bool negative = false;
  if (p >= q) {
    goto fail_bad_argument;
  } else if (*p == '-') {
    p++;
    negative = true;
  } else if (*p == '+') {
    p++;
  }

  do {
    wuffs_base__result_u64 r = wuffs_base__parse_number_u64(
        wuffs_base__make_slice_u8(p, (size_t)(q - p)), options);
    if (r.status.repr != NULL) {
      wuffs_base__result_i64 ret;
      ret.status.repr = r.status.repr;
      ret.value = 0;
      return ret;
    } else if (negative) {
      if (r.value < 0x8000000000000000) {
        wuffs_base__result_i64 ret;
        ret.status.repr = NULL;
        ret.value = -(int64_t)(r.value);
        return ret;
      } else if (r.value == 0x8000000000000000) {
        wuffs_base__result_i64 ret;
        ret.status.repr = NULL;
        ret.value = INT64_MIN;
        return ret;
      }
      goto fail_out_of_bounds;
    } else if (r.value > 0x7FFFFFFFFFFFFFFF) {
      goto fail_out_of_bounds;
    } else {
      wuffs_base__result_i64 ret;
      ret.status.repr = NULL;
      ret.value = +(int64_t)(r.value);
      return ret;
    }
  } while (0);

fail_bad_argument:
  do {
    wuffs_base__result_i64 ret;
    ret.status.repr = wuffs_base__error__bad_argument;
    ret.value = 0;
    return ret;
  } while (0);

fail_out_of_bounds:
  do {
    wuffs_base__result_i64 ret;
    ret.status.repr = wuffs_base__error__out_of_bounds;
    ret.value = 0;
    return ret;
  } while (0);
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__result_u64  //
wuffs_base__parse_number_u64(wuffs_base__slice_u8 s, uint32_t options) {
  uint8_t* p = s.ptr;
  uint8_t* q = s.ptr + s.len;

  if (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES) {
    for (; (p < q) && (*p == '_'); p++) {
    }
  }

  if (p >= q) {
    goto fail_bad_argument;

  } else if (*p == '0') {
    p++;
    if (p >= q) {
      goto ok_zero;
    }
    if (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES) {
      if (*p == '_') {
        p++;
        for (; p < q; p++) {
          if (*p != '_') {
            if (options &
                WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_MULTIPLE_LEADING_ZEROES) {
              goto decimal;
            }
            goto fail_bad_argument;
          }
        }
        goto ok_zero;
      }
    }

    if ((*p == 'x') || (*p == 'X')) {
      p++;
      if (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES) {
        for (; (p < q) && (*p == '_'); p++) {
        }
      }
      if (p < q) {
        goto hexadecimal;
      }

    } else if ((*p == 'd') || (*p == 'D')) {
      p++;
      if (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES) {
        for (; (p < q) && (*p == '_'); p++) {
        }
      }
      if (p < q) {
        goto decimal;
      }
    }

    if (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_MULTIPLE_LEADING_ZEROES) {
      goto decimal;
    }
    goto fail_bad_argument;
  }

decimal:
  do {
    uint64_t v = wuffs_base__parse_number__decimal_digits[*p++];
    if (v == 0) {
      goto fail_bad_argument;
    }
    v &= 0x0F;

    // UINT64_MAX is 18446744073709551615, which is ((10 * max10) + max1).
    const uint64_t max10 = 1844674407370955161u;
    const uint8_t max1 = 5;

    for (; p < q; p++) {
      if ((*p == '_') &&
          (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES)) {
        continue;
      }
      uint8_t digit = wuffs_base__parse_number__decimal_digits[*p];
      if (digit == 0) {
        goto fail_bad_argument;
      }
      digit &= 0x0F;
      if ((v > max10) || ((v == max10) && (digit > max1))) {
        goto fail_out_of_bounds;
      }
      v = (10 * v) + ((uint64_t)(digit));
    }

    wuffs_base__result_u64 ret;
    ret.status.repr = NULL;
    ret.value = v;
    return ret;
  } while (0);

hexadecimal:
  do {
    uint64_t v = wuffs_base__parse_number__hexadecimal_digits[*p++];
    if (v == 0) {
      goto fail_bad_argument;
    }
    v &= 0x0F;

    for (; p < q; p++) {
      if ((*p == '_') &&
          (options & WUFFS_BASE__PARSE_NUMBER_XXX__ALLOW_UNDERSCORES)) {
        continue;
      }
      uint8_t digit = wuffs_base__parse_number__hexadecimal_digits[*p];
      if (digit == 0) {
        goto fail_bad_argument;
      }
      digit &= 0x0F;
      if ((v >> 60) != 0) {
        goto fail_out_of_bounds;
      }
      v = (v << 4) | ((uint64_t)(digit));
    }

    wuffs_base__result_u64 ret;
    ret.status.repr = NULL;
    ret.value = v;
    return ret;
  } while (0);

ok_zero:
  do {
    wuffs_base__result_u64 ret;
    ret.status.repr = NULL;
    ret.value = 0;
    return ret;
  } while (0);

fail_bad_argument:
  do {
    wuffs_base__result_u64 ret;
    ret.status.repr = wuffs_base__error__bad_argument;
    ret.value = 0;
    return ret;
  } while (0);

fail_out_of_bounds:
  do {
    wuffs_base__result_u64 ret;
    ret.status.repr = wuffs_base__error__out_of_bounds;
    ret.value = 0;
    return ret;
  } while (0);
}

// --------

// wuffs_base__render_number__first_hundred contains the decimal encodings of
// the first one hundred numbers [0 ..= 99].
static const uint8_t wuffs_base__render_number__first_hundred[200] = {
    '0', '0', '0', '1', '0', '2', '0', '3', '0', '4',  //
    '0', '5', '0', '6', '0', '7', '0', '8', '0', '9',  //
    '1', '0', '1', '1', '1', '2', '1', '3', '1', '4',  //
    '1', '5', '1', '6', '1', '7', '1', '8', '1', '9',  //
    '2', '0', '2', '1', '2', '2', '2', '3', '2', '4',  //
    '2', '5', '2', '6', '2', '7', '2', '8', '2', '9',  //
    '3', '0', '3', '1', '3', '2', '3', '3', '3', '4',  //
    '3', '5', '3', '6', '3', '7', '3', '8', '3', '9',  //
    '4', '0', '4', '1', '4', '2', '4', '3', '4', '4',  //
    '4', '5', '4', '6', '4', '7', '4', '8', '4', '9',  //
    '5', '0', '5', '1', '5', '2', '5', '3', '5', '4',  //
    '5', '5', '5', '6', '5', '7', '5', '8', '5', '9',  //
    '6', '0', '6', '1', '6', '2', '6', '3', '6', '4',  //
    '6', '5', '6', '6', '6', '7', '6', '8', '6', '9',  //
    '7', '0', '7', '1', '7', '2', '7', '3', '7', '4',  //
    '7', '5', '7', '6', '7', '7', '7', '8', '7', '9',  //
    '8', '0', '8', '1', '8', '2', '8', '3', '8', '4',  //
    '8', '5', '8', '6', '8', '7', '8', '8', '8', '9',  //
    '9', '0', '9', '1', '9', '2', '9', '3', '9', '4',  //
    '9', '5', '9', '6', '9', '7', '9', '8', '9', '9',  //
};

static size_t  //
wuffs_private_impl__render_number_u64(wuffs_base__slice_u8 dst,
                                      uint64_t x,
                                      uint32_t options,
                                      bool neg) {
  uint8_t buf[WUFFS_BASE__U64__BYTE_LENGTH__MAX_INCL];
  uint8_t* ptr = &buf[0] + sizeof(buf);

  while (x >= 100) {
    size_t index = ((size_t)((x % 100) * 2));
    x /= 100;
    uint8_t s0 = wuffs_base__render_number__first_hundred[index + 0];
    uint8_t s1 = wuffs_base__render_number__first_hundred[index + 1];
    ptr -= 2;
    ptr[0] = s0;
    ptr[1] = s1;
  }

  if (x < 10) {
    ptr -= 1;
    ptr[0] = (uint8_t)('0' + x);
  } else {
    size_t index = ((size_t)(x * 2));
    uint8_t s0 = wuffs_base__render_number__first_hundred[index + 0];
    uint8_t s1 = wuffs_base__render_number__first_hundred[index + 1];
    ptr -= 2;
    ptr[0] = s0;
    ptr[1] = s1;
  }

  if (neg) {
    ptr -= 1;
    ptr[0] = '-';
  } else if (options & WUFFS_BASE__RENDER_NUMBER_XXX__LEADING_PLUS_SIGN) {
    ptr -= 1;
    ptr[0] = '+';
  }

  size_t n = sizeof(buf) - ((size_t)(ptr - &buf[0]));
  if (n > dst.len) {
    return 0;
  }
  memcpy(dst.ptr + ((options & WUFFS_BASE__RENDER_NUMBER_XXX__ALIGN_RIGHT)
                        ? (dst.len - n)
                        : 0),
         ptr, n);
  return n;
}

WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__render_number_i64(wuffs_base__slice_u8 dst,
                              int64_t x,
                              uint32_t options) {
  uint64_t u = (uint64_t)x;
  bool neg = x < 0;
  if (neg) {
    u = 1 + ~u;
  }
  return wuffs_private_impl__render_number_u64(dst, u, options, neg);
}

WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__render_number_u64(wuffs_base__slice_u8 dst,
                              uint64_t x,
                              uint32_t options) {
  return wuffs_private_impl__render_number_u64(dst, x, options, false);
}

// ---------------- Base-16

WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_16__decode2(wuffs_base__slice_u8 dst,
                             wuffs_base__slice_u8 src,
                             bool src_closed,
                             uint32_t options) {
  wuffs_base__transform__output o;
  size_t src_len2 = src.len / 2;
  size_t len;
  if (dst.len < src_len2) {
    len = dst.len;
    o.status.repr = wuffs_base__suspension__short_write;
  } else {
    len = src_len2;
    if (!src_closed) {
      o.status.repr = wuffs_base__suspension__short_read;
    } else if (src.len & 1) {
      o.status.repr = wuffs_base__error__bad_data;
    } else {
      o.status.repr = NULL;
    }
  }

  uint8_t* d = dst.ptr;
  uint8_t* s = src.ptr;
  size_t n = len;

  while (n--) {
    *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[0]] << 4) |
                   (wuffs_base__parse_number__hexadecimal_digits[s[1]] & 0x0F));
    d += 1;
    s += 2;
  }

  o.num_dst = len;
  o.num_src = len * 2;
  return o;
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_16__decode4(wuffs_base__slice_u8 dst,
                             wuffs_base__slice_u8 src,
                             bool src_closed,
                             uint32_t options) {
  wuffs_base__transform__output o;
  size_t src_len4 = src.len / 4;
  size_t len = dst.len < src_len4 ? dst.len : src_len4;
  if (dst.len < src_len4) {
    len = dst.len;
    o.status.repr = wuffs_base__suspension__short_write;
  } else {
    len = src_len4;
    if (!src_closed) {
      o.status.repr = wuffs_base__suspension__short_read;
    } else if (src.len & 1) {
      o.status.repr = wuffs_base__error__bad_data;
    } else {
      o.status.repr = NULL;
    }
  }

  uint8_t* d = dst.ptr;
  uint8_t* s = src.ptr;
  size_t n = len;

  while (n--) {
    *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[2]] << 4) |
                   (wuffs_base__parse_number__hexadecimal_digits[s[3]] & 0x0F));
    d += 1;
    s += 4;
  }

  o.num_dst = len;
  o.num_src = len * 4;
  return o;
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_16__encode2(wuffs_base__slice_u8 dst,
                             wuffs_base__slice_u8 src,
                             bool src_closed,
                             uint32_t options) {
  wuffs_base__transform__output o;
  size_t dst_len2 = dst.len / 2;
  size_t len;
  if (dst_len2 < src.len) {
    len = dst_len2;
    o.status.repr = wuffs_base__suspension__short_write;
  } else {
    len = src.len;
    if (!src_closed) {
      o.status.repr = wuffs_base__suspension__short_read;
    } else {
      o.status.repr = NULL;
    }
  }

  uint8_t* d = dst.ptr;
  uint8_t* s = src.ptr;
  size_t n = len;

  while (n--) {
    uint8_t c = *s;
    d[0] = wuffs_private_impl__encode_base16[c >> 4];
    d[1] = wuffs_private_impl__encode_base16[c & 0x0F];
    d += 2;
    s += 1;
  }

  o.num_dst = len * 2;
  o.num_src = len;
  return o;
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_16__encode4(wuffs_base__slice_u8 dst,
                             wuffs_base__slice_u8 src,
                             bool src_closed,
                             uint32_t options) {
  wuffs_base__transform__output o;
  size_t dst_len4 = dst.len / 4;
  size_t len;
  if (dst_len4 < src.len) {
    len = dst_len4;
    o.status.repr = wuffs_base__suspension__short_write;
  } else {
    len = src.len;
    if (!src_closed) {
      o.status.repr = wuffs_base__suspension__short_read;
    } else {
      o.status.repr = NULL;
    }
  }

  uint8_t* d = dst.ptr;
  uint8_t* s = src.ptr;
  size_t n = len;

  while (n--) {
    uint8_t c = *s;
    d[0] = '\\';
    d[1] = 'x';
    d[2] = wuffs_private_impl__encode_base16[c >> 4];
    d[3] = wuffs_private_impl__encode_base16[c & 0x0F];
    d += 4;
    s += 1;
  }

  o.num_dst = len * 4;
  o.num_src = len;
  return o;
}

// ---------------- Base-64

// The two base-64 alphabets, std and url, differ only in the last two codes.
//  - std: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
//  - url: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"

static const uint8_t wuffs_base__base_64__decode_std[256] = {
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x00 ..= 0x07.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x08 ..= 0x0F.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x10 ..= 0x17.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x18 ..= 0x1F.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x20 ..= 0x27.
    0x80, 0x80, 0x80, 0x3E, 0x80, 0x80, 0x80, 0x3F,  // 0x28 ..= 0x2F.
    0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,  // 0x30 ..= 0x37.
    0x3C, 0x3D, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x38 ..= 0x3F.

    0x80, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,  // 0x40 ..= 0x47.
    0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,  // 0x48 ..= 0x4F.
    0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,  // 0x50 ..= 0x57.
    0x17, 0x18, 0x19, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x58 ..= 0x5F.
    0x80, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,  // 0x60 ..= 0x67.
    0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,  // 0x68 ..= 0x6F.
    0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,  // 0x70 ..= 0x77.
    0x31, 0x32, 0x33, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x78 ..= 0x7F.

    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x80 ..= 0x87.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x88 ..= 0x8F.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x90 ..= 0x97.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x98 ..= 0x9F.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xA0 ..= 0xA7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xA8 ..= 0xAF.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xB0 ..= 0xB7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xB8 ..= 0xBF.

    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xC0 ..= 0xC7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xC8 ..= 0xCF.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xD0 ..= 0xD7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xD8 ..= 0xDF.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xE0 ..= 0xE7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xE8 ..= 0xEF.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xF0 ..= 0xF7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xF8 ..= 0xFF.
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
};

static const uint8_t wuffs_base__base_64__decode_url[256] = {
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x00 ..= 0x07.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x08 ..= 0x0F.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x10 ..= 0x17.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x18 ..= 0x1F.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x20 ..= 0x27.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x3E, 0x80, 0x80,  // 0x28 ..= 0x2F.
    0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,  // 0x30 ..= 0x37.
    0x3C, 0x3D, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x38 ..= 0x3F.

    0x80, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,  // 0x40 ..= 0x47.
    0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,  // 0x48 ..= 0x4F.
    0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,  // 0x50 ..= 0x57.
    0x17, 0x18, 0x19, 0x80, 0x80, 0x80, 0x80, 0x3F,  // 0x58 ..= 0x5F.
    0x80, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,  // 0x60 ..= 0x67.
    0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,  // 0x68 ..= 0x6F.
    0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,  // 0x70 ..= 0x77.
    0x31, 0x32, 0x33, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x78 ..= 0x7F.

    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x80 ..= 0x87.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x88 ..= 0x8F.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x90 ..= 0x97.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0x98 ..= 0x9F.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xA0 ..= 0xA7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xA8 ..= 0xAF.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xB0 ..= 0xB7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xB8 ..= 0xBF.

    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xC0 ..= 0xC7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xC8 ..= 0xCF.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xD0 ..= 0xD7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xD8 ..= 0xDF.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xE0 ..= 0xE7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xE8 ..= 0xEF.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xF0 ..= 0xF7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xF8 ..= 0xFF.
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
};

static const uint8_t wuffs_base__base_64__encode_std[64] = {
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
    0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,  // 0x00 ..= 0x07.
    0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,  // 0x08 ..= 0x0F.
    0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,  // 0x10 ..= 0x17.
    0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,  // 0x18 ..= 0x1F.
    0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E,  // 0x20 ..= 0x27.
    0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76,  // 0x28 ..= 0x2F.
    0x77, 0x78, 0x79, 0x7A, 0x30, 0x31, 0x32, 0x33,  // 0x30 ..= 0x37.
    0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x2B, 0x2F,  // 0x38 ..= 0x3F.
};

static const uint8_t wuffs_base__base_64__encode_url[64] = {
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
    0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,  // 0x00 ..= 0x07.
    0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50,  // 0x08 ..= 0x0F.
    0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,  // 0x10 ..= 0x17.
    0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,  // 0x18 ..= 0x1F.
    0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E,  // 0x20 ..= 0x27.
    0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76,  // 0x28 ..= 0x2F.
    0x77, 0x78, 0x79, 0x7A, 0x30, 0x31, 0x32, 0x33,  // 0x30 ..= 0x37.
    0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x2D, 0x5F,  // 0x38 ..= 0x3F.
};

// --------

WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_64__decode(wuffs_base__slice_u8 dst,
                            wuffs_base__slice_u8 src,
                            bool src_closed,
                            uint32_t options) {
  const uint8_t* alphabet = (options & WUFFS_BASE__BASE_64__URL_ALPHABET)
                                ? wuffs_base__base_64__decode_url
                                : wuffs_base__base_64__decode_std;
  wuffs_base__transform__output o;
  uint8_t* d_ptr = dst.ptr;
  size_t d_len = dst.len;
  const uint8_t* s_ptr = src.ptr;
  size_t s_len = src.len;
  bool pad = false;

  while (s_len >= 4) {
    uint32_t s = wuffs_base__peek_u32le__no_bounds_check(s_ptr);
    uint32_t s0 = alphabet[0xFF & (s >> 0)];
    uint32_t s1 = alphabet[0xFF & (s >> 8)];
    uint32_t s2 = alphabet[0xFF & (s >> 16)];
    uint32_t s3 = alphabet[0xFF & (s >> 24)];

    if (((s0 | s1 | s2 | s3) & 0xC0) != 0) {
      if (s_len > 4) {
        o.status.repr = wuffs_base__error__bad_data;
        goto done;
      } else if (!src_closed) {
        o.status.repr = wuffs_base__suspension__short_read;
        goto done;
      } else if ((options & WUFFS_BASE__BASE_64__DECODE_ALLOW_PADDING) &&
                 (s_ptr[3] == '=')) {
        pad = true;
        if (s_ptr[2] == '=') {
          goto src2;
        }
        goto src3;
      }
      o.status.repr = wuffs_base__error__bad_data;
      goto done;
    }

    if (d_len < 3) {
      o.status.repr = wuffs_base__suspension__short_write;
      goto done;
    }

    s_ptr += 4;
    s_len -= 4;
    s = (s0 << 18) | (s1 << 12) | (s2 << 6) | (s3 << 0);
    *d_ptr++ = (uint8_t)(s >> 16);
    *d_ptr++ = (uint8_t)(s >> 8);
    *d_ptr++ = (uint8_t)(s >> 0);
    d_len -= 3;
  }

  if (!src_closed) {
    o.status.repr = wuffs_base__suspension__short_read;
    goto done;
  }

  if (s_len == 0) {
    o.status.repr = NULL;
    goto done;
  } else if (s_len == 1) {
    o.status.repr = wuffs_base__error__bad_data;
    goto done;
  } else if (s_len == 2) {
    goto src2;
  }

src3:
  do {
    uint32_t s = wuffs_base__peek_u24le__no_bounds_check(s_ptr);
    uint32_t s0 = alphabet[0xFF & (s >> 0)];
    uint32_t s1 = alphabet[0xFF & (s >> 8)];
    uint32_t s2 = alphabet[0xFF & (s >> 16)];
    if ((s0 & 0xC0) || (s1 & 0xC0) || (s2 & 0xC3)) {
      o.status.repr = wuffs_base__error__bad_data;
      goto done;
    }
    if (d_len < 2) {
      o.status.repr = wuffs_base__suspension__short_write;
      goto done;
    }
    s_ptr += pad ? 4 : 3;
    s = (s0 << 18) | (s1 << 12) | (s2 << 6);
    *d_ptr++ = (uint8_t)(s >> 16);
    *d_ptr++ = (uint8_t)(s >> 8);
    o.status.repr = NULL;
    goto done;
  } while (0);

src2:
  do {
    uint32_t s = wuffs_base__peek_u16le__no_bounds_check(s_ptr);
    uint32_t s0 = alphabet[0xFF & (s >> 0)];
    uint32_t s1 = alphabet[0xFF & (s >> 8)];
    if ((s0 & 0xC0) || (s1 & 0xCF)) {
      o.status.repr = wuffs_base__error__bad_data;
      goto done;
    }
    if (d_len < 1) {
      o.status.repr = wuffs_base__suspension__short_write;
      goto done;
    }
    s_ptr += pad ? 4 : 2;
    s = (s0 << 18) | (s1 << 12);
    *d_ptr++ = (uint8_t)(s >> 16);
    o.status.repr = NULL;
    goto done;
  } while (0);

done:
  o.num_dst = (size_t)(d_ptr - dst.ptr);
  o.num_src = (size_t)(s_ptr - src.ptr);
  return o;
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__transform__output  //
wuffs_base__base_64__encode(wuffs_base__slice_u8 dst,
                            wuffs_base__slice_u8 src,
                            bool src_closed,
                            uint32_t options) {
  const uint8_t* alphabet = (options & WUFFS_BASE__BASE_64__URL_ALPHABET)
                                ? wuffs_base__base_64__encode_url
                                : wuffs_base__base_64__encode_std;
  wuffs_base__transform__output o;
  uint8_t* d_ptr = dst.ptr;
  size_t d_len = dst.len;
  const uint8_t* s_ptr = src.ptr;
  size_t s_len = src.len;

  do {
    while (s_len >= 3) {
      if (d_len < 4) {
        o.status.repr = wuffs_base__suspension__short_write;
        goto done;
      }
      uint32_t s = wuffs_base__peek_u24be__no_bounds_check(s_ptr);
      s_ptr += 3;
      s_len -= 3;
      *d_ptr++ = alphabet[0x3F & (s >> 18)];
      *d_ptr++ = alphabet[0x3F & (s >> 12)];
      *d_ptr++ = alphabet[0x3F & (s >> 6)];
      *d_ptr++ = alphabet[0x3F & (s >> 0)];
      d_len -= 4;
    }

    if (!src_closed) {
      o.status.repr = wuffs_base__suspension__short_read;
      goto done;
    }

    if (s_len == 2) {
      if (d_len <
          ((options & WUFFS_BASE__BASE_64__ENCODE_EMIT_PADDING) ? 4 : 3)) {
        o.status.repr = wuffs_base__suspension__short_write;
        goto done;
      }
      uint32_t s = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(s_ptr)))
                   << 8;
      s_ptr += 2;
      *d_ptr++ = alphabet[0x3F & (s >> 18)];
      *d_ptr++ = alphabet[0x3F & (s >> 12)];
      *d_ptr++ = alphabet[0x3F & (s >> 6)];
      if (options & WUFFS_BASE__BASE_64__ENCODE_EMIT_PADDING) {
        *d_ptr++ = '=';
      }
      o.status.repr = NULL;
      goto done;

    } else if (s_len == 1) {
      if (d_len <
          ((options & WUFFS_BASE__BASE_64__ENCODE_EMIT_PADDING) ? 4 : 2)) {
        o.status.repr = wuffs_base__suspension__short_write;
        goto done;
      }
      uint32_t s = ((uint32_t)(wuffs_base__peek_u8__no_bounds_check(s_ptr)))
                   << 16;
      s_ptr += 1;
      *d_ptr++ = alphabet[0x3F & (s >> 18)];
      *d_ptr++ = alphabet[0x3F & (s >> 12)];
      if (options & WUFFS_BASE__BASE_64__ENCODE_EMIT_PADDING) {
        *d_ptr++ = '=';
        *d_ptr++ = '=';
      }
      o.status.repr = NULL;
      goto done;

    } else {
      o.status.repr = NULL;
      goto done;
    }
  } while (0);

done:
  o.num_dst = (size_t)(d_ptr - dst.ptr);
  o.num_src = (size_t)(s_ptr - src.ptr);
  return o;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__BASE) ||
        // defined(WUFFS_CONFIG__MODULE__BASE__INTCONV)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE) || \
    defined(WUFFS_CONFIG__MODULE__BASE__MAGIC)

// ---------------- Magic Numbers

// ICO doesn't start with a magic identifier. Instead, see if the opening bytes
// are plausibly ICO.
//
// Callers should have already verified that (prefix_data.len >= 2) and the
// first two bytes are 0x00.
//
// See:
//  - https://docs.fileformat.com/image/ico/
static int32_t  //
wuffs_base__magic_number_guess_fourcc__maybe_ico(
    wuffs_base__slice_u8 prefix_data,
    bool prefix_closed) {
  // Allow-list for the Image Type field.
  if (prefix_data.len < 4) {
    return prefix_closed ? 0 : -1;
  } else if (prefix_data.ptr[3] != 0) {
    return 0;
  }
  switch (prefix_data.ptr[2]) {
    case 0x01:  // ICO
    case 0x02:  // CUR
      break;
    default:
      return 0;
  }

  // The Number Of Images should be positive.
  if (prefix_data.len < 6) {
    return prefix_closed ? 0 : -1;
  } else if ((prefix_data.ptr[4] == 0) && (prefix_data.ptr[5] == 0)) {
    return 0;
  }

  // The first ICONDIRENTRY's fourth byte should be zero.
  if (prefix_data.len < 10) {
    return prefix_closed ? 0 : -1;
  } else if (prefix_data.ptr[9] != 0) {
    return 0;
  }

  // TODO: have a separate FourCC for CUR?
  return 0x49434F20;  // 'ICO 'be
}

// TGA doesn't start with a magic identifier. Instead, see if the opening bytes
// are plausibly TGA.
//
// Callers should have already verified that (prefix_data.len >= 2) and the
// second byte (prefix_data.ptr[1], the Color Map Type byte), is either 0x00 or
// 0x01.
//
// See:
//  - https://docs.fileformat.com/image/tga/
//  - https://www.dca.fee.unicamp.br/~martino/disciplinas/ea978/tgaffs.pdf
static int32_t  //
wuffs_base__magic_number_guess_fourcc__maybe_tga(
    wuffs_base__slice_u8 prefix_data,
    bool prefix_closed) {
  // Allow-list for the Image Type field.
  if (prefix_data.len < 3) {
    return prefix_closed ? 0 : -1;
  }
  switch (prefix_data.ptr[2]) {
    case 0x01:
    case 0x02:
    case 0x03:
    case 0x09:
    case 0x0A:
    case 0x0B:
      break;
    default:
      // TODO: 0x20 and 0x21 are invalid, according to the spec, but are
      // apparently unofficial extensions.
      return 0;
  }

  // Allow-list for the Color Map Entry Size field (if the Color Map Type field
  // is non-zero) or else all the Color Map fields should be zero.
  if (prefix_data.len < 8) {
    return prefix_closed ? 0 : -1;
  } else if (prefix_data.ptr[1] != 0x00) {
    switch (prefix_data.ptr[7]) {
      case 0x0F:
      case 0x10:
      case 0x18:
      case 0x20:
        break;
      default:
        return 0;
    }
  } else if ((prefix_data.ptr[3] | prefix_data.ptr[4] | prefix_data.ptr[5] |
              prefix_data.ptr[6] | prefix_data.ptr[7]) != 0x00) {
    return 0;
  }

  // Allow-list for the Pixel Depth field.
  if (prefix_data.len < 17) {
    return prefix_closed ? 0 : -1;
  }
  switch (prefix_data.ptr[16]) {
    case 0x01:
    case 0x08:
    case 0x0F:
    case 0x10:
    case 0x18:
    case 0x20:
      break;
    default:
      return 0;
  }

  return 0x54474120;  // 'TGA 'be
}

WUFFS_BASE__MAYBE_STATIC int32_t  //
wuffs_base__magic_number_guess_fourcc(wuffs_base__slice_u8 prefix_data,
                                      bool prefix_closed) {
  // This is similar to (but different from):
  //  - the magic/Magdir tables under https://github.com/file/file
  //  - the MIME Sniffing algorithm at https://mimesniff.spec.whatwg.org/

  // table holds the 'magic numbers' (which are actually variable length
  // strings). The strings may contain NUL bytes, so the "const char* magic"
  // value starts with the length-minus-1 of the 'magic number'.
  //
  // Keep it sorted by magic[1], then magic[0] descending (prioritizing longer
  // matches) and finally by magic[2:]. When multiple entries match, the
  // longest one wins.
  //
  // The fourcc field might be negated, in which case there's further
  // specialization (see § below).
  static struct {
    int32_t fourcc;
    const char* magic;
  } table[] = {
      {-0x30302020, "\x01\x00\x00"},                  // '00  'be
      {+0x41425852, "\x03\x03\x00\x08\x00"},          // ABXR
      {+0x475A2020, "\x02\x1F\x8B\x08"},              // GZ
      {+0x5A535444, "\x03\x28\xB5\x2F\xFD"},          // ZSTD
      {+0x584D4C20, "\x05\x3C\x3F\x78\x6D\x6C\x20"},  // XML
      {+0x41425853, "\x03\x41\x42\x58\x00"},          // ABXS
      {+0x425A3220, "\x02\x42\x5A\x68"},              // BZ2
      {+0x424D5020, "\x01\x42\x4D"},                  // BMP
      {+0x47494620, "\x03\x47\x49\x46\x38"},          // GIF
      {+0x54494646, "\x03\x49\x49\x2A\x00"},          // TIFF (little-endian)
      {+0x4C5A4950, "\x04\x4C\x5A\x49\x50\x01"},      // LZIP
      {+0x54494646, "\x03\x4D\x4D\x00\x2A"},          // TIFF (big-endian)
      {+0x45544332, "\x03\x50\x4B\x4D\x20"},          // ETC2 (*.pkm)
      {+0x4E50424D, "\x02\x50\x35\x0A"},              // NPBM (P5; *.pgm)
      {+0x4E50424D, "\x02\x50\x36\x0A"},              // NPBM (P6; *.ppm)
      {-0x52494646, "\x03\x52\x49\x46\x46"},          // RIFF
      {+0x4C5A4D41, "\x04\x5D\x00\x10\x00\x00"},      // LZMA
      {+0x4C5A4D41, "\x02\x5D\x00\x00"},              // LZMA
      {+0x4E494520, "\x02\x6E\xC3\xAF"},              // NIE
      {+0x514F4920, "\x03\x71\x6F\x69\x66"},          // QOI
      {+0x5A4C4942, "\x01\x78\x9C"},                  // ZLIB
      {+0x504E4720, "\x03\x89\x50\x4E\x47"},          // PNG
      {+0x54482020, "\x02\xC3\xBE\xFE"},              // TH
      {+0x585A2020, "\x04\xFD\x37\x7A\x58\x5A"},      // XZ
      {+0x4A504547, "\x01\xFF\xD8"},                  // JPEG
  };
  static const size_t table_len = sizeof(table) / sizeof(table[0]);

  if (prefix_data.len == 0) {
    return prefix_closed ? 0 : -1;
  }
  uint8_t pre_first_byte = prefix_data.ptr[0];

  int32_t fourcc = 0;
  size_t i;
  for (i = 0; i < table_len; i++) {
    uint8_t mag_first_byte = ((uint8_t)(table[i].magic[1]));
    if (pre_first_byte < mag_first_byte) {
      break;
    } else if (pre_first_byte > mag_first_byte) {
      continue;
    }
    fourcc = table[i].fourcc;

    uint8_t mag_remaining_len = ((uint8_t)(table[i].magic[0]));
    if (mag_remaining_len == 0) {
      goto match;
    }

    const char* mag_remaining_ptr = table[i].magic + 2;
    uint8_t* pre_remaining_ptr = prefix_data.ptr + 1;
    size_t pre_remaining_len = prefix_data.len - 1;
    if (pre_remaining_len < mag_remaining_len) {
      if (!memcmp(pre_remaining_ptr, mag_remaining_ptr, pre_remaining_len)) {
        return prefix_closed ? 0 : -1;
      }
    } else {
      if (!memcmp(pre_remaining_ptr, mag_remaining_ptr, mag_remaining_len)) {
        goto match;
      }
    }
  }

  if (prefix_data.len < 2) {
    return prefix_closed ? 0 : -1;
  } else if ((prefix_data.ptr[1] == 0x00) || (prefix_data.ptr[1] == 0x01)) {
    return wuffs_base__magic_number_guess_fourcc__maybe_tga(prefix_data,
                                                            prefix_closed);
  }

  return 0;

match:
  // Negative FourCC values (see § above) are further specialized.
  if (fourcc < 0) {
    fourcc = -fourcc;

    if (fourcc == 0x52494646) {  // 'RIFF'be
      if (prefix_data.len < 12) {
        return prefix_closed ? 0 : -1;
      }
      uint32_t x = wuffs_base__peek_u32be__no_bounds_check(prefix_data.ptr + 8);
      if (x == 0x57454250) {  // 'WEBP'be
        return 0x57454250;    // 'WEBP'be
      }

    } else if (fourcc == 0x30302020) {  // '00  'be
      // Binary data starting with multiple 0x00 NUL bytes is quite common.
      // Unfortunately, some file formats also don't start with a magic
      // identifier, so we have to use heuristics (where the order matters, the
      // same as /usr/bin/file's magic/Magdir tables) as best we can. Maybe
      // it's TGA, ICO/CUR, etc. Maybe it's something else.
      int32_t tga = wuffs_base__magic_number_guess_fourcc__maybe_tga(
          prefix_data, prefix_closed);
      if (tga != 0) {
        return tga;
      }
      int32_t ico = wuffs_base__magic_number_guess_fourcc__maybe_ico(
          prefix_data, prefix_closed);
      if (ico != 0) {
        return ico;
      }
      if (prefix_data.len < 4) {
        return prefix_closed ? 0 : -1;
      } else if ((prefix_data.ptr[2] != 0x00) &&
                 ((prefix_data.ptr[2] >= 0x80) ||
                  (prefix_data.ptr[3] != 0x00))) {
        // Roughly speaking, this could be a non-degenerate (non-0-width and
        // non-0-height) WBMP image.
        return 0x57424D50;  // 'WBMP'be
      }
      return 0;
    }
  }
  return fourcc;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__BASE) ||
        // defined(WUFFS_CONFIG__MODULE__BASE__MAGIC)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE) || \
    defined(WUFFS_CONFIG__MODULE__BASE__PIXCONV)

// ---------------- Pixel Swizzler

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
static uint64_t  //
wuffs_private_impl__swizzle_bgrw__bgr__x86_sse42(uint8_t* dst_ptr,
                                                 size_t dst_len,
                                                 uint8_t* dst_palette_ptr,
                                                 size_t dst_palette_len,
                                                 const uint8_t* src_ptr,
                                                 size_t src_len);

static uint64_t  //
wuffs_private_impl__swizzle_bgrw__rgb__x86_sse42(uint8_t* dst_ptr,
                                                 size_t dst_len,
                                                 uint8_t* dst_palette_ptr,
                                                 size_t dst_palette_len,
                                                 const uint8_t* src_ptr,
                                                 size_t src_len);

WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
static uint64_t  //
wuffs_private_impl__swizzle_swap_rgbx_bgrx__x86_sse42(uint8_t* dst_ptr,
                                                      size_t dst_len,
                                                      uint8_t* dst_palette_ptr,
                                                      size_t dst_palette_len,
                                                      const uint8_t* src_ptr,
                                                      size_t src_len);

WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
static uint64_t  //
wuffs_private_impl__swizzle_xxxx__y__x86_sse42(uint8_t* dst_ptr,
                                               size_t dst_len,
                                               uint8_t* dst_palette_ptr,
                                               size_t dst_palette_len,
                                               const uint8_t* src_ptr,
                                               size_t src_len);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)

// --------

static inline uint32_t  //
wuffs_private_impl__swap_u32_argb_abgr(uint32_t u) {
  uint32_t o = u & 0xFF00FF00ul;
  uint32_t r = u & 0x00FF0000ul;
  uint32_t b = u & 0x000000FFul;
  return o | (r >> 16) | (b << 16);
}

static inline uint64_t  //
wuffs_private_impl__swap_u64_argb_abgr(uint64_t u) {
  uint64_t o = u & 0xFFFF0000FFFF0000ull;
  uint64_t r = u & 0x0000FFFF00000000ull;
  uint64_t b = u & 0x000000000000FFFFull;
  return o | (r >> 32) | (b << 32);
}

static inline uint32_t  //
wuffs_private_impl__color_u64__as__color_u32__swap_u32_argb_abgr(uint64_t c) {
  uint32_t a = ((uint32_t)(0xFF & (c >> 56)));
  uint32_t r = ((uint32_t)(0xFF & (c >> 40)));
  uint32_t g = ((uint32_t)(0xFF & (c >> 24)));
  uint32_t b = ((uint32_t)(0xFF & (c >> 8)));
  return (a << 24) | (b << 16) | (g << 8) | (r << 0);
}

// --------

WUFFS_BASE__MAYBE_STATIC wuffs_base__color_u32_argb_premul  //
wuffs_base__pixel_buffer__color_u32_at(const wuffs_base__pixel_buffer* pb,
                                       uint32_t x,
                                       uint32_t y) {
  if (!pb || (x >= pb->pixcfg.private_impl.width) ||
      (y >= pb->pixcfg.private_impl.height)) {
    return 0;
  }

  if (wuffs_base__pixel_format__is_planar(&pb->pixcfg.private_impl.pixfmt)) {
    // TODO: support planar formats.
    return 0;
  }

  size_t stride = pb->private_impl.planes[0].stride;
  const uint8_t* row = pb->private_impl.planes[0].ptr + (stride * ((size_t)y));

  switch (pb->pixcfg.private_impl.pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
      return wuffs_base__peek_u32le__no_bounds_check(row + (4 * ((size_t)x)));

    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY: {
      uint8_t* palette = pb->private_impl.planes[3].ptr;
      return wuffs_base__peek_u32le__no_bounds_check(palette +
                                                     (4 * ((size_t)row[x])));
    }

      // Common formats above. Rarer formats below.

    case WUFFS_BASE__PIXEL_FORMAT__Y:
      return 0xFF000000 | (0x00010101 * ((uint32_t)(row[x])));
    case WUFFS_BASE__PIXEL_FORMAT__Y_16LE:
      return 0xFF000000 | (0x00010101 * ((uint32_t)(row[(2 * x) + 1])));
    case WUFFS_BASE__PIXEL_FORMAT__Y_16BE:
      return 0xFF000000 | (0x00010101 * ((uint32_t)(row[(2 * x) + 0])));
    case WUFFS_BASE__PIXEL_FORMAT__YA_NONPREMUL:
      return wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
          (((uint32_t)(row[(2 * x) + 1])) << 24) |
          (((uint32_t)(row[(2 * x) + 0])) * 0x00010101));

    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL: {
      uint8_t* palette = pb->private_impl.planes[3].ptr;
      return wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
          wuffs_base__peek_u32le__no_bounds_check(palette +
                                                  (4 * ((size_t)row[x]))));
    }

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      return wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(
          wuffs_base__peek_u16le__no_bounds_check(row + (2 * ((size_t)x))));
    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      return 0xFF000000 |
             wuffs_base__peek_u24le__no_bounds_check(row + (3 * ((size_t)x)));
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      return wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
          wuffs_base__peek_u32le__no_bounds_check(row + (4 * ((size_t)x))));
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      return wuffs_base__color_u64_argb_nonpremul__as__color_u32_argb_premul(
          wuffs_base__peek_u64le__no_bounds_check(row + (8 * ((size_t)x))));
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
      return 0xFF000000 |
             wuffs_base__peek_u32le__no_bounds_check(row + (4 * ((size_t)x)));

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      return 0xFF000000 |
             wuffs_base__peek_u24be__no_bounds_check(row + (3 * ((size_t)x)));
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      return wuffs_private_impl__swap_u32_argb_abgr(
          wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
              wuffs_base__peek_u32le__no_bounds_check(row +
                                                      (4 * ((size_t)x)))));
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
      return wuffs_private_impl__swap_u32_argb_abgr(
          wuffs_base__peek_u32le__no_bounds_check(row + (4 * ((size_t)x))));
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      return wuffs_private_impl__swap_u32_argb_abgr(
          0xFF000000 |
          wuffs_base__peek_u32le__no_bounds_check(row + (4 * ((size_t)x))));

    default:
      // TODO: support more formats.
      break;
  }

  return 0;
}

// --------

WUFFS_BASE__MAYBE_STATIC wuffs_base__status  //
wuffs_base__pixel_buffer__set_color_u32_at(
    wuffs_base__pixel_buffer* pb,
    uint32_t x,
    uint32_t y,
    wuffs_base__color_u32_argb_premul color) {
  if (!pb) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if ((x >= pb->pixcfg.private_impl.width) ||
      (y >= pb->pixcfg.private_impl.height)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }

  if (wuffs_base__pixel_format__is_planar(&pb->pixcfg.private_impl.pixfmt)) {
    // TODO: support planar formats.
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }

  size_t stride = pb->private_impl.planes[0].stride;
  uint8_t* row = pb->private_impl.planes[0].ptr + (stride * ((size_t)y));

  switch (pb->pixcfg.private_impl.pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
      wuffs_base__poke_u32le__no_bounds_check(row + (4 * ((size_t)x)), color);
      break;

      // Common formats above. Rarer formats below.

    case WUFFS_BASE__PIXEL_FORMAT__Y:
      wuffs_base__poke_u8__no_bounds_check(
          row + ((size_t)x),
          wuffs_base__color_u32_argb_premul__as__color_u8_gray(color));
      break;
    case WUFFS_BASE__PIXEL_FORMAT__Y_16LE:
      wuffs_base__poke_u16le__no_bounds_check(
          row + (2 * ((size_t)x)),
          wuffs_base__color_u32_argb_premul__as__color_u16_gray(color));
      break;
    case WUFFS_BASE__PIXEL_FORMAT__Y_16BE:
      wuffs_base__poke_u16be__no_bounds_check(
          row + (2 * ((size_t)x)),
          wuffs_base__color_u32_argb_premul__as__color_u16_gray(color));
      break;
    case WUFFS_BASE__PIXEL_FORMAT__YA_NONPREMUL:
      wuffs_base__poke_u16le__no_bounds_check(
          row + (2 * ((size_t)x)),
          wuffs_base__color_u32_argb_premul__as__color_u16_alpha_gray_nonpremul(
              color));
      break;

    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
      wuffs_base__poke_u8__no_bounds_check(
          row + ((size_t)x), wuffs_base__pixel_palette__closest_element(
                                 wuffs_base__pixel_buffer__palette(pb),
                                 pb->pixcfg.private_impl.pixfmt, color));
      break;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      wuffs_base__poke_u16le__no_bounds_check(
          row + (2 * ((size_t)x)),
          wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(color));
      break;
    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      wuffs_base__poke_u24le__no_bounds_check(row + (3 * ((size_t)x)), color);
      break;
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      wuffs_base__poke_u32le__no_bounds_check(
          row + (4 * ((size_t)x)),
          wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul(
              color));
      break;
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      wuffs_base__poke_u64le__no_bounds_check(
          row + (8 * ((size_t)x)),
          wuffs_base__color_u32_argb_premul__as__color_u64_argb_nonpremul(
              color));
      break;
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
      wuffs_base__poke_u32le__no_bounds_check(
          row + (4 * ((size_t)x)), (color >> 31) ? (color | 0xFF000000) : 0);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      wuffs_base__poke_u24le__no_bounds_check(
          row + (3 * ((size_t)x)),
          wuffs_private_impl__swap_u32_argb_abgr(color));
      break;
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      wuffs_base__poke_u32le__no_bounds_check(
          row + (4 * ((size_t)x)),
          wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul(
              wuffs_private_impl__swap_u32_argb_abgr(color)));
      break;
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      wuffs_base__poke_u32le__no_bounds_check(
          row + (4 * ((size_t)x)),
          wuffs_private_impl__swap_u32_argb_abgr(color));
      break;

    default:
      // TODO: support more formats.
      return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }

  return wuffs_base__make_status(NULL);
}

// --------

static inline void  //
wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xx(
    wuffs_base__pixel_buffer* pb,
    wuffs_base__rect_ie_u32 rect,
    uint16_t color) {
  size_t stride = pb->private_impl.planes[0].stride;
  uint32_t width = wuffs_base__rect_ie_u32__width(&rect);
  if ((stride == (2 * ((uint64_t)width))) && (rect.min_incl_x == 0)) {
    uint8_t* ptr =
        pb->private_impl.planes[0].ptr + (stride * ((size_t)rect.min_incl_y));
    uint32_t height = wuffs_base__rect_ie_u32__height(&rect);
    size_t n;
    for (n = ((size_t)width) * ((size_t)height); n > 0; n--) {
      wuffs_base__poke_u16le__no_bounds_check(ptr, color);
      ptr += 2;
    }
    return;
  }

  uint32_t y;
  for (y = rect.min_incl_y; y < rect.max_excl_y; y++) {
    uint8_t* ptr = pb->private_impl.planes[0].ptr + (stride * ((size_t)y)) +
                   (2 * ((size_t)rect.min_incl_x));
    uint32_t n;
    for (n = width; n > 0; n--) {
      wuffs_base__poke_u16le__no_bounds_check(ptr, color);
      ptr += 2;
    }
  }
}

static inline void  //
wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xxx(
    wuffs_base__pixel_buffer* pb,
    wuffs_base__rect_ie_u32 rect,
    uint32_t color) {
  size_t stride = pb->private_impl.planes[0].stride;
  uint32_t width = wuffs_base__rect_ie_u32__width(&rect);
  if ((stride == (3 * ((uint64_t)width))) && (rect.min_incl_x == 0)) {
    uint8_t* ptr =
        pb->private_impl.planes[0].ptr + (stride * ((size_t)rect.min_incl_y));
    uint32_t height = wuffs_base__rect_ie_u32__height(&rect);
    size_t n;
    for (n = ((size_t)width) * ((size_t)height); n > 0; n--) {
      wuffs_base__poke_u24le__no_bounds_check(ptr, color);
      ptr += 3;
    }
    return;
  }

  uint32_t y;
  for (y = rect.min_incl_y; y < rect.max_excl_y; y++) {
    uint8_t* ptr = pb->private_impl.planes[0].ptr + (stride * ((size_t)y)) +
                   (3 * ((size_t)rect.min_incl_x));
    uint32_t n;
    for (n = width; n > 0; n--) {
      wuffs_base__poke_u24le__no_bounds_check(ptr, color);
      ptr += 3;
    }
  }
}

static inline void  //
wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xxxx(
    wuffs_base__pixel_buffer* pb,
    wuffs_base__rect_ie_u32 rect,
    uint32_t color) {
  size_t stride = pb->private_impl.planes[0].stride;
  uint32_t width = wuffs_base__rect_ie_u32__width(&rect);
  if ((stride == (4 * ((uint64_t)width))) && (rect.min_incl_x == 0)) {
    uint8_t* ptr =
        pb->private_impl.planes[0].ptr + (stride * ((size_t)rect.min_incl_y));
    uint32_t height = wuffs_base__rect_ie_u32__height(&rect);
    size_t n;
    for (n = ((size_t)width) * ((size_t)height); n > 0; n--) {
      wuffs_base__poke_u32le__no_bounds_check(ptr, color);
      ptr += 4;
    }
    return;
  }

  uint32_t y;
  for (y = rect.min_incl_y; y < rect.max_excl_y; y++) {
    uint8_t* ptr = pb->private_impl.planes[0].ptr + (stride * ((size_t)y)) +
                   (4 * ((size_t)rect.min_incl_x));
    uint32_t n;
    for (n = width; n > 0; n--) {
      wuffs_base__poke_u32le__no_bounds_check(ptr, color);
      ptr += 4;
    }
  }
}

static inline void  //
wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xxxxxxxx(
    wuffs_base__pixel_buffer* pb,
    wuffs_base__rect_ie_u32 rect,
    uint64_t color) {
  size_t stride = pb->private_impl.planes[0].stride;
  uint32_t width = wuffs_base__rect_ie_u32__width(&rect);
  if ((stride == (8 * ((uint64_t)width))) && (rect.min_incl_x == 0)) {
    uint8_t* ptr =
        pb->private_impl.planes[0].ptr + (stride * ((size_t)rect.min_incl_y));
    uint32_t height = wuffs_base__rect_ie_u32__height(&rect);
    size_t n;
    for (n = ((size_t)width) * ((size_t)height); n > 0; n--) {
      wuffs_base__poke_u64le__no_bounds_check(ptr, color);
      ptr += 8;
    }
    return;
  }

  uint32_t y;
  for (y = rect.min_incl_y; y < rect.max_excl_y; y++) {
    uint8_t* ptr = pb->private_impl.planes[0].ptr + (stride * ((size_t)y)) +
                   (8 * ((size_t)rect.min_incl_x));
    uint32_t n;
    for (n = width; n > 0; n--) {
      wuffs_base__poke_u64le__no_bounds_check(ptr, color);
      ptr += 8;
    }
  }
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__status  //
wuffs_base__pixel_buffer__set_color_u32_fill_rect(
    wuffs_base__pixel_buffer* pb,
    wuffs_base__rect_ie_u32 rect,
    wuffs_base__color_u32_argb_premul color) {
  if (!pb) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  } else if (wuffs_base__rect_ie_u32__is_empty(&rect)) {
    return wuffs_base__make_status(NULL);
  }
  wuffs_base__rect_ie_u32 bounds =
      wuffs_base__pixel_config__bounds(&pb->pixcfg);
  if (!wuffs_base__rect_ie_u32__contains_rect(&bounds, rect)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }

  if (wuffs_base__pixel_format__is_planar(&pb->pixcfg.private_impl.pixfmt)) {
    // TODO: support planar formats.
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }

  switch (pb->pixcfg.private_impl.pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
      wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xxxx(pb, rect,
                                                                      color);
      return wuffs_base__make_status(NULL);

      // Common formats above. Rarer formats below.

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xx(
          pb, rect,
          wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(color));
      return wuffs_base__make_status(NULL);

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xxx(pb, rect,
                                                                     color);
      return wuffs_base__make_status(NULL);

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xxxx(
          pb, rect,
          wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul(
              color));
      return wuffs_base__make_status(NULL);

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xxxxxxxx(
          pb, rect,
          wuffs_base__color_u32_argb_premul__as__color_u64_argb_nonpremul(
              color));
      return wuffs_base__make_status(NULL);

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xxxx(
          pb, rect,
          wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul(
              wuffs_private_impl__swap_u32_argb_abgr(color)));
      return wuffs_base__make_status(NULL);

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      wuffs_private_impl__pixel_buffer__set_color_u32_fill_rect__xxxx(
          pb, rect, wuffs_private_impl__swap_u32_argb_abgr(color));
      return wuffs_base__make_status(NULL);
  }

  uint32_t y;
  for (y = rect.min_incl_y; y < rect.max_excl_y; y++) {
    uint32_t x;
    for (x = rect.min_incl_x; x < rect.max_excl_x; x++) {
      wuffs_base__pixel_buffer__set_color_u32_at(pb, x, y, color);
    }
  }
  return wuffs_base__make_status(NULL);
}

WUFFS_BASE__MAYBE_STATIC bool  //
wuffs_base__pixel_buffer__is_opaque(const wuffs_base__pixel_buffer* pb) {
  if (!pb) {
    return false;
  } else if (wuffs_base__pixel_format__transparency(
                 &pb->pixcfg.private_impl.pixfmt) ==
             WUFFS_BASE__PIXEL_ALPHA_TRANSPARENCY__OPAQUE) {
    return true;
  }

  uint32_t w = pb->pixcfg.private_impl.width;
  uint32_t h = pb->pixcfg.private_impl.height;
  if ((w <= 0) || (h <= 0)) {
    return true;
  }
  const wuffs_base__table_u8* p = &pb->private_impl.planes[0];

  switch (pb->pixcfg.private_impl.pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY: {
      for (uint32_t y = 0; y < h; y++) {
        const uint8_t* row = p->ptr + (p->stride * (size_t)y);
        for (uint32_t x = 0; x < w; x++) {
          if (row[(4 * (size_t)x) + 3] != 0xFF) {
            return false;
          }
        }
      }
      return true;
    }

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE: {
      for (uint32_t y = 0; y < h; y++) {
        const uint8_t* row = p->ptr + (p->stride * (size_t)y);
        for (uint32_t x = 0; x < w; x++) {
          if ((row[(8 * (size_t)x) + 6] != 0xFF) ||
              (row[(8 * (size_t)x) + 7] != 0xFF)) {
            return false;
          }
        }
      }
      return true;
    }

    case WUFFS_BASE__PIXEL_FORMAT__YA_NONPREMUL: {
      for (uint32_t y = 0; y < h; y++) {
        const uint8_t* row = p->ptr + (p->stride * (size_t)y);
        for (uint32_t x = 0; x < w; x++) {
          if (row[(2 * (size_t)x) + 1] != 0xFF) {
            return false;
          }
        }
      }
      return true;
    }

    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL: {
      const uint8_t* palette = pb->private_impl.planes[3].ptr;
      for (uint32_t i = 0; true; i++) {
        if (i >= 256) {
          return true;
        } else if (palette[(4 * (size_t)i) + 3] != 0xFF) {
          break;
        }
      }

      for (uint32_t y = 0; y < h; y++) {
        const uint8_t* row = p->ptr + (p->stride * (size_t)y);
        for (uint32_t x = 0; x < w; x++) {
          if (palette[(4 * (size_t)row[x]) + 3] != 0xFF) {
            return false;
          }
        }
      }

      return true;
    }

    default:
      break;
  }
  return false;
}

// --------

WUFFS_BASE__MAYBE_STATIC uint8_t  //
wuffs_base__pixel_palette__closest_element(
    wuffs_base__slice_u8 palette_slice,
    wuffs_base__pixel_format palette_format,
    wuffs_base__color_u32_argb_premul c) {
  size_t n = palette_slice.len / 4;
  if (n > (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
    n = (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4);
  }
  size_t best_index = 0;
  uint64_t best_score = 0xFFFFFFFFFFFFFFFF;

  // Work in 16-bit color.
  uint32_t ca = 0x101 * (0xFF & (c >> 24));
  uint32_t cr = 0x101 * (0xFF & (c >> 16));
  uint32_t cg = 0x101 * (0xFF & (c >> 8));
  uint32_t cb = 0x101 * (0xFF & (c >> 0));

  switch (palette_format.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY: {
      bool nonpremul = palette_format.repr ==
                       WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL;

      size_t i;
      for (i = 0; i < n; i++) {
        // Work in 16-bit color.
        uint32_t pb = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 0]));
        uint32_t pg = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 1]));
        uint32_t pr = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 2]));
        uint32_t pa = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 3]));

        // Convert to premultiplied alpha.
        if (nonpremul && (pa != 0xFFFF)) {
          pb = (pb * pa) / 0xFFFF;
          pg = (pg * pa) / 0xFFFF;
          pr = (pr * pa) / 0xFFFF;
        }

        // These deltas are conceptually int32_t (signed) but after squaring,
        // it's equivalent to work in uint32_t (unsigned).
        pb -= cb;
        pg -= cg;
        pr -= cr;
        pa -= ca;
        uint64_t score = ((uint64_t)(pb * pb)) + ((uint64_t)(pg * pg)) +
                         ((uint64_t)(pr * pr)) + ((uint64_t)(pa * pa));
        if (best_score > score) {
          best_score = score;
          best_index = i;
        }
      }
      break;
    }
  }

  return (uint8_t)best_index;
}

// --------

static inline uint32_t  //
wuffs_private_impl__composite_nonpremul_nonpremul_u32_axxx(
    uint32_t dst_nonpremul,
    uint32_t src_nonpremul) {
  // Extract 16-bit color components.
  //
  // If the destination is transparent then SRC_OVER is equivalent to SRC: just
  // return src_nonpremul. This isn't just an optimization (skipping the rest
  // of the function's computation). It also preserves the nonpremul
  // distinction between e.g. transparent red and transparent blue that would
  // otherwise be lost by converting from nonpremul to premul and back.
  uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
  if (da == 0) {
    return src_nonpremul;
  }
  uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
  uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
  uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
  uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
  uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
  uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
  uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));

  // Convert dst from nonpremul to premul.
  dr = (dr * da) / 0xFFFF;
  dg = (dg * da) / 0xFFFF;
  db = (db * da) / 0xFFFF;

  // Calculate the inverse of the src-alpha: how much of the dst to keep.
  uint32_t ia = 0xFFFF - sa;

  // Composite src (nonpremul) over dst (premul).
  da = sa + ((da * ia) / 0xFFFF);
  dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
  dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
  db = ((sb * sa) + (db * ia)) / 0xFFFF;

  // Convert dst from premul to nonpremul.
  if (da != 0) {
    dr = (dr * 0xFFFF) / da;
    dg = (dg * 0xFFFF) / da;
    db = (db * 0xFFFF) / da;
  }

  // Convert from 16-bit color to 8-bit color.
  da >>= 8;
  dr >>= 8;
  dg >>= 8;
  db >>= 8;

  // Combine components.
  return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
}

static inline uint64_t  //
wuffs_private_impl__composite_nonpremul_nonpremul_u64_axxx(
    uint64_t dst_nonpremul,
    uint64_t src_nonpremul) {
  // Extract components.
  //
  // If the destination is transparent then SRC_OVER is equivalent to SRC: just
  // return src_nonpremul. This isn't just an optimization (skipping the rest
  // of the function's computation). It also preserves the nonpremul
  // distinction between e.g. transparent red and transparent blue that would
  // otherwise be lost by converting from nonpremul to premul and back.
  uint64_t da = 0xFFFF & (dst_nonpremul >> 48);
  if (da == 0) {
    return src_nonpremul;
  }
  uint64_t dr = 0xFFFF & (dst_nonpremul >> 32);
  uint64_t dg = 0xFFFF & (dst_nonpremul >> 16);
  uint64_t db = 0xFFFF & (dst_nonpremul >> 0);
  uint64_t sa = 0xFFFF & (src_nonpremul >> 48);
  uint64_t sr = 0xFFFF & (src_nonpremul >> 32);
  uint64_t sg = 0xFFFF & (src_nonpremul >> 16);
  uint64_t sb = 0xFFFF & (src_nonpremul >> 0);

  // Convert dst from nonpremul to premul.
  dr = (dr * da) / 0xFFFF;
  dg = (dg * da) / 0xFFFF;
  db = (db * da) / 0xFFFF;

  // Calculate the inverse of the src-alpha: how much of the dst to keep.
  uint64_t ia = 0xFFFF - sa;

  // Composite src (nonpremul) over dst (premul).
  da = sa + ((da * ia) / 0xFFFF);
  dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
  dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
  db = ((sb * sa) + (db * ia)) / 0xFFFF;

  // Convert dst from premul to nonpremul.
  if (da != 0) {
    dr = (dr * 0xFFFF) / da;
    dg = (dg * 0xFFFF) / da;
    db = (db * 0xFFFF) / da;
  }

  // Combine components.
  return (db << 0) | (dg << 16) | (dr << 32) | (da << 48);
}

static inline uint32_t  //
wuffs_private_impl__composite_nonpremul_premul_u32_axxx(uint32_t dst_nonpremul,
                                                        uint32_t src_premul) {
  // Extract 16-bit color components.
  uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
  uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
  uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
  uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
  uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
  uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
  uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
  uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));

  // Convert dst from nonpremul to premul.
  dr = (dr * da) / 0xFFFF;
  dg = (dg * da) / 0xFFFF;
  db = (db * da) / 0xFFFF;

  // Calculate the inverse of the src-alpha: how much of the dst to keep.
  uint32_t ia = 0xFFFF - sa;

  // Composite src (premul) over dst (premul).
  da = sa + ((da * ia) / 0xFFFF);
  dr = sr + ((dr * ia) / 0xFFFF);
  dg = sg + ((dg * ia) / 0xFFFF);
  db = sb + ((db * ia) / 0xFFFF);

  // Convert dst from premul to nonpremul.
  if (da != 0) {
    dr = (dr * 0xFFFF) / da;
    dg = (dg * 0xFFFF) / da;
    db = (db * 0xFFFF) / da;
  }

  // Convert from 16-bit color to 8-bit color.
  da >>= 8;
  dr >>= 8;
  dg >>= 8;
  db >>= 8;

  // Combine components.
  return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
}

static inline uint64_t  //
wuffs_private_impl__composite_nonpremul_premul_u64_axxx(uint64_t dst_nonpremul,
                                                        uint64_t src_premul) {
  // Extract components.
  uint64_t da = 0xFFFF & (dst_nonpremul >> 48);
  uint64_t dr = 0xFFFF & (dst_nonpremul >> 32);
  uint64_t dg = 0xFFFF & (dst_nonpremul >> 16);
  uint64_t db = 0xFFFF & (dst_nonpremul >> 0);
  uint64_t sa = 0xFFFF & (src_premul >> 48);
  uint64_t sr = 0xFFFF & (src_premul >> 32);
  uint64_t sg = 0xFFFF & (src_premul >> 16);
  uint64_t sb = 0xFFFF & (src_premul >> 0);

  // Convert dst from nonpremul to premul.
  dr = (dr * da) / 0xFFFF;
  dg = (dg * da) / 0xFFFF;
  db = (db * da) / 0xFFFF;

  // Calculate the inverse of the src-alpha: how much of the dst to keep.
  uint64_t ia = 0xFFFF - sa;

  // Composite src (premul) over dst (premul).
  da = sa + ((da * ia) / 0xFFFF);
  dr = sr + ((dr * ia) / 0xFFFF);
  dg = sg + ((dg * ia) / 0xFFFF);
  db = sb + ((db * ia) / 0xFFFF);

  // Convert dst from premul to nonpremul.
  if (da != 0) {
    dr = (dr * 0xFFFF) / da;
    dg = (dg * 0xFFFF) / da;
    db = (db * 0xFFFF) / da;
  }

  // Combine components.
  return (db << 0) | (dg << 16) | (dr << 32) | (da << 48);
}

static inline uint32_t  //
wuffs_private_impl__composite_premul_nonpremul_u32_axxx(
    uint32_t dst_premul,
    uint32_t src_nonpremul) {
  // Extract 16-bit color components.
  uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
  uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
  uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
  uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
  uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
  uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
  uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
  uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));

  // Calculate the inverse of the src-alpha: how much of the dst to keep.
  uint32_t ia = 0xFFFF - sa;

  // Composite src (nonpremul) over dst (premul).
  da = sa + ((da * ia) / 0xFFFF);
  dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
  dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
  db = ((sb * sa) + (db * ia)) / 0xFFFF;

  // Convert from 16-bit color to 8-bit color.
  da >>= 8;
  dr >>= 8;
  dg >>= 8;
  db >>= 8;

  // Combine components.
  return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
}

static inline uint64_t  //
wuffs_private_impl__composite_premul_nonpremul_u64_axxx(
    uint64_t dst_premul,
    uint64_t src_nonpremul) {
  // Extract components.
  uint64_t da = 0xFFFF & (dst_premul >> 48);
  uint64_t dr = 0xFFFF & (dst_premul >> 32);
  uint64_t dg = 0xFFFF & (dst_premul >> 16);
  uint64_t db = 0xFFFF & (dst_premul >> 0);
  uint64_t sa = 0xFFFF & (src_nonpremul >> 48);
  uint64_t sr = 0xFFFF & (src_nonpremul >> 32);
  uint64_t sg = 0xFFFF & (src_nonpremul >> 16);
  uint64_t sb = 0xFFFF & (src_nonpremul >> 0);

  // Calculate the inverse of the src-alpha: how much of the dst to keep.
  uint64_t ia = 0xFFFF - sa;

  // Composite src (nonpremul) over dst (premul).
  da = sa + ((da * ia) / 0xFFFF);
  dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
  dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
  db = ((sb * sa) + (db * ia)) / 0xFFFF;

  // Combine components.
  return (db << 0) | (dg << 16) | (dr << 32) | (da << 48);
}

static inline uint32_t  //
wuffs_private_impl__composite_premul_premul_u32_axxx(uint32_t dst_premul,
                                                     uint32_t src_premul) {
  // Extract 16-bit color components.
  uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
  uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
  uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
  uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
  uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
  uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
  uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
  uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));

  // Calculate the inverse of the src-alpha: how much of the dst to keep.
  uint32_t ia = 0xFFFF - sa;

  // Composite src (premul) over dst (premul).
  da = sa + ((da * ia) / 0xFFFF);
  dr = sr + ((dr * ia) / 0xFFFF);
  dg = sg + ((dg * ia) / 0xFFFF);
  db = sb + ((db * ia) / 0xFFFF);

  // Convert from 16-bit color to 8-bit color.
  da >>= 8;
  dr >>= 8;
  dg >>= 8;
  db >>= 8;

  // Combine components.
  return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_squash_align4_bgr_565_8888(uint8_t* dst_ptr,
                                                       size_t dst_len,
                                                       const uint8_t* src_ptr,
                                                       size_t src_len,
                                                       bool nonpremul) {
  size_t len = (dst_len < src_len ? dst_len : src_len) / 4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n--) {
    uint32_t argb = wuffs_base__peek_u32le__no_bounds_check(s);
    if (nonpremul) {
      argb =
          wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(argb);
    }
    uint32_t b5 = 0x1F & (argb >> (8 - 5));
    uint32_t g6 = 0x3F & (argb >> (16 - 6));
    uint32_t r5 = 0x1F & (argb >> (24 - 5));
    uint32_t alpha = argb & 0xFF000000;
    wuffs_base__poke_u32le__no_bounds_check(
        d, alpha | (r5 << 11) | (g6 << 5) | (b5 << 0));
    s += 4;
    d += 4;
  }
  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_squash_align4_y_8888(uint8_t* dst_ptr,
                                                 size_t dst_len,
                                                 const uint8_t* src_ptr,
                                                 size_t src_len,
                                                 bool nonpremul) {
  size_t len = (dst_len < src_len ? dst_len : src_len) / 4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n--) {
    uint32_t argb = wuffs_base__peek_u32le__no_bounds_check(s);
    if (nonpremul) {
      argb =
          wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(argb);
    }
    uint32_t s0 = wuffs_base__color_u32_argb_premul__as__color_u8_gray(argb);
    wuffs_base__poke_u32le__no_bounds_check(
        d, (argb & 0xFF000000) | (s0 * 0x010101));
    s += 4;
    d += 4;
  }
  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_swap_rgb_bgr(uint8_t* dst_ptr,
                                         size_t dst_len,
                                         uint8_t* dst_palette_ptr,
                                         size_t dst_palette_len,
                                         const uint8_t* src_ptr,
                                         size_t src_len) {
  size_t len = (dst_len < src_len ? dst_len : src_len) / 3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n--) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    d[0] = s2;
    d[1] = s1;
    d[2] = s0;
    s += 3;
    d += 3;
  }
  return len;
}

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
static uint64_t  //
wuffs_private_impl__swizzle_swap_rgbx_bgrx__x86_sse42(uint8_t* dst_ptr,
                                                      size_t dst_len,
                                                      uint8_t* dst_palette_ptr,
                                                      size_t dst_palette_len,
                                                      const uint8_t* src_ptr,
                                                      size_t src_len) {
  size_t len = (dst_len < src_len ? dst_len : src_len) / 4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  __m128i shuffle = _mm_set_epi8(+0x0F, +0x0C, +0x0D, +0x0E,  //
                                 +0x0B, +0x08, +0x09, +0x0A,  //
                                 +0x07, +0x04, +0x05, +0x06,  //
                                 +0x03, +0x00, +0x01, +0x02);

  while (n >= 4) {
    __m128i x;
    x = _mm_lddqu_si128((const __m128i*)(const void*)s);
    x = _mm_shuffle_epi8(x, shuffle);
    _mm_storeu_si128((__m128i*)(void*)d, x);

    s += 4 * 4;
    d += 4 * 4;
    n -= 4;
  }

  while (n--) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    uint8_t s3 = s[3];
    d[0] = s2;
    d[1] = s1;
    d[2] = s0;
    d[3] = s3;
    s += 4;
    d += 4;
  }
  return len;
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

static uint64_t  //
wuffs_private_impl__swizzle_swap_rgbx_bgrx(uint8_t* dst_ptr,
                                           size_t dst_len,
                                           uint8_t* dst_palette_ptr,
                                           size_t dst_palette_len,
                                           const uint8_t* src_ptr,
                                           size_t src_len) {
  size_t len = (dst_len < src_len ? dst_len : src_len) / 4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n--) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    uint8_t s3 = s[3];
    d[0] = s2;
    d[1] = s1;
    d[2] = s0;
    d[3] = s3;
    s += 4;
    d += 4;
  }
  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_copy_1_1(uint8_t* dst_ptr,
                                     size_t dst_len,
                                     uint8_t* dst_palette_ptr,
                                     size_t dst_palette_len,
                                     const uint8_t* src_ptr,
                                     size_t src_len) {
  size_t len = (dst_len < src_len) ? dst_len : src_len;
  if (len > 0) {
    memmove(dst_ptr, src_ptr, len);
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_copy_2_2(uint8_t* dst_ptr,
                                     size_t dst_len,
                                     uint8_t* dst_palette_ptr,
                                     size_t dst_palette_len,
                                     const uint8_t* src_ptr,
                                     size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len2 < src_len2) ? dst_len2 : src_len2;
  if (len > 0) {
    memmove(dst_ptr, src_ptr, len * 2);
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_copy_3_3(uint8_t* dst_ptr,
                                     size_t dst_len,
                                     uint8_t* dst_palette_ptr,
                                     size_t dst_palette_len,
                                     const uint8_t* src_ptr,
                                     size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len3 < src_len3) ? dst_len3 : src_len3;
  if (len > 0) {
    memmove(dst_ptr, src_ptr, len * 3);
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_copy_4_4(uint8_t* dst_ptr,
                                     size_t dst_len,
                                     uint8_t* dst_palette_ptr,
                                     size_t dst_palette_len,
                                     const uint8_t* src_ptr,
                                     size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  if (len > 0) {
    memmove(dst_ptr, src_ptr, len * 4);
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_copy_8_8(uint8_t* dst_ptr,
                                     size_t dst_len,
                                     uint8_t* dst_palette_ptr,
                                     size_t dst_palette_len,
                                     const uint8_t* src_ptr,
                                     size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len8 < src_len8) ? dst_len8 : src_len8;
  if (len > 0) {
    memmove(dst_ptr, src_ptr, len * 8);
  }
  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__bgr(uint8_t* dst_ptr,
                                         size_t dst_len,
                                         uint8_t* dst_palette_ptr,
                                         size_t dst_palette_len,
                                         const uint8_t* src_ptr,
                                         size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len2 < src_len3) ? dst_len2 : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t b5 = (uint32_t)(s[0] >> 3);
    uint32_t g6 = (uint32_t)(s[1] >> 2);
    uint32_t r5 = (uint32_t)(s[2] >> 3);
    uint32_t rgb_565 = (r5 << 11) | (g6 << 5) | (b5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);

    s += 1 * 3;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__bgrx(uint8_t* dst_ptr,
                                          size_t dst_len,
                                          uint8_t* dst_palette_ptr,
                                          size_t dst_palette_len,
                                          const uint8_t* src_ptr,
                                          size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len2 < src_len4) ? dst_len2 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t b5 = (uint32_t)(s[0] >> 3);
    uint32_t g6 = (uint32_t)(s[1] >> 2);
    uint32_t r5 = (uint32_t)(s[2] >> 3);
    uint32_t rgb_565 = (r5 << 11) | (g6 << 5) | (b5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);

    s += 1 * 4;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__bgra_nonpremul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len2 < src_len4) ? dst_len2 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u16le__no_bounds_check(
        d + (0 * 2),
        wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
            wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
                wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)))));

    s += 1 * 4;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__bgra_nonpremul_4x16le__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len2 < src_len8) ? dst_len2 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u16le__no_bounds_check(
        d + (0 * 2),
        wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
            wuffs_base__color_u64_argb_nonpremul__as__color_u32_argb_premul(
                wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8)))));

    s += 1 * 8;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len2 < src_len4) ? dst_len2 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t sa = 0x101 * ((uint32_t)s[3]);
    uint32_t sr = 0x101 * ((uint32_t)s[2]);
    uint32_t sg = 0x101 * ((uint32_t)s[1]);
    uint32_t sb = 0x101 * ((uint32_t)s[0]);

    // Convert from 565 color to 16-bit color.
    uint32_t old_rgb_565 = wuffs_base__peek_u16le__no_bounds_check(d + (0 * 2));
    uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
    uint32_t dr = (0x8421 * old_r5) >> 4;
    uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
    uint32_t dg = (0x1041 * old_g6) >> 2;
    uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
    uint32_t db = (0x8421 * old_b5) >> 4;

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (nonpremul) over dst (premul).
    dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
    dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
    db = ((sb * sa) + (db * ia)) / 0xFFFF;

    // Convert from 16-bit color to 565 color and combine the components.
    uint32_t new_r5 = 0x1F & (dr >> 11);
    uint32_t new_g6 = 0x3F & (dg >> 10);
    uint32_t new_b5 = 0x1F & (db >> 11);
    uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)new_rgb_565);

    s += 1 * 4;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__bgra_nonpremul_4x16le__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len2 < src_len8) ? dst_len2 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t sa = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 6));
    uint32_t sr = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 4));
    uint32_t sg = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 2));
    uint32_t sb = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 0));

    // Convert from 565 color to 16-bit color.
    uint32_t old_rgb_565 = wuffs_base__peek_u16le__no_bounds_check(d + (0 * 2));
    uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
    uint32_t dr = (0x8421 * old_r5) >> 4;
    uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
    uint32_t dg = (0x1041 * old_g6) >> 2;
    uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
    uint32_t db = (0x8421 * old_b5) >> 4;

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (nonpremul) over dst (premul).
    dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
    dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
    db = ((sb * sa) + (db * ia)) / 0xFFFF;

    // Convert from 16-bit color to 565 color and combine the components.
    uint32_t new_r5 = 0x1F & (dr >> 11);
    uint32_t new_g6 = 0x3F & (dg >> 10);
    uint32_t new_b5 = 0x1F & (db >> 11);
    uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)new_rgb_565);

    s += 1 * 8;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__bgra_premul__src(uint8_t* dst_ptr,
                                                      size_t dst_len,
                                                      uint8_t* dst_palette_ptr,
                                                      size_t dst_palette_len,
                                                      const uint8_t* src_ptr,
                                                      size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len2 < src_len4) ? dst_len2 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u16le__no_bounds_check(
        d + (0 * 2), wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
                         wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4))));

    s += 1 * 4;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__bgra_premul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len2 < src_len4) ? dst_len2 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t sa = 0x101 * ((uint32_t)s[3]);
    uint32_t sr = 0x101 * ((uint32_t)s[2]);
    uint32_t sg = 0x101 * ((uint32_t)s[1]);
    uint32_t sb = 0x101 * ((uint32_t)s[0]);

    // Convert from 565 color to 16-bit color.
    uint32_t old_rgb_565 = wuffs_base__peek_u16le__no_bounds_check(d + (0 * 2));
    uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
    uint32_t dr = (0x8421 * old_r5) >> 4;
    uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
    uint32_t dg = (0x1041 * old_g6) >> 2;
    uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
    uint32_t db = (0x8421 * old_b5) >> 4;

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (premul) over dst (premul).
    dr = sr + ((dr * ia) / 0xFFFF);
    dg = sg + ((dg * ia) / 0xFFFF);
    db = sb + ((db * ia) / 0xFFFF);

    // Convert from 16-bit color to 565 color and combine the components.
    uint32_t new_r5 = 0x1F & (dr >> 11);
    uint32_t new_g6 = 0x3F & (dg >> 10);
    uint32_t new_b5 = 0x1F & (db >> 11);
    uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)new_rgb_565);

    s += 1 * 4;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__rgb(uint8_t* dst_ptr,
                                         size_t dst_len,
                                         uint8_t* dst_palette_ptr,
                                         size_t dst_palette_len,
                                         const uint8_t* src_ptr,
                                         size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len2 < src_len3) ? dst_len2 : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t r5 = (uint32_t)(s[0] >> 3);
    uint32_t g6 = (uint32_t)(s[1] >> 2);
    uint32_t b5 = (uint32_t)(s[2] >> 3);
    uint32_t rgb_565 = (r5 << 11) | (g6 << 5) | (b5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);

    s += 1 * 3;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__rgba_nonpremul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len2 < src_len4) ? dst_len2 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u16le__no_bounds_check(
        d + (0 * 2),
        wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
            wuffs_private_impl__swap_u32_argb_abgr(
                wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
                    wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4))))));

    s += 1 * 4;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__rgba_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len2 < src_len4) ? dst_len2 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t sa = 0x101 * ((uint32_t)s[3]);
    uint32_t sb = 0x101 * ((uint32_t)s[2]);
    uint32_t sg = 0x101 * ((uint32_t)s[1]);
    uint32_t sr = 0x101 * ((uint32_t)s[0]);

    // Convert from 565 color to 16-bit color.
    uint32_t old_rgb_565 = wuffs_base__peek_u16le__no_bounds_check(d + (0 * 2));
    uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
    uint32_t dr = (0x8421 * old_r5) >> 4;
    uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
    uint32_t dg = (0x1041 * old_g6) >> 2;
    uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
    uint32_t db = (0x8421 * old_b5) >> 4;

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (nonpremul) over dst (premul).
    dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
    dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
    db = ((sb * sa) + (db * ia)) / 0xFFFF;

    // Convert from 16-bit color to 565 color and combine the components.
    uint32_t new_r5 = 0x1F & (dr >> 11);
    uint32_t new_g6 = 0x3F & (dg >> 10);
    uint32_t new_b5 = 0x1F & (db >> 11);
    uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)new_rgb_565);

    s += 1 * 4;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__rgba_premul__src(uint8_t* dst_ptr,
                                                      size_t dst_len,
                                                      uint8_t* dst_palette_ptr,
                                                      size_t dst_palette_len,
                                                      const uint8_t* src_ptr,
                                                      size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len2 < src_len4) ? dst_len2 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u16le__no_bounds_check(
        d + (0 * 2),
        wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
            wuffs_private_impl__swap_u32_argb_abgr(
                wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)))));

    s += 1 * 4;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__rgba_premul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len2 < src_len4) ? dst_len2 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t sa = 0x101 * ((uint32_t)s[3]);
    uint32_t sb = 0x101 * ((uint32_t)s[2]);
    uint32_t sg = 0x101 * ((uint32_t)s[1]);
    uint32_t sr = 0x101 * ((uint32_t)s[0]);

    // Convert from 565 color to 16-bit color.
    uint32_t old_rgb_565 = wuffs_base__peek_u16le__no_bounds_check(d + (0 * 2));
    uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
    uint32_t dr = (0x8421 * old_r5) >> 4;
    uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
    uint32_t dg = (0x1041 * old_g6) >> 2;
    uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
    uint32_t db = (0x8421 * old_b5) >> 4;

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (premul) over dst (premul).
    dr = sr + ((dr * ia) / 0xFFFF);
    dg = sg + ((dg * ia) / 0xFFFF);
    db = sb + ((db * ia) / 0xFFFF);

    // Convert from 16-bit color to 565 color and combine the components.
    uint32_t new_r5 = 0x1F & (dr >> 11);
    uint32_t new_g6 = 0x3F & (dg >> 10);
    uint32_t new_b5 = 0x1F & (db >> 11);
    uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)new_rgb_565);

    s += 1 * 4;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__y(uint8_t* dst_ptr,
                                       size_t dst_len,
                                       uint8_t* dst_palette_ptr,
                                       size_t dst_palette_len,
                                       const uint8_t* src_ptr,
                                       size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t len = (dst_len2 < src_len) ? dst_len2 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t y5 = (uint32_t)(s[0] >> 3);
    uint32_t y6 = (uint32_t)(s[0] >> 2);
    uint32_t rgb_565 = (y5 << 11) | (y6 << 5) | (y5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);

    s += 1 * 1;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__y_16be(uint8_t* dst_ptr,
                                            size_t dst_len,
                                            uint8_t* dst_palette_ptr,
                                            size_t dst_palette_len,
                                            const uint8_t* src_ptr,
                                            size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len2 < src_len2) ? dst_len2 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t y5 = (uint32_t)(s[0] >> 3);
    uint32_t y6 = (uint32_t)(s[0] >> 2);
    uint32_t rgb_565 = (y5 << 11) | (y6 << 5) | (y5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);

    s += 1 * 2;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__ya_nonpremul__src(uint8_t* dst_ptr,
                                                       size_t dst_len,
                                                       uint8_t* dst_palette_ptr,
                                                       size_t dst_palette_len,
                                                       const uint8_t* src_ptr,
                                                       size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len2 < src_len2) ? dst_len2 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);

    wuffs_base__poke_u16le__no_bounds_check(
        d + (0 * 2),
        wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
            wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
                s0)));

    s += 1 * 2;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__ya_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len2 < src_len2) ? dst_len2 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t sa = 0x101 * ((uint32_t)s[1]);
    uint32_t sy = 0x101 * ((uint32_t)s[0]);

    // Convert from 565 color to 16-bit color.
    uint32_t old_rgb_565 = wuffs_base__peek_u16le__no_bounds_check(d + (0 * 2));
    uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
    uint32_t dr = (0x8421 * old_r5) >> 4;
    uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
    uint32_t dg = (0x1041 * old_g6) >> 2;
    uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
    uint32_t db = (0x8421 * old_b5) >> 4;

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (nonpremul) over dst (premul).
    dr = ((sy * sa) + (dr * ia)) / 0xFFFF;
    dg = ((sy * sa) + (dg * ia)) / 0xFFFF;
    db = ((sy * sa) + (db * ia)) / 0xFFFF;

    // Convert from 16-bit color to 565 color and combine the components.
    uint32_t new_r5 = 0x1F & (dr >> 11);
    uint32_t new_g6 = 0x3F & (dg >> 10);
    uint32_t new_b5 = 0x1F & (db >> 11);
    uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)new_rgb_565);

    s += 1 * 2;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__index__src(uint8_t* dst_ptr,
                                                size_t dst_len,
                                                uint8_t* dst_palette_ptr,
                                                size_t dst_palette_len,
                                                const uint8_t* src_ptr,
                                                size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len2 = dst_len / 2;
  size_t len = (dst_len2 < src_len) ? dst_len2 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  const size_t loop_unroll_count = 4;

  while (n >= loop_unroll_count) {
    wuffs_base__poke_u16le__no_bounds_check(
        d + (0 * 2), wuffs_base__peek_u16le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[0] * 4)));
    wuffs_base__poke_u16le__no_bounds_check(
        d + (1 * 2), wuffs_base__peek_u16le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[1] * 4)));
    wuffs_base__poke_u16le__no_bounds_check(
        d + (2 * 2), wuffs_base__peek_u16le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[2] * 4)));
    wuffs_base__poke_u16le__no_bounds_check(
        d + (3 * 2), wuffs_base__peek_u16le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[3] * 4)));

    s += loop_unroll_count * 1;
    d += loop_unroll_count * 2;
    n -= loop_unroll_count;
  }

  while (n >= 1) {
    wuffs_base__poke_u16le__no_bounds_check(
        d + (0 * 2), wuffs_base__peek_u16le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[0] * 4)));

    s += 1 * 1;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__index_bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len2 = dst_len / 2;
  size_t len = (dst_len2 < src_len) ? dst_len2 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(
        wuffs_base__peek_u16le__no_bounds_check(d + (0 * 2)));
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    wuffs_base__poke_u16le__no_bounds_check(
        d + (0 * 2),
        wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
            wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0)));

    s += 1 * 1;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr_565__index_binary_alpha__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len2 = dst_len / 2;
  size_t len = (dst_len2 < src_len) ? dst_len2 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    if (s0) {
      wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)s0);
    }

    s += 1 * 1;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_bgr__bgr_565(uint8_t* dst_ptr,
                                         size_t dst_len,
                                         uint8_t* dst_palette_ptr,
                                         size_t dst_palette_len,
                                         const uint8_t* src_ptr,
                                         size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len3 < src_len2) ? dst_len3 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(
        wuffs_base__peek_u16le__no_bounds_check(s + (0 * 2)));
    wuffs_base__poke_u24le__no_bounds_check(d + (0 * 3), s0);

    s += 1 * 2;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__bgra_nonpremul__src(uint8_t* dst_ptr,
                                                     size_t dst_len,
                                                     uint8_t* dst_palette_ptr,
                                                     size_t dst_palette_len,
                                                     const uint8_t* src_ptr,
                                                     size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 =
        wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
            wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    wuffs_base__poke_u24le__no_bounds_check(d + (0 * 3), s0);

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__bgra_nonpremul_4x16le__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len3 < src_len8) ? dst_len3 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 =
        wuffs_base__color_u64_argb_nonpremul__as__color_u32_argb_premul(
            wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8)));
    wuffs_base__poke_u24le__no_bounds_check(d + (0 * 3), s0);

    s += 1 * 8;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t dr = 0x101 * ((uint32_t)d[2]);
    uint32_t dg = 0x101 * ((uint32_t)d[1]);
    uint32_t db = 0x101 * ((uint32_t)d[0]);
    uint32_t sa = 0x101 * ((uint32_t)s[3]);
    uint32_t sr = 0x101 * ((uint32_t)s[2]);
    uint32_t sg = 0x101 * ((uint32_t)s[1]);
    uint32_t sb = 0x101 * ((uint32_t)s[0]);

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (nonpremul) over dst (premul).
    dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
    dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
    db = ((sb * sa) + (db * ia)) / 0xFFFF;

    // Convert from 16-bit color to 8-bit color.
    d[0] = (uint8_t)(db >> 8);
    d[1] = (uint8_t)(dg >> 8);
    d[2] = (uint8_t)(dr >> 8);

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__bgra_nonpremul_4x16le__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len3 < src_len8) ? dst_len3 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t dr = 0x101 * ((uint32_t)d[2]);
    uint32_t dg = 0x101 * ((uint32_t)d[1]);
    uint32_t db = 0x101 * ((uint32_t)d[0]);
    uint32_t sa = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 6));
    uint32_t sr = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 4));
    uint32_t sg = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 2));
    uint32_t sb = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 0));

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (nonpremul) over dst (premul).
    dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
    dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
    db = ((sb * sa) + (db * ia)) / 0xFFFF;

    // Convert from 16-bit color to 8-bit color.
    d[0] = (uint8_t)(db >> 8);
    d[1] = (uint8_t)(dg >> 8);
    d[2] = (uint8_t)(dr >> 8);

    s += 1 * 8;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__bgra_premul__src(uint8_t* dst_ptr,
                                                  size_t dst_len,
                                                  uint8_t* dst_palette_ptr,
                                                  size_t dst_palette_len,
                                                  const uint8_t* src_ptr,
                                                  size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    d[0] = s0;
    d[1] = s1;
    d[2] = s2;

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__bgra_premul__src_over(uint8_t* dst_ptr,
                                                       size_t dst_len,
                                                       uint8_t* dst_palette_ptr,
                                                       size_t dst_palette_len,
                                                       const uint8_t* src_ptr,
                                                       size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t dr = 0x101 * ((uint32_t)d[2]);
    uint32_t dg = 0x101 * ((uint32_t)d[1]);
    uint32_t db = 0x101 * ((uint32_t)d[0]);
    uint32_t sa = 0x101 * ((uint32_t)s[3]);
    uint32_t sr = 0x101 * ((uint32_t)s[2]);
    uint32_t sg = 0x101 * ((uint32_t)s[1]);
    uint32_t sb = 0x101 * ((uint32_t)s[0]);

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (premul) over dst (premul).
    dr = sr + ((dr * ia) / 0xFFFF);
    dg = sg + ((dg * ia) / 0xFFFF);
    db = sb + ((db * ia) / 0xFFFF);

    // Convert from 16-bit color to 8-bit color.
    d[0] = (uint8_t)(db >> 8);
    d[1] = (uint8_t)(dg >> 8);
    d[2] = (uint8_t)(dr >> 8);

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__rgba_nonpremul__src(uint8_t* dst_ptr,
                                                     size_t dst_len,
                                                     uint8_t* dst_palette_ptr,
                                                     size_t dst_palette_len,
                                                     const uint8_t* src_ptr,
                                                     size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
            wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4))));
    wuffs_base__poke_u24le__no_bounds_check(d + (0 * 3), s0);

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__rgba_nonpremul_4x16le__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len3 < src_len8) ? dst_len3 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__color_u64_argb_nonpremul__as__color_u32_argb_premul(
            wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8))));
    wuffs_base__poke_u24le__no_bounds_check(d + (0 * 3), s0);

    s += 1 * 8;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__rgba_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t dr = 0x101 * ((uint32_t)d[2]);
    uint32_t dg = 0x101 * ((uint32_t)d[1]);
    uint32_t db = 0x101 * ((uint32_t)d[0]);
    uint32_t sa = 0x101 * ((uint32_t)s[3]);
    uint32_t sb = 0x101 * ((uint32_t)s[2]);
    uint32_t sg = 0x101 * ((uint32_t)s[1]);
    uint32_t sr = 0x101 * ((uint32_t)s[0]);

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (nonpremul) over dst (premul).
    dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
    dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
    db = ((sb * sa) + (db * ia)) / 0xFFFF;

    // Convert from 16-bit color to 8-bit color.
    d[0] = (uint8_t)(db >> 8);
    d[1] = (uint8_t)(dg >> 8);
    d[2] = (uint8_t)(dr >> 8);

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__rgba_nonpremul_4x16le__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len3 < src_len8) ? dst_len3 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t dr = 0x101 * ((uint32_t)d[2]);
    uint32_t dg = 0x101 * ((uint32_t)d[1]);
    uint32_t db = 0x101 * ((uint32_t)d[0]);
    uint32_t sa = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 6));
    uint32_t sb = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 4));
    uint32_t sg = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 2));
    uint32_t sr = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 0));

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (nonpremul) over dst (premul).
    dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
    dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
    db = ((sb * sa) + (db * ia)) / 0xFFFF;

    // Convert from 16-bit color to 8-bit color.
    d[0] = (uint8_t)(db >> 8);
    d[1] = (uint8_t)(dg >> 8);
    d[2] = (uint8_t)(dr >> 8);

    s += 1 * 8;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__rgba_premul__src(uint8_t* dst_ptr,
                                                  size_t dst_len,
                                                  uint8_t* dst_palette_ptr,
                                                  size_t dst_palette_len,
                                                  const uint8_t* src_ptr,
                                                  size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    d[0] = s2;
    d[1] = s1;
    d[2] = s0;

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__rgba_premul__src_over(uint8_t* dst_ptr,
                                                       size_t dst_len,
                                                       uint8_t* dst_palette_ptr,
                                                       size_t dst_palette_len,
                                                       const uint8_t* src_ptr,
                                                       size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t dr = 0x101 * ((uint32_t)d[2]);
    uint32_t dg = 0x101 * ((uint32_t)d[1]);
    uint32_t db = 0x101 * ((uint32_t)d[0]);
    uint32_t sa = 0x101 * ((uint32_t)s[3]);
    uint32_t sb = 0x101 * ((uint32_t)s[2]);
    uint32_t sg = 0x101 * ((uint32_t)s[1]);
    uint32_t sr = 0x101 * ((uint32_t)s[0]);

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (premul) over dst (premul).
    dr = sr + ((dr * ia) / 0xFFFF);
    dg = sg + ((dg * ia) / 0xFFFF);
    db = sb + ((db * ia) / 0xFFFF);

    // Convert from 16-bit color to 8-bit color.
    d[0] = (uint8_t)(db >> 8);
    d[1] = (uint8_t)(dg >> 8);
    d[2] = (uint8_t)(dr >> 8);

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgr__rgbx(uint8_t* dst_ptr,
                                      size_t dst_len,
                                      uint8_t* dst_palette_ptr,
                                      size_t dst_palette_len,
                                      const uint8_t* src_ptr,
                                      size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint8_t b0 = s[0];
    uint8_t b1 = s[1];
    uint8_t b2 = s[2];
    d[0] = b2;
    d[1] = b1;
    d[2] = b0;

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_nonpremul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__bgra_nonpremul_4x16le__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len4 < src_len8) ? dst_len4 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4), wuffs_base__color_u64__as__color_u32(
                         wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8))));

    s += 1 * 8;
    d += 1 * 4;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__bgra_nonpremul_4x16le__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len4 < src_len8) ? dst_len4 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint64_t d0 = wuffs_base__color_u32__as__color_u64(
        wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4)));
    uint64_t s0 = wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u64__as__color_u32(
            wuffs_private_impl__composite_nonpremul_nonpremul_u64_axxx(d0,
                                                                       s0)));

    s += 1 * 8;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__bgra_premul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul(s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__bgra_premul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_nonpremul_premul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__index_bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len4 = dst_len / 4;
  size_t len = (dst_len4 < src_len) ? dst_len4 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_nonpremul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 1;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__rgba_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_nonpremul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__rgba_premul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul(s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__rgba_premul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_nonpremul_premul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__ya_nonpremul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len4 < src_len2) ? dst_len4 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);
    wuffs_base__poke_u32le__no_bounds_check(d + (0 * 4), s0);

    s += 1 * 2;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul__ya_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len4 < src_len2) ? dst_len4 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_nonpremul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 2;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_nonpremul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len8 < src_len4) ? dst_len8 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    uint8_t s3 = s[3];
    d[0] = s0;
    d[1] = s0;
    d[2] = s1;
    d[3] = s1;
    d[4] = s2;
    d[5] = s2;
    d[6] = s3;
    d[7] = s3;

    s += 1 * 4;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len8 < src_len4) ? dst_len8 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint64_t d0 = wuffs_base__peek_u64le__no_bounds_check(d + (0 * 8));
    uint64_t s0 = wuffs_base__color_u32__as__color_u64(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8),
        wuffs_private_impl__composite_nonpremul_nonpremul_u64_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_nonpremul_4x16le__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len8 < src_len8) ? dst_len8 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint64_t d0 = wuffs_base__peek_u64le__no_bounds_check(d + (0 * 8));
    uint64_t s0 = wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8));
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8),
        wuffs_private_impl__composite_nonpremul_nonpremul_u64_axxx(d0, s0));

    s += 1 * 8;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_premul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len8 < src_len4) ? dst_len8 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint64_t s0 = wuffs_base__color_u32__as__color_u64(
        wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul(
            wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4))));
    wuffs_base__poke_u64le__no_bounds_check(d + (0 * 8), s0);

    s += 1 * 4;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_premul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len8 < src_len4) ? dst_len8 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint64_t d0 = wuffs_base__peek_u64le__no_bounds_check(d + (0 * 8));
    uint64_t s0 = wuffs_base__color_u32__as__color_u64(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8),
        wuffs_private_impl__composite_nonpremul_premul_u64_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__index_bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len8 = dst_len / 8;
  size_t len = (dst_len8 < src_len) ? dst_len8 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint64_t d0 = wuffs_base__peek_u64le__no_bounds_check(d + (0 * 8));
    uint64_t s0 = wuffs_base__color_u32__as__color_u64(
        wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                ((size_t)s[0] * 4)));
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8),
        wuffs_private_impl__composite_nonpremul_nonpremul_u64_axxx(d0, s0));

    s += 1 * 1;
    d += 1 * 8;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__rgba_nonpremul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len8 < src_len4) ? dst_len8 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    uint8_t s3 = s[3];
    d[0] = s2;
    d[1] = s2;
    d[2] = s1;
    d[3] = s1;
    d[4] = s0;
    d[5] = s0;
    d[6] = s3;
    d[7] = s3;

    s += 1 * 4;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__rgba_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len8 < src_len4) ? dst_len8 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint64_t d0 = wuffs_base__peek_u64le__no_bounds_check(d + (0 * 8));
    uint64_t s0 = wuffs_base__color_u32__as__color_u64(
        wuffs_private_impl__swap_u32_argb_abgr(
            wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4))));
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8),
        wuffs_private_impl__composite_nonpremul_nonpremul_u64_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__rgba_premul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len8 < src_len4) ? dst_len8 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint64_t s0 = wuffs_base__color_u32__as__color_u64(
        wuffs_base__color_u32_argb_premul__as__color_u32_argb_nonpremul(
            wuffs_private_impl__swap_u32_argb_abgr(
                wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)))));
    wuffs_base__poke_u64le__no_bounds_check(d + (0 * 8), s0);

    s += 1 * 4;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__rgba_premul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len8 < src_len4) ? dst_len8 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint64_t d0 = wuffs_base__peek_u64le__no_bounds_check(d + (0 * 8));
    uint64_t s0 = wuffs_base__color_u32__as__color_u64(
        wuffs_private_impl__swap_u32_argb_abgr(
            wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4))));
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8),
        wuffs_private_impl__composite_nonpremul_premul_u64_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__ya_nonpremul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len8 < src_len2) ? dst_len8 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint64_t s0 = ((uint64_t)(s[1]) * 0x0101000000000000) |
                  ((uint64_t)(s[0]) * 0x0000010101010101);
    wuffs_base__poke_u64le__no_bounds_check(d + (0 * 8), s0);

    s += 1 * 2;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__ya_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len8 < src_len2) ? dst_len8 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    uint64_t d0 = wuffs_base__peek_u64le__no_bounds_check(d + (0 * 8));
    uint64_t s0 = ((uint64_t)(s[1]) * 0x0101000000000000) |
                  ((uint64_t)(s[0]) * 0x0000010101010101);
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8),
        wuffs_private_impl__composite_nonpremul_nonpremul_u64_axxx(d0, s0));

    s += 1 * 2;
    d += 1 * 8;
    n -= 1;
  }
  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul_4x16le__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len4 < src_len8) ? dst_len4 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint64_t s0 = wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u64_argb_nonpremul__as__color_u32_argb_premul(s0));

    s += 1 * 8;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul_4x16le__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len4 < src_len8) ? dst_len4 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint64_t d0 = wuffs_base__color_u32__as__color_u64(
        wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4)));
    uint64_t s0 = wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u64__as__color_u32(
            wuffs_private_impl__composite_premul_nonpremul_u64_axxx(d0, s0)));

    s += 1 * 8;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__bgra_premul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_premul_premul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__index_bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len4 = dst_len / 4;
  size_t len = (dst_len4 < src_len) ? dst_len4 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 1;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul_4x16le__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len4 < src_len8) ? dst_len4 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint64_t s0 = wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__swap_u32_argb_abgr(
            wuffs_base__color_u64_argb_nonpremul__as__color_u32_argb_premul(
                s0)));

    s += 1 * 8;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul_4x16le__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len4 < src_len8) ? dst_len4 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint64_t d0 = wuffs_base__color_u32__as__color_u64(
        wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4)));
    uint64_t s0 = wuffs_private_impl__swap_u64_argb_abgr(
        wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u64__as__color_u32(
            wuffs_private_impl__composite_premul_nonpremul_u64_axxx(d0, s0)));

    s += 1 * 8;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__rgba_premul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_premul_premul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__ya_nonpremul__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len4 < src_len2) ? dst_len4 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));

    s += 1 * 2;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgra_premul__ya_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len4 < src_len2) ? dst_len4 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4));
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 2;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_bgrw__bgr(uint8_t* dst_ptr,
                                      size_t dst_len,
                                      uint8_t* dst_palette_ptr,
                                      size_t dst_palette_len,
                                      const uint8_t* src_ptr,
                                      size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len4 < src_len3) ? dst_len4 : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        0xFF000000 | wuffs_base__peek_u24le__no_bounds_check(s + (0 * 3)));

    s += 1 * 3;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgrw__bgr_565(uint8_t* dst_ptr,
                                          size_t dst_len,
                                          uint8_t* dst_palette_ptr,
                                          size_t dst_palette_len,
                                          const uint8_t* src_ptr,
                                          size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len4 < src_len2) ? dst_len4 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4), wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(
                         wuffs_base__peek_u16le__no_bounds_check(s + (0 * 2))));

    s += 1 * 2;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgrw__bgrx(uint8_t* dst_ptr,
                                       size_t dst_len,
                                       uint8_t* dst_palette_ptr,
                                       size_t dst_palette_len,
                                       const uint8_t* src_ptr,
                                       size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        0xFF000000 | wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
static uint64_t  //
wuffs_private_impl__swizzle_bgrw__bgr__x86_sse42(uint8_t* dst_ptr,
                                                 size_t dst_len,
                                                 uint8_t* dst_palette_ptr,
                                                 size_t dst_palette_len,
                                                 const uint8_t* src_ptr,
                                                 size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len4 < src_len3) ? dst_len4 : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  __m128i shuffle = _mm_set_epi8(+0x00, +0x0B, +0x0A, +0x09,  //
                                 +0x00, +0x08, +0x07, +0x06,  //
                                 +0x00, +0x05, +0x04, +0x03,  //
                                 +0x00, +0x02, +0x01, +0x00);
  __m128i or_ff = _mm_set_epi8(-0x01, +0x00, +0x00, +0x00,  //
                               -0x01, +0x00, +0x00, +0x00,  //
                               -0x01, +0x00, +0x00, +0x00,  //
                               -0x01, +0x00, +0x00, +0x00);

  while (n >= 6) {
    __m128i x;
    x = _mm_lddqu_si128((const __m128i*)(const void*)s);
    x = _mm_shuffle_epi8(x, shuffle);
    x = _mm_or_si128(x, or_ff);
    _mm_storeu_si128((__m128i*)(void*)d, x);

    s += 4 * 3;
    d += 4 * 4;
    n -= 4;
  }

  while (n >= 1) {
    uint8_t b0 = s[0];
    uint8_t b1 = s[1];
    uint8_t b2 = s[2];
    d[0] = b0;
    d[1] = b1;
    d[2] = b2;
    d[3] = 0xFF;

    s += 1 * 3;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
static uint64_t  //
wuffs_private_impl__swizzle_bgrw__rgb__x86_sse42(uint8_t* dst_ptr,
                                                 size_t dst_len,
                                                 uint8_t* dst_palette_ptr,
                                                 size_t dst_palette_len,
                                                 const uint8_t* src_ptr,
                                                 size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len4 < src_len3) ? dst_len4 : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  __m128i shuffle = _mm_set_epi8(+0x00, +0x09, +0x0A, +0x0B,  //
                                 +0x00, +0x06, +0x07, +0x08,  //
                                 +0x00, +0x03, +0x04, +0x05,  //
                                 +0x00, +0x00, +0x01, +0x02);
  __m128i or_ff = _mm_set_epi8(-0x01, +0x00, +0x00, +0x00,  //
                               -0x01, +0x00, +0x00, +0x00,  //
                               -0x01, +0x00, +0x00, +0x00,  //
                               -0x01, +0x00, +0x00, +0x00);

  while (n >= 6) {
    __m128i x;
    x = _mm_lddqu_si128((const __m128i*)(const void*)s);
    x = _mm_shuffle_epi8(x, shuffle);
    x = _mm_or_si128(x, or_ff);
    _mm_storeu_si128((__m128i*)(void*)d, x);

    s += 4 * 3;
    d += 4 * 4;
    n -= 4;
  }

  while (n >= 1) {
    uint8_t b0 = s[0];
    uint8_t b1 = s[1];
    uint8_t b2 = s[2];
    d[0] = b2;
    d[1] = b1;
    d[2] = b0;
    d[3] = 0xFF;

    s += 1 * 3;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

static uint64_t  //
wuffs_private_impl__swizzle_bgrw__rgb(uint8_t* dst_ptr,
                                      size_t dst_len,
                                      uint8_t* dst_palette_ptr,
                                      size_t dst_palette_len,
                                      const uint8_t* src_ptr,
                                      size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len4 < src_len3) ? dst_len4 : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint8_t b0 = s[0];
    uint8_t b1 = s[1];
    uint8_t b2 = s[2];
    d[0] = b2;
    d[1] = b1;
    d[2] = b0;
    d[3] = 0xFF;

    s += 1 * 3;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgrw__rgbx(uint8_t* dst_ptr,
                                       size_t dst_len,
                                       uint8_t* dst_palette_ptr,
                                       size_t dst_palette_len,
                                       const uint8_t* src_ptr,
                                       size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len4 < src_len4) ? dst_len4 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint8_t b0 = s[0];
    uint8_t b1 = s[1];
    uint8_t b2 = s[2];
    d[0] = b2;
    d[1] = b1;
    d[2] = b0;
    d[3] = 0xFF;

    s += 1 * 4;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_bgrw_4x16le__bgr(uint8_t* dst_ptr,
                                             size_t dst_len,
                                             uint8_t* dst_palette_ptr,
                                             size_t dst_palette_len,
                                             const uint8_t* src_ptr,
                                             size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len8 < src_len3) ? dst_len8 : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    d[0] = s0;
    d[1] = s0;
    d[2] = s1;
    d[3] = s1;
    d[4] = s2;
    d[5] = s2;
    d[6] = 0xFF;
    d[7] = 0xFF;

    s += 1 * 3;
    d += 1 * 8;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgrw_4x16le__bgr_565(uint8_t* dst_ptr,
                                                 size_t dst_len,
                                                 uint8_t* dst_palette_ptr,
                                                 size_t dst_palette_len,
                                                 const uint8_t* src_ptr,
                                                 size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len8 < src_len2) ? dst_len8 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8),
        wuffs_base__color_u32__as__color_u64(
            wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(
                wuffs_base__peek_u16le__no_bounds_check(s + (0 * 2)))));

    s += 1 * 2;
    d += 1 * 8;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgrw_4x16le__bgrx(uint8_t* dst_ptr,
                                              size_t dst_len,
                                              uint8_t* dst_palette_ptr,
                                              size_t dst_palette_len,
                                              const uint8_t* src_ptr,
                                              size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len8 < src_len4) ? dst_len8 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    d[0] = s0;
    d[1] = s0;
    d[2] = s1;
    d[3] = s1;
    d[4] = s2;
    d[5] = s2;
    d[6] = 0xFF;
    d[7] = 0xFF;

    s += 1 * 4;
    d += 1 * 8;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_bgrw_4x16le__rgb(uint8_t* dst_ptr,
                                             size_t dst_len,
                                             uint8_t* dst_palette_ptr,
                                             size_t dst_palette_len,
                                             const uint8_t* src_ptr,
                                             size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len8 < src_len3) ? dst_len8 : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    uint8_t s2 = s[2];
    d[0] = s2;
    d[1] = s2;
    d[2] = s1;
    d[3] = s1;
    d[4] = s0;
    d[5] = s0;
    d[6] = 0xFF;
    d[7] = 0xFF;

    s += 1 * 3;
    d += 1 * 8;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_rgb__bgr_565(uint8_t* dst_ptr,
                                         size_t dst_len,
                                         uint8_t* dst_palette_ptr,
                                         size_t dst_palette_len,
                                         const uint8_t* src_ptr,
                                         size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len3 < src_len2) ? dst_len3 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u24le__no_bounds_check(
        d + (0 * 3),
        wuffs_private_impl__swap_u32_argb_abgr(
            wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(
                wuffs_base__peek_u16le__no_bounds_check(s + (0 * 2)))));

    s += 1 * 2;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_rgba_nonpremul__bgra_nonpremul_4x16le__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len4 < src_len8) ? dst_len4 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;

  size_t n = len;
  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__color_u64__as__color_u32__swap_u32_argb_abgr(
            wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8))));

    s += 1 * 8;
    d += 1 * 4;
    n -= 1;
  }
  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_rgba_nonpremul__bgra_nonpremul_4x16le__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len4 < src_len8) ? dst_len4 : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint64_t d0 = wuffs_base__color_u32__as__color_u64(
        wuffs_base__peek_u32le__no_bounds_check(d + (0 * 4)));
    uint64_t s0 = wuffs_private_impl__swap_u64_argb_abgr(
        wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_base__color_u64__as__color_u32(
            wuffs_private_impl__composite_nonpremul_nonpremul_u64_axxx(d0,
                                                                       s0)));

    s += 1 * 8;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_rgbw__bgr_565(uint8_t* dst_ptr,
                                          size_t dst_len,
                                          uint8_t* dst_palette_ptr,
                                          size_t dst_palette_len,
                                          const uint8_t* src_ptr,
                                          size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len4 < src_len2) ? dst_len4 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4),
        wuffs_private_impl__swap_u32_argb_abgr(
            wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(
                wuffs_base__peek_u16le__no_bounds_check(s + (0 * 2)))));

    s += 1 * 2;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_xxx__index__src(uint8_t* dst_ptr,
                                            size_t dst_len,
                                            uint8_t* dst_palette_ptr,
                                            size_t dst_palette_len,
                                            const uint8_t* src_ptr,
                                            size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len3 = dst_len / 3;
  size_t len = (dst_len3 < src_len) ? dst_len3 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  const size_t loop_unroll_count = 4;

  // The comparison in the while condition is ">", not ">=", because with
  // ">=", the last 4-byte store could write past the end of the dst slice.
  //
  // Each 4-byte store writes one too many bytes, but a subsequent store
  // will overwrite that with the correct byte. There is always another
  // store, whether a 4-byte store in this loop or a 1-byte store in the
  // next loop.
  while (n > loop_unroll_count) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 3), wuffs_base__peek_u32le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[0] * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (1 * 3), wuffs_base__peek_u32le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[1] * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (2 * 3), wuffs_base__peek_u32le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[2] * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (3 * 3), wuffs_base__peek_u32le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[3] * 4)));

    s += loop_unroll_count * 1;
    d += loop_unroll_count * 3;
    n -= loop_unroll_count;
  }

  while (n >= 1) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    wuffs_base__poke_u24le__no_bounds_check(d + (0 * 3), s0);

    s += 1 * 1;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxx__index_bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len3 = dst_len / 3;
  size_t len = (dst_len3 < src_len) ? dst_len3 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 =
        wuffs_base__peek_u24le__no_bounds_check(d + (0 * 3)) | 0xFF000000;
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    wuffs_base__poke_u24le__no_bounds_check(
        d + (0 * 3),
        wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 1;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxx__index_binary_alpha__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len3 = dst_len / 3;
  size_t len = (dst_len3 < src_len) ? dst_len3 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  const size_t loop_unroll_count = 4;

  while (n >= loop_unroll_count) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    if (s0) {
      wuffs_base__poke_u24le__no_bounds_check(d + (0 * 3), s0);
    }
    uint32_t s1 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[1] * 4));
    if (s1) {
      wuffs_base__poke_u24le__no_bounds_check(d + (1 * 3), s1);
    }
    uint32_t s2 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[2] * 4));
    if (s2) {
      wuffs_base__poke_u24le__no_bounds_check(d + (2 * 3), s2);
    }
    uint32_t s3 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[3] * 4));
    if (s3) {
      wuffs_base__poke_u24le__no_bounds_check(d + (3 * 3), s3);
    }

    s += loop_unroll_count * 1;
    d += loop_unroll_count * 3;
    n -= loop_unroll_count;
  }

  while (n >= 1) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    if (s0) {
      wuffs_base__poke_u24le__no_bounds_check(d + (0 * 3), s0);
    }

    s += 1 * 1;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxx__xxxx(uint8_t* dst_ptr,
                                      size_t dst_len,
                                      uint8_t* dst_palette_ptr,
                                      size_t dst_palette_len,
                                      const uint8_t* src_ptr,
                                      size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len3 < src_len4) ? dst_len3 : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    wuffs_base__poke_u24le__no_bounds_check(
        d + (0 * 3), wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));

    s += 1 * 4;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxx__y(uint8_t* dst_ptr,
                                   size_t dst_len,
                                   uint8_t* dst_palette_ptr,
                                   size_t dst_palette_len,
                                   const uint8_t* src_ptr,
                                   size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t len = (dst_len3 < src_len) ? dst_len3 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint8_t s0 = s[0];
    d[0] = s0;
    d[1] = s0;
    d[2] = s0;

    s += 1 * 1;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxx__y_16be(uint8_t* dst_ptr,
                                        size_t dst_len,
                                        uint8_t* dst_palette_ptr,
                                        size_t dst_palette_len,
                                        const uint8_t* src_ptr,
                                        size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len3 < src_len2) ? dst_len3 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint8_t s0 = s[0];
    d[0] = s0;
    d[1] = s0;
    d[2] = s0;

    s += 1 * 2;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxx__ya_nonpremul__src(uint8_t* dst_ptr,
                                                   size_t dst_len,
                                                   uint8_t* dst_palette_ptr,
                                                   size_t dst_palette_len,
                                                   const uint8_t* src_ptr,
                                                   size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len3 < src_len2) ? dst_len3 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);
    wuffs_base__poke_u24le__no_bounds_check(
        d + (0 * 3),
        wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));

    s += 1 * 2;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxx__ya_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len3 = dst_len / 3;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len3 < src_len2) ? dst_len3 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 =
        wuffs_base__peek_u24le__no_bounds_check(d + (0 * 3)) | 0xFF000000;
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);
    wuffs_base__poke_u24le__no_bounds_check(
        d + (0 * 3),
        wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 2;
    d += 1 * 3;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_xxxx__index__src(uint8_t* dst_ptr,
                                             size_t dst_len,
                                             uint8_t* dst_palette_ptr,
                                             size_t dst_palette_len,
                                             const uint8_t* src_ptr,
                                             size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len4 = dst_len / 4;
  size_t len = (dst_len4 < src_len) ? dst_len4 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  const size_t loop_unroll_count = 4;

  while (n >= loop_unroll_count) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4), wuffs_base__peek_u32le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[0] * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (1 * 4), wuffs_base__peek_u32le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[1] * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (2 * 4), wuffs_base__peek_u32le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[2] * 4)));
    wuffs_base__poke_u32le__no_bounds_check(
        d + (3 * 4), wuffs_base__peek_u32le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[3] * 4)));

    s += loop_unroll_count * 1;
    d += loop_unroll_count * 4;
    n -= loop_unroll_count;
  }

  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4), wuffs_base__peek_u32le__no_bounds_check(
                         dst_palette_ptr + ((size_t)s[0] * 4)));

    s += 1 * 1;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxxx__index_binary_alpha__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len4 = dst_len / 4;
  size_t len = (dst_len4 < src_len) ? dst_len4 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  const size_t loop_unroll_count = 4;

  while (n >= loop_unroll_count) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    if (s0) {
      wuffs_base__poke_u32le__no_bounds_check(d + (0 * 4), s0);
    }
    uint32_t s1 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[1] * 4));
    if (s1) {
      wuffs_base__poke_u32le__no_bounds_check(d + (1 * 4), s1);
    }
    uint32_t s2 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[2] * 4));
    if (s2) {
      wuffs_base__poke_u32le__no_bounds_check(d + (2 * 4), s2);
    }
    uint32_t s3 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[3] * 4));
    if (s3) {
      wuffs_base__poke_u32le__no_bounds_check(d + (3 * 4), s3);
    }

    s += loop_unroll_count * 1;
    d += loop_unroll_count * 4;
    n -= loop_unroll_count;
  }

  while (n >= 1) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    if (s0) {
      wuffs_base__poke_u32le__no_bounds_check(d + (0 * 4), s0);
    }

    s += 1 * 1;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
static uint64_t  //
wuffs_private_impl__swizzle_xxxx__y__x86_sse42(uint8_t* dst_ptr,
                                               size_t dst_len,
                                               uint8_t* dst_palette_ptr,
                                               size_t dst_palette_len,
                                               const uint8_t* src_ptr,
                                               size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t len = (dst_len4 < src_len) ? dst_len4 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  __m128i shuffle = _mm_set_epi8(+0x03, +0x03, +0x03, +0x03,  //
                                 +0x02, +0x02, +0x02, +0x02,  //
                                 +0x01, +0x01, +0x01, +0x01,  //
                                 +0x00, +0x00, +0x00, +0x00);
  __m128i or_ff = _mm_set_epi8(-0x01, +0x00, +0x00, +0x00,  //
                               -0x01, +0x00, +0x00, +0x00,  //
                               -0x01, +0x00, +0x00, +0x00,  //
                               -0x01, +0x00, +0x00, +0x00);

  while (n >= 4) {
    __m128i x;
    x = _mm_cvtsi32_si128((int)(wuffs_base__peek_u32le__no_bounds_check(s)));
    x = _mm_shuffle_epi8(x, shuffle);
    x = _mm_or_si128(x, or_ff);
    _mm_storeu_si128((__m128i*)(void*)d, x);

    s += 4 * 1;
    d += 4 * 4;
    n -= 4;
  }

  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4), 0xFF000000 | (0x010101 * (uint32_t)s[0]));

    s += 1 * 1;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

static uint64_t  //
wuffs_private_impl__swizzle_xxxx__y(uint8_t* dst_ptr,
                                    size_t dst_len,
                                    uint8_t* dst_palette_ptr,
                                    size_t dst_palette_len,
                                    const uint8_t* src_ptr,
                                    size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t len = (dst_len4 < src_len) ? dst_len4 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4), 0xFF000000 | (0x010101 * (uint32_t)s[0]));

    s += 1 * 1;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxxx__y_16be(uint8_t* dst_ptr,
                                         size_t dst_len,
                                         uint8_t* dst_palette_ptr,
                                         size_t dst_palette_len,
                                         const uint8_t* src_ptr,
                                         size_t src_len) {
  size_t dst_len4 = dst_len / 4;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len4 < src_len2) ? dst_len4 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    wuffs_base__poke_u32le__no_bounds_check(
        d + (0 * 4), 0xFF000000 | (0x010101 * (uint32_t)s[0]));

    s += 1 * 2;
    d += 1 * 4;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_xxxxxxxx__index__src(uint8_t* dst_ptr,
                                                 size_t dst_len,
                                                 uint8_t* dst_palette_ptr,
                                                 size_t dst_palette_len,
                                                 const uint8_t* src_ptr,
                                                 size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len8 = dst_len / 8;
  size_t len = (dst_len8 < src_len) ? dst_len8 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8), wuffs_base__color_u32__as__color_u64(
                         wuffs_base__peek_u32le__no_bounds_check(
                             dst_palette_ptr + ((size_t)s[0] * 4))));

    s += 1 * 1;
    d += 1 * 8;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxxxxxxx__index_binary_alpha__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t dst_len8 = dst_len / 8;
  size_t len = (dst_len8 < src_len) ? dst_len8 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    if (s0) {
      wuffs_base__poke_u64le__no_bounds_check(
          d + (0 * 8), wuffs_base__color_u32__as__color_u64(s0));
    }

    s += 1 * 1;
    d += 1 * 8;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxxxxxxx__y(uint8_t* dst_ptr,
                                        size_t dst_len,
                                        uint8_t* dst_palette_ptr,
                                        size_t dst_palette_len,
                                        const uint8_t* src_ptr,
                                        size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t len = (dst_len8 < src_len) ? dst_len8 : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8), 0xFFFF000000000000 | (0x010101010101 * (uint64_t)s[0]));

    s += 1 * 1;
    d += 1 * 8;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_xxxxxxxx__y_16be(uint8_t* dst_ptr,
                                             size_t dst_len,
                                             uint8_t* dst_palette_ptr,
                                             size_t dst_palette_len,
                                             const uint8_t* src_ptr,
                                             size_t src_len) {
  size_t dst_len8 = dst_len / 8;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len8 < src_len2) ? dst_len8 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint64_t s0 =
        ((uint64_t)(wuffs_base__peek_u16be__no_bounds_check(s + (0 * 2))));
    wuffs_base__poke_u64le__no_bounds_check(
        d + (0 * 8), 0xFFFF000000000000 | (0x000100010001 * s0));

    s += 1 * 2;
    d += 1 * 8;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_y__bgr(uint8_t* dst_ptr,
                                   size_t dst_len,
                                   uint8_t* dst_palette_ptr,
                                   size_t dst_palette_len,
                                   const uint8_t* src_ptr,
                                   size_t src_len) {
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len < src_len3) ? dst_len : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 =
        0xFF000000 | wuffs_base__peek_u24le__no_bounds_check(s + (0 * 3));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(s0);

    s += 1 * 3;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__bgr_565(uint8_t* dst_ptr,
                                       size_t dst_len,
                                       uint8_t* dst_palette_ptr,
                                       size_t dst_palette_len,
                                       const uint8_t* src_ptr,
                                       size_t src_len) {
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len < src_len2) ? dst_len : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(
        wuffs_base__peek_u16le__no_bounds_check(s + (0 * 2)));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(s0);

    s += 1 * 2;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__bgra_nonpremul__src(uint8_t* dst_ptr,
                                                   size_t dst_len,
                                                   uint8_t* dst_palette_ptr,
                                                   size_t dst_palette_len,
                                                   const uint8_t* src_ptr,
                                                   size_t src_len) {
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len < src_len4) ? dst_len : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 =
        wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
            wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(s0);

    s += 1 * 4;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len < src_len4) ? dst_len : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = 0xFF000000 | (0x00010101 * ((uint32_t)(d[0])));
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(
        wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__bgra_nonpremul_4x16le__src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len < src_len8) ? dst_len : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    d[0] = wuffs_base__color_u64_argb_nonpremul__as__color_u8_gray(
        wuffs_base__peek_u64le__no_bounds_check(s + (0 * 8)));

    s += 1 * 8;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__bgra_nonpremul_4x16le__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t src_len8 = src_len / 8;
  size_t len = (dst_len < src_len8) ? dst_len : src_len8;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t dr = 0x101 * ((uint32_t)d[0]);
    uint32_t dg = 0x101 * ((uint32_t)d[0]);
    uint32_t db = 0x101 * ((uint32_t)d[0]);
    uint32_t sa = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 6));
    uint32_t sr = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 4));
    uint32_t sg = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 2));
    uint32_t sb = ((uint32_t)wuffs_base__peek_u16le__no_bounds_check(s + 0));

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (nonpremul) over dst (premul).
    dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
    dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
    db = ((sb * sa) + (db * ia)) / 0xFFFF;

    // Convert to 16-bit color to 8-bit gray.
    uint32_t weighted_average =
        (19595 * dr) + (38470 * dg) + (7471 * db) + 32768;
    d[0] = (uint8_t)(weighted_average >> 24);

    s += 1 * 8;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__bgra_premul__src(uint8_t* dst_ptr,
                                                size_t dst_len,
                                                uint8_t* dst_palette_ptr,
                                                size_t dst_palette_len,
                                                const uint8_t* src_ptr,
                                                size_t src_len) {
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len < src_len4) ? dst_len : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(s0);

    s += 1 * 4;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__bgra_premul__src_over(uint8_t* dst_ptr,
                                                     size_t dst_len,
                                                     uint8_t* dst_palette_ptr,
                                                     size_t dst_palette_len,
                                                     const uint8_t* src_ptr,
                                                     size_t src_len) {
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len < src_len4) ? dst_len : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    // Extract 16-bit color components.
    uint32_t dr = 0x101 * ((uint32_t)d[0]);
    uint32_t dg = 0x101 * ((uint32_t)d[0]);
    uint32_t db = 0x101 * ((uint32_t)d[0]);
    uint32_t sa = 0x101 * ((uint32_t)s[3]);
    uint32_t sr = 0x101 * ((uint32_t)s[2]);
    uint32_t sg = 0x101 * ((uint32_t)s[1]);
    uint32_t sb = 0x101 * ((uint32_t)s[0]);

    // Calculate the inverse of the src-alpha: how much of the dst to keep.
    uint32_t ia = 0xFFFF - sa;

    // Composite src (premul) over dst (premul).
    dr = sr + ((dr * ia) / 0xFFFF);
    dg = sg + ((dg * ia) / 0xFFFF);
    db = sb + ((db * ia) / 0xFFFF);

    // Convert to 16-bit color to 8-bit gray.
    uint32_t weighted_average =
        (19595 * dr) + (38470 * dg) + (7471 * db) + 32768;
    d[0] = (uint8_t)(weighted_average >> 24);

    s += 1 * 4;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__bgrx(uint8_t* dst_ptr,
                                    size_t dst_len,
                                    uint8_t* dst_palette_ptr,
                                    size_t dst_palette_len,
                                    const uint8_t* src_ptr,
                                    size_t src_len) {
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len < src_len4) ? dst_len : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 =
        0xFF000000 | wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(s0);

    s += 1 * 4;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__rgb(uint8_t* dst_ptr,
                                   size_t dst_len,
                                   uint8_t* dst_palette_ptr,
                                   size_t dst_palette_len,
                                   const uint8_t* src_ptr,
                                   size_t src_len) {
  size_t src_len3 = src_len / 3;
  size_t len = (dst_len < src_len3) ? dst_len : src_len3;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 =
        0xFF000000 | wuffs_base__peek_u24be__no_bounds_check(s + (0 * 3));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(s0);

    s += 1 * 3;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__rgba_nonpremul__src(uint8_t* dst_ptr,
                                                   size_t dst_len,
                                                   uint8_t* dst_palette_ptr,
                                                   size_t dst_palette_len,
                                                   const uint8_t* src_ptr,
                                                   size_t src_len) {
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len < src_len4) ? dst_len : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
            wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4))));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(s0);

    s += 1 * 4;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__rgba_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len < src_len4) ? dst_len : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = 0xFF000000 | (0x00010101 * ((uint32_t)(d[0])));
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(
        wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__rgba_premul__src(uint8_t* dst_ptr,
                                                size_t dst_len,
                                                uint8_t* dst_palette_ptr,
                                                size_t dst_palette_len,
                                                const uint8_t* src_ptr,
                                                size_t src_len) {
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len < src_len4) ? dst_len : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(s0);

    s += 1 * 4;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__rgba_premul__src_over(uint8_t* dst_ptr,
                                                     size_t dst_len,
                                                     uint8_t* dst_palette_ptr,
                                                     size_t dst_palette_len,
                                                     const uint8_t* src_ptr,
                                                     size_t src_len) {
  size_t src_len4 = src_len / 4;
  size_t len = (dst_len < src_len4) ? dst_len : src_len4;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = 0xFF000000 | (0x00010101 * ((uint32_t)(d[0])));
    uint32_t s0 = wuffs_private_impl__swap_u32_argb_abgr(
        wuffs_base__peek_u32le__no_bounds_check(s + (0 * 4)));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(
        wuffs_private_impl__composite_premul_premul_u32_axxx(d0, s0));

    s += 1 * 4;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__y_16be(uint8_t* dst_ptr,
                                      size_t dst_len,
                                      uint8_t* dst_palette_ptr,
                                      size_t dst_palette_len,
                                      const uint8_t* src_ptr,
                                      size_t src_len) {
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len < src_len2) ? dst_len : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    d[0] = s[0];

    s += 1 * 2;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__ya_nonpremul__src(uint8_t* dst_ptr,
                                                 size_t dst_len,
                                                 uint8_t* dst_palette_ptr,
                                                 size_t dst_palette_len,
                                                 const uint8_t* src_ptr,
                                                 size_t src_len) {
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len < src_len2) ? dst_len : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);
    d[0] = (uint8_t)
        wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0);

    s += 1 * 2;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__ya_nonpremul__src_over(uint8_t* dst_ptr,
                                                      size_t dst_len,
                                                      uint8_t* dst_palette_ptr,
                                                      size_t dst_palette_len,
                                                      const uint8_t* src_ptr,
                                                      size_t src_len) {
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len < src_len2) ? dst_len : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = 0xFF000000 | ((uint32_t)(d[0]) * 0x010101);
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);
    d[0] = (uint8_t)wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0,
                                                                            s0);

    s += 1 * 2;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__index__src(uint8_t* dst_ptr,
                                          size_t dst_len,
                                          uint8_t* dst_palette_ptr,
                                          size_t dst_palette_len,
                                          const uint8_t* src_ptr,
                                          size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t len = (dst_len < src_len) ? dst_len : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    d[0] = dst_palette_ptr[(size_t)s[0] * 4];

    s += 1 * 1;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__index_bgra_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t len = (dst_len < src_len) ? dst_len : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t d0 = 0xFF000000 | (0x00010101 * ((uint32_t)(d[0])));
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    d[0] = wuffs_base__color_u32_argb_premul__as__color_u8_gray(
        wuffs_private_impl__composite_premul_nonpremul_u32_axxx(d0, s0));

    s += 1 * 1;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

static uint64_t  //
wuffs_private_impl__swizzle_y__index_binary_alpha__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  if (dst_palette_len !=
      WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
    return 0;
  }
  size_t len = (dst_len < src_len) ? dst_len : src_len;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  // TODO: unroll.

  while (n >= 1) {
    uint32_t s0 = wuffs_base__peek_u32le__no_bounds_check(dst_palette_ptr +
                                                          ((size_t)s[0] * 4));
    if (s0) {
      d[0] = (uint8_t)s0;
    }

    s += 1 * 1;
    d += 1 * 1;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_y_16le__y_16be(uint8_t* dst_ptr,
                                           size_t dst_len,
                                           uint8_t* dst_palette_ptr,
                                           size_t dst_palette_len,
                                           const uint8_t* src_ptr,
                                           size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len2 < src_len2) ? dst_len2 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint8_t s0 = s[0];
    uint8_t s1 = s[1];
    d[0] = s1;
    d[1] = s0;

    s += 1 * 2;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_ya_nonpremul__ya_nonpremul__src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    const uint8_t* src_ptr,
    size_t src_len) {
  size_t dst_len2 = dst_len / 2;
  size_t src_len2 = src_len / 2;
  size_t len = (dst_len2 < src_len2) ? dst_len2 : src_len2;
  uint8_t* d = dst_ptr;
  const uint8_t* s = src_ptr;
  size_t n = len;

  while (n >= 1) {
    uint32_t d0 = ((uint32_t)(d[1]) << 24) | ((uint32_t)(d[0]) * 0x010101);
    uint32_t s0 = ((uint32_t)(s[1]) << 24) | ((uint32_t)(s[0]) * 0x010101);
    uint32_t c0 =
        wuffs_private_impl__composite_nonpremul_nonpremul_u32_axxx(d0, s0);
    wuffs_base__poke_u16le__no_bounds_check(d + (0 * 2), (uint16_t)(c0 >> 16));

    s += 1 * 2;
    d += 1 * 2;
    n -= 1;
  }

  return len;
}

// --------

static uint64_t  //
wuffs_private_impl__swizzle_transparent_black_src(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    uint64_t num_pixels,
    uint32_t dst_pixfmt_bytes_per_pixel) {
  uint64_t n = ((uint64_t)dst_len) / dst_pixfmt_bytes_per_pixel;
  if (n > num_pixels) {
    n = num_pixels;
  }
  memset(dst_ptr, 0, ((size_t)(n * dst_pixfmt_bytes_per_pixel)));
  return n;
}

static uint64_t  //
wuffs_private_impl__swizzle_transparent_black_src_over(
    uint8_t* dst_ptr,
    size_t dst_len,
    uint8_t* dst_palette_ptr,
    size_t dst_palette_len,
    uint64_t num_pixels,
    uint32_t dst_pixfmt_bytes_per_pixel) {
  uint64_t n = ((uint64_t)dst_len) / dst_pixfmt_bytes_per_pixel;
  if (n > num_pixels) {
    n = num_pixels;
  }
  return n;
}

// --------

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__y(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      return wuffs_private_impl__swizzle_copy_1_1;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      return wuffs_private_impl__swizzle_bgr_565__y;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      return wuffs_private_impl__swizzle_xxx__y;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
      if (wuffs_base__cpu_arch__have_x86_sse42()) {
        return wuffs_private_impl__swizzle_xxxx__y__x86_sse42;
      }
#endif
      return wuffs_private_impl__swizzle_xxxx__y;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL_4X16LE:
      return wuffs_private_impl__swizzle_xxxxxxxx__y;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__y_16be(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      return wuffs_private_impl__swizzle_y__y_16be;

    case WUFFS_BASE__PIXEL_FORMAT__Y_16LE:
      return wuffs_private_impl__swizzle_y_16le__y_16be;

    case WUFFS_BASE__PIXEL_FORMAT__Y_16BE:
      return wuffs_private_impl__swizzle_copy_2_2;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      return wuffs_private_impl__swizzle_bgr_565__y_16be;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      return wuffs_private_impl__swizzle_xxx__y_16be;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      return wuffs_private_impl__swizzle_xxxx__y_16be;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL_4X16LE:
      return wuffs_private_impl__swizzle_xxxxxxxx__y_16be;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__ya_nonpremul(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_y__ya_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_y__ya_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__YA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_2_2;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_ya_nonpremul__ya_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr_565__ya_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr_565__ya_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_xxx__ya_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_xxx__ya_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul__ya_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__ya_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_premul__ya_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__ya_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL_4X16LE:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__ya_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__ya_nonpremul__src_over;
      }
      return NULL;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__indexed__bgra_nonpremul(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          if (wuffs_private_impl__swizzle_squash_align4_y_8888(
                  dst_palette.ptr, dst_palette.len, src_palette.ptr,
                  src_palette.len, true) !=
              (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_y__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                            src_palette) !=
              WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_y__index_bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
      if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                        src_palette) !=
          WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_1_1;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          if (wuffs_private_impl__swizzle_squash_align4_bgr_565_8888(
                  dst_palette.ptr, dst_palette.len, src_palette.ptr,
                  src_palette.len, true) !=
              (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_bgr_565__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                            src_palette) !=
              WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_bgr_565__index_bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          if (wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul__src(
                  dst_palette.ptr, dst_palette.len, NULL, 0, src_palette.ptr,
                  src_palette.len) !=
              (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_xxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                            src_palette) !=
              WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_xxx__index_bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                        src_palette) !=
          WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_xxxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__index_bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                        src_palette) !=
          WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_xxxxxxxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__index_bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          if (wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul__src(
                  dst_palette.ptr, dst_palette.len, NULL, 0, src_palette.ptr,
                  src_palette.len) !=
              (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_xxxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                            src_palette) !=
              WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_bgra_premul__index_bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          if (wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul__src(
                  dst_palette.ptr, dst_palette.len, NULL, 0, src_palette.ptr,
                  src_palette.len) !=
              (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_xxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          if (wuffs_private_impl__swizzle_swap_rgbx_bgrx(
                  dst_palette.ptr, dst_palette.len, NULL, 0, src_palette.ptr,
                  src_palette.len) !=
              (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_xxx__index_bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      if (wuffs_private_impl__swizzle_swap_rgbx_bgrx(
              dst_palette.ptr, dst_palette.len, NULL, 0, src_palette.ptr,
              src_palette.len) !=
          (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_xxxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__index_bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          if (wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul__src(
                  dst_palette.ptr, dst_palette.len, NULL, 0, src_palette.ptr,
                  src_palette.len) !=
              (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_xxxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          if (wuffs_private_impl__swizzle_swap_rgbx_bgrx(
                  dst_palette.ptr, dst_palette.len, NULL, 0, src_palette.ptr,
                  src_palette.len) !=
              (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
            return NULL;
          }
          return wuffs_private_impl__swizzle_bgra_premul__index_bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      // TODO.
      break;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__indexed__bgra_binary(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      if (wuffs_private_impl__swizzle_squash_align4_y_8888(
              dst_palette.ptr, dst_palette.len, src_palette.ptr,
              src_palette.len, false) !=
          (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_y__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_y__index_binary_alpha__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
      if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                        src_palette) !=
          WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_1_1;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      if (wuffs_private_impl__swizzle_squash_align4_bgr_565_8888(
              dst_palette.ptr, dst_palette.len, src_palette.ptr,
              src_palette.len, false) !=
          (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr_565__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr_565__index_binary_alpha__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                        src_palette) !=
          WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_xxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_xxx__index_binary_alpha__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
      if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                        src_palette) !=
          WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_xxxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_xxxx__index_binary_alpha__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL_4X16LE:
      if (wuffs_private_impl__slice_u8__copy_from_slice(dst_palette,
                                                        src_palette) !=
          WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_xxxxxxxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_xxxxxxxx__index_binary_alpha__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      if (wuffs_private_impl__swizzle_swap_rgbx_bgrx(
              dst_palette.ptr, dst_palette.len, NULL, 0, src_palette.ptr,
              src_palette.len) !=
          (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_xxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_xxx__index_binary_alpha__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
      if (wuffs_private_impl__swizzle_swap_rgbx_bgrx(
              dst_palette.ptr, dst_palette.len, NULL, 0, src_palette.ptr,
              src_palette.len) !=
          (WUFFS_BASE__PIXEL_FORMAT__INDEXED__PALETTE_BYTE_LENGTH / 4)) {
        return NULL;
      }
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_xxxx__index__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_xxxx__index_binary_alpha__src_over;
      }
      return NULL;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__bgr_565(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      return wuffs_private_impl__swizzle_y__bgr_565;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      return wuffs_private_impl__swizzle_copy_2_2;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      return wuffs_private_impl__swizzle_bgr__bgr_565;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
      return wuffs_private_impl__swizzle_bgrw__bgr_565;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL_4X16LE:
      return wuffs_private_impl__swizzle_bgrw_4x16le__bgr_565;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      return wuffs_private_impl__swizzle_rgb__bgr_565;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      return wuffs_private_impl__swizzle_rgbw__bgr_565;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__bgr(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      return wuffs_private_impl__swizzle_y__bgr;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      return wuffs_private_impl__swizzle_bgr_565__bgr;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      return wuffs_private_impl__swizzle_copy_3_3;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
      if (wuffs_base__cpu_arch__have_x86_sse42()) {
        return wuffs_private_impl__swizzle_bgrw__bgr__x86_sse42;
      }
#endif
      return wuffs_private_impl__swizzle_bgrw__bgr;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL_4X16LE:
      return wuffs_private_impl__swizzle_bgrw_4x16le__bgr;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      return wuffs_private_impl__swizzle_swap_rgb_bgr;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
      if (wuffs_base__cpu_arch__have_x86_sse42()) {
        return wuffs_private_impl__swizzle_bgrw__rgb__x86_sse42;
      }
#endif
      return wuffs_private_impl__swizzle_bgrw__rgb;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__bgra_nonpremul(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_y__bgra_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_y__bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr_565__bgra_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr_565__bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__bgra_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_4_4;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
      // TODO.
      break;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__rgba_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__rgba_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
          if (wuffs_base__cpu_arch__have_x86_sse42()) {
            return wuffs_private_impl__swizzle_swap_rgbx_bgrx__x86_sse42;
          }
#endif
          return wuffs_private_impl__swizzle_swap_rgbx_bgrx;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__rgba_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      // TODO.
      break;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__bgra_nonpremul_4x16le(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_y__bgra_nonpremul_4x16le__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_y__bgra_nonpremul_4x16le__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr_565__bgra_nonpremul_4x16le__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr_565__bgra_nonpremul_4x16le__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__bgra_nonpremul_4x16le__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__bgra_nonpremul_4x16le__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul__bgra_nonpremul_4x16le__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__bgra_nonpremul_4x16le__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_8_8;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_nonpremul_4x16le__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul_4x16le__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul_4x16le__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
      // TODO.
      break;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__rgba_nonpremul_4x16le__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__rgba_nonpremul_4x16le__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_rgba_nonpremul__bgra_nonpremul_4x16le__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_rgba_nonpremul__bgra_nonpremul_4x16le__src_over;
      }
      break;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul_4x16le__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul_4x16le__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      // TODO.
      break;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__bgra_premul(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_y__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_y__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr_565__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr_565__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_4_4;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__rgba_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul__rgba_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
          if (wuffs_base__cpu_arch__have_x86_sse42()) {
            return wuffs_private_impl__swizzle_swap_rgbx_bgrx__x86_sse42;
          }
#endif
          return wuffs_private_impl__swizzle_swap_rgbx_bgrx;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__rgba_premul__src_over;
      }
      return NULL;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__bgra_binary(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_y__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_y__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr_565__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr_565__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_4_4;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_4_4;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__rgba_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
          if (wuffs_base__cpu_arch__have_x86_sse42()) {
            return wuffs_private_impl__swizzle_swap_rgbx_bgrx__x86_sse42;
          }
#endif
          return wuffs_private_impl__swizzle_swap_rgbx_bgrx;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
          if (wuffs_base__cpu_arch__have_x86_sse42()) {
            return wuffs_private_impl__swizzle_swap_rgbx_bgrx__x86_sse42;
          }
#endif
          return wuffs_private_impl__swizzle_swap_rgbx_bgrx;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__rgba_premul__src_over;
      }
      return NULL;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__bgrx(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      return wuffs_private_impl__swizzle_y__bgrx;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      return wuffs_private_impl__swizzle_bgr_565__bgrx;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      return wuffs_private_impl__swizzle_xxx__xxxx;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
      return wuffs_private_impl__swizzle_bgrw__bgrx;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      return wuffs_private_impl__swizzle_bgrw_4x16le__bgrx;

    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
      return wuffs_private_impl__swizzle_copy_4_4;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      return wuffs_private_impl__swizzle_bgr__rgbx;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      return wuffs_private_impl__swizzle_bgrw__rgbx;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__rgb(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      return wuffs_private_impl__swizzle_y__rgb;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      return wuffs_private_impl__swizzle_bgr_565__rgb;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      return wuffs_private_impl__swizzle_swap_rgb_bgr;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
      if (wuffs_base__cpu_arch__have_x86_sse42()) {
        return wuffs_private_impl__swizzle_bgrw__rgb__x86_sse42;
      }
#endif
      return wuffs_private_impl__swizzle_bgrw__rgb;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      return wuffs_private_impl__swizzle_bgrw_4x16le__rgb;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      return wuffs_private_impl__swizzle_copy_3_3;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
      if (wuffs_base__cpu_arch__have_x86_sse42()) {
        return wuffs_private_impl__swizzle_bgrw__bgr__x86_sse42;
      }
#endif
      return wuffs_private_impl__swizzle_bgrw__bgr;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__rgba_nonpremul(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_y__rgba_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_y__rgba_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr_565__rgba_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr_565__rgba_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__rgba_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__rgba_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
          if (wuffs_base__cpu_arch__have_x86_sse42()) {
            return wuffs_private_impl__swizzle_swap_rgbx_bgrx__x86_sse42;
          }
#endif
          return wuffs_private_impl__swizzle_swap_rgbx_bgrx;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__rgba_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__rgba_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__rgba_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__rgba_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
      // TODO.
      break;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__bgra_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_4_4;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__bgra_nonpremul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      // TODO.
      break;
  }
  return NULL;
}

static inline WUFFS_BASE__FORCE_INLINE wuffs_base__pixel_swizzler__func  //
wuffs_private_impl__pixel_swizzler__prepare__rgba_premul(
    wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_format dst_pixfmt,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src_palette,
    wuffs_base__pixel_blend blend) {
  switch (dst_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_y__rgba_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_y__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr_565__rgba_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr_565__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__rgba_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul__rgba_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__rgba_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul_4x16le__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
          if (wuffs_base__cpu_arch__have_x86_sse42()) {
            return wuffs_private_impl__swizzle_swap_rgbx_bgrx__x86_sse42;
          }
#endif
          return wuffs_private_impl__swizzle_swap_rgbx_bgrx;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__rgba_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgr__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgr__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_bgra_nonpremul__bgra_premul__src;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_nonpremul__bgra_premul__src_over;
      }
      return NULL;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      switch (blend) {
        case WUFFS_BASE__PIXEL_BLEND__SRC:
          return wuffs_private_impl__swizzle_copy_4_4;
        case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
          return wuffs_private_impl__swizzle_bgra_premul__bgra_premul__src_over;
      }
      return NULL;
  }
  return NULL;
}

// --------

WUFFS_BASE__MAYBE_STATIC wuffs_base__status  //
wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p,
                                    wuffs_base__pixel_format dst_pixfmt,
                                    wuffs_base__slice_u8 dst_palette,
                                    wuffs_base__pixel_format src_pixfmt,
                                    wuffs_base__slice_u8 src_palette,
                                    wuffs_base__pixel_blend blend) {
  if (!p) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  p->private_impl.func = NULL;
  p->private_impl.transparent_black_func = NULL;
  p->private_impl.dst_pixfmt_bytes_per_pixel = 0;
  p->private_impl.src_pixfmt_bytes_per_pixel = 0;

  // ----

#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ENABLE_ALLOWLIST)
  switch (dst_pixfmt.repr) {
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_Y)
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGR_565)
    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGR)
    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGRA_NONPREMUL)
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGRA_NONPREMUL_4X16LE)
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGRA_PREMUL)
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_RGB)
    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_RGBA_NONPREMUL)
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_RGBA_PREMUL)
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      break;
#endif
    default:
      return wuffs_base__make_status(
          wuffs_base__error__disabled_by_wuffs_config_dst_pixel_format_enable_allowlist);
  }
#endif  // defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ENABLE_ALLOWLIST)

  // ----

  wuffs_base__pixel_swizzler__func func = NULL;
  wuffs_base__pixel_swizzler__transparent_black_func transparent_black_func =
      NULL;

  uint32_t dst_pixfmt_bits_per_pixel =
      wuffs_base__pixel_format__bits_per_pixel(&dst_pixfmt);
  if ((dst_pixfmt_bits_per_pixel == 0) ||
      ((dst_pixfmt_bits_per_pixel & 7) != 0)) {
    return wuffs_base__make_status(
        wuffs_base__error__unsupported_pixel_swizzler_option);
  }

  uint32_t src_pixfmt_bits_per_pixel =
      wuffs_base__pixel_format__bits_per_pixel(&src_pixfmt);
  if ((src_pixfmt_bits_per_pixel == 0) ||
      ((src_pixfmt_bits_per_pixel & 7) != 0)) {
    return wuffs_base__make_status(
        wuffs_base__error__unsupported_pixel_swizzler_option);
  }

  // TODO: support many more formats.

  switch (blend) {
    case WUFFS_BASE__PIXEL_BLEND__SRC:
      transparent_black_func =
          wuffs_private_impl__swizzle_transparent_black_src;
      break;

    case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
      transparent_black_func =
          wuffs_private_impl__swizzle_transparent_black_src_over;
      break;
  }

  switch (src_pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      func = wuffs_private_impl__pixel_swizzler__prepare__y(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__Y_16BE:
      func = wuffs_private_impl__pixel_swizzler__prepare__y_16be(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__YA_NONPREMUL:
      func = wuffs_private_impl__pixel_swizzler__prepare__ya_nonpremul(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
      func =
          wuffs_private_impl__pixel_swizzler__prepare__indexed__bgra_nonpremul(
              p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
      func = wuffs_private_impl__pixel_swizzler__prepare__indexed__bgra_binary(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      func = wuffs_private_impl__pixel_swizzler__prepare__bgr_565(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      func = wuffs_private_impl__pixel_swizzler__prepare__bgr(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      func = wuffs_private_impl__pixel_swizzler__prepare__bgra_nonpremul(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      func = wuffs_private_impl__pixel_swizzler__prepare__bgra_nonpremul_4x16le(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      func = wuffs_private_impl__pixel_swizzler__prepare__bgra_premul(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
      func = wuffs_private_impl__pixel_swizzler__prepare__bgra_binary(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
      func = wuffs_private_impl__pixel_swizzler__prepare__bgrx(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      func = wuffs_private_impl__pixel_swizzler__prepare__rgb(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      func = wuffs_private_impl__pixel_swizzler__prepare__rgba_nonpremul(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;

    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      func = wuffs_private_impl__pixel_swizzler__prepare__rgba_premul(
          p, dst_pixfmt, dst_palette, src_palette, blend);
      break;
  }

  p->private_impl.func = func;
  p->private_impl.transparent_black_func = transparent_black_func;
  p->private_impl.dst_pixfmt_bytes_per_pixel = dst_pixfmt_bits_per_pixel / 8;
  p->private_impl.src_pixfmt_bytes_per_pixel = src_pixfmt_bits_per_pixel / 8;
  return wuffs_base__make_status(
      func ? NULL : wuffs_base__error__unsupported_pixel_swizzler_option);
}

WUFFS_BASE__MAYBE_STATIC uint64_t  //
wuffs_base__pixel_swizzler__limited_swizzle_u32_interleaved_from_reader(
    const wuffs_base__pixel_swizzler* p,
    uint32_t up_to_num_pixels,
    wuffs_base__slice_u8 dst,
    wuffs_base__slice_u8 dst_palette,
    const uint8_t** ptr_iop_r,
    const uint8_t* io2_r) {
  if (p && p->private_impl.func) {
    const uint8_t* iop_r = *ptr_iop_r;
    uint64_t src_len = wuffs_base__u64__min(
        ((uint64_t)up_to_num_pixels) *
            ((uint64_t)p->private_impl.src_pixfmt_bytes_per_pixel),
        ((uint64_t)(io2_r - iop_r)));
    uint64_t n =
        (*p->private_impl.func)(dst.ptr, dst.len, dst_palette.ptr,
                                dst_palette.len, iop_r, (size_t)src_len);
    *ptr_iop_r += n * p->private_impl.src_pixfmt_bytes_per_pixel;
    return n;
  }
  return 0;
}

WUFFS_BASE__MAYBE_STATIC uint64_t  //
wuffs_base__pixel_swizzler__swizzle_interleaved_from_reader(
    const wuffs_base__pixel_swizzler* p,
    wuffs_base__slice_u8 dst,
    wuffs_base__slice_u8 dst_palette,
    const uint8_t** ptr_iop_r,
    const uint8_t* io2_r) {
  if (p && p->private_impl.func) {
    const uint8_t* iop_r = *ptr_iop_r;
    uint64_t src_len = ((uint64_t)(io2_r - iop_r));
    uint64_t n =
        (*p->private_impl.func)(dst.ptr, dst.len, dst_palette.ptr,
                                dst_palette.len, iop_r, (size_t)src_len);
    *ptr_iop_r += n * p->private_impl.src_pixfmt_bytes_per_pixel;
    return n;
  }
  return 0;
}

WUFFS_BASE__MAYBE_STATIC uint64_t  //
wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(
    const wuffs_base__pixel_swizzler* p,
    wuffs_base__slice_u8 dst,
    wuffs_base__slice_u8 dst_palette,
    wuffs_base__slice_u8 src) {
  if (p && p->private_impl.func) {
    return (*p->private_impl.func)(dst.ptr, dst.len, dst_palette.ptr,
                                   dst_palette.len, src.ptr, src.len);
  }
  return 0;
}

WUFFS_BASE__MAYBE_STATIC uint64_t  //
wuffs_base__pixel_swizzler__swizzle_interleaved_transparent_black(
    const wuffs_base__pixel_swizzler* p,
    wuffs_base__slice_u8 dst,
    wuffs_base__slice_u8 dst_palette,
    uint64_t num_pixels) {
  if (p && p->private_impl.transparent_black_func) {
    return (*p->private_impl.transparent_black_func)(
        dst.ptr, dst.len, dst_palette.ptr, dst_palette.len, num_pixels,
        p->private_impl.dst_pixfmt_bytes_per_pixel);
  }
  return 0;
}

// --------

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2,avx2")
static void  //
wuffs_private_impl__swizzle_ycc__convert_3_bgrx_x86_avx2(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2);

WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2,avx2")
static void  //
wuffs_private_impl__swizzle_ycc__convert_3_rgbx_x86_avx2(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2);

#if defined(__GNUC__) && !defined(__clang__)
// No-op.
#else
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2,avx2")
static const uint8_t*  //
wuffs_private_impl__swizzle_ycc__upsample_inv_h2v2_triangle_x86_avx2(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,
    const uint8_t* src_ptr_minor,
    size_t src_len,
    uint32_t h1v2_bias_ignored,
    bool first_column,
    bool last_column);
#endif
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)

// --------

static inline uint32_t  //
wuffs_private_impl__u32__max_of_4(uint32_t a,
                                  uint32_t b,
                                  uint32_t c,
                                  uint32_t d) {
  return wuffs_base__u32__max(     //
      wuffs_base__u32__max(a, b),  //
      wuffs_base__u32__max(c, d));
}

static inline uint32_t  //
wuffs_private_impl__u32__min_of_5(uint32_t a,
                                  uint32_t b,
                                  uint32_t c,
                                  uint32_t d,
                                  uint32_t e) {
  return wuffs_base__u32__min(          //
      wuffs_base__u32__min(             //
          wuffs_base__u32__min(a, b),   //
          wuffs_base__u32__min(c, d)),  //
      e);
}

// --------

typedef void (*wuffs_private_impl__swizzle_ycc__convert_4_func)(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2,
    const uint8_t* up3);

static void  //
wuffs_private_impl__swizzle_cmyk__convert_4_general(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2,
    const uint8_t* up3) {
  for (; x < x_end; x++) {
    // It's called CMYK but, but for Adobe CMYK JPEG images in practice, it's
    // RGBW: 0xFFu means no ink instead of full ink. Note that a double
    // inversion is a no-op, so inversions might be implicit in the code below.
    uint32_t r = ((uint32_t)(*up0++));
    uint32_t g = ((uint32_t)(*up1++));
    uint32_t b = ((uint32_t)(*up2++));
    uint32_t w = ((uint32_t)(*up3++));
    r = ((r * w) + 0x7Fu) / 0xFFu;
    g = ((g * w) + 0x7Fu) / 0xFFu;
    b = ((b * w) + 0x7Fu) / 0xFFu;
    wuffs_base__pixel_buffer__set_color_u32_at(
        dst, x, y, 0xFF000000u | (r << 16u) | (g << 8u) | (b << 0u));
  }
}

static void  //
wuffs_private_impl__swizzle_ycck__convert_4_general(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2,
    const uint8_t* up3) {
  for (; x < x_end; x++) {
    // We invert once again: 0xFFu means no ink instead of full ink.
    uint32_t color =                           //
        wuffs_base__color_ycc__as__color_u32(  //
            *up0++, *up1++, *up2++);
    uint32_t r = 0xFFu - (0xFFu & (color >> 16u));
    uint32_t g = 0xFFu - (0xFFu & (color >> 8u));
    uint32_t b = 0xFFu - (0xFFu & (color >> 0u));
    uint32_t w = ((uint32_t)(*up3++));
    r = ((r * w) + 0x7Fu) / 0xFFu;
    g = ((g * w) + 0x7Fu) / 0xFFu;
    b = ((b * w) + 0x7Fu) / 0xFFu;
    wuffs_base__pixel_buffer__set_color_u32_at(
        dst, x, y, 0xFF000000u | (r << 16u) | (g << 8u) | (b << 0u));
  }
}

// --------

typedef void (*wuffs_private_impl__swizzle_ycc__convert_3_func)(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2);

static void  //
wuffs_private_impl__swizzle_rgb__convert_3_general(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2) {
  for (; x < x_end; x++) {
    uint32_t color = 0xFF000000u |                    //
                     (((uint32_t)(*up0++)) << 16u) |  //
                     (((uint32_t)(*up1++)) << 8u) |   //
                     (((uint32_t)(*up2++)) << 0u);
    wuffs_base__pixel_buffer__set_color_u32_at(dst, x, y, color);
  }
}

static void  //
wuffs_private_impl__swizzle_ycc__convert_3_general(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2) {
  for (; x < x_end; x++) {
    uint32_t color =                           //
        wuffs_base__color_ycc__as__color_u32(  //
            *up0++, *up1++, *up2++);
    wuffs_base__pixel_buffer__set_color_u32_at(dst, x, y, color);
  }
}

static void  //
wuffs_private_impl__swizzle_ycc__convert_3_bgrx(wuffs_base__pixel_buffer* dst,
                                                uint32_t x,
                                                uint32_t x_end,
                                                uint32_t y,
                                                const uint8_t* up0,
                                                const uint8_t* up1,
                                                const uint8_t* up2) {
  size_t dst_stride = dst->private_impl.planes[0].stride;
  uint8_t* dst_iter = dst->private_impl.planes[0].ptr +
                      (dst_stride * ((size_t)y)) + (4u * ((size_t)x));

  for (; x < x_end; x++) {
    uint32_t color =                           //
        wuffs_base__color_ycc__as__color_u32(  //
            *up0++, *up1++, *up2++);
    wuffs_base__poke_u32le__no_bounds_check(dst_iter, color);
    dst_iter += 4u;
  }
}

static void  //
wuffs_private_impl__swizzle_ycc__convert_3_rgbx(wuffs_base__pixel_buffer* dst,
                                                uint32_t x,
                                                uint32_t x_end,
                                                uint32_t y,
                                                const uint8_t* up0,
                                                const uint8_t* up1,
                                                const uint8_t* up2) {
  size_t dst_stride = dst->private_impl.planes[0].stride;
  uint8_t* dst_iter = dst->private_impl.planes[0].ptr +
                      (dst_stride * ((size_t)y)) + (4u * ((size_t)x));

  for (; x < x_end; x++) {
    uint32_t color =                                //
        wuffs_base__color_ycc__as__color_u32_abgr(  //
            *up0++, *up1++, *up2++);
    wuffs_base__poke_u32le__no_bounds_check(dst_iter, color);
    dst_iter += 4u;
  }
}

// --------

// wuffs_private_impl__swizzle_ycc__upsample_func upsamples to a destination
// slice at least 480 (YCCK) or 672 (YCC) bytes long and whose src_len
// (multiplied by 1, 2, 3 or 4) is positive but no more than that. This 480 or
// 672 length is just under 1/4 or 1/3 of the scratch_buffer_2k slice length.
// Both (480 * 4) = 1920 and (672 * 3) = 2016 are less than 2048.
//
// 480 and 672 are nice round numbers because a JPEG MCU is 1, 2, 3 or 4 blocks
// wide and each block is 8 pixels wide. We have:
//   480 = 1 * 8 * 60,   672 = 1 * 8 * 84
//   480 = 2 * 8 * 30,   672 = 2 * 8 * 42
//   480 = 3 * 8 * 20,   672 = 3 * 8 * 28
//   480 = 4 * 8 * 15,   672 = 4 * 8 * 21
//
// Box filters are equivalent to nearest neighbor upsampling. These ignore the
// src_ptr_minor, h1v2_bias, first_column and last_column arguments.
//
// Triangle filters use a 3:1 ratio (in 1 dimension), or 9:3:3:1 (in 2
// dimensions), which is higher quality (less blocky) but also higher
// computational effort.
//
// In theory, we could use triangle filters for any (inv_h, inv_v) combination.
// In practice, matching libjpeg-turbo, we only implement it for the common
// chroma subsampling ratios (YCC420, YCC422 or YCC440), corresponding to an
// (inv_h, inv_v) pair of (2, 2), (2, 1) or (1, 2).
typedef const uint8_t* (*wuffs_private_impl__swizzle_ycc__upsample_func)(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,  // Nearest row.
    const uint8_t* src_ptr_minor,  // Adjacent row, alternating above or below.
    size_t src_len,
    uint32_t h1v2_bias,
    bool first_column,
    bool last_column);

static const uint8_t*  //
wuffs_private_impl__swizzle_ycc__upsample_inv_h1vn_box(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,
    const uint8_t* src_ptr_minor_ignored,
    size_t src_len,
    uint32_t h1v2_bias_ignored,
    bool first_column_ignored,
    bool last_column_ignored) {
  return src_ptr_major;
}

static const uint8_t*  //
wuffs_private_impl__swizzle_ycc__upsample_inv_h2vn_box(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,
    const uint8_t* src_ptr_minor_ignored,
    size_t src_len,
    uint32_t h1v2_bias_ignored,
    bool first_column_ignored,
    bool last_column_ignored) {
  uint8_t* dp = dst_ptr;
  const uint8_t* sp = src_ptr_major;
  while (src_len--) {
    uint8_t sv = *sp++;
    *dp++ = sv;
    *dp++ = sv;
  }
  return dst_ptr;
}

static const uint8_t*  //
wuffs_private_impl__swizzle_ycc__upsample_inv_h3vn_box(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,
    const uint8_t* src_ptr_minor_ignored,
    size_t src_len,
    uint32_t h1v2_bias_ignored,
    bool first_column_ignored,
    bool last_column_ignored) {
  uint8_t* dp = dst_ptr;
  const uint8_t* sp = src_ptr_major;
  while (src_len--) {
    uint8_t sv = *sp++;
    *dp++ = sv;
    *dp++ = sv;
    *dp++ = sv;
  }
  return dst_ptr;
}

static const uint8_t*  //
wuffs_private_impl__swizzle_ycc__upsample_inv_h4vn_box(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,
    const uint8_t* src_ptr_minor_ignored,
    size_t src_len,
    uint32_t h1v2_bias_ignored,
    bool first_column_ignored,
    bool last_column_ignored) {
  uint8_t* dp = dst_ptr;
  const uint8_t* sp = src_ptr_major;
  while (src_len--) {
    uint8_t sv = *sp++;
    *dp++ = sv;
    *dp++ = sv;
    *dp++ = sv;
    *dp++ = sv;
  }
  return dst_ptr;
}

static const uint8_t*  //
wuffs_private_impl__swizzle_ycc__upsample_inv_h1v2_triangle(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,
    const uint8_t* src_ptr_minor,
    size_t src_len,
    uint32_t h1v2_bias,
    bool first_column,
    bool last_column) {
  uint8_t* dp = dst_ptr;
  const uint8_t* sp_major = src_ptr_major;
  const uint8_t* sp_minor = src_ptr_minor;
  while (src_len--) {
    *dp++ = (uint8_t)(((3u * ((uint32_t)(*sp_major++))) +  //
                       (1u * ((uint32_t)(*sp_minor++))) +  //
                       h1v2_bias) >>
                      2u);
  }
  return dst_ptr;
}

static const uint8_t*  //
wuffs_private_impl__swizzle_ycc__upsample_inv_h2v1_triangle(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,
    const uint8_t* src_ptr_minor,
    size_t src_len,
    uint32_t h1v2_bias_ignored,
    bool first_column,
    bool last_column) {
  uint8_t* dp = dst_ptr;
  const uint8_t* sp = src_ptr_major;

  if (first_column) {
    src_len--;
    if ((src_len <= 0u) && last_column) {
      uint8_t sv = *sp++;
      *dp++ = sv;
      *dp++ = sv;
      return dst_ptr;
    }
    uint32_t svp1 = sp[+1];
    uint8_t sv = *sp++;
    *dp++ = sv;
    *dp++ = (uint8_t)(((3u * (uint32_t)sv) + svp1 + 2u) >> 2u);
    if (src_len <= 0u) {
      return dst_ptr;
    }
  }

  if (last_column) {
    src_len--;
  }

  for (; src_len > 0u; src_len--) {
    uint32_t svm1 = sp[-1];
    uint32_t svp1 = sp[+1];
    uint32_t sv3 = 3u * (uint32_t)(*sp++);
    *dp++ = (uint8_t)((sv3 + svm1 + 1u) >> 2u);
    *dp++ = (uint8_t)((sv3 + svp1 + 2u) >> 2u);
  }

  if (last_column) {
    uint32_t svm1 = sp[-1];
    uint8_t sv = *sp++;
    *dp++ = (uint8_t)(((3u * (uint32_t)sv) + svm1 + 1u) >> 2u);
    *dp++ = sv;
  }

  return dst_ptr;
}

static const uint8_t*  //
wuffs_private_impl__swizzle_ycc__upsample_inv_h2v2_triangle(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,
    const uint8_t* src_ptr_minor,
    size_t src_len,
    uint32_t h1v2_bias_ignored,
    bool first_column,
    bool last_column) {
  uint8_t* dp = dst_ptr;
  const uint8_t* sp_major = src_ptr_major;
  const uint8_t* sp_minor = src_ptr_minor;

  if (first_column) {
    src_len--;
    if ((src_len <= 0u) && last_column) {
      uint32_t sv = (12u * ((uint32_t)(*sp_major++))) +  //
                    (4u * ((uint32_t)(*sp_minor++)));
      *dp++ = (uint8_t)((sv + 8u) >> 4u);
      *dp++ = (uint8_t)((sv + 7u) >> 4u);
      return dst_ptr;
    }

    uint32_t sv_major_m1 = sp_major[-0];  // Clamp offset to zero.
    uint32_t sv_minor_m1 = sp_minor[-0];  // Clamp offset to zero.
    uint32_t sv_major_p1 = sp_major[+1];
    uint32_t sv_minor_p1 = sp_minor[+1];

    uint32_t sv = (9u * ((uint32_t)(*sp_major++))) +  //
                  (3u * ((uint32_t)(*sp_minor++)));
    *dp++ = (uint8_t)((sv + (3u * sv_major_m1) + (sv_minor_m1) + 8u) >> 4u);
    *dp++ = (uint8_t)((sv + (3u * sv_major_p1) + (sv_minor_p1) + 7u) >> 4u);
    if (src_len <= 0u) {
      return dst_ptr;
    }
  }

  if (last_column) {
    src_len--;
  }

  for (; src_len > 0u; src_len--) {
    uint32_t sv_major_m1 = sp_major[-1];
    uint32_t sv_minor_m1 = sp_minor[-1];
    uint32_t sv_major_p1 = sp_major[+1];
    uint32_t sv_minor_p1 = sp_minor[+1];

    uint32_t sv = (9u * ((uint32_t)(*sp_major++))) +  //
                  (3u * ((uint32_t)(*sp_minor++)));
    *dp++ = (uint8_t)((sv + (3u * sv_major_m1) + (sv_minor_m1) + 8u) >> 4u);
    *dp++ = (uint8_t)((sv + (3u * sv_major_p1) + (sv_minor_p1) + 7u) >> 4u);
  }

  if (last_column) {
    uint32_t sv_major_m1 = sp_major[-1];
    uint32_t sv_minor_m1 = sp_minor[-1];
    uint32_t sv_major_p1 = sp_major[+0];  // Clamp offset to zero.
    uint32_t sv_minor_p1 = sp_minor[+0];  // Clamp offset to zero.

    uint32_t sv = (9u * ((uint32_t)(*sp_major++))) +  //
                  (3u * ((uint32_t)(*sp_minor++)));
    *dp++ = (uint8_t)((sv + (3u * sv_major_m1) + (sv_minor_m1) + 8u) >> 4u);
    *dp++ = (uint8_t)((sv + (3u * sv_major_p1) + (sv_minor_p1) + 7u) >> 4u);
  }

  return dst_ptr;
}

// wuffs_private_impl__swizzle_ycc__upsample_funcs is indexed by inv_h and then
// inv_v.
static const wuffs_private_impl__swizzle_ycc__upsample_func
    wuffs_private_impl__swizzle_ycc__upsample_funcs[4][4] = {
        {
            wuffs_private_impl__swizzle_ycc__upsample_inv_h1vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h1vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h1vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h1vn_box,
        },
        {
            wuffs_private_impl__swizzle_ycc__upsample_inv_h2vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h2vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h2vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h2vn_box,
        },
        {
            wuffs_private_impl__swizzle_ycc__upsample_inv_h3vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h3vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h3vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h3vn_box,
        },
        {
            wuffs_private_impl__swizzle_ycc__upsample_inv_h4vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h4vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h4vn_box,
            wuffs_private_impl__swizzle_ycc__upsample_inv_h4vn_box,
        },
};

static inline uint32_t  //
wuffs_private_impl__swizzle_has_triangle_upsampler(uint32_t inv_h,
                                                   uint32_t inv_v) {
  if (inv_h == 1u) {
    return inv_v == 2u;
  } else if (inv_h == 2u) {
    return (inv_v == 1u) || (inv_v == 2u);
  }
  return false;
}

// --------

// All of the wuffs_private_impl__swizzle_ycc__etc functions have
// preconditions. See all of the checks made in
// wuffs_base__pixel_swizzler__swizzle_ycck before calling these functions. For
// example, (width > 0) is a precondition, but there are many more.

static void  //
wuffs_private_impl__swizzle_ycck__general__triangle_filter_edge_row(
    wuffs_base__pixel_buffer* dst,
    uint32_t width,
    uint32_t y,
    const uint8_t* src_ptr0,
    const uint8_t* src_ptr1,
    const uint8_t* src_ptr2,
    const uint8_t* src_ptr3,
    uint32_t stride0,
    uint32_t stride1,
    uint32_t stride2,
    uint32_t stride3,
    uint32_t inv_h0,
    uint32_t inv_h1,
    uint32_t inv_h2,
    uint32_t inv_h3,
    uint32_t inv_v0,
    uint32_t inv_v1,
    uint32_t inv_v2,
    uint32_t inv_v3,
    uint32_t half_width_for_2to1,
    uint32_t h1v2_bias,
    uint8_t* scratch_buffer_2k_ptr,
    wuffs_private_impl__swizzle_ycc__upsample_func upfunc0,
    wuffs_private_impl__swizzle_ycc__upsample_func upfunc1,
    wuffs_private_impl__swizzle_ycc__upsample_func upfunc2,
    wuffs_private_impl__swizzle_ycc__upsample_func upfunc3,
    wuffs_private_impl__swizzle_ycc__convert_4_func conv4func) {
  const uint8_t* src0 = src_ptr0 + ((y / inv_v0) * (size_t)stride0);
  const uint8_t* src1 = src_ptr1 + ((y / inv_v1) * (size_t)stride1);
  const uint8_t* src2 = src_ptr2 + ((y / inv_v2) * (size_t)stride2);
  const uint8_t* src3 = src_ptr3 + ((y / inv_v3) * (size_t)stride3);
  uint32_t total_src_len0 = 0u;
  uint32_t total_src_len1 = 0u;
  uint32_t total_src_len2 = 0u;
  uint32_t total_src_len3 = 0u;

  uint32_t x = 0u;
  while (x < width) {
    bool first_column = x == 0u;
    uint32_t end = x + 480u;
    if (end > width) {
      end = width;
    }

    uint32_t src_len0 = ((end - x) + inv_h0 - 1u) / inv_h0;
    uint32_t src_len1 = ((end - x) + inv_h1 - 1u) / inv_h1;
    uint32_t src_len2 = ((end - x) + inv_h2 - 1u) / inv_h2;
    uint32_t src_len3 = ((end - x) + inv_h3 - 1u) / inv_h3;
    total_src_len0 += src_len0;
    total_src_len1 += src_len1;
    total_src_len2 += src_len2;
    total_src_len3 += src_len3;

    const uint8_t* src_ptr_x0 = src0 + (x / inv_h0);
    const uint8_t* up0 = (*upfunc0)(          //
        scratch_buffer_2k_ptr + (0u * 480u),  //
        src_ptr_x0,                           //
        src_ptr_x0,                           //
        src_len0,                             //
        h1v2_bias,                            //
        first_column,                         //
        (total_src_len0 >= half_width_for_2to1));

    const uint8_t* src_ptr_x1 = src1 + (x / inv_h1);
    const uint8_t* up1 = (*upfunc1)(          //
        scratch_buffer_2k_ptr + (1u * 480u),  //
        src_ptr_x1,                           //
        src_ptr_x1,                           //
        src_len1,                             //
        h1v2_bias,                            //
        first_column,                         //
        (total_src_len1 >= half_width_for_2to1));

    const uint8_t* src_ptr_x2 = src2 + (x / inv_h2);
    const uint8_t* up2 = (*upfunc2)(          //
        scratch_buffer_2k_ptr + (2u * 480u),  //
        src_ptr_x2,                           //
        src_ptr_x2,                           //
        src_len2,                             //
        h1v2_bias,                            //
        first_column,                         //
        (total_src_len2 >= half_width_for_2to1));

    const uint8_t* src_ptr_x3 = src3 + (x / inv_h3);
    const uint8_t* up3 = (*upfunc3)(          //
        scratch_buffer_2k_ptr + (3u * 480u),  //
        src_ptr_x3,                           //
        src_ptr_x3,                           //
        src_len3,                             //
        h1v2_bias,                            //
        first_column,                         //
        (total_src_len3 >= half_width_for_2to1));

    (*conv4func)(dst, x, end, y, up0, up1, up2, up3);
    x = end;
  }
}

static void  //
wuffs_private_impl__swizzle_ycck__general__triangle_filter(
    wuffs_base__pixel_buffer* dst,
    uint32_t x_min_incl,
    uint32_t x_max_excl,
    uint32_t y_min_incl,
    uint32_t y_max_excl,
    const uint8_t* src_ptr0,
    const uint8_t* src_ptr1,
    const uint8_t* src_ptr2,
    const uint8_t* src_ptr3,
    uint32_t stride0,
    uint32_t stride1,
    uint32_t stride2,
    uint32_t stride3,
    uint32_t inv_h0,
    uint32_t inv_h1,
    uint32_t inv_h2,
    uint32_t inv_h3,
    uint32_t inv_v0,
    uint32_t inv_v1,
    uint32_t inv_v2,
    uint32_t inv_v3,
    uint32_t half_width_for_2to1,
    uint32_t half_height_for_2to1,
    uint8_t* scratch_buffer_2k_ptr,
    wuffs_private_impl__swizzle_ycc__upsample_func (*upfuncs)[4][4],
    wuffs_private_impl__swizzle_ycc__convert_4_func conv4func) {
  if ((x_min_incl != 0) || (y_min_incl != 0)) {
    return;
  }

  wuffs_private_impl__swizzle_ycc__upsample_func upfunc0 =
      (*upfuncs)[(inv_h0 - 1u) & 3u][(inv_v0 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc1 =
      (*upfuncs)[(inv_h1 - 1u) & 3u][(inv_v1 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc2 =
      (*upfuncs)[(inv_h2 - 1u) & 3u][(inv_v2 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc3 =
      (*upfuncs)[(inv_h3 - 1u) & 3u][(inv_v3 - 1u) & 3u];

  // First row.
  uint32_t h1v2_bias = 1u;
  wuffs_private_impl__swizzle_ycck__general__triangle_filter_edge_row(
      dst, x_max_excl, 0u,                     //
      src_ptr0, src_ptr1, src_ptr2, src_ptr3,  //
      stride0, stride1, stride2, stride3,      //
      inv_h0, inv_h1, inv_h2, inv_h3,          //
      inv_v0, inv_v1, inv_v2, inv_v3,          //
      half_width_for_2to1,                     //
      h1v2_bias,                               //
      scratch_buffer_2k_ptr,                   //
      upfunc0, upfunc1, upfunc2, upfunc3, conv4func);
  h1v2_bias = 2u;

  // Middle rows.
  bool last_row = y_max_excl == 2u * half_height_for_2to1;
  uint32_t middle_y_max_excl = last_row ? (y_max_excl - 1u) : y_max_excl;
  uint32_t y;
  for (y = 1u; y < middle_y_max_excl; y++) {
    const uint8_t* src0_major = src_ptr0 + ((y / inv_v0) * (size_t)stride0);
    const uint8_t* src0_minor =
        (inv_v0 != 2u)
            ? src0_major
            : ((y & 1u) ? (src0_major + stride0) : (src0_major - stride0));
    const uint8_t* src1_major = src_ptr1 + ((y / inv_v1) * (size_t)stride1);
    const uint8_t* src1_minor =
        (inv_v1 != 2u)
            ? src1_major
            : ((y & 1u) ? (src1_major + stride1) : (src1_major - stride1));
    const uint8_t* src2_major = src_ptr2 + ((y / inv_v2) * (size_t)stride2);
    const uint8_t* src2_minor =
        (inv_v2 != 2u)
            ? src2_major
            : ((y & 1u) ? (src2_major + stride2) : (src2_major - stride2));
    const uint8_t* src3_major = src_ptr3 + ((y / inv_v3) * (size_t)stride3);
    const uint8_t* src3_minor =
        (inv_v3 != 2u)
            ? src3_major
            : ((y & 1u) ? (src3_major + stride3) : (src3_major - stride3));
    uint32_t total_src_len0 = 0u;
    uint32_t total_src_len1 = 0u;
    uint32_t total_src_len2 = 0u;
    uint32_t total_src_len3 = 0u;

    uint32_t x = 0u;
    while (x < x_max_excl) {
      bool first_column = x == 0u;
      uint32_t end = x + 480u;
      if (end > x_max_excl) {
        end = x_max_excl;
      }

      uint32_t src_len0 = ((end - x) + inv_h0 - 1u) / inv_h0;
      uint32_t src_len1 = ((end - x) + inv_h1 - 1u) / inv_h1;
      uint32_t src_len2 = ((end - x) + inv_h2 - 1u) / inv_h2;
      uint32_t src_len3 = ((end - x) + inv_h3 - 1u) / inv_h3;
      total_src_len0 += src_len0;
      total_src_len1 += src_len1;
      total_src_len2 += src_len2;
      total_src_len3 += src_len3;

      const uint8_t* up0 = (*upfunc0)(          //
          scratch_buffer_2k_ptr + (0u * 480u),  //
          src0_major + (x / inv_h0),            //
          src0_minor + (x / inv_h0),            //
          src_len0,                             //
          h1v2_bias,                            //
          first_column,                         //
          (total_src_len0 >= half_width_for_2to1));

      const uint8_t* up1 = (*upfunc1)(          //
          scratch_buffer_2k_ptr + (1u * 480u),  //
          src1_major + (x / inv_h1),            //
          src1_minor + (x / inv_h1),            //
          src_len1,                             //
          h1v2_bias,                            //
          first_column,                         //
          (total_src_len1 >= half_width_for_2to1));

      const uint8_t* up2 = (*upfunc2)(          //
          scratch_buffer_2k_ptr + (2u * 480u),  //
          src2_major + (x / inv_h2),            //
          src2_minor + (x / inv_h2),            //
          src_len2,                             //
          h1v2_bias,                            //
          first_column,                         //
          (total_src_len2 >= half_width_for_2to1));

      const uint8_t* up3 = (*upfunc3)(          //
          scratch_buffer_2k_ptr + (3u * 480u),  //
          src3_major + (x / inv_h3),            //
          src3_minor + (x / inv_h3),            //
          src_len3,                             //
          h1v2_bias,                            //
          first_column,                         //
          (total_src_len3 >= half_width_for_2to1));

      (*conv4func)(dst, x, end, y, up0, up1, up2, up3);
      x = end;
    }

    h1v2_bias ^= 3u;
  }

  // Last row.
  if (middle_y_max_excl != y_max_excl) {
    wuffs_private_impl__swizzle_ycck__general__triangle_filter_edge_row(
        dst, x_max_excl, middle_y_max_excl,      //
        src_ptr0, src_ptr1, src_ptr2, src_ptr3,  //
        stride0, stride1, stride2, stride3,      //
        inv_h0, inv_h1, inv_h2, inv_h3,          //
        inv_v0, inv_v1, inv_v2, inv_v3,          //
        half_width_for_2to1,                     //
        h1v2_bias,                               //
        scratch_buffer_2k_ptr,                   //
        upfunc0, upfunc1, upfunc2, upfunc3, conv4func);
  }
}

static void  //
wuffs_private_impl__swizzle_ycc__general__triangle_filter_edge_row(
    wuffs_base__pixel_buffer* dst,
    uint32_t width,
    uint32_t y,
    const uint8_t* src_ptr0,
    const uint8_t* src_ptr1,
    const uint8_t* src_ptr2,
    uint32_t stride0,
    uint32_t stride1,
    uint32_t stride2,
    uint32_t inv_h0,
    uint32_t inv_h1,
    uint32_t inv_h2,
    uint32_t inv_v0,
    uint32_t inv_v1,
    uint32_t inv_v2,
    uint32_t half_width_for_2to1,
    uint32_t h1v2_bias,
    uint8_t* scratch_buffer_2k_ptr,
    wuffs_private_impl__swizzle_ycc__upsample_func upfunc0,
    wuffs_private_impl__swizzle_ycc__upsample_func upfunc1,
    wuffs_private_impl__swizzle_ycc__upsample_func upfunc2,
    wuffs_private_impl__swizzle_ycc__convert_3_func conv3func) {
  const uint8_t* src0 = src_ptr0 + ((y / inv_v0) * (size_t)stride0);
  const uint8_t* src1 = src_ptr1 + ((y / inv_v1) * (size_t)stride1);
  const uint8_t* src2 = src_ptr2 + ((y / inv_v2) * (size_t)stride2);
  uint32_t total_src_len0 = 0u;
  uint32_t total_src_len1 = 0u;
  uint32_t total_src_len2 = 0u;

  uint32_t x = 0u;
  while (x < width) {
    bool first_column = x == 0u;
    uint32_t end = x + 672u;
    if (end > width) {
      end = width;
    }

    uint32_t src_len0 = ((end - x) + inv_h0 - 1u) / inv_h0;
    uint32_t src_len1 = ((end - x) + inv_h1 - 1u) / inv_h1;
    uint32_t src_len2 = ((end - x) + inv_h2 - 1u) / inv_h2;
    total_src_len0 += src_len0;
    total_src_len1 += src_len1;
    total_src_len2 += src_len2;

    const uint8_t* src_ptr_x0 = src0 + (x / inv_h0);
    const uint8_t* up0 = (*upfunc0)(          //
        scratch_buffer_2k_ptr + (0u * 672u),  //
        src_ptr_x0,                           //
        src_ptr_x0,                           //
        src_len0,                             //
        h1v2_bias,                            //
        first_column,                         //
        (total_src_len0 >= half_width_for_2to1));

    const uint8_t* src_ptr_x1 = src1 + (x / inv_h1);
    const uint8_t* up1 = (*upfunc1)(          //
        scratch_buffer_2k_ptr + (1u * 672u),  //
        src_ptr_x1,                           //
        src_ptr_x1,                           //
        src_len1,                             //
        h1v2_bias,                            //
        first_column,                         //
        (total_src_len1 >= half_width_for_2to1));

    const uint8_t* src_ptr_x2 = src2 + (x / inv_h2);
    const uint8_t* up2 = (*upfunc2)(          //
        scratch_buffer_2k_ptr + (2u * 672u),  //
        src_ptr_x2,                           //
        src_ptr_x2,                           //
        src_len2,                             //
        h1v2_bias,                            //
        first_column,                         //
        (total_src_len2 >= half_width_for_2to1));

    (*conv3func)(dst, x, end, y, up0, up1, up2);
    x = end;
  }
}

static void  //
wuffs_private_impl__swizzle_ycc__general__triangle_filter(
    wuffs_base__pixel_buffer* dst,
    uint32_t x_min_incl,
    uint32_t x_max_excl,
    uint32_t y_min_incl,
    uint32_t y_max_excl,
    const uint8_t* src_ptr0,
    const uint8_t* src_ptr1,
    const uint8_t* src_ptr2,
    uint32_t stride0,
    uint32_t stride1,
    uint32_t stride2,
    uint32_t inv_h0,
    uint32_t inv_h1,
    uint32_t inv_h2,
    uint32_t inv_v0,
    uint32_t inv_v1,
    uint32_t inv_v2,
    uint32_t half_width_for_2to1,
    uint32_t half_height_for_2to1,
    uint8_t* scratch_buffer_2k_ptr,
    wuffs_private_impl__swizzle_ycc__upsample_func (*upfuncs)[4][4],
    wuffs_private_impl__swizzle_ycc__convert_3_func conv3func) {
  if ((x_min_incl != 0) || (y_min_incl != 0)) {
    return;
  }

  wuffs_private_impl__swizzle_ycc__upsample_func upfunc0 =
      (*upfuncs)[(inv_h0 - 1u) & 3u][(inv_v0 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc1 =
      (*upfuncs)[(inv_h1 - 1u) & 3u][(inv_v1 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc2 =
      (*upfuncs)[(inv_h2 - 1u) & 3u][(inv_v2 - 1u) & 3u];

  // First row.
  uint32_t h1v2_bias = 1u;
  wuffs_private_impl__swizzle_ycc__general__triangle_filter_edge_row(
      dst, x_max_excl, 0u,           //
      src_ptr0, src_ptr1, src_ptr2,  //
      stride0, stride1, stride2,     //
      inv_h0, inv_h1, inv_h2,        //
      inv_v0, inv_v1, inv_v2,        //
      half_width_for_2to1,           //
      h1v2_bias,                     //
      scratch_buffer_2k_ptr,         //
      upfunc0, upfunc1, upfunc2, conv3func);
  h1v2_bias = 2u;

  // Middle rows.
  bool last_row = y_max_excl == 2u * half_height_for_2to1;
  uint32_t middle_y_max_excl = last_row ? (y_max_excl - 1u) : y_max_excl;
  uint32_t y;
  for (y = 1u; y < middle_y_max_excl; y++) {
    const uint8_t* src0_major = src_ptr0 + ((y / inv_v0) * (size_t)stride0);
    const uint8_t* src0_minor =
        (inv_v0 != 2u)
            ? src0_major
            : ((y & 1u) ? (src0_major + stride0) : (src0_major - stride0));
    const uint8_t* src1_major = src_ptr1 + ((y / inv_v1) * (size_t)stride1);
    const uint8_t* src1_minor =
        (inv_v1 != 2u)
            ? src1_major
            : ((y & 1u) ? (src1_major + stride1) : (src1_major - stride1));
    const uint8_t* src2_major = src_ptr2 + ((y / inv_v2) * (size_t)stride2);
    const uint8_t* src2_minor =
        (inv_v2 != 2u)
            ? src2_major
            : ((y & 1u) ? (src2_major + stride2) : (src2_major - stride2));
    uint32_t total_src_len0 = 0u;
    uint32_t total_src_len1 = 0u;
    uint32_t total_src_len2 = 0u;

    uint32_t x = 0u;
    while (x < x_max_excl) {
      bool first_column = x == 0u;
      uint32_t end = x + 672u;
      if (end > x_max_excl) {
        end = x_max_excl;
      }

      uint32_t src_len0 = ((end - x) + inv_h0 - 1u) / inv_h0;
      uint32_t src_len1 = ((end - x) + inv_h1 - 1u) / inv_h1;
      uint32_t src_len2 = ((end - x) + inv_h2 - 1u) / inv_h2;
      total_src_len0 += src_len0;
      total_src_len1 += src_len1;
      total_src_len2 += src_len2;

      const uint8_t* up0 = (*upfunc0)(          //
          scratch_buffer_2k_ptr + (0u * 672u),  //
          src0_major + (x / inv_h0),            //
          src0_minor + (x / inv_h0),            //
          src_len0,                             //
          h1v2_bias,                            //
          first_column,                         //
          (total_src_len0 >= half_width_for_2to1));

      const uint8_t* up1 = (*upfunc1)(          //
          scratch_buffer_2k_ptr + (1u * 672u),  //
          src1_major + (x / inv_h1),            //
          src1_minor + (x / inv_h1),            //
          src_len1,                             //
          h1v2_bias,                            //
          first_column,                         //
          (total_src_len1 >= half_width_for_2to1));

      const uint8_t* up2 = (*upfunc2)(          //
          scratch_buffer_2k_ptr + (2u * 672u),  //
          src2_major + (x / inv_h2),            //
          src2_minor + (x / inv_h2),            //
          src_len2,                             //
          h1v2_bias,                            //
          first_column,                         //
          (total_src_len2 >= half_width_for_2to1));

      (*conv3func)(dst, x, end, y, up0, up1, up2);
      x = end;
    }

    h1v2_bias ^= 3u;
  }

  // Last row.
  if (middle_y_max_excl != y_max_excl) {
    wuffs_private_impl__swizzle_ycc__general__triangle_filter_edge_row(
        dst, x_max_excl, middle_y_max_excl,  //
        src_ptr0, src_ptr1, src_ptr2,        //
        stride0, stride1, stride2,           //
        inv_h0, inv_h1, inv_h2,              //
        inv_v0, inv_v1, inv_v2,              //
        half_width_for_2to1,                 //
        h1v2_bias,                           //
        scratch_buffer_2k_ptr,               //
        upfunc0, upfunc1, upfunc2, conv3func);
  }
}

static void  //
wuffs_private_impl__swizzle_ycc__general__box_filter(
    wuffs_base__pixel_buffer* dst,
    uint32_t x_min_incl,
    uint32_t x_max_excl,
    uint32_t y_min_incl,
    uint32_t y_max_excl,
    const uint8_t* src_ptr0,
    const uint8_t* src_ptr1,
    const uint8_t* src_ptr2,
    uint32_t stride0,
    uint32_t stride1,
    uint32_t stride2,
    uint32_t inv_h0,
    uint32_t inv_h1,
    uint32_t inv_h2,
    uint32_t inv_v0,
    uint32_t inv_v1,
    uint32_t inv_v2,
    uint32_t half_width_for_2to1,
    uint32_t half_height_for_2to1,
    uint8_t* scratch_buffer_2k_ptr,
    wuffs_private_impl__swizzle_ycc__upsample_func (*upfuncs)[4][4],
    wuffs_private_impl__swizzle_ycc__convert_3_func conv3func) {
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc0 =
      (*upfuncs)[(inv_h0 - 1u) & 3u][(inv_v0 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc1 =
      (*upfuncs)[(inv_h1 - 1u) & 3u][(inv_v1 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc2 =
      (*upfuncs)[(inv_h2 - 1u) & 3u][(inv_v2 - 1u) & 3u];

  uint32_t y;
  for (y = y_min_incl; y < y_max_excl; y++) {
    const uint8_t* src0_major =
        src_ptr0 + (((y - y_min_incl) / inv_v0) * (size_t)stride0);
    const uint8_t* src1_major =
        src_ptr1 + (((y - y_min_incl) / inv_v1) * (size_t)stride1);
    const uint8_t* src2_major =
        src_ptr2 + (((y - y_min_incl) / inv_v2) * (size_t)stride2);

    uint32_t x = x_min_incl;
    while (x < x_max_excl) {
      uint32_t end = x + 672u;
      if (end > x_max_excl) {
        end = x_max_excl;
      }

      uint32_t src_len0 = ((end - x) + inv_h0 - 1u) / inv_h0;
      uint32_t src_len1 = ((end - x) + inv_h1 - 1u) / inv_h1;
      uint32_t src_len2 = ((end - x) + inv_h2 - 1u) / inv_h2;

      const uint8_t* up0 = (*upfunc0)(               //
          scratch_buffer_2k_ptr + (0u * 672u),       //
          src0_major + ((x - x_min_incl) / inv_h0),  //
          src0_major + ((x - x_min_incl) / inv_h0),  //
          src_len0,                                  //
          0u, false, false);

      const uint8_t* up1 = (*upfunc1)(               //
          scratch_buffer_2k_ptr + (1u * 672u),       //
          src1_major + ((x - x_min_incl) / inv_h1),  //
          src1_major + ((x - x_min_incl) / inv_h1),  //
          src_len1,                                  //
          0u, false, false);

      const uint8_t* up2 = (*upfunc2)(               //
          scratch_buffer_2k_ptr + (2u * 672u),       //
          src2_major + ((x - x_min_incl) / inv_h2),  //
          src2_major + ((x - x_min_incl) / inv_h2),  //
          src_len2,                                  //
          0u, false, false);

      (*conv3func)(dst, x, end, y, up0, up1, up2);
      x = end;
    }
  }
}

static void  //
wuffs_private_impl__swizzle_ycck__general__box_filter(
    wuffs_base__pixel_buffer* dst,
    uint32_t x_min_incl,
    uint32_t x_max_excl,
    uint32_t y_min_incl,
    uint32_t y_max_excl,
    const uint8_t* src_ptr0,
    const uint8_t* src_ptr1,
    const uint8_t* src_ptr2,
    const uint8_t* src_ptr3,
    uint32_t stride0,
    uint32_t stride1,
    uint32_t stride2,
    uint32_t stride3,
    uint32_t inv_h0,
    uint32_t inv_h1,
    uint32_t inv_h2,
    uint32_t inv_h3,
    uint32_t inv_v0,
    uint32_t inv_v1,
    uint32_t inv_v2,
    uint32_t inv_v3,
    uint32_t half_width_for_2to1,
    uint32_t half_height_for_2to1,
    uint8_t* scratch_buffer_2k_ptr,
    wuffs_private_impl__swizzle_ycc__upsample_func (*upfuncs)[4][4],
    wuffs_private_impl__swizzle_ycc__convert_4_func conv4func) {
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc0 =
      (*upfuncs)[(inv_h0 - 1u) & 3u][(inv_v0 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc1 =
      (*upfuncs)[(inv_h1 - 1u) & 3u][(inv_v1 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc2 =
      (*upfuncs)[(inv_h2 - 1u) & 3u][(inv_v2 - 1u) & 3u];
  wuffs_private_impl__swizzle_ycc__upsample_func upfunc3 =
      (*upfuncs)[(inv_h3 - 1u) & 3u][(inv_v3 - 1u) & 3u];

  uint32_t y;
  for (y = y_min_incl; y < y_max_excl; y++) {
    const uint8_t* src0_major =
        src_ptr0 + (((y - y_min_incl) / inv_v0) * (size_t)stride0);
    const uint8_t* src1_major =
        src_ptr1 + (((y - y_min_incl) / inv_v1) * (size_t)stride1);
    const uint8_t* src2_major =
        src_ptr2 + (((y - y_min_incl) / inv_v2) * (size_t)stride2);
    const uint8_t* src3_major =
        src_ptr3 + (((y - y_min_incl) / inv_v3) * (size_t)stride3);

    uint32_t x = x_min_incl;
    while (x < x_max_excl) {
      uint32_t end = x + 480u;
      if (end > x_max_excl) {
        end = x_max_excl;
      }

      uint32_t src_len0 = ((end - x) + inv_h0 - 1u) / inv_h0;
      uint32_t src_len1 = ((end - x) + inv_h1 - 1u) / inv_h1;
      uint32_t src_len2 = ((end - x) + inv_h2 - 1u) / inv_h2;
      uint32_t src_len3 = ((end - x) + inv_h3 - 1u) / inv_h3;

      const uint8_t* up0 = (*upfunc0)(               //
          scratch_buffer_2k_ptr + (0u * 480u),       //
          src0_major + ((x - x_min_incl) / inv_h0),  //
          src0_major + ((x - x_min_incl) / inv_h0),  //
          src_len0,                                  //
          0u, false, false);

      const uint8_t* up1 = (*upfunc1)(               //
          scratch_buffer_2k_ptr + (1u * 480u),       //
          src1_major + ((x - x_min_incl) / inv_h1),  //
          src1_major + ((x - x_min_incl) / inv_h1),  //
          src_len1,                                  //
          0u, false, false);

      const uint8_t* up2 = (*upfunc2)(               //
          scratch_buffer_2k_ptr + (2u * 480u),       //
          src2_major + ((x - x_min_incl) / inv_h2),  //
          src2_major + ((x - x_min_incl) / inv_h2),  //
          src_len2,                                  //
          0u, false, false);

      const uint8_t* up3 = (*upfunc3)(               //
          scratch_buffer_2k_ptr + (3u * 480u),       //
          src3_major + ((x - x_min_incl) / inv_h3),  //
          src3_major + ((x - x_min_incl) / inv_h3),  //
          src_len3,                                  //
          0u, false, false);

      (*conv4func)(dst, x, end, y, up0, up1, up2, up3);
      x = end;
    }
  }
}

// --------

// wuffs_private_impl__swizzle_flattened_length is like
// wuffs_base__table__flattened_length but returns uint64_t (not size_t) and
// also accounts for subsampling.
static uint64_t  //
wuffs_private_impl__swizzle_flattened_length(uint32_t width,
                                             uint32_t height,
                                             uint32_t stride,
                                             uint32_t inv_h,
                                             uint32_t inv_v) {
  uint64_t scaled_width = (((uint64_t)width) + (inv_h - 1u)) / inv_h;
  uint64_t scaled_height = (((uint64_t)height) + (inv_v - 1u)) / inv_v;
  if (scaled_height <= 0u) {
    return 0u;
  }
  return ((scaled_height - 1u) * stride) + scaled_width;
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__status  //
wuffs_base__pixel_swizzler__swizzle_ycck(
    const wuffs_base__pixel_swizzler* p,
    wuffs_base__pixel_buffer* dst,
    wuffs_base__slice_u8 dst_palette,
    uint32_t x_min_incl,
    uint32_t x_max_excl,
    uint32_t y_min_incl,
    uint32_t y_max_excl,
    wuffs_base__slice_u8 src0,
    wuffs_base__slice_u8 src1,
    wuffs_base__slice_u8 src2,
    wuffs_base__slice_u8 src3,
    uint32_t width0,
    uint32_t width1,
    uint32_t width2,
    uint32_t width3,
    uint32_t height0,
    uint32_t height1,
    uint32_t height2,
    uint32_t height3,
    uint32_t stride0,
    uint32_t stride1,
    uint32_t stride2,
    uint32_t stride3,
    uint8_t h0,
    uint8_t h1,
    uint8_t h2,
    uint8_t h3,
    uint8_t v0,
    uint8_t v1,
    uint8_t v2,
    uint8_t v3,
    bool is_rgb_or_cmyk,
    bool triangle_filter_for_2to1,
    wuffs_base__slice_u8 scratch_buffer_2k) {
  if (!p) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  } else if (!dst ||                             //
             (x_min_incl > x_max_excl) ||        //
             (x_max_excl > 0xFFFFu) ||           //
             (y_min_incl > y_max_excl) ||        //
             (y_max_excl > 0xFFFFu) ||           //
             (4u <= ((unsigned int)h0 - 1u)) ||  //
             (4u <= ((unsigned int)h1 - 1u)) ||  //
             (4u <= ((unsigned int)h2 - 1u)) ||  //
             (4u <= ((unsigned int)v0 - 1u)) ||  //
             (4u <= ((unsigned int)v1 - 1u)) ||  //
             (4u <= ((unsigned int)v2 - 1u)) ||  //
             (triangle_filter_for_2to1 && ((x_min_incl | y_min_incl) > 0u)) ||
             (scratch_buffer_2k.len < 2048u)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((h3 != 0u) || (v3 != 0u)) {
    if ((4u <= ((unsigned int)h3 - 1u)) ||  //
        (4u <= ((unsigned int)v3 - 1u))) {
      return wuffs_base__make_status(wuffs_base__error__bad_argument);
    }
  }

  uint32_t max_incl_h = wuffs_private_impl__u32__max_of_4(h0, h1, h2, h3);
  uint32_t max_incl_v = wuffs_private_impl__u32__max_of_4(v0, v1, v2, v3);

  // Calculate the inverse h and v ratios.
  //
  // It also canonicalizes (h=2 and max_incl_h=4) as equivalent to (h=1 and
  // max_incl_h=2). In both cases, the inv_h value is 2.
  uint32_t inv_h0 = max_incl_h / h0;
  uint32_t inv_h1 = max_incl_h / h1;
  uint32_t inv_h2 = max_incl_h / h2;
  uint32_t inv_h3 = h3 ? (max_incl_h / h3) : 0u;
  uint32_t inv_v0 = max_incl_v / v0;
  uint32_t inv_v1 = max_incl_v / v1;
  uint32_t inv_v2 = max_incl_v / v2;
  uint32_t inv_v3 = v3 ? (max_incl_v / v3) : 0u;

  if (x_min_incl != 0) {
    if ((x_min_incl % inv_h0) || (x_min_incl % inv_h1) ||
        (x_min_incl % inv_h2) || (inv_h3 && (x_min_incl % inv_h3))) {
      return wuffs_base__make_status(wuffs_base__error__bad_argument);
    }
  }
  if (y_min_incl != 0) {
    if ((y_min_incl % inv_v0) || (y_min_incl % inv_v1) ||
        (y_min_incl % inv_v2) || (inv_v3 && (y_min_incl % inv_v3))) {
      return wuffs_base__make_status(wuffs_base__error__bad_argument);
    }
  }

  uint32_t half_width_for_2to1 = ((x_max_excl - x_min_incl) + 1u) / 2u;
  if (inv_h0 == 2) {
    half_width_for_2to1 = wuffs_base__u32__min(half_width_for_2to1, width0);
  }
  if (inv_h1 == 2) {
    half_width_for_2to1 = wuffs_base__u32__min(half_width_for_2to1, width1);
  }
  if (inv_h2 == 2) {
    half_width_for_2to1 = wuffs_base__u32__min(half_width_for_2to1, width2);
  }
  if (inv_h3 == 2) {
    half_width_for_2to1 = wuffs_base__u32__min(half_width_for_2to1, width3);
  }

  uint32_t half_height_for_2to1 = ((y_max_excl - y_min_incl) + 1u) / 2u;
  if (inv_v0 == 2) {
    half_height_for_2to1 = wuffs_base__u32__min(half_height_for_2to1, height0);
  }
  if (inv_v1 == 2) {
    half_height_for_2to1 = wuffs_base__u32__min(half_height_for_2to1, height1);
  }
  if (inv_v2 == 2) {
    half_height_for_2to1 = wuffs_base__u32__min(half_height_for_2to1, height2);
  }
  if (inv_v3 == 2) {
    half_height_for_2to1 = wuffs_base__u32__min(half_height_for_2to1, height3);
  }

  x_max_excl = wuffs_base__u32__min(                   //
      wuffs_base__pixel_config__width(&dst->pixcfg),   //
      x_min_incl + wuffs_private_impl__u32__min_of_5(  //
                       x_max_excl - x_min_incl,        //
                       width0 * inv_h0,                //
                       width1 * inv_h1,                //
                       width2 * inv_h2,                //
                       inv_h3 ? (width3 * inv_h3) : 0xFFFFFFFF));
  y_max_excl = wuffs_base__u32__min(                   //
      wuffs_base__pixel_config__height(&dst->pixcfg),  //
      y_min_incl + wuffs_private_impl__u32__min_of_5(  //
                       y_max_excl - y_min_incl,        //
                       height0 * inv_v0,               //
                       height1 * inv_v1,               //
                       height2 * inv_v2,               //
                       inv_v3 ? (height3 * inv_v3) : 0xFFFFFFFF));

  if ((x_min_incl >= x_max_excl) || (y_min_incl >= y_max_excl)) {
    return wuffs_base__make_status(NULL);
  }
  uint32_t width = x_max_excl - x_min_incl;
  uint32_t height = y_max_excl - y_min_incl;

  if (((h0 * inv_h0) != max_incl_h) ||  //
      ((h1 * inv_h1) != max_incl_h) ||  //
      ((h2 * inv_h2) != max_incl_h) ||  //
      ((v0 * inv_v0) != max_incl_v) ||  //
      ((v1 * inv_v1) != max_incl_v) ||  //
      ((v2 * inv_v2) != max_incl_v) ||  //
      (src0.len < wuffs_private_impl__swizzle_flattened_length(
                      width, height, stride0, inv_h0, inv_v0)) ||
      (src1.len < wuffs_private_impl__swizzle_flattened_length(
                      width, height, stride1, inv_h1, inv_v1)) ||
      (src2.len < wuffs_private_impl__swizzle_flattened_length(
                      width, height, stride2, inv_h2, inv_v2))) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((h3 != 0u) || (v3 != 0u)) {
    if (((h3 * inv_h3) != max_incl_h) ||  //
        ((v3 * inv_v3) != max_incl_v) ||  //
        (src3.len < wuffs_private_impl__swizzle_flattened_length(
                        width, height, stride3, inv_h3, inv_v3))) {
      return wuffs_base__make_status(wuffs_base__error__bad_argument);
    }
  }

  if (wuffs_base__pixel_format__is_planar(&dst->pixcfg.private_impl.pixfmt)) {
    // TODO: see wuffs_base__pixel_buffer__set_color_u32_at's TODO.
    return wuffs_base__make_status(
        wuffs_base__error__unsupported_pixel_swizzler_option);
  }

  // ----

#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ENABLE_ALLOWLIST)
  switch (dst->pixcfg.private_impl.pixfmt.repr) {
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_Y)
    case WUFFS_BASE__PIXEL_FORMAT__Y:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGR_565)
    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGR)
    case WUFFS_BASE__PIXEL_FORMAT__BGR:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGRA_NONPREMUL)
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGRA_NONPREMUL_4X16LE)
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_BGRA_PREMUL)
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_RGB)
    case WUFFS_BASE__PIXEL_FORMAT__RGB:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_RGBA_NONPREMUL)
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      break;
#endif
#if defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ALLOW_RGBA_PREMUL)
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      break;
#endif
    default:
      return wuffs_base__make_status(
          wuffs_base__error__disabled_by_wuffs_config_dst_pixel_format_enable_allowlist);
  }
#else   // defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ENABLE_ALLOWLIST)
  switch (dst->pixcfg.private_impl.pixfmt.repr) {
    case WUFFS_BASE__PIXEL_FORMAT__Y:
    case WUFFS_BASE__PIXEL_FORMAT__Y_16LE:
    case WUFFS_BASE__PIXEL_FORMAT__Y_16BE:
    case WUFFS_BASE__PIXEL_FORMAT__YA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
    case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
    case WUFFS_BASE__PIXEL_FORMAT__BGR:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
    case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__BGRX:
    case WUFFS_BASE__PIXEL_FORMAT__RGB:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
    case WUFFS_BASE__PIXEL_FORMAT__RGBX:
      break;

    default:
      // TODO: see wuffs_base__pixel_buffer__set_color_u32_at's TODO.
      return wuffs_base__make_status(
          wuffs_base__error__unsupported_pixel_swizzler_option);
  }
#endif  // defined(WUFFS_CONFIG__DST_PIXEL_FORMAT__ENABLE_ALLOWLIST)

  // ----

  wuffs_private_impl__swizzle_ycc__convert_3_func conv3func = NULL;

  if (is_rgb_or_cmyk) {
    conv3func = &wuffs_private_impl__swizzle_rgb__convert_3_general;
  } else {
    switch (dst->pixcfg.private_impl.pixfmt.repr) {
      case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      case WUFFS_BASE__PIXEL_FORMAT__BGRX:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
        if (wuffs_base__cpu_arch__have_x86_avx2()) {
          conv3func = &wuffs_private_impl__swizzle_ycc__convert_3_bgrx_x86_avx2;
          break;
        }
#endif
        conv3func = &wuffs_private_impl__swizzle_ycc__convert_3_bgrx;
        break;
      case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
      case WUFFS_BASE__PIXEL_FORMAT__RGBX:
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
        if (wuffs_base__cpu_arch__have_x86_avx2()) {
          conv3func = &wuffs_private_impl__swizzle_ycc__convert_3_rgbx_x86_avx2;
          break;
        }
#endif
        conv3func = &wuffs_private_impl__swizzle_ycc__convert_3_rgbx;
        break;
      default:
        conv3func = &wuffs_private_impl__swizzle_ycc__convert_3_general;
        break;
    }
  }

  void (*func3)(wuffs_base__pixel_buffer * dst,  //
                uint32_t x_min_incl,             //
                uint32_t x_max_excl,             //
                uint32_t y_min_incl,             //
                uint32_t y_max_excl,             //
                const uint8_t* src_ptr0,         //
                const uint8_t* src_ptr1,         //
                const uint8_t* src_ptr2,         //
                uint32_t stride0,                //
                uint32_t stride1,                //
                uint32_t stride2,                //
                uint32_t inv_h0,                 //
                uint32_t inv_h1,                 //
                uint32_t inv_h2,                 //
                uint32_t inv_v0,                 //
                uint32_t inv_v1,                 //
                uint32_t inv_v2,                 //
                uint32_t half_width_for_2to1,    //
                uint32_t half_height_for_2to1,   //
                uint8_t* scratch_buffer_2k_ptr,  //
                wuffs_private_impl__swizzle_ycc__upsample_func(*upfuncs)[4][4],
                wuffs_private_impl__swizzle_ycc__convert_3_func conv3func) =
      &wuffs_private_impl__swizzle_ycc__general__box_filter;

  void (*func4)(wuffs_base__pixel_buffer * dst,  //
                uint32_t x_min_incl,             //
                uint32_t x_max_excl,             //
                uint32_t y_min_incl,             //
                uint32_t y_max_excl,             //
                const uint8_t* src_ptr0,         //
                const uint8_t* src_ptr1,         //
                const uint8_t* src_ptr2,         //
                const uint8_t* src_ptr3,         //
                uint32_t stride0,                //
                uint32_t stride1,                //
                uint32_t stride2,                //
                uint32_t stride3,                //
                uint32_t inv_h0,                 //
                uint32_t inv_h1,                 //
                uint32_t inv_h2,                 //
                uint32_t inv_h3,                 //
                uint32_t inv_v0,                 //
                uint32_t inv_v1,                 //
                uint32_t inv_v2,                 //
                uint32_t inv_v3,                 //
                uint32_t half_width_for_2to1,    //
                uint32_t half_height_for_2to1,   //
                uint8_t* scratch_buffer_2k_ptr,  //
                wuffs_private_impl__swizzle_ycc__upsample_func(*upfuncs)[4][4],
                wuffs_private_impl__swizzle_ycc__convert_4_func conv4func) =
      &wuffs_private_impl__swizzle_ycck__general__box_filter;

  wuffs_private_impl__swizzle_ycc__upsample_func upfuncs[4][4];
  memcpy(&upfuncs, &wuffs_private_impl__swizzle_ycc__upsample_funcs,
         sizeof upfuncs);

  if (triangle_filter_for_2to1 &&
      (wuffs_private_impl__swizzle_has_triangle_upsampler(inv_h0, inv_v0) ||
       wuffs_private_impl__swizzle_has_triangle_upsampler(inv_h1, inv_v1) ||
       wuffs_private_impl__swizzle_has_triangle_upsampler(inv_h2, inv_v2) ||
       wuffs_private_impl__swizzle_has_triangle_upsampler(inv_h3, inv_v3))) {
    func3 = &wuffs_private_impl__swizzle_ycc__general__triangle_filter;
    func4 = &wuffs_private_impl__swizzle_ycck__general__triangle_filter;

    upfuncs[0][1] = wuffs_private_impl__swizzle_ycc__upsample_inv_h1v2_triangle;
    upfuncs[1][0] = wuffs_private_impl__swizzle_ycc__upsample_inv_h2v1_triangle;
    upfuncs[1][1] = wuffs_private_impl__swizzle_ycc__upsample_inv_h2v2_triangle;

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
#if defined(__GNUC__) && !defined(__clang__)
    // Don't use our AVX2 implementation for GCC (but do use it for clang). For
    // some unknown reason, GCC performs noticably better on the non-SIMD
    // version. Possibly because GCC's auto-vectorizer is smarter (just with
    // SSE2, not AVX2) than our hand-written code, but that's just a guess.
    //
    // See commits 51bc60ef9298cb2efc1b29a9681191f66d49820d and
    // cd769a0cdf1b5affee13f6089b995f3d39569cb4 for benchmark numbers.
    //
    // See also https://godbolt.org/z/MbhbPGEz4 for Debian Bullseye's clang 11
    // versus gcc 10, where only gcc auto-vectorizes, although later clang
    // versions will also auto-vectorize.
#else
    if (wuffs_base__cpu_arch__have_x86_avx2()) {
      upfuncs[1][1] =
          wuffs_private_impl__swizzle_ycc__upsample_inv_h2v2_triangle_x86_avx2;
    }
#endif
#endif
  }

  if ((h3 != 0u) || (v3 != 0u)) {
    wuffs_private_impl__swizzle_ycc__convert_4_func conv4func =
        is_rgb_or_cmyk ? &wuffs_private_impl__swizzle_cmyk__convert_4_general
                       : &wuffs_private_impl__swizzle_ycck__convert_4_general;
    (*func4)(                                                 //
        dst, x_min_incl, x_max_excl, y_min_incl, y_max_excl,  //
        src0.ptr, src1.ptr, src2.ptr, src3.ptr,               //
        stride0, stride1, stride2, stride3,                   //
        inv_h0, inv_h1, inv_h2, inv_h3,                       //
        inv_v0, inv_v1, inv_v2, inv_v3,                       //
        half_width_for_2to1, half_height_for_2to1,            //
        scratch_buffer_2k.ptr, &upfuncs, conv4func);

  } else {
    (*func3)(                                                 //
        dst, x_min_incl, x_max_excl, y_min_incl, y_max_excl,  //
        src0.ptr, src1.ptr, src2.ptr,                         //
        stride0, stride1, stride2,                            //
        inv_h0, inv_h1, inv_h2,                               //
        inv_v0, inv_v1, inv_v2,                               //
        half_width_for_2to1, half_height_for_2to1,            //
        scratch_buffer_2k.ptr, &upfuncs, conv3func);
  }

  return wuffs_base__make_status(NULL);
}

// --------

// ‼ WUFFS MULTI-FILE SECTION +x86_avx2
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2,avx2")
static void  //
wuffs_private_impl__swizzle_ycc__convert_3_bgrx_x86_avx2(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2) {
  if ((x + 32u) > x_end) {
    wuffs_private_impl__swizzle_ycc__convert_3_bgrx(  //
        dst, x, x_end, y, up0, up1, up2);
    return;
  }

  size_t dst_stride = dst->private_impl.planes[0].stride;
  uint8_t* dst_iter = dst->private_impl.planes[0].ptr +
                      (dst_stride * ((size_t)y)) + (4u * ((size_t)x));

  // u0001 = u16x16 [0x0001 .. 0x0001]
  // u00FF = u16x16 [0x00FF .. 0x00FF]
  // uFF80 = u16x16 [0xFF80 .. 0xFF80]
  // uFFFF = u16x16 [0xFFFF .. 0xFFFF]
  const __m256i u0001 = _mm256_set1_epi16(+0x0001);
  const __m256i u00FF = _mm256_set1_epi16(+0x00FF);
  const __m256i uFF80 = _mm256_set1_epi16(-0x0080);
  const __m256i uFFFF = _mm256_set1_epi16(-0x0001);

  // p8000_p0000 = u16x16 [0x8000 0x0000 .. 0x8000 0x0000]
  const __m256i p8000_p0000 = _mm256_set_epi16(  //
      +0x0000, -0x8000, +0x0000, -0x8000,        //
      +0x0000, -0x8000, +0x0000, -0x8000,        //
      +0x0000, -0x8000, +0x0000, -0x8000,        //
      +0x0000, -0x8000, +0x0000, -0x8000);

  // Per wuffs_base__color_ycc__as__color_u32, the formulae:
  //
  //  R = Y                + 1.40200 * Cr
  //  G = Y - 0.34414 * Cb - 0.71414 * Cr
  //  B = Y + 1.77200 * Cb
  //
  // When scaled by 1<<16:
  //
  //  0.34414 becomes 0x0581A =  22554.
  //  0.71414 becomes 0x0B6D2 =  46802.
  //  1.40200 becomes 0x166E9 =  91881.
  //  1.77200 becomes 0x1C5A2 = 116130.
  //
  // Separate the integer and fractional parts, since we work with signed
  // 16-bit SIMD lanes. The fractional parts range from -0.5 .. +0.5 (as
  // floating-point) which is from -0x8000 .. +0x8000 (as fixed-point).
  //
  //  -0x3A5E = -0x20000 + 0x1C5A2     The B:Cb factor.
  //  +0x66E9 = -0x10000 + 0x166E9     The R:Cr factor.
  //  -0x581A = +0x00000 - 0x0581A     The G:Cb factor.
  //  +0x492E = +0x10000 - 0x0B6D2     The G:Cr factor.
  const __m256i m3A5E = _mm256_set1_epi16(-0x3A5E);
  const __m256i p66E9 = _mm256_set1_epi16(+0x66E9);
  const __m256i m581A_p492E = _mm256_set_epi16(  //
      +0x492E, -0x581A, +0x492E, -0x581A,        //
      +0x492E, -0x581A, +0x492E, -0x581A,        //
      +0x492E, -0x581A, +0x492E, -0x581A,        //
      +0x492E, -0x581A, +0x492E, -0x581A);

  while (x < x_end) {
    // Load chroma values in even and odd columns (the high 8 bits of each
    // u16x16 element are zero) and then subtract 0x0080.
    //
    // cb_all = u8x32  [cb.00 cb.01 cb.02 cb.03 .. cb.1C cb.1D cb.1E cb.1F]
    // cb_eve = i16x16 [cb.00-0x80  cb.02-0x80  .. cb.1C-0x80  cb.1E-0x80 ]
    // cb_odd = i16x16 [cb.01-0x80  cb.03-0x80  .. cb.1D-0x80  cb.1F-0x80 ]
    //
    // Ditto for the cr_xxx Chroma-Red values.
    __m256i cb_all = _mm256_lddqu_si256((const __m256i*)(const void*)up1);
    __m256i cr_all = _mm256_lddqu_si256((const __m256i*)(const void*)up2);
    __m256i cb_eve = _mm256_add_epi16(uFF80, _mm256_and_si256(cb_all, u00FF));
    __m256i cr_eve = _mm256_add_epi16(uFF80, _mm256_and_si256(cr_all, u00FF));
    __m256i cb_odd = _mm256_add_epi16(uFF80, _mm256_srli_epi16(cb_all, 8));
    __m256i cr_odd = _mm256_add_epi16(uFF80, _mm256_srli_epi16(cr_all, 8));

    // ----

    // Calculate:
    //
    //  B-Y = (+1.77200 * Cb)                 as floating-point
    //  R-Y = (+1.40200 * Cr)                 as floating-point
    //
    //  B-Y = ((0x2_0000 - 0x3A5E) * Cb)      as fixed-point
    //  R-Y = ((0x1_0000 + 0x66E9) * Cr)      as fixed-point
    //
    //  B-Y = ((-0x3A5E * Cb) + ("2.0" * Cb))
    //  R-Y = ((+0x66E9 * Cr) + ("1.0" * Cr))

    // Multiply by m3A5E or p66E9, taking the high 16 bits. There's also a
    // doubling (add x to itself), adding-of-1 and halving (shift right by 1).
    // That makes multiply-and-take-high round to nearest (instead of down).
    __m256i tmp_by_eve = _mm256_srai_epi16(
        _mm256_add_epi16(
            _mm256_mulhi_epi16(_mm256_add_epi16(cb_eve, cb_eve), m3A5E), u0001),
        1);
    __m256i tmp_by_odd = _mm256_srai_epi16(
        _mm256_add_epi16(
            _mm256_mulhi_epi16(_mm256_add_epi16(cb_odd, cb_odd), m3A5E), u0001),
        1);
    __m256i tmp_ry_eve = _mm256_srai_epi16(
        _mm256_add_epi16(
            _mm256_mulhi_epi16(_mm256_add_epi16(cr_eve, cr_eve), p66E9), u0001),
        1);
    __m256i tmp_ry_odd = _mm256_srai_epi16(
        _mm256_add_epi16(
            _mm256_mulhi_epi16(_mm256_add_epi16(cr_odd, cr_odd), p66E9), u0001),
        1);

    // Add (2 * Cb) and (1 * Cr).
    __m256i by_eve =
        _mm256_add_epi16(tmp_by_eve, _mm256_add_epi16(cb_eve, cb_eve));
    __m256i by_odd =
        _mm256_add_epi16(tmp_by_odd, _mm256_add_epi16(cb_odd, cb_odd));
    __m256i ry_eve = _mm256_add_epi16(tmp_ry_eve, cr_eve);
    __m256i ry_odd = _mm256_add_epi16(tmp_ry_odd, cr_odd);

    // ----

    // Calculate:
    //
    //  G-Y = (-0.34414 * Cb) +
    //        (-0.71414 * Cr)                 as floating-point
    //
    //  G-Y = ((+0x0_0000 - 0x581A) * Cb) +
    //        ((-0x1_0000 + 0x492E) * Cr)     as fixed-point
    //
    //  G-Y =  (-0x581A * Cb) +
    //         (+0x492E * Cr) - ("1.0" * Cr)

    // Multiply-add to get ((-0x581A * Cb) + (+0x492E * Cr)).
    __m256i tmp0_gy_eve_lo = _mm256_madd_epi16(  //
        _mm256_unpacklo_epi16(cb_eve, cr_eve), m581A_p492E);
    __m256i tmp0_gy_eve_hi = _mm256_madd_epi16(  //
        _mm256_unpackhi_epi16(cb_eve, cr_eve), m581A_p492E);
    __m256i tmp0_gy_odd_lo = _mm256_madd_epi16(  //
        _mm256_unpacklo_epi16(cb_odd, cr_odd), m581A_p492E);
    __m256i tmp0_gy_odd_hi = _mm256_madd_epi16(  //
        _mm256_unpackhi_epi16(cb_odd, cr_odd), m581A_p492E);

    // Divide the i32x8 vectors by (1 << 16), rounding to nearest.
    __m256i tmp1_gy_eve_lo =
        _mm256_srai_epi32(_mm256_add_epi32(tmp0_gy_eve_lo, p8000_p0000), 16);
    __m256i tmp1_gy_eve_hi =
        _mm256_srai_epi32(_mm256_add_epi32(tmp0_gy_eve_hi, p8000_p0000), 16);
    __m256i tmp1_gy_odd_lo =
        _mm256_srai_epi32(_mm256_add_epi32(tmp0_gy_odd_lo, p8000_p0000), 16);
    __m256i tmp1_gy_odd_hi =
        _mm256_srai_epi32(_mm256_add_epi32(tmp0_gy_odd_hi, p8000_p0000), 16);

    // Pack the ((-0x581A * Cb) + (+0x492E * Cr)) as i16x16 and subtract Cr.
    __m256i gy_eve = _mm256_sub_epi16(
        _mm256_packs_epi32(tmp1_gy_eve_lo, tmp1_gy_eve_hi), cr_eve);
    __m256i gy_odd = _mm256_sub_epi16(
        _mm256_packs_epi32(tmp1_gy_odd_lo, tmp1_gy_odd_hi), cr_odd);

    // ----

    // Add Y to (B-Y), (G-Y) and (R-Y) to produce B, G and R.
    //
    // For the resultant packed_x_xxx vectors, only elements 0 ..= 7 and 16 ..=
    // 23 of the 32-element vectors matter (since we'll unpacklo but not
    // unpackhi them). Let … denote 8 ignored consecutive u8 values and let %
    // denote 0xFF. We'll end this section with:
    //
    // packed_b_eve = u8x32 [b00 b02 .. b0C b0E  …  b10 b12 .. b1C b1E  …]
    // packed_b_odd = u8x32 [b01 b03 .. b0D b0F  …  b11 b13 .. b1D b1F  …]
    // packed_g_eve = u8x32 [g00 g02 .. g0C g0E  …  g10 g12 .. g1C g1E  …]
    // packed_g_odd = u8x32 [g01 g03 .. g0D g0F  …  g11 g13 .. g1D g1F  …]
    // packed_r_eve = u8x32 [r00 r02 .. r0C r0E  …  r10 r12 .. r1C r1E  …]
    // packed_r_odd = u8x32 [r01 r03 .. r0D r0F  …  r11 r13 .. r1D r1F  …]
    // uFFFF        = u8x32 [  %   % ..   %   %  …    %   % ..   %   %  …]

    __m256i yy_all = _mm256_lddqu_si256((const __m256i*)(const void*)up0);
    __m256i yy_eve = _mm256_and_si256(yy_all, u00FF);
    __m256i yy_odd = _mm256_srli_epi16(yy_all, 8);

    __m256i loose_b_eve = _mm256_add_epi16(by_eve, yy_eve);
    __m256i loose_b_odd = _mm256_add_epi16(by_odd, yy_odd);
    __m256i packed_b_eve = _mm256_packus_epi16(loose_b_eve, loose_b_eve);
    __m256i packed_b_odd = _mm256_packus_epi16(loose_b_odd, loose_b_odd);

    __m256i loose_g_eve = _mm256_add_epi16(gy_eve, yy_eve);
    __m256i loose_g_odd = _mm256_add_epi16(gy_odd, yy_odd);
    __m256i packed_g_eve = _mm256_packus_epi16(loose_g_eve, loose_g_eve);
    __m256i packed_g_odd = _mm256_packus_epi16(loose_g_odd, loose_g_odd);

    __m256i loose_r_eve = _mm256_add_epi16(ry_eve, yy_eve);
    __m256i loose_r_odd = _mm256_add_epi16(ry_odd, yy_odd);
    __m256i packed_r_eve = _mm256_packus_epi16(loose_r_eve, loose_r_eve);
    __m256i packed_r_odd = _mm256_packus_epi16(loose_r_odd, loose_r_odd);

    // ----

    // Mix those values (unpacking in 8, 16 and then 32 bit units) to get the
    // desired BGRX/RGBX order.
    //
    // From here onwards, all of our __m256i registers are u8x32.

    // mix00 = [b00 g00 b02 g02 .. b0E g0E b10 g10 .. b1C g1C b1E g1E]
    // mix01 = [b01 g01 b03 g03 .. b0F g0F b11 g11 .. b1D g1D b1F g1F]
    // mix02 = [r00   % r02   % .. r0E   % r10   % .. r1C   % r1E   %]
    // mix03 = [r01   % r03   % .. r0F   % r11   % .. r1D   % r1F   %]
    //
    // See also § below.
    __m256i mix00 = _mm256_unpacklo_epi8(packed_b_eve, packed_g_eve);
    __m256i mix01 = _mm256_unpacklo_epi8(packed_b_odd, packed_g_odd);
    __m256i mix02 = _mm256_unpacklo_epi8(packed_r_eve, uFFFF);
    __m256i mix03 = _mm256_unpacklo_epi8(packed_r_odd, uFFFF);

    // mix10 = [b00 g00 r00 %  b02 g02 r02 %  b04 g04 r04 %  b06 g06 r06 %
    //          b10 g10 r10 %  b12 g12 r12 %  b14 g14 r14 %  b16 g16 r16 %]
    // mix11 = [b01 g01 r01 %  b03 g03 r03 %  b05 g05 r05 %  b07 g07 r07 %
    //          b11 g11 r11 %  b13 g13 r13 %  b15 g15 r15 %  b17 g17 r17 %]
    // mix12 = [b08 g08 r08 %  b0A g0A r0A %  b0C g0C r0C %  b0E g0E r0E %
    //          b18 g18 r18 %  b1A g1A r1A %  b1C g1C r1C %  b1E g1E r1E %]
    // mix13 = [b09 g09 r09 %  b0B g0B r0B %  b0D g0D r0D %  b0F g0F r0F %
    //          b19 g19 r19 %  b1B g1B r1B %  b1D g1D r1D %  b1F g1F r1F %]
    __m256i mix10 = _mm256_unpacklo_epi16(mix00, mix02);
    __m256i mix11 = _mm256_unpacklo_epi16(mix01, mix03);
    __m256i mix12 = _mm256_unpackhi_epi16(mix00, mix02);
    __m256i mix13 = _mm256_unpackhi_epi16(mix01, mix03);

    // mix20 = [b00 g00 r00 %  b01 g01 r01 %  b02 g02 r02 %  b03 g03 r03 %
    //          b10 g10 r10 %  b11 g11 r11 %  b12 g12 r12 %  b13 g13 r13 %]
    // mix21 = [b04 g04 r04 %  b05 g05 r05 %  b06 g06 r06 %  b07 g07 r07 %
    //          b14 g14 r14 %  b15 g15 r15 %  b16 g16 r16 %  b17 g17 r17 %]
    // mix22 = [b08 g08 r08 %  b09 g09 r09 %  b0A g0A r0A %  b0B g0B r0B %
    //          b18 g18 r18 %  b19 g19 r19 %  b1A g1A r1A %  b1B g1B r1B %]
    // mix23 = [b0C g0C r0C %  b0D g0D r0D %  b0E g0E r0E %  b0F g0F r0F %
    //          b1C g1C r1C %  b1D g1D r1D %  b1E g1E r1E %  b1F g1F r1F %]
    __m256i mix20 = _mm256_unpacklo_epi32(mix10, mix11);
    __m256i mix21 = _mm256_unpackhi_epi32(mix10, mix11);
    __m256i mix22 = _mm256_unpacklo_epi32(mix12, mix13);
    __m256i mix23 = _mm256_unpackhi_epi32(mix12, mix13);

    // mix30 = [b00 g00 r00 %  b01 g01 r01 %  b02 g02 r02 %  b03 g03 r03 %
    //          b04 g04 r04 %  b05 g05 r05 %  b06 g06 r06 %  b07 g07 r07 %]
    // mix31 = [b08 g08 r08 %  b09 g09 r09 %  b0A g0A r0A %  b0B g0B r0B %
    //          b0C g0C r0C %  b0D g0D r0D %  b0E g0E r0E %  b0F g0F r0F %]
    // mix32 = [b10 g10 r10 %  b11 g11 r11 %  b12 g12 r12 %  b13 g13 r13 %
    //          b14 g14 r14 %  b15 g15 r15 %  b16 g16 r16 %  b17 g17 r17 %]
    // mix33 = [b18 g18 r18 %  b19 g19 r19 %  b1A g1A r1A %  b1B g1B r1B %
    //          b1C g1C r1C %  b1D g1D r1D %  b1E g1E r1E %  b1F g1F r1F %]
    __m256i mix30 = _mm256_permute2x128_si256(mix20, mix21, 0x20);
    __m256i mix31 = _mm256_permute2x128_si256(mix22, mix23, 0x20);
    __m256i mix32 = _mm256_permute2x128_si256(mix20, mix21, 0x31);
    __m256i mix33 = _mm256_permute2x128_si256(mix22, mix23, 0x31);

    // Write out four u8x32 SIMD registers (128 bytes, 32 BGRX/RGBX pixels).
    _mm256_storeu_si256((__m256i*)(void*)(dst_iter + 0x00), mix30);
    _mm256_storeu_si256((__m256i*)(void*)(dst_iter + 0x20), mix31);
    _mm256_storeu_si256((__m256i*)(void*)(dst_iter + 0x40), mix32);
    _mm256_storeu_si256((__m256i*)(void*)(dst_iter + 0x60), mix33);

    // Advance by up to 32 pixels. The first iteration might be smaller than 32
    // so that all of the remaining steps are exactly 32.
    uint32_t n = 32u - (31u & (x - x_end));
    dst_iter += 4u * n;
    up0 += n;
    up1 += n;
    up2 += n;
    x += n;
  }
}

// The rgbx flavor (below) is exactly the same as the bgrx flavor (above)
// except for the lines marked with a § and that comments were stripped.
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2,avx2")
static void  //
wuffs_private_impl__swizzle_ycc__convert_3_rgbx_x86_avx2(
    wuffs_base__pixel_buffer* dst,
    uint32_t x,
    uint32_t x_end,
    uint32_t y,
    const uint8_t* up0,
    const uint8_t* up1,
    const uint8_t* up2) {
  if ((x + 32u) > x_end) {
    wuffs_private_impl__swizzle_ycc__convert_3_bgrx(  //
        dst, x, x_end, y, up0, up1, up2);
    return;
  }

  size_t dst_stride = dst->private_impl.planes[0].stride;
  uint8_t* dst_iter = dst->private_impl.planes[0].ptr +
                      (dst_stride * ((size_t)y)) + (4u * ((size_t)x));

  const __m256i u0001 = _mm256_set1_epi16(+0x0001);
  const __m256i u00FF = _mm256_set1_epi16(+0x00FF);
  const __m256i uFF80 = _mm256_set1_epi16(-0x0080);
  const __m256i uFFFF = _mm256_set1_epi16(-0x0001);

  const __m256i p8000_p0000 = _mm256_set_epi16(  //
      +0x0000, -0x8000, +0x0000, -0x8000,        //
      +0x0000, -0x8000, +0x0000, -0x8000,        //
      +0x0000, -0x8000, +0x0000, -0x8000,        //
      +0x0000, -0x8000, +0x0000, -0x8000);

  const __m256i m3A5E = _mm256_set1_epi16(-0x3A5E);
  const __m256i p66E9 = _mm256_set1_epi16(+0x66E9);
  const __m256i m581A_p492E = _mm256_set_epi16(  //
      +0x492E, -0x581A, +0x492E, -0x581A,        //
      +0x492E, -0x581A, +0x492E, -0x581A,        //
      +0x492E, -0x581A, +0x492E, -0x581A,        //
      +0x492E, -0x581A, +0x492E, -0x581A);

  while (x < x_end) {
    __m256i cb_all = _mm256_lddqu_si256((const __m256i*)(const void*)up1);
    __m256i cr_all = _mm256_lddqu_si256((const __m256i*)(const void*)up2);
    __m256i cb_eve = _mm256_add_epi16(uFF80, _mm256_and_si256(cb_all, u00FF));
    __m256i cr_eve = _mm256_add_epi16(uFF80, _mm256_and_si256(cr_all, u00FF));
    __m256i cb_odd = _mm256_add_epi16(uFF80, _mm256_srli_epi16(cb_all, 8));
    __m256i cr_odd = _mm256_add_epi16(uFF80, _mm256_srli_epi16(cr_all, 8));

    __m256i tmp_by_eve = _mm256_srai_epi16(
        _mm256_add_epi16(
            _mm256_mulhi_epi16(_mm256_add_epi16(cb_eve, cb_eve), m3A5E), u0001),
        1);
    __m256i tmp_by_odd = _mm256_srai_epi16(
        _mm256_add_epi16(
            _mm256_mulhi_epi16(_mm256_add_epi16(cb_odd, cb_odd), m3A5E), u0001),
        1);
    __m256i tmp_ry_eve = _mm256_srai_epi16(
        _mm256_add_epi16(
            _mm256_mulhi_epi16(_mm256_add_epi16(cr_eve, cr_eve), p66E9), u0001),
        1);
    __m256i tmp_ry_odd = _mm256_srai_epi16(
        _mm256_add_epi16(
            _mm256_mulhi_epi16(_mm256_add_epi16(cr_odd, cr_odd), p66E9), u0001),
        1);

    __m256i by_eve =
        _mm256_add_epi16(tmp_by_eve, _mm256_add_epi16(cb_eve, cb_eve));
    __m256i by_odd =
        _mm256_add_epi16(tmp_by_odd, _mm256_add_epi16(cb_odd, cb_odd));
    __m256i ry_eve = _mm256_add_epi16(tmp_ry_eve, cr_eve);
    __m256i ry_odd = _mm256_add_epi16(tmp_ry_odd, cr_odd);

    __m256i tmp0_gy_eve_lo = _mm256_madd_epi16(  //
        _mm256_unpacklo_epi16(cb_eve, cr_eve), m581A_p492E);
    __m256i tmp0_gy_eve_hi = _mm256_madd_epi16(  //
        _mm256_unpackhi_epi16(cb_eve, cr_eve), m581A_p492E);
    __m256i tmp0_gy_odd_lo = _mm256_madd_epi16(  //
        _mm256_unpacklo_epi16(cb_odd, cr_odd), m581A_p492E);
    __m256i tmp0_gy_odd_hi = _mm256_madd_epi16(  //
        _mm256_unpackhi_epi16(cb_odd, cr_odd), m581A_p492E);

    __m256i tmp1_gy_eve_lo =
        _mm256_srai_epi32(_mm256_add_epi32(tmp0_gy_eve_lo, p8000_p0000), 16);
    __m256i tmp1_gy_eve_hi =
        _mm256_srai_epi32(_mm256_add_epi32(tmp0_gy_eve_hi, p8000_p0000), 16);
    __m256i tmp1_gy_odd_lo =
        _mm256_srai_epi32(_mm256_add_epi32(tmp0_gy_odd_lo, p8000_p0000), 16);
    __m256i tmp1_gy_odd_hi =
        _mm256_srai_epi32(_mm256_add_epi32(tmp0_gy_odd_hi, p8000_p0000), 16);

    __m256i gy_eve = _mm256_sub_epi16(
        _mm256_packs_epi32(tmp1_gy_eve_lo, tmp1_gy_eve_hi), cr_eve);
    __m256i gy_odd = _mm256_sub_epi16(
        _mm256_packs_epi32(tmp1_gy_odd_lo, tmp1_gy_odd_hi), cr_odd);

    __m256i yy_all = _mm256_lddqu_si256((const __m256i*)(const void*)up0);
    __m256i yy_eve = _mm256_and_si256(yy_all, u00FF);
    __m256i yy_odd = _mm256_srli_epi16(yy_all, 8);

    __m256i loose_b_eve = _mm256_add_epi16(by_eve, yy_eve);
    __m256i loose_b_odd = _mm256_add_epi16(by_odd, yy_odd);
    __m256i packed_b_eve = _mm256_packus_epi16(loose_b_eve, loose_b_eve);
    __m256i packed_b_odd = _mm256_packus_epi16(loose_b_odd, loose_b_odd);

    __m256i loose_g_eve = _mm256_add_epi16(gy_eve, yy_eve);
    __m256i loose_g_odd = _mm256_add_epi16(gy_odd, yy_odd);
    __m256i packed_g_eve = _mm256_packus_epi16(loose_g_eve, loose_g_eve);
    __m256i packed_g_odd = _mm256_packus_epi16(loose_g_odd, loose_g_odd);

    __m256i loose_r_eve = _mm256_add_epi16(ry_eve, yy_eve);
    __m256i loose_r_odd = _mm256_add_epi16(ry_odd, yy_odd);
    __m256i packed_r_eve = _mm256_packus_epi16(loose_r_eve, loose_r_eve);
    __m256i packed_r_odd = _mm256_packus_epi16(loose_r_odd, loose_r_odd);

    // § Note the swapped B and R channels.
    __m256i mix00 = _mm256_unpacklo_epi8(packed_r_eve, packed_g_eve);
    __m256i mix01 = _mm256_unpacklo_epi8(packed_r_odd, packed_g_odd);
    __m256i mix02 = _mm256_unpacklo_epi8(packed_b_eve, uFFFF);
    __m256i mix03 = _mm256_unpacklo_epi8(packed_b_odd, uFFFF);

    __m256i mix10 = _mm256_unpacklo_epi16(mix00, mix02);
    __m256i mix11 = _mm256_unpacklo_epi16(mix01, mix03);
    __m256i mix12 = _mm256_unpackhi_epi16(mix00, mix02);
    __m256i mix13 = _mm256_unpackhi_epi16(mix01, mix03);

    __m256i mix20 = _mm256_unpacklo_epi32(mix10, mix11);
    __m256i mix21 = _mm256_unpackhi_epi32(mix10, mix11);
    __m256i mix22 = _mm256_unpacklo_epi32(mix12, mix13);
    __m256i mix23 = _mm256_unpackhi_epi32(mix12, mix13);

    __m256i mix30 = _mm256_permute2x128_si256(mix20, mix21, 0x20);
    __m256i mix31 = _mm256_permute2x128_si256(mix22, mix23, 0x20);
    __m256i mix32 = _mm256_permute2x128_si256(mix20, mix21, 0x31);
    __m256i mix33 = _mm256_permute2x128_si256(mix22, mix23, 0x31);

    _mm256_storeu_si256((__m256i*)(void*)(dst_iter + 0x00), mix30);
    _mm256_storeu_si256((__m256i*)(void*)(dst_iter + 0x20), mix31);
    _mm256_storeu_si256((__m256i*)(void*)(dst_iter + 0x40), mix32);
    _mm256_storeu_si256((__m256i*)(void*)(dst_iter + 0x60), mix33);

    uint32_t n = 32u - (31u & (x - x_end));
    dst_iter += 4u * n;
    up0 += n;
    up1 += n;
    up2 += n;
    x += n;
  }
}

#if defined(__GNUC__) && !defined(__clang__)
// No-op.
#else
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2,avx2")
static const uint8_t*  //
wuffs_private_impl__swizzle_ycc__upsample_inv_h2v2_triangle_x86_avx2(
    uint8_t* dst_ptr,
    const uint8_t* src_ptr_major,
    const uint8_t* src_ptr_minor,
    size_t src_len,
    uint32_t h1v2_bias_ignored,
    bool first_column,
    bool last_column) {
  uint8_t* dp = dst_ptr;
  const uint8_t* sp_major = src_ptr_major;
  const uint8_t* sp_minor = src_ptr_minor;

  if (first_column) {
    src_len--;
    if ((src_len <= 0u) && last_column) {
      uint32_t sv = (12u * ((uint32_t)(*sp_major++))) +  //
                    (4u * ((uint32_t)(*sp_minor++)));
      *dp++ = (uint8_t)((sv + 8u) >> 4u);
      *dp++ = (uint8_t)((sv + 7u) >> 4u);
      return dst_ptr;
    }

    uint32_t sv_major_m1 = sp_major[-0];  // Clamp offset to zero.
    uint32_t sv_minor_m1 = sp_minor[-0];  // Clamp offset to zero.
    uint32_t sv_major_p1 = sp_major[+1];
    uint32_t sv_minor_p1 = sp_minor[+1];

    uint32_t sv = (9u * ((uint32_t)(*sp_major++))) +  //
                  (3u * ((uint32_t)(*sp_minor++)));
    *dp++ = (uint8_t)((sv + (3u * sv_major_m1) + (sv_minor_m1) + 8u) >> 4u);
    *dp++ = (uint8_t)((sv + (3u * sv_major_p1) + (sv_minor_p1) + 7u) >> 4u);
    if (src_len <= 0u) {
      return dst_ptr;
    }
  }

  if (last_column) {
    src_len--;
  }

  if (src_len < 32) {
    // This fallback is the same as the non-SIMD-capable code path.
    for (; src_len > 0u; src_len--) {
      uint32_t sv_major_m1 = sp_major[-1];
      uint32_t sv_minor_m1 = sp_minor[-1];
      uint32_t sv_major_p1 = sp_major[+1];
      uint32_t sv_minor_p1 = sp_minor[+1];

      uint32_t sv = (9u * ((uint32_t)(*sp_major++))) +  //
                    (3u * ((uint32_t)(*sp_minor++)));
      *dp++ = (uint8_t)((sv + (3u * sv_major_m1) + (sv_minor_m1) + 8u) >> 4u);
      *dp++ = (uint8_t)((sv + (3u * sv_major_p1) + (sv_minor_p1) + 7u) >> 4u);
    }

  } else {
    while (src_len > 0u) {
      // Load 1+32+1 samples (six u8x32 vectors) from the major (jxx) and minor
      // (nxx) rows.
      //
      // major_p0 = [j00 j01 j02 j03 .. j28 j29 j30 j31]   // p0 = "plus  0"
      // minor_p0 = [n00 n01 n02 n03 .. n28 n29 n30 n31]   // p0 = "plus  0"
      // major_m1 = [jm1 j00 j01 j02 .. j27 j28 j29 j30]   // m1 = "minus 1"
      // minor_m1 = [nm1 n00 n01 n02 .. n27 n28 n29 n30]   // m1 = "minus 1"
      // major_p1 = [j01 j02 j03 j04 .. j29 j30 j31 j32]   // p1 = "plus  1"
      // minor_p1 = [n01 n02 n03 n04 .. n29 n30 n31 n32]   // p1 = "plus  1"
      __m256i major_p0 =
          _mm256_lddqu_si256((const __m256i*)(const void*)(sp_major + 0));
      __m256i minor_p0 =
          _mm256_lddqu_si256((const __m256i*)(const void*)(sp_minor + 0));
      __m256i major_m1 =
          _mm256_lddqu_si256((const __m256i*)(const void*)(sp_major - 1));
      __m256i minor_m1 =
          _mm256_lddqu_si256((const __m256i*)(const void*)(sp_minor - 1));
      __m256i major_p1 =
          _mm256_lddqu_si256((const __m256i*)(const void*)(sp_major + 1));
      __m256i minor_p1 =
          _mm256_lddqu_si256((const __m256i*)(const void*)(sp_minor + 1));

      // Unpack, staying with u8x32 vectors.
      //
      // step1_p0_lo = [j00 n00 j01 n01 .. j07 n07  j16 n16 j17 n17 .. j23 n23]
      // step1_p0_hi = [j08 n08 j09 n09 .. j15 n15  j24 n24 j25 n25 .. j31 n31]
      // step1_m1_lo = [jm1 nm1 j00 n00 .. j06 n06  j15 n15 j16 n16 .. j22 n22]
      // step1_m1_hi = [j07 n07 j08 n08 .. j14 n14  j23 n23 j24 n24 .. j30 n30]
      // step1_p1_lo = [j01 n01 j02 n02 .. j08 n08  j17 n17 j18 n18 .. j24 n24]
      // step1_p1_hi = [j09 n09 j10 n10 .. j16 n16  j25 n25 j26 n26 .. j32 n32]
      __m256i step1_p0_lo = _mm256_unpacklo_epi8(major_p0, minor_p0);
      __m256i step1_p0_hi = _mm256_unpackhi_epi8(major_p0, minor_p0);
      __m256i step1_m1_lo = _mm256_unpacklo_epi8(major_m1, minor_m1);
      __m256i step1_m1_hi = _mm256_unpackhi_epi8(major_m1, minor_m1);
      __m256i step1_p1_lo = _mm256_unpacklo_epi8(major_p1, minor_p1);
      __m256i step1_p1_hi = _mm256_unpackhi_epi8(major_p1, minor_p1);

      // Multiply-add to get u16x16 vectors.
      //
      // step2_p0_lo = [9*j00+3*n00 9*j01+3*n01 .. 9*j23+3*n23]
      // step2_p0_hi = [9*j08+3*n08 9*j09+3*n09 .. 9*j31+3*n31]
      // step2_m1_lo = [3*jm1+1*nm1 3*j00+1*n00 .. 3*j22+1*n22]
      // step2_m1_hi = [3*j07+1*n07 3*j08+1*n08 .. 3*j30+1*n30]
      // step2_p1_lo = [3*j01+1*n01 3*j02+1*n02 .. 3*j24+1*n24]
      // step2_p1_hi = [3*j09+1*n09 3*j10+1*n10 .. 3*j32+1*n32]
      const __m256i k0309 = _mm256_set1_epi16(0x0309);
      const __m256i k0103 = _mm256_set1_epi16(0x0103);
      __m256i step2_p0_lo = _mm256_maddubs_epi16(step1_p0_lo, k0309);
      __m256i step2_p0_hi = _mm256_maddubs_epi16(step1_p0_hi, k0309);
      __m256i step2_m1_lo = _mm256_maddubs_epi16(step1_m1_lo, k0103);
      __m256i step2_m1_hi = _mm256_maddubs_epi16(step1_m1_hi, k0103);
      __m256i step2_p1_lo = _mm256_maddubs_epi16(step1_p1_lo, k0103);
      __m256i step2_p1_hi = _mm256_maddubs_epi16(step1_p1_hi, k0103);

      // Compute the weighted sums of (p0, m1) and (p0, p1). For example:
      //
      // step3_m1_lo[00] = ((9*j00) + (3*n00) + (3*jm1) + (1*nm1)) as u16
      // step3_p1_hi[15] = ((9*j31) + (3*n31) + (3*j32) + (1*n32)) as u16
      __m256i step3_m1_lo = _mm256_add_epi16(step2_p0_lo, step2_m1_lo);
      __m256i step3_m1_hi = _mm256_add_epi16(step2_p0_hi, step2_m1_hi);
      __m256i step3_p1_lo = _mm256_add_epi16(step2_p0_lo, step2_p1_lo);
      __m256i step3_p1_hi = _mm256_add_epi16(step2_p0_hi, step2_p1_hi);

      // Bias by 8 (on the left) or 7 (on the right) and then divide by 16
      // (which is 9+3+3+1) to get a weighted average. On the left (m1), shift
      // the u16 right value by 4. On the right (p1), shift right by 4 and then
      // shift left by 8 so that, when still in the u16x16 little-endian
      // interpretation, we have:
      //  - m1_element =  (etcetera + 8) >> 4
      //  - p1_element = ((etcetera + 7) >> 4) << 8
      //
      // step4_m1_lo = [0x00?? 0x00?? ... 0x00?? 0x00??]
      // step4_p1_lo = [0x??00 0x??00 ... 0x??00 0x??00]
      // step4_m1_hi = [0x00?? 0x00?? ... 0x00?? 0x00??]
      // step4_p1_hi = [0x??00 0x??00 ... 0x??00 0x??00]
      __m256i step4_m1_lo = _mm256_srli_epi16(
          _mm256_add_epi16(step3_m1_lo, _mm256_set1_epi16(8)), 4);
      __m256i step4_p1_lo = _mm256_slli_epi16(
          _mm256_srli_epi16(_mm256_add_epi16(step3_p1_lo, _mm256_set1_epi16(7)),
                            4),
          8);
      __m256i step4_m1_hi = _mm256_srli_epi16(
          _mm256_add_epi16(step3_m1_hi, _mm256_set1_epi16(8)), 4);
      __m256i step4_p1_hi = _mm256_slli_epi16(
          _mm256_srli_epi16(_mm256_add_epi16(step3_p1_hi, _mm256_set1_epi16(7)),
                            4),
          8);

      // Bitwise-or two "0x00"-rich u16x16 vectors to get a u8x32 vector. Do
      // that twice. Once for the low columns and once for the high columns.
      //
      // In terms of jxx (major row) or nxx (minor row) source samples:
      //  - low  columns means ( 0 ..  8; 16 .. 24).
      //  - high columns means ( 8 .. 16; 24 .. 32).
      //
      // In terms of dxx destination samples (there are twice as many):
      //  - low  columns means ( 0 .. 16; 32 .. 48).
      //  - high columns means (16 .. 32; 48 .. 64).
      //
      // step5_lo = [d00 d01 .. d14 d15  d32 d33 .. d46 d47]
      // step5_hi = [d16 d17 .. d30 d31  d48 d49 .. d62 d63]
      //
      // The d00, d02 ... d62 even elements come from (p0, m1) weighted sums.
      // The d01, d03 ... d63 odd  elements come from (p0, p1) weighted sums.
      __m256i step5_lo = _mm256_or_si256(step4_m1_lo, step4_p1_lo);
      __m256i step5_hi = _mm256_or_si256(step4_m1_hi, step4_p1_hi);

      // Permute and store.
      //
      // step6_00_31 = [d00 d01 .. d14 d15  d16 d17 .. d30 d31]
      // step6_32_63 = [d32 d33 .. d46 d47  d48 d49 .. d62 d63]
      __m256i step6_00_31 = _mm256_permute2x128_si256(step5_lo, step5_hi, 0x20);
      __m256i step6_32_63 = _mm256_permute2x128_si256(step5_lo, step5_hi, 0x31);
      _mm256_storeu_si256((__m256i*)(void*)(dp + 0x00), step6_00_31);
      _mm256_storeu_si256((__m256i*)(void*)(dp + 0x20), step6_32_63);

      // Advance by up to 32 source samples (64 destination samples). The first
      // iteration might be smaller than 32 so that all of the remaining steps
      // are exactly 32.
      size_t n = 32u - (31u & (0u - src_len));
      dp += 2u * n;
      sp_major += n;
      sp_minor += n;
      src_len -= n;
    }
  }

  if (last_column) {
    uint32_t sv_major_m1 = sp_major[-1];
    uint32_t sv_minor_m1 = sp_minor[-1];
    uint32_t sv_major_p1 = sp_major[+0];  // Clamp offset to zero.
    uint32_t sv_minor_p1 = sp_minor[+0];  // Clamp offset to zero.

    uint32_t sv = (9u * ((uint32_t)(*sp_major++))) +  //
                  (3u * ((uint32_t)(*sp_minor++)));
    *dp++ = (uint8_t)((sv + (3u * sv_major_m1) + (sv_minor_m1) + 8u) >> 4u);
    *dp++ = (uint8_t)((sv + (3u * sv_major_p1) + (sv_minor_p1) + 7u) >> 4u);
  }

  return dst_ptr;
}
#endif
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
// ‼ WUFFS MULTI-FILE SECTION -x86_avx2

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__BASE) ||
        // defined(WUFFS_CONFIG__MODULE__BASE__PIXCONV)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE) || \
    defined(WUFFS_CONFIG__MODULE__BASE__UTF8)

// ---------------- Unicode and UTF-8

WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__utf_8__encode(wuffs_base__slice_u8 dst, uint32_t code_point) {
  if (code_point <= 0x7F) {
    if (dst.len >= 1) {
      dst.ptr[0] = (uint8_t)(code_point);
      return 1;
    }

  } else if (code_point <= 0x07FF) {
    if (dst.len >= 2) {
      dst.ptr[0] = (uint8_t)(0xC0 | ((code_point >> 6)));
      dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));
      return 2;
    }

  } else if (code_point <= 0xFFFF) {
    if ((dst.len >= 3) && ((code_point < 0xD800) || (0xDFFF < code_point))) {
      dst.ptr[0] = (uint8_t)(0xE0 | ((code_point >> 12)));
      dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3F));
      dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));
      return 3;
    }

  } else if (code_point <= 0x10FFFF) {
    if (dst.len >= 4) {
      dst.ptr[0] = (uint8_t)(0xF0 | ((code_point >> 18)));
      dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 12) & 0x3F));
      dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3F));
      dst.ptr[3] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));
      return 4;
    }
  }

  return 0;
}

// wuffs_base__utf_8__byte_length_minus_1 is the byte length (minus 1) of a
// UTF-8 encoded code point, based on the encoding's initial byte.
//  - 0x00 is 1-byte UTF-8 (ASCII).
//  - 0x01 is the start of 2-byte UTF-8.
//  - 0x02 is the start of 3-byte UTF-8.
//  - 0x03 is the start of 4-byte UTF-8.
//  - 0x40 is a UTF-8 tail byte.
//  - 0x80 is invalid UTF-8.
//
// RFC 3629 (UTF-8) gives this grammar for valid UTF-8:
//    UTF8-1      = %x00-7F
//    UTF8-2      = %xC2-DF UTF8-tail
//    UTF8-3      = %xE0 %xA0-BF UTF8-tail / %xE1-EC 2( UTF8-tail ) /
//                  %xED %x80-9F UTF8-tail / %xEE-EF 2( UTF8-tail )
//    UTF8-4      = %xF0 %x90-BF 2( UTF8-tail ) / %xF1-F3 3( UTF8-tail ) /
//                  %xF4 %x80-8F 2( UTF8-tail )
//    UTF8-tail   = %x80-BF
static const uint8_t wuffs_base__utf_8__byte_length_minus_1[256] = {
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x00 ..= 0x07.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x08 ..= 0x0F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x10 ..= 0x17.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x18 ..= 0x1F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x20 ..= 0x27.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x28 ..= 0x2F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x30 ..= 0x37.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x38 ..= 0x3F.

    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x40 ..= 0x47.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x48 ..= 0x4F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x50 ..= 0x57.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x58 ..= 0x5F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x60 ..= 0x67.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x68 ..= 0x6F.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x70 ..= 0x77.
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x78 ..= 0x7F.

    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0x80 ..= 0x87.
    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0x88 ..= 0x8F.
    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0x90 ..= 0x97.
    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0x98 ..= 0x9F.
    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0xA0 ..= 0xA7.
    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0xA8 ..= 0xAF.
    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0xB0 ..= 0xB7.
    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0xB8 ..= 0xBF.

    0x80, 0x80, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,  // 0xC0 ..= 0xC7.
    0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,  // 0xC8 ..= 0xCF.
    0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,  // 0xD0 ..= 0xD7.
    0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,  // 0xD8 ..= 0xDF.
    0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,  // 0xE0 ..= 0xE7.
    0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,  // 0xE8 ..= 0xEF.
    0x03, 0x03, 0x03, 0x03, 0x03, 0x80, 0x80, 0x80,  // 0xF0 ..= 0xF7.
    0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,  // 0xF8 ..= 0xFF.
    // 0     1     2     3     4     5     6     7
    // 8     9     A     B     C     D     E     F
};

WUFFS_BASE__MAYBE_STATIC wuffs_base__utf_8__next__output  //
wuffs_base__utf_8__next(const uint8_t* s_ptr, size_t s_len) {
  if (s_len == 0) {
    return wuffs_base__make_utf_8__next__output(0, 0);
  }
  uint32_t c = s_ptr[0];
  switch (wuffs_base__utf_8__byte_length_minus_1[c & 0xFF]) {
    case 0:
      return wuffs_base__make_utf_8__next__output(c, 1);

    case 1:
      if (s_len < 2) {
        break;
      }
      c = wuffs_base__peek_u16le__no_bounds_check(s_ptr);
      if ((c & 0xC000) != 0x8000) {
        break;
      }
      c = (0x0007C0 & (c << 6)) | (0x00003F & (c >> 8));
      return wuffs_base__make_utf_8__next__output(c, 2);

    case 2:
      if (s_len < 3) {
        break;
      }
      c = wuffs_base__peek_u24le__no_bounds_check(s_ptr);
      if ((c & 0xC0C000) != 0x808000) {
        break;
      }
      c = (0x00F000 & (c << 12)) | (0x000FC0 & (c >> 2)) |
          (0x00003F & (c >> 16));
      if ((c <= 0x07FF) || ((0xD800 <= c) && (c <= 0xDFFF))) {
        break;
      }
      return wuffs_base__make_utf_8__next__output(c, 3);

    case 3:
      if (s_len < 4) {
        break;
      }
      c = wuffs_base__peek_u32le__no_bounds_check(s_ptr);
      if ((c & 0xC0C0C000) != 0x80808000) {
        break;
      }
      c = (0x1C0000 & (c << 18)) | (0x03F000 & (c << 4)) |
          (0x000FC0 & (c >> 10)) | (0x00003F & (c >> 24));
      if ((c <= 0xFFFF) || (0x110000 <= c)) {
        break;
      }
      return wuffs_base__make_utf_8__next__output(c, 4);
  }

  return wuffs_base__make_utf_8__next__output(
      WUFFS_BASE__UNICODE_REPLACEMENT_CHARACTER, 1);
}

WUFFS_BASE__MAYBE_STATIC wuffs_base__utf_8__next__output  //
wuffs_base__utf_8__next_from_end(const uint8_t* s_ptr, size_t s_len) {
  if (s_len == 0) {
    return wuffs_base__make_utf_8__next__output(0, 0);
  }
  const uint8_t* ptr = &s_ptr[s_len - 1];
  if (*ptr < 0x80) {
    return wuffs_base__make_utf_8__next__output(*ptr, 1);

  } else if (*ptr < 0xC0) {
    const uint8_t* too_far = &s_ptr[(s_len > 4) ? (s_len - 4) : 0];
    uint32_t n = 1;
    while (ptr != too_far) {
      ptr--;
      n++;
      if (*ptr < 0x80) {
        break;
      } else if (*ptr < 0xC0) {
        continue;
      }
      wuffs_base__utf_8__next__output o = wuffs_base__utf_8__next(ptr, n);
      if (o.byte_length != n) {
        break;
      }
      return o;
    }
  }

  return wuffs_base__make_utf_8__next__output(
      WUFFS_BASE__UNICODE_REPLACEMENT_CHARACTER, 1);
}

WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__utf_8__longest_valid_prefix(const uint8_t* s_ptr, size_t s_len) {
  // TODO: possibly optimize the all-ASCII case (4 or 8 bytes at a time).
  //
  // TODO: possibly optimize this by manually inlining the
  // wuffs_base__utf_8__next calls.
  size_t original_len = s_len;
  while (s_len > 0) {
    wuffs_base__utf_8__next__output o = wuffs_base__utf_8__next(s_ptr, s_len);
    if ((o.code_point > 0x7F) && (o.byte_length == 1)) {
      break;
    }
    s_ptr += o.byte_length;
    s_len -= o.byte_length;
  }
  return original_len - s_len;
}

WUFFS_BASE__MAYBE_STATIC size_t  //
wuffs_base__ascii__longest_valid_prefix(const uint8_t* s_ptr, size_t s_len) {
  // TODO: possibly optimize this by checking 4 or 8 bytes at a time.
  const uint8_t* original_ptr = s_ptr;
  const uint8_t* p = s_ptr;
  const uint8_t* q = s_ptr + s_len;
  for (; (p != q) && ((*p & 0x80) == 0); p++) {
  }
  return (size_t)(p - original_ptr);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__BASE) ||
        // defined(WUFFS_CONFIG__MODULE__BASE__UTF8)

#ifdef __cplusplus
}  // extern "C"
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ADLER32)

// ---------------- Status Codes Implementations

// ---------------- Private Consts

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_adler32__hasher__up(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_adler32__hasher__up__choosy_default(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x);

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_adler32__hasher__up_arm_neon(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_adler32__hasher__up_x86_sse42(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)

// ---------------- VTables

const wuffs_base__hasher_u32__func_ptrs
wuffs_adler32__hasher__func_ptrs_for__wuffs_base__hasher_u32 = {
  (uint32_t(*)(const void*))(&wuffs_adler32__hasher__checksum_u32),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_adler32__hasher__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_adler32__hasher__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      wuffs_base__slice_u8))(&wuffs_adler32__hasher__update),
  (uint32_t(*)(void*,
      wuffs_base__slice_u8))(&wuffs_adler32__hasher__update_u32),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_adler32__hasher__initialize(
    wuffs_adler32__hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.choosy_up = &wuffs_adler32__hasher__up__choosy_default;

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__hasher_u32.vtable_name =
      wuffs_base__hasher_u32__vtable_name;
  self->private_impl.vtable_for__wuffs_base__hasher_u32.function_pointers =
      (const void*)(&wuffs_adler32__hasher__func_ptrs_for__wuffs_base__hasher_u32);
  return wuffs_base__make_status(NULL);
}

wuffs_adler32__hasher*
wuffs_adler32__hasher__alloc(void) {
  wuffs_adler32__hasher* x =
      (wuffs_adler32__hasher*)(calloc(1, sizeof(wuffs_adler32__hasher)));
  if (!x) {
    return NULL;
  }
  if (wuffs_adler32__hasher__initialize(
      x, sizeof(wuffs_adler32__hasher), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_adler32__hasher(void) {
  return sizeof(wuffs_adler32__hasher);
}

// ---------------- Function Implementations

// -------- func adler32.hasher.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_adler32__hasher__get_quirk(
    const wuffs_adler32__hasher* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func adler32.hasher.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_adler32__hasher__set_quirk(
    wuffs_adler32__hasher* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func adler32.hasher.update

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_adler32__hasher__update(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  if ( ! self->private_impl.f_started) {
    self->private_impl.f_started = true;
    self->private_impl.f_state = 1u;
    self->private_impl.choosy_up = (
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
        wuffs_base__cpu_arch__have_arm_neon() ? &wuffs_adler32__hasher__up_arm_neon :
#endif
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
        wuffs_base__cpu_arch__have_x86_sse42() ? &wuffs_adler32__hasher__up_x86_sse42 :
#endif
        self->private_impl.choosy_up);
  }
  wuffs_adler32__hasher__up(self, a_x);
  return wuffs_base__make_empty_struct();
}

// -------- func adler32.hasher.update_u32

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_adler32__hasher__update_u32(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return 0;
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return 0;
  }

  wuffs_adler32__hasher__update(self, a_x);
  return self->private_impl.f_state;
}

// -------- func adler32.hasher.up

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_adler32__hasher__up(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x) {
  return (*self->private_impl.choosy_up)(self, a_x);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_adler32__hasher__up__choosy_default(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x) {
  uint32_t v_s1 = 0;
  uint32_t v_s2 = 0;
  wuffs_base__slice_u8 v_remaining = {0};
  wuffs_base__slice_u8 v_p = {0};

  v_s1 = ((self->private_impl.f_state) & 0xFFFFu);
  v_s2 = ((self->private_impl.f_state) >> (32u - 16u));
  while (((uint64_t)(a_x.len)) > 0u) {
    v_remaining = wuffs_base__slice_u8__subslice_j(a_x, 0u);
    if (((uint64_t)(a_x.len)) > 5552u) {
      v_remaining = wuffs_base__slice_u8__subslice_i(a_x, 5552u);
      a_x = wuffs_base__slice_u8__subslice_j(a_x, 5552u);
    }
    {
      wuffs_base__slice_u8 i_slice_p = a_x;
      v_p.ptr = i_slice_p.ptr;
      v_p.len = 1;
      const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 8) * 8));
      while (v_p.ptr < i_end0_p) {
        v_s1 += ((uint32_t)(v_p.ptr[0u]));
        v_s2 += v_s1;
        v_p.ptr += 1;
        v_s1 += ((uint32_t)(v_p.ptr[0u]));
        v_s2 += v_s1;
        v_p.ptr += 1;
        v_s1 += ((uint32_t)(v_p.ptr[0u]));
        v_s2 += v_s1;
        v_p.ptr += 1;
        v_s1 += ((uint32_t)(v_p.ptr[0u]));
        v_s2 += v_s1;
        v_p.ptr += 1;
        v_s1 += ((uint32_t)(v_p.ptr[0u]));
        v_s2 += v_s1;
        v_p.ptr += 1;
        v_s1 += ((uint32_t)(v_p.ptr[0u]));
        v_s2 += v_s1;
        v_p.ptr += 1;
        v_s1 += ((uint32_t)(v_p.ptr[0u]));
        v_s2 += v_s1;
        v_p.ptr += 1;
        v_s1 += ((uint32_t)(v_p.ptr[0u]));
        v_s2 += v_s1;
        v_p.ptr += 1;
      }
      v_p.len = 1;
      const uint8_t* i_end1_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
      while (v_p.ptr < i_end1_p) {
        v_s1 += ((uint32_t)(v_p.ptr[0u]));
        v_s2 += v_s1;
        v_p.ptr += 1;
      }
      v_p.len = 0;
    }
    v_s1 %= 65521u;
    v_s2 %= 65521u;
    a_x = v_remaining;
  }
  self->private_impl.f_state = (((v_s2 & 65535u) << 16u) | (v_s1 & 65535u));
  return wuffs_base__make_empty_struct();
}

// -------- func adler32.hasher.checksum_u32

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_adler32__hasher__checksum_u32(
    const wuffs_adler32__hasher* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return self->private_impl.f_state;
}

// ‼ WUFFS MULTI-FILE SECTION +arm_neon
// -------- func adler32.hasher.up_arm_neon

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_adler32__hasher__up_arm_neon(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x) {
  uint32_t v_s1 = 0;
  uint32_t v_s2 = 0;
  wuffs_base__slice_u8 v_remaining = {0};
  wuffs_base__slice_u8 v_p = {0};
  uint8x16_t v_p__left = {0};
  uint8x16_t v_p_right = {0};
  uint32x4_t v_v1 = {0};
  uint32x4_t v_v2 = {0};
  uint16x8_t v_col0 = {0};
  uint16x8_t v_col1 = {0};
  uint16x8_t v_col2 = {0};
  uint16x8_t v_col3 = {0};
  uint32x2_t v_sum1 = {0};
  uint32x2_t v_sum2 = {0};
  uint32x2_t v_sum12 = {0};
  uint32_t v_num_iterate_bytes = 0;
  uint64_t v_tail_index = 0;

  v_s1 = ((self->private_impl.f_state) & 0xFFFFu);
  v_s2 = ((self->private_impl.f_state) >> (32u - 16u));
  while ((((uint64_t)(a_x.len)) > 0u) && ((15u & ((uint32_t)(0xFFFu & (uintptr_t)(a_x.ptr)))) != 0u)) {
    v_s1 += ((uint32_t)(a_x.ptr[0u]));
    v_s2 += v_s1;
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 1u);
  }
  v_s1 %= 65521u;
  v_s2 %= 65521u;
  while (((uint64_t)(a_x.len)) > 0u) {
    v_remaining = wuffs_base__slice_u8__subslice_j(a_x, 0u);
    if (((uint64_t)(a_x.len)) > 5536u) {
      v_remaining = wuffs_base__slice_u8__subslice_i(a_x, 5536u);
      a_x = wuffs_base__slice_u8__subslice_j(a_x, 5536u);
    }
    v_num_iterate_bytes = ((uint32_t)((((uint64_t)(a_x.len)) & 4294967264u)));
    v_s2 += ((uint32_t)(v_s1 * v_num_iterate_bytes));
    v_v1 = vdupq_n_u32(0u);
    v_v2 = vdupq_n_u32(0u);
    v_col0 = vdupq_n_u16(0u);
    v_col1 = vdupq_n_u16(0u);
    v_col2 = vdupq_n_u16(0u);
    v_col3 = vdupq_n_u16(0u);
    {
      wuffs_base__slice_u8 i_slice_p = a_x;
      v_p.ptr = i_slice_p.ptr;
      v_p.len = 32;
      const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 32) * 32));
      while (v_p.ptr < i_end0_p) {
        v_p__left = vld1q_u8(v_p.ptr);
        v_p_right = vld1q_u8(v_p.ptr + 16u);
        v_v2 = vaddq_u32(v_v2, v_v1);
        v_v1 = vpadalq_u16(v_v1, vpadalq_u8(vpaddlq_u8(v_p__left), v_p_right));
        v_col0 = vaddw_u8(v_col0, vget_low_u8(v_p__left));
        v_col1 = vaddw_u8(v_col1, vget_high_u8(v_p__left));
        v_col2 = vaddw_u8(v_col2, vget_low_u8(v_p_right));
        v_col3 = vaddw_u8(v_col3, vget_high_u8(v_p_right));
        v_p.ptr += 32;
      }
      v_p.len = 0;
    }
    v_v2 = vshlq_n_u32(v_v2, 5u);
    v_v2 = vmlal_u16(v_v2, vget_low_u16(v_col0), ((uint16x4_t){32u, 31u, 30u, 29u}));
    v_v2 = vmlal_u16(v_v2, vget_high_u16(v_col0), ((uint16x4_t){28u, 27u, 26u, 25u}));
    v_v2 = vmlal_u16(v_v2, vget_low_u16(v_col1), ((uint16x4_t){24u, 23u, 22u, 21u}));
    v_v2 = vmlal_u16(v_v2, vget_high_u16(v_col1), ((uint16x4_t){20u, 19u, 18u, 17u}));
    v_v2 = vmlal_u16(v_v2, vget_low_u16(v_col2), ((uint16x4_t){16u, 15u, 14u, 13u}));
    v_v2 = vmlal_u16(v_v2, vget_high_u16(v_col2), ((uint16x4_t){12u, 11u, 10u, 9u}));
    v_v2 = vmlal_u16(v_v2, vget_low_u16(v_col3), ((uint16x4_t){8u, 7u, 6u, 5u}));
    v_v2 = vmlal_u16(v_v2, vget_high_u16(v_col3), ((uint16x4_t){4u, 3u, 2u, 1u}));
    v_sum1 = vpadd_u32(vget_low_u32(v_v1), vget_high_u32(v_v1));
    v_sum2 = vpadd_u32(vget_low_u32(v_v2), vget_high_u32(v_v2));
    v_sum12 = vpadd_u32(v_sum1, v_sum2);
    v_s1 += vget_lane_u32(v_sum12, 0u);
    v_s2 += vget_lane_u32(v_sum12, 1u);
    v_tail_index = (((uint64_t)(a_x.len)) & 18446744073709551584u);
    if (v_tail_index < ((uint64_t)(a_x.len))) {
      {
        wuffs_base__slice_u8 i_slice_p = wuffs_base__slice_u8__subslice_i(a_x, v_tail_index);
        v_p.ptr = i_slice_p.ptr;
        v_p.len = 1;
        const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
        while (v_p.ptr < i_end0_p) {
          v_s1 += ((uint32_t)(v_p.ptr[0u]));
          v_s2 += v_s1;
          v_p.ptr += 1;
        }
        v_p.len = 0;
      }
    }
    v_s1 %= 65521u;
    v_s2 %= 65521u;
    a_x = v_remaining;
  }
  self->private_impl.f_state = (((v_s2 & 65535u) << 16u) | (v_s1 & 65535u));
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
// ‼ WUFFS MULTI-FILE SECTION -arm_neon

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
// -------- func adler32.hasher.up_x86_sse42

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_adler32__hasher__up_x86_sse42(
    wuffs_adler32__hasher* self,
    wuffs_base__slice_u8 a_x) {
  uint32_t v_s1 = 0;
  uint32_t v_s2 = 0;
  wuffs_base__slice_u8 v_remaining = {0};
  wuffs_base__slice_u8 v_p = {0};
  __m128i v_zeroes = {0};
  __m128i v_ones = {0};
  __m128i v_weights__left = {0};
  __m128i v_weights_right = {0};
  __m128i v_q__left = {0};
  __m128i v_q_right = {0};
  __m128i v_v1 = {0};
  __m128i v_v2 = {0};
  __m128i v_v2j = {0};
  __m128i v_v2k = {0};
  uint32_t v_num_iterate_bytes = 0;
  uint64_t v_tail_index = 0;

  v_zeroes = _mm_set1_epi16((int16_t)(0u));
  v_ones = _mm_set1_epi16((int16_t)(1u));
  v_weights__left = _mm_set_epi8((int8_t)(17u), (int8_t)(18u), (int8_t)(19u), (int8_t)(20u), (int8_t)(21u), (int8_t)(22u), (int8_t)(23u), (int8_t)(24u), (int8_t)(25u), (int8_t)(26u), (int8_t)(27u), (int8_t)(28u), (int8_t)(29u), (int8_t)(30u), (int8_t)(31u), (int8_t)(32u));
  v_weights_right = _mm_set_epi8((int8_t)(1u), (int8_t)(2u), (int8_t)(3u), (int8_t)(4u), (int8_t)(5u), (int8_t)(6u), (int8_t)(7u), (int8_t)(8u), (int8_t)(9u), (int8_t)(10u), (int8_t)(11u), (int8_t)(12u), (int8_t)(13u), (int8_t)(14u), (int8_t)(15u), (int8_t)(16u));
  v_s1 = ((self->private_impl.f_state) & 0xFFFFu);
  v_s2 = ((self->private_impl.f_state) >> (32u - 16u));
  while (((uint64_t)(a_x.len)) > 0u) {
    v_remaining = wuffs_base__slice_u8__subslice_j(a_x, 0u);
    if (((uint64_t)(a_x.len)) > 5536u) {
      v_remaining = wuffs_base__slice_u8__subslice_i(a_x, 5536u);
      a_x = wuffs_base__slice_u8__subslice_j(a_x, 5536u);
    }
    v_num_iterate_bytes = ((uint32_t)((((uint64_t)(a_x.len)) & 4294967264u)));
    v_s2 += ((uint32_t)(v_s1 * v_num_iterate_bytes));
    v_v1 = _mm_setzero_si128();
    v_v2j = _mm_setzero_si128();
    v_v2k = _mm_setzero_si128();
    {
      wuffs_base__slice_u8 i_slice_p = a_x;
      v_p.ptr = i_slice_p.ptr;
      v_p.len = 32;
      const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 32) * 32));
      while (v_p.ptr < i_end0_p) {
        v_q__left = _mm_lddqu_si128((const __m128i*)(const void*)(v_p.ptr));
        v_q_right = _mm_lddqu_si128((const __m128i*)(const void*)(v_p.ptr + 16u));
        v_v2j = _mm_add_epi32(v_v2j, v_v1);
        v_v1 = _mm_add_epi32(v_v1, _mm_sad_epu8(v_q__left, v_zeroes));
        v_v1 = _mm_add_epi32(v_v1, _mm_sad_epu8(v_q_right, v_zeroes));
        v_v2k = _mm_add_epi32(v_v2k, _mm_madd_epi16(v_ones, _mm_maddubs_epi16(v_q__left, v_weights__left)));
        v_v2k = _mm_add_epi32(v_v2k, _mm_madd_epi16(v_ones, _mm_maddubs_epi16(v_q_right, v_weights_right)));
        v_p.ptr += 32;
      }
      v_p.len = 0;
    }
    v_v1 = _mm_add_epi32(v_v1, _mm_shuffle_epi32(v_v1, (int32_t)(177u)));
    v_v1 = _mm_add_epi32(v_v1, _mm_shuffle_epi32(v_v1, (int32_t)(78u)));
    v_s1 += ((uint32_t)(_mm_cvtsi128_si32(v_v1)));
    v_v2 = _mm_add_epi32(v_v2k, _mm_slli_epi32(v_v2j, (int32_t)(5u)));
    v_v2 = _mm_add_epi32(v_v2, _mm_shuffle_epi32(v_v2, (int32_t)(177u)));
    v_v2 = _mm_add_epi32(v_v2, _mm_shuffle_epi32(v_v2, (int32_t)(78u)));
    v_s2 += ((uint32_t)(_mm_cvtsi128_si32(v_v2)));
    v_tail_index = (((uint64_t)(a_x.len)) & 18446744073709551584u);
    if (v_tail_index < ((uint64_t)(a_x.len))) {
      {
        wuffs_base__slice_u8 i_slice_p = wuffs_base__slice_u8__subslice_i(a_x, v_tail_index);
        v_p.ptr = i_slice_p.ptr;
        v_p.len = 1;
        const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
        while (v_p.ptr < i_end0_p) {
          v_s1 += ((uint32_t)(v_p.ptr[0u]));
          v_s2 += v_s1;
          v_p.ptr += 1;
        }
        v_p.len = 0;
      }
    }
    v_s1 %= 65521u;
    v_s2 %= 65521u;
    a_x = v_remaining;
  }
  self->private_impl.f_state = (((v_s2 & 65535u) << 16u) | (v_s1 & 65535u));
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ADLER32)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BMP)

// ---------------- Status Codes Implementations

const char wuffs_bmp__error__bad_header[] = "#bmp: bad header";
const char wuffs_bmp__error__bad_rle_compression[] = "#bmp: bad RLE compression";
const char wuffs_bmp__error__truncated_input[] = "#bmp: truncated input";
const char wuffs_bmp__error__unsupported_bmp_file[] = "#bmp: unsupported BMP file";
const char wuffs_bmp__note__internal_note_short_read[] = "@bmp: internal note: short read";

// ---------------- Private Consts

#define WUFFS_BMP__COMPRESSION_NONE 0u

#define WUFFS_BMP__COMPRESSION_RLE8 1u

#define WUFFS_BMP__COMPRESSION_RLE4 2u

#define WUFFS_BMP__COMPRESSION_BITFIELDS 3u

#define WUFFS_BMP__COMPRESSION_JPEG 4u

#define WUFFS_BMP__COMPRESSION_PNG 5u

#define WUFFS_BMP__COMPRESSION_ALPHABITFIELDS 6u

#define WUFFS_BMP__COMPRESSION_LOW_BIT_DEPTH 256u

#define WUFFS_BMP__RLE_STATE_NEUTRAL 0u

#define WUFFS_BMP__RLE_STATE_RUN 1u

#define WUFFS_BMP__RLE_STATE_ESCAPE 2u

#define WUFFS_BMP__RLE_STATE_LITERAL 3u

#define WUFFS_BMP__RLE_STATE_DELTA_X 4u

#define WUFFS_BMP__RLE_STATE_DELTA_Y 5u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__do_decode_image_config(
    wuffs_bmp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__do_decode_frame_config(
    wuffs_bmp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__do_decode_frame(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__swizzle_none(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__swizzle_rle(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__swizzle_bitfields(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__swizzle_low_bit_depth(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__do_tell_me_more(
    wuffs_bmp__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__read_palette(
    wuffs_bmp__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__process_masks(
    wuffs_bmp__decoder* self);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_bmp__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_bmp__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_bmp__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_bmp__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_bmp__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_bmp__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_bmp__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_bmp__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_bmp__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_bmp__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_bmp__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_bmp__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_bmp__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_bmp__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_bmp__decoder__initialize(
    wuffs_bmp__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_bmp__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_bmp__decoder*
wuffs_bmp__decoder__alloc(void) {
  wuffs_bmp__decoder* x =
      (wuffs_bmp__decoder*)(calloc(1, sizeof(wuffs_bmp__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_bmp__decoder__initialize(
      x, sizeof(wuffs_bmp__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_bmp__decoder(void) {
  return sizeof(wuffs_bmp__decoder);
}

// ---------------- Function Implementations

// -------- func bmp.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_bmp__decoder__get_quirk(
    const wuffs_bmp__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func bmp.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__set_quirk(
    wuffs_bmp__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func bmp.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__decode_image_config(
    wuffs_bmp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_bmp__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_bmp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func bmp.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__do_decode_image_config(
    wuffs_bmp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_magic = 0;
  uint32_t v_width = 0;
  uint32_t v_height = 0;
  uint32_t v_planes = 0;
  uint32_t v_n = 0;
  uint32_t v_dst_pixfmt = 0;
  uint32_t v_byte_width = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if ((self->private_impl.f_call_sequence != 0u) || (self->private_impl.f_io_redirect_fourcc == 1u)) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    } else if (self->private_impl.f_io_redirect_fourcc != 0u) {
      status = wuffs_base__make_status(wuffs_base__note__i_o_redirect);
      goto ok;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_0 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 8) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_magic = t_0;
    }
    if (v_magic != 19778u) {
      status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
      goto exit;
    }
    self->private_data.s_do_decode_image_config.scratch = 8u;
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
    if (self->private_data.s_do_decode_image_config.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
      self->private_data.s_do_decode_image_config.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
      iop_a_src = io2_a_src;
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      goto suspend;
    }
    iop_a_src += self->private_data.s_do_decode_image_config.scratch;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      self->private_impl.f_padding = t_1;
    }
    if (self->private_impl.f_padding < 14u) {
      status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
      goto exit;
    }
    self->private_impl.f_padding -= 14u;
    self->private_impl.f_io_redirect_pos = wuffs_base__u64__sat_add(((uint64_t)(self->private_impl.f_padding)), wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src))));
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
      uint32_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_2 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
          if (num_bits_2 == 24) {
            t_2 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2)) << 56;
        }
      }
      self->private_impl.f_bitmap_info_len = t_2;
    }
    if (self->private_impl.f_padding < self->private_impl.f_bitmap_info_len) {
      status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
      goto exit;
    }
    self->private_impl.f_padding -= self->private_impl.f_bitmap_info_len;
    if (self->private_impl.f_bitmap_info_len == 12u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
        uint32_t t_3;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_3 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
          iop_a_src += 2;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_3 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_3;
            if (num_bits_3 == 8) {
              t_3 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_3 += 8u;
            *scratch |= ((uint64_t)(num_bits_3)) << 56;
          }
        }
        self->private_impl.f_width = t_3;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
        uint32_t t_4;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_4 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
          iop_a_src += 2;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_4 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4;
            if (num_bits_4 == 8) {
              t_4 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_4 += 8u;
            *scratch |= ((uint64_t)(num_bits_4)) << 56;
          }
        }
        self->private_impl.f_height = t_4;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
        uint32_t t_5;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_5 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
          iop_a_src += 2;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_5 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_5;
            if (num_bits_5 == 8) {
              t_5 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_5 += 8u;
            *scratch |= ((uint64_t)(num_bits_5)) << 56;
          }
        }
        v_planes = t_5;
      }
      if (v_planes != 1u) {
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
        uint32_t t_6;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_6 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
          iop_a_src += 2;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_6 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_6;
            if (num_bits_6 == 8) {
              t_6 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_6 += 8u;
            *scratch |= ((uint64_t)(num_bits_6)) << 56;
          }
        }
        self->private_impl.f_bits_per_pixel = t_6;
      }
    } else if (self->private_impl.f_bitmap_info_len == 16u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
        uint32_t t_7;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_7 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(17);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_7 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_7;
            if (num_bits_7 == 24) {
              t_7 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_7 += 8u;
            *scratch |= ((uint64_t)(num_bits_7)) << 56;
          }
        }
        v_width = t_7;
      }
      if (v_width > 2147483647u) {
        status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
        goto exit;
      } else if (v_width > 16777215u) {
        status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
        goto exit;
      }
      self->private_impl.f_width = v_width;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(18);
        uint32_t t_8;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_8 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(19);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_8 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_8;
            if (num_bits_8 == 24) {
              t_8 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_8 += 8u;
            *scratch |= ((uint64_t)(num_bits_8)) << 56;
          }
        }
        v_height = t_8;
      }
      if (v_height > 2147483647u) {
        status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
        goto exit;
      } else if (v_height > 16777215u) {
        status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
        goto exit;
      }
      self->private_impl.f_height = v_height;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(20);
        uint32_t t_9;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_9 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
          iop_a_src += 2;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(21);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_9 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_9;
            if (num_bits_9 == 8) {
              t_9 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_9 += 8u;
            *scratch |= ((uint64_t)(num_bits_9)) << 56;
          }
        }
        v_planes = t_9;
      }
      if (v_planes != 1u) {
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(22);
        uint32_t t_10;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_10 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
          iop_a_src += 2;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(23);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_10 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_10;
            if (num_bits_10 == 8) {
              t_10 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_10 += 8u;
            *scratch |= ((uint64_t)(num_bits_10)) << 56;
          }
        }
        self->private_impl.f_bits_per_pixel = t_10;
      }
    } else {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(24);
        uint32_t t_11;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_11 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(25);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_11 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_11;
            if (num_bits_11 == 24) {
              t_11 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_11 += 8u;
            *scratch |= ((uint64_t)(num_bits_11)) << 56;
          }
        }
        v_width = t_11;
      }
      if (v_width > 2147483647u) {
        status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
        goto exit;
      } else if (v_width > 16777215u) {
        status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
        goto exit;
      }
      self->private_impl.f_width = v_width;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(26);
        uint32_t t_12;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_12 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(27);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_12 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_12;
            if (num_bits_12 == 24) {
              t_12 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_12 += 8u;
            *scratch |= ((uint64_t)(num_bits_12)) << 56;
          }
        }
        v_height = t_12;
      }
      if (v_height == 2147483648u) {
        status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
        goto exit;
      } else if (v_height > 2147483648u) {
        v_height = ((uint32_t)(0u - v_height));
        if (v_height > 16777215u) {
          status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
          goto exit;
        }
        self->private_impl.f_height = v_height;
        self->private_impl.f_top_down = true;
      } else if (v_height > 16777215u) {
        status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
        goto exit;
      } else {
        self->private_impl.f_height = v_height;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(28);
        uint32_t t_13;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_13 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
          iop_a_src += 2;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(29);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_13 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_13;
            if (num_bits_13 == 8) {
              t_13 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_13 += 8u;
            *scratch |= ((uint64_t)(num_bits_13)) << 56;
          }
        }
        v_planes = t_13;
      }
      if (v_planes != 1u) {
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(30);
        uint32_t t_14;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_14 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
          iop_a_src += 2;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(31);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_14 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_14;
            if (num_bits_14 == 8) {
              t_14 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_14 += 8u;
            *scratch |= ((uint64_t)(num_bits_14)) << 56;
          }
        }
        self->private_impl.f_bits_per_pixel = t_14;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(32);
        uint32_t t_15;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_15 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(33);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_15 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_15;
            if (num_bits_15 == 24) {
              t_15 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_15 += 8u;
            *scratch |= ((uint64_t)(num_bits_15)) << 56;
          }
        }
        self->private_impl.f_compression = t_15;
      }
      if (self->private_impl.f_bits_per_pixel == 0u) {
        if (self->private_impl.f_compression == 4u) {
          self->private_impl.f_io_redirect_fourcc = 1246774599u;
          status = wuffs_base__make_status(wuffs_base__note__i_o_redirect);
          goto ok;
        } else if (self->private_impl.f_compression == 5u) {
          self->private_impl.f_io_redirect_fourcc = 1347307296u;
          status = wuffs_base__make_status(wuffs_base__note__i_o_redirect);
          goto ok;
        }
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
      self->private_data.s_do_decode_image_config.scratch = 20u;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(34);
      if (self->private_data.s_do_decode_image_config.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_do_decode_image_config.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_do_decode_image_config.scratch;
      if (self->private_impl.f_bitmap_info_len == 40u) {
        if (self->private_impl.f_bits_per_pixel >= 16u) {
          if (self->private_impl.f_padding >= 16u) {
            self->private_impl.f_bitmap_info_len = 56u;
            self->private_impl.f_padding -= 16u;
          } else if (self->private_impl.f_padding >= 12u) {
            self->private_impl.f_bitmap_info_len = 52u;
            self->private_impl.f_padding -= 12u;
          }
        }
      } else if ((self->private_impl.f_bitmap_info_len != 52u) &&
          (self->private_impl.f_bitmap_info_len != 56u) &&
          (self->private_impl.f_bitmap_info_len != 64u) &&
          (self->private_impl.f_bitmap_info_len != 108u) &&
          (self->private_impl.f_bitmap_info_len != 124u)) {
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
      if (self->private_impl.f_compression == 6u) {
        self->private_impl.f_compression = 3u;
      }
      if (self->private_impl.f_compression == 3u) {
        if (self->private_impl.f_bitmap_info_len >= 52u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(35);
            uint32_t t_16;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_16 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_do_decode_image_config.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(36);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
                uint32_t num_bits_16 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_16;
                if (num_bits_16 == 24) {
                  t_16 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_16 += 8u;
                *scratch |= ((uint64_t)(num_bits_16)) << 56;
              }
            }
            self->private_impl.f_channel_masks[2u] = t_16;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(37);
            uint32_t t_17;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_17 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_do_decode_image_config.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(38);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
                uint32_t num_bits_17 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_17;
                if (num_bits_17 == 24) {
                  t_17 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_17 += 8u;
                *scratch |= ((uint64_t)(num_bits_17)) << 56;
              }
            }
            self->private_impl.f_channel_masks[1u] = t_17;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(39);
            uint32_t t_18;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_18 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_do_decode_image_config.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(40);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
                uint32_t num_bits_18 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_18;
                if (num_bits_18 == 24) {
                  t_18 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_18 += 8u;
                *scratch |= ((uint64_t)(num_bits_18)) << 56;
              }
            }
            self->private_impl.f_channel_masks[0u] = t_18;
          }
          if (self->private_impl.f_bitmap_info_len >= 56u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(41);
              uint32_t t_19;
              if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
                t_19 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
                iop_a_src += 4;
              } else {
                self->private_data.s_do_decode_image_config.scratch = 0;
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(42);
                while (true) {
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
                  uint32_t num_bits_19 = ((uint32_t)(*scratch >> 56));
                  *scratch <<= 8;
                  *scratch >>= 8;
                  *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_19;
                  if (num_bits_19 == 24) {
                    t_19 = ((uint32_t)(*scratch));
                    break;
                  }
                  num_bits_19 += 8u;
                  *scratch |= ((uint64_t)(num_bits_19)) << 56;
                }
              }
              self->private_impl.f_channel_masks[3u] = t_19;
            }
            self->private_data.s_do_decode_image_config.scratch = ((uint32_t)(self->private_impl.f_bitmap_info_len - 56u));
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(43);
            if (self->private_data.s_do_decode_image_config.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
              self->private_data.s_do_decode_image_config.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
              iop_a_src = io2_a_src;
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            iop_a_src += self->private_data.s_do_decode_image_config.scratch;
          }
          if ((self->private_impl.f_channel_masks[0u] == 255u) && (self->private_impl.f_channel_masks[1u] == 65280u) && (self->private_impl.f_channel_masks[2u] == 16711680u)) {
            if (self->private_impl.f_bits_per_pixel == 24u) {
              self->private_impl.f_compression = 0u;
            } else if (self->private_impl.f_bits_per_pixel == 32u) {
              if ((self->private_impl.f_channel_masks[3u] == 0u) || (self->private_impl.f_channel_masks[3u] == 4278190080u)) {
                self->private_impl.f_compression = 0u;
              }
            }
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(44);
          status = wuffs_bmp__decoder__process_masks(self);
          if (status.repr) {
            goto suspend;
          }
        }
      } else if (self->private_impl.f_bitmap_info_len >= 40u) {
        v_n = (self->private_impl.f_bitmap_info_len - 40u);
        self->private_data.s_do_decode_image_config.scratch = v_n;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(45);
        if (self->private_data.s_do_decode_image_config.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
          self->private_data.s_do_decode_image_config.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
          iop_a_src = io2_a_src;
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        iop_a_src += self->private_data.s_do_decode_image_config.scratch;
      } else {
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
    }
    if (self->private_impl.f_compression != 3u) {
      if (self->private_impl.f_bits_per_pixel < 16u) {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(46);
        status = wuffs_bmp__decoder__read_palette(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
      }
    }
    if (self->private_impl.f_compression == 0u) {
      if ((self->private_impl.f_bits_per_pixel == 1u) || (self->private_impl.f_bits_per_pixel == 2u) || (self->private_impl.f_bits_per_pixel == 4u)) {
        self->private_impl.f_src_pixfmt = 2198077448u;
        self->private_impl.f_compression = 256u;
      } else if (self->private_impl.f_bits_per_pixel == 8u) {
        self->private_impl.f_src_pixfmt = 2198077448u;
      } else if (self->private_impl.f_bits_per_pixel == 16u) {
        self->private_impl.f_compression = 3u;
        self->private_impl.f_channel_masks[0u] = 31u;
        self->private_impl.f_channel_masks[1u] = 992u;
        self->private_impl.f_channel_masks[2u] = 31744u;
        self->private_impl.f_channel_masks[3u] = 0u;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(47);
        status = wuffs_bmp__decoder__process_masks(self);
        if (status.repr) {
          goto suspend;
        }
        self->private_impl.f_src_pixfmt = 2164308923u;
      } else if (self->private_impl.f_bits_per_pixel == 24u) {
        self->private_impl.f_src_pixfmt = 2147485832u;
      } else if (self->private_impl.f_bits_per_pixel == 32u) {
        if (self->private_impl.f_channel_masks[3u] == 0u) {
          self->private_impl.f_src_pixfmt = 2415954056u;
        } else {
          self->private_impl.f_src_pixfmt = 2164295816u;
        }
      } else {
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
    } else if (self->private_impl.f_compression == 1u) {
      if (self->private_impl.f_bits_per_pixel == 8u) {
        self->private_impl.f_src_pixfmt = 2198077448u;
      } else {
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
    } else if (self->private_impl.f_compression == 2u) {
      if (self->private_impl.f_bits_per_pixel == 4u) {
        self->private_impl.f_src_pixfmt = 2198077448u;
      } else {
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
    } else if (self->private_impl.f_compression == 3u) {
      if ((self->private_impl.f_bits_per_pixel == 16u) || (self->private_impl.f_bits_per_pixel == 32u)) {
        self->private_impl.f_src_pixfmt = 2164308923u;
      } else {
        status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
        goto exit;
      }
    } else {
      status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
      goto exit;
    }
    if (((self->private_impl.f_bitmap_info_len < 40u) || (self->private_impl.f_bitmap_info_len == 64u)) &&
        (self->private_impl.f_bits_per_pixel != 1u) &&
        (self->private_impl.f_bits_per_pixel != 4u) &&
        (self->private_impl.f_bits_per_pixel != 8u) &&
        (self->private_impl.f_bits_per_pixel != 24u)) {
      status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
      goto exit;
    }
    if (self->private_impl.f_bits_per_pixel == 1u) {
      v_byte_width = ((self->private_impl.f_width >> 3u) + (((self->private_impl.f_width & 7u) + 7u) >> 3u));
      self->private_impl.f_pad_per_row = ((4u - (v_byte_width & 3u)) & 3u);
    } else if (self->private_impl.f_bits_per_pixel == 2u) {
      v_byte_width = ((self->private_impl.f_width >> 2u) + (((self->private_impl.f_width & 3u) + 3u) >> 2u));
      self->private_impl.f_pad_per_row = ((4u - (v_byte_width & 3u)) & 3u);
    } else if (self->private_impl.f_bits_per_pixel == 4u) {
      v_byte_width = ((self->private_impl.f_width >> 1u) + (self->private_impl.f_width & 1u));
      self->private_impl.f_pad_per_row = ((4u - (v_byte_width & 3u)) & 3u);
    } else if (self->private_impl.f_bits_per_pixel == 8u) {
      self->private_impl.f_pad_per_row = ((4u - (self->private_impl.f_width & 3u)) & 3u);
    } else if (self->private_impl.f_bits_per_pixel == 16u) {
      self->private_impl.f_pad_per_row = ((self->private_impl.f_width & 1u) * 2u);
    } else if (self->private_impl.f_bits_per_pixel == 24u) {
      self->private_impl.f_pad_per_row = (self->private_impl.f_width & 3u);
    } else if (self->private_impl.f_bits_per_pixel == 32u) {
      self->private_impl.f_pad_per_row = 0u;
    }
    self->private_impl.f_frame_config_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
    if (a_dst != NULL) {
      v_dst_pixfmt = 2164295816u;
      if ((self->private_impl.f_channel_num_bits[0u] > 8u) ||
          (self->private_impl.f_channel_num_bits[1u] > 8u) ||
          (self->private_impl.f_channel_num_bits[2u] > 8u) ||
          (self->private_impl.f_channel_num_bits[3u] > 8u)) {
        v_dst_pixfmt = 2164308923u;
      } else if (((self->private_impl.f_src_pixfmt == 2198077448u) || (self->private_impl.f_src_pixfmt == 2147485832u) || (self->private_impl.f_src_pixfmt == 2415954056u)) || ((self->private_impl.f_src_pixfmt == 2164308923u) && (self->private_impl.f_channel_masks[3u] == 0u))) {
        v_dst_pixfmt = 2415954056u;
      }
      wuffs_base__image_config__set(
          a_dst,
          v_dst_pixfmt,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          self->private_impl.f_frame_config_io_position,
          (self->private_impl.f_channel_masks[3u] == 0u));
    }
    self->private_impl.f_call_sequence = 32u;

    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bmp.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__decode_frame_config(
    wuffs_bmp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_bmp__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_bmp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func bmp.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__do_decode_frame_config(
    wuffs_bmp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_bmp__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (self->private_impl.f_frame_config_io_position != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          self->private_impl.f_frame_config_io_position,
          0u,
          true,
          false,
          4278190080u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bmp.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__decode_frame(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_bmp__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_bmp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func bmp.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__do_decode_frame(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_bmp__decoder__do_decode_frame_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    self->private_data.s_do_decode_frame.scratch = self->private_impl.f_padding;
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
    if (self->private_data.s_do_decode_frame.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
      self->private_data.s_do_decode_frame.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
      iop_a_src = io2_a_src;
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      goto suspend;
    }
    iop_a_src += self->private_data.s_do_decode_frame.scratch;
    if ((self->private_impl.f_width > 0u) && (self->private_impl.f_height > 0u)) {
      self->private_impl.f_dst_x = 0u;
      if (self->private_impl.f_top_down) {
        self->private_impl.f_dst_y = 0u;
        self->private_impl.f_dst_y_inc = 1u;
      } else {
        self->private_impl.f_dst_y = ((uint32_t)(self->private_impl.f_height - 1u));
        self->private_impl.f_dst_y_inc = 4294967295u;
      }
      v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
          wuffs_base__pixel_buffer__pixel_format(a_dst),
          wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8_ij(self->private_data.f_scratch, 1024, 2048)),
          wuffs_base__utility__make_pixel_format(self->private_impl.f_src_pixfmt),
          wuffs_base__make_slice_u8(self->private_data.f_src_palette, 1024),
          a_blend);
      if ( ! wuffs_base__status__is_ok(&v_status)) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      }
      while (true) {
        if (self->private_impl.f_compression == 0u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          v_status = wuffs_bmp__decoder__swizzle_none(self, a_dst, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        } else if (self->private_impl.f_compression < 3u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          v_status = wuffs_bmp__decoder__swizzle_rle(self, a_dst, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        } else if (self->private_impl.f_compression == 3u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          v_status = wuffs_bmp__decoder__swizzle_bitfields(self, a_dst, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        } else {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          v_status = wuffs_bmp__decoder__swizzle_low_bit_depth(self, a_dst, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        if (wuffs_base__status__is_ok(&v_status)) {
          break;
        } else if (v_status.repr != wuffs_bmp__note__internal_note_short_read) {
          status = v_status;
          if (wuffs_base__status__is_error(&status)) {
            goto exit;
          } else if (wuffs_base__status__is_suspension(&status)) {
            status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
            goto exit;
          }
          goto ok;
        }
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
      }
      self->private_data.s_do_decode_frame.scratch = self->private_impl.f_pending_pad;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      if (self->private_data.s_do_decode_frame.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_do_decode_frame.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_do_decode_frame.scratch;
      self->private_impl.f_pending_pad = 0u;
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bmp.decoder.swizzle_none

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__swizzle_none(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  uint32_t v_src_bytes_per_pixel = 0;
  wuffs_base__slice_u8 v_dst_palette = {0};
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint64_t v_i = 0;
  uint64_t v_j = 0;
  uint64_t v_n = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    status = wuffs_base__make_status(wuffs_base__error__unsupported_option);
    goto exit;
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_dst_palette = wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8_ij(self->private_data.f_scratch, 1024, 2048));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  label__outer__continue:;
  while (true) {
    while (self->private_impl.f_pending_pad > 0u) {
      if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
        status = wuffs_base__make_status(wuffs_bmp__note__internal_note_short_read);
        goto ok;
      }
      self->private_impl.f_pending_pad -= 1u;
      iop_a_src += 1u;
    }
    while (true) {
      if (self->private_impl.f_dst_x == self->private_impl.f_width) {
        self->private_impl.f_dst_x = 0u;
        self->private_impl.f_dst_y += self->private_impl.f_dst_y_inc;
        if (self->private_impl.f_dst_y >= self->private_impl.f_height) {
          if (self->private_impl.f_height > 0u) {
            self->private_impl.f_pending_pad = self->private_impl.f_pad_per_row;
          }
          goto label__outer__break;
        } else if (self->private_impl.f_pad_per_row != 0u) {
          self->private_impl.f_pending_pad = self->private_impl.f_pad_per_row;
          goto label__outer__continue;
        }
      }
      v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
      if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
        v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
      }
      v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_dst_bytes_per_pixel)));
      if (v_i >= ((uint64_t)(v_dst.len))) {
        if (self->private_impl.f_bits_per_pixel > 32u) {
          status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
          goto exit;
        }
        v_src_bytes_per_pixel = (self->private_impl.f_bits_per_pixel / 8u);
        if (v_src_bytes_per_pixel == 0u) {
          status = wuffs_base__make_status(wuffs_bmp__error__unsupported_bmp_file);
          goto exit;
        }
        v_n = (((uint64_t)(io2_a_src - iop_a_src)) / ((uint64_t)(v_src_bytes_per_pixel)));
        v_n = wuffs_base__u64__min(v_n, ((uint64_t)(((uint32_t)(self->private_impl.f_width - self->private_impl.f_dst_x)))));
        v_j = v_n;
        while (v_j >= 8u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) >= ((uint64_t)((v_src_bytes_per_pixel * 8u)))) {
            iop_a_src += (v_src_bytes_per_pixel * 8u);
          }
          v_j -= 8u;
        }
        while (v_j > 0u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) >= ((uint64_t)((v_src_bytes_per_pixel * 1u)))) {
            iop_a_src += (v_src_bytes_per_pixel * 1u);
          }
          v_j -= 1u;
        }
      } else {
        v_n = wuffs_base__pixel_swizzler__swizzle_interleaved_from_reader(
            &self->private_impl.f_swizzler,
            wuffs_base__slice_u8__subslice_i(v_dst, v_i),
            v_dst_palette,
            &iop_a_src,
            io2_a_src);
      }
      if (v_n == 0u) {
        status = wuffs_base__make_status(wuffs_bmp__note__internal_note_short_read);
        goto ok;
      }
      wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, ((uint32_t)(v_n)));
    }
  }
  label__outer__break:;
  status = wuffs_base__make_status(NULL);
  goto ok;

  ok:
  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bmp.decoder.swizzle_rle

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__swizzle_rle(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  wuffs_base__slice_u8 v_dst_palette = {0};
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_row = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint64_t v_i = 0;
  uint64_t v_n = 0;
  uint32_t v_p0 = 0;
  uint8_t v_code = 0;
  uint8_t v_indexes[2] = {0};
  uint32_t v_rle_state = 0;
  uint32_t v_chunk_bits = 0;
  uint32_t v_chunk_count = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    status = wuffs_base__make_status(wuffs_base__error__unsupported_option);
    goto exit;
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_dst_palette = wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8_ij(self->private_data.f_scratch, 1024, 2048));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  v_rle_state = self->private_impl.f_rle_state;
  label__outer__continue:;
  while (true) {
    v_row = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
    if (v_dst_bytes_per_row < ((uint64_t)(v_row.len))) {
      v_row = wuffs_base__slice_u8__subslice_j(v_row, v_dst_bytes_per_row);
    }
    label__middle__continue:;
    while (true) {
      v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_dst_bytes_per_pixel)));
      if (v_i <= ((uint64_t)(v_row.len))) {
        v_dst = wuffs_base__slice_u8__subslice_i(v_row, v_i);
      } else {
        v_dst = wuffs_base__utility__empty_slice_u8();
      }
      while (true) {
        if (v_rle_state == 0u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) < 1u) {
            break;
          }
          v_code = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          if (v_code == 0u) {
            v_rle_state = 2u;
            continue;
          }
          self->private_impl.f_rle_length = ((uint32_t)(v_code));
          v_rle_state = 1u;
          continue;
        } else if (v_rle_state == 1u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) < 1u) {
            break;
          }
          v_code = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          if (self->private_impl.f_bits_per_pixel == 8u) {
            v_p0 = 0u;
            while (v_p0 < self->private_impl.f_rle_length) {
              self->private_data.f_scratch[v_p0] = v_code;
              v_p0 += 1u;
            }
          } else {
            v_indexes[0u] = ((uint8_t)(((uint8_t)(v_code >> 4u))));
            v_indexes[1u] = ((uint8_t)(v_code & 15u));
            v_p0 = 0u;
            while (v_p0 < self->private_impl.f_rle_length) {
              self->private_data.f_scratch[(v_p0 + 0u)] = v_indexes[0u];
              self->private_data.f_scratch[(v_p0 + 1u)] = v_indexes[1u];
              v_p0 += 2u;
            }
          }
          wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, v_dst_palette, wuffs_base__make_slice_u8(self->private_data.f_scratch, self->private_impl.f_rle_length));
          wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, self->private_impl.f_rle_length);
          v_rle_state = 0u;
          goto label__middle__continue;
        } else if (v_rle_state == 2u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) < 1u) {
            break;
          }
          v_code = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          if (v_code < 2u) {
            if ((self->private_impl.f_dst_y >= self->private_impl.f_height) && (v_code == 0u)) {
              status = wuffs_base__make_status(wuffs_bmp__error__bad_rle_compression);
              goto exit;
            }
            wuffs_base__pixel_swizzler__swizzle_interleaved_transparent_black(&self->private_impl.f_swizzler, v_dst, v_dst_palette, 18446744073709551615u);
            self->private_impl.f_dst_x = 0u;
            self->private_impl.f_dst_y += self->private_impl.f_dst_y_inc;
            if (v_code > 0u) {
              goto label__outer__break;
            }
            v_rle_state = 0u;
            goto label__outer__continue;
          } else if (v_code == 2u) {
            v_rle_state = 4u;
            continue;
          }
          self->private_impl.f_rle_length = ((uint32_t)(v_code));
          self->private_impl.f_rle_padded = ((self->private_impl.f_bits_per_pixel == 8u) && (((uint8_t)(v_code & 1u)) != 0u));
          v_rle_state = 3u;
          continue;
        } else if (v_rle_state == 3u) {
          if (self->private_impl.f_bits_per_pixel == 8u) {
            v_n = wuffs_base__pixel_swizzler__limited_swizzle_u32_interleaved_from_reader(
                &self->private_impl.f_swizzler,
                self->private_impl.f_rle_length,
                v_dst,
                v_dst_palette,
                &iop_a_src,
                io2_a_src);
            wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, ((uint32_t)(v_n)));
            wuffs_private_impl__u32__sat_sub_indirect(&self->private_impl.f_rle_length, ((uint32_t)(v_n)));
          } else {
            v_chunk_count = ((self->private_impl.f_rle_length + 3u) / 4u);
            v_p0 = 0u;
            while ((v_chunk_count > 0u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 2u)) {
              v_chunk_bits = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
              iop_a_src += 2u;
              self->private_data.f_scratch[(v_p0 + 0u)] = ((uint8_t)((15u & (v_chunk_bits >> 12u))));
              self->private_data.f_scratch[(v_p0 + 1u)] = ((uint8_t)((15u & (v_chunk_bits >> 8u))));
              self->private_data.f_scratch[(v_p0 + 2u)] = ((uint8_t)((15u & (v_chunk_bits >> 4u))));
              self->private_data.f_scratch[(v_p0 + 3u)] = ((uint8_t)((15u & (v_chunk_bits >> 0u))));
              v_p0 = ((v_p0 & 255u) + 4u);
              v_chunk_count -= 1u;
            }
            v_p0 = wuffs_base__u32__min(v_p0, self->private_impl.f_rle_length);
            wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, v_dst_palette, wuffs_base__make_slice_u8(self->private_data.f_scratch, v_p0));
            wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, v_p0);
            wuffs_private_impl__u32__sat_sub_indirect(&self->private_impl.f_rle_length, v_p0);
          }
          if (self->private_impl.f_rle_length > 0u) {
            break;
          }
          if (self->private_impl.f_rle_padded) {
            if (((uint64_t)(io2_a_src - iop_a_src)) < 1u) {
              break;
            }
            iop_a_src += 1u;
            self->private_impl.f_rle_padded = false;
          }
          v_rle_state = 0u;
          goto label__middle__continue;
        } else if (v_rle_state == 4u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) < 1u) {
            break;
          }
          self->private_impl.f_rle_delta_x = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          v_rle_state = 5u;
          continue;
        }
        if (((uint64_t)(io2_a_src - iop_a_src)) < 1u) {
          break;
        }
        v_code = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
        iop_a_src += 1u;
        if (self->private_impl.f_rle_delta_x > 0u) {
          wuffs_base__pixel_swizzler__swizzle_interleaved_transparent_black(&self->private_impl.f_swizzler, v_dst, v_dst_palette, ((uint64_t)(self->private_impl.f_rle_delta_x)));
          wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, ((uint32_t)(self->private_impl.f_rle_delta_x)));
          self->private_impl.f_rle_delta_x = 0u;
          if (self->private_impl.f_dst_x > self->private_impl.f_width) {
            status = wuffs_base__make_status(wuffs_bmp__error__bad_rle_compression);
            goto exit;
          }
        }
        if (v_code > 0u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          v_code -= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
          while (true) {
            self->private_impl.f_dst_y += self->private_impl.f_dst_y_inc;
            if (self->private_impl.f_dst_y >= self->private_impl.f_height) {
              status = wuffs_base__make_status(wuffs_bmp__error__bad_rle_compression);
              goto exit;
            }
            v_row = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
            if (v_dst_bytes_per_row < ((uint64_t)(v_row.len))) {
              v_row = wuffs_base__slice_u8__subslice_j(v_row, v_dst_bytes_per_row);
            }
            if (v_code <= 0u) {
              wuffs_base__pixel_swizzler__swizzle_interleaved_transparent_black(&self->private_impl.f_swizzler, v_row, v_dst_palette, ((uint64_t)(self->private_impl.f_dst_x)));
              break;
            }
            wuffs_base__pixel_swizzler__swizzle_interleaved_transparent_black(&self->private_impl.f_swizzler, v_row, v_dst_palette, 18446744073709551615u);
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
            v_code -= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
          }
        }
        v_rle_state = 0u;
        goto label__middle__continue;
      }
      self->private_impl.f_rle_state = v_rle_state;
      status = wuffs_base__make_status(wuffs_bmp__note__internal_note_short_read);
      goto ok;
    }
  }
  label__outer__break:;
  while (self->private_impl.f_dst_y < self->private_impl.f_height) {
    v_row = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
    if (v_dst_bytes_per_row < ((uint64_t)(v_row.len))) {
      v_row = wuffs_base__slice_u8__subslice_j(v_row, v_dst_bytes_per_row);
    }
    wuffs_base__pixel_swizzler__swizzle_interleaved_transparent_black(&self->private_impl.f_swizzler, v_row, v_dst_palette, 18446744073709551615u);
    self->private_impl.f_dst_y += self->private_impl.f_dst_y_inc;
  }
  status = wuffs_base__make_status(NULL);
  goto ok;

  ok:
  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bmp.decoder.swizzle_bitfields

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__swizzle_bitfields(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  wuffs_base__slice_u8 v_dst_palette = {0};
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint64_t v_i = 0;
  uint64_t v_n = 0;
  uint32_t v_p0 = 0;
  uint32_t v_p1 = 0;
  uint32_t v_p1_temp = 0;
  uint32_t v_num_bits = 0;
  uint32_t v_c = 0;
  uint32_t v_c32 = 0;
  uint32_t v_channel = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    status = wuffs_base__make_status(wuffs_base__error__unsupported_option);
    goto exit;
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_dst_palette = wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8_ij(self->private_data.f_scratch, 1024, 2048));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  label__outer__continue:;
  while (true) {
    while (self->private_impl.f_pending_pad > 0u) {
      if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
        status = wuffs_base__make_status(wuffs_bmp__note__internal_note_short_read);
        goto ok;
      }
      self->private_impl.f_pending_pad -= 1u;
      iop_a_src += 1u;
    }
    while (true) {
      if (self->private_impl.f_dst_x == self->private_impl.f_width) {
        self->private_impl.f_dst_x = 0u;
        self->private_impl.f_dst_y += self->private_impl.f_dst_y_inc;
        if (self->private_impl.f_dst_y >= self->private_impl.f_height) {
          if (self->private_impl.f_height > 0u) {
            self->private_impl.f_pending_pad = self->private_impl.f_pad_per_row;
          }
          goto label__outer__break;
        } else if (self->private_impl.f_pad_per_row != 0u) {
          self->private_impl.f_pending_pad = self->private_impl.f_pad_per_row;
          goto label__outer__continue;
        }
      }
      v_p1_temp = ((uint32_t)(self->private_impl.f_width - self->private_impl.f_dst_x));
      v_p1 = wuffs_base__u32__min(v_p1_temp, 256u);
      v_p0 = 0u;
      while (v_p0 < v_p1) {
        if (self->private_impl.f_bits_per_pixel == 16u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) < 2u) {
            break;
          }
          v_c32 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
          iop_a_src += 2u;
        } else {
          if (((uint64_t)(io2_a_src - iop_a_src)) < 4u) {
            break;
          }
          v_c32 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
          iop_a_src += 4u;
        }
        v_channel = 0u;
        while (v_channel < 4u) {
          if (self->private_impl.f_channel_num_bits[v_channel] == 0u) {
            self->private_data.f_scratch[((8u * v_p0) + (2u * v_channel) + 0u)] = 255u;
            self->private_data.f_scratch[((8u * v_p0) + (2u * v_channel) + 1u)] = 255u;
          } else {
            v_c = ((v_c32 & self->private_impl.f_channel_masks[v_channel]) >> self->private_impl.f_channel_shifts[v_channel]);
            v_num_bits = ((uint32_t)(self->private_impl.f_channel_num_bits[v_channel]));
            while (v_num_bits < 16u) {
              v_c |= ((uint32_t)(v_c << v_num_bits));
              v_num_bits *= 2u;
            }
            v_c >>= (v_num_bits - 16u);
            self->private_data.f_scratch[((8u * v_p0) + (2u * v_channel) + 0u)] = ((uint8_t)((v_c >> 0u)));
            self->private_data.f_scratch[((8u * v_p0) + (2u * v_channel) + 1u)] = ((uint8_t)((v_c >> 8u)));
          }
          v_channel += 1u;
        }
        v_p0 += 1u;
      }
      v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
      if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
        v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
      }
      v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_dst_bytes_per_pixel)));
      if (v_i >= ((uint64_t)(v_dst.len))) {
        v_n = ((uint64_t)(v_p0));
      } else {
        v_n = wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), v_dst_palette, wuffs_base__make_slice_u8(self->private_data.f_scratch, (8u * v_p0)));
      }
      if (v_n == 0u) {
        status = wuffs_base__make_status(wuffs_bmp__note__internal_note_short_read);
        goto ok;
      }
      wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, ((uint32_t)(v_n)));
    }
  }
  label__outer__break:;
  status = wuffs_base__make_status(NULL);
  goto ok;

  ok:
  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bmp.decoder.swizzle_low_bit_depth

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__swizzle_low_bit_depth(
    wuffs_bmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  wuffs_base__slice_u8 v_dst_palette = {0};
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint64_t v_i = 0;
  uint64_t v_n = 0;
  uint32_t v_p0 = 0;
  uint32_t v_chunk_bits = 0;
  uint32_t v_chunk_count = 0;
  uint32_t v_pixels_per_chunk = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    status = wuffs_base__make_status(wuffs_base__error__unsupported_option);
    goto exit;
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_dst_palette = wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8_ij(self->private_data.f_scratch, 1024, 2048));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  while (true) {
    if (self->private_impl.f_dst_x == self->private_impl.f_width) {
      self->private_impl.f_dst_x = 0u;
      self->private_impl.f_dst_y += self->private_impl.f_dst_y_inc;
      if (self->private_impl.f_dst_y >= self->private_impl.f_height) {
        break;
      }
    }
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
    if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
    }
    v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_dst_bytes_per_pixel)));
    if (v_i >= ((uint64_t)(v_dst.len))) {
      if (self->private_impl.f_bits_per_pixel == 1u) {
        v_chunk_count = ((wuffs_base__u32__sat_sub(self->private_impl.f_width, self->private_impl.f_dst_x) + 31u) / 32u);
        v_pixels_per_chunk = 32u;
      } else if (self->private_impl.f_bits_per_pixel == 2u) {
        v_chunk_count = ((wuffs_base__u32__sat_sub(self->private_impl.f_width, self->private_impl.f_dst_x) + 15u) / 16u);
        v_pixels_per_chunk = 16u;
      } else {
        v_chunk_count = ((wuffs_base__u32__sat_sub(self->private_impl.f_width, self->private_impl.f_dst_x) + 7u) / 8u);
        v_pixels_per_chunk = 8u;
      }
      while ((v_chunk_count >= 64u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 256u)) {
        iop_a_src += 256u;
        self->private_impl.f_dst_x = wuffs_base__u32__min(self->private_impl.f_width, ((uint32_t)(self->private_impl.f_dst_x + (v_pixels_per_chunk * 64u))));
        v_chunk_count -= 64u;
      }
      while ((v_chunk_count >= 8u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 32u)) {
        iop_a_src += 32u;
        self->private_impl.f_dst_x = wuffs_base__u32__min(self->private_impl.f_width, ((uint32_t)(self->private_impl.f_dst_x + (v_pixels_per_chunk * 8u))));
        v_chunk_count -= 8u;
      }
      while (v_chunk_count > 0u) {
        if (((uint64_t)(io2_a_src - iop_a_src)) < 4u) {
          status = wuffs_base__make_status(wuffs_bmp__note__internal_note_short_read);
          goto ok;
        }
        iop_a_src += 4u;
        self->private_impl.f_dst_x = wuffs_base__u32__min(self->private_impl.f_width, ((uint32_t)(self->private_impl.f_dst_x + (v_pixels_per_chunk * 1u))));
        v_chunk_count -= 1u;
      }
      continue;
    }
    v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_i);
    v_p0 = 0u;
    if (self->private_impl.f_bits_per_pixel == 1u) {
      v_chunk_count = ((wuffs_base__u32__sat_sub(self->private_impl.f_width, self->private_impl.f_dst_x) + 31u) / 32u);
      v_chunk_count = wuffs_base__u32__min(v_chunk_count, 16u);
      while ((v_chunk_count > 0u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 4u)) {
        v_chunk_bits = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4u;
        self->private_data.f_scratch[(v_p0 + 0u)] = ((uint8_t)((1u & (v_chunk_bits >> 31u))));
        self->private_data.f_scratch[(v_p0 + 1u)] = ((uint8_t)((1u & (v_chunk_bits >> 30u))));
        self->private_data.f_scratch[(v_p0 + 2u)] = ((uint8_t)((1u & (v_chunk_bits >> 29u))));
        self->private_data.f_scratch[(v_p0 + 3u)] = ((uint8_t)((1u & (v_chunk_bits >> 28u))));
        self->private_data.f_scratch[(v_p0 + 4u)] = ((uint8_t)((1u & (v_chunk_bits >> 27u))));
        self->private_data.f_scratch[(v_p0 + 5u)] = ((uint8_t)((1u & (v_chunk_bits >> 26u))));
        self->private_data.f_scratch[(v_p0 + 6u)] = ((uint8_t)((1u & (v_chunk_bits >> 25u))));
        self->private_data.f_scratch[(v_p0 + 7u)] = ((uint8_t)((1u & (v_chunk_bits >> 24u))));
        self->private_data.f_scratch[(v_p0 + 8u)] = ((uint8_t)((1u & (v_chunk_bits >> 23u))));
        self->private_data.f_scratch[(v_p0 + 9u)] = ((uint8_t)((1u & (v_chunk_bits >> 22u))));
        self->private_data.f_scratch[(v_p0 + 10u)] = ((uint8_t)((1u & (v_chunk_bits >> 21u))));
        self->private_data.f_scratch[(v_p0 + 11u)] = ((uint8_t)((1u & (v_chunk_bits >> 20u))));
        self->private_data.f_scratch[(v_p0 + 12u)] = ((uint8_t)((1u & (v_chunk_bits >> 19u))));
        self->private_data.f_scratch[(v_p0 + 13u)] = ((uint8_t)((1u & (v_chunk_bits >> 18u))));
        self->private_data.f_scratch[(v_p0 + 14u)] = ((uint8_t)((1u & (v_chunk_bits >> 17u))));
        self->private_data.f_scratch[(v_p0 + 15u)] = ((uint8_t)((1u & (v_chunk_bits >> 16u))));
        self->private_data.f_scratch[(v_p0 + 16u)] = ((uint8_t)((1u & (v_chunk_bits >> 15u))));
        self->private_data.f_scratch[(v_p0 + 17u)] = ((uint8_t)((1u & (v_chunk_bits >> 14u))));
        self->private_data.f_scratch[(v_p0 + 18u)] = ((uint8_t)((1u & (v_chunk_bits >> 13u))));
        self->private_data.f_scratch[(v_p0 + 19u)] = ((uint8_t)((1u & (v_chunk_bits >> 12u))));
        self->private_data.f_scratch[(v_p0 + 20u)] = ((uint8_t)((1u & (v_chunk_bits >> 11u))));
        self->private_data.f_scratch[(v_p0 + 21u)] = ((uint8_t)((1u & (v_chunk_bits >> 10u))));
        self->private_data.f_scratch[(v_p0 + 22u)] = ((uint8_t)((1u & (v_chunk_bits >> 9u))));
        self->private_data.f_scratch[(v_p0 + 23u)] = ((uint8_t)((1u & (v_chunk_bits >> 8u))));
        self->private_data.f_scratch[(v_p0 + 24u)] = ((uint8_t)((1u & (v_chunk_bits >> 7u))));
        self->private_data.f_scratch[(v_p0 + 25u)] = ((uint8_t)((1u & (v_chunk_bits >> 6u))));
        self->private_data.f_scratch[(v_p0 + 26u)] = ((uint8_t)((1u & (v_chunk_bits >> 5u))));
        self->private_data.f_scratch[(v_p0 + 27u)] = ((uint8_t)((1u & (v_chunk_bits >> 4u))));
        self->private_data.f_scratch[(v_p0 + 28u)] = ((uint8_t)((1u & (v_chunk_bits >> 3u))));
        self->private_data.f_scratch[(v_p0 + 29u)] = ((uint8_t)((1u & (v_chunk_bits >> 2u))));
        self->private_data.f_scratch[(v_p0 + 30u)] = ((uint8_t)((1u & (v_chunk_bits >> 1u))));
        self->private_data.f_scratch[(v_p0 + 31u)] = ((uint8_t)((1u & (v_chunk_bits >> 0u))));
        v_p0 = ((v_p0 & 511u) + 32u);
        v_chunk_count -= 1u;
      }
    } else if (self->private_impl.f_bits_per_pixel == 2u) {
      v_chunk_count = ((wuffs_base__u32__sat_sub(self->private_impl.f_width, self->private_impl.f_dst_x) + 15u) / 16u);
      v_chunk_count = wuffs_base__u32__min(v_chunk_count, 32u);
      while ((v_chunk_count > 0u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 4u)) {
        v_chunk_bits = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4u;
        self->private_data.f_scratch[(v_p0 + 0u)] = ((uint8_t)((3u & (v_chunk_bits >> 30u))));
        self->private_data.f_scratch[(v_p0 + 1u)] = ((uint8_t)((3u & (v_chunk_bits >> 28u))));
        self->private_data.f_scratch[(v_p0 + 2u)] = ((uint8_t)((3u & (v_chunk_bits >> 26u))));
        self->private_data.f_scratch[(v_p0 + 3u)] = ((uint8_t)((3u & (v_chunk_bits >> 24u))));
        self->private_data.f_scratch[(v_p0 + 4u)] = ((uint8_t)((3u & (v_chunk_bits >> 22u))));
        self->private_data.f_scratch[(v_p0 + 5u)] = ((uint8_t)((3u & (v_chunk_bits >> 20u))));
        self->private_data.f_scratch[(v_p0 + 6u)] = ((uint8_t)((3u & (v_chunk_bits >> 18u))));
        self->private_data.f_scratch[(v_p0 + 7u)] = ((uint8_t)((3u & (v_chunk_bits >> 16u))));
        self->private_data.f_scratch[(v_p0 + 8u)] = ((uint8_t)((3u & (v_chunk_bits >> 14u))));
        self->private_data.f_scratch[(v_p0 + 9u)] = ((uint8_t)((3u & (v_chunk_bits >> 12u))));
        self->private_data.f_scratch[(v_p0 + 10u)] = ((uint8_t)((3u & (v_chunk_bits >> 10u))));
        self->private_data.f_scratch[(v_p0 + 11u)] = ((uint8_t)((3u & (v_chunk_bits >> 8u))));
        self->private_data.f_scratch[(v_p0 + 12u)] = ((uint8_t)((3u & (v_chunk_bits >> 6u))));
        self->private_data.f_scratch[(v_p0 + 13u)] = ((uint8_t)((3u & (v_chunk_bits >> 4u))));
        self->private_data.f_scratch[(v_p0 + 14u)] = ((uint8_t)((3u & (v_chunk_bits >> 2u))));
        self->private_data.f_scratch[(v_p0 + 15u)] = ((uint8_t)((3u & (v_chunk_bits >> 0u))));
        v_p0 = ((v_p0 & 511u) + 16u);
        v_chunk_count -= 1u;
      }
    } else {
      v_chunk_count = ((wuffs_base__u32__sat_sub(self->private_impl.f_width, self->private_impl.f_dst_x) + 7u) / 8u);
      v_chunk_count = wuffs_base__u32__min(v_chunk_count, 64u);
      while ((v_chunk_count > 0u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 4u)) {
        v_chunk_bits = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4u;
        self->private_data.f_scratch[(v_p0 + 0u)] = ((uint8_t)((15u & (v_chunk_bits >> 28u))));
        self->private_data.f_scratch[(v_p0 + 1u)] = ((uint8_t)((15u & (v_chunk_bits >> 24u))));
        self->private_data.f_scratch[(v_p0 + 2u)] = ((uint8_t)((15u & (v_chunk_bits >> 20u))));
        self->private_data.f_scratch[(v_p0 + 3u)] = ((uint8_t)((15u & (v_chunk_bits >> 16u))));
        self->private_data.f_scratch[(v_p0 + 4u)] = ((uint8_t)((15u & (v_chunk_bits >> 12u))));
        self->private_data.f_scratch[(v_p0 + 5u)] = ((uint8_t)((15u & (v_chunk_bits >> 8u))));
        self->private_data.f_scratch[(v_p0 + 6u)] = ((uint8_t)((15u & (v_chunk_bits >> 4u))));
        self->private_data.f_scratch[(v_p0 + 7u)] = ((uint8_t)((15u & (v_chunk_bits >> 0u))));
        v_p0 = ((v_p0 & 511u) + 8u);
        v_chunk_count -= 1u;
      }
    }
    v_p0 = wuffs_base__u32__min(v_p0, wuffs_base__u32__sat_sub(self->private_impl.f_width, self->private_impl.f_dst_x));
    v_n = wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, v_dst_palette, wuffs_base__make_slice_u8(self->private_data.f_scratch, v_p0));
    if (v_n == 0u) {
      status = wuffs_base__make_status(wuffs_bmp__note__internal_note_short_read);
      goto ok;
    }
    wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, ((uint32_t)(v_n)));
  }
  status = wuffs_base__make_status(NULL);
  goto ok;

  ok:
  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bmp.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_bmp__decoder__frame_dirty_rect(
    const wuffs_bmp__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func bmp.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_bmp__decoder__num_animation_loops(
    const wuffs_bmp__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func bmp.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_bmp__decoder__num_decoded_frame_configs(
    const wuffs_bmp__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func bmp.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_bmp__decoder__num_decoded_frames(
    const wuffs_bmp__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func bmp.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__restart_frame(
    wuffs_bmp__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if (a_index != 0u) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  self->private_impl.f_frame_config_io_position = a_io_position;
  return wuffs_base__make_status(NULL);
}

// -------- func bmp.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_bmp__decoder__set_report_metadata(
    wuffs_bmp__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func bmp.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bmp__decoder__tell_me_more(
    wuffs_bmp__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_tell_me_more;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_bmp__decoder__do_tell_me_more(self, a_dst, a_minfo, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_bmp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_tell_me_more = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_tell_me_more = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 4 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func bmp.decoder.do_tell_me_more

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__do_tell_me_more(
    wuffs_bmp__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  if (self->private_impl.f_io_redirect_fourcc <= 1u) {
    status = wuffs_base__make_status(wuffs_base__error__no_more_information);
    goto exit;
  }
  if (a_minfo != NULL) {
    wuffs_base__more_information__set(a_minfo,
        1u,
        self->private_impl.f_io_redirect_fourcc,
        0u,
        self->private_impl.f_io_redirect_pos,
        18446744073709551615u);
  }
  self->private_impl.f_io_redirect_fourcc = 1u;

  goto ok;
  ok:
  goto exit;
  exit:
  return status;
}

// -------- func bmp.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_bmp__decoder__workbuf_len(
    const wuffs_bmp__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

// -------- func bmp.decoder.read_palette

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__read_palette(
    wuffs_bmp__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_i = 0;
  uint32_t v_argb = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_read_palette;
  if (coro_susp_point) {
    v_i = self->private_data.s_read_palette.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_bitmap_info_len == 12u) {
      while ((v_i < 256u) && (self->private_impl.f_padding >= 3u)) {
        self->private_impl.f_padding -= 3u;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
          uint32_t t_0;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) {
            t_0 = ((uint32_t)(wuffs_base__peek_u24le__no_bounds_check(iop_a_src)));
            iop_a_src += 3;
          } else {
            self->private_data.s_read_palette.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_read_palette.scratch;
              uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
              *scratch <<= 8;
              *scratch >>= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
              if (num_bits_0 == 16) {
                t_0 = ((uint32_t)(*scratch));
                break;
              }
              num_bits_0 += 8u;
              *scratch |= ((uint64_t)(num_bits_0)) << 56;
            }
          }
          v_argb = t_0;
        }
        v_argb |= 4278190080u;
        self->private_data.f_src_palette[((4u * v_i) + 0u)] = ((uint8_t)((v_argb >> 0u)));
        self->private_data.f_src_palette[((4u * v_i) + 1u)] = ((uint8_t)((v_argb >> 8u)));
        self->private_data.f_src_palette[((4u * v_i) + 2u)] = ((uint8_t)((v_argb >> 16u)));
        self->private_data.f_src_palette[((4u * v_i) + 3u)] = ((uint8_t)((v_argb >> 24u)));
        v_i += 1u;
      }
    } else {
      while ((v_i < 256u) && (self->private_impl.f_padding >= 4u)) {
        self->private_impl.f_padding -= 4u;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          uint32_t t_1;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_1 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_read_palette.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_read_palette.scratch;
              uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
              *scratch <<= 8;
              *scratch >>= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
              if (num_bits_1 == 24) {
                t_1 = ((uint32_t)(*scratch));
                break;
              }
              num_bits_1 += 8u;
              *scratch |= ((uint64_t)(num_bits_1)) << 56;
            }
          }
          v_argb = t_1;
        }
        v_argb |= 4278190080u;
        self->private_data.f_src_palette[((4u * v_i) + 0u)] = ((uint8_t)((v_argb >> 0u)));
        self->private_data.f_src_palette[((4u * v_i) + 1u)] = ((uint8_t)((v_argb >> 8u)));
        self->private_data.f_src_palette[((4u * v_i) + 2u)] = ((uint8_t)((v_argb >> 16u)));
        self->private_data.f_src_palette[((4u * v_i) + 3u)] = ((uint8_t)((v_argb >> 24u)));
        v_i += 1u;
      }
    }
    while (v_i < 256u) {
      self->private_data.f_src_palette[((4u * v_i) + 0u)] = 0u;
      self->private_data.f_src_palette[((4u * v_i) + 1u)] = 0u;
      self->private_data.f_src_palette[((4u * v_i) + 2u)] = 0u;
      self->private_data.f_src_palette[((4u * v_i) + 3u)] = 255u;
      v_i += 1u;
    }

    goto ok;
    ok:
    self->private_impl.p_read_palette = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_read_palette = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_read_palette.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bmp.decoder.process_masks

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bmp__decoder__process_masks(
    wuffs_bmp__decoder* self) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_i = 0;
  uint32_t v_mask = 0;
  uint32_t v_n = 0;

  while (v_i < 4u) {
    v_mask = self->private_impl.f_channel_masks[v_i];
    if (v_mask != 0u) {
      v_n = 0u;
      while ((v_mask & 1u) == 0u) {
        v_n += 1u;
        v_mask >>= 1u;
      }
      self->private_impl.f_channel_shifts[v_i] = ((uint8_t)((v_n & 31u)));
      v_n = 0u;
      while ((v_mask & 1u) == 1u) {
        v_n += 1u;
        v_mask >>= 1u;
      }
      if ((v_mask != 0u) || (v_n > 32u)) {
        status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
        goto exit;
      }
      self->private_impl.f_channel_num_bits[v_i] = ((uint8_t)(v_n));
    } else if (v_i != 3u) {
      status = wuffs_base__make_status(wuffs_bmp__error__bad_header);
      goto exit;
    }
    v_i += 1u;
  }

  goto ok;
  ok:
  goto exit;
  exit:
  return status;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BMP)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BZIP2)

// ---------------- Status Codes Implementations

const char wuffs_bzip2__error__bad_huffman_code_over_subscribed[] = "#bzip2: bad Huffman code (over-subscribed)";
const char wuffs_bzip2__error__bad_huffman_code_under_subscribed[] = "#bzip2: bad Huffman code (under-subscribed)";
const char wuffs_bzip2__error__bad_block_header[] = "#bzip2: bad block header";
const char wuffs_bzip2__error__bad_block_length[] = "#bzip2: bad block length";
const char wuffs_bzip2__error__bad_checksum[] = "#bzip2: bad checksum";
const char wuffs_bzip2__error__bad_header[] = "#bzip2: bad header";
const char wuffs_bzip2__error__bad_number_of_sections[] = "#bzip2: bad number of sections";
const char wuffs_bzip2__error__truncated_input[] = "#bzip2: truncated input";
const char wuffs_bzip2__error__unsupported_block_randomization[] = "#bzip2: unsupported block randomization";
const char wuffs_bzip2__error__internal_error_inconsistent_huffman_decoder_state[] = "#bzip2: internal error: inconsistent Huffman decoder state";

// ---------------- Private Consts

static const uint8_t
WUFFS_BZIP2__CLAMP_TO_5[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 1u, 2u, 3u, 4u, 5u, 5u, 5u,
};

static const uint32_t
WUFFS_BZIP2__REV_CRC32_TABLE[256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 79764919u, 159529838u, 222504665u, 319059676u, 398814059u, 445009330u, 507990021u,
  638119352u, 583659535u, 797628118u, 726387553u, 890018660u, 835552979u, 1015980042u, 944750013u,
  1276238704u, 1221641927u, 1167319070u, 1095957929u, 1595256236u, 1540665371u, 1452775106u, 1381403509u,
  1780037320u, 1859660671u, 1671105958u, 1733955601u, 2031960084u, 2111593891u, 1889500026u, 1952343757u,
  2552477408u, 2632100695u, 2443283854u, 2506133561u, 2334638140u, 2414271883u, 2191915858u, 2254759653u,
  3190512472u, 3135915759u, 3081330742u, 3009969537u, 2905550212u, 2850959411u, 2762807018u, 2691435357u,
  3560074640u, 3505614887u, 3719321342u, 3648080713u, 3342211916u, 3287746299u, 3467911202u, 3396681109u,
  4063920168u, 4143685023u, 4223187782u, 4286162673u, 3779000052u, 3858754371u, 3904687514u, 3967668269u,
  881225847u, 809987520u, 1023691545u, 969234094u, 662832811u, 591600412u, 771767749u, 717299826u,
  311336399u, 374308984u, 453813921u, 533576470u, 25881363u, 88864420u, 134795389u, 214552010u,
  2023205639u, 2086057648u, 1897238633u, 1976864222u, 1804852699u, 1867694188u, 1645340341u, 1724971778u,
  1587496639u, 1516133128u, 1461550545u, 1406951526u, 1302016099u, 1230646740u, 1142491917u, 1087903418u,
  2896545431u, 2825181984u, 2770861561u, 2716262478u, 3215044683u, 3143675388u, 3055782693u, 3001194130u,
  2326604591u, 2389456536u, 2200899649u, 2280525302u, 2578013683u, 2640855108u, 2418763421u, 2498394922u,
  3769900519u, 3832873040u, 3912640137u, 3992402750u, 4088425275u, 4151408268u, 4197601365u, 4277358050u,
  3334271071u, 3263032808u, 3476998961u, 3422541446u, 3585640067u, 3514407732u, 3694837229u, 3640369242u,
  1762451694u, 1842216281u, 1619975040u, 1682949687u, 2047383090u, 2127137669u, 1938468188u, 2001449195u,
  1325665622u, 1271206113u, 1183200824u, 1111960463u, 1543535498u, 1489069629u, 1434599652u, 1363369299u,
  622672798u, 568075817u, 748617968u, 677256519u, 907627842u, 853037301u, 1067152940u, 995781531u,
  51762726u, 131386257u, 177728840u, 240578815u, 269590778u, 349224269u, 429104020u, 491947555u,
  4046411278u, 4126034873u, 4172115296u, 4234965207u, 3794477266u, 3874110821u, 3953728444u, 4016571915u,
  3609705398u, 3555108353u, 3735388376u, 3664026991u, 3290680682u, 3236090077u, 3449943556u, 3378572211u,
  3174993278u, 3120533705u, 3032266256u, 2961025959u, 2923101090u, 2868635157u, 2813903052u, 2742672763u,
  2604032198u, 2683796849u, 2461293480u, 2524268063u, 2284983834u, 2364738477u, 2175806836u, 2238787779u,
  1569362073u, 1498123566u, 1409854455u, 1355396672u, 1317987909u, 1246755826u, 1192025387u, 1137557660u,
  2072149281u, 2135122070u, 1912620623u, 1992383480u, 1753615357u, 1816598090u, 1627664531u, 1707420964u,
  295390185u, 358241886u, 404320391u, 483945776u, 43990325u, 106832002u, 186451547u, 266083308u,
  932423249u, 861060070u, 1041341759u, 986742920u, 613929101u, 542559546u, 756411363u, 701822548u,
  3316196985u, 3244833742u, 3425377559u, 3370778784u, 3601682597u, 3530312978u, 3744426955u, 3689838204u,
  3819031489u, 3881883254u, 3928223919u, 4007849240u, 4037393693u, 4100235434u, 4180117107u, 4259748804u,
  2310601993u, 2373574846u, 2151335527u, 2231098320u, 2596047829u, 2659030626u, 2470359227u, 2550115596u,
  2947551409u, 2876312838u, 2788305887u, 2733848168u, 3165939309u, 3094707162u, 3040238851u, 2985771188u,
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__do_transform_io(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__prepare_block(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__read_code_lengths(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__build_huffman_tree(
    wuffs_bzip2__decoder* self,
    uint32_t a_which);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_bzip2__decoder__build_huffman_table(
    wuffs_bzip2__decoder* self,
    uint32_t a_which);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_bzip2__decoder__invert_bwt(
    wuffs_bzip2__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_bzip2__decoder__flush_fast(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_dst);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__flush_slow(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_dst);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__decode_huffman_fast(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__decode_huffman_slow(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_src);

// ---------------- VTables

const wuffs_base__io_transformer__func_ptrs
wuffs_bzip2__decoder__func_ptrs_for__wuffs_base__io_transformer = {
  (wuffs_base__optional_u63(*)(const void*))(&wuffs_bzip2__decoder__dst_history_retain_length),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_bzip2__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_bzip2__decoder__set_quirk),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_bzip2__decoder__transform_io),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_bzip2__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_bzip2__decoder__initialize(
    wuffs_bzip2__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__io_transformer.vtable_name =
      wuffs_base__io_transformer__vtable_name;
  self->private_impl.vtable_for__wuffs_base__io_transformer.function_pointers =
      (const void*)(&wuffs_bzip2__decoder__func_ptrs_for__wuffs_base__io_transformer);
  return wuffs_base__make_status(NULL);
}

wuffs_bzip2__decoder*
wuffs_bzip2__decoder__alloc(void) {
  wuffs_bzip2__decoder* x =
      (wuffs_bzip2__decoder*)(calloc(1, sizeof(wuffs_bzip2__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_bzip2__decoder__initialize(
      x, sizeof(wuffs_bzip2__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_bzip2__decoder(void) {
  return sizeof(wuffs_bzip2__decoder);
}

// ---------------- Function Implementations

// -------- func bzip2.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_bzip2__decoder__get_quirk(
    const wuffs_bzip2__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if ((a_key == 1u) && self->private_impl.f_ignore_checksum) {
    return 1u;
  }
  return 0u;
}

// -------- func bzip2.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bzip2__decoder__set_quirk(
    wuffs_bzip2__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (a_key == 1u) {
    self->private_impl.f_ignore_checksum = (a_value > 0u);
    return wuffs_base__make_status(NULL);
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func bzip2.decoder.dst_history_retain_length

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_bzip2__decoder__dst_history_retain_length(
    const wuffs_bzip2__decoder* self) {
  if (!self) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }

  return wuffs_base__utility__make_optional_u63(true, 0u);
}

// -------- func bzip2.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_bzip2__decoder__workbuf_len(
    const wuffs_bzip2__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

// -------- func bzip2.decoder.transform_io

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_bzip2__decoder__transform_io(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_bzip2__decoder__do_transform_io(self, a_dst, a_src, a_workbuf);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_bzip2__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func bzip2.decoder.do_transform_io

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__do_transform_io(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_i = 0;
  uint64_t v_tag = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint32_t v_final_checksum_want = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_transform_io;
  if (coro_susp_point) {
    v_i = self->private_data.s_do_transform_io.v_i;
    v_tag = self->private_data.s_do_transform_io.v_tag;
    v_final_checksum_want = self->private_data.s_do_transform_io.v_final_checksum_want;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_c8 = t_0;
    }
    if (v_c8 != 66u) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_1 = *iop_a_src++;
      v_c8 = t_1;
    }
    if (v_c8 != 90u) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_2 = *iop_a_src++;
      v_c8 = t_2;
    }
    if (v_c8 != 104u) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_3 = *iop_a_src++;
      v_c8 = t_3;
    }
    if ((v_c8 < 49u) || (57u < v_c8)) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_header);
      goto exit;
    }
    self->private_impl.f_max_incl_block_size = (((uint32_t)(((uint8_t)(v_c8 - 48u)))) * 100000u);
    while (true) {
      v_tag = 0u;
      v_i = 0u;
      while (v_i < 48u) {
        if (self->private_impl.f_n_bits <= 0u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_4 = *iop_a_src++;
            v_c8 = t_4;
          }
          self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
          self->private_impl.f_n_bits = 8u;
        }
        v_tag <<= 1u;
        v_tag |= ((uint64_t)((self->private_impl.f_bits >> 31u)));
        self->private_impl.f_bits <<= 1u;
        self->private_impl.f_n_bits -= 1u;
        v_i += 1u;
      }
      if (v_tag == 25779555029136u) {
        break;
      } else if (v_tag != 54156738319193u) {
        status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_header);
        goto exit;
      }
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
      status = wuffs_bzip2__decoder__prepare_block(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      self->private_impl.f_block_size = 0u;
      self->private_impl.f_decode_huffman_finished = false;
      self->private_impl.f_decode_huffman_which = WUFFS_BZIP2__CLAMP_TO_5[((uint8_t)(self->private_data.f_huffman_selectors[0u] & 7u))];
      self->private_impl.f_decode_huffman_ticks = 50u;
      self->private_impl.f_decode_huffman_section = 0u;
      self->private_impl.f_decode_huffman_run_shift = 0u;
      while ( ! self->private_impl.f_decode_huffman_finished) {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        v_status = wuffs_bzip2__decoder__decode_huffman_fast(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (wuffs_base__status__is_error(&v_status)) {
          status = v_status;
          goto exit;
        } else if (self->private_impl.f_decode_huffman_finished) {
          break;
        }
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
        status = wuffs_bzip2__decoder__decode_huffman_slow(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
      }
      wuffs_bzip2__decoder__invert_bwt(self);
      self->private_impl.f_block_checksum_have = 4294967295u;
      if (self->private_impl.f_original_pointer >= self->private_impl.f_block_size) {
        status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_length);
        goto exit;
      }
      self->private_impl.f_flush_pointer = (self->private_data.f_bwt[self->private_impl.f_original_pointer] >> 12u);
      self->private_impl.f_flush_repeat_count = 0u;
      self->private_impl.f_flush_prev = 0u;
      while (self->private_impl.f_block_size > 0u) {
        wuffs_bzip2__decoder__flush_fast(self, a_dst);
        if (self->private_impl.f_block_size <= 0u) {
          break;
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
        status = wuffs_bzip2__decoder__flush_slow(self, a_dst);
        if (status.repr) {
          goto suspend;
        }
      }
      self->private_impl.f_block_checksum_have ^= 4294967295u;
      if ( ! self->private_impl.f_ignore_checksum && (self->private_impl.f_block_checksum_have != self->private_impl.f_block_checksum_want)) {
        status = wuffs_base__make_status(wuffs_bzip2__error__bad_checksum);
        goto exit;
      }
      self->private_impl.f_final_checksum_have = (self->private_impl.f_block_checksum_have ^ ((self->private_impl.f_final_checksum_have >> 31u) | ((uint32_t)(self->private_impl.f_final_checksum_have << 1u))));
    }
    v_final_checksum_want = 0u;
    v_i = 0u;
    while (v_i < 32u) {
      if (self->private_impl.f_n_bits <= 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_5 = *iop_a_src++;
          v_c8 = t_5;
        }
        self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
        self->private_impl.f_n_bits = 8u;
      }
      v_final_checksum_want <<= 1u;
      v_final_checksum_want |= (self->private_impl.f_bits >> 31u);
      self->private_impl.f_bits <<= 1u;
      self->private_impl.f_n_bits -= 1u;
      v_i += 1u;
    }
    if ( ! self->private_impl.f_ignore_checksum && (self->private_impl.f_final_checksum_have != v_final_checksum_want)) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_checksum);
      goto exit;
    }

    goto ok;
    ok:
    self->private_impl.p_do_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_transform_io.v_i = v_i;
  self->private_data.s_do_transform_io.v_tag = v_tag;
  self->private_data.s_do_transform_io.v_final_checksum_want = v_final_checksum_want;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bzip2.decoder.prepare_block

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__prepare_block(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_i = 0;
  uint32_t v_j = 0;
  uint32_t v_selector = 0;
  uint32_t v_sel_ff = 0;
  uint8_t v_movee = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_prepare_block;
  if (coro_susp_point) {
    v_i = self->private_data.s_prepare_block.v_i;
    v_selector = self->private_data.s_prepare_block.v_selector;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_block_checksum_want = 0u;
    v_i = 0u;
    while (v_i < 32u) {
      if (self->private_impl.f_n_bits <= 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_0 = *iop_a_src++;
          v_c8 = t_0;
        }
        self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
        self->private_impl.f_n_bits = 8u;
      }
      self->private_impl.f_block_checksum_want <<= 1u;
      self->private_impl.f_block_checksum_want |= (self->private_impl.f_bits >> 31u);
      self->private_impl.f_bits <<= 1u;
      self->private_impl.f_n_bits -= 1u;
      v_i += 1u;
    }
    if (self->private_impl.f_n_bits <= 0u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_1 = *iop_a_src++;
        v_c8 = t_1;
      }
      self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
      self->private_impl.f_n_bits = 8u;
    }
    if ((self->private_impl.f_bits >> 31u) != 0u) {
      status = wuffs_base__make_status(wuffs_bzip2__error__unsupported_block_randomization);
      goto exit;
    }
    self->private_impl.f_bits <<= 1u;
    self->private_impl.f_n_bits -= 1u;
    self->private_impl.f_original_pointer = 0u;
    v_i = 0u;
    while (v_i < 24u) {
      if (self->private_impl.f_n_bits <= 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          v_c8 = t_2;
        }
        self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
        self->private_impl.f_n_bits = 8u;
      }
      self->private_impl.f_original_pointer <<= 1u;
      self->private_impl.f_original_pointer |= (self->private_impl.f_bits >> 31u);
      self->private_impl.f_bits <<= 1u;
      self->private_impl.f_n_bits -= 1u;
      v_i += 1u;
    }
    v_i = 0u;
    while (v_i < 256u) {
      self->private_data.f_presence[v_i] = 0u;
      v_i += 1u;
    }
    v_i = 0u;
    while (v_i < 256u) {
      if (self->private_impl.f_n_bits <= 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_3 = *iop_a_src++;
          v_c8 = t_3;
        }
        self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
        self->private_impl.f_n_bits = 8u;
      }
      if ((self->private_impl.f_bits >> 31u) != 0u) {
        self->private_data.f_presence[v_i] = 1u;
      }
      self->private_impl.f_bits <<= 1u;
      self->private_impl.f_n_bits -= 1u;
      v_i += 16u;
    }
    self->private_data.f_scratch = 0u;
    v_i = 0u;
    while (v_i < 256u) {
      if (self->private_data.f_presence[v_i] == 0u) {
        v_i += 16u;
        continue;
      }
      while (true) {
        if (self->private_impl.f_n_bits <= 0u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_4 = *iop_a_src++;
            v_c8 = t_4;
          }
          self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
          self->private_impl.f_n_bits = 8u;
        }
        self->private_data.f_scratch += (self->private_impl.f_bits >> 31u);
        self->private_data.f_presence[(v_i & 255u)] = ((uint8_t)((self->private_impl.f_bits >> 31u)));
        self->private_impl.f_bits <<= 1u;
        self->private_impl.f_n_bits -= 1u;
        v_i += 1u;
        if ((v_i & 15u) == 0u) {
          break;
        }
      }
    }
    if ((self->private_data.f_scratch < 1u) || (256u < self->private_data.f_scratch)) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_header);
      goto exit;
    }
    self->private_impl.f_num_symbols = (self->private_data.f_scratch + 2u);
    self->private_data.f_scratch = 0u;
    v_i = 0u;
    while (v_i < 3u) {
      if (self->private_impl.f_n_bits <= 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_5 = *iop_a_src++;
          v_c8 = t_5;
        }
        self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
        self->private_impl.f_n_bits = 8u;
      }
      self->private_data.f_scratch <<= 1u;
      self->private_data.f_scratch |= (self->private_impl.f_bits >> 31u);
      self->private_impl.f_bits <<= 1u;
      self->private_impl.f_n_bits -= 1u;
      v_i += 1u;
    }
    if ((self->private_data.f_scratch < 2u) || (6u < self->private_data.f_scratch)) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_header);
      goto exit;
    }
    self->private_impl.f_num_huffman_codes = self->private_data.f_scratch;
    self->private_data.f_scratch = 0u;
    v_i = 0u;
    while (v_i < 15u) {
      if (self->private_impl.f_n_bits <= 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_6 = *iop_a_src++;
          v_c8 = t_6;
        }
        self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
        self->private_impl.f_n_bits = 8u;
      }
      self->private_data.f_scratch <<= 1u;
      self->private_data.f_scratch |= (self->private_impl.f_bits >> 31u);
      self->private_impl.f_bits <<= 1u;
      self->private_impl.f_n_bits -= 1u;
      v_i += 1u;
    }
    if ((self->private_data.f_scratch < 1u) || (18001u < self->private_data.f_scratch)) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_header);
      goto exit;
    }
    self->private_impl.f_num_sections = self->private_data.f_scratch;
    v_i = 0u;
    while (v_i < self->private_impl.f_num_huffman_codes) {
      self->private_data.f_mtft[v_i] = ((uint8_t)(v_i));
      v_i += 1u;
    }
    v_i = 0u;
    while (v_i < self->private_impl.f_num_sections) {
      v_selector = 0u;
      while (true) {
        if (self->private_impl.f_n_bits <= 0u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_7 = *iop_a_src++;
            v_c8 = t_7;
          }
          self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
          self->private_impl.f_n_bits = 8u;
        }
        if ((self->private_impl.f_bits >> 31u) == 0u) {
          self->private_impl.f_bits <<= 1u;
          self->private_impl.f_n_bits -= 1u;
          break;
        }
        self->private_impl.f_bits <<= 1u;
        self->private_impl.f_n_bits -= 1u;
        v_selector += 1u;
        if (v_selector >= self->private_impl.f_num_huffman_codes) {
          status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_header);
          goto exit;
        }
      }
      if (v_selector == 0u) {
        self->private_data.f_huffman_selectors[v_i] = self->private_data.f_mtft[0u];
      } else {
        v_sel_ff = (v_selector & 255u);
        v_movee = self->private_data.f_mtft[v_sel_ff];
        wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8_ij(self->private_data.f_mtft, 1, (1u + v_sel_ff)), wuffs_base__make_slice_u8(self->private_data.f_mtft, v_sel_ff));
        self->private_data.f_mtft[0u] = v_movee;
        self->private_data.f_huffman_selectors[v_i] = v_movee;
      }
      v_i += 1u;
    }
    v_i = 0u;
    while (v_i < self->private_impl.f_num_huffman_codes) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
      status = wuffs_bzip2__decoder__read_code_lengths(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      v_status = wuffs_bzip2__decoder__build_huffman_tree(self, v_i);
      if (wuffs_base__status__is_error(&v_status)) {
        status = v_status;
        goto exit;
      }
      wuffs_bzip2__decoder__build_huffman_table(self, v_i);
      v_i += 1u;
    }
    v_i = 0u;
    v_j = 0u;
    while (v_i < 256u) {
      if (self->private_data.f_presence[v_i] != 0u) {
        self->private_data.f_mtft[(v_j & 255u)] = ((uint8_t)(v_i));
        v_j += 1u;
      }
      v_i += 1u;
    }
    v_i = 0u;
    while (v_i < 256u) {
      self->private_data.f_letter_counts[v_i] = 0u;
      v_i += 1u;
    }

    goto ok;
    ok:
    self->private_impl.p_prepare_block = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_prepare_block = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_prepare_block.v_i = v_i;
  self->private_data.s_prepare_block.v_selector = v_selector;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bzip2.decoder.read_code_lengths

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__read_code_lengths(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_i = 0;
  uint32_t v_code_length = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_read_code_lengths;
  if (coro_susp_point) {
    v_i = self->private_data.s_read_code_lengths.v_i;
    v_code_length = self->private_data.s_read_code_lengths.v_code_length;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_code_lengths_bitmask = 0u;
    v_i = 0u;
    while (v_i < 5u) {
      if (self->private_impl.f_n_bits <= 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_0 = *iop_a_src++;
          v_c8 = t_0;
        }
        self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
        self->private_impl.f_n_bits = 8u;
      }
      v_code_length <<= 1u;
      v_code_length |= (self->private_impl.f_bits >> 31u);
      self->private_impl.f_bits <<= 1u;
      self->private_impl.f_n_bits -= 1u;
      v_i += 1u;
    }
    v_i = 0u;
    while (v_i < self->private_impl.f_num_symbols) {
      while (true) {
        if ((v_code_length < 1u) || (20u < v_code_length)) {
          status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_header);
          goto exit;
        }
        if (self->private_impl.f_n_bits <= 0u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_1 = *iop_a_src++;
            v_c8 = t_1;
          }
          self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
          self->private_impl.f_n_bits = 8u;
        }
        if ((self->private_impl.f_bits >> 31u) == 0u) {
          self->private_impl.f_bits <<= 1u;
          self->private_impl.f_n_bits -= 1u;
          break;
        }
        self->private_impl.f_bits <<= 1u;
        self->private_impl.f_n_bits -= 1u;
        if (self->private_impl.f_n_bits <= 0u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_2 = *iop_a_src++;
            v_c8 = t_2;
          }
          self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
          self->private_impl.f_n_bits = 8u;
        }
        if ((self->private_impl.f_bits >> 31u) == 0u) {
          v_code_length += 1u;
        } else {
          v_code_length -= 1u;
        }
        self->private_impl.f_bits <<= 1u;
        self->private_impl.f_n_bits -= 1u;
      }
      self->private_impl.f_code_lengths_bitmask |= (((uint32_t)(1u)) << (v_code_length & 31u));
      self->private_data.f_bwt[v_i] = v_code_length;
      v_i += 1u;
    }

    goto ok;
    ok:
    self->private_impl.p_read_code_lengths = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_read_code_lengths = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_read_code_lengths.v_i = v_i;
  self->private_data.s_read_code_lengths.v_code_length = v_code_length;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bzip2.decoder.build_huffman_tree

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__build_huffman_tree(
    wuffs_bzip2__decoder* self,
    uint32_t a_which) {
  uint32_t v_code_length = 0;
  uint32_t v_symbol_index = 0;
  uint32_t v_num_branch_nodes = 0;
  uint32_t v_stack_height = 0;
  uint32_t v_stack_values[21] = {0};
  uint32_t v_node_index = 0;
  uint16_t v_leaf_value = 0;

  self->private_data.f_huffman_trees[a_which][0u][0u] = 0u;
  self->private_data.f_huffman_trees[a_which][0u][1u] = 0u;
  v_num_branch_nodes = 1u;
  v_stack_height = 1u;
  v_stack_values[0u] = 0u;
  v_code_length = 1u;
  while (v_code_length <= 20u) {
    if ((self->private_impl.f_code_lengths_bitmask & (((uint32_t)(1u)) << v_code_length)) == 0u) {
      v_code_length += 1u;
      continue;
    }
    v_symbol_index = 0u;
    while (v_symbol_index < self->private_impl.f_num_symbols) {
      if (self->private_data.f_bwt[v_symbol_index] != v_code_length) {
        v_symbol_index += 1u;
        continue;
      }
      while (true) {
        if (v_stack_height <= 0u) {
          return wuffs_base__make_status(wuffs_bzip2__error__bad_huffman_code_over_subscribed);
        } else if (v_stack_height >= v_code_length) {
          break;
        }
        v_node_index = v_stack_values[(v_stack_height - 1u)];
        if (self->private_data.f_huffman_trees[a_which][v_node_index][0u] == 0u) {
          self->private_data.f_huffman_trees[a_which][v_node_index][0u] = ((uint16_t)(v_num_branch_nodes));
        } else {
          self->private_data.f_huffman_trees[a_which][v_node_index][1u] = ((uint16_t)(v_num_branch_nodes));
        }
        if (v_num_branch_nodes >= 257u) {
          return wuffs_base__make_status(wuffs_bzip2__error__bad_huffman_code_under_subscribed);
        }
        v_stack_values[v_stack_height] = v_num_branch_nodes;
        self->private_data.f_huffman_trees[a_which][v_num_branch_nodes][0u] = 0u;
        self->private_data.f_huffman_trees[a_which][v_num_branch_nodes][1u] = 0u;
        v_num_branch_nodes += 1u;
        v_stack_height += 1u;
      }
      v_node_index = v_stack_values[(v_stack_height - 1u)];
      if (v_symbol_index < 2u) {
        v_leaf_value = ((uint16_t)((769u + v_symbol_index)));
      } else if ((v_symbol_index + 1u) < self->private_impl.f_num_symbols) {
        v_leaf_value = ((uint16_t)((511u + v_symbol_index)));
      } else {
        v_leaf_value = 768u;
      }
      if (self->private_data.f_huffman_trees[a_which][v_node_index][0u] == 0u) {
        self->private_data.f_huffman_trees[a_which][v_node_index][0u] = v_leaf_value;
      } else {
        self->private_data.f_huffman_trees[a_which][v_node_index][1u] = v_leaf_value;
        v_stack_height -= 1u;
        while (v_stack_height > 0u) {
          v_node_index = v_stack_values[(v_stack_height - 1u)];
          if (self->private_data.f_huffman_trees[a_which][v_node_index][1u] == 0u) {
            break;
          }
          v_stack_height -= 1u;
        }
      }
      v_symbol_index += 1u;
    }
    v_code_length += 1u;
  }
  if (v_stack_height != 0u) {
    return wuffs_base__make_status(wuffs_bzip2__error__bad_huffman_code_under_subscribed);
  }
  return wuffs_base__make_status(NULL);
}

// -------- func bzip2.decoder.build_huffman_table

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_bzip2__decoder__build_huffman_table(
    wuffs_bzip2__decoder* self,
    uint32_t a_which) {
  uint32_t v_i = 0;
  uint32_t v_bits = 0;
  uint16_t v_n_bits = 0;
  uint16_t v_child = 0;

  while (v_i < 256u) {
    v_bits = (v_i << 24u);
    v_n_bits = 0u;
    v_child = 0u;
    while ((v_child < 257u) && (v_n_bits < 8u)) {
      v_child = self->private_data.f_huffman_trees[a_which][v_child][(v_bits >> 31u)];
      v_bits <<= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
      v_n_bits += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    }
    self->private_data.f_huffman_tables[a_which][v_i] = ((uint16_t)(((uint16_t)(v_child | ((uint16_t)(v_n_bits << 12u))))));
    v_i += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func bzip2.decoder.invert_bwt

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_bzip2__decoder__invert_bwt(
    wuffs_bzip2__decoder* self) {
  uint32_t v_i = 0;
  uint32_t v_letter = 0;
  uint32_t v_sum = 0;
  uint32_t v_old_sum = 0;

  v_sum = 0u;
  v_i = 0u;
  while (v_i < 256u) {
    v_old_sum = v_sum;
    v_sum += self->private_data.f_letter_counts[v_i];
    self->private_data.f_letter_counts[v_i] = v_old_sum;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < self->private_impl.f_block_size) {
    v_letter = (self->private_data.f_bwt[v_i] & 255u);
    self->private_data.f_bwt[(self->private_data.f_letter_counts[v_letter] & 1048575u)] |= (v_i << 12u);
    self->private_data.f_letter_counts[v_letter] += 1u;
    v_i += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func bzip2.decoder.flush_fast

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_bzip2__decoder__flush_fast(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_dst) {
  uint32_t v_flush_pointer = 0;
  uint32_t v_flush_repeat_count = 0;
  uint8_t v_flush_prev = 0;
  uint32_t v_block_checksum_have = 0;
  uint32_t v_block_size = 0;
  uint32_t v_entry = 0;
  uint8_t v_curr = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }

  v_flush_pointer = self->private_impl.f_flush_pointer;
  v_flush_repeat_count = self->private_impl.f_flush_repeat_count;
  v_flush_prev = self->private_impl.f_flush_prev;
  v_block_checksum_have = self->private_impl.f_block_checksum_have;
  v_block_size = self->private_impl.f_block_size;
  while ((v_block_size > 0u) && (((uint64_t)(io2_a_dst - iop_a_dst)) >= 255u)) {
    if (v_flush_repeat_count < 4u) {
      v_entry = self->private_data.f_bwt[v_flush_pointer];
      v_curr = ((uint8_t)(v_entry));
      v_flush_pointer = (v_entry >> 12u);
      if (v_curr == v_flush_prev) {
        v_flush_repeat_count += 1u;
      } else {
        v_flush_repeat_count = 1u;
      }
      v_block_checksum_have = (WUFFS_BZIP2__REV_CRC32_TABLE[((uint8_t)(((uint8_t)((v_block_checksum_have >> 24u))) ^ v_curr))] ^ ((uint32_t)(v_block_checksum_have << 8u)));
      (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, v_curr), iop_a_dst += 1);
      v_flush_prev = v_curr;
      v_block_size -= 1u;
    } else {
      v_entry = self->private_data.f_bwt[v_flush_pointer];
      v_curr = ((uint8_t)(v_entry));
      v_flush_pointer = (v_entry >> 12u);
      v_flush_repeat_count = ((uint32_t)(v_curr));
      while (v_flush_repeat_count > 0u) {
        v_block_checksum_have = (WUFFS_BZIP2__REV_CRC32_TABLE[((uint8_t)(((uint8_t)((v_block_checksum_have >> 24u))) ^ v_flush_prev))] ^ ((uint32_t)(v_block_checksum_have << 8u)));
        if (((uint64_t)(io2_a_dst - iop_a_dst)) > 0u) {
          (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, v_flush_prev), iop_a_dst += 1);
        }
        v_flush_repeat_count -= 1u;
      }
      v_flush_repeat_count = 0u;
      v_flush_prev = v_curr;
      v_block_size -= 1u;
    }
  }
  self->private_impl.f_flush_pointer = v_flush_pointer;
  self->private_impl.f_flush_repeat_count = v_flush_repeat_count;
  self->private_impl.f_flush_prev = v_flush_prev;
  self->private_impl.f_block_checksum_have = v_block_checksum_have;
  if (v_block_size <= 900000u) {
    self->private_impl.f_block_size = v_block_size;
  }
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }

  return wuffs_base__make_empty_struct();
}

// -------- func bzip2.decoder.flush_slow

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__flush_slow(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_dst) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_flush_pointer = 0;
  uint32_t v_flush_repeat_count = 0;
  uint8_t v_flush_prev = 0;
  uint32_t v_block_checksum_have = 0;
  uint32_t v_block_size = 0;
  uint32_t v_entry = 0;
  uint8_t v_curr = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }

  uint32_t coro_susp_point = self->private_impl.p_flush_slow;
  if (coro_susp_point) {
    v_flush_pointer = self->private_data.s_flush_slow.v_flush_pointer;
    v_flush_repeat_count = self->private_data.s_flush_slow.v_flush_repeat_count;
    v_flush_prev = self->private_data.s_flush_slow.v_flush_prev;
    v_block_checksum_have = self->private_data.s_flush_slow.v_block_checksum_have;
    v_block_size = self->private_data.s_flush_slow.v_block_size;
    v_curr = self->private_data.s_flush_slow.v_curr;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    v_flush_pointer = self->private_impl.f_flush_pointer;
    v_flush_repeat_count = self->private_impl.f_flush_repeat_count;
    v_flush_prev = self->private_impl.f_flush_prev;
    v_block_checksum_have = self->private_impl.f_block_checksum_have;
    v_block_size = self->private_impl.f_block_size;
    while ((v_block_size > 0u) &&  ! (self->private_impl.p_flush_slow != 0)) {
      if (v_flush_repeat_count < 4u) {
        v_entry = self->private_data.f_bwt[v_flush_pointer];
        v_curr = ((uint8_t)(v_entry));
        v_flush_pointer = (v_entry >> 12u);
        if (v_curr == v_flush_prev) {
          v_flush_repeat_count += 1u;
        } else {
          v_flush_repeat_count = 1u;
        }
        v_block_checksum_have = (WUFFS_BZIP2__REV_CRC32_TABLE[((uint8_t)(((uint8_t)((v_block_checksum_have >> 24u))) ^ v_curr))] ^ ((uint32_t)(v_block_checksum_have << 8u)));
        self->private_data.s_flush_slow.scratch = v_curr;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (iop_a_dst == io2_a_dst) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_write);
          goto suspend;
        }
        *iop_a_dst++ = ((uint8_t)(self->private_data.s_flush_slow.scratch));
        v_flush_prev = v_curr;
        v_block_size -= 1u;
      } else {
        v_entry = self->private_data.f_bwt[v_flush_pointer];
        v_curr = ((uint8_t)(v_entry));
        v_flush_pointer = (v_entry >> 12u);
        v_flush_repeat_count = ((uint32_t)(v_curr));
        while (v_flush_repeat_count > 0u) {
          v_block_checksum_have = (WUFFS_BZIP2__REV_CRC32_TABLE[((uint8_t)(((uint8_t)((v_block_checksum_have >> 24u))) ^ v_flush_prev))] ^ ((uint32_t)(v_block_checksum_have << 8u)));
          self->private_data.s_flush_slow.scratch = v_flush_prev;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (iop_a_dst == io2_a_dst) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_write);
            goto suspend;
          }
          *iop_a_dst++ = ((uint8_t)(self->private_data.s_flush_slow.scratch));
          v_flush_repeat_count -= 1u;
        }
        v_flush_repeat_count = 0u;
        v_flush_prev = v_curr;
        v_block_size -= 1u;
      }
    }
    self->private_impl.f_flush_pointer = v_flush_pointer;
    self->private_impl.f_flush_repeat_count = v_flush_repeat_count;
    self->private_impl.f_flush_prev = v_flush_prev;
    self->private_impl.f_block_checksum_have = v_block_checksum_have;
    if (v_block_size <= 900000u) {
      self->private_impl.f_block_size = v_block_size;
    }

    goto ok;
    ok:
    self->private_impl.p_flush_slow = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_flush_slow = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_flush_slow.v_flush_pointer = v_flush_pointer;
  self->private_data.s_flush_slow.v_flush_repeat_count = v_flush_repeat_count;
  self->private_data.s_flush_slow.v_flush_prev = v_flush_prev;
  self->private_data.s_flush_slow.v_block_checksum_have = v_block_checksum_have;
  self->private_data.s_flush_slow.v_block_size = v_block_size;
  self->private_data.s_flush_slow.v_curr = v_curr;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }

  return status;
}

// -------- func bzip2.decoder.decode_huffman_fast

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__decode_huffman_fast(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint32_t v_block_size = 0;
  uint8_t v_which = 0;
  uint32_t v_ticks = 0;
  uint32_t v_section = 0;
  uint32_t v_run_shift = 0;
  uint16_t v_table_entry = 0;
  uint16_t v_child = 0;
  uint32_t v_child_ff = 0;
  uint32_t v_i = 0;
  uint32_t v_j = 0;
  uint32_t v_output = 0;
  uint32_t v_run = 0;
  uint32_t v_mtft0 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_bits = self->private_impl.f_bits;
  v_n_bits = self->private_impl.f_n_bits;
  v_block_size = self->private_impl.f_block_size;
  v_which = self->private_impl.f_decode_huffman_which;
  v_ticks = self->private_impl.f_decode_huffman_ticks;
  v_section = self->private_impl.f_decode_huffman_section;
  v_run_shift = self->private_impl.f_decode_huffman_run_shift;
  while (((uint64_t)(io2_a_src - iop_a_src)) >= 4u) {
    if (v_ticks > 0u) {
      v_ticks -= 1u;
    } else {
      v_ticks = 49u;
      v_section += 1u;
      if (v_section >= self->private_impl.f_num_sections) {
        status = wuffs_base__make_status(wuffs_bzip2__error__bad_number_of_sections);
        goto exit;
      }
      v_which = WUFFS_BZIP2__CLAMP_TO_5[((uint8_t)(self->private_data.f_huffman_selectors[(v_section & 32767u)] & 7u))];
    }
    v_bits |= (wuffs_base__peek_u32be__no_bounds_check(iop_a_src) >> v_n_bits);
    iop_a_src += ((31u - v_n_bits) >> 3u);
    v_n_bits |= 24u;
    v_table_entry = self->private_data.f_huffman_tables[v_which][(v_bits >> 24u)];
    v_bits <<= ((uint16_t)(v_table_entry >> 12u));
    v_n_bits -= ((uint32_t)(((uint16_t)(v_table_entry >> 12u))));
    v_child = ((uint16_t)(v_table_entry & 1023u));
    while (v_child < 257u) {
      v_child = self->private_data.f_huffman_trees[v_which][v_child][(v_bits >> 31u)];
      v_bits <<= 1u;
      if (v_n_bits <= 0u) {
        status = wuffs_base__make_status(wuffs_bzip2__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      }
      v_n_bits -= 1u;
    }
    if (v_child < 768u) {
      v_child_ff = ((uint32_t)(((uint16_t)(v_child & 255u))));
      v_output = ((uint32_t)(self->private_data.f_mtft[v_child_ff]));
      wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8_ij(self->private_data.f_mtft, 1, (1u + v_child_ff)), wuffs_base__make_slice_u8(self->private_data.f_mtft, v_child_ff));
      self->private_data.f_mtft[0u] = ((uint8_t)(v_output));
      self->private_data.f_letter_counts[v_output] += 1u;
      self->private_data.f_bwt[v_block_size] = v_output;
      if (v_block_size >= self->private_impl.f_max_incl_block_size) {
        status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_length);
        goto exit;
      }
      v_block_size += 1u;
      v_run_shift = 0u;
      continue;
    } else if (v_child == 768u) {
      self->private_impl.f_decode_huffman_finished = true;
      break;
    }
    if (v_run_shift >= 23u) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_length);
      goto exit;
    }
    v_run = ((((uint32_t)(v_child)) & 3u) << v_run_shift);
    v_run_shift += 1u;
    v_i = v_block_size;
    v_j = (v_run + v_block_size);
    if (v_j > self->private_impl.f_max_incl_block_size) {
      status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_length);
      goto exit;
    }
    v_block_size = v_j;
    v_mtft0 = ((uint32_t)(self->private_data.f_mtft[0u]));
    self->private_data.f_letter_counts[v_mtft0] += v_run;
    while (v_i < v_j) {
      self->private_data.f_bwt[v_i] = v_mtft0;
      v_i += 1u;
    }
  }
  self->private_impl.f_bits = v_bits;
  self->private_impl.f_n_bits = v_n_bits;
  self->private_impl.f_block_size = v_block_size;
  self->private_impl.f_decode_huffman_which = v_which;
  self->private_impl.f_decode_huffman_ticks = v_ticks;
  self->private_impl.f_decode_huffman_section = v_section;
  self->private_impl.f_decode_huffman_run_shift = v_run_shift;
  status = wuffs_base__make_status(NULL);
  goto ok;

  ok:
  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func bzip2.decoder.decode_huffman_slow

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_bzip2__decoder__decode_huffman_slow(
    wuffs_bzip2__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_node_index = 0;
  uint16_t v_child = 0;
  uint32_t v_child_ff = 0;
  uint32_t v_i = 0;
  uint32_t v_j = 0;
  uint32_t v_output = 0;
  uint32_t v_run = 0;
  uint32_t v_mtft0 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_huffman_slow;
  if (coro_susp_point) {
    v_node_index = self->private_data.s_decode_huffman_slow.v_node_index;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while ( ! (self->private_impl.p_decode_huffman_slow != 0)) {
      if (self->private_impl.f_decode_huffman_ticks > 0u) {
        self->private_impl.f_decode_huffman_ticks -= 1u;
      } else {
        self->private_impl.f_decode_huffman_ticks = 49u;
        self->private_impl.f_decode_huffman_section += 1u;
        if (self->private_impl.f_decode_huffman_section >= self->private_impl.f_num_sections) {
          status = wuffs_base__make_status(wuffs_bzip2__error__bad_number_of_sections);
          goto exit;
        }
        self->private_impl.f_decode_huffman_which = WUFFS_BZIP2__CLAMP_TO_5[((uint8_t)(self->private_data.f_huffman_selectors[(self->private_impl.f_decode_huffman_section & 32767u)] & 7u))];
      }
      v_node_index = 0u;
      while (true) {
        if (self->private_impl.f_n_bits <= 0u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_0 = *iop_a_src++;
            v_c8 = t_0;
          }
          self->private_impl.f_bits = (((uint32_t)(v_c8)) << 24u);
          self->private_impl.f_n_bits = 8u;
        }
        v_child = self->private_data.f_huffman_trees[self->private_impl.f_decode_huffman_which][v_node_index][(self->private_impl.f_bits >> 31u)];
        self->private_impl.f_bits <<= 1u;
        self->private_impl.f_n_bits -= 1u;
        if (v_child < 257u) {
          v_node_index = ((uint32_t)(v_child));
          continue;
        } else if (v_child < 768u) {
          v_child_ff = ((uint32_t)(((uint16_t)(v_child & 255u))));
          v_output = ((uint32_t)(self->private_data.f_mtft[v_child_ff]));
          wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8_ij(self->private_data.f_mtft, 1, (1u + v_child_ff)), wuffs_base__make_slice_u8(self->private_data.f_mtft, v_child_ff));
          self->private_data.f_mtft[0u] = ((uint8_t)(v_output));
          self->private_data.f_letter_counts[v_output] += 1u;
          self->private_data.f_bwt[self->private_impl.f_block_size] = v_output;
          if (self->private_impl.f_block_size >= self->private_impl.f_max_incl_block_size) {
            status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_length);
            goto exit;
          }
          self->private_impl.f_block_size += 1u;
          self->private_impl.f_decode_huffman_run_shift = 0u;
          break;
        } else if (v_child == 768u) {
          self->private_impl.f_decode_huffman_finished = true;
          goto label__outer__break;
        }
        if (self->private_impl.f_decode_huffman_run_shift >= 23u) {
          status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_length);
          goto exit;
        }
        v_run = ((((uint32_t)(v_child)) & 3u) << self->private_impl.f_decode_huffman_run_shift);
        self->private_impl.f_decode_huffman_run_shift += 1u;
        v_i = self->private_impl.f_block_size;
        v_j = (v_run + self->private_impl.f_block_size);
        if (v_j > self->private_impl.f_max_incl_block_size) {
          status = wuffs_base__make_status(wuffs_bzip2__error__bad_block_length);
          goto exit;
        }
        self->private_impl.f_block_size = v_j;
        v_mtft0 = ((uint32_t)(self->private_data.f_mtft[0u]));
        self->private_data.f_letter_counts[v_mtft0] += v_run;
        while (v_i < v_j) {
          self->private_data.f_bwt[v_i] = v_mtft0;
          v_i += 1u;
        }
        break;
      }
    }
    label__outer__break:;

    goto ok;
    ok:
    self->private_impl.p_decode_huffman_slow = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_huffman_slow = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_huffman_slow.v_node_index = v_node_index;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BZIP2)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CBOR)

// ---------------- Status Codes Implementations

const char wuffs_cbor__error__bad_input[] = "#cbor: bad input";
const char wuffs_cbor__error__unsupported_recursion_depth[] = "#cbor: unsupported recursion depth";
const char wuffs_cbor__error__internal_error_inconsistent_i_o[] = "#cbor: internal error: inconsistent I/O";
const char wuffs_cbor__error__internal_error_inconsistent_token_length[] = "#cbor: internal error: inconsistent token length";

// ---------------- Private Consts

static const uint32_t
WUFFS_CBOR__LITERALS[4] WUFFS_BASE__POTENTIALLY_UNUSED = {
  8388612u, 8388616u, 8388610u, 8388609u,
};

static const uint8_t
WUFFS_CBOR__TOKEN_LENGTHS[32] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u,
  1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u,
  1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u,
  2u, 3u, 5u, 9u, 0u, 0u, 0u, 1u,
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

// ---------------- VTables

const wuffs_base__token_decoder__func_ptrs
wuffs_cbor__decoder__func_ptrs_for__wuffs_base__token_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__token_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_cbor__decoder__decode_tokens),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_cbor__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_cbor__decoder__set_quirk),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_cbor__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_cbor__decoder__initialize(
    wuffs_cbor__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__token_decoder.vtable_name =
      wuffs_base__token_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__token_decoder.function_pointers =
      (const void*)(&wuffs_cbor__decoder__func_ptrs_for__wuffs_base__token_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_cbor__decoder*
wuffs_cbor__decoder__alloc(void) {
  wuffs_cbor__decoder* x =
      (wuffs_cbor__decoder*)(calloc(1, sizeof(wuffs_cbor__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_cbor__decoder__initialize(
      x, sizeof(wuffs_cbor__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_cbor__decoder(void) {
  return sizeof(wuffs_cbor__decoder);
}

// ---------------- Function Implementations

// -------- func cbor.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_cbor__decoder__get_quirk(
    const wuffs_cbor__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func cbor.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_cbor__decoder__set_quirk(
    wuffs_cbor__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func cbor.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_cbor__decoder__workbuf_len(
    const wuffs_cbor__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__empty_range_ii_u64();
}

// -------- func cbor.decoder.decode_tokens

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_cbor__decoder__decode_tokens(
    wuffs_cbor__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_string_length = 0;
  uint64_t v_n64 = 0;
  uint32_t v_depth = 0;
  uint32_t v_stack_byte = 0;
  uint32_t v_stack_bit = 0;
  uint32_t v_stack_val = 0;
  uint32_t v_token_length = 0;
  uint32_t v_vminor = 0;
  uint32_t v_vminor_alt = 0;
  uint32_t v_continued = 0;
  uint8_t v_c8 = 0;
  uint8_t v_c_major = 0;
  uint8_t v_c_minor = 0;
  bool v_tagged = false;
  uint8_t v_indefinite_string_major_type = 0;

  wuffs_base__token* iop_a_dst = NULL;
  wuffs_base__token* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_tokens;
  if (coro_susp_point) {
    v_string_length = self->private_data.s_decode_tokens.v_string_length;
    v_depth = self->private_data.s_decode_tokens.v_depth;
    v_tagged = self->private_data.s_decode_tokens.v_tagged;
    v_indefinite_string_major_type = self->private_data.s_decode_tokens.v_indefinite_string_major_type;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_end_of_data) {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    label__outer__continue:;
    while (true) {
      while (true) {
        do {
          if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 1u) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_write);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
            goto label__outer__continue;
          }
          if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
            if (a_src && a_src->meta.closed) {
              status = wuffs_base__make_status(wuffs_cbor__error__bad_input);
              goto exit;
            }
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
            goto label__outer__continue;
          }
          v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          if ((v_indefinite_string_major_type != 0u) && (v_indefinite_string_major_type != ((uint8_t)(v_c8 >> 5u)))) {
            if (v_c8 != 255u) {
              status = wuffs_base__make_status(wuffs_cbor__error__bad_input);
              goto exit;
            }
            v_vminor = 4194560u;
            if (v_indefinite_string_major_type == 3u) {
              v_vminor |= 19u;
            }
            v_indefinite_string_major_type = 0u;
            iop_a_src += 1u;
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(v_vminor)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            goto label__goto_parsed_a_leaf_value__break;
          }
          iop_a_src += 1u;
          v_c_major = ((uint8_t)(((uint8_t)(v_c8 >> 5u))));
          v_c_minor = ((uint8_t)(v_c8 & 31u));
          if (v_c_minor < 24u) {
            v_string_length = ((uint64_t)(v_c_minor));
          } else {
            while (true) {
              if (v_c_minor == 24u) {
                if (((uint64_t)(io2_a_src - iop_a_src)) >= 1u) {
                  v_string_length = ((uint64_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src)));
                  iop_a_src += 1u;
                  break;
                }
              } else if (v_c_minor == 25u) {
                if (((uint64_t)(io2_a_src - iop_a_src)) >= 2u) {
                  v_string_length = ((uint64_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
                  iop_a_src += 2u;
                  break;
                }
              } else if (v_c_minor == 26u) {
                if (((uint64_t)(io2_a_src - iop_a_src)) >= 4u) {
                  v_string_length = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
                  iop_a_src += 4u;
                  break;
                }
              } else if (v_c_minor == 27u) {
                if (((uint64_t)(io2_a_src - iop_a_src)) >= 8u) {
                  v_string_length = wuffs_base__peek_u64be__no_bounds_check(iop_a_src);
                  iop_a_src += 8u;
                  break;
                }
              } else {
                v_string_length = 0u;
                break;
              }
              if (iop_a_src > io1_a_src) {
                iop_a_src--;
                if (a_src && a_src->meta.closed) {
                  status = wuffs_base__make_status(wuffs_cbor__error__bad_input);
                  goto exit;
                }
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
                goto label__outer__continue;
              }
              status = wuffs_base__make_status(wuffs_cbor__error__internal_error_inconsistent_i_o);
              goto exit;
            }
          }
          if (v_c_major == 0u) {
            if (v_c_minor < 26u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)((14680064u | ((uint32_t)((v_string_length & 65535u)))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            } else if (v_c_minor < 28u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)((14680064u | ((uint32_t)((v_string_length >> 46u)))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                  (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              *iop_a_dst++ = wuffs_base__make_token(
                  (~(v_string_length & 70368744177663u) << WUFFS_BASE__TOKEN__VALUE_EXTENSION__SHIFT) |
                  (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            }
          } else if (v_c_major == 1u) {
            if (v_c_minor < 26u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)((12582912u | (2097151u - ((uint32_t)((v_string_length & 65535u))))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            } else if (v_c_minor < 28u) {
              if (v_string_length < 9223372036854775808u) {
                *iop_a_dst++ = wuffs_base__make_token(
                    (((uint64_t)((12582912u | (2097151u - ((uint32_t)((v_string_length >> 46u))))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                    (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                    (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                *iop_a_dst++ = wuffs_base__make_token(
                    (~((18446744073709551615u - v_string_length) & 70368744177663u) << WUFFS_BASE__TOKEN__VALUE_EXTENSION__SHIFT) |
                    (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              } else {
                *iop_a_dst++ = wuffs_base__make_token(
                    (((uint64_t)(731642u)) << WUFFS_BASE__TOKEN__VALUE_MAJOR__SHIFT) |
                    (((uint64_t)(16777216u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                    (((uint64_t)(9u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              }
              goto label__goto_parsed_a_leaf_value__break;
            }
          } else if (v_c_major == 2u) {
            if (v_c_minor < 28u) {
              if (v_string_length == 0u) {
                *iop_a_dst++ = wuffs_base__make_token(
                    (((uint64_t)(4194560u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                    (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                goto label__goto_parsed_a_leaf_value__break;
              }
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(4194560u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                  (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            } else if (v_c_minor == 31u) {
              if (v_indefinite_string_major_type != 0u) {
                break;
              }
              v_indefinite_string_major_type = 2u;
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(4194560u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__outer__continue;
            } else {
              break;
            }
            while (true) {
              if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_write);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4);
                continue;
              }
              v_n64 = wuffs_base__u64__min(v_string_length, ((uint64_t)(io2_a_src - iop_a_src)));
              v_token_length = ((uint32_t)((v_n64 & 65535u)));
              if (v_n64 > 65535u) {
                v_token_length = 65535u;
              } else if (v_token_length <= 0u) {
                if (a_src && a_src->meta.closed) {
                  status = wuffs_base__make_status(wuffs_cbor__error__bad_input);
                  goto exit;
                }
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
                continue;
              }
              if (((uint64_t)(io2_a_src - iop_a_src)) < ((uint64_t)(v_token_length))) {
                status = wuffs_base__make_status(wuffs_cbor__error__internal_error_inconsistent_token_length);
                goto exit;
              }
              v_string_length -= ((uint64_t)(v_token_length));
              v_continued = 0u;
              if ((v_string_length > 0u) || (v_indefinite_string_major_type > 0u)) {
                v_continued = 1u;
              }
              iop_a_src += v_token_length;
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(4194816u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(v_continued)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                  (((uint64_t)(v_token_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              if (v_string_length > 0u) {
                continue;
              } else if (v_indefinite_string_major_type > 0u) {
                goto label__outer__continue;
              }
              goto label__goto_parsed_a_leaf_value__break;
            }
          } else if (v_c_major == 3u) {
            if (v_c_minor < 28u) {
              if (v_string_length == 0u) {
                *iop_a_dst++ = wuffs_base__make_token(
                    (((uint64_t)(4194579u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                    (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                goto label__goto_parsed_a_leaf_value__break;
              }
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(4194579u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                  (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            } else if (v_c_minor == 31u) {
              if (v_indefinite_string_major_type != 0u) {
                break;
              }
              v_indefinite_string_major_type = 3u;
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(4194579u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__outer__continue;
            } else {
              break;
            }
            while (true) {
              if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_write);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(6);
                continue;
              }
              v_n64 = wuffs_base__u64__min(v_string_length, 65535u);
              v_n64 = ((uint64_t)(wuffs_base__utf_8__longest_valid_prefix(iop_a_src,
                  ((size_t)(wuffs_base__u64__min(((uint64_t)(io2_a_src - iop_a_src)), v_n64))))));
              v_token_length = ((uint32_t)((v_n64 & 65535u)));
              if (v_token_length <= 0u) {
                if ((a_src && a_src->meta.closed) || (((uint64_t)(io2_a_src - iop_a_src)) >= 4u)) {
                  status = wuffs_base__make_status(wuffs_cbor__error__bad_input);
                  goto exit;
                }
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(7);
                continue;
              }
              if (((uint64_t)(io2_a_src - iop_a_src)) < ((uint64_t)(v_token_length))) {
                status = wuffs_base__make_status(wuffs_cbor__error__internal_error_inconsistent_token_length);
                goto exit;
              }
              v_string_length -= ((uint64_t)(v_token_length));
              v_continued = 0u;
              if ((v_string_length > 0u) || (v_indefinite_string_major_type > 0u)) {
                v_continued = 1u;
              }
              iop_a_src += v_token_length;
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(v_continued)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                  (((uint64_t)(v_token_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              if (v_string_length > 0u) {
                continue;
              } else if (v_indefinite_string_major_type > 0u) {
                goto label__outer__continue;
              }
              goto label__goto_parsed_a_leaf_value__break;
            }
          } else if (v_c_major == 4u) {
            if (WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor] == 0u) {
              break;
            } else if (v_depth >= 1024u) {
              v_token_length = ((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor]));
              while ((v_token_length > 0u) && (iop_a_src > io1_a_src)) {
                iop_a_src--;
                v_token_length -= 1u;
              }
              status = wuffs_base__make_status(wuffs_cbor__error__unsupported_recursion_depth);
              goto exit;
            }
            v_vminor = 2105361u;
            v_vminor_alt = 2101282u;
            if (v_depth > 0u) {
              v_stack_byte = ((v_depth - 1u) / 16u);
              v_stack_bit = (((v_depth - 1u) & 15u) * 2u);
              if (0u == (self->private_data.f_stack[v_stack_byte] & (((uint32_t)(1u)) << v_stack_bit))) {
                v_vminor = 2105377u;
                v_vminor_alt = 2105378u;
              } else {
                v_vminor = 2105409u;
                v_vminor_alt = 2113570u;
              }
            }
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(v_vminor)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            if (v_c_minor == 0u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(v_vminor_alt)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            }
            v_stack_byte = (v_depth / 16u);
            v_stack_bit = ((v_depth & 15u) * 2u);
            self->private_data.f_stack[v_stack_byte] &= (4294967295u ^ (((uint32_t)(3u)) << v_stack_bit));
            self->private_data.f_container_num_remaining[v_depth] = v_string_length;
            v_depth += 1u;
            v_tagged = false;
            goto label__outer__continue;
          } else if (v_c_major == 5u) {
            if (WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor] == 0u) {
              break;
            } else if (v_depth >= 1024u) {
              v_token_length = ((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor]));
              while ((v_token_length > 0u) && (iop_a_src > io1_a_src)) {
                iop_a_src--;
                v_token_length -= 1u;
              }
              status = wuffs_base__make_status(wuffs_cbor__error__unsupported_recursion_depth);
              goto exit;
            }
            v_vminor = 2113553u;
            v_vminor_alt = 2101314u;
            if (v_depth > 0u) {
              v_stack_byte = ((v_depth - 1u) / 16u);
              v_stack_bit = (((v_depth - 1u) & 15u) * 2u);
              if (0u == (self->private_data.f_stack[v_stack_byte] & (((uint32_t)(1u)) << v_stack_bit))) {
                v_vminor = 2113569u;
                v_vminor_alt = 2105410u;
              } else {
                v_vminor = 2113601u;
                v_vminor_alt = 2113602u;
              }
            }
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(v_vminor)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            if (v_c_minor == 0u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(v_vminor_alt)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            }
            v_stack_byte = (v_depth / 16u);
            v_stack_bit = ((v_depth & 15u) * 2u);
            self->private_data.f_stack[v_stack_byte] |= (((uint32_t)(3u)) << v_stack_bit);
            self->private_data.f_container_num_remaining[v_depth] = v_string_length;
            v_depth += 1u;
            v_tagged = false;
            goto label__outer__continue;
          } else if (v_c_major == 6u) {
            if (v_c_minor >= 28u) {
              break;
            }
            if (v_string_length < 262144u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(731642u)) << WUFFS_BASE__TOKEN__VALUE_MAJOR__SHIFT) |
                  (((uint64_t)((4194304u | ((uint32_t)(v_string_length))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            } else {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(731642u)) << WUFFS_BASE__TOKEN__VALUE_MAJOR__SHIFT) |
                  (((uint64_t)((4194304u | ((uint32_t)((v_string_length >> 46u)))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                  (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              *iop_a_dst++ = wuffs_base__make_token(
                  (~(v_string_length & 70368744177663u) << WUFFS_BASE__TOKEN__VALUE_EXTENSION__SHIFT) |
                  (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            }
            v_tagged = true;
            goto label__outer__continue;
          } else if (v_c_major == 7u) {
            if (v_c_minor < 20u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(731642u)) << WUFFS_BASE__TOKEN__VALUE_MAJOR__SHIFT) |
                  (((uint64_t)((8388608u | ((uint32_t)((v_string_length & 255u)))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            } else if (v_c_minor < 24u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(WUFFS_CBOR__LITERALS[((uint8_t)(v_c_minor & 3u))])) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            } else if (v_c_minor == 24u) {
              if (v_string_length < 24u) {
                if ( ! (iop_a_src > io1_a_src)) {
                  status = wuffs_base__make_status(wuffs_cbor__error__internal_error_inconsistent_i_o);
                  goto exit;
                }
                iop_a_src--;
                break;
              }
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(731642u)) << WUFFS_BASE__TOKEN__VALUE_MAJOR__SHIFT) |
                  (((uint64_t)((8388608u | ((uint32_t)((v_string_length & 255u)))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(2u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            } else if (v_c_minor < 28u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(10490113u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(((uint32_t)(WUFFS_CBOR__TOKEN_LENGTHS[v_c_minor])))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            } else if (v_c_minor == 31u) {
              if (v_tagged || (v_depth <= 0u)) {
                break;
              }
              v_depth -= 1u;
              if (self->private_data.f_container_num_remaining[v_depth] != 0u) {
                break;
              }
              v_stack_byte = (v_depth / 16u);
              v_stack_bit = ((v_depth & 15u) * 2u);
              v_stack_val = (3u & (self->private_data.f_stack[v_stack_byte] >> v_stack_bit));
              if (v_stack_val == 1u) {
                break;
              }
              if (v_stack_val != 3u) {
                v_vminor_alt = 2097186u;
              } else {
                v_vminor_alt = 2097218u;
              }
              if (v_depth <= 0u) {
                v_vminor_alt |= 4096u;
              } else {
                v_stack_byte = ((v_depth - 1u) / 16u);
                v_stack_bit = (((v_depth - 1u) & 15u) * 2u);
                if (0u == (self->private_data.f_stack[v_stack_byte] & (((uint32_t)(1u)) << v_stack_bit))) {
                  v_vminor_alt |= 8192u;
                } else {
                  v_vminor_alt |= 16384u;
                }
              }
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(v_vminor_alt)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              goto label__goto_parsed_a_leaf_value__break;
            }
          }
        } while (0);
        if (iop_a_src > io1_a_src) {
          iop_a_src--;
          status = wuffs_base__make_status(wuffs_cbor__error__bad_input);
          goto exit;
        }
        status = wuffs_base__make_status(wuffs_cbor__error__internal_error_inconsistent_i_o);
        goto exit;
      }
      label__goto_parsed_a_leaf_value__break:;
      v_tagged = false;
      while (v_depth > 0u) {
        v_stack_byte = ((v_depth - 1u) / 16u);
        v_stack_bit = (((v_depth - 1u) & 15u) * 2u);
        self->private_data.f_stack[v_stack_byte] ^= (((uint32_t)(1u)) << (v_stack_bit + 1u));
        if (1u == (3u & (self->private_data.f_stack[v_stack_byte] >> v_stack_bit))) {
          goto label__outer__continue;
        }
        if (self->private_data.f_container_num_remaining[(v_depth - 1u)] <= 0u) {
          goto label__outer__continue;
        }
        self->private_data.f_container_num_remaining[(v_depth - 1u)] -= 1u;
        if (self->private_data.f_container_num_remaining[(v_depth - 1u)] > 0u) {
          goto label__outer__continue;
        }
        while (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_write);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(8);
          continue;
        }
        v_depth -= 1u;
        v_stack_byte = (v_depth / 16u);
        v_stack_bit = ((v_depth & 15u) * 2u);
        if (0u == (self->private_data.f_stack[v_stack_byte] & (((uint32_t)(1u)) << v_stack_bit))) {
          v_vminor_alt = 2097186u;
        } else {
          v_vminor_alt = 2097218u;
        }
        if (v_depth <= 0u) {
          v_vminor_alt |= 4096u;
        } else {
          v_stack_byte = ((v_depth - 1u) / 16u);
          v_stack_bit = (((v_depth - 1u) & 15u) * 2u);
          if (0u == (self->private_data.f_stack[v_stack_byte] & (((uint32_t)(1u)) << v_stack_bit))) {
            v_vminor_alt |= 8192u;
          } else {
            v_vminor_alt |= 16384u;
          }
        }
        *iop_a_dst++ = wuffs_base__make_token(
            (((uint64_t)(v_vminor_alt)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
            (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
      }
      break;
    }
    self->private_impl.f_end_of_data = true;

    ok:
    self->private_impl.p_decode_tokens = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_tokens = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;
  self->private_data.s_decode_tokens.v_string_length = v_string_length;
  self->private_data.s_decode_tokens.v_depth = v_depth;
  self->private_data.s_decode_tokens.v_tagged = v_tagged;
  self->private_data.s_decode_tokens.v_indefinite_string_major_type = v_indefinite_string_major_type;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CBOR)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CRC32)

// ---------------- Status Codes Implementations

// ---------------- Private Consts

static const uint32_t
WUFFS_CRC32__IEEE_TABLE[16][256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  {
    0u, 1996959894u, 3993919788u, 2567524794u, 124634137u, 1886057615u, 3915621685u, 2657392035u,
    249268274u, 2044508324u, 3772115230u, 2547177864u, 162941995u, 2125561021u, 3887607047u, 2428444049u,
    498536548u, 1789927666u, 4089016648u, 2227061214u, 450548861u, 1843258603u, 4107580753u, 2211677639u,
    325883990u, 1684777152u, 4251122042u, 2321926636u, 335633487u, 1661365465u, 4195302755u, 2366115317u,
    997073096u, 1281953886u, 3579855332u, 2724688242u, 1006888145u, 1258607687u, 3524101629u, 2768942443u,
    901097722u, 1119000684u, 3686517206u, 2898065728u, 853044451u, 1172266101u, 3705015759u, 2882616665u,
    651767980u, 1373503546u, 3369554304u, 3218104598u, 565507253u, 1454621731u, 3485111705u, 3099436303u,
    671266974u, 1594198024u, 3322730930u, 2970347812u, 795835527u, 1483230225u, 3244367275u, 3060149565u,
    1994146192u, 31158534u, 2563907772u, 4023717930u, 1907459465u, 112637215u, 2680153253u, 3904427059u,
    2013776290u, 251722036u, 2517215374u, 3775830040u, 2137656763u, 141376813u, 2439277719u, 3865271297u,
    1802195444u, 476864866u, 2238001368u, 4066508878u, 1812370925u, 453092731u, 2181625025u, 4111451223u,
    1706088902u, 314042704u, 2344532202u, 4240017532u, 1658658271u, 366619977u, 2362670323u, 4224994405u,
    1303535960u, 984961486u, 2747007092u, 3569037538u, 1256170817u, 1037604311u, 2765210733u, 3554079995u,
    1131014506u, 879679996u, 2909243462u, 3663771856u, 1141124467u, 855842277u, 2852801631u, 3708648649u,
    1342533948u, 654459306u, 3188396048u, 3373015174u, 1466479909u, 544179635u, 3110523913u, 3462522015u,
    1591671054u, 702138776u, 2966460450u, 3352799412u, 1504918807u, 783551873u, 3082640443u, 3233442989u,
    3988292384u, 2596254646u, 62317068u, 1957810842u, 3939845945u, 2647816111u, 81470997u, 1943803523u,
    3814918930u, 2489596804u, 225274430u, 2053790376u, 3826175755u, 2466906013u, 167816743u, 2097651377u,
    4027552580u, 2265490386u, 503444072u, 1762050814u, 4150417245u, 2154129355u, 426522225u, 1852507879u,
    4275313526u, 2312317920u, 282753626u, 1742555852u, 4189708143u, 2394877945u, 397917763u, 1622183637u,
    3604390888u, 2714866558u, 953729732u, 1340076626u, 3518719985u, 2797360999u, 1068828381u, 1219638859u,
    3624741850u, 2936675148u, 906185462u, 1090812512u, 3747672003u, 2825379669u, 829329135u, 1181335161u,
    3412177804u, 3160834842u, 628085408u, 1382605366u, 3423369109u, 3138078467u, 570562233u, 1426400815u,
    3317316542u, 2998733608u, 733239954u, 1555261956u, 3268935591u, 3050360625u, 752459403u, 1541320221u,
    2607071920u, 3965973030u, 1969922972u, 40735498u, 2617837225u, 3943577151u, 1913087877u, 83908371u,
    2512341634u, 3803740692u, 2075208622u, 213261112u, 2463272603u, 3855990285u, 2094854071u, 198958881u,
    2262029012u, 4057260610u, 1759359992u, 534414190u, 2176718541u, 4139329115u, 1873836001u, 414664567u,
    2282248934u, 4279200368u, 1711684554u, 285281116u, 2405801727u, 4167216745u, 1634467795u, 376229701u,
    2685067896u, 3608007406u, 1308918612u, 956543938u, 2808555105u, 3495958263u, 1231636301u, 1047427035u,
    2932959818u, 3654703836u, 1088359270u, 936918000u, 2847714899u, 3736837829u, 1202900863u, 817233897u,
    3183342108u, 3401237130u, 1404277552u, 615818150u, 3134207493u, 3453421203u, 1423857449u, 601450431u,
    3009837614u, 3294710456u, 1567103746u, 711928724u, 3020668471u, 3272380065u, 1510334235u, 755167117u,
  }, {
    0u, 421212481u, 842424962u, 724390851u, 1684849924u, 2105013317u, 1448781702u, 1329698503u,
    3369699848u, 3519200073u, 4210026634u, 3824474571u, 2897563404u, 3048111693u, 2659397006u, 2274893007u,
    1254232657u, 1406739216u, 2029285587u, 1643069842u, 783210325u, 934667796u, 479770071u, 92505238u,
    2182846553u, 2600511768u, 2955803355u, 2838940570u, 3866582365u, 4285295644u, 3561045983u, 3445231262u,
    2508465314u, 2359236067u, 2813478432u, 3198777185u, 4058571174u, 3908292839u, 3286139684u, 3670389349u,
    1566420650u, 1145479147u, 1869335592u, 1987116393u, 959540142u, 539646703u, 185010476u, 303839341u,
    3745920755u, 3327985586u, 3983561841u, 4100678960u, 3140154359u, 2721170102u, 2300350837u, 2416418868u,
    396344571u, 243568058u, 631889529u, 1018359608u, 1945336319u, 1793607870u, 1103436669u, 1490954812u,
    4034481925u, 3915546180u, 3259968903u, 3679722694u, 2484439553u, 2366552896u, 2787371139u, 3208174018u,
    950060301u, 565965900u, 177645455u, 328046286u, 1556873225u, 1171730760u, 1861902987u, 2011255754u,
    3132841300u, 2745199637u, 2290958294u, 2442530455u, 3738671184u, 3352078609u, 3974232786u, 4126854035u,
    1919080284u, 1803150877u, 1079293406u, 1498383519u, 370020952u, 253043481u, 607678682u, 1025720731u,
    1711106983u, 2095471334u, 1472923941u, 1322268772u, 26324643u, 411738082u, 866634785u, 717028704u,
    2904875439u, 3024081134u, 2668790573u, 2248782444u, 3376948395u, 3495106026u, 4219356713u, 3798300520u,
    792689142u, 908347575u, 487136116u, 68299317u, 1263779058u, 1380486579u, 2036719216u, 1618931505u,
    3890672638u, 4278043327u, 3587215740u, 3435896893u, 2206873338u, 2593195963u, 2981909624u, 2829542713u,
    998479947u, 580430090u, 162921161u, 279890824u, 1609522511u, 1190423566u, 1842954189u, 1958874764u,
    4082766403u, 3930137346u, 3245109441u, 3631694208u, 2536953671u, 2385372678u, 2768287173u, 3155920004u,
    1900120602u, 1750776667u, 1131931800u, 1517083097u, 355290910u, 204897887u, 656092572u, 1040194781u,
    3113746450u, 2692952403u, 2343461520u, 2461357009u, 3723805974u, 3304059991u, 4022511508u, 4141455061u,
    2919742697u, 3072101800u, 2620513899u, 2234183466u, 3396041197u, 3547351212u, 4166851439u, 3779471918u,
    1725839073u, 2143618976u, 1424512099u, 1307796770u, 45282277u, 464110244u, 813994343u, 698327078u,
    3838160568u, 4259225593u, 3606301754u, 3488152955u, 2158586812u, 2578602749u, 2996767038u, 2877569151u,
    740041904u, 889656817u, 506086962u, 120682355u, 1215357364u, 1366020341u, 2051441462u, 1667084919u,
    3422213966u, 3538019855u, 4190942668u, 3772220557u, 2945847882u, 3062702859u, 2644537544u, 2226864521u,
    52649286u, 439905287u, 823476164u, 672009861u, 1733269570u, 2119477507u, 1434057408u, 1281543041u,
    2167981343u, 2552493150u, 3004082077u, 2853541596u, 3847487515u, 4233048410u, 3613549209u, 3464057816u,
    1239502615u, 1358593622u, 2077699477u, 1657543892u, 764250643u, 882293586u, 532408465u, 111204816u,
    1585378284u, 1197851309u, 1816695150u, 1968414767u, 974272232u, 587794345u, 136598634u, 289367339u,
    2527558116u, 2411481253u, 2760973158u, 3179948583u, 4073438432u, 3956313505u, 3237863010u, 3655790371u,
    347922877u, 229101820u, 646611775u, 1066513022u, 1892689081u, 1774917112u, 1122387515u, 1543337850u,
    3697634229u, 3313392372u, 3998419255u, 4148705398u, 3087642289u, 2702352368u, 2319436851u, 2468674930u,
  }, {
    0u, 29518391u, 59036782u, 38190681u, 118073564u, 114017003u, 76381362u, 89069189u,
    236147128u, 265370511u, 228034006u, 206958561u, 152762724u, 148411219u, 178138378u, 190596925u,
    472294256u, 501532999u, 530741022u, 509615401u, 456068012u, 451764635u, 413917122u, 426358261u,
    305525448u, 334993663u, 296822438u, 275991697u, 356276756u, 352202787u, 381193850u, 393929805u,
    944588512u, 965684439u, 1003065998u, 973863097u, 1061482044u, 1049003019u, 1019230802u, 1023561829u,
    912136024u, 933002607u, 903529270u, 874031361u, 827834244u, 815125939u, 852716522u, 856752605u,
    611050896u, 631869351u, 669987326u, 640506825u, 593644876u, 580921211u, 551983394u, 556069653u,
    712553512u, 733666847u, 704405574u, 675154545u, 762387700u, 749958851u, 787859610u, 792175277u,
    1889177024u, 1901651959u, 1931368878u, 1927033753u, 2006131996u, 1985040171u, 1947726194u, 1976933189u,
    2122964088u, 2135668303u, 2098006038u, 2093965857u, 2038461604u, 2017599123u, 2047123658u, 2076625661u,
    1824272048u, 1836991623u, 1866005214u, 1861914857u, 1807058540u, 1786244187u, 1748062722u, 1777547317u,
    1655668488u, 1668093247u, 1630251878u, 1625932113u, 1705433044u, 1684323811u, 1713505210u, 1742760333u,
    1222101792u, 1226154263u, 1263738702u, 1251046777u, 1339974652u, 1310460363u, 1281013650u, 1301863845u,
    1187289752u, 1191637167u, 1161842422u, 1149379777u, 1103966788u, 1074747507u, 1112139306u, 1133218845u,
    1425107024u, 1429406311u, 1467333694u, 1454888457u, 1408811148u, 1379576507u, 1350309090u, 1371438805u,
    1524775400u, 1528845279u, 1499917702u, 1487177649u, 1575719220u, 1546255107u, 1584350554u, 1605185389u,
    3778354048u, 3774312887u, 3803303918u, 3816007129u, 3862737756u, 3892238699u, 3854067506u, 3833203973u,
    4012263992u, 4007927823u, 3970080342u, 3982554209u, 3895452388u, 3924658387u, 3953866378u, 3932773565u,
    4245928176u, 4241609415u, 4271336606u, 4283762345u, 4196012076u, 4225268251u, 4187931714u, 4166823541u,
    4076923208u, 4072833919u, 4035198246u, 4047918865u, 4094247316u, 4123732899u, 4153251322u, 4132437965u,
    3648544096u, 3636082519u, 3673983246u, 3678331705u, 3732010428u, 3753090955u, 3723829714u, 3694611429u,
    3614117080u, 3601426159u, 3572488374u, 3576541825u, 3496125444u, 3516976691u, 3555094634u, 3525581405u,
    3311336976u, 3298595879u, 3336186494u, 3340255305u, 3260503756u, 3281337595u, 3251864226u, 3222399125u,
    3410866088u, 3398419871u, 3368647622u, 3372945905u, 3427010420u, 3448139075u, 3485520666u, 3456284973u,
    2444203584u, 2423127159u, 2452308526u, 2481530905u, 2527477404u, 2539934891u, 2502093554u, 2497740997u,
    2679949304u, 2659102159u, 2620920726u, 2650438049u, 2562027300u, 2574714131u, 2603727690u, 2599670141u,
    2374579504u, 2353749767u, 2383274334u, 2412743529u, 2323684844u, 2336421851u, 2298759554u, 2294686645u,
    2207933576u, 2186809023u, 2149495014u, 2178734801u, 2224278612u, 2236720739u, 2266437690u, 2262135309u,
    2850214048u, 2820717207u, 2858812622u, 2879680249u, 2934667388u, 2938704459u, 2909776914u, 2897069605u,
    2817622296u, 2788420399u, 2759153014u, 2780249921u, 2700618180u, 2704950259u, 2742877610u, 2730399645u,
    3049550800u, 3020298727u, 3057690558u, 3078802825u, 2999835404u, 3004150075u, 2974355298u, 2961925461u,
    3151438440u, 3121956959u, 3092510214u, 3113327665u, 3168701108u, 3172786307u, 3210370778u, 3197646061u,
  }, {
    0u, 3099354981u, 2852767883u, 313896942u, 2405603159u, 937357362u, 627793884u, 2648127673u,
    3316918511u, 2097696650u, 1874714724u, 3607201537u, 1255587768u, 4067088605u, 3772741427u, 1482887254u,
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  }, {
    0u, 3120290792u, 2827399569u, 293431929u, 2323408227u, 864534155u, 586863858u, 2600537882u,
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    1222322711u, 4045468159u, 3764231046u, 1504067694u, 3265744756u, 2069664924u, 1780612837u, 3554288909u,
    2270357136u, 1051278712u, 802445057u, 2519698665u, 221152243u, 3033880603u, 2779263586u, 475261322u,
  }, {
    0u, 2926088593u, 2275419491u, 701019378u, 3560000647u, 2052709654u, 1402038756u, 4261017717u,
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    2207997677u, 770953084u, 71007118u, 2857626143u, 1470763626u, 4190274555u, 3490330377u, 2120394392u,
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  },
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__up(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__up__choosy_default(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x);

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_CRC32)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__up_arm_crc32(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_CRC32)

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__up_x86_sse42(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)

// ---------------- VTables

const wuffs_base__hasher_u32__func_ptrs
wuffs_crc32__ieee_hasher__func_ptrs_for__wuffs_base__hasher_u32 = {
  (uint32_t(*)(const void*))(&wuffs_crc32__ieee_hasher__checksum_u32),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_crc32__ieee_hasher__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_crc32__ieee_hasher__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      wuffs_base__slice_u8))(&wuffs_crc32__ieee_hasher__update),
  (uint32_t(*)(void*,
      wuffs_base__slice_u8))(&wuffs_crc32__ieee_hasher__update_u32),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_crc32__ieee_hasher__initialize(
    wuffs_crc32__ieee_hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.choosy_up = &wuffs_crc32__ieee_hasher__up__choosy_default;

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__hasher_u32.vtable_name =
      wuffs_base__hasher_u32__vtable_name;
  self->private_impl.vtable_for__wuffs_base__hasher_u32.function_pointers =
      (const void*)(&wuffs_crc32__ieee_hasher__func_ptrs_for__wuffs_base__hasher_u32);
  return wuffs_base__make_status(NULL);
}

wuffs_crc32__ieee_hasher*
wuffs_crc32__ieee_hasher__alloc(void) {
  wuffs_crc32__ieee_hasher* x =
      (wuffs_crc32__ieee_hasher*)(calloc(1, sizeof(wuffs_crc32__ieee_hasher)));
  if (!x) {
    return NULL;
  }
  if (wuffs_crc32__ieee_hasher__initialize(
      x, sizeof(wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_crc32__ieee_hasher(void) {
  return sizeof(wuffs_crc32__ieee_hasher);
}

// ---------------- Function Implementations

// -------- func crc32.ieee_hasher.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_crc32__ieee_hasher__get_quirk(
    const wuffs_crc32__ieee_hasher* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func crc32.ieee_hasher.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_crc32__ieee_hasher__set_quirk(
    wuffs_crc32__ieee_hasher* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func crc32.ieee_hasher.update

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__update(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  if (self->private_impl.f_state == 0u) {
    self->private_impl.choosy_up = (
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_CRC32)
        wuffs_base__cpu_arch__have_arm_crc32() ? &wuffs_crc32__ieee_hasher__up_arm_crc32 :
#endif
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
        wuffs_base__cpu_arch__have_x86_sse42() ? &wuffs_crc32__ieee_hasher__up_x86_sse42 :
#endif
        self->private_impl.choosy_up);
  }
  wuffs_crc32__ieee_hasher__up(self, a_x);
  return wuffs_base__make_empty_struct();
}

// -------- func crc32.ieee_hasher.update_u32

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_crc32__ieee_hasher__update_u32(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return 0;
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return 0;
  }

  wuffs_crc32__ieee_hasher__update(self, a_x);
  return self->private_impl.f_state;
}

// -------- func crc32.ieee_hasher.up

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__up(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x) {
  return (*self->private_impl.choosy_up)(self, a_x);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__up__choosy_default(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x) {
  uint32_t v_s = 0;
  wuffs_base__slice_u8 v_p = {0};

  v_s = (4294967295u ^ self->private_impl.f_state);
  {
    wuffs_base__slice_u8 i_slice_p = a_x;
    v_p.ptr = i_slice_p.ptr;
    v_p.len = 16;
    const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 32) * 32));
    while (v_p.ptr < i_end0_p) {
      v_s ^= ((((uint32_t)(v_p.ptr[0u])) << 0u) |
          (((uint32_t)(v_p.ptr[1u])) << 8u) |
          (((uint32_t)(v_p.ptr[2u])) << 16u) |
          (((uint32_t)(v_p.ptr[3u])) << 24u));
      v_s = (WUFFS_CRC32__IEEE_TABLE[0u][v_p.ptr[15u]] ^
          WUFFS_CRC32__IEEE_TABLE[1u][v_p.ptr[14u]] ^
          WUFFS_CRC32__IEEE_TABLE[2u][v_p.ptr[13u]] ^
          WUFFS_CRC32__IEEE_TABLE[3u][v_p.ptr[12u]] ^
          WUFFS_CRC32__IEEE_TABLE[4u][v_p.ptr[11u]] ^
          WUFFS_CRC32__IEEE_TABLE[5u][v_p.ptr[10u]] ^
          WUFFS_CRC32__IEEE_TABLE[6u][v_p.ptr[9u]] ^
          WUFFS_CRC32__IEEE_TABLE[7u][v_p.ptr[8u]] ^
          WUFFS_CRC32__IEEE_TABLE[8u][v_p.ptr[7u]] ^
          WUFFS_CRC32__IEEE_TABLE[9u][v_p.ptr[6u]] ^
          WUFFS_CRC32__IEEE_TABLE[10u][v_p.ptr[5u]] ^
          WUFFS_CRC32__IEEE_TABLE[11u][v_p.ptr[4u]] ^
          WUFFS_CRC32__IEEE_TABLE[12u][(255u & (v_s >> 24u))] ^
          WUFFS_CRC32__IEEE_TABLE[13u][(255u & (v_s >> 16u))] ^
          WUFFS_CRC32__IEEE_TABLE[14u][(255u & (v_s >> 8u))] ^
          WUFFS_CRC32__IEEE_TABLE[15u][(255u & (v_s >> 0u))]);
      v_p.ptr += 16;
      v_s ^= ((((uint32_t)(v_p.ptr[0u])) << 0u) |
          (((uint32_t)(v_p.ptr[1u])) << 8u) |
          (((uint32_t)(v_p.ptr[2u])) << 16u) |
          (((uint32_t)(v_p.ptr[3u])) << 24u));
      v_s = (WUFFS_CRC32__IEEE_TABLE[0u][v_p.ptr[15u]] ^
          WUFFS_CRC32__IEEE_TABLE[1u][v_p.ptr[14u]] ^
          WUFFS_CRC32__IEEE_TABLE[2u][v_p.ptr[13u]] ^
          WUFFS_CRC32__IEEE_TABLE[3u][v_p.ptr[12u]] ^
          WUFFS_CRC32__IEEE_TABLE[4u][v_p.ptr[11u]] ^
          WUFFS_CRC32__IEEE_TABLE[5u][v_p.ptr[10u]] ^
          WUFFS_CRC32__IEEE_TABLE[6u][v_p.ptr[9u]] ^
          WUFFS_CRC32__IEEE_TABLE[7u][v_p.ptr[8u]] ^
          WUFFS_CRC32__IEEE_TABLE[8u][v_p.ptr[7u]] ^
          WUFFS_CRC32__IEEE_TABLE[9u][v_p.ptr[6u]] ^
          WUFFS_CRC32__IEEE_TABLE[10u][v_p.ptr[5u]] ^
          WUFFS_CRC32__IEEE_TABLE[11u][v_p.ptr[4u]] ^
          WUFFS_CRC32__IEEE_TABLE[12u][(255u & (v_s >> 24u))] ^
          WUFFS_CRC32__IEEE_TABLE[13u][(255u & (v_s >> 16u))] ^
          WUFFS_CRC32__IEEE_TABLE[14u][(255u & (v_s >> 8u))] ^
          WUFFS_CRC32__IEEE_TABLE[15u][(255u & (v_s >> 0u))]);
      v_p.ptr += 16;
    }
    v_p.len = 16;
    const uint8_t* i_end1_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 16) * 16));
    while (v_p.ptr < i_end1_p) {
      v_s ^= ((((uint32_t)(v_p.ptr[0u])) << 0u) |
          (((uint32_t)(v_p.ptr[1u])) << 8u) |
          (((uint32_t)(v_p.ptr[2u])) << 16u) |
          (((uint32_t)(v_p.ptr[3u])) << 24u));
      v_s = (WUFFS_CRC32__IEEE_TABLE[0u][v_p.ptr[15u]] ^
          WUFFS_CRC32__IEEE_TABLE[1u][v_p.ptr[14u]] ^
          WUFFS_CRC32__IEEE_TABLE[2u][v_p.ptr[13u]] ^
          WUFFS_CRC32__IEEE_TABLE[3u][v_p.ptr[12u]] ^
          WUFFS_CRC32__IEEE_TABLE[4u][v_p.ptr[11u]] ^
          WUFFS_CRC32__IEEE_TABLE[5u][v_p.ptr[10u]] ^
          WUFFS_CRC32__IEEE_TABLE[6u][v_p.ptr[9u]] ^
          WUFFS_CRC32__IEEE_TABLE[7u][v_p.ptr[8u]] ^
          WUFFS_CRC32__IEEE_TABLE[8u][v_p.ptr[7u]] ^
          WUFFS_CRC32__IEEE_TABLE[9u][v_p.ptr[6u]] ^
          WUFFS_CRC32__IEEE_TABLE[10u][v_p.ptr[5u]] ^
          WUFFS_CRC32__IEEE_TABLE[11u][v_p.ptr[4u]] ^
          WUFFS_CRC32__IEEE_TABLE[12u][(255u & (v_s >> 24u))] ^
          WUFFS_CRC32__IEEE_TABLE[13u][(255u & (v_s >> 16u))] ^
          WUFFS_CRC32__IEEE_TABLE[14u][(255u & (v_s >> 8u))] ^
          WUFFS_CRC32__IEEE_TABLE[15u][(255u & (v_s >> 0u))]);
      v_p.ptr += 16;
    }
    v_p.len = 1;
    const uint8_t* i_end2_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
    while (v_p.ptr < i_end2_p) {
      v_s = (WUFFS_CRC32__IEEE_TABLE[0u][((uint8_t)(((uint8_t)(v_s)) ^ v_p.ptr[0u]))] ^ (v_s >> 8u));
      v_p.ptr += 1;
    }
    v_p.len = 0;
  }
  self->private_impl.f_state = (4294967295u ^ v_s);
  return wuffs_base__make_empty_struct();
}

// -------- func crc32.ieee_hasher.checksum_u32

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_crc32__ieee_hasher__checksum_u32(
    const wuffs_crc32__ieee_hasher* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return self->private_impl.f_state;
}

// ‼ WUFFS MULTI-FILE SECTION +arm_crc32
// -------- func crc32.ieee_hasher.up_arm_crc32

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_CRC32)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__up_arm_crc32(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x) {
  wuffs_base__slice_u8 v_p = {0};
  uint32_t v_s = 0;

  v_s = (4294967295u ^ self->private_impl.f_state);
  while ((((uint64_t)(a_x.len)) > 0u) && ((15u & ((uint32_t)(0xFFFu & (uintptr_t)(a_x.ptr)))) != 0u)) {
    v_s = __crc32b(v_s, a_x.ptr[0u]);
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 1u);
  }
  {
    wuffs_base__slice_u8 i_slice_p = a_x;
    v_p.ptr = i_slice_p.ptr;
    v_p.len = 8;
    const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 128) * 128));
    while (v_p.ptr < i_end0_p) {
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
    }
    v_p.len = 8;
    const uint8_t* i_end1_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 8) * 8));
    while (v_p.ptr < i_end1_p) {
      v_s = __crc32d(v_s, wuffs_base__peek_u64le__no_bounds_check(v_p.ptr));
      v_p.ptr += 8;
    }
    v_p.len = 1;
    const uint8_t* i_end2_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
    while (v_p.ptr < i_end2_p) {
      v_s = __crc32b(v_s, v_p.ptr[0u]);
      v_p.ptr += 1;
    }
    v_p.len = 0;
  }
  self->private_impl.f_state = (4294967295u ^ v_s);
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_CRC32)
// ‼ WUFFS MULTI-FILE SECTION -arm_crc32

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
// -------- func crc32.ieee_hasher.up_x86_sse42

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc32__ieee_hasher__up_x86_sse42(
    wuffs_crc32__ieee_hasher* self,
    wuffs_base__slice_u8 a_x) {
  uint32_t v_s = 0;
  __m128i v_kk = {0};
  __m128i v_x0 = {0};
  __m128i v_x1 = {0};
  __m128i v_x2 = {0};
  __m128i v_x3 = {0};
  __m128i v_x4 = {0};
  __m128i v_x5 = {0};
  __m128i v_x6 = {0};
  __m128i v_x7 = {0};
  __m128i v_y0 = {0};
  __m128i v_y1 = {0};
  __m128i v_y2 = {0};
  __m128i v_y3 = {0};
  __m128i v_y4 = {0};
  __m128i v_y5 = {0};
  __m128i v_y6 = {0};
  __m128i v_y7 = {0};

  v_s = (4294967295u ^ self->private_impl.f_state);
  while ((((uint64_t)(a_x.len)) > 0u) && ((15u & ((uint32_t)(0xFFFu & (uintptr_t)(a_x.ptr)))) != 0u)) {
    v_s = (WUFFS_CRC32__IEEE_TABLE[0u][((uint8_t)(((uint8_t)(v_s)) ^ a_x.ptr[0u]))] ^ (v_s >> 8u));
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 1u);
  }
  if (((uint64_t)(a_x.len)) >= 128u) {
    v_x0 = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 0u));
    v_x1 = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 16u));
    v_x2 = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 32u));
    v_x3 = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 48u));
    v_x4 = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 64u));
    v_x5 = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 80u));
    v_x6 = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 96u));
    v_x7 = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 112u));
    v_kk = _mm_set_epi32((int32_t)(0u), (int32_t)(2433674945u), (int32_t)(0u), (int32_t)(872412467u));
    v_x0 = _mm_xor_si128(v_x0, _mm_cvtsi32_si128((int32_t)(v_s)));
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 128u);
    while (((uint64_t)(a_x.len)) >= 128u) {
      v_y0 = _mm_clmulepi64_si128(v_x0, v_kk, (int32_t)(0u));
      v_x0 = _mm_clmulepi64_si128(v_x0, v_kk, (int32_t)(17u));
      v_y1 = _mm_clmulepi64_si128(v_x1, v_kk, (int32_t)(0u));
      v_x1 = _mm_clmulepi64_si128(v_x1, v_kk, (int32_t)(17u));
      v_y2 = _mm_clmulepi64_si128(v_x2, v_kk, (int32_t)(0u));
      v_x2 = _mm_clmulepi64_si128(v_x2, v_kk, (int32_t)(17u));
      v_y3 = _mm_clmulepi64_si128(v_x3, v_kk, (int32_t)(0u));
      v_x3 = _mm_clmulepi64_si128(v_x3, v_kk, (int32_t)(17u));
      v_y4 = _mm_clmulepi64_si128(v_x4, v_kk, (int32_t)(0u));
      v_x4 = _mm_clmulepi64_si128(v_x4, v_kk, (int32_t)(17u));
      v_y5 = _mm_clmulepi64_si128(v_x5, v_kk, (int32_t)(0u));
      v_x5 = _mm_clmulepi64_si128(v_x5, v_kk, (int32_t)(17u));
      v_y6 = _mm_clmulepi64_si128(v_x6, v_kk, (int32_t)(0u));
      v_x6 = _mm_clmulepi64_si128(v_x6, v_kk, (int32_t)(17u));
      v_y7 = _mm_clmulepi64_si128(v_x7, v_kk, (int32_t)(0u));
      v_x7 = _mm_clmulepi64_si128(v_x7, v_kk, (int32_t)(17u));
      v_y0 = _mm_xor_si128(v_y0, _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 0u)));
      v_x0 = _mm_xor_si128(v_x0, v_y0);
      v_y1 = _mm_xor_si128(v_y1, _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 16u)));
      v_x1 = _mm_xor_si128(v_x1, v_y1);
      v_y2 = _mm_xor_si128(v_y2, _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 32u)));
      v_x2 = _mm_xor_si128(v_x2, v_y2);
      v_y3 = _mm_xor_si128(v_y3, _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 48u)));
      v_x3 = _mm_xor_si128(v_x3, v_y3);
      v_y4 = _mm_xor_si128(v_y4, _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 64u)));
      v_x4 = _mm_xor_si128(v_x4, v_y4);
      v_y5 = _mm_xor_si128(v_y5, _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 80u)));
      v_x5 = _mm_xor_si128(v_x5, v_y5);
      v_y6 = _mm_xor_si128(v_y6, _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 96u)));
      v_x6 = _mm_xor_si128(v_x6, v_y6);
      v_y7 = _mm_xor_si128(v_y7, _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 112u)));
      v_x7 = _mm_xor_si128(v_x7, v_y7);
      a_x = wuffs_base__slice_u8__subslice_i(a_x, 128u);
    }
    v_kk = _mm_set_epi32((int32_t)(0u), (int32_t)(3433693342u), (int32_t)(0u), (int32_t)(2926088593u));
    v_y0 = _mm_clmulepi64_si128(v_x0, v_kk, (int32_t)(0u));
    v_x0 = _mm_clmulepi64_si128(v_x0, v_kk, (int32_t)(17u));
    v_y2 = _mm_clmulepi64_si128(v_x2, v_kk, (int32_t)(0u));
    v_x2 = _mm_clmulepi64_si128(v_x2, v_kk, (int32_t)(17u));
    v_y4 = _mm_clmulepi64_si128(v_x4, v_kk, (int32_t)(0u));
    v_x4 = _mm_clmulepi64_si128(v_x4, v_kk, (int32_t)(17u));
    v_y6 = _mm_clmulepi64_si128(v_x6, v_kk, (int32_t)(0u));
    v_x6 = _mm_clmulepi64_si128(v_x6, v_kk, (int32_t)(17u));
    v_y0 = _mm_xor_si128(v_y0, v_x1);
    v_x0 = _mm_xor_si128(v_x0, v_y0);
    v_y2 = _mm_xor_si128(v_y2, v_x3);
    v_x2 = _mm_xor_si128(v_x2, v_y2);
    v_y4 = _mm_xor_si128(v_y4, v_x5);
    v_x4 = _mm_xor_si128(v_x4, v_y4);
    v_y6 = _mm_xor_si128(v_y6, v_x7);
    v_x6 = _mm_xor_si128(v_x6, v_y6);
    v_kk = _mm_set_epi32((int32_t)(0u), (int32_t)(2166711591u), (int32_t)(0u), (int32_t)(4057597354u));
    v_y0 = _mm_clmulepi64_si128(v_x0, v_kk, (int32_t)(0u));
    v_x0 = _mm_clmulepi64_si128(v_x0, v_kk, (int32_t)(17u));
    v_y4 = _mm_clmulepi64_si128(v_x4, v_kk, (int32_t)(0u));
    v_x4 = _mm_clmulepi64_si128(v_x4, v_kk, (int32_t)(17u));
    v_y0 = _mm_xor_si128(v_y0, v_x2);
    v_x0 = _mm_xor_si128(v_x0, v_y0);
    v_y4 = _mm_xor_si128(v_y4, v_x6);
    v_x4 = _mm_xor_si128(v_x4, v_y4);
    v_kk = _mm_set_epi32((int32_t)(0u), (int32_t)(496309207u), (int32_t)(0u), (int32_t)(2402626965u));
    v_y0 = _mm_clmulepi64_si128(v_x0, v_kk, (int32_t)(0u));
    v_x0 = _mm_clmulepi64_si128(v_x0, v_kk, (int32_t)(17u));
    v_y0 = _mm_xor_si128(v_y0, v_x4);
    v_x0 = _mm_xor_si128(v_x0, v_y0);
    v_kk = _mm_set_epi32((int32_t)(1u), (int32_t)(3681617473u), (int32_t)(3034951717u), (int32_t)(4144043585u));
    v_s = ((uint32_t)(_mm_extract_epi32(_mm_clmulepi64_si128(_mm_clmulepi64_si128(_mm_cvtsi64_si128((int64_t)(((uint64_t)(_mm_extract_epi64(v_x0, (int32_t)(0u)))))), v_kk, (int32_t)(0u)), v_kk, (int32_t)(16u)), (int32_t)(2u))));
    v_kk = _mm_set_epi32((int32_t)(1u), (int32_t)(3681617473u), (int32_t)(3034951717u), (int32_t)(4144043585u));
    v_s = ((uint32_t)(_mm_extract_epi32(_mm_clmulepi64_si128(_mm_clmulepi64_si128(_mm_cvtsi64_si128((int64_t)((((uint64_t)(_mm_extract_epi64(v_x0, (int32_t)(1u)))) ^ ((uint64_t)(v_s))))), v_kk, (int32_t)(0u)), v_kk, (int32_t)(16u)), (int32_t)(2u))));
  }
  while (((uint64_t)(a_x.len)) >= 8u) {
    v_kk = _mm_set_epi32((int32_t)(1u), (int32_t)(3681617473u), (int32_t)(3034951717u), (int32_t)(4144043585u));
    v_s = ((uint32_t)(_mm_extract_epi32(_mm_clmulepi64_si128(_mm_clmulepi64_si128(_mm_cvtsi64_si128((int64_t)((wuffs_base__peek_u64le__no_bounds_check(a_x.ptr) ^ ((uint64_t)(v_s))))), v_kk, (int32_t)(0u)), v_kk, (int32_t)(16u)), (int32_t)(2u))));
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 8u);
  }
  while (((uint64_t)(a_x.len)) > 0u) {
    v_s = (WUFFS_CRC32__IEEE_TABLE[0u][((uint8_t)(((uint8_t)(v_s)) ^ a_x.ptr[0u]))] ^ (v_s >> 8u));
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 1u);
  }
  self->private_impl.f_state = (4294967295u ^ v_s);
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CRC32)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CRC64)

// ---------------- Status Codes Implementations

// ---------------- Private Consts

static const uint64_t
WUFFS_CRC64__ECMA_TABLE[8][256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  {
    0u, 12911341560706588527u, 17619267392293085275u, 5164075066763771700u, 8921845837811637811u, 14483170935171449180u, 10328150133527543400u, 4357999468653093127u,
    17843691675623275622u, 4940391307328217865u, 226782375002905661u, 12685511915359257426u, 10119945210068853333u, 4566377562367245626u, 8715998937306186254u, 14689403211693301089u,
    9051005139383707209u, 14895072503764629798u, 9880782614656435730u, 4193374422961527165u, 453564750005811322u, 13070904082541799189u, 17496296445768931361u, 4747102235666401102u,
    9960315520700766767u, 4113029525020509504u, 9132755124734491252u, 14812441257301386523u, 17431997874612372508u, 4811156168024382323u, 391483189436228679u, 13132671735097031464u,
    18102010278767414418u, 5195199925788447741u, 1131375642422963401u, 13591081480414639014u, 9288535643022529185u, 3731739485546663374u, 8386748845923054330u, 14361410892855143829u,
    907129500011622644u, 13814943346342178715u, 17875617253995106479u, 5421418680781082560u, 8594564625313771207u, 14152643483341451688u, 9494204471332802204u, 3525329033817543155u,
    9704381199536204507u, 3855837706121835956u, 8226059050041019008u, 13908973417437222383u, 18265510249468982504u, 5643692520190618503u, 718348998302913715u, 13463047253836762076u,
    8146277531524994749u, 13989069943491807698u, 9622312336048764646u, 3938150108875254153u, 782966378872457358u, 13399312233903888353u, 18327840216347633877u, 5582173445676054458u,
    7257036000092981153u, 15535280666427316430u, 10390399851576895482u, 2529986302517213333u, 2262751284845926802u, 12414353723947190013u, 16997392145760156105u, 6398650419759490726u,
    10599130201908394951u, 2322133910755632296u, 7463478971093326748u, 15329644185724306675u, 16773497691846108660u, 6622864283287239323u, 2036569382881248687u, 12640783567252986560u,
    1814259000023245288u, 12250853444207230599u, 17125426475222188467u, 6811676960462675676u, 7132938157145702363u, 15119434731753103540u, 10842837361562165120u, 2690676064372932847u,
    17189129250627542414u, 6747026957542163169u, 1875814858707893717u, 12188560364711551674u, 10762704257491731389u, 2770420489343360210u, 7050658067635086310u, 15201536148867841161u,
    11493583972846619443u, 3219832958944941148u, 7711675412243671912u, 15576564987190227975u, 16452118100082038016u, 6305011443818121839u, 1213047649942025563u, 11816267669673208372u,
    7503259434831574869u, 15784731923736995898u, 11287385040381237006u, 3425713581329221729u, 1436697996605827430u, 11591809733187859977u, 16677985422973077821u, 6078267261889762898u,
    16292555063049989498u, 5851447209550246421u, 1630020308903038241u, 11939238787801010766u, 11081681957373440841u, 3090674103720225830u, 7876300217750508306u, 16023932746787097725u,
    1565932757744914716u, 12003503911822413427u, 16230825569204842823u, 5913566482019610152u, 7956607163135676207u, 15944361922680361024u, 11164346891352108916u, 3008957496780927003u,
    14514072000185962306u, 8809633696146542637u, 4460922918905818905u, 10287960411460399222u, 12879331835779764593u, 113391187501452830u, 5059972605034426666u, 17660565739912801861u,
    4525502569691853604u, 10224187249629523019u, 14576435430675780479u, 8748148222884465680u, 4980157760350383383u, 17740628527280140920u, 12797300839518981452u, 195741594718114339u,
    13040162471224305931u, 565687821211481700u, 4644267821511264592u, 17536326748496696895u, 14926957942186653496u, 8937808626997553239u, 4297282312656885603u, 9839608450464401420u,
    4852190599768102253u, 17327666750234135042u, 13245728566574478646u, 359174499151456857u, 4073138765762497374u, 10063573324157604913u, 14700457781105076997u, 9163920108173816938u,
    3628518000046490576u, 9328460452529085631u, 14330211790445699979u, 8498696072880078052u, 5299565100954197475u, 18061012165519327884u, 13623353920925351352u, 1018284691440624343u,
    14265876314291404726u, 8562713237611094233u, 3566469078572851181u, 9390260331795218562u, 13702854325316886917u, 937907429353946858u, 5381352128745865694u, 17978417549248290481u,
    5746791986423309721u, 18225777846762470134u, 13494053915084326338u, 606523824971012781u, 3751629717415787434u, 9745292510640121029u, 13876787882151992305u, 8338992711486538910u,
    13285957365033343487u, 815010154451519120u, 5540840978686720420u, 18431906428167644875u, 14101316135270172620u, 8115412784602421411u, 3978303581567838103u, 9519354766961195256u,
    12527462061959317731u, 2230461459452909452u, 6439665917889882296u, 16893009583564617687u, 15423350824487343824u, 7288217715337890239u, 2490078880175191691u, 10493603952060017124u,
    6520081235612152965u, 16813546994155744234u, 12610022887636243678u, 2148641156328442801u, 2426095299884051126u, 10557972909709735385u, 15361512820870335213u, 7350228890552538498u,
    15006518869663149738u, 7165105895222849989u, 2649782550477098737u, 10947027550912647582u, 12362696414880903321u, 1783234539286425590u, 6851427162658443458u, 17022309211647725485u,
    2873395993211654860u, 10722532847870938531u, 15232418832718623383u, 6938393941075996152u, 6642978682516671743u, 17230443782969840528u, 12156534523779525796u, 1989151790783919051u,
    6263731030979658865u, 16556202624882645790u, 11702894419100492842u, 1245039440087595845u, 3260040617806076482u, 11390642587947386157u, 15688795063501830681u, 7680756410435167606u,
    11622868312827688983u, 1324891275238549368u, 6181348207440451660u, 16638201170595874595u, 15752600435501016612u, 7616209416359311691u, 3321489341258335871u, 11328242235714328848u,
    3131865515489829432u, 10977756817953029463u, 16137146508898304611u, 7844397531750915340u, 5811434156413844491u, 16395372229761246052u, 11827132964039220304u, 1660744670629167935u,
    15913214326271352414u, 8068573254449152305u, 2905717078206922245u, 11204220263579804010u, 12035829987123708013u, 1452858539103461122u, 6017914993561854006u, 16189773752444600153u,
  }, {
    0u, 6118555238288912653u, 12237110476577825306u, 18247330833359770391u, 13942380710360636081u, 10778293617712507836u, 7543452712389327019u, 4343374206906190246u,
    1162559746622204903u, 4957131115480832746u, 13398436261328603645u, 17084888254066768112u, 15086905424778654038u, 9634902877839851611u, 8686748413812380492u, 3198961161184305729u,
    2325119493244409806u, 8407378615347160771u, 9914262230961665492u, 15960741045388068057u, 16229058527915052415u, 13101053971319389298u, 5254506258681524069u, 2018377927885299304u,
    3487552142959377449u, 7246080283574668580u, 11075676491871100467u, 14798208821638459198u, 17373496827624760984u, 11957750539307177877u, 6397922322368611458u, 873845550624159119u,
    4650238986488819612u, 1468611264581623441u, 16814757230694321542u, 13669406796222545035u, 9364600845881799981u, 15356367945216001056u, 2893367039927949111u, 8993183146101597754u,
    5812680741028562043u, 307286854339917174u, 17976181078471403105u, 12506848973898782572u, 10509012517363048138u, 14213073068277772231u, 4036755855770598608u, 7848658706446142941u,
    6975104285918754898u, 3757679901787621727u, 14492160567149337160u, 11382574084698991429u, 11651310343450272483u, 17679087685142107118u, 604386294999662841u, 6668229816820511220u,
    8137636784695169973u, 2596263716583940792u, 15653459723670892975u, 10220140060479144098u, 12795844644737222916u, 16535671346696648713u, 1747691101248318238u, 5523790692630174227u,
    9300477972977639224u, 15418239225476001333u, 2937222529163246882u, 8947075512310451247u, 4642267913777087881u, 1478833794519692420u, 16842993350473770899u, 13643422681269376670u,
    10462937938231096543u, 14256895642581861842u, 4098594218943518405u, 7784568886045304776u, 5786734079855898222u, 335485660068962147u, 17986366292203195508u, 12498915352811683193u,
    11625361482057124086u, 17707288688936286715u, 614573708679834348u, 6660293997941431265u, 6929031904881267271u, 3801500275841901386u, 14553996732492558429u, 11318486464284246352u,
    12787875770090627857u, 16545891676414235164u, 1775925023235784971u, 5497808777625382918u, 8073511711541197216u, 2658137194938402989u, 15697317412892285882u, 10174030228858301111u,
    13950208571837509796u, 10768213751408296361u, 7515359803575243454u, 4369215658492879795u, 64266086328445461u, 6056541296517372696u, 12193111774187735055u, 18293581128395077890u,
    15112713823828466499u, 9606842886146402894u, 8676701462472931673u, 3206755967968430164u, 1208772589999325682u, 4913169729330573567u, 13336459633641022440u, 17149116886581154533u,
    16275273569390339946u, 13057090384914568807u, 5192527433167881584u, 2082608760381092989u, 2350925692077440475u, 8379320821714095318u, 9904217479574233025u, 15968533654375526092u,
    17437760713698643085u, 11895738795633802624u, 6353925819959930519u, 920093647833407386u, 3495382202496636476u, 7235998217053677361u, 11047581385260348454u, 14824052473177163051u,
    10447068876609200373u, 14128364157388739064u, 4118967294799201007u, 7908597456515216354u, 5874445058326493764u, 391603411424480073u, 17894151024620902494u, 12447300791057279315u,
    9284535827554175762u, 15289779793358354975u, 2957667589039384840u, 9071030930460645381u, 4729911307347480995u, 1535020299074674862u, 16750846767572792249u, 13591740465559749300u,
    12735909365018523451u, 16453465302197274166u, 1832394617641637153u, 5585730863000118316u, 8197188437887036810u, 2678299164963691655u, 15569137772090609552u, 10158372272797335197u,
    11573468159711796444u, 17614790262716542417u, 670971320137924294u, 6748289234561093579u, 7052776217202099821u, 3821593491595032416u, 14425748405936874615u, 11302896163253294458u,
    15020497008676966249u, 9555230900528283236u, 8764415362900159859u, 3262871967819308158u, 1229147417359668696u, 5037195377843840213u, 13320587995882862530u, 17020586948957226703u,
    13858063809762534542u, 10716528681989657987u, 7603000551683802772u, 4425403642365261721u, 84709666887204415u, 6180499360129388338u, 12177172482473303077u, 18165119875451415848u,
    17309582619392432295u, 11880078264510294442u, 6477599625422879421u, 940257368289594288u, 3551850046471569942u, 7323923223311315739u, 10995617555250765836u, 14731624552464748801u,
    16147023423082394432u, 13041502936518885965u, 5316274389876805978u, 2102700497890566231u, 2407324781779167729u, 8467313413945678076u, 9852321304593615851u, 15876037047908055782u,
    1291018766690942925u, 4973072573440528064u, 13274480430592564695u, 17064442507263798490u, 15030719607150486908u, 9547259896855319665u, 8738431316985759590u, 3291108156134209131u,
    128532172656890922u, 6134424711959717159u, 12113082593034745392u, 18226958170089932605u, 13886262546419256987u, 10690581952315096982u, 7595066862094806145u, 4435588787024731532u,
    3580050981226981379u, 7297974293382715662u, 10987681667836234265u, 14741811897106152212u, 17353402924945863346u, 11834005814401532863u, 6413511935936860328u, 1002093465131966885u,
    2417545179998651364u, 8459344608371405545u, 9826339458661147134u, 15904271038397419763u, 16208896970474576213u, 12977377931899316312u, 5270164626790366031u, 2146558256149678658u,
    5864365122984562769u, 399431204366950748u, 17919992407673188939u, 12419207813205476166u, 10385054866335763168u, 14192630174644861933u, 4165217520762185978u, 7864598685623228919u,
    4701851384154880950u, 1560828767195761339u, 16758641643428190636u, 13581693582721149089u, 9240574510442684679u, 15335992705270927370u, 3021896290089222941u, 9009054371811832336u,
    8153224920554538911u, 2724514274940876434u, 15633368673088300421u, 10096393516356015240u, 12707851639919861038u, 16479271570068024355u, 1840187295666814772u, 5575686180147088953u,
    6990764404993272952u, 3885857308630146421u, 14471996434107354722u, 11258899592309161839u, 11563386024119531209u, 17622620253752952772u, 696814903175779539u, 6720194058879067614u,
  }, {
    0u, 4542972359516777931u, 9085944719033555862u, 4691664355513513565u, 18171889438067111724u, 14061474303606774503u, 9383328711027027130u, 13633424072306524529u,
    7676286055365832925u, 6164376987427609878u, 1481798532234586955u, 3142253189322229376u, 10855962452864321521u, 12223826156538735162u, 16771372852738792551u, 15543052108730888620u,
    15352572110731665850u, 16862791698018765937u, 12328753974855219756u, 10669987536837040103u, 2963597064469173910u, 1597421751597874013u, 6284506378644458752u, 7511137813735006411u,
    13801544397233820007u, 9260261528098962604u, 13951919735851666161u, 18344511890033026874u, 4874982405016790603u, 8983709158270585728u, 4445237816650825181u, 196831773885239318u,
    4091022007653359089u, 562346998784700474u, 5103132815620245095u, 8780357948041161644u, 14189083196432476893u, 18150173592266475286u, 13474345022262784331u, 9652793049543924864u,
    5927194128938347820u, 7875246409875505383u, 3194843503195748026u, 1395478681687169905u, 12569012757288917504u, 10477056948030502859u, 15022275627470012822u, 17253916197967211613u,
    17134349580696108107u, 15186860751721288064u, 10655150290339489757u, 12453952663903504918u, 1289987737384422247u, 3381381201708377772u, 8066289525279445233u, 5835212509754572090u,
    9749964810033581206u, 13278076374523191645u, 17967418316541171456u, 14290755639648123595u, 8890475633301650362u, 4929947589851190897u, 393663547770478636u, 4214651972966108647u,
    8182044015306718178u, 5658655167774316073u, 1124693997569400948u, 3499391957275839935u, 10206265631240490190u, 12873559114121502981u, 17560715896082323288u, 14753743294414502547u,
    1948880861322201919u, 2594127930539943668u, 7285718382500778153u, 6491924633276939618u, 16655531858934856723u, 15577868310755742168u, 11039333611388512133u, 11977453108914408014u,
    11854388257876695640u, 11207451878732806035u, 15750492819751010766u, 16545974958769302533u, 6389687006391496052u, 7469038772501250239u, 2790957363374339810u, 1851148384058628905u,
    14845159798643632773u, 17370237963685480270u, 12687582131971748115u, 10311195790054169816u, 3615017233668480425u, 946035540305899618u, 5493509258033841727u, 8302171348940565492u,
    5281120895271462419u, 8521283507583323096u, 3989500891288354181u, 600787064567550030u, 13071075951463747903u, 9974957613568212212u, 14659789384177486505u, 17616368207971182434u,
    2579975474768844494u, 2073357103652371205u, 6762762403416755544u, 7120694423275413651u, 16132579050558890466u, 16206641305794825257u, 11670425019509144180u, 11456679111066785727u,
    11260412520859862953u, 11767594448091671138u, 16308316081471249471u, 15949821717821010420u, 6947506857025941637u, 6872882154850049358u, 2196985003345963795u, 2411294364755134168u,
    17780951266603300724u, 14540225107906894527u, 9859895179702381794u, 13249171359945539881u, 787327095540957272u, 3884007889973030291u, 8429303945932217294u, 5472161678768272901u,
    16364088030613436356u, 15858029804260760079u, 11317310335548632146u, 11674676600264311193u, 2249387995138801896u, 2322888996435045667u, 6998783914551679870u, 6785602652076537525u,
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  },
};

static const uint8_t
WUFFS_CRC64__ECMA_X86_SSE42_FOLD1[16] WUFFS_BASE__POTENTIALLY_UNUSED = {
  228u, 58u, 57u, 202u, 151u, 212u, 93u, 224u,
  64u, 95u, 135u, 199u, 175u, 149u, 190u, 218u,
};

static const uint8_t
WUFFS_CRC64__ECMA_X86_SSE42_FOLD2[16] WUFFS_BASE__POTENTIALLY_UNUSED = {
  68u, 250u, 158u, 138u, 0u, 91u, 9u, 96u,
  81u, 175u, 225u, 15u, 163u, 83u, 230u, 59u,
};

static const uint8_t
WUFFS_CRC64__ECMA_X86_SSE42_FOLD4[16] WUFFS_BASE__POTENTIALLY_UNUSED = {
  243u, 65u, 212u, 157u, 187u, 239u, 227u, 106u,
  244u, 45u, 132u, 167u, 84u, 96u, 31u, 8u,
};

static const uint8_t
WUFFS_CRC64__ECMA_X86_SSE42_FOLD8[16] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 16u, 204u, 79u, 29u, 215u, 87u, 135u,
  64u, 231u, 61u, 247u, 42u, 107u, 216u, 215u,
};

static const uint8_t
WUFFS_CRC64__ECMA_X86_SSE42_MUPX[16] WUFFS_BASE__POTENTIALLY_UNUSED = {
  213u, 99u, 41u, 23u, 108u, 70u, 62u, 156u,
  133u, 30u, 14u, 175u, 43u, 175u, 216u, 146u,
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc64__ecma_hasher__up(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc64__ecma_hasher__up__choosy_default(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x);

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc64__ecma_hasher__up_x86_sse42(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)

// ---------------- VTables

const wuffs_base__hasher_u64__func_ptrs
wuffs_crc64__ecma_hasher__func_ptrs_for__wuffs_base__hasher_u64 = {
  (uint64_t(*)(const void*))(&wuffs_crc64__ecma_hasher__checksum_u64),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_crc64__ecma_hasher__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_crc64__ecma_hasher__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      wuffs_base__slice_u8))(&wuffs_crc64__ecma_hasher__update),
  (uint64_t(*)(void*,
      wuffs_base__slice_u8))(&wuffs_crc64__ecma_hasher__update_u64),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_crc64__ecma_hasher__initialize(
    wuffs_crc64__ecma_hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.choosy_up = &wuffs_crc64__ecma_hasher__up__choosy_default;

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__hasher_u64.vtable_name =
      wuffs_base__hasher_u64__vtable_name;
  self->private_impl.vtable_for__wuffs_base__hasher_u64.function_pointers =
      (const void*)(&wuffs_crc64__ecma_hasher__func_ptrs_for__wuffs_base__hasher_u64);
  return wuffs_base__make_status(NULL);
}

wuffs_crc64__ecma_hasher*
wuffs_crc64__ecma_hasher__alloc(void) {
  wuffs_crc64__ecma_hasher* x =
      (wuffs_crc64__ecma_hasher*)(calloc(1, sizeof(wuffs_crc64__ecma_hasher)));
  if (!x) {
    return NULL;
  }
  if (wuffs_crc64__ecma_hasher__initialize(
      x, sizeof(wuffs_crc64__ecma_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_crc64__ecma_hasher(void) {
  return sizeof(wuffs_crc64__ecma_hasher);
}

// ---------------- Function Implementations

// -------- func crc64.ecma_hasher.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_crc64__ecma_hasher__get_quirk(
    const wuffs_crc64__ecma_hasher* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func crc64.ecma_hasher.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_crc64__ecma_hasher__set_quirk(
    wuffs_crc64__ecma_hasher* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func crc64.ecma_hasher.update

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_crc64__ecma_hasher__update(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  if (self->private_impl.f_state == 0u) {
    self->private_impl.choosy_up = (
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
        wuffs_base__cpu_arch__have_x86_sse42() ? &wuffs_crc64__ecma_hasher__up_x86_sse42 :
#endif
        self->private_impl.choosy_up);
  }
  wuffs_crc64__ecma_hasher__up(self, a_x);
  return wuffs_base__make_empty_struct();
}

// -------- func crc64.ecma_hasher.update_u64

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_crc64__ecma_hasher__update_u64(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return 0;
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return 0;
  }

  wuffs_crc64__ecma_hasher__update(self, a_x);
  return wuffs_crc64__ecma_hasher__checksum_u64(self);
}

// -------- func crc64.ecma_hasher.up

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc64__ecma_hasher__up(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x) {
  return (*self->private_impl.choosy_up)(self, a_x);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc64__ecma_hasher__up__choosy_default(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x) {
  uint64_t v_s = 0;
  wuffs_base__slice_u8 v_p = {0};

  v_s = (18446744073709551615u ^ self->private_impl.f_state);
  {
    wuffs_base__slice_u8 i_slice_p = a_x;
    v_p.ptr = i_slice_p.ptr;
    v_p.len = 8;
    const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 8) * 8));
    while (v_p.ptr < i_end0_p) {
      v_s ^= ((((uint64_t)(v_p.ptr[0u])) << 0u) |
          (((uint64_t)(v_p.ptr[1u])) << 8u) |
          (((uint64_t)(v_p.ptr[2u])) << 16u) |
          (((uint64_t)(v_p.ptr[3u])) << 24u) |
          (((uint64_t)(v_p.ptr[4u])) << 32u) |
          (((uint64_t)(v_p.ptr[5u])) << 40u) |
          (((uint64_t)(v_p.ptr[6u])) << 48u) |
          (((uint64_t)(v_p.ptr[7u])) << 56u));
      v_s = (WUFFS_CRC64__ECMA_TABLE[0u][(255u & (v_s >> 56u))] ^
          WUFFS_CRC64__ECMA_TABLE[1u][(255u & (v_s >> 48u))] ^
          WUFFS_CRC64__ECMA_TABLE[2u][(255u & (v_s >> 40u))] ^
          WUFFS_CRC64__ECMA_TABLE[3u][(255u & (v_s >> 32u))] ^
          WUFFS_CRC64__ECMA_TABLE[4u][(255u & (v_s >> 24u))] ^
          WUFFS_CRC64__ECMA_TABLE[5u][(255u & (v_s >> 16u))] ^
          WUFFS_CRC64__ECMA_TABLE[6u][(255u & (v_s >> 8u))] ^
          WUFFS_CRC64__ECMA_TABLE[7u][(255u & (v_s >> 0u))]);
      v_p.ptr += 8;
    }
    v_p.len = 1;
    const uint8_t* i_end1_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
    while (v_p.ptr < i_end1_p) {
      v_s = (WUFFS_CRC64__ECMA_TABLE[0u][((uint8_t)(((uint8_t)(v_s)) ^ v_p.ptr[0u]))] ^ (v_s >> 8u));
      v_p.ptr += 1;
    }
    v_p.len = 0;
  }
  self->private_impl.f_state = (18446744073709551615u ^ v_s);
  return wuffs_base__make_empty_struct();
}

// -------- func crc64.ecma_hasher.checksum_u64

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_crc64__ecma_hasher__checksum_u64(
    const wuffs_crc64__ecma_hasher* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return self->private_impl.f_state;
}

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
// -------- func crc64.ecma_hasher.up_x86_sse42

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_crc64__ecma_hasher__up_x86_sse42(
    wuffs_crc64__ecma_hasher* self,
    wuffs_base__slice_u8 a_x) {
  uint64_t v_s = 0;
  wuffs_base__slice_u8 v_p = {0};
  uint8_t v_buf[48] = {0};
  __m128i v_xa = {0};
  __m128i v_xb = {0};
  __m128i v_xc = {0};
  __m128i v_xd = {0};
  __m128i v_xe = {0};
  __m128i v_xf = {0};
  __m128i v_xg = {0};
  __m128i v_xh = {0};
  __m128i v_mu1 = {0};
  __m128i v_mu2 = {0};
  __m128i v_mu4 = {0};
  __m128i v_mu8 = {0};
  __m128i v_mupx = {0};

  v_s = (18446744073709551615u ^ self->private_impl.f_state);
  while ((((uint64_t)(a_x.len)) > 0u) && ((15u & ((uint32_t)(0xFFFu & (uintptr_t)(a_x.ptr)))) != 0u)) {
    v_s = (WUFFS_CRC64__ECMA_TABLE[0u][((uint8_t)(((uint8_t)(v_s)) ^ a_x.ptr[0u]))] ^ (v_s >> 8u));
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 1u);
  }
  do {
    do {
      if (((uint64_t)(a_x.len)) >= 128u) {
      } else if (((uint64_t)(a_x.len)) >= 64u) {
        v_xa = _mm_xor_si128(_mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 0u)), _mm_cvtsi64_si128((int64_t)(v_s)));
        v_xb = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 16u));
        v_xc = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 32u));
        v_xd = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 48u));
        a_x = wuffs_base__slice_u8__subslice_i(a_x, 64u);
        break;
      } else if (((uint64_t)(a_x.len)) >= 32u) {
        v_xa = _mm_xor_si128(_mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 0u)), _mm_cvtsi64_si128((int64_t)(v_s)));
        v_xb = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 16u));
        a_x = wuffs_base__slice_u8__subslice_i(a_x, 32u);
        goto label__chain2__break;
      } else {
        {
          wuffs_base__slice_u8 i_slice_p = a_x;
          v_p.ptr = i_slice_p.ptr;
          v_p.len = 1;
          const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
          while (v_p.ptr < i_end0_p) {
            v_s = (WUFFS_CRC64__ECMA_TABLE[0u][((uint8_t)(((uint8_t)(v_s)) ^ v_p.ptr[0u]))] ^ (v_s >> 8u));
            v_p.ptr += 1;
          }
          v_p.len = 0;
        }
        self->private_impl.f_state = (18446744073709551615u ^ v_s);
        return wuffs_base__make_empty_struct();
      }
      v_xa = _mm_xor_si128(_mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 0u)), _mm_cvtsi64_si128((int64_t)(v_s)));
      v_xb = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 16u));
      v_xc = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 32u));
      v_xd = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 48u));
      v_xe = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 64u));
      v_xf = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 80u));
      v_xg = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 96u));
      v_xh = _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 112u));
      a_x = wuffs_base__slice_u8__subslice_i(a_x, 128u);
      v_mu8 = _mm_lddqu_si128((const __m128i*)(const void*)(WUFFS_CRC64__ECMA_X86_SSE42_FOLD8));
      while (((uint64_t)(a_x.len)) >= 128u) {
        v_xa = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xa, v_mu8, (int32_t)(0u)), _mm_clmulepi64_si128(v_xa, v_mu8, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 0u)));
        v_xb = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xb, v_mu8, (int32_t)(0u)), _mm_clmulepi64_si128(v_xb, v_mu8, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 16u)));
        v_xc = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xc, v_mu8, (int32_t)(0u)), _mm_clmulepi64_si128(v_xc, v_mu8, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 32u)));
        v_xd = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xd, v_mu8, (int32_t)(0u)), _mm_clmulepi64_si128(v_xd, v_mu8, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 48u)));
        v_xe = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xe, v_mu8, (int32_t)(0u)), _mm_clmulepi64_si128(v_xe, v_mu8, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 64u)));
        v_xf = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xf, v_mu8, (int32_t)(0u)), _mm_clmulepi64_si128(v_xf, v_mu8, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 80u)));
        v_xg = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xg, v_mu8, (int32_t)(0u)), _mm_clmulepi64_si128(v_xg, v_mu8, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 96u)));
        v_xh = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xh, v_mu8, (int32_t)(0u)), _mm_clmulepi64_si128(v_xh, v_mu8, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 112u)));
        a_x = wuffs_base__slice_u8__subslice_i(a_x, 128u);
      }
      v_mu4 = _mm_lddqu_si128((const __m128i*)(const void*)(WUFFS_CRC64__ECMA_X86_SSE42_FOLD4));
      v_xa = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xa, v_mu4, (int32_t)(0u)), _mm_clmulepi64_si128(v_xa, v_mu4, (int32_t)(17u))), v_xe);
      v_xb = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xb, v_mu4, (int32_t)(0u)), _mm_clmulepi64_si128(v_xb, v_mu4, (int32_t)(17u))), v_xf);
      v_xc = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xc, v_mu4, (int32_t)(0u)), _mm_clmulepi64_si128(v_xc, v_mu4, (int32_t)(17u))), v_xg);
      v_xd = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xd, v_mu4, (int32_t)(0u)), _mm_clmulepi64_si128(v_xd, v_mu4, (int32_t)(17u))), v_xh);
      if (((uint64_t)(a_x.len)) > 64u) {
        v_xa = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xa, v_mu4, (int32_t)(0u)), _mm_clmulepi64_si128(v_xa, v_mu4, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 0u)));
        v_xb = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xb, v_mu4, (int32_t)(0u)), _mm_clmulepi64_si128(v_xb, v_mu4, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 16u)));
        v_xc = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xc, v_mu4, (int32_t)(0u)), _mm_clmulepi64_si128(v_xc, v_mu4, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 32u)));
        v_xd = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xd, v_mu4, (int32_t)(0u)), _mm_clmulepi64_si128(v_xd, v_mu4, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 48u)));
        a_x = wuffs_base__slice_u8__subslice_i(a_x, 64u);
      }
    } while (0);
    v_mu2 = _mm_lddqu_si128((const __m128i*)(const void*)(WUFFS_CRC64__ECMA_X86_SSE42_FOLD2));
    v_xa = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xa, v_mu2, (int32_t)(0u)), _mm_clmulepi64_si128(v_xa, v_mu2, (int32_t)(17u))), v_xc);
    v_xb = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xb, v_mu2, (int32_t)(0u)), _mm_clmulepi64_si128(v_xb, v_mu2, (int32_t)(17u))), v_xd);
    if (((uint64_t)(a_x.len)) > 32u) {
      v_xa = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xa, v_mu2, (int32_t)(0u)), _mm_clmulepi64_si128(v_xa, v_mu2, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 0u)));
      v_xb = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xb, v_mu2, (int32_t)(0u)), _mm_clmulepi64_si128(v_xb, v_mu2, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 16u)));
      a_x = wuffs_base__slice_u8__subslice_i(a_x, 32u);
    }
  } while (0);
  label__chain2__break:;
  v_mu1 = _mm_lddqu_si128((const __m128i*)(const void*)(WUFFS_CRC64__ECMA_X86_SSE42_FOLD1));
  v_xa = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xa, v_mu1, (int32_t)(0u)), _mm_clmulepi64_si128(v_xa, v_mu1, (int32_t)(17u))), v_xb);
  if (((uint64_t)(a_x.len)) > 24u) {
    v_xa = _mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(v_xa, v_mu1, (int32_t)(0u)), _mm_clmulepi64_si128(v_xa, v_mu1, (int32_t)(17u))), _mm_lddqu_si128((const __m128i*)(const void*)(a_x.ptr + 0u)));
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 16u);
    if (((uint64_t)(a_x.len)) > 24u) {
      return wuffs_base__make_empty_struct();
    }
  }
  _mm_storeu_si128((__m128i*)(void*)(v_buf + (24u - ((uint64_t)(a_x.len)))), v_xa);
  wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8_ij(v_buf, ((24u - ((uint64_t)(a_x.len))) + 16u), 48), a_x);
  v_mu2 = _mm_lddqu_si128((const __m128i*)(const void*)(WUFFS_CRC64__ECMA_X86_SSE42_FOLD2));
  v_xa = _mm_lddqu_si128((const __m128i*)(const void*)(v_buf + 0u));
  v_xb = _mm_lddqu_si128((const __m128i*)(const void*)(v_buf + 16u));
  v_xc = _mm_lddqu_si128((const __m128i*)(const void*)(v_buf + 32u));
  v_xd = _mm_xor_si128(_mm_clmulepi64_si128(v_xa, v_mu2, (int32_t)(0u)), _mm_clmulepi64_si128(v_xa, v_mu2, (int32_t)(17u)));
  v_xe = _mm_xor_si128(_mm_clmulepi64_si128(v_xb, v_mu1, (int32_t)(0u)), _mm_clmulepi64_si128(v_xb, v_mu1, (int32_t)(17u)));
  v_xa = _mm_xor_si128(v_xd, _mm_xor_si128(v_xe, v_xc));
  v_mupx = _mm_lddqu_si128((const __m128i*)(const void*)(WUFFS_CRC64__ECMA_X86_SSE42_MUPX));
  v_xb = _mm_clmulepi64_si128(v_xa, v_mupx, (int32_t)(0u));
  v_xc = _mm_clmulepi64_si128(v_xb, v_mupx, (int32_t)(16u));
  v_s = ((uint64_t)(_mm_extract_epi64(_mm_xor_si128(_mm_xor_si128(v_xc, _mm_slli_si128(v_xb, (int32_t)(8u))), v_xa), (int32_t)(1u))));
  self->private_impl.f_state = (18446744073709551615u ^ v_s);
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CRC64)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__DEFLATE)

// ---------------- Status Codes Implementations

const char wuffs_deflate__error__bad_huffman_code_over_subscribed[] = "#deflate: bad Huffman code (over-subscribed)";
const char wuffs_deflate__error__bad_huffman_code_under_subscribed[] = "#deflate: bad Huffman code (under-subscribed)";
const char wuffs_deflate__error__bad_huffman_code_length_count[] = "#deflate: bad Huffman code length count";
const char wuffs_deflate__error__bad_huffman_code_length_repetition[] = "#deflate: bad Huffman code length repetition";
const char wuffs_deflate__error__bad_huffman_code[] = "#deflate: bad Huffman code";
const char wuffs_deflate__error__bad_huffman_minimum_code_length[] = "#deflate: bad Huffman minimum code length";
const char wuffs_deflate__error__bad_block[] = "#deflate: bad block";
const char wuffs_deflate__error__bad_distance[] = "#deflate: bad distance";
const char wuffs_deflate__error__bad_distance_code_count[] = "#deflate: bad distance code count";
const char wuffs_deflate__error__bad_literal_length_code_count[] = "#deflate: bad literal/length code count";
const char wuffs_deflate__error__inconsistent_stored_block_length[] = "#deflate: inconsistent stored block length";
const char wuffs_deflate__error__missing_end_of_block_code[] = "#deflate: missing end-of-block code";
const char wuffs_deflate__error__no_huffman_codes[] = "#deflate: no Huffman codes";
const char wuffs_deflate__error__truncated_input[] = "#deflate: truncated input";
const char wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state[] = "#deflate: internal error: inconsistent Huffman decoder state";
const char wuffs_deflate__error__internal_error_inconsistent_i_o[] = "#deflate: internal error: inconsistent I/O";
const char wuffs_deflate__error__internal_error_inconsistent_distance[] = "#deflate: internal error: inconsistent distance";
const char wuffs_deflate__error__internal_error_inconsistent_n_bits[] = "#deflate: internal error: inconsistent n_bits";

// ---------------- Private Consts

static const uint8_t
WUFFS_DEFLATE__CODE_ORDER[19] WUFFS_BASE__POTENTIALLY_UNUSED = {
  16u, 17u, 18u, 0u, 8u, 7u, 9u, 6u,
  10u, 5u, 11u, 4u, 12u, 3u, 13u, 2u,
  14u, 1u, 15u,
};

static const uint8_t
WUFFS_DEFLATE__REVERSE8[256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 128u, 64u, 192u, 32u, 160u, 96u, 224u,
  16u, 144u, 80u, 208u, 48u, 176u, 112u, 240u,
  8u, 136u, 72u, 200u, 40u, 168u, 104u, 232u,
  24u, 152u, 88u, 216u, 56u, 184u, 120u, 248u,
  4u, 132u, 68u, 196u, 36u, 164u, 100u, 228u,
  20u, 148u, 84u, 212u, 52u, 180u, 116u, 244u,
  12u, 140u, 76u, 204u, 44u, 172u, 108u, 236u,
  28u, 156u, 92u, 220u, 60u, 188u, 124u, 252u,
  2u, 130u, 66u, 194u, 34u, 162u, 98u, 226u,
  18u, 146u, 82u, 210u, 50u, 178u, 114u, 242u,
  10u, 138u, 74u, 202u, 42u, 170u, 106u, 234u,
  26u, 154u, 90u, 218u, 58u, 186u, 122u, 250u,
  6u, 134u, 70u, 198u, 38u, 166u, 102u, 230u,
  22u, 150u, 86u, 214u, 54u, 182u, 118u, 246u,
  14u, 142u, 78u, 206u, 46u, 174u, 110u, 238u,
  30u, 158u, 94u, 222u, 62u, 190u, 126u, 254u,
  1u, 129u, 65u, 193u, 33u, 161u, 97u, 225u,
  17u, 145u, 81u, 209u, 49u, 177u, 113u, 241u,
  9u, 137u, 73u, 201u, 41u, 169u, 105u, 233u,
  25u, 153u, 89u, 217u, 57u, 185u, 121u, 249u,
  5u, 133u, 69u, 197u, 37u, 165u, 101u, 229u,
  21u, 149u, 85u, 213u, 53u, 181u, 117u, 245u,
  13u, 141u, 77u, 205u, 45u, 173u, 109u, 237u,
  29u, 157u, 93u, 221u, 61u, 189u, 125u, 253u,
  3u, 131u, 67u, 195u, 35u, 163u, 99u, 227u,
  19u, 147u, 83u, 211u, 51u, 179u, 115u, 243u,
  11u, 139u, 75u, 203u, 43u, 171u, 107u, 235u,
  27u, 155u, 91u, 219u, 59u, 187u, 123u, 251u,
  7u, 135u, 71u, 199u, 39u, 167u, 103u, 231u,
  23u, 151u, 87u, 215u, 55u, 183u, 119u, 247u,
  15u, 143u, 79u, 207u, 47u, 175u, 111u, 239u,
  31u, 159u, 95u, 223u, 63u, 191u, 127u, 255u,
};

static const uint32_t
WUFFS_DEFLATE__LCODE_MAGIC_NUMBERS[32] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1073741824u, 1073742080u, 1073742336u, 1073742592u, 1073742848u, 1073743104u, 1073743360u, 1073743616u,
  1073743888u, 1073744400u, 1073744912u, 1073745424u, 1073745952u, 1073746976u, 1073748000u, 1073749024u,
  1073750064u, 1073752112u, 1073754160u, 1073756208u, 1073758272u, 1073762368u, 1073766464u, 1073770560u,
  1073774672u, 1073782864u, 1073791056u, 1073799248u, 1073807104u, 134217728u, 134217728u, 134217728u,
};

static const uint32_t
WUFFS_DEFLATE__DCODE_MAGIC_NUMBERS[32] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1073741824u, 1073742080u, 1073742336u, 1073742592u, 1073742864u, 1073743376u, 1073743904u, 1073744928u,
  1073745968u, 1073748016u, 1073750080u, 1073754176u, 1073758288u, 1073766480u, 1073774688u, 1073791072u,
  1073807472u, 1073840240u, 1073873024u, 1073938560u, 1074004112u, 1074135184u, 1074266272u, 1074528416u,
  1074790576u, 1075314864u, 1075839168u, 1076887744u, 1077936336u, 1080033488u, 134217728u, 134217728u,
};

#define WUFFS_DEFLATE__HUFFS_TABLE_SIZE 1024u

#define WUFFS_DEFLATE__HUFFS_TABLE_MASK 1023u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__do_transform_io(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_blocks(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_uncompressed(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__init_fixed_huffman(
    wuffs_deflate__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__init_dynamic_huffman(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__init_huff(
    wuffs_deflate__decoder* self,
    uint32_t a_which,
    uint32_t a_n_codes0,
    uint32_t a_n_codes1,
    uint32_t a_base_symbol);

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_bmi2(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_fast32(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_fast64(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_fast64__choosy_default(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_slow(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

// ---------------- VTables

const wuffs_base__io_transformer__func_ptrs
wuffs_deflate__decoder__func_ptrs_for__wuffs_base__io_transformer = {
  (wuffs_base__optional_u63(*)(const void*))(&wuffs_deflate__decoder__dst_history_retain_length),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_deflate__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_deflate__decoder__set_quirk),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_deflate__decoder__transform_io),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_deflate__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_deflate__decoder__initialize(
    wuffs_deflate__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.choosy_decode_huffman_fast64 = &wuffs_deflate__decoder__decode_huffman_fast64__choosy_default;

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__io_transformer.vtable_name =
      wuffs_base__io_transformer__vtable_name;
  self->private_impl.vtable_for__wuffs_base__io_transformer.function_pointers =
      (const void*)(&wuffs_deflate__decoder__func_ptrs_for__wuffs_base__io_transformer);
  return wuffs_base__make_status(NULL);
}

wuffs_deflate__decoder*
wuffs_deflate__decoder__alloc(void) {
  wuffs_deflate__decoder* x =
      (wuffs_deflate__decoder*)(calloc(1, sizeof(wuffs_deflate__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_deflate__decoder__initialize(
      x, sizeof(wuffs_deflate__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_deflate__decoder(void) {
  return sizeof(wuffs_deflate__decoder);
}

// ---------------- Function Implementations

// -------- func deflate.decoder.add_history

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_deflate__decoder__add_history(
    wuffs_deflate__decoder* self,
    wuffs_base__slice_u8 a_hist) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  wuffs_base__slice_u8 v_s = {0};
  uint64_t v_n_copied = 0;
  uint32_t v_already_full = 0;

  v_s = a_hist;
  if (((uint64_t)(v_s.len)) >= 32768u) {
    v_s = wuffs_private_impl__slice_u8__suffix(v_s, 32768u);
    wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8(self->private_data.f_history, 32768), v_s);
    self->private_impl.f_history_index = 32768u;
  } else {
    v_n_copied = wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8_ij(self->private_data.f_history, (self->private_impl.f_history_index & 32767u), 32768), v_s);
    if (v_n_copied < ((uint64_t)(v_s.len))) {
      v_s = wuffs_base__slice_u8__subslice_i(v_s, v_n_copied);
      v_n_copied = wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8(self->private_data.f_history, 32768), v_s);
      self->private_impl.f_history_index = (((uint32_t)((v_n_copied & 32767u))) + 32768u);
    } else {
      v_already_full = 0u;
      if (self->private_impl.f_history_index >= 32768u) {
        v_already_full = 32768u;
      }
      self->private_impl.f_history_index = ((self->private_impl.f_history_index & 32767u) + ((uint32_t)((v_n_copied & 32767u))) + v_already_full);
    }
  }
  wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8_ij(self->private_data.f_history, 32768, 33025), wuffs_base__make_slice_u8(self->private_data.f_history, 33025));
  return wuffs_base__make_empty_struct();
}

// -------- func deflate.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_deflate__decoder__get_quirk(
    const wuffs_deflate__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func deflate.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_deflate__decoder__set_quirk(
    wuffs_deflate__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func deflate.decoder.dst_history_retain_length

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_deflate__decoder__dst_history_retain_length(
    const wuffs_deflate__decoder* self) {
  if (!self) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }

  return wuffs_base__utility__make_optional_u63(true, 0u);
}

// -------- func deflate.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_deflate__decoder__workbuf_len(
    const wuffs_deflate__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(1u, 1u);
}

// -------- func deflate.decoder.transform_io

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_deflate__decoder__transform_io(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_deflate__decoder__do_transform_io(self, a_dst, a_src, a_workbuf);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_deflate__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func deflate.decoder.do_transform_io

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__do_transform_io(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_mark = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }

  uint32_t coro_susp_point = self->private_impl.p_do_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.choosy_decode_huffman_fast64 = (
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
        wuffs_base__cpu_arch__have_x86_bmi2() ? &wuffs_deflate__decoder__decode_huffman_bmi2 :
#endif
        self->private_impl.choosy_decode_huffman_fast64);
    while (true) {
      v_mark = ((uint64_t)(iop_a_dst - io0_a_dst));
      {
        if (a_dst) {
          a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
        }
        wuffs_base__status t_0 = wuffs_deflate__decoder__decode_blocks(self, a_dst, a_src);
        v_status = t_0;
        if (a_dst) {
          iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
        }
      }
      if ( ! wuffs_base__status__is_suspension(&v_status)) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      }
      wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_transformed_history_count, wuffs_private_impl__io__count_since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst))));
      wuffs_deflate__decoder__add_history(self, wuffs_private_impl__io__since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst));
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_do_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }

  return status;
}

// -------- func deflate.decoder.decode_blocks

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_blocks(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_final = 0;
  uint32_t v_b0 = 0;
  uint32_t v_type = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_blocks;
  if (coro_susp_point) {
    v_final = self->private_data.s_decode_blocks.v_final;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    label__outer__continue:;
    while (v_final == 0u) {
      while (self->private_impl.f_n_bits < 3u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint32_t t_0 = *iop_a_src++;
          v_b0 = t_0;
        }
        self->private_impl.f_bits |= (v_b0 << (self->private_impl.f_n_bits & 3u));
        self->private_impl.f_n_bits = ((self->private_impl.f_n_bits & 3u) + 8u);
      }
      v_final = (self->private_impl.f_bits & 1u);
      v_type = ((self->private_impl.f_bits >> 1u) & 3u);
      self->private_impl.f_bits >>= 3u;
      self->private_impl.f_n_bits -= 3u;
      if (v_type == 0u) {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        status = wuffs_deflate__decoder__decode_uncompressed(self, a_dst, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
        continue;
      } else if (v_type == 1u) {
        v_status = wuffs_deflate__decoder__init_fixed_huffman(self);
        if ( ! wuffs_base__status__is_ok(&v_status)) {
          status = v_status;
          if (wuffs_base__status__is_error(&status)) {
            goto exit;
          } else if (wuffs_base__status__is_suspension(&status)) {
            status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
            goto exit;
          }
          goto ok;
        }
      } else if (v_type == 2u) {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        status = wuffs_deflate__decoder__init_dynamic_huffman(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
      } else {
        status = wuffs_base__make_status(wuffs_deflate__error__bad_block);
        goto exit;
      }
      self->private_impl.f_end_of_block = false;
      while (true) {
        if (sizeof(void*) == 4u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          v_status = wuffs_deflate__decoder__decode_huffman_fast32(self, a_dst, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        } else {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          v_status = wuffs_deflate__decoder__decode_huffman_fast64(self, a_dst, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        if (wuffs_base__status__is_error(&v_status)) {
          status = v_status;
          goto exit;
        }
        if (self->private_impl.f_end_of_block) {
          goto label__outer__continue;
        }
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        status = wuffs_deflate__decoder__decode_huffman_slow(self, a_dst, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
        if (self->private_impl.f_end_of_block) {
          goto label__outer__continue;
        }
      }
    }

    ok:
    self->private_impl.p_decode_blocks = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_blocks = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_blocks.v_final = v_final;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func deflate.decoder.decode_uncompressed

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_uncompressed(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_length = 0;
  uint32_t v_n_copied = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_uncompressed;
  if (coro_susp_point) {
    v_length = self->private_data.s_decode_uncompressed.v_length;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if ((self->private_impl.f_n_bits >= 8u) || ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7u)) != 0u)) {
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
      goto exit;
    }
    self->private_impl.f_n_bits = 0u;
    self->private_impl.f_bits = 0u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_uncompressed.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_uncompressed.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_length = t_0;
    }
    if ((((v_length) & 0xFFFFu) + ((v_length) >> (32u - 16u))) != 65535u) {
      status = wuffs_base__make_status(wuffs_deflate__error__inconsistent_stored_block_length);
      goto exit;
    }
    v_length = ((v_length) & 0xFFFFu);
    while (true) {
      v_n_copied = wuffs_private_impl__io_writer__limited_copy_u32_from_reader(
          &iop_a_dst, io2_a_dst,v_length, &iop_a_src, io2_a_src);
      if (v_length <= v_n_copied) {
        status = wuffs_base__make_status(NULL);
        goto ok;
      }
      v_length -= v_n_copied;
      if (((uint64_t)(io2_a_dst - iop_a_dst)) == 0u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_write);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
      } else {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4);
      }
    }

    ok:
    self->private_impl.p_decode_uncompressed = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_uncompressed = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_uncompressed.v_length = v_length;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func deflate.decoder.init_fixed_huffman

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__init_fixed_huffman(
    wuffs_deflate__decoder* self) {
  uint32_t v_i = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  while (v_i < 144u) {
    self->private_data.f_code_lengths[v_i] = 8u;
    v_i += 1u;
  }
  while (v_i < 256u) {
    self->private_data.f_code_lengths[v_i] = 9u;
    v_i += 1u;
  }
  while (v_i < 280u) {
    self->private_data.f_code_lengths[v_i] = 7u;
    v_i += 1u;
  }
  while (v_i < 288u) {
    self->private_data.f_code_lengths[v_i] = 8u;
    v_i += 1u;
  }
  while (v_i < 320u) {
    self->private_data.f_code_lengths[v_i] = 5u;
    v_i += 1u;
  }
  v_status = wuffs_deflate__decoder__init_huff(self,
      0u,
      0u,
      288u,
      257u);
  if (wuffs_base__status__is_error(&v_status)) {
    return v_status;
  }
  v_status = wuffs_deflate__decoder__init_huff(self,
      1u,
      288u,
      320u,
      0u);
  if (wuffs_base__status__is_error(&v_status)) {
    return v_status;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func deflate.decoder.init_dynamic_huffman

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__init_dynamic_huffman(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint32_t v_b0 = 0;
  uint32_t v_n_lit = 0;
  uint32_t v_n_dist = 0;
  uint32_t v_n_clen = 0;
  uint32_t v_i = 0;
  uint32_t v_b1 = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint32_t v_mask = 0;
  uint32_t v_table_entry = 0;
  uint32_t v_table_entry_n_bits = 0;
  uint32_t v_b2 = 0;
  uint32_t v_n_extra_bits = 0;
  uint8_t v_rep_symbol = 0;
  uint32_t v_rep_count = 0;
  uint32_t v_b3 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_init_dynamic_huffman;
  if (coro_susp_point) {
    v_bits = self->private_data.s_init_dynamic_huffman.v_bits;
    v_n_bits = self->private_data.s_init_dynamic_huffman.v_n_bits;
    v_n_lit = self->private_data.s_init_dynamic_huffman.v_n_lit;
    v_n_dist = self->private_data.s_init_dynamic_huffman.v_n_dist;
    v_n_clen = self->private_data.s_init_dynamic_huffman.v_n_clen;
    v_i = self->private_data.s_init_dynamic_huffman.v_i;
    v_mask = self->private_data.s_init_dynamic_huffman.v_mask;
    v_n_extra_bits = self->private_data.s_init_dynamic_huffman.v_n_extra_bits;
    v_rep_symbol = self->private_data.s_init_dynamic_huffman.v_rep_symbol;
    v_rep_count = self->private_data.s_init_dynamic_huffman.v_rep_count;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    v_bits = self->private_impl.f_bits;
    v_n_bits = self->private_impl.f_n_bits;
    while (v_n_bits < 14u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint32_t t_0 = *iop_a_src++;
        v_b0 = t_0;
      }
      v_bits |= (v_b0 << v_n_bits);
      v_n_bits += 8u;
    }
    v_n_lit = (((v_bits) & 0x1Fu) + 257u);
    if (v_n_lit > 286u) {
      status = wuffs_base__make_status(wuffs_deflate__error__bad_literal_length_code_count);
      goto exit;
    }
    v_bits >>= 5u;
    v_n_dist = (((v_bits) & 0x1Fu) + 1u);
    if (v_n_dist > 30u) {
      status = wuffs_base__make_status(wuffs_deflate__error__bad_distance_code_count);
      goto exit;
    }
    v_bits >>= 5u;
    v_n_clen = (((v_bits) & 0xFu) + 4u);
    v_bits >>= 4u;
    v_n_bits -= 14u;
    v_i = 0u;
    while (v_i < v_n_clen) {
      while (v_n_bits < 3u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint32_t t_1 = *iop_a_src++;
          v_b1 = t_1;
        }
        v_bits |= (v_b1 << v_n_bits);
        v_n_bits += 8u;
      }
      self->private_data.f_code_lengths[WUFFS_DEFLATE__CODE_ORDER[v_i]] = ((uint8_t)((v_bits & 7u)));
      v_bits >>= 3u;
      v_n_bits -= 3u;
      v_i += 1u;
    }
    while (v_i < 19u) {
      self->private_data.f_code_lengths[WUFFS_DEFLATE__CODE_ORDER[v_i]] = 0u;
      v_i += 1u;
    }
    v_status = wuffs_deflate__decoder__init_huff(self,
        0u,
        0u,
        19u,
        4095u);
    if (wuffs_base__status__is_error(&v_status)) {
      status = v_status;
      goto exit;
    }
    v_mask = ((((uint32_t)(1u)) << self->private_impl.f_n_huffs_bits[0u]) - 1u);
    v_i = 0u;
    while (v_i < (v_n_lit + v_n_dist)) {
      while (true) {
        v_table_entry = self->private_data.f_huffs[0u][(v_bits & v_mask)];
        v_table_entry_n_bits = (v_table_entry & 15u);
        if (v_n_bits >= v_table_entry_n_bits) {
          v_bits >>= v_table_entry_n_bits;
          v_n_bits -= v_table_entry_n_bits;
          break;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint32_t t_2 = *iop_a_src++;
          v_b2 = t_2;
        }
        v_bits |= (v_b2 << v_n_bits);
        v_n_bits += 8u;
      }
      if ((v_table_entry >> 24u) != 128u) {
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      }
      v_table_entry = ((v_table_entry >> 8u) & 255u);
      if (v_table_entry < 16u) {
        self->private_data.f_code_lengths[v_i] = ((uint8_t)(v_table_entry));
        v_i += 1u;
        continue;
      }
      v_n_extra_bits = 0u;
      v_rep_symbol = 0u;
      v_rep_count = 0u;
      if (v_table_entry == 16u) {
        v_n_extra_bits = 2u;
        if (v_i <= 0u) {
          status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code_length_repetition);
          goto exit;
        }
        v_rep_symbol = ((uint8_t)(self->private_data.f_code_lengths[(v_i - 1u)] & 15u));
        v_rep_count = 3u;
      } else if (v_table_entry == 17u) {
        v_n_extra_bits = 3u;
        v_rep_symbol = 0u;
        v_rep_count = 3u;
      } else if (v_table_entry == 18u) {
        v_n_extra_bits = 7u;
        v_rep_symbol = 0u;
        v_rep_count = 11u;
      } else {
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      }
      while (v_n_bits < v_n_extra_bits) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint32_t t_3 = *iop_a_src++;
          v_b3 = t_3;
        }
        v_bits |= (v_b3 << v_n_bits);
        v_n_bits += 8u;
      }
      v_rep_count += ((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32(v_n_extra_bits));
      v_bits >>= v_n_extra_bits;
      v_n_bits -= v_n_extra_bits;
      while (v_rep_count > 0u) {
        if (v_i >= (v_n_lit + v_n_dist)) {
          status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code_length_count);
          goto exit;
        }
        self->private_data.f_code_lengths[v_i] = v_rep_symbol;
        v_i += 1u;
        v_rep_count -= 1u;
      }
    }
    if (v_i != (v_n_lit + v_n_dist)) {
      status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code_length_count);
      goto exit;
    }
    if (self->private_data.f_code_lengths[256u] == 0u) {
      status = wuffs_base__make_status(wuffs_deflate__error__missing_end_of_block_code);
      goto exit;
    }
    v_status = wuffs_deflate__decoder__init_huff(self,
        0u,
        0u,
        v_n_lit,
        257u);
    if (wuffs_base__status__is_error(&v_status)) {
      status = v_status;
      goto exit;
    }
    v_status = wuffs_deflate__decoder__init_huff(self,
        1u,
        v_n_lit,
        (v_n_lit + v_n_dist),
        0u);
    if (wuffs_base__status__is_error(&v_status)) {
      status = v_status;
      goto exit;
    }
    self->private_impl.f_bits = v_bits;
    self->private_impl.f_n_bits = v_n_bits;

    goto ok;
    ok:
    self->private_impl.p_init_dynamic_huffman = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_init_dynamic_huffman = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_init_dynamic_huffman.v_bits = v_bits;
  self->private_data.s_init_dynamic_huffman.v_n_bits = v_n_bits;
  self->private_data.s_init_dynamic_huffman.v_n_lit = v_n_lit;
  self->private_data.s_init_dynamic_huffman.v_n_dist = v_n_dist;
  self->private_data.s_init_dynamic_huffman.v_n_clen = v_n_clen;
  self->private_data.s_init_dynamic_huffman.v_i = v_i;
  self->private_data.s_init_dynamic_huffman.v_mask = v_mask;
  self->private_data.s_init_dynamic_huffman.v_n_extra_bits = v_n_extra_bits;
  self->private_data.s_init_dynamic_huffman.v_rep_symbol = v_rep_symbol;
  self->private_data.s_init_dynamic_huffman.v_rep_count = v_rep_count;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func deflate.decoder.init_huff

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__init_huff(
    wuffs_deflate__decoder* self,
    uint32_t a_which,
    uint32_t a_n_codes0,
    uint32_t a_n_codes1,
    uint32_t a_base_symbol) {
  uint16_t v_counts[16] = {0};
  uint32_t v_i = 0;
  uint32_t v_remaining = 0;
  uint16_t v_offsets[16] = {0};
  uint32_t v_n_symbols = 0;
  uint32_t v_count = 0;
  uint16_t v_symbols[320] = {0};
  uint32_t v_min_cl = 0;
  uint32_t v_max_cl = 0;
  uint32_t v_initial_high_bits = 0;
  uint32_t v_prev_cl = 0;
  uint32_t v_prev_redirect_key = 0;
  uint32_t v_top = 0;
  uint32_t v_next_top = 0;
  uint32_t v_code = 0;
  uint32_t v_key = 0;
  uint32_t v_value = 0;
  uint32_t v_cl = 0;
  uint32_t v_redirect_key = 0;
  uint32_t v_j = 0;
  uint32_t v_reversed_key = 0;
  uint32_t v_symbol = 0;
  uint32_t v_high_bits = 0;
  uint32_t v_delta = 0;

  v_i = a_n_codes0;
  while (v_i < a_n_codes1) {
    if (v_counts[((uint8_t)(self->private_data.f_code_lengths[v_i] & 15u))] >= 320u) {
      return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
    }
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
    v_counts[((uint8_t)(self->private_data.f_code_lengths[v_i] & 15u))] += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    v_i += 1u;
  }
  if ((((uint32_t)(v_counts[0u])) + a_n_codes0) == a_n_codes1) {
    return wuffs_base__make_status(wuffs_deflate__error__no_huffman_codes);
  }
  v_remaining = 1u;
  v_i = 1u;
  while (v_i <= 15u) {
    if (v_remaining > 1073741824u) {
      return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
    }
    v_remaining <<= 1u;
    if (v_remaining < ((uint32_t)(v_counts[v_i]))) {
      return wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code_over_subscribed);
    }
    v_remaining -= ((uint32_t)(v_counts[v_i]));
    v_i += 1u;
  }
  if (v_remaining != 0u) {
    if ((a_which == 1u) && (v_counts[1u] == 1u) && ((((uint32_t)(v_counts[0u])) + a_n_codes0 + 1u) == a_n_codes1)) {
      v_i = 0u;
      while (v_i <= 29u) {
        if (self->private_data.f_code_lengths[(a_n_codes0 + v_i)] == 1u) {
          self->private_impl.f_n_huffs_bits[1u] = 1u;
          self->private_data.f_huffs[1u][0u] = (WUFFS_DEFLATE__DCODE_MAGIC_NUMBERS[v_i] | 1u);
          self->private_data.f_huffs[1u][1u] = (WUFFS_DEFLATE__DCODE_MAGIC_NUMBERS[31u] | 1u);
          return wuffs_base__make_status(NULL);
        }
        v_i += 1u;
      }
    }
    return wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code_under_subscribed);
  }
  v_i = 1u;
  while (v_i <= 15u) {
    v_offsets[v_i] = ((uint16_t)(v_n_symbols));
    v_count = ((uint32_t)(v_counts[v_i]));
    if (v_n_symbols > (320u - v_count)) {
      return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
    }
    v_n_symbols = (v_n_symbols + v_count);
    v_i += 1u;
  }
  if (v_n_symbols > 288u) {
    return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
  }
  v_i = a_n_codes0;
  while (v_i < a_n_codes1) {
    if (v_i < a_n_codes0) {
      return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
    }
    if (self->private_data.f_code_lengths[v_i] != 0u) {
      if (v_offsets[((uint8_t)(self->private_data.f_code_lengths[v_i] & 15u))] >= 320u) {
        return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
      }
      v_symbols[v_offsets[((uint8_t)(self->private_data.f_code_lengths[v_i] & 15u))]] = ((uint16_t)((v_i - a_n_codes0)));
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
      v_offsets[((uint8_t)(self->private_data.f_code_lengths[v_i] & 15u))] += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    }
    v_i += 1u;
  }
  v_min_cl = 1u;
  while (true) {
    if (v_counts[v_min_cl] != 0u) {
      break;
    }
    if (v_min_cl >= 9u) {
      return wuffs_base__make_status(wuffs_deflate__error__bad_huffman_minimum_code_length);
    }
    v_min_cl += 1u;
  }
  v_max_cl = 15u;
  while (true) {
    if (v_counts[v_max_cl] != 0u) {
      break;
    }
    if (v_max_cl <= 1u) {
      return wuffs_base__make_status(wuffs_deflate__error__no_huffman_codes);
    }
    v_max_cl -= 1u;
  }
  if (v_max_cl <= 9u) {
    self->private_impl.f_n_huffs_bits[a_which] = v_max_cl;
  } else {
    self->private_impl.f_n_huffs_bits[a_which] = 9u;
  }
  v_i = 0u;
  if ((v_n_symbols != ((uint32_t)(v_offsets[v_max_cl]))) || (v_n_symbols != ((uint32_t)(v_offsets[15u])))) {
    return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
  }
  if ((a_n_codes0 + ((uint32_t)(v_symbols[0u]))) >= 320u) {
    return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
  }
  v_initial_high_bits = 512u;
  if (v_max_cl < 9u) {
    v_initial_high_bits = (((uint32_t)(1u)) << v_max_cl);
  }
  v_prev_cl = ((uint32_t)(((uint8_t)(self->private_data.f_code_lengths[(a_n_codes0 + ((uint32_t)(v_symbols[0u])))] & 15u))));
  v_prev_redirect_key = 4294967295u;
  v_top = 0u;
  v_next_top = 512u;
  v_code = 0u;
  v_key = 0u;
  v_value = 0u;
  while (true) {
    if ((a_n_codes0 + ((uint32_t)(v_symbols[v_i]))) >= 320u) {
      return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
    }
    v_cl = ((uint32_t)(((uint8_t)(self->private_data.f_code_lengths[(a_n_codes0 + ((uint32_t)(v_symbols[v_i])))] & 15u))));
    if (v_cl > v_prev_cl) {
      v_code <<= (v_cl - v_prev_cl);
      if (v_code >= 32768u) {
        return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
      }
    }
    v_prev_cl = v_cl;
    v_key = v_code;
    if (v_cl > 9u) {
      v_cl -= 9u;
      v_redirect_key = ((v_key >> v_cl) & 511u);
      v_key = ((v_key) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32(v_cl));
      if (v_prev_redirect_key != v_redirect_key) {
        v_prev_redirect_key = v_redirect_key;
        v_remaining = (((uint32_t)(1u)) << v_cl);
        v_j = v_prev_cl;
        while (v_j <= 15u) {
          if (v_remaining <= ((uint32_t)(v_counts[v_j]))) {
            break;
          }
          v_remaining -= ((uint32_t)(v_counts[v_j]));
          if (v_remaining > 1073741824u) {
            return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
          }
          v_remaining <<= 1u;
          v_j += 1u;
        }
        if ((v_j <= 9u) || (15u < v_j)) {
          return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        }
        v_j -= 9u;
        v_initial_high_bits = (((uint32_t)(1u)) << v_j);
        v_top = v_next_top;
        if ((v_top + (((uint32_t)(1u)) << v_j)) > 1024u) {
          return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        }
        v_next_top = (v_top + (((uint32_t)(1u)) << v_j));
        v_redirect_key = (((uint32_t)(WUFFS_DEFLATE__REVERSE8[(v_redirect_key >> 1u)])) | ((v_redirect_key & 1u) << 8u));
        self->private_data.f_huffs[a_which][v_redirect_key] = (268435465u | (v_top << 8u) | (v_j << 4u));
      }
    }
    if ((v_key >= 512u) || (v_counts[v_prev_cl] <= 0u)) {
      return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
    }
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
    v_counts[v_prev_cl] -= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    v_reversed_key = (((uint32_t)(WUFFS_DEFLATE__REVERSE8[(v_key >> 1u)])) | ((v_key & 1u) << 8u));
    v_reversed_key >>= (9u - v_cl);
    v_symbol = ((uint32_t)(v_symbols[v_i]));
    if (v_symbol == 256u) {
      v_value = (536870912u | v_cl);
    } else if ((v_symbol < 256u) && (a_which == 0u)) {
      v_value = (2147483648u | (v_symbol << 8u) | v_cl);
    } else if (v_symbol >= a_base_symbol) {
      v_symbol -= a_base_symbol;
      if (a_which == 0u) {
        v_value = (WUFFS_DEFLATE__LCODE_MAGIC_NUMBERS[(v_symbol & 31u)] | v_cl);
      } else {
        v_value = (WUFFS_DEFLATE__DCODE_MAGIC_NUMBERS[(v_symbol & 31u)] | v_cl);
      }
    } else {
      return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
    }
    v_high_bits = v_initial_high_bits;
    v_delta = (((uint32_t)(1u)) << v_cl);
    while (v_high_bits >= v_delta) {
      v_high_bits -= v_delta;
      if ((v_top + ((v_high_bits | v_reversed_key) & 511u)) >= 1024u) {
        return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
      }
      self->private_data.f_huffs[a_which][(v_top + ((v_high_bits | v_reversed_key) & 511u))] = v_value;
    }
    v_i += 1u;
    if (v_i >= v_n_symbols) {
      break;
    }
    v_code += 1u;
    if (v_code >= 32768u) {
      return wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
    }
  }
  return wuffs_base__make_status(NULL);
}

// ‼ WUFFS MULTI-FILE SECTION +x86_bmi2
// -------- func deflate.decoder.decode_huffman_bmi2

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("bmi2")
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_bmi2(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint32_t v_table_entry = 0;
  uint32_t v_table_entry_n_bits = 0;
  uint64_t v_lmask = 0;
  uint64_t v_dmask = 0;
  uint32_t v_redir_top = 0;
  uint32_t v_redir_mask = 0;
  uint32_t v_length = 0;
  uint32_t v_dist_minus_1 = 0;
  uint32_t v_hlen = 0;
  uint32_t v_hdist = 0;
  uint32_t v_hdist_adjustment = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  if ((self->private_impl.f_n_bits >= 8u) || ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7u)) != 0u)) {
    status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
    goto exit;
  }
  v_bits = ((uint64_t)(self->private_impl.f_bits));
  v_n_bits = self->private_impl.f_n_bits;
  v_lmask = ((((uint64_t)(1u)) << self->private_impl.f_n_huffs_bits[0u]) - 1u);
  v_dmask = ((((uint64_t)(1u)) << self->private_impl.f_n_huffs_bits[1u]) - 1u);
  if (self->private_impl.f_transformed_history_count < (a_dst ? a_dst->meta.pos : 0u)) {
    status = wuffs_base__make_status(wuffs_base__error__bad_i_o_position);
    goto exit;
  }
  v_hdist_adjustment = ((uint32_t)((self->private_impl.f_transformed_history_count - (a_dst ? a_dst->meta.pos : 0u))));
  label__loop__continue:;
  while ((((uint64_t)(io2_a_dst - iop_a_dst)) >= 266u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 8u)) {
    v_bits |= ((uint64_t)(wuffs_base__peek_u64le__no_bounds_check(iop_a_src) << (v_n_bits & 63u)));
    iop_a_src += ((63u - (v_n_bits & 63u)) >> 3u);
    v_n_bits |= 56u;
    v_table_entry = self->private_data.f_huffs[0u][(v_bits & v_lmask)];
    v_table_entry_n_bits = (v_table_entry & 15u);
    v_bits >>= v_table_entry_n_bits;
    v_n_bits -= v_table_entry_n_bits;
    if ((v_table_entry >> 31u) != 0u) {
      (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, ((uint8_t)((v_table_entry >> 8u)))), iop_a_dst += 1);
      continue;
    } else if ((v_table_entry >> 30u) != 0u) {
    } else if ((v_table_entry >> 29u) != 0u) {
      self->private_impl.f_end_of_block = true;
      break;
    } else if ((v_table_entry >> 28u) != 0u) {
      v_redir_top = ((v_table_entry >> 8u) & 65535u);
      v_redir_mask = ((((uint32_t)(1u)) << ((v_table_entry >> 4u) & 15u)) - 1u);
      v_table_entry = self->private_data.f_huffs[0u][((v_redir_top + (((uint32_t)(v_bits)) & v_redir_mask)) & 1023u)];
      v_table_entry_n_bits = (v_table_entry & 15u);
      v_bits >>= v_table_entry_n_bits;
      v_n_bits -= v_table_entry_n_bits;
      if ((v_table_entry >> 31u) != 0u) {
        (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, ((uint8_t)((v_table_entry >> 8u)))), iop_a_dst += 1);
        continue;
      } else if ((v_table_entry >> 30u) != 0u) {
      } else if ((v_table_entry >> 29u) != 0u) {
        self->private_impl.f_end_of_block = true;
        break;
      } else if ((v_table_entry >> 28u) != 0u) {
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      } else if ((v_table_entry >> 27u) != 0u) {
        status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
        goto exit;
      } else {
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      }
    } else if ((v_table_entry >> 27u) != 0u) {
      status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
      goto exit;
    } else {
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
      goto exit;
    }
    v_length = (((v_table_entry >> 8u) & 255u) + 3u);
    v_table_entry_n_bits = ((v_table_entry >> 4u) & 15u);
    if (v_table_entry_n_bits > 0u) {
      v_length = (((v_length + 253u + ((uint32_t)(((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U64(v_table_entry_n_bits))))) & 255u) + 3u);
      v_bits >>= v_table_entry_n_bits;
      v_n_bits -= v_table_entry_n_bits;
    }
    v_table_entry = self->private_data.f_huffs[1u][(v_bits & v_dmask)];
    v_table_entry_n_bits = (v_table_entry & 15u);
    v_bits >>= v_table_entry_n_bits;
    v_n_bits -= v_table_entry_n_bits;
    if ((v_table_entry >> 28u) == 1u) {
      v_redir_top = ((v_table_entry >> 8u) & 65535u);
      v_redir_mask = ((((uint32_t)(1u)) << ((v_table_entry >> 4u) & 15u)) - 1u);
      v_table_entry = self->private_data.f_huffs[1u][((v_redir_top + (((uint32_t)(v_bits)) & v_redir_mask)) & 1023u)];
      v_table_entry_n_bits = (v_table_entry & 15u);
      v_bits >>= v_table_entry_n_bits;
      v_n_bits -= v_table_entry_n_bits;
    }
    if ((v_table_entry >> 24u) != 64u) {
      if ((v_table_entry >> 24u) == 8u) {
        status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
        goto exit;
      }
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
      goto exit;
    }
    v_dist_minus_1 = ((v_table_entry >> 8u) & 32767u);
    v_table_entry_n_bits = ((v_table_entry >> 4u) & 15u);
    v_dist_minus_1 = ((v_dist_minus_1 + ((uint32_t)(((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U64(v_table_entry_n_bits))))) & 32767u);
    v_bits >>= v_table_entry_n_bits;
    v_n_bits -= v_table_entry_n_bits;
    do {
      if (((uint64_t)((v_dist_minus_1 + 1u))) > ((uint64_t)(iop_a_dst - io0_a_dst))) {
        v_hlen = 0u;
        v_hdist = ((uint32_t)((((uint64_t)((v_dist_minus_1 + 1u))) - ((uint64_t)(iop_a_dst - io0_a_dst)))));
        if (v_length > v_hdist) {
          v_length -= v_hdist;
          v_hlen = v_hdist;
        } else {
          v_hlen = v_length;
          v_length = 0u;
        }
        v_hdist += v_hdist_adjustment;
        if (self->private_impl.f_history_index < v_hdist) {
          status = wuffs_base__make_status(wuffs_deflate__error__bad_distance);
          goto exit;
        }
        wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
            &iop_a_dst, io2_a_dst,v_hlen, wuffs_base__make_slice_u8_ij(self->private_data.f_history, ((self->private_impl.f_history_index - v_hdist) & 32767u), 33025));
        if (v_length == 0u) {
          goto label__loop__continue;
        }
        if ((((uint64_t)((v_dist_minus_1 + 1u))) > ((uint64_t)(iop_a_dst - io0_a_dst))) || (((uint64_t)(v_length)) > ((uint64_t)(io2_a_dst - iop_a_dst))) || (((uint64_t)((v_length + 8u))) > ((uint64_t)(io2_a_dst - iop_a_dst)))) {
          status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_distance);
          goto exit;
        }
      }
      if ((v_dist_minus_1 + 1u) >= 8u) {
        wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_fast(
            &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1u));
      } else if ((v_dist_minus_1 + 1u) == 1u) {
        wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_distance_1_fast(
            &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1u));
      } else {
        wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast(
            &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1u));
      }
    } while (0);
  }
  if (v_n_bits > 63u) {
    status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
    goto exit;
  }
  while (v_n_bits >= 8u) {
    v_n_bits -= 8u;
    if (iop_a_src > io1_a_src) {
      iop_a_src--;
    } else {
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_i_o);
      goto exit;
    }
  }
  self->private_impl.f_bits = ((uint32_t)((v_bits & ((((uint64_t)(1u)) << v_n_bits) - 1u))));
  self->private_impl.f_n_bits = v_n_bits;
  if ((self->private_impl.f_n_bits >= 8u) || ((self->private_impl.f_bits >> self->private_impl.f_n_bits) != 0u)) {
    status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
    goto exit;
  }
  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
// ‼ WUFFS MULTI-FILE SECTION -x86_bmi2

// -------- func deflate.decoder.decode_huffman_fast32

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_fast32(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint32_t v_table_entry = 0;
  uint32_t v_table_entry_n_bits = 0;
  uint32_t v_lmask = 0;
  uint32_t v_dmask = 0;
  uint32_t v_redir_top = 0;
  uint32_t v_redir_mask = 0;
  uint32_t v_length = 0;
  uint32_t v_dist_minus_1 = 0;
  uint32_t v_hlen = 0;
  uint32_t v_hdist = 0;
  uint32_t v_hdist_adjustment = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  if ((self->private_impl.f_n_bits >= 8u) || ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7u)) != 0u)) {
    status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
    goto exit;
  }
  v_bits = self->private_impl.f_bits;
  v_n_bits = self->private_impl.f_n_bits;
  v_lmask = ((((uint32_t)(1u)) << self->private_impl.f_n_huffs_bits[0u]) - 1u);
  v_dmask = ((((uint32_t)(1u)) << self->private_impl.f_n_huffs_bits[1u]) - 1u);
  if (self->private_impl.f_transformed_history_count < (a_dst ? a_dst->meta.pos : 0u)) {
    status = wuffs_base__make_status(wuffs_base__error__bad_i_o_position);
    goto exit;
  }
  v_hdist_adjustment = ((uint32_t)((self->private_impl.f_transformed_history_count - (a_dst ? a_dst->meta.pos : 0u))));
  label__loop__continue:;
  while ((((uint64_t)(io2_a_dst - iop_a_dst)) >= 266u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 12u)) {
    if (v_n_bits < 15u) {
      v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
      iop_a_src += 1u;
      v_n_bits += 8u;
      v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
      iop_a_src += 1u;
      v_n_bits += 8u;
    } else {
    }
    v_table_entry = self->private_data.f_huffs[0u][(v_bits & v_lmask)];
    v_table_entry_n_bits = (v_table_entry & 15u);
    v_bits >>= v_table_entry_n_bits;
    v_n_bits -= v_table_entry_n_bits;
    if ((v_table_entry >> 31u) != 0u) {
      (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, ((uint8_t)((v_table_entry >> 8u)))), iop_a_dst += 1);
      continue;
    } else if ((v_table_entry >> 30u) != 0u) {
    } else if ((v_table_entry >> 29u) != 0u) {
      self->private_impl.f_end_of_block = true;
      break;
    } else if ((v_table_entry >> 28u) != 0u) {
      if (v_n_bits < 15u) {
        v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
        iop_a_src += 1u;
        v_n_bits += 8u;
        v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
        iop_a_src += 1u;
        v_n_bits += 8u;
      } else {
      }
      v_redir_top = ((v_table_entry >> 8u) & 65535u);
      v_redir_mask = ((((uint32_t)(1u)) << ((v_table_entry >> 4u) & 15u)) - 1u);
      v_table_entry = self->private_data.f_huffs[0u][((v_redir_top + (v_bits & v_redir_mask)) & 1023u)];
      v_table_entry_n_bits = (v_table_entry & 15u);
      v_bits >>= v_table_entry_n_bits;
      v_n_bits -= v_table_entry_n_bits;
      if ((v_table_entry >> 31u) != 0u) {
        (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, ((uint8_t)((v_table_entry >> 8u)))), iop_a_dst += 1);
        continue;
      } else if ((v_table_entry >> 30u) != 0u) {
      } else if ((v_table_entry >> 29u) != 0u) {
        self->private_impl.f_end_of_block = true;
        break;
      } else if ((v_table_entry >> 28u) != 0u) {
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      } else if ((v_table_entry >> 27u) != 0u) {
        status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
        goto exit;
      } else {
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      }
    } else if ((v_table_entry >> 27u) != 0u) {
      status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
      goto exit;
    } else {
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
      goto exit;
    }
    v_length = (((v_table_entry >> 8u) & 255u) + 3u);
    v_table_entry_n_bits = ((v_table_entry >> 4u) & 15u);
    if (v_table_entry_n_bits > 0u) {
      if (v_n_bits < 15u) {
        v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
        iop_a_src += 1u;
        v_n_bits += 8u;
        v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
        iop_a_src += 1u;
        v_n_bits += 8u;
      } else {
      }
      v_length = (((v_length + 253u + ((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & 255u) + 3u);
      v_bits >>= v_table_entry_n_bits;
      v_n_bits -= v_table_entry_n_bits;
    } else {
    }
    if (v_n_bits < 15u) {
      v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
      iop_a_src += 1u;
      v_n_bits += 8u;
      v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
      iop_a_src += 1u;
      v_n_bits += 8u;
    } else {
    }
    v_table_entry = self->private_data.f_huffs[1u][(v_bits & v_dmask)];
    v_table_entry_n_bits = (v_table_entry & 15u);
    v_bits >>= v_table_entry_n_bits;
    v_n_bits -= v_table_entry_n_bits;
    if ((v_table_entry >> 28u) == 1u) {
      if (v_n_bits < 15u) {
        v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
        iop_a_src += 1u;
        v_n_bits += 8u;
        v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
        iop_a_src += 1u;
        v_n_bits += 8u;
      } else {
      }
      v_redir_top = ((v_table_entry >> 8u) & 65535u);
      v_redir_mask = ((((uint32_t)(1u)) << ((v_table_entry >> 4u) & 15u)) - 1u);
      v_table_entry = self->private_data.f_huffs[1u][((v_redir_top + (v_bits & v_redir_mask)) & 1023u)];
      v_table_entry_n_bits = (v_table_entry & 15u);
      v_bits >>= v_table_entry_n_bits;
      v_n_bits -= v_table_entry_n_bits;
    } else {
    }
    if ((v_table_entry >> 24u) != 64u) {
      if ((v_table_entry >> 24u) == 8u) {
        status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
        goto exit;
      }
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
      goto exit;
    }
    v_dist_minus_1 = ((v_table_entry >> 8u) & 32767u);
    v_table_entry_n_bits = ((v_table_entry >> 4u) & 15u);
    if (v_n_bits < v_table_entry_n_bits) {
      v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
      iop_a_src += 1u;
      v_n_bits += 8u;
      v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
      iop_a_src += 1u;
      v_n_bits += 8u;
    }
    v_dist_minus_1 = ((v_dist_minus_1 + ((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & 32767u);
    v_bits >>= v_table_entry_n_bits;
    v_n_bits -= v_table_entry_n_bits;
    do {
      if (((uint64_t)((v_dist_minus_1 + 1u))) > ((uint64_t)(iop_a_dst - io0_a_dst))) {
        v_hlen = 0u;
        v_hdist = ((uint32_t)((((uint64_t)((v_dist_minus_1 + 1u))) - ((uint64_t)(iop_a_dst - io0_a_dst)))));
        if (v_length > v_hdist) {
          v_length -= v_hdist;
          v_hlen = v_hdist;
        } else {
          v_hlen = v_length;
          v_length = 0u;
        }
        v_hdist += v_hdist_adjustment;
        if (self->private_impl.f_history_index < v_hdist) {
          status = wuffs_base__make_status(wuffs_deflate__error__bad_distance);
          goto exit;
        }
        wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
            &iop_a_dst, io2_a_dst,v_hlen, wuffs_base__make_slice_u8_ij(self->private_data.f_history, ((self->private_impl.f_history_index - v_hdist) & 32767u), 33025));
        if (v_length == 0u) {
          goto label__loop__continue;
        }
        if ((((uint64_t)((v_dist_minus_1 + 1u))) > ((uint64_t)(iop_a_dst - io0_a_dst))) || (((uint64_t)(v_length)) > ((uint64_t)(io2_a_dst - iop_a_dst))) || (((uint64_t)((v_length + 8u))) > ((uint64_t)(io2_a_dst - iop_a_dst)))) {
          status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_distance);
          goto exit;
        }
      }
      if ((v_dist_minus_1 + 1u) >= 8u) {
        wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_fast(
            &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1u));
      } else {
        wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast(
            &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1u));
      }
    } while (0);
  }
  while (v_n_bits >= 8u) {
    v_n_bits -= 8u;
    if (iop_a_src > io1_a_src) {
      iop_a_src--;
    } else {
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_i_o);
      goto exit;
    }
  }
  self->private_impl.f_bits = (v_bits & ((((uint32_t)(1u)) << v_n_bits) - 1u));
  self->private_impl.f_n_bits = v_n_bits;
  if ((self->private_impl.f_n_bits >= 8u) || ((self->private_impl.f_bits >> self->private_impl.f_n_bits) != 0u)) {
    status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
    goto exit;
  }
  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func deflate.decoder.decode_huffman_fast64

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_fast64(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  return (*self->private_impl.choosy_decode_huffman_fast64)(self, a_dst, a_src);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_fast64__choosy_default(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint32_t v_table_entry = 0;
  uint32_t v_table_entry_n_bits = 0;
  uint64_t v_lmask = 0;
  uint64_t v_dmask = 0;
  uint32_t v_redir_top = 0;
  uint32_t v_redir_mask = 0;
  uint32_t v_length = 0;
  uint32_t v_dist_minus_1 = 0;
  uint32_t v_hlen = 0;
  uint32_t v_hdist = 0;
  uint32_t v_hdist_adjustment = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  if ((self->private_impl.f_n_bits >= 8u) || ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7u)) != 0u)) {
    status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
    goto exit;
  }
  v_bits = ((uint64_t)(self->private_impl.f_bits));
  v_n_bits = self->private_impl.f_n_bits;
  v_lmask = ((((uint64_t)(1u)) << self->private_impl.f_n_huffs_bits[0u]) - 1u);
  v_dmask = ((((uint64_t)(1u)) << self->private_impl.f_n_huffs_bits[1u]) - 1u);
  if (self->private_impl.f_transformed_history_count < (a_dst ? a_dst->meta.pos : 0u)) {
    status = wuffs_base__make_status(wuffs_base__error__bad_i_o_position);
    goto exit;
  }
  v_hdist_adjustment = ((uint32_t)((self->private_impl.f_transformed_history_count - (a_dst ? a_dst->meta.pos : 0u))));
  label__loop__continue:;
  while ((((uint64_t)(io2_a_dst - iop_a_dst)) >= 266u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 8u)) {
    v_bits |= ((uint64_t)(wuffs_base__peek_u64le__no_bounds_check(iop_a_src) << (v_n_bits & 63u)));
    iop_a_src += ((63u - (v_n_bits & 63u)) >> 3u);
    v_n_bits |= 56u;
    v_table_entry = self->private_data.f_huffs[0u][(v_bits & v_lmask)];
    v_table_entry_n_bits = (v_table_entry & 15u);
    v_bits >>= v_table_entry_n_bits;
    v_n_bits -= v_table_entry_n_bits;
    if ((v_table_entry >> 31u) != 0u) {
      (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, ((uint8_t)((v_table_entry >> 8u)))), iop_a_dst += 1);
      continue;
    } else if ((v_table_entry >> 30u) != 0u) {
    } else if ((v_table_entry >> 29u) != 0u) {
      self->private_impl.f_end_of_block = true;
      break;
    } else if ((v_table_entry >> 28u) != 0u) {
      v_redir_top = ((v_table_entry >> 8u) & 65535u);
      v_redir_mask = ((((uint32_t)(1u)) << ((v_table_entry >> 4u) & 15u)) - 1u);
      v_table_entry = self->private_data.f_huffs[0u][((v_redir_top + (((uint32_t)(v_bits)) & v_redir_mask)) & 1023u)];
      v_table_entry_n_bits = (v_table_entry & 15u);
      v_bits >>= v_table_entry_n_bits;
      v_n_bits -= v_table_entry_n_bits;
      if ((v_table_entry >> 31u) != 0u) {
        (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, ((uint8_t)((v_table_entry >> 8u)))), iop_a_dst += 1);
        continue;
      } else if ((v_table_entry >> 30u) != 0u) {
      } else if ((v_table_entry >> 29u) != 0u) {
        self->private_impl.f_end_of_block = true;
        break;
      } else if ((v_table_entry >> 28u) != 0u) {
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      } else if ((v_table_entry >> 27u) != 0u) {
        status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
        goto exit;
      } else {
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      }
    } else if ((v_table_entry >> 27u) != 0u) {
      status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
      goto exit;
    } else {
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
      goto exit;
    }
    v_length = (((v_table_entry >> 8u) & 255u) + 3u);
    v_table_entry_n_bits = ((v_table_entry >> 4u) & 15u);
    if (v_table_entry_n_bits > 0u) {
      v_length = (((v_length + 253u + ((uint32_t)(((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U64(v_table_entry_n_bits))))) & 255u) + 3u);
      v_bits >>= v_table_entry_n_bits;
      v_n_bits -= v_table_entry_n_bits;
    }
    v_table_entry = self->private_data.f_huffs[1u][(v_bits & v_dmask)];
    v_table_entry_n_bits = (v_table_entry & 15u);
    v_bits >>= v_table_entry_n_bits;
    v_n_bits -= v_table_entry_n_bits;
    if ((v_table_entry >> 28u) == 1u) {
      v_redir_top = ((v_table_entry >> 8u) & 65535u);
      v_redir_mask = ((((uint32_t)(1u)) << ((v_table_entry >> 4u) & 15u)) - 1u);
      v_table_entry = self->private_data.f_huffs[1u][((v_redir_top + (((uint32_t)(v_bits)) & v_redir_mask)) & 1023u)];
      v_table_entry_n_bits = (v_table_entry & 15u);
      v_bits >>= v_table_entry_n_bits;
      v_n_bits -= v_table_entry_n_bits;
    }
    if ((v_table_entry >> 24u) != 64u) {
      if ((v_table_entry >> 24u) == 8u) {
        status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
        goto exit;
      }
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
      goto exit;
    }
    v_dist_minus_1 = ((v_table_entry >> 8u) & 32767u);
    v_table_entry_n_bits = ((v_table_entry >> 4u) & 15u);
    v_dist_minus_1 = ((v_dist_minus_1 + ((uint32_t)(((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U64(v_table_entry_n_bits))))) & 32767u);
    v_bits >>= v_table_entry_n_bits;
    v_n_bits -= v_table_entry_n_bits;
    do {
      if (((uint64_t)((v_dist_minus_1 + 1u))) > ((uint64_t)(iop_a_dst - io0_a_dst))) {
        v_hlen = 0u;
        v_hdist = ((uint32_t)((((uint64_t)((v_dist_minus_1 + 1u))) - ((uint64_t)(iop_a_dst - io0_a_dst)))));
        if (v_length > v_hdist) {
          v_length -= v_hdist;
          v_hlen = v_hdist;
        } else {
          v_hlen = v_length;
          v_length = 0u;
        }
        v_hdist += v_hdist_adjustment;
        if (self->private_impl.f_history_index < v_hdist) {
          status = wuffs_base__make_status(wuffs_deflate__error__bad_distance);
          goto exit;
        }
        wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
            &iop_a_dst, io2_a_dst,v_hlen, wuffs_base__make_slice_u8_ij(self->private_data.f_history, ((self->private_impl.f_history_index - v_hdist) & 32767u), 33025));
        if (v_length == 0u) {
          goto label__loop__continue;
        }
        if ((((uint64_t)((v_dist_minus_1 + 1u))) > ((uint64_t)(iop_a_dst - io0_a_dst))) || (((uint64_t)(v_length)) > ((uint64_t)(io2_a_dst - iop_a_dst))) || (((uint64_t)((v_length + 8u))) > ((uint64_t)(io2_a_dst - iop_a_dst)))) {
          status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_distance);
          goto exit;
        }
      }
      if ((v_dist_minus_1 + 1u) >= 8u) {
        wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_fast(
            &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1u));
      } else if ((v_dist_minus_1 + 1u) == 1u) {
        wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_distance_1_fast(
            &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1u));
      } else {
        wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast(
            &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1u));
      }
    } while (0);
  }
  if (v_n_bits > 63u) {
    status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
    goto exit;
  }
  while (v_n_bits >= 8u) {
    v_n_bits -= 8u;
    if (iop_a_src > io1_a_src) {
      iop_a_src--;
    } else {
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_i_o);
      goto exit;
    }
  }
  self->private_impl.f_bits = ((uint32_t)((v_bits & ((((uint64_t)(1u)) << v_n_bits) - 1u))));
  self->private_impl.f_n_bits = v_n_bits;
  if ((self->private_impl.f_n_bits >= 8u) || ((self->private_impl.f_bits >> self->private_impl.f_n_bits) != 0u)) {
    status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
    goto exit;
  }
  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func deflate.decoder.decode_huffman_slow

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_deflate__decoder__decode_huffman_slow(
    wuffs_deflate__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint32_t v_table_entry = 0;
  uint32_t v_table_entry_n_bits = 0;
  uint32_t v_lmask = 0;
  uint32_t v_dmask = 0;
  uint32_t v_b0 = 0;
  uint32_t v_redir_top = 0;
  uint32_t v_redir_mask = 0;
  uint32_t v_b1 = 0;
  uint32_t v_length = 0;
  uint32_t v_b2 = 0;
  uint32_t v_b3 = 0;
  uint32_t v_b4 = 0;
  uint32_t v_dist_minus_1 = 0;
  uint32_t v_b5 = 0;
  uint32_t v_n_copied = 0;
  uint32_t v_hlen = 0;
  uint32_t v_hdist = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_huffman_slow;
  if (coro_susp_point) {
    v_bits = self->private_data.s_decode_huffman_slow.v_bits;
    v_n_bits = self->private_data.s_decode_huffman_slow.v_n_bits;
    v_table_entry_n_bits = self->private_data.s_decode_huffman_slow.v_table_entry_n_bits;
    v_lmask = self->private_data.s_decode_huffman_slow.v_lmask;
    v_dmask = self->private_data.s_decode_huffman_slow.v_dmask;
    v_redir_top = self->private_data.s_decode_huffman_slow.v_redir_top;
    v_redir_mask = self->private_data.s_decode_huffman_slow.v_redir_mask;
    v_length = self->private_data.s_decode_huffman_slow.v_length;
    v_dist_minus_1 = self->private_data.s_decode_huffman_slow.v_dist_minus_1;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if ((self->private_impl.f_n_bits >= 8u) || ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7u)) != 0u)) {
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
      goto exit;
    }
    v_bits = self->private_impl.f_bits;
    v_n_bits = self->private_impl.f_n_bits;
    v_lmask = ((((uint32_t)(1u)) << self->private_impl.f_n_huffs_bits[0u]) - 1u);
    v_dmask = ((((uint32_t)(1u)) << self->private_impl.f_n_huffs_bits[1u]) - 1u);
    label__loop__continue:;
    while ( ! (self->private_impl.p_decode_huffman_slow != 0)) {
      while (true) {
        v_table_entry = self->private_data.f_huffs[0u][(v_bits & v_lmask)];
        v_table_entry_n_bits = (v_table_entry & 15u);
        if (v_n_bits >= v_table_entry_n_bits) {
          v_bits >>= v_table_entry_n_bits;
          v_n_bits -= v_table_entry_n_bits;
          break;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint32_t t_0 = *iop_a_src++;
          v_b0 = t_0;
        }
        v_bits |= (v_b0 << v_n_bits);
        v_n_bits += 8u;
      }
      if ((v_table_entry >> 31u) != 0u) {
        self->private_data.s_decode_huffman_slow.scratch = ((uint8_t)((v_table_entry >> 8u)));
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        if (iop_a_dst == io2_a_dst) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_write);
          goto suspend;
        }
        *iop_a_dst++ = ((uint8_t)(self->private_data.s_decode_huffman_slow.scratch));
        continue;
      } else if ((v_table_entry >> 30u) != 0u) {
      } else if ((v_table_entry >> 29u) != 0u) {
        self->private_impl.f_end_of_block = true;
        break;
      } else if ((v_table_entry >> 28u) != 0u) {
        v_redir_top = ((v_table_entry >> 8u) & 65535u);
        v_redir_mask = ((((uint32_t)(1u)) << ((v_table_entry >> 4u) & 15u)) - 1u);
        while (true) {
          v_table_entry = self->private_data.f_huffs[0u][((v_redir_top + (v_bits & v_redir_mask)) & 1023u)];
          v_table_entry_n_bits = (v_table_entry & 15u);
          if (v_n_bits >= v_table_entry_n_bits) {
            v_bits >>= v_table_entry_n_bits;
            v_n_bits -= v_table_entry_n_bits;
            break;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint32_t t_1 = *iop_a_src++;
            v_b1 = t_1;
          }
          v_bits |= (v_b1 << v_n_bits);
          v_n_bits += 8u;
        }
        if ((v_table_entry >> 31u) != 0u) {
          self->private_data.s_decode_huffman_slow.scratch = ((uint8_t)((v_table_entry >> 8u)));
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          if (iop_a_dst == io2_a_dst) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_write);
            goto suspend;
          }
          *iop_a_dst++ = ((uint8_t)(self->private_data.s_decode_huffman_slow.scratch));
          continue;
        } else if ((v_table_entry >> 30u) != 0u) {
        } else if ((v_table_entry >> 29u) != 0u) {
          self->private_impl.f_end_of_block = true;
          break;
        } else if ((v_table_entry >> 28u) != 0u) {
          status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
          goto exit;
        } else if ((v_table_entry >> 27u) != 0u) {
          status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
          goto exit;
        } else {
          status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
          goto exit;
        }
      } else if ((v_table_entry >> 27u) != 0u) {
        status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
        goto exit;
      } else {
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      }
      v_length = (((v_table_entry >> 8u) & 255u) + 3u);
      v_table_entry_n_bits = ((v_table_entry >> 4u) & 15u);
      if (v_table_entry_n_bits > 0u) {
        while (v_n_bits < v_table_entry_n_bits) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint32_t t_2 = *iop_a_src++;
            v_b2 = t_2;
          }
          v_bits |= (v_b2 << v_n_bits);
          v_n_bits += 8u;
        }
        v_length = (((v_length + 253u + ((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & 255u) + 3u);
        v_bits >>= v_table_entry_n_bits;
        v_n_bits -= v_table_entry_n_bits;
      }
      while (true) {
        v_table_entry = self->private_data.f_huffs[1u][(v_bits & v_dmask)];
        v_table_entry_n_bits = (v_table_entry & 15u);
        if (v_n_bits >= v_table_entry_n_bits) {
          v_bits >>= v_table_entry_n_bits;
          v_n_bits -= v_table_entry_n_bits;
          break;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint32_t t_3 = *iop_a_src++;
          v_b3 = t_3;
        }
        v_bits |= (v_b3 << v_n_bits);
        v_n_bits += 8u;
      }
      if ((v_table_entry >> 28u) == 1u) {
        v_redir_top = ((v_table_entry >> 8u) & 65535u);
        v_redir_mask = ((((uint32_t)(1u)) << ((v_table_entry >> 4u) & 15u)) - 1u);
        while (true) {
          v_table_entry = self->private_data.f_huffs[1u][((v_redir_top + (v_bits & v_redir_mask)) & 1023u)];
          v_table_entry_n_bits = (v_table_entry & 15u);
          if (v_n_bits >= v_table_entry_n_bits) {
            v_bits >>= v_table_entry_n_bits;
            v_n_bits -= v_table_entry_n_bits;
            break;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint32_t t_4 = *iop_a_src++;
            v_b4 = t_4;
          }
          v_bits |= (v_b4 << v_n_bits);
          v_n_bits += 8u;
        }
      }
      if ((v_table_entry >> 24u) != 64u) {
        if ((v_table_entry >> 24u) == 8u) {
          status = wuffs_base__make_status(wuffs_deflate__error__bad_huffman_code);
          goto exit;
        }
        status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state);
        goto exit;
      }
      v_dist_minus_1 = ((v_table_entry >> 8u) & 32767u);
      v_table_entry_n_bits = ((v_table_entry >> 4u) & 15u);
      if (v_table_entry_n_bits > 0u) {
        while (v_n_bits < v_table_entry_n_bits) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint32_t t_5 = *iop_a_src++;
            v_b5 = t_5;
          }
          v_bits |= (v_b5 << v_n_bits);
          v_n_bits += 8u;
        }
        v_dist_minus_1 = ((v_dist_minus_1 + ((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & 32767u);
        v_bits >>= v_table_entry_n_bits;
        v_n_bits -= v_table_entry_n_bits;
      }
      while (true) {
        if (((uint64_t)((v_dist_minus_1 + 1u))) > ((uint64_t)(iop_a_dst - io0_a_dst))) {
          v_hdist = ((uint32_t)((((uint64_t)((v_dist_minus_1 + 1u))) - ((uint64_t)(iop_a_dst - io0_a_dst)))));
          if (v_hdist < v_length) {
            v_hlen = v_hdist;
          } else {
            v_hlen = v_length;
          }
          v_hdist += ((uint32_t)(((uint64_t)(self->private_impl.f_transformed_history_count - (a_dst ? a_dst->meta.pos : 0u)))));
          if (self->private_impl.f_history_index < v_hdist) {
            status = wuffs_base__make_status(wuffs_deflate__error__bad_distance);
            goto exit;
          }
          v_n_copied = wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
              &iop_a_dst, io2_a_dst,v_hlen, wuffs_base__make_slice_u8_ij(self->private_data.f_history, ((self->private_impl.f_history_index - v_hdist) & 32767u), 33025));
          if (v_n_copied < v_hlen) {
            v_length -= v_n_copied;
            status = wuffs_base__make_status(wuffs_base__suspension__short_write);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(9);
            continue;
          }
          v_length -= v_hlen;
          if (v_length == 0u) {
            goto label__loop__continue;
          }
        }
        v_n_copied = wuffs_private_impl__io_writer__limited_copy_u32_from_history(
            &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1u));
        if (v_length <= v_n_copied) {
          goto label__loop__continue;
        }
        v_length -= v_n_copied;
        status = wuffs_base__make_status(wuffs_base__suspension__short_write);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10);
      }
    }
    self->private_impl.f_bits = v_bits;
    self->private_impl.f_n_bits = v_n_bits;
    if ((self->private_impl.f_n_bits >= 8u) || ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7u)) != 0u)) {
      status = wuffs_base__make_status(wuffs_deflate__error__internal_error_inconsistent_n_bits);
      goto exit;
    }

    ok:
    self->private_impl.p_decode_huffman_slow = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_huffman_slow = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_huffman_slow.v_bits = v_bits;
  self->private_data.s_decode_huffman_slow.v_n_bits = v_n_bits;
  self->private_data.s_decode_huffman_slow.v_table_entry_n_bits = v_table_entry_n_bits;
  self->private_data.s_decode_huffman_slow.v_lmask = v_lmask;
  self->private_data.s_decode_huffman_slow.v_dmask = v_dmask;
  self->private_data.s_decode_huffman_slow.v_redir_top = v_redir_top;
  self->private_data.s_decode_huffman_slow.v_redir_mask = v_redir_mask;
  self->private_data.s_decode_huffman_slow.v_length = v_length;
  self->private_data.s_decode_huffman_slow.v_dist_minus_1 = v_dist_minus_1;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__DEFLATE)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ETC2)

// ---------------- Status Codes Implementations

const char wuffs_etc2__error__bad_header[] = "#etc2: bad header";
const char wuffs_etc2__error__truncated_input[] = "#etc2: truncated input";
const char wuffs_etc2__error__unsupported_etc2_file[] = "#etc2: unsupported ETC2 file";

// ---------------- Private Consts

static const uint32_t
WUFFS_ETC2__DIFFS[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 1u, 2u, 3u, 4294967292u, 4294967293u, 4294967294u, 4294967295u,
};

static const uint32_t
WUFFS_ETC2__MODIFIERS[16][4] WUFFS_BASE__POTENTIALLY_UNUSED = {
  {
    2u, 8u, 4294967294u, 4294967288u,
  }, {
    5u, 17u, 4294967291u, 4294967279u,
  }, {
    9u, 29u, 4294967287u, 4294967267u,
  }, {
    13u, 42u, 4294967283u, 4294967254u,
  }, {
    18u, 60u, 4294967278u, 4294967236u,
  }, {
    24u, 80u, 4294967272u, 4294967216u,
  }, {
    33u, 106u, 4294967263u, 4294967190u,
  }, {
    47u, 183u, 4294967249u, 4294967113u,
  },
  {
    0u, 8u, 0u, 4294967288u,
  }, {
    0u, 17u, 0u, 4294967279u,
  }, {
    0u, 29u, 0u, 4294967267u,
  }, {
    0u, 42u, 0u, 4294967254u,
  }, {
    0u, 60u, 0u, 4294967236u,
  }, {
    0u, 80u, 0u, 4294967216u,
  }, {
    0u, 106u, 0u, 4294967190u,
  }, {
    0u, 183u, 0u, 4294967113u,
  },
};

static const uint8_t
WUFFS_ETC2__T_H_MODIFIERS[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  3u, 6u, 11u, 16u, 23u, 32u, 41u, 64u,
};

static const uint32_t
WUFFS_ETC2__ALPHA_MODIFIERS[16][8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  {
    4294967293u, 4294967290u, 4294967287u, 4294967281u, 2u, 5u, 8u, 14u,
  }, {
    4294967293u, 4294967289u, 4294967286u, 4294967283u, 2u, 6u, 9u, 12u,
  }, {
    4294967294u, 4294967291u, 4294967288u, 4294967283u, 1u, 4u, 7u, 12u,
  }, {
    4294967294u, 4294967292u, 4294967290u, 4294967283u, 1u, 3u, 5u, 12u,
  }, {
    4294967293u, 4294967290u, 4294967288u, 4294967284u, 2u, 5u, 7u, 11u,
  }, {
    4294967293u, 4294967289u, 4294967287u, 4294967285u, 2u, 6u, 8u, 10u,
  }, {
    4294967292u, 4294967289u, 4294967288u, 4294967285u, 3u, 6u, 7u, 10u,
  }, {
    4294967293u, 4294967291u, 4294967288u, 4294967285u, 2u, 4u, 7u, 10u,
  },
  {
    4294967294u, 4294967290u, 4294967288u, 4294967286u, 1u, 5u, 7u, 9u,
  }, {
    4294967294u, 4294967291u, 4294967288u, 4294967286u, 1u, 4u, 7u, 9u,
  }, {
    4294967294u, 4294967292u, 4294967288u, 4294967286u, 1u, 3u, 7u, 9u,
  }, {
    4294967294u, 4294967291u, 4294967289u, 4294967286u, 1u, 4u, 6u, 9u,
  }, {
    4294967293u, 4294967292u, 4294967289u, 4294967286u, 2u, 3u, 6u, 9u,
  }, {
    4294967295u, 4294967294u, 4294967293u, 4294967286u, 0u, 1u, 2u, 9u,
  }, {
    4294967292u, 4294967290u, 4294967288u, 4294967287u, 3u, 5u, 7u, 8u,
  }, {
    4294967293u, 4294967291u, 4294967289u, 4294967287u, 2u, 4u, 6u, 8u,
  },
};

static const uint8_t
WUFFS_ETC2__CLAMP[1024] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 1u, 2u, 3u, 4u, 5u, 6u, 7u,
  8u, 9u, 10u, 11u, 12u, 13u, 14u, 15u,
  16u, 17u, 18u, 19u, 20u, 21u, 22u, 23u,
  24u, 25u, 26u, 27u, 28u, 29u, 30u, 31u,
  32u, 33u, 34u, 35u, 36u, 37u, 38u, 39u,
  40u, 41u, 42u, 43u, 44u, 45u, 46u, 47u,
  48u, 49u, 50u, 51u, 52u, 53u, 54u, 55u,
  56u, 57u, 58u, 59u, 60u, 61u, 62u, 63u,
  64u, 65u, 66u, 67u, 68u, 69u, 70u, 71u,
  72u, 73u, 74u, 75u, 76u, 77u, 78u, 79u,
  80u, 81u, 82u, 83u, 84u, 85u, 86u, 87u,
  88u, 89u, 90u, 91u, 92u, 93u, 94u, 95u,
  96u, 97u, 98u, 99u, 100u, 101u, 102u, 103u,
  104u, 105u, 106u, 107u, 108u, 109u, 110u, 111u,
  112u, 113u, 114u, 115u, 116u, 117u, 118u, 119u,
  120u, 121u, 122u, 123u, 124u, 125u, 126u, 127u,
  128u, 129u, 130u, 131u, 132u, 133u, 134u, 135u,
  136u, 137u, 138u, 139u, 140u, 141u, 142u, 143u,
  144u, 145u, 146u, 147u, 148u, 149u, 150u, 151u,
  152u, 153u, 154u, 155u, 156u, 157u, 158u, 159u,
  160u, 161u, 162u, 163u, 164u, 165u, 166u, 167u,
  168u, 169u, 170u, 171u, 172u, 173u, 174u, 175u,
  176u, 177u, 178u, 179u, 180u, 181u, 182u, 183u,
  184u, 185u, 186u, 187u, 188u, 189u, 190u, 191u,
  192u, 193u, 194u, 195u, 196u, 197u, 198u, 199u,
  200u, 201u, 202u, 203u, 204u, 205u, 206u, 207u,
  208u, 209u, 210u, 211u, 212u, 213u, 214u, 215u,
  216u, 217u, 218u, 219u, 220u, 221u, 222u, 223u,
  224u, 225u, 226u, 227u, 228u, 229u, 230u, 231u,
  232u, 233u, 234u, 235u, 236u, 237u, 238u, 239u,
  240u, 241u, 242u, 243u, 244u, 245u, 246u, 247u,
  248u, 249u, 250u, 251u, 252u, 253u, 254u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__do_decode_image_config(
    wuffs_etc2__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__do_decode_frame_config(
    wuffs_etc2__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__do_decode_frame(
    wuffs_etc2__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__from_src_to_colors(
    wuffs_etc2__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__from_colors_to_buffer(
    wuffs_etc2__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__decode_t_mode(
    wuffs_etc2__decoder* self,
    uint64_t a_bits,
    uint32_t a_offset,
    bool a_transparent);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__decode_h_mode(
    wuffs_etc2__decoder* self,
    uint64_t a_bits,
    uint32_t a_offset,
    bool a_transparent);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__decode_planar_mode(
    wuffs_etc2__decoder* self,
    uint64_t a_bits,
    uint32_t a_offset);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__decode_half_block(
    wuffs_etc2__decoder* self,
    uint32_t a_bits,
    uint32_t a_offset,
    uint32_t a_which,
    uint32_t a_r,
    uint32_t a_g,
    uint32_t a_b,
    bool a_flip,
    bool a_transparent,
    bool a_second);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__from_alphas_to_buffer(
    wuffs_etc2__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__from_buffer_to_dst(
    wuffs_etc2__decoder* self,
    wuffs_base__pixel_buffer* a_dst);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_etc2__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_etc2__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_etc2__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_etc2__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_etc2__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_etc2__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_etc2__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_etc2__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_etc2__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_etc2__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_etc2__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_etc2__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_etc2__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_etc2__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_etc2__decoder__initialize(
    wuffs_etc2__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_etc2__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_etc2__decoder*
wuffs_etc2__decoder__alloc(void) {
  wuffs_etc2__decoder* x =
      (wuffs_etc2__decoder*)(calloc(1, sizeof(wuffs_etc2__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_etc2__decoder__initialize(
      x, sizeof(wuffs_etc2__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_etc2__decoder(void) {
  return sizeof(wuffs_etc2__decoder);
}

// ---------------- Function Implementations

// -------- func etc2.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_etc2__decoder__get_quirk(
    const wuffs_etc2__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func etc2.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__set_quirk(
    wuffs_etc2__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func etc2.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__decode_image_config(
    wuffs_etc2__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_etc2__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_etc2__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func etc2.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__do_decode_image_config(
    wuffs_etc2__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_c32 = 0;
  uint16_t v_rounded_up_width = 0;
  uint16_t v_rounded_up_height = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  if (coro_susp_point) {
    v_rounded_up_width = self->private_data.s_do_decode_image_config.v_rounded_up_width;
    v_rounded_up_height = self->private_data.s_do_decode_image_config.v_rounded_up_height;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_c32 = t_0;
    }
    if (v_c32 != 541936464u) {
      status = wuffs_base__make_status(wuffs_etc2__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      v_c32 = t_1;
    }
    if ((v_c32 == 12337u) || (v_c32 == 16789554u) || (v_c32 == 151007282u)) {
      self->private_impl.f_pixfmt = 2415954056u;
    } else if ((v_c32 == 50343986u) || (v_c32 == 167784498u)) {
      self->private_impl.f_pixfmt = 2164295816u;
    } else if ((v_c32 == 67121202u) || (v_c32 == 184561714u)) {
      self->private_impl.f_pixfmt = 2197850248u;
    } else if ((v_c32 & 65535u) == 12338u) {
      status = wuffs_base__make_status(wuffs_etc2__error__unsupported_etc2_file);
      goto exit;
    } else {
      status = wuffs_base__make_status(wuffs_etc2__error__bad_header);
      goto exit;
    }
    self->private_impl.f_srgb = ((v_c32 >> 24u) >= 9u);
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      uint16_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_2 = wuffs_base__peek_u16be__no_bounds_check(iop_a_src);
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_2);
          if (num_bits_2 == 8) {
            t_2 = ((uint16_t)(*scratch >> 48));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2));
        }
      }
      v_rounded_up_width = t_2;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
      uint16_t t_3;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_3 = wuffs_base__peek_u16be__no_bounds_check(iop_a_src);
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_3 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_3);
          if (num_bits_3 == 8) {
            t_3 = ((uint16_t)(*scratch >> 48));
            break;
          }
          num_bits_3 += 8u;
          *scratch |= ((uint64_t)(num_bits_3));
        }
      }
      v_rounded_up_height = t_3;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
      uint32_t t_4;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_4 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_4 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_4);
          if (num_bits_4 == 8) {
            t_4 = ((uint32_t)(*scratch >> 48));
            break;
          }
          num_bits_4 += 8u;
          *scratch |= ((uint64_t)(num_bits_4));
        }
      }
      v_c32 = t_4;
    }
    if (((v_c32 + 3u) & 4294967292u) != ((uint32_t)(v_rounded_up_width))) {
      status = wuffs_base__make_status(wuffs_etc2__error__bad_header);
      goto exit;
    }
    self->private_impl.f_width = v_c32;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
      uint32_t t_5;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_5 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_5 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_5);
          if (num_bits_5 == 8) {
            t_5 = ((uint32_t)(*scratch >> 48));
            break;
          }
          num_bits_5 += 8u;
          *scratch |= ((uint64_t)(num_bits_5));
        }
      }
      v_c32 = t_5;
    }
    if (((v_c32 + 3u) & 4294967292u) != ((uint32_t)(v_rounded_up_height))) {
      status = wuffs_base__make_status(wuffs_etc2__error__bad_header);
      goto exit;
    }
    self->private_impl.f_height = v_c32;
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          self->private_impl.f_pixfmt,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          16u,
          (self->private_impl.f_pixfmt == 2415954056u));
    }
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_image_config.v_rounded_up_width = v_rounded_up_width;
  self->private_data.s_do_decode_image_config.v_rounded_up_height = v_rounded_up_height;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func etc2.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__decode_frame_config(
    wuffs_etc2__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_etc2__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_etc2__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func etc2.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__do_decode_frame_config(
    wuffs_etc2__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_etc2__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (16u != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          16u,
          0u,
          (self->private_impl.f_pixfmt == 2415954056u),
          false,
          4278190080u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func etc2.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__decode_frame(
    wuffs_etc2__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_etc2__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_etc2__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func etc2.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__do_decode_frame(
    wuffs_etc2__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_remaining = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  if (coro_susp_point) {
    v_remaining = self->private_data.s_do_decode_frame.v_remaining;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_etc2__decoder__do_decode_frame_config(self, NULL, a_src);
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette(a_dst),
        wuffs_base__utility__make_pixel_format(self->private_impl.f_pixfmt),
        wuffs_base__utility__empty_slice_u8(),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    self->private_impl.f_dst_x = 0u;
    self->private_impl.f_dst_y = 0u;
    v_remaining = (((self->private_impl.f_width + 3u) / 4u) * ((self->private_impl.f_height + 3u) / 4u));
    while (v_remaining > 0u) {
      self->private_impl.f_num_buffered_blocks = wuffs_base__u32__min(v_remaining, 64u);
      if (v_remaining < self->private_impl.f_num_buffered_blocks) {
        status = wuffs_base__make_status(wuffs_base__error__too_much_data);
        goto exit;
      }
      v_remaining -= self->private_impl.f_num_buffered_blocks;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      status = wuffs_etc2__decoder__from_src_to_colors(self, a_src);
      if (status.repr) {
        goto suspend;
      }
      wuffs_etc2__decoder__from_colors_to_buffer(self);
      if (self->private_impl.f_pixfmt == 2164295816u) {
        wuffs_etc2__decoder__from_alphas_to_buffer(self);
      }
      v_status = wuffs_etc2__decoder__from_buffer_to_dst(self, a_dst);
      if ( ! wuffs_base__status__is_ok(&v_status)) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      }
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_frame.v_remaining = v_remaining;

  goto exit;
  exit:
  return status;
}

// -------- func etc2.decoder.from_src_to_colors

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__from_src_to_colors(
    wuffs_etc2__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_bi = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_from_src_to_colors;
  if (coro_susp_point) {
    v_bi = self->private_data.s_from_src_to_colors.v_bi;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (v_bi < self->private_impl.f_num_buffered_blocks) {
      if (self->private_impl.f_pixfmt == 2164295816u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
          uint64_t t_0;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
            t_0 = wuffs_base__peek_u64be__no_bounds_check(iop_a_src);
            iop_a_src += 8;
          } else {
            self->private_data.s_from_src_to_colors.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_from_src_to_colors.scratch;
              uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
              if (num_bits_0 == 56) {
                t_0 = ((uint64_t)(*scratch >> 0));
                break;
              }
              num_bits_0 += 8u;
              *scratch |= ((uint64_t)(num_bits_0));
            }
          }
          self->private_data.f_alphas[v_bi] = t_0;
        }
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        uint64_t t_1;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
          t_1 = wuffs_base__peek_u64be__no_bounds_check(iop_a_src);
          iop_a_src += 8;
        } else {
          self->private_data.s_from_src_to_colors.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_from_src_to_colors.scratch;
            uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
            *scratch >>= 8;
            *scratch <<= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
            if (num_bits_1 == 56) {
              t_1 = ((uint64_t)(*scratch >> 0));
              break;
            }
            num_bits_1 += 8u;
            *scratch |= ((uint64_t)(num_bits_1));
          }
        }
        self->private_data.f_colors[v_bi] = t_1;
      }
      v_bi += 1u;
    }

    goto ok;
    ok:
    self->private_impl.p_from_src_to_colors = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_from_src_to_colors = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_from_src_to_colors.v_bi = v_bi;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func etc2.decoder.from_colors_to_buffer

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__from_colors_to_buffer(
    wuffs_etc2__decoder* self) {
  uint32_t v_bi = 0;
  uint64_t v_color = 0;
  uint32_t v_r0 = 0;
  uint32_t v_r1 = 0;
  uint32_t v_g0 = 0;
  uint32_t v_g1 = 0;
  uint32_t v_b0 = 0;
  uint32_t v_b1 = 0;
  bool v_diff = false;
  bool v_tran = false;
  bool v_flip = false;

  while (v_bi < self->private_impl.f_num_buffered_blocks) {
    v_color = self->private_data.f_colors[v_bi];
    v_diff = ((v_color & 8589934592u) != 0u);
    v_tran = ( ! v_diff && (self->private_impl.f_pixfmt == 2197850248u));
    if ( ! v_diff && (self->private_impl.f_pixfmt != 2197850248u)) {
      v_r0 = ((uint32_t)((15u & (v_color >> 60u))));
      v_r0 = ((v_r0 << 4u) | v_r0);
      v_r1 = ((uint32_t)((15u & (v_color >> 56u))));
      v_r1 = ((v_r1 << 4u) | v_r1);
      v_g0 = ((uint32_t)((15u & (v_color >> 52u))));
      v_g0 = ((v_g0 << 4u) | v_g0);
      v_g1 = ((uint32_t)((15u & (v_color >> 48u))));
      v_g1 = ((v_g1 << 4u) | v_g1);
      v_b0 = ((uint32_t)((15u & (v_color >> 44u))));
      v_b0 = ((v_b0 << 4u) | v_b0);
      v_b1 = ((uint32_t)((15u & (v_color >> 40u))));
      v_b1 = ((v_b1 << 4u) | v_b1);
    } else {
      v_r0 = ((uint32_t)((31u & (v_color >> 59u))));
      v_r1 = ((uint32_t)(v_r0 + WUFFS_ETC2__DIFFS[(7u & (v_color >> 56u))]));
      if ((v_r1 >> 5u) != 0u) {
        wuffs_etc2__decoder__decode_t_mode(self, v_color, (16u * v_bi), v_tran);
        v_bi += 1u;
        continue;
      }
      v_r0 = (((uint32_t)(v_r0 << 3u)) | (v_r0 >> 2u));
      v_r1 = (((uint32_t)(v_r1 << 3u)) | (v_r1 >> 2u));
      v_g0 = ((uint32_t)((31u & (v_color >> 51u))));
      v_g1 = ((uint32_t)(v_g0 + WUFFS_ETC2__DIFFS[(7u & (v_color >> 48u))]));
      if ((v_g1 >> 5u) != 0u) {
        wuffs_etc2__decoder__decode_h_mode(self, v_color, (16u * v_bi), v_tran);
        v_bi += 1u;
        continue;
      }
      v_g0 = (((uint32_t)(v_g0 << 3u)) | (v_g0 >> 2u));
      v_g1 = (((uint32_t)(v_g1 << 3u)) | (v_g1 >> 2u));
      v_b0 = ((uint32_t)((31u & (v_color >> 43u))));
      v_b1 = ((uint32_t)(v_b0 + WUFFS_ETC2__DIFFS[(7u & (v_color >> 40u))]));
      if ((v_b1 >> 5u) != 0u) {
        wuffs_etc2__decoder__decode_planar_mode(self, v_color, (16u * v_bi));
        v_bi += 1u;
        continue;
      }
      v_b0 = (((uint32_t)(v_b0 << 3u)) | (v_b0 >> 2u));
      v_b1 = (((uint32_t)(v_b1 << 3u)) | (v_b1 >> 2u));
    }
    v_flip = ((v_color & 4294967296u) != 0u);
    wuffs_etc2__decoder__decode_half_block(self,
        ((uint32_t)(v_color)),
        (16u * v_bi),
        ((uint32_t)(((v_color >> 37u) & 7u))),
        v_r0,
        v_g0,
        v_b0,
        v_flip,
        v_tran,
        false);
    wuffs_etc2__decoder__decode_half_block(self,
        ((uint32_t)(v_color)),
        (16u * v_bi),
        ((uint32_t)(((v_color >> 34u) & 7u))),
        v_r1,
        v_g1,
        v_b1,
        v_flip,
        v_tran,
        true);
    v_bi += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func etc2.decoder.decode_t_mode

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__decode_t_mode(
    wuffs_etc2__decoder* self,
    uint64_t a_bits,
    uint32_t a_offset,
    bool a_transparent) {
  uint8_t v_r[4] = {0};
  uint8_t v_g[4] = {0};
  uint8_t v_b[4] = {0};
  uint8_t v_a[4] = {0};
  uint32_t v_which = 0;
  uint32_t v_delta = 0;
  uint32_t v_y = 0;
  uint32_t v_x = 0;
  uint32_t v_x4y = 0;
  uint32_t v_index = 0;
  uint32_t v_o = 0;

  v_r[0u] = ((uint8_t)(((uint8_t)((12u & (a_bits >> 57u)))) | ((uint8_t)((3u & (a_bits >> 56u))))));
  v_r[0u] = ((uint8_t)(((uint8_t)(v_r[0u] << 4u)) | v_r[0u]));
  v_g[0u] = ((uint8_t)((15u & (a_bits >> 52u))));
  v_g[0u] = ((uint8_t)(((uint8_t)(v_g[0u] << 4u)) | v_g[0u]));
  v_b[0u] = ((uint8_t)((15u & (a_bits >> 48u))));
  v_b[0u] = ((uint8_t)(((uint8_t)(v_b[0u] << 4u)) | v_b[0u]));
  v_a[0u] = 255u;
  v_r[2u] = ((uint8_t)((15u & (a_bits >> 44u))));
  v_r[2u] = ((uint8_t)(((uint8_t)(v_r[2u] << 4u)) | v_r[2u]));
  v_g[2u] = ((uint8_t)((15u & (a_bits >> 40u))));
  v_g[2u] = ((uint8_t)(((uint8_t)(v_g[2u] << 4u)) | v_g[2u]));
  v_b[2u] = ((uint8_t)((15u & (a_bits >> 36u))));
  v_b[2u] = ((uint8_t)(((uint8_t)(v_b[2u] << 4u)) | v_b[2u]));
  v_a[2u] = 255u;
  v_which = (((uint32_t)((6u & (a_bits >> 33u)))) | ((uint32_t)((1u & (a_bits >> 32u)))));
  v_delta = ((uint32_t)(WUFFS_ETC2__T_H_MODIFIERS[v_which]));
  v_r[1u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_r[2u])) + v_delta)) & 1023u)];
  v_g[1u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_g[2u])) + v_delta)) & 1023u)];
  v_b[1u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_b[2u])) + v_delta)) & 1023u)];
  v_a[1u] = 255u;
  v_r[3u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_r[2u])) - v_delta)) & 1023u)];
  v_g[3u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_g[2u])) - v_delta)) & 1023u)];
  v_b[3u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_b[2u])) - v_delta)) & 1023u)];
  v_a[3u] = 255u;
  if (a_transparent) {
    v_r[2u] = 0u;
    v_g[2u] = 0u;
    v_b[2u] = 0u;
    v_a[2u] = 0u;
  }
  while (v_y < 4u) {
    v_x = 0u;
    while (v_x < 4u) {
      v_x4y = ((v_x * 4u) | v_y);
      v_index = (((uint32_t)(((a_bits >> v_x4y) & 1u))) | ((uint32_t)(((a_bits >> (v_x4y + 15u)) & 2u))));
      v_o = (a_offset + (v_x * 4u) + (v_y * 1024u));
      self->private_data.f_buffer[(v_o + 0u)] = v_b[v_index];
      self->private_data.f_buffer[(v_o + 1u)] = v_g[v_index];
      self->private_data.f_buffer[(v_o + 2u)] = v_r[v_index];
      self->private_data.f_buffer[(v_o + 3u)] = v_a[v_index];
      v_x += 1u;
    }
    v_y += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func etc2.decoder.decode_h_mode

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__decode_h_mode(
    wuffs_etc2__decoder* self,
    uint64_t a_bits,
    uint32_t a_offset,
    bool a_transparent) {
  uint8_t v_r[4] = {0};
  uint8_t v_g[4] = {0};
  uint8_t v_b[4] = {0};
  uint8_t v_a[4] = {0};
  uint32_t v_rgb0 = 0;
  uint32_t v_rgb2 = 0;
  uint32_t v_which = 0;
  uint32_t v_delta = 0;
  uint32_t v_y = 0;
  uint32_t v_x = 0;
  uint32_t v_x4y = 0;
  uint32_t v_index = 0;
  uint32_t v_o = 0;

  v_r[0u] = ((uint8_t)((15u & (a_bits >> 59u))));
  v_r[0u] = ((uint8_t)(((uint8_t)(v_r[0u] << 4u)) | v_r[0u]));
  v_g[0u] = ((uint8_t)(((uint8_t)((14u & (a_bits >> 55u)))) | ((uint8_t)((1u & (a_bits >> 52u))))));
  v_g[0u] = ((uint8_t)(((uint8_t)(v_g[0u] << 4u)) | v_g[0u]));
  v_b[0u] = ((uint8_t)(((uint8_t)((8u & (a_bits >> 48u)))) | ((uint8_t)((7u & (a_bits >> 47u))))));
  v_b[0u] = ((uint8_t)(((uint8_t)(v_b[0u] << 4u)) | v_b[0u]));
  v_r[2u] = ((uint8_t)((15u & (a_bits >> 43u))));
  v_r[2u] = ((uint8_t)(((uint8_t)(v_r[2u] << 4u)) | v_r[2u]));
  v_g[2u] = ((uint8_t)((15u & (a_bits >> 39u))));
  v_g[2u] = ((uint8_t)(((uint8_t)(v_g[2u] << 4u)) | v_g[2u]));
  v_b[2u] = ((uint8_t)((15u & (a_bits >> 35u))));
  v_b[2u] = ((uint8_t)(((uint8_t)(v_b[2u] << 4u)) | v_b[2u]));
  v_rgb0 = ((((uint32_t)(v_r[0u])) << 16u) | (((uint32_t)(v_g[0u])) << 8u) | (((uint32_t)(v_b[0u])) << 0u));
  v_rgb2 = ((((uint32_t)(v_r[2u])) << 16u) | (((uint32_t)(v_g[2u])) << 8u) | (((uint32_t)(v_b[2u])) << 0u));
  v_which = (((uint32_t)((4u & (a_bits >> 32u)))) | ((uint32_t)((2u & (a_bits >> 31u)))));
  if (v_rgb0 >= v_rgb2) {
    v_which |= 1u;
  }
  v_delta = ((uint32_t)(WUFFS_ETC2__T_H_MODIFIERS[v_which]));
  v_r[1u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_r[0u])) - v_delta)) & 1023u)];
  v_g[1u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_g[0u])) - v_delta)) & 1023u)];
  v_b[1u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_b[0u])) - v_delta)) & 1023u)];
  v_a[1u] = 255u;
  v_r[0u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_r[0u])) + v_delta)) & 1023u)];
  v_g[0u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_g[0u])) + v_delta)) & 1023u)];
  v_b[0u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_b[0u])) + v_delta)) & 1023u)];
  v_a[0u] = 255u;
  v_r[3u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_r[2u])) - v_delta)) & 1023u)];
  v_g[3u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_g[2u])) - v_delta)) & 1023u)];
  v_b[3u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_b[2u])) - v_delta)) & 1023u)];
  v_a[3u] = 255u;
  v_r[2u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_r[2u])) + v_delta)) & 1023u)];
  v_g[2u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_g[2u])) + v_delta)) & 1023u)];
  v_b[2u] = WUFFS_ETC2__CLAMP[(((uint32_t)(((uint32_t)(v_b[2u])) + v_delta)) & 1023u)];
  v_a[2u] = 255u;
  if (a_transparent) {
    v_r[2u] = 0u;
    v_g[2u] = 0u;
    v_b[2u] = 0u;
    v_a[2u] = 0u;
  }
  while (v_y < 4u) {
    v_x = 0u;
    while (v_x < 4u) {
      v_x4y = ((v_x * 4u) | v_y);
      v_index = (((uint32_t)(((a_bits >> v_x4y) & 1u))) | ((uint32_t)(((a_bits >> (v_x4y + 15u)) & 2u))));
      v_o = (a_offset + (v_x * 4u) + (v_y * 1024u));
      self->private_data.f_buffer[(v_o + 0u)] = v_b[v_index];
      self->private_data.f_buffer[(v_o + 1u)] = v_g[v_index];
      self->private_data.f_buffer[(v_o + 2u)] = v_r[v_index];
      self->private_data.f_buffer[(v_o + 3u)] = v_a[v_index];
      v_x += 1u;
    }
    v_y += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func etc2.decoder.decode_planar_mode

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__decode_planar_mode(
    wuffs_etc2__decoder* self,
    uint64_t a_bits,
    uint32_t a_offset) {
  uint32_t v_ro = 0;
  uint32_t v_go = 0;
  uint32_t v_bo = 0;
  uint32_t v_rh = 0;
  uint32_t v_gh = 0;
  uint32_t v_bh = 0;
  uint32_t v_rv = 0;
  uint32_t v_gv = 0;
  uint32_t v_bv = 0;
  uint32_t v_y = 0;
  uint32_t v_x = 0;
  uint32_t v_o = 0;
  uint32_t v_rp = 0;
  uint32_t v_gp = 0;
  uint32_t v_bp = 0;

  v_ro = ((uint32_t)((63u & (a_bits >> 57u))));
  v_ro = (((uint32_t)(v_ro << 2u)) | (v_ro >> 4u));
  v_go = (((uint32_t)((64u & (a_bits >> 50u)))) | ((uint32_t)((63u & (a_bits >> 49u)))));
  v_go = (((uint32_t)(v_go << 1u)) | (v_go >> 6u));
  v_bo = (((uint32_t)((32u & (a_bits >> 43u)))) | ((uint32_t)((24u & (a_bits >> 40u)))) | ((uint32_t)((7u & (a_bits >> 39u)))));
  v_bo = (((uint32_t)(v_bo << 2u)) | (v_bo >> 4u));
  v_rh = (((uint32_t)((62u & (a_bits >> 33u)))) | ((uint32_t)((1u & (a_bits >> 32u)))));
  v_rh = (((uint32_t)(v_rh << 2u)) | (v_rh >> 4u));
  v_gh = ((uint32_t)((127u & (a_bits >> 25u))));
  v_gh = (((uint32_t)(v_gh << 1u)) | (v_gh >> 6u));
  v_bh = ((uint32_t)((63u & (a_bits >> 19u))));
  v_bh = (((uint32_t)(v_bh << 2u)) | (v_bh >> 4u));
  v_rv = ((uint32_t)((63u & (a_bits >> 13u))));
  v_rv = (((uint32_t)(v_rv << 2u)) | (v_rv >> 4u));
  v_gv = ((uint32_t)((127u & (a_bits >> 6u))));
  v_gv = (((uint32_t)(v_gv << 1u)) | (v_gv >> 6u));
  v_bv = ((uint32_t)((63u & (a_bits >> 0u))));
  v_bv = (((uint32_t)(v_bv << 2u)) | (v_bv >> 4u));
  v_rh -= v_ro;
  v_gh -= v_go;
  v_bh -= v_bo;
  v_rv -= v_ro;
  v_gv -= v_go;
  v_bv -= v_bo;
  v_ro *= 4u;
  v_go *= 4u;
  v_bo *= 4u;
  while (v_y < 4u) {
    v_x = 0u;
    while (v_x < 4u) {
      v_o = (a_offset + (v_x * 4u) + (v_y * 1024u));
      v_bp = ((uint32_t)(((uint32_t)(((uint32_t)(v_x * v_bh)) + ((uint32_t)(v_y * v_bv)))) + v_bo));
      self->private_data.f_buffer[(v_o + 0u)] = WUFFS_ETC2__CLAMP[((((uint32_t)(v_bp + 2u)) / 4u) & 1023u)];
      v_gp = ((uint32_t)(((uint32_t)(((uint32_t)(v_x * v_gh)) + ((uint32_t)(v_y * v_gv)))) + v_go));
      self->private_data.f_buffer[(v_o + 1u)] = WUFFS_ETC2__CLAMP[((((uint32_t)(v_gp + 2u)) / 4u) & 1023u)];
      v_rp = ((uint32_t)(((uint32_t)(((uint32_t)(v_x * v_rh)) + ((uint32_t)(v_y * v_rv)))) + v_ro));
      self->private_data.f_buffer[(v_o + 2u)] = WUFFS_ETC2__CLAMP[((((uint32_t)(v_rp + 2u)) / 4u) & 1023u)];
      v_x += 1u;
      self->private_data.f_buffer[(v_o + 3u)] = 255u;
    }
    v_y += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func etc2.decoder.decode_half_block

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__decode_half_block(
    wuffs_etc2__decoder* self,
    uint32_t a_bits,
    uint32_t a_offset,
    uint32_t a_which,
    uint32_t a_r,
    uint32_t a_g,
    uint32_t a_b,
    bool a_flip,
    bool a_transparent,
    bool a_second) {
  uint32_t v_which = 0;
  uint32_t v_x0 = 0;
  uint32_t v_y0 = 0;
  uint32_t v_x = 0;
  uint32_t v_y = 0;
  uint32_t v_i = 0;
  uint32_t v_x4y = 0;
  uint32_t v_index = 0;
  uint32_t v_modif = 0;
  uint32_t v_o = 0;

  v_which = a_which;
  if (a_transparent) {
    v_which |= 8u;
  }
  if ( ! a_second) {
  } else if (a_flip) {
    v_y0 = 2u;
  } else {
    v_x0 = 2u;
  }
  while (v_i < 8u) {
    if (a_flip) {
      v_x = ((v_x0 + (v_i / 2u)) & 3u);
      v_y = (v_y0 + (v_i & 1u));
    } else {
      v_x = (v_x0 + (v_i / 4u));
      v_y = ((v_y0 + v_i) & 3u);
    }
    v_x4y = ((v_x * 4u) | v_y);
    v_index = (((a_bits >> v_x4y) & 1u) | ((a_bits >> (v_x4y + 15u)) & 2u));
    v_modif = WUFFS_ETC2__MODIFIERS[v_which][v_index];
    v_o = (a_offset + (v_x * 4u) + (v_y * 1024u));
    if (a_transparent && (v_index == 2u)) {
      self->private_data.f_buffer[(v_o + 0u)] = 0u;
      self->private_data.f_buffer[(v_o + 1u)] = 0u;
      self->private_data.f_buffer[(v_o + 2u)] = 0u;
      self->private_data.f_buffer[(v_o + 3u)] = 0u;
    } else {
      self->private_data.f_buffer[(v_o + 0u)] = WUFFS_ETC2__CLAMP[(((uint32_t)(a_b + v_modif)) & 1023u)];
      self->private_data.f_buffer[(v_o + 1u)] = WUFFS_ETC2__CLAMP[(((uint32_t)(a_g + v_modif)) & 1023u)];
      self->private_data.f_buffer[(v_o + 2u)] = WUFFS_ETC2__CLAMP[(((uint32_t)(a_r + v_modif)) & 1023u)];
      self->private_data.f_buffer[(v_o + 3u)] = 255u;
    }
    v_i += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func etc2.decoder.from_alphas_to_buffer

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_etc2__decoder__from_alphas_to_buffer(
    wuffs_etc2__decoder* self) {
  uint32_t v_bi = 0;
  uint64_t v_alpha = 0;
  uint32_t v_a0 = 0;
  uint32_t v_multiplier = 0;
  uint32_t v_which = 0;
  uint32_t v_offset = 0;
  uint32_t v_y = 0;
  uint32_t v_x = 0;
  uint32_t v_shift = 0;
  uint32_t v_delta = 0;
  uint32_t v_o = 0;

  while (v_bi < self->private_impl.f_num_buffered_blocks) {
    v_alpha = self->private_data.f_alphas[v_bi];
    v_a0 = ((uint32_t)((v_alpha >> 56u)));
    v_multiplier = ((uint32_t)(((v_alpha >> 52u) & 15u)));
    v_which = ((uint32_t)(((v_alpha >> 48u) & 15u)));
    v_offset = (16u * v_bi);
    v_y = 0u;
    while (v_y < 4u) {
      v_x = 0u;
      while (v_x < 4u) {
        v_shift = ((((v_x ^ 3u) * 4u) | (v_y ^ 3u)) * 3u);
        v_delta = ((uint32_t)(v_multiplier * WUFFS_ETC2__ALPHA_MODIFIERS[v_which][(7u & (v_alpha >> v_shift))]));
        v_o = (v_offset + (v_x * 4u) + (v_y * 1024u));
        self->private_data.f_buffer[(v_o + 3u)] = WUFFS_ETC2__CLAMP[(((uint32_t)(v_a0 + v_delta)) & 1023u)];
        v_x += 1u;
      }
      v_y += 1u;
    }
    v_bi += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func etc2.decoder.from_buffer_to_dst

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_etc2__decoder__from_buffer_to_dst(
    wuffs_etc2__decoder* self,
    wuffs_base__pixel_buffer* a_dst) {
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  wuffs_base__table_u8 v_tab = {0};
  uint32_t v_bi = 0;
  uint32_t v_rem_x = 0;
  uint32_t v_dy = 0;
  wuffs_base__slice_u8 v_dst = {0};
  wuffs_base__slice_u8 v_src = {0};
  uint32_t v_si = 0;
  uint32_t v_sj = 0;
  uint64_t v_i = 0;
  uint32_t v_num_src_pixels = 0;

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  while (v_bi < self->private_impl.f_num_buffered_blocks) {
    if (self->private_impl.f_width <= self->private_impl.f_dst_x) {
      self->private_impl.f_dst_x = 0u;
      self->private_impl.f_dst_y += 4u;
      if (self->private_impl.f_dst_y >= self->private_impl.f_height) {
        break;
      }
      v_rem_x = self->private_impl.f_width;
    } else {
      v_rem_x = (self->private_impl.f_width - self->private_impl.f_dst_x);
    }
    v_dy = 0u;
    while (v_dy < 4u) {
      v_si = ((1024u * v_dy) + (16u * v_bi));
      v_sj = ((1024u * v_dy) + 1024u);
      if (v_si < v_sj) {
        v_src = wuffs_base__make_slice_u8_ij(self->private_data.f_buffer, v_si, v_sj);
      }
      if (((uint64_t)((4u * v_rem_x))) < ((uint64_t)(v_src.len))) {
        v_src = wuffs_base__slice_u8__subslice_j(v_src, ((uint64_t)((4u * v_rem_x))));
      }
      if (((uint32_t)(self->private_impl.f_dst_y + v_dy)) >= self->private_impl.f_height) {
        break;
      }
      v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, ((uint32_t)(self->private_impl.f_dst_y + v_dy)));
      if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
        v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
      }
      v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_dst_bytes_per_pixel)));
      if (v_i < ((uint64_t)(v_dst.len))) {
        wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), wuffs_base__pixel_buffer__palette(a_dst), v_src);
      }
      v_dy += 1u;
    }
    v_num_src_pixels = (((uint32_t)(((uint64_t)(v_src.len)))) / 4u);
    self->private_impl.f_dst_x += v_num_src_pixels;
    v_bi += ((v_num_src_pixels + 3u) / 4u);
  }
  return wuffs_base__make_status(NULL);
}

// -------- func etc2.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_etc2__decoder__frame_dirty_rect(
    const wuffs_etc2__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func etc2.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_etc2__decoder__num_animation_loops(
    const wuffs_etc2__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func etc2.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_etc2__decoder__num_decoded_frame_configs(
    const wuffs_etc2__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func etc2.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_etc2__decoder__num_decoded_frames(
    const wuffs_etc2__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func etc2.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__restart_frame(
    wuffs_etc2__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if ((a_index != 0u) || (a_io_position != 16u)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  return wuffs_base__make_status(NULL);
}

// -------- func etc2.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_etc2__decoder__set_report_metadata(
    wuffs_etc2__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func etc2.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_etc2__decoder__tell_me_more(
    wuffs_etc2__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func etc2.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_etc2__decoder__workbuf_len(
    const wuffs_etc2__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ETC2)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GIF)

// ---------------- Status Codes Implementations

const char wuffs_gif__error__bad_lzw_code[] = "#gif: bad LZW code";
const char wuffs_gif__error__bad_extension_label[] = "#gif: bad extension label";
const char wuffs_gif__error__bad_frame_size[] = "#gif: bad frame size";
const char wuffs_gif__error__bad_graphic_control[] = "#gif: bad graphic control";
const char wuffs_gif__error__bad_header[] = "#gif: bad header";
const char wuffs_gif__error__bad_literal_width[] = "#gif: bad literal width";
const char wuffs_gif__error__bad_palette[] = "#gif: bad palette";
const char wuffs_gif__error__truncated_input[] = "#gif: truncated input";
const char wuffs_gif__error__internal_error_inconsistent_i_o[] = "#gif: internal error: inconsistent I/O";

// ---------------- Private Consts

static const uint32_t
WUFFS_GIF__INTERLACE_START[5] WUFFS_BASE__POTENTIALLY_UNUSED = {
  4294967295u, 1u, 2u, 4u, 0u,
};

static const uint8_t
WUFFS_GIF__INTERLACE_DELTA[5] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1u, 2u, 4u, 8u, 8u,
};

static const uint8_t
WUFFS_GIF__INTERLACE_COUNT[5] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 1u, 2u, 4u, 8u,
};

static const uint8_t
WUFFS_GIF__ANIMEXTS1DOT0[11] WUFFS_BASE__POTENTIALLY_UNUSED = {
  65u, 78u, 73u, 77u, 69u, 88u, 84u, 83u,
  49u, 46u, 48u,
};

static const uint8_t
WUFFS_GIF__NETSCAPE2DOT0[11] WUFFS_BASE__POTENTIALLY_UNUSED = {
  78u, 69u, 84u, 83u, 67u, 65u, 80u, 69u,
  50u, 46u, 48u,
};

static const uint8_t
WUFFS_GIF__ICCRGBG1012[11] WUFFS_BASE__POTENTIALLY_UNUSED = {
  73u, 67u, 67u, 82u, 71u, 66u, 71u, 49u,
  48u, 49u, 50u,
};

static const uint8_t
WUFFS_GIF__XMPDATAXMP[11] WUFFS_BASE__POTENTIALLY_UNUSED = {
  88u, 77u, 80u, 32u, 68u, 97u, 116u, 97u,
  88u, 77u, 80u,
};

#define WUFFS_GIF__QUIRKS_BASE 983928832u

#define WUFFS_GIF__QUIRKS_COUNT 7u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__do_decode_image_config(
    wuffs_gif__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__do_tell_me_more(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__do_decode_frame_config(
    wuffs_gif__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__skip_frame(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__do_decode_frame(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_gif__decoder__reset_gc(
    wuffs_gif__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_up_to_id_part1(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_header(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_lsd(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_extension(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__skip_blocks(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_ae(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_gc(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_id_part0(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_id_part1(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_id_part2(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__copy_to_image_buffer(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_pb,
    wuffs_base__slice_u8 a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_gif__decoder__lzw_init(
    wuffs_gif__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_gif__decoder__lzw_read_from(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_gif__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_gif__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_gif__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_gif__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_gif__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_gif__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_gif__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_gif__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_gif__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_gif__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_gif__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_gif__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_gif__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_gif__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_gif__decoder__initialize(
    wuffs_gif__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_gif__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_gif__decoder*
wuffs_gif__decoder__alloc(void) {
  wuffs_gif__decoder* x =
      (wuffs_gif__decoder*)(calloc(1, sizeof(wuffs_gif__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_gif__decoder__initialize(
      x, sizeof(wuffs_gif__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_gif__decoder(void) {
  return sizeof(wuffs_gif__decoder);
}

// ---------------- Function Implementations

// -------- func gif.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_gif__decoder__get_quirk(
    const wuffs_gif__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  uint32_t v_key = 0;

  if (a_key >= 983928832u) {
    v_key = (a_key - 983928832u);
    if (v_key < 7u) {
      if (self->private_impl.f_quirks[v_key]) {
        return 1u;
      }
    }
  }
  return 0u;
}

// -------- func gif.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__set_quirk(
    wuffs_gif__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if ((self->private_impl.f_call_sequence == 0u) && (a_key >= 983928832u)) {
    a_key -= 983928832u;
    if (a_key < 7u) {
      self->private_impl.f_quirks[a_key] = (a_value > 0u);
      return wuffs_base__make_status(NULL);
    }
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func gif.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__decode_image_config(
    wuffs_gif__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_gif__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_gif__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func gif.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__do_decode_image_config(
    wuffs_gif__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  bool v_ffio = false;

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    } else if ( ! self->private_impl.f_seen_header) {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_gif__decoder__decode_header(self, a_src);
      if (status.repr) {
        goto suspend;
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      status = wuffs_gif__decoder__decode_lsd(self, a_src);
      if (status.repr) {
        goto suspend;
      }
      self->private_impl.f_seen_header = true;
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
    status = wuffs_gif__decoder__decode_up_to_id_part1(self, a_src);
    if (status.repr) {
      goto suspend;
    }
    v_ffio =  ! self->private_impl.f_gc_has_transparent_index;
    if ( ! self->private_impl.f_quirks[2u]) {
      v_ffio = (v_ffio &&
          (self->private_impl.f_frame_rect_x0 == 0u) &&
          (self->private_impl.f_frame_rect_y0 == 0u) &&
          (self->private_impl.f_frame_rect_x1 == self->private_impl.f_width) &&
          (self->private_impl.f_frame_rect_y1 == self->private_impl.f_height));
    } else if (v_ffio) {
      self->private_impl.f_black_color_u32_argb_premul = 4278190080u;
    }
    if (self->private_impl.f_background_color_u32_argb_premul == 77u) {
      self->private_impl.f_background_color_u32_argb_premul = self->private_impl.f_black_color_u32_argb_premul;
    }
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          2198077448u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          self->private_impl.f_frame_config_io_position,
          v_ffio);
    }
    if (self->private_impl.f_call_sequence == 0u) {
      self->private_impl.f_call_sequence = 32u;
    }

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  return status;
}

// -------- func gif.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_gif__decoder__set_report_metadata(
    wuffs_gif__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  if (a_fourcc == 1229144912u) {
    self->private_impl.f_report_metadata_iccp = a_report;
  } else if (a_fourcc == 1481461792u) {
    self->private_impl.f_report_metadata_xmp = a_report;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func gif.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__tell_me_more(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_tell_me_more;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_gif__decoder__do_tell_me_more(self, a_dst, a_minfo, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_gif__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_tell_me_more = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_tell_me_more = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func gif.decoder.do_tell_me_more

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__do_tell_me_more(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_chunk_length = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_tell_me_more;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (((uint8_t)(self->private_impl.f_call_sequence & 16u)) == 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    if (self->private_impl.f_metadata_fourcc == 0u) {
      status = wuffs_base__make_status(wuffs_base__error__no_more_information);
      goto exit;
    }
    while (true) {
      while (true) {
        if (wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src))) != self->private_impl.f_metadata_io_position) {
          if (a_minfo != NULL) {
            wuffs_base__more_information__set(a_minfo,
                2u,
                0u,
                self->private_impl.f_metadata_io_position,
                0u,
                0u);
          }
          status = wuffs_base__make_status(wuffs_base__suspension__mispositioned_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
          continue;
        }
        if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
          if (a_minfo != NULL) {
            wuffs_base__more_information__set(a_minfo,
                0u,
                0u,
                0u,
                0u,
                0u);
          }
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
          continue;
        }
        break;
      }
      v_chunk_length = ((uint64_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src)));
      if (v_chunk_length <= 0u) {
        iop_a_src += 1u;
        break;
      }
      if (self->private_impl.f_metadata_fourcc == 1481461792u) {
        v_chunk_length += 1u;
      } else {
        iop_a_src += 1u;
      }
      self->private_impl.f_metadata_io_position = wuffs_base__u64__sat_add(wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src))), v_chunk_length);
      if (a_minfo != NULL) {
        wuffs_base__more_information__set(a_minfo,
            3u,
            self->private_impl.f_metadata_fourcc,
            0u,
            wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src))),
            self->private_impl.f_metadata_io_position);
      }
      status = wuffs_base__make_status(wuffs_base__suspension__even_more_information);
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
    }
    if (a_minfo != NULL) {
      wuffs_base__more_information__set(a_minfo,
          3u,
          self->private_impl.f_metadata_fourcc,
          0u,
          self->private_impl.f_metadata_io_position,
          self->private_impl.f_metadata_io_position);
    }
    self->private_impl.f_call_sequence &= 239u;
    self->private_impl.f_metadata_fourcc = 0u;
    self->private_impl.f_metadata_io_position = 0u;
    status = wuffs_base__make_status(NULL);
    goto ok;

    ok:
    self->private_impl.p_do_tell_me_more = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_tell_me_more = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_gif__decoder__num_animation_loops(
    const wuffs_gif__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_seen_num_animation_loops_value) {
    return self->private_impl.f_num_animation_loops_value;
  }
  if (self->private_impl.f_num_decoded_frame_configs_value > 1u) {
    return 1u;
  }
  return 0u;
}

// -------- func gif.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_gif__decoder__num_decoded_frame_configs(
    const wuffs_gif__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return self->private_impl.f_num_decoded_frame_configs_value;
}

// -------- func gif.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_gif__decoder__num_decoded_frames(
    const wuffs_gif__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return self->private_impl.f_num_decoded_frames_value;
}

// -------- func gif.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_gif__decoder__frame_dirty_rect(
    const wuffs_gif__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      wuffs_base__u32__min(self->private_impl.f_frame_rect_x0, self->private_impl.f_width),
      wuffs_base__u32__min(self->private_impl.f_frame_rect_y0, self->private_impl.f_height),
      wuffs_base__u32__min(self->private_impl.f_frame_rect_x1, self->private_impl.f_width),
      wuffs_base__u32__min(self->private_impl.f_dirty_max_excl_y, self->private_impl.f_height));
}

// -------- func gif.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_gif__decoder__workbuf_len(
    const wuffs_gif__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

// -------- func gif.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__restart_frame(
    wuffs_gif__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  } else if (a_io_position == 0u) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_delayed_num_decoded_frames = false;
  self->private_impl.f_frame_config_io_position = a_io_position;
  self->private_impl.f_num_decoded_frame_configs_value = a_index;
  self->private_impl.f_num_decoded_frames_value = a_index;
  wuffs_gif__decoder__reset_gc(self);
  self->private_impl.f_call_sequence = 40u;
  return wuffs_base__make_status(NULL);
}

// -------- func gif.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__decode_frame_config(
    wuffs_gif__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_gif__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_gif__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func gif.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__do_decode_frame_config(
    wuffs_gif__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_background_color = 0;
  uint8_t v_flags = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  if (coro_susp_point) {
    v_background_color = self->private_data.s_do_decode_frame_config.v_background_color;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_dirty_max_excl_y = 0u;
    if (((uint8_t)(self->private_impl.f_call_sequence & 16u)) != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    } else if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_gif__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (self->private_impl.f_frame_config_io_position != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      status = wuffs_gif__decoder__skip_frame(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      if (self->private_impl.f_call_sequence >= 96u) {
        status = wuffs_base__make_status(wuffs_base__note__end_of_data);
        goto ok;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if ((self->private_impl.f_num_decoded_frame_configs_value > 0u) || (self->private_impl.f_call_sequence == 40u)) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      status = wuffs_gif__decoder__decode_up_to_id_part1(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      if (self->private_impl.f_call_sequence >= 96u) {
        status = wuffs_base__make_status(wuffs_base__note__end_of_data);
        goto ok;
      }
    }
    v_background_color = self->private_impl.f_black_color_u32_argb_premul;
    if ( ! self->private_impl.f_gc_has_transparent_index) {
      v_background_color = self->private_impl.f_background_color_u32_argb_premul;
      if (self->private_impl.f_quirks[1u] && (self->private_impl.f_num_decoded_frame_configs_value == 0u)) {
        while (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4);
        }
        v_flags = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
        if (((uint8_t)(v_flags & 128u)) != 0u) {
          v_background_color = self->private_impl.f_black_color_u32_argb_premul;
        }
      }
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          wuffs_base__u32__min(self->private_impl.f_frame_rect_x0, self->private_impl.f_width),
          wuffs_base__u32__min(self->private_impl.f_frame_rect_y0, self->private_impl.f_height),
          wuffs_base__u32__min(self->private_impl.f_frame_rect_x1, self->private_impl.f_width),
          wuffs_base__u32__min(self->private_impl.f_frame_rect_y1, self->private_impl.f_height)),
          ((wuffs_base__flicks)(self->private_impl.f_gc_duration)),
          self->private_impl.f_num_decoded_frame_configs_value,
          self->private_impl.f_frame_config_io_position,
          self->private_impl.f_gc_disposal,
          ! self->private_impl.f_gc_has_transparent_index,
          false,
          v_background_color);
    }
    wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_num_decoded_frame_configs_value, 1u);
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_frame_config.v_background_color = v_background_color;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.skip_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__skip_frame(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_flags = 0;
  uint8_t v_lw = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_skip_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_flags = t_0;
    }
    if (((uint8_t)(v_flags & 128u)) != 0u) {
      self->private_data.s_skip_frame.scratch = (((uint32_t)(3u)) << ((uint8_t)(1u + ((uint8_t)(v_flags & 7u)))));
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      if (self->private_data.s_skip_frame.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_skip_frame.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_skip_frame.scratch;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_1 = *iop_a_src++;
      v_lw = t_1;
    }
    if (v_lw > 8u) {
      status = wuffs_base__make_status(wuffs_gif__error__bad_literal_width);
      goto exit;
    }
    if (a_src) {
      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
    status = wuffs_gif__decoder__skip_blocks(self, a_src);
    if (a_src) {
      iop_a_src = a_src->data.ptr + a_src->meta.ri;
    }
    if (status.repr) {
      goto suspend;
    }
    if (self->private_impl.f_quirks[0u]) {
      self->private_impl.f_delayed_num_decoded_frames = true;
    } else {
      wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_num_decoded_frames_value, 1u);
    }
    wuffs_gif__decoder__reset_gc(self);
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_skip_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_skip_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gif__decoder__decode_frame(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_gif__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_gif__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 4 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func gif.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__do_decode_frame(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_gif__decoder__do_decode_frame_config(self, NULL, a_src);
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (self->private_impl.f_quirks[5u] && ((self->private_impl.f_frame_rect_x0 == self->private_impl.f_frame_rect_x1) || (self->private_impl.f_frame_rect_y0 == self->private_impl.f_frame_rect_y1))) {
      status = wuffs_base__make_status(wuffs_gif__error__bad_frame_size);
      goto exit;
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
    status = wuffs_gif__decoder__decode_id_part1(self, a_dst, a_src, a_blend);
    if (status.repr) {
      goto suspend;
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
    status = wuffs_gif__decoder__decode_id_part2(self, a_dst, a_src, a_workbuf);
    if (status.repr) {
      goto suspend;
    }
    wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_num_decoded_frames_value, 1u);
    wuffs_gif__decoder__reset_gc(self);
    self->private_impl.f_call_sequence = 32u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  return status;
}

// -------- func gif.decoder.reset_gc

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_gif__decoder__reset_gc(
    wuffs_gif__decoder* self) {
  self->private_impl.f_gc_has_transparent_index = false;
  self->private_impl.f_gc_transparent_index = 0u;
  self->private_impl.f_gc_disposal = 0u;
  self->private_impl.f_gc_duration = 0u;
  return wuffs_base__make_empty_struct();
}

// -------- func gif.decoder.decode_up_to_id_part1

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_up_to_id_part1(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_block_type = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_up_to_id_part1;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if ((self->private_impl.f_frame_config_io_position == 0u) || (self->private_impl.f_num_decoded_frame_configs_value > 0u)) {
      self->private_impl.f_frame_config_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
    }
    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_block_type = t_0;
      }
      if (v_block_type == 33u) {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        status = wuffs_gif__decoder__decode_extension(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
      } else if (v_block_type == 44u) {
        if (self->private_impl.f_delayed_num_decoded_frames) {
          self->private_impl.f_delayed_num_decoded_frames = false;
          wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_num_decoded_frames_value, 1u);
        }
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        status = wuffs_gif__decoder__decode_id_part0(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
        break;
      } else {
        if (self->private_impl.f_delayed_num_decoded_frames) {
          self->private_impl.f_delayed_num_decoded_frames = false;
          wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_num_decoded_frames_value, 1u);
        }
        self->private_impl.f_call_sequence = 96u;
        break;
      }
    }

    goto ok;
    ok:
    self->private_impl.p_decode_up_to_id_part1 = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_up_to_id_part1 = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.decode_header

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_header(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_c48 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_header;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint64_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 6)) {
        t_0 = ((uint64_t)(wuffs_base__peek_u48le__no_bounds_check(iop_a_src)));
        iop_a_src += 6;
      } else {
        self->private_data.s_decode_header.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_header.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 40) {
            t_0 = ((uint64_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_c48 = t_0;
    }
    if ((v_c48 != 106889795225927u) && (v_c48 != 106898385160519u)) {
      status = wuffs_base__make_status(wuffs_gif__error__bad_header);
      goto exit;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_header = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_header = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.decode_lsd

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_lsd(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_flags = 0;
  uint8_t v_background_color_index = 0;
  uint32_t v_num_palette_entries = 0;
  uint32_t v_i = 0;
  uint32_t v_j = 0;
  uint32_t v_argb = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_lsd;
  if (coro_susp_point) {
    v_flags = self->private_data.s_decode_lsd.v_flags;
    v_background_color_index = self->private_data.s_decode_lsd.v_background_color_index;
    v_num_palette_entries = self->private_data.s_decode_lsd.v_num_palette_entries;
    v_i = self->private_data.s_decode_lsd.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_0 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_lsd.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_lsd.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 8) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      self->private_impl.f_width = t_0;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_1 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_lsd.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_lsd.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 8) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      self->private_impl.f_height = t_1;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_2 = *iop_a_src++;
      v_flags = t_2;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_3 = *iop_a_src++;
      v_background_color_index = t_3;
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
    if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      goto suspend;
    }
    iop_a_src++;
    v_i = 0u;
    self->private_impl.f_has_global_palette = (((uint8_t)(v_flags & 128u)) != 0u);
    if (self->private_impl.f_has_global_palette) {
      v_num_palette_entries = (((uint32_t)(1u)) << ((uint8_t)(1u + ((uint8_t)(v_flags & 7u)))));
      while (v_i < v_num_palette_entries) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
          uint32_t t_4;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) {
            t_4 = ((uint32_t)(wuffs_base__peek_u24be__no_bounds_check(iop_a_src)));
            iop_a_src += 3;
          } else {
            self->private_data.s_decode_lsd.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_decode_lsd.scratch;
              uint32_t num_bits_4 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_4);
              if (num_bits_4 == 16) {
                t_4 = ((uint32_t)(*scratch >> 40));
                break;
              }
              num_bits_4 += 8u;
              *scratch |= ((uint64_t)(num_bits_4));
            }
          }
          v_argb = t_4;
        }
        v_argb |= 4278190080u;
        self->private_data.f_palettes[0u][((4u * v_i) + 0u)] = ((uint8_t)((v_argb >> 0u)));
        self->private_data.f_palettes[0u][((4u * v_i) + 1u)] = ((uint8_t)((v_argb >> 8u)));
        self->private_data.f_palettes[0u][((4u * v_i) + 2u)] = ((uint8_t)((v_argb >> 16u)));
        self->private_data.f_palettes[0u][((4u * v_i) + 3u)] = ((uint8_t)((v_argb >> 24u)));
        v_i += 1u;
      }
      if (self->private_impl.f_quirks[2u]) {
        if ((v_background_color_index != 0u) && (((uint32_t)(v_background_color_index)) < v_num_palette_entries)) {
          v_j = (4u * ((uint32_t)(v_background_color_index)));
          self->private_impl.f_background_color_u32_argb_premul = ((((uint32_t)(self->private_data.f_palettes[0u][(v_j + 0u)])) << 0u) |
              (((uint32_t)(self->private_data.f_palettes[0u][(v_j + 1u)])) << 8u) |
              (((uint32_t)(self->private_data.f_palettes[0u][(v_j + 2u)])) << 16u) |
              (((uint32_t)(self->private_data.f_palettes[0u][(v_j + 3u)])) << 24u));
        } else {
          self->private_impl.f_background_color_u32_argb_premul = 77u;
        }
      }
    }
    while (v_i < 256u) {
      self->private_data.f_palettes[0u][((4u * v_i) + 0u)] = 0u;
      self->private_data.f_palettes[0u][((4u * v_i) + 1u)] = 0u;
      self->private_data.f_palettes[0u][((4u * v_i) + 2u)] = 0u;
      self->private_data.f_palettes[0u][((4u * v_i) + 3u)] = 255u;
      v_i += 1u;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_lsd = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_lsd = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_lsd.v_flags = v_flags;
  self->private_data.s_decode_lsd.v_background_color_index = v_background_color_index;
  self->private_data.s_decode_lsd.v_num_palette_entries = v_num_palette_entries;
  self->private_data.s_decode_lsd.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.decode_extension

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_extension(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_label = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_extension;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_label = t_0;
    }
    if (v_label == 249u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      status = wuffs_gif__decoder__decode_gc(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      status = wuffs_base__make_status(NULL);
      goto ok;
    } else if (v_label == 255u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      status = wuffs_gif__decoder__decode_ae(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      status = wuffs_base__make_status(NULL);
      goto ok;
    }
    if (a_src) {
      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
    status = wuffs_gif__decoder__skip_blocks(self, a_src);
    if (a_src) {
      iop_a_src = a_src->data.ptr + a_src->meta.ri;
    }
    if (status.repr) {
      goto suspend;
    }

    ok:
    self->private_impl.p_decode_extension = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_extension = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.skip_blocks

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__skip_blocks(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_block_size = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_skip_blocks;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_block_size = t_0;
      }
      if (v_block_size == 0u) {
        status = wuffs_base__make_status(NULL);
        goto ok;
      }
      self->private_data.s_skip_blocks.scratch = ((uint32_t)(v_block_size));
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      if (self->private_data.s_skip_blocks.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_skip_blocks.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_skip_blocks.scratch;
    }

    ok:
    self->private_impl.p_skip_blocks = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_skip_blocks = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.decode_ae

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_ae(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint8_t v_block_size = 0;
  bool v_is_animexts = false;
  bool v_is_netscape = false;
  bool v_is_iccp = false;
  bool v_is_xmp = false;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_ae;
  if (coro_susp_point) {
    v_block_size = self->private_data.s_decode_ae.v_block_size;
    v_is_animexts = self->private_data.s_decode_ae.v_is_animexts;
    v_is_netscape = self->private_data.s_decode_ae.v_is_netscape;
    v_is_iccp = self->private_data.s_decode_ae.v_is_iccp;
    v_is_xmp = self->private_data.s_decode_ae.v_is_xmp;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    do {
      if (self->private_impl.f_metadata_fourcc != 0u) {
        status = wuffs_base__make_status(wuffs_base__note__metadata_reported);
        goto ok;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_block_size = t_0;
      }
      if (v_block_size == 0u) {
        status = wuffs_base__make_status(NULL);
        goto ok;
      }
      if (v_block_size != 11u) {
        self->private_data.s_decode_ae.scratch = ((uint32_t)(v_block_size));
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        if (self->private_data.s_decode_ae.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
          self->private_data.s_decode_ae.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
          iop_a_src = io2_a_src;
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        iop_a_src += self->private_data.s_decode_ae.scratch;
        break;
      }
      v_is_animexts = true;
      v_is_netscape = true;
      v_is_iccp = true;
      v_is_xmp = true;
      v_block_size = 0u;
      while (v_block_size < 11u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
        v_is_animexts = (v_is_animexts && (v_c8 == WUFFS_GIF__ANIMEXTS1DOT0[v_block_size]));
        v_is_netscape = (v_is_netscape && (v_c8 == WUFFS_GIF__NETSCAPE2DOT0[v_block_size]));
        v_is_iccp = (v_is_iccp && (v_c8 == WUFFS_GIF__ICCRGBG1012[v_block_size]));
        v_is_xmp = (v_is_xmp && (v_c8 == WUFFS_GIF__XMPDATAXMP[v_block_size]));
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_block_size += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      }
      if (v_is_animexts || v_is_netscape) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          v_block_size = t_2;
        }
        if (v_block_size != 3u) {
          self->private_data.s_decode_ae.scratch = ((uint32_t)(v_block_size));
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
          if (self->private_data.s_decode_ae.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
            self->private_data.s_decode_ae.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
            iop_a_src = io2_a_src;
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          iop_a_src += self->private_data.s_decode_ae.scratch;
          break;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_3 = *iop_a_src++;
          v_c8 = t_3;
        }
        if (v_c8 != 1u) {
          self->private_data.s_decode_ae.scratch = 2u;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          if (self->private_data.s_decode_ae.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
            self->private_data.s_decode_ae.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
            iop_a_src = io2_a_src;
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          iop_a_src += self->private_data.s_decode_ae.scratch;
          break;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
          uint32_t t_4;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
            t_4 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
            iop_a_src += 2;
          } else {
            self->private_data.s_decode_ae.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_decode_ae.scratch;
              uint32_t num_bits_4 = ((uint32_t)(*scratch >> 56));
              *scratch <<= 8;
              *scratch >>= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4;
              if (num_bits_4 == 8) {
                t_4 = ((uint32_t)(*scratch));
                break;
              }
              num_bits_4 += 8u;
              *scratch |= ((uint64_t)(num_bits_4)) << 56;
            }
          }
          self->private_impl.f_num_animation_loops_value = t_4;
        }
        self->private_impl.f_seen_num_animation_loops_value = true;
        if ((0u < self->private_impl.f_num_animation_loops_value) && (self->private_impl.f_num_animation_loops_value <= 65535u)) {
          self->private_impl.f_num_animation_loops_value += 1u;
        }
      } else if (self->private_impl.f_call_sequence >= 32u) {
      } else if (v_is_iccp && self->private_impl.f_report_metadata_iccp) {
        self->private_impl.f_metadata_fourcc = 1229144912u;
        self->private_impl.f_metadata_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
        self->private_impl.f_call_sequence = 16u;
        status = wuffs_base__make_status(wuffs_base__note__metadata_reported);
        goto ok;
      } else if (v_is_xmp && self->private_impl.f_report_metadata_xmp) {
        self->private_impl.f_metadata_fourcc = 1481461792u;
        self->private_impl.f_metadata_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
        self->private_impl.f_call_sequence = 16u;
        status = wuffs_base__make_status(wuffs_base__note__metadata_reported);
        goto ok;
      }
    } while (0);
    if (a_src) {
      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
    status = wuffs_gif__decoder__skip_blocks(self, a_src);
    if (a_src) {
      iop_a_src = a_src->data.ptr + a_src->meta.ri;
    }
    if (status.repr) {
      goto suspend;
    }

    ok:
    self->private_impl.p_decode_ae = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_ae = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_ae.v_block_size = v_block_size;
  self->private_data.s_decode_ae.v_is_animexts = v_is_animexts;
  self->private_data.s_decode_ae.v_is_netscape = v_is_netscape;
  self->private_data.s_decode_ae.v_is_iccp = v_is_iccp;
  self->private_data.s_decode_ae.v_is_xmp = v_is_xmp;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.decode_gc

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_gc(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint8_t v_flags = 0;
  uint16_t v_gc_duration_centiseconds = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_gc;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_c8 = t_0;
    }
    if (v_c8 != 4u) {
      status = wuffs_base__make_status(wuffs_gif__error__bad_graphic_control);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_1 = *iop_a_src++;
      v_flags = t_1;
    }
    self->private_impl.f_gc_has_transparent_index = (((uint8_t)(v_flags & 1u)) != 0u);
    v_flags = ((uint8_t)(((uint8_t)(v_flags >> 2u)) & 7u));
    if (v_flags == 2u) {
      self->private_impl.f_gc_disposal = 1u;
    } else if ((v_flags == 3u) || (v_flags == 4u)) {
      self->private_impl.f_gc_disposal = 2u;
    } else {
      self->private_impl.f_gc_disposal = 0u;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint16_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_2 = wuffs_base__peek_u16le__no_bounds_check(iop_a_src);
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_gc.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_gc.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
          if (num_bits_2 == 8) {
            t_2 = ((uint16_t)(*scratch));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2)) << 56;
        }
      }
      v_gc_duration_centiseconds = t_2;
    }
    self->private_impl.f_gc_duration = (((uint64_t)(v_gc_duration_centiseconds)) * 7056000u);
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_3 = *iop_a_src++;
      self->private_impl.f_gc_transparent_index = t_3;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_4 = *iop_a_src++;
      v_c8 = t_4;
    }
    if (v_c8 != 0u) {
      status = wuffs_base__make_status(wuffs_gif__error__bad_graphic_control);
      goto exit;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_gc = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_gc = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.decode_id_part0

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_id_part0(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_id_part0;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_0 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_id_part0.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_id_part0.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 8) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      self->private_impl.f_frame_rect_x0 = t_0;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_1 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_id_part0.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_id_part0.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 8) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      self->private_impl.f_frame_rect_y0 = t_1;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      uint32_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_2 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_id_part0.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_id_part0.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
          if (num_bits_2 == 8) {
            t_2 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2)) << 56;
        }
      }
      self->private_impl.f_frame_rect_x1 = t_2;
    }
    self->private_impl.f_frame_rect_x1 += self->private_impl.f_frame_rect_x0;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
      uint32_t t_3;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_3 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_id_part0.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_id_part0.scratch;
          uint32_t num_bits_3 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_3;
          if (num_bits_3 == 8) {
            t_3 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_3 += 8u;
          *scratch |= ((uint64_t)(num_bits_3)) << 56;
        }
      }
      self->private_impl.f_frame_rect_y1 = t_3;
    }
    self->private_impl.f_frame_rect_y1 += self->private_impl.f_frame_rect_y0;
    self->private_impl.f_dst_x = self->private_impl.f_frame_rect_x0;
    self->private_impl.f_dst_y = self->private_impl.f_frame_rect_y0;
    if ((self->private_impl.f_num_decoded_frame_configs_value == 0u) &&  ! self->private_impl.f_quirks[4u]) {
      self->private_impl.f_width = wuffs_base__u32__max(self->private_impl.f_width, self->private_impl.f_frame_rect_x1);
      self->private_impl.f_height = wuffs_base__u32__max(self->private_impl.f_height, self->private_impl.f_frame_rect_y1);
    }

    goto ok;
    ok:
    self->private_impl.p_decode_id_part0 = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_id_part0 = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.decode_id_part1

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_id_part1(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_flags = 0;
  uint8_t v_which_palette = 0;
  uint32_t v_num_palette_entries = 0;
  uint32_t v_i = 0;
  uint32_t v_argb = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint8_t v_lw = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_id_part1;
  if (coro_susp_point) {
    v_which_palette = self->private_data.s_decode_id_part1.v_which_palette;
    v_num_palette_entries = self->private_data.s_decode_id_part1.v_num_palette_entries;
    v_i = self->private_data.s_decode_id_part1.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_flags = t_0;
    }
    if (((uint8_t)(v_flags & 64u)) != 0u) {
      self->private_impl.f_interlace = 4u;
    } else {
      self->private_impl.f_interlace = 0u;
    }
    v_which_palette = 1u;
    if (((uint8_t)(v_flags & 128u)) != 0u) {
      v_num_palette_entries = (((uint32_t)(1u)) << ((uint8_t)(1u + ((uint8_t)(v_flags & 7u)))));
      v_i = 0u;
      while (v_i < v_num_palette_entries) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          uint32_t t_1;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) {
            t_1 = ((uint32_t)(wuffs_base__peek_u24be__no_bounds_check(iop_a_src)));
            iop_a_src += 3;
          } else {
            self->private_data.s_decode_id_part1.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_decode_id_part1.scratch;
              uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
              if (num_bits_1 == 16) {
                t_1 = ((uint32_t)(*scratch >> 40));
                break;
              }
              num_bits_1 += 8u;
              *scratch |= ((uint64_t)(num_bits_1));
            }
          }
          v_argb = t_1;
        }
        v_argb |= 4278190080u;
        self->private_data.f_palettes[1u][((4u * v_i) + 0u)] = ((uint8_t)((v_argb >> 0u)));
        self->private_data.f_palettes[1u][((4u * v_i) + 1u)] = ((uint8_t)((v_argb >> 8u)));
        self->private_data.f_palettes[1u][((4u * v_i) + 2u)] = ((uint8_t)((v_argb >> 16u)));
        self->private_data.f_palettes[1u][((4u * v_i) + 3u)] = ((uint8_t)((v_argb >> 24u)));
        v_i += 1u;
      }
      while (v_i < 256u) {
        self->private_data.f_palettes[1u][((4u * v_i) + 0u)] = 0u;
        self->private_data.f_palettes[1u][((4u * v_i) + 1u)] = 0u;
        self->private_data.f_palettes[1u][((4u * v_i) + 2u)] = 0u;
        self->private_data.f_palettes[1u][((4u * v_i) + 3u)] = 255u;
        v_i += 1u;
      }
    } else if (self->private_impl.f_quirks[6u] &&  ! self->private_impl.f_has_global_palette) {
      status = wuffs_base__make_status(wuffs_gif__error__bad_palette);
      goto exit;
    } else if (self->private_impl.f_gc_has_transparent_index) {
      wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8(self->private_data.f_palettes[1u], 1024), wuffs_base__make_slice_u8(self->private_data.f_palettes[0u], 1024));
    } else {
      v_which_palette = 0u;
    }
    if (self->private_impl.f_gc_has_transparent_index) {
      self->private_data.f_palettes[1u][((4u * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 0u)] = 0u;
      self->private_data.f_palettes[1u][((4u * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 1u)] = 0u;
      self->private_data.f_palettes[1u][((4u * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 2u)] = 0u;
      self->private_data.f_palettes[1u][((4u * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 3u)] = 0u;
    }
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024)),
        wuffs_base__utility__make_pixel_format(2198077448u),
        wuffs_base__make_slice_u8(self->private_data.f_palettes[v_which_palette], 1024),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    if (self->private_impl.f_ignored_but_affects_benchmarks) {
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_2 = *iop_a_src++;
      v_lw = t_2;
    }
    if (v_lw > 8u) {
      status = wuffs_base__make_status(wuffs_gif__error__bad_literal_width);
      goto exit;
    }
    self->private_impl.f_lzw_pending_literal_width_plus_one = ((uint32_t)(((uint8_t)(1u + v_lw))));
    self->private_impl.f_ignored_but_affects_benchmarks = true;

    ok:
    self->private_impl.p_decode_id_part1 = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_id_part1 = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_id_part1.v_which_palette = v_which_palette;
  self->private_data.s_decode_id_part1.v_num_palette_entries = v_num_palette_entries;
  self->private_data.s_decode_id_part1.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.decode_id_part2

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__decode_id_part2(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_block_size = 0;
  bool v_need_block_size = false;
  uint32_t v_n_copied = 0;
  uint64_t v_n_compressed = 0;
  wuffs_base__io_buffer u_r = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_r = &u_r;
  const uint8_t* iop_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io0_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint64_t v_mark = 0;
  wuffs_base__status v_copy_status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_id_part2;
  if (coro_susp_point) {
    v_block_size = self->private_data.s_decode_id_part2.v_block_size;
    v_need_block_size = self->private_data.s_decode_id_part2.v_need_block_size;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    wuffs_gif__decoder__lzw_init(self);
    v_need_block_size = true;
    label__outer__continue:;
    while (true) {
      if (v_need_block_size) {
        v_need_block_size = false;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t t_0 = *iop_a_src++;
          v_block_size = t_0;
        }
      }
      if (v_block_size == 0u) {
        break;
      }
      while (((uint64_t)(io2_a_src - iop_a_src)) == 0u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
      }
      if (self->private_impl.f_compressed_ri == self->private_impl.f_compressed_wi) {
        self->private_impl.f_compressed_ri = 0u;
        self->private_impl.f_compressed_wi = 0u;
      }
      while (self->private_impl.f_compressed_wi <= 3841u) {
        v_n_compressed = wuffs_base__u64__min(v_block_size, ((uint64_t)(io2_a_src - iop_a_src)));
        if (v_n_compressed <= 0u) {
          break;
        }
        v_n_copied = wuffs_private_impl__io_reader__limited_copy_u32_to_slice(
            &iop_a_src, io2_a_src,((uint32_t)(v_n_compressed)), wuffs_base__make_slice_u8_ij(self->private_data.f_compressed, self->private_impl.f_compressed_wi, 4096));
        wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_compressed_wi, ((uint64_t)(v_n_copied)));
        wuffs_private_impl__u64__sat_sub_indirect(&v_block_size, ((uint64_t)(v_n_copied)));
        if (v_block_size > 0u) {
          break;
        }
        if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
          v_need_block_size = true;
          break;
        }
        v_block_size = ((uint64_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src)));
        iop_a_src += 1u;
      }
      while (true) {
        if ((self->private_impl.f_compressed_ri > self->private_impl.f_compressed_wi) || (self->private_impl.f_compressed_wi > 4096u)) {
          status = wuffs_base__make_status(wuffs_gif__error__internal_error_inconsistent_i_o);
          goto exit;
        }
        {
          wuffs_base__io_buffer* o_0_v_r = v_r;
          const uint8_t* o_0_iop_v_r = iop_v_r;
          const uint8_t* o_0_io0_v_r = io0_v_r;
          const uint8_t* o_0_io1_v_r = io1_v_r;
          const uint8_t* o_0_io2_v_r = io2_v_r;
          v_r = wuffs_private_impl__io_reader__set(
              &u_r,
              &iop_v_r,
              &io0_v_r,
              &io1_v_r,
              &io2_v_r,
              wuffs_base__make_slice_u8_ij(self->private_data.f_compressed,
              self->private_impl.f_compressed_ri,
              self->private_impl.f_compressed_wi),
              0u);
          v_mark = ((uint64_t)(iop_v_r - io0_v_r));
          u_r.meta.ri = ((size_t)(iop_v_r - u_r.data.ptr));
          wuffs_gif__decoder__lzw_read_from(self, v_r);
          iop_v_r = u_r.data.ptr + u_r.meta.ri;
          wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_compressed_ri, wuffs_private_impl__io__count_since(v_mark, ((uint64_t)(iop_v_r - io0_v_r))));
          v_r = o_0_v_r;
          iop_v_r = o_0_iop_v_r;
          io0_v_r = o_0_io0_v_r;
          io1_v_r = o_0_io1_v_r;
          io2_v_r = o_0_io2_v_r;
        }
        if (self->private_impl.f_lzw_output_ri < self->private_impl.f_lzw_output_wi) {
          v_copy_status = wuffs_gif__decoder__copy_to_image_buffer(self, a_dst, wuffs_base__make_slice_u8_ij(self->private_data.f_lzw_output,
              self->private_impl.f_lzw_output_ri,
              self->private_impl.f_lzw_output_wi));
          if (wuffs_base__status__is_error(&v_copy_status)) {
            status = v_copy_status;
            goto exit;
          }
          self->private_impl.f_lzw_output_ri = 0u;
          self->private_impl.f_lzw_output_wi = 0u;
        }
        if (self->private_impl.f_lzw_read_from_return_value == 0u) {
          self->private_impl.f_ignored_but_affects_benchmarks = false;
          if (v_need_block_size || (v_block_size > 0u)) {
            self->private_data.s_decode_id_part2.scratch = ((uint32_t)(v_block_size));
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
            if (self->private_data.s_decode_id_part2.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
              self->private_data.s_decode_id_part2.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
              iop_a_src = io2_a_src;
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            iop_a_src += self->private_data.s_decode_id_part2.scratch;
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
            status = wuffs_gif__decoder__skip_blocks(self, a_src);
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
            if (status.repr) {
              goto suspend;
            }
          }
          goto label__outer__break;
        } else if (self->private_impl.f_lzw_read_from_return_value == 1u) {
          continue;
        } else if (self->private_impl.f_lzw_read_from_return_value == 2u) {
          goto label__outer__continue;
        } else if (self->private_impl.f_quirks[3u] && (self->private_impl.f_dst_y >= self->private_impl.f_frame_rect_y1) && (self->private_impl.f_interlace == 0u)) {
          if (v_need_block_size || (v_block_size > 0u)) {
            self->private_data.s_decode_id_part2.scratch = ((uint32_t)(v_block_size));
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
            if (self->private_data.s_decode_id_part2.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
              self->private_data.s_decode_id_part2.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
              iop_a_src = io2_a_src;
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            iop_a_src += self->private_data.s_decode_id_part2.scratch;
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
            status = wuffs_gif__decoder__skip_blocks(self, a_src);
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
            if (status.repr) {
              goto suspend;
            }
          }
          goto label__outer__break;
        } else if (self->private_impl.f_lzw_read_from_return_value == 3u) {
          status = wuffs_base__make_status(wuffs_gif__error__truncated_input);
          goto exit;
        } else if (self->private_impl.f_lzw_read_from_return_value == 4u) {
          status = wuffs_base__make_status(wuffs_gif__error__bad_lzw_code);
          goto exit;
        }
        status = wuffs_base__make_status(wuffs_gif__error__internal_error_inconsistent_i_o);
        goto exit;
      }
    }
    label__outer__break:;
    self->private_impl.f_compressed_ri = 0u;
    self->private_impl.f_compressed_wi = 0u;
    if ((self->private_impl.f_dst_y < self->private_impl.f_frame_rect_y1) && (self->private_impl.f_frame_rect_x0 != self->private_impl.f_frame_rect_x1) && (self->private_impl.f_frame_rect_y0 != self->private_impl.f_frame_rect_y1)) {
      status = wuffs_base__make_status(wuffs_base__error__not_enough_data);
      goto exit;
    }

    ok:
    self->private_impl.p_decode_id_part2 = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_id_part2 = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_id_part2.v_block_size = v_block_size;
  self->private_data.s_decode_id_part2.v_need_block_size = v_need_block_size;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func gif.decoder.copy_to_image_buffer

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gif__decoder__copy_to_image_buffer(
    wuffs_gif__decoder* self,
    wuffs_base__pixel_buffer* a_pb,
    wuffs_base__slice_u8 a_src) {
  wuffs_base__slice_u8 v_dst = {0};
  wuffs_base__slice_u8 v_src = {0};
  uint64_t v_width_in_bytes = 0;
  uint64_t v_n = 0;
  uint64_t v_src_ri = 0;
  wuffs_base__pixel_format v_pixfmt = {0};
  uint32_t v_bytes_per_pixel = 0;
  uint32_t v_bits_per_pixel = 0;
  wuffs_base__table_u8 v_tab = {0};
  uint64_t v_i = 0;
  uint64_t v_j = 0;
  uint32_t v_replicate_y0 = 0;
  uint32_t v_replicate_y1 = 0;
  wuffs_base__slice_u8 v_replicate_dst = {0};
  wuffs_base__slice_u8 v_replicate_src = {0};

  v_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_pb);
  v_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_pixfmt);
  if ((v_bits_per_pixel & 7u) != 0u) {
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  v_bytes_per_pixel = (v_bits_per_pixel >> 3u);
  v_width_in_bytes = ((uint64_t)((self->private_impl.f_width * v_bytes_per_pixel)));
  v_tab = wuffs_base__pixel_buffer__plane(a_pb, 0u);
  while (v_src_ri < ((uint64_t)(a_src.len))) {
    v_src = wuffs_base__slice_u8__subslice_i(a_src, v_src_ri);
    if (self->private_impl.f_dst_y >= self->private_impl.f_frame_rect_y1) {
      if (self->private_impl.f_quirks[3u]) {
        return wuffs_base__make_status(NULL);
      }
      return wuffs_base__make_status(wuffs_base__error__too_much_data);
    }
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
    if (self->private_impl.f_dst_y >= self->private_impl.f_height) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, 0u);
    } else if (v_width_in_bytes < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_width_in_bytes);
    }
    v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_bytes_per_pixel)));
    if (v_i < ((uint64_t)(v_dst.len))) {
      v_j = (((uint64_t)(self->private_impl.f_frame_rect_x1)) * ((uint64_t)(v_bytes_per_pixel)));
      if ((v_i <= v_j) && (v_j <= ((uint64_t)(v_dst.len)))) {
        v_dst = wuffs_base__slice_u8__subslice_ij(v_dst, v_i, v_j);
      } else {
        v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_i);
      }
      v_n = wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024), v_src);
      wuffs_private_impl__u64__sat_add_indirect(&v_src_ri, v_n);
      wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, ((uint32_t)(v_n)));
      self->private_impl.f_dirty_max_excl_y = wuffs_base__u32__max(self->private_impl.f_dirty_max_excl_y, wuffs_base__u32__sat_add(self->private_impl.f_dst_y, 1u));
    }
    if (self->private_impl.f_frame_rect_x1 <= self->private_impl.f_dst_x) {
      self->private_impl.f_dst_x = self->private_impl.f_frame_rect_x0;
      if (self->private_impl.f_interlace == 0u) {
        wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_y, 1u);
        continue;
      }
      if ((self->private_impl.f_num_decoded_frames_value == 0u) &&  ! self->private_impl.f_gc_has_transparent_index && (self->private_impl.f_interlace > 1u)) {
        v_replicate_src = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
        v_replicate_y0 = wuffs_base__u32__sat_add(self->private_impl.f_dst_y, 1u);
        v_replicate_y1 = wuffs_base__u32__sat_add(self->private_impl.f_dst_y, ((uint32_t)(WUFFS_GIF__INTERLACE_COUNT[self->private_impl.f_interlace])));
        v_replicate_y1 = wuffs_base__u32__min(v_replicate_y1, self->private_impl.f_frame_rect_y1);
        while (v_replicate_y0 < v_replicate_y1) {
          v_replicate_dst = wuffs_private_impl__table_u8__row_u32(v_tab, v_replicate_y0);
          wuffs_private_impl__slice_u8__copy_from_slice(v_replicate_dst, v_replicate_src);
          v_replicate_y0 += 1u;
        }
        self->private_impl.f_dirty_max_excl_y = wuffs_base__u32__max(self->private_impl.f_dirty_max_excl_y, v_replicate_y1);
      }
      wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_y, ((uint32_t)(WUFFS_GIF__INTERLACE_DELTA[self->private_impl.f_interlace])));
      while ((self->private_impl.f_interlace > 0u) && (self->private_impl.f_dst_y >= self->private_impl.f_frame_rect_y1)) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        self->private_impl.f_interlace -= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        self->private_impl.f_dst_y = wuffs_base__u32__sat_add(self->private_impl.f_frame_rect_y0, WUFFS_GIF__INTERLACE_START[self->private_impl.f_interlace]);
      }
      continue;
    }
    if (((uint64_t)(a_src.len)) == v_src_ri) {
      break;
    } else if (((uint64_t)(a_src.len)) < v_src_ri) {
      return wuffs_base__make_status(wuffs_gif__error__internal_error_inconsistent_i_o);
    }
    v_n = ((uint64_t)((self->private_impl.f_frame_rect_x1 - self->private_impl.f_dst_x)));
    v_n = wuffs_base__u64__min(v_n, (((uint64_t)(a_src.len)) - v_src_ri));
    wuffs_private_impl__u64__sat_add_indirect(&v_src_ri, v_n);
    wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, ((uint32_t)(v_n)));
    if (self->private_impl.f_frame_rect_x1 <= self->private_impl.f_dst_x) {
      self->private_impl.f_dst_x = self->private_impl.f_frame_rect_x0;
      wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_y, ((uint32_t)(WUFFS_GIF__INTERLACE_DELTA[self->private_impl.f_interlace])));
      while ((self->private_impl.f_interlace > 0u) && (self->private_impl.f_dst_y >= self->private_impl.f_frame_rect_y1)) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        self->private_impl.f_interlace -= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        self->private_impl.f_dst_y = wuffs_base__u32__sat_add(self->private_impl.f_frame_rect_y0, WUFFS_GIF__INTERLACE_START[self->private_impl.f_interlace]);
      }
      continue;
    }
    if (v_src_ri != ((uint64_t)(a_src.len))) {
      return wuffs_base__make_status(wuffs_gif__error__internal_error_inconsistent_i_o);
    }
    break;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func gif.decoder.lzw_init

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_gif__decoder__lzw_init(
    wuffs_gif__decoder* self) {
  uint32_t v_i = 0;

  self->private_impl.f_lzw_literal_width = 8u;
  if (self->private_impl.f_lzw_pending_literal_width_plus_one > 0u) {
    self->private_impl.f_lzw_literal_width = (self->private_impl.f_lzw_pending_literal_width_plus_one - 1u);
  }
  self->private_impl.f_lzw_clear_code = (((uint32_t)(1u)) << self->private_impl.f_lzw_literal_width);
  self->private_impl.f_lzw_end_code = (self->private_impl.f_lzw_clear_code + 1u);
  self->private_impl.f_lzw_save_code = self->private_impl.f_lzw_end_code;
  self->private_impl.f_lzw_prev_code = self->private_impl.f_lzw_end_code;
  self->private_impl.f_lzw_width = (self->private_impl.f_lzw_literal_width + 1u);
  self->private_impl.f_lzw_bits = 0u;
  self->private_impl.f_lzw_n_bits = 0u;
  self->private_impl.f_lzw_output_ri = 0u;
  self->private_impl.f_lzw_output_wi = 0u;
  v_i = 0u;
  while (v_i < self->private_impl.f_lzw_clear_code) {
    self->private_data.f_lzw_lm1s[v_i] = 0u;
    self->private_data.f_lzw_suffixes[v_i][0u] = ((uint8_t)(v_i));
    v_i += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func gif.decoder.lzw_read_from

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_gif__decoder__lzw_read_from(
    wuffs_gif__decoder* self,
    wuffs_base__io_buffer* a_src) {
  uint32_t v_clear_code = 0;
  uint32_t v_end_code = 0;
  uint32_t v_save_code = 0;
  uint32_t v_prev_code = 0;
  uint32_t v_width = 0;
  uint32_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint32_t v_output_wi = 0;
  uint32_t v_code = 0;
  uint32_t v_c = 0;
  uint32_t v_o = 0;
  uint32_t v_steps = 0;
  uint8_t v_first_byte = 0;
  uint16_t v_lm1_b = 0;
  uint16_t v_lm1_a = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_clear_code = self->private_impl.f_lzw_clear_code;
  v_end_code = self->private_impl.f_lzw_end_code;
  v_save_code = self->private_impl.f_lzw_save_code;
  v_prev_code = self->private_impl.f_lzw_prev_code;
  v_width = self->private_impl.f_lzw_width;
  v_bits = self->private_impl.f_lzw_bits;
  v_n_bits = self->private_impl.f_lzw_n_bits;
  v_output_wi = self->private_impl.f_lzw_output_wi;
  while (true) {
    if (v_n_bits < v_width) {
      if (((uint64_t)(io2_a_src - iop_a_src)) >= 4u) {
        v_bits |= ((uint32_t)(wuffs_base__peek_u32le__no_bounds_check(iop_a_src) << v_n_bits));
        iop_a_src += ((31u - v_n_bits) >> 3u);
        v_n_bits |= 24u;
      } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
        if (a_src && a_src->meta.closed) {
          self->private_impl.f_lzw_read_from_return_value = 3u;
        } else {
          self->private_impl.f_lzw_read_from_return_value = 2u;
        }
        break;
      } else {
        v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
        iop_a_src += 1u;
        v_n_bits += 8u;
        if (v_n_bits >= v_width) {
        } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
          if (a_src && a_src->meta.closed) {
            self->private_impl.f_lzw_read_from_return_value = 3u;
          } else {
            self->private_impl.f_lzw_read_from_return_value = 2u;
          }
          break;
        } else {
          v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
          iop_a_src += 1u;
          v_n_bits += 8u;
          if (v_n_bits < v_width) {
            self->private_impl.f_lzw_read_from_return_value = 5u;
            break;
          }
        }
      }
    }
    v_code = ((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32(v_width));
    v_bits >>= v_width;
    v_n_bits -= v_width;
    if (v_code < v_clear_code) {
      self->private_data.f_lzw_output[v_output_wi] = ((uint8_t)(v_code));
      v_output_wi = ((v_output_wi + 1u) & 8191u);
      if (v_save_code <= 4095u) {
        v_lm1_a = ((uint16_t)(((uint16_t)(self->private_data.f_lzw_lm1s[v_prev_code] + 1u)) & 4095u));
        self->private_data.f_lzw_lm1s[v_save_code] = v_lm1_a;
        if (((uint16_t)(v_lm1_a % 8u)) != 0u) {
          self->private_impl.f_lzw_prefixes[v_save_code] = self->private_impl.f_lzw_prefixes[v_prev_code];
          memcpy(self->private_data.f_lzw_suffixes[v_save_code],self->private_data.f_lzw_suffixes[v_prev_code], sizeof(self->private_data.f_lzw_suffixes[v_save_code]));
          self->private_data.f_lzw_suffixes[v_save_code][((uint16_t)(v_lm1_a % 8u))] = ((uint8_t)(v_code));
        } else {
          self->private_impl.f_lzw_prefixes[v_save_code] = ((uint16_t)(v_prev_code));
          self->private_data.f_lzw_suffixes[v_save_code][0u] = ((uint8_t)(v_code));
        }
        v_save_code += 1u;
        if (v_width < 12u) {
          v_width += (1u & (v_save_code >> v_width));
        }
        v_prev_code = v_code;
      }
    } else if (v_code <= v_end_code) {
      if (v_code == v_end_code) {
        self->private_impl.f_lzw_read_from_return_value = 0u;
        break;
      }
      v_save_code = v_end_code;
      v_prev_code = v_end_code;
      v_width = (self->private_impl.f_lzw_literal_width + 1u);
    } else if (v_code <= v_save_code) {
      v_c = v_code;
      if (v_code == v_save_code) {
        v_c = v_prev_code;
      }
      v_o = ((v_output_wi + (((uint32_t)(self->private_data.f_lzw_lm1s[v_c])) & 4294967288u)) & 8191u);
      v_output_wi = ((v_output_wi + 1u + ((uint32_t)(self->private_data.f_lzw_lm1s[v_c]))) & 8191u);
      v_steps = (((uint32_t)(self->private_data.f_lzw_lm1s[v_c])) >> 3u);
      while (true) {
        memcpy((self->private_data.f_lzw_output)+(v_o), (self->private_data.f_lzw_suffixes[v_c]), 8u);
        if (v_steps <= 0u) {
          break;
        }
        v_steps -= 1u;
        v_o = (((uint32_t)(v_o - 8u)) & 8191u);
        v_c = ((uint32_t)(self->private_impl.f_lzw_prefixes[v_c]));
      }
      v_first_byte = self->private_data.f_lzw_suffixes[v_c][0u];
      if (v_code == v_save_code) {
        self->private_data.f_lzw_output[v_output_wi] = v_first_byte;
        v_output_wi = ((v_output_wi + 1u) & 8191u);
      }
      if (v_save_code <= 4095u) {
        v_lm1_b = ((uint16_t)(((uint16_t)(self->private_data.f_lzw_lm1s[v_prev_code] + 1u)) & 4095u));
        self->private_data.f_lzw_lm1s[v_save_code] = v_lm1_b;
        if (((uint16_t)(v_lm1_b % 8u)) != 0u) {
          self->private_impl.f_lzw_prefixes[v_save_code] = self->private_impl.f_lzw_prefixes[v_prev_code];
          memcpy(self->private_data.f_lzw_suffixes[v_save_code],self->private_data.f_lzw_suffixes[v_prev_code], sizeof(self->private_data.f_lzw_suffixes[v_save_code]));
          self->private_data.f_lzw_suffixes[v_save_code][((uint16_t)(v_lm1_b % 8u))] = v_first_byte;
        } else {
          self->private_impl.f_lzw_prefixes[v_save_code] = ((uint16_t)(v_prev_code));
          self->private_data.f_lzw_suffixes[v_save_code][0u] = ((uint8_t)(v_first_byte));
        }
        v_save_code += 1u;
        if (v_width < 12u) {
          v_width += (1u & (v_save_code >> v_width));
        }
        v_prev_code = v_code;
      }
    } else {
      self->private_impl.f_lzw_read_from_return_value = 4u;
      break;
    }
    if (v_output_wi > 4095u) {
      self->private_impl.f_lzw_read_from_return_value = 1u;
      break;
    }
  }
  if (self->private_impl.f_lzw_read_from_return_value != 2u) {
    while (v_n_bits >= 8u) {
      v_n_bits -= 8u;
      if (iop_a_src > io1_a_src) {
        iop_a_src--;
      } else {
        self->private_impl.f_lzw_read_from_return_value = 5u;
        break;
      }
    }
  }
  self->private_impl.f_lzw_save_code = v_save_code;
  self->private_impl.f_lzw_prev_code = v_prev_code;
  self->private_impl.f_lzw_width = v_width;
  self->private_impl.f_lzw_bits = v_bits;
  self->private_impl.f_lzw_n_bits = v_n_bits;
  self->private_impl.f_lzw_output_wi = v_output_wi;
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return wuffs_base__make_empty_struct();
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GIF)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GZIP)

// ---------------- Status Codes Implementations

const char wuffs_gzip__error__bad_checksum[] = "#gzip: bad checksum";
const char wuffs_gzip__error__bad_compression_method[] = "#gzip: bad compression method";
const char wuffs_gzip__error__bad_encoding_flags[] = "#gzip: bad encoding flags";
const char wuffs_gzip__error__bad_header[] = "#gzip: bad header";
const char wuffs_gzip__error__truncated_input[] = "#gzip: truncated input";

// ---------------- Private Consts

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gzip__decoder__do_transform_io(
    wuffs_gzip__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

// ---------------- VTables

const wuffs_base__io_transformer__func_ptrs
wuffs_gzip__decoder__func_ptrs_for__wuffs_base__io_transformer = {
  (wuffs_base__optional_u63(*)(const void*))(&wuffs_gzip__decoder__dst_history_retain_length),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_gzip__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_gzip__decoder__set_quirk),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_gzip__decoder__transform_io),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_gzip__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_gzip__decoder__initialize(
    wuffs_gzip__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  {
    wuffs_base__status z = wuffs_crc32__ieee_hasher__initialize(
        &self->private_data.f_checksum, sizeof(self->private_data.f_checksum), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  {
    wuffs_base__status z = wuffs_deflate__decoder__initialize(
        &self->private_data.f_flate, sizeof(self->private_data.f_flate), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__io_transformer.vtable_name =
      wuffs_base__io_transformer__vtable_name;
  self->private_impl.vtable_for__wuffs_base__io_transformer.function_pointers =
      (const void*)(&wuffs_gzip__decoder__func_ptrs_for__wuffs_base__io_transformer);
  return wuffs_base__make_status(NULL);
}

wuffs_gzip__decoder*
wuffs_gzip__decoder__alloc(void) {
  wuffs_gzip__decoder* x =
      (wuffs_gzip__decoder*)(calloc(1, sizeof(wuffs_gzip__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_gzip__decoder__initialize(
      x, sizeof(wuffs_gzip__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_gzip__decoder(void) {
  return sizeof(wuffs_gzip__decoder);
}

// ---------------- Function Implementations

// -------- func gzip.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_gzip__decoder__get_quirk(
    const wuffs_gzip__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if ((a_key == 1u) && self->private_impl.f_ignore_checksum) {
    return 1u;
  }
  return 0u;
}

// -------- func gzip.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gzip__decoder__set_quirk(
    wuffs_gzip__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (a_key == 1u) {
    self->private_impl.f_ignore_checksum = (a_value > 0u);
    return wuffs_base__make_status(NULL);
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func gzip.decoder.dst_history_retain_length

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_gzip__decoder__dst_history_retain_length(
    const wuffs_gzip__decoder* self) {
  if (!self) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }

  return wuffs_base__utility__make_optional_u63(true, 0u);
}

// -------- func gzip.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_gzip__decoder__workbuf_len(
    const wuffs_gzip__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(1u, 1u);
}

// -------- func gzip.decoder.transform_io

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_gzip__decoder__transform_io(
    wuffs_gzip__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_gzip__decoder__do_transform_io(self, a_dst, a_src, a_workbuf);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_gzip__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func gzip.decoder.do_transform_io

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_gzip__decoder__do_transform_io(
    wuffs_gzip__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint8_t v_flags = 0;
  uint16_t v_xlen = 0;
  uint64_t v_mark = 0;
  uint32_t v_checksum_have = 0;
  uint32_t v_decoded_length_have = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint32_t v_checksum_want = 0;
  uint32_t v_decoded_length_want = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_transform_io;
  if (coro_susp_point) {
    v_flags = self->private_data.s_do_transform_io.v_flags;
    v_checksum_have = self->private_data.s_do_transform_io.v_checksum_have;
    v_decoded_length_have = self->private_data.s_do_transform_io.v_decoded_length_have;
    v_checksum_want = self->private_data.s_do_transform_io.v_checksum_want;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_c8 = t_0;
    }
    if (v_c8 != 31u) {
      status = wuffs_base__make_status(wuffs_gzip__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_1 = *iop_a_src++;
      v_c8 = t_1;
    }
    if (v_c8 != 139u) {
      status = wuffs_base__make_status(wuffs_gzip__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_2 = *iop_a_src++;
      v_c8 = t_2;
    }
    if (v_c8 != 8u) {
      status = wuffs_base__make_status(wuffs_gzip__error__bad_compression_method);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_3 = *iop_a_src++;
      v_flags = t_3;
    }
    self->private_data.s_do_transform_io.scratch = 6u;
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
    if (self->private_data.s_do_transform_io.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
      self->private_data.s_do_transform_io.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
      iop_a_src = io2_a_src;
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      goto suspend;
    }
    iop_a_src += self->private_data.s_do_transform_io.scratch;
    if (((uint8_t)(v_flags & 4u)) != 0u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        uint16_t t_4;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_4 = wuffs_base__peek_u16le__no_bounds_check(iop_a_src);
          iop_a_src += 2;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_4 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4;
            if (num_bits_4 == 8) {
              t_4 = ((uint16_t)(*scratch));
              break;
            }
            num_bits_4 += 8u;
            *scratch |= ((uint64_t)(num_bits_4)) << 56;
          }
        }
        v_xlen = t_4;
      }
      self->private_data.s_do_transform_io.scratch = ((uint32_t)(v_xlen));
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
      if (self->private_data.s_do_transform_io.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_do_transform_io.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_do_transform_io.scratch;
    }
    if (((uint8_t)(v_flags & 8u)) != 0u) {
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_5 = *iop_a_src++;
          v_c8 = t_5;
        }
        if (v_c8 == 0u) {
          break;
        }
      }
    }
    if (((uint8_t)(v_flags & 16u)) != 0u) {
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_6 = *iop_a_src++;
          v_c8 = t_6;
        }
        if (v_c8 == 0u) {
          break;
        }
      }
    }
    if (((uint8_t)(v_flags & 2u)) != 0u) {
      self->private_data.s_do_transform_io.scratch = 2u;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
      if (self->private_data.s_do_transform_io.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_do_transform_io.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_do_transform_io.scratch;
    }
    if (((uint8_t)(v_flags & 224u)) != 0u) {
      status = wuffs_base__make_status(wuffs_gzip__error__bad_encoding_flags);
      goto exit;
    }
    while (true) {
      v_mark = ((uint64_t)(iop_a_dst - io0_a_dst));
      {
        if (a_dst) {
          a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
        }
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        wuffs_base__status t_7 = wuffs_deflate__decoder__transform_io(&self->private_data.f_flate, a_dst, a_src, a_workbuf);
        v_status = t_7;
        if (a_dst) {
          iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
        }
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
      }
      if ( ! self->private_impl.f_ignore_checksum) {
        v_checksum_have = wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_checksum, wuffs_private_impl__io__since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst));
        v_decoded_length_have += ((uint32_t)(wuffs_private_impl__io__count_since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)))));
      }
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(12);
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13);
      uint32_t t_8;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_8 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_transform_io.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
          uint32_t num_bits_8 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_8;
          if (num_bits_8 == 24) {
            t_8 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_8 += 8u;
          *scratch |= ((uint64_t)(num_bits_8)) << 56;
        }
      }
      v_checksum_want = t_8;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15);
      uint32_t t_9;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_9 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_transform_io.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
          uint32_t num_bits_9 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_9;
          if (num_bits_9 == 24) {
            t_9 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_9 += 8u;
          *scratch |= ((uint64_t)(num_bits_9)) << 56;
        }
      }
      v_decoded_length_want = t_9;
    }
    if ( ! self->private_impl.f_ignore_checksum && ((v_checksum_have != v_checksum_want) || (v_decoded_length_have != v_decoded_length_want))) {
      status = wuffs_base__make_status(wuffs_gzip__error__bad_checksum);
      goto exit;
    }

    ok:
    self->private_impl.p_do_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_transform_io.v_flags = v_flags;
  self->private_data.s_do_transform_io.v_checksum_have = v_checksum_have;
  self->private_data.s_do_transform_io.v_decoded_length_have = v_decoded_length_have;
  self->private_data.s_do_transform_io.v_checksum_want = v_checksum_want;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GZIP)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JPEG)

// ---------------- Status Codes Implementations

const char wuffs_jpeg__error__bad_dht_marker[] = "#jpeg: bad DHT marker";
const char wuffs_jpeg__error__bad_dqt_marker[] = "#jpeg: bad DQT marker";
const char wuffs_jpeg__error__bad_dri_marker[] = "#jpeg: bad DRI marker";
const char wuffs_jpeg__error__bad_sof_marker[] = "#jpeg: bad SOF marker";
const char wuffs_jpeg__error__bad_sos_marker[] = "#jpeg: bad SOS marker";
const char wuffs_jpeg__error__bad_header[] = "#jpeg: bad header";
const char wuffs_jpeg__error__bad_marker[] = "#jpeg: bad marker";
const char wuffs_jpeg__error__bad_scan_count[] = "#jpeg: bad scan count";
const char wuffs_jpeg__error__missing_huffman_table[] = "#jpeg: missing Huffman table";
const char wuffs_jpeg__error__missing_quantization_table[] = "#jpeg: missing Quantization table";
const char wuffs_jpeg__error__rejected_progressive_jpeg[] = "#jpeg: rejected progressive JPEG";
const char wuffs_jpeg__error__short_sos_bitstream[] = "#jpeg: short SOS bitstream";
const char wuffs_jpeg__error__truncated_input[] = "#jpeg: truncated input";
const char wuffs_jpeg__error__unsupported_arithmetic_coding[] = "#jpeg: unsupported arithmetic coding";
const char wuffs_jpeg__error__unsupported_color_model[] = "#jpeg: unsupported color model";
const char wuffs_jpeg__error__unsupported_fractional_sampling[] = "#jpeg: unsupported fractional sampling";
const char wuffs_jpeg__error__unsupported_hierarchical_coding[] = "#jpeg: unsupported hierarchical coding";
const char wuffs_jpeg__error__unsupported_implicit_height[] = "#jpeg: unsupported implicit height";
const char wuffs_jpeg__error__unsupported_lossless_coding[] = "#jpeg: unsupported lossless coding";
const char wuffs_jpeg__error__unsupported_marker[] = "#jpeg: unsupported marker";
const char wuffs_jpeg__error__unsupported_precision_12_bits[] = "#jpeg: unsupported precision (12 bits)";
const char wuffs_jpeg__error__unsupported_precision_16_bits[] = "#jpeg: unsupported precision (16 bits)";
const char wuffs_jpeg__error__unsupported_precision[] = "#jpeg: unsupported precision";
const char wuffs_jpeg__error__unsupported_scan_count[] = "#jpeg: unsupported scan count";
const char wuffs_jpeg__error__internal_error_inconsistent_decoder_state[] = "#jpeg: internal error: inconsistent decoder state";

// ---------------- Private Consts

static const uint8_t
WUFFS_JPEG__UNZIG[80] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 1u, 8u, 16u, 9u, 2u, 3u,
  10u, 17u, 24u, 32u, 25u, 18u, 11u, 4u,
  5u, 12u, 19u, 26u, 33u, 40u, 48u, 41u,
  34u, 27u, 20u, 13u, 6u, 7u, 14u, 21u,
  28u, 35u, 42u, 49u, 56u, 57u, 50u, 43u,
  36u, 29u, 22u, 15u, 23u, 30u, 37u, 44u,
  51u, 58u, 59u, 52u, 45u, 38u, 31u, 39u,
  46u, 53u, 60u, 61u, 54u, 47u, 55u, 62u,
  63u, 63u, 63u, 63u, 63u, 63u, 63u, 63u,
  63u, 63u, 63u, 63u, 63u, 63u, 63u, 63u,
};

static const uint8_t
WUFFS_JPEG__BIAS_AND_CLAMP[1024] WUFFS_BASE__POTENTIALLY_UNUSED = {
  128u, 129u, 130u, 131u, 132u, 133u, 134u, 135u,
  136u, 137u, 138u, 139u, 140u, 141u, 142u, 143u,
  144u, 145u, 146u, 147u, 148u, 149u, 150u, 151u,
  152u, 153u, 154u, 155u, 156u, 157u, 158u, 159u,
  160u, 161u, 162u, 163u, 164u, 165u, 166u, 167u,
  168u, 169u, 170u, 171u, 172u, 173u, 174u, 175u,
  176u, 177u, 178u, 179u, 180u, 181u, 182u, 183u,
  184u, 185u, 186u, 187u, 188u, 189u, 190u, 191u,
  192u, 193u, 194u, 195u, 196u, 197u, 198u, 199u,
  200u, 201u, 202u, 203u, 204u, 205u, 206u, 207u,
  208u, 209u, 210u, 211u, 212u, 213u, 214u, 215u,
  216u, 217u, 218u, 219u, 220u, 221u, 222u, 223u,
  224u, 225u, 226u, 227u, 228u, 229u, 230u, 231u,
  232u, 233u, 234u, 235u, 236u, 237u, 238u, 239u,
  240u, 241u, 242u, 243u, 244u, 245u, 246u, 247u,
  248u, 249u, 250u, 251u, 252u, 253u, 254u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  255u, 255u, 255u, 255u, 255u, 255u, 255u, 255u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 1u, 2u, 3u, 4u, 5u, 6u, 7u,
  8u, 9u, 10u, 11u, 12u, 13u, 14u, 15u,
  16u, 17u, 18u, 19u, 20u, 21u, 22u, 23u,
  24u, 25u, 26u, 27u, 28u, 29u, 30u, 31u,
  32u, 33u, 34u, 35u, 36u, 37u, 38u, 39u,
  40u, 41u, 42u, 43u, 44u, 45u, 46u, 47u,
  48u, 49u, 50u, 51u, 52u, 53u, 54u, 55u,
  56u, 57u, 58u, 59u, 60u, 61u, 62u, 63u,
  64u, 65u, 66u, 67u, 68u, 69u, 70u, 71u,
  72u, 73u, 74u, 75u, 76u, 77u, 78u, 79u,
  80u, 81u, 82u, 83u, 84u, 85u, 86u, 87u,
  88u, 89u, 90u, 91u, 92u, 93u, 94u, 95u,
  96u, 97u, 98u, 99u, 100u, 101u, 102u, 103u,
  104u, 105u, 106u, 107u, 108u, 109u, 110u, 111u,
  112u, 113u, 114u, 115u, 116u, 117u, 118u, 119u,
  120u, 121u, 122u, 123u, 124u, 125u, 126u, 127u,
};

static const uint16_t
WUFFS_JPEG__EXTEND[16] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 65535u, 65533u, 65529u, 65521u, 65505u, 65473u, 65409u,
  65281u, 65025u, 64513u, 63489u, 61441u, 57345u, 49153u, 32769u,
};

static const uint8_t
WUFFS_JPEG__DEFAULT_HUFF_TABLE_DC_LUMA[29] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 1u, 5u, 1u, 1u, 1u, 1u,
  1u, 1u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 1u, 2u, 3u, 4u, 5u, 6u,
  7u, 8u, 9u, 10u, 11u,
};

static const uint8_t
WUFFS_JPEG__DEFAULT_HUFF_TABLE_DC_CHROMA[29] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1u, 0u, 3u, 1u, 1u, 1u, 1u, 1u,
  1u, 1u, 1u, 1u, 0u, 0u, 0u, 0u,
  0u, 0u, 1u, 2u, 3u, 4u, 5u, 6u,
  7u, 8u, 9u, 10u, 11u,
};

static const uint8_t
WUFFS_JPEG__DEFAULT_HUFF_TABLE_AC_LUMA[179] WUFFS_BASE__POTENTIALLY_UNUSED = {
  16u, 0u, 2u, 1u, 3u, 3u, 2u, 4u,
  3u, 5u, 5u, 4u, 4u, 0u, 0u, 1u,
  125u, 1u, 2u, 3u, 0u, 4u, 17u, 5u,
  18u, 33u, 49u, 65u, 6u, 19u, 81u, 97u,
  7u, 34u, 113u, 20u, 50u, 129u, 145u, 161u,
  8u, 35u, 66u, 177u, 193u, 21u, 82u, 209u,
  240u, 36u, 51u, 98u, 114u, 130u, 9u, 10u,
  22u, 23u, 24u, 25u, 26u, 37u, 38u, 39u,
  40u, 41u, 42u, 52u, 53u, 54u, 55u, 56u,
  57u, 58u, 67u, 68u, 69u, 70u, 71u, 72u,
  73u, 74u, 83u, 84u, 85u, 86u, 87u, 88u,
  89u, 90u, 99u, 100u, 101u, 102u, 103u, 104u,
  105u, 106u, 115u, 116u, 117u, 118u, 119u, 120u,
  121u, 122u, 131u, 132u, 133u, 134u, 135u, 136u,
  137u, 138u, 146u, 147u, 148u, 149u, 150u, 151u,
  152u, 153u, 154u, 162u, 163u, 164u, 165u, 166u,
  167u, 168u, 169u, 170u, 178u, 179u, 180u, 181u,
  182u, 183u, 184u, 185u, 186u, 194u, 195u, 196u,
  197u, 198u, 199u, 200u, 201u, 202u, 210u, 211u,
  212u, 213u, 214u, 215u, 216u, 217u, 218u, 225u,
  226u, 227u, 228u, 229u, 230u, 231u, 232u, 233u,
  234u, 241u, 242u, 243u, 244u, 245u, 246u, 247u,
  248u, 249u, 250u,
};

static const uint8_t
WUFFS_JPEG__DEFAULT_HUFF_TABLE_AC_CHROMA[179] WUFFS_BASE__POTENTIALLY_UNUSED = {
  17u, 0u, 2u, 1u, 2u, 4u, 4u, 3u,
  4u, 7u, 5u, 4u, 4u, 0u, 1u, 2u,
  119u, 0u, 1u, 2u, 3u, 17u, 4u, 5u,
  33u, 49u, 6u, 18u, 65u, 81u, 7u, 97u,
  113u, 19u, 34u, 50u, 129u, 8u, 20u, 66u,
  145u, 161u, 177u, 193u, 9u, 35u, 51u, 82u,
  240u, 21u, 98u, 114u, 209u, 10u, 22u, 36u,
  52u, 225u, 37u, 241u, 23u, 24u, 25u, 26u,
  38u, 39u, 40u, 41u, 42u, 53u, 54u, 55u,
  56u, 57u, 58u, 67u, 68u, 69u, 70u, 71u,
  72u, 73u, 74u, 83u, 84u, 85u, 86u, 87u,
  88u, 89u, 90u, 99u, 100u, 101u, 102u, 103u,
  104u, 105u, 106u, 115u, 116u, 117u, 118u, 119u,
  120u, 121u, 122u, 130u, 131u, 132u, 133u, 134u,
  135u, 136u, 137u, 138u, 146u, 147u, 148u, 149u,
  150u, 151u, 152u, 153u, 154u, 162u, 163u, 164u,
  165u, 166u, 167u, 168u, 169u, 170u, 178u, 179u,
  180u, 181u, 182u, 183u, 184u, 185u, 186u, 194u,
  195u, 196u, 197u, 198u, 199u, 200u, 201u, 202u,
  210u, 211u, 212u, 213u, 214u, 215u, 216u, 217u,
  218u, 226u, 227u, 228u, 229u, 230u, 231u, 232u,
  233u, 234u, 242u, 243u, 244u, 245u, 246u, 247u,
  248u, 249u, 250u,
};

#define WUFFS_JPEG__QUIRKS_BASE 1162824704u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__decode_idct(
    wuffs_jpeg__decoder* self,
    wuffs_base__slice_u8 a_dst_buffer,
    uint64_t a_dst_stride,
    uint32_t a_q);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__decode_idct__choosy_default(
    wuffs_jpeg__decoder* self,
    wuffs_base__slice_u8 a_dst_buffer,
    uint64_t a_dst_stride,
    uint32_t a_q);

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__decode_idct_x86_avx2(
    wuffs_jpeg__decoder* self,
    wuffs_base__slice_u8 a_dst_buffer,
    uint64_t a_dst_stride,
    uint32_t a_q);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__do_decode_image_config(
    wuffs_jpeg__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_dqt(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_dri(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_appn(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint8_t a_marker);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_sof(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__quantize_dimension(
    const wuffs_jpeg__decoder* self,
    uint32_t a_width,
    uint8_t a_h,
    uint8_t a_max_incl_h);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__do_decode_frame_config(
    wuffs_jpeg__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__do_decode_frame(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_dht(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static bool
wuffs_jpeg__decoder__calculate_huff_tables(
    wuffs_jpeg__decoder* self,
    uint8_t a_tc4_th,
    uint32_t a_total_count);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_sos(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__prepare_scan(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__use_default_huffman_table(
    wuffs_jpeg__decoder* self,
    uint8_t a_tc4_th);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__calculate_single_component_scan_fields(
    wuffs_jpeg__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static bool
wuffs_jpeg__decoder__calculate_multiple_component_scan_fields(
    wuffs_jpeg__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__fill_bitstream(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__load_mcu_blocks_for_single_component(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_csel);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__load_mcu_blocks_for_single_component__choosy_default(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_csel);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__load_mcu_blocks(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__save_mcu_blocks(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__skip_past_the_next_restart_marker(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__apply_progressive_idct(
    wuffs_jpeg__decoder* self,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__swizzle_gray(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_x0,
    uint32_t a_x1,
    uint32_t a_y0,
    uint32_t a_y1,
    uint64_t a_stride);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__swizzle_colorful(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_x0,
    uint32_t a_x1,
    uint32_t a_y0,
    uint32_t a_y1);

WUFFS_BASE__GENERATED_C_CODE
static bool
wuffs_jpeg__decoder__top_left_quants_has_zero(
    const wuffs_jpeg__decoder* self,
    uint32_t a_q);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__load_mcu_blocks_for_single_component_smooth(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_csel);

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my);

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu__choosy_default(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my);

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu_progressive_ac_high_bits(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my);

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu_progressive_ac_low_bit(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my);

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu_progressive_dc_high_bits(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my);

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu_progressive_dc_low_bit(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_jpeg__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_jpeg__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_jpeg__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_jpeg__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_jpeg__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_jpeg__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_jpeg__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_jpeg__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_jpeg__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_jpeg__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_jpeg__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_jpeg__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_jpeg__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_jpeg__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_jpeg__decoder__initialize(
    wuffs_jpeg__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.choosy_decode_idct = &wuffs_jpeg__decoder__decode_idct__choosy_default;
  self->private_impl.choosy_load_mcu_blocks_for_single_component = &wuffs_jpeg__decoder__load_mcu_blocks_for_single_component__choosy_default;
  self->private_impl.choosy_decode_mcu = &wuffs_jpeg__decoder__decode_mcu__choosy_default;

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_jpeg__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_jpeg__decoder*
wuffs_jpeg__decoder__alloc(void) {
  wuffs_jpeg__decoder* x =
      (wuffs_jpeg__decoder*)(calloc(1, sizeof(wuffs_jpeg__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_jpeg__decoder__initialize(
      x, sizeof(wuffs_jpeg__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_jpeg__decoder(void) {
  return sizeof(wuffs_jpeg__decoder);
}

// ---------------- Function Implementations

// -------- func jpeg.decoder.decode_idct

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__decode_idct(
    wuffs_jpeg__decoder* self,
    wuffs_base__slice_u8 a_dst_buffer,
    uint64_t a_dst_stride,
    uint32_t a_q) {
  return (*self->private_impl.choosy_decode_idct)(self, a_dst_buffer, a_dst_stride, a_q);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__decode_idct__choosy_default(
    wuffs_jpeg__decoder* self,
    wuffs_base__slice_u8 a_dst_buffer,
    uint64_t a_dst_stride,
    uint32_t a_q) {
  uint32_t v_bq0 = 0;
  uint32_t v_bq2 = 0;
  uint32_t v_bq4 = 0;
  uint32_t v_bq6 = 0;
  uint32_t v_ca = 0;
  uint32_t v_cb2 = 0;
  uint32_t v_cb6 = 0;
  uint32_t v_ccp = 0;
  uint32_t v_ccm = 0;
  uint32_t v_cd0 = 0;
  uint32_t v_cd1 = 0;
  uint32_t v_cd2 = 0;
  uint32_t v_cd3 = 0;
  uint32_t v_bq1 = 0;
  uint32_t v_bq3 = 0;
  uint32_t v_bq5 = 0;
  uint32_t v_bq7 = 0;
  uint32_t v_ci51 = 0;
  uint32_t v_ci53 = 0;
  uint32_t v_ci71 = 0;
  uint32_t v_ci73 = 0;
  uint32_t v_cj = 0;
  uint32_t v_ck1 = 0;
  uint32_t v_ck3 = 0;
  uint32_t v_ck5 = 0;
  uint32_t v_ck7 = 0;
  uint32_t v_cl51 = 0;
  uint32_t v_cl73 = 0;
  uint32_t v_in0 = 0;
  uint32_t v_in2 = 0;
  uint32_t v_in4 = 0;
  uint32_t v_in6 = 0;
  uint32_t v_ra = 0;
  uint32_t v_rb2 = 0;
  uint32_t v_rb6 = 0;
  uint32_t v_rcp = 0;
  uint32_t v_rcm = 0;
  uint32_t v_rd0 = 0;
  uint32_t v_rd1 = 0;
  uint32_t v_rd2 = 0;
  uint32_t v_rd3 = 0;
  uint32_t v_in1 = 0;
  uint32_t v_in3 = 0;
  uint32_t v_in5 = 0;
  uint32_t v_in7 = 0;
  uint32_t v_ri51 = 0;
  uint32_t v_ri53 = 0;
  uint32_t v_ri71 = 0;
  uint32_t v_ri73 = 0;
  uint32_t v_rj = 0;
  uint32_t v_rk1 = 0;
  uint32_t v_rk3 = 0;
  uint32_t v_rk5 = 0;
  uint32_t v_rk7 = 0;
  uint32_t v_rl51 = 0;
  uint32_t v_rl73 = 0;
  uint32_t v_intermediate[64] = {0};

  if (8u > a_dst_stride) {
    return wuffs_base__make_empty_struct();
  }
  if (0u == (self->private_data.f_mcu_blocks[0u][8u] |
      self->private_data.f_mcu_blocks[0u][16u] |
      self->private_data.f_mcu_blocks[0u][24u] |
      self->private_data.f_mcu_blocks[0u][32u] |
      self->private_data.f_mcu_blocks[0u][40u] |
      self->private_data.f_mcu_blocks[0u][48u] |
      self->private_data.f_mcu_blocks[0u][56u])) {
    v_intermediate[0u] = ((uint32_t)(((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][0u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][0u])))) << 2u));
    v_intermediate[8u] = v_intermediate[0u];
    v_intermediate[16u] = v_intermediate[0u];
    v_intermediate[24u] = v_intermediate[0u];
    v_intermediate[32u] = v_intermediate[0u];
    v_intermediate[40u] = v_intermediate[0u];
    v_intermediate[48u] = v_intermediate[0u];
    v_intermediate[56u] = v_intermediate[0u];
  } else {
    v_bq2 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][16u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][16u]))));
    v_bq6 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][48u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][48u]))));
    v_ca = ((uint32_t)(((uint32_t)(v_bq2 + v_bq6)) * 4433u));
    v_cb2 = ((uint32_t)(v_ca + ((uint32_t)(v_bq2 * 6270u))));
    v_cb6 = ((uint32_t)(v_ca - ((uint32_t)(v_bq6 * 15137u))));
    v_bq0 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][0u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][0u]))));
    v_bq4 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][32u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][32u]))));
    v_ccp = ((uint32_t)(((uint32_t)(v_bq0 + v_bq4)) << 13u));
    v_ccm = ((uint32_t)(((uint32_t)(v_bq0 - v_bq4)) << 13u));
    v_cd0 = ((uint32_t)(v_ccp + v_cb2));
    v_cd1 = ((uint32_t)(v_ccm + v_cb6));
    v_cd2 = ((uint32_t)(v_ccm - v_cb6));
    v_cd3 = ((uint32_t)(v_ccp - v_cb2));
    v_bq1 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][8u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][8u]))));
    v_bq3 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][24u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][24u]))));
    v_bq5 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][40u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][40u]))));
    v_bq7 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][56u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][56u]))));
    v_ci51 = ((uint32_t)(v_bq5 + v_bq1));
    v_ci53 = ((uint32_t)(v_bq5 + v_bq3));
    v_ci71 = ((uint32_t)(v_bq7 + v_bq1));
    v_ci73 = ((uint32_t)(v_bq7 + v_bq3));
    v_cj = ((uint32_t)(((uint32_t)(v_ci73 + v_ci51)) * 9633u));
    v_ck1 = ((uint32_t)(v_bq1 * 12299u));
    v_ck3 = ((uint32_t)(v_bq3 * 25172u));
    v_ck5 = ((uint32_t)(v_bq5 * 16819u));
    v_ck7 = ((uint32_t)(v_bq7 * 2446u));
    v_ci51 *= 4294964100u;
    v_ci53 *= 4294946301u;
    v_ci71 *= 4294959923u;
    v_ci73 *= 4294951227u;
    v_cl51 = ((uint32_t)(v_ci51 + v_cj));
    v_cl73 = ((uint32_t)(v_ci73 + v_cj));
    v_ck1 += ((uint32_t)(v_ci71 + v_cl51));
    v_ck3 += ((uint32_t)(v_ci53 + v_cl73));
    v_ck5 += ((uint32_t)(v_ci53 + v_cl51));
    v_ck7 += ((uint32_t)(v_ci71 + v_cl73));
    v_intermediate[0u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 + v_ck1)) + 1024u)), 11u);
    v_intermediate[56u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 - v_ck1)) + 1024u)), 11u);
    v_intermediate[8u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 + v_ck3)) + 1024u)), 11u);
    v_intermediate[48u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 - v_ck3)) + 1024u)), 11u);
    v_intermediate[16u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 + v_ck5)) + 1024u)), 11u);
    v_intermediate[40u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 - v_ck5)) + 1024u)), 11u);
    v_intermediate[24u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 + v_ck7)) + 1024u)), 11u);
    v_intermediate[32u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 - v_ck7)) + 1024u)), 11u);
  }
  if (0u == (self->private_data.f_mcu_blocks[0u][9u] |
      self->private_data.f_mcu_blocks[0u][17u] |
      self->private_data.f_mcu_blocks[0u][25u] |
      self->private_data.f_mcu_blocks[0u][33u] |
      self->private_data.f_mcu_blocks[0u][41u] |
      self->private_data.f_mcu_blocks[0u][49u] |
      self->private_data.f_mcu_blocks[0u][57u])) {
    v_intermediate[1u] = ((uint32_t)(((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][1u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][1u])))) << 2u));
    v_intermediate[9u] = v_intermediate[1u];
    v_intermediate[17u] = v_intermediate[1u];
    v_intermediate[25u] = v_intermediate[1u];
    v_intermediate[33u] = v_intermediate[1u];
    v_intermediate[41u] = v_intermediate[1u];
    v_intermediate[49u] = v_intermediate[1u];
    v_intermediate[57u] = v_intermediate[1u];
  } else {
    v_bq2 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][17u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][17u]))));
    v_bq6 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][49u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][49u]))));
    v_ca = ((uint32_t)(((uint32_t)(v_bq2 + v_bq6)) * 4433u));
    v_cb2 = ((uint32_t)(v_ca + ((uint32_t)(v_bq2 * 6270u))));
    v_cb6 = ((uint32_t)(v_ca - ((uint32_t)(v_bq6 * 15137u))));
    v_bq0 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][1u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][1u]))));
    v_bq4 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][33u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][33u]))));
    v_ccp = ((uint32_t)(((uint32_t)(v_bq0 + v_bq4)) << 13u));
    v_ccm = ((uint32_t)(((uint32_t)(v_bq0 - v_bq4)) << 13u));
    v_cd0 = ((uint32_t)(v_ccp + v_cb2));
    v_cd1 = ((uint32_t)(v_ccm + v_cb6));
    v_cd2 = ((uint32_t)(v_ccm - v_cb6));
    v_cd3 = ((uint32_t)(v_ccp - v_cb2));
    v_bq1 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][9u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][9u]))));
    v_bq3 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][25u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][25u]))));
    v_bq5 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][41u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][41u]))));
    v_bq7 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][57u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][57u]))));
    v_ci51 = ((uint32_t)(v_bq5 + v_bq1));
    v_ci53 = ((uint32_t)(v_bq5 + v_bq3));
    v_ci71 = ((uint32_t)(v_bq7 + v_bq1));
    v_ci73 = ((uint32_t)(v_bq7 + v_bq3));
    v_cj = ((uint32_t)(((uint32_t)(v_ci73 + v_ci51)) * 9633u));
    v_ck1 = ((uint32_t)(v_bq1 * 12299u));
    v_ck3 = ((uint32_t)(v_bq3 * 25172u));
    v_ck5 = ((uint32_t)(v_bq5 * 16819u));
    v_ck7 = ((uint32_t)(v_bq7 * 2446u));
    v_ci51 *= 4294964100u;
    v_ci53 *= 4294946301u;
    v_ci71 *= 4294959923u;
    v_ci73 *= 4294951227u;
    v_cl51 = ((uint32_t)(v_ci51 + v_cj));
    v_cl73 = ((uint32_t)(v_ci73 + v_cj));
    v_ck1 += ((uint32_t)(v_ci71 + v_cl51));
    v_ck3 += ((uint32_t)(v_ci53 + v_cl73));
    v_ck5 += ((uint32_t)(v_ci53 + v_cl51));
    v_ck7 += ((uint32_t)(v_ci71 + v_cl73));
    v_intermediate[1u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 + v_ck1)) + 1024u)), 11u);
    v_intermediate[57u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 - v_ck1)) + 1024u)), 11u);
    v_intermediate[9u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 + v_ck3)) + 1024u)), 11u);
    v_intermediate[49u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 - v_ck3)) + 1024u)), 11u);
    v_intermediate[17u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 + v_ck5)) + 1024u)), 11u);
    v_intermediate[41u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 - v_ck5)) + 1024u)), 11u);
    v_intermediate[25u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 + v_ck7)) + 1024u)), 11u);
    v_intermediate[33u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 - v_ck7)) + 1024u)), 11u);
  }
  if (0u == (self->private_data.f_mcu_blocks[0u][10u] |
      self->private_data.f_mcu_blocks[0u][18u] |
      self->private_data.f_mcu_blocks[0u][26u] |
      self->private_data.f_mcu_blocks[0u][34u] |
      self->private_data.f_mcu_blocks[0u][42u] |
      self->private_data.f_mcu_blocks[0u][50u] |
      self->private_data.f_mcu_blocks[0u][58u])) {
    v_intermediate[2u] = ((uint32_t)(((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][2u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][2u])))) << 2u));
    v_intermediate[10u] = v_intermediate[2u];
    v_intermediate[18u] = v_intermediate[2u];
    v_intermediate[26u] = v_intermediate[2u];
    v_intermediate[34u] = v_intermediate[2u];
    v_intermediate[42u] = v_intermediate[2u];
    v_intermediate[50u] = v_intermediate[2u];
    v_intermediate[58u] = v_intermediate[2u];
  } else {
    v_bq2 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][18u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][18u]))));
    v_bq6 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][50u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][50u]))));
    v_ca = ((uint32_t)(((uint32_t)(v_bq2 + v_bq6)) * 4433u));
    v_cb2 = ((uint32_t)(v_ca + ((uint32_t)(v_bq2 * 6270u))));
    v_cb6 = ((uint32_t)(v_ca - ((uint32_t)(v_bq6 * 15137u))));
    v_bq0 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][2u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][2u]))));
    v_bq4 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][34u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][34u]))));
    v_ccp = ((uint32_t)(((uint32_t)(v_bq0 + v_bq4)) << 13u));
    v_ccm = ((uint32_t)(((uint32_t)(v_bq0 - v_bq4)) << 13u));
    v_cd0 = ((uint32_t)(v_ccp + v_cb2));
    v_cd1 = ((uint32_t)(v_ccm + v_cb6));
    v_cd2 = ((uint32_t)(v_ccm - v_cb6));
    v_cd3 = ((uint32_t)(v_ccp - v_cb2));
    v_bq1 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][10u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][10u]))));
    v_bq3 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][26u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][26u]))));
    v_bq5 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][42u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][42u]))));
    v_bq7 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][58u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][58u]))));
    v_ci51 = ((uint32_t)(v_bq5 + v_bq1));
    v_ci53 = ((uint32_t)(v_bq5 + v_bq3));
    v_ci71 = ((uint32_t)(v_bq7 + v_bq1));
    v_ci73 = ((uint32_t)(v_bq7 + v_bq3));
    v_cj = ((uint32_t)(((uint32_t)(v_ci73 + v_ci51)) * 9633u));
    v_ck1 = ((uint32_t)(v_bq1 * 12299u));
    v_ck3 = ((uint32_t)(v_bq3 * 25172u));
    v_ck5 = ((uint32_t)(v_bq5 * 16819u));
    v_ck7 = ((uint32_t)(v_bq7 * 2446u));
    v_ci51 *= 4294964100u;
    v_ci53 *= 4294946301u;
    v_ci71 *= 4294959923u;
    v_ci73 *= 4294951227u;
    v_cl51 = ((uint32_t)(v_ci51 + v_cj));
    v_cl73 = ((uint32_t)(v_ci73 + v_cj));
    v_ck1 += ((uint32_t)(v_ci71 + v_cl51));
    v_ck3 += ((uint32_t)(v_ci53 + v_cl73));
    v_ck5 += ((uint32_t)(v_ci53 + v_cl51));
    v_ck7 += ((uint32_t)(v_ci71 + v_cl73));
    v_intermediate[2u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 + v_ck1)) + 1024u)), 11u);
    v_intermediate[58u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 - v_ck1)) + 1024u)), 11u);
    v_intermediate[10u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 + v_ck3)) + 1024u)), 11u);
    v_intermediate[50u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 - v_ck3)) + 1024u)), 11u);
    v_intermediate[18u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 + v_ck5)) + 1024u)), 11u);
    v_intermediate[42u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 - v_ck5)) + 1024u)), 11u);
    v_intermediate[26u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 + v_ck7)) + 1024u)), 11u);
    v_intermediate[34u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 - v_ck7)) + 1024u)), 11u);
  }
  if (0u == (self->private_data.f_mcu_blocks[0u][11u] |
      self->private_data.f_mcu_blocks[0u][19u] |
      self->private_data.f_mcu_blocks[0u][27u] |
      self->private_data.f_mcu_blocks[0u][35u] |
      self->private_data.f_mcu_blocks[0u][43u] |
      self->private_data.f_mcu_blocks[0u][51u] |
      self->private_data.f_mcu_blocks[0u][59u])) {
    v_intermediate[3u] = ((uint32_t)(((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][3u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][3u])))) << 2u));
    v_intermediate[11u] = v_intermediate[3u];
    v_intermediate[19u] = v_intermediate[3u];
    v_intermediate[27u] = v_intermediate[3u];
    v_intermediate[35u] = v_intermediate[3u];
    v_intermediate[43u] = v_intermediate[3u];
    v_intermediate[51u] = v_intermediate[3u];
    v_intermediate[59u] = v_intermediate[3u];
  } else {
    v_bq2 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][19u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][19u]))));
    v_bq6 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][51u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][51u]))));
    v_ca = ((uint32_t)(((uint32_t)(v_bq2 + v_bq6)) * 4433u));
    v_cb2 = ((uint32_t)(v_ca + ((uint32_t)(v_bq2 * 6270u))));
    v_cb6 = ((uint32_t)(v_ca - ((uint32_t)(v_bq6 * 15137u))));
    v_bq0 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][3u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][3u]))));
    v_bq4 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][35u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][35u]))));
    v_ccp = ((uint32_t)(((uint32_t)(v_bq0 + v_bq4)) << 13u));
    v_ccm = ((uint32_t)(((uint32_t)(v_bq0 - v_bq4)) << 13u));
    v_cd0 = ((uint32_t)(v_ccp + v_cb2));
    v_cd1 = ((uint32_t)(v_ccm + v_cb6));
    v_cd2 = ((uint32_t)(v_ccm - v_cb6));
    v_cd3 = ((uint32_t)(v_ccp - v_cb2));
    v_bq1 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][11u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][11u]))));
    v_bq3 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][27u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][27u]))));
    v_bq5 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][43u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][43u]))));
    v_bq7 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][59u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][59u]))));
    v_ci51 = ((uint32_t)(v_bq5 + v_bq1));
    v_ci53 = ((uint32_t)(v_bq5 + v_bq3));
    v_ci71 = ((uint32_t)(v_bq7 + v_bq1));
    v_ci73 = ((uint32_t)(v_bq7 + v_bq3));
    v_cj = ((uint32_t)(((uint32_t)(v_ci73 + v_ci51)) * 9633u));
    v_ck1 = ((uint32_t)(v_bq1 * 12299u));
    v_ck3 = ((uint32_t)(v_bq3 * 25172u));
    v_ck5 = ((uint32_t)(v_bq5 * 16819u));
    v_ck7 = ((uint32_t)(v_bq7 * 2446u));
    v_ci51 *= 4294964100u;
    v_ci53 *= 4294946301u;
    v_ci71 *= 4294959923u;
    v_ci73 *= 4294951227u;
    v_cl51 = ((uint32_t)(v_ci51 + v_cj));
    v_cl73 = ((uint32_t)(v_ci73 + v_cj));
    v_ck1 += ((uint32_t)(v_ci71 + v_cl51));
    v_ck3 += ((uint32_t)(v_ci53 + v_cl73));
    v_ck5 += ((uint32_t)(v_ci53 + v_cl51));
    v_ck7 += ((uint32_t)(v_ci71 + v_cl73));
    v_intermediate[3u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 + v_ck1)) + 1024u)), 11u);
    v_intermediate[59u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 - v_ck1)) + 1024u)), 11u);
    v_intermediate[11u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 + v_ck3)) + 1024u)), 11u);
    v_intermediate[51u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 - v_ck3)) + 1024u)), 11u);
    v_intermediate[19u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 + v_ck5)) + 1024u)), 11u);
    v_intermediate[43u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 - v_ck5)) + 1024u)), 11u);
    v_intermediate[27u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 + v_ck7)) + 1024u)), 11u);
    v_intermediate[35u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 - v_ck7)) + 1024u)), 11u);
  }
  if (0u == (self->private_data.f_mcu_blocks[0u][12u] |
      self->private_data.f_mcu_blocks[0u][20u] |
      self->private_data.f_mcu_blocks[0u][28u] |
      self->private_data.f_mcu_blocks[0u][36u] |
      self->private_data.f_mcu_blocks[0u][44u] |
      self->private_data.f_mcu_blocks[0u][52u] |
      self->private_data.f_mcu_blocks[0u][60u])) {
    v_intermediate[4u] = ((uint32_t)(((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][4u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][4u])))) << 2u));
    v_intermediate[12u] = v_intermediate[4u];
    v_intermediate[20u] = v_intermediate[4u];
    v_intermediate[28u] = v_intermediate[4u];
    v_intermediate[36u] = v_intermediate[4u];
    v_intermediate[44u] = v_intermediate[4u];
    v_intermediate[52u] = v_intermediate[4u];
    v_intermediate[60u] = v_intermediate[4u];
  } else {
    v_bq2 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][20u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][20u]))));
    v_bq6 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][52u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][52u]))));
    v_ca = ((uint32_t)(((uint32_t)(v_bq2 + v_bq6)) * 4433u));
    v_cb2 = ((uint32_t)(v_ca + ((uint32_t)(v_bq2 * 6270u))));
    v_cb6 = ((uint32_t)(v_ca - ((uint32_t)(v_bq6 * 15137u))));
    v_bq0 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][4u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][4u]))));
    v_bq4 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][36u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][36u]))));
    v_ccp = ((uint32_t)(((uint32_t)(v_bq0 + v_bq4)) << 13u));
    v_ccm = ((uint32_t)(((uint32_t)(v_bq0 - v_bq4)) << 13u));
    v_cd0 = ((uint32_t)(v_ccp + v_cb2));
    v_cd1 = ((uint32_t)(v_ccm + v_cb6));
    v_cd2 = ((uint32_t)(v_ccm - v_cb6));
    v_cd3 = ((uint32_t)(v_ccp - v_cb2));
    v_bq1 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][12u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][12u]))));
    v_bq3 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][28u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][28u]))));
    v_bq5 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][44u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][44u]))));
    v_bq7 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][60u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][60u]))));
    v_ci51 = ((uint32_t)(v_bq5 + v_bq1));
    v_ci53 = ((uint32_t)(v_bq5 + v_bq3));
    v_ci71 = ((uint32_t)(v_bq7 + v_bq1));
    v_ci73 = ((uint32_t)(v_bq7 + v_bq3));
    v_cj = ((uint32_t)(((uint32_t)(v_ci73 + v_ci51)) * 9633u));
    v_ck1 = ((uint32_t)(v_bq1 * 12299u));
    v_ck3 = ((uint32_t)(v_bq3 * 25172u));
    v_ck5 = ((uint32_t)(v_bq5 * 16819u));
    v_ck7 = ((uint32_t)(v_bq7 * 2446u));
    v_ci51 *= 4294964100u;
    v_ci53 *= 4294946301u;
    v_ci71 *= 4294959923u;
    v_ci73 *= 4294951227u;
    v_cl51 = ((uint32_t)(v_ci51 + v_cj));
    v_cl73 = ((uint32_t)(v_ci73 + v_cj));
    v_ck1 += ((uint32_t)(v_ci71 + v_cl51));
    v_ck3 += ((uint32_t)(v_ci53 + v_cl73));
    v_ck5 += ((uint32_t)(v_ci53 + v_cl51));
    v_ck7 += ((uint32_t)(v_ci71 + v_cl73));
    v_intermediate[4u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 + v_ck1)) + 1024u)), 11u);
    v_intermediate[60u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 - v_ck1)) + 1024u)), 11u);
    v_intermediate[12u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 + v_ck3)) + 1024u)), 11u);
    v_intermediate[52u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 - v_ck3)) + 1024u)), 11u);
    v_intermediate[20u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 + v_ck5)) + 1024u)), 11u);
    v_intermediate[44u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 - v_ck5)) + 1024u)), 11u);
    v_intermediate[28u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 + v_ck7)) + 1024u)), 11u);
    v_intermediate[36u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 - v_ck7)) + 1024u)), 11u);
  }
  if (0u == (self->private_data.f_mcu_blocks[0u][13u] |
      self->private_data.f_mcu_blocks[0u][21u] |
      self->private_data.f_mcu_blocks[0u][29u] |
      self->private_data.f_mcu_blocks[0u][37u] |
      self->private_data.f_mcu_blocks[0u][45u] |
      self->private_data.f_mcu_blocks[0u][53u] |
      self->private_data.f_mcu_blocks[0u][61u])) {
    v_intermediate[5u] = ((uint32_t)(((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][5u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][5u])))) << 2u));
    v_intermediate[13u] = v_intermediate[5u];
    v_intermediate[21u] = v_intermediate[5u];
    v_intermediate[29u] = v_intermediate[5u];
    v_intermediate[37u] = v_intermediate[5u];
    v_intermediate[45u] = v_intermediate[5u];
    v_intermediate[53u] = v_intermediate[5u];
    v_intermediate[61u] = v_intermediate[5u];
  } else {
    v_bq2 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][21u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][21u]))));
    v_bq6 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][53u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][53u]))));
    v_ca = ((uint32_t)(((uint32_t)(v_bq2 + v_bq6)) * 4433u));
    v_cb2 = ((uint32_t)(v_ca + ((uint32_t)(v_bq2 * 6270u))));
    v_cb6 = ((uint32_t)(v_ca - ((uint32_t)(v_bq6 * 15137u))));
    v_bq0 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][5u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][5u]))));
    v_bq4 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][37u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][37u]))));
    v_ccp = ((uint32_t)(((uint32_t)(v_bq0 + v_bq4)) << 13u));
    v_ccm = ((uint32_t)(((uint32_t)(v_bq0 - v_bq4)) << 13u));
    v_cd0 = ((uint32_t)(v_ccp + v_cb2));
    v_cd1 = ((uint32_t)(v_ccm + v_cb6));
    v_cd2 = ((uint32_t)(v_ccm - v_cb6));
    v_cd3 = ((uint32_t)(v_ccp - v_cb2));
    v_bq1 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][13u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][13u]))));
    v_bq3 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][29u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][29u]))));
    v_bq5 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][45u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][45u]))));
    v_bq7 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][61u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][61u]))));
    v_ci51 = ((uint32_t)(v_bq5 + v_bq1));
    v_ci53 = ((uint32_t)(v_bq5 + v_bq3));
    v_ci71 = ((uint32_t)(v_bq7 + v_bq1));
    v_ci73 = ((uint32_t)(v_bq7 + v_bq3));
    v_cj = ((uint32_t)(((uint32_t)(v_ci73 + v_ci51)) * 9633u));
    v_ck1 = ((uint32_t)(v_bq1 * 12299u));
    v_ck3 = ((uint32_t)(v_bq3 * 25172u));
    v_ck5 = ((uint32_t)(v_bq5 * 16819u));
    v_ck7 = ((uint32_t)(v_bq7 * 2446u));
    v_ci51 *= 4294964100u;
    v_ci53 *= 4294946301u;
    v_ci71 *= 4294959923u;
    v_ci73 *= 4294951227u;
    v_cl51 = ((uint32_t)(v_ci51 + v_cj));
    v_cl73 = ((uint32_t)(v_ci73 + v_cj));
    v_ck1 += ((uint32_t)(v_ci71 + v_cl51));
    v_ck3 += ((uint32_t)(v_ci53 + v_cl73));
    v_ck5 += ((uint32_t)(v_ci53 + v_cl51));
    v_ck7 += ((uint32_t)(v_ci71 + v_cl73));
    v_intermediate[5u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 + v_ck1)) + 1024u)), 11u);
    v_intermediate[61u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 - v_ck1)) + 1024u)), 11u);
    v_intermediate[13u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 + v_ck3)) + 1024u)), 11u);
    v_intermediate[53u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 - v_ck3)) + 1024u)), 11u);
    v_intermediate[21u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 + v_ck5)) + 1024u)), 11u);
    v_intermediate[45u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 - v_ck5)) + 1024u)), 11u);
    v_intermediate[29u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 + v_ck7)) + 1024u)), 11u);
    v_intermediate[37u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 - v_ck7)) + 1024u)), 11u);
  }
  if (0u == (self->private_data.f_mcu_blocks[0u][14u] |
      self->private_data.f_mcu_blocks[0u][22u] |
      self->private_data.f_mcu_blocks[0u][30u] |
      self->private_data.f_mcu_blocks[0u][38u] |
      self->private_data.f_mcu_blocks[0u][46u] |
      self->private_data.f_mcu_blocks[0u][54u] |
      self->private_data.f_mcu_blocks[0u][62u])) {
    v_intermediate[6u] = ((uint32_t)(((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][6u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][6u])))) << 2u));
    v_intermediate[14u] = v_intermediate[6u];
    v_intermediate[22u] = v_intermediate[6u];
    v_intermediate[30u] = v_intermediate[6u];
    v_intermediate[38u] = v_intermediate[6u];
    v_intermediate[46u] = v_intermediate[6u];
    v_intermediate[54u] = v_intermediate[6u];
    v_intermediate[62u] = v_intermediate[6u];
  } else {
    v_bq2 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][22u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][22u]))));
    v_bq6 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][54u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][54u]))));
    v_ca = ((uint32_t)(((uint32_t)(v_bq2 + v_bq6)) * 4433u));
    v_cb2 = ((uint32_t)(v_ca + ((uint32_t)(v_bq2 * 6270u))));
    v_cb6 = ((uint32_t)(v_ca - ((uint32_t)(v_bq6 * 15137u))));
    v_bq0 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][6u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][6u]))));
    v_bq4 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][38u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][38u]))));
    v_ccp = ((uint32_t)(((uint32_t)(v_bq0 + v_bq4)) << 13u));
    v_ccm = ((uint32_t)(((uint32_t)(v_bq0 - v_bq4)) << 13u));
    v_cd0 = ((uint32_t)(v_ccp + v_cb2));
    v_cd1 = ((uint32_t)(v_ccm + v_cb6));
    v_cd2 = ((uint32_t)(v_ccm - v_cb6));
    v_cd3 = ((uint32_t)(v_ccp - v_cb2));
    v_bq1 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][14u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][14u]))));
    v_bq3 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][30u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][30u]))));
    v_bq5 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][46u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][46u]))));
    v_bq7 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][62u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][62u]))));
    v_ci51 = ((uint32_t)(v_bq5 + v_bq1));
    v_ci53 = ((uint32_t)(v_bq5 + v_bq3));
    v_ci71 = ((uint32_t)(v_bq7 + v_bq1));
    v_ci73 = ((uint32_t)(v_bq7 + v_bq3));
    v_cj = ((uint32_t)(((uint32_t)(v_ci73 + v_ci51)) * 9633u));
    v_ck1 = ((uint32_t)(v_bq1 * 12299u));
    v_ck3 = ((uint32_t)(v_bq3 * 25172u));
    v_ck5 = ((uint32_t)(v_bq5 * 16819u));
    v_ck7 = ((uint32_t)(v_bq7 * 2446u));
    v_ci51 *= 4294964100u;
    v_ci53 *= 4294946301u;
    v_ci71 *= 4294959923u;
    v_ci73 *= 4294951227u;
    v_cl51 = ((uint32_t)(v_ci51 + v_cj));
    v_cl73 = ((uint32_t)(v_ci73 + v_cj));
    v_ck1 += ((uint32_t)(v_ci71 + v_cl51));
    v_ck3 += ((uint32_t)(v_ci53 + v_cl73));
    v_ck5 += ((uint32_t)(v_ci53 + v_cl51));
    v_ck7 += ((uint32_t)(v_ci71 + v_cl73));
    v_intermediate[6u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 + v_ck1)) + 1024u)), 11u);
    v_intermediate[62u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 - v_ck1)) + 1024u)), 11u);
    v_intermediate[14u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 + v_ck3)) + 1024u)), 11u);
    v_intermediate[54u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 - v_ck3)) + 1024u)), 11u);
    v_intermediate[22u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 + v_ck5)) + 1024u)), 11u);
    v_intermediate[46u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 - v_ck5)) + 1024u)), 11u);
    v_intermediate[30u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 + v_ck7)) + 1024u)), 11u);
    v_intermediate[38u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 - v_ck7)) + 1024u)), 11u);
  }
  if (0u == (self->private_data.f_mcu_blocks[0u][15u] |
      self->private_data.f_mcu_blocks[0u][23u] |
      self->private_data.f_mcu_blocks[0u][31u] |
      self->private_data.f_mcu_blocks[0u][39u] |
      self->private_data.f_mcu_blocks[0u][47u] |
      self->private_data.f_mcu_blocks[0u][55u] |
      self->private_data.f_mcu_blocks[0u][63u])) {
    v_intermediate[7u] = ((uint32_t)(((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][7u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][7u])))) << 2u));
    v_intermediate[15u] = v_intermediate[7u];
    v_intermediate[23u] = v_intermediate[7u];
    v_intermediate[31u] = v_intermediate[7u];
    v_intermediate[39u] = v_intermediate[7u];
    v_intermediate[47u] = v_intermediate[7u];
    v_intermediate[55u] = v_intermediate[7u];
    v_intermediate[63u] = v_intermediate[7u];
  } else {
    v_bq2 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][23u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][23u]))));
    v_bq6 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][55u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][55u]))));
    v_ca = ((uint32_t)(((uint32_t)(v_bq2 + v_bq6)) * 4433u));
    v_cb2 = ((uint32_t)(v_ca + ((uint32_t)(v_bq2 * 6270u))));
    v_cb6 = ((uint32_t)(v_ca - ((uint32_t)(v_bq6 * 15137u))));
    v_bq0 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][7u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][7u]))));
    v_bq4 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][39u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][39u]))));
    v_ccp = ((uint32_t)(((uint32_t)(v_bq0 + v_bq4)) << 13u));
    v_ccm = ((uint32_t)(((uint32_t)(v_bq0 - v_bq4)) << 13u));
    v_cd0 = ((uint32_t)(v_ccp + v_cb2));
    v_cd1 = ((uint32_t)(v_ccm + v_cb6));
    v_cd2 = ((uint32_t)(v_ccm - v_cb6));
    v_cd3 = ((uint32_t)(v_ccp - v_cb2));
    v_bq1 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][15u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][15u]))));
    v_bq3 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][31u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][31u]))));
    v_bq5 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][47u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][47u]))));
    v_bq7 = ((uint32_t)(wuffs_base__utility__sign_extend_convert_u16_u32(self->private_data.f_mcu_blocks[0u][63u]) * ((uint32_t)(self->private_impl.f_quant_tables[a_q][63u]))));
    v_ci51 = ((uint32_t)(v_bq5 + v_bq1));
    v_ci53 = ((uint32_t)(v_bq5 + v_bq3));
    v_ci71 = ((uint32_t)(v_bq7 + v_bq1));
    v_ci73 = ((uint32_t)(v_bq7 + v_bq3));
    v_cj = ((uint32_t)(((uint32_t)(v_ci73 + v_ci51)) * 9633u));
    v_ck1 = ((uint32_t)(v_bq1 * 12299u));
    v_ck3 = ((uint32_t)(v_bq3 * 25172u));
    v_ck5 = ((uint32_t)(v_bq5 * 16819u));
    v_ck7 = ((uint32_t)(v_bq7 * 2446u));
    v_ci51 *= 4294964100u;
    v_ci53 *= 4294946301u;
    v_ci71 *= 4294959923u;
    v_ci73 *= 4294951227u;
    v_cl51 = ((uint32_t)(v_ci51 + v_cj));
    v_cl73 = ((uint32_t)(v_ci73 + v_cj));
    v_ck1 += ((uint32_t)(v_ci71 + v_cl51));
    v_ck3 += ((uint32_t)(v_ci53 + v_cl73));
    v_ck5 += ((uint32_t)(v_ci53 + v_cl51));
    v_ck7 += ((uint32_t)(v_ci71 + v_cl73));
    v_intermediate[7u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 + v_ck1)) + 1024u)), 11u);
    v_intermediate[63u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd0 - v_ck1)) + 1024u)), 11u);
    v_intermediate[15u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 + v_ck3)) + 1024u)), 11u);
    v_intermediate[55u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd1 - v_ck3)) + 1024u)), 11u);
    v_intermediate[23u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 + v_ck5)) + 1024u)), 11u);
    v_intermediate[47u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd2 - v_ck5)) + 1024u)), 11u);
    v_intermediate[31u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 + v_ck7)) + 1024u)), 11u);
    v_intermediate[39u] = wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(((uint32_t)(v_cd3 - v_ck7)) + 1024u)), 11u);
  }
  if (0u == (v_intermediate[1u] |
      v_intermediate[2u] |
      v_intermediate[3u] |
      v_intermediate[4u] |
      v_intermediate[5u] |
      v_intermediate[6u] |
      v_intermediate[7u])) {
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(v_intermediate[0u] + 16u)) >> 5u) & 1023u)];
    a_dst_buffer.ptr[1u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[2u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[3u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[4u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[5u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[6u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[7u] = a_dst_buffer.ptr[0u];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  } else {
    v_in2 = v_intermediate[2u];
    v_in6 = v_intermediate[6u];
    v_ra = ((uint32_t)(((uint32_t)(v_in2 + v_in6)) * 4433u));
    v_rb2 = ((uint32_t)(v_ra + ((uint32_t)(v_in2 * 6270u))));
    v_rb6 = ((uint32_t)(v_ra - ((uint32_t)(v_in6 * 15137u))));
    v_in0 = v_intermediate[0u];
    v_in4 = v_intermediate[4u];
    v_rcp = ((uint32_t)(((uint32_t)(v_in0 + v_in4)) << 13u));
    v_rcm = ((uint32_t)(((uint32_t)(v_in0 - v_in4)) << 13u));
    v_rd0 = ((uint32_t)(v_rcp + v_rb2));
    v_rd1 = ((uint32_t)(v_rcm + v_rb6));
    v_rd2 = ((uint32_t)(v_rcm - v_rb6));
    v_rd3 = ((uint32_t)(v_rcp - v_rb2));
    v_in1 = v_intermediate[1u];
    v_in3 = v_intermediate[3u];
    v_in5 = v_intermediate[5u];
    v_in7 = v_intermediate[7u];
    v_ri51 = ((uint32_t)(v_in5 + v_in1));
    v_ri53 = ((uint32_t)(v_in5 + v_in3));
    v_ri71 = ((uint32_t)(v_in7 + v_in1));
    v_ri73 = ((uint32_t)(v_in7 + v_in3));
    v_rj = ((uint32_t)(((uint32_t)(v_ri73 + v_ri51)) * 9633u));
    v_rk1 = ((uint32_t)(v_in1 * 12299u));
    v_rk3 = ((uint32_t)(v_in3 * 25172u));
    v_rk5 = ((uint32_t)(v_in5 * 16819u));
    v_rk7 = ((uint32_t)(v_in7 * 2446u));
    v_ri51 *= 4294964100u;
    v_ri53 *= 4294946301u;
    v_ri71 *= 4294959923u;
    v_ri73 *= 4294951227u;
    v_rl51 = ((uint32_t)(v_ri51 + v_rj));
    v_rl73 = ((uint32_t)(v_ri73 + v_rj));
    v_rk1 += ((uint32_t)(v_ri71 + v_rl51));
    v_rk3 += ((uint32_t)(v_ri53 + v_rl73));
    v_rk5 += ((uint32_t)(v_ri53 + v_rl51));
    v_rk7 += ((uint32_t)(v_ri71 + v_rl73));
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 + v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[7u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 - v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[1u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 + v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[6u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 - v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[2u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 + v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[5u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 - v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[3u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 + v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[4u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 - v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  }
  if (0u == (v_intermediate[9u] |
      v_intermediate[10u] |
      v_intermediate[11u] |
      v_intermediate[12u] |
      v_intermediate[13u] |
      v_intermediate[14u] |
      v_intermediate[15u])) {
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(v_intermediate[8u] + 16u)) >> 5u) & 1023u)];
    a_dst_buffer.ptr[1u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[2u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[3u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[4u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[5u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[6u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[7u] = a_dst_buffer.ptr[0u];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  } else {
    v_in2 = v_intermediate[10u];
    v_in6 = v_intermediate[14u];
    v_ra = ((uint32_t)(((uint32_t)(v_in2 + v_in6)) * 4433u));
    v_rb2 = ((uint32_t)(v_ra + ((uint32_t)(v_in2 * 6270u))));
    v_rb6 = ((uint32_t)(v_ra - ((uint32_t)(v_in6 * 15137u))));
    v_in0 = v_intermediate[8u];
    v_in4 = v_intermediate[12u];
    v_rcp = ((uint32_t)(((uint32_t)(v_in0 + v_in4)) << 13u));
    v_rcm = ((uint32_t)(((uint32_t)(v_in0 - v_in4)) << 13u));
    v_rd0 = ((uint32_t)(v_rcp + v_rb2));
    v_rd1 = ((uint32_t)(v_rcm + v_rb6));
    v_rd2 = ((uint32_t)(v_rcm - v_rb6));
    v_rd3 = ((uint32_t)(v_rcp - v_rb2));
    v_in1 = v_intermediate[9u];
    v_in3 = v_intermediate[11u];
    v_in5 = v_intermediate[13u];
    v_in7 = v_intermediate[15u];
    v_ri51 = ((uint32_t)(v_in5 + v_in1));
    v_ri53 = ((uint32_t)(v_in5 + v_in3));
    v_ri71 = ((uint32_t)(v_in7 + v_in1));
    v_ri73 = ((uint32_t)(v_in7 + v_in3));
    v_rj = ((uint32_t)(((uint32_t)(v_ri73 + v_ri51)) * 9633u));
    v_rk1 = ((uint32_t)(v_in1 * 12299u));
    v_rk3 = ((uint32_t)(v_in3 * 25172u));
    v_rk5 = ((uint32_t)(v_in5 * 16819u));
    v_rk7 = ((uint32_t)(v_in7 * 2446u));
    v_ri51 *= 4294964100u;
    v_ri53 *= 4294946301u;
    v_ri71 *= 4294959923u;
    v_ri73 *= 4294951227u;
    v_rl51 = ((uint32_t)(v_ri51 + v_rj));
    v_rl73 = ((uint32_t)(v_ri73 + v_rj));
    v_rk1 += ((uint32_t)(v_ri71 + v_rl51));
    v_rk3 += ((uint32_t)(v_ri53 + v_rl73));
    v_rk5 += ((uint32_t)(v_ri53 + v_rl51));
    v_rk7 += ((uint32_t)(v_ri71 + v_rl73));
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 + v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[7u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 - v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[1u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 + v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[6u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 - v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[2u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 + v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[5u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 - v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[3u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 + v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[4u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 - v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  }
  if (0u == (v_intermediate[17u] |
      v_intermediate[18u] |
      v_intermediate[19u] |
      v_intermediate[20u] |
      v_intermediate[21u] |
      v_intermediate[22u] |
      v_intermediate[23u])) {
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(v_intermediate[16u] + 16u)) >> 5u) & 1023u)];
    a_dst_buffer.ptr[1u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[2u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[3u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[4u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[5u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[6u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[7u] = a_dst_buffer.ptr[0u];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  } else {
    v_in2 = v_intermediate[18u];
    v_in6 = v_intermediate[22u];
    v_ra = ((uint32_t)(((uint32_t)(v_in2 + v_in6)) * 4433u));
    v_rb2 = ((uint32_t)(v_ra + ((uint32_t)(v_in2 * 6270u))));
    v_rb6 = ((uint32_t)(v_ra - ((uint32_t)(v_in6 * 15137u))));
    v_in0 = v_intermediate[16u];
    v_in4 = v_intermediate[20u];
    v_rcp = ((uint32_t)(((uint32_t)(v_in0 + v_in4)) << 13u));
    v_rcm = ((uint32_t)(((uint32_t)(v_in0 - v_in4)) << 13u));
    v_rd0 = ((uint32_t)(v_rcp + v_rb2));
    v_rd1 = ((uint32_t)(v_rcm + v_rb6));
    v_rd2 = ((uint32_t)(v_rcm - v_rb6));
    v_rd3 = ((uint32_t)(v_rcp - v_rb2));
    v_in1 = v_intermediate[17u];
    v_in3 = v_intermediate[19u];
    v_in5 = v_intermediate[21u];
    v_in7 = v_intermediate[23u];
    v_ri51 = ((uint32_t)(v_in5 + v_in1));
    v_ri53 = ((uint32_t)(v_in5 + v_in3));
    v_ri71 = ((uint32_t)(v_in7 + v_in1));
    v_ri73 = ((uint32_t)(v_in7 + v_in3));
    v_rj = ((uint32_t)(((uint32_t)(v_ri73 + v_ri51)) * 9633u));
    v_rk1 = ((uint32_t)(v_in1 * 12299u));
    v_rk3 = ((uint32_t)(v_in3 * 25172u));
    v_rk5 = ((uint32_t)(v_in5 * 16819u));
    v_rk7 = ((uint32_t)(v_in7 * 2446u));
    v_ri51 *= 4294964100u;
    v_ri53 *= 4294946301u;
    v_ri71 *= 4294959923u;
    v_ri73 *= 4294951227u;
    v_rl51 = ((uint32_t)(v_ri51 + v_rj));
    v_rl73 = ((uint32_t)(v_ri73 + v_rj));
    v_rk1 += ((uint32_t)(v_ri71 + v_rl51));
    v_rk3 += ((uint32_t)(v_ri53 + v_rl73));
    v_rk5 += ((uint32_t)(v_ri53 + v_rl51));
    v_rk7 += ((uint32_t)(v_ri71 + v_rl73));
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 + v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[7u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 - v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[1u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 + v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[6u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 - v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[2u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 + v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[5u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 - v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[3u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 + v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[4u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 - v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  }
  if (0u == (v_intermediate[25u] |
      v_intermediate[26u] |
      v_intermediate[27u] |
      v_intermediate[28u] |
      v_intermediate[29u] |
      v_intermediate[30u] |
      v_intermediate[31u])) {
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(v_intermediate[24u] + 16u)) >> 5u) & 1023u)];
    a_dst_buffer.ptr[1u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[2u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[3u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[4u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[5u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[6u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[7u] = a_dst_buffer.ptr[0u];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  } else {
    v_in2 = v_intermediate[26u];
    v_in6 = v_intermediate[30u];
    v_ra = ((uint32_t)(((uint32_t)(v_in2 + v_in6)) * 4433u));
    v_rb2 = ((uint32_t)(v_ra + ((uint32_t)(v_in2 * 6270u))));
    v_rb6 = ((uint32_t)(v_ra - ((uint32_t)(v_in6 * 15137u))));
    v_in0 = v_intermediate[24u];
    v_in4 = v_intermediate[28u];
    v_rcp = ((uint32_t)(((uint32_t)(v_in0 + v_in4)) << 13u));
    v_rcm = ((uint32_t)(((uint32_t)(v_in0 - v_in4)) << 13u));
    v_rd0 = ((uint32_t)(v_rcp + v_rb2));
    v_rd1 = ((uint32_t)(v_rcm + v_rb6));
    v_rd2 = ((uint32_t)(v_rcm - v_rb6));
    v_rd3 = ((uint32_t)(v_rcp - v_rb2));
    v_in1 = v_intermediate[25u];
    v_in3 = v_intermediate[27u];
    v_in5 = v_intermediate[29u];
    v_in7 = v_intermediate[31u];
    v_ri51 = ((uint32_t)(v_in5 + v_in1));
    v_ri53 = ((uint32_t)(v_in5 + v_in3));
    v_ri71 = ((uint32_t)(v_in7 + v_in1));
    v_ri73 = ((uint32_t)(v_in7 + v_in3));
    v_rj = ((uint32_t)(((uint32_t)(v_ri73 + v_ri51)) * 9633u));
    v_rk1 = ((uint32_t)(v_in1 * 12299u));
    v_rk3 = ((uint32_t)(v_in3 * 25172u));
    v_rk5 = ((uint32_t)(v_in5 * 16819u));
    v_rk7 = ((uint32_t)(v_in7 * 2446u));
    v_ri51 *= 4294964100u;
    v_ri53 *= 4294946301u;
    v_ri71 *= 4294959923u;
    v_ri73 *= 4294951227u;
    v_rl51 = ((uint32_t)(v_ri51 + v_rj));
    v_rl73 = ((uint32_t)(v_ri73 + v_rj));
    v_rk1 += ((uint32_t)(v_ri71 + v_rl51));
    v_rk3 += ((uint32_t)(v_ri53 + v_rl73));
    v_rk5 += ((uint32_t)(v_ri53 + v_rl51));
    v_rk7 += ((uint32_t)(v_ri71 + v_rl73));
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 + v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[7u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 - v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[1u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 + v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[6u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 - v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[2u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 + v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[5u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 - v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[3u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 + v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[4u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 - v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  }
  if (0u == (v_intermediate[33u] |
      v_intermediate[34u] |
      v_intermediate[35u] |
      v_intermediate[36u] |
      v_intermediate[37u] |
      v_intermediate[38u] |
      v_intermediate[39u])) {
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(v_intermediate[32u] + 16u)) >> 5u) & 1023u)];
    a_dst_buffer.ptr[1u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[2u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[3u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[4u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[5u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[6u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[7u] = a_dst_buffer.ptr[0u];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  } else {
    v_in2 = v_intermediate[34u];
    v_in6 = v_intermediate[38u];
    v_ra = ((uint32_t)(((uint32_t)(v_in2 + v_in6)) * 4433u));
    v_rb2 = ((uint32_t)(v_ra + ((uint32_t)(v_in2 * 6270u))));
    v_rb6 = ((uint32_t)(v_ra - ((uint32_t)(v_in6 * 15137u))));
    v_in0 = v_intermediate[32u];
    v_in4 = v_intermediate[36u];
    v_rcp = ((uint32_t)(((uint32_t)(v_in0 + v_in4)) << 13u));
    v_rcm = ((uint32_t)(((uint32_t)(v_in0 - v_in4)) << 13u));
    v_rd0 = ((uint32_t)(v_rcp + v_rb2));
    v_rd1 = ((uint32_t)(v_rcm + v_rb6));
    v_rd2 = ((uint32_t)(v_rcm - v_rb6));
    v_rd3 = ((uint32_t)(v_rcp - v_rb2));
    v_in1 = v_intermediate[33u];
    v_in3 = v_intermediate[35u];
    v_in5 = v_intermediate[37u];
    v_in7 = v_intermediate[39u];
    v_ri51 = ((uint32_t)(v_in5 + v_in1));
    v_ri53 = ((uint32_t)(v_in5 + v_in3));
    v_ri71 = ((uint32_t)(v_in7 + v_in1));
    v_ri73 = ((uint32_t)(v_in7 + v_in3));
    v_rj = ((uint32_t)(((uint32_t)(v_ri73 + v_ri51)) * 9633u));
    v_rk1 = ((uint32_t)(v_in1 * 12299u));
    v_rk3 = ((uint32_t)(v_in3 * 25172u));
    v_rk5 = ((uint32_t)(v_in5 * 16819u));
    v_rk7 = ((uint32_t)(v_in7 * 2446u));
    v_ri51 *= 4294964100u;
    v_ri53 *= 4294946301u;
    v_ri71 *= 4294959923u;
    v_ri73 *= 4294951227u;
    v_rl51 = ((uint32_t)(v_ri51 + v_rj));
    v_rl73 = ((uint32_t)(v_ri73 + v_rj));
    v_rk1 += ((uint32_t)(v_ri71 + v_rl51));
    v_rk3 += ((uint32_t)(v_ri53 + v_rl73));
    v_rk5 += ((uint32_t)(v_ri53 + v_rl51));
    v_rk7 += ((uint32_t)(v_ri71 + v_rl73));
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 + v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[7u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 - v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[1u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 + v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[6u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 - v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[2u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 + v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[5u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 - v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[3u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 + v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[4u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 - v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  }
  if (0u == (v_intermediate[41u] |
      v_intermediate[42u] |
      v_intermediate[43u] |
      v_intermediate[44u] |
      v_intermediate[45u] |
      v_intermediate[46u] |
      v_intermediate[47u])) {
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(v_intermediate[40u] + 16u)) >> 5u) & 1023u)];
    a_dst_buffer.ptr[1u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[2u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[3u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[4u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[5u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[6u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[7u] = a_dst_buffer.ptr[0u];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  } else {
    v_in2 = v_intermediate[42u];
    v_in6 = v_intermediate[46u];
    v_ra = ((uint32_t)(((uint32_t)(v_in2 + v_in6)) * 4433u));
    v_rb2 = ((uint32_t)(v_ra + ((uint32_t)(v_in2 * 6270u))));
    v_rb6 = ((uint32_t)(v_ra - ((uint32_t)(v_in6 * 15137u))));
    v_in0 = v_intermediate[40u];
    v_in4 = v_intermediate[44u];
    v_rcp = ((uint32_t)(((uint32_t)(v_in0 + v_in4)) << 13u));
    v_rcm = ((uint32_t)(((uint32_t)(v_in0 - v_in4)) << 13u));
    v_rd0 = ((uint32_t)(v_rcp + v_rb2));
    v_rd1 = ((uint32_t)(v_rcm + v_rb6));
    v_rd2 = ((uint32_t)(v_rcm - v_rb6));
    v_rd3 = ((uint32_t)(v_rcp - v_rb2));
    v_in1 = v_intermediate[41u];
    v_in3 = v_intermediate[43u];
    v_in5 = v_intermediate[45u];
    v_in7 = v_intermediate[47u];
    v_ri51 = ((uint32_t)(v_in5 + v_in1));
    v_ri53 = ((uint32_t)(v_in5 + v_in3));
    v_ri71 = ((uint32_t)(v_in7 + v_in1));
    v_ri73 = ((uint32_t)(v_in7 + v_in3));
    v_rj = ((uint32_t)(((uint32_t)(v_ri73 + v_ri51)) * 9633u));
    v_rk1 = ((uint32_t)(v_in1 * 12299u));
    v_rk3 = ((uint32_t)(v_in3 * 25172u));
    v_rk5 = ((uint32_t)(v_in5 * 16819u));
    v_rk7 = ((uint32_t)(v_in7 * 2446u));
    v_ri51 *= 4294964100u;
    v_ri53 *= 4294946301u;
    v_ri71 *= 4294959923u;
    v_ri73 *= 4294951227u;
    v_rl51 = ((uint32_t)(v_ri51 + v_rj));
    v_rl73 = ((uint32_t)(v_ri73 + v_rj));
    v_rk1 += ((uint32_t)(v_ri71 + v_rl51));
    v_rk3 += ((uint32_t)(v_ri53 + v_rl73));
    v_rk5 += ((uint32_t)(v_ri53 + v_rl51));
    v_rk7 += ((uint32_t)(v_ri71 + v_rl73));
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 + v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[7u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 - v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[1u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 + v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[6u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 - v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[2u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 + v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[5u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 - v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[3u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 + v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[4u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 - v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  }
  if (0u == (v_intermediate[49u] |
      v_intermediate[50u] |
      v_intermediate[51u] |
      v_intermediate[52u] |
      v_intermediate[53u] |
      v_intermediate[54u] |
      v_intermediate[55u])) {
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(v_intermediate[48u] + 16u)) >> 5u) & 1023u)];
    a_dst_buffer.ptr[1u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[2u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[3u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[4u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[5u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[6u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[7u] = a_dst_buffer.ptr[0u];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  } else {
    v_in2 = v_intermediate[50u];
    v_in6 = v_intermediate[54u];
    v_ra = ((uint32_t)(((uint32_t)(v_in2 + v_in6)) * 4433u));
    v_rb2 = ((uint32_t)(v_ra + ((uint32_t)(v_in2 * 6270u))));
    v_rb6 = ((uint32_t)(v_ra - ((uint32_t)(v_in6 * 15137u))));
    v_in0 = v_intermediate[48u];
    v_in4 = v_intermediate[52u];
    v_rcp = ((uint32_t)(((uint32_t)(v_in0 + v_in4)) << 13u));
    v_rcm = ((uint32_t)(((uint32_t)(v_in0 - v_in4)) << 13u));
    v_rd0 = ((uint32_t)(v_rcp + v_rb2));
    v_rd1 = ((uint32_t)(v_rcm + v_rb6));
    v_rd2 = ((uint32_t)(v_rcm - v_rb6));
    v_rd3 = ((uint32_t)(v_rcp - v_rb2));
    v_in1 = v_intermediate[49u];
    v_in3 = v_intermediate[51u];
    v_in5 = v_intermediate[53u];
    v_in7 = v_intermediate[55u];
    v_ri51 = ((uint32_t)(v_in5 + v_in1));
    v_ri53 = ((uint32_t)(v_in5 + v_in3));
    v_ri71 = ((uint32_t)(v_in7 + v_in1));
    v_ri73 = ((uint32_t)(v_in7 + v_in3));
    v_rj = ((uint32_t)(((uint32_t)(v_ri73 + v_ri51)) * 9633u));
    v_rk1 = ((uint32_t)(v_in1 * 12299u));
    v_rk3 = ((uint32_t)(v_in3 * 25172u));
    v_rk5 = ((uint32_t)(v_in5 * 16819u));
    v_rk7 = ((uint32_t)(v_in7 * 2446u));
    v_ri51 *= 4294964100u;
    v_ri53 *= 4294946301u;
    v_ri71 *= 4294959923u;
    v_ri73 *= 4294951227u;
    v_rl51 = ((uint32_t)(v_ri51 + v_rj));
    v_rl73 = ((uint32_t)(v_ri73 + v_rj));
    v_rk1 += ((uint32_t)(v_ri71 + v_rl51));
    v_rk3 += ((uint32_t)(v_ri53 + v_rl73));
    v_rk5 += ((uint32_t)(v_ri53 + v_rl51));
    v_rk7 += ((uint32_t)(v_ri71 + v_rl73));
    if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 + v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[7u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 - v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[1u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 + v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[6u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 - v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[2u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 + v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[5u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 - v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[3u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 + v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[4u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 - v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  }
  if (0u == (v_intermediate[57u] |
      v_intermediate[58u] |
      v_intermediate[59u] |
      v_intermediate[60u] |
      v_intermediate[61u] |
      v_intermediate[62u] |
      v_intermediate[63u])) {
    if (8u > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(v_intermediate[56u] + 16u)) >> 5u) & 1023u)];
    a_dst_buffer.ptr[1u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[2u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[3u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[4u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[5u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[6u] = a_dst_buffer.ptr[0u];
    a_dst_buffer.ptr[7u] = a_dst_buffer.ptr[0u];
  } else {
    v_in2 = v_intermediate[58u];
    v_in6 = v_intermediate[62u];
    v_ra = ((uint32_t)(((uint32_t)(v_in2 + v_in6)) * 4433u));
    v_rb2 = ((uint32_t)(v_ra + ((uint32_t)(v_in2 * 6270u))));
    v_rb6 = ((uint32_t)(v_ra - ((uint32_t)(v_in6 * 15137u))));
    v_in0 = v_intermediate[56u];
    v_in4 = v_intermediate[60u];
    v_rcp = ((uint32_t)(((uint32_t)(v_in0 + v_in4)) << 13u));
    v_rcm = ((uint32_t)(((uint32_t)(v_in0 - v_in4)) << 13u));
    v_rd0 = ((uint32_t)(v_rcp + v_rb2));
    v_rd1 = ((uint32_t)(v_rcm + v_rb6));
    v_rd2 = ((uint32_t)(v_rcm - v_rb6));
    v_rd3 = ((uint32_t)(v_rcp - v_rb2));
    v_in1 = v_intermediate[57u];
    v_in3 = v_intermediate[59u];
    v_in5 = v_intermediate[61u];
    v_in7 = v_intermediate[63u];
    v_ri51 = ((uint32_t)(v_in5 + v_in1));
    v_ri53 = ((uint32_t)(v_in5 + v_in3));
    v_ri71 = ((uint32_t)(v_in7 + v_in1));
    v_ri73 = ((uint32_t)(v_in7 + v_in3));
    v_rj = ((uint32_t)(((uint32_t)(v_ri73 + v_ri51)) * 9633u));
    v_rk1 = ((uint32_t)(v_in1 * 12299u));
    v_rk3 = ((uint32_t)(v_in3 * 25172u));
    v_rk5 = ((uint32_t)(v_in5 * 16819u));
    v_rk7 = ((uint32_t)(v_in7 * 2446u));
    v_ri51 *= 4294964100u;
    v_ri53 *= 4294946301u;
    v_ri71 *= 4294959923u;
    v_ri73 *= 4294951227u;
    v_rl51 = ((uint32_t)(v_ri51 + v_rj));
    v_rl73 = ((uint32_t)(v_ri73 + v_rj));
    v_rk1 += ((uint32_t)(v_ri71 + v_rl51));
    v_rk3 += ((uint32_t)(v_ri53 + v_rl73));
    v_rk5 += ((uint32_t)(v_ri53 + v_rl51));
    v_rk7 += ((uint32_t)(v_ri71 + v_rl73));
    if (8u > ((uint64_t)(a_dst_buffer.len))) {
      return wuffs_base__make_empty_struct();
    }
    a_dst_buffer.ptr[0u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 + v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[7u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd0 - v_rk1)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[1u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 + v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[6u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd1 - v_rk3)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[2u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 + v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[5u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd2 - v_rk5)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[3u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 + v_rk7)) + 131072u)) >> 18u) & 1023u)];
    a_dst_buffer.ptr[4u] = WUFFS_JPEG__BIAS_AND_CLAMP[((((uint32_t)(((uint32_t)(v_rd3 - v_rk7)) + 131072u)) >> 18u) & 1023u)];
  }
  return wuffs_base__make_empty_struct();
}

// ‼ WUFFS MULTI-FILE SECTION +x86_avx2
// -------- func jpeg.decoder.decode_idct_x86_avx2

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2,avx2")
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__decode_idct_x86_avx2(
    wuffs_jpeg__decoder* self,
    wuffs_base__slice_u8 a_dst_buffer,
    uint64_t a_dst_stride,
    uint32_t a_q) {
  __m256i v_k_0000 = {0};
  __m256i v_k_8080 = {0};
  __m256i v_k_0000_0002 = {0};
  __m256i v_k_0001_FFFF = {0};
  __m256i v_k_0400_0000 = {0};
  __m256i v_k_29CF_1151_D630_1151 = {0};
  __m256i v_k_E333_133E_ADFD_1051 = {0};
  __m256i v_k_E6DC_25A1_1925_25A1 = {0};
  __m256i v_k_ECC1_E333_EFB0_ADFD = {0};
  __m128i v_az_coeffs = {0};
  __m256i v_az_ah00 = {0};
  __m256i v_az_ad00 = {0};
  __m256i v_az_eh00 = {0};
  __m256i v_az_adeh = {0};
  __m256i v_rows01 = {0};
  __m256i v_rows23 = {0};
  __m256i v_rows45 = {0};
  __m256i v_rows67 = {0};
  __m256i v_quants01 = {0};
  __m256i v_quants23 = {0};
  __m256i v_quants45 = {0};
  __m256i v_quants67 = {0};
  __m256i v_rows04 = {0};
  __m256i v_rows31 = {0};
  __m256i v_rows26 = {0};
  __m256i v_rows75 = {0};
  __m256i v_fp_rows62 = {0};
  __m256i v_fp_bq2662ad = {0};
  __m256i v_fp_bq2662eh = {0};
  __m256i v_fp_cb26ad = {0};
  __m256i v_fp_cb26eh = {0};
  __m256i v_fp_rows40pos = {0};
  __m256i v_fp_rows04neg = {0};
  __m256i v_fp_rows0pm4 = {0};
  __m256i v_fp_ccpmad = {0};
  __m256i v_fp_ccpmeh = {0};
  __m256i v_fp_cd01ad = {0};
  __m256i v_fp_cd01eh = {0};
  __m256i v_fp_cd32ad = {0};
  __m256i v_fp_cd32eh = {0};
  __m256i v_fp_sums7351 = {0};
  __m256i v_fp_sums5173 = {0};
  __m256i v_fp_ci73515173ad = {0};
  __m256i v_fp_ci73515173eh = {0};
  __m256i v_fp_cl7351ad = {0};
  __m256i v_fp_cl7351eh = {0};
  __m256i v_fp_rows13 = {0};
  __m256i v_fp_bq7153ad = {0};
  __m256i v_fp_bq7153eh = {0};
  __m256i v_fp_ck75ad = {0};
  __m256i v_fp_ck75eh = {0};
  __m256i v_fp_cl5173ad = {0};
  __m256i v_fp_cl5173eh = {0};
  __m256i v_fp_ck13ad = {0};
  __m256i v_fp_ck13eh = {0};
  __m256i v_intermediate01ad = {0};
  __m256i v_intermediate01eh = {0};
  __m256i v_intermediate01 = {0};
  __m256i v_intermediate32ad = {0};
  __m256i v_intermediate32eh = {0};
  __m256i v_intermediate32 = {0};
  __m256i v_intermediate45ad = {0};
  __m256i v_intermediate45eh = {0};
  __m256i v_intermediate45 = {0};
  __m256i v_intermediate76ad = {0};
  __m256i v_intermediate76eh = {0};
  __m256i v_intermediate76 = {0};
  __m256i v_ita0a1e0e1 = {0};
  __m256i v_ita2a3e2e3 = {0};
  __m256i v_ita4a5e4e5 = {0};
  __m256i v_ita6a7e6e7 = {0};
  __m256i v_ita0c0e0g0 = {0};
  __m256i v_ita1c1e1g1 = {0};
  __m256i v_ita4c4e4g4 = {0};
  __m256i v_ita5c5e5g5 = {0};
  __m256i v_ita0b0e0f0 = {0};
  __m256i v_ita4b4e4f4 = {0};
  __m256i v_itc0d0g0h0 = {0};
  __m256i v_itc4d4g4h4 = {0};
  __m256i v_intermediateae = {0};
  __m256i v_intermediatebf = {0};
  __m256i v_intermediatecg = {0};
  __m256i v_intermediatedh = {0};
  __m256i v_intermediatedb = {0};
  __m256i v_intermediatehf = {0};
  __m256i v_sp_cols62 = {0};
  __m256i v_sp_bq2662ad = {0};
  __m256i v_sp_bq2662eh = {0};
  __m256i v_sp_rb26ad = {0};
  __m256i v_sp_rb26eh = {0};
  __m256i v_sp_cols40pos = {0};
  __m256i v_sp_cols04neg = {0};
  __m256i v_sp_cols0pm4 = {0};
  __m256i v_sp_rcpmad = {0};
  __m256i v_sp_rcpmeh = {0};
  __m256i v_sp_rd01ad = {0};
  __m256i v_sp_rd01eh = {0};
  __m256i v_sp_rd32ad = {0};
  __m256i v_sp_rd32eh = {0};
  __m256i v_sp_sums7351 = {0};
  __m256i v_sp_sums5173 = {0};
  __m256i v_sp_ri73515173ad = {0};
  __m256i v_sp_ri73515173eh = {0};
  __m256i v_sp_rl7351ad = {0};
  __m256i v_sp_rl7351eh = {0};
  __m256i v_sp_cols13 = {0};
  __m256i v_sp_bq7153ad = {0};
  __m256i v_sp_bq7153eh = {0};
  __m256i v_sp_rk75ad = {0};
  __m256i v_sp_rk75eh = {0};
  __m256i v_sp_rl5173ad = {0};
  __m256i v_sp_rl5173eh = {0};
  __m256i v_sp_rk13ad = {0};
  __m256i v_sp_rk13eh = {0};
  __m256i v_final01ad = {0};
  __m256i v_final01eh = {0};
  __m256i v_final01 = {0};
  __m256i v_final32ad = {0};
  __m256i v_final32eh = {0};
  __m256i v_final32 = {0};
  __m256i v_final45ad = {0};
  __m256i v_final45eh = {0};
  __m256i v_final45 = {0};
  __m256i v_final76ad = {0};
  __m256i v_final76eh = {0};
  __m256i v_final76 = {0};
  __m256i v_fta0a1e0e1 = {0};
  __m256i v_fta2a3e2e3 = {0};
  __m256i v_fta4a5e4e5 = {0};
  __m256i v_fta6a7e6e7 = {0};
  __m256i v_fta0c0e0g0 = {0};
  __m256i v_fta1c1e1g1 = {0};
  __m256i v_fta4c4e4g4 = {0};
  __m256i v_fta5c5e5g5 = {0};
  __m256i v_fta0b0e0f0 = {0};
  __m256i v_ftc0d0g0h0 = {0};
  __m256i v_fta4b4e4f4 = {0};
  __m256i v_ftc4d4g4h4 = {0};
  __m256i v_finalae = {0};
  __m256i v_finalbf = {0};
  __m256i v_finalcg = {0};
  __m256i v_finaldh = {0};
  __m256i v_final0145 = {0};
  __m256i v_final2367 = {0};
  uint64_t v_final0 = 0;
  uint64_t v_final1 = 0;
  uint64_t v_final2 = 0;
  uint64_t v_final3 = 0;
  uint64_t v_final4 = 0;
  uint64_t v_final5 = 0;
  uint64_t v_final6 = 0;
  uint64_t v_final7 = 0;
  wuffs_base__slice_u8 v_remaining = {0};

  if (8u > a_dst_stride) {
    return wuffs_base__make_empty_struct();
  }
  v_k_0000 = _mm256_set_epi16((int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u), (int16_t)(0u));
  v_k_8080 = _mm256_set_epi16((int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u), (int16_t)(32896u));
  v_k_0000_0002 = _mm256_set_epi16((int16_t)(2u), (int16_t)(0u), (int16_t)(2u), (int16_t)(0u), (int16_t)(2u), (int16_t)(0u), (int16_t)(2u), (int16_t)(0u), (int16_t)(2u), (int16_t)(0u), (int16_t)(2u), (int16_t)(0u), (int16_t)(2u), (int16_t)(0u), (int16_t)(2u), (int16_t)(0u));
  v_k_0001_FFFF = _mm256_set_epi16((int16_t)(65535u), (int16_t)(65535u), (int16_t)(65535u), (int16_t)(65535u), (int16_t)(65535u), (int16_t)(65535u), (int16_t)(65535u), (int16_t)(65535u), (int16_t)(1u), (int16_t)(1u), (int16_t)(1u), (int16_t)(1u), (int16_t)(1u), (int16_t)(1u), (int16_t)(1u), (int16_t)(1u));
  v_k_0400_0000 = _mm256_set_epi16((int16_t)(0u), (int16_t)(1024u), (int16_t)(0u), (int16_t)(1024u), (int16_t)(0u), (int16_t)(1024u), (int16_t)(0u), (int16_t)(1024u), (int16_t)(0u), (int16_t)(1024u), (int16_t)(0u), (int16_t)(1024u), (int16_t)(0u), (int16_t)(1024u), (int16_t)(0u), (int16_t)(1024u));
  v_k_29CF_1151_D630_1151 = _mm256_set_epi16((int16_t)(4433u), (int16_t)(54832u), (int16_t)(4433u), (int16_t)(54832u), (int16_t)(4433u), (int16_t)(54832u), (int16_t)(4433u), (int16_t)(54832u), (int16_t)(4433u), (int16_t)(10703u), (int16_t)(4433u), (int16_t)(10703u), (int16_t)(4433u), (int16_t)(10703u), (int16_t)(4433u), (int16_t)(10703u));
  v_k_E333_133E_ADFD_1051 = _mm256_set_epi16((int16_t)(4177u), (int16_t)(44541u), (int16_t)(4177u), (int16_t)(44541u), (int16_t)(4177u), (int16_t)(44541u), (int16_t)(4177u), (int16_t)(44541u), (int16_t)(4926u), (int16_t)(58163u), (int16_t)(4926u), (int16_t)(58163u), (int16_t)(4926u), (int16_t)(58163u), (int16_t)(4926u), (int16_t)(58163u));
  v_k_E6DC_25A1_1925_25A1 = _mm256_set_epi16((int16_t)(9633u), (int16_t)(6437u), (int16_t)(9633u), (int16_t)(6437u), (int16_t)(9633u), (int16_t)(6437u), (int16_t)(9633u), (int16_t)(6437u), (int16_t)(9633u), (int16_t)(59100u), (int16_t)(9633u), (int16_t)(59100u), (int16_t)(9633u), (int16_t)(59100u), (int16_t)(9633u), (int16_t)(59100u));
  v_k_ECC1_E333_EFB0_ADFD = _mm256_set_epi16((int16_t)(44541u), (int16_t)(61360u), (int16_t)(44541u), (int16_t)(61360u), (int16_t)(44541u), (int16_t)(61360u), (int16_t)(44541u), (int16_t)(61360u), (int16_t)(58163u), (int16_t)(60609u), (int16_t)(58163u), (int16_t)(60609u), (int16_t)(58163u), (int16_t)(60609u), (int16_t)(58163u), (int16_t)(60609u));
  do {
    if (0u == (wuffs_base__peek_u64le__no_bounds_check((const uint8_t*)(const void*)(self->private_data.f_mcu_blocks[0u] + 8u)) | wuffs_base__peek_u64le__no_bounds_check((const uint8_t*)(const void*)(self->private_data.f_mcu_blocks[0u] + 16u)))) {
      v_az_coeffs = _mm_or_si128(_mm_or_si128(_mm_or_si128(_mm_or_si128(_mm_or_si128(_mm_or_si128(_mm_lddqu_si128((const __m128i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 8u)), _mm_lddqu_si128((const __m128i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 16u))), _mm_lddqu_si128((const __m128i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 24u))), _mm_lddqu_si128((const __m128i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 32u))), _mm_lddqu_si128((const __m128i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 40u))), _mm_lddqu_si128((const __m128i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 48u))), _mm_lddqu_si128((const __m128i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 56u)));
      if (0u == ((uint64_t)(_mm_cvtsi128_si64(_mm_packs_epi16(v_az_coeffs, v_az_coeffs))))) {
        v_rows01 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 0u));
        v_quants01 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_impl.f_quant_tables[a_q] + 0u));
        v_rows01 = _mm256_mullo_epi16(v_rows01, v_quants01);
        v_az_ah00 = _mm256_slli_epi16(v_rows01, (int32_t)(2u));
        v_az_ad00 = _mm256_unpacklo_epi16(v_az_ah00, v_az_ah00);
        v_az_eh00 = _mm256_unpackhi_epi16(v_az_ah00, v_az_ah00);
        v_az_adeh = _mm256_inserti128_si256(v_az_ad00, _mm256_castsi256_si128(v_az_eh00), (int32_t)(1u));
        v_intermediateae = _mm256_shuffle_epi32(v_az_adeh, (int32_t)(0u));
        v_intermediatebf = _mm256_shuffle_epi32(v_az_adeh, (int32_t)(85u));
        v_intermediatecg = _mm256_shuffle_epi32(v_az_adeh, (int32_t)(170u));
        v_intermediatedh = _mm256_shuffle_epi32(v_az_adeh, (int32_t)(255u));
        break;
      }
    }
    v_rows01 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 0u));
    v_rows23 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 16u));
    v_rows45 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 32u));
    v_rows67 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_data.f_mcu_blocks[0u] + 48u));
    v_quants01 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_impl.f_quant_tables[a_q] + 0u));
    v_quants23 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_impl.f_quant_tables[a_q] + 16u));
    v_quants45 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_impl.f_quant_tables[a_q] + 32u));
    v_quants67 = _mm256_lddqu_si256((const __m256i*)(const void*)(self->private_impl.f_quant_tables[a_q] + 48u));
    v_rows01 = _mm256_mullo_epi16(v_rows01, v_quants01);
    v_rows23 = _mm256_mullo_epi16(v_rows23, v_quants23);
    v_rows45 = _mm256_mullo_epi16(v_rows45, v_quants45);
    v_rows67 = _mm256_mullo_epi16(v_rows67, v_quants67);
    v_rows04 = _mm256_permute2x128_si256(v_rows01, v_rows45, (int32_t)(32u));
    v_rows31 = _mm256_permute2x128_si256(v_rows23, v_rows01, (int32_t)(49u));
    v_rows26 = _mm256_permute2x128_si256(v_rows23, v_rows67, (int32_t)(32u));
    v_rows75 = _mm256_permute2x128_si256(v_rows67, v_rows45, (int32_t)(49u));
    v_fp_rows62 = _mm256_permute2x128_si256(v_rows26, v_rows26, (int32_t)(1u));
    v_fp_bq2662ad = _mm256_unpacklo_epi16(v_rows26, v_fp_rows62);
    v_fp_bq2662eh = _mm256_unpackhi_epi16(v_rows26, v_fp_rows62);
    v_fp_cb26ad = _mm256_madd_epi16(v_fp_bq2662ad, v_k_29CF_1151_D630_1151);
    v_fp_cb26eh = _mm256_madd_epi16(v_fp_bq2662eh, v_k_29CF_1151_D630_1151);
    v_fp_rows40pos = _mm256_permute2x128_si256(v_rows04, v_rows04, (int32_t)(1u));
    v_fp_rows04neg = _mm256_sign_epi16(v_rows04, v_k_0001_FFFF);
    v_fp_rows0pm4 = _mm256_add_epi16(v_fp_rows40pos, v_fp_rows04neg);
    v_fp_ccpmad = _mm256_srai_epi32(_mm256_unpacklo_epi16(v_k_0000, v_fp_rows0pm4), (int32_t)(3u));
    v_fp_ccpmeh = _mm256_srai_epi32(_mm256_unpackhi_epi16(v_k_0000, v_fp_rows0pm4), (int32_t)(3u));
    v_fp_cd01ad = _mm256_add_epi32(v_fp_ccpmad, v_fp_cb26ad);
    v_fp_cd01eh = _mm256_add_epi32(v_fp_ccpmeh, v_fp_cb26eh);
    v_fp_cd32ad = _mm256_sub_epi32(v_fp_ccpmad, v_fp_cb26ad);
    v_fp_cd32eh = _mm256_sub_epi32(v_fp_ccpmeh, v_fp_cb26eh);
    v_fp_sums7351 = _mm256_add_epi16(v_rows75, v_rows31);
    v_fp_sums5173 = _mm256_permute2x128_si256(v_fp_sums7351, v_fp_sums7351, (int32_t)(1u));
    v_fp_ci73515173ad = _mm256_unpacklo_epi16(v_fp_sums7351, v_fp_sums5173);
    v_fp_ci73515173eh = _mm256_unpackhi_epi16(v_fp_sums7351, v_fp_sums5173);
    v_fp_cl7351ad = _mm256_madd_epi16(v_fp_ci73515173ad, v_k_E6DC_25A1_1925_25A1);
    v_fp_cl7351eh = _mm256_madd_epi16(v_fp_ci73515173eh, v_k_E6DC_25A1_1925_25A1);
    v_fp_rows13 = _mm256_permute2x128_si256(v_rows31, v_rows31, (int32_t)(1u));
    v_fp_bq7153ad = _mm256_unpacklo_epi16(v_rows75, v_fp_rows13);
    v_fp_bq7153eh = _mm256_unpackhi_epi16(v_rows75, v_fp_rows13);
    v_fp_ck75ad = _mm256_add_epi32(_mm256_madd_epi16(v_fp_bq7153ad, v_k_ECC1_E333_EFB0_ADFD), v_fp_cl7351ad);
    v_fp_ck75eh = _mm256_add_epi32(_mm256_madd_epi16(v_fp_bq7153eh, v_k_ECC1_E333_EFB0_ADFD), v_fp_cl7351eh);
    v_fp_cl5173ad = _mm256_permute2x128_si256(v_fp_cl7351ad, v_fp_cl7351ad, (int32_t)(1u));
    v_fp_cl5173eh = _mm256_permute2x128_si256(v_fp_cl7351eh, v_fp_cl7351eh, (int32_t)(1u));
    v_fp_ck13ad = _mm256_add_epi32(v_fp_cl5173ad, _mm256_madd_epi16(v_fp_bq7153ad, v_k_E333_133E_ADFD_1051));
    v_fp_ck13eh = _mm256_add_epi32(v_fp_cl5173eh, _mm256_madd_epi16(v_fp_bq7153eh, v_k_E333_133E_ADFD_1051));
    v_intermediate01ad = _mm256_srai_epi32(_mm256_add_epi32(_mm256_add_epi32(v_fp_cd01ad, v_fp_ck13ad), v_k_0400_0000), (int32_t)(11u));
    v_intermediate01eh = _mm256_srai_epi32(_mm256_add_epi32(_mm256_add_epi32(v_fp_cd01eh, v_fp_ck13eh), v_k_0400_0000), (int32_t)(11u));
    v_intermediate01 = _mm256_packs_epi32(v_intermediate01ad, v_intermediate01eh);
    v_intermediate32ad = _mm256_srai_epi32(_mm256_add_epi32(_mm256_add_epi32(v_fp_cd32ad, v_fp_ck75ad), v_k_0400_0000), (int32_t)(11u));
    v_intermediate32eh = _mm256_srai_epi32(_mm256_add_epi32(_mm256_add_epi32(v_fp_cd32eh, v_fp_ck75eh), v_k_0400_0000), (int32_t)(11u));
    v_intermediate32 = _mm256_packs_epi32(v_intermediate32ad, v_intermediate32eh);
    v_intermediate45ad = _mm256_srai_epi32(_mm256_add_epi32(_mm256_sub_epi32(v_fp_cd32ad, v_fp_ck75ad), v_k_0400_0000), (int32_t)(11u));
    v_intermediate45eh = _mm256_srai_epi32(_mm256_add_epi32(_mm256_sub_epi32(v_fp_cd32eh, v_fp_ck75eh), v_k_0400_0000), (int32_t)(11u));
    v_intermediate45 = _mm256_packs_epi32(v_intermediate45ad, v_intermediate45eh);
    v_intermediate76ad = _mm256_srai_epi32(_mm256_add_epi32(_mm256_sub_epi32(v_fp_cd01ad, v_fp_ck13ad), v_k_0400_0000), (int32_t)(11u));
    v_intermediate76eh = _mm256_srai_epi32(_mm256_add_epi32(_mm256_sub_epi32(v_fp_cd01eh, v_fp_ck13eh), v_k_0400_0000), (int32_t)(11u));
    v_intermediate76 = _mm256_packs_epi32(v_intermediate76ad, v_intermediate76eh);
    v_ita0a1e0e1 = _mm256_permute4x64_epi64(v_intermediate01, (int32_t)(216u));
    v_ita2a3e2e3 = _mm256_permute4x64_epi64(v_intermediate32, (int32_t)(114u));
    v_ita4a5e4e5 = _mm256_permute4x64_epi64(v_intermediate45, (int32_t)(216u));
    v_ita6a7e6e7 = _mm256_permute4x64_epi64(v_intermediate76, (int32_t)(114u));
    v_ita0c0e0g0 = _mm256_unpacklo_epi16(v_ita0a1e0e1, v_ita2a3e2e3);
    v_ita1c1e1g1 = _mm256_unpackhi_epi16(v_ita0a1e0e1, v_ita2a3e2e3);
    v_ita4c4e4g4 = _mm256_unpacklo_epi16(v_ita4a5e4e5, v_ita6a7e6e7);
    v_ita5c5e5g5 = _mm256_unpackhi_epi16(v_ita4a5e4e5, v_ita6a7e6e7);
    v_ita0b0e0f0 = _mm256_unpacklo_epi16(v_ita0c0e0g0, v_ita1c1e1g1);
    v_itc0d0g0h0 = _mm256_unpackhi_epi16(v_ita0c0e0g0, v_ita1c1e1g1);
    v_ita4b4e4f4 = _mm256_unpacklo_epi16(v_ita4c4e4g4, v_ita5c5e5g5);
    v_itc4d4g4h4 = _mm256_unpackhi_epi16(v_ita4c4e4g4, v_ita5c5e5g5);
    v_intermediateae = _mm256_unpacklo_epi64(v_ita0b0e0f0, v_ita4b4e4f4);
    v_intermediatebf = _mm256_unpackhi_epi64(v_ita0b0e0f0, v_ita4b4e4f4);
    v_intermediatecg = _mm256_unpacklo_epi64(v_itc0d0g0h0, v_itc4d4g4h4);
    v_intermediatedh = _mm256_unpackhi_epi64(v_itc0d0g0h0, v_itc4d4g4h4);
  } while (0);
  v_intermediatedb = _mm256_permute2x128_si256(v_intermediatedh, v_intermediatebf, (int32_t)(32u));
  v_intermediatehf = _mm256_permute2x128_si256(v_intermediatedh, v_intermediatebf, (int32_t)(49u));
  v_sp_cols62 = _mm256_permute2x128_si256(v_intermediatecg, v_intermediatecg, (int32_t)(1u));
  v_sp_bq2662ad = _mm256_unpacklo_epi16(v_intermediatecg, v_sp_cols62);
  v_sp_bq2662eh = _mm256_unpackhi_epi16(v_intermediatecg, v_sp_cols62);
  v_sp_rb26ad = _mm256_madd_epi16(v_sp_bq2662ad, v_k_29CF_1151_D630_1151);
  v_sp_rb26eh = _mm256_madd_epi16(v_sp_bq2662eh, v_k_29CF_1151_D630_1151);
  v_sp_cols40pos = _mm256_permute2x128_si256(v_intermediateae, v_intermediateae, (int32_t)(1u));
  v_sp_cols04neg = _mm256_sign_epi16(v_intermediateae, v_k_0001_FFFF);
  v_sp_cols0pm4 = _mm256_add_epi16(v_sp_cols40pos, v_sp_cols04neg);
  v_sp_rcpmad = _mm256_srai_epi32(_mm256_unpacklo_epi16(v_k_0000, v_sp_cols0pm4), (int32_t)(3u));
  v_sp_rcpmeh = _mm256_srai_epi32(_mm256_unpackhi_epi16(v_k_0000, v_sp_cols0pm4), (int32_t)(3u));
  v_sp_rd01ad = _mm256_add_epi32(v_sp_rcpmad, v_sp_rb26ad);
  v_sp_rd01eh = _mm256_add_epi32(v_sp_rcpmeh, v_sp_rb26eh);
  v_sp_rd32ad = _mm256_sub_epi32(v_sp_rcpmad, v_sp_rb26ad);
  v_sp_rd32eh = _mm256_sub_epi32(v_sp_rcpmeh, v_sp_rb26eh);
  v_sp_sums7351 = _mm256_add_epi16(v_intermediatehf, v_intermediatedb);
  v_sp_sums5173 = _mm256_permute2x128_si256(v_sp_sums7351, v_sp_sums7351, (int32_t)(1u));
  v_sp_ri73515173ad = _mm256_unpacklo_epi16(v_sp_sums7351, v_sp_sums5173);
  v_sp_ri73515173eh = _mm256_unpackhi_epi16(v_sp_sums7351, v_sp_sums5173);
  v_sp_rl7351ad = _mm256_madd_epi16(v_sp_ri73515173ad, v_k_E6DC_25A1_1925_25A1);
  v_sp_rl7351eh = _mm256_madd_epi16(v_sp_ri73515173eh, v_k_E6DC_25A1_1925_25A1);
  v_sp_cols13 = _mm256_permute2x128_si256(v_intermediatedb, v_intermediatedb, (int32_t)(1u));
  v_sp_bq7153ad = _mm256_unpacklo_epi16(v_intermediatehf, v_sp_cols13);
  v_sp_bq7153eh = _mm256_unpackhi_epi16(v_intermediatehf, v_sp_cols13);
  v_sp_rk75ad = _mm256_add_epi32(_mm256_madd_epi16(v_sp_bq7153ad, v_k_ECC1_E333_EFB0_ADFD), v_sp_rl7351ad);
  v_sp_rk75eh = _mm256_add_epi32(_mm256_madd_epi16(v_sp_bq7153eh, v_k_ECC1_E333_EFB0_ADFD), v_sp_rl7351eh);
  v_sp_rl5173ad = _mm256_permute2x128_si256(v_sp_rl7351ad, v_sp_rl7351ad, (int32_t)(1u));
  v_sp_rl5173eh = _mm256_permute2x128_si256(v_sp_rl7351eh, v_sp_rl7351eh, (int32_t)(1u));
  v_sp_rk13ad = _mm256_add_epi32(v_sp_rl5173ad, _mm256_madd_epi16(v_sp_bq7153ad, v_k_E333_133E_ADFD_1051));
  v_sp_rk13eh = _mm256_add_epi32(v_sp_rl5173eh, _mm256_madd_epi16(v_sp_bq7153eh, v_k_E333_133E_ADFD_1051));
  v_final01ad = _mm256_srai_epi32(_mm256_add_epi32(_mm256_add_epi32(v_sp_rd01ad, v_sp_rk13ad), v_k_0000_0002), (int32_t)(18u));
  v_final01eh = _mm256_srai_epi32(_mm256_add_epi32(_mm256_add_epi32(v_sp_rd01eh, v_sp_rk13eh), v_k_0000_0002), (int32_t)(18u));
  v_final01 = _mm256_packs_epi32(v_final01ad, v_final01eh);
  v_final32ad = _mm256_srai_epi32(_mm256_add_epi32(_mm256_add_epi32(v_sp_rd32ad, v_sp_rk75ad), v_k_0000_0002), (int32_t)(18u));
  v_final32eh = _mm256_srai_epi32(_mm256_add_epi32(_mm256_add_epi32(v_sp_rd32eh, v_sp_rk75eh), v_k_0000_0002), (int32_t)(18u));
  v_final32 = _mm256_packs_epi32(v_final32ad, v_final32eh);
  v_final45ad = _mm256_srai_epi32(_mm256_add_epi32(_mm256_sub_epi32(v_sp_rd32ad, v_sp_rk75ad), v_k_0000_0002), (int32_t)(18u));
  v_final45eh = _mm256_srai_epi32(_mm256_add_epi32(_mm256_sub_epi32(v_sp_rd32eh, v_sp_rk75eh), v_k_0000_0002), (int32_t)(18u));
  v_final45 = _mm256_packs_epi32(v_final45ad, v_final45eh);
  v_final76ad = _mm256_srai_epi32(_mm256_add_epi32(_mm256_sub_epi32(v_sp_rd01ad, v_sp_rk13ad), v_k_0000_0002), (int32_t)(18u));
  v_final76eh = _mm256_srai_epi32(_mm256_add_epi32(_mm256_sub_epi32(v_sp_rd01eh, v_sp_rk13eh), v_k_0000_0002), (int32_t)(18u));
  v_final76 = _mm256_packs_epi32(v_final76ad, v_final76eh);
  v_fta0a1e0e1 = _mm256_permute4x64_epi64(v_final01, (int32_t)(216u));
  v_fta2a3e2e3 = _mm256_permute4x64_epi64(v_final32, (int32_t)(114u));
  v_fta4a5e4e5 = _mm256_permute4x64_epi64(v_final45, (int32_t)(216u));
  v_fta6a7e6e7 = _mm256_permute4x64_epi64(v_final76, (int32_t)(114u));
  v_fta0c0e0g0 = _mm256_unpacklo_epi16(v_fta0a1e0e1, v_fta2a3e2e3);
  v_fta1c1e1g1 = _mm256_unpackhi_epi16(v_fta0a1e0e1, v_fta2a3e2e3);
  v_fta4c4e4g4 = _mm256_unpacklo_epi16(v_fta4a5e4e5, v_fta6a7e6e7);
  v_fta5c5e5g5 = _mm256_unpackhi_epi16(v_fta4a5e4e5, v_fta6a7e6e7);
  v_fta0b0e0f0 = _mm256_unpacklo_epi16(v_fta0c0e0g0, v_fta1c1e1g1);
  v_ftc0d0g0h0 = _mm256_unpackhi_epi16(v_fta0c0e0g0, v_fta1c1e1g1);
  v_fta4b4e4f4 = _mm256_unpacklo_epi16(v_fta4c4e4g4, v_fta5c5e5g5);
  v_ftc4d4g4h4 = _mm256_unpackhi_epi16(v_fta4c4e4g4, v_fta5c5e5g5);
  v_finalae = _mm256_unpacklo_epi64(v_fta0b0e0f0, v_fta4b4e4f4);
  v_finalbf = _mm256_unpackhi_epi64(v_fta0b0e0f0, v_fta4b4e4f4);
  v_finalcg = _mm256_unpacklo_epi64(v_ftc0d0g0h0, v_ftc4d4g4h4);
  v_finaldh = _mm256_unpackhi_epi64(v_ftc0d0g0h0, v_ftc4d4g4h4);
  v_final0145 = _mm256_add_epi8(_mm256_packs_epi16(v_finalae, v_finalbf), v_k_8080);
  v_final2367 = _mm256_add_epi8(_mm256_packs_epi16(v_finalcg, v_finaldh), v_k_8080);
  v_final0 = ((uint64_t)(_mm256_extract_epi64(v_final0145, (int32_t)(0u))));
  v_final1 = ((uint64_t)(_mm256_extract_epi64(v_final0145, (int32_t)(1u))));
  v_final2 = ((uint64_t)(_mm256_extract_epi64(v_final2367, (int32_t)(0u))));
  v_final3 = ((uint64_t)(_mm256_extract_epi64(v_final2367, (int32_t)(1u))));
  v_final4 = ((uint64_t)(_mm256_extract_epi64(v_final0145, (int32_t)(2u))));
  v_final5 = ((uint64_t)(_mm256_extract_epi64(v_final0145, (int32_t)(3u))));
  v_final6 = ((uint64_t)(_mm256_extract_epi64(v_final2367, (int32_t)(2u))));
  v_final7 = ((uint64_t)(_mm256_extract_epi64(v_final2367, (int32_t)(3u))));
  if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
    return wuffs_base__make_empty_struct();
  }
  v_remaining = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  wuffs_base__poke_u64le__no_bounds_check(a_dst_buffer.ptr, v_final0);
  a_dst_buffer = v_remaining;
  if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
    return wuffs_base__make_empty_struct();
  }
  v_remaining = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  wuffs_base__poke_u64le__no_bounds_check(a_dst_buffer.ptr, v_final1);
  a_dst_buffer = v_remaining;
  if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
    return wuffs_base__make_empty_struct();
  }
  v_remaining = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  wuffs_base__poke_u64le__no_bounds_check(a_dst_buffer.ptr, v_final2);
  a_dst_buffer = v_remaining;
  if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
    return wuffs_base__make_empty_struct();
  }
  v_remaining = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  wuffs_base__poke_u64le__no_bounds_check(a_dst_buffer.ptr, v_final3);
  a_dst_buffer = v_remaining;
  if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
    return wuffs_base__make_empty_struct();
  }
  v_remaining = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  wuffs_base__poke_u64le__no_bounds_check(a_dst_buffer.ptr, v_final4);
  a_dst_buffer = v_remaining;
  if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
    return wuffs_base__make_empty_struct();
  }
  v_remaining = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  wuffs_base__poke_u64le__no_bounds_check(a_dst_buffer.ptr, v_final5);
  a_dst_buffer = v_remaining;
  if (a_dst_stride > ((uint64_t)(a_dst_buffer.len))) {
    return wuffs_base__make_empty_struct();
  }
  v_remaining = wuffs_base__slice_u8__subslice_i(a_dst_buffer, a_dst_stride);
  wuffs_base__poke_u64le__no_bounds_check(a_dst_buffer.ptr, v_final6);
  a_dst_buffer = v_remaining;
  if (8u > ((uint64_t)(a_dst_buffer.len))) {
    return wuffs_base__make_empty_struct();
  }
  wuffs_base__poke_u64le__no_bounds_check(a_dst_buffer.ptr, v_final7);
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
// ‼ WUFFS MULTI-FILE SECTION -x86_avx2

// -------- func jpeg.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_jpeg__decoder__get_quirk(
    const wuffs_jpeg__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (a_key == 2u) {
    if (self->private_impl.f_use_lower_quality) {
      return 18446744073709551615u;
    }
  } else if (a_key == 1162824704u) {
    if (self->private_impl.f_reject_progressive_jpegs) {
      return 1u;
    }
  }
  return 0u;
}

// -------- func jpeg.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__set_quirk(
    wuffs_jpeg__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (a_key == 2u) {
    self->private_impl.f_use_lower_quality = (a_value >= 9223372036854775808u);
    return wuffs_base__make_status(NULL);
  } else if (a_key == 1162824704u) {
    self->private_impl.f_reject_progressive_jpegs = (a_value != 0u);
    return wuffs_base__make_status(NULL);
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func jpeg.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__decode_image_config(
    wuffs_jpeg__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_jpeg__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func jpeg.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__do_decode_image_config(
    wuffs_jpeg__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint8_t v_marker = 0;
  uint32_t v_pixfmt = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  if (coro_susp_point) {
    v_marker = self->private_data.s_do_decode_image_config.v_marker;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_c8 = t_0;
    }
    if (v_c8 != 255u) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_1 = *iop_a_src++;
      v_c8 = t_1;
    }
    if (v_c8 != 216u) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_header);
      goto exit;
    }
    while (true) {
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          v_c8 = t_2;
        }
        if (v_c8 == 255u) {
          break;
        }
      }
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_3 = *iop_a_src++;
          v_c8 = t_3;
        }
        if (v_c8 != 255u) {
          v_marker = v_c8;
          break;
        }
      }
      if (v_marker == 0u) {
        continue;
      } else if ((208u <= v_marker) && (v_marker <= 217u)) {
        if (v_marker <= 215u) {
          continue;
        }
      } else {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
          uint32_t t_4;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
            t_4 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
            iop_a_src += 2;
          } else {
            self->private_data.s_do_decode_image_config.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
              uint32_t num_bits_4 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_4);
              if (num_bits_4 == 8) {
                t_4 = ((uint32_t)(*scratch >> 48));
                break;
              }
              num_bits_4 += 8u;
              *scratch |= ((uint64_t)(num_bits_4));
            }
          }
          self->private_impl.f_payload_length = t_4;
        }
        if (self->private_impl.f_payload_length < 2u) {
          if ((v_marker == 254u) || ((224u <= v_marker) && (v_marker < 240u))) {
            continue;
          }
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_marker);
          goto exit;
        }
        self->private_impl.f_payload_length -= 2u;
      }
      if (v_marker < 192u) {
        status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_marker);
        goto exit;
      } else if (v_marker < 208u) {
        if (v_marker <= 194u) {
          if ((v_marker == 194u) && self->private_impl.f_reject_progressive_jpegs) {
            status = wuffs_base__make_status(wuffs_jpeg__error__rejected_progressive_jpeg);
            goto exit;
          } else if (self->private_impl.f_sof_marker != 0u) {
            status = wuffs_base__make_status(wuffs_jpeg__error__bad_sof_marker);
            goto exit;
          } else if (v_marker == 192u) {
            if (self->private_impl.f_seen_dht[2u] ||
                self->private_impl.f_seen_dht[3u] ||
                self->private_impl.f_seen_dht[6u] ||
                self->private_impl.f_seen_dht[7u]) {
              status = wuffs_base__make_status(wuffs_jpeg__error__bad_sof_marker);
              goto exit;
            }
          }
          self->private_impl.f_sof_marker = v_marker;
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          status = wuffs_jpeg__decoder__decode_sof(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          break;
        } else if (v_marker == 195u) {
          status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_lossless_coding);
          goto exit;
        } else if (v_marker == 196u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
          status = wuffs_jpeg__decoder__decode_dht(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          continue;
        } else if ((197u <= v_marker) && (v_marker <= 199u)) {
          status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_hierarchical_coding);
          goto exit;
        } else if (v_marker == 200u) {
          status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_marker);
          goto exit;
        } else {
          status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_arithmetic_coding);
          goto exit;
        }
      } else if (v_marker < 224u) {
        if (v_marker < 218u) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_marker);
          goto exit;
        } else if (v_marker == 218u) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
          goto exit;
        } else if (v_marker == 219u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
          status = wuffs_jpeg__decoder__decode_dqt(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          continue;
        } else if (v_marker == 221u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
          status = wuffs_jpeg__decoder__decode_dri(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          continue;
        } else {
          status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_marker);
          goto exit;
        }
      } else if (v_marker < 240u) {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
        status = wuffs_jpeg__decoder__decode_appn(self, a_src, v_marker);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
        continue;
      } else {
        if (v_marker == 254u) {
        } else {
          status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_marker);
          goto exit;
        }
      }
      self->private_data.s_do_decode_image_config.scratch = self->private_impl.f_payload_length;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
      if (self->private_data.s_do_decode_image_config.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_do_decode_image_config.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_do_decode_image_config.scratch;
      self->private_impl.f_payload_length = 0u;
    }
    self->private_impl.choosy_decode_idct = (
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V3)
        wuffs_base__cpu_arch__have_x86_avx2() ? &wuffs_jpeg__decoder__decode_idct_x86_avx2 :
#endif
        self->private_impl.choosy_decode_idct);
    self->private_impl.f_frame_config_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
    if (a_dst != NULL) {
      v_pixfmt = 536870920u;
      if (self->private_impl.f_num_components > 1u) {
        v_pixfmt = 2415954056u;
      }
      wuffs_base__image_config__set(
          a_dst,
          v_pixfmt,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          self->private_impl.f_frame_config_io_position,
          true);
    }
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_image_config.v_marker = v_marker;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.decode_dqt

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_dqt(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint8_t v_q = 0;
  uint32_t v_i = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_dqt;
  if (coro_susp_point) {
    v_q = self->private_data.s_decode_dqt.v_q;
    v_i = self->private_data.s_decode_dqt.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (self->private_impl.f_payload_length > 0u) {
      self->private_impl.f_payload_length -= 1u;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      if (((uint8_t)(v_c8 & 15u)) > 3u) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_dqt_marker);
        goto exit;
      }
      v_q = ((uint8_t)(v_c8 & 15u));
      if (((uint8_t)(v_c8 >> 4u)) == 1u) {
        status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_precision);
        goto exit;
      } else if ((((uint8_t)(v_c8 >> 4u)) > 1u) || (self->private_impl.f_payload_length < 64u)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_dqt_marker);
        goto exit;
      }
      self->private_impl.f_payload_length -= 64u;
      v_i = 0u;
      while (v_i < 64u) {
        v_i += 1u;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint16_t t_1 = *iop_a_src++;
          self->private_impl.f_quant_tables[v_q][WUFFS_JPEG__UNZIG[v_i]] = t_1;
        }
      }
      self->private_impl.f_seen_dqt[v_q] = true;
      if (self->private_impl.f_sof_marker == 0u) {
        v_i = 0u;
        while (v_i < 64u) {
          self->private_impl.f_saved_quant_tables[v_q][v_i] = self->private_impl.f_quant_tables[v_q][v_i];
          v_i += 1u;
        }
        self->private_impl.f_saved_seen_dqt[v_q] = true;
      }
    }

    goto ok;
    ok:
    self->private_impl.p_decode_dqt = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_dqt = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_dqt.v_q = v_q;
  self->private_data.s_decode_dqt.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.decode_dri

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_dri(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_dri;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_payload_length != 2u) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_dri_marker);
      goto exit;
    }
    self->private_impl.f_payload_length = 0u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint16_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_0 = wuffs_base__peek_u16be__no_bounds_check(iop_a_src);
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_dri.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_dri.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
          if (num_bits_0 == 8) {
            t_0 = ((uint16_t)(*scratch >> 48));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0));
        }
      }
      self->private_impl.f_restart_interval = t_0;
    }
    if (self->private_impl.f_sof_marker == 0u) {
      self->private_impl.f_saved_restart_interval = self->private_impl.f_restart_interval;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_dri = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_dri = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.decode_appn

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_appn(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint8_t a_marker) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_c32 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_appn;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    do {
      if (a_marker == 224u) {
        if (self->private_impl.f_payload_length >= 5u) {
          self->private_impl.f_payload_length -= 5u;
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
            uint32_t t_0;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_0 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_decode_appn.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_decode_appn.scratch;
                uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
                if (num_bits_0 == 24) {
                  t_0 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_0 += 8u;
                *scratch |= ((uint64_t)(num_bits_0)) << 56;
              }
            }
            v_c32 = t_0;
          }
          if (v_c32 != 1179207242u) {
            self->private_impl.f_payload_length = (65535u & (self->private_impl.f_payload_length + 1u));
            break;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_1 = *iop_a_src++;
            v_c8 = t_1;
          }
          self->private_impl.f_is_jfif = (v_c8 == 0u);
        }
      } else if (a_marker == 238u) {
        if (self->private_impl.f_payload_length >= 12u) {
          self->private_impl.f_payload_length -= 12u;
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
            uint32_t t_2;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_2 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_decode_appn.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_decode_appn.scratch;
                uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
                if (num_bits_2 == 24) {
                  t_2 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_2 += 8u;
                *scratch |= ((uint64_t)(num_bits_2)) << 56;
              }
            }
            v_c32 = t_2;
          }
          if (v_c32 != 1651467329u) {
            self->private_impl.f_payload_length = (65535u & (self->private_impl.f_payload_length + 8u));
            break;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
            uint32_t t_3;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_3 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_decode_appn.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_decode_appn.scratch;
                uint32_t num_bits_3 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_3;
                if (num_bits_3 == 24) {
                  t_3 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_3 += 8u;
                *scratch |= ((uint64_t)(num_bits_3)) << 56;
              }
            }
            v_c32 = t_3;
          }
          if ((255u & v_c32) != 101u) {
            self->private_impl.f_payload_length = (65535u & (self->private_impl.f_payload_length + 4u));
            break;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
            uint32_t t_4;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_4 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_decode_appn.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_decode_appn.scratch;
                uint32_t num_bits_4 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4;
                if (num_bits_4 == 24) {
                  t_4 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_4 += 8u;
                *scratch |= ((uint64_t)(num_bits_4)) << 56;
              }
            }
            v_c32 = t_4;
          }
          if ((v_c32 >> 24u) == 0u) {
            self->private_impl.f_is_adobe = 1u;
          } else {
            self->private_impl.f_is_adobe = 2u;
          }
        }
      }
    } while (0);
    self->private_data.s_decode_appn.scratch = self->private_impl.f_payload_length;
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
    if (self->private_data.s_decode_appn.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
      self->private_data.s_decode_appn.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
      iop_a_src = io2_a_src;
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      goto suspend;
    }
    iop_a_src += self->private_data.s_decode_appn.scratch;
    self->private_impl.f_payload_length = 0u;

    goto ok;
    ok:
    self->private_impl.p_decode_appn = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_appn = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.decode_sof

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_sof(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint8_t v_comp_h = 0;
  uint8_t v_comp_v = 0;
  uint32_t v_i = 0;
  uint32_t v_j = 0;
  bool v_has_h24 = false;
  bool v_has_h3 = false;
  bool v_has_v24 = false;
  bool v_has_v3 = false;
  uint32_t v_upper_bound = 0;
  uint64_t v_wh0 = 0;
  uint64_t v_wh1 = 0;
  uint64_t v_wh2 = 0;
  uint64_t v_wh3 = 0;
  uint64_t v_progressive = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_sof;
  if (coro_susp_point) {
    v_i = self->private_data.s_decode_sof.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_payload_length < 6u) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_sof_marker);
      goto exit;
    }
    self->private_impl.f_payload_length -= 6u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_c8 = t_0;
    }
    if (v_c8 == 8u) {
    } else if (v_c8 == 12u) {
      status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_precision_12_bits);
      goto exit;
    } else if (v_c8 == 16u) {
      status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_precision_16_bits);
      goto exit;
    } else {
      status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_precision);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_1 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_sof.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_sof.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
          if (num_bits_1 == 8) {
            t_1 = ((uint32_t)(*scratch >> 48));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1));
        }
      }
      self->private_impl.f_height = t_1;
    }
    if (self->private_impl.f_height == 0u) {
      status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_implicit_height);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      uint32_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_2 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_sof.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_sof.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_2);
          if (num_bits_2 == 8) {
            t_2 = ((uint32_t)(*scratch >> 48));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2));
        }
      }
      self->private_impl.f_width = t_2;
    }
    if (self->private_impl.f_width == 0u) {
      status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_3 = *iop_a_src++;
      v_c8 = t_3;
    }
    if ((v_c8 == 0u) || (v_c8 > 4u)) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_sof_marker);
      goto exit;
    } else if (v_c8 == 2u) {
      status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_color_model);
      goto exit;
    }
    self->private_impl.f_num_components = ((uint32_t)(v_c8));
    if (self->private_impl.f_payload_length != (3u * self->private_impl.f_num_components)) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_sof_marker);
      goto exit;
    }
    self->private_impl.f_payload_length = 0u;
    v_i = 0u;
    while (v_i < self->private_impl.f_num_components) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_4 = *iop_a_src++;
        self->private_impl.f_components_c[v_i] = t_4;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_5 = *iop_a_src++;
        v_c8 = t_5;
      }
      v_comp_h = ((uint8_t)(v_c8 >> 4u));
      v_comp_v = ((uint8_t)(v_c8 & 15u));
      if ((v_comp_h == 0u) ||
          (v_comp_h > 4u) ||
          (v_comp_v == 0u) ||
          (v_comp_v > 4u)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_sof_marker);
        goto exit;
      }
      self->private_impl.f_components_h[v_i] = v_comp_h;
      if (self->private_impl.f_max_incl_components_h < self->private_impl.f_components_h[v_i]) {
        self->private_impl.f_max_incl_components_h = self->private_impl.f_components_h[v_i];
      }
      self->private_impl.f_components_v[v_i] = v_comp_v;
      if (self->private_impl.f_max_incl_components_v < self->private_impl.f_components_v[v_i]) {
        self->private_impl.f_max_incl_components_v = self->private_impl.f_components_v[v_i];
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_6 = *iop_a_src++;
        v_c8 = t_6;
      }
      if (v_c8 >= 4u) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_sof_marker);
        goto exit;
      }
      self->private_impl.f_components_tq[v_i] = v_c8;
      v_j = 0u;
      while (v_j < v_i) {
        if (self->private_impl.f_components_c[v_j] == self->private_impl.f_components_c[v_i]) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_sof_marker);
          goto exit;
        }
        v_j += 1u;
      }
      v_i += 1u;
    }
    if (self->private_impl.f_num_components == 1u) {
      self->private_impl.f_max_incl_components_h = 1u;
      self->private_impl.f_max_incl_components_v = 1u;
      self->private_impl.f_components_h[0u] = 1u;
      self->private_impl.f_components_v[0u] = 1u;
    } else {
      v_has_h24 = false;
      v_has_h3 = false;
      v_has_v24 = false;
      v_has_v3 = false;
      v_i = 0u;
      while (v_i < self->private_impl.f_num_components) {
        v_has_h24 = (v_has_h24 || (self->private_impl.f_components_h[v_i] == 2u) || (self->private_impl.f_components_h[v_i] == 4u));
        v_has_h3 = (v_has_h3 || (self->private_impl.f_components_h[v_i] == 3u));
        v_has_v24 = (v_has_v24 || (self->private_impl.f_components_v[v_i] == 2u) || (self->private_impl.f_components_v[v_i] == 4u));
        v_has_v3 = (v_has_v3 || (self->private_impl.f_components_v[v_i] == 3u));
        v_i += 1u;
      }
      if ((v_has_h24 && v_has_h3) || (v_has_v24 && v_has_v3)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_fractional_sampling);
        goto exit;
      }
      if (self->private_impl.f_num_components == 4u) {
        self->private_impl.f_is_rgb_or_cmyk = (self->private_impl.f_is_adobe < 2u);
      } else {
        if (self->private_impl.f_is_jfif) {
          self->private_impl.f_is_rgb_or_cmyk = false;
        } else if (self->private_impl.f_is_adobe > 0u) {
          self->private_impl.f_is_rgb_or_cmyk = (self->private_impl.f_is_adobe == 1u);
        } else {
          self->private_impl.f_is_rgb_or_cmyk = ((self->private_impl.f_components_c[0u] == 82u) && (self->private_impl.f_components_c[1u] == 71u) && (self->private_impl.f_components_c[2u] == 66u));
        }
      }
    }
    self->private_impl.f_width_in_mcus = wuffs_jpeg__decoder__quantize_dimension(self, self->private_impl.f_width, 1u, self->private_impl.f_max_incl_components_h);
    self->private_impl.f_height_in_mcus = wuffs_jpeg__decoder__quantize_dimension(self, self->private_impl.f_height, 1u, self->private_impl.f_max_incl_components_v);
    v_upper_bound = 65544u;
    self->private_impl.f_components_workbuf_widths[0u] = wuffs_base__u32__min(v_upper_bound, (8u * self->private_impl.f_width_in_mcus * ((uint32_t)(self->private_impl.f_components_h[0u]))));
    self->private_impl.f_components_workbuf_widths[1u] = wuffs_base__u32__min(v_upper_bound, (8u * self->private_impl.f_width_in_mcus * ((uint32_t)(self->private_impl.f_components_h[1u]))));
    self->private_impl.f_components_workbuf_widths[2u] = wuffs_base__u32__min(v_upper_bound, (8u * self->private_impl.f_width_in_mcus * ((uint32_t)(self->private_impl.f_components_h[2u]))));
    self->private_impl.f_components_workbuf_widths[3u] = wuffs_base__u32__min(v_upper_bound, (8u * self->private_impl.f_width_in_mcus * ((uint32_t)(self->private_impl.f_components_h[3u]))));
    self->private_impl.f_components_workbuf_heights[0u] = wuffs_base__u32__min(v_upper_bound, (8u * self->private_impl.f_height_in_mcus * ((uint32_t)(self->private_impl.f_components_v[0u]))));
    self->private_impl.f_components_workbuf_heights[1u] = wuffs_base__u32__min(v_upper_bound, (8u * self->private_impl.f_height_in_mcus * ((uint32_t)(self->private_impl.f_components_v[1u]))));
    self->private_impl.f_components_workbuf_heights[2u] = wuffs_base__u32__min(v_upper_bound, (8u * self->private_impl.f_height_in_mcus * ((uint32_t)(self->private_impl.f_components_v[2u]))));
    self->private_impl.f_components_workbuf_heights[3u] = wuffs_base__u32__min(v_upper_bound, (8u * self->private_impl.f_height_in_mcus * ((uint32_t)(self->private_impl.f_components_v[3u]))));
    v_wh0 = (((uint64_t)(self->private_impl.f_components_workbuf_widths[0u])) * ((uint64_t)(self->private_impl.f_components_workbuf_heights[0u])));
    v_wh1 = (((uint64_t)(self->private_impl.f_components_workbuf_widths[1u])) * ((uint64_t)(self->private_impl.f_components_workbuf_heights[1u])));
    v_wh2 = (((uint64_t)(self->private_impl.f_components_workbuf_widths[2u])) * ((uint64_t)(self->private_impl.f_components_workbuf_heights[2u])));
    v_wh3 = (((uint64_t)(self->private_impl.f_components_workbuf_widths[3u])) * ((uint64_t)(self->private_impl.f_components_workbuf_heights[3u])));
    v_progressive = 0u;
    if (self->private_impl.f_sof_marker >= 194u) {
      v_progressive = 2u;
      v_i = 0u;
      while (v_i < 4u) {
        v_j = 0u;
        while (v_j < 10u) {
          self->private_impl.f_block_smoothing_lowest_scan_al[v_i][v_j] = 16u;
          v_j += 1u;
        }
        v_i += 1u;
      }
    }
    self->private_impl.f_components_workbuf_offsets[0u] = 0u;
    self->private_impl.f_components_workbuf_offsets[1u] = (self->private_impl.f_components_workbuf_offsets[0u] + v_wh0);
    self->private_impl.f_components_workbuf_offsets[2u] = (self->private_impl.f_components_workbuf_offsets[1u] + v_wh1);
    self->private_impl.f_components_workbuf_offsets[3u] = (self->private_impl.f_components_workbuf_offsets[2u] + v_wh2);
    self->private_impl.f_components_workbuf_offsets[4u] = (self->private_impl.f_components_workbuf_offsets[3u] + v_wh3);
    self->private_impl.f_components_workbuf_offsets[5u] = (self->private_impl.f_components_workbuf_offsets[4u] + (v_wh0 * v_progressive));
    self->private_impl.f_components_workbuf_offsets[6u] = (self->private_impl.f_components_workbuf_offsets[5u] + (v_wh1 * v_progressive));
    self->private_impl.f_components_workbuf_offsets[7u] = (self->private_impl.f_components_workbuf_offsets[6u] + (v_wh2 * v_progressive));
    self->private_impl.f_components_workbuf_offsets[8u] = (self->private_impl.f_components_workbuf_offsets[7u] + (v_wh3 * v_progressive));

    goto ok;
    ok:
    self->private_impl.p_decode_sof = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_sof = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_sof.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.quantize_dimension

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__quantize_dimension(
    const wuffs_jpeg__decoder* self,
    uint32_t a_width,
    uint8_t a_h,
    uint8_t a_max_incl_h) {
  uint32_t v_ratio = 0;

  v_ratio = 0u;
  if (a_h > 0u) {
    v_ratio = ((uint32_t)(((uint8_t)(a_max_incl_h / a_h))));
  }
  if (v_ratio == 1u) {
    return ((a_width + 7u) / 8u);
  } else if (v_ratio == 2u) {
    return ((a_width + 15u) / 16u);
  } else if (v_ratio == 3u) {
    return ((a_width + 23u) / 24u);
  }
  return ((a_width + 31u) / 32u);
}

// -------- func jpeg.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__decode_frame_config(
    wuffs_jpeg__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_jpeg__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func jpeg.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__do_decode_frame_config(
    wuffs_jpeg__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_jpeg__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (self->private_impl.f_frame_config_io_position != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          self->private_impl.f_frame_config_io_position,
          0u,
          true,
          false,
          4278190080u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__decode_frame(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_ddf_status = wuffs_base__make_status(NULL);
  wuffs_base__status v_swizzle_status = wuffs_base__make_status(NULL);
  uint32_t v_scan_count = 0;

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      v_scan_count = self->private_impl.f_scan_count;
      {
        wuffs_base__status t_0 = wuffs_jpeg__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_ddf_status = t_0;
      }
      if ((v_ddf_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        v_ddf_status = wuffs_base__make_status(wuffs_jpeg__error__truncated_input);
      }
      if ( ! self->private_impl.f_swizzle_immediately && (wuffs_base__status__is_error(&v_ddf_status) || (v_scan_count < self->private_impl.f_scan_count))) {
        if (self->private_impl.f_sof_marker >= 194u) {
          wuffs_jpeg__decoder__apply_progressive_idct(self, a_workbuf);
        }
        if (self->private_impl.f_num_components == 1u) {
          v_swizzle_status = wuffs_jpeg__decoder__swizzle_gray(self,
              a_dst,
              a_workbuf,
              0u,
              4294967295u,
              0u,
              4294967295u,
              ((uint64_t)(self->private_impl.f_components_workbuf_widths[0u])));
        } else {
          v_swizzle_status = wuffs_jpeg__decoder__swizzle_colorful(self,
              a_dst,
              a_workbuf,
              0u,
              4294967295u,
              0u,
              4294967295u);
        }
        if (wuffs_base__status__is_error(&v_ddf_status)) {
          status = v_ddf_status;
          goto exit;
        } else if (wuffs_base__status__is_error(&v_swizzle_status)) {
          status = v_swizzle_status;
          goto exit;
        }
      }
      status = v_ddf_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func jpeg.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__do_decode_frame(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_pixfmt = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint8_t v_c8 = 0;
  uint8_t v_marker = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  if (coro_susp_point) {
    v_marker = self->private_data.s_do_decode_frame.v_marker;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_jpeg__decoder__do_decode_frame_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    v_pixfmt = 536870920u;
    if (self->private_impl.f_num_components > 1u) {
      v_pixfmt = 2415954056u;
    }
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024)),
        wuffs_base__utility__make_pixel_format(v_pixfmt),
        wuffs_base__utility__empty_slice_u8(),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    self->private_impl.f_swizzle_immediately = false;
    if (self->private_impl.f_components_workbuf_offsets[8u] > ((uint64_t)(a_workbuf.len))) {
      if ((self->private_impl.f_sof_marker >= 194u) ||  ! self->private_impl.f_use_lower_quality) {
        status = wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
        goto exit;
      }
      self->private_impl.f_swizzle_immediately = true;
      self->private_impl.f_swizzle_immediately_status = wuffs_base__make_status(NULL);
    } else if (self->private_impl.f_components_workbuf_offsets[4u] < self->private_impl.f_components_workbuf_offsets[8u]) {
      wuffs_private_impl__bulk_memset(a_workbuf.ptr + self->private_impl.f_components_workbuf_offsets[4u], (self->private_impl.f_components_workbuf_offsets[8u] - self->private_impl.f_components_workbuf_offsets[4u]), 0u);
    }
    if (self->private_impl.f_components_workbuf_offsets[4u] <= ((uint64_t)(a_workbuf.len))) {
      wuffs_private_impl__bulk_memset(a_workbuf.ptr, self->private_impl.f_components_workbuf_offsets[4u], 128u);
    }
    while (true) {
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_0 = *iop_a_src++;
          v_c8 = t_0;
        }
        if (v_c8 == 255u) {
          break;
        }
      }
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
        if (v_c8 != 255u) {
          v_marker = v_c8;
          break;
        }
      }
      if (v_marker == 0u) {
        continue;
      } else if ((208u <= v_marker) && (v_marker <= 217u)) {
        if (v_marker <= 215u) {
          continue;
        }
      } else {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          uint32_t t_2;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
            t_2 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
            iop_a_src += 2;
          } else {
            self->private_data.s_do_decode_frame.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_decode_frame.scratch;
              uint32_t num_bits_2 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_2);
              if (num_bits_2 == 8) {
                t_2 = ((uint32_t)(*scratch >> 48));
                break;
              }
              num_bits_2 += 8u;
              *scratch |= ((uint64_t)(num_bits_2));
            }
          }
          self->private_impl.f_payload_length = t_2;
        }
        if (self->private_impl.f_payload_length < 2u) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_marker);
          goto exit;
        }
        self->private_impl.f_payload_length -= 2u;
      }
      if (v_marker < 192u) {
        status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_marker);
        goto exit;
      } else if (v_marker < 208u) {
        if (v_marker == 196u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
          status = wuffs_jpeg__decoder__decode_dht(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          continue;
        } else if (v_marker == 200u) {
          status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_marker);
          goto exit;
        }
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_sof_marker);
        goto exit;
      } else if (v_marker < 224u) {
        if (v_marker < 217u) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_marker);
          goto exit;
        } else if (v_marker == 217u) {
          break;
        } else if (v_marker == 218u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          status = wuffs_jpeg__decoder__decode_sos(self, a_dst, a_src, a_workbuf);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          continue;
        } else if (v_marker == 219u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
          status = wuffs_jpeg__decoder__decode_dqt(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          continue;
        } else if (v_marker == 221u) {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
          status = wuffs_jpeg__decoder__decode_dri(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          continue;
        } else {
          status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_marker);
          goto exit;
        }
      } else if (v_marker < 240u) {
      } else {
        if (v_marker == 254u) {
        } else {
          status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_marker);
          goto exit;
        }
      }
      self->private_data.s_do_decode_frame.scratch = self->private_impl.f_payload_length;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
      if (self->private_data.s_do_decode_frame.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_do_decode_frame.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_do_decode_frame.scratch;
      self->private_impl.f_payload_length = 0u;
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_frame.v_marker = v_marker;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.decode_dht

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_dht(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint8_t v_tc = 0;
  uint8_t v_th = 0;
  uint8_t v_tc4_th = 0;
  uint32_t v_working_total_count = 0;
  uint32_t v_total_count = 0;
  uint32_t v_i = 0;
  bool v_failed = false;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_dht;
  if (coro_susp_point) {
    v_tc4_th = self->private_data.s_decode_dht.v_tc4_th;
    v_total_count = self->private_data.s_decode_dht.v_total_count;
    v_i = self->private_data.s_decode_dht.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (self->private_impl.f_payload_length > 0u) {
      if (self->private_impl.f_payload_length < 17u) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_dht_marker);
        goto exit;
      }
      self->private_impl.f_payload_length -= 17u;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      if ((((uint8_t)(v_c8 >> 4u)) > 1u) || (((uint8_t)(v_c8 & 15u)) > 3u)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_dht_marker);
        goto exit;
      }
      v_tc = ((uint8_t)(v_c8 >> 4u));
      v_th = ((uint8_t)(v_c8 & 15u));
      v_tc4_th = ((uint8_t)(((uint8_t)(((uint8_t)(v_tc * 4u)) | v_th))));
      if ((self->private_impl.f_sof_marker == 192u) && (((uint8_t)(v_tc4_th & 3u)) > 1u)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_dht_marker);
        goto exit;
      }
      v_i = 0u;
      while (v_i < 16u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          self->private_data.f_dht_temp_counts[v_i] = t_1;
        }
        v_i += 1u;
      }
      v_working_total_count = 0u;
      v_i = 0u;
      while (v_i < 16u) {
        v_working_total_count = ((v_working_total_count + ((uint32_t)(self->private_data.f_dht_temp_counts[v_i]))) & 65535u);
        v_i += 1u;
      }
      if ((v_working_total_count <= 0u) || (256u < v_working_total_count)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_dht_marker);
        goto exit;
      }
      v_total_count = v_working_total_count;
      if (self->private_impl.f_payload_length < v_total_count) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_dht_marker);
        goto exit;
      }
      self->private_impl.f_payload_length -= v_total_count;
      v_i = 0u;
      while (v_i < v_total_count) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          self->private_impl.f_huff_tables_symbols[v_tc4_th][v_i] = t_2;
        }
        v_i += 1u;
      }
      while (v_i < 256u) {
        self->private_impl.f_huff_tables_symbols[v_tc4_th][v_i] = 0u;
        v_i += 1u;
      }
      if (((uint8_t)(v_tc4_th & 4u)) == 0u) {
        v_i = 0u;
        while (v_i < v_total_count) {
          if (self->private_impl.f_huff_tables_symbols[v_tc4_th][v_i] > 15u) {
            status = wuffs_base__make_status(wuffs_jpeg__error__bad_dht_marker);
            goto exit;
          }
          v_i += 1u;
        }
      }
      v_failed = wuffs_jpeg__decoder__calculate_huff_tables(self, v_tc4_th, v_total_count);
      if (v_failed) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_dht_marker);
        goto exit;
      }
      self->private_impl.f_seen_dht[v_tc4_th] = true;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_dht = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_dht = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_dht.v_tc4_th = v_tc4_th;
  self->private_data.s_decode_dht.v_total_count = v_total_count;
  self->private_data.s_decode_dht.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.calculate_huff_tables

WUFFS_BASE__GENERATED_C_CODE
static bool
wuffs_jpeg__decoder__calculate_huff_tables(
    wuffs_jpeg__decoder* self,
    uint8_t a_tc4_th,
    uint32_t a_total_count) {
  uint32_t v_i = 0;
  uint8_t v_j = 0;
  uint8_t v_k = 0;
  uint32_t v_bit_length_minus_one = 0;
  uint8_t v_bit_length = 0;
  uint32_t v_bit_string = 0;
  uint32_t v_slow = 0;
  uint8_t v_prefix = 0;
  uint16_t v_fast = 0;
  uint32_t v_reps = 0;

  v_i = 0u;
  v_k = 0u;
  v_bit_length_minus_one = 0u;
  while (v_i < a_total_count) {
    while (v_k >= self->private_data.f_dht_temp_counts[v_bit_length_minus_one]) {
      v_k = 0u;
      v_bit_length_minus_one = ((v_bit_length_minus_one + 1u) & 15u);
    }
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
    v_k += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    self->private_data.f_dht_temp_bit_lengths[v_i] = ((uint8_t)((v_bit_length_minus_one + 1u)));
    v_i += 1u;
  }
  v_bit_length = 0u;
  v_bit_string = 0u;
  v_i = 0u;
  while (v_i < a_total_count) {
    while (v_bit_length < self->private_data.f_dht_temp_bit_lengths[v_i]) {
      if (v_bit_length >= 16u) {
        return true;
      }
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
      v_bit_length += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      v_bit_string <<= 1u;
    }
    self->private_data.f_dht_temp_bit_strings[v_i] = ((uint16_t)(v_bit_string));
    v_bit_string += 1u;
    if ((v_bit_string >> v_bit_length) > 0u) {
      return true;
    }
    v_i += 1u;
  }
  v_k = 0u;
  v_bit_length_minus_one = 0u;
  while (true) {
    if (self->private_data.f_dht_temp_counts[v_bit_length_minus_one] == 0u) {
      self->private_impl.f_huff_tables_slow[a_tc4_th][v_bit_length_minus_one] = 0u;
    } else {
      v_slow = (255u & ((uint32_t)(((uint32_t)(v_k)) - ((uint32_t)(self->private_data.f_dht_temp_bit_strings[v_k])))));
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
      v_k += self->private_data.f_dht_temp_counts[v_bit_length_minus_one];
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      self->private_impl.f_huff_tables_slow[a_tc4_th][v_bit_length_minus_one] = (v_slow | ((((uint32_t)(self->private_data.f_dht_temp_bit_strings[((uint8_t)(v_k - 1u))])) + 1u) << 8u));
    }
    v_bit_length_minus_one = ((v_bit_length_minus_one + 1u) & 15u);
    if (v_bit_length_minus_one == 0u) {
      break;
    }
  }
  v_i = 0u;
  while (v_i < 256u) {
    self->private_impl.f_huff_tables_fast[a_tc4_th][v_i] = 65535u;
    v_i += 1u;
  }
  v_j = 0u;
  v_bit_length_minus_one = 0u;
  while (v_bit_length_minus_one < 8u) {
    v_k = 0u;
    while (v_k < self->private_data.f_dht_temp_counts[v_bit_length_minus_one]) {
      v_prefix = ((uint8_t)((((uint32_t)(self->private_data.f_dht_temp_bit_strings[v_j])) << (7u - v_bit_length_minus_one))));
      v_fast = ((uint16_t)(((((uint32_t)((v_bit_length_minus_one + 1u))) << 8u) | ((uint32_t)(self->private_impl.f_huff_tables_symbols[a_tc4_th][v_j])))));
      v_reps = (((uint32_t)(1u)) << (7u - v_bit_length_minus_one));
      while (v_reps > 0u) {
        self->private_impl.f_huff_tables_fast[a_tc4_th][v_prefix] = v_fast;
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_prefix += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        v_reps -= 1u;
      }
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
      v_k += 1u;
      v_j += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    }
    v_bit_length_minus_one += 1u;
  }
  return false;
}

// -------- func jpeg.decoder.decode_sos

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__decode_sos(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_my = 0;
  uint32_t v_mx = 0;
  uint32_t v_decode_mcu_result = 0;
  uint32_t v_bitstream_length = 0;

  uint32_t coro_susp_point = self->private_impl.p_decode_sos;
  if (coro_susp_point) {
    v_my = self->private_data.s_decode_sos.v_my;
    v_mx = self->private_data.s_decode_sos.v_mx;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_scan_count >= 32u) {
      status = wuffs_base__make_status(wuffs_jpeg__error__unsupported_scan_count);
      goto exit;
    } else if ((self->private_impl.f_scan_count > 0u) &&  ! self->private_impl.f_expect_multiple_scans) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_scan_count);
      goto exit;
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
    status = wuffs_jpeg__decoder__prepare_scan(self, a_src);
    if (status.repr) {
      goto suspend;
    }
    self->private_impl.f_next_restart_marker = 0u;
    self->private_impl.f_mcu_previous_dc_values[0u] = 0u;
    self->private_impl.f_mcu_previous_dc_values[1u] = 0u;
    self->private_impl.f_mcu_previous_dc_values[2u] = 0u;
    self->private_impl.f_mcu_previous_dc_values[3u] = 0u;
    self->private_impl.f_restarts_remaining = self->private_impl.f_restart_interval;
    self->private_impl.f_eob_run = 0u;
    self->private_impl.f_bitstream_bits = 0u;
    self->private_impl.f_bitstream_n_bits = 0u;
    self->private_impl.f_bitstream_ri = 0u;
    self->private_impl.f_bitstream_wi = 0u;
    self->private_impl.f_bitstream_padding = 12345u;
    wuffs_jpeg__decoder__fill_bitstream(self, a_src);
    v_my = 0u;
    while (v_my < self->private_impl.f_scan_height_in_mcus) {
      v_mx = 0u;
      while (v_mx < self->private_impl.f_scan_width_in_mcus) {
        self->private_impl.f_mcu_current_block = 0u;
        self->private_impl.f_mcu_zig_index = ((uint32_t)(self->private_impl.f_scan_ss));
        if (self->private_impl.f_sof_marker >= 194u) {
          wuffs_jpeg__decoder__load_mcu_blocks(self, v_mx, v_my, a_workbuf);
        }
        while (true) {
          v_decode_mcu_result = wuffs_jpeg__decoder__decode_mcu(self,
              a_dst,
              a_workbuf,
              v_mx,
              v_my);
          if (v_decode_mcu_result == 0u) {
            break;
          } else if (v_decode_mcu_result == 1u) {
          } else if (v_decode_mcu_result == 2u) {
            status = wuffs_base__make_status(wuffs_jpeg__error__internal_error_inconsistent_decoder_state);
            goto exit;
          } else {
            status = self->private_impl.f_swizzle_immediately_status;
            if (wuffs_base__status__is_error(&status)) {
              goto exit;
            } else if (wuffs_base__status__is_suspension(&status)) {
              status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
              goto exit;
            }
            goto ok;
          }
          while (true) {
            v_bitstream_length = ((uint32_t)(self->private_impl.f_bitstream_wi - self->private_impl.f_bitstream_ri));
            wuffs_jpeg__decoder__fill_bitstream(self, a_src);
            if (v_bitstream_length < ((uint32_t)(self->private_impl.f_bitstream_wi - self->private_impl.f_bitstream_ri))) {
              break;
            } else if (self->private_impl.f_bitstream_padding == 0u) {
              status = wuffs_base__make_status(wuffs_jpeg__error__short_sos_bitstream);
              goto exit;
            } else if ((a_src && a_src->meta.closed) &&  ! self->private_impl.f_bitstream_is_closed) {
              if (self->private_impl.f_bitstream_wi < 1024u) {
                wuffs_private_impl__bulk_memset(&self->private_data.f_bitstream_buffer[self->private_impl.f_bitstream_wi], 264u, 0u);
                self->private_impl.f_bitstream_wi += 264u;
                self->private_impl.f_bitstream_is_closed = true;
              }
              break;
            }
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
          }
        }
        if (self->private_impl.f_sof_marker >= 194u) {
          wuffs_jpeg__decoder__save_mcu_blocks(self, v_mx, v_my, a_workbuf);
        }
        if (self->private_impl.f_restarts_remaining > 0u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          self->private_impl.f_restarts_remaining -= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
          if (self->private_impl.f_restarts_remaining == 0u) {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
            status = wuffs_jpeg__decoder__skip_past_the_next_restart_marker(self, a_src);
            if (status.repr) {
              goto suspend;
            }
            self->private_impl.f_mcu_previous_dc_values[0u] = 0u;
            self->private_impl.f_mcu_previous_dc_values[1u] = 0u;
            self->private_impl.f_mcu_previous_dc_values[2u] = 0u;
            self->private_impl.f_mcu_previous_dc_values[3u] = 0u;
            self->private_impl.f_restarts_remaining = self->private_impl.f_restart_interval;
            self->private_impl.f_eob_run = 0u;
            self->private_impl.f_bitstream_bits = 0u;
            self->private_impl.f_bitstream_n_bits = 0u;
            self->private_impl.f_bitstream_ri = 0u;
            self->private_impl.f_bitstream_wi = 0u;
            self->private_impl.f_bitstream_padding = 12345u;
          }
        }
        v_mx += 1u;
      }
      v_my += 1u;
    }
    wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_scan_count, 1u);

    ok:
    self->private_impl.p_decode_sos = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_sos = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_sos.v_my = v_my;
  self->private_data.s_decode_sos.v_mx = v_mx;

  goto exit;
  exit:
  return status;
}

// -------- func jpeg.decoder.prepare_scan

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__prepare_scan(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_i = 0;
  uint32_t v_j = 0;
  uint32_t v_j_max_incl = 0;
  bool v_failed = false;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_prepare_scan;
  if (coro_susp_point) {
    v_i = self->private_data.s_prepare_scan.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if ((self->private_impl.f_payload_length < 6u) || (self->private_impl.f_payload_length > 12u)) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_c8 = t_0;
    }
    if ((v_c8 < 1u) || (v_c8 > 4u)) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
      goto exit;
    }
    self->private_impl.f_scan_num_components = ((uint32_t)(v_c8));
    if ((self->private_impl.f_scan_num_components > self->private_impl.f_num_components) || (self->private_impl.f_payload_length != (4u + (2u * self->private_impl.f_scan_num_components)))) {
      status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
      goto exit;
    }
    self->private_impl.f_payload_length = 0u;
    v_i = 0u;
    while (v_i < self->private_impl.f_scan_num_components) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_1 = *iop_a_src++;
        v_c8 = t_1;
      }
      v_j = 0u;
      while (true) {
        if (v_j >= self->private_impl.f_num_components) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
          goto exit;
        }
        if (v_c8 == self->private_impl.f_components_c[v_j]) {
          if ( ! self->private_impl.f_seen_dqt[self->private_impl.f_components_tq[v_j]]) {
            status = wuffs_base__make_status(wuffs_jpeg__error__missing_quantization_table);
            goto exit;
          }
          self->private_impl.f_scan_comps_cselector[v_i] = ((uint8_t)(v_j));
          break;
        }
        v_j += 1u;
      }
      v_j = 0u;
      while (v_j < v_i) {
        if (self->private_impl.f_scan_comps_cselector[v_i] == self->private_impl.f_scan_comps_cselector[v_j]) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
          goto exit;
        }
        v_j += 1u;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_2 = *iop_a_src++;
        v_c8 = t_2;
      }
      if ((((uint8_t)(v_c8 >> 4u)) > 3u) || (((uint8_t)(v_c8 & 15u)) > 3u)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
        goto exit;
      }
      self->private_impl.f_scan_comps_td[v_i] = ((uint8_t)(v_c8 >> 4u));
      self->private_impl.f_scan_comps_ta[v_i] = ((uint8_t)(v_c8 & 15u));
      if (self->private_impl.f_sof_marker == 192u) {
        if ((self->private_impl.f_scan_comps_td[v_i] > 1u) || (self->private_impl.f_scan_comps_ta[v_i] > 1u)) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
          goto exit;
        }
      }
      v_i += 1u;
    }
    if (self->private_impl.f_scan_count == 0u) {
      self->private_impl.f_expect_multiple_scans = ((self->private_impl.f_sof_marker >= 194u) || (self->private_impl.f_scan_num_components < self->private_impl.f_num_components));
    }
    if (self->private_impl.f_sof_marker < 194u) {
      self->private_data.s_prepare_scan.scratch = 3u;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      if (self->private_data.s_prepare_scan.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_prepare_scan.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_prepare_scan.scratch;
      self->private_impl.f_scan_ss = 0u;
      self->private_impl.f_scan_se = 63u;
      self->private_impl.f_scan_ah = 0u;
      self->private_impl.f_scan_al = 0u;
    } else {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_3 = *iop_a_src++;
        v_c8 = t_3;
      }
      if (v_c8 > 63u) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
        goto exit;
      }
      self->private_impl.f_scan_ss = v_c8;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_4 = *iop_a_src++;
        v_c8 = t_4;
      }
      if ((v_c8 > 63u) || (v_c8 < self->private_impl.f_scan_ss)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
        goto exit;
      }
      self->private_impl.f_scan_se = v_c8;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_5 = *iop_a_src++;
        v_c8 = t_5;
      }
      if ((((uint8_t)(v_c8 >> 4u)) > 14u) || (((uint8_t)(v_c8 & 15u)) > 13u)) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
        goto exit;
      }
      self->private_impl.f_scan_ah = ((uint8_t)(v_c8 >> 4u));
      self->private_impl.f_scan_al = ((uint8_t)(v_c8 & 15u));
      if (self->private_impl.f_scan_ah > 0u) {
        if (((uint8_t)(self->private_impl.f_scan_ah - 1u)) != self->private_impl.f_scan_al) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
          goto exit;
        }
      }
      if (self->private_impl.f_scan_ss == 0u) {
        if (self->private_impl.f_scan_se != 0u) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
          goto exit;
        } else if (self->private_impl.f_scan_ah == 0u) {
          self->private_impl.choosy_decode_mcu = (
              &wuffs_jpeg__decoder__decode_mcu_progressive_dc_high_bits);
        } else {
          self->private_impl.choosy_decode_mcu = (
              &wuffs_jpeg__decoder__decode_mcu_progressive_dc_low_bit);
        }
      } else {
        if (self->private_impl.f_scan_num_components != 1u) {
          status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
          goto exit;
        } else if (self->private_impl.f_scan_ah == 0u) {
          self->private_impl.choosy_decode_mcu = (
              &wuffs_jpeg__decoder__decode_mcu_progressive_ac_high_bits);
        } else {
          self->private_impl.choosy_decode_mcu = (
              &wuffs_jpeg__decoder__decode_mcu_progressive_ac_low_bit);
        }
      }
    }
    v_i = 0u;
    while (v_i < self->private_impl.f_scan_num_components) {
      if ((self->private_impl.f_scan_ss == 0u) &&  ! self->private_impl.f_seen_dht[((uint8_t)(0u | self->private_impl.f_scan_comps_td[v_i]))]) {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
        status = wuffs_jpeg__decoder__use_default_huffman_table(self, ((uint8_t)(0u | self->private_impl.f_scan_comps_td[v_i])));
        if (status.repr) {
          goto suspend;
        }
      }
      if ((self->private_impl.f_scan_se != 0u) &&  ! self->private_impl.f_seen_dht[((uint8_t)(4u | self->private_impl.f_scan_comps_ta[v_i]))]) {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
        status = wuffs_jpeg__decoder__use_default_huffman_table(self, ((uint8_t)(4u | self->private_impl.f_scan_comps_ta[v_i])));
        if (status.repr) {
          goto suspend;
        }
      }
      v_j = ((uint32_t)(self->private_impl.f_scan_ss));
      v_j_max_incl = ((uint32_t)(wuffs_base__u8__min(self->private_impl.f_scan_se, 9u)));
      while (v_j <= v_j_max_incl) {
        self->private_impl.f_block_smoothing_lowest_scan_al[self->private_impl.f_scan_comps_cselector[v_i]][v_j] = self->private_impl.f_scan_al;
        v_j += 1u;
      }
      v_i += 1u;
    }
    if (self->private_impl.f_scan_num_components == 1u) {
      wuffs_jpeg__decoder__calculate_single_component_scan_fields(self);
    } else {
      v_failed = wuffs_jpeg__decoder__calculate_multiple_component_scan_fields(self);
      if (v_failed) {
        status = wuffs_base__make_status(wuffs_jpeg__error__bad_sos_marker);
        goto exit;
      }
    }

    goto ok;
    ok:
    self->private_impl.p_prepare_scan = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_prepare_scan = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_prepare_scan.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.use_default_huffman_table

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__use_default_huffman_table(
    wuffs_jpeg__decoder* self,
    uint8_t a_tc4_th) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__slice_u8 v_data = {0};
  wuffs_base__io_buffer u_r = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_r = &u_r;
  const uint8_t* iop_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io0_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  if (a_tc4_th == 0u) {
    v_data = wuffs_base__make_slice_u8(wuffs_base__strip_const_from_u8_ptr(WUFFS_JPEG__DEFAULT_HUFF_TABLE_DC_LUMA), 29);
  } else if (a_tc4_th == 1u) {
    v_data = wuffs_base__make_slice_u8(wuffs_base__strip_const_from_u8_ptr(WUFFS_JPEG__DEFAULT_HUFF_TABLE_DC_CHROMA), 29);
  } else if (a_tc4_th == 4u) {
    v_data = wuffs_base__make_slice_u8(wuffs_base__strip_const_from_u8_ptr(WUFFS_JPEG__DEFAULT_HUFF_TABLE_AC_LUMA), 179);
  } else if (a_tc4_th == 5u) {
    v_data = wuffs_base__make_slice_u8(wuffs_base__strip_const_from_u8_ptr(WUFFS_JPEG__DEFAULT_HUFF_TABLE_AC_CHROMA), 179);
  } else {
    status = wuffs_base__make_status(wuffs_jpeg__error__missing_huffman_table);
    goto exit;
  }
  {
    wuffs_base__io_buffer* o_0_v_r = v_r;
    const uint8_t* o_0_iop_v_r = iop_v_r;
    const uint8_t* o_0_io0_v_r = io0_v_r;
    const uint8_t* o_0_io1_v_r = io1_v_r;
    const uint8_t* o_0_io2_v_r = io2_v_r;
    v_r = wuffs_private_impl__io_reader__set(
        &u_r,
        &iop_v_r,
        &io0_v_r,
        &io1_v_r,
        &io2_v_r,
        v_data,
        0u);
    self->private_impl.f_payload_length = ((uint32_t)((((uint64_t)(v_data.len)) & 65535u)));
    {
      wuffs_base__status t_0 = wuffs_jpeg__decoder__decode_dht(self, v_r);
      v_status = t_0;
    }
    v_r = o_0_v_r;
    iop_v_r = o_0_iop_v_r;
    io0_v_r = o_0_io0_v_r;
    io1_v_r = o_0_io1_v_r;
    io2_v_r = o_0_io2_v_r;
  }
  status = v_status;
  if (wuffs_base__status__is_error(&status)) {
    goto exit;
  } else if (wuffs_base__status__is_suspension(&status)) {
    status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
    goto exit;
  }
  goto ok;

  ok:
  goto exit;
  exit:
  return status;
}

// -------- func jpeg.decoder.calculate_single_component_scan_fields

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__calculate_single_component_scan_fields(
    wuffs_jpeg__decoder* self) {
  uint8_t v_csel = 0;

  self->private_impl.f_scan_comps_bx_offset[0u] = 0u;
  self->private_impl.f_scan_comps_by_offset[0u] = 0u;
  self->private_impl.f_mcu_num_blocks = 1u;
  self->private_impl.f_mcu_blocks_sselector[0u] = 0u;
  v_csel = self->private_impl.f_scan_comps_cselector[0u];
  self->private_impl.f_mcu_blocks_offset[0u] = self->private_impl.f_components_workbuf_offsets[v_csel];
  self->private_impl.f_mcu_blocks_mx_mul[0u] = 8u;
  self->private_impl.f_mcu_blocks_my_mul[0u] = (8u * self->private_impl.f_components_workbuf_widths[v_csel]);
  self->private_impl.f_mcu_blocks_dc_hselector[0u] = ((uint8_t)(0u | self->private_impl.f_scan_comps_td[0u]));
  self->private_impl.f_mcu_blocks_ac_hselector[0u] = ((uint8_t)(4u | self->private_impl.f_scan_comps_ta[0u]));
  self->private_impl.f_scan_width_in_mcus = wuffs_jpeg__decoder__quantize_dimension(self, self->private_impl.f_width, self->private_impl.f_components_h[v_csel], self->private_impl.f_max_incl_components_h);
  self->private_impl.f_scan_height_in_mcus = wuffs_jpeg__decoder__quantize_dimension(self, self->private_impl.f_height, self->private_impl.f_components_v[v_csel], self->private_impl.f_max_incl_components_v);
  return wuffs_base__make_empty_struct();
}

// -------- func jpeg.decoder.calculate_multiple_component_scan_fields

WUFFS_BASE__GENERATED_C_CODE
static bool
wuffs_jpeg__decoder__calculate_multiple_component_scan_fields(
    wuffs_jpeg__decoder* self) {
  uint32_t v_i = 0;
  uint32_t v_h = 0;
  uint32_t v_v = 0;
  uint32_t v_hv = 0;
  uint32_t v_total_hv = 0;
  uint32_t v_b = 0;
  uint32_t v_bx_offset = 0;
  uint32_t v_by_offset = 0;
  uint32_t v_sibo = 0;
  uint8_t v_ssel = 0;
  uint8_t v_csel = 0;

  v_total_hv = 0u;
  v_i = 0u;
  v_b = 0u;
  v_bx_offset = 0u;
  v_by_offset = 0u;
  while (v_i < self->private_impl.f_scan_num_components) {
    v_h = ((uint32_t)(self->private_impl.f_components_h[self->private_impl.f_scan_comps_cselector[v_i]]));
    v_v = ((uint32_t)(self->private_impl.f_components_v[self->private_impl.f_scan_comps_cselector[v_i]]));
    v_hv = (((uint32_t)(self->private_impl.f_components_h[self->private_impl.f_scan_comps_cselector[v_i]])) * ((uint32_t)(self->private_impl.f_components_v[self->private_impl.f_scan_comps_cselector[v_i]])));
    self->private_impl.f_swizzle_immediately_c_offsets[v_i] = ((uint32_t)(64u * v_total_hv));
    v_total_hv += v_hv;
    while (v_hv > 0u) {
      self->private_impl.f_scan_comps_bx_offset[(v_b & 15u)] = ((uint8_t)((v_bx_offset & 3u)));
      self->private_impl.f_scan_comps_by_offset[(v_b & 15u)] = ((uint8_t)((v_by_offset & 3u)));
      self->private_impl.f_mcu_blocks_sselector[(v_b & 15u)] = ((uint8_t)(v_i));
      v_b += 1u;
      v_bx_offset += 1u;
      if (v_bx_offset == v_h) {
        v_bx_offset = 0u;
        v_by_offset += 1u;
        if (v_by_offset == v_v) {
          v_by_offset = 0u;
        }
      }
      v_hv -= 1u;
    }
    v_i += 1u;
  }
  if (v_total_hv > 10u) {
    return true;
  }
  self->private_impl.f_mcu_num_blocks = v_total_hv;
  self->private_impl.f_swizzle_immediately_c_offsets[self->private_impl.f_scan_num_components] = ((uint32_t)(64u * v_total_hv));
  v_b = 0u;
  while (v_b < self->private_impl.f_mcu_num_blocks) {
    v_ssel = self->private_impl.f_mcu_blocks_sselector[v_b];
    v_csel = self->private_impl.f_scan_comps_cselector[v_ssel];
    self->private_impl.f_mcu_blocks_offset[v_b] = (self->private_impl.f_components_workbuf_offsets[v_csel] + (8u * ((uint64_t)(self->private_impl.f_scan_comps_bx_offset[v_b]))) + (8u * ((uint64_t)(self->private_impl.f_scan_comps_by_offset[v_b])) * ((uint64_t)(self->private_impl.f_components_workbuf_widths[v_csel]))));
    self->private_impl.f_mcu_blocks_mx_mul[v_b] = (8u * ((uint32_t)(self->private_impl.f_components_h[v_csel])));
    self->private_impl.f_mcu_blocks_my_mul[v_b] = (8u * ((uint32_t)(self->private_impl.f_components_v[v_csel])) * self->private_impl.f_components_workbuf_widths[v_csel]);
    self->private_impl.f_mcu_blocks_dc_hselector[v_b] = ((uint8_t)(0u | self->private_impl.f_scan_comps_td[v_ssel]));
    self->private_impl.f_mcu_blocks_ac_hselector[v_b] = ((uint8_t)(4u | self->private_impl.f_scan_comps_ta[v_ssel]));
    v_sibo = ((uint32_t)(self->private_impl.f_swizzle_immediately_c_offsets[v_csel] + ((8u * ((uint32_t)(self->private_impl.f_scan_comps_bx_offset[v_b]))) + (64u * ((uint32_t)(self->private_impl.f_scan_comps_by_offset[v_b])) * ((uint32_t)(self->private_impl.f_components_h[v_csel]))))));
    self->private_impl.f_swizzle_immediately_b_offsets[v_b] = wuffs_base__u32__min(v_sibo, 576u);
    v_b += 1u;
  }
  self->private_impl.f_scan_width_in_mcus = self->private_impl.f_width_in_mcus;
  self->private_impl.f_scan_height_in_mcus = self->private_impl.f_height_in_mcus;
  return false;
}

// -------- func jpeg.decoder.fill_bitstream

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__fill_bitstream(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src) {
  uint32_t v_wi = 0;
  uint8_t v_c8 = 0;
  uint32_t v_new_wi = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  if (self->private_impl.f_bitstream_ri <= 0u) {
  } else if (self->private_impl.f_bitstream_ri >= self->private_impl.f_bitstream_wi) {
    self->private_impl.f_bitstream_ri = 0u;
    self->private_impl.f_bitstream_wi = 0u;
  } else {
    v_wi = (self->private_impl.f_bitstream_wi - self->private_impl.f_bitstream_ri);
    wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__make_slice_u8(self->private_data.f_bitstream_buffer, 2048), wuffs_base__make_slice_u8_ij(self->private_data.f_bitstream_buffer,
        self->private_impl.f_bitstream_ri,
        self->private_impl.f_bitstream_wi));
    self->private_impl.f_bitstream_ri = 0u;
    self->private_impl.f_bitstream_wi = v_wi;
  }
  v_wi = self->private_impl.f_bitstream_wi;
  while ((v_wi < 2048u) && (((uint64_t)(io2_a_src - iop_a_src)) > 0u)) {
    v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
    if (v_c8 < 255u) {
      self->private_data.f_bitstream_buffer[v_wi] = v_c8;
      v_wi += 1u;
      iop_a_src += 1u;
      continue;
    } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 1u) {
      break;
    }
    v_c8 = iop_a_src[1u];
    if (v_c8 == 0u) {
      self->private_data.f_bitstream_buffer[v_wi] = 255u;
      v_wi += 1u;
      iop_a_src += 2u;
      continue;
    } else if (v_c8 < 255u) {
      break;
    }
    iop_a_src += 1u;
  }
  if (((uint64_t)(io2_a_src - iop_a_src)) > 1u) {
    if ((wuffs_base__peek_u8be__no_bounds_check(iop_a_src) >= 255u) && (((uint16_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src) >> 8u)) > 0u)) {
      v_new_wi = (wuffs_base__u32__min(v_wi, 1784u) + 264u);
      v_new_wi = wuffs_base__u32__min(v_new_wi, (v_wi + self->private_impl.f_bitstream_padding));
      if (v_wi < v_new_wi) {
        wuffs_private_impl__u32__sat_sub_indirect(&self->private_impl.f_bitstream_padding, (v_new_wi - v_wi));
        wuffs_private_impl__bulk_memset(&self->private_data.f_bitstream_buffer[v_wi], (v_new_wi - v_wi), 0u);
        v_wi = v_new_wi;
      }
    }
  }
  self->private_impl.f_bitstream_wi = v_wi;
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return wuffs_base__make_empty_struct();
}

// -------- func jpeg.decoder.load_mcu_blocks_for_single_component

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__load_mcu_blocks_for_single_component(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_csel) {
  return (*self->private_impl.choosy_load_mcu_blocks_for_single_component)(self, a_mx, a_my, a_workbuf, a_csel);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__load_mcu_blocks_for_single_component__choosy_default(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_csel) {
  uint64_t v_stride16 = 0;
  uint64_t v_offset = 0;

  v_stride16 = ((uint64_t)((self->private_impl.f_components_workbuf_widths[a_csel] * 16u)));
  v_offset = (self->private_impl.f_components_workbuf_offsets[(a_csel | 4u)] + (((uint64_t)(a_mx)) * 128u) + (((uint64_t)(a_my)) * v_stride16));
  if (v_offset <= ((uint64_t)(a_workbuf.len))) {
    wuffs_private_impl__bulk_load_host_endian(&self->private_data.f_mcu_blocks[0], 1u * (size_t)128u, wuffs_base__slice_u8__subslice_i(a_workbuf, v_offset));
  }
  return wuffs_base__make_empty_struct();
}

// -------- func jpeg.decoder.load_mcu_blocks

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__load_mcu_blocks(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf) {
  uint32_t v_b = 0;
  uint8_t v_csel = 0;
  uint64_t v_h = 0;
  uint64_t v_v = 0;
  uint64_t v_stride16 = 0;
  uint64_t v_offset = 0;

  v_h = 1u;
  v_v = 1u;
  v_b = 0u;
  while (v_b < self->private_impl.f_mcu_num_blocks) {
    v_csel = self->private_impl.f_scan_comps_cselector[self->private_impl.f_mcu_blocks_sselector[v_b]];
    if (self->private_impl.f_scan_num_components > 1u) {
      v_h = ((uint64_t)(self->private_impl.f_components_h[v_csel]));
      v_v = ((uint64_t)(self->private_impl.f_components_v[v_csel]));
    }
    v_stride16 = ((uint64_t)((self->private_impl.f_components_workbuf_widths[v_csel] * 16u)));
    v_offset = (self->private_impl.f_components_workbuf_offsets[((uint8_t)(v_csel | 4u))] + (((v_h * ((uint64_t)(a_mx))) + ((uint64_t)(self->private_impl.f_scan_comps_bx_offset[v_b]))) * 128u) + (((v_v * ((uint64_t)(a_my))) + ((uint64_t)(self->private_impl.f_scan_comps_by_offset[v_b]))) * v_stride16));
    if (v_offset <= ((uint64_t)(a_workbuf.len))) {
      wuffs_private_impl__bulk_load_host_endian(&self->private_data.f_mcu_blocks[v_b], 1u * (size_t)128u, wuffs_base__slice_u8__subslice_i(a_workbuf, v_offset));
    }
    v_b += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func jpeg.decoder.save_mcu_blocks

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__save_mcu_blocks(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf) {
  uint32_t v_b = 0;
  uint8_t v_csel = 0;
  uint64_t v_h = 0;
  uint64_t v_v = 0;
  uint64_t v_stride16 = 0;
  uint64_t v_offset = 0;

  v_h = 1u;
  v_v = 1u;
  v_b = 0u;
  while (v_b < self->private_impl.f_mcu_num_blocks) {
    v_csel = self->private_impl.f_scan_comps_cselector[self->private_impl.f_mcu_blocks_sselector[v_b]];
    if (self->private_impl.f_scan_num_components > 1u) {
      v_h = ((uint64_t)(self->private_impl.f_components_h[v_csel]));
      v_v = ((uint64_t)(self->private_impl.f_components_v[v_csel]));
    }
    v_stride16 = ((uint64_t)((self->private_impl.f_components_workbuf_widths[v_csel] * 16u)));
    v_offset = (self->private_impl.f_components_workbuf_offsets[((uint8_t)(v_csel | 4u))] + (((v_h * ((uint64_t)(a_mx))) + ((uint64_t)(self->private_impl.f_scan_comps_bx_offset[v_b]))) * 128u) + (((v_v * ((uint64_t)(a_my))) + ((uint64_t)(self->private_impl.f_scan_comps_by_offset[v_b]))) * v_stride16));
    if (v_offset <= ((uint64_t)(a_workbuf.len))) {
      wuffs_private_impl__bulk_save_host_endian(&self->private_data.f_mcu_blocks[v_b], 1u * (size_t)128u, wuffs_base__slice_u8__subslice_i(a_workbuf, v_offset));
    }
    v_b += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func jpeg.decoder.skip_past_the_next_restart_marker

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__skip_past_the_next_restart_marker(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_skip_past_the_next_restart_marker;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      if (((uint64_t)(io2_a_src - iop_a_src)) < 2u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
        continue;
      } else if (wuffs_base__peek_u8be__no_bounds_check(iop_a_src) < 255u) {
        iop_a_src += 1u;
        continue;
      }
      v_c8 = ((uint8_t)(((uint16_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src) >> 8u))));
      if (v_c8 < 192u) {
        iop_a_src += 2u;
        continue;
      } else if ((v_c8 < 208u) || (215u < v_c8)) {
        break;
      }
      v_c8 &= 7u;
      if ((self->private_impl.f_next_restart_marker == ((uint8_t)(((uint8_t)(v_c8 + 1u)) & 7u))) || (self->private_impl.f_next_restart_marker == ((uint8_t)(((uint8_t)(v_c8 + 2u)) & 7u)))) {
        break;
      } else if ((self->private_impl.f_next_restart_marker == ((uint8_t)(((uint8_t)(v_c8 + 7u)) & 7u))) || (self->private_impl.f_next_restart_marker == ((uint8_t)(((uint8_t)(v_c8 + 6u)) & 7u)))) {
        iop_a_src += 2u;
        continue;
      } else {
        iop_a_src += 2u;
        break;
      }
    }
    self->private_impl.f_next_restart_marker = ((uint8_t)(((uint8_t)(self->private_impl.f_next_restart_marker + 1u)) & 7u));

    ok:
    self->private_impl.p_skip_past_the_next_restart_marker = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_skip_past_the_next_restart_marker = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func jpeg.decoder.apply_progressive_idct

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__apply_progressive_idct(
    wuffs_jpeg__decoder* self,
    wuffs_base__slice_u8 a_workbuf) {
  uint32_t v_csel = 0;
  bool v_block_smoothing_applicable = false;
  uint32_t v_scan_width_in_mcus = 0;
  uint32_t v_scan_height_in_mcus = 0;
  uint32_t v_mcu_blocks_mx_mul_0 = 0;
  uint32_t v_mcu_blocks_my_mul_0 = 0;
  uint32_t v_my = 0;
  uint32_t v_mx = 0;
  uint64_t v_stride = 0;
  uint64_t v_offset = 0;
  uint8_t v_stashed_mcu_blocks_0[128] = {0};

  wuffs_private_impl__bulk_save_host_endian(&self->private_data.f_mcu_blocks[0], 1u * (size_t)128u, wuffs_base__make_slice_u8(v_stashed_mcu_blocks_0, 128));
  v_block_smoothing_applicable = true;
  v_csel = 0u;
  while (v_csel < self->private_impl.f_num_components) {
    if ((self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][0u] >= 16u) || wuffs_jpeg__decoder__top_left_quants_has_zero(self, ((uint32_t)(self->private_impl.f_components_tq[v_csel])))) {
      v_block_smoothing_applicable = false;
    }
    v_csel += 1u;
  }
  v_csel = 0u;
  while (v_csel < self->private_impl.f_num_components) {
    v_scan_width_in_mcus = wuffs_jpeg__decoder__quantize_dimension(self, self->private_impl.f_width, self->private_impl.f_components_h[v_csel], self->private_impl.f_max_incl_components_h);
    v_scan_height_in_mcus = wuffs_jpeg__decoder__quantize_dimension(self, self->private_impl.f_height, self->private_impl.f_components_v[v_csel], self->private_impl.f_max_incl_components_v);
    v_mcu_blocks_mx_mul_0 = 8u;
    v_mcu_blocks_my_mul_0 = (8u * self->private_impl.f_components_workbuf_widths[v_csel]);
    if (v_block_smoothing_applicable && (0u != (self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][1u] |
        self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][2u] |
        self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][3u] |
        self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][4u] |
        self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][5u] |
        self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][6u] |
        self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][8u] |
        self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][8u] |
        self->private_impl.f_block_smoothing_lowest_scan_al[v_csel][9u]))) {
      self->private_impl.choosy_load_mcu_blocks_for_single_component = (
          &wuffs_jpeg__decoder__load_mcu_blocks_for_single_component_smooth);
      self->private_impl.f_block_smoothing_mx_max_incl = wuffs_base__u32__sat_sub(v_scan_width_in_mcus, 1u);
      self->private_impl.f_block_smoothing_my_max_incl = wuffs_base__u32__sat_sub(v_scan_height_in_mcus, 1u);
    } else {
      self->private_impl.choosy_load_mcu_blocks_for_single_component = (
          &wuffs_jpeg__decoder__load_mcu_blocks_for_single_component__choosy_default);
    }
    v_my = 0u;
    while (v_my < v_scan_height_in_mcus) {
      v_mx = 0u;
      while (v_mx < v_scan_width_in_mcus) {
        wuffs_jpeg__decoder__load_mcu_blocks_for_single_component(self,
            v_mx,
            v_my,
            a_workbuf,
            v_csel);
        v_stride = ((uint64_t)(self->private_impl.f_components_workbuf_widths[v_csel]));
        v_offset = (self->private_impl.f_components_workbuf_offsets[v_csel] + (((uint64_t)(v_mcu_blocks_mx_mul_0)) * ((uint64_t)(v_mx))) + (((uint64_t)(v_mcu_blocks_my_mul_0)) * ((uint64_t)(v_my))));
        if (v_offset <= ((uint64_t)(a_workbuf.len))) {
          wuffs_jpeg__decoder__decode_idct(self, wuffs_base__slice_u8__subslice_i(a_workbuf, v_offset), v_stride, ((uint32_t)(self->private_impl.f_components_tq[v_csel])));
        }
        v_mx += 1u;
      }
      v_my += 1u;
    }
    v_csel += 1u;
  }
  wuffs_private_impl__bulk_load_host_endian(&self->private_data.f_mcu_blocks[0], 1u * (size_t)128u, wuffs_base__make_slice_u8(v_stashed_mcu_blocks_0, 128));
  return wuffs_base__make_empty_struct();
}

// -------- func jpeg.decoder.swizzle_gray

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__swizzle_gray(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_x0,
    uint32_t a_x1,
    uint32_t a_y0,
    uint32_t a_y1,
    uint64_t a_stride) {
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_x0 = 0;
  uint64_t v_x1 = 0;
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint32_t v_y = 0;
  uint32_t v_y1 = 0;

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_x0 = ((uint64_t)((v_dst_bytes_per_pixel * wuffs_base__u32__min(a_x0, self->private_impl.f_width))));
  v_x1 = ((uint64_t)((v_dst_bytes_per_pixel * wuffs_base__u32__min(a_x1, self->private_impl.f_width))));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  v_y = a_y0;
  v_y1 = wuffs_base__u32__min(a_y1, self->private_impl.f_height);
  while (v_y < v_y1) {
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, v_y);
    if (v_x1 < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_x1);
    }
    if (v_x0 < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_x0);
    } else {
      v_dst = wuffs_base__utility__empty_slice_u8();
    }
    wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024)), a_workbuf);
    if (a_stride <= ((uint64_t)(a_workbuf.len))) {
      a_workbuf = wuffs_base__slice_u8__subslice_i(a_workbuf, a_stride);
    } else {
      a_workbuf = wuffs_base__utility__empty_slice_u8();
    }
    v_y += 1u;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func jpeg.decoder.swizzle_colorful

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_jpeg__decoder__swizzle_colorful(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_x0,
    uint32_t a_x1,
    uint32_t a_y0,
    uint32_t a_y1) {
  uint64_t v_i = 0;
  uint64_t v_j = 0;
  wuffs_base__slice_u8 v_src0 = {0};
  wuffs_base__slice_u8 v_src1 = {0};
  wuffs_base__slice_u8 v_src2 = {0};
  wuffs_base__slice_u8 v_src3 = {0};
  uint32_t v_width0 = 0;
  uint32_t v_width1 = 0;
  uint32_t v_width2 = 0;
  uint32_t v_width3 = 0;
  uint32_t v_height0 = 0;
  uint32_t v_height1 = 0;
  uint32_t v_height2 = 0;
  uint32_t v_height3 = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  if (self->private_impl.f_swizzle_immediately) {
    v_i = ((uint64_t)(self->private_impl.f_swizzle_immediately_c_offsets[0u]));
    v_j = ((uint64_t)(self->private_impl.f_swizzle_immediately_c_offsets[1u]));
    if ((v_i <= v_j) && (v_j <= 640u)) {
      v_src0 = wuffs_base__make_slice_u8_ij(self->private_data.f_swizzle_immediately_buffer, v_i, v_j);
      v_width0 = (8u * ((uint32_t)(self->private_impl.f_components_h[0u])));
      v_height0 = (8u * ((uint32_t)(self->private_impl.f_components_v[0u])));
    }
    v_i = ((uint64_t)(self->private_impl.f_swizzle_immediately_c_offsets[1u]));
    v_j = ((uint64_t)(self->private_impl.f_swizzle_immediately_c_offsets[2u]));
    if ((v_i <= v_j) && (v_j <= 640u)) {
      v_src1 = wuffs_base__make_slice_u8_ij(self->private_data.f_swizzle_immediately_buffer, v_i, v_j);
      v_width1 = (8u * ((uint32_t)(self->private_impl.f_components_h[1u])));
      v_height1 = (8u * ((uint32_t)(self->private_impl.f_components_v[1u])));
    }
    v_i = ((uint64_t)(self->private_impl.f_swizzle_immediately_c_offsets[2u]));
    v_j = ((uint64_t)(self->private_impl.f_swizzle_immediately_c_offsets[3u]));
    if ((v_i <= v_j) && (v_j <= 640u)) {
      v_src2 = wuffs_base__make_slice_u8_ij(self->private_data.f_swizzle_immediately_buffer, v_i, v_j);
      v_width2 = (8u * ((uint32_t)(self->private_impl.f_components_h[2u])));
      v_height2 = (8u * ((uint32_t)(self->private_impl.f_components_v[2u])));
    }
    v_i = ((uint64_t)(self->private_impl.f_swizzle_immediately_c_offsets[3u]));
    v_j = ((uint64_t)(self->private_impl.f_swizzle_immediately_c_offsets[4u]));
    if ((v_i <= v_j) && (v_j <= 640u)) {
      v_src3 = wuffs_base__make_slice_u8_ij(self->private_data.f_swizzle_immediately_buffer, v_i, v_j);
      v_width3 = (8u * ((uint32_t)(self->private_impl.f_components_h[3u])));
      v_height3 = (8u * ((uint32_t)(self->private_impl.f_components_v[3u])));
    }
  } else {
    if ((self->private_impl.f_components_workbuf_offsets[0u] <= self->private_impl.f_components_workbuf_offsets[1u]) && (self->private_impl.f_components_workbuf_offsets[1u] <= ((uint64_t)(a_workbuf.len)))) {
      v_src0 = wuffs_base__slice_u8__subslice_ij(a_workbuf,
          self->private_impl.f_components_workbuf_offsets[0u],
          self->private_impl.f_components_workbuf_offsets[1u]);
      v_width0 = self->private_impl.f_components_workbuf_widths[0u];
      v_height0 = self->private_impl.f_components_workbuf_heights[0u];
    }
    if ((self->private_impl.f_components_workbuf_offsets[1u] <= self->private_impl.f_components_workbuf_offsets[2u]) && (self->private_impl.f_components_workbuf_offsets[2u] <= ((uint64_t)(a_workbuf.len)))) {
      v_src1 = wuffs_base__slice_u8__subslice_ij(a_workbuf,
          self->private_impl.f_components_workbuf_offsets[1u],
          self->private_impl.f_components_workbuf_offsets[2u]);
      v_width1 = self->private_impl.f_components_workbuf_widths[1u];
      v_height1 = self->private_impl.f_components_workbuf_heights[1u];
    }
    if ((self->private_impl.f_components_workbuf_offsets[2u] <= self->private_impl.f_components_workbuf_offsets[3u]) && (self->private_impl.f_components_workbuf_offsets[3u] <= ((uint64_t)(a_workbuf.len)))) {
      v_src2 = wuffs_base__slice_u8__subslice_ij(a_workbuf,
          self->private_impl.f_components_workbuf_offsets[2u],
          self->private_impl.f_components_workbuf_offsets[3u]);
      v_width2 = self->private_impl.f_components_workbuf_widths[2u];
      v_height2 = self->private_impl.f_components_workbuf_heights[2u];
    }
    if ((self->private_impl.f_components_workbuf_offsets[3u] <= self->private_impl.f_components_workbuf_offsets[4u]) && (self->private_impl.f_components_workbuf_offsets[4u] <= ((uint64_t)(a_workbuf.len)))) {
      v_src3 = wuffs_base__slice_u8__subslice_ij(a_workbuf,
          self->private_impl.f_components_workbuf_offsets[3u],
          self->private_impl.f_components_workbuf_offsets[4u]);
      v_width3 = self->private_impl.f_components_workbuf_widths[3u];
      v_height3 = self->private_impl.f_components_workbuf_heights[3u];
    }
  }
  v_status = wuffs_base__pixel_swizzler__swizzle_ycck(&self->private_impl.f_swizzler,
      a_dst,
      wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024)),
      (a_x0 & 65535u),
      wuffs_base__u32__min(a_x1, self->private_impl.f_width),
      (a_y0 & 65535u),
      wuffs_base__u32__min(a_y1, self->private_impl.f_height),
      v_src0,
      v_src1,
      v_src2,
      v_src3,
      v_width0,
      v_width1,
      v_width2,
      v_width3,
      v_height0,
      v_height1,
      v_height2,
      v_height3,
      v_width0,
      v_width1,
      v_width2,
      v_width3,
      self->private_impl.f_components_h[0u],
      self->private_impl.f_components_h[1u],
      self->private_impl.f_components_h[2u],
      self->private_impl.f_components_h[3u],
      self->private_impl.f_components_v[0u],
      self->private_impl.f_components_v[1u],
      self->private_impl.f_components_v[2u],
      self->private_impl.f_components_v[3u],
      self->private_impl.f_is_rgb_or_cmyk,
      ! self->private_impl.f_use_lower_quality,
      wuffs_base__make_slice_u8(self->private_data.f_swizzle_ycck_scratch_buffer_2k, 2048));
  return wuffs_private_impl__status__ensure_not_a_suspension(v_status);
}

// -------- func jpeg.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_jpeg__decoder__frame_dirty_rect(
    const wuffs_jpeg__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func jpeg.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_jpeg__decoder__num_animation_loops(
    const wuffs_jpeg__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func jpeg.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_jpeg__decoder__num_decoded_frame_configs(
    const wuffs_jpeg__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func jpeg.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_jpeg__decoder__num_decoded_frames(
    const wuffs_jpeg__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func jpeg.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__restart_frame(
    wuffs_jpeg__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  uint32_t v_i = 0;
  uint32_t v_j = 0;

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if (a_index != 0u) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  self->private_impl.f_bitstream_is_closed = false;
  self->private_impl.f_expect_multiple_scans = false;
  self->private_impl.f_frame_config_io_position = a_io_position;
  self->private_impl.f_scan_count = 0u;
  self->private_impl.f_restart_interval = self->private_impl.f_saved_restart_interval;
  v_i = 0u;
  while (v_i < 4u) {
    self->private_impl.f_seen_dqt[v_i] = self->private_impl.f_saved_seen_dqt[v_i];
    v_j = 0u;
    while (v_j < 64u) {
      self->private_impl.f_quant_tables[v_i][v_j] = self->private_impl.f_saved_quant_tables[v_i][v_j];
      v_j += 1u;
    }
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 4u) {
    v_j = 0u;
    while (v_j < 10u) {
      self->private_impl.f_block_smoothing_lowest_scan_al[v_i][v_j] = 16u;
      v_j += 1u;
    }
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 8u) {
    self->private_impl.f_seen_dht[v_i] = false;
    v_i += 1u;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func jpeg.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_jpeg__decoder__set_report_metadata(
    wuffs_jpeg__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func jpeg.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_jpeg__decoder__tell_me_more(
    wuffs_jpeg__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func jpeg.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_jpeg__decoder__workbuf_len(
    const wuffs_jpeg__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  if (self->private_impl.f_use_lower_quality && (self->private_impl.f_sof_marker < 194u)) {
    return wuffs_base__utility__make_range_ii_u64(0u, self->private_impl.f_components_workbuf_offsets[8u]);
  }
  return wuffs_base__utility__make_range_ii_u64(self->private_impl.f_components_workbuf_offsets[8u], self->private_impl.f_components_workbuf_offsets[8u]);
}

// -------- func jpeg.decoder.top_left_quants_has_zero

WUFFS_BASE__GENERATED_C_CODE
static bool
wuffs_jpeg__decoder__top_left_quants_has_zero(
    const wuffs_jpeg__decoder* self,
    uint32_t a_q) {
  return ((self->private_impl.f_quant_tables[a_q][0u] == 0u) ||
      (self->private_impl.f_quant_tables[a_q][1u] == 0u) ||
      (self->private_impl.f_quant_tables[a_q][2u] == 0u) ||
      (self->private_impl.f_quant_tables[a_q][3u] == 0u) ||
      (self->private_impl.f_quant_tables[a_q][8u] == 0u) ||
      (self->private_impl.f_quant_tables[a_q][9u] == 0u) ||
      (self->private_impl.f_quant_tables[a_q][10u] == 0u) ||
      (self->private_impl.f_quant_tables[a_q][16u] == 0u) ||
      (self->private_impl.f_quant_tables[a_q][17u] == 0u) ||
      (self->private_impl.f_quant_tables[a_q][24u] == 0u));
}

// -------- func jpeg.decoder.load_mcu_blocks_for_single_component_smooth

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_jpeg__decoder__load_mcu_blocks_for_single_component_smooth(
    wuffs_jpeg__decoder* self,
    uint32_t a_mx,
    uint32_t a_my,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_csel) {
  uint64_t v_stride16 = 0;
  uint64_t v_offset = 0;
  uint32_t v_dx = 0;
  uint32_t v_dy = 0;
  uint32_t v_mx = 0;
  uint32_t v_my = 0;
  uint8_t v_q = 0;
  uint32_t v_q_00 = 0;
  uint32_t v_q_xy = 0;
  uint8_t v_al = 0;
  uint32_t v_scratch = 0;
  uint32_t v_limit = 0;

  v_stride16 = ((uint64_t)((self->private_impl.f_components_workbuf_widths[a_csel] * 16u)));
  v_offset = (self->private_impl.f_components_workbuf_offsets[(a_csel | 4u)] + (((uint64_t)(a_mx)) * 128u) + (((uint64_t)(a_my)) * v_stride16));
  if (v_offset <= ((uint64_t)(a_workbuf.len))) {
    wuffs_private_impl__bulk_load_host_endian(&self->private_data.f_mcu_blocks[0], 1u * (size_t)128u, wuffs_base__slice_u8__subslice_i(a_workbuf, v_offset));
  }
  v_dy = 0u;
  while (v_dy < 5u) {
    v_my = wuffs_base__u32__min(self->private_impl.f_block_smoothing_my_max_incl, wuffs_base__u32__sat_sub((a_my + v_dy), 2u));
    v_dx = 0u;
    while (v_dx < 5u) {
      v_mx = wuffs_base__u32__min(self->private_impl.f_block_smoothing_mx_max_incl, wuffs_base__u32__sat_sub((a_mx + v_dx), 2u));
      v_offset = (self->private_impl.f_components_workbuf_offsets[(a_csel | 4u)] + (((uint64_t)(v_mx)) * 128u) + (((uint64_t)(v_my)) * v_stride16));
      if (v_offset <= ((uint64_t)(a_workbuf.len))) {
        wuffs_private_impl__bulk_load_host_endian(&self->private_impl.f_block_smoothing_dc_values[v_dy][v_dx], 1u * (size_t)2u, wuffs_base__slice_u8__subslice_i(a_workbuf, v_offset));
      }
      v_dx += 1u;
    }
    v_dy += 1u;
  }
  v_q = self->private_impl.f_components_tq[a_csel];
  v_q_00 = ((uint32_t)(self->private_impl.f_quant_tables[v_q][0u]));
  if (v_q_00 <= 0u) {
    return wuffs_base__make_empty_struct();
  }
  if (0u != (16u &
      self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][1u] &
      self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][2u] &
      self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][3u] &
      self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][4u] &
      self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][5u] &
      self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][6u] &
      self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][7u] &
      self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][8u] &
      self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][9u])) {
    v_scratch = 0u;
    v_scratch += ((uint32_t)(4294967294u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
    v_scratch += ((uint32_t)(4294967290u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
    v_scratch += ((uint32_t)(4294967288u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
    v_scratch += ((uint32_t)(4294967290u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
    v_scratch += ((uint32_t)(4294967294u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
    v_scratch += ((uint32_t)(4294967290u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
    v_scratch += ((uint32_t)(6u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
    v_scratch += ((uint32_t)(42u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
    v_scratch += ((uint32_t)(6u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
    v_scratch += ((uint32_t)(4294967290u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
    v_scratch += ((uint32_t)(4294967288u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
    v_scratch += ((uint32_t)(42u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
    v_scratch += ((uint32_t)(152u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
    v_scratch += ((uint32_t)(42u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
    v_scratch += ((uint32_t)(4294967288u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
    v_scratch += ((uint32_t)(4294967290u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
    v_scratch += ((uint32_t)(6u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
    v_scratch += ((uint32_t)(42u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
    v_scratch += ((uint32_t)(6u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
    v_scratch += ((uint32_t)(4294967290u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
    v_scratch += ((uint32_t)(4294967294u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
    v_scratch += ((uint32_t)(4294967290u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
    v_scratch += ((uint32_t)(4294967288u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
    v_scratch += ((uint32_t)(4294967290u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
    v_scratch += ((uint32_t)(4294967294u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
    if (v_scratch < 2147483648u) {
      v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + 128u)) / 256u)));
    } else {
      v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + 128u)) / 256u)));
    }
    self->private_data.f_mcu_blocks[0u][0u] = ((uint16_t)(v_scratch));
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][1u]));
    if ((v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][1u] == 0u)) {
      v_scratch = 0u;
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(4294967293u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(13u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(4294967283u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(3u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(4294967293u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(38u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(4294967258u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(3u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(4294967293u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(13u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(4294967283u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(3u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      } else {
        v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      }
      self->private_data.f_mcu_blocks[0u][1u] = ((uint16_t)(v_scratch));
    }
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][2u]));
    if ((v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][2u] == 0u)) {
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(4294967291u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(7u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(4294967282u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(7u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(4294967291u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      } else {
        v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      }
      self->private_data.f_mcu_blocks[0u][2u] = ((uint16_t)(v_scratch));
    }
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][3u]));
    if ((v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][3u] == 0u)) {
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(4294967294u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      } else {
        v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      }
      self->private_data.f_mcu_blocks[0u][3u] = ((uint16_t)(v_scratch));
    }
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][8u]));
    if ((v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][8u] == 0u)) {
      v_scratch = 0u;
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(4294967293u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(4294967293u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(4294967293u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(13u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(38u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(13u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(4294967283u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(4294967258u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(4294967283u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(3u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(3u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(3u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      } else {
        v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      }
      self->private_data.f_mcu_blocks[0u][8u] = ((uint16_t)(v_scratch));
    }
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][9u]));
    if ((v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][9u] == 0u)) {
      v_scratch = 0u;
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(9u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(4294967287u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(4294967287u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(9u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      } else {
        v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      }
      self->private_data.f_mcu_blocks[0u][9u] = ((uint16_t)(v_scratch));
    }
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][10u]));
    if ((v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][10u] == 0u)) {
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(4294967293u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(3u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      } else {
        v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      }
      self->private_data.f_mcu_blocks[0u][10u] = ((uint16_t)(v_scratch));
    }
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][16u]));
    if ((v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][16u] == 0u)) {
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(7u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(4294967291u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(4294967282u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(4294967291u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(7u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      } else {
        v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      }
      self->private_data.f_mcu_blocks[0u][16u] = ((uint16_t)(v_scratch));
    }
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][17u]));
    if ((v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][17u] == 0u)) {
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(4294967293u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(3u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      } else {
        v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      }
      self->private_data.f_mcu_blocks[0u][17u] = ((uint16_t)(v_scratch));
    }
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][24u]));
    if ((v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][24u] == 0u)) {
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(2u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(4294967294u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      } else {
        v_scratch = ((uint32_t)(0u - (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u))));
      }
      self->private_data.f_mcu_blocks[0u][24u] = ((uint16_t)(v_scratch));
    }
  } else {
    v_al = self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][1u];
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][1u]));
    if ((v_al > 0u) && (v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][1u] == 0u)) {
      v_limit = ((((uint32_t)(1u)) << v_al) - 1u);
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(4294967289u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(50u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(4294967246u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(7u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      } else {
        v_scratch = ((uint32_t)(0u - wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      }
      self->private_data.f_mcu_blocks[0u][1u] = ((uint16_t)(v_scratch));
    }
    v_al = self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][5u];
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][2u]));
    if ((v_al > 0u) && (v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][2u] == 0u)) {
      v_limit = ((((uint32_t)(1u)) << v_al) - 1u);
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(13u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(4294967272u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(13u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      } else {
        v_scratch = ((uint32_t)(0u - wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      }
      self->private_data.f_mcu_blocks[0u][2u] = ((uint16_t)(v_scratch));
    }
    v_al = self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][2u];
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][8u]));
    if ((v_al > 0u) && (v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][8u] == 0u)) {
      v_limit = ((((uint32_t)(1u)) << v_al) - 1u);
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(4294967289u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(50u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(4294967246u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(7u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      } else {
        v_scratch = ((uint32_t)(0u - wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      }
      self->private_data.f_mcu_blocks[0u][8u] = ((uint16_t)(v_scratch));
    }
    v_al = self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][4u];
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][9u]));
    if ((v_al > 0u) && (v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][9u] == 0u)) {
      v_limit = ((((uint32_t)(1u)) << v_al) - 1u);
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(10u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(4294967286u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(4294967286u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(10u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(1u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      } else {
        v_scratch = ((uint32_t)(0u - wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      }
      self->private_data.f_mcu_blocks[0u][9u] = ((uint16_t)(v_scratch));
    }
    v_al = self->private_impl.f_block_smoothing_lowest_scan_al[a_csel][3u];
    v_q_xy = ((uint32_t)(self->private_impl.f_quant_tables[v_q][16u]));
    if ((v_al > 0u) && (v_q_xy > 0u) && (self->private_data.f_mcu_blocks[0u][16u] == 0u)) {
      v_limit = ((((uint32_t)(1u)) << v_al) - 1u);
      v_scratch = 0u;
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][1u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[0u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][1u])));
      v_scratch += ((uint32_t)(13u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[1u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][1u])));
      v_scratch += ((uint32_t)(4294967272u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[2u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][1u])));
      v_scratch += ((uint32_t)(13u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[3u][4u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][0u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][1u])));
      v_scratch += ((uint32_t)(4294967295u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][2u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][3u])));
      v_scratch += ((uint32_t)(0u * wuffs_base__utility__sign_extend_convert_u16_u32(self->private_impl.f_block_smoothing_dc_values[4u][4u])));
      v_scratch *= v_q_00;
      if (v_scratch < 2147483648u) {
        v_scratch = ((uint32_t)(0u + wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u + v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      } else {
        v_scratch = ((uint32_t)(0u - wuffs_base__u32__min(v_limit, (((uint32_t)(((uint32_t)(0u - v_scratch)) + (v_q_xy << 7u))) / (v_q_xy << 8u)))));
      }
      self->private_data.f_mcu_blocks[0u][16u] = ((uint16_t)(v_scratch));
    }
  }
  return wuffs_base__make_empty_struct();
}

// -------- func jpeg.decoder.decode_mcu

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my) {
  return (*self->private_impl.choosy_decode_mcu)(self, a_dst, a_workbuf, a_mx, a_my);
}

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu__choosy_default(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my) {
  uint32_t v_ret = 0;
  uint64_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint8_t v_csel = 0;
  wuffs_base__io_buffer u_r = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_r = &u_r;
  const uint8_t* iop_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io0_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint32_t v_pos = 0;
  uint8_t v_dc_h = 0;
  uint32_t v_dc_symbol = 0;
  uint32_t v_dc_ht_fast = 0;
  uint32_t v_dc_bl = 0;
  uint32_t v_dc_code = 0;
  uint32_t v_dc_blm1 = 0;
  uint32_t v_dc_ht_slow = 0;
  uint16_t v_dc_value = 0;
  uint16_t v_dc_extend = 0;
  const uint16_t* v_ac_huff_table_fast = NULL;
  uint8_t v_ac_h = 0;
  uint32_t v_ac_symbol = 0;
  uint32_t v_ac_ht_fast = 0;
  uint32_t v_ac_bl = 0;
  uint32_t v_ac_code = 0;
  uint32_t v_ac_blm1 = 0;
  uint32_t v_ac_ht_slow = 0;
  uint16_t v_ac_value = 0;
  uint16_t v_ac_extend = 0;
  uint32_t v_ac_rrrr = 0;
  uint32_t v_ac_ssss = 0;
  uint32_t v_z = 0;
  uint32_t v_mcb = 0;
  uint64_t v_stride = 0;
  uint64_t v_offset = 0;

  v_bits = self->private_impl.f_bitstream_bits;
  v_n_bits = self->private_impl.f_bitstream_n_bits;
  if (self->private_impl.f_bitstream_ri > self->private_impl.f_bitstream_wi) {
    return 2u;
  }
  {
    wuffs_base__io_buffer* o_0_v_r = v_r;
    const uint8_t* o_0_iop_v_r = iop_v_r;
    const uint8_t* o_0_io0_v_r = io0_v_r;
    const uint8_t* o_0_io1_v_r = io1_v_r;
    const uint8_t* o_0_io2_v_r = io2_v_r;
    v_r = wuffs_private_impl__io_reader__set(
        &u_r,
        &iop_v_r,
        &io0_v_r,
        &io1_v_r,
        &io2_v_r,
        wuffs_base__make_slice_u8_ij(self->private_data.f_bitstream_buffer,
        self->private_impl.f_bitstream_ri,
        self->private_impl.f_bitstream_wi),
        ((uint64_t)(self->private_impl.f_bitstream_ri)));
    do {
      while (self->private_impl.f_mcu_current_block < self->private_impl.f_mcu_num_blocks) {
        while (self->private_impl.f_mcu_zig_index <= 0u) {
          wuffs_private_impl__bulk_memset(&self->private_data.f_mcu_blocks[0], 1u * (size_t)128u, 0u);
          if (((uint64_t)(io2_v_r - iop_v_r)) < 264u) {
            v_ret = 1u;
            goto label__goto_done__break;
          }
          v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
          iop_v_r += ((63u - (v_n_bits & 63u)) >> 3u);
          v_n_bits |= 56u;
          v_dc_h = self->private_impl.f_mcu_blocks_dc_hselector[self->private_impl.f_mcu_current_block];
          v_dc_ht_fast = ((uint32_t)(self->private_impl.f_huff_tables_fast[v_dc_h][(v_bits >> 56u)]));
          v_dc_bl = (v_dc_ht_fast >> 8u);
          if (v_n_bits >= v_dc_bl) {
            v_dc_symbol = (15u & v_dc_ht_fast);
            v_dc_extend = WUFFS_JPEG__EXTEND[v_dc_symbol];
            v_bits <<= (v_dc_bl & 63u);
            v_n_bits -= v_dc_bl;
          } else {
            v_dc_code = ((uint32_t)((v_bits >> 55u)));
            v_dc_blm1 = 8u;
            v_bits <<= 9u;
            v_n_bits -= 9u;
            while (true) {
              v_dc_ht_slow = self->private_impl.f_huff_tables_slow[v_dc_h][v_dc_blm1];
              if (v_dc_code < (v_dc_ht_slow >> 8u)) {
                v_dc_symbol = (15u & ((uint32_t)(self->private_impl.f_huff_tables_symbols[v_dc_h][(255u & ((uint32_t)(v_dc_code + v_dc_ht_slow)))])));
                v_dc_extend = WUFFS_JPEG__EXTEND[v_dc_symbol];
                break;
              }
              v_dc_code = (((uint32_t)(v_dc_code << 1u)) | ((uint32_t)((v_bits >> 63u))));
              v_bits <<= 1u;
              v_n_bits -= 1u;
              v_dc_blm1 = ((v_dc_blm1 + 1u) & 15u);
              if (v_dc_blm1 == 0u) {
                v_dc_symbol = 0u;
                v_dc_extend = WUFFS_JPEG__EXTEND[v_dc_symbol];
                break;
              }
            }
          }
          v_dc_value = ((uint16_t)(((v_bits >> 32u) >> (32u - v_dc_symbol))));
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          v_dc_value += ((uint16_t)(v_dc_extend & ((uint16_t)(((uint16_t)(wuffs_base__utility__sign_extend_rshift_u64(v_bits, 63u))) ^ 65535u))));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
          v_bits <<= v_dc_symbol;
          v_n_bits -= v_dc_symbol;
          v_csel = self->private_impl.f_scan_comps_cselector[self->private_impl.f_mcu_blocks_sselector[self->private_impl.f_mcu_current_block]];
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          self->private_impl.f_mcu_previous_dc_values[v_csel] += v_dc_value;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
          self->private_data.f_mcu_blocks[0u][0u] = self->private_impl.f_mcu_previous_dc_values[v_csel];
          self->private_impl.f_mcu_zig_index = 1u;
          break;
        }
        if (((uint64_t)(io2_v_r - iop_v_r)) < 264u) {
          v_ret = 1u;
          goto label__goto_done__break;
        }
        if (v_n_bits < 16u) {
          v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
        }
        v_z = 1u;
        self->private_impl.f_mcu_zig_index = 0u;
        v_ac_h = self->private_impl.f_mcu_blocks_ac_hselector[self->private_impl.f_mcu_current_block];
        v_ac_huff_table_fast = &self->private_impl.f_huff_tables_fast[v_ac_h][0u];
        while (v_z < 64u) {
          v_ac_ht_fast = ((uint32_t)(v_ac_huff_table_fast[(v_bits >> 56u)]));
          if (((uint64_t)(io2_v_r - iop_v_r)) < 8u) {
            v_ret = 2u;
            goto label__goto_done__break;
          }
          v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
          iop_v_r += ((63u - (v_n_bits & 63u)) >> 3u);
          v_n_bits |= 56u;
          v_ac_bl = (v_ac_ht_fast >> 8u);
          if (v_n_bits >= v_ac_bl) {
            v_ac_symbol = (255u & v_ac_ht_fast);
            v_bits <<= (v_ac_bl & 63u);
            v_n_bits -= v_ac_bl;
          } else {
            v_ac_code = ((uint32_t)((v_bits >> 55u)));
            v_ac_blm1 = 8u;
            v_bits <<= 9u;
            v_n_bits -= 9u;
            while (true) {
              v_ac_ht_slow = self->private_impl.f_huff_tables_slow[v_ac_h][v_ac_blm1];
              if (v_ac_code < (v_ac_ht_slow >> 8u)) {
                v_ac_symbol = ((uint32_t)(self->private_impl.f_huff_tables_symbols[v_ac_h][(255u & ((uint32_t)(v_ac_code + v_ac_ht_slow)))]));
                break;
              }
              v_ac_code = (((uint32_t)(v_ac_code << 1u)) | ((uint32_t)((v_bits >> 63u))));
              v_bits <<= 1u;
              v_n_bits -= 1u;
              v_ac_blm1 = ((v_ac_blm1 + 1u) & 15u);
              if (v_ac_blm1 == 0u) {
                v_ac_symbol = 0u;
                break;
              }
            }
          }
          v_ac_rrrr = (v_ac_symbol >> 4u);
          v_z += (v_ac_rrrr + 1u);
          v_ac_ssss = (v_ac_symbol & 15u);
          v_ac_extend = WUFFS_JPEG__EXTEND[v_ac_ssss];
          if (v_ac_ssss > 0u) {
            v_ac_value = ((uint16_t)((v_bits >> (64u - v_ac_ssss))));
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
            v_ac_value += ((uint16_t)(v_ac_extend & ((uint16_t)(((uint16_t)(wuffs_base__utility__sign_extend_rshift_u64(v_bits, 63u))) ^ 65535u))));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
            v_bits <<= v_ac_ssss;
            v_n_bits -= v_ac_ssss;
            self->private_data.f_mcu_blocks[0u][WUFFS_JPEG__UNZIG[v_z]] = v_ac_value;
          } else if (v_ac_rrrr < 15u) {
            break;
          }
        }
        v_mcb = self->private_impl.f_mcu_current_block;
        self->private_impl.f_mcu_current_block += 1u;
        if (self->private_impl.f_test_only_interrupt_decode_mcu) {
          goto label__goto_done__break;
        }
        if ( ! self->private_impl.f_swizzle_immediately) {
          v_csel = self->private_impl.f_scan_comps_cselector[self->private_impl.f_mcu_blocks_sselector[v_mcb]];
          v_stride = ((uint64_t)(self->private_impl.f_components_workbuf_widths[v_csel]));
          v_offset = (self->private_impl.f_mcu_blocks_offset[v_mcb] + (((uint64_t)(self->private_impl.f_mcu_blocks_mx_mul[v_mcb])) * ((uint64_t)(a_mx))) + (((uint64_t)(self->private_impl.f_mcu_blocks_my_mul[v_mcb])) * ((uint64_t)(a_my))));
          if (v_offset <= ((uint64_t)(a_workbuf.len))) {
            wuffs_jpeg__decoder__decode_idct(self, wuffs_base__slice_u8__subslice_i(a_workbuf, v_offset), v_stride, ((uint32_t)(self->private_impl.f_components_tq[v_csel])));
          }
        } else if (self->private_impl.f_num_components == 1u) {
          wuffs_jpeg__decoder__decode_idct(self, wuffs_base__make_slice_u8(self->private_data.f_swizzle_immediately_buffer, 64), 8u, ((uint32_t)(self->private_impl.f_components_tq[v_csel])));
          self->private_impl.f_swizzle_immediately_status = wuffs_jpeg__decoder__swizzle_gray(self,
              a_dst,
              wuffs_base__make_slice_u8(self->private_data.f_swizzle_immediately_buffer, 64),
              ((a_mx + 0u) * 8u),
              ((a_mx + 1u) * 8u),
              ((a_my + 0u) * 8u),
              ((a_my + 1u) * 8u),
              8u);
          if ( ! wuffs_base__status__is_ok(&self->private_impl.f_swizzle_immediately_status)) {
            v_ret = 3u;
            goto label__goto_done__break;
          }
          break;
        } else {
          v_csel = self->private_impl.f_scan_comps_cselector[self->private_impl.f_mcu_blocks_sselector[v_mcb]];
          v_stride = (8u * ((uint64_t)(self->private_impl.f_components_h[v_csel])));
          wuffs_jpeg__decoder__decode_idct(self, wuffs_base__make_slice_u8_ij(self->private_data.f_swizzle_immediately_buffer, self->private_impl.f_swizzle_immediately_b_offsets[v_mcb], 640), v_stride, ((uint32_t)(self->private_impl.f_components_tq[v_csel])));
          if (self->private_impl.f_mcu_current_block < self->private_impl.f_mcu_num_blocks) {
            continue;
          }
          self->private_impl.f_swizzle_immediately_status = wuffs_jpeg__decoder__swizzle_colorful(self,
              a_dst,
              wuffs_base__utility__empty_slice_u8(),
              ((a_mx + 0u) * 8u * ((uint32_t)(self->private_impl.f_max_incl_components_h))),
              ((a_mx + 1u) * 8u * ((uint32_t)(self->private_impl.f_max_incl_components_h))),
              ((a_my + 0u) * 8u * ((uint32_t)(self->private_impl.f_max_incl_components_v))),
              ((a_my + 1u) * 8u * ((uint32_t)(self->private_impl.f_max_incl_components_v))));
          if ( ! wuffs_base__status__is_ok(&self->private_impl.f_swizzle_immediately_status)) {
            v_ret = 3u;
            goto label__goto_done__break;
          }
          break;
        }
      }
      self->private_impl.f_mcu_current_block = 0u;
    } while (0);
    label__goto_done__break:;
    v_pos = ((uint32_t)(wuffs_base__u64__sat_add((v_r ? v_r->meta.pos : 0), ((uint64_t)(iop_v_r - io0_v_r)))));
    if (v_pos > self->private_impl.f_bitstream_wi) {
      v_ret = 2u;
    } else {
      self->private_impl.f_bitstream_ri = v_pos;
    }
    v_r = o_0_v_r;
    iop_v_r = o_0_iop_v_r;
    io0_v_r = o_0_io0_v_r;
    io1_v_r = o_0_io1_v_r;
    io2_v_r = o_0_io2_v_r;
  }
  self->private_impl.f_bitstream_bits = v_bits;
  self->private_impl.f_bitstream_n_bits = v_n_bits;
  return v_ret;
}

// -------- func jpeg.decoder.decode_mcu_progressive_ac_high_bits

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu_progressive_ac_high_bits(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my) {
  uint32_t v_ret = 0;
  uint64_t v_bits = 0;
  uint32_t v_n_bits = 0;
  wuffs_base__io_buffer u_r = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_r = &u_r;
  const uint8_t* iop_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io0_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint32_t v_pos = 0;
  const uint16_t* v_ac_huff_table_fast = NULL;
  uint8_t v_ac_h = 0;
  uint32_t v_ac_symbol = 0;
  uint32_t v_ac_ht_fast = 0;
  uint32_t v_ac_bl = 0;
  uint32_t v_ac_code = 0;
  uint32_t v_ac_blm1 = 0;
  uint32_t v_ac_ht_slow = 0;
  uint16_t v_ac_value = 0;
  uint16_t v_ac_extend = 0;
  uint32_t v_ac_rrrr = 0;
  uint32_t v_ac_ssss = 0;
  uint32_t v_z = 0;

  if (self->private_impl.f_eob_run > 0u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
    self->private_impl.f_eob_run -= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    return 0u;
  }
  v_bits = self->private_impl.f_bitstream_bits;
  v_n_bits = self->private_impl.f_bitstream_n_bits;
  if (self->private_impl.f_bitstream_ri > self->private_impl.f_bitstream_wi) {
    return 2u;
  }
  {
    wuffs_base__io_buffer* o_0_v_r = v_r;
    const uint8_t* o_0_iop_v_r = iop_v_r;
    const uint8_t* o_0_io0_v_r = io0_v_r;
    const uint8_t* o_0_io1_v_r = io1_v_r;
    const uint8_t* o_0_io2_v_r = io2_v_r;
    v_r = wuffs_private_impl__io_reader__set(
        &u_r,
        &iop_v_r,
        &io0_v_r,
        &io1_v_r,
        &io2_v_r,
        wuffs_base__make_slice_u8_ij(self->private_data.f_bitstream_buffer,
        self->private_impl.f_bitstream_ri,
        self->private_impl.f_bitstream_wi),
        ((uint64_t)(self->private_impl.f_bitstream_ri)));
    do {
      do {
        if (((uint64_t)(io2_v_r - iop_v_r)) < 264u) {
          v_ret = 1u;
          goto label__goto_done__break;
        }
        if (v_n_bits < 16u) {
          v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
        }
        v_z = self->private_impl.f_mcu_zig_index;
        self->private_impl.f_mcu_zig_index = 0u;
        v_ac_h = self->private_impl.f_mcu_blocks_ac_hselector[0u];
        v_ac_huff_table_fast = &self->private_impl.f_huff_tables_fast[v_ac_h][0u];
        while (v_z <= ((uint32_t)(self->private_impl.f_scan_se))) {
          v_ac_ht_fast = ((uint32_t)(v_ac_huff_table_fast[(v_bits >> 56u)]));
          if (((uint64_t)(io2_v_r - iop_v_r)) < 8u) {
            v_ret = 2u;
            goto label__goto_done__break;
          }
          v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
          iop_v_r += ((63u - (v_n_bits & 63u)) >> 3u);
          v_n_bits |= 56u;
          v_ac_bl = (v_ac_ht_fast >> 8u);
          if (v_n_bits >= v_ac_bl) {
            v_ac_symbol = (255u & v_ac_ht_fast);
            v_bits <<= (v_ac_bl & 63u);
            v_n_bits -= v_ac_bl;
          } else {
            v_ac_code = ((uint32_t)((v_bits >> 55u)));
            v_ac_blm1 = 8u;
            v_bits <<= 9u;
            v_n_bits -= 9u;
            while (true) {
              v_ac_ht_slow = self->private_impl.f_huff_tables_slow[v_ac_h][v_ac_blm1];
              if (v_ac_code < (v_ac_ht_slow >> 8u)) {
                v_ac_symbol = ((uint32_t)(self->private_impl.f_huff_tables_symbols[v_ac_h][(255u & ((uint32_t)(v_ac_code + v_ac_ht_slow)))]));
                break;
              }
              v_ac_code = (((uint32_t)(v_ac_code << 1u)) | ((uint32_t)((v_bits >> 63u))));
              v_bits <<= 1u;
              v_n_bits -= 1u;
              v_ac_blm1 = ((v_ac_blm1 + 1u) & 15u);
              if (v_ac_blm1 == 0u) {
                v_ac_symbol = 0u;
                break;
              }
            }
          }
          v_ac_rrrr = (v_ac_symbol >> 4u);
          v_z += (v_ac_rrrr + 1u);
          v_ac_ssss = (v_ac_symbol & 15u);
          v_ac_extend = WUFFS_JPEG__EXTEND[v_ac_ssss];
          if (v_ac_ssss > 0u) {
            v_ac_value = ((uint16_t)((v_bits >> (64u - v_ac_ssss))));
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
            v_ac_value += ((uint16_t)(v_ac_extend & ((uint16_t)(((uint16_t)(wuffs_base__utility__sign_extend_rshift_u64(v_bits, 63u))) ^ 65535u))));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
            v_bits <<= v_ac_ssss;
            v_n_bits -= v_ac_ssss;
            self->private_data.f_mcu_blocks[0u][WUFFS_JPEG__UNZIG[v_z]] = ((uint16_t)(((uint16_t)(v_ac_value << self->private_impl.f_scan_al))));
          } else if (v_ac_rrrr < 15u) {
            self->private_impl.f_eob_run = ((uint16_t)(((uint16_t)(((uint16_t)(((uint16_t)(1u)) << v_ac_rrrr)) - 1u))));
            if (v_ac_rrrr > 0u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
              self->private_impl.f_eob_run += ((uint16_t)((v_bits >> (64u - v_ac_rrrr))));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
              v_bits <<= v_ac_rrrr;
              v_n_bits -= v_ac_rrrr;
            }
            break;
          }
        }
      } while (0);
    } while (0);
    label__goto_done__break:;
    v_pos = ((uint32_t)(wuffs_base__u64__sat_add((v_r ? v_r->meta.pos : 0), ((uint64_t)(iop_v_r - io0_v_r)))));
    if (v_pos > self->private_impl.f_bitstream_wi) {
      v_ret = 2u;
    } else {
      self->private_impl.f_bitstream_ri = v_pos;
    }
    v_r = o_0_v_r;
    iop_v_r = o_0_iop_v_r;
    io0_v_r = o_0_io0_v_r;
    io1_v_r = o_0_io1_v_r;
    io2_v_r = o_0_io2_v_r;
  }
  self->private_impl.f_bitstream_bits = v_bits;
  self->private_impl.f_bitstream_n_bits = v_n_bits;
  return v_ret;
}

// -------- func jpeg.decoder.decode_mcu_progressive_ac_low_bit

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu_progressive_ac_low_bit(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my) {
  uint32_t v_ret = 0;
  uint64_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint16_t v_one_lshift_scan_al = 0;
  wuffs_base__io_buffer u_r = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_r = &u_r;
  const uint8_t* iop_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io0_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint32_t v_pos = 0;
  const uint16_t* v_ac_huff_table_fast = NULL;
  uint8_t v_ac_h = 0;
  uint32_t v_ac_symbol = 0;
  uint32_t v_ac_ht_fast = 0;
  uint32_t v_ac_bl = 0;
  uint32_t v_ac_code = 0;
  uint32_t v_ac_blm1 = 0;
  uint32_t v_ac_ht_slow = 0;
  uint16_t v_ac_value = 0;
  uint32_t v_ac_rrrr = 0;
  uint32_t v_ac_ssss = 0;
  uint8_t v_unzig = 0;
  bool v_bit = false;

  v_bits = self->private_impl.f_bitstream_bits;
  v_n_bits = self->private_impl.f_bitstream_n_bits;
  v_one_lshift_scan_al = ((uint16_t)(((uint16_t)(1u)) << self->private_impl.f_scan_al));
  if (self->private_impl.f_bitstream_ri > self->private_impl.f_bitstream_wi) {
    return 2u;
  }
  {
    wuffs_base__io_buffer* o_0_v_r = v_r;
    const uint8_t* o_0_iop_v_r = iop_v_r;
    const uint8_t* o_0_io0_v_r = io0_v_r;
    const uint8_t* o_0_io1_v_r = io1_v_r;
    const uint8_t* o_0_io2_v_r = io2_v_r;
    v_r = wuffs_private_impl__io_reader__set(
        &u_r,
        &iop_v_r,
        &io0_v_r,
        &io1_v_r,
        &io2_v_r,
        wuffs_base__make_slice_u8_ij(self->private_data.f_bitstream_buffer,
        self->private_impl.f_bitstream_ri,
        self->private_impl.f_bitstream_wi),
        ((uint64_t)(self->private_impl.f_bitstream_ri)));
    do {
      do {
        if (((uint64_t)(io2_v_r - iop_v_r)) < 264u) {
          v_ret = 1u;
          goto label__goto_done__break;
        }
        while (true) {
          if (self->private_impl.f_eob_run > 0u) {
            break;
          }
          v_ac_h = self->private_impl.f_mcu_blocks_ac_hselector[0u];
          v_ac_huff_table_fast = &self->private_impl.f_huff_tables_fast[v_ac_h][0u];
          while (true) {
            if (((uint64_t)(io2_v_r - iop_v_r)) < 8u) {
              v_ret = 2u;
              goto label__goto_done__break;
            }
            v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
            iop_v_r += ((63u - (v_n_bits & 63u)) >> 3u);
            v_n_bits |= 56u;
            v_ac_ht_fast = ((uint32_t)(v_ac_huff_table_fast[(v_bits >> 56u)]));
            v_ac_bl = (v_ac_ht_fast >> 8u);
            if (v_n_bits >= v_ac_bl) {
              v_ac_symbol = (255u & v_ac_ht_fast);
              v_bits <<= (v_ac_bl & 63u);
              v_n_bits -= v_ac_bl;
            } else {
              v_ac_code = ((uint32_t)((v_bits >> 55u)));
              v_ac_blm1 = 8u;
              v_bits <<= 9u;
              v_n_bits -= 9u;
              while (true) {
                v_ac_ht_slow = self->private_impl.f_huff_tables_slow[v_ac_h][v_ac_blm1];
                if (v_ac_code < (v_ac_ht_slow >> 8u)) {
                  v_ac_symbol = ((uint32_t)(self->private_impl.f_huff_tables_symbols[v_ac_h][(255u & ((uint32_t)(v_ac_code + v_ac_ht_slow)))]));
                  break;
                }
                v_ac_code = (((uint32_t)(v_ac_code << 1u)) | ((uint32_t)((v_bits >> 63u))));
                v_bits <<= 1u;
                v_n_bits -= 1u;
                v_ac_blm1 = ((v_ac_blm1 + 1u) & 15u);
                if (v_ac_blm1 == 0u) {
                  v_ac_symbol = 0u;
                  break;
                }
              }
            }
            v_ac_rrrr = (v_ac_symbol >> 4u);
            v_ac_ssss = (v_ac_symbol & 15u);
            v_ac_value = 0u;
            if (v_ac_ssss > 0u) {
              v_ac_value = ((uint16_t)(((uint16_t)(1u)) << self->private_impl.f_scan_al));
              if ((v_bits >> 63u) == 0u) {
                v_ac_value = ((uint16_t)(((uint16_t)(65535u)) << self->private_impl.f_scan_al));
              }
              v_bits <<= 1u;
              v_n_bits -= 1u;
            } else if (v_ac_rrrr < 15u) {
              self->private_impl.f_eob_run = ((uint16_t)(((uint16_t)(1u)) << v_ac_rrrr));
              if (v_ac_rrrr > 0u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
                self->private_impl.f_eob_run += ((uint16_t)((v_bits >> (64u - v_ac_rrrr))));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
                v_bits <<= v_ac_rrrr;
                v_n_bits -= v_ac_rrrr;
              }
              goto label__goto_do_eob__break;
            }
            while (true) {
              v_unzig = WUFFS_JPEG__UNZIG[(1u + self->private_impl.f_mcu_zig_index)];
              if (self->private_data.f_mcu_blocks[0u][v_unzig] != 0u) {
                if (v_n_bits == 0u) {
                  if (((uint64_t)(io2_v_r - iop_v_r)) < 8u) {
                    v_ret = 2u;
                    goto label__goto_done__break;
                  }
                  v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
                  iop_v_r += ((63u - (v_n_bits & 63u)) >> 3u);
                  v_n_bits |= 56u;
                }
                v_bit = ((v_bits >> 63u) > 0u);
                v_bits <<= 1u;
                v_n_bits -= 1u;
                if (v_bit) {
                  if (self->private_data.f_mcu_blocks[0u][v_unzig] < 32768u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
                    self->private_data.f_mcu_blocks[0u][v_unzig] += v_one_lshift_scan_al;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
                  } else {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
                    self->private_data.f_mcu_blocks[0u][v_unzig] -= v_one_lshift_scan_al;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
                  }
                }
              } else if (v_ac_rrrr <= 0u) {
                break;
              } else {
                v_ac_rrrr -= 1u;
              }
              if (self->private_impl.f_mcu_zig_index >= ((uint32_t)(self->private_impl.f_scan_se))) {
                break;
              }
              self->private_impl.f_mcu_zig_index += 1u;
            }
            if (v_ac_value != 0u) {
              self->private_data.f_mcu_blocks[0u][WUFFS_JPEG__UNZIG[(1u + self->private_impl.f_mcu_zig_index)]] = v_ac_value;
            }
            if (self->private_impl.f_mcu_zig_index >= ((uint32_t)(self->private_impl.f_scan_se))) {
              break;
            }
            self->private_impl.f_mcu_zig_index += 1u;
          }
          goto label__block__break;
        }
        label__goto_do_eob__break:;
        if (self->private_impl.f_eob_run <= 0u) {
          v_ret = 2u;
          goto label__goto_done__break;
        }
        while (true) {
          v_unzig = WUFFS_JPEG__UNZIG[(1u + self->private_impl.f_mcu_zig_index)];
          if (self->private_data.f_mcu_blocks[0u][v_unzig] != 0u) {
            if (v_n_bits == 0u) {
              if (((uint64_t)(io2_v_r - iop_v_r)) < 8u) {
                v_ret = 2u;
                goto label__goto_done__break;
              }
              v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
              iop_v_r += ((63u - (v_n_bits & 63u)) >> 3u);
              v_n_bits |= 56u;
            }
            v_bit = ((v_bits >> 63u) > 0u);
            v_bits <<= 1u;
            v_n_bits -= 1u;
            if (v_bit) {
              if (self->private_data.f_mcu_blocks[0u][v_unzig] < 32768u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
                self->private_data.f_mcu_blocks[0u][v_unzig] += v_one_lshift_scan_al;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
              } else {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
                self->private_data.f_mcu_blocks[0u][v_unzig] -= v_one_lshift_scan_al;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
              }
            }
          }
          if (self->private_impl.f_mcu_zig_index >= ((uint32_t)(self->private_impl.f_scan_se))) {
            break;
          }
          self->private_impl.f_mcu_zig_index += 1u;
        }
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        self->private_impl.f_eob_run -= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } while (0);
      label__block__break:;
    } while (0);
    label__goto_done__break:;
    v_pos = ((uint32_t)(wuffs_base__u64__sat_add((v_r ? v_r->meta.pos : 0), ((uint64_t)(iop_v_r - io0_v_r)))));
    if (v_pos > self->private_impl.f_bitstream_wi) {
      v_ret = 2u;
    } else {
      self->private_impl.f_bitstream_ri = v_pos;
    }
    v_r = o_0_v_r;
    iop_v_r = o_0_iop_v_r;
    io0_v_r = o_0_io0_v_r;
    io1_v_r = o_0_io1_v_r;
    io2_v_r = o_0_io2_v_r;
  }
  self->private_impl.f_bitstream_bits = v_bits;
  self->private_impl.f_bitstream_n_bits = v_n_bits;
  return v_ret;
}

// -------- func jpeg.decoder.decode_mcu_progressive_dc_high_bits

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu_progressive_dc_high_bits(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my) {
  uint32_t v_ret = 0;
  uint64_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint8_t v_csel = 0;
  wuffs_base__io_buffer u_r = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_r = &u_r;
  const uint8_t* iop_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io0_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint32_t v_pos = 0;
  uint8_t v_dc_h = 0;
  uint32_t v_dc_symbol = 0;
  uint32_t v_dc_ht_fast = 0;
  uint32_t v_dc_bl = 0;
  uint32_t v_dc_code = 0;
  uint32_t v_dc_blm1 = 0;
  uint32_t v_dc_ht_slow = 0;
  uint16_t v_dc_value = 0;
  uint16_t v_dc_extend = 0;

  v_bits = self->private_impl.f_bitstream_bits;
  v_n_bits = self->private_impl.f_bitstream_n_bits;
  if (self->private_impl.f_bitstream_ri > self->private_impl.f_bitstream_wi) {
    return 2u;
  }
  {
    wuffs_base__io_buffer* o_0_v_r = v_r;
    const uint8_t* o_0_iop_v_r = iop_v_r;
    const uint8_t* o_0_io0_v_r = io0_v_r;
    const uint8_t* o_0_io1_v_r = io1_v_r;
    const uint8_t* o_0_io2_v_r = io2_v_r;
    v_r = wuffs_private_impl__io_reader__set(
        &u_r,
        &iop_v_r,
        &io0_v_r,
        &io1_v_r,
        &io2_v_r,
        wuffs_base__make_slice_u8_ij(self->private_data.f_bitstream_buffer,
        self->private_impl.f_bitstream_ri,
        self->private_impl.f_bitstream_wi),
        ((uint64_t)(self->private_impl.f_bitstream_ri)));
    do {
      while (self->private_impl.f_mcu_current_block < self->private_impl.f_mcu_num_blocks) {
        if (((uint64_t)(io2_v_r - iop_v_r)) < 264u) {
          v_ret = 1u;
          goto label__goto_done__break;
        }
        do {
          if (((uint64_t)(io2_v_r - iop_v_r)) < 8u) {
            v_ret = 2u;
            goto label__goto_done__break;
          }
          v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
          iop_v_r += ((63u - (v_n_bits & 63u)) >> 3u);
          v_n_bits |= 56u;
          v_dc_h = self->private_impl.f_mcu_blocks_dc_hselector[self->private_impl.f_mcu_current_block];
          v_dc_ht_fast = ((uint32_t)(self->private_impl.f_huff_tables_fast[v_dc_h][(v_bits >> 56u)]));
          v_dc_bl = (v_dc_ht_fast >> 8u);
          if (v_n_bits >= v_dc_bl) {
            v_dc_symbol = (15u & v_dc_ht_fast);
            v_dc_extend = WUFFS_JPEG__EXTEND[v_dc_symbol];
            v_bits <<= (v_dc_bl & 63u);
            v_n_bits -= v_dc_bl;
          } else {
            v_dc_code = ((uint32_t)((v_bits >> 55u)));
            v_dc_blm1 = 8u;
            v_bits <<= 9u;
            v_n_bits -= 9u;
            while (true) {
              v_dc_ht_slow = self->private_impl.f_huff_tables_slow[v_dc_h][v_dc_blm1];
              if (v_dc_code < (v_dc_ht_slow >> 8u)) {
                v_dc_symbol = (15u & ((uint32_t)(self->private_impl.f_huff_tables_symbols[v_dc_h][(255u & ((uint32_t)(v_dc_code + v_dc_ht_slow)))])));
                v_dc_extend = WUFFS_JPEG__EXTEND[v_dc_symbol];
                break;
              }
              v_dc_code = (((uint32_t)(v_dc_code << 1u)) | ((uint32_t)((v_bits >> 63u))));
              v_bits <<= 1u;
              v_n_bits -= 1u;
              v_dc_blm1 = ((v_dc_blm1 + 1u) & 15u);
              if (v_dc_blm1 == 0u) {
                v_dc_symbol = 0u;
                v_dc_extend = WUFFS_JPEG__EXTEND[v_dc_symbol];
                break;
              }
            }
          }
          v_dc_value = ((uint16_t)(((v_bits >> 32u) >> (32u - v_dc_symbol))));
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          v_dc_value += ((uint16_t)(v_dc_extend & ((uint16_t)(((uint16_t)(wuffs_base__utility__sign_extend_rshift_u64(v_bits, 63u))) ^ 65535u))));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
          v_bits <<= v_dc_symbol;
          v_n_bits -= v_dc_symbol;
          v_csel = self->private_impl.f_scan_comps_cselector[self->private_impl.f_mcu_blocks_sselector[self->private_impl.f_mcu_current_block]];
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          self->private_impl.f_mcu_previous_dc_values[v_csel] += v_dc_value;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
          self->private_data.f_mcu_blocks[self->private_impl.f_mcu_current_block][0u] = ((uint16_t)(self->private_impl.f_mcu_previous_dc_values[v_csel] << self->private_impl.f_scan_al));
        } while (0);
        self->private_impl.f_mcu_current_block += 1u;
      }
      self->private_impl.f_mcu_current_block = 0u;
    } while (0);
    label__goto_done__break:;
    v_pos = ((uint32_t)(wuffs_base__u64__sat_add((v_r ? v_r->meta.pos : 0), ((uint64_t)(iop_v_r - io0_v_r)))));
    if (v_pos > self->private_impl.f_bitstream_wi) {
      v_ret = 2u;
    } else {
      self->private_impl.f_bitstream_ri = v_pos;
    }
    v_r = o_0_v_r;
    iop_v_r = o_0_iop_v_r;
    io0_v_r = o_0_io0_v_r;
    io1_v_r = o_0_io1_v_r;
    io2_v_r = o_0_io2_v_r;
  }
  self->private_impl.f_bitstream_bits = v_bits;
  self->private_impl.f_bitstream_n_bits = v_n_bits;
  return v_ret;
}

// -------- func jpeg.decoder.decode_mcu_progressive_dc_low_bit

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_jpeg__decoder__decode_mcu_progressive_dc_low_bit(
    wuffs_jpeg__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf,
    uint32_t a_mx,
    uint32_t a_my) {
  uint32_t v_ret = 0;
  uint64_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint16_t v_one_lshift_scan_al = 0;
  wuffs_base__io_buffer u_r = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_r = &u_r;
  const uint8_t* iop_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io0_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint32_t v_pos = 0;

  v_bits = self->private_impl.f_bitstream_bits;
  v_n_bits = self->private_impl.f_bitstream_n_bits;
  v_one_lshift_scan_al = ((uint16_t)(((uint16_t)(1u)) << self->private_impl.f_scan_al));
  if (self->private_impl.f_bitstream_ri > self->private_impl.f_bitstream_wi) {
    return 2u;
  }
  {
    wuffs_base__io_buffer* o_0_v_r = v_r;
    const uint8_t* o_0_iop_v_r = iop_v_r;
    const uint8_t* o_0_io0_v_r = io0_v_r;
    const uint8_t* o_0_io1_v_r = io1_v_r;
    const uint8_t* o_0_io2_v_r = io2_v_r;
    v_r = wuffs_private_impl__io_reader__set(
        &u_r,
        &iop_v_r,
        &io0_v_r,
        &io1_v_r,
        &io2_v_r,
        wuffs_base__make_slice_u8_ij(self->private_data.f_bitstream_buffer,
        self->private_impl.f_bitstream_ri,
        self->private_impl.f_bitstream_wi),
        ((uint64_t)(self->private_impl.f_bitstream_ri)));
    do {
      while (self->private_impl.f_mcu_current_block < self->private_impl.f_mcu_num_blocks) {
        if (((uint64_t)(io2_v_r - iop_v_r)) < 264u) {
          v_ret = 1u;
          goto label__goto_done__break;
        }
        do {
          if (((uint64_t)(io2_v_r - iop_v_r)) < 8u) {
            v_ret = 2u;
            goto label__goto_done__break;
          }
          v_bits |= (wuffs_base__peek_u64be__no_bounds_check(iop_v_r) >> (v_n_bits & 63u));
          iop_v_r += ((63u - (v_n_bits & 63u)) >> 3u);
          v_n_bits |= 56u;
          if ((v_bits >> 63u) != 0u) {
            self->private_data.f_mcu_blocks[self->private_impl.f_mcu_current_block][0u] |= v_one_lshift_scan_al;
          }
          v_bits <<= 1u;
          v_n_bits -= 1u;
        } while (0);
        self->private_impl.f_mcu_current_block += 1u;
      }
      self->private_impl.f_mcu_current_block = 0u;
    } while (0);
    label__goto_done__break:;
    v_pos = ((uint32_t)(wuffs_base__u64__sat_add((v_r ? v_r->meta.pos : 0), ((uint64_t)(iop_v_r - io0_v_r)))));
    if (v_pos > self->private_impl.f_bitstream_wi) {
      v_ret = 2u;
    } else {
      self->private_impl.f_bitstream_ri = v_pos;
    }
    v_r = o_0_v_r;
    iop_v_r = o_0_iop_v_r;
    io0_v_r = o_0_io0_v_r;
    io1_v_r = o_0_io1_v_r;
    io2_v_r = o_0_io2_v_r;
  }
  self->private_impl.f_bitstream_bits = v_bits;
  self->private_impl.f_bitstream_n_bits = v_n_bits;
  return v_ret;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JPEG)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JSON)

// ---------------- Status Codes Implementations

const char wuffs_json__error__bad_c0_control_code[] = "#json: bad C0 control code";
const char wuffs_json__error__bad_utf_8[] = "#json: bad UTF-8";
const char wuffs_json__error__bad_backslash_escape[] = "#json: bad backslash-escape";
const char wuffs_json__error__bad_input[] = "#json: bad input";
const char wuffs_json__error__bad_new_line_in_a_string[] = "#json: bad new-line in a string";
const char wuffs_json__error__bad_quirk_combination[] = "#json: bad quirk combination";
const char wuffs_json__error__unsupported_number_length[] = "#json: unsupported number length";
const char wuffs_json__error__unsupported_recursion_depth[] = "#json: unsupported recursion depth";
const char wuffs_json__error__internal_error_inconsistent_i_o[] = "#json: internal error: inconsistent I/O";

// ---------------- Private Consts

#define WUFFS_JSON__DECODER_NUMBER_LENGTH_MAX_INCL 99u

static const uint8_t
WUFFS_JSON__LUT_BACKSLASHES[256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 3u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 162u, 0u, 0u, 0u, 0u, 5u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 175u,
  7u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 4u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 220u, 0u, 0u, 0u,
  0u, 1u, 136u, 0u, 0u, 2u, 140u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 138u, 0u,
  0u, 0u, 141u, 0u, 137u, 0u, 6u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
};

static const uint8_t
WUFFS_JSON__LUT_QUIRKY_BACKSLASHES_QUIRKS[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 1u, 3u, 4u, 5u, 6u, 7u, 10u,
};

static const uint8_t
WUFFS_JSON__LUT_QUIRKY_BACKSLASHES_CHARS[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 7u, 27u, 10u, 63u, 39u, 11u, 0u,
};

static const uint8_t
WUFFS_JSON__LUT_CHARS[256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  128u, 129u, 130u, 131u, 132u, 133u, 134u, 135u,
  136u, 137u, 138u, 139u, 140u, 141u, 142u, 143u,
  144u, 145u, 146u, 147u, 148u, 149u, 150u, 151u,
  152u, 153u, 154u, 155u, 156u, 157u, 158u, 159u,
  0u, 0u, 1u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 2u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u,
  16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u,
  16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u,
  16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u,
  16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u,
  16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u,
  16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u,
  16u, 16u, 16u, 16u, 16u, 16u, 16u, 16u,
  32u, 32u, 3u, 3u, 3u, 3u, 3u, 3u,
  3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u,
  3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u,
  3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u,
  4u, 4u, 4u, 4u, 4u, 4u, 4u, 4u,
  4u, 4u, 4u, 4u, 4u, 4u, 4u, 4u,
  5u, 5u, 5u, 5u, 5u, 32u, 32u, 32u,
  32u, 32u, 32u, 32u, 32u, 32u, 32u, 32u,
};

#define WUFFS_JSON__CLASS_WHITESPACE 0u

#define WUFFS_JSON__CLASS_STRING 1u

#define WUFFS_JSON__CLASS_COMMA 2u

#define WUFFS_JSON__CLASS_COLON 3u

#define WUFFS_JSON__CLASS_NUMBER 4u

#define WUFFS_JSON__CLASS_OPEN_CURLY_BRACE 5u

#define WUFFS_JSON__CLASS_CLOSE_CURLY_BRACE 6u

#define WUFFS_JSON__CLASS_OPEN_SQUARE_BRACKET 7u

#define WUFFS_JSON__CLASS_CLOSE_SQUARE_BRACKET 8u

#define WUFFS_JSON__CLASS_FALSE 9u

#define WUFFS_JSON__CLASS_TRUE 10u

#define WUFFS_JSON__CLASS_NULL_NAN_INF 11u

#define WUFFS_JSON__CLASS_COMMENT 12u

#define WUFFS_JSON__EXPECT_VALUE 7858u

#define WUFFS_JSON__EXPECT_NON_STRING_VALUE 7856u

#define WUFFS_JSON__EXPECT_STRING 4098u

#define WUFFS_JSON__EXPECT_COMMA 4100u

#define WUFFS_JSON__EXPECT_COLON 4104u

#define WUFFS_JSON__EXPECT_NUMBER 4112u

#define WUFFS_JSON__EXPECT_CLOSE_CURLY_BRACE 4160u

#define WUFFS_JSON__EXPECT_CLOSE_SQUARE_BRACKET 4352u

static const uint8_t
WUFFS_JSON__LUT_CLASSES[256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 0u, 0u, 15u, 15u, 0u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  0u, 15u, 1u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 11u, 2u, 4u, 15u, 12u,
  4u, 4u, 4u, 4u, 4u, 4u, 4u, 4u,
  4u, 4u, 3u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 11u, 15u, 15u, 15u, 15u, 11u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 7u, 15u, 8u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 9u, 15u,
  15u, 11u, 15u, 15u, 15u, 15u, 11u, 15u,
  15u, 15u, 15u, 15u, 10u, 15u, 15u, 15u,
  15u, 15u, 15u, 5u, 15u, 6u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
  15u, 15u, 15u, 15u, 15u, 15u, 15u, 15u,
};

static const uint8_t
WUFFS_JSON__LUT_DECIMAL_DIGITS[256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  128u, 129u, 130u, 131u, 132u, 133u, 134u, 135u,
  136u, 137u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
};

static const uint8_t
WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  128u, 129u, 130u, 131u, 132u, 133u, 134u, 135u,
  136u, 137u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 138u, 139u, 140u, 141u, 142u, 143u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 138u, 139u, 140u, 141u, 142u, 143u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
};

#define WUFFS_JSON__QUIRKS_BASE 1167656960u

#define WUFFS_JSON__QUIRKS_COUNT 21u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_json__decoder__decode_number(
    wuffs_json__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_json__decoder__decode_digits(
    wuffs_json__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_n);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_json__decoder__decode_leading(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_json__decoder__decode_comment(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_json__decoder__decode_inf_nan(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_json__decoder__decode_trailer(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

// ---------------- VTables

const wuffs_base__token_decoder__func_ptrs
wuffs_json__decoder__func_ptrs_for__wuffs_base__token_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__token_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_json__decoder__decode_tokens),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_json__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_json__decoder__set_quirk),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_json__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_json__decoder__initialize(
    wuffs_json__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__token_decoder.vtable_name =
      wuffs_base__token_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__token_decoder.function_pointers =
      (const void*)(&wuffs_json__decoder__func_ptrs_for__wuffs_base__token_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_json__decoder*
wuffs_json__decoder__alloc(void) {
  wuffs_json__decoder* x =
      (wuffs_json__decoder*)(calloc(1, sizeof(wuffs_json__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_json__decoder__initialize(
      x, sizeof(wuffs_json__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_json__decoder(void) {
  return sizeof(wuffs_json__decoder);
}

// ---------------- Function Implementations

// -------- func json.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_json__decoder__get_quirk(
    const wuffs_json__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  uint32_t v_key = 0;

  if (a_key >= 1167656960u) {
    v_key = (a_key - 1167656960u);
    if (v_key < 21u) {
      if (self->private_impl.f_quirks[v_key]) {
        return 1u;
      }
    }
  }
  return 0u;
}

// -------- func json.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_json__decoder__set_quirk(
    wuffs_json__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (a_key >= 1167656960u) {
    a_key -= 1167656960u;
    if (a_key < 21u) {
      self->private_impl.f_quirks[a_key] = (a_value > 0u);
      return wuffs_base__make_status(NULL);
    }
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func json.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_json__decoder__workbuf_len(
    const wuffs_json__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__empty_range_ii_u64();
}

// -------- func json.decoder.decode_tokens

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_json__decoder__decode_tokens(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_vminor = 0;
  uint32_t v_number_length = 0;
  uint32_t v_number_status = 0;
  uint32_t v_string_length = 0;
  uint32_t v_whitespace_length = 0;
  uint32_t v_depth = 0;
  uint32_t v_stack_byte = 0;
  uint32_t v_stack_bit = 0;
  uint32_t v_match = 0;
  uint32_t v_c32 = 0;
  uint8_t v_c8 = 0;
  uint8_t v_backslash = 0;
  uint8_t v_char = 0;
  uint8_t v_class = 0;
  uint32_t v_multi_byte_utf8 = 0;
  uint8_t v_backslash_x_ok = 0;
  uint8_t v_backslash_x_value = 0;
  uint32_t v_backslash_x_string = 0;
  uint8_t v_uni4_ok = 0;
  uint64_t v_uni4_string = 0;
  uint32_t v_uni4_value = 0;
  uint32_t v_uni4_high_surrogate = 0;
  uint8_t v_uni8_ok = 0;
  uint64_t v_uni8_string = 0;
  uint32_t v_uni8_value = 0;
  uint32_t v_expect = 0;
  uint32_t v_expect_after_value = 0;

  wuffs_base__token* iop_a_dst = NULL;
  wuffs_base__token* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_tokens;
  if (coro_susp_point) {
    v_depth = self->private_data.s_decode_tokens.v_depth;
    v_expect = self->private_data.s_decode_tokens.v_expect;
    v_expect_after_value = self->private_data.s_decode_tokens.v_expect_after_value;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_end_of_data) {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (self->private_impl.f_quirks[18u]) {
      if (self->private_impl.f_quirks[11u] || self->private_impl.f_quirks[12u] || self->private_impl.f_quirks[17u]) {
        status = wuffs_base__make_status(wuffs_json__error__bad_quirk_combination);
        goto exit;
      }
    }
    if (self->private_impl.f_quirks[15u] || self->private_impl.f_quirks[16u]) {
      if (a_dst) {
        a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
      }
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_json__decoder__decode_leading(self, a_dst, a_src);
      if (a_dst) {
        iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
      }
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    }
    v_expect = 7858u;
    label__outer__continue:;
    while (true) {
      while (true) {
        if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_write);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
          goto label__outer__continue;
        }
        v_whitespace_length = 0u;
        v_c8 = 0u;
        v_class = 0u;
        while (true) {
          if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
            if (v_whitespace_length > 0u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(v_whitespace_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              v_whitespace_length = 0u;
            }
            if (a_src && a_src->meta.closed) {
              status = wuffs_base__make_status(wuffs_json__error__bad_input);
              goto exit;
            }
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
            goto label__outer__continue;
          }
          v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          v_class = WUFFS_JSON__LUT_CLASSES[v_c8];
          if (v_class != 0u) {
            break;
          }
          iop_a_src += 1u;
          if (v_whitespace_length >= 65534u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(65535u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            v_whitespace_length = 0u;
            goto label__outer__continue;
          }
          v_whitespace_length += 1u;
        }
        if (v_whitespace_length > 0u) {
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(v_whitespace_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          v_whitespace_length = 0u;
          if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
            goto label__outer__continue;
          }
        }
        if (0u == (v_expect & (((uint32_t)(1u)) << v_class))) {
          status = wuffs_base__make_status(wuffs_json__error__bad_input);
          goto exit;
        }
        if (v_class == 1u) {
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(4194579u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          iop_a_src += 1u;
          label__string_loop_outer__continue:;
          while (true) {
            if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_write);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4);
              continue;
            }
            v_string_length = 0u;
            while (true) {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                if (v_string_length > 0u) {
                  *iop_a_dst++ = wuffs_base__make_token(
                      (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                      (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                      (((uint64_t)(v_string_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                  v_string_length = 0u;
                }
                if (a_src && a_src->meta.closed) {
                  status = wuffs_base__make_status(wuffs_json__error__bad_input);
                  goto exit;
                }
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
                goto label__string_loop_outer__continue;
              }
              while (((uint64_t)(io2_a_src - iop_a_src)) > 4u) {
                v_c32 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
                if (0u != (WUFFS_JSON__LUT_CHARS[(255u & (v_c32 >> 0u))] |
                    WUFFS_JSON__LUT_CHARS[(255u & (v_c32 >> 8u))] |
                    WUFFS_JSON__LUT_CHARS[(255u & (v_c32 >> 16u))] |
                    WUFFS_JSON__LUT_CHARS[(255u & (v_c32 >> 24u))])) {
                  break;
                }
                iop_a_src += 4u;
                if (v_string_length > 65527u) {
                  *iop_a_dst++ = wuffs_base__make_token(
                      (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                      (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                      (((uint64_t)((v_string_length + 4u))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                  v_string_length = 0u;
                  goto label__string_loop_outer__continue;
                }
                v_string_length += 4u;
              }
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              v_char = WUFFS_JSON__LUT_CHARS[v_c8];
              if (v_char == 0u) {
                iop_a_src += 1u;
                if (v_string_length >= 65531u) {
                  *iop_a_dst++ = wuffs_base__make_token(
                      (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                      (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                      (((uint64_t)(65532u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                  v_string_length = 0u;
                  goto label__string_loop_outer__continue;
                }
                v_string_length += 1u;
                continue;
              } else if (v_char == 1u) {
                if (v_string_length != 0u) {
                  *iop_a_dst++ = wuffs_base__make_token(
                      (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                      (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                      (((uint64_t)(v_string_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                  v_string_length = 0u;
                }
                goto label__string_loop_outer__break;
              } else if (v_char == 2u) {
                if (v_string_length > 0u) {
                  *iop_a_dst++ = wuffs_base__make_token(
                      (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                      (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                      (((uint64_t)(v_string_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                  v_string_length = 0u;
                  if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                    goto label__string_loop_outer__continue;
                  }
                }
                if (((uint64_t)(io2_a_src - iop_a_src)) < 2u) {
                  if (a_src && a_src->meta.closed) {
                    status = wuffs_base__make_status(wuffs_json__error__bad_backslash_escape);
                    goto exit;
                  }
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(6);
                  goto label__string_loop_outer__continue;
                }
                v_c8 = ((uint8_t)(((uint16_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src) >> 8u))));
                v_backslash = WUFFS_JSON__LUT_BACKSLASHES[v_c8];
                if (((uint8_t)(v_backslash & 128u)) != 0u) {
                  iop_a_src += 2u;
                  *iop_a_dst++ = wuffs_base__make_token(
                      (((uint64_t)((6291456u | ((uint32_t)(((uint8_t)(v_backslash & 127u))))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                      (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                      (((uint64_t)(2u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                  goto label__string_loop_outer__continue;
                } else if (v_backslash != 0u) {
                  if (self->private_impl.f_quirks[WUFFS_JSON__LUT_QUIRKY_BACKSLASHES_QUIRKS[((uint8_t)(v_backslash & 7u))]]) {
                    iop_a_src += 2u;
                    *iop_a_dst++ = wuffs_base__make_token(
                        (((uint64_t)((6291456u | ((uint32_t)(WUFFS_JSON__LUT_QUIRKY_BACKSLASHES_CHARS[((uint8_t)(v_backslash & 7u))]))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                        (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                        (((uint64_t)(2u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                    goto label__string_loop_outer__continue;
                  }
                } else if (v_c8 == 117u) {
                  if (((uint64_t)(io2_a_src - iop_a_src)) < 6u) {
                    if (a_src && a_src->meta.closed) {
                      status = wuffs_base__make_status(wuffs_json__error__bad_backslash_escape);
                      goto exit;
                    }
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(7);
                    goto label__string_loop_outer__continue;
                  }
                  v_uni4_string = (((uint64_t)(wuffs_base__peek_u48le__no_bounds_check(iop_a_src))) >> 16u);
                  v_uni4_value = 0u;
                  v_uni4_ok = 128u;
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni4_string >> 0u))];
                  v_uni4_ok &= v_c8;
                  v_uni4_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 12u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni4_string >> 8u))];
                  v_uni4_ok &= v_c8;
                  v_uni4_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 8u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni4_string >> 16u))];
                  v_uni4_ok &= v_c8;
                  v_uni4_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 4u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni4_string >> 24u))];
                  v_uni4_ok &= v_c8;
                  v_uni4_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 0u);
                  if (v_uni4_ok == 0u) {
                  } else if ((v_uni4_value < 55296u) || (57343u < v_uni4_value)) {
                    iop_a_src += 6u;
                    *iop_a_dst++ = wuffs_base__make_token(
                        (((uint64_t)((6291456u | v_uni4_value))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                        (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                        (((uint64_t)(6u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                    goto label__string_loop_outer__continue;
                  } else if (v_uni4_value >= 56320u) {
                  } else {
                    if (((uint64_t)(io2_a_src - iop_a_src)) < 12u) {
                      if (a_src && a_src->meta.closed) {
                        if (self->private_impl.f_quirks[20u]) {
                          iop_a_src += 6u;
                          *iop_a_dst++ = wuffs_base__make_token(
                              (((uint64_t)(6356989u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                              (((uint64_t)(6u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                          goto label__string_loop_outer__continue;
                        }
                        status = wuffs_base__make_status(wuffs_json__error__bad_backslash_escape);
                        goto exit;
                      }
                      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(8);
                      goto label__string_loop_outer__continue;
                    }
                    v_uni4_string = (wuffs_base__peek_u64le__no_bounds_check(iop_a_src + 4u) >> 16u);
                    if (((255u & (v_uni4_string >> 0u)) != 92u) || ((255u & (v_uni4_string >> 8u)) != 117u)) {
                      v_uni4_high_surrogate = 0u;
                      v_uni4_value = 0u;
                      v_uni4_ok = 0u;
                    } else {
                      v_uni4_high_surrogate = (65536u + ((v_uni4_value - 55296u) << 10u));
                      v_uni4_value = 0u;
                      v_uni4_ok = 128u;
                      v_uni4_string >>= 16u;
                      v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni4_string >> 0u))];
                      v_uni4_ok &= v_c8;
                      v_uni4_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 12u);
                      v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni4_string >> 8u))];
                      v_uni4_ok &= v_c8;
                      v_uni4_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 8u);
                      v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni4_string >> 16u))];
                      v_uni4_ok &= v_c8;
                      v_uni4_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 4u);
                      v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni4_string >> 24u))];
                      v_uni4_ok &= v_c8;
                      v_uni4_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 0u);
                    }
                    if ((v_uni4_ok != 0u) && (56320u <= v_uni4_value) && (v_uni4_value <= 57343u)) {
                      v_uni4_value -= 56320u;
                      iop_a_src += 12u;
                      *iop_a_dst++ = wuffs_base__make_token(
                          (((uint64_t)((6291456u | v_uni4_high_surrogate | v_uni4_value))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                          (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                          (((uint64_t)(12u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                      goto label__string_loop_outer__continue;
                    }
                  }
                  if (self->private_impl.f_quirks[20u]) {
                    if (((uint64_t)(io2_a_src - iop_a_src)) < 6u) {
                      status = wuffs_base__make_status(wuffs_json__error__internal_error_inconsistent_i_o);
                      goto exit;
                    }
                    iop_a_src += 6u;
                    *iop_a_dst++ = wuffs_base__make_token(
                        (((uint64_t)(6356989u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                        (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                        (((uint64_t)(6u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                    goto label__string_loop_outer__continue;
                  }
                } else if ((v_c8 == 85u) && self->private_impl.f_quirks[2u]) {
                  if (((uint64_t)(io2_a_src - iop_a_src)) < 10u) {
                    if (a_src && a_src->meta.closed) {
                      status = wuffs_base__make_status(wuffs_json__error__bad_backslash_escape);
                      goto exit;
                    }
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(9);
                    goto label__string_loop_outer__continue;
                  }
                  v_uni8_string = wuffs_base__peek_u64le__no_bounds_check(iop_a_src + 2u);
                  v_uni8_value = 0u;
                  v_uni8_ok = 128u;
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni8_string >> 0u))];
                  v_uni8_ok &= v_c8;
                  v_uni8_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 28u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni8_string >> 8u))];
                  v_uni8_ok &= v_c8;
                  v_uni8_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 24u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni8_string >> 16u))];
                  v_uni8_ok &= v_c8;
                  v_uni8_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 20u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni8_string >> 24u))];
                  v_uni8_ok &= v_c8;
                  v_uni8_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 16u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni8_string >> 32u))];
                  v_uni8_ok &= v_c8;
                  v_uni8_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 12u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni8_string >> 40u))];
                  v_uni8_ok &= v_c8;
                  v_uni8_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 8u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni8_string >> 48u))];
                  v_uni8_ok &= v_c8;
                  v_uni8_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 4u);
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_uni8_string >> 56u))];
                  v_uni8_ok &= v_c8;
                  v_uni8_value |= (((uint32_t)(((uint8_t)(v_c8 & 15u)))) << 0u);
                  if (v_uni8_ok == 0u) {
                  } else if ((v_uni8_value < 55296u) || ((57343u < v_uni8_value) && (v_uni8_value <= 1114111u))) {
                    iop_a_src += 10u;
                    *iop_a_dst++ = wuffs_base__make_token(
                        (((uint64_t)((6291456u | (v_uni8_value & 2097151u)))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                        (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                        (((uint64_t)(10u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                    goto label__string_loop_outer__continue;
                  } else if (self->private_impl.f_quirks[20u]) {
                    iop_a_src += 10u;
                    *iop_a_dst++ = wuffs_base__make_token(
                        (((uint64_t)(6356989u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                        (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                        (((uint64_t)(10u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                    goto label__string_loop_outer__continue;
                  }
                } else if ((v_c8 == 120u) && self->private_impl.f_quirks[9u]) {
                  if (((uint64_t)(io2_a_src - iop_a_src)) < 4u) {
                    if (a_src && a_src->meta.closed) {
                      status = wuffs_base__make_status(wuffs_json__error__bad_backslash_escape);
                      goto exit;
                    }
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10);
                    goto label__string_loop_outer__continue;
                  }
                  v_backslash_x_string = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
                  v_backslash_x_ok = 128u;
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_backslash_x_string >> 16u))];
                  v_backslash_x_ok &= v_c8;
                  v_backslash_x_value = ((uint8_t)(((uint8_t)(((uint8_t)(v_c8 & 15u)) << 4u))));
                  v_c8 = WUFFS_JSON__LUT_HEXADECIMAL_DIGITS[(255u & (v_backslash_x_string >> 24u))];
                  v_backslash_x_ok &= v_c8;
                  v_backslash_x_value = ((uint8_t)(((uint8_t)(v_backslash_x_value | ((uint8_t)(v_c8 & 15u))))));
                  if ((v_backslash_x_ok == 0u) || ((v_backslash_x_string & 65535u) != 30812u)) {
                    status = wuffs_base__make_status(wuffs_json__error__bad_backslash_escape);
                    goto exit;
                  }
                  iop_a_src += 4u;
                  *iop_a_dst++ = wuffs_base__make_token(
                      (((uint64_t)((6291456u | ((uint32_t)(v_backslash_x_value))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                      (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                      (((uint64_t)(4u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                  goto label__string_loop_outer__continue;
                }
                status = wuffs_base__make_status(wuffs_json__error__bad_backslash_escape);
                goto exit;
              } else if (v_char == 3u) {
                if (((uint64_t)(io2_a_src - iop_a_src)) < 2u) {
                  if (v_string_length > 0u) {
                    *iop_a_dst++ = wuffs_base__make_token(
                        (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                        (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                        (((uint64_t)(v_string_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                    v_string_length = 0u;
                    if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                      goto label__string_loop_outer__continue;
                    }
                  }
                  if (a_src && a_src->meta.closed) {
                    if (self->private_impl.f_quirks[20u]) {
                      *iop_a_dst++ = wuffs_base__make_token(
                          (((uint64_t)(6356989u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                          (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                          (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                      iop_a_src += 1u;
                      goto label__string_loop_outer__continue;
                    }
                    status = wuffs_base__make_status(wuffs_json__error__bad_utf_8);
                    goto exit;
                  }
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(11);
                  goto label__string_loop_outer__continue;
                }
                v_multi_byte_utf8 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
                if ((v_multi_byte_utf8 & 49152u) == 32768u) {
                  v_multi_byte_utf8 = ((1984u & ((uint32_t)(v_multi_byte_utf8 << 6u))) | (63u & (v_multi_byte_utf8 >> 8u)));
                  iop_a_src += 2u;
                  if (v_string_length >= 65528u) {
                    *iop_a_dst++ = wuffs_base__make_token(
                        (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                        (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                        (((uint64_t)((v_string_length + 2u))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                    v_string_length = 0u;
                    goto label__string_loop_outer__continue;
                  }
                  v_string_length += 2u;
                  continue;
                }
              } else if (v_char == 4u) {
                if (((uint64_t)(io2_a_src - iop_a_src)) < 3u) {
                  if (v_string_length > 0u) {
                    *iop_a_dst++ = wuffs_base__make_token(
                        (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                        (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                        (((uint64_t)(v_string_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                    v_string_length = 0u;
                    if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                      goto label__string_loop_outer__continue;
                    }
                  }
                  if (a_src && a_src->meta.closed) {
                    if (self->private_impl.f_quirks[20u]) {
                      *iop_a_dst++ = wuffs_base__make_token(
                          (((uint64_t)(6356989u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                          (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                          (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                      iop_a_src += 1u;
                      goto label__string_loop_outer__continue;
                    }
                    status = wuffs_base__make_status(wuffs_json__error__bad_utf_8);
                    goto exit;
                  }
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(12);
                  goto label__string_loop_outer__continue;
                }
                v_multi_byte_utf8 = ((uint32_t)(wuffs_base__peek_u24le__no_bounds_check(iop_a_src)));
                if ((v_multi_byte_utf8 & 12632064u) == 8421376u) {
                  v_multi_byte_utf8 = ((61440u & ((uint32_t)(v_multi_byte_utf8 << 12u))) | (4032u & (v_multi_byte_utf8 >> 2u)) | (63u & (v_multi_byte_utf8 >> 16u)));
                  if ((2047u < v_multi_byte_utf8) && ((v_multi_byte_utf8 < 55296u) || (57343u < v_multi_byte_utf8))) {
                    iop_a_src += 3u;
                    if (v_string_length >= 65528u) {
                      *iop_a_dst++ = wuffs_base__make_token(
                          (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                          (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                          (((uint64_t)((v_string_length + 3u))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                      v_string_length = 0u;
                      goto label__string_loop_outer__continue;
                    }
                    v_string_length += 3u;
                    continue;
                  }
                }
              } else if (v_char == 5u) {
                if (((uint64_t)(io2_a_src - iop_a_src)) < 4u) {
                  if (v_string_length > 0u) {
                    *iop_a_dst++ = wuffs_base__make_token(
                        (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                        (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                        (((uint64_t)(v_string_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                    v_string_length = 0u;
                    if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                      goto label__string_loop_outer__continue;
                    }
                  }
                  if (a_src && a_src->meta.closed) {
                    if (self->private_impl.f_quirks[20u]) {
                      *iop_a_dst++ = wuffs_base__make_token(
                          (((uint64_t)(6356989u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                          (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                          (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                      iop_a_src += 1u;
                      goto label__string_loop_outer__continue;
                    }
                    status = wuffs_base__make_status(wuffs_json__error__bad_utf_8);
                    goto exit;
                  }
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(13);
                  goto label__string_loop_outer__continue;
                }
                v_multi_byte_utf8 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
                if ((v_multi_byte_utf8 & 3233857536u) == 2155905024u) {
                  v_multi_byte_utf8 = ((1835008u & ((uint32_t)(v_multi_byte_utf8 << 18u))) |
                      (258048u & ((uint32_t)(v_multi_byte_utf8 << 4u))) |
                      (4032u & (v_multi_byte_utf8 >> 10u)) |
                      (63u & (v_multi_byte_utf8 >> 24u)));
                  if ((65535u < v_multi_byte_utf8) && (v_multi_byte_utf8 <= 1114111u)) {
                    iop_a_src += 4u;
                    if (v_string_length >= 65528u) {
                      *iop_a_dst++ = wuffs_base__make_token(
                          (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                          (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                          (((uint64_t)((v_string_length + 4u))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                      v_string_length = 0u;
                      goto label__string_loop_outer__continue;
                    }
                    v_string_length += 4u;
                    continue;
                  }
                }
              }
              if (v_string_length > 0u) {
                *iop_a_dst++ = wuffs_base__make_token(
                    (((uint64_t)(4194819u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                    (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                    (((uint64_t)(v_string_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                v_string_length = 0u;
                if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                  goto label__string_loop_outer__continue;
                }
              }
              if (((uint8_t)(v_char & 128u)) != 0u) {
                if (self->private_impl.f_quirks[0u]) {
                  *iop_a_dst++ = wuffs_base__make_token(
                      (((uint64_t)((6291456u | ((uint32_t)(((uint8_t)(v_char & 127u))))))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                      (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                      (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                  iop_a_src += 1u;
                  goto label__string_loop_outer__continue;
                }
                if (v_char == 138u) {
                  status = wuffs_base__make_status(wuffs_json__error__bad_new_line_in_a_string);
                  goto exit;
                }
                status = wuffs_base__make_status(wuffs_json__error__bad_c0_control_code);
                goto exit;
              }
              if (self->private_impl.f_quirks[20u]) {
                *iop_a_dst++ = wuffs_base__make_token(
                    (((uint64_t)(6356989u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                    (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                    (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
                iop_a_src += 1u;
                goto label__string_loop_outer__continue;
              }
              status = wuffs_base__make_status(wuffs_json__error__bad_utf_8);
              goto exit;
            }
          }
          label__string_loop_outer__break:;
          while (true) {
            if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              if (a_src && a_src->meta.closed) {
                status = wuffs_base__make_status(wuffs_json__error__bad_input);
                goto exit;
              }
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(14);
              continue;
            }
            if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_write);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(15);
              continue;
            }
            iop_a_src += 1u;
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(4194579u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            break;
          }
          if (0u == (v_expect & (((uint32_t)(1u)) << 4u))) {
            v_expect = 4104u;
            goto label__outer__continue;
          }
          break;
        } else if (v_class == 2u) {
          iop_a_src += 1u;
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          if (0u == (v_expect & (((uint32_t)(1u)) << 8u))) {
            if (self->private_impl.f_quirks[13u]) {
              v_expect = 4162u;
            } else {
              v_expect = 4098u;
            }
          } else {
            if (self->private_impl.f_quirks[13u]) {
              v_expect = 8114u;
            } else {
              v_expect = 7858u;
            }
          }
          goto label__outer__continue;
        } else if (v_class == 3u) {
          iop_a_src += 1u;
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          v_expect = 7858u;
          goto label__outer__continue;
        } else if (v_class == 4u) {
          while (true) {
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            v_number_length = wuffs_json__decoder__decode_number(self, a_src);
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
            v_number_status = (v_number_length >> 8u);
            v_vminor = 10486787u;
            if ((v_number_length & 128u) != 0u) {
              v_vminor = 10486785u;
            }
            v_number_length = (v_number_length & 127u);
            if (v_number_status == 0u) {
              *iop_a_dst++ = wuffs_base__make_token(
                  (((uint64_t)(v_vminor)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                  (((uint64_t)(v_number_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
              break;
            }
            while (v_number_length > 0u) {
              v_number_length -= 1u;
              if (iop_a_src > io1_a_src) {
                iop_a_src--;
              } else {
                status = wuffs_base__make_status(wuffs_json__error__internal_error_inconsistent_i_o);
                goto exit;
              }
            }
            if (v_number_status == 1u) {
              if (self->private_impl.f_quirks[14u]) {
                if (a_dst) {
                  a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
                }
                if (a_src) {
                  a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
                }
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
                status = wuffs_json__decoder__decode_inf_nan(self, a_dst, a_src);
                if (a_dst) {
                  iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
                }
                if (a_src) {
                  iop_a_src = a_src->data.ptr + a_src->meta.ri;
                }
                if (status.repr) {
                  goto suspend;
                }
                break;
              }
              status = wuffs_base__make_status(wuffs_json__error__bad_input);
              goto exit;
            } else if (v_number_status == 2u) {
              status = wuffs_base__make_status(wuffs_json__error__unsupported_number_length);
              goto exit;
            } else {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(17);
              while (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_write);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(18);
              }
            }
          }
          break;
        } else if (v_class == 5u) {
          v_vminor = 2113553u;
          if (v_depth == 0u) {
          } else if (0u != (v_expect_after_value & (((uint32_t)(1u)) << 6u))) {
            v_vminor = 2113601u;
          } else {
            v_vminor = 2113569u;
          }
          if (v_depth >= 1024u) {
            status = wuffs_base__make_status(wuffs_json__error__unsupported_recursion_depth);
            goto exit;
          }
          v_stack_byte = (v_depth / 32u);
          v_stack_bit = (v_depth & 31u);
          self->private_data.f_stack[v_stack_byte] |= (((uint32_t)(1u)) << v_stack_bit);
          v_depth += 1u;
          iop_a_src += 1u;
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(v_vminor)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          v_expect = 4162u;
          v_expect_after_value = 4164u;
          goto label__outer__continue;
        } else if (v_class == 6u) {
          iop_a_src += 1u;
          if (v_depth <= 1u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(2101314u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            goto label__outer__break;
          }
          v_depth -= 1u;
          v_stack_byte = ((v_depth - 1u) / 32u);
          v_stack_bit = ((v_depth - 1u) & 31u);
          if (0u == (self->private_data.f_stack[v_stack_byte] & (((uint32_t)(1u)) << v_stack_bit))) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(2105410u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            v_expect = 4356u;
            v_expect_after_value = 4356u;
          } else {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(2113602u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            v_expect = 4164u;
            v_expect_after_value = 4164u;
          }
          goto label__outer__continue;
        } else if (v_class == 7u) {
          v_vminor = 2105361u;
          if (v_depth == 0u) {
          } else if (0u != (v_expect_after_value & (((uint32_t)(1u)) << 6u))) {
            v_vminor = 2105409u;
          } else {
            v_vminor = 2105377u;
          }
          if (v_depth >= 1024u) {
            status = wuffs_base__make_status(wuffs_json__error__unsupported_recursion_depth);
            goto exit;
          }
          v_stack_byte = (v_depth / 32u);
          v_stack_bit = (v_depth & 31u);
          self->private_data.f_stack[v_stack_byte] &= (4294967295u ^ (((uint32_t)(1u)) << v_stack_bit));
          v_depth += 1u;
          iop_a_src += 1u;
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(v_vminor)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          v_expect = 8114u;
          v_expect_after_value = 4356u;
          goto label__outer__continue;
        } else if (v_class == 8u) {
          iop_a_src += 1u;
          if (v_depth <= 1u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(2101282u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            goto label__outer__break;
          }
          v_depth -= 1u;
          v_stack_byte = ((v_depth - 1u) / 32u);
          v_stack_bit = ((v_depth - 1u) & 31u);
          if (0u == (self->private_data.f_stack[v_stack_byte] & (((uint32_t)(1u)) << v_stack_bit))) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(2105378u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            v_expect = 4356u;
            v_expect_after_value = 4356u;
          } else {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(2113570u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            v_expect = 4164u;
            v_expect_after_value = 4164u;
          }
          goto label__outer__continue;
        } else if (v_class == 9u) {
          v_match = wuffs_private_impl__io_reader__match7(iop_a_src, io2_a_src, a_src, 111546413966853u);
          if (v_match == 0u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(8388612u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(5u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            if (((uint64_t)(io2_a_src - iop_a_src)) < 5u) {
              status = wuffs_base__make_status(wuffs_json__error__internal_error_inconsistent_i_o);
              goto exit;
            }
            iop_a_src += 5u;
            break;
          } else if (v_match == 1u) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(19);
            goto label__outer__continue;
          }
        } else if (v_class == 10u) {
          v_match = wuffs_private_impl__io_reader__match7(iop_a_src, io2_a_src, a_src, 435762131972u);
          if (v_match == 0u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(8388616u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(4u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            if (((uint64_t)(io2_a_src - iop_a_src)) < 4u) {
              status = wuffs_base__make_status(wuffs_json__error__internal_error_inconsistent_i_o);
              goto exit;
            }
            iop_a_src += 4u;
            break;
          } else if (v_match == 1u) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(20);
            goto label__outer__continue;
          }
        } else if (v_class == 11u) {
          v_match = wuffs_private_impl__io_reader__match7(iop_a_src, io2_a_src, a_src, 465676103172u);
          if (v_match == 0u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(8388610u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(4u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            if (((uint64_t)(io2_a_src - iop_a_src)) < 4u) {
              status = wuffs_base__make_status(wuffs_json__error__internal_error_inconsistent_i_o);
              goto exit;
            }
            iop_a_src += 4u;
            break;
          } else if (v_match == 1u) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(21);
            goto label__outer__continue;
          }
          if (self->private_impl.f_quirks[14u]) {
            if (a_dst) {
              a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
            }
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(22);
            status = wuffs_json__decoder__decode_inf_nan(self, a_dst, a_src);
            if (a_dst) {
              iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
            }
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
            if (status.repr) {
              goto suspend;
            }
            break;
          }
        } else if (v_class == 12u) {
          if (self->private_impl.f_quirks[11u] || self->private_impl.f_quirks[12u]) {
            if (a_dst) {
              a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
            }
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(23);
            status = wuffs_json__decoder__decode_comment(self, a_dst, a_src);
            if (a_dst) {
              iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
            }
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
            if (status.repr) {
              goto suspend;
            }
            if (self->private_impl.f_comment_type > 0u) {
              goto label__outer__continue;
            }
          }
        }
        status = wuffs_base__make_status(wuffs_json__error__bad_input);
        goto exit;
      }
      if (v_depth == 0u) {
        break;
      }
      v_expect = v_expect_after_value;
    }
    label__outer__break:;
    if (self->private_impl.f_quirks[17u] || self->private_impl.f_quirks[18u]) {
      if (a_dst) {
        a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
      }
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(24);
      status = wuffs_json__decoder__decode_trailer(self, a_dst, a_src);
      if (a_dst) {
        iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
      }
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    }
    self->private_impl.f_end_of_data = true;

    ok:
    self->private_impl.p_decode_tokens = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_tokens = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;
  self->private_data.s_decode_tokens.v_depth = v_depth;
  self->private_data.s_decode_tokens.v_expect = v_expect;
  self->private_data.s_decode_tokens.v_expect_after_value = v_expect_after_value;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func json.decoder.decode_number

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_json__decoder__decode_number(
    wuffs_json__decoder* self,
    wuffs_base__io_buffer* a_src) {
  uint8_t v_c8 = 0;
  uint32_t v_n = 0;
  uint32_t v_floating_point = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  do {
    v_n = 0u;
    if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
      if ( ! (a_src && a_src->meta.closed)) {
        v_n |= 768u;
      }
      break;
    }
    v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
    if (v_c8 != 45u) {
    } else {
      v_n += 1u;
      iop_a_src += 1u;
      if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
        if ( ! (a_src && a_src->meta.closed)) {
          v_n |= 768u;
        }
        v_n |= 256u;
        break;
      }
      v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
    }
    if (v_c8 == 48u) {
      v_n += 1u;
      iop_a_src += 1u;
    } else {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      v_n = wuffs_json__decoder__decode_digits(self, a_src, v_n);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (v_n > 99u) {
        break;
      }
    }
    if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
      if ( ! (a_src && a_src->meta.closed)) {
        v_n |= 768u;
      }
      break;
    }
    v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
    if (v_c8 != 46u) {
    } else {
      if (v_n >= 99u) {
        v_n |= 512u;
        break;
      }
      v_n += 1u;
      iop_a_src += 1u;
      v_floating_point = 128u;
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      v_n = wuffs_json__decoder__decode_digits(self, a_src, v_n);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (v_n > 99u) {
        break;
      }
      if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
        if ( ! (a_src && a_src->meta.closed)) {
          v_n |= 768u;
        }
        break;
      }
      v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
    }
    if ((v_c8 != 69u) && (v_c8 != 101u)) {
      break;
    }
    if (v_n >= 99u) {
      v_n |= 512u;
      break;
    }
    v_n += 1u;
    iop_a_src += 1u;
    v_floating_point = 128u;
    if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
      if ( ! (a_src && a_src->meta.closed)) {
        v_n |= 768u;
      }
      v_n |= 256u;
      break;
    }
    v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
    if ((v_c8 != 43u) && (v_c8 != 45u)) {
    } else {
      if (v_n >= 99u) {
        v_n |= 512u;
        break;
      }
      v_n += 1u;
      iop_a_src += 1u;
    }
    if (a_src) {
      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
    }
    v_n = wuffs_json__decoder__decode_digits(self, a_src, v_n);
    if (a_src) {
      iop_a_src = a_src->data.ptr + a_src->meta.ri;
    }
  } while (0);
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }
  return (v_n | v_floating_point);
}

// -------- func json.decoder.decode_digits

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_json__decoder__decode_digits(
    wuffs_json__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_n) {
  uint8_t v_c8 = 0;
  uint32_t v_n = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_n = a_n;
  while (true) {
    if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
      if ( ! (a_src && a_src->meta.closed)) {
        v_n |= 768u;
      }
      break;
    }
    v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
    if (0u == WUFFS_JSON__LUT_DECIMAL_DIGITS[v_c8]) {
      break;
    }
    if (v_n >= 99u) {
      v_n |= 512u;
      break;
    }
    v_n += 1u;
    iop_a_src += 1u;
  }
  if (v_n == a_n) {
    v_n |= 256u;
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }
  return v_n;
}

// -------- func json.decoder.decode_leading

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_json__decoder__decode_leading(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_u = 0;

  wuffs_base__token* iop_a_dst = NULL;
  wuffs_base__token* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_leading;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_allow_leading_ars = self->private_impl.f_quirks[15u];
    self->private_impl.f_allow_leading_ubom = self->private_impl.f_quirks[16u];
    while (self->private_impl.f_allow_leading_ars || self->private_impl.f_allow_leading_ubom) {
      if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_write);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
        continue;
      }
      if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
        if (a_src && a_src->meta.closed) {
          break;
        }
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
        continue;
      }
      v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
      if ((v_c8 == 30u) && self->private_impl.f_allow_leading_ars) {
        self->private_impl.f_allow_leading_ars = false;
        iop_a_src += 1u;
        *iop_a_dst++ = wuffs_base__make_token(
            (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
            (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
        continue;
      } else if ((v_c8 == 239u) && self->private_impl.f_allow_leading_ubom) {
        if (((uint64_t)(io2_a_src - iop_a_src)) < 3u) {
          if (a_src && a_src->meta.closed) {
            break;
          }
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
          continue;
        }
        v_u = ((uint32_t)(wuffs_base__peek_u24le__no_bounds_check(iop_a_src)));
        if (v_u == 12565487u) {
          self->private_impl.f_allow_leading_ubom = false;
          iop_a_src += 3u;
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(3u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          continue;
        }
      }
      break;
    }

    ok:
    self->private_impl.p_decode_leading = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_leading = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func json.decoder.decode_comment

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_json__decoder__decode_comment(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint16_t v_c16 = 0;
  uint32_t v_length = 0;

  wuffs_base__token* iop_a_dst = NULL;
  wuffs_base__token* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_comment;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_comment_type = 0u;
    while ((((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) || (((uint64_t)(io2_a_src - iop_a_src)) <= 1u)) {
      if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_write);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
        continue;
      }
      if (a_src && a_src->meta.closed) {
        status = wuffs_base__make_status(NULL);
        goto ok;
      }
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
    }
    v_c16 = wuffs_base__peek_u16le__no_bounds_check(iop_a_src);
    if ((v_c16 == 10799u) && self->private_impl.f_quirks[11u]) {
      iop_a_src += 2u;
      v_length = 2u;
      while (true) {
        if (((uint64_t)(io2_a_src - iop_a_src)) <= 1u) {
          if (v_length > 0u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(2u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                (((uint64_t)(v_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          }
          if (a_src && a_src->meta.closed) {
            status = wuffs_base__make_status(wuffs_json__error__bad_input);
            goto exit;
          }
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
          while (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_write);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4);
          }
          v_length = 0u;
          continue;
        }
        v_c16 = wuffs_base__peek_u16le__no_bounds_check(iop_a_src);
        if (v_c16 == 12074u) {
          iop_a_src += 2u;
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(2u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)((v_length + 2u))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          self->private_impl.f_comment_type = 1u;
          status = wuffs_base__make_status(NULL);
          goto ok;
        }
        iop_a_src += 1u;
        if (v_length >= 65533u) {
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(2u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
              (((uint64_t)((v_length + 1u))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          while (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_write);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
          }
          v_length = 0u;
          continue;
        }
        v_length += 1u;
      }
    } else if ((v_c16 == 12079u) && self->private_impl.f_quirks[12u]) {
      iop_a_src += 2u;
      v_length = 2u;
      while (true) {
        if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
          if (a_src && a_src->meta.closed) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(4u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(v_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            self->private_impl.f_comment_type = 2u;
            status = wuffs_base__make_status(NULL);
            goto ok;
          } else if (v_length > 0u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(4u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
                (((uint64_t)(v_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          }
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(6);
          while (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_write);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(7);
          }
          v_length = 0u;
          continue;
        }
        v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
        if (v_c8 == 10u) {
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(4u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(v_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          self->private_impl.f_comment_type = 2u;
          status = wuffs_base__make_status(NULL);
          goto ok;
        }
        iop_a_src += 1u;
        if (v_length >= 65533u) {
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(4u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)(1u)) << WUFFS_BASE__TOKEN__CONTINUED__SHIFT) |
              (((uint64_t)((v_length + 1u))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          while (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_write);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(8);
          }
          v_length = 0u;
          continue;
        }
        v_length += 1u;
      }
    }

    ok:
    self->private_impl.p_decode_comment = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_comment = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func json.decoder.decode_inf_nan

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_json__decoder__decode_inf_nan(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_c32 = 0;
  uint32_t v_neg = 0;

  wuffs_base__token* iop_a_dst = NULL;
  wuffs_base__token* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_inf_nan;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_write);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
        continue;
      }
      if (((uint64_t)(io2_a_src - iop_a_src)) <= 2u) {
        if (a_src && a_src->meta.closed) {
          status = wuffs_base__make_status(wuffs_json__error__bad_input);
          goto exit;
        }
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
        continue;
      }
      v_c32 = ((uint32_t)(wuffs_base__peek_u24le__no_bounds_check(iop_a_src)));
      if ((v_c32 | 2105376u) == 6712937u) {
        if (((uint64_t)(io2_a_src - iop_a_src)) > 7u) {
          if ((wuffs_base__peek_u64le__no_bounds_check(iop_a_src) | 2314885530818453536u) == 8751735898823356009u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(10485792u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(8u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            iop_a_src += 8u;
            status = wuffs_base__make_status(NULL);
            goto ok;
          }
        } else if ( ! (a_src && a_src->meta.closed)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
          continue;
        }
        *iop_a_dst++ = wuffs_base__make_token(
            (((uint64_t)(10485792u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
            (((uint64_t)(3u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
        iop_a_src += 3u;
        status = wuffs_base__make_status(NULL);
        goto ok;
      } else if ((v_c32 | 2105376u) == 7233902u) {
        *iop_a_dst++ = wuffs_base__make_token(
            (((uint64_t)(10485888u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
            (((uint64_t)(3u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
        iop_a_src += 3u;
        status = wuffs_base__make_status(NULL);
        goto ok;
      } else if ((v_c32 & 255u) == 43u) {
        v_neg = 0u;
      } else if ((v_c32 & 255u) == 45u) {
        v_neg = 1u;
      } else {
        status = wuffs_base__make_status(wuffs_json__error__bad_input);
        goto exit;
      }
      if (((uint64_t)(io2_a_src - iop_a_src)) <= 3u) {
        if (a_src && a_src->meta.closed) {
          status = wuffs_base__make_status(wuffs_json__error__bad_input);
          goto exit;
        }
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4);
        continue;
      }
      v_c32 = (wuffs_base__peek_u32le__no_bounds_check(iop_a_src) >> 8u);
      if ((v_c32 | 2105376u) == 6712937u) {
        if (((uint64_t)(io2_a_src - iop_a_src)) > 8u) {
          if ((wuffs_base__peek_u64le__no_bounds_check(iop_a_src + 1u) | 2314885530818453536u) == 8751735898823356009u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)((10485760u | (((uint32_t)(32u)) >> v_neg)))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(9u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
            iop_a_src += 9u;
            status = wuffs_base__make_status(NULL);
            goto ok;
          }
        } else if ( ! (a_src && a_src->meta.closed)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
          continue;
        }
        *iop_a_dst++ = wuffs_base__make_token(
            (((uint64_t)((10485760u | (((uint32_t)(32u)) >> v_neg)))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
            (((uint64_t)(4u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
        iop_a_src += 4u;
        status = wuffs_base__make_status(NULL);
        goto ok;
      } else if ((v_c32 | 2105376u) == 7233902u) {
        *iop_a_dst++ = wuffs_base__make_token(
            (((uint64_t)((10485760u | (((uint32_t)(128u)) >> v_neg)))) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
            (((uint64_t)(4u)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
        iop_a_src += 4u;
        status = wuffs_base__make_status(NULL);
        goto ok;
      }
      status = wuffs_base__make_status(wuffs_json__error__bad_input);
      goto exit;
    }

    ok:
    self->private_impl.p_decode_inf_nan = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_inf_nan = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func json.decoder.decode_trailer

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_json__decoder__decode_trailer(
    wuffs_json__decoder* self,
    wuffs_base__token_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_whitespace_length = 0;

  wuffs_base__token* iop_a_dst = NULL;
  wuffs_base__token* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__token* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_trailer;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_quirks[18u]) {
      self->private_impl.f_trailer_stop = 10u;
    } else {
      self->private_impl.f_trailer_stop = 0u;
    }
    label__outer__continue:;
    while (true) {
      if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_write);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
        continue;
      }
      v_whitespace_length = 0u;
      while (true) {
        if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
          if (v_whitespace_length > 0u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(v_whitespace_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          }
          if (a_src && a_src->meta.closed) {
            goto label__outer__break;
          }
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
          goto label__outer__continue;
        }
        v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
        if (WUFFS_JSON__LUT_CLASSES[v_c8] != 0u) {
          if (v_whitespace_length > 0u) {
            *iop_a_dst++ = wuffs_base__make_token(
                (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
                (((uint64_t)(v_whitespace_length)) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          }
          if (self->private_impl.f_trailer_stop > 0u) {
            status = wuffs_base__make_status(wuffs_json__error__bad_input);
            goto exit;
          }
          if (a_dst) {
            a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
          }
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          status = wuffs_json__decoder__decode_comment(self, a_dst, a_src);
          if (a_dst) {
            iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
          }
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          if (self->private_impl.f_comment_type > 0u) {
            goto label__outer__continue;
          }
          status = wuffs_base__make_status(NULL);
          goto ok;
        }
        iop_a_src += 1u;
        if ((v_whitespace_length >= 65534u) || (v_c8 == self->private_impl.f_trailer_stop)) {
          *iop_a_dst++ = wuffs_base__make_token(
              (((uint64_t)(0u)) << WUFFS_BASE__TOKEN__VALUE_MINOR__SHIFT) |
              (((uint64_t)((v_whitespace_length + 1u))) << WUFFS_BASE__TOKEN__LENGTH__SHIFT));
          if (v_c8 == self->private_impl.f_trailer_stop) {
            status = wuffs_base__make_status(NULL);
            goto ok;
          }
          goto label__outer__continue;
        }
        v_whitespace_length += 1u;
      }
    }
    label__outer__break:;

    ok:
    self->private_impl.p_decode_trailer = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_trailer = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JSON)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZMA)

// ---------------- Status Codes Implementations

const char wuffs_lzma__error__bad_lzma2_header[] = "#lzma: bad LZMA2 header";
const char wuffs_lzma__error__bad_bitstream_trailer[] = "#lzma: bad bitstream trailer";
const char wuffs_lzma__error__bad_code[] = "#lzma: bad code";
const char wuffs_lzma__error__bad_decoded_length[] = "#lzma: bad decoded length";
const char wuffs_lzma__error__bad_distance[] = "#lzma: bad distance";
const char wuffs_lzma__error__bad_header[] = "#lzma: bad header";
const char wuffs_lzma__error__truncated_input[] = "#lzma: truncated input";
const char wuffs_lzma__error__unsupported_decoded_length[] = "#lzma: unsupported decoded length";
const char wuffs_lzma__error__unsupported_properties[] = "#lzma: unsupported properties";
const char wuffs_lzma__error__internal_error_inconsistent_i_o[] = "#lzma: internal error: inconsistent I/O";
const char wuffs_lzma__error__internal_error_inconsistent_dictionary_state[] = "#lzma: internal error: inconsistent dictionary state";

// ---------------- Private Consts

static const uint8_t
WUFFS_LZMA__STATE_TRANSITION_LITERAL[12] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 0u, 0u, 1u, 2u, 3u, 4u,
  5u, 6u, 4u, 5u,
};

static const uint8_t
WUFFS_LZMA__STATE_TRANSITION_MATCH[12] WUFFS_BASE__POTENTIALLY_UNUSED = {
  7u, 7u, 7u, 7u, 7u, 7u, 7u, 10u,
  10u, 10u, 10u, 10u,
};

static const uint8_t
WUFFS_LZMA__STATE_TRANSITION_LONGREP[12] WUFFS_BASE__POTENTIALLY_UNUSED = {
  8u, 8u, 8u, 8u, 8u, 8u, 8u, 11u,
  11u, 11u, 11u, 11u,
};

static const uint8_t
WUFFS_LZMA__STATE_TRANSITION_SHORTREP[12] WUFFS_BASE__POTENTIALLY_UNUSED = {
  9u, 9u, 9u, 9u, 9u, 9u, 9u, 11u,
  11u, 11u, 11u, 11u,
};

static const uint8_t
WUFFS_LZMA__CLAMP_NO_MORE_THAN_3[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 1u, 2u, 3u, 3u, 3u, 3u, 3u,
};

#define WUFFS_LZMA__QUIRKS_BASE 1290294272u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__decode_bitstream_fast(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__decode_bitstream_slow(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__add_history(
    wuffs_lzma__decoder* self,
    wuffs_base__slice_u8 a_hist,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__do_transform_io(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__decode_bitstream(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__update_stashed_bytes(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__decode_optional_end_of_stream(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_lzma__decoder__initialize_dict(
    wuffs_lzma__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_lzma__decoder__initialize_probs(
    wuffs_lzma__decoder* self);

// ---------------- VTables

const wuffs_base__io_transformer__func_ptrs
wuffs_lzma__decoder__func_ptrs_for__wuffs_base__io_transformer = {
  (wuffs_base__optional_u63(*)(const void*))(&wuffs_lzma__decoder__dst_history_retain_length),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_lzma__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_lzma__decoder__set_quirk),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_lzma__decoder__transform_io),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_lzma__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_lzma__decoder__initialize(
    wuffs_lzma__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__io_transformer.vtable_name =
      wuffs_base__io_transformer__vtable_name;
  self->private_impl.vtable_for__wuffs_base__io_transformer.function_pointers =
      (const void*)(&wuffs_lzma__decoder__func_ptrs_for__wuffs_base__io_transformer);
  return wuffs_base__make_status(NULL);
}

wuffs_lzma__decoder*
wuffs_lzma__decoder__alloc(void) {
  wuffs_lzma__decoder* x =
      (wuffs_lzma__decoder*)(calloc(1, sizeof(wuffs_lzma__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_lzma__decoder__initialize(
      x, sizeof(wuffs_lzma__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_lzma__decoder(void) {
  return sizeof(wuffs_lzma__decoder);
}

// ---------------- Function Implementations

// -------- func lzma.decoder.decode_bitstream_fast

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__decode_bitstream_fast(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_bits = 0;
  uint32_t v_range = 0;
  uint32_t v_state = 0;
  uint32_t v_rep0 = 0;
  uint32_t v_rep1 = 0;
  uint32_t v_rep2 = 0;
  uint32_t v_rep3 = 0;
  uint32_t v_reptmp = 0;
  uint32_t v_rep = 0;
  uint64_t v_pos = 0;
  uint64_t v_pos_end = 0;
  uint32_t v_lc = 0;
  uint64_t v_lp_mask = 0;
  uint64_t v_pb_mask = 0;
  uint32_t v_prob = 0;
  uint32_t v_threshold = 0;
  uint32_t v_tree_node = 0;
  uint8_t v_prev_byte = 0;
  uint32_t v_match_byte = 0;
  uint32_t v_match_cusp = 0;
  uint32_t v_len_state = 0;
  uint32_t v_slot = 0;
  uint32_t v_len = 0;
  uint32_t v_lanl_offset = 0;
  uint32_t v_lanl_old_offset = 0;
  uint32_t v_lanl_index = 0;
  uint32_t v_num_extra_bits = 0;
  uint32_t v_dist_extra_bits = 0;
  uint32_t v_high_bit_was_on = 0;
  uint32_t v_i = 0;
  uint32_t v_index_ao00 = 0;
  uint32_t v_index_ao41 = 0;
  uint32_t v_index_lit = 0;
  uint32_t v_index_len = 0;
  uint32_t v_index_small_dist_base = 0;
  uint32_t v_index_small_dist_extra = 0;
  uint32_t v_index_small_dist = 0;
  uint32_t v_index_large_dist = 0;
  uint32_t v_dist = 0;
  uint32_t v_adj_dist = 0;
  uint64_t v_wb_index = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_prev_byte = self->private_impl.f_stashed_bytes[0u];
  v_match_byte = ((uint32_t)(self->private_impl.f_stashed_bytes[1u]));
  v_bits = self->private_impl.f_stashed_bits;
  v_range = self->private_impl.f_stashed_range;
  v_state = self->private_impl.f_stashed_state;
  v_rep0 = self->private_impl.f_stashed_rep0;
  v_rep1 = self->private_impl.f_stashed_rep1;
  v_rep2 = self->private_impl.f_stashed_rep2;
  v_rep3 = self->private_impl.f_stashed_rep3;
  v_pos = self->private_impl.f_stashed_pos;
  v_pos_end = self->private_impl.f_stashed_pos_end;
  v_lc = self->private_impl.f_lc;
  v_lp_mask = ((((uint64_t)(1u)) << self->private_impl.f_lp) - 1u);
  v_pb_mask = ((((uint64_t)(1u)) << self->private_impl.f_pb) - 1u);
  while ((((uint64_t)(io2_a_dst - iop_a_dst)) >= 282u) && (((uint64_t)(io2_a_src - iop_a_src)) >= 48u)) {
    if (v_pos >= v_pos_end) {
      self->private_impl.f_end_of_chunk = true;
      break;
    }
    v_index_ao00 = ((v_state << 4u) | ((uint32_t)((v_pos & v_pb_mask))));
    v_prob = ((uint32_t)(self->private_data.f_probs_ao00[v_index_ao00]));
    v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
    if (v_bits < v_threshold) {
      v_range = v_threshold;
      v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
      self->private_data.f_probs_ao00[v_index_ao00] = ((uint16_t)(v_prob));
      if ((v_range >> 24u) == 0u) {
        v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
        iop_a_src += 1u;
        v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
        v_range <<= 8u;
      }
      v_index_lit = (15u & ((((uint32_t)((v_pos & v_lp_mask))) << v_lc) | (((uint32_t)(v_prev_byte)) >> (8u - v_lc))));
      v_lanl_offset = 0u;
      if (v_state >= 7u) {
        v_lanl_offset = 256u;
      }
      v_tree_node = 1u;
      while (v_tree_node < 256u) {
        v_match_byte <<= 1u;
        v_lanl_old_offset = v_lanl_offset;
        v_lanl_offset &= v_match_byte;
        v_lanl_index = (v_lanl_offset + v_lanl_old_offset + v_tree_node);
        v_prob = ((uint32_t)(self->private_data.f_probs_lit[v_index_lit][v_lanl_index]));
        v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
        if (v_bits < v_threshold) {
          v_lanl_offset = ((v_lanl_offset ^ v_lanl_old_offset) & 256u);
          v_range = v_threshold;
          v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
          self->private_data.f_probs_lit[v_index_lit][v_lanl_index] = ((uint16_t)(v_prob));
          v_tree_node = (v_tree_node << 1u);
        } else {
          v_bits -= v_threshold;
          v_range -= v_threshold;
          v_prob -= (v_prob >> 5u);
          self->private_data.f_probs_lit[v_index_lit][v_lanl_index] = ((uint16_t)(v_prob));
          v_tree_node = ((v_tree_node << 1u) | 1u);
        }
        if ((v_range >> 24u) == 0u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
            status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
            goto exit;
          }
          v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
          v_range <<= 8u;
        }
      }
      v_prev_byte = ((uint8_t)(v_tree_node));
      (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, v_prev_byte), iop_a_dst += 1);
      v_pos += 1u;
      v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_LITERAL[v_state]));
      continue;
    }
    v_bits -= v_threshold;
    v_range -= v_threshold;
    v_prob -= (v_prob >> 5u);
    self->private_data.f_probs_ao00[v_index_ao00] = ((uint16_t)(v_prob));
    if ((v_range >> 24u) == 0u) {
      v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
      iop_a_src += 1u;
      v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
      v_range <<= 8u;
    } else {
    }
    do {
      v_prob = ((uint32_t)(self->private_data.f_probs_ao20[v_state]));
      v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
      if (v_bits < v_threshold) {
        v_range = v_threshold;
        v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
        self->private_data.f_probs_ao20[v_state] = ((uint16_t)(v_prob));
        if ((v_range >> 24u) == 0u) {
          v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
          v_range <<= 8u;
        } else {
        }
        do {
          v_prob = ((uint32_t)(self->private_data.f_probs_match_len_low[0u][0u]));
          v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
          if (v_bits < v_threshold) {
            v_range = v_threshold;
            v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
            self->private_data.f_probs_match_len_low[0u][0u] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_index_len = ((uint32_t)((v_pos & v_pb_mask)));
            v_tree_node = 1u;
            while (v_tree_node < 8u) {
              v_prob = ((uint32_t)(self->private_data.f_probs_match_len_low[v_index_len][v_tree_node]));
              v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
              if (v_bits < v_threshold) {
                v_range = v_threshold;
                v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
                self->private_data.f_probs_match_len_low[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = (v_tree_node << 1u);
              } else {
                v_bits -= v_threshold;
                v_range -= v_threshold;
                v_prob -= (v_prob >> 5u);
                self->private_data.f_probs_match_len_low[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = ((v_tree_node << 1u) | 1u);
              }
              if ((v_range >> 24u) == 0u) {
                if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                  status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
                  goto exit;
                }
                v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                iop_a_src += 1u;
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
            }
            v_len_state = ((uint32_t)(WUFFS_LZMA__CLAMP_NO_MORE_THAN_3[(v_tree_node & 7u)]));
            v_len = ((v_tree_node & 7u) + 2u);
            break;
          }
          v_bits -= v_threshold;
          v_range -= v_threshold;
          v_prob -= (v_prob >> 5u);
          self->private_data.f_probs_match_len_low[0u][0u] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
              goto exit;
            }
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_prob = ((uint32_t)(self->private_data.f_probs_match_len_mid[0u][0u]));
          v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
          if (v_bits < v_threshold) {
            v_range = v_threshold;
            v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
            self->private_data.f_probs_match_len_mid[0u][0u] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
                goto exit;
              }
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_index_len = ((uint32_t)((v_pos & v_pb_mask)));
            v_tree_node = 1u;
            while (v_tree_node < 8u) {
              v_prob = ((uint32_t)(self->private_data.f_probs_match_len_mid[v_index_len][v_tree_node]));
              v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
              if (v_bits < v_threshold) {
                v_range = v_threshold;
                v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
                self->private_data.f_probs_match_len_mid[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = (v_tree_node << 1u);
              } else {
                v_bits -= v_threshold;
                v_range -= v_threshold;
                v_prob -= (v_prob >> 5u);
                self->private_data.f_probs_match_len_mid[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = ((v_tree_node << 1u) | 1u);
              }
              if ((v_range >> 24u) == 0u) {
                if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                  status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
                  goto exit;
                }
                v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                iop_a_src += 1u;
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
            }
            v_len = ((v_tree_node & 7u) + 10u);
            v_len_state = 3u;
            break;
          }
          v_bits -= v_threshold;
          v_range -= v_threshold;
          v_prob -= (v_prob >> 5u);
          self->private_data.f_probs_match_len_mid[0u][0u] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
              goto exit;
            }
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_tree_node = 1u;
          while (v_tree_node < 256u) {
            v_prob = ((uint32_t)(self->private_data.f_probs_match_len_high[0u][v_tree_node]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_match_len_high[0u][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = (v_tree_node << 1u);
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_match_len_high[0u][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = ((v_tree_node << 1u) | 1u);
            }
            if ((v_range >> 24u) == 0u) {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
                goto exit;
              }
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
          }
          v_len = ((v_tree_node & 255u) + 18u);
          v_len_state = 3u;
        } while (0);
        v_slot = 1u;
        while (v_slot < 64u) {
          v_prob = ((uint32_t)(self->private_data.f_probs_slot[v_len_state][v_slot]));
          v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
          if (v_bits < v_threshold) {
            v_range = v_threshold;
            v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
            self->private_data.f_probs_slot[v_len_state][v_slot] = ((uint16_t)(v_prob));
            v_slot = (v_slot << 1u);
          } else {
            v_bits -= v_threshold;
            v_range -= v_threshold;
            v_prob -= (v_prob >> 5u);
            self->private_data.f_probs_slot[v_len_state][v_slot] = ((uint16_t)(v_prob));
            v_slot = ((v_slot << 1u) | 1u);
          }
          if ((v_range >> 24u) == 0u) {
            if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
              goto exit;
            }
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
        }
        v_slot &= 63u;
        v_rep = v_slot;
        if (v_slot < 4u) {
        } else if (v_slot < 14u) {
          v_num_extra_bits = ((v_slot >> 1u) - 1u);
          v_rep = ((2u | (v_slot & 1u)) << v_num_extra_bits);
          v_index_small_dist_base = ((uint32_t)(v_rep - v_slot));
          v_index_small_dist_extra = 1u;
          v_dist_extra_bits = 0u;
          v_i = 0u;
          while (v_i < v_num_extra_bits) {
            v_index_small_dist = (((uint32_t)(v_index_small_dist_base + v_index_small_dist_extra)) & 127u);
            v_prob = ((uint32_t)(self->private_data.f_probs_small_dist[v_index_small_dist]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_small_dist[v_index_small_dist] = ((uint16_t)(v_prob));
              v_index_small_dist_extra = ((uint32_t)(v_index_small_dist_extra << 1u));
              v_i += 1u;
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_small_dist[v_index_small_dist] = ((uint16_t)(v_prob));
              v_index_small_dist_extra = (((uint32_t)(v_index_small_dist_extra << 1u)) | 1u);
              v_dist_extra_bits |= (((uint32_t)(1u)) << v_i);
              v_i += 1u;
            }
            if ((v_range >> 24u) == 0u) {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
                goto exit;
              }
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
          }
          v_rep += v_dist_extra_bits;
        } else {
          v_num_extra_bits = ((v_slot >> 1u) - 1u);
          v_rep = ((2u | (v_slot & 1u)) << v_num_extra_bits);
          v_dist_extra_bits = 0u;
          while (true) {
            v_range >>= 1u;
            v_bits -= v_range;
            v_high_bit_was_on = ((uint32_t)(0u - (v_bits >> 31u)));
            v_bits += (v_range & v_high_bit_was_on);
            v_dist_extra_bits = (((uint32_t)(v_dist_extra_bits << 1u)) | (((uint32_t)(v_high_bit_was_on + 1u)) & 1u));
            if ((v_range >> 24u) == 0u) {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
                goto exit;
              }
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_num_extra_bits -= 1u;
            if (v_num_extra_bits <= 4u) {
              break;
            }
          }
          v_dist_extra_bits <<= 4u;
          v_index_large_dist = 1u;
          while (true) {
            v_prob = ((uint32_t)(self->private_data.f_probs_large_dist[v_index_large_dist]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_large_dist[v_index_large_dist] = ((uint16_t)(v_prob));
              v_index_large_dist = (15u & ((uint32_t)(v_index_large_dist << 1u)));
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_large_dist[v_index_large_dist] = ((uint16_t)(v_prob));
              v_index_large_dist = (15u & (((uint32_t)(v_index_large_dist << 1u)) | 1u));
              v_dist_extra_bits |= (((uint32_t)(1u)) << (4u - v_num_extra_bits));
            }
            if ((v_range >> 24u) == 0u) {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
                goto exit;
              }
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_num_extra_bits -= 1u;
            if (v_num_extra_bits <= 0u) {
              break;
            }
          }
          v_rep += v_dist_extra_bits;
        }
        if (v_rep >= 4294967295u) {
          self->private_impl.f_end_of_chunk = true;
          goto label__outer__break;
        }
        v_rep3 = v_rep2;
        v_rep2 = v_rep1;
        v_rep1 = v_rep0;
        v_rep0 = v_rep;
        v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_MATCH[v_state]));
        break;
      }
      v_bits -= v_threshold;
      v_range -= v_threshold;
      v_prob -= (v_prob >> 5u);
      self->private_data.f_probs_ao20[v_state] = ((uint16_t)(v_prob));
      if ((v_range >> 24u) == 0u) {
        v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
        iop_a_src += 1u;
        v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
        v_range <<= 8u;
      } else {
      }
      v_prob = ((uint32_t)(self->private_data.f_probs_ao40[v_state]));
      v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
      if (v_bits < v_threshold) {
        v_range = v_threshold;
        v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
        self->private_data.f_probs_ao40[v_state] = ((uint16_t)(v_prob));
        if ((v_range >> 24u) == 0u) {
          v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
          v_range <<= 8u;
        } else {
        }
        v_index_ao41 = ((v_state << 4u) | ((uint32_t)((v_pos & v_pb_mask))));
        v_prob = ((uint32_t)(self->private_data.f_probs_ao41[v_index_ao41]));
        v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
        if (v_bits < v_threshold) {
          v_range = v_threshold;
          v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
          self->private_data.f_probs_ao41[v_index_ao41] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_len = 1u;
          v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_SHORTREP[v_state]));
          break;
        }
        v_bits -= v_threshold;
        v_range -= v_threshold;
        v_prob -= (v_prob >> 5u);
        self->private_data.f_probs_ao41[v_index_ao41] = ((uint16_t)(v_prob));
        if ((v_range >> 24u) == 0u) {
          v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
          v_range <<= 8u;
        }
      } else {
        v_bits -= v_threshold;
        v_range -= v_threshold;
        v_prob -= (v_prob >> 5u);
        self->private_data.f_probs_ao40[v_state] = ((uint16_t)(v_prob));
        if ((v_range >> 24u) == 0u) {
          v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
          v_range <<= 8u;
        } else {
        }
        v_prob = ((uint32_t)(self->private_data.f_probs_ao60[v_state]));
        v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
        if (v_bits < v_threshold) {
          v_range = v_threshold;
          v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
          self->private_data.f_probs_ao60[v_state] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_reptmp = v_rep1;
          v_rep1 = v_rep0;
          v_rep0 = v_reptmp;
        } else {
          v_bits -= v_threshold;
          v_range -= v_threshold;
          v_prob -= (v_prob >> 5u);
          self->private_data.f_probs_ao60[v_state] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          } else {
          }
          v_prob = ((uint32_t)(self->private_data.f_probs_ao63[v_state]));
          v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
          if (v_bits < v_threshold) {
            v_range = v_threshold;
            v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
            self->private_data.f_probs_ao63[v_state] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_reptmp = v_rep2;
            v_rep2 = v_rep1;
            v_rep1 = v_rep0;
            v_rep0 = v_reptmp;
          } else {
            v_bits -= v_threshold;
            v_range -= v_threshold;
            v_prob -= (v_prob >> 5u);
            self->private_data.f_probs_ao63[v_state] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_reptmp = v_rep3;
            v_rep3 = v_rep2;
            v_rep2 = v_rep1;
            v_rep1 = v_rep0;
            v_rep0 = v_reptmp;
          }
        }
      }
      do {
        v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_low[0u][0u]));
        v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
        if (v_bits < v_threshold) {
          v_range = v_threshold;
          v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
          self->private_data.f_probs_longrep_len_low[0u][0u] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
              goto exit;
            }
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_index_len = ((uint32_t)((v_pos & v_pb_mask)));
          v_tree_node = 1u;
          while (v_tree_node < 8u) {
            v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_low[v_index_len][v_tree_node]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_longrep_len_low[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = (v_tree_node << 1u);
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_longrep_len_low[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = ((v_tree_node << 1u) | 1u);
            }
            if ((v_range >> 24u) == 0u) {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
                goto exit;
              }
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
          }
          v_len = ((v_tree_node & 7u) + 2u);
          v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_LONGREP[v_state]));
          break;
        }
        v_bits -= v_threshold;
        v_range -= v_threshold;
        v_prob -= (v_prob >> 5u);
        self->private_data.f_probs_longrep_len_low[0u][0u] = ((uint16_t)(v_prob));
        if ((v_range >> 24u) == 0u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
            status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
            goto exit;
          }
          v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
          v_range <<= 8u;
        }
        v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_mid[0u][0u]));
        v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
        if (v_bits < v_threshold) {
          v_range = v_threshold;
          v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
          self->private_data.f_probs_longrep_len_mid[0u][0u] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
              goto exit;
            }
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_index_len = ((uint32_t)((v_pos & v_pb_mask)));
          v_tree_node = 1u;
          while (v_tree_node < 8u) {
            v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_mid[v_index_len][v_tree_node]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_longrep_len_mid[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = (v_tree_node << 1u);
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_longrep_len_mid[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = ((v_tree_node << 1u) | 1u);
            }
            if ((v_range >> 24u) == 0u) {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
                goto exit;
              }
              v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
              iop_a_src += 1u;
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
          }
          v_len = ((v_tree_node & 7u) + 10u);
          v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_LONGREP[v_state]));
          break;
        }
        v_bits -= v_threshold;
        v_range -= v_threshold;
        v_prob -= (v_prob >> 5u);
        self->private_data.f_probs_longrep_len_mid[0u][0u] = ((uint16_t)(v_prob));
        if ((v_range >> 24u) == 0u) {
          if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
            status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
            goto exit;
          }
          v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
          iop_a_src += 1u;
          v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
          v_range <<= 8u;
        }
        v_tree_node = 1u;
        while (v_tree_node < 256u) {
          v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_high[0u][v_tree_node]));
          v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
          if (v_bits < v_threshold) {
            v_range = v_threshold;
            v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
            self->private_data.f_probs_longrep_len_high[0u][v_tree_node] = ((uint16_t)(v_prob));
            v_tree_node = (v_tree_node << 1u);
          } else {
            v_bits -= v_threshold;
            v_range -= v_threshold;
            v_prob -= (v_prob >> 5u);
            self->private_data.f_probs_longrep_len_high[0u][v_tree_node] = ((uint16_t)(v_prob));
            v_tree_node = ((v_tree_node << 1u) | 1u);
          }
          if ((v_range >> 24u) == 0u) {
            if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_i_o);
              goto exit;
            }
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
        }
        v_len = ((v_tree_node & 255u) + 18u);
        v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_LONGREP[v_state]));
      } while (0);
    } while (0);
    v_dist = (v_rep0 + 1u);
    if ((((uint64_t)(v_dist)) > v_pos) || (((uint64_t)(v_dist)) > ((uint64_t)(self->private_impl.f_dict_size)))) {
      status = wuffs_base__make_status(wuffs_lzma__error__bad_distance);
      goto exit;
    }
    v_pos += ((uint64_t)(v_len));
    if (((uint64_t)(v_dist)) > ((uint64_t)(iop_a_dst - io0_a_dst))) {
      v_adj_dist = ((uint32_t)((((uint64_t)(v_dist)) - ((uint64_t)(iop_a_dst - io0_a_dst)))));
      if (v_adj_dist > self->private_impl.f_dict_seen) {
        status = wuffs_base__make_status(wuffs_lzma__error__bad_distance);
        goto exit;
      }
      v_wb_index = ((uint64_t)(((uint64_t)(self->private_impl.f_dict_workbuf_index)) - ((uint64_t)(v_adj_dist))));
      while (v_wb_index >= 9223372036854775808u) {
        v_wb_index += ((uint64_t)(self->private_impl.f_dict_size));
      }
      if (v_wb_index >= ((uint64_t)(a_workbuf.len))) {
        status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
        goto exit;
      }
      if (v_len < v_adj_dist) {
        wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
            &iop_a_dst, io2_a_dst,(v_len + 1u), wuffs_base__slice_u8__subslice_i(a_workbuf, v_wb_index));
        if ( ! (iop_a_dst > io1_a_dst)) {
          status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
          goto exit;
        }
        v_match_byte = ((uint32_t)(iop_a_dst[-1]));
        iop_a_dst--;
        if ( ! (iop_a_dst > io1_a_dst)) {
          status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
          goto exit;
        }
        v_prev_byte = iop_a_dst[-1];
        continue;
      } else if (v_len == v_adj_dist) {
        wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
            &iop_a_dst, io2_a_dst,v_len, wuffs_base__slice_u8__subslice_i(a_workbuf, v_wb_index));
        wuffs_private_impl__io_writer__limited_copy_u32_from_history(
            &iop_a_dst, io0_a_dst, io2_a_dst, 1u, v_dist);
        if ( ! (iop_a_dst > io1_a_dst)) {
          status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
          goto exit;
        }
        v_match_byte = ((uint32_t)(iop_a_dst[-1]));
        iop_a_dst--;
        if ( ! (iop_a_dst > io1_a_dst)) {
          status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
          goto exit;
        }
        v_prev_byte = iop_a_dst[-1];
        continue;
      }
      wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
          &iop_a_dst, io2_a_dst,v_adj_dist, wuffs_base__slice_u8__subslice_i(a_workbuf, v_wb_index));
      v_len -= v_adj_dist;
      if ((((uint64_t)(v_len)) > ((uint64_t)(io2_a_dst - iop_a_dst))) || (((uint64_t)((v_len + 8u))) > ((uint64_t)(io2_a_dst - iop_a_dst))) || (((uint64_t)(v_dist)) > ((uint64_t)(iop_a_dst - io0_a_dst)))) {
        status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
        goto exit;
      }
    }
    if (v_dist >= 8u) {
      v_match_cusp = wuffs_private_impl__io_writer__limited_copy_u32_from_history_8_byte_chunks_fast_return_cusp(
          &iop_a_dst, io0_a_dst, io2_a_dst, v_len, v_dist);
      v_match_byte = (v_match_cusp >> 8u);
      v_prev_byte = ((uint8_t)(v_match_cusp));
    } else {
      v_match_cusp = wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast_return_cusp(
          &iop_a_dst, io0_a_dst, io2_a_dst, v_len, v_dist);
      v_match_byte = (v_match_cusp >> 8u);
      v_prev_byte = ((uint8_t)(v_match_cusp));
    }
  }
  label__outer__break:;
  self->private_impl.f_stashed_bytes[0u] = v_prev_byte;
  self->private_impl.f_stashed_bytes[1u] = ((uint8_t)(v_match_byte));
  self->private_impl.f_stashed_bits = v_bits;
  self->private_impl.f_stashed_range = v_range;
  self->private_impl.f_stashed_state = v_state;
  self->private_impl.f_stashed_rep0 = v_rep0;
  self->private_impl.f_stashed_rep1 = v_rep1;
  self->private_impl.f_stashed_rep2 = v_rep2;
  self->private_impl.f_stashed_rep3 = v_rep3;
  self->private_impl.f_stashed_pos = v_pos;
  self->private_impl.f_stashed_pos_end = v_pos_end;
  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func lzma.decoder.decode_bitstream_slow

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__decode_bitstream_slow(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_bits = 0;
  uint32_t v_range = 0;
  uint32_t v_state = 0;
  uint32_t v_rep0 = 0;
  uint32_t v_rep1 = 0;
  uint32_t v_rep2 = 0;
  uint32_t v_rep3 = 0;
  uint32_t v_reptmp = 0;
  uint32_t v_rep = 0;
  uint64_t v_pos = 0;
  uint64_t v_pos_end = 0;
  uint32_t v_lc = 0;
  uint64_t v_lp_mask = 0;
  uint64_t v_pb_mask = 0;
  uint32_t v_prob = 0;
  uint32_t v_threshold = 0;
  uint32_t v_tree_node = 0;
  uint8_t v_prev_byte = 0;
  uint32_t v_match_byte = 0;
  uint32_t v_match_cusp = 0;
  uint32_t v_len_state = 0;
  uint32_t v_slot = 0;
  uint32_t v_len = 0;
  uint32_t v_lanl_offset = 0;
  uint32_t v_lanl_old_offset = 0;
  uint32_t v_lanl_index = 0;
  uint32_t v_num_extra_bits = 0;
  uint32_t v_dist_extra_bits = 0;
  uint32_t v_high_bit_was_on = 0;
  uint32_t v_i = 0;
  uint32_t v_index_ao00 = 0;
  uint32_t v_index_ao41 = 0;
  uint32_t v_index_lit = 0;
  uint32_t v_index_len = 0;
  uint32_t v_index_small_dist_base = 0;
  uint32_t v_index_small_dist_extra = 0;
  uint32_t v_index_small_dist = 0;
  uint32_t v_index_large_dist = 0;
  uint32_t v_dist = 0;
  uint32_t v_adj_dist = 0;
  uint64_t v_wb_index = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_bitstream_slow;
  if (coro_susp_point) {
    v_bits = self->private_data.s_decode_bitstream_slow.v_bits;
    v_range = self->private_data.s_decode_bitstream_slow.v_range;
    v_state = self->private_data.s_decode_bitstream_slow.v_state;
    v_rep0 = self->private_data.s_decode_bitstream_slow.v_rep0;
    v_rep1 = self->private_data.s_decode_bitstream_slow.v_rep1;
    v_rep2 = self->private_data.s_decode_bitstream_slow.v_rep2;
    v_rep3 = self->private_data.s_decode_bitstream_slow.v_rep3;
    v_rep = self->private_data.s_decode_bitstream_slow.v_rep;
    v_pos = self->private_data.s_decode_bitstream_slow.v_pos;
    v_pos_end = self->private_data.s_decode_bitstream_slow.v_pos_end;
    v_lc = self->private_data.s_decode_bitstream_slow.v_lc;
    v_lp_mask = self->private_data.s_decode_bitstream_slow.v_lp_mask;
    v_pb_mask = self->private_data.s_decode_bitstream_slow.v_pb_mask;
    v_tree_node = self->private_data.s_decode_bitstream_slow.v_tree_node;
    v_prev_byte = self->private_data.s_decode_bitstream_slow.v_prev_byte;
    v_match_byte = self->private_data.s_decode_bitstream_slow.v_match_byte;
    v_len_state = self->private_data.s_decode_bitstream_slow.v_len_state;
    v_slot = self->private_data.s_decode_bitstream_slow.v_slot;
    v_len = self->private_data.s_decode_bitstream_slow.v_len;
    v_lanl_offset = self->private_data.s_decode_bitstream_slow.v_lanl_offset;
    v_num_extra_bits = self->private_data.s_decode_bitstream_slow.v_num_extra_bits;
    v_dist_extra_bits = self->private_data.s_decode_bitstream_slow.v_dist_extra_bits;
    v_i = self->private_data.s_decode_bitstream_slow.v_i;
    v_index_lit = self->private_data.s_decode_bitstream_slow.v_index_lit;
    v_index_len = self->private_data.s_decode_bitstream_slow.v_index_len;
    v_index_small_dist_base = self->private_data.s_decode_bitstream_slow.v_index_small_dist_base;
    v_index_small_dist_extra = self->private_data.s_decode_bitstream_slow.v_index_small_dist_extra;
    v_index_large_dist = self->private_data.s_decode_bitstream_slow.v_index_large_dist;
    v_dist = self->private_data.s_decode_bitstream_slow.v_dist;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    v_prev_byte = self->private_impl.f_stashed_bytes[0u];
    v_match_byte = ((uint32_t)(self->private_impl.f_stashed_bytes[1u]));
    v_bits = self->private_impl.f_stashed_bits;
    v_range = self->private_impl.f_stashed_range;
    v_state = self->private_impl.f_stashed_state;
    v_rep0 = self->private_impl.f_stashed_rep0;
    v_rep1 = self->private_impl.f_stashed_rep1;
    v_rep2 = self->private_impl.f_stashed_rep2;
    v_rep3 = self->private_impl.f_stashed_rep3;
    v_pos = self->private_impl.f_stashed_pos;
    v_pos_end = self->private_impl.f_stashed_pos_end;
    v_lc = self->private_impl.f_lc;
    v_lp_mask = ((((uint64_t)(1u)) << self->private_impl.f_lp) - 1u);
    v_pb_mask = ((((uint64_t)(1u)) << self->private_impl.f_pb) - 1u);
    while ( ! (self->private_impl.p_decode_bitstream_slow != 0)) {
      if (v_pos >= v_pos_end) {
        self->private_impl.f_end_of_chunk = true;
        break;
      }
      v_index_ao00 = ((v_state << 4u) | ((uint32_t)((v_pos & v_pb_mask))));
      v_prob = ((uint32_t)(self->private_data.f_probs_ao00[v_index_ao00]));
      v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
      if (v_bits < v_threshold) {
        v_range = v_threshold;
        v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
        self->private_data.f_probs_ao00[v_index_ao00] = ((uint16_t)(v_prob));
        if ((v_range >> 24u) == 0u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_0 = *iop_a_src++;
            v_c8 = t_0;
          }
          v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
          v_range <<= 8u;
        }
        v_index_lit = (15u & ((((uint32_t)((v_pos & v_lp_mask))) << v_lc) | (((uint32_t)(v_prev_byte)) >> (8u - v_lc))));
        if (v_state >= 7u) {
          v_lanl_offset = 256u;
          v_tree_node = 1u;
          while (v_tree_node < 256u) {
            v_match_byte <<= 1u;
            v_lanl_old_offset = v_lanl_offset;
            v_lanl_offset &= v_match_byte;
            v_lanl_index = (v_lanl_offset + v_lanl_old_offset + v_tree_node);
            v_prob = ((uint32_t)(self->private_data.f_probs_lit[v_index_lit][v_lanl_index]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_lanl_offset = ((v_lanl_offset ^ v_lanl_old_offset) & 256u);
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_lit[v_index_lit][v_lanl_index] = ((uint16_t)(v_prob));
              v_tree_node = (v_tree_node << 1u);
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_lit[v_index_lit][v_lanl_index] = ((uint16_t)(v_prob));
              v_tree_node = ((v_tree_node << 1u) | 1u);
            }
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_1 = *iop_a_src++;
                v_c8 = t_1;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
          }
        } else {
          v_tree_node = 1u;
          while (v_tree_node < 256u) {
            v_prob = ((uint32_t)(self->private_data.f_probs_lit[v_index_lit][v_tree_node]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_lit[v_index_lit][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = (v_tree_node << 1u);
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_lit[v_index_lit][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = ((v_tree_node << 1u) | 1u);
            }
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_2 = *iop_a_src++;
                v_c8 = t_2;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
          }
        }
        v_prev_byte = ((uint8_t)(v_tree_node));
        self->private_data.s_decode_bitstream_slow.scratch = v_prev_byte;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        if (iop_a_dst == io2_a_dst) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_write);
          goto suspend;
        }
        *iop_a_dst++ = ((uint8_t)(self->private_data.s_decode_bitstream_slow.scratch));
        v_pos += 1u;
        v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_LITERAL[v_state]));
        continue;
      }
      v_bits -= v_threshold;
      v_range -= v_threshold;
      v_prob -= (v_prob >> 5u);
      self->private_data.f_probs_ao00[v_index_ao00] = ((uint16_t)(v_prob));
      if ((v_range >> 24u) == 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_3 = *iop_a_src++;
          v_c8 = t_3;
        }
        v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
        v_range <<= 8u;
      }
      do {
        v_prob = ((uint32_t)(self->private_data.f_probs_ao20[v_state]));
        v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
        if (v_bits < v_threshold) {
          v_range = v_threshold;
          v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
          self->private_data.f_probs_ao20[v_state] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_4 = *iop_a_src++;
              v_c8 = t_4;
            }
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          do {
            v_prob = ((uint32_t)(self->private_data.f_probs_match_len_low[0u][0u]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_match_len_low[0u][0u] = ((uint16_t)(v_prob));
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_5 = *iop_a_src++;
                  v_c8 = t_5;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
              v_index_len = ((uint32_t)((v_pos & v_pb_mask)));
              v_tree_node = 1u;
              while (v_tree_node < 8u) {
                v_prob = ((uint32_t)(self->private_data.f_probs_match_len_low[v_index_len][v_tree_node]));
                v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
                if (v_bits < v_threshold) {
                  v_range = v_threshold;
                  v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
                  self->private_data.f_probs_match_len_low[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                  v_tree_node = (v_tree_node << 1u);
                } else {
                  v_bits -= v_threshold;
                  v_range -= v_threshold;
                  v_prob -= (v_prob >> 5u);
                  self->private_data.f_probs_match_len_low[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                  v_tree_node = ((v_tree_node << 1u) | 1u);
                }
                if ((v_range >> 24u) == 0u) {
                  {
                    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
                    if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                      goto suspend;
                    }
                    uint8_t t_6 = *iop_a_src++;
                    v_c8 = t_6;
                  }
                  v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                  v_range <<= 8u;
                }
              }
              v_len_state = ((uint32_t)(WUFFS_LZMA__CLAMP_NO_MORE_THAN_3[(v_tree_node & 7u)]));
              v_len = ((v_tree_node & 7u) + 2u);
              break;
            }
            v_bits -= v_threshold;
            v_range -= v_threshold;
            v_prob -= (v_prob >> 5u);
            self->private_data.f_probs_match_len_low[0u][0u] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_7 = *iop_a_src++;
                v_c8 = t_7;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_prob = ((uint32_t)(self->private_data.f_probs_match_len_mid[0u][0u]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_match_len_mid[0u][0u] = ((uint16_t)(v_prob));
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_8 = *iop_a_src++;
                  v_c8 = t_8;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
              v_index_len = ((uint32_t)((v_pos & v_pb_mask)));
              v_tree_node = 1u;
              while (v_tree_node < 8u) {
                v_prob = ((uint32_t)(self->private_data.f_probs_match_len_mid[v_index_len][v_tree_node]));
                v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
                if (v_bits < v_threshold) {
                  v_range = v_threshold;
                  v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
                  self->private_data.f_probs_match_len_mid[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                  v_tree_node = (v_tree_node << 1u);
                } else {
                  v_bits -= v_threshold;
                  v_range -= v_threshold;
                  v_prob -= (v_prob >> 5u);
                  self->private_data.f_probs_match_len_mid[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                  v_tree_node = ((v_tree_node << 1u) | 1u);
                }
                if ((v_range >> 24u) == 0u) {
                  {
                    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
                    if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                      goto suspend;
                    }
                    uint8_t t_9 = *iop_a_src++;
                    v_c8 = t_9;
                  }
                  v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                  v_range <<= 8u;
                }
              }
              v_len = ((v_tree_node & 7u) + 10u);
              v_len_state = 3u;
              break;
            }
            v_bits -= v_threshold;
            v_range -= v_threshold;
            v_prob -= (v_prob >> 5u);
            self->private_data.f_probs_match_len_mid[0u][0u] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_10 = *iop_a_src++;
                v_c8 = t_10;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_tree_node = 1u;
            while (v_tree_node < 256u) {
              v_prob = ((uint32_t)(self->private_data.f_probs_match_len_high[0u][v_tree_node]));
              v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
              if (v_bits < v_threshold) {
                v_range = v_threshold;
                v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
                self->private_data.f_probs_match_len_high[0u][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = (v_tree_node << 1u);
              } else {
                v_bits -= v_threshold;
                v_range -= v_threshold;
                v_prob -= (v_prob >> 5u);
                self->private_data.f_probs_match_len_high[0u][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = ((v_tree_node << 1u) | 1u);
              }
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_11 = *iop_a_src++;
                  v_c8 = t_11;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
            }
            v_len = ((v_tree_node & 255u) + 18u);
            v_len_state = 3u;
          } while (0);
          v_slot = 1u;
          while (v_slot < 64u) {
            v_prob = ((uint32_t)(self->private_data.f_probs_slot[v_len_state][v_slot]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_slot[v_len_state][v_slot] = ((uint16_t)(v_prob));
              v_slot = (v_slot << 1u);
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_slot[v_len_state][v_slot] = ((uint16_t)(v_prob));
              v_slot = ((v_slot << 1u) | 1u);
            }
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_12 = *iop_a_src++;
                v_c8 = t_12;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
          }
          v_slot &= 63u;
          v_rep = v_slot;
          if (v_slot < 4u) {
          } else if (v_slot < 14u) {
            v_num_extra_bits = ((v_slot >> 1u) - 1u);
            v_rep = ((2u | (v_slot & 1u)) << v_num_extra_bits);
            v_index_small_dist_base = ((uint32_t)(v_rep - v_slot));
            v_index_small_dist_extra = 1u;
            v_dist_extra_bits = 0u;
            v_i = 0u;
            while (v_i < v_num_extra_bits) {
              v_index_small_dist = (((uint32_t)(v_index_small_dist_base + v_index_small_dist_extra)) & 127u);
              v_prob = ((uint32_t)(self->private_data.f_probs_small_dist[v_index_small_dist]));
              v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
              if (v_bits < v_threshold) {
                v_range = v_threshold;
                v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
                self->private_data.f_probs_small_dist[v_index_small_dist] = ((uint16_t)(v_prob));
                v_index_small_dist_extra = ((uint32_t)(v_index_small_dist_extra << 1u));
                v_i += 1u;
              } else {
                v_bits -= v_threshold;
                v_range -= v_threshold;
                v_prob -= (v_prob >> 5u);
                self->private_data.f_probs_small_dist[v_index_small_dist] = ((uint16_t)(v_prob));
                v_index_small_dist_extra = (((uint32_t)(v_index_small_dist_extra << 1u)) | 1u);
                v_dist_extra_bits |= (((uint32_t)(1u)) << v_i);
                v_i += 1u;
              }
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_13 = *iop_a_src++;
                  v_c8 = t_13;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
            }
            v_rep += v_dist_extra_bits;
          } else {
            v_num_extra_bits = ((v_slot >> 1u) - 1u);
            v_rep = ((2u | (v_slot & 1u)) << v_num_extra_bits);
            v_dist_extra_bits = 0u;
            while (true) {
              v_range >>= 1u;
              v_bits -= v_range;
              v_high_bit_was_on = ((uint32_t)(0u - (v_bits >> 31u)));
              v_bits += (v_range & v_high_bit_was_on);
              v_dist_extra_bits = (((uint32_t)(v_dist_extra_bits << 1u)) | (((uint32_t)(v_high_bit_was_on + 1u)) & 1u));
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_14 = *iop_a_src++;
                  v_c8 = t_14;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
              v_num_extra_bits -= 1u;
              if (v_num_extra_bits <= 4u) {
                break;
              }
            }
            v_dist_extra_bits <<= 4u;
            v_index_large_dist = 1u;
            while (true) {
              v_prob = ((uint32_t)(self->private_data.f_probs_large_dist[v_index_large_dist]));
              v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
              if (v_bits < v_threshold) {
                v_range = v_threshold;
                v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
                self->private_data.f_probs_large_dist[v_index_large_dist] = ((uint16_t)(v_prob));
                v_index_large_dist = (15u & ((uint32_t)(v_index_large_dist << 1u)));
              } else {
                v_bits -= v_threshold;
                v_range -= v_threshold;
                v_prob -= (v_prob >> 5u);
                self->private_data.f_probs_large_dist[v_index_large_dist] = ((uint16_t)(v_prob));
                v_index_large_dist = (15u & (((uint32_t)(v_index_large_dist << 1u)) | 1u));
                v_dist_extra_bits |= (((uint32_t)(1u)) << (4u - v_num_extra_bits));
              }
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(17);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_15 = *iop_a_src++;
                  v_c8 = t_15;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
              v_num_extra_bits -= 1u;
              if (v_num_extra_bits <= 0u) {
                break;
              }
            }
            v_rep += v_dist_extra_bits;
          }
          if (v_rep >= 4294967295u) {
            self->private_impl.f_end_of_chunk = true;
            goto label__outer__break;
          }
          v_rep3 = v_rep2;
          v_rep2 = v_rep1;
          v_rep1 = v_rep0;
          v_rep0 = v_rep;
          v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_MATCH[v_state]));
          break;
        }
        v_bits -= v_threshold;
        v_range -= v_threshold;
        v_prob -= (v_prob >> 5u);
        self->private_data.f_probs_ao20[v_state] = ((uint16_t)(v_prob));
        if ((v_range >> 24u) == 0u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(18);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_16 = *iop_a_src++;
            v_c8 = t_16;
          }
          v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
          v_range <<= 8u;
        }
        v_prob = ((uint32_t)(self->private_data.f_probs_ao40[v_state]));
        v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
        if (v_bits < v_threshold) {
          v_range = v_threshold;
          v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
          self->private_data.f_probs_ao40[v_state] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(19);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_17 = *iop_a_src++;
              v_c8 = t_17;
            }
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_index_ao41 = ((v_state << 4u) | ((uint32_t)((v_pos & v_pb_mask))));
          v_prob = ((uint32_t)(self->private_data.f_probs_ao41[v_index_ao41]));
          v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
          if (v_bits < v_threshold) {
            v_range = v_threshold;
            v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
            self->private_data.f_probs_ao41[v_index_ao41] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(20);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_18 = *iop_a_src++;
                v_c8 = t_18;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_len = 1u;
            v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_SHORTREP[v_state]));
            break;
          }
          v_bits -= v_threshold;
          v_range -= v_threshold;
          v_prob -= (v_prob >> 5u);
          self->private_data.f_probs_ao41[v_index_ao41] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(21);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_19 = *iop_a_src++;
              v_c8 = t_19;
            }
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
        } else {
          v_bits -= v_threshold;
          v_range -= v_threshold;
          v_prob -= (v_prob >> 5u);
          self->private_data.f_probs_ao40[v_state] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(22);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_20 = *iop_a_src++;
              v_c8 = t_20;
            }
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_prob = ((uint32_t)(self->private_data.f_probs_ao60[v_state]));
          v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
          if (v_bits < v_threshold) {
            v_range = v_threshold;
            v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
            self->private_data.f_probs_ao60[v_state] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(23);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_21 = *iop_a_src++;
                v_c8 = t_21;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_reptmp = v_rep1;
            v_rep1 = v_rep0;
            v_rep0 = v_reptmp;
          } else {
            v_bits -= v_threshold;
            v_range -= v_threshold;
            v_prob -= (v_prob >> 5u);
            self->private_data.f_probs_ao60[v_state] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(24);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_22 = *iop_a_src++;
                v_c8 = t_22;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_prob = ((uint32_t)(self->private_data.f_probs_ao63[v_state]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_ao63[v_state] = ((uint16_t)(v_prob));
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(25);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_23 = *iop_a_src++;
                  v_c8 = t_23;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
              v_reptmp = v_rep2;
              v_rep2 = v_rep1;
              v_rep1 = v_rep0;
              v_rep0 = v_reptmp;
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_ao63[v_state] = ((uint16_t)(v_prob));
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(26);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_24 = *iop_a_src++;
                  v_c8 = t_24;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
              v_reptmp = v_rep3;
              v_rep3 = v_rep2;
              v_rep2 = v_rep1;
              v_rep1 = v_rep0;
              v_rep0 = v_reptmp;
            }
          }
        }
        do {
          v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_low[0u][0u]));
          v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
          if (v_bits < v_threshold) {
            v_range = v_threshold;
            v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
            self->private_data.f_probs_longrep_len_low[0u][0u] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(27);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_25 = *iop_a_src++;
                v_c8 = t_25;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_index_len = ((uint32_t)((v_pos & v_pb_mask)));
            v_tree_node = 1u;
            while (v_tree_node < 8u) {
              v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_low[v_index_len][v_tree_node]));
              v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
              if (v_bits < v_threshold) {
                v_range = v_threshold;
                v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
                self->private_data.f_probs_longrep_len_low[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = (v_tree_node << 1u);
              } else {
                v_bits -= v_threshold;
                v_range -= v_threshold;
                v_prob -= (v_prob >> 5u);
                self->private_data.f_probs_longrep_len_low[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = ((v_tree_node << 1u) | 1u);
              }
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(28);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_26 = *iop_a_src++;
                  v_c8 = t_26;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
            }
            v_len = ((v_tree_node & 7u) + 2u);
            v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_LONGREP[v_state]));
            break;
          }
          v_bits -= v_threshold;
          v_range -= v_threshold;
          v_prob -= (v_prob >> 5u);
          self->private_data.f_probs_longrep_len_low[0u][0u] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(29);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_27 = *iop_a_src++;
              v_c8 = t_27;
            }
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_mid[0u][0u]));
          v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
          if (v_bits < v_threshold) {
            v_range = v_threshold;
            v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
            self->private_data.f_probs_longrep_len_mid[0u][0u] = ((uint16_t)(v_prob));
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(30);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_28 = *iop_a_src++;
                v_c8 = t_28;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
            v_index_len = ((uint32_t)((v_pos & v_pb_mask)));
            v_tree_node = 1u;
            while (v_tree_node < 8u) {
              v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_mid[v_index_len][v_tree_node]));
              v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
              if (v_bits < v_threshold) {
                v_range = v_threshold;
                v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
                self->private_data.f_probs_longrep_len_mid[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = (v_tree_node << 1u);
              } else {
                v_bits -= v_threshold;
                v_range -= v_threshold;
                v_prob -= (v_prob >> 5u);
                self->private_data.f_probs_longrep_len_mid[v_index_len][v_tree_node] = ((uint16_t)(v_prob));
                v_tree_node = ((v_tree_node << 1u) | 1u);
              }
              if ((v_range >> 24u) == 0u) {
                {
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT(31);
                  if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    goto suspend;
                  }
                  uint8_t t_29 = *iop_a_src++;
                  v_c8 = t_29;
                }
                v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
                v_range <<= 8u;
              }
            }
            v_len = ((v_tree_node & 7u) + 10u);
            v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_LONGREP[v_state]));
            break;
          }
          v_bits -= v_threshold;
          v_range -= v_threshold;
          v_prob -= (v_prob >> 5u);
          self->private_data.f_probs_longrep_len_mid[0u][0u] = ((uint16_t)(v_prob));
          if ((v_range >> 24u) == 0u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(32);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_30 = *iop_a_src++;
              v_c8 = t_30;
            }
            v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
            v_range <<= 8u;
          }
          v_tree_node = 1u;
          while (v_tree_node < 256u) {
            v_prob = ((uint32_t)(self->private_data.f_probs_longrep_len_high[0u][v_tree_node]));
            v_threshold = ((uint32_t)((v_range >> 11u) * v_prob));
            if (v_bits < v_threshold) {
              v_range = v_threshold;
              v_prob += (((uint32_t)(2048u - v_prob)) >> 5u);
              self->private_data.f_probs_longrep_len_high[0u][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = (v_tree_node << 1u);
            } else {
              v_bits -= v_threshold;
              v_range -= v_threshold;
              v_prob -= (v_prob >> 5u);
              self->private_data.f_probs_longrep_len_high[0u][v_tree_node] = ((uint16_t)(v_prob));
              v_tree_node = ((v_tree_node << 1u) | 1u);
            }
            if ((v_range >> 24u) == 0u) {
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(33);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_31 = *iop_a_src++;
                v_c8 = t_31;
              }
              v_bits = (((uint32_t)(v_bits << 8u)) | ((uint32_t)(v_c8)));
              v_range <<= 8u;
            }
          }
          v_len = ((v_tree_node & 255u) + 18u);
          v_state = ((uint32_t)(WUFFS_LZMA__STATE_TRANSITION_LONGREP[v_state]));
        } while (0);
      } while (0);
      v_dist = (v_rep0 + 1u);
      if ((((uint64_t)(v_dist)) > v_pos) || (((uint64_t)(v_dist)) > ((uint64_t)(self->private_impl.f_dict_size)))) {
        status = wuffs_base__make_status(wuffs_lzma__error__bad_distance);
        goto exit;
      }
      v_pos += ((uint64_t)(v_len));
      while (274u > ((uint64_t)(io2_a_dst - iop_a_dst))) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_write);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(34);
      }
      if (((uint64_t)(v_dist)) > ((uint64_t)(iop_a_dst - io0_a_dst))) {
        v_adj_dist = ((uint32_t)((((uint64_t)(v_dist)) - ((uint64_t)(iop_a_dst - io0_a_dst)))));
        if (v_adj_dist > self->private_impl.f_dict_seen) {
          status = wuffs_base__make_status(wuffs_lzma__error__bad_distance);
          goto exit;
        }
        v_wb_index = ((uint64_t)(((uint64_t)(self->private_impl.f_dict_workbuf_index)) - ((uint64_t)(v_adj_dist))));
        while (v_wb_index >= 9223372036854775808u) {
          v_wb_index += ((uint64_t)(self->private_impl.f_dict_size));
        }
        if (v_wb_index >= ((uint64_t)(a_workbuf.len))) {
          status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
          goto exit;
        }
        if (v_len < v_adj_dist) {
          wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
              &iop_a_dst, io2_a_dst,(v_len + 1u), wuffs_base__slice_u8__subslice_i(a_workbuf, v_wb_index));
          if ( ! (iop_a_dst > io1_a_dst)) {
            status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
            goto exit;
          }
          v_match_byte = ((uint32_t)(iop_a_dst[-1]));
          iop_a_dst--;
          if ( ! (iop_a_dst > io1_a_dst)) {
            status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
            goto exit;
          }
          v_prev_byte = iop_a_dst[-1];
          continue;
        } else if (v_len == v_adj_dist) {
          wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
              &iop_a_dst, io2_a_dst,v_len, wuffs_base__slice_u8__subslice_i(a_workbuf, v_wb_index));
          wuffs_private_impl__io_writer__limited_copy_u32_from_history(
              &iop_a_dst, io0_a_dst, io2_a_dst, 1u, v_dist);
          if ( ! (iop_a_dst > io1_a_dst)) {
            status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
            goto exit;
          }
          v_match_byte = ((uint32_t)(iop_a_dst[-1]));
          iop_a_dst--;
          if ( ! (iop_a_dst > io1_a_dst)) {
            status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
            goto exit;
          }
          v_prev_byte = iop_a_dst[-1];
          continue;
        }
        wuffs_private_impl__io_writer__limited_copy_u32_from_slice(
            &iop_a_dst, io2_a_dst,v_adj_dist, wuffs_base__slice_u8__subslice_i(a_workbuf, v_wb_index));
        v_len -= v_adj_dist;
        if ((((uint64_t)(v_len)) > ((uint64_t)(io2_a_dst - iop_a_dst))) || (((uint64_t)(v_dist)) > ((uint64_t)(iop_a_dst - io0_a_dst)))) {
          status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
          goto exit;
        }
      }
      v_match_cusp = wuffs_private_impl__io_writer__limited_copy_u32_from_history_fast_return_cusp(
          &iop_a_dst, io0_a_dst, io2_a_dst, v_len, v_dist);
      v_match_byte = (v_match_cusp >> 8u);
      v_prev_byte = ((uint8_t)(v_match_cusp));
    }
    label__outer__break:;
    self->private_impl.f_stashed_bytes[0u] = v_prev_byte;
    self->private_impl.f_stashed_bytes[1u] = ((uint8_t)(v_match_byte));
    self->private_impl.f_stashed_bits = v_bits;
    self->private_impl.f_stashed_range = v_range;
    self->private_impl.f_stashed_state = v_state;
    self->private_impl.f_stashed_rep0 = v_rep0;
    self->private_impl.f_stashed_rep1 = v_rep1;
    self->private_impl.f_stashed_rep2 = v_rep2;
    self->private_impl.f_stashed_rep3 = v_rep3;
    self->private_impl.f_stashed_pos = v_pos;
    self->private_impl.f_stashed_pos_end = v_pos_end;

    ok:
    self->private_impl.p_decode_bitstream_slow = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_bitstream_slow = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_bitstream_slow.v_bits = v_bits;
  self->private_data.s_decode_bitstream_slow.v_range = v_range;
  self->private_data.s_decode_bitstream_slow.v_state = v_state;
  self->private_data.s_decode_bitstream_slow.v_rep0 = v_rep0;
  self->private_data.s_decode_bitstream_slow.v_rep1 = v_rep1;
  self->private_data.s_decode_bitstream_slow.v_rep2 = v_rep2;
  self->private_data.s_decode_bitstream_slow.v_rep3 = v_rep3;
  self->private_data.s_decode_bitstream_slow.v_rep = v_rep;
  self->private_data.s_decode_bitstream_slow.v_pos = v_pos;
  self->private_data.s_decode_bitstream_slow.v_pos_end = v_pos_end;
  self->private_data.s_decode_bitstream_slow.v_lc = v_lc;
  self->private_data.s_decode_bitstream_slow.v_lp_mask = v_lp_mask;
  self->private_data.s_decode_bitstream_slow.v_pb_mask = v_pb_mask;
  self->private_data.s_decode_bitstream_slow.v_tree_node = v_tree_node;
  self->private_data.s_decode_bitstream_slow.v_prev_byte = v_prev_byte;
  self->private_data.s_decode_bitstream_slow.v_match_byte = v_match_byte;
  self->private_data.s_decode_bitstream_slow.v_len_state = v_len_state;
  self->private_data.s_decode_bitstream_slow.v_slot = v_slot;
  self->private_data.s_decode_bitstream_slow.v_len = v_len;
  self->private_data.s_decode_bitstream_slow.v_lanl_offset = v_lanl_offset;
  self->private_data.s_decode_bitstream_slow.v_num_extra_bits = v_num_extra_bits;
  self->private_data.s_decode_bitstream_slow.v_dist_extra_bits = v_dist_extra_bits;
  self->private_data.s_decode_bitstream_slow.v_i = v_i;
  self->private_data.s_decode_bitstream_slow.v_index_lit = v_index_lit;
  self->private_data.s_decode_bitstream_slow.v_index_len = v_index_len;
  self->private_data.s_decode_bitstream_slow.v_index_small_dist_base = v_index_small_dist_base;
  self->private_data.s_decode_bitstream_slow.v_index_small_dist_extra = v_index_small_dist_extra;
  self->private_data.s_decode_bitstream_slow.v_index_large_dist = v_index_large_dist;
  self->private_data.s_decode_bitstream_slow.v_dist = v_dist;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func lzma.decoder.add_history

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__add_history(
    wuffs_lzma__decoder* self,
    wuffs_base__slice_u8 a_hist,
    wuffs_base__slice_u8 a_workbuf) {
  uint64_t v_dict_workbuf_index = 0;
  uint64_t v_dict_size = 0;
  uint64_t v_hist_length = 0;
  wuffs_base__slice_u8 v_s = {0};
  uint64_t v_n_copied = 0;
  uint64_t v_n = 0;

  v_dict_workbuf_index = ((uint64_t)(self->private_impl.f_dict_workbuf_index));
  v_dict_size = ((uint64_t)(self->private_impl.f_dict_size));
  if (((uint64_t)(a_hist.len)) == 0u) {
    return wuffs_base__make_status(NULL);
  }
  if (((uint64_t)(a_workbuf.len)) < (v_dict_size + 273u)) {
    return wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
  }
  v_hist_length = ((uint64_t)(a_hist.len));
  if (v_hist_length > 4294967295u) {
    self->private_impl.f_dict_seen = 4294967295u;
  } else {
    wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dict_seen, ((uint32_t)(v_hist_length)));
  }
  v_s = a_hist;
  if (((uint64_t)(v_s.len)) >= v_dict_size) {
    v_s = wuffs_private_impl__slice_u8__suffix(v_s, v_dict_size);
    wuffs_private_impl__slice_u8__copy_from_slice(a_workbuf, v_s);
    self->private_impl.f_dict_workbuf_index = 0u;
  } else if (v_dict_workbuf_index > v_dict_size) {
    return wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
  } else {
    v_n_copied = wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__slice_u8__subslice_ij(a_workbuf, v_dict_workbuf_index, v_dict_size), v_s);
    if (v_n_copied < ((uint64_t)(v_s.len))) {
      v_n = wuffs_private_impl__slice_u8__copy_from_slice(a_workbuf, wuffs_base__slice_u8__subslice_i(v_s, v_n_copied));
      self->private_impl.f_dict_workbuf_index = ((uint32_t)(v_n));
    } else {
      v_n = ((uint64_t)(v_dict_workbuf_index + v_n_copied));
      if (v_n < v_dict_size) {
        self->private_impl.f_dict_workbuf_index = ((uint32_t)(v_n));
      } else {
        self->private_impl.f_dict_workbuf_index = 0u;
      }
    }
  }
  if ((273u > v_dict_size) || (v_dict_size > ((uint64_t)(a_workbuf.len)))) {
    return wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
  }
  wuffs_private_impl__slice_u8__copy_from_slice(wuffs_base__slice_u8__subslice_i(a_workbuf, v_dict_size), wuffs_base__slice_u8__subslice_j(a_workbuf, 273u));
  return wuffs_base__make_status(NULL);
}

// -------- func lzma.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_lzma__decoder__get_quirk(
    const wuffs_lzma__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (a_key == 1290294272u) {
    if (self->private_impl.f_allow_non_zero_initial_byte) {
      return 1u;
    }
  } else if (a_key == 1290294273u) {
    return ((uint64_t)(self->private_impl.f_format_extension));
  }
  return 0u;
}

// -------- func lzma.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzma__decoder__set_quirk(
    wuffs_lzma__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  uint32_t v_v = 0;
  uint32_t v_n = 0;

  if (a_key == 1290294272u) {
    self->private_impl.f_allow_non_zero_initial_byte = (a_value > 0u);
  } else if (a_key == 1290294273u) {
    if (a_value == 0u) {
      self->private_impl.f_format_extension = 0u;
      return wuffs_base__make_status(NULL);
    } else if ((a_value & 255u) == 1u) {
      if ((a_value >> 8u) <= 255u) {
        self->private_impl.f_format_extension = ((uint32_t)(a_value));
        v_v = (self->private_impl.f_format_extension >> 8u);
        v_n = (((uint32_t)(1u)) << (v_v & 31u));
        wuffs_private_impl__u32__sat_sub_indirect(&v_n, ((v_n >> 4u) * ((v_v >> 5u) & 7u)));
        if ((v_n < 4096u) || (536870912u < v_n)) {
          return wuffs_base__make_status(wuffs_base__error__bad_argument);
        }
        self->private_impl.f_dict_size = v_n;
        return wuffs_base__make_status(NULL);
      }
    } else if ((a_value & 255u) == 2u) {
      if ((a_value >> 8u) <= 40u) {
        self->private_impl.f_format_extension = ((uint32_t)(a_value));
        v_v = (self->private_impl.f_format_extension >> 8u);
        if (v_v < 40u) {
          self->private_impl.f_dict_size = ((2u | (v_v & 1u)) << ((v_v >> 1u) + 11u));
        } else {
          self->private_impl.f_dict_size = 4294967295u;
        }
        return wuffs_base__make_status(NULL);
      }
    }
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func lzma.decoder.dst_history_retain_length

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_lzma__decoder__dst_history_retain_length(
    const wuffs_lzma__decoder* self) {
  if (!self) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }

  return wuffs_base__utility__make_optional_u63(true, 0u);
}

// -------- func lzma.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_lzma__decoder__workbuf_len(
    const wuffs_lzma__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  uint64_t v_m = 0;

  if (self->private_impl.f_dict_size == 0u) {
    return wuffs_base__utility__make_range_ii_u64(0u, 0u);
  }
  v_m = (((uint64_t)(self->private_impl.f_dict_size)) + 273u);
  return wuffs_base__utility__make_range_ii_u64(v_m, v_m);
}

// -------- func lzma.decoder.transform_io

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzma__decoder__transform_io(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_mark = 0;
  wuffs_base__status v_dti_status = wuffs_base__make_status(NULL);
  wuffs_base__status v_ah_status = wuffs_base__make_status(NULL);

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }

  uint32_t coro_susp_point = self->private_impl.p_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      v_mark = ((uint64_t)(iop_a_dst - io0_a_dst));
      {
        if (a_dst) {
          a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
        }
        wuffs_base__status t_0 = wuffs_lzma__decoder__do_transform_io(self, a_dst, a_src, a_workbuf);
        v_dti_status = t_0;
        if (a_dst) {
          iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
        }
      }
      if ( ! wuffs_base__status__is_suspension(&v_dti_status)) {
        status = v_dti_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      } else if ((v_dti_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_lzma__error__truncated_input);
        goto exit;
      }
      v_ah_status = wuffs_lzma__decoder__add_history(self, wuffs_private_impl__io__since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst), a_workbuf);
      if (wuffs_base__status__is_error(&v_ah_status)) {
        status = v_ah_status;
        goto exit;
      }
      status = v_dti_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }

  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func lzma.decoder.do_transform_io

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__do_transform_io(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_header_byte = 0;
  uint8_t v_c8 = 0;
  uint32_t v_c32 = 0;
  uint8_t v_prop_byte = 0;
  uint32_t v_lc = 0;
  uint32_t v_lp = 0;
  uint32_t v_pb = 0;
  uint32_t v_length = 0;
  uint32_t v_n_copied = 0;
  uint64_t v_smark = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_transform_io;
  if (coro_susp_point) {
    v_header_byte = self->private_data.s_do_transform_io.v_header_byte;
    v_length = self->private_data.s_do_transform_io.v_length;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_lzma2_need_prob_reset = true;
    self->private_impl.f_lzma2_need_properties = true;
    self->private_impl.f_lzma2_need_dict_reset = true;
    while (true) {
      if ((self->private_impl.f_format_extension & 255u) == 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_0 = *iop_a_src++;
          v_prop_byte = t_0;
        }
        if (v_prop_byte >= 225u) {
          status = wuffs_base__make_status(wuffs_lzma__error__bad_header);
          goto exit;
        }
        v_lc = ((uint32_t)(((uint8_t)(v_prop_byte % 9u))));
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_prop_byte /= 9u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        v_lp = ((uint32_t)(((uint8_t)(v_prop_byte % 5u))));
        v_pb = ((uint32_t)(((uint8_t)(v_prop_byte / 5u))));
        if ((v_lc + v_lp) > 4u) {
          status = wuffs_base__make_status(wuffs_lzma__error__unsupported_properties);
          goto exit;
        }
        self->private_impl.f_lc = wuffs_base__u32__min(v_lc, 4u);
        self->private_impl.f_lp = v_lp;
        self->private_impl.f_pb = v_pb;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          uint32_t t_1;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_1 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_do_transform_io.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
              uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
              *scratch <<= 8;
              *scratch >>= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
              if (num_bits_1 == 24) {
                t_1 = ((uint32_t)(*scratch));
                break;
              }
              num_bits_1 += 8u;
              *scratch |= ((uint64_t)(num_bits_1)) << 56;
            }
          }
          v_c32 = t_1;
        }
        self->private_impl.f_dict_size = wuffs_base__u32__max(v_c32, 4096u);
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          uint64_t t_2;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
            t_2 = wuffs_base__peek_u64le__no_bounds_check(iop_a_src);
            iop_a_src += 8;
          } else {
            self->private_data.s_do_transform_io.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
              uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
              *scratch <<= 8;
              *scratch >>= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
              if (num_bits_2 == 56) {
                t_2 = ((uint64_t)(*scratch));
                break;
              }
              num_bits_2 += 8u;
              *scratch |= ((uint64_t)(num_bits_2)) << 56;
            }
          }
          self->private_impl.f_decoded_length = t_2;
        }
        if ((self->private_impl.f_decoded_length >= 9223372036854775808u) && (self->private_impl.f_decoded_length != 18446744073709551615u)) {
          status = wuffs_base__make_status(wuffs_lzma__error__unsupported_decoded_length);
          goto exit;
        }
        wuffs_lzma__decoder__initialize_probs(self);
      } else if ((self->private_impl.f_format_extension & 255u) == 1u) {
        self->private_impl.f_lc = 3u;
        self->private_impl.f_lp = 0u;
        self->private_impl.f_pb = 2u;
        self->private_impl.f_decoded_length = 18446744073709551615u;
        wuffs_lzma__decoder__initialize_probs(self);
      } else {
        while (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(6);
        }
        if (wuffs_base__peek_u8be__no_bounds_check(iop_a_src) == 0u) {
          iop_a_src += 1u;
          break;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_3 = *iop_a_src++;
          v_header_byte = t_3;
        }
        if (v_header_byte < 128u) {
          if (v_header_byte < 2u) {
            self->private_impl.f_lzma2_need_prob_reset = true;
            self->private_impl.f_lzma2_need_properties = true;
            self->private_impl.f_lzma2_need_dict_reset = false;
            wuffs_lzma__decoder__initialize_dict(self);
          } else if ((v_header_byte > 2u) || self->private_impl.f_lzma2_need_dict_reset) {
            status = wuffs_base__make_status(wuffs_lzma__error__bad_lzma2_header);
            goto exit;
          }
          self->private_impl.f_prev_lzma2_chunk_was_uncompressed = true;
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
            uint32_t t_4;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
              t_4 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
              iop_a_src += 2;
            } else {
              self->private_data.s_do_transform_io.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
                uint32_t num_bits_4 = ((uint32_t)(*scratch & 0xFFu));
                *scratch >>= 8;
                *scratch <<= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_4);
                if (num_bits_4 == 8) {
                  t_4 = ((uint32_t)(*scratch >> 48));
                  break;
                }
                num_bits_4 += 8u;
                *scratch |= ((uint64_t)(num_bits_4));
              }
            }
            v_c32 = t_4;
          }
          v_length = (1u + v_c32);
          while (true) {
            v_n_copied = wuffs_private_impl__io_writer__limited_copy_u32_from_reader(
                &iop_a_dst, io2_a_dst,v_length, &iop_a_src, io2_a_src);
            wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_stashed_pos, ((uint64_t)(v_n_copied)));
            if (v_length <= v_n_copied) {
              break;
            }
            v_length -= v_n_copied;
            if (((uint64_t)(io2_a_dst - iop_a_dst)) == 0u) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_write);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10);
            } else {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(11);
            }
          }
          continue;
        }
        self->private_impl.f_decoded_length = ((uint64_t)(v_header_byte));
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
          uint32_t t_5;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
            t_5 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
            iop_a_src += 2;
          } else {
            self->private_data.s_do_transform_io.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
              uint32_t num_bits_5 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_5);
              if (num_bits_5 == 8) {
                t_5 = ((uint32_t)(*scratch >> 48));
                break;
              }
              num_bits_5 += 8u;
              *scratch |= ((uint64_t)(num_bits_5));
            }
          }
          v_c32 = t_5;
        }
        self->private_impl.f_decoded_length = (((self->private_impl.f_decoded_length & 31u) << 16u) + ((uint64_t)((1u + v_c32))));
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
          uint32_t t_6;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
            t_6 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
            iop_a_src += 2;
          } else {
            self->private_data.s_do_transform_io.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
              uint32_t num_bits_6 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_6);
              if (num_bits_6 == 8) {
                t_6 = ((uint32_t)(*scratch >> 48));
                break;
              }
              num_bits_6 += 8u;
              *scratch |= ((uint64_t)(num_bits_6));
            }
          }
          v_c32 = t_6;
        }
        self->private_impl.f_lzma2_encoded_length_want = ((uint64_t)((1u + v_c32)));
        if (v_header_byte >= 160u) {
          wuffs_lzma__decoder__initialize_probs(self);
          self->private_impl.f_lzma2_need_prob_reset = false;
        }
        if (v_header_byte >= 192u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_7 = *iop_a_src++;
            v_prop_byte = t_7;
          }
          if (v_prop_byte >= 225u) {
            status = wuffs_base__make_status(wuffs_lzma__error__bad_lzma2_header);
            goto exit;
          }
          v_lc = ((uint32_t)(((uint8_t)(v_prop_byte % 9u))));
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          v_prop_byte /= 9u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
          v_lp = ((uint32_t)(((uint8_t)(v_prop_byte % 5u))));
          v_pb = ((uint32_t)(((uint8_t)(v_prop_byte / 5u))));
          if ((v_lc + v_lp) > 4u) {
            status = wuffs_base__make_status(wuffs_lzma__error__bad_lzma2_header);
            goto exit;
          }
          self->private_impl.f_lc = wuffs_base__u32__min(v_lc, 4u);
          self->private_impl.f_lp = v_lp;
          self->private_impl.f_pb = v_pb;
          self->private_impl.f_lzma2_need_properties = false;
        }
        if (v_header_byte >= 224u) {
          self->private_impl.f_lzma2_need_dict_reset = false;
          wuffs_lzma__decoder__initialize_dict(self);
        } else if (self->private_impl.f_prev_lzma2_chunk_was_uncompressed) {
          if (a_dst) {
            a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(17);
          status = wuffs_lzma__decoder__update_stashed_bytes(self, a_dst, a_workbuf);
          if (a_dst) {
            iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
          }
          if (status.repr) {
            goto suspend;
          }
        }
        self->private_impl.f_prev_lzma2_chunk_was_uncompressed = false;
        if (self->private_impl.f_lzma2_need_prob_reset || self->private_impl.f_lzma2_need_properties || self->private_impl.f_lzma2_need_dict_reset) {
          status = wuffs_base__make_status(wuffs_lzma__error__bad_lzma2_header);
          goto exit;
        }
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(18);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_8 = *iop_a_src++;
        v_c8 = t_8;
      }
      if ((v_c8 != 0u) &&  ! self->private_impl.f_allow_non_zero_initial_byte) {
        status = wuffs_base__make_status(wuffs_lzma__error__bad_code);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(19);
        uint32_t t_9;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_9 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(20);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_9 = ((uint32_t)(*scratch & 0xFFu));
            *scratch >>= 8;
            *scratch <<= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_9);
            if (num_bits_9 == 24) {
              t_9 = ((uint32_t)(*scratch >> 32));
              break;
            }
            num_bits_9 += 8u;
            *scratch |= ((uint64_t)(num_bits_9));
          }
        }
        self->private_impl.f_stashed_bits = t_9;
      }
      if (self->private_impl.f_stashed_bits == 4294967295u) {
        status = wuffs_base__make_status(wuffs_lzma__error__bad_code);
        goto exit;
      }
      self->private_impl.f_stashed_range = 4294967295u;
      self->private_impl.f_stashed_pos_end = wuffs_base__u64__sat_add(self->private_impl.f_stashed_pos, self->private_impl.f_decoded_length);
      if ((self->private_impl.f_stashed_pos_end == 18446744073709551615u) && (self->private_impl.f_decoded_length != 18446744073709551615u)) {
        status = wuffs_base__make_status(wuffs_lzma__error__unsupported_decoded_length);
        goto exit;
      }
      self->private_impl.f_lzma2_encoded_length_have = 5u;
      while (((uint64_t)(a_workbuf.len)) < (((uint64_t)(self->private_impl.f_dict_size)) + 273u)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_workbuf);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(21);
      }
      while (true) {
        v_smark = ((uint64_t)(iop_a_src - io0_a_src));
        {
          if (a_dst) {
            a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
          }
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          wuffs_base__status t_10 = wuffs_lzma__decoder__decode_bitstream(self, a_dst, a_src, a_workbuf);
          v_status = t_10;
          if (a_dst) {
            iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
          }
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_lzma2_encoded_length_have, wuffs_private_impl__io__count_since(v_smark, ((uint64_t)(iop_a_src - io0_a_src))));
        if (wuffs_base__status__is_ok(&v_status)) {
          break;
        }
        status = v_status;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(22);
      }
      if (self->private_impl.f_decoded_length == 18446744073709551615u) {
        if (self->private_impl.f_stashed_bits != 0u) {
          status = wuffs_base__make_status(wuffs_lzma__error__bad_bitstream_trailer);
          goto exit;
        }
      } else if (self->private_impl.f_stashed_pos != self->private_impl.f_stashed_pos_end) {
        status = wuffs_base__make_status(wuffs_lzma__error__bad_decoded_length);
        goto exit;
      } else if (self->private_impl.f_stashed_bits != 0u) {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(23);
        status = wuffs_lzma__decoder__decode_optional_end_of_stream(self, a_src, a_workbuf);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
        if (self->private_impl.f_stashed_bits != 0u) {
          status = wuffs_base__make_status(wuffs_lzma__error__bad_bitstream_trailer);
          goto exit;
        }
      }
      if ((self->private_impl.f_format_extension & 255u) < 2u) {
        break;
      } else if (self->private_impl.f_lzma2_encoded_length_have != self->private_impl.f_lzma2_encoded_length_want) {
        status = wuffs_base__make_status(wuffs_lzma__error__bad_lzma2_header);
        goto exit;
      }
    }

    ok:
    self->private_impl.p_do_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_transform_io.v_header_byte = v_header_byte;
  self->private_data.s_do_transform_io.v_length = v_length;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func lzma.decoder.decode_bitstream

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__decode_bitstream(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_bitstream;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_end_of_chunk = false;
    while (true) {
      v_status = wuffs_lzma__decoder__decode_bitstream_fast(self, a_dst, a_src, a_workbuf);
      if (wuffs_base__status__is_error(&v_status)) {
        status = v_status;
        goto exit;
      }
      if (self->private_impl.f_end_of_chunk) {
        break;
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_lzma__decoder__decode_bitstream_slow(self, a_dst, a_src, a_workbuf);
      if (status.repr) {
        goto suspend;
      }
      if (self->private_impl.f_end_of_chunk) {
        break;
      }
    }

    goto ok;
    ok:
    self->private_impl.p_decode_bitstream = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_bitstream = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  return status;
}

// -------- func lzma.decoder.update_stashed_bytes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__update_stashed_bytes(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_dist = 0;
  uint32_t v_which = 0;
  uint32_t v_adj_dist = 0;
  uint64_t v_wb_index = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }

  uint32_t coro_susp_point = self->private_impl.p_update_stashed_bytes;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
      status = wuffs_base__make_status(wuffs_base__suspension__short_write);
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }
    v_dist = 1u;
    v_which = 0u;
    while (v_which < 2u) {
      if (((uint64_t)(v_dist)) <= ((uint64_t)(iop_a_dst - io0_a_dst))) {
        wuffs_private_impl__io_writer__limited_copy_u32_from_history(
            &iop_a_dst, io0_a_dst, io2_a_dst, 1u, v_dist);
        if ( ! (iop_a_dst > io1_a_dst)) {
          status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
          goto exit;
        }
        self->private_impl.f_stashed_bytes[v_which] = iop_a_dst[-1];
        iop_a_dst--;
      } else {
        v_adj_dist = ((uint32_t)((((uint64_t)(v_dist)) - ((uint64_t)(iop_a_dst - io0_a_dst)))));
        v_wb_index = ((uint64_t)(((uint64_t)(self->private_impl.f_dict_workbuf_index)) - ((uint64_t)(v_adj_dist))));
        while (v_wb_index >= 9223372036854775808u) {
          v_wb_index += ((uint64_t)(self->private_impl.f_dict_size));
        }
        if (v_wb_index >= ((uint64_t)(a_workbuf.len))) {
          status = wuffs_base__make_status(wuffs_lzma__error__internal_error_inconsistent_dictionary_state);
          goto exit;
        }
        self->private_impl.f_stashed_bytes[v_which] = a_workbuf.ptr[v_wb_index];
      }
      v_dist = (1u + self->private_impl.f_stashed_rep0);
      v_which += 1u;
    }

    ok:
    self->private_impl.p_update_stashed_bytes = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_update_stashed_bytes = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }

  return status;
}

// -------- func lzma.decoder.decode_optional_end_of_stream

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzma__decoder__decode_optional_end_of_stream(
    wuffs_lzma__decoder* self,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__io_buffer u_w = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_w = &u_w;
  uint8_t* iop_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io0_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_optional_end_of_stream;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_stashed_pos_end = 18446744073709551615u;
    while (true) {
      {
        wuffs_base__io_buffer* o_0_v_w = v_w;
        uint8_t* o_0_iop_v_w = iop_v_w;
        uint8_t* o_0_io0_v_w = io0_v_w;
        uint8_t* o_0_io1_v_w = io1_v_w;
        uint8_t* o_0_io2_v_w = io2_v_w;
        v_w = wuffs_private_impl__io_writer__set(
            &u_w,
            &iop_v_w,
            &io0_v_w,
            &io1_v_w,
            &io2_v_w,
            wuffs_base__utility__empty_slice_u8(),
            0u);
        {
          wuffs_base__status t_0 = wuffs_lzma__decoder__decode_bitstream_slow(self, v_w, a_src, a_workbuf);
          v_status = t_0;
        }
        v_w = o_0_v_w;
        iop_v_w = o_0_iop_v_w;
        io0_v_w = o_0_io0_v_w;
        io1_v_w = o_0_io1_v_w;
        io2_v_w = o_0_io2_v_w;
      }
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      } else if (v_status.repr == wuffs_base__suspension__short_write) {
        status = wuffs_base__make_status(wuffs_lzma__error__bad_bitstream_trailer);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }
    self->private_impl.f_stashed_pos_end = self->private_impl.f_stashed_pos;

    ok:
    self->private_impl.p_decode_optional_end_of_stream = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_optional_end_of_stream = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  return status;
}

// -------- func lzma.decoder.initialize_dict

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_lzma__decoder__initialize_dict(
    wuffs_lzma__decoder* self) {
  self->private_impl.f_dict_workbuf_index = 0u;
  self->private_impl.f_dict_seen = 0u;
  self->private_impl.f_stashed_bytes[0u] = 0u;
  self->private_impl.f_stashed_bytes[1u] = 0u;
  self->private_impl.f_stashed_pos = 0u;
  return wuffs_base__make_empty_struct();
}

// -------- func lzma.decoder.initialize_probs

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_lzma__decoder__initialize_probs(
    wuffs_lzma__decoder* self) {
  uint32_t v_i = 0;
  uint32_t v_j = 0;

  v_i = 0u;
  while (v_i < 192u) {
    self->private_data.f_probs_ao00[v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 12u) {
    self->private_data.f_probs_ao20[v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 12u) {
    self->private_data.f_probs_ao40[v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 192u) {
    self->private_data.f_probs_ao41[v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 12u) {
    self->private_data.f_probs_ao60[v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 12u) {
    self->private_data.f_probs_ao63[v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 16u) {
    v_j = 0u;
    while (v_j < 8u) {
      self->private_data.f_probs_match_len_low[v_i][v_j] = 1024u;
      v_j += 1u;
    }
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 16u) {
    v_j = 0u;
    while (v_j < 8u) {
      self->private_data.f_probs_match_len_mid[v_i][v_j] = 1024u;
      v_j += 1u;
    }
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 256u) {
    self->private_data.f_probs_match_len_high[0u][v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 16u) {
    v_j = 0u;
    while (v_j < 8u) {
      self->private_data.f_probs_longrep_len_low[v_i][v_j] = 1024u;
      v_j += 1u;
    }
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 16u) {
    v_j = 0u;
    while (v_j < 8u) {
      self->private_data.f_probs_longrep_len_mid[v_i][v_j] = 1024u;
      v_j += 1u;
    }
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 256u) {
    self->private_data.f_probs_longrep_len_high[0u][v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 4u) {
    v_j = 0u;
    while (v_j < 64u) {
      self->private_data.f_probs_slot[v_i][v_j] = 1024u;
      v_j += 1u;
    }
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 128u) {
    self->private_data.f_probs_small_dist[v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 16u) {
    self->private_data.f_probs_large_dist[v_i] = 1024u;
    v_i += 1u;
  }
  v_i = 0u;
  while (v_i < 16u) {
    v_j = 0u;
    while (v_j < 768u) {
      self->private_data.f_probs_lit[v_i][v_j] = 1024u;
      v_j += 1u;
    }
    v_i += 1u;
  }
  self->private_impl.f_stashed_state = 0u;
  self->private_impl.f_stashed_rep0 = 0u;
  self->private_impl.f_stashed_rep1 = 0u;
  self->private_impl.f_stashed_rep2 = 0u;
  self->private_impl.f_stashed_rep3 = 0u;
  return wuffs_base__make_empty_struct();
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZMA)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZIP)

// ---------------- Status Codes Implementations

const char wuffs_lzip__error__bad_checksum[] = "#lzip: bad checksum";
const char wuffs_lzip__error__bad_footer[] = "#lzip: bad footer";
const char wuffs_lzip__error__bad_header[] = "#lzip: bad header";
const char wuffs_lzip__error__truncated_input[] = "#lzip: truncated input";

// ---------------- Private Consts

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzip__decoder__do_transform_io(
    wuffs_lzip__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

// ---------------- VTables

const wuffs_base__io_transformer__func_ptrs
wuffs_lzip__decoder__func_ptrs_for__wuffs_base__io_transformer = {
  (wuffs_base__optional_u63(*)(const void*))(&wuffs_lzip__decoder__dst_history_retain_length),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_lzip__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_lzip__decoder__set_quirk),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_lzip__decoder__transform_io),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_lzip__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_lzip__decoder__initialize(
    wuffs_lzip__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  {
    wuffs_base__status z = wuffs_crc32__ieee_hasher__initialize(
        &self->private_data.f_crc32, sizeof(self->private_data.f_crc32), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  {
    wuffs_base__status z = wuffs_lzma__decoder__initialize(
        &self->private_data.f_lzma, sizeof(self->private_data.f_lzma), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__io_transformer.vtable_name =
      wuffs_base__io_transformer__vtable_name;
  self->private_impl.vtable_for__wuffs_base__io_transformer.function_pointers =
      (const void*)(&wuffs_lzip__decoder__func_ptrs_for__wuffs_base__io_transformer);
  return wuffs_base__make_status(NULL);
}

wuffs_lzip__decoder*
wuffs_lzip__decoder__alloc(void) {
  wuffs_lzip__decoder* x =
      (wuffs_lzip__decoder*)(calloc(1, sizeof(wuffs_lzip__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_lzip__decoder__initialize(
      x, sizeof(wuffs_lzip__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_lzip__decoder(void) {
  return sizeof(wuffs_lzip__decoder);
}

// ---------------- Function Implementations

// -------- func lzip.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_lzip__decoder__get_quirk(
    const wuffs_lzip__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if ((a_key == 1u) && self->private_impl.f_ignore_checksum) {
    return 1u;
  }
  return 0u;
}

// -------- func lzip.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzip__decoder__set_quirk(
    wuffs_lzip__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (a_key == 1u) {
    self->private_impl.f_ignore_checksum = (a_value > 0u);
    return wuffs_base__make_status(NULL);
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func lzip.decoder.dst_history_retain_length

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_lzip__decoder__dst_history_retain_length(
    const wuffs_lzip__decoder* self) {
  if (!self) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }

  return wuffs_lzma__decoder__dst_history_retain_length(&self->private_data.f_lzma);
}

// -------- func lzip.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_lzip__decoder__workbuf_len(
    const wuffs_lzip__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_lzma__decoder__workbuf_len(&self->private_data.f_lzma);
}

// -------- func lzip.decoder.transform_io

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzip__decoder__transform_io(
    wuffs_lzip__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_lzip__decoder__do_transform_io(self, a_dst, a_src, a_workbuf);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_lzip__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func lzip.decoder.do_transform_io

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzip__decoder__do_transform_io(
    wuffs_lzip__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_c32 = 0;
  uint64_t v_c64 = 0;
  uint64_t v_dmark = 0;
  uint64_t v_smark = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint32_t v_checksum_want = 0;
  uint32_t v_checksum_have = 0;
  uint64_t v_size_want = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        uint64_t t_0;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 5)) {
          t_0 = ((uint64_t)(wuffs_base__peek_u40le__no_bounds_check(iop_a_src)));
          iop_a_src += 5;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
            if (num_bits_0 == 32) {
              t_0 = ((uint64_t)(*scratch));
              break;
            }
            num_bits_0 += 8u;
            *scratch |= ((uint64_t)(num_bits_0)) << 56;
          }
        }
        v_c64 = t_0;
      }
      if (v_c64 != 5641951820u) {
        status = wuffs_base__make_status(wuffs_lzip__error__bad_header);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_1 = *iop_a_src++;
        v_c8 = t_1;
      }
      v_status = wuffs_lzma__decoder__set_quirk(&self->private_data.f_lzma, 1290294273u, (1u | (((uint64_t)(v_c8)) << 8u)));
      if ( ! wuffs_base__status__is_ok(&v_status)) {
        if (v_status.repr == wuffs_base__error__bad_argument) {
          status = wuffs_base__make_status(wuffs_lzip__error__bad_header);
          goto exit;
        }
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      }
      self->private_impl.f_ssize_have = 0u;
      self->private_impl.f_dsize_have = 0u;
      wuffs_lzma__decoder__set_quirk(&self->private_data.f_lzma, 1290294272u, 1u);
      while (true) {
        v_dmark = ((uint64_t)(iop_a_dst - io0_a_dst));
        v_smark = ((uint64_t)(iop_a_src - io0_a_src));
        {
          if (a_dst) {
            a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
          }
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          wuffs_base__status t_2 = wuffs_lzma__decoder__transform_io(&self->private_data.f_lzma, a_dst, a_src, a_workbuf);
          v_status = t_2;
          if (a_dst) {
            iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
          }
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        self->private_impl.f_ssize_have += wuffs_private_impl__io__count_since(v_smark, ((uint64_t)(iop_a_src - io0_a_src)));
        self->private_impl.f_dsize_have += wuffs_private_impl__io__count_since(v_dmark, ((uint64_t)(iop_a_dst - io0_a_dst)));
        if ( ! self->private_impl.f_ignore_checksum) {
          wuffs_crc32__ieee_hasher__update(&self->private_data.f_crc32, wuffs_private_impl__io__since(v_dmark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst));
        }
        if (wuffs_base__status__is_ok(&v_status)) {
          break;
        }
        status = v_status;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4);
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
        uint32_t t_3;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_3 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_3 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_3;
            if (num_bits_3 == 24) {
              t_3 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_3 += 8u;
            *scratch |= ((uint64_t)(num_bits_3)) << 56;
          }
        }
        v_checksum_want = t_3;
      }
      if ( ! self->private_impl.f_ignore_checksum) {
        v_checksum_have = wuffs_crc32__ieee_hasher__checksum_u32(&self->private_data.f_crc32);
        if (v_checksum_have != v_checksum_want) {
          status = wuffs_base__make_status(wuffs_lzip__error__bad_checksum);
          goto exit;
        }
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
        uint64_t t_4;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
          t_4 = wuffs_base__peek_u64le__no_bounds_check(iop_a_src);
          iop_a_src += 8;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_4 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4;
            if (num_bits_4 == 56) {
              t_4 = ((uint64_t)(*scratch));
              break;
            }
            num_bits_4 += 8u;
            *scratch |= ((uint64_t)(num_bits_4)) << 56;
          }
        }
        v_size_want = t_4;
      }
      if (self->private_impl.f_dsize_have != v_size_want) {
        status = wuffs_base__make_status(wuffs_lzip__error__bad_footer);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
        uint64_t t_5;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
          t_5 = wuffs_base__peek_u64le__no_bounds_check(iop_a_src);
          iop_a_src += 8;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_5 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_5;
            if (num_bits_5 == 56) {
              t_5 = ((uint64_t)(*scratch));
              break;
            }
            num_bits_5 += 8u;
            *scratch |= ((uint64_t)(num_bits_5)) << 56;
          }
        }
        v_size_want = t_5;
      }
      if ((v_size_want < 26u) || (2251799813685248u < v_size_want)) {
        status = wuffs_base__make_status(wuffs_lzip__error__bad_footer);
        goto exit;
      } else if (self->private_impl.f_ssize_have != (v_size_want - 26u)) {
        status = wuffs_base__make_status(wuffs_lzip__error__bad_footer);
        goto exit;
      }
      while (((uint64_t)(io2_a_src - iop_a_src)) < 4u) {
        if (a_src && a_src->meta.closed) {
          goto label__outer__break;
        }
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(11);
      }
      v_c32 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
      if (v_c32 != 1346984524u) {
        break;
      }
      wuffs_private_impl__ignore_status(wuffs_crc32__ieee_hasher__initialize(&self->private_data.f_crc32,
          sizeof (wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
      wuffs_private_impl__ignore_status(wuffs_lzma__decoder__initialize(&self->private_data.f_lzma,
          sizeof (wuffs_lzma__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
    }
    label__outer__break:;

    ok:
    self->private_impl.p_do_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZIP)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZW)

// ---------------- Status Codes Implementations

const char wuffs_lzw__error__bad_code[] = "#lzw: bad code";
const char wuffs_lzw__error__truncated_input[] = "#lzw: truncated input";
const char wuffs_lzw__error__internal_error_inconsistent_i_o[] = "#lzw: internal error: inconsistent I/O";

// ---------------- Private Consts

#define WUFFS_LZW__QUIRKS_BASE 1290672128u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_lzw__decoder__read_from(
    wuffs_lzw__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzw__decoder__write_to(
    wuffs_lzw__decoder* self,
    wuffs_base__io_buffer* a_dst);

// ---------------- VTables

const wuffs_base__io_transformer__func_ptrs
wuffs_lzw__decoder__func_ptrs_for__wuffs_base__io_transformer = {
  (wuffs_base__optional_u63(*)(const void*))(&wuffs_lzw__decoder__dst_history_retain_length),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_lzw__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_lzw__decoder__set_quirk),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_lzw__decoder__transform_io),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_lzw__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_lzw__decoder__initialize(
    wuffs_lzw__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__io_transformer.vtable_name =
      wuffs_base__io_transformer__vtable_name;
  self->private_impl.vtable_for__wuffs_base__io_transformer.function_pointers =
      (const void*)(&wuffs_lzw__decoder__func_ptrs_for__wuffs_base__io_transformer);
  return wuffs_base__make_status(NULL);
}

wuffs_lzw__decoder*
wuffs_lzw__decoder__alloc(void) {
  wuffs_lzw__decoder* x =
      (wuffs_lzw__decoder*)(calloc(1, sizeof(wuffs_lzw__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_lzw__decoder__initialize(
      x, sizeof(wuffs_lzw__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_lzw__decoder(void) {
  return sizeof(wuffs_lzw__decoder);
}

// ---------------- Function Implementations

// -------- func lzw.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_lzw__decoder__get_quirk(
    const wuffs_lzw__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (a_key == 1290672128u) {
    return ((uint64_t)(self->private_impl.f_pending_literal_width_plus_one));
  }
  return 0u;
}

// -------- func lzw.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzw__decoder__set_quirk(
    wuffs_lzw__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (a_key == 1290672128u) {
    if (a_value > 9u) {
      return wuffs_base__make_status(wuffs_base__error__bad_argument);
    }
    self->private_impl.f_pending_literal_width_plus_one = ((uint32_t)(a_value));
    return wuffs_base__make_status(NULL);
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func lzw.decoder.dst_history_retain_length

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_lzw__decoder__dst_history_retain_length(
    const wuffs_lzw__decoder* self) {
  if (!self) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }

  return wuffs_base__utility__make_optional_u63(true, 0u);
}

// -------- func lzw.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_lzw__decoder__workbuf_len(
    const wuffs_lzw__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

// -------- func lzw.decoder.transform_io

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_lzw__decoder__transform_io(
    wuffs_lzw__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_i = 0;

  uint32_t coro_susp_point = self->private_impl.p_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_literal_width = 8u;
    if (self->private_impl.f_pending_literal_width_plus_one > 0u) {
      self->private_impl.f_literal_width = (self->private_impl.f_pending_literal_width_plus_one - 1u);
    }
    self->private_impl.f_clear_code = (((uint32_t)(1u)) << self->private_impl.f_literal_width);
    self->private_impl.f_end_code = (self->private_impl.f_clear_code + 1u);
    self->private_impl.f_save_code = self->private_impl.f_end_code;
    self->private_impl.f_prev_code = self->private_impl.f_end_code;
    self->private_impl.f_width = (self->private_impl.f_literal_width + 1u);
    self->private_impl.f_bits = 0u;
    self->private_impl.f_n_bits = 0u;
    self->private_impl.f_output_ri = 0u;
    self->private_impl.f_output_wi = 0u;
    v_i = 0u;
    while (v_i < self->private_impl.f_clear_code) {
      self->private_data.f_lm1s[v_i] = 0u;
      self->private_data.f_suffixes[v_i][0u] = ((uint8_t)(v_i));
      v_i += 1u;
    }
    while (true) {
      wuffs_lzw__decoder__read_from(self, a_src);
      if (self->private_impl.f_output_wi > 0u) {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        status = wuffs_lzw__decoder__write_to(self, a_dst);
        if (status.repr) {
          goto suspend;
        }
      }
      if (self->private_impl.f_read_from_return_value == 0u) {
        break;
      } else if (self->private_impl.f_read_from_return_value == 1u) {
        continue;
      } else if (self->private_impl.f_read_from_return_value == 2u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
      } else if (self->private_impl.f_read_from_return_value == 3u) {
        status = wuffs_base__make_status(wuffs_lzw__error__truncated_input);
        goto exit;
      } else if (self->private_impl.f_read_from_return_value == 4u) {
        status = wuffs_base__make_status(wuffs_lzw__error__bad_code);
        goto exit;
      } else {
        status = wuffs_base__make_status(wuffs_lzw__error__internal_error_inconsistent_i_o);
        goto exit;
      }
    }

    ok:
    self->private_impl.p_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func lzw.decoder.read_from

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_lzw__decoder__read_from(
    wuffs_lzw__decoder* self,
    wuffs_base__io_buffer* a_src) {
  uint32_t v_clear_code = 0;
  uint32_t v_end_code = 0;
  uint32_t v_save_code = 0;
  uint32_t v_prev_code = 0;
  uint32_t v_width = 0;
  uint32_t v_bits = 0;
  uint32_t v_n_bits = 0;
  uint32_t v_output_wi = 0;
  uint32_t v_code = 0;
  uint32_t v_c = 0;
  uint32_t v_o = 0;
  uint32_t v_steps = 0;
  uint8_t v_first_byte = 0;
  uint16_t v_lm1_b = 0;
  uint16_t v_lm1_a = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_clear_code = self->private_impl.f_clear_code;
  v_end_code = self->private_impl.f_end_code;
  v_save_code = self->private_impl.f_save_code;
  v_prev_code = self->private_impl.f_prev_code;
  v_width = self->private_impl.f_width;
  v_bits = self->private_impl.f_bits;
  v_n_bits = self->private_impl.f_n_bits;
  v_output_wi = self->private_impl.f_output_wi;
  while (true) {
    if (v_n_bits < v_width) {
      if (((uint64_t)(io2_a_src - iop_a_src)) >= 4u) {
        v_bits |= ((uint32_t)(wuffs_base__peek_u32le__no_bounds_check(iop_a_src) << v_n_bits));
        iop_a_src += ((31u - v_n_bits) >> 3u);
        v_n_bits |= 24u;
      } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
        if (a_src && a_src->meta.closed) {
          self->private_impl.f_read_from_return_value = 3u;
        } else {
          self->private_impl.f_read_from_return_value = 2u;
        }
        break;
      } else {
        v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
        iop_a_src += 1u;
        v_n_bits += 8u;
        if (v_n_bits >= v_width) {
        } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
          if (a_src && a_src->meta.closed) {
            self->private_impl.f_read_from_return_value = 3u;
          } else {
            self->private_impl.f_read_from_return_value = 2u;
          }
          break;
        } else {
          v_bits |= (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) << v_n_bits);
          iop_a_src += 1u;
          v_n_bits += 8u;
          if (v_n_bits < v_width) {
            self->private_impl.f_read_from_return_value = 5u;
            break;
          }
        }
      }
    }
    v_code = ((v_bits) & WUFFS_PRIVATE_IMPL__LOW_BITS_MASK__U32(v_width));
    v_bits >>= v_width;
    v_n_bits -= v_width;
    if (v_code < v_clear_code) {
      self->private_data.f_output[v_output_wi] = ((uint8_t)(v_code));
      v_output_wi = ((v_output_wi + 1u) & 8191u);
      if (v_save_code <= 4095u) {
        v_lm1_a = ((uint16_t)(((uint16_t)(self->private_data.f_lm1s[v_prev_code] + 1u)) & 4095u));
        self->private_data.f_lm1s[v_save_code] = v_lm1_a;
        if (((uint16_t)(v_lm1_a % 8u)) != 0u) {
          self->private_impl.f_prefixes[v_save_code] = self->private_impl.f_prefixes[v_prev_code];
          memcpy(self->private_data.f_suffixes[v_save_code],self->private_data.f_suffixes[v_prev_code], sizeof(self->private_data.f_suffixes[v_save_code]));
          self->private_data.f_suffixes[v_save_code][((uint16_t)(v_lm1_a % 8u))] = ((uint8_t)(v_code));
        } else {
          self->private_impl.f_prefixes[v_save_code] = ((uint16_t)(v_prev_code));
          self->private_data.f_suffixes[v_save_code][0u] = ((uint8_t)(v_code));
        }
        v_save_code += 1u;
        if (v_width < 12u) {
          v_width += (1u & (v_save_code >> v_width));
        }
        v_prev_code = v_code;
      }
    } else if (v_code <= v_end_code) {
      if (v_code == v_end_code) {
        self->private_impl.f_read_from_return_value = 0u;
        break;
      }
      v_save_code = v_end_code;
      v_prev_code = v_end_code;
      v_width = (self->private_impl.f_literal_width + 1u);
    } else if (v_code <= v_save_code) {
      v_c = v_code;
      if (v_code == v_save_code) {
        v_c = v_prev_code;
      }
      v_o = ((v_output_wi + (((uint32_t)(self->private_data.f_lm1s[v_c])) & 4294967288u)) & 8191u);
      v_output_wi = ((v_output_wi + 1u + ((uint32_t)(self->private_data.f_lm1s[v_c]))) & 8191u);
      v_steps = (((uint32_t)(self->private_data.f_lm1s[v_c])) >> 3u);
      while (true) {
        memcpy((self->private_data.f_output)+(v_o), (self->private_data.f_suffixes[v_c]), 8u);
        if (v_steps <= 0u) {
          break;
        }
        v_steps -= 1u;
        v_o = (((uint32_t)(v_o - 8u)) & 8191u);
        v_c = ((uint32_t)(self->private_impl.f_prefixes[v_c]));
      }
      v_first_byte = self->private_data.f_suffixes[v_c][0u];
      if (v_code == v_save_code) {
        self->private_data.f_output[v_output_wi] = v_first_byte;
        v_output_wi = ((v_output_wi + 1u) & 8191u);
      }
      if (v_save_code <= 4095u) {
        v_lm1_b = ((uint16_t)(((uint16_t)(self->private_data.f_lm1s[v_prev_code] + 1u)) & 4095u));
        self->private_data.f_lm1s[v_save_code] = v_lm1_b;
        if (((uint16_t)(v_lm1_b % 8u)) != 0u) {
          self->private_impl.f_prefixes[v_save_code] = self->private_impl.f_prefixes[v_prev_code];
          memcpy(self->private_data.f_suffixes[v_save_code],self->private_data.f_suffixes[v_prev_code], sizeof(self->private_data.f_suffixes[v_save_code]));
          self->private_data.f_suffixes[v_save_code][((uint16_t)(v_lm1_b % 8u))] = v_first_byte;
        } else {
          self->private_impl.f_prefixes[v_save_code] = ((uint16_t)(v_prev_code));
          self->private_data.f_suffixes[v_save_code][0u] = ((uint8_t)(v_first_byte));
        }
        v_save_code += 1u;
        if (v_width < 12u) {
          v_width += (1u & (v_save_code >> v_width));
        }
        v_prev_code = v_code;
      }
    } else {
      self->private_impl.f_read_from_return_value = 4u;
      break;
    }
    if (v_output_wi > 4095u) {
      self->private_impl.f_read_from_return_value = 1u;
      break;
    }
  }
  if (self->private_impl.f_read_from_return_value != 2u) {
    while (v_n_bits >= 8u) {
      v_n_bits -= 8u;
      if (iop_a_src > io1_a_src) {
        iop_a_src--;
      } else {
        self->private_impl.f_read_from_return_value = 5u;
        break;
      }
    }
  }
  self->private_impl.f_save_code = v_save_code;
  self->private_impl.f_prev_code = v_prev_code;
  self->private_impl.f_width = v_width;
  self->private_impl.f_bits = v_bits;
  self->private_impl.f_n_bits = v_n_bits;
  self->private_impl.f_output_wi = v_output_wi;
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return wuffs_base__make_empty_struct();
}

// -------- func lzw.decoder.write_to

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_lzw__decoder__write_to(
    wuffs_lzw__decoder* self,
    wuffs_base__io_buffer* a_dst) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__slice_u8 v_s = {0};
  uint64_t v_n = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }

  uint32_t coro_susp_point = self->private_impl.p_write_to;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (self->private_impl.f_output_wi > 0u) {
      if (self->private_impl.f_output_ri > self->private_impl.f_output_wi) {
        status = wuffs_base__make_status(wuffs_lzw__error__internal_error_inconsistent_i_o);
        goto exit;
      }
      v_s = wuffs_base__make_slice_u8_ij(self->private_data.f_output,
          self->private_impl.f_output_ri,
          self->private_impl.f_output_wi);
      v_n = wuffs_private_impl__io_writer__copy_from_slice(&iop_a_dst, io2_a_dst,v_s);
      if (v_n == ((uint64_t)(v_s.len))) {
        self->private_impl.f_output_ri = 0u;
        self->private_impl.f_output_wi = 0u;
        status = wuffs_base__make_status(NULL);
        goto ok;
      }
      self->private_impl.f_output_ri = (((uint32_t)(self->private_impl.f_output_ri + ((uint32_t)(v_n)))) & 8191u);
      status = wuffs_base__make_status(wuffs_base__suspension__short_write);
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_write_to = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_write_to = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }

  return status;
}

// -------- func lzw.decoder.flush

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__slice_u8
wuffs_lzw__decoder__flush(
    wuffs_lzw__decoder* self) {
  if (!self) {
    return wuffs_base__empty_slice_u8();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__empty_slice_u8();
  }

  uint32_t v_ri = 0;
  uint32_t v_wi = 0;

  v_ri = self->private_impl.f_output_ri;
  v_wi = self->private_impl.f_output_wi;
  self->private_impl.f_output_ri = 0u;
  self->private_impl.f_output_wi = 0u;
  if (v_ri <= v_wi) {
    return wuffs_base__make_slice_u8_ij(self->private_data.f_output, v_ri, v_wi);
  }
  return wuffs_base__make_slice_u8(self->private_data.f_output, 0);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZW)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NETPBM)

// ---------------- Status Codes Implementations

const char wuffs_netpbm__error__bad_header[] = "#netpbm: bad header";
const char wuffs_netpbm__error__truncated_input[] = "#netpbm: truncated input";
const char wuffs_netpbm__error__unsupported_netpbm_file[] = "#netpbm: unsupported Netpbm file";
const char wuffs_netpbm__note__internal_note_short_read[] = "@netpbm: internal note: short read";

// ---------------- Private Consts

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_netpbm__decoder__do_decode_image_config(
    wuffs_netpbm__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_netpbm__decoder__do_decode_frame_config(
    wuffs_netpbm__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_netpbm__decoder__do_decode_frame(
    wuffs_netpbm__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_netpbm__decoder__swizzle(
    wuffs_netpbm__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_netpbm__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_netpbm__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_netpbm__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_netpbm__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_netpbm__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_netpbm__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_netpbm__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_netpbm__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_netpbm__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_netpbm__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_netpbm__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_netpbm__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_netpbm__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_netpbm__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_netpbm__decoder__initialize(
    wuffs_netpbm__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_netpbm__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_netpbm__decoder*
wuffs_netpbm__decoder__alloc(void) {
  wuffs_netpbm__decoder* x =
      (wuffs_netpbm__decoder*)(calloc(1, sizeof(wuffs_netpbm__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_netpbm__decoder__initialize(
      x, sizeof(wuffs_netpbm__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_netpbm__decoder(void) {
  return sizeof(wuffs_netpbm__decoder);
}

// ---------------- Function Implementations

// -------- func netpbm.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_netpbm__decoder__get_quirk(
    const wuffs_netpbm__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func netpbm.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__set_quirk(
    wuffs_netpbm__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func netpbm.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__decode_image_config(
    wuffs_netpbm__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_netpbm__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_netpbm__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func netpbm.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_netpbm__decoder__do_decode_image_config(
    wuffs_netpbm__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_n = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_c8 = t_0;
    }
    if (v_c8 != 80u) {
      status = wuffs_base__make_status(wuffs_netpbm__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_1 = *iop_a_src++;
      v_c8 = t_1;
    }
    if ((v_c8 < 49u) || (55u < v_c8)) {
      status = wuffs_base__make_status(wuffs_netpbm__error__bad_header);
      goto exit;
    } else if (v_c8 == 53u) {
      self->private_impl.f_pixfmt = 536870920u;
    } else if (v_c8 == 54u) {
      self->private_impl.f_pixfmt = 2684356744u;
    } else {
      status = wuffs_base__make_status(wuffs_netpbm__error__unsupported_netpbm_file);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_2 = *iop_a_src++;
      v_c8 = t_2;
    }
    if (v_c8 != 10u) {
      status = wuffs_base__make_status(wuffs_netpbm__error__bad_header);
      goto exit;
    }
    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_3 = *iop_a_src++;
        v_c8 = t_3;
      }
      if ((v_c8 == 32u) || (v_c8 == 9u)) {
        continue;
      } else if (v_c8 == 35u) {
        while (true) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_4 = *iop_a_src++;
            v_c8 = t_4;
          }
          if (v_c8 == 10u) {
            break;
          }
        }
        continue;
      } else if ((v_c8 < 48u) || (57u < v_c8)) {
        status = wuffs_base__make_status(wuffs_netpbm__error__bad_header);
        goto exit;
      }
      self->private_impl.f_width = ((uint32_t)(((uint8_t)(v_c8 - 48u))));
      break;
    }
    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_5 = *iop_a_src++;
        v_c8 = t_5;
      }
      if ((v_c8 == 32u) || (v_c8 == 9u)) {
        break;
      } else if ((v_c8 < 48u) || (57u < v_c8)) {
        status = wuffs_base__make_status(wuffs_netpbm__error__bad_header);
        goto exit;
      }
      v_n = ((10u * self->private_impl.f_width) + ((uint32_t)(((uint8_t)(v_c8 - 48u)))));
      if (v_n > 16777215u) {
        status = wuffs_base__make_status(wuffs_netpbm__error__unsupported_netpbm_file);
        goto exit;
      }
      self->private_impl.f_width = v_n;
    }
    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_6 = *iop_a_src++;
        v_c8 = t_6;
      }
      if ((v_c8 == 32u) || (v_c8 == 9u)) {
        continue;
      } else if (v_c8 == 35u) {
        while (true) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_7 = *iop_a_src++;
            v_c8 = t_7;
          }
          if (v_c8 == 10u) {
            break;
          }
        }
        continue;
      } else if ((v_c8 < 48u) || (57u < v_c8)) {
        status = wuffs_base__make_status(wuffs_netpbm__error__bad_header);
        goto exit;
      }
      self->private_impl.f_height = ((uint32_t)(((uint8_t)(v_c8 - 48u))));
      break;
    }
    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_8 = *iop_a_src++;
        v_c8 = t_8;
      }
      if ((v_c8 == 32u) || (v_c8 == 9u) || (v_c8 == 13u)) {
        continue;
      } else if (v_c8 == 10u) {
        break;
      } else if ((v_c8 < 48u) || (57u < v_c8)) {
        status = wuffs_base__make_status(wuffs_netpbm__error__bad_header);
        goto exit;
      }
      v_n = ((10u * self->private_impl.f_height) + ((uint32_t)(((uint8_t)(v_c8 - 48u)))));
      if (v_n > 16777215u) {
        status = wuffs_base__make_status(wuffs_netpbm__error__unsupported_netpbm_file);
        goto exit;
      }
      self->private_impl.f_height = v_n;
    }
    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_9 = *iop_a_src++;
        v_c8 = t_9;
      }
      if ((v_c8 == 32u) || (v_c8 == 9u)) {
        continue;
      } else if (v_c8 == 35u) {
        while (true) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_10 = *iop_a_src++;
            v_c8 = t_10;
          }
          if (v_c8 == 10u) {
            break;
          }
        }
        continue;
      } else if ((v_c8 < 48u) || (57u < v_c8)) {
        status = wuffs_base__make_status(wuffs_netpbm__error__bad_header);
        goto exit;
      }
      self->private_impl.f_max_value = ((uint32_t)(((uint8_t)(v_c8 - 48u))));
      break;
    }
    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_11 = *iop_a_src++;
        v_c8 = t_11;
      }
      if ((v_c8 == 32u) || (v_c8 == 9u) || (v_c8 == 13u)) {
        continue;
      } else if (v_c8 == 10u) {
        break;
      } else if ((v_c8 < 48u) || (57u < v_c8)) {
        status = wuffs_base__make_status(wuffs_netpbm__error__bad_header);
        goto exit;
      }
      v_n = ((10u * self->private_impl.f_max_value) + ((uint32_t)(((uint8_t)(v_c8 - 48u)))));
      if (v_n > 16777215u) {
        status = wuffs_base__make_status(wuffs_netpbm__error__unsupported_netpbm_file);
        goto exit;
      }
      self->private_impl.f_max_value = v_n;
    }
    if (self->private_impl.f_max_value != 255u) {
      status = wuffs_base__make_status(wuffs_netpbm__error__unsupported_netpbm_file);
      goto exit;
    }
    self->private_impl.f_frame_config_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          self->private_impl.f_pixfmt,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          self->private_impl.f_frame_config_io_position,
          false);
    }
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func netpbm.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__decode_frame_config(
    wuffs_netpbm__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_netpbm__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_netpbm__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func netpbm.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_netpbm__decoder__do_decode_frame_config(
    wuffs_netpbm__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_netpbm__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (self->private_impl.f_frame_config_io_position != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          self->private_impl.f_frame_config_io_position,
          0u,
          false,
          false,
          0u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func netpbm.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__decode_frame(
    wuffs_netpbm__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_netpbm__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_netpbm__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func netpbm.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_netpbm__decoder__do_decode_frame(
    wuffs_netpbm__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_netpbm__decoder__do_decode_frame_config(self, NULL, a_src);
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    self->private_impl.f_dst_x = 0u;
    self->private_impl.f_dst_y = 0u;
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette(a_dst),
        wuffs_base__utility__make_pixel_format(self->private_impl.f_pixfmt),
        wuffs_base__utility__empty_slice_u8(),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    while (true) {
      v_status = wuffs_netpbm__decoder__swizzle(self, a_dst, a_src);
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      } else if (v_status.repr != wuffs_netpbm__note__internal_note_short_read) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      }
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  return status;
}

// -------- func netpbm.decoder.swizzle

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_netpbm__decoder__swizzle(
    wuffs_netpbm__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  uint32_t v_src_bytes_per_pixel = 0;
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint64_t v_i = 0;
  uint64_t v_j = 0;
  uint64_t v_n = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    status = wuffs_base__make_status(wuffs_base__error__unsupported_option);
    goto exit;
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  while (true) {
    if (self->private_impl.f_dst_x == self->private_impl.f_width) {
      self->private_impl.f_dst_x = 0u;
      self->private_impl.f_dst_y += 1u;
      if (self->private_impl.f_dst_y >= self->private_impl.f_height) {
        break;
      }
    }
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
    if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
    }
    v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_dst_bytes_per_pixel)));
    if (v_i >= ((uint64_t)(v_dst.len))) {
      v_src_bytes_per_pixel = 1u;
      if (self->private_impl.f_pixfmt == 2684356744u) {
        v_src_bytes_per_pixel = 3u;
      }
      v_n = (((uint64_t)(io2_a_src - iop_a_src)) / ((uint64_t)(v_src_bytes_per_pixel)));
      v_n = wuffs_base__u64__min(v_n, ((uint64_t)(((uint32_t)(self->private_impl.f_width - self->private_impl.f_dst_x)))));
      v_j = v_n;
      while (v_j >= 8u) {
        if (((uint64_t)(io2_a_src - iop_a_src)) >= ((uint64_t)((v_src_bytes_per_pixel * 8u)))) {
          iop_a_src += (v_src_bytes_per_pixel * 8u);
        }
        v_j -= 8u;
      }
      while (v_j > 0u) {
        if (((uint64_t)(io2_a_src - iop_a_src)) >= ((uint64_t)((v_src_bytes_per_pixel * 1u)))) {
          iop_a_src += (v_src_bytes_per_pixel * 1u);
        }
        v_j -= 1u;
      }
    } else {
      v_n = wuffs_base__pixel_swizzler__swizzle_interleaved_from_reader(
          &self->private_impl.f_swizzler,
          wuffs_base__slice_u8__subslice_i(v_dst, v_i),
          wuffs_base__pixel_buffer__palette(a_dst),
          &iop_a_src,
          io2_a_src);
    }
    if (v_n == 0u) {
      status = wuffs_base__make_status(wuffs_netpbm__note__internal_note_short_read);
      goto ok;
    }
    wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, ((uint32_t)(v_n)));
  }
  status = wuffs_base__make_status(NULL);
  goto ok;

  ok:
  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func netpbm.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_netpbm__decoder__frame_dirty_rect(
    const wuffs_netpbm__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func netpbm.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_netpbm__decoder__num_animation_loops(
    const wuffs_netpbm__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func netpbm.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_netpbm__decoder__num_decoded_frame_configs(
    const wuffs_netpbm__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func netpbm.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_netpbm__decoder__num_decoded_frames(
    const wuffs_netpbm__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func netpbm.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__restart_frame(
    wuffs_netpbm__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if ((a_index != 0u) || (a_io_position != self->private_impl.f_frame_config_io_position)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  return wuffs_base__make_status(NULL);
}

// -------- func netpbm.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_netpbm__decoder__set_report_metadata(
    wuffs_netpbm__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func netpbm.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_netpbm__decoder__tell_me_more(
    wuffs_netpbm__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func netpbm.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_netpbm__decoder__workbuf_len(
    const wuffs_netpbm__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NETPBM)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NIE)

// ---------------- Status Codes Implementations

const char wuffs_nie__error__bad_header[] = "#nie: bad header";
const char wuffs_nie__error__truncated_input[] = "#nie: truncated input";
const char wuffs_nie__error__unsupported_nie_file[] = "#nie: unsupported NIE file";
const char wuffs_nie__note__internal_note_short_read[] = "@nie: internal note: short read";

// ---------------- Private Consts

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_nie__decoder__do_decode_image_config(
    wuffs_nie__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_nie__decoder__do_decode_frame_config(
    wuffs_nie__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_nie__decoder__do_decode_frame(
    wuffs_nie__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_nie__decoder__swizzle(
    wuffs_nie__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_nie__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_nie__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_nie__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_nie__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_nie__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_nie__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_nie__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_nie__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_nie__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_nie__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_nie__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_nie__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_nie__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_nie__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_nie__decoder__initialize(
    wuffs_nie__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_nie__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_nie__decoder*
wuffs_nie__decoder__alloc(void) {
  wuffs_nie__decoder* x =
      (wuffs_nie__decoder*)(calloc(1, sizeof(wuffs_nie__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_nie__decoder__initialize(
      x, sizeof(wuffs_nie__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_nie__decoder(void) {
  return sizeof(wuffs_nie__decoder);
}

// ---------------- Function Implementations

// -------- func nie.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_nie__decoder__get_quirk(
    const wuffs_nie__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func nie.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__set_quirk(
    wuffs_nie__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func nie.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__decode_image_config(
    wuffs_nie__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_nie__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_nie__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func nie.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_nie__decoder__do_decode_image_config(
    wuffs_nie__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_a = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_a = t_0;
    }
    if (v_a != 1169146734u) {
      status = wuffs_base__make_status(wuffs_nie__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      v_a = t_1;
    }
    if (v_a == 879649535u) {
      self->private_impl.f_pixfmt = 2164295816u;
    } else if (v_a == 946758399u) {
      self->private_impl.f_pixfmt = 2164308923u;
    } else if (v_a == 879780607u) {
      status = wuffs_base__make_status(wuffs_nie__error__unsupported_nie_file);
      goto exit;
    } else if (v_a == 946889471u) {
      status = wuffs_base__make_status(wuffs_nie__error__unsupported_nie_file);
      goto exit;
    } else {
      status = wuffs_base__make_status(wuffs_nie__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      uint32_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_2 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
          if (num_bits_2 == 24) {
            t_2 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2)) << 56;
        }
      }
      v_a = t_2;
    }
    if (v_a > 2147483647u) {
      status = wuffs_base__make_status(wuffs_nie__error__bad_header);
      goto exit;
    } else if (v_a > 16777215u) {
      status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
      goto exit;
    }
    self->private_impl.f_width = v_a;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
      uint32_t t_3;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_3 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_3 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_3;
          if (num_bits_3 == 24) {
            t_3 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_3 += 8u;
          *scratch |= ((uint64_t)(num_bits_3)) << 56;
        }
      }
      v_a = t_3;
    }
    if (v_a > 2147483647u) {
      status = wuffs_base__make_status(wuffs_nie__error__bad_header);
      goto exit;
    } else if (v_a > 16777215u) {
      status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
      goto exit;
    }
    self->private_impl.f_height = v_a;
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          self->private_impl.f_pixfmt,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          16u,
          false);
    }
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func nie.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__decode_frame_config(
    wuffs_nie__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_nie__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_nie__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func nie.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_nie__decoder__do_decode_frame_config(
    wuffs_nie__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_nie__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (16u != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          16u,
          0u,
          false,
          false,
          0u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func nie.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__decode_frame(
    wuffs_nie__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_nie__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_nie__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func nie.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_nie__decoder__do_decode_frame(
    wuffs_nie__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_nie__decoder__do_decode_frame_config(self, NULL, a_src);
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    self->private_impl.f_dst_x = 0u;
    self->private_impl.f_dst_y = 0u;
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette(a_dst),
        wuffs_base__utility__make_pixel_format(self->private_impl.f_pixfmt),
        wuffs_base__utility__empty_slice_u8(),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    while (true) {
      v_status = wuffs_nie__decoder__swizzle(self, a_dst, a_src);
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      } else if (v_status.repr != wuffs_nie__note__internal_note_short_read) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      }
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  return status;
}

// -------- func nie.decoder.swizzle

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_nie__decoder__swizzle(
    wuffs_nie__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  uint32_t v_src_bytes_per_pixel = 0;
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint64_t v_i = 0;
  uint64_t v_j = 0;
  uint64_t v_n = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    status = wuffs_base__make_status(wuffs_base__error__unsupported_option);
    goto exit;
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  while (true) {
    if (self->private_impl.f_dst_x == self->private_impl.f_width) {
      self->private_impl.f_dst_x = 0u;
      self->private_impl.f_dst_y += 1u;
      if (self->private_impl.f_dst_y >= self->private_impl.f_height) {
        break;
      }
    }
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
    if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
    }
    v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_dst_bytes_per_pixel)));
    if (v_i >= ((uint64_t)(v_dst.len))) {
      v_src_bytes_per_pixel = 4u;
      if (self->private_impl.f_pixfmt == 2164308923u) {
        v_src_bytes_per_pixel = 8u;
      }
      v_n = (((uint64_t)(io2_a_src - iop_a_src)) / ((uint64_t)(v_src_bytes_per_pixel)));
      v_n = wuffs_base__u64__min(v_n, ((uint64_t)(((uint32_t)(self->private_impl.f_width - self->private_impl.f_dst_x)))));
      v_j = v_n;
      while (v_j >= 8u) {
        if (((uint64_t)(io2_a_src - iop_a_src)) >= ((uint64_t)((v_src_bytes_per_pixel * 8u)))) {
          iop_a_src += (v_src_bytes_per_pixel * 8u);
        }
        v_j -= 8u;
      }
      while (v_j > 0u) {
        if (((uint64_t)(io2_a_src - iop_a_src)) >= ((uint64_t)((v_src_bytes_per_pixel * 1u)))) {
          iop_a_src += (v_src_bytes_per_pixel * 1u);
        }
        v_j -= 1u;
      }
    } else {
      v_n = wuffs_base__pixel_swizzler__swizzle_interleaved_from_reader(
          &self->private_impl.f_swizzler,
          wuffs_base__slice_u8__subslice_i(v_dst, v_i),
          wuffs_base__pixel_buffer__palette(a_dst),
          &iop_a_src,
          io2_a_src);
    }
    if (v_n == 0u) {
      status = wuffs_base__make_status(wuffs_nie__note__internal_note_short_read);
      goto ok;
    }
    wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_dst_x, ((uint32_t)(v_n)));
  }
  status = wuffs_base__make_status(NULL);
  goto ok;

  ok:
  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func nie.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_nie__decoder__frame_dirty_rect(
    const wuffs_nie__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func nie.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_nie__decoder__num_animation_loops(
    const wuffs_nie__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func nie.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_nie__decoder__num_decoded_frame_configs(
    const wuffs_nie__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func nie.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_nie__decoder__num_decoded_frames(
    const wuffs_nie__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func nie.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__restart_frame(
    wuffs_nie__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if ((a_index != 0u) || (a_io_position != 16u)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  return wuffs_base__make_status(NULL);
}

// -------- func nie.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_nie__decoder__set_report_metadata(
    wuffs_nie__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func nie.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_nie__decoder__tell_me_more(
    wuffs_nie__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func nie.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_nie__decoder__workbuf_len(
    const wuffs_nie__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NIE)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ZLIB)

// ---------------- Status Codes Implementations

const char wuffs_zlib__note__dictionary_required[] = "@zlib: dictionary required";
const char wuffs_zlib__error__bad_checksum[] = "#zlib: bad checksum";
const char wuffs_zlib__error__bad_compression_method[] = "#zlib: bad compression method";
const char wuffs_zlib__error__bad_compression_window_size[] = "#zlib: bad compression window size";
const char wuffs_zlib__error__bad_parity_check[] = "#zlib: bad parity check";
const char wuffs_zlib__error__incorrect_dictionary[] = "#zlib: incorrect dictionary";
const char wuffs_zlib__error__truncated_input[] = "#zlib: truncated input";

// ---------------- Private Consts

#define WUFFS_ZLIB__QUIRKS_BASE 2056083456u

#define WUFFS_ZLIB__QUIRKS_COUNT 1u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_zlib__decoder__do_transform_io(
    wuffs_zlib__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

// ---------------- VTables

const wuffs_base__io_transformer__func_ptrs
wuffs_zlib__decoder__func_ptrs_for__wuffs_base__io_transformer = {
  (wuffs_base__optional_u63(*)(const void*))(&wuffs_zlib__decoder__dst_history_retain_length),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_zlib__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_zlib__decoder__set_quirk),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_zlib__decoder__transform_io),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_zlib__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_zlib__decoder__initialize(
    wuffs_zlib__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  {
    wuffs_base__status z = wuffs_adler32__hasher__initialize(
        &self->private_data.f_checksum, sizeof(self->private_data.f_checksum), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  {
    wuffs_base__status z = wuffs_adler32__hasher__initialize(
        &self->private_data.f_dict_id_hasher, sizeof(self->private_data.f_dict_id_hasher), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  {
    wuffs_base__status z = wuffs_deflate__decoder__initialize(
        &self->private_data.f_flate, sizeof(self->private_data.f_flate), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__io_transformer.vtable_name =
      wuffs_base__io_transformer__vtable_name;
  self->private_impl.vtable_for__wuffs_base__io_transformer.function_pointers =
      (const void*)(&wuffs_zlib__decoder__func_ptrs_for__wuffs_base__io_transformer);
  return wuffs_base__make_status(NULL);
}

wuffs_zlib__decoder*
wuffs_zlib__decoder__alloc(void) {
  wuffs_zlib__decoder* x =
      (wuffs_zlib__decoder*)(calloc(1, sizeof(wuffs_zlib__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_zlib__decoder__initialize(
      x, sizeof(wuffs_zlib__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_zlib__decoder(void) {
  return sizeof(wuffs_zlib__decoder);
}

// ---------------- Function Implementations

// -------- func zlib.decoder.dictionary_id

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_zlib__decoder__dictionary_id(
    const wuffs_zlib__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return self->private_impl.f_dict_id_want;
}

// -------- func zlib.decoder.add_dictionary

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_zlib__decoder__add_dictionary(
    wuffs_zlib__decoder* self,
    wuffs_base__slice_u8 a_dict) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  if (self->private_impl.f_header_complete) {
    self->private_impl.f_bad_call_sequence = true;
  } else {
    self->private_impl.f_dict_id_have = wuffs_adler32__hasher__update_u32(&self->private_data.f_dict_id_hasher, a_dict);
    wuffs_deflate__decoder__add_history(&self->private_data.f_flate, a_dict);
  }
  self->private_impl.f_got_dictionary = true;
  return wuffs_base__make_empty_struct();
}

// -------- func zlib.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_zlib__decoder__get_quirk(
    const wuffs_zlib__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  uint32_t v_key = 0;

  if ((a_key == 1u) && self->private_impl.f_ignore_checksum) {
    return 1u;
  } else if (a_key >= 2056083456u) {
    v_key = (a_key - 2056083456u);
    if (v_key < 1u) {
      if (self->private_impl.f_quirks[v_key]) {
        return 1u;
      }
    }
  }
  return 0u;
}

// -------- func zlib.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_zlib__decoder__set_quirk(
    wuffs_zlib__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_header_complete) {
    self->private_impl.f_bad_call_sequence = true;
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  } else if (a_key == 1u) {
    self->private_impl.f_ignore_checksum = (a_value > 0u);
    return wuffs_base__make_status(NULL);
  } else if (a_key >= 2056083456u) {
    a_key -= 2056083456u;
    if (a_key < 1u) {
      self->private_impl.f_quirks[a_key] = (a_value > 0u);
      return wuffs_base__make_status(NULL);
    }
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func zlib.decoder.dst_history_retain_length

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_zlib__decoder__dst_history_retain_length(
    const wuffs_zlib__decoder* self) {
  if (!self) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }

  return wuffs_base__utility__make_optional_u63(true, 0u);
}

// -------- func zlib.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_zlib__decoder__workbuf_len(
    const wuffs_zlib__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(1u, 1u);
}

// -------- func zlib.decoder.transform_io

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_zlib__decoder__transform_io(
    wuffs_zlib__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_zlib__decoder__do_transform_io(self, a_dst, a_src, a_workbuf);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_zlib__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func zlib.decoder.do_transform_io

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_zlib__decoder__do_transform_io(
    wuffs_zlib__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint16_t v_x = 0;
  uint32_t v_checksum_have = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint32_t v_checksum_want = 0;
  uint64_t v_mark = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_transform_io;
  if (coro_susp_point) {
    v_checksum_have = self->private_data.s_do_transform_io.v_checksum_have;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_bad_call_sequence) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    } else if (self->private_impl.f_quirks[0u]) {
    } else if ( ! self->private_impl.f_want_dictionary) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        uint16_t t_0;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_0 = wuffs_base__peek_u16be__no_bounds_check(iop_a_src);
          iop_a_src += 2;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
            *scratch >>= 8;
            *scratch <<= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
            if (num_bits_0 == 8) {
              t_0 = ((uint16_t)(*scratch >> 48));
              break;
            }
            num_bits_0 += 8u;
            *scratch |= ((uint64_t)(num_bits_0));
          }
        }
        v_x = t_0;
      }
      if (((uint16_t)(((uint16_t)(v_x >> 8u)) & 15u)) != 8u) {
        status = wuffs_base__make_status(wuffs_zlib__error__bad_compression_method);
        goto exit;
      }
      if (((uint16_t)(v_x >> 12u)) > 7u) {
        status = wuffs_base__make_status(wuffs_zlib__error__bad_compression_window_size);
        goto exit;
      }
      if (((uint16_t)(v_x % 31u)) != 0u) {
        status = wuffs_base__make_status(wuffs_zlib__error__bad_parity_check);
        goto exit;
      }
      self->private_impl.f_want_dictionary = (((uint16_t)(v_x & 32u)) != 0u);
      if (self->private_impl.f_want_dictionary) {
        self->private_impl.f_dict_id_have = 1u;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          uint32_t t_1;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_1 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_do_transform_io.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
              uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
              if (num_bits_1 == 24) {
                t_1 = ((uint32_t)(*scratch >> 32));
                break;
              }
              num_bits_1 += 8u;
              *scratch |= ((uint64_t)(num_bits_1));
            }
          }
          self->private_impl.f_dict_id_want = t_1;
        }
        status = wuffs_base__make_status(wuffs_zlib__note__dictionary_required);
        goto ok;
      } else if (self->private_impl.f_got_dictionary) {
        status = wuffs_base__make_status(wuffs_zlib__error__incorrect_dictionary);
        goto exit;
      }
    } else if (self->private_impl.f_dict_id_have != self->private_impl.f_dict_id_want) {
      if (self->private_impl.f_got_dictionary) {
        status = wuffs_base__make_status(wuffs_zlib__error__incorrect_dictionary);
        goto exit;
      }
      status = wuffs_base__make_status(wuffs_zlib__note__dictionary_required);
      goto ok;
    }
    self->private_impl.f_header_complete = true;
    while (true) {
      v_mark = ((uint64_t)(iop_a_dst - io0_a_dst));
      {
        if (a_dst) {
          a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
        }
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        wuffs_base__status t_2 = wuffs_deflate__decoder__transform_io(&self->private_data.f_flate, a_dst, a_src, a_workbuf);
        v_status = t_2;
        if (a_dst) {
          iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
        }
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
      }
      if ( ! self->private_impl.f_ignore_checksum &&  ! self->private_impl.f_quirks[0u]) {
        v_checksum_have = wuffs_adler32__hasher__update_u32(&self->private_data.f_checksum, wuffs_private_impl__io__since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst));
      }
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
    }
    if ( ! self->private_impl.f_quirks[0u]) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        uint32_t t_3;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_3 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_3 = ((uint32_t)(*scratch & 0xFFu));
            *scratch >>= 8;
            *scratch <<= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_3);
            if (num_bits_3 == 24) {
              t_3 = ((uint32_t)(*scratch >> 32));
              break;
            }
            num_bits_3 += 8u;
            *scratch |= ((uint64_t)(num_bits_3));
          }
        }
        v_checksum_want = t_3;
      }
      if ( ! self->private_impl.f_ignore_checksum && (v_checksum_have != v_checksum_want)) {
        status = wuffs_base__make_status(wuffs_zlib__error__bad_checksum);
        goto exit;
      }
    }

    ok:
    self->private_impl.p_do_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_transform_io.v_checksum_have = v_checksum_have;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ZLIB)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__PNG)

// ---------------- Status Codes Implementations

const char wuffs_png__error__bad_animation_sequence_number[] = "#png: bad animation sequence number";
const char wuffs_png__error__bad_checksum[] = "#png: bad checksum";
const char wuffs_png__error__bad_chunk[] = "#png: bad chunk";
const char wuffs_png__error__bad_filter[] = "#png: bad filter";
const char wuffs_png__error__bad_header[] = "#png: bad header";
const char wuffs_png__error__bad_text_chunk_not_latin_1[] = "#png: bad text chunk (not Latin-1)";
const char wuffs_png__error__missing_palette[] = "#png: missing palette";
const char wuffs_png__error__truncated_input[] = "#png: truncated input";
const char wuffs_png__error__unsupported_cgbi_extension[] = "#png: unsupported CgBI extension";
const char wuffs_png__error__unsupported_png_compression_method[] = "#png: unsupported PNG compression method";
const char wuffs_png__error__unsupported_png_file[] = "#png: unsupported PNG file";
const char wuffs_png__error__internal_error_inconsistent_i_o[] = "#png: internal error: inconsistent I/O";
const char wuffs_png__error__internal_error_inconsistent_chunk_type[] = "#png: internal error: inconsistent chunk type";
const char wuffs_png__error__internal_error_inconsistent_workbuf_length[] = "#png: internal error: inconsistent workbuf length";
const char wuffs_png__error__internal_error_zlib_decoder_did_not_exhaust_its_input[] = "#png: internal error: zlib decoder did not exhaust its input";

// ---------------- Private Consts

#define WUFFS_PNG__ANCILLARY_BIT 32u

static const uint8_t
WUFFS_PNG__INTERLACING[8][6] WUFFS_BASE__POTENTIALLY_UNUSED = {
  {
    0u, 0u, 0u, 0u, 0u, 0u,
  }, {
    3u, 7u, 0u, 3u, 7u, 0u,
  }, {
    3u, 3u, 4u, 3u, 7u, 0u,
  }, {
    2u, 3u, 0u, 3u, 3u, 4u,
  }, {
    2u, 1u, 2u, 2u, 3u, 0u,
  }, {
    1u, 1u, 0u, 2u, 1u, 2u,
  }, {
    1u, 0u, 1u, 1u, 1u, 0u,
  }, {
    0u, 0u, 0u, 1u, 0u, 1u,
  },
};

static const uint8_t
WUFFS_PNG__LOW_BIT_DEPTH_MULTIPLIERS[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 255u, 85u, 0u, 17u, 0u, 0u, 0u,
};

static const uint8_t
WUFFS_PNG__LOW_BIT_DEPTH_NUM_PACKS[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 8u, 4u, 0u, 2u, 0u, 0u, 0u,
};

static const uint8_t
WUFFS_PNG__NUM_CHANNELS[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1u, 0u, 3u, 1u, 2u, 0u, 4u, 0u,
};

static const uint16_t
WUFFS_PNG__LATIN_1[256] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  32u, 33u, 34u, 35u, 36u, 37u, 38u, 39u,
  40u, 41u, 42u, 43u, 44u, 45u, 46u, 47u,
  48u, 49u, 50u, 51u, 52u, 53u, 54u, 55u,
  56u, 57u, 58u, 59u, 60u, 61u, 62u, 63u,
  64u, 65u, 66u, 67u, 68u, 69u, 70u, 71u,
  72u, 73u, 74u, 75u, 76u, 77u, 78u, 79u,
  80u, 81u, 82u, 83u, 84u, 85u, 86u, 87u,
  88u, 89u, 90u, 91u, 92u, 93u, 94u, 95u,
  96u, 97u, 98u, 99u, 100u, 101u, 102u, 103u,
  104u, 105u, 106u, 107u, 108u, 109u, 110u, 111u,
  112u, 113u, 114u, 115u, 116u, 117u, 118u, 119u,
  120u, 121u, 122u, 123u, 124u, 125u, 126u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 41410u, 41666u, 41922u, 42178u, 42434u, 42690u, 42946u,
  43202u, 43458u, 43714u, 43970u, 44226u, 44482u, 44738u, 44994u,
  45250u, 45506u, 45762u, 46018u, 46274u, 46530u, 46786u, 47042u,
  47298u, 47554u, 47810u, 48066u, 48322u, 48578u, 48834u, 49090u,
  32963u, 33219u, 33475u, 33731u, 33987u, 34243u, 34499u, 34755u,
  35011u, 35267u, 35523u, 35779u, 36035u, 36291u, 36547u, 36803u,
  37059u, 37315u, 37571u, 37827u, 38083u, 38339u, 38595u, 38851u,
  39107u, 39363u, 39619u, 39875u, 40131u, 40387u, 40643u, 40899u,
  41155u, 41411u, 41667u, 41923u, 42179u, 42435u, 42691u, 42947u,
  43203u, 43459u, 43715u, 43971u, 44227u, 44483u, 44739u, 44995u,
  45251u, 45507u, 45763u, 46019u, 46275u, 46531u, 46787u, 47043u,
  47299u, 47555u, 47811u, 48067u, 48323u, 48579u, 48835u, 49091u,
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1_distance_4_arm_neon(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3_distance_4_arm_neon(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_3_arm_neon(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_4_arm_neon(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1__choosy_default(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1_distance_3_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1_distance_4_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_2(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3__choosy_default(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3_distance_3_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3_distance_4_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4__choosy_default(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_3_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_4_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1_distance_4_x86_sse42(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3_distance_4_x86_sse42(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_3_x86_sse42(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_4_x86_sse42(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev);
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__do_decode_image_config(
    wuffs_png__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_ihdr(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__assign_filter_distance(
    wuffs_png__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static uint64_t
wuffs_png__decoder__calculate_bytes_per_row(
    const wuffs_png__decoder* self,
    uint32_t a_width);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__choose_filter_implementations(
    wuffs_png__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_other_chunk(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src,
    bool a_framy);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_actl(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_chrm(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_exif(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_fctl(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_gama(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_iccp(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_plte(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_srgb(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_trns(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__do_decode_frame_config(
    wuffs_png__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__skip_frame(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__do_decode_frame(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_pass(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__do_tell_me_more(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__filter_and_swizzle(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__filter_and_swizzle__choosy_default(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__filter_and_swizzle_tricky(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_png__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_png__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_png__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_png__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_png__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_png__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_png__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_png__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_png__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_png__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_png__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_png__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_png__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_png__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_png__decoder__initialize(
    wuffs_png__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.choosy_filter_1 = &wuffs_png__decoder__filter_1__choosy_default;
  self->private_impl.choosy_filter_3 = &wuffs_png__decoder__filter_3__choosy_default;
  self->private_impl.choosy_filter_4 = &wuffs_png__decoder__filter_4__choosy_default;
  self->private_impl.choosy_filter_and_swizzle = &wuffs_png__decoder__filter_and_swizzle__choosy_default;

  {
    wuffs_base__status z = wuffs_crc32__ieee_hasher__initialize(
        &self->private_data.f_crc32, sizeof(self->private_data.f_crc32), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  {
    wuffs_base__status z = wuffs_zlib__decoder__initialize(
        &self->private_data.f_zlib, sizeof(self->private_data.f_zlib), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_png__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_png__decoder*
wuffs_png__decoder__alloc(void) {
  wuffs_png__decoder* x =
      (wuffs_png__decoder*)(calloc(1, sizeof(wuffs_png__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_png__decoder__initialize(
      x, sizeof(wuffs_png__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_png__decoder(void) {
  return sizeof(wuffs_png__decoder);
}

// ---------------- Function Implementations

// ‼ WUFFS MULTI-FILE SECTION +arm_neon
// -------- func png.decoder.filter_1_distance_4_arm_neon

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1_distance_4_arm_neon(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr) {
  wuffs_base__slice_u8 v_curr = {0};
  uint8x8_t v_fa = {0};
  uint8x8_t v_fx = {0};

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    v_curr.len = 4;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 8) * 8));
    while (v_curr.ptr < i_end0_curr) {
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_fx = vadd_u8(v_fx, v_fa);
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_fa = v_fx;
      v_curr.ptr += 4;
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_fx = vadd_u8(v_fx, v_fa);
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_fa = v_fx;
      v_curr.ptr += 4;
    }
    v_curr.len = 4;
    const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
    while (v_curr.ptr < i_end1_curr) {
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_fx = vadd_u8(v_fx, v_fa);
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_fa = v_fx;
      v_curr.ptr += 4;
    }
    v_curr.len = 0;
  }
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
// ‼ WUFFS MULTI-FILE SECTION -arm_neon

// ‼ WUFFS MULTI-FILE SECTION +arm_neon
// -------- func png.decoder.filter_3_distance_4_arm_neon

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3_distance_4_arm_neon(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  uint8x8_t v_fa = {0};
  uint8x8_t v_fb = {0};
  uint8x8_t v_fx = {0};

  if (((uint64_t)(a_prev.len)) == 0u) {
    {
      wuffs_base__slice_u8 i_slice_curr = a_curr;
      v_curr.ptr = i_slice_curr.ptr;
      v_curr.len = 4;
      const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 8) * 8));
      while (v_curr.ptr < i_end0_curr) {
        v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_fx = vadd_u8(v_fx, vhadd_u8(v_fa, v_fb));
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
        v_fa = v_fx;
        v_curr.ptr += 4;
        v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_fx = vadd_u8(v_fx, vhadd_u8(v_fa, v_fb));
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
        v_fa = v_fx;
        v_curr.ptr += 4;
      }
      v_curr.len = 4;
      const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
      while (v_curr.ptr < i_end1_curr) {
        v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_fx = vadd_u8(v_fx, vhadd_u8(v_fa, v_fb));
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
        v_fa = v_fx;
        v_curr.ptr += 4;
      }
      v_curr.len = 0;
    }
  } else {
    {
      wuffs_base__slice_u8 i_slice_curr = a_curr;
      v_curr.ptr = i_slice_curr.ptr;
      wuffs_base__slice_u8 i_slice_prev = a_prev;
      v_prev.ptr = i_slice_prev.ptr;
      i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
      v_curr.len = 4;
      v_prev.len = 4;
      const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 8) * 8));
      while (v_curr.ptr < i_end0_curr) {
        v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
        v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_fx = vadd_u8(v_fx, vhadd_u8(v_fa, v_fb));
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
        v_fa = v_fx;
        v_curr.ptr += 4;
        v_prev.ptr += 4;
        v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
        v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_fx = vadd_u8(v_fx, vhadd_u8(v_fa, v_fb));
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
        v_fa = v_fx;
        v_curr.ptr += 4;
        v_prev.ptr += 4;
      }
      v_curr.len = 4;
      v_prev.len = 4;
      const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
      while (v_curr.ptr < i_end1_curr) {
        v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
        v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_fx = vadd_u8(v_fx, vhadd_u8(v_fa, v_fb));
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
        v_fa = v_fx;
        v_curr.ptr += 4;
        v_prev.ptr += 4;
      }
      v_curr.len = 0;
      v_prev.len = 0;
    }
  }
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
// ‼ WUFFS MULTI-FILE SECTION -arm_neon

// ‼ WUFFS MULTI-FILE SECTION +arm_neon
// -------- func png.decoder.filter_4_distance_3_arm_neon

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_3_arm_neon(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  uint8x8_t v_fa = {0};
  uint8x8_t v_fb = {0};
  uint8x8_t v_fc = {0};
  uint8x8_t v_fx = {0};
  uint16x8_t v_fafb = {0};
  uint16x8_t v_fcfc = {0};
  uint16x8_t v_pa = {0};
  uint16x8_t v_pb = {0};
  uint16x8_t v_pc = {0};
  uint16x8_t v_cmpab = {0};
  uint16x8_t v_cmpac = {0};
  uint8x8_t v_picka = {0};
  uint8x8_t v_pickb = {0};

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    wuffs_base__slice_u8 i_slice_prev = a_prev;
    v_prev.ptr = i_slice_prev.ptr;
    i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
    v_curr.len = 4;
    v_prev.len = 4;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, wuffs_private_impl__iterate_total_advance((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)), 7, 6));
    while (v_curr.ptr < i_end0_curr) {
      v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_fafb = vaddl_u8(v_fa, v_fb);
      v_fcfc = vaddl_u8(v_fc, v_fc);
      v_pa = vabdl_u8(v_fb, v_fc);
      v_pb = vabdl_u8(v_fa, v_fc);
      v_pc = vabdq_u16(v_fafb, v_fcfc);
      v_cmpab = vcleq_u16(v_pa, v_pb);
      v_cmpac = vcleq_u16(v_pa, v_pc);
      v_picka = vmovn_u16(vandq_u16(v_cmpab, v_cmpac));
      v_pickb = vmovn_u16(vcleq_u16(v_pb, v_pc));
      v_fx = vadd_u8(v_fx, vbsl_u8(v_picka, v_fa, vbsl_u8(v_pickb, v_fb, v_fc)));
      wuffs_base__poke_u24le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_fc = v_fb;
      v_fa = v_fx;
      v_curr.ptr += 3;
      v_prev.ptr += 3;
      v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_fafb = vaddl_u8(v_fa, v_fb);
      v_fcfc = vaddl_u8(v_fc, v_fc);
      v_pa = vabdl_u8(v_fb, v_fc);
      v_pb = vabdl_u8(v_fa, v_fc);
      v_pc = vabdq_u16(v_fafb, v_fcfc);
      v_cmpab = vcleq_u16(v_pa, v_pb);
      v_cmpac = vcleq_u16(v_pa, v_pc);
      v_picka = vmovn_u16(vandq_u16(v_cmpab, v_cmpac));
      v_pickb = vmovn_u16(vcleq_u16(v_pb, v_pc));
      v_fx = vadd_u8(v_fx, vbsl_u8(v_picka, v_fa, vbsl_u8(v_pickb, v_fb, v_fc)));
      wuffs_base__poke_u24le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_fc = v_fb;
      v_fa = v_fx;
      v_curr.ptr += 3;
      v_prev.ptr += 3;
    }
    v_curr.len = 4;
    v_prev.len = 4;
    const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, wuffs_private_impl__iterate_total_advance((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)), 4, 3));
    while (v_curr.ptr < i_end1_curr) {
      v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_fafb = vaddl_u8(v_fa, v_fb);
      v_fcfc = vaddl_u8(v_fc, v_fc);
      v_pa = vabdl_u8(v_fb, v_fc);
      v_pb = vabdl_u8(v_fa, v_fc);
      v_pc = vabdq_u16(v_fafb, v_fcfc);
      v_cmpab = vcleq_u16(v_pa, v_pb);
      v_cmpac = vcleq_u16(v_pa, v_pc);
      v_picka = vmovn_u16(vandq_u16(v_cmpab, v_cmpac));
      v_pickb = vmovn_u16(vcleq_u16(v_pb, v_pc));
      v_fx = vadd_u8(v_fx, vbsl_u8(v_picka, v_fa, vbsl_u8(v_pickb, v_fb, v_fc)));
      wuffs_base__poke_u24le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_fc = v_fb;
      v_fa = v_fx;
      v_curr.ptr += 3;
      v_prev.ptr += 3;
    }
    v_curr.len = 3;
    v_prev.len = 3;
    const uint8_t* i_end2_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 3) * 3));
    while (v_curr.ptr < i_end2_curr) {
      v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u24le__no_bounds_check(v_prev.ptr)));
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u24le__no_bounds_check(v_curr.ptr)));
      v_fafb = vaddl_u8(v_fa, v_fb);
      v_fcfc = vaddl_u8(v_fc, v_fc);
      v_pa = vabdl_u8(v_fb, v_fc);
      v_pb = vabdl_u8(v_fa, v_fc);
      v_pc = vabdq_u16(v_fafb, v_fcfc);
      v_cmpab = vcleq_u16(v_pa, v_pb);
      v_cmpac = vcleq_u16(v_pa, v_pc);
      v_picka = vmovn_u16(vandq_u16(v_cmpab, v_cmpac));
      v_pickb = vmovn_u16(vcleq_u16(v_pb, v_pc));
      v_fx = vadd_u8(v_fx, vbsl_u8(v_picka, v_fa, vbsl_u8(v_pickb, v_fb, v_fc)));
      wuffs_base__poke_u24le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_curr.ptr += 3;
      v_prev.ptr += 3;
    }
    v_curr.len = 0;
    v_prev.len = 0;
  }
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
// ‼ WUFFS MULTI-FILE SECTION -arm_neon

// ‼ WUFFS MULTI-FILE SECTION +arm_neon
// -------- func png.decoder.filter_4_distance_4_arm_neon

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_4_arm_neon(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  uint8x8_t v_fa = {0};
  uint8x8_t v_fb = {0};
  uint8x8_t v_fc = {0};
  uint8x8_t v_fx = {0};
  uint16x8_t v_fafb = {0};
  uint16x8_t v_fcfc = {0};
  uint16x8_t v_pa = {0};
  uint16x8_t v_pb = {0};
  uint16x8_t v_pc = {0};
  uint16x8_t v_cmpab = {0};
  uint16x8_t v_cmpac = {0};
  uint8x8_t v_picka = {0};
  uint8x8_t v_pickb = {0};

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    wuffs_base__slice_u8 i_slice_prev = a_prev;
    v_prev.ptr = i_slice_prev.ptr;
    i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
    v_curr.len = 4;
    v_prev.len = 4;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 8) * 8));
    while (v_curr.ptr < i_end0_curr) {
      v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_fafb = vaddl_u8(v_fa, v_fb);
      v_fcfc = vaddl_u8(v_fc, v_fc);
      v_pa = vabdl_u8(v_fb, v_fc);
      v_pb = vabdl_u8(v_fa, v_fc);
      v_pc = vabdq_u16(v_fafb, v_fcfc);
      v_cmpab = vcleq_u16(v_pa, v_pb);
      v_cmpac = vcleq_u16(v_pa, v_pc);
      v_picka = vmovn_u16(vandq_u16(v_cmpab, v_cmpac));
      v_pickb = vmovn_u16(vcleq_u16(v_pb, v_pc));
      v_fx = vadd_u8(v_fx, vbsl_u8(v_picka, v_fa, vbsl_u8(v_pickb, v_fb, v_fc)));
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_fc = v_fb;
      v_fa = v_fx;
      v_curr.ptr += 4;
      v_prev.ptr += 4;
      v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_fafb = vaddl_u8(v_fa, v_fb);
      v_fcfc = vaddl_u8(v_fc, v_fc);
      v_pa = vabdl_u8(v_fb, v_fc);
      v_pb = vabdl_u8(v_fa, v_fc);
      v_pc = vabdq_u16(v_fafb, v_fcfc);
      v_cmpab = vcleq_u16(v_pa, v_pb);
      v_cmpac = vcleq_u16(v_pa, v_pc);
      v_picka = vmovn_u16(vandq_u16(v_cmpab, v_cmpac));
      v_pickb = vmovn_u16(vcleq_u16(v_pb, v_pc));
      v_fx = vadd_u8(v_fx, vbsl_u8(v_picka, v_fa, vbsl_u8(v_pickb, v_fb, v_fc)));
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_fc = v_fb;
      v_fa = v_fx;
      v_curr.ptr += 4;
      v_prev.ptr += 4;
    }
    v_curr.len = 4;
    v_prev.len = 4;
    const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
    while (v_curr.ptr < i_end1_curr) {
      v_fb = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_fx = vreinterpret_u8_u32(vdup_n_u32(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_fafb = vaddl_u8(v_fa, v_fb);
      v_fcfc = vaddl_u8(v_fc, v_fc);
      v_pa = vabdl_u8(v_fb, v_fc);
      v_pb = vabdl_u8(v_fa, v_fc);
      v_pc = vabdq_u16(v_fafb, v_fcfc);
      v_cmpab = vcleq_u16(v_pa, v_pb);
      v_cmpac = vcleq_u16(v_pa, v_pc);
      v_picka = vmovn_u16(vandq_u16(v_cmpab, v_cmpac));
      v_pickb = vmovn_u16(vcleq_u16(v_pb, v_pc));
      v_fx = vadd_u8(v_fx, vbsl_u8(v_picka, v_fa, vbsl_u8(v_pickb, v_fb, v_fc)));
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, vget_lane_u32(vreinterpret_u32_u8(v_fx), 0u));
      v_fc = v_fb;
      v_fa = v_fx;
      v_curr.ptr += 4;
      v_prev.ptr += 4;
    }
    v_curr.len = 0;
    v_prev.len = 0;
  }
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
// ‼ WUFFS MULTI-FILE SECTION -arm_neon

// -------- func png.decoder.filter_1

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr) {
  return (*self->private_impl.choosy_filter_1)(self, a_curr);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1__choosy_default(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr) {
  uint64_t v_filter_distance = 0;
  uint8_t v_fa = 0;
  uint64_t v_i_start = 0;
  uint64_t v_i = 0;

  v_filter_distance = ((uint64_t)(self->private_impl.f_filter_distance));
  v_i_start = 0u;
  while (v_i_start < v_filter_distance) {
    v_fa = 0u;
    v_i = v_i_start;
    while (v_i < ((uint64_t)(a_curr.len))) {
      a_curr.ptr[v_i] = ((uint8_t)(a_curr.ptr[v_i] + v_fa));
      v_fa = a_curr.ptr[v_i];
      v_i += v_filter_distance;
    }
    v_i_start += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.filter_1_distance_3_fallback

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1_distance_3_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr) {
  wuffs_base__slice_u8 v_curr = {0};
  uint8_t v_fa0 = 0;
  uint8_t v_fa1 = 0;
  uint8_t v_fa2 = 0;

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    v_curr.len = 3;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 6) * 6));
    while (v_curr.ptr < i_end0_curr) {
      v_fa0 = ((uint8_t)(v_fa0 + v_curr.ptr[0u]));
      v_curr.ptr[0u] = v_fa0;
      v_fa1 = ((uint8_t)(v_fa1 + v_curr.ptr[1u]));
      v_curr.ptr[1u] = v_fa1;
      v_fa2 = ((uint8_t)(v_fa2 + v_curr.ptr[2u]));
      v_curr.ptr[2u] = v_fa2;
      v_curr.ptr += 3;
      v_fa0 = ((uint8_t)(v_fa0 + v_curr.ptr[0u]));
      v_curr.ptr[0u] = v_fa0;
      v_fa1 = ((uint8_t)(v_fa1 + v_curr.ptr[1u]));
      v_curr.ptr[1u] = v_fa1;
      v_fa2 = ((uint8_t)(v_fa2 + v_curr.ptr[2u]));
      v_curr.ptr[2u] = v_fa2;
      v_curr.ptr += 3;
    }
    v_curr.len = 3;
    const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 3) * 3));
    while (v_curr.ptr < i_end1_curr) {
      v_fa0 = ((uint8_t)(v_fa0 + v_curr.ptr[0u]));
      v_curr.ptr[0u] = v_fa0;
      v_fa1 = ((uint8_t)(v_fa1 + v_curr.ptr[1u]));
      v_curr.ptr[1u] = v_fa1;
      v_fa2 = ((uint8_t)(v_fa2 + v_curr.ptr[2u]));
      v_curr.ptr[2u] = v_fa2;
      v_curr.ptr += 3;
    }
    v_curr.len = 0;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.filter_1_distance_4_fallback

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1_distance_4_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr) {
  wuffs_base__slice_u8 v_curr = {0};
  uint8_t v_fa0 = 0;
  uint8_t v_fa1 = 0;
  uint8_t v_fa2 = 0;
  uint8_t v_fa3 = 0;

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    v_curr.len = 4;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
    while (v_curr.ptr < i_end0_curr) {
      v_fa0 = ((uint8_t)(v_fa0 + v_curr.ptr[0u]));
      v_curr.ptr[0u] = v_fa0;
      v_fa1 = ((uint8_t)(v_fa1 + v_curr.ptr[1u]));
      v_curr.ptr[1u] = v_fa1;
      v_fa2 = ((uint8_t)(v_fa2 + v_curr.ptr[2u]));
      v_curr.ptr[2u] = v_fa2;
      v_fa3 = ((uint8_t)(v_fa3 + v_curr.ptr[3u]));
      v_curr.ptr[3u] = v_fa3;
      v_curr.ptr += 4;
    }
    v_curr.len = 0;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.filter_2

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_2(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  uint64_t v_n = 0;
  uint64_t v_i = 0;

  v_n = wuffs_base__u64__min(((uint64_t)(a_curr.len)), ((uint64_t)(a_prev.len)));
  v_i = 0u;
  while (v_i < v_n) {
    a_curr.ptr[v_i] = ((uint8_t)(a_curr.ptr[v_i] + a_prev.ptr[v_i]));
    v_i += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.filter_3

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  return (*self->private_impl.choosy_filter_3)(self, a_curr, a_prev);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3__choosy_default(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  uint64_t v_filter_distance = 0;
  uint64_t v_n = 0;
  uint64_t v_i = 0;

  v_filter_distance = ((uint64_t)(self->private_impl.f_filter_distance));
  if (((uint64_t)(a_prev.len)) == 0u) {
    v_i = v_filter_distance;
    while (v_i < ((uint64_t)(a_curr.len))) {
      a_curr.ptr[v_i] = ((uint8_t)(a_curr.ptr[v_i] + ((uint8_t)(a_curr.ptr[(v_i - v_filter_distance)] / 2u))));
      v_i += 1u;
    }
  } else {
    v_n = wuffs_base__u64__min(((uint64_t)(a_curr.len)), ((uint64_t)(a_prev.len)));
    v_i = 0u;
    while ((v_i < v_n) && (v_i < v_filter_distance)) {
      a_curr.ptr[v_i] = ((uint8_t)(a_curr.ptr[v_i] + ((uint8_t)(a_prev.ptr[v_i] / 2u))));
      v_i += 1u;
    }
    v_i = v_filter_distance;
    while (v_i < v_n) {
      a_curr.ptr[v_i] = ((uint8_t)(a_curr.ptr[v_i] + ((uint8_t)(((((uint32_t)(a_curr.ptr[(v_i - v_filter_distance)])) + ((uint32_t)(a_prev.ptr[v_i]))) / 2u)))));
      v_i += 1u;
    }
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.filter_3_distance_3_fallback

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3_distance_3_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  uint8_t v_fa0 = 0;
  uint8_t v_fa1 = 0;
  uint8_t v_fa2 = 0;

  if (((uint64_t)(a_prev.len)) == 0u) {
    {
      wuffs_base__slice_u8 i_slice_curr = a_curr;
      v_curr.ptr = i_slice_curr.ptr;
      v_curr.len = 3;
      const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 6) * 6));
      while (v_curr.ptr < i_end0_curr) {
        v_fa0 = ((uint8_t)(((uint8_t)(v_fa0 / 2u)) + v_curr.ptr[0u]));
        v_curr.ptr[0u] = v_fa0;
        v_fa1 = ((uint8_t)(((uint8_t)(v_fa1 / 2u)) + v_curr.ptr[1u]));
        v_curr.ptr[1u] = v_fa1;
        v_fa2 = ((uint8_t)(((uint8_t)(v_fa2 / 2u)) + v_curr.ptr[2u]));
        v_curr.ptr[2u] = v_fa2;
        v_curr.ptr += 3;
        v_fa0 = ((uint8_t)(((uint8_t)(v_fa0 / 2u)) + v_curr.ptr[0u]));
        v_curr.ptr[0u] = v_fa0;
        v_fa1 = ((uint8_t)(((uint8_t)(v_fa1 / 2u)) + v_curr.ptr[1u]));
        v_curr.ptr[1u] = v_fa1;
        v_fa2 = ((uint8_t)(((uint8_t)(v_fa2 / 2u)) + v_curr.ptr[2u]));
        v_curr.ptr[2u] = v_fa2;
        v_curr.ptr += 3;
      }
      v_curr.len = 3;
      const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 3) * 3));
      while (v_curr.ptr < i_end1_curr) {
        v_fa0 = ((uint8_t)(((uint8_t)(v_fa0 / 2u)) + v_curr.ptr[0u]));
        v_curr.ptr[0u] = v_fa0;
        v_fa1 = ((uint8_t)(((uint8_t)(v_fa1 / 2u)) + v_curr.ptr[1u]));
        v_curr.ptr[1u] = v_fa1;
        v_fa2 = ((uint8_t)(((uint8_t)(v_fa2 / 2u)) + v_curr.ptr[2u]));
        v_curr.ptr[2u] = v_fa2;
        v_curr.ptr += 3;
      }
      v_curr.len = 0;
    }
  } else {
    {
      wuffs_base__slice_u8 i_slice_curr = a_curr;
      v_curr.ptr = i_slice_curr.ptr;
      wuffs_base__slice_u8 i_slice_prev = a_prev;
      v_prev.ptr = i_slice_prev.ptr;
      i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
      v_curr.len = 3;
      v_prev.len = 3;
      const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 6) * 6));
      while (v_curr.ptr < i_end0_curr) {
        v_fa0 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa0)) + ((uint32_t)(v_prev.ptr[0u]))) / 2u))) + v_curr.ptr[0u]));
        v_curr.ptr[0u] = v_fa0;
        v_fa1 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa1)) + ((uint32_t)(v_prev.ptr[1u]))) / 2u))) + v_curr.ptr[1u]));
        v_curr.ptr[1u] = v_fa1;
        v_fa2 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa2)) + ((uint32_t)(v_prev.ptr[2u]))) / 2u))) + v_curr.ptr[2u]));
        v_curr.ptr[2u] = v_fa2;
        v_curr.ptr += 3;
        v_prev.ptr += 3;
        v_fa0 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa0)) + ((uint32_t)(v_prev.ptr[0u]))) / 2u))) + v_curr.ptr[0u]));
        v_curr.ptr[0u] = v_fa0;
        v_fa1 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa1)) + ((uint32_t)(v_prev.ptr[1u]))) / 2u))) + v_curr.ptr[1u]));
        v_curr.ptr[1u] = v_fa1;
        v_fa2 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa2)) + ((uint32_t)(v_prev.ptr[2u]))) / 2u))) + v_curr.ptr[2u]));
        v_curr.ptr[2u] = v_fa2;
        v_curr.ptr += 3;
        v_prev.ptr += 3;
      }
      v_curr.len = 3;
      v_prev.len = 3;
      const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 3) * 3));
      while (v_curr.ptr < i_end1_curr) {
        v_fa0 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa0)) + ((uint32_t)(v_prev.ptr[0u]))) / 2u))) + v_curr.ptr[0u]));
        v_curr.ptr[0u] = v_fa0;
        v_fa1 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa1)) + ((uint32_t)(v_prev.ptr[1u]))) / 2u))) + v_curr.ptr[1u]));
        v_curr.ptr[1u] = v_fa1;
        v_fa2 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa2)) + ((uint32_t)(v_prev.ptr[2u]))) / 2u))) + v_curr.ptr[2u]));
        v_curr.ptr[2u] = v_fa2;
        v_curr.ptr += 3;
        v_prev.ptr += 3;
      }
      v_curr.len = 0;
      v_prev.len = 0;
    }
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.filter_3_distance_4_fallback

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3_distance_4_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  uint8_t v_fa0 = 0;
  uint8_t v_fa1 = 0;
  uint8_t v_fa2 = 0;
  uint8_t v_fa3 = 0;

  if (((uint64_t)(a_prev.len)) == 0u) {
    {
      wuffs_base__slice_u8 i_slice_curr = a_curr;
      v_curr.ptr = i_slice_curr.ptr;
      v_curr.len = 4;
      const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
      while (v_curr.ptr < i_end0_curr) {
        v_fa0 = ((uint8_t)(((uint8_t)(v_fa0 / 2u)) + v_curr.ptr[0u]));
        v_curr.ptr[0u] = v_fa0;
        v_fa1 = ((uint8_t)(((uint8_t)(v_fa1 / 2u)) + v_curr.ptr[1u]));
        v_curr.ptr[1u] = v_fa1;
        v_fa2 = ((uint8_t)(((uint8_t)(v_fa2 / 2u)) + v_curr.ptr[2u]));
        v_curr.ptr[2u] = v_fa2;
        v_fa3 = ((uint8_t)(((uint8_t)(v_fa3 / 2u)) + v_curr.ptr[3u]));
        v_curr.ptr[3u] = v_fa3;
        v_curr.ptr += 4;
      }
      v_curr.len = 0;
    }
  } else {
    {
      wuffs_base__slice_u8 i_slice_curr = a_curr;
      v_curr.ptr = i_slice_curr.ptr;
      wuffs_base__slice_u8 i_slice_prev = a_prev;
      v_prev.ptr = i_slice_prev.ptr;
      i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
      v_curr.len = 4;
      v_prev.len = 4;
      const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
      while (v_curr.ptr < i_end0_curr) {
        v_fa0 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa0)) + ((uint32_t)(v_prev.ptr[0u]))) / 2u))) + v_curr.ptr[0u]));
        v_curr.ptr[0u] = v_fa0;
        v_fa1 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa1)) + ((uint32_t)(v_prev.ptr[1u]))) / 2u))) + v_curr.ptr[1u]));
        v_curr.ptr[1u] = v_fa1;
        v_fa2 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa2)) + ((uint32_t)(v_prev.ptr[2u]))) / 2u))) + v_curr.ptr[2u]));
        v_curr.ptr[2u] = v_fa2;
        v_fa3 = ((uint8_t)(((uint8_t)(((((uint32_t)(v_fa3)) + ((uint32_t)(v_prev.ptr[3u]))) / 2u))) + v_curr.ptr[3u]));
        v_curr.ptr[3u] = v_fa3;
        v_curr.ptr += 4;
        v_prev.ptr += 4;
      }
      v_curr.len = 0;
      v_prev.len = 0;
    }
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.filter_4

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  return (*self->private_impl.choosy_filter_4)(self, a_curr, a_prev);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4__choosy_default(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  uint64_t v_filter_distance = 0;
  uint64_t v_n = 0;
  uint64_t v_i = 0;
  uint32_t v_fa = 0;
  uint32_t v_fb = 0;
  uint32_t v_fc = 0;
  uint32_t v_pp = 0;
  uint32_t v_pa = 0;
  uint32_t v_pb = 0;
  uint32_t v_pc = 0;

  v_filter_distance = ((uint64_t)(self->private_impl.f_filter_distance));
  v_n = wuffs_base__u64__min(((uint64_t)(a_curr.len)), ((uint64_t)(a_prev.len)));
  v_i = 0u;
  while ((v_i < v_n) && (v_i < v_filter_distance)) {
    a_curr.ptr[v_i] = ((uint8_t)(a_curr.ptr[v_i] + a_prev.ptr[v_i]));
    v_i += 1u;
  }
  v_i = v_filter_distance;
  while (v_i < v_n) {
    v_fa = ((uint32_t)(a_curr.ptr[(v_i - v_filter_distance)]));
    v_fb = ((uint32_t)(a_prev.ptr[v_i]));
    v_fc = ((uint32_t)(a_prev.ptr[(v_i - v_filter_distance)]));
    v_pp = ((uint32_t)(((uint32_t)(v_fa + v_fb)) - v_fc));
    v_pa = ((uint32_t)(v_pp - v_fa));
    if (v_pa >= 2147483648u) {
      v_pa = ((uint32_t)(0u - v_pa));
    }
    v_pb = ((uint32_t)(v_pp - v_fb));
    if (v_pb >= 2147483648u) {
      v_pb = ((uint32_t)(0u - v_pb));
    }
    v_pc = ((uint32_t)(v_pp - v_fc));
    if (v_pc >= 2147483648u) {
      v_pc = ((uint32_t)(0u - v_pc));
    }
    if ((v_pa <= v_pb) && (v_pa <= v_pc)) {
    } else if (v_pb <= v_pc) {
      v_fa = v_fb;
    } else {
      v_fa = v_fc;
    }
    a_curr.ptr[v_i] = ((uint8_t)(a_curr.ptr[v_i] + ((uint8_t)(v_fa))));
    v_i += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.filter_4_distance_3_fallback

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_3_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  uint32_t v_fa0 = 0;
  uint32_t v_fa1 = 0;
  uint32_t v_fa2 = 0;
  uint32_t v_fb0 = 0;
  uint32_t v_fb1 = 0;
  uint32_t v_fb2 = 0;
  uint32_t v_fc0 = 0;
  uint32_t v_fc1 = 0;
  uint32_t v_fc2 = 0;
  uint32_t v_pp0 = 0;
  uint32_t v_pp1 = 0;
  uint32_t v_pp2 = 0;
  uint32_t v_pa0 = 0;
  uint32_t v_pa1 = 0;
  uint32_t v_pa2 = 0;
  uint32_t v_pb0 = 0;
  uint32_t v_pb1 = 0;
  uint32_t v_pb2 = 0;
  uint32_t v_pc0 = 0;
  uint32_t v_pc1 = 0;
  uint32_t v_pc2 = 0;

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    wuffs_base__slice_u8 i_slice_prev = a_prev;
    v_prev.ptr = i_slice_prev.ptr;
    i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
    v_curr.len = 3;
    v_prev.len = 3;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 3) * 3));
    while (v_curr.ptr < i_end0_curr) {
      v_fb0 = ((uint32_t)(v_prev.ptr[0u]));
      v_pp0 = ((uint32_t)(((uint32_t)(v_fa0 + v_fb0)) - v_fc0));
      v_pa0 = ((uint32_t)(v_pp0 - v_fa0));
      if (v_pa0 >= 2147483648u) {
        v_pa0 = ((uint32_t)(0u - v_pa0));
      }
      v_pb0 = ((uint32_t)(v_pp0 - v_fb0));
      if (v_pb0 >= 2147483648u) {
        v_pb0 = ((uint32_t)(0u - v_pb0));
      }
      v_pc0 = ((uint32_t)(v_pp0 - v_fc0));
      if (v_pc0 >= 2147483648u) {
        v_pc0 = ((uint32_t)(0u - v_pc0));
      }
      if ((v_pa0 <= v_pb0) && (v_pa0 <= v_pc0)) {
      } else if (v_pb0 <= v_pc0) {
        v_fa0 = v_fb0;
      } else {
        v_fa0 = v_fc0;
      }
      v_curr.ptr[0u] = ((uint8_t)(v_curr.ptr[0u] + ((uint8_t)(v_fa0))));
      v_fa0 = ((uint32_t)(v_curr.ptr[0u]));
      v_fc0 = v_fb0;
      v_fb1 = ((uint32_t)(v_prev.ptr[1u]));
      v_pp1 = ((uint32_t)(((uint32_t)(v_fa1 + v_fb1)) - v_fc1));
      v_pa1 = ((uint32_t)(v_pp1 - v_fa1));
      if (v_pa1 >= 2147483648u) {
        v_pa1 = ((uint32_t)(0u - v_pa1));
      }
      v_pb1 = ((uint32_t)(v_pp1 - v_fb1));
      if (v_pb1 >= 2147483648u) {
        v_pb1 = ((uint32_t)(0u - v_pb1));
      }
      v_pc1 = ((uint32_t)(v_pp1 - v_fc1));
      if (v_pc1 >= 2147483648u) {
        v_pc1 = ((uint32_t)(0u - v_pc1));
      }
      if ((v_pa1 <= v_pb1) && (v_pa1 <= v_pc1)) {
      } else if (v_pb1 <= v_pc1) {
        v_fa1 = v_fb1;
      } else {
        v_fa1 = v_fc1;
      }
      v_curr.ptr[1u] = ((uint8_t)(v_curr.ptr[1u] + ((uint8_t)(v_fa1))));
      v_fa1 = ((uint32_t)(v_curr.ptr[1u]));
      v_fc1 = v_fb1;
      v_fb2 = ((uint32_t)(v_prev.ptr[2u]));
      v_pp2 = ((uint32_t)(((uint32_t)(v_fa2 + v_fb2)) - v_fc2));
      v_pa2 = ((uint32_t)(v_pp2 - v_fa2));
      if (v_pa2 >= 2147483648u) {
        v_pa2 = ((uint32_t)(0u - v_pa2));
      }
      v_pb2 = ((uint32_t)(v_pp2 - v_fb2));
      if (v_pb2 >= 2147483648u) {
        v_pb2 = ((uint32_t)(0u - v_pb2));
      }
      v_pc2 = ((uint32_t)(v_pp2 - v_fc2));
      if (v_pc2 >= 2147483648u) {
        v_pc2 = ((uint32_t)(0u - v_pc2));
      }
      if ((v_pa2 <= v_pb2) && (v_pa2 <= v_pc2)) {
      } else if (v_pb2 <= v_pc2) {
        v_fa2 = v_fb2;
      } else {
        v_fa2 = v_fc2;
      }
      v_curr.ptr[2u] = ((uint8_t)(v_curr.ptr[2u] + ((uint8_t)(v_fa2))));
      v_fa2 = ((uint32_t)(v_curr.ptr[2u]));
      v_fc2 = v_fb2;
      v_curr.ptr += 3;
      v_prev.ptr += 3;
    }
    v_curr.len = 0;
    v_prev.len = 0;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.filter_4_distance_4_fallback

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_4_fallback(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  uint32_t v_fa0 = 0;
  uint32_t v_fa1 = 0;
  uint32_t v_fa2 = 0;
  uint32_t v_fa3 = 0;
  uint32_t v_fb0 = 0;
  uint32_t v_fb1 = 0;
  uint32_t v_fb2 = 0;
  uint32_t v_fb3 = 0;
  uint32_t v_fc0 = 0;
  uint32_t v_fc1 = 0;
  uint32_t v_fc2 = 0;
  uint32_t v_fc3 = 0;
  uint32_t v_pp0 = 0;
  uint32_t v_pp1 = 0;
  uint32_t v_pp2 = 0;
  uint32_t v_pp3 = 0;
  uint32_t v_pa0 = 0;
  uint32_t v_pa1 = 0;
  uint32_t v_pa2 = 0;
  uint32_t v_pa3 = 0;
  uint32_t v_pb0 = 0;
  uint32_t v_pb1 = 0;
  uint32_t v_pb2 = 0;
  uint32_t v_pb3 = 0;
  uint32_t v_pc0 = 0;
  uint32_t v_pc1 = 0;
  uint32_t v_pc2 = 0;
  uint32_t v_pc3 = 0;

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    wuffs_base__slice_u8 i_slice_prev = a_prev;
    v_prev.ptr = i_slice_prev.ptr;
    i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
    v_curr.len = 4;
    v_prev.len = 4;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
    while (v_curr.ptr < i_end0_curr) {
      v_fb0 = ((uint32_t)(v_prev.ptr[0u]));
      v_pp0 = ((uint32_t)(((uint32_t)(v_fa0 + v_fb0)) - v_fc0));
      v_pa0 = ((uint32_t)(v_pp0 - v_fa0));
      if (v_pa0 >= 2147483648u) {
        v_pa0 = ((uint32_t)(0u - v_pa0));
      }
      v_pb0 = ((uint32_t)(v_pp0 - v_fb0));
      if (v_pb0 >= 2147483648u) {
        v_pb0 = ((uint32_t)(0u - v_pb0));
      }
      v_pc0 = ((uint32_t)(v_pp0 - v_fc0));
      if (v_pc0 >= 2147483648u) {
        v_pc0 = ((uint32_t)(0u - v_pc0));
      }
      if ((v_pa0 <= v_pb0) && (v_pa0 <= v_pc0)) {
      } else if (v_pb0 <= v_pc0) {
        v_fa0 = v_fb0;
      } else {
        v_fa0 = v_fc0;
      }
      v_curr.ptr[0u] = ((uint8_t)(v_curr.ptr[0u] + ((uint8_t)(v_fa0))));
      v_fa0 = ((uint32_t)(v_curr.ptr[0u]));
      v_fc0 = v_fb0;
      v_fb1 = ((uint32_t)(v_prev.ptr[1u]));
      v_pp1 = ((uint32_t)(((uint32_t)(v_fa1 + v_fb1)) - v_fc1));
      v_pa1 = ((uint32_t)(v_pp1 - v_fa1));
      if (v_pa1 >= 2147483648u) {
        v_pa1 = ((uint32_t)(0u - v_pa1));
      }
      v_pb1 = ((uint32_t)(v_pp1 - v_fb1));
      if (v_pb1 >= 2147483648u) {
        v_pb1 = ((uint32_t)(0u - v_pb1));
      }
      v_pc1 = ((uint32_t)(v_pp1 - v_fc1));
      if (v_pc1 >= 2147483648u) {
        v_pc1 = ((uint32_t)(0u - v_pc1));
      }
      if ((v_pa1 <= v_pb1) && (v_pa1 <= v_pc1)) {
      } else if (v_pb1 <= v_pc1) {
        v_fa1 = v_fb1;
      } else {
        v_fa1 = v_fc1;
      }
      v_curr.ptr[1u] = ((uint8_t)(v_curr.ptr[1u] + ((uint8_t)(v_fa1))));
      v_fa1 = ((uint32_t)(v_curr.ptr[1u]));
      v_fc1 = v_fb1;
      v_fb2 = ((uint32_t)(v_prev.ptr[2u]));
      v_pp2 = ((uint32_t)(((uint32_t)(v_fa2 + v_fb2)) - v_fc2));
      v_pa2 = ((uint32_t)(v_pp2 - v_fa2));
      if (v_pa2 >= 2147483648u) {
        v_pa2 = ((uint32_t)(0u - v_pa2));
      }
      v_pb2 = ((uint32_t)(v_pp2 - v_fb2));
      if (v_pb2 >= 2147483648u) {
        v_pb2 = ((uint32_t)(0u - v_pb2));
      }
      v_pc2 = ((uint32_t)(v_pp2 - v_fc2));
      if (v_pc2 >= 2147483648u) {
        v_pc2 = ((uint32_t)(0u - v_pc2));
      }
      if ((v_pa2 <= v_pb2) && (v_pa2 <= v_pc2)) {
      } else if (v_pb2 <= v_pc2) {
        v_fa2 = v_fb2;
      } else {
        v_fa2 = v_fc2;
      }
      v_curr.ptr[2u] = ((uint8_t)(v_curr.ptr[2u] + ((uint8_t)(v_fa2))));
      v_fa2 = ((uint32_t)(v_curr.ptr[2u]));
      v_fc2 = v_fb2;
      v_fb3 = ((uint32_t)(v_prev.ptr[3u]));
      v_pp3 = ((uint32_t)(((uint32_t)(v_fa3 + v_fb3)) - v_fc3));
      v_pa3 = ((uint32_t)(v_pp3 - v_fa3));
      if (v_pa3 >= 2147483648u) {
        v_pa3 = ((uint32_t)(0u - v_pa3));
      }
      v_pb3 = ((uint32_t)(v_pp3 - v_fb3));
      if (v_pb3 >= 2147483648u) {
        v_pb3 = ((uint32_t)(0u - v_pb3));
      }
      v_pc3 = ((uint32_t)(v_pp3 - v_fc3));
      if (v_pc3 >= 2147483648u) {
        v_pc3 = ((uint32_t)(0u - v_pc3));
      }
      if ((v_pa3 <= v_pb3) && (v_pa3 <= v_pc3)) {
      } else if (v_pb3 <= v_pc3) {
        v_fa3 = v_fb3;
      } else {
        v_fa3 = v_fc3;
      }
      v_curr.ptr[3u] = ((uint8_t)(v_curr.ptr[3u] + ((uint8_t)(v_fa3))));
      v_fa3 = ((uint32_t)(v_curr.ptr[3u]));
      v_fc3 = v_fb3;
      v_curr.ptr += 4;
      v_prev.ptr += 4;
    }
    v_curr.len = 0;
    v_prev.len = 0;
  }
  return wuffs_base__make_empty_struct();
}

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
// -------- func png.decoder.filter_1_distance_4_x86_sse42

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_1_distance_4_x86_sse42(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr) {
  wuffs_base__slice_u8 v_curr = {0};
  __m128i v_x128 = {0};
  __m128i v_a128 = {0};

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    v_curr.len = 4;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 8) * 8));
    while (v_curr.ptr < i_end0_curr) {
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_add_epi8(v_x128, v_a128);
      v_a128 = v_x128;
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 4;
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_add_epi8(v_x128, v_a128);
      v_a128 = v_x128;
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 4;
    }
    v_curr.len = 4;
    const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
    while (v_curr.ptr < i_end1_curr) {
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_add_epi8(v_x128, v_a128);
      v_a128 = v_x128;
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 4;
    }
    v_curr.len = 0;
  }
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
// -------- func png.decoder.filter_3_distance_4_x86_sse42

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_3_distance_4_x86_sse42(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  __m128i v_x128 = {0};
  __m128i v_a128 = {0};
  __m128i v_b128 = {0};
  __m128i v_p128 = {0};
  __m128i v_k128 = {0};

  if (((uint64_t)(a_prev.len)) == 0u) {
    v_k128 = _mm_set1_epi8((int8_t)(254u));
    {
      wuffs_base__slice_u8 i_slice_curr = a_curr;
      v_curr.ptr = i_slice_curr.ptr;
      v_curr.len = 4;
      const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 8) * 8));
      while (v_curr.ptr < i_end0_curr) {
        v_p128 = _mm_avg_epu8(_mm_and_si128(v_a128, v_k128), v_b128);
        v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_x128 = _mm_add_epi8(v_x128, v_p128);
        v_a128 = v_x128;
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
        v_curr.ptr += 4;
        v_p128 = _mm_avg_epu8(_mm_and_si128(v_a128, v_k128), v_b128);
        v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_x128 = _mm_add_epi8(v_x128, v_p128);
        v_a128 = v_x128;
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
        v_curr.ptr += 4;
      }
      v_curr.len = 4;
      const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
      while (v_curr.ptr < i_end1_curr) {
        v_p128 = _mm_avg_epu8(_mm_and_si128(v_a128, v_k128), v_b128);
        v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_x128 = _mm_add_epi8(v_x128, v_p128);
        v_a128 = v_x128;
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
        v_curr.ptr += 4;
      }
      v_curr.len = 0;
    }
  } else {
    v_k128 = _mm_set1_epi8((int8_t)(1u));
    {
      wuffs_base__slice_u8 i_slice_curr = a_curr;
      v_curr.ptr = i_slice_curr.ptr;
      wuffs_base__slice_u8 i_slice_prev = a_prev;
      v_prev.ptr = i_slice_prev.ptr;
      i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
      v_curr.len = 4;
      v_prev.len = 4;
      const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 8) * 8));
      while (v_curr.ptr < i_end0_curr) {
        v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
        v_p128 = _mm_avg_epu8(v_a128, v_b128);
        v_p128 = _mm_sub_epi8(v_p128, _mm_and_si128(v_k128, _mm_xor_si128(v_a128, v_b128)));
        v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_x128 = _mm_add_epi8(v_x128, v_p128);
        v_a128 = v_x128;
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
        v_curr.ptr += 4;
        v_prev.ptr += 4;
        v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
        v_p128 = _mm_avg_epu8(v_a128, v_b128);
        v_p128 = _mm_sub_epi8(v_p128, _mm_and_si128(v_k128, _mm_xor_si128(v_a128, v_b128)));
        v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_x128 = _mm_add_epi8(v_x128, v_p128);
        v_a128 = v_x128;
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
        v_curr.ptr += 4;
        v_prev.ptr += 4;
      }
      v_curr.len = 4;
      v_prev.len = 4;
      const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
      while (v_curr.ptr < i_end1_curr) {
        v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
        v_p128 = _mm_avg_epu8(v_a128, v_b128);
        v_p128 = _mm_sub_epi8(v_p128, _mm_and_si128(v_k128, _mm_xor_si128(v_a128, v_b128)));
        v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
        v_x128 = _mm_add_epi8(v_x128, v_p128);
        v_a128 = v_x128;
        wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
        v_curr.ptr += 4;
        v_prev.ptr += 4;
      }
      v_curr.len = 0;
      v_prev.len = 0;
    }
  }
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
// -------- func png.decoder.filter_4_distance_3_x86_sse42

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_3_x86_sse42(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  __m128i v_x128 = {0};
  __m128i v_a128 = {0};
  __m128i v_b128 = {0};
  __m128i v_c128 = {0};
  __m128i v_p128 = {0};
  __m128i v_pa128 = {0};
  __m128i v_pb128 = {0};
  __m128i v_pc128 = {0};
  __m128i v_smallest128 = {0};
  __m128i v_z128 = {0};

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    wuffs_base__slice_u8 i_slice_prev = a_prev;
    v_prev.ptr = i_slice_prev.ptr;
    i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
    v_curr.len = 4;
    v_prev.len = 4;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, wuffs_private_impl__iterate_total_advance((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)), 7, 6));
    while (v_curr.ptr < i_end0_curr) {
      v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_b128 = _mm_unpacklo_epi8(v_b128, v_z128);
      v_pa128 = _mm_sub_epi16(v_b128, v_c128);
      v_pb128 = _mm_sub_epi16(v_a128, v_c128);
      v_pc128 = _mm_add_epi16(v_pa128, v_pb128);
      v_pa128 = _mm_abs_epi16(v_pa128);
      v_pb128 = _mm_abs_epi16(v_pb128);
      v_pc128 = _mm_abs_epi16(v_pc128);
      v_smallest128 = _mm_min_epi16(v_pc128, _mm_min_epi16(v_pb128, v_pa128));
      v_p128 = _mm_blendv_epi8(_mm_blendv_epi8(v_c128, v_b128, _mm_cmpeq_epi16(v_smallest128, v_pb128)), v_a128, _mm_cmpeq_epi16(v_smallest128, v_pa128));
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_unpacklo_epi8(v_x128, v_z128);
      v_x128 = _mm_add_epi8(v_x128, v_p128);
      v_a128 = v_x128;
      v_c128 = v_b128;
      v_x128 = _mm_packus_epi16(v_x128, v_x128);
      wuffs_base__poke_u24le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 3;
      v_prev.ptr += 3;
      v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_b128 = _mm_unpacklo_epi8(v_b128, v_z128);
      v_pa128 = _mm_sub_epi16(v_b128, v_c128);
      v_pb128 = _mm_sub_epi16(v_a128, v_c128);
      v_pc128 = _mm_add_epi16(v_pa128, v_pb128);
      v_pa128 = _mm_abs_epi16(v_pa128);
      v_pb128 = _mm_abs_epi16(v_pb128);
      v_pc128 = _mm_abs_epi16(v_pc128);
      v_smallest128 = _mm_min_epi16(v_pc128, _mm_min_epi16(v_pb128, v_pa128));
      v_p128 = _mm_blendv_epi8(_mm_blendv_epi8(v_c128, v_b128, _mm_cmpeq_epi16(v_smallest128, v_pb128)), v_a128, _mm_cmpeq_epi16(v_smallest128, v_pa128));
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_unpacklo_epi8(v_x128, v_z128);
      v_x128 = _mm_add_epi8(v_x128, v_p128);
      v_a128 = v_x128;
      v_c128 = v_b128;
      v_x128 = _mm_packus_epi16(v_x128, v_x128);
      wuffs_base__poke_u24le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 3;
      v_prev.ptr += 3;
    }
    v_curr.len = 4;
    v_prev.len = 4;
    const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, wuffs_private_impl__iterate_total_advance((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)), 4, 3));
    while (v_curr.ptr < i_end1_curr) {
      v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_b128 = _mm_unpacklo_epi8(v_b128, v_z128);
      v_pa128 = _mm_sub_epi16(v_b128, v_c128);
      v_pb128 = _mm_sub_epi16(v_a128, v_c128);
      v_pc128 = _mm_add_epi16(v_pa128, v_pb128);
      v_pa128 = _mm_abs_epi16(v_pa128);
      v_pb128 = _mm_abs_epi16(v_pb128);
      v_pc128 = _mm_abs_epi16(v_pc128);
      v_smallest128 = _mm_min_epi16(v_pc128, _mm_min_epi16(v_pb128, v_pa128));
      v_p128 = _mm_blendv_epi8(_mm_blendv_epi8(v_c128, v_b128, _mm_cmpeq_epi16(v_smallest128, v_pb128)), v_a128, _mm_cmpeq_epi16(v_smallest128, v_pa128));
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_unpacklo_epi8(v_x128, v_z128);
      v_x128 = _mm_add_epi8(v_x128, v_p128);
      v_a128 = v_x128;
      v_c128 = v_b128;
      v_x128 = _mm_packus_epi16(v_x128, v_x128);
      wuffs_base__poke_u24le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 3;
      v_prev.ptr += 3;
    }
    v_curr.len = 3;
    v_prev.len = 3;
    const uint8_t* i_end2_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 3) * 3));
    while (v_curr.ptr < i_end2_curr) {
      v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u24le__no_bounds_check(v_prev.ptr)));
      v_b128 = _mm_unpacklo_epi8(v_b128, v_z128);
      v_pa128 = _mm_sub_epi16(v_b128, v_c128);
      v_pb128 = _mm_sub_epi16(v_a128, v_c128);
      v_pc128 = _mm_add_epi16(v_pa128, v_pb128);
      v_pa128 = _mm_abs_epi16(v_pa128);
      v_pb128 = _mm_abs_epi16(v_pb128);
      v_pc128 = _mm_abs_epi16(v_pc128);
      v_smallest128 = _mm_min_epi16(v_pc128, _mm_min_epi16(v_pb128, v_pa128));
      v_p128 = _mm_blendv_epi8(_mm_blendv_epi8(v_c128, v_b128, _mm_cmpeq_epi16(v_smallest128, v_pb128)), v_a128, _mm_cmpeq_epi16(v_smallest128, v_pa128));
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u24le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_unpacklo_epi8(v_x128, v_z128);
      v_x128 = _mm_add_epi8(v_x128, v_p128);
      v_x128 = _mm_packus_epi16(v_x128, v_x128);
      wuffs_base__poke_u24le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 3;
      v_prev.ptr += 3;
    }
    v_curr.len = 0;
    v_prev.len = 0;
  }
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

// ‼ WUFFS MULTI-FILE SECTION +x86_sse42
// -------- func png.decoder.filter_4_distance_4_x86_sse42

#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
WUFFS_BASE__MAYBE_ATTRIBUTE_TARGET("pclmul,popcnt,sse4.2")
WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__filter_4_distance_4_x86_sse42(
    wuffs_png__decoder* self,
    wuffs_base__slice_u8 a_curr,
    wuffs_base__slice_u8 a_prev) {
  wuffs_base__slice_u8 v_curr = {0};
  wuffs_base__slice_u8 v_prev = {0};
  __m128i v_x128 = {0};
  __m128i v_a128 = {0};
  __m128i v_b128 = {0};
  __m128i v_c128 = {0};
  __m128i v_p128 = {0};
  __m128i v_pa128 = {0};
  __m128i v_pb128 = {0};
  __m128i v_pc128 = {0};
  __m128i v_smallest128 = {0};
  __m128i v_z128 = {0};

  {
    wuffs_base__slice_u8 i_slice_curr = a_curr;
    v_curr.ptr = i_slice_curr.ptr;
    wuffs_base__slice_u8 i_slice_prev = a_prev;
    v_prev.ptr = i_slice_prev.ptr;
    i_slice_curr.len = ((size_t)(wuffs_base__u64__min(i_slice_curr.len, i_slice_prev.len)));
    v_curr.len = 4;
    v_prev.len = 4;
    const uint8_t* i_end0_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 8) * 8));
    while (v_curr.ptr < i_end0_curr) {
      v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_b128 = _mm_unpacklo_epi8(v_b128, v_z128);
      v_pa128 = _mm_sub_epi16(v_b128, v_c128);
      v_pb128 = _mm_sub_epi16(v_a128, v_c128);
      v_pc128 = _mm_add_epi16(v_pa128, v_pb128);
      v_pa128 = _mm_abs_epi16(v_pa128);
      v_pb128 = _mm_abs_epi16(v_pb128);
      v_pc128 = _mm_abs_epi16(v_pc128);
      v_smallest128 = _mm_min_epi16(v_pc128, _mm_min_epi16(v_pb128, v_pa128));
      v_p128 = _mm_blendv_epi8(_mm_blendv_epi8(v_c128, v_b128, _mm_cmpeq_epi16(v_smallest128, v_pb128)), v_a128, _mm_cmpeq_epi16(v_smallest128, v_pa128));
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_unpacklo_epi8(v_x128, v_z128);
      v_x128 = _mm_add_epi8(v_x128, v_p128);
      v_a128 = v_x128;
      v_c128 = v_b128;
      v_x128 = _mm_packus_epi16(v_x128, v_x128);
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 4;
      v_prev.ptr += 4;
      v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_b128 = _mm_unpacklo_epi8(v_b128, v_z128);
      v_pa128 = _mm_sub_epi16(v_b128, v_c128);
      v_pb128 = _mm_sub_epi16(v_a128, v_c128);
      v_pc128 = _mm_add_epi16(v_pa128, v_pb128);
      v_pa128 = _mm_abs_epi16(v_pa128);
      v_pb128 = _mm_abs_epi16(v_pb128);
      v_pc128 = _mm_abs_epi16(v_pc128);
      v_smallest128 = _mm_min_epi16(v_pc128, _mm_min_epi16(v_pb128, v_pa128));
      v_p128 = _mm_blendv_epi8(_mm_blendv_epi8(v_c128, v_b128, _mm_cmpeq_epi16(v_smallest128, v_pb128)), v_a128, _mm_cmpeq_epi16(v_smallest128, v_pa128));
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_unpacklo_epi8(v_x128, v_z128);
      v_x128 = _mm_add_epi8(v_x128, v_p128);
      v_a128 = v_x128;
      v_c128 = v_b128;
      v_x128 = _mm_packus_epi16(v_x128, v_x128);
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 4;
      v_prev.ptr += 4;
    }
    v_curr.len = 4;
    v_prev.len = 4;
    const uint8_t* i_end1_curr = wuffs_private_impl__ptr_u8_plus_len(v_curr.ptr, (((i_slice_curr.len - (size_t)(v_curr.ptr - i_slice_curr.ptr)) / 4) * 4));
    while (v_curr.ptr < i_end1_curr) {
      v_b128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_prev.ptr)));
      v_b128 = _mm_unpacklo_epi8(v_b128, v_z128);
      v_pa128 = _mm_sub_epi16(v_b128, v_c128);
      v_pb128 = _mm_sub_epi16(v_a128, v_c128);
      v_pc128 = _mm_add_epi16(v_pa128, v_pb128);
      v_pa128 = _mm_abs_epi16(v_pa128);
      v_pb128 = _mm_abs_epi16(v_pb128);
      v_pc128 = _mm_abs_epi16(v_pc128);
      v_smallest128 = _mm_min_epi16(v_pc128, _mm_min_epi16(v_pb128, v_pa128));
      v_p128 = _mm_blendv_epi8(_mm_blendv_epi8(v_c128, v_b128, _mm_cmpeq_epi16(v_smallest128, v_pb128)), v_a128, _mm_cmpeq_epi16(v_smallest128, v_pa128));
      v_x128 = _mm_cvtsi32_si128((int32_t)(wuffs_base__peek_u32le__no_bounds_check(v_curr.ptr)));
      v_x128 = _mm_unpacklo_epi8(v_x128, v_z128);
      v_x128 = _mm_add_epi8(v_x128, v_p128);
      v_a128 = v_x128;
      v_c128 = v_b128;
      v_x128 = _mm_packus_epi16(v_x128, v_x128);
      wuffs_base__poke_u32le__no_bounds_check(v_curr.ptr, ((uint32_t)(_mm_cvtsi128_si32(v_x128))));
      v_curr.ptr += 4;
      v_prev.ptr += 4;
    }
    v_curr.len = 0;
    v_prev.len = 0;
  }
  return wuffs_base__make_empty_struct();
}
#endif  // defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
// ‼ WUFFS MULTI-FILE SECTION -x86_sse42

// -------- func png.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_png__decoder__get_quirk(
    const wuffs_png__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if ((a_key == 1u) && self->private_impl.f_ignore_checksum) {
    return 1u;
  }
  return 0u;
}

// -------- func png.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__set_quirk(
    wuffs_png__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (a_key == 1u) {
    self->private_impl.f_ignore_checksum = (a_value > 0u);
    wuffs_zlib__decoder__set_quirk(&self->private_data.f_zlib, a_key, a_value);
    return wuffs_base__make_status(NULL);
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func png.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__decode_image_config(
    wuffs_png__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_png__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_png__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func png.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__do_decode_image_config(
    wuffs_png__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_magic = 0;
  uint64_t v_mark = 0;
  uint32_t v_checksum_have = 0;
  uint32_t v_checksum_want = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  if (coro_susp_point) {
    v_checksum_have = self->private_data.s_do_decode_image_config.v_checksum_have;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    } else if ( ! self->private_impl.f_seen_ihdr) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        uint64_t t_0;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
          t_0 = wuffs_base__peek_u64le__no_bounds_check(iop_a_src);
          iop_a_src += 8;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
            if (num_bits_0 == 56) {
              t_0 = ((uint64_t)(*scratch));
              break;
            }
            num_bits_0 += 8u;
            *scratch |= ((uint64_t)(num_bits_0)) << 56;
          }
        }
        v_magic = t_0;
      }
      if (v_magic != 727905341920923785u) {
        status = wuffs_base__make_status(wuffs_png__error__bad_header);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        uint64_t t_1;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
          t_1 = wuffs_base__peek_u64le__no_bounds_check(iop_a_src);
          iop_a_src += 8;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
            if (num_bits_1 == 56) {
              t_1 = ((uint64_t)(*scratch));
              break;
            }
            num_bits_1 += 8u;
            *scratch |= ((uint64_t)(num_bits_1)) << 56;
          }
        }
        v_magic = t_1;
      }
      if (v_magic != 5927942488114331648u) {
        if (v_magic == 5278895250759221248u) {
          status = wuffs_base__make_status(wuffs_png__error__unsupported_cgbi_extension);
          goto exit;
        }
        status = wuffs_base__make_status(wuffs_png__error__bad_header);
        goto exit;
      }
      self->private_impl.f_chunk_type_array[0u] = 73u;
      self->private_impl.f_chunk_type_array[1u] = 72u;
      self->private_impl.f_chunk_type_array[2u] = 68u;
      self->private_impl.f_chunk_type_array[3u] = 82u;
      wuffs_private_impl__ignore_status(wuffs_crc32__ieee_hasher__initialize(&self->private_data.f_crc32,
          sizeof (wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
      wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_base__make_slice_u8(self->private_impl.f_chunk_type_array, 4));
      while (true) {
        v_mark = ((uint64_t)(iop_a_src - io0_a_src));
        {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          wuffs_base__status t_2 = wuffs_png__decoder__decode_ihdr(self, a_src);
          v_status = t_2;
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        if ( ! self->private_impl.f_ignore_checksum) {
          v_checksum_have = wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_private_impl__io__since(v_mark, ((uint64_t)(iop_a_src - io0_a_src)), io0_a_src));
        }
        if (wuffs_base__status__is_ok(&v_status)) {
          break;
        }
        status = v_status;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        uint32_t t_3;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_3 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_3 = ((uint32_t)(*scratch & 0xFFu));
            *scratch >>= 8;
            *scratch <<= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_3);
            if (num_bits_3 == 24) {
              t_3 = ((uint32_t)(*scratch >> 32));
              break;
            }
            num_bits_3 += 8u;
            *scratch |= ((uint64_t)(num_bits_3));
          }
        }
        v_checksum_want = t_3;
      }
      if ( ! self->private_impl.f_ignore_checksum && (v_checksum_have != v_checksum_want)) {
        status = wuffs_base__make_status(wuffs_png__error__bad_checksum);
        goto exit;
      }
      self->private_impl.f_seen_ihdr = true;
    } else if (self->private_impl.f_metadata_fourcc != 0u) {
      self->private_impl.f_call_sequence = 16u;
      status = wuffs_base__make_status(wuffs_base__note__metadata_reported);
      goto ok;
    }
    while (true) {
      if (((uint64_t)(io2_a_src - iop_a_src)) < 8u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(8);
        continue;
      }
      self->private_impl.f_chunk_length = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
      self->private_impl.f_chunk_type = ((uint32_t)((wuffs_base__peek_u64le__no_bounds_check(iop_a_src) >> 32u)));
      if (self->private_impl.f_chunk_type == 1413563465u) {
        if ( ! self->private_impl.f_seen_actl || self->private_impl.f_seen_fctl) {
          break;
        }
        self->private_impl.f_seen_idat = true;
      } else if (self->private_impl.f_chunk_type == 1413571686u) {
        if (self->private_impl.f_seen_idat && self->private_impl.f_seen_fctl) {
          break;
        }
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      }
      iop_a_src += 8u;
      if ( ! self->private_impl.f_ignore_checksum && ((self->private_impl.f_chunk_type & 32u) == 0u)) {
        self->private_impl.f_chunk_type_array[0u] = ((uint8_t)((self->private_impl.f_chunk_type >> 0u)));
        self->private_impl.f_chunk_type_array[1u] = ((uint8_t)((self->private_impl.f_chunk_type >> 8u)));
        self->private_impl.f_chunk_type_array[2u] = ((uint8_t)((self->private_impl.f_chunk_type >> 16u)));
        self->private_impl.f_chunk_type_array[3u] = ((uint8_t)((self->private_impl.f_chunk_type >> 24u)));
        wuffs_private_impl__ignore_status(wuffs_crc32__ieee_hasher__initialize(&self->private_data.f_crc32,
            sizeof (wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
        wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_base__make_slice_u8(self->private_impl.f_chunk_type_array, 4));
      }
      while (true) {
        v_mark = ((uint64_t)(iop_a_src - io0_a_src));
        {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          wuffs_base__status t_4 = wuffs_png__decoder__decode_other_chunk(self, a_src, false);
          v_status = t_4;
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        if ( ! self->private_impl.f_ignore_checksum && ((self->private_impl.f_chunk_type & 32u) == 0u)) {
          v_checksum_have = wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_private_impl__io__since(v_mark, ((uint64_t)(iop_a_src - io0_a_src)), io0_a_src));
        }
        if (wuffs_base__status__is_ok(&v_status)) {
          break;
        }
        status = v_status;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(9);
      }
      if (self->private_impl.f_metadata_fourcc != 0u) {
        self->private_impl.f_call_sequence = 16u;
        status = wuffs_base__make_status(wuffs_base__note__metadata_reported);
        goto ok;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
        uint32_t t_5;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_5 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_5 = ((uint32_t)(*scratch & 0xFFu));
            *scratch >>= 8;
            *scratch <<= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_5);
            if (num_bits_5 == 24) {
              t_5 = ((uint32_t)(*scratch >> 32));
              break;
            }
            num_bits_5 += 8u;
            *scratch |= ((uint64_t)(num_bits_5));
          }
        }
        v_checksum_want = t_5;
      }
      if ( ! self->private_impl.f_ignore_checksum && ((self->private_impl.f_chunk_type & 32u) == 0u) && (v_checksum_have != v_checksum_want)) {
        status = wuffs_base__make_status(wuffs_png__error__bad_checksum);
        goto exit;
      }
    }
    if ((self->private_impl.f_color_type == 3u) &&  ! self->private_impl.f_seen_plte) {
      status = wuffs_base__make_status(wuffs_png__error__missing_palette);
      goto exit;
    }
    self->private_impl.f_frame_config_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
    self->private_impl.f_first_config_io_position = self->private_impl.f_frame_config_io_position;
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          self->private_impl.f_dst_pixfmt,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          self->private_impl.f_first_config_io_position,
          ((self->private_impl.f_color_type <= 3u) &&  ! self->private_impl.f_seen_trns));
    }
    if ( ! self->private_impl.f_seen_actl) {
      self->private_impl.f_num_animation_frames_value = 1u;
      self->private_impl.f_first_rect_x0 = 0u;
      self->private_impl.f_first_rect_y0 = 0u;
      self->private_impl.f_first_rect_x1 = self->private_impl.f_width;
      self->private_impl.f_first_rect_y1 = self->private_impl.f_height;
      self->private_impl.f_first_duration = 0u;
      self->private_impl.f_first_disposal = 0u;
      self->private_impl.f_first_overwrite_instead_of_blend = false;
    }
    self->private_impl.f_call_sequence = 32u;

    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_image_config.v_checksum_have = v_checksum_have;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_ihdr

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_ihdr(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_a32 = 0;
  uint8_t v_a8 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_ihdr;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_ihdr.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_ihdr.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0));
        }
      }
      v_a32 = t_0;
    }
    if ((v_a32 == 0u) || (v_a32 > 2147483647u)) {
      status = wuffs_base__make_status(wuffs_png__error__bad_header);
      goto exit;
    } else if (v_a32 > 16777215u) {
      status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
      goto exit;
    }
    self->private_impl.f_width = v_a32;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_ihdr.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_ihdr.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1));
        }
      }
      v_a32 = t_1;
    }
    if ((v_a32 == 0u) || (v_a32 > 2147483647u)) {
      status = wuffs_base__make_status(wuffs_png__error__bad_header);
      goto exit;
    } else if (v_a32 > 16777215u) {
      status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
      goto exit;
    }
    self->private_impl.f_height = v_a32;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_2 = *iop_a_src++;
      v_a8 = t_2;
    }
    if (v_a8 > 16u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_header);
      goto exit;
    }
    self->private_impl.f_depth = v_a8;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_3 = *iop_a_src++;
      v_a8 = t_3;
    }
    if ((v_a8 == 1u) || (v_a8 == 5u) || (v_a8 > 6u)) {
      status = wuffs_base__make_status(wuffs_png__error__bad_header);
      goto exit;
    }
    self->private_impl.f_color_type = v_a8;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_4 = *iop_a_src++;
      v_a8 = t_4;
    }
    if (v_a8 != 0u) {
      status = wuffs_base__make_status(wuffs_png__error__unsupported_png_compression_method);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_5 = *iop_a_src++;
      v_a8 = t_5;
    }
    if (v_a8 != 0u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_6 = *iop_a_src++;
      v_a8 = t_6;
    }
    if (v_a8 == 0u) {
      self->private_impl.f_interlace_pass = 0u;
    } else if (v_a8 == 1u) {
      self->private_impl.f_interlace_pass = 1u;
      self->private_impl.choosy_filter_and_swizzle = (
          &wuffs_png__decoder__filter_and_swizzle_tricky);
    } else {
      status = wuffs_base__make_status(wuffs_png__error__bad_header);
      goto exit;
    }
    self->private_impl.f_filter_distance = 0u;
    wuffs_png__decoder__assign_filter_distance(self);
    if (self->private_impl.f_filter_distance == 0u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_header);
      goto exit;
    }
    self->private_impl.f_overall_workbuf_length = (((uint64_t)(self->private_impl.f_height)) * (1u + wuffs_png__decoder__calculate_bytes_per_row(self, self->private_impl.f_width)));
    wuffs_png__decoder__choose_filter_implementations(self);

    goto ok;
    ok:
    self->private_impl.p_decode_ihdr = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_ihdr = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.assign_filter_distance

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__assign_filter_distance(
    wuffs_png__decoder* self) {
  if (self->private_impl.f_depth < 8u) {
    if ((self->private_impl.f_depth != 1u) && (self->private_impl.f_depth != 2u) && (self->private_impl.f_depth != 4u)) {
      return wuffs_base__make_empty_struct();
    } else if (self->private_impl.f_color_type == 0u) {
      self->private_impl.f_dst_pixfmt = 536870920u;
      self->private_impl.f_src_pixfmt = 536870920u;
    } else if (self->private_impl.f_color_type == 3u) {
      self->private_impl.f_dst_pixfmt = 2198077448u;
      self->private_impl.f_src_pixfmt = 2198077448u;
    } else {
      return wuffs_base__make_empty_struct();
    }
    self->private_impl.f_filter_distance = 1u;
    self->private_impl.choosy_filter_and_swizzle = (
        &wuffs_png__decoder__filter_and_swizzle_tricky);
  } else if (self->private_impl.f_color_type == 0u) {
    if (self->private_impl.f_depth == 8u) {
      self->private_impl.f_dst_pixfmt = 536870920u;
      self->private_impl.f_src_pixfmt = 536870920u;
      self->private_impl.f_filter_distance = 1u;
    } else if (self->private_impl.f_depth == 16u) {
      if (self->private_impl.f_interlace_pass == 0u) {
        self->private_impl.f_dst_pixfmt = 536870923u;
        self->private_impl.f_src_pixfmt = 537919499u;
      } else {
        self->private_impl.f_dst_pixfmt = 2164308923u;
        self->private_impl.f_src_pixfmt = 2164308923u;
      }
      self->private_impl.f_filter_distance = 2u;
    }
  } else if (self->private_impl.f_color_type == 2u) {
    if (self->private_impl.f_depth == 8u) {
      self->private_impl.f_dst_pixfmt = 2147485832u;
      self->private_impl.f_src_pixfmt = 2684356744u;
      self->private_impl.f_filter_distance = 3u;
    } else if (self->private_impl.f_depth == 16u) {
      self->private_impl.f_dst_pixfmt = 2164308923u;
      self->private_impl.f_src_pixfmt = 2164308923u;
      self->private_impl.f_filter_distance = 6u;
      self->private_impl.choosy_filter_and_swizzle = (
          &wuffs_png__decoder__filter_and_swizzle_tricky);
    }
  } else if (self->private_impl.f_color_type == 3u) {
    if (self->private_impl.f_depth == 8u) {
      self->private_impl.f_dst_pixfmt = 2198077448u;
      self->private_impl.f_src_pixfmt = 2198077448u;
      self->private_impl.f_filter_distance = 1u;
    }
  } else if (self->private_impl.f_color_type == 4u) {
    if (self->private_impl.f_depth == 8u) {
      self->private_impl.f_dst_pixfmt = 553648264u;
      self->private_impl.f_src_pixfmt = 553648264u;
      self->private_impl.f_filter_distance = 2u;
    } else if (self->private_impl.f_depth == 16u) {
      self->private_impl.f_dst_pixfmt = 2164308923u;
      self->private_impl.f_src_pixfmt = 2164308923u;
      self->private_impl.f_filter_distance = 4u;
      self->private_impl.choosy_filter_and_swizzle = (
          &wuffs_png__decoder__filter_and_swizzle_tricky);
    }
  } else if (self->private_impl.f_color_type == 6u) {
    if (self->private_impl.f_depth == 8u) {
      self->private_impl.f_dst_pixfmt = 2164295816u;
      self->private_impl.f_src_pixfmt = 2701166728u;
      self->private_impl.f_filter_distance = 4u;
    } else if (self->private_impl.f_depth == 16u) {
      self->private_impl.f_dst_pixfmt = 2164308923u;
      self->private_impl.f_src_pixfmt = 2164308923u;
      self->private_impl.f_filter_distance = 8u;
      self->private_impl.choosy_filter_and_swizzle = (
          &wuffs_png__decoder__filter_and_swizzle_tricky);
    }
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.calculate_bytes_per_row

WUFFS_BASE__GENERATED_C_CODE
static uint64_t
wuffs_png__decoder__calculate_bytes_per_row(
    const wuffs_png__decoder* self,
    uint32_t a_width) {
  uint64_t v_bytes_per_channel = 0;

  if (self->private_impl.f_depth == 1u) {
    return ((uint64_t)(((a_width + 7u) / 8u)));
  } else if (self->private_impl.f_depth == 2u) {
    return ((uint64_t)(((a_width + 3u) / 4u)));
  } else if (self->private_impl.f_depth == 4u) {
    return ((uint64_t)(((a_width + 1u) / 2u)));
  }
  v_bytes_per_channel = ((uint64_t)(((uint8_t)(self->private_impl.f_depth >> 3u))));
  return (((uint64_t)(a_width)) * v_bytes_per_channel * ((uint64_t)(WUFFS_PNG__NUM_CHANNELS[self->private_impl.f_color_type])));
}

// -------- func png.decoder.choose_filter_implementations

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_png__decoder__choose_filter_implementations(
    wuffs_png__decoder* self) {
  if (self->private_impl.f_filter_distance == 3u) {
    self->private_impl.choosy_filter_1 = (
        &wuffs_png__decoder__filter_1_distance_3_fallback);
    self->private_impl.choosy_filter_3 = (
        &wuffs_png__decoder__filter_3_distance_3_fallback);
    self->private_impl.choosy_filter_4 = (
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
        wuffs_base__cpu_arch__have_arm_neon() ? &wuffs_png__decoder__filter_4_distance_3_arm_neon :
#endif
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
        wuffs_base__cpu_arch__have_x86_sse42() ? &wuffs_png__decoder__filter_4_distance_3_x86_sse42 :
#endif
        &wuffs_png__decoder__filter_4_distance_3_fallback);
  } else if (self->private_impl.f_filter_distance == 4u) {
    self->private_impl.choosy_filter_1 = (
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
        wuffs_base__cpu_arch__have_arm_neon() ? &wuffs_png__decoder__filter_1_distance_4_arm_neon :
#endif
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
        wuffs_base__cpu_arch__have_x86_sse42() ? &wuffs_png__decoder__filter_1_distance_4_x86_sse42 :
#endif
        &wuffs_png__decoder__filter_1_distance_4_fallback);
    self->private_impl.choosy_filter_3 = (
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
        wuffs_base__cpu_arch__have_arm_neon() ? &wuffs_png__decoder__filter_3_distance_4_arm_neon :
#endif
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
        wuffs_base__cpu_arch__have_x86_sse42() ? &wuffs_png__decoder__filter_3_distance_4_x86_sse42 :
#endif
        &wuffs_png__decoder__filter_3_distance_4_fallback);
    self->private_impl.choosy_filter_4 = (
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__ARM_NEON)
        wuffs_base__cpu_arch__have_arm_neon() ? &wuffs_png__decoder__filter_4_distance_4_arm_neon :
#endif
#if defined(WUFFS_PRIVATE_IMPL__CPU_ARCH__X86_64_V2)
        wuffs_base__cpu_arch__have_x86_sse42() ? &wuffs_png__decoder__filter_4_distance_4_x86_sse42 :
#endif
        &wuffs_png__decoder__filter_4_distance_4_fallback);
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.decode_other_chunk

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_other_chunk(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src,
    bool a_framy) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_other_chunk;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if ((self->private_impl.f_chunk_type == 1163152464u) &&  ! a_framy) {
      if (self->private_impl.f_seen_plte) {
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      } else if (self->private_impl.f_color_type == 3u) {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        status = wuffs_png__decoder__decode_plte(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
      } else if ((self->private_impl.f_color_type == 2u) || (self->private_impl.f_color_type == 6u)) {
      } else {
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      }
      self->private_impl.f_seen_plte = true;
    } else if ((self->private_impl.f_chunk_type & 32u) == 0u) {
      if (self->private_impl.f_chunk_type != 1413563465u) {
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      }
    }
    if (self->private_impl.f_chunk_type == 1716082789u) {
      if (self->private_impl.f_report_metadata_exif) {
        if (self->private_impl.f_seen_exif) {
          status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
          goto exit;
        }
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        status = wuffs_png__decoder__decode_exif(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
        self->private_impl.f_seen_exif = true;
      }
    } else if ((self->private_impl.f_chunk_type == 1951945833u) || (self->private_impl.f_chunk_type == 1951942004u) || (self->private_impl.f_chunk_type == 1951945850u)) {
      if (self->private_impl.f_report_metadata_kvp) {
        self->private_impl.f_metadata_flavor = 4u;
        self->private_impl.f_metadata_fourcc = 1263947851u;
        self->private_impl.f_metadata_x = 0u;
        self->private_impl.f_metadata_y = 0u;
        self->private_impl.f_metadata_z = 0u;
      }
    } else if ( ! a_framy) {
      if (self->private_impl.f_chunk_type == 1280598881u) {
        if (self->private_impl.f_seen_actl) {
          status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
          goto exit;
        }
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        status = wuffs_png__decoder__decode_actl(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
        self->private_impl.f_seen_actl = true;
      } else if (self->private_impl.f_chunk_type == 1297238115u) {
        if (self->private_impl.f_report_metadata_chrm) {
          if (self->private_impl.f_seen_chrm) {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          status = wuffs_png__decoder__decode_chrm(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          self->private_impl.f_seen_chrm = true;
        }
      } else if (self->private_impl.f_chunk_type == 1280598886u) {
        if (self->private_impl.f_seen_fctl) {
          status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
          goto exit;
        }
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
        status = wuffs_png__decoder__decode_fctl(self, a_src);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
        self->private_impl.f_seen_fctl = true;
      } else if (self->private_impl.f_chunk_type == 1095582055u) {
        if (self->private_impl.f_report_metadata_gama) {
          if (self->private_impl.f_seen_gama) {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
          status = wuffs_png__decoder__decode_gama(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          self->private_impl.f_seen_gama = true;
        }
      } else if (self->private_impl.f_chunk_type == 1346585449u) {
        if (self->private_impl.f_report_metadata_iccp) {
          if (self->private_impl.f_seen_iccp) {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          status = wuffs_png__decoder__decode_iccp(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          self->private_impl.f_seen_iccp = true;
        }
      } else if (self->private_impl.f_chunk_type == 1111970419u) {
        if (self->private_impl.f_report_metadata_srgb) {
          if (self->private_impl.f_seen_srgb) {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
          status = wuffs_png__decoder__decode_srgb(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          self->private_impl.f_seen_srgb = true;
        }
      } else if (self->private_impl.f_chunk_type == 1397641844u) {
        if (self->private_impl.f_seen_trns || ((self->private_impl.f_color_type == 3u) &&  ! self->private_impl.f_seen_plte)) {
          status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
          goto exit;
        } else if (self->private_impl.f_color_type > 3u) {
        } else {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
          status = wuffs_png__decoder__decode_trns(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
        }
        self->private_impl.f_seen_trns = true;
      }
    }
    if (self->private_impl.f_metadata_fourcc == 0u) {
      self->private_data.s_decode_other_chunk.scratch = self->private_impl.f_chunk_length;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
      if (self->private_data.s_decode_other_chunk.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_decode_other_chunk.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_decode_other_chunk.scratch;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_other_chunk = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_other_chunk = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_actl

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_actl(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_actl;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_chunk_length != 8u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    } else if (self->private_impl.f_interlace_pass > 0u) {
      status = wuffs_base__make_status(wuffs_png__error__unsupported_png_file);
      goto exit;
    }
    self->private_impl.f_chunk_length = 0u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_actl.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_actl.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0));
        }
      }
      self->private_impl.f_num_animation_frames_value = t_0;
    }
    if (self->private_impl.f_num_animation_frames_value == 0u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_actl.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_actl.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1));
        }
      }
      self->private_impl.f_num_animation_loops_value = t_1;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_actl = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_actl = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_chrm

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_chrm(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_u = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_chrm;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_chunk_length != 32u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    self->private_impl.f_chunk_length = 0u;
    self->private_impl.f_metadata_flavor = 5u;
    self->private_impl.f_metadata_fourcc = 1128813133u;
    self->private_impl.f_metadata_x = 0u;
    self->private_impl.f_metadata_y = 0u;
    self->private_impl.f_metadata_z = 0u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint64_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_chrm.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_chrm.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
          if (num_bits_0 == 24) {
            t_0 = ((uint64_t)(*scratch >> 32));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0));
        }
      }
      v_u = t_0;
    }
    self->private_impl.f_metadata_x |= ((16777215u & v_u) << 0u);
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint64_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_chrm.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_chrm.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
          if (num_bits_1 == 24) {
            t_1 = ((uint64_t)(*scratch >> 32));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1));
        }
      }
      v_u = t_1;
    }
    self->private_impl.f_metadata_x |= ((16777215u & v_u) << 24u);
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      uint64_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_2 = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_chrm.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_chrm.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_2);
          if (num_bits_2 == 24) {
            t_2 = ((uint64_t)(*scratch >> 32));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2));
        }
      }
      v_u = t_2;
    }
    self->private_impl.f_metadata_x |= ((uint64_t)((16777215u & v_u) << 48u));
    self->private_impl.f_metadata_y |= ((16777215u & v_u) >> 16u);
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
      uint64_t t_3;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_3 = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_chrm.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_chrm.scratch;
          uint32_t num_bits_3 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_3);
          if (num_bits_3 == 24) {
            t_3 = ((uint64_t)(*scratch >> 32));
            break;
          }
          num_bits_3 += 8u;
          *scratch |= ((uint64_t)(num_bits_3));
        }
      }
      v_u = t_3;
    }
    self->private_impl.f_metadata_y |= ((16777215u & v_u) << 8u);
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
      uint64_t t_4;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_4 = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_chrm.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_chrm.scratch;
          uint32_t num_bits_4 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_4);
          if (num_bits_4 == 24) {
            t_4 = ((uint64_t)(*scratch >> 32));
            break;
          }
          num_bits_4 += 8u;
          *scratch |= ((uint64_t)(num_bits_4));
        }
      }
      v_u = t_4;
    }
    self->private_impl.f_metadata_y |= ((16777215u & v_u) << 32u);
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
      uint64_t t_5;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_5 = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_chrm.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_chrm.scratch;
          uint32_t num_bits_5 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_5);
          if (num_bits_5 == 24) {
            t_5 = ((uint64_t)(*scratch >> 32));
            break;
          }
          num_bits_5 += 8u;
          *scratch |= ((uint64_t)(num_bits_5));
        }
      }
      v_u = t_5;
    }
    self->private_impl.f_metadata_y |= ((uint64_t)((16777215u & v_u) << 56u));
    self->private_impl.f_metadata_z |= ((16777215u & v_u) >> 8u);
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13);
      uint64_t t_6;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_6 = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_chrm.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_chrm.scratch;
          uint32_t num_bits_6 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_6);
          if (num_bits_6 == 24) {
            t_6 = ((uint64_t)(*scratch >> 32));
            break;
          }
          num_bits_6 += 8u;
          *scratch |= ((uint64_t)(num_bits_6));
        }
      }
      v_u = t_6;
    }
    self->private_impl.f_metadata_z |= ((16777215u & v_u) << 16u);
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15);
      uint64_t t_7;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_7 = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_chrm.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_chrm.scratch;
          uint32_t num_bits_7 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_7);
          if (num_bits_7 == 24) {
            t_7 = ((uint64_t)(*scratch >> 32));
            break;
          }
          num_bits_7 += 8u;
          *scratch |= ((uint64_t)(num_bits_7));
        }
      }
      v_u = t_7;
    }
    self->private_impl.f_metadata_z |= ((16777215u & v_u) << 40u);

    goto ok;
    ok:
    self->private_impl.p_decode_chrm = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_chrm = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_exif

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_exif(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  if (self->private_impl.f_chunk_length < 4u) {
    status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
    goto exit;
  }
  self->private_impl.f_metadata_flavor = 3u;
  self->private_impl.f_metadata_fourcc = 1163413830u;
  self->private_impl.f_metadata_x = 0u;
  self->private_impl.f_metadata_y = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
  self->private_impl.f_metadata_z = wuffs_base__u64__sat_add(self->private_impl.f_metadata_y, ((uint64_t)(self->private_impl.f_chunk_length)));
  self->private_impl.f_chunk_length = 0u;

  goto ok;
  ok:
  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_fctl

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_fctl(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_x0 = 0;
  uint32_t v_y0 = 0;
  uint32_t v_x1 = 0;
  uint32_t v_y1 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_fctl;
  if (coro_susp_point) {
    v_x0 = self->private_data.s_decode_fctl.v_x0;
    v_x1 = self->private_data.s_decode_fctl.v_x1;
    v_y1 = self->private_data.s_decode_fctl.v_y1;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_chunk_length != 26u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    self->private_impl.f_chunk_length = 0u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_fctl.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_fctl.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0));
        }
      }
      v_x0 = t_0;
    }
    if (v_x0 != self->private_impl.f_next_animation_seq_num) {
      status = wuffs_base__make_status(wuffs_png__error__bad_animation_sequence_number);
      goto exit;
    } else if (self->private_impl.f_next_animation_seq_num >= 4294967295u) {
      status = wuffs_base__make_status(wuffs_png__error__unsupported_png_file);
      goto exit;
    }
    self->private_impl.f_next_animation_seq_num += 1u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_fctl.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_fctl.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1));
        }
      }
      v_x1 = t_1;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      uint32_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_2 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_fctl.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_fctl.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_2);
          if (num_bits_2 == 24) {
            t_2 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2));
        }
      }
      v_y1 = t_2;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
      uint32_t t_3;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_3 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_fctl.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_fctl.scratch;
          uint32_t num_bits_3 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_3);
          if (num_bits_3 == 24) {
            t_3 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_3 += 8u;
          *scratch |= ((uint64_t)(num_bits_3));
        }
      }
      v_x0 = t_3;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
      uint32_t t_4;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_4 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_fctl.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_fctl.scratch;
          uint32_t num_bits_4 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_4);
          if (num_bits_4 == 24) {
            t_4 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_4 += 8u;
          *scratch |= ((uint64_t)(num_bits_4));
        }
      }
      v_y0 = t_4;
    }
    v_x1 += v_x0;
    v_y1 += v_y0;
    if ((v_x0 >= v_x1) ||
        (v_x0 > self->private_impl.f_width) ||
        (v_x1 > self->private_impl.f_width) ||
        (v_y0 >= v_y1) ||
        (v_y0 > self->private_impl.f_height) ||
        (v_y1 > self->private_impl.f_height)) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    self->private_impl.f_frame_rect_x0 = v_x0;
    self->private_impl.f_frame_rect_y0 = v_y0;
    self->private_impl.f_frame_rect_x1 = v_x1;
    self->private_impl.f_frame_rect_y1 = v_y1;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
      uint32_t t_5;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_5 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_fctl.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_fctl.scratch;
          uint32_t num_bits_5 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_5);
          if (num_bits_5 == 8) {
            t_5 = ((uint32_t)(*scratch >> 48));
            break;
          }
          num_bits_5 += 8u;
          *scratch |= ((uint64_t)(num_bits_5));
        }
      }
      v_x0 = t_5;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13);
      uint32_t t_6;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_6 = ((uint32_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_decode_fctl.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_fctl.scratch;
          uint32_t num_bits_6 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_6);
          if (num_bits_6 == 8) {
            t_6 = ((uint32_t)(*scratch >> 48));
            break;
          }
          num_bits_6 += 8u;
          *scratch |= ((uint64_t)(num_bits_6));
        }
      }
      v_x1 = t_6;
    }
    if (v_x1 <= 0u) {
      self->private_impl.f_frame_duration = (((uint64_t)(v_x0)) * 7056000u);
    } else {
      self->private_impl.f_frame_duration = ((((uint64_t)(v_x0)) * 705600000u) / ((uint64_t)(v_x1)));
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint32_t t_7 = *iop_a_src++;
      v_x0 = t_7;
    }
    if (v_x0 == 0u) {
      self->private_impl.f_frame_disposal = 0u;
    } else if (v_x0 == 1u) {
      self->private_impl.f_frame_disposal = 1u;
    } else if (v_x0 == 2u) {
      self->private_impl.f_frame_disposal = 2u;
    } else {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint32_t t_8 = *iop_a_src++;
      v_x0 = t_8;
    }
    if (v_x0 == 0u) {
      self->private_impl.f_frame_overwrite_instead_of_blend = true;
    } else if (v_x0 == 1u) {
      self->private_impl.f_frame_overwrite_instead_of_blend = false;
    } else {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    if (self->private_impl.f_num_decoded_frame_configs_value == 0u) {
      self->private_impl.f_first_rect_x0 = self->private_impl.f_frame_rect_x0;
      self->private_impl.f_first_rect_y0 = self->private_impl.f_frame_rect_y0;
      self->private_impl.f_first_rect_x1 = self->private_impl.f_frame_rect_x1;
      self->private_impl.f_first_rect_y1 = self->private_impl.f_frame_rect_y1;
      self->private_impl.f_first_duration = self->private_impl.f_frame_duration;
      self->private_impl.f_first_disposal = self->private_impl.f_frame_disposal;
      self->private_impl.f_first_overwrite_instead_of_blend = self->private_impl.f_frame_overwrite_instead_of_blend;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_fctl = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_fctl = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_fctl.v_x0 = v_x0;
  self->private_data.s_decode_fctl.v_x1 = v_x1;
  self->private_data.s_decode_fctl.v_y1 = v_y1;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_gama

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_gama(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_gama;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_chunk_length != 4u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    self->private_impl.f_chunk_length = 0u;
    self->private_impl.f_metadata_flavor = 5u;
    self->private_impl.f_metadata_fourcc = 1195461953u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint64_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = ((uint64_t)(wuffs_base__peek_u32be__no_bounds_check(iop_a_src)));
        iop_a_src += 4;
      } else {
        self->private_data.s_decode_gama.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_decode_gama.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
          if (num_bits_0 == 24) {
            t_0 = ((uint64_t)(*scratch >> 32));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0));
        }
      }
      self->private_impl.f_metadata_x = t_0;
    }
    self->private_impl.f_metadata_y = 0u;
    self->private_impl.f_metadata_z = 0u;

    goto ok;
    ok:
    self->private_impl.p_decode_gama = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_gama = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_iccp

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_iccp(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_iccp;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      if (self->private_impl.f_chunk_length <= 0u) {
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      }
      self->private_impl.f_chunk_length -= 1u;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      if (v_c8 == 0u) {
        break;
      }
    }
    if (self->private_impl.f_chunk_length <= 0u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    self->private_impl.f_chunk_length -= 1u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_1 = *iop_a_src++;
      v_c8 = t_1;
    }
    if (v_c8 != 0u) {
      status = wuffs_base__make_status(wuffs_png__error__unsupported_png_compression_method);
      goto exit;
    }
    self->private_impl.f_metadata_is_zlib_compressed = true;
    self->private_impl.f_metadata_flavor = 4u;
    self->private_impl.f_metadata_fourcc = 1229144912u;
    self->private_impl.f_metadata_x = 0u;
    self->private_impl.f_metadata_y = 0u;
    self->private_impl.f_metadata_z = 0u;

    goto ok;
    ok:
    self->private_impl.p_decode_iccp = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_iccp = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_plte

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_plte(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_num_entries = 0;
  uint32_t v_i = 0;
  uint32_t v_argb = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_plte;
  if (coro_susp_point) {
    v_num_entries = self->private_data.s_decode_plte.v_num_entries;
    v_i = self->private_data.s_decode_plte.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if ((self->private_impl.f_chunk_length > 768u) || ((self->private_impl.f_chunk_length % 3u) != 0u)) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    v_num_entries = (((uint32_t)(self->private_impl.f_chunk_length)) / 3u);
    self->private_impl.f_chunk_length = 0u;
    while (v_i < v_num_entries) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        uint32_t t_0;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) {
          t_0 = ((uint32_t)(wuffs_base__peek_u24be__no_bounds_check(iop_a_src)));
          iop_a_src += 3;
        } else {
          self->private_data.s_decode_plte.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_decode_plte.scratch;
            uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
            *scratch >>= 8;
            *scratch <<= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
            if (num_bits_0 == 16) {
              t_0 = ((uint32_t)(*scratch >> 40));
              break;
            }
            num_bits_0 += 8u;
            *scratch |= ((uint64_t)(num_bits_0));
          }
        }
        v_argb = t_0;
      }
      v_argb |= 4278190080u;
      self->private_data.f_src_palette[((4u * v_i) + 0u)] = ((uint8_t)((v_argb >> 0u)));
      self->private_data.f_src_palette[((4u * v_i) + 1u)] = ((uint8_t)((v_argb >> 8u)));
      self->private_data.f_src_palette[((4u * v_i) + 2u)] = ((uint8_t)((v_argb >> 16u)));
      self->private_data.f_src_palette[((4u * v_i) + 3u)] = ((uint8_t)((v_argb >> 24u)));
      v_i += 1u;
    }
    while (v_i < 256u) {
      self->private_data.f_src_palette[((4u * v_i) + 0u)] = 0u;
      self->private_data.f_src_palette[((4u * v_i) + 1u)] = 0u;
      self->private_data.f_src_palette[((4u * v_i) + 2u)] = 0u;
      self->private_data.f_src_palette[((4u * v_i) + 3u)] = 255u;
      v_i += 1u;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_plte = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_plte = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_plte.v_num_entries = v_num_entries;
  self->private_data.s_decode_plte.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_srgb

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_srgb(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_srgb;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_chunk_length != 1u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    self->private_impl.f_chunk_length = 0u;
    self->private_impl.f_metadata_flavor = 5u;
    self->private_impl.f_metadata_fourcc = 1397901122u;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint64_t t_0 = *iop_a_src++;
      self->private_impl.f_metadata_x = t_0;
    }
    self->private_impl.f_metadata_y = 0u;
    self->private_impl.f_metadata_z = 0u;

    goto ok;
    ok:
    self->private_impl.p_decode_srgb = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_srgb = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_trns

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_trns(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_i = 0;
  uint32_t v_n = 0;
  uint64_t v_u = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_trns;
  if (coro_susp_point) {
    v_i = self->private_data.s_decode_trns.v_i;
    v_n = self->private_data.s_decode_trns.v_n;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_color_type == 0u) {
      self->private_impl.choosy_filter_and_swizzle = (
          &wuffs_png__decoder__filter_and_swizzle_tricky);
      if (self->private_impl.f_depth <= 8u) {
        self->private_impl.f_dst_pixfmt = 2164295816u;
        self->private_impl.f_src_pixfmt = 2164295816u;
      } else {
        self->private_impl.f_dst_pixfmt = 2164308923u;
        self->private_impl.f_src_pixfmt = 2164308923u;
      }
      if (self->private_impl.f_chunk_length != 2u) {
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      }
      self->private_impl.f_chunk_length = 0u;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        uint64_t t_0;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_0 = ((uint64_t)(wuffs_base__peek_u16be__no_bounds_check(iop_a_src)));
          iop_a_src += 2;
        } else {
          self->private_data.s_decode_trns.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_decode_trns.scratch;
            uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
            *scratch >>= 8;
            *scratch <<= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
            if (num_bits_0 == 8) {
              t_0 = ((uint64_t)(*scratch >> 48));
              break;
            }
            num_bits_0 += 8u;
            *scratch |= ((uint64_t)(num_bits_0));
          }
        }
        v_u = t_0;
      }
      if (self->private_impl.f_depth <= 1u) {
        self->private_impl.f_remap_transparency = (((v_u & 1u) * 16777215u) | 4278190080u);
      } else if (self->private_impl.f_depth <= 2u) {
        self->private_impl.f_remap_transparency = (((v_u & 3u) * 5592405u) | 4278190080u);
      } else if (self->private_impl.f_depth <= 4u) {
        self->private_impl.f_remap_transparency = (((v_u & 15u) * 1118481u) | 4278190080u);
      } else if (self->private_impl.f_depth <= 8u) {
        self->private_impl.f_remap_transparency = (((v_u & 255u) * 65793u) | 4278190080u);
      } else {
        self->private_impl.f_remap_transparency = ((v_u * 4295032833u) | 18446462598732840960u);
      }
    } else if (self->private_impl.f_color_type == 2u) {
      self->private_impl.choosy_filter_and_swizzle = (
          &wuffs_png__decoder__filter_and_swizzle_tricky);
      if (self->private_impl.f_depth <= 8u) {
        self->private_impl.f_dst_pixfmt = 2164295816u;
        self->private_impl.f_src_pixfmt = 2164295816u;
      } else {
        self->private_impl.f_dst_pixfmt = 2164308923u;
        self->private_impl.f_src_pixfmt = 2164308923u;
      }
      if (self->private_impl.f_chunk_length != 6u) {
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      }
      self->private_impl.f_chunk_length = 0u;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        uint64_t t_1;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 6)) {
          t_1 = ((uint64_t)(wuffs_base__peek_u48be__no_bounds_check(iop_a_src)));
          iop_a_src += 6;
        } else {
          self->private_data.s_decode_trns.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_decode_trns.scratch;
            uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
            *scratch >>= 8;
            *scratch <<= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
            if (num_bits_1 == 40) {
              t_1 = ((uint64_t)(*scratch >> 16));
              break;
            }
            num_bits_1 += 8u;
            *scratch |= ((uint64_t)(num_bits_1));
          }
        }
        v_u = t_1;
      }
      if (self->private_impl.f_depth <= 8u) {
        self->private_impl.f_remap_transparency = ((255u & (v_u >> 0u)) |
            (65280u & (v_u >> 8u)) |
            (16711680u & (v_u >> 16u)) |
            4278190080u);
      } else {
        self->private_impl.f_remap_transparency = (v_u | 18446462598732840960u);
      }
    } else if (self->private_impl.f_color_type == 3u) {
      self->private_impl.f_dst_pixfmt = 2164523016u;
      self->private_impl.f_src_pixfmt = 2164523016u;
      if (self->private_impl.f_chunk_length > 256u) {
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      }
      v_n = ((uint32_t)(self->private_impl.f_chunk_length));
      self->private_impl.f_chunk_length = 0u;
      while (v_i < v_n) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          self->private_data.f_src_palette[((4u * v_i) + 3u)] = t_2;
        }
        v_i += 1u;
      }
    } else {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_trns = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_trns = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_trns.v_i = v_i;
  self->private_data.s_decode_trns.v_n = v_n;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__decode_frame_config(
    wuffs_png__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_png__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_png__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func png.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__do_decode_frame_config(
    wuffs_png__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_checksum_have = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (((uint8_t)(self->private_impl.f_call_sequence & 16u)) != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    } else if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_png__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (self->private_impl.f_frame_config_io_position != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      status = wuffs_png__decoder__skip_frame(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (self->private_impl.f_metadata_fourcc != 0u) {
      self->private_impl.f_call_sequence = 48u;
      status = wuffs_base__make_status(wuffs_base__note__metadata_reported);
      goto ok;
    }
    if (self->private_impl.f_num_decoded_frame_configs_value == 0u) {
      self->private_impl.f_frame_rect_x0 = self->private_impl.f_first_rect_x0;
      self->private_impl.f_frame_rect_y0 = self->private_impl.f_first_rect_y0;
      self->private_impl.f_frame_rect_x1 = self->private_impl.f_first_rect_x1;
      self->private_impl.f_frame_rect_y1 = self->private_impl.f_first_rect_y1;
      self->private_impl.f_frame_config_io_position = self->private_impl.f_first_config_io_position;
      self->private_impl.f_frame_duration = self->private_impl.f_first_duration;
      self->private_impl.f_frame_disposal = self->private_impl.f_first_disposal;
      self->private_impl.f_frame_overwrite_instead_of_blend = self->private_impl.f_first_overwrite_instead_of_blend;
    } else {
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          uint32_t t_0;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_0 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_do_decode_frame_config.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_decode_frame_config.scratch;
              uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
              if (num_bits_0 == 24) {
                t_0 = ((uint32_t)(*scratch >> 32));
                break;
              }
              num_bits_0 += 8u;
              *scratch |= ((uint64_t)(num_bits_0));
            }
          }
          self->private_impl.f_chunk_length = t_0;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
          uint32_t t_1;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_1 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_do_decode_frame_config.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_decode_frame_config.scratch;
              uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
              *scratch <<= 8;
              *scratch >>= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
              if (num_bits_1 == 24) {
                t_1 = ((uint32_t)(*scratch));
                break;
              }
              num_bits_1 += 8u;
              *scratch |= ((uint64_t)(num_bits_1)) << 56;
            }
          }
          self->private_impl.f_chunk_type = t_1;
        }
        if (self->private_impl.f_chunk_type == 1145980233u) {
          if (self->private_impl.f_chunk_length != 0u) {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
            uint32_t t_2;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_2 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_do_decode_frame_config.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_decode_frame_config.scratch;
                uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
                if (num_bits_2 == 24) {
                  t_2 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_2 += 8u;
                *scratch |= ((uint64_t)(num_bits_2)) << 56;
              }
            }
            v_checksum_have = t_2;
          }
          if ( ! self->private_impl.f_ignore_checksum && (v_checksum_have != 2187346606u)) {
            status = wuffs_base__make_status(wuffs_png__error__bad_checksum);
            goto exit;
          }
          self->private_impl.f_call_sequence = 96u;
          status = wuffs_base__make_status(wuffs_base__note__end_of_data);
          goto ok;
        } else if (self->private_impl.f_chunk_type == 1413571686u) {
          status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
          goto exit;
        } else if (self->private_impl.f_chunk_type == 1280598886u) {
          self->private_impl.f_frame_config_io_position = ((uint64_t)(wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src))) - 8u));
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
          status = wuffs_png__decoder__decode_fctl(self, a_src);
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
          if (status.repr) {
            goto suspend;
          }
          self->private_data.s_do_decode_frame_config.scratch = 4u;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
          if (self->private_data.s_do_decode_frame_config.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
            self->private_data.s_do_decode_frame_config.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
            iop_a_src = io2_a_src;
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          iop_a_src += self->private_data.s_do_decode_frame_config.scratch;
          break;
        }
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
        status = wuffs_png__decoder__decode_other_chunk(self, a_src, true);
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
        if (status.repr) {
          goto suspend;
        }
        if (self->private_impl.f_metadata_fourcc != 0u) {
          self->private_impl.f_call_sequence = 48u;
          status = wuffs_base__make_status(wuffs_base__note__metadata_reported);
          goto ok;
        }
        self->private_data.s_do_decode_frame_config.scratch = 4u;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
        if (self->private_data.s_do_decode_frame_config.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
          self->private_data.s_do_decode_frame_config.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
          iop_a_src = io2_a_src;
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        iop_a_src += self->private_data.s_do_decode_frame_config.scratch;
        self->private_impl.f_chunk_length = 0u;
      }
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          self->private_impl.f_frame_rect_x0,
          self->private_impl.f_frame_rect_y0,
          self->private_impl.f_frame_rect_x1,
          self->private_impl.f_frame_rect_y1),
          ((wuffs_base__flicks)(self->private_impl.f_frame_duration)),
          ((uint64_t)(self->private_impl.f_num_decoded_frame_configs_value)),
          self->private_impl.f_frame_config_io_position,
          self->private_impl.f_frame_disposal,
          ((self->private_impl.f_color_type <= 3u) &&  ! self->private_impl.f_seen_trns),
          self->private_impl.f_frame_overwrite_instead_of_blend,
          0u);
    }
    wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_num_decoded_frame_configs_value, 1u);
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.skip_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__skip_frame(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_seq_num = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_skip_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_chunk_type_array[0u] = 0u;
    self->private_impl.f_chunk_type_array[1u] = 0u;
    self->private_impl.f_chunk_type_array[2u] = 0u;
    self->private_impl.f_chunk_type_array[3u] = 0u;
    while (true) {
      if (((uint64_t)(io2_a_src - iop_a_src)) < 8u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
        continue;
      }
      self->private_impl.f_chunk_length = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
      self->private_impl.f_chunk_type = ((uint32_t)((wuffs_base__peek_u64le__no_bounds_check(iop_a_src) >> 32u)));
      if (self->private_impl.f_chunk_type == 1413563465u) {
        if (self->private_impl.f_chunk_type_array[0u] == 102u) {
          status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
          goto exit;
        }
        self->private_impl.f_chunk_type_array[0u] = 73u;
        self->private_impl.f_chunk_type_array[1u] = 68u;
        self->private_impl.f_chunk_type_array[2u] = 65u;
        self->private_impl.f_chunk_type_array[3u] = 84u;
      } else if (self->private_impl.f_chunk_type == 1413571686u) {
        if (self->private_impl.f_chunk_type_array[0u] == 73u) {
          status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
          goto exit;
        }
        self->private_impl.f_chunk_type_array[0u] = 102u;
        self->private_impl.f_chunk_type_array[1u] = 100u;
        self->private_impl.f_chunk_type_array[2u] = 65u;
        self->private_impl.f_chunk_type_array[3u] = 84u;
        if (self->private_impl.f_chunk_length < 4u) {
          status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
          goto exit;
        }
        self->private_impl.f_chunk_length -= 4u;
        iop_a_src += 8u;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          uint32_t t_0;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_0 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_skip_frame.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_skip_frame.scratch;
              uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
              if (num_bits_0 == 24) {
                t_0 = ((uint32_t)(*scratch >> 32));
                break;
              }
              num_bits_0 += 8u;
              *scratch |= ((uint64_t)(num_bits_0));
            }
          }
          v_seq_num = t_0;
        }
        if (v_seq_num != self->private_impl.f_next_animation_seq_num) {
          status = wuffs_base__make_status(wuffs_png__error__bad_animation_sequence_number);
          goto exit;
        } else if (self->private_impl.f_next_animation_seq_num >= 4294967295u) {
          status = wuffs_base__make_status(wuffs_png__error__unsupported_png_file);
          goto exit;
        }
        self->private_impl.f_next_animation_seq_num += 1u;
        self->private_data.s_skip_frame.scratch = (((uint64_t)(self->private_impl.f_chunk_length)) + 4u);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        if (self->private_data.s_skip_frame.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
          self->private_data.s_skip_frame.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
          iop_a_src = io2_a_src;
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        iop_a_src += self->private_data.s_skip_frame.scratch;
        self->private_impl.f_chunk_length = 0u;
        continue;
      } else if (self->private_impl.f_chunk_type_array[0u] != 0u) {
        break;
      } else if (self->private_impl.f_chunk_type == 1280598886u) {
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      }
      self->private_data.s_skip_frame.scratch = (((uint64_t)(self->private_impl.f_chunk_length)) + 12u);
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      if (self->private_data.s_skip_frame.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_skip_frame.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_skip_frame.scratch;
      self->private_impl.f_chunk_length = 0u;
    }
    wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_num_decoded_frames_value, 1u);
    self->private_impl.f_call_sequence = 32u;

    ok:
    self->private_impl.p_skip_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_skip_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__decode_frame(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_png__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_png__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func png.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__do_decode_frame(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_seq_num = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint32_t v_pass_width = 0;
  uint32_t v_pass_height = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (((uint8_t)(self->private_impl.f_call_sequence & 16u)) != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    } else if (self->private_impl.f_call_sequence >= 96u) {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else if (self->private_impl.f_call_sequence != 64u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_png__decoder__do_decode_frame_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    }
    while (true) {
      if (((uint64_t)(io2_a_src - iop_a_src)) < 8u) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
        continue;
      }
      self->private_impl.f_chunk_length = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
      self->private_impl.f_chunk_type = ((uint32_t)((wuffs_base__peek_u64le__no_bounds_check(iop_a_src) >> 32u)));
      if (self->private_impl.f_chunk_type == 1413563465u) {
        self->private_impl.f_chunk_type_array[0u] = 73u;
        self->private_impl.f_chunk_type_array[1u] = 68u;
        self->private_impl.f_chunk_type_array[2u] = 65u;
        self->private_impl.f_chunk_type_array[3u] = 84u;
        iop_a_src += 8u;
        if ( ! self->private_impl.f_ignore_checksum) {
          wuffs_private_impl__ignore_status(wuffs_crc32__ieee_hasher__initialize(&self->private_data.f_crc32,
              sizeof (wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
          wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_base__make_slice_u8(self->private_impl.f_chunk_type_array, 4));
        }
        break;
      } else if (self->private_impl.f_chunk_type == 1413571686u) {
        self->private_impl.f_chunk_type_array[0u] = 102u;
        self->private_impl.f_chunk_type_array[1u] = 100u;
        self->private_impl.f_chunk_type_array[2u] = 65u;
        self->private_impl.f_chunk_type_array[3u] = 84u;
        if (self->private_impl.f_chunk_length < 4u) {
          status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
          goto exit;
        }
        self->private_impl.f_chunk_length -= 4u;
        iop_a_src += 8u;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          uint32_t t_0;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_0 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_do_decode_frame.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_decode_frame.scratch;
              uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
              if (num_bits_0 == 24) {
                t_0 = ((uint32_t)(*scratch >> 32));
                break;
              }
              num_bits_0 += 8u;
              *scratch |= ((uint64_t)(num_bits_0));
            }
          }
          v_seq_num = t_0;
        }
        if (v_seq_num != self->private_impl.f_next_animation_seq_num) {
          status = wuffs_base__make_status(wuffs_png__error__bad_animation_sequence_number);
          goto exit;
        } else if (self->private_impl.f_next_animation_seq_num >= 4294967295u) {
          status = wuffs_base__make_status(wuffs_png__error__unsupported_png_file);
          goto exit;
        }
        self->private_impl.f_next_animation_seq_num += 1u;
        break;
      } else if (self->private_impl.f_chunk_type == 1280598886u) {
        status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
        goto exit;
      }
      self->private_data.s_do_decode_frame.scratch = (((uint64_t)(self->private_impl.f_chunk_length)) + 12u);
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      if (self->private_data.s_do_decode_frame.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
        self->private_data.s_do_decode_frame.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
        iop_a_src = io2_a_src;
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      iop_a_src += self->private_data.s_do_decode_frame.scratch;
      self->private_impl.f_chunk_length = 0u;
    }
    if (self->private_impl.f_zlib_is_dirty) {
      wuffs_private_impl__ignore_status(wuffs_zlib__decoder__initialize(&self->private_data.f_zlib,
          sizeof (wuffs_zlib__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
      if (self->private_impl.f_ignore_checksum) {
        wuffs_zlib__decoder__set_quirk(&self->private_data.f_zlib, 1u, 1u);
      }
    }
    self->private_impl.f_zlib_is_dirty = true;
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024)),
        wuffs_base__utility__make_pixel_format(self->private_impl.f_src_pixfmt),
        wuffs_base__make_slice_u8(self->private_data.f_src_palette, 1024),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    self->private_impl.f_workbuf_hist_pos_base = 0u;
    while (true) {
      if (self->private_impl.f_chunk_type_array[0u] == 73u) {
        v_pass_width = (16777215u & ((((uint32_t)(WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][1u])) + self->private_impl.f_width) >> WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][0u]));
        v_pass_height = (16777215u & ((((uint32_t)(WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][4u])) + self->private_impl.f_height) >> WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][3u]));
      } else {
        v_pass_width = (16777215u & ((uint32_t)(self->private_impl.f_frame_rect_x1 - self->private_impl.f_frame_rect_x0)));
        v_pass_height = (16777215u & ((uint32_t)(self->private_impl.f_frame_rect_y1 - self->private_impl.f_frame_rect_y0)));
      }
      if ((v_pass_width > 0u) && (v_pass_height > 0u)) {
        self->private_impl.f_pass_bytes_per_row = wuffs_png__decoder__calculate_bytes_per_row(self, v_pass_width);
        self->private_impl.f_pass_workbuf_length = (((uint64_t)(v_pass_height)) * (1u + self->private_impl.f_pass_bytes_per_row));
        while (true) {
          {
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            wuffs_base__status t_1 = wuffs_png__decoder__decode_pass(self, a_src, a_workbuf);
            v_status = t_1;
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
          }
          if (wuffs_base__status__is_ok(&v_status)) {
            break;
          } else if (wuffs_base__status__is_error(&v_status) || ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed))) {
            if (self->private_impl.f_workbuf_wi <= ((uint64_t)(a_workbuf.len))) {
              wuffs_png__decoder__filter_and_swizzle(self, a_dst, wuffs_base__slice_u8__subslice_j(a_workbuf, self->private_impl.f_workbuf_wi));
            }
            if (v_status.repr == wuffs_base__suspension__short_read) {
              status = wuffs_base__make_status(wuffs_png__error__truncated_input);
              goto exit;
            }
          }
          status = v_status;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(6);
        }
        v_status = wuffs_png__decoder__filter_and_swizzle(self, a_dst, a_workbuf);
        if ( ! wuffs_base__status__is_ok(&v_status)) {
          status = v_status;
          if (wuffs_base__status__is_error(&status)) {
            goto exit;
          } else if (wuffs_base__status__is_suspension(&status)) {
            status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
            goto exit;
          }
          goto ok;
        }
        self->private_impl.f_workbuf_hist_pos_base += self->private_impl.f_pass_workbuf_length;
      }
      if ((self->private_impl.f_interlace_pass == 0u) || (self->private_impl.f_interlace_pass >= 7u)) {
        break;
      }
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
      self->private_impl.f_interlace_pass += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    }
    wuffs_private_impl__u32__sat_add_indirect(&self->private_impl.f_num_decoded_frames_value, 1u);
    self->private_impl.f_call_sequence = 32u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.decode_pass

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__decode_pass(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__io_buffer u_w = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_w = &u_w;
  uint8_t* iop_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io0_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint64_t v_w_mark = 0;
  uint64_t v_r_mark = 0;
  wuffs_base__status v_zlib_status = wuffs_base__make_status(NULL);
  uint32_t v_checksum_have = 0;
  uint32_t v_checksum_want = 0;
  uint32_t v_seq_num = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_pass;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    self->private_impl.f_workbuf_wi = 0u;
    while (true) {
      if ((self->private_impl.f_workbuf_wi > self->private_impl.f_pass_workbuf_length) || (self->private_impl.f_pass_workbuf_length > ((uint64_t)(a_workbuf.len)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
        goto exit;
      }
      {
        wuffs_base__io_buffer* o_0_v_w = v_w;
        uint8_t* o_0_iop_v_w = iop_v_w;
        uint8_t* o_0_io0_v_w = io0_v_w;
        uint8_t* o_0_io1_v_w = io1_v_w;
        uint8_t* o_0_io2_v_w = io2_v_w;
        v_w = wuffs_private_impl__io_writer__set(
            &u_w,
            &iop_v_w,
            &io0_v_w,
            &io1_v_w,
            &io2_v_w,
            wuffs_base__slice_u8__subslice_ij(a_workbuf,
            self->private_impl.f_workbuf_wi,
            self->private_impl.f_pass_workbuf_length),
            ((uint64_t)(self->private_impl.f_workbuf_hist_pos_base + self->private_impl.f_workbuf_wi)));
        {
          const bool o_1_closed_a_src = a_src->meta.closed;
          const uint8_t* o_1_io2_a_src = io2_a_src;
          wuffs_private_impl__io_reader__limit(&io2_a_src, iop_a_src,
              ((uint64_t)(self->private_impl.f_chunk_length)));
          if (a_src) {
            size_t n = ((size_t)(io2_a_src - a_src->data.ptr));
            a_src->meta.closed = a_src->meta.closed && (a_src->meta.wi <= n);
            a_src->meta.wi = n;
          }
          v_w_mark = ((uint64_t)(iop_v_w - io0_v_w));
          v_r_mark = ((uint64_t)(iop_a_src - io0_a_src));
          {
            u_w.meta.wi = ((size_t)(iop_v_w - u_w.data.ptr));
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            wuffs_base__status t_0 = wuffs_zlib__decoder__transform_io(&self->private_data.f_zlib, v_w, a_src, wuffs_base__utility__empty_slice_u8());
            v_zlib_status = t_0;
            iop_v_w = u_w.data.ptr + u_w.meta.wi;
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
          }
          if ( ! self->private_impl.f_ignore_checksum) {
            wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_private_impl__io__since(v_r_mark, ((uint64_t)(iop_a_src - io0_a_src)), io0_a_src));
          }
          wuffs_private_impl__u32__sat_sub_indirect(&self->private_impl.f_chunk_length, ((uint32_t)(wuffs_private_impl__io__count_since(v_r_mark, ((uint64_t)(iop_a_src - io0_a_src))))));
          wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_workbuf_wi, wuffs_private_impl__io__count_since(v_w_mark, ((uint64_t)(iop_v_w - io0_v_w))));
          io2_a_src = o_1_io2_a_src;
          if (a_src) {
            a_src->meta.closed = o_1_closed_a_src;
            a_src->meta.wi = ((size_t)(io2_a_src - a_src->data.ptr));
          }
        }
        v_w = o_0_v_w;
        iop_v_w = o_0_iop_v_w;
        io0_v_w = o_0_io0_v_w;
        io1_v_w = o_0_io1_v_w;
        io2_v_w = o_0_io2_v_w;
      }
      if (wuffs_base__status__is_ok(&v_zlib_status)) {
        if (self->private_impl.f_chunk_length > 0u) {
          status = wuffs_base__make_status(wuffs_base__error__too_much_data);
          goto exit;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
          uint32_t t_1;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_1 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_decode_pass.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_decode_pass.scratch;
              uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
              if (num_bits_1 == 24) {
                t_1 = ((uint32_t)(*scratch >> 32));
                break;
              }
              num_bits_1 += 8u;
              *scratch |= ((uint64_t)(num_bits_1));
            }
          }
          v_checksum_want = t_1;
        }
        if ( ! self->private_impl.f_ignore_checksum && (self->private_impl.f_chunk_type_array[0u] == 73u)) {
          v_checksum_have = wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_base__utility__empty_slice_u8());
          if (v_checksum_have != v_checksum_want) {
            status = wuffs_base__make_status(wuffs_png__error__bad_checksum);
            goto exit;
          }
        }
        break;
      } else if (v_zlib_status.repr == wuffs_base__suspension__short_write) {
        if ((1u <= self->private_impl.f_interlace_pass) && (self->private_impl.f_interlace_pass <= 6u)) {
          break;
        }
        status = wuffs_base__make_status(wuffs_base__error__too_much_data);
        goto exit;
      } else if (v_zlib_status.repr != wuffs_base__suspension__short_read) {
        status = v_zlib_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      } else if (self->private_impl.f_chunk_length == 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          uint32_t t_2;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_2 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_decode_pass.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_decode_pass.scratch;
              uint32_t num_bits_2 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_2);
              if (num_bits_2 == 24) {
                t_2 = ((uint32_t)(*scratch >> 32));
                break;
              }
              num_bits_2 += 8u;
              *scratch |= ((uint64_t)(num_bits_2));
            }
          }
          v_checksum_want = t_2;
        }
        if ( ! self->private_impl.f_ignore_checksum && (self->private_impl.f_chunk_type_array[0u] == 73u)) {
          v_checksum_have = wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_base__utility__empty_slice_u8());
          if (v_checksum_have != v_checksum_want) {
            status = wuffs_base__make_status(wuffs_png__error__bad_checksum);
            goto exit;
          }
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
          uint32_t t_3;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_3 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_decode_pass.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_decode_pass.scratch;
              uint32_t num_bits_3 = ((uint32_t)(*scratch & 0xFFu));
              *scratch >>= 8;
              *scratch <<= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_3);
              if (num_bits_3 == 24) {
                t_3 = ((uint32_t)(*scratch >> 32));
                break;
              }
              num_bits_3 += 8u;
              *scratch |= ((uint64_t)(num_bits_3));
            }
          }
          self->private_impl.f_chunk_length = t_3;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          uint32_t t_4;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_4 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_decode_pass.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_decode_pass.scratch;
              uint32_t num_bits_4 = ((uint32_t)(*scratch >> 56));
              *scratch <<= 8;
              *scratch >>= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4;
              if (num_bits_4 == 24) {
                t_4 = ((uint32_t)(*scratch));
                break;
              }
              num_bits_4 += 8u;
              *scratch |= ((uint64_t)(num_bits_4)) << 56;
            }
          }
          self->private_impl.f_chunk_type = t_4;
        }
        if (self->private_impl.f_chunk_type_array[0u] == 73u) {
          if (self->private_impl.f_chunk_type != 1413563465u) {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          if ( ! self->private_impl.f_ignore_checksum) {
            wuffs_private_impl__ignore_status(wuffs_crc32__ieee_hasher__initialize(&self->private_data.f_crc32,
                sizeof (wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
            wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_base__make_slice_u8(self->private_impl.f_chunk_type_array, 4));
          }
        } else {
          if ((self->private_impl.f_chunk_type != 1413571686u) || (self->private_impl.f_chunk_length < 4u)) {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          self->private_impl.f_chunk_length -= 4u;
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
            uint32_t t_5;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_5 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_decode_pass.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_decode_pass.scratch;
                uint32_t num_bits_5 = ((uint32_t)(*scratch & 0xFFu));
                *scratch >>= 8;
                *scratch <<= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_5);
                if (num_bits_5 == 24) {
                  t_5 = ((uint32_t)(*scratch >> 32));
                  break;
                }
                num_bits_5 += 8u;
                *scratch |= ((uint64_t)(num_bits_5));
              }
            }
            v_seq_num = t_5;
          }
          if (v_seq_num != self->private_impl.f_next_animation_seq_num) {
            status = wuffs_base__make_status(wuffs_png__error__bad_animation_sequence_number);
            goto exit;
          } else if (self->private_impl.f_next_animation_seq_num >= 4294967295u) {
            status = wuffs_base__make_status(wuffs_png__error__unsupported_png_file);
            goto exit;
          }
          self->private_impl.f_next_animation_seq_num += 1u;
        }
        continue;
      } else if (((uint64_t)(io2_a_src - iop_a_src)) > 0u) {
        status = wuffs_base__make_status(wuffs_png__error__internal_error_zlib_decoder_did_not_exhaust_its_input);
        goto exit;
      }
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(11);
    }
    if (self->private_impl.f_workbuf_wi != self->private_impl.f_pass_workbuf_length) {
      status = wuffs_base__make_status(wuffs_base__error__not_enough_data);
      goto exit;
    } else if (0u < ((uint64_t)(a_workbuf.len))) {
      if (a_workbuf.ptr[0u] == 4u) {
        a_workbuf.ptr[0u] = 1u;
      }
    }

    ok:
    self->private_impl.p_decode_pass = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_pass = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_png__decoder__frame_dirty_rect(
    const wuffs_png__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      self->private_impl.f_frame_rect_x0,
      self->private_impl.f_frame_rect_y0,
      self->private_impl.f_frame_rect_x1,
      self->private_impl.f_frame_rect_y1);
}

// -------- func png.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_png__decoder__num_animation_loops(
    const wuffs_png__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return self->private_impl.f_num_animation_loops_value;
}

// -------- func png.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_png__decoder__num_decoded_frame_configs(
    const wuffs_png__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return ((uint64_t)(self->private_impl.f_num_decoded_frame_configs_value));
}

// -------- func png.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_png__decoder__num_decoded_frames(
    const wuffs_png__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return ((uint64_t)(self->private_impl.f_num_decoded_frames_value));
}

// -------- func png.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__restart_frame(
    wuffs_png__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  } else if ((a_index >= ((uint64_t)(self->private_impl.f_num_animation_frames_value))) || ((a_index == 0u) && (a_io_position != self->private_impl.f_first_config_io_position))) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  if (self->private_impl.f_interlace_pass >= 1u) {
    self->private_impl.f_interlace_pass = 1u;
  }
  self->private_impl.f_frame_config_io_position = a_io_position;
  self->private_impl.f_num_decoded_frame_configs_value = ((uint32_t)(a_index));
  self->private_impl.f_num_decoded_frames_value = self->private_impl.f_num_decoded_frame_configs_value;
  return wuffs_base__make_status(NULL);
}

// -------- func png.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_png__decoder__set_report_metadata(
    wuffs_png__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  if (a_fourcc == 1128813133u) {
    self->private_impl.f_report_metadata_chrm = a_report;
  } else if (a_fourcc == 1163413830u) {
    self->private_impl.f_report_metadata_exif = a_report;
  } else if (a_fourcc == 1195461953u) {
    self->private_impl.f_report_metadata_gama = a_report;
  } else if (a_fourcc == 1229144912u) {
    self->private_impl.f_report_metadata_iccp = a_report;
  } else if (a_fourcc == 1263947808u) {
    self->private_impl.f_report_metadata_kvp = a_report;
  } else if (a_fourcc == 1397901122u) {
    self->private_impl.f_report_metadata_srgb = a_report;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func png.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_png__decoder__tell_me_more(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_tell_me_more;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_png__decoder__do_tell_me_more(self, a_dst, a_minfo, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_png__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_tell_me_more = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_tell_me_more = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 4 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func png.decoder.do_tell_me_more

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__do_tell_me_more(
    wuffs_png__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint16_t v_c16 = 0;
  wuffs_base__io_buffer u_w = wuffs_base__empty_io_buffer();
  wuffs_base__io_buffer* v_w = &u_w;
  uint8_t* iop_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io0_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_v_w WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint64_t v_num_written = 0;
  uint64_t v_w_mark = 0;
  uint64_t v_r_mark = 0;
  wuffs_base__status v_zlib_status = wuffs_base__make_status(NULL);

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_tell_me_more;
  if (coro_susp_point) {
    v_zlib_status = self->private_data.s_do_tell_me_more.v_zlib_status;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (((uint8_t)(self->private_impl.f_call_sequence & 16u)) == 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    if (self->private_impl.f_metadata_fourcc == 0u) {
      status = wuffs_base__make_status(wuffs_base__error__no_more_information);
      goto exit;
    }
    do {
      if (self->private_impl.f_metadata_flavor == 3u) {
        while (true) {
          if (wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src))) != self->private_impl.f_metadata_y) {
            status = wuffs_base__make_status(wuffs_base__error__bad_i_o_position);
            goto exit;
          } else if (a_minfo != NULL) {
            wuffs_base__more_information__set(a_minfo,
                self->private_impl.f_metadata_flavor,
                self->private_impl.f_metadata_fourcc,
                self->private_impl.f_metadata_x,
                self->private_impl.f_metadata_y,
                self->private_impl.f_metadata_z);
          }
          if (self->private_impl.f_metadata_y >= self->private_impl.f_metadata_z) {
            goto label__goto_done__break;
          }
          self->private_impl.f_metadata_y = self->private_impl.f_metadata_z;
          status = wuffs_base__make_status(wuffs_base__suspension__even_more_information);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
        }
      }
      if (self->private_impl.f_metadata_is_zlib_compressed) {
        if (self->private_impl.f_zlib_is_dirty) {
          wuffs_private_impl__ignore_status(wuffs_zlib__decoder__initialize(&self->private_data.f_zlib,
              sizeof (wuffs_zlib__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
          if (self->private_impl.f_ignore_checksum) {
            wuffs_zlib__decoder__set_quirk(&self->private_data.f_zlib, 1u, 1u);
          }
        }
        self->private_impl.f_zlib_is_dirty = true;
        self->private_impl.f_ztxt_hist_pos = 0u;
      }
      label__loop__continue:;
      while (true) {
        if (a_minfo != NULL) {
          wuffs_base__more_information__set(a_minfo,
              self->private_impl.f_metadata_flavor,
              self->private_impl.f_metadata_fourcc,
              self->private_impl.f_metadata_x,
              self->private_impl.f_metadata_y,
              self->private_impl.f_metadata_z);
        }
        if (self->private_impl.f_metadata_flavor != 4u) {
          break;
        }
        if (self->private_impl.f_metadata_is_zlib_compressed) {
          if (self->private_impl.f_chunk_type == 1346585449u) {
            {
              const bool o_0_closed_a_src = a_src->meta.closed;
              const uint8_t* o_0_io2_a_src = io2_a_src;
              wuffs_private_impl__io_reader__limit(&io2_a_src, iop_a_src,
                  ((uint64_t)(self->private_impl.f_chunk_length)));
              if (a_src) {
                size_t n = ((size_t)(io2_a_src - a_src->data.ptr));
                a_src->meta.closed = a_src->meta.closed && (a_src->meta.wi <= n);
                a_src->meta.wi = n;
              }
              v_r_mark = ((uint64_t)(iop_a_src - io0_a_src));
              {
                if (a_dst) {
                  a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
                }
                if (a_src) {
                  a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
                }
                wuffs_base__status t_0 = wuffs_zlib__decoder__transform_io(&self->private_data.f_zlib, a_dst, a_src, wuffs_base__utility__empty_slice_u8());
                v_zlib_status = t_0;
                if (a_dst) {
                  iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
                }
                if (a_src) {
                  iop_a_src = a_src->data.ptr + a_src->meta.ri;
                }
              }
              wuffs_private_impl__u32__sat_sub_indirect(&self->private_impl.f_chunk_length, ((uint32_t)(wuffs_private_impl__io__count_since(v_r_mark, ((uint64_t)(iop_a_src - io0_a_src))))));
              io2_a_src = o_0_io2_a_src;
              if (a_src) {
                a_src->meta.closed = o_0_closed_a_src;
                a_src->meta.wi = ((size_t)(io2_a_src - a_src->data.ptr));
              }
            }
            if (wuffs_base__status__is_ok(&v_zlib_status)) {
              self->private_impl.f_metadata_is_zlib_compressed = false;
              break;
            } else if ( ! wuffs_base__status__is_suspension(&v_zlib_status)) {
              status = v_zlib_status;
              if (wuffs_base__status__is_error(&status)) {
                goto exit;
              } else if (wuffs_base__status__is_suspension(&status)) {
                status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
                goto exit;
              }
              goto ok;
            }
            status = v_zlib_status;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
          } else if (self->private_impl.f_chunk_type == 1951945833u) {
            {
              const bool o_1_closed_a_src = a_src->meta.closed;
              const uint8_t* o_1_io2_a_src = io2_a_src;
              wuffs_private_impl__io_reader__limit(&io2_a_src, iop_a_src,
                  ((uint64_t)(self->private_impl.f_chunk_length)));
              if (a_src) {
                size_t n = ((size_t)(io2_a_src - a_src->data.ptr));
                a_src->meta.closed = a_src->meta.closed && (a_src->meta.wi <= n);
                a_src->meta.wi = n;
              }
              v_r_mark = ((uint64_t)(iop_a_src - io0_a_src));
              {
                if (a_dst) {
                  a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
                }
                if (a_src) {
                  a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
                }
                wuffs_base__status t_1 = wuffs_zlib__decoder__transform_io(&self->private_data.f_zlib, a_dst, a_src, wuffs_base__utility__empty_slice_u8());
                v_zlib_status = t_1;
                if (a_dst) {
                  iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
                }
                if (a_src) {
                  iop_a_src = a_src->data.ptr + a_src->meta.ri;
                }
              }
              wuffs_private_impl__u32__sat_sub_indirect(&self->private_impl.f_chunk_length, ((uint32_t)(wuffs_private_impl__io__count_since(v_r_mark, ((uint64_t)(iop_a_src - io0_a_src))))));
              io2_a_src = o_1_io2_a_src;
              if (a_src) {
                a_src->meta.closed = o_1_closed_a_src;
                a_src->meta.wi = ((size_t)(io2_a_src - a_src->data.ptr));
              }
            }
            if (wuffs_base__status__is_ok(&v_zlib_status)) {
              self->private_impl.f_metadata_is_zlib_compressed = false;
              break;
            } else if ( ! wuffs_base__status__is_suspension(&v_zlib_status)) {
              status = v_zlib_status;
              if (wuffs_base__status__is_error(&status)) {
                goto exit;
              } else if (wuffs_base__status__is_suspension(&status)) {
                status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
                goto exit;
              }
              goto ok;
            }
            status = v_zlib_status;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
          } else if (self->private_impl.f_chunk_type == 1951945850u) {
            if (self->private_impl.f_ztxt_ri == self->private_impl.f_ztxt_wi) {
              {
                wuffs_base__io_buffer* o_2_v_w = v_w;
                uint8_t* o_2_iop_v_w = iop_v_w;
                uint8_t* o_2_io0_v_w = io0_v_w;
                uint8_t* o_2_io1_v_w = io1_v_w;
                uint8_t* o_2_io2_v_w = io2_v_w;
                v_w = wuffs_private_impl__io_writer__set(
                    &u_w,
                    &iop_v_w,
                    &io0_v_w,
                    &io1_v_w,
                    &io2_v_w,
                    wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024),
                    self->private_impl.f_ztxt_hist_pos);
                {
                  const bool o_3_closed_a_src = a_src->meta.closed;
                  const uint8_t* o_3_io2_a_src = io2_a_src;
                  wuffs_private_impl__io_reader__limit(&io2_a_src, iop_a_src,
                      ((uint64_t)(self->private_impl.f_chunk_length)));
                  if (a_src) {
                    size_t n = ((size_t)(io2_a_src - a_src->data.ptr));
                    a_src->meta.closed = a_src->meta.closed && (a_src->meta.wi <= n);
                    a_src->meta.wi = n;
                  }
                  v_w_mark = ((uint64_t)(iop_v_w - io0_v_w));
                  v_r_mark = ((uint64_t)(iop_a_src - io0_a_src));
                  {
                    u_w.meta.wi = ((size_t)(iop_v_w - u_w.data.ptr));
                    if (a_src) {
                      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
                    }
                    wuffs_base__status t_2 = wuffs_zlib__decoder__transform_io(&self->private_data.f_zlib, v_w, a_src, wuffs_base__utility__empty_slice_u8());
                    v_zlib_status = t_2;
                    iop_v_w = u_w.data.ptr + u_w.meta.wi;
                    if (a_src) {
                      iop_a_src = a_src->data.ptr + a_src->meta.ri;
                    }
                  }
                  wuffs_private_impl__u32__sat_sub_indirect(&self->private_impl.f_chunk_length, ((uint32_t)(wuffs_private_impl__io__count_since(v_r_mark, ((uint64_t)(iop_a_src - io0_a_src))))));
                  v_num_written = wuffs_private_impl__io__count_since(v_w_mark, ((uint64_t)(iop_v_w - io0_v_w)));
                  io2_a_src = o_3_io2_a_src;
                  if (a_src) {
                    a_src->meta.closed = o_3_closed_a_src;
                    a_src->meta.wi = ((size_t)(io2_a_src - a_src->data.ptr));
                  }
                }
                v_w = o_2_v_w;
                iop_v_w = o_2_iop_v_w;
                io0_v_w = o_2_io0_v_w;
                io1_v_w = o_2_io1_v_w;
                io2_v_w = o_2_io2_v_w;
              }
              if (v_num_written > 1024u) {
                status = wuffs_base__make_status(wuffs_png__error__internal_error_inconsistent_i_o);
                goto exit;
              }
              self->private_impl.f_ztxt_ri = 0u;
              self->private_impl.f_ztxt_wi = ((uint32_t)(v_num_written));
              wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_ztxt_hist_pos, v_num_written);
            }
            while (self->private_impl.f_ztxt_ri < self->private_impl.f_ztxt_wi) {
              v_c16 = WUFFS_PNG__LATIN_1[self->private_data.f_dst_palette[self->private_impl.f_ztxt_ri]];
              if (v_c16 == 0u) {
                status = wuffs_base__make_status(wuffs_png__error__bad_text_chunk_not_latin_1);
                goto exit;
              } else if (v_c16 <= 127u) {
                if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_write);
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4);
                  goto label__loop__continue;
                }
                self->private_impl.f_ztxt_ri += 1u;
                (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, ((uint8_t)(v_c16))), iop_a_dst += 1);
              } else {
                if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 1u) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_write);
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
                  goto label__loop__continue;
                }
                self->private_impl.f_ztxt_ri += 1u;
                (wuffs_base__poke_u16le__no_bounds_check(iop_a_dst, v_c16), iop_a_dst += 2);
              }
            }
            if (wuffs_base__status__is_ok(&v_zlib_status)) {
              self->private_impl.f_metadata_is_zlib_compressed = false;
              break;
            } else if ( ! wuffs_base__status__is_suspension(&v_zlib_status)) {
              status = v_zlib_status;
              if (wuffs_base__status__is_error(&status)) {
                goto exit;
              } else if (wuffs_base__status__is_suspension(&status)) {
                status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
                goto exit;
              }
              goto ok;
            } else if (v_zlib_status.repr != wuffs_base__suspension__short_write) {
              status = v_zlib_status;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(6);
            }
          } else {
            status = wuffs_base__make_status(wuffs_png__error__internal_error_inconsistent_chunk_type);
            goto exit;
          }
        } else if ((self->private_impl.f_chunk_type == 1951945833u) && (self->private_impl.f_metadata_fourcc == 1263947862u)) {
          while (true) {
            if (self->private_impl.f_chunk_length <= 0u) {
              goto label__loop__break;
            } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(7);
              goto label__loop__continue;
            } else if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_write);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(8);
              goto label__loop__continue;
            }
            self->private_impl.f_chunk_length -= 1u;
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
            (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, v_c8), iop_a_dst += 1);
          }
        } else {
          while (true) {
            if (self->private_impl.f_chunk_length <= 0u) {
              if (self->private_impl.f_metadata_fourcc == 1263947851u) {
                status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
                goto exit;
              }
              goto label__loop__break;
            } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(9);
              goto label__loop__continue;
            }
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            if (v_c8 == 0u) {
              self->private_impl.f_chunk_length -= 1u;
              iop_a_src += 1u;
              goto label__loop__break;
            }
            v_c16 = WUFFS_PNG__LATIN_1[v_c8];
            if (v_c16 == 0u) {
              status = wuffs_base__make_status(wuffs_png__error__bad_text_chunk_not_latin_1);
              goto exit;
            } else if (v_c16 <= 127u) {
              if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 0u) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_write);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10);
                goto label__loop__continue;
              }
              self->private_impl.f_chunk_length -= 1u;
              iop_a_src += 1u;
              (wuffs_base__poke_u8be__no_bounds_check(iop_a_dst, ((uint8_t)(v_c16))), iop_a_dst += 1);
            } else {
              if (((uint64_t)(io2_a_dst - iop_a_dst)) <= 1u) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_write);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(11);
                goto label__loop__continue;
              }
              self->private_impl.f_chunk_length -= 1u;
              iop_a_src += 1u;
              (wuffs_base__poke_u16le__no_bounds_check(iop_a_dst, v_c16), iop_a_dst += 2);
            }
          }
        }
      }
      label__loop__break:;
      if (self->private_impl.f_metadata_fourcc == 1263947851u) {
        self->private_impl.f_metadata_fourcc = 1263947862u;
        if (self->private_impl.f_chunk_type == 1951945833u) {
          if (self->private_impl.f_chunk_length <= 1u) {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          self->private_impl.f_chunk_length -= 2u;
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_3 = *iop_a_src++;
            v_c8 = t_3;
          }
          if (v_c8 == 0u) {
            self->private_impl.f_metadata_is_zlib_compressed = false;
          } else if (v_c8 == 1u) {
            self->private_impl.f_metadata_is_zlib_compressed = true;
          } else {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_4 = *iop_a_src++;
            v_c8 = t_4;
          }
          if ((v_c8 != 0u) && self->private_impl.f_metadata_is_zlib_compressed) {
            status = wuffs_base__make_status(wuffs_png__error__unsupported_png_compression_method);
            goto exit;
          }
          self->private_impl.f_metadata_fourcc -= 2u;
          while (self->private_impl.f_metadata_fourcc != 1263947862u) {
            self->private_impl.f_metadata_fourcc += 1u;
            while (true) {
              if (self->private_impl.f_chunk_length <= 0u) {
                status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
                goto exit;
              }
              self->private_impl.f_chunk_length -= 1u;
              {
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint8_t t_5 = *iop_a_src++;
                v_c8 = t_5;
              }
              if (v_c8 == 0u) {
                break;
              }
            }
          }
        } else if (self->private_impl.f_chunk_type == 1951945850u) {
          if (self->private_impl.f_chunk_length <= 0u) {
            status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
            goto exit;
          }
          self->private_impl.f_chunk_length -= 1u;
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_6 = *iop_a_src++;
            v_c8 = t_6;
          }
          if (v_c8 != 0u) {
            status = wuffs_base__make_status(wuffs_png__error__unsupported_png_compression_method);
            goto exit;
          }
          self->private_impl.f_metadata_is_zlib_compressed = true;
        }
        self->private_impl.f_call_sequence &= 239u;
        status = wuffs_base__make_status(NULL);
        goto ok;
      }
    } while (0);
    label__goto_done__break:;
    if (self->private_impl.f_chunk_length != 0u) {
      status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
      goto exit;
    }
    self->private_data.s_do_tell_me_more.scratch = 4u;
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
    if (self->private_data.s_do_tell_me_more.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
      self->private_data.s_do_tell_me_more.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
      iop_a_src = io2_a_src;
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      goto suspend;
    }
    iop_a_src += self->private_data.s_do_tell_me_more.scratch;
    self->private_impl.f_metadata_flavor = 0u;
    self->private_impl.f_metadata_fourcc = 0u;
    self->private_impl.f_metadata_x = 0u;
    self->private_impl.f_metadata_y = 0u;
    self->private_impl.f_metadata_z = 0u;
    self->private_impl.f_call_sequence &= 239u;
    status = wuffs_base__make_status(NULL);
    goto ok;

    ok:
    self->private_impl.p_do_tell_me_more = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_tell_me_more = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_tell_me_more.v_zlib_status = v_zlib_status;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func png.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_png__decoder__workbuf_len(
    const wuffs_png__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(self->private_impl.f_overall_workbuf_length, self->private_impl.f_overall_workbuf_length);
}

// -------- func png.decoder.filter_and_swizzle

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__filter_and_swizzle(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf) {
  return (*self->private_impl.choosy_filter_and_swizzle)(self, a_dst, a_workbuf);
}

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__filter_and_swizzle__choosy_default(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint64_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row0 = 0;
  uint64_t v_dst_bytes_per_row1 = 0;
  wuffs_base__slice_u8 v_dst_palette = {0};
  wuffs_base__table_u8 v_tab = {0};
  uint32_t v_y = 0;
  wuffs_base__slice_u8 v_dst = {0};
  uint8_t v_filter = 0;
  wuffs_base__slice_u8 v_curr_row = {0};
  wuffs_base__slice_u8 v_prev_row = {0};

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  v_dst_bytes_per_pixel = ((uint64_t)((v_dst_bits_per_pixel / 8u)));
  v_dst_bytes_per_row0 = (((uint64_t)(self->private_impl.f_frame_rect_x0)) * v_dst_bytes_per_pixel);
  v_dst_bytes_per_row1 = (((uint64_t)(self->private_impl.f_frame_rect_x1)) * v_dst_bytes_per_pixel);
  v_dst_palette = wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  if (v_dst_bytes_per_row1 < ((uint64_t)(v_tab.width))) {
    v_tab = wuffs_base__table_u8__subtable_ij(v_tab,
        0u,
        0u,
        v_dst_bytes_per_row1,
        ((uint64_t)(v_tab.height)));
  }
  if (v_dst_bytes_per_row0 < ((uint64_t)(v_tab.width))) {
    v_tab = wuffs_base__table_u8__subtable_ij(v_tab,
        v_dst_bytes_per_row0,
        0u,
        ((uint64_t)(v_tab.width)),
        ((uint64_t)(v_tab.height)));
  } else {
    v_tab = wuffs_base__table_u8__subtable_ij(v_tab,
        0u,
        0u,
        0u,
        0u);
  }
  v_y = self->private_impl.f_frame_rect_y0;
  while (v_y < self->private_impl.f_frame_rect_y1) {
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, v_y);
    if (1u > ((uint64_t)(a_workbuf.len))) {
      return wuffs_base__make_status(wuffs_png__error__internal_error_inconsistent_workbuf_length);
    }
    v_filter = a_workbuf.ptr[0u];
    a_workbuf = wuffs_base__slice_u8__subslice_i(a_workbuf, 1u);
    if (self->private_impl.f_pass_bytes_per_row > ((uint64_t)(a_workbuf.len))) {
      return wuffs_base__make_status(wuffs_png__error__internal_error_inconsistent_workbuf_length);
    }
    v_curr_row = wuffs_base__slice_u8__subslice_j(a_workbuf, self->private_impl.f_pass_bytes_per_row);
    a_workbuf = wuffs_base__slice_u8__subslice_i(a_workbuf, self->private_impl.f_pass_bytes_per_row);
    if (v_filter == 0u) {
    } else if (v_filter == 1u) {
      wuffs_png__decoder__filter_1(self, v_curr_row);
    } else if (v_filter == 2u) {
      wuffs_png__decoder__filter_2(self, v_curr_row, v_prev_row);
    } else if (v_filter == 3u) {
      wuffs_png__decoder__filter_3(self, v_curr_row, v_prev_row);
    } else if (v_filter == 4u) {
      wuffs_png__decoder__filter_4(self, v_curr_row, v_prev_row);
    } else {
      return wuffs_base__make_status(wuffs_png__error__bad_filter);
    }
    wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, v_dst_palette, v_curr_row);
    v_prev_row = v_curr_row;
    v_y += 1u;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func png.decoder.filter_and_swizzle_tricky

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_png__decoder__filter_and_swizzle_tricky(
    wuffs_png__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint64_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row1 = 0;
  wuffs_base__slice_u8 v_dst_palette = {0};
  wuffs_base__table_u8 v_tab = {0};
  uint64_t v_src_bytes_per_pixel = 0;
  uint32_t v_x = 0;
  uint32_t v_y = 0;
  uint64_t v_i = 0;
  wuffs_base__slice_u8 v_dst = {0};
  uint8_t v_filter = 0;
  wuffs_base__slice_u8 v_s = {0};
  wuffs_base__slice_u8 v_curr_row = {0};
  wuffs_base__slice_u8 v_prev_row = {0};
  uint8_t v_bits_unpacked[8] = {0};
  uint8_t v_bits_packed = 0;
  uint8_t v_packs_remaining = 0;
  uint8_t v_multiplier = 0;
  uint8_t v_shift = 0;

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  v_dst_bytes_per_pixel = ((uint64_t)((v_dst_bits_per_pixel / 8u)));
  v_dst_bytes_per_row1 = (((uint64_t)(self->private_impl.f_frame_rect_x1)) * v_dst_bytes_per_pixel);
  v_dst_palette = wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  v_src_bytes_per_pixel = 1u;
  if (self->private_impl.f_depth >= 8u) {
    v_src_bytes_per_pixel = (((uint64_t)(WUFFS_PNG__NUM_CHANNELS[self->private_impl.f_color_type])) * ((uint64_t)(((uint8_t)(self->private_impl.f_depth >> 3u)))));
  }
  if (self->private_impl.f_chunk_type_array[0u] == 73u) {
    v_y = ((uint32_t)(WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][5u]));
  } else {
    v_y = self->private_impl.f_frame_rect_y0;
  }
  while (v_y < self->private_impl.f_frame_rect_y1) {
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, v_y);
    if (v_dst_bytes_per_row1 < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row1);
    }
    if (1u > ((uint64_t)(a_workbuf.len))) {
      return wuffs_base__make_status(wuffs_png__error__internal_error_inconsistent_workbuf_length);
    }
    v_filter = a_workbuf.ptr[0u];
    a_workbuf = wuffs_base__slice_u8__subslice_i(a_workbuf, 1u);
    if (self->private_impl.f_pass_bytes_per_row > ((uint64_t)(a_workbuf.len))) {
      return wuffs_base__make_status(wuffs_png__error__internal_error_inconsistent_workbuf_length);
    }
    v_curr_row = wuffs_base__slice_u8__subslice_j(a_workbuf, self->private_impl.f_pass_bytes_per_row);
    a_workbuf = wuffs_base__slice_u8__subslice_i(a_workbuf, self->private_impl.f_pass_bytes_per_row);
    if (v_filter == 0u) {
    } else if (v_filter == 1u) {
      wuffs_png__decoder__filter_1(self, v_curr_row);
    } else if (v_filter == 2u) {
      wuffs_png__decoder__filter_2(self, v_curr_row, v_prev_row);
    } else if (v_filter == 3u) {
      wuffs_png__decoder__filter_3(self, v_curr_row, v_prev_row);
    } else if (v_filter == 4u) {
      wuffs_png__decoder__filter_4(self, v_curr_row, v_prev_row);
    } else {
      return wuffs_base__make_status(wuffs_png__error__bad_filter);
    }
    v_s = v_curr_row;
    if (self->private_impl.f_chunk_type_array[0u] == 73u) {
      v_x = ((uint32_t)(WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][2u]));
    } else {
      v_x = self->private_impl.f_frame_rect_x0;
    }
    if (self->private_impl.f_depth == 8u) {
      while (v_x < self->private_impl.f_frame_rect_x1) {
        v_i = (((uint64_t)(v_x)) * v_dst_bytes_per_pixel);
        if (v_i <= ((uint64_t)(v_dst.len))) {
          if (((uint32_t)(self->private_impl.f_remap_transparency)) != 0u) {
            if (self->private_impl.f_color_type == 0u) {
              if (1u <= ((uint64_t)(v_s.len))) {
                v_bits_unpacked[0u] = v_s.ptr[0u];
                v_bits_unpacked[1u] = v_s.ptr[0u];
                v_bits_unpacked[2u] = v_s.ptr[0u];
                v_bits_unpacked[3u] = 255u;
                v_s = wuffs_base__slice_u8__subslice_i(v_s, 1u);
                if (((uint32_t)(self->private_impl.f_remap_transparency)) == ((((uint32_t)(v_bits_unpacked[0u])) << 0u) |
                    (((uint32_t)(v_bits_unpacked[1u])) << 8u) |
                    (((uint32_t)(v_bits_unpacked[2u])) << 16u) |
                    (((uint32_t)(v_bits_unpacked[3u])) << 24u))) {
                  v_bits_unpacked[0u] = 0u;
                  v_bits_unpacked[1u] = 0u;
                  v_bits_unpacked[2u] = 0u;
                  v_bits_unpacked[3u] = 0u;
                }
                wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), v_dst_palette, wuffs_base__make_slice_u8(v_bits_unpacked, 4));
              }
            } else {
              if (3u <= ((uint64_t)(v_s.len))) {
                v_bits_unpacked[0u] = v_s.ptr[2u];
                v_bits_unpacked[1u] = v_s.ptr[1u];
                v_bits_unpacked[2u] = v_s.ptr[0u];
                v_bits_unpacked[3u] = 255u;
                v_s = wuffs_base__slice_u8__subslice_i(v_s, 3u);
                if (((uint32_t)(self->private_impl.f_remap_transparency)) == ((((uint32_t)(v_bits_unpacked[0u])) << 0u) |
                    (((uint32_t)(v_bits_unpacked[1u])) << 8u) |
                    (((uint32_t)(v_bits_unpacked[2u])) << 16u) |
                    (((uint32_t)(v_bits_unpacked[3u])) << 24u))) {
                  v_bits_unpacked[0u] = 0u;
                  v_bits_unpacked[1u] = 0u;
                  v_bits_unpacked[2u] = 0u;
                  v_bits_unpacked[3u] = 0u;
                }
                wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), v_dst_palette, wuffs_base__make_slice_u8(v_bits_unpacked, 4));
              }
            }
          } else if (v_src_bytes_per_pixel <= ((uint64_t)(v_s.len))) {
            wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), v_dst_palette, wuffs_base__slice_u8__subslice_j(v_s, v_src_bytes_per_pixel));
            v_s = wuffs_base__slice_u8__subslice_i(v_s, v_src_bytes_per_pixel);
          }
        }
        v_x += (((uint32_t)(1u)) << WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][0u]);
      }
    } else if (self->private_impl.f_depth < 8u) {
      v_multiplier = 1u;
      if (self->private_impl.f_color_type == 0u) {
        v_multiplier = WUFFS_PNG__LOW_BIT_DEPTH_MULTIPLIERS[self->private_impl.f_depth];
      }
      v_shift = ((uint8_t)(((uint8_t)(8u - self->private_impl.f_depth)) & 7u));
      v_packs_remaining = 0u;
      while (v_x < self->private_impl.f_frame_rect_x1) {
        v_i = (((uint64_t)(v_x)) * v_dst_bytes_per_pixel);
        if (v_i <= ((uint64_t)(v_dst.len))) {
          if ((v_packs_remaining == 0u) && (1u <= ((uint64_t)(v_s.len)))) {
            v_packs_remaining = WUFFS_PNG__LOW_BIT_DEPTH_NUM_PACKS[self->private_impl.f_depth];
            v_bits_packed = v_s.ptr[0u];
            v_s = wuffs_base__slice_u8__subslice_i(v_s, 1u);
          }
          v_bits_unpacked[0u] = ((uint8_t)(((uint8_t)(v_bits_packed >> v_shift)) * v_multiplier));
          v_bits_packed = ((uint8_t)(v_bits_packed << self->private_impl.f_depth));
          v_packs_remaining = ((uint8_t)(v_packs_remaining - 1u));
          if (((uint32_t)(self->private_impl.f_remap_transparency)) != 0u) {
            v_bits_unpacked[1u] = v_bits_unpacked[0u];
            v_bits_unpacked[2u] = v_bits_unpacked[0u];
            v_bits_unpacked[3u] = 255u;
            if (((uint32_t)(self->private_impl.f_remap_transparency)) == ((((uint32_t)(v_bits_unpacked[0u])) << 0u) |
                (((uint32_t)(v_bits_unpacked[1u])) << 8u) |
                (((uint32_t)(v_bits_unpacked[2u])) << 16u) |
                (((uint32_t)(v_bits_unpacked[3u])) << 24u))) {
              v_bits_unpacked[0u] = 0u;
              v_bits_unpacked[1u] = 0u;
              v_bits_unpacked[2u] = 0u;
              v_bits_unpacked[3u] = 0u;
            }
            wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), v_dst_palette, wuffs_base__make_slice_u8(v_bits_unpacked, 4));
          } else {
            wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), v_dst_palette, wuffs_base__make_slice_u8(v_bits_unpacked, 1));
          }
        }
        v_x += (((uint32_t)(1u)) << WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][0u]);
      }
    } else {
      while (v_x < self->private_impl.f_frame_rect_x1) {
        v_i = (((uint64_t)(v_x)) * v_dst_bytes_per_pixel);
        if (v_i <= ((uint64_t)(v_dst.len))) {
          if (self->private_impl.f_color_type == 0u) {
            if (2u <= ((uint64_t)(v_s.len))) {
              v_bits_unpacked[0u] = v_s.ptr[1u];
              v_bits_unpacked[1u] = v_s.ptr[0u];
              v_bits_unpacked[2u] = v_s.ptr[1u];
              v_bits_unpacked[3u] = v_s.ptr[0u];
              v_bits_unpacked[4u] = v_s.ptr[1u];
              v_bits_unpacked[5u] = v_s.ptr[0u];
              v_bits_unpacked[6u] = 255u;
              v_bits_unpacked[7u] = 255u;
              v_s = wuffs_base__slice_u8__subslice_i(v_s, 2u);
              if (self->private_impl.f_remap_transparency == ((((uint64_t)(v_bits_unpacked[0u])) << 0u) |
                  (((uint64_t)(v_bits_unpacked[1u])) << 8u) |
                  (((uint64_t)(v_bits_unpacked[2u])) << 16u) |
                  (((uint64_t)(v_bits_unpacked[3u])) << 24u) |
                  (((uint64_t)(v_bits_unpacked[4u])) << 32u) |
                  (((uint64_t)(v_bits_unpacked[5u])) << 40u) |
                  (((uint64_t)(v_bits_unpacked[6u])) << 48u) |
                  (((uint64_t)(v_bits_unpacked[7u])) << 56u))) {
                v_bits_unpacked[0u] = 0u;
                v_bits_unpacked[1u] = 0u;
                v_bits_unpacked[2u] = 0u;
                v_bits_unpacked[3u] = 0u;
                v_bits_unpacked[4u] = 0u;
                v_bits_unpacked[5u] = 0u;
                v_bits_unpacked[6u] = 0u;
                v_bits_unpacked[7u] = 0u;
              }
            }
          } else if (self->private_impl.f_color_type == 2u) {
            if (6u <= ((uint64_t)(v_s.len))) {
              v_bits_unpacked[0u] = v_s.ptr[5u];
              v_bits_unpacked[1u] = v_s.ptr[4u];
              v_bits_unpacked[2u] = v_s.ptr[3u];
              v_bits_unpacked[3u] = v_s.ptr[2u];
              v_bits_unpacked[4u] = v_s.ptr[1u];
              v_bits_unpacked[5u] = v_s.ptr[0u];
              v_bits_unpacked[6u] = 255u;
              v_bits_unpacked[7u] = 255u;
              v_s = wuffs_base__slice_u8__subslice_i(v_s, 6u);
              if (self->private_impl.f_remap_transparency == ((((uint64_t)(v_bits_unpacked[0u])) << 0u) |
                  (((uint64_t)(v_bits_unpacked[1u])) << 8u) |
                  (((uint64_t)(v_bits_unpacked[2u])) << 16u) |
                  (((uint64_t)(v_bits_unpacked[3u])) << 24u) |
                  (((uint64_t)(v_bits_unpacked[4u])) << 32u) |
                  (((uint64_t)(v_bits_unpacked[5u])) << 40u) |
                  (((uint64_t)(v_bits_unpacked[6u])) << 48u) |
                  (((uint64_t)(v_bits_unpacked[7u])) << 56u))) {
                v_bits_unpacked[0u] = 0u;
                v_bits_unpacked[1u] = 0u;
                v_bits_unpacked[2u] = 0u;
                v_bits_unpacked[3u] = 0u;
                v_bits_unpacked[4u] = 0u;
                v_bits_unpacked[5u] = 0u;
                v_bits_unpacked[6u] = 0u;
                v_bits_unpacked[7u] = 0u;
              }
            }
          } else if (self->private_impl.f_color_type == 4u) {
            if (4u <= ((uint64_t)(v_s.len))) {
              v_bits_unpacked[0u] = v_s.ptr[1u];
              v_bits_unpacked[1u] = v_s.ptr[0u];
              v_bits_unpacked[2u] = v_s.ptr[1u];
              v_bits_unpacked[3u] = v_s.ptr[0u];
              v_bits_unpacked[4u] = v_s.ptr[1u];
              v_bits_unpacked[5u] = v_s.ptr[0u];
              v_bits_unpacked[6u] = v_s.ptr[3u];
              v_bits_unpacked[7u] = v_s.ptr[2u];
              v_s = wuffs_base__slice_u8__subslice_i(v_s, 4u);
            }
          } else {
            if (8u <= ((uint64_t)(v_s.len))) {
              v_bits_unpacked[0u] = v_s.ptr[5u];
              v_bits_unpacked[1u] = v_s.ptr[4u];
              v_bits_unpacked[2u] = v_s.ptr[3u];
              v_bits_unpacked[3u] = v_s.ptr[2u];
              v_bits_unpacked[4u] = v_s.ptr[1u];
              v_bits_unpacked[5u] = v_s.ptr[0u];
              v_bits_unpacked[6u] = v_s.ptr[7u];
              v_bits_unpacked[7u] = v_s.ptr[6u];
              v_s = wuffs_base__slice_u8__subslice_i(v_s, 8u);
            }
          }
          wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), v_dst_palette, wuffs_base__make_slice_u8(v_bits_unpacked, 8));
        }
        v_x += (((uint32_t)(1u)) << WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][0u]);
      }
    }
    v_prev_row = v_curr_row;
    v_y += (((uint32_t)(1u)) << WUFFS_PNG__INTERLACING[self->private_impl.f_interlace_pass][3u]);
  }
  return wuffs_base__make_status(NULL);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__PNG)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__QOI)

// ---------------- Status Codes Implementations

const char wuffs_qoi__error__bad_footer[] = "#qoi: bad footer";
const char wuffs_qoi__error__bad_header[] = "#qoi: bad header";
const char wuffs_qoi__error__truncated_input[] = "#qoi: truncated input";

// ---------------- Private Consts

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__do_decode_image_config(
    wuffs_qoi__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__do_decode_frame_config(
    wuffs_qoi__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__do_decode_frame(
    wuffs_qoi__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__from_src_to_buffer(
    wuffs_qoi__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__from_buffer_to_dst(
    wuffs_qoi__decoder* self,
    wuffs_base__pixel_buffer* a_dst);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_qoi__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_qoi__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_qoi__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_qoi__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_qoi__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_qoi__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_qoi__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_qoi__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_qoi__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_qoi__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_qoi__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_qoi__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_qoi__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_qoi__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_qoi__decoder__initialize(
    wuffs_qoi__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_qoi__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_qoi__decoder*
wuffs_qoi__decoder__alloc(void) {
  wuffs_qoi__decoder* x =
      (wuffs_qoi__decoder*)(calloc(1, sizeof(wuffs_qoi__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_qoi__decoder__initialize(
      x, sizeof(wuffs_qoi__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_qoi__decoder(void) {
  return sizeof(wuffs_qoi__decoder);
}

// ---------------- Function Implementations

// -------- func qoi.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_qoi__decoder__get_quirk(
    const wuffs_qoi__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func qoi.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__set_quirk(
    wuffs_qoi__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func qoi.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__decode_image_config(
    wuffs_qoi__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_qoi__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_qoi__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func qoi.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__do_decode_image_config(
    wuffs_qoi__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_a = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_a = t_0;
    }
    if (v_a != 1718185841u) {
      status = wuffs_base__make_status(wuffs_qoi__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1);
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1));
        }
      }
      v_a = t_1;
    }
    if (v_a > 16777215u) {
      status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
      goto exit;
    }
    self->private_impl.f_width = v_a;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      uint32_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_2 = wuffs_base__peek_u32be__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_2);
          if (num_bits_2 == 24) {
            t_2 = ((uint32_t)(*scratch >> 32));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2));
        }
      }
      v_a = t_2;
    }
    if (v_a > 16777215u) {
      status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
      goto exit;
    }
    self->private_impl.f_height = v_a;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint32_t t_3 = *iop_a_src++;
      v_a = t_3;
    }
    if (v_a == 3u) {
      self->private_impl.f_pixfmt = 2415954056u;
    } else if (v_a == 4u) {
      self->private_impl.f_pixfmt = 2164295816u;
    } else {
      status = wuffs_base__make_status(wuffs_qoi__error__bad_header);
      goto exit;
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
    if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      goto suspend;
    }
    iop_a_src++;
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          self->private_impl.f_pixfmt,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          14u,
          (self->private_impl.f_pixfmt == 2415954056u));
    }
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func qoi.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__decode_frame_config(
    wuffs_qoi__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_qoi__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_qoi__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func qoi.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__do_decode_frame_config(
    wuffs_qoi__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_qoi__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (14u != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          14u,
          0u,
          (self->private_impl.f_pixfmt == 2415954056u),
          false,
          0u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func qoi.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__decode_frame(
    wuffs_qoi__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_qoi__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_qoi__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func qoi.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__do_decode_frame(
    wuffs_qoi__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint64_t v_c64 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_qoi__decoder__do_decode_frame_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette(a_dst),
        wuffs_base__utility__make_pixel_format(self->private_impl.f_pixfmt),
        wuffs_base__utility__empty_slice_u8(),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    self->private_impl.f_dst_x = 0u;
    self->private_impl.f_dst_y = 0u;
    self->private_data.f_pixel[0u] = 0u;
    self->private_data.f_pixel[1u] = 0u;
    self->private_data.f_pixel[2u] = 0u;
    self->private_data.f_pixel[3u] = 255u;
    wuffs_private_impl__bulk_memset(&self->private_data.f_cache[0], 256u, 0u);
    self->private_impl.f_remaining_pixels_times_4 = (((uint64_t)(self->private_impl.f_width)) * ((uint64_t)(self->private_impl.f_height)) * 4u);
    while (self->private_impl.f_remaining_pixels_times_4 > 0u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      status = wuffs_qoi__decoder__from_src_to_buffer(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      if (self->private_impl.f_remaining_pixels_times_4 < ((uint64_t)(self->private_impl.f_buffer_index))) {
        status = wuffs_base__make_status(wuffs_base__error__too_much_data);
        goto exit;
      }
      self->private_impl.f_remaining_pixels_times_4 -= ((uint64_t)(self->private_impl.f_buffer_index));
      v_status = wuffs_qoi__decoder__from_buffer_to_dst(self, a_dst);
      if ( ! wuffs_base__status__is_ok(&v_status)) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      }
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint64_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
        t_0 = wuffs_base__peek_u64be__no_bounds_check(iop_a_src);
        iop_a_src += 8;
      } else {
        self->private_data.s_do_decode_frame.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_frame.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFFu));
          *scratch >>= 8;
          *scratch <<= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
          if (num_bits_0 == 56) {
            t_0 = ((uint64_t)(*scratch >> 0));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0));
        }
      }
      v_c64 = t_0;
    }
    if (v_c64 != 1u) {
      status = wuffs_base__make_status(wuffs_qoi__error__bad_footer);
      goto exit;
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func qoi.decoder.from_src_to_buffer

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__from_src_to_buffer(
    wuffs_qoi__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint8_t v_dg = 0;
  uint32_t v_bi = 0;
  uint32_t v_bj = 0;
  uint32_t v_bk = 0;
  uint32_t v_ci = 0;
  uint32_t v_hash4 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_from_src_to_buffer;
  if (coro_susp_point) {
    v_dg = self->private_data.s_from_src_to_buffer.v_dg;
    v_bi = self->private_data.s_from_src_to_buffer.v_bi;
    v_bk = self->private_data.s_from_src_to_buffer.v_bk;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    v_bk = 7936u;
    if (self->private_impl.f_remaining_pixels_times_4 < 7936u) {
      v_bk = ((uint32_t)(self->private_impl.f_remaining_pixels_times_4));
    }
    while (v_bi < v_bk) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      if (v_c8 == 254u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          self->private_data.f_pixel[2u] = t_1;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          self->private_data.f_pixel[1u] = t_2;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_3 = *iop_a_src++;
          self->private_data.f_pixel[0u] = t_3;
        }
      } else if (v_c8 == 255u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_4 = *iop_a_src++;
          self->private_data.f_pixel[2u] = t_4;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_5 = *iop_a_src++;
          self->private_data.f_pixel[1u] = t_5;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_6 = *iop_a_src++;
          self->private_data.f_pixel[0u] = t_6;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_7 = *iop_a_src++;
          self->private_data.f_pixel[3u] = t_7;
        }
      } else if (((uint8_t)(v_c8 >> 6u)) == 0u) {
        v_ci = (4u * ((uint32_t)(((uint8_t)(v_c8 & 63u)))));
        self->private_data.f_pixel[0u] = self->private_data.f_cache[(v_ci + 0u)];
        self->private_data.f_pixel[1u] = self->private_data.f_cache[(v_ci + 1u)];
        self->private_data.f_pixel[2u] = self->private_data.f_cache[(v_ci + 2u)];
        self->private_data.f_pixel[3u] = self->private_data.f_cache[(v_ci + 3u)];
        self->private_data.f_buffer[(v_bi + 0u)] = self->private_data.f_pixel[0u];
        self->private_data.f_buffer[(v_bi + 1u)] = self->private_data.f_pixel[1u];
        self->private_data.f_buffer[(v_bi + 2u)] = self->private_data.f_pixel[2u];
        self->private_data.f_buffer[(v_bi + 3u)] = self->private_data.f_pixel[3u];
        v_bi += 4u;
        continue;
      } else if (((uint8_t)(v_c8 >> 6u)) == 1u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        self->private_data.f_pixel[2u] += ((uint8_t)(((uint8_t)(((uint8_t)(v_c8 >> 4u)) & 3u)) + 254u));
        self->private_data.f_pixel[1u] += ((uint8_t)(((uint8_t)(((uint8_t)(v_c8 >> 2u)) & 3u)) + 254u));
        self->private_data.f_pixel[0u] += ((uint8_t)(((uint8_t)(((uint8_t)(v_c8 >> 0u)) & 3u)) + 254u));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (((uint8_t)(v_c8 >> 6u)) == 2u) {
        v_dg = ((uint8_t)(((uint8_t)(v_c8 & 63u)) + 224u));
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_8 = *iop_a_src++;
          v_c8 = t_8;
        }
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        self->private_data.f_pixel[2u] += ((uint8_t)(((uint8_t)(v_dg + 248u)) + ((uint8_t)(15u & ((uint8_t)(v_c8 >> 4u))))));
        self->private_data.f_pixel[1u] += v_dg;
        self->private_data.f_pixel[0u] += ((uint8_t)(((uint8_t)(v_dg + 248u)) + ((uint8_t)(15u & ((uint8_t)(v_c8 >> 0u))))));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else {
        v_bj = (v_bi + (4u * (63u & (1u + ((uint32_t)(v_c8))))));
        while (v_bi < v_bj) {
          self->private_data.f_buffer[(v_bi + 0u)] = self->private_data.f_pixel[0u];
          self->private_data.f_buffer[(v_bi + 1u)] = self->private_data.f_pixel[1u];
          self->private_data.f_buffer[(v_bi + 2u)] = self->private_data.f_pixel[2u];
          self->private_data.f_buffer[(v_bi + 3u)] = self->private_data.f_pixel[3u];
          v_bi += 4u;
        }
        continue;
      }
      v_hash4 = (4u * (63u & ((((uint32_t)(self->private_data.f_pixel[2u])) * 3u) +
          (((uint32_t)(self->private_data.f_pixel[1u])) * 5u) +
          (((uint32_t)(self->private_data.f_pixel[0u])) * 7u) +
          (((uint32_t)(self->private_data.f_pixel[3u])) * 11u))));
      self->private_data.f_cache[(v_hash4 + 0u)] = self->private_data.f_pixel[0u];
      self->private_data.f_cache[(v_hash4 + 1u)] = self->private_data.f_pixel[1u];
      self->private_data.f_cache[(v_hash4 + 2u)] = self->private_data.f_pixel[2u];
      self->private_data.f_cache[(v_hash4 + 3u)] = self->private_data.f_pixel[3u];
      self->private_data.f_buffer[(v_bi + 0u)] = self->private_data.f_pixel[0u];
      self->private_data.f_buffer[(v_bi + 1u)] = self->private_data.f_pixel[1u];
      self->private_data.f_buffer[(v_bi + 2u)] = self->private_data.f_pixel[2u];
      self->private_data.f_buffer[(v_bi + 3u)] = self->private_data.f_pixel[3u];
      v_bi += 4u;
    }
    self->private_impl.f_buffer_index = v_bi;

    goto ok;
    ok:
    self->private_impl.p_from_src_to_buffer = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_from_src_to_buffer = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_from_src_to_buffer.v_dg = v_dg;
  self->private_data.s_from_src_to_buffer.v_bi = v_bi;
  self->private_data.s_from_src_to_buffer.v_bk = v_bk;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func qoi.decoder.from_buffer_to_dst

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_qoi__decoder__from_buffer_to_dst(
    wuffs_qoi__decoder* self,
    wuffs_base__pixel_buffer* a_dst) {
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  wuffs_base__table_u8 v_tab = {0};
  uint32_t v_bi = 0;
  uint32_t v_rem_x = 0;
  wuffs_base__slice_u8 v_dst = {0};
  wuffs_base__slice_u8 v_src = {0};
  uint32_t v_src_length = 0;
  uint64_t v_i = 0;

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  while (v_bi < self->private_impl.f_buffer_index) {
    if (self->private_impl.f_width <= self->private_impl.f_dst_x) {
      self->private_impl.f_dst_x = 0u;
      self->private_impl.f_dst_y += 1u;
      if (self->private_impl.f_dst_y >= self->private_impl.f_height) {
        break;
      }
      v_rem_x = self->private_impl.f_width;
    } else {
      v_rem_x = (self->private_impl.f_width - self->private_impl.f_dst_x);
    }
    v_src = wuffs_base__make_slice_u8_ij(self->private_data.f_buffer, v_bi, self->private_impl.f_buffer_index);
    if (((uint64_t)((4u * v_rem_x))) < ((uint64_t)(v_src.len))) {
      v_src = wuffs_base__slice_u8__subslice_j(v_src, ((uint64_t)((4u * v_rem_x))));
    }
    v_src_length = ((uint32_t)(((uint64_t)(v_src.len))));
    v_bi += v_src_length;
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
    if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
    }
    v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_dst_bytes_per_pixel)));
    self->private_impl.f_dst_x += (v_src_length / 4u);
    if (v_i < ((uint64_t)(v_dst.len))) {
      wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), wuffs_base__pixel_buffer__palette(a_dst), v_src);
    }
  }
  return wuffs_base__make_status(NULL);
}

// -------- func qoi.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_qoi__decoder__frame_dirty_rect(
    const wuffs_qoi__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func qoi.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_qoi__decoder__num_animation_loops(
    const wuffs_qoi__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func qoi.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_qoi__decoder__num_decoded_frame_configs(
    const wuffs_qoi__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func qoi.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_qoi__decoder__num_decoded_frames(
    const wuffs_qoi__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func qoi.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__restart_frame(
    wuffs_qoi__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if ((a_index != 0u) || (a_io_position != 14u)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  return wuffs_base__make_status(NULL);
}

// -------- func qoi.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_qoi__decoder__set_report_metadata(
    wuffs_qoi__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func qoi.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_qoi__decoder__tell_me_more(
    wuffs_qoi__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func qoi.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_qoi__decoder__workbuf_len(
    const wuffs_qoi__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__QOI)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__SHA256)

// ---------------- Status Codes Implementations

// ---------------- Private Consts

static const uint32_t
WUFFS_SHA256__INITIAL_SHA256_H[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1779033703u, 3144134277u, 1013904242u, 2773480762u, 1359893119u, 2600822924u, 528734635u, 1541459225u,
};

static const uint32_t
WUFFS_SHA256__K[64] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1116352408u, 1899447441u, 3049323471u, 3921009573u, 961987163u, 1508970993u, 2453635748u, 2870763221u,
  3624381080u, 310598401u, 607225278u, 1426881987u, 1925078388u, 2162078206u, 2614888103u, 3248222580u,
  3835390401u, 4022224774u, 264347078u, 604807628u, 770255983u, 1249150122u, 1555081692u, 1996064986u,
  2554220882u, 2821834349u, 2952996808u, 3210313671u, 3336571891u, 3584528711u, 113926993u, 338241895u,
  666307205u, 773529912u, 1294757372u, 1396182291u, 1695183700u, 1986661051u, 2177026350u, 2456956037u,
  2730485921u, 2820302411u, 3259730800u, 3345764771u, 3516065817u, 3600352804u, 4094571909u, 275423344u,
  430227734u, 506948616u, 659060556u, 883997877u, 958139571u, 1322822218u, 1537002063u, 1747873779u,
  1955562222u, 2024104815u, 2227730452u, 2361852424u, 2428436474u, 2756734187u, 3204031479u, 3329325298u,
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_sha256__hasher__up(
    wuffs_sha256__hasher* self,
    wuffs_base__slice_u8 a_x);

// ---------------- VTables

const wuffs_base__hasher_bitvec256__func_ptrs
wuffs_sha256__hasher__func_ptrs_for__wuffs_base__hasher_bitvec256 = {
  (wuffs_base__bitvec256(*)(const void*))(&wuffs_sha256__hasher__checksum_bitvec256),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_sha256__hasher__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_sha256__hasher__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      wuffs_base__slice_u8))(&wuffs_sha256__hasher__update),
  (wuffs_base__bitvec256(*)(void*,
      wuffs_base__slice_u8))(&wuffs_sha256__hasher__update_bitvec256),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_sha256__hasher__initialize(
    wuffs_sha256__hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__hasher_bitvec256.vtable_name =
      wuffs_base__hasher_bitvec256__vtable_name;
  self->private_impl.vtable_for__wuffs_base__hasher_bitvec256.function_pointers =
      (const void*)(&wuffs_sha256__hasher__func_ptrs_for__wuffs_base__hasher_bitvec256);
  return wuffs_base__make_status(NULL);
}

wuffs_sha256__hasher*
wuffs_sha256__hasher__alloc(void) {
  wuffs_sha256__hasher* x =
      (wuffs_sha256__hasher*)(calloc(1, sizeof(wuffs_sha256__hasher)));
  if (!x) {
    return NULL;
  }
  if (wuffs_sha256__hasher__initialize(
      x, sizeof(wuffs_sha256__hasher), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_sha256__hasher(void) {
  return sizeof(wuffs_sha256__hasher);
}

// ---------------- Function Implementations

// -------- func sha256.hasher.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_sha256__hasher__get_quirk(
    const wuffs_sha256__hasher* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func sha256.hasher.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_sha256__hasher__set_quirk(
    wuffs_sha256__hasher* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func sha256.hasher.update

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_sha256__hasher__update(
    wuffs_sha256__hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  uint64_t v_new_lmu = 0;

  if ((self->private_impl.f_length_modulo_u64 == 0u) &&  ! self->private_impl.f_length_overflows_u64) {
    self->private_impl.f_h0 = WUFFS_SHA256__INITIAL_SHA256_H[0u];
    self->private_impl.f_h1 = WUFFS_SHA256__INITIAL_SHA256_H[1u];
    self->private_impl.f_h2 = WUFFS_SHA256__INITIAL_SHA256_H[2u];
    self->private_impl.f_h3 = WUFFS_SHA256__INITIAL_SHA256_H[3u];
    self->private_impl.f_h4 = WUFFS_SHA256__INITIAL_SHA256_H[4u];
    self->private_impl.f_h5 = WUFFS_SHA256__INITIAL_SHA256_H[5u];
    self->private_impl.f_h6 = WUFFS_SHA256__INITIAL_SHA256_H[6u];
    self->private_impl.f_h7 = WUFFS_SHA256__INITIAL_SHA256_H[7u];
  }
  v_new_lmu = ((uint64_t)(self->private_impl.f_length_modulo_u64 + ((uint64_t)(a_x.len))));
  self->private_impl.f_length_overflows_u64 = ((v_new_lmu < self->private_impl.f_length_modulo_u64) || self->private_impl.f_length_overflows_u64);
  self->private_impl.f_length_modulo_u64 = v_new_lmu;
  if (self->private_impl.f_buf_len != 0u) {
    while (self->private_impl.f_buf_len < 64u) {
      if (((uint64_t)(a_x.len)) <= 0u) {
        return wuffs_base__make_empty_struct();
      }
      self->private_impl.f_buf_data[self->private_impl.f_buf_len] = a_x.ptr[0u];
      self->private_impl.f_buf_len += 1u;
      a_x = wuffs_base__slice_u8__subslice_i(a_x, 1u);
    }
    self->private_impl.f_buf_len = 0u;
    wuffs_sha256__hasher__up(self, wuffs_base__make_slice_u8(self->private_impl.f_buf_data, 64));
  }
  wuffs_sha256__hasher__up(self, a_x);
  return wuffs_base__make_empty_struct();
}

// -------- func sha256.hasher.update_bitvec256

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__bitvec256
wuffs_sha256__hasher__update_bitvec256(
    wuffs_sha256__hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
  }

  wuffs_sha256__hasher__update(self, a_x);
  return wuffs_sha256__hasher__checksum_bitvec256(self);
}

// -------- func sha256.hasher.up

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_sha256__hasher__up(
    wuffs_sha256__hasher* self,
    wuffs_base__slice_u8 a_x) {
  wuffs_base__slice_u8 v_p = {0};
  uint32_t v_w[64] = {0};
  uint32_t v_w2 = 0;
  uint32_t v_w15 = 0;
  uint32_t v_s0 = 0;
  uint32_t v_s1 = 0;
  uint32_t v_t1 = 0;
  uint32_t v_t2 = 0;
  uint32_t v_a = 0;
  uint32_t v_b = 0;
  uint32_t v_c = 0;
  uint32_t v_d = 0;
  uint32_t v_e = 0;
  uint32_t v_f = 0;
  uint32_t v_g = 0;
  uint32_t v_h = 0;
  uint32_t v_i = 0;
  uint32_t v_buf_len = 0;

  v_a = self->private_impl.f_h0;
  v_b = self->private_impl.f_h1;
  v_c = self->private_impl.f_h2;
  v_d = self->private_impl.f_h3;
  v_e = self->private_impl.f_h4;
  v_f = self->private_impl.f_h5;
  v_g = self->private_impl.f_h6;
  v_h = self->private_impl.f_h7;
  {
    wuffs_base__slice_u8 i_slice_p = a_x;
    v_p.ptr = i_slice_p.ptr;
    v_p.len = 64;
    const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 64) * 64));
    while (v_p.ptr < i_end0_p) {
      v_w[0u] = ((((uint32_t)(v_p.ptr[0u])) << 24u) |
          (((uint32_t)(v_p.ptr[1u])) << 16u) |
          (((uint32_t)(v_p.ptr[2u])) << 8u) |
          ((uint32_t)(v_p.ptr[3u])));
      v_w[1u] = ((((uint32_t)(v_p.ptr[4u])) << 24u) |
          (((uint32_t)(v_p.ptr[5u])) << 16u) |
          (((uint32_t)(v_p.ptr[6u])) << 8u) |
          ((uint32_t)(v_p.ptr[7u])));
      v_w[2u] = ((((uint32_t)(v_p.ptr[8u])) << 24u) |
          (((uint32_t)(v_p.ptr[9u])) << 16u) |
          (((uint32_t)(v_p.ptr[10u])) << 8u) |
          ((uint32_t)(v_p.ptr[11u])));
      v_w[3u] = ((((uint32_t)(v_p.ptr[12u])) << 24u) |
          (((uint32_t)(v_p.ptr[13u])) << 16u) |
          (((uint32_t)(v_p.ptr[14u])) << 8u) |
          ((uint32_t)(v_p.ptr[15u])));
      v_w[4u] = ((((uint32_t)(v_p.ptr[16u])) << 24u) |
          (((uint32_t)(v_p.ptr[17u])) << 16u) |
          (((uint32_t)(v_p.ptr[18u])) << 8u) |
          ((uint32_t)(v_p.ptr[19u])));
      v_w[5u] = ((((uint32_t)(v_p.ptr[20u])) << 24u) |
          (((uint32_t)(v_p.ptr[21u])) << 16u) |
          (((uint32_t)(v_p.ptr[22u])) << 8u) |
          ((uint32_t)(v_p.ptr[23u])));
      v_w[6u] = ((((uint32_t)(v_p.ptr[24u])) << 24u) |
          (((uint32_t)(v_p.ptr[25u])) << 16u) |
          (((uint32_t)(v_p.ptr[26u])) << 8u) |
          ((uint32_t)(v_p.ptr[27u])));
      v_w[7u] = ((((uint32_t)(v_p.ptr[28u])) << 24u) |
          (((uint32_t)(v_p.ptr[29u])) << 16u) |
          (((uint32_t)(v_p.ptr[30u])) << 8u) |
          ((uint32_t)(v_p.ptr[31u])));
      v_w[8u] = ((((uint32_t)(v_p.ptr[32u])) << 24u) |
          (((uint32_t)(v_p.ptr[33u])) << 16u) |
          (((uint32_t)(v_p.ptr[34u])) << 8u) |
          ((uint32_t)(v_p.ptr[35u])));
      v_w[9u] = ((((uint32_t)(v_p.ptr[36u])) << 24u) |
          (((uint32_t)(v_p.ptr[37u])) << 16u) |
          (((uint32_t)(v_p.ptr[38u])) << 8u) |
          ((uint32_t)(v_p.ptr[39u])));
      v_w[10u] = ((((uint32_t)(v_p.ptr[40u])) << 24u) |
          (((uint32_t)(v_p.ptr[41u])) << 16u) |
          (((uint32_t)(v_p.ptr[42u])) << 8u) |
          ((uint32_t)(v_p.ptr[43u])));
      v_w[11u] = ((((uint32_t)(v_p.ptr[44u])) << 24u) |
          (((uint32_t)(v_p.ptr[45u])) << 16u) |
          (((uint32_t)(v_p.ptr[46u])) << 8u) |
          ((uint32_t)(v_p.ptr[47u])));
      v_w[12u] = ((((uint32_t)(v_p.ptr[48u])) << 24u) |
          (((uint32_t)(v_p.ptr[49u])) << 16u) |
          (((uint32_t)(v_p.ptr[50u])) << 8u) |
          ((uint32_t)(v_p.ptr[51u])));
      v_w[13u] = ((((uint32_t)(v_p.ptr[52u])) << 24u) |
          (((uint32_t)(v_p.ptr[53u])) << 16u) |
          (((uint32_t)(v_p.ptr[54u])) << 8u) |
          ((uint32_t)(v_p.ptr[55u])));
      v_w[14u] = ((((uint32_t)(v_p.ptr[56u])) << 24u) |
          (((uint32_t)(v_p.ptr[57u])) << 16u) |
          (((uint32_t)(v_p.ptr[58u])) << 8u) |
          ((uint32_t)(v_p.ptr[59u])));
      v_w[15u] = ((((uint32_t)(v_p.ptr[60u])) << 24u) |
          (((uint32_t)(v_p.ptr[61u])) << 16u) |
          (((uint32_t)(v_p.ptr[62u])) << 8u) |
          ((uint32_t)(v_p.ptr[63u])));
      v_i = 16u;
      while (v_i < 64u) {
        v_w2 = v_w[(v_i - 2u)];
        v_s1 = ((v_w2 >> 10u) ^ (((uint32_t)(v_w2 << 15u)) | (v_w2 >> 17u)) ^ (((uint32_t)(v_w2 << 13u)) | (v_w2 >> 19u)));
        v_w15 = v_w[(v_i - 15u)];
        v_s0 = ((v_w15 >> 3u) ^ (((uint32_t)(v_w15 << 25u)) | (v_w15 >> 7u)) ^ (((uint32_t)(v_w15 << 14u)) | (v_w15 >> 18u)));
        v_w[v_i] = ((uint32_t)(((uint32_t)(((uint32_t)(v_s1 + v_w[(v_i - 7u)])) + v_s0)) + v_w[(v_i - 16u)]));
        v_i += 1u;
      }
      v_i = 0u;
      while (v_i < 64u) {
        v_t1 = v_h;
        v_t1 += ((((uint32_t)(v_e << 26u)) | (v_e >> 6u)) ^ (((uint32_t)(v_e << 21u)) | (v_e >> 11u)) ^ (((uint32_t)(v_e << 7u)) | (v_e >> 25u)));
        v_t1 += ((v_e & v_f) ^ ((4294967295u ^ v_e) & v_g));
        v_t1 += WUFFS_SHA256__K[v_i];
        v_t1 += v_w[v_i];
        v_t2 = ((((uint32_t)(v_a << 30u)) | (v_a >> 2u)) ^ (((uint32_t)(v_a << 19u)) | (v_a >> 13u)) ^ (((uint32_t)(v_a << 10u)) | (v_a >> 22u)));
        v_t2 += ((v_a & v_b) ^ (v_a & v_c) ^ (v_b & v_c));
        v_h = v_g;
        v_g = v_f;
        v_f = v_e;
        v_e = ((uint32_t)(v_d + v_t1));
        v_d = v_c;
        v_c = v_b;
        v_b = v_a;
        v_a = ((uint32_t)(v_t1 + v_t2));
        v_i += 1u;
      }
      v_a += self->private_impl.f_h0;
      self->private_impl.f_h0 = v_a;
      v_b += self->private_impl.f_h1;
      self->private_impl.f_h1 = v_b;
      v_c += self->private_impl.f_h2;
      self->private_impl.f_h2 = v_c;
      v_d += self->private_impl.f_h3;
      self->private_impl.f_h3 = v_d;
      v_e += self->private_impl.f_h4;
      self->private_impl.f_h4 = v_e;
      v_f += self->private_impl.f_h5;
      self->private_impl.f_h5 = v_f;
      v_g += self->private_impl.f_h6;
      self->private_impl.f_h6 = v_g;
      v_h += self->private_impl.f_h7;
      self->private_impl.f_h7 = v_h;
      v_p.ptr += 64;
    }
    v_p.len = 1;
    const uint8_t* i_end1_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
    while (v_p.ptr < i_end1_p) {
      self->private_impl.f_buf_data[v_buf_len] = v_p.ptr[0u];
      v_buf_len = ((v_buf_len + 1u) & 63u);
      v_p.ptr += 1;
    }
    v_p.len = 0;
  }
  self->private_impl.f_buf_len = ((uint32_t)((((uint64_t)(a_x.len)) & 63u)));
  return wuffs_base__make_empty_struct();
}

// -------- func sha256.hasher.checksum_bitvec256

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__bitvec256
wuffs_sha256__hasher__checksum_bitvec256(
    const wuffs_sha256__hasher* self) {
  if (!self) {
    return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_bitvec256(0u, 0u, 0u, 0u);
  }

  uint32_t v_buf_len = 0;
  uint8_t v_buf_data[64] = {0};
  uint64_t v_length_in_bits = 0;
  uint32_t v_w[64] = {0};
  uint32_t v_w2 = 0;
  uint32_t v_w15 = 0;
  uint32_t v_s0 = 0;
  uint32_t v_s1 = 0;
  uint32_t v_t1 = 0;
  uint32_t v_t2 = 0;
  uint32_t v_h0 = 0;
  uint32_t v_h1 = 0;
  uint32_t v_h2 = 0;
  uint32_t v_h3 = 0;
  uint32_t v_h4 = 0;
  uint32_t v_h5 = 0;
  uint32_t v_h6 = 0;
  uint32_t v_h7 = 0;
  uint32_t v_a = 0;
  uint32_t v_b = 0;
  uint32_t v_c = 0;
  uint32_t v_d = 0;
  uint32_t v_e = 0;
  uint32_t v_f = 0;
  uint32_t v_g = 0;
  uint32_t v_h = 0;
  uint32_t v_i = 0;
  bool v_final_block = false;

  v_i = 0u;
  while (v_i < 64u) {
    v_buf_data[v_i] = self->private_impl.f_buf_data[v_i];
    v_i += 1u;
  }
  v_buf_len = (self->private_impl.f_buf_len & 63u);
  if (v_buf_len < 56u) {
    v_buf_data[v_buf_len] = 128u;
    v_buf_len += 1u;
    while (v_buf_len < 56u) {
      v_buf_data[v_buf_len] = 0u;
      v_buf_len += 1u;
    }
    v_final_block = true;
  } else {
    v_buf_data[v_buf_len] = 128u;
    v_buf_len += 1u;
    while (v_buf_len < 64u) {
      v_buf_data[v_buf_len] = 0u;
      v_buf_len += 1u;
    }
  }
  v_h0 = self->private_impl.f_h0;
  v_a = v_h0;
  v_h1 = self->private_impl.f_h1;
  v_b = v_h1;
  v_h2 = self->private_impl.f_h2;
  v_c = v_h2;
  v_h3 = self->private_impl.f_h3;
  v_d = v_h3;
  v_h4 = self->private_impl.f_h4;
  v_e = v_h4;
  v_h5 = self->private_impl.f_h5;
  v_f = v_h5;
  v_h6 = self->private_impl.f_h6;
  v_g = v_h6;
  v_h7 = self->private_impl.f_h7;
  v_h = v_h7;
  while (true) {
    if (v_final_block) {
      v_length_in_bits = ((uint64_t)(self->private_impl.f_length_modulo_u64 * 8u));
      v_buf_data[56u] = ((uint8_t)((v_length_in_bits >> 56u)));
      v_buf_data[57u] = ((uint8_t)((v_length_in_bits >> 48u)));
      v_buf_data[58u] = ((uint8_t)((v_length_in_bits >> 40u)));
      v_buf_data[59u] = ((uint8_t)((v_length_in_bits >> 32u)));
      v_buf_data[60u] = ((uint8_t)((v_length_in_bits >> 24u)));
      v_buf_data[61u] = ((uint8_t)((v_length_in_bits >> 16u)));
      v_buf_data[62u] = ((uint8_t)((v_length_in_bits >> 8u)));
      v_buf_data[63u] = ((uint8_t)(v_length_in_bits));
    }
    v_w[0u] = ((((uint32_t)(v_buf_data[0u])) << 24u) |
        (((uint32_t)(v_buf_data[1u])) << 16u) |
        (((uint32_t)(v_buf_data[2u])) << 8u) |
        ((uint32_t)(v_buf_data[3u])));
    v_w[1u] = ((((uint32_t)(v_buf_data[4u])) << 24u) |
        (((uint32_t)(v_buf_data[5u])) << 16u) |
        (((uint32_t)(v_buf_data[6u])) << 8u) |
        ((uint32_t)(v_buf_data[7u])));
    v_w[2u] = ((((uint32_t)(v_buf_data[8u])) << 24u) |
        (((uint32_t)(v_buf_data[9u])) << 16u) |
        (((uint32_t)(v_buf_data[10u])) << 8u) |
        ((uint32_t)(v_buf_data[11u])));
    v_w[3u] = ((((uint32_t)(v_buf_data[12u])) << 24u) |
        (((uint32_t)(v_buf_data[13u])) << 16u) |
        (((uint32_t)(v_buf_data[14u])) << 8u) |
        ((uint32_t)(v_buf_data[15u])));
    v_w[4u] = ((((uint32_t)(v_buf_data[16u])) << 24u) |
        (((uint32_t)(v_buf_data[17u])) << 16u) |
        (((uint32_t)(v_buf_data[18u])) << 8u) |
        ((uint32_t)(v_buf_data[19u])));
    v_w[5u] = ((((uint32_t)(v_buf_data[20u])) << 24u) |
        (((uint32_t)(v_buf_data[21u])) << 16u) |
        (((uint32_t)(v_buf_data[22u])) << 8u) |
        ((uint32_t)(v_buf_data[23u])));
    v_w[6u] = ((((uint32_t)(v_buf_data[24u])) << 24u) |
        (((uint32_t)(v_buf_data[25u])) << 16u) |
        (((uint32_t)(v_buf_data[26u])) << 8u) |
        ((uint32_t)(v_buf_data[27u])));
    v_w[7u] = ((((uint32_t)(v_buf_data[28u])) << 24u) |
        (((uint32_t)(v_buf_data[29u])) << 16u) |
        (((uint32_t)(v_buf_data[30u])) << 8u) |
        ((uint32_t)(v_buf_data[31u])));
    v_w[8u] = ((((uint32_t)(v_buf_data[32u])) << 24u) |
        (((uint32_t)(v_buf_data[33u])) << 16u) |
        (((uint32_t)(v_buf_data[34u])) << 8u) |
        ((uint32_t)(v_buf_data[35u])));
    v_w[9u] = ((((uint32_t)(v_buf_data[36u])) << 24u) |
        (((uint32_t)(v_buf_data[37u])) << 16u) |
        (((uint32_t)(v_buf_data[38u])) << 8u) |
        ((uint32_t)(v_buf_data[39u])));
    v_w[10u] = ((((uint32_t)(v_buf_data[40u])) << 24u) |
        (((uint32_t)(v_buf_data[41u])) << 16u) |
        (((uint32_t)(v_buf_data[42u])) << 8u) |
        ((uint32_t)(v_buf_data[43u])));
    v_w[11u] = ((((uint32_t)(v_buf_data[44u])) << 24u) |
        (((uint32_t)(v_buf_data[45u])) << 16u) |
        (((uint32_t)(v_buf_data[46u])) << 8u) |
        ((uint32_t)(v_buf_data[47u])));
    v_w[12u] = ((((uint32_t)(v_buf_data[48u])) << 24u) |
        (((uint32_t)(v_buf_data[49u])) << 16u) |
        (((uint32_t)(v_buf_data[50u])) << 8u) |
        ((uint32_t)(v_buf_data[51u])));
    v_w[13u] = ((((uint32_t)(v_buf_data[52u])) << 24u) |
        (((uint32_t)(v_buf_data[53u])) << 16u) |
        (((uint32_t)(v_buf_data[54u])) << 8u) |
        ((uint32_t)(v_buf_data[55u])));
    v_w[14u] = ((((uint32_t)(v_buf_data[56u])) << 24u) |
        (((uint32_t)(v_buf_data[57u])) << 16u) |
        (((uint32_t)(v_buf_data[58u])) << 8u) |
        ((uint32_t)(v_buf_data[59u])));
    v_w[15u] = ((((uint32_t)(v_buf_data[60u])) << 24u) |
        (((uint32_t)(v_buf_data[61u])) << 16u) |
        (((uint32_t)(v_buf_data[62u])) << 8u) |
        ((uint32_t)(v_buf_data[63u])));
    v_i = 16u;
    while (v_i < 64u) {
      v_w2 = v_w[(v_i - 2u)];
      v_s1 = ((v_w2 >> 10u) ^ (((uint32_t)(v_w2 << 15u)) | (v_w2 >> 17u)) ^ (((uint32_t)(v_w2 << 13u)) | (v_w2 >> 19u)));
      v_w15 = v_w[(v_i - 15u)];
      v_s0 = ((v_w15 >> 3u) ^ (((uint32_t)(v_w15 << 25u)) | (v_w15 >> 7u)) ^ (((uint32_t)(v_w15 << 14u)) | (v_w15 >> 18u)));
      v_w[v_i] = ((uint32_t)(((uint32_t)(((uint32_t)(v_s1 + v_w[(v_i - 7u)])) + v_s0)) + v_w[(v_i - 16u)]));
      v_i += 1u;
    }
    v_i = 0u;
    while (v_i < 64u) {
      v_t1 = v_h;
      v_t1 += ((((uint32_t)(v_e << 26u)) | (v_e >> 6u)) ^ (((uint32_t)(v_e << 21u)) | (v_e >> 11u)) ^ (((uint32_t)(v_e << 7u)) | (v_e >> 25u)));
      v_t1 += ((v_e & v_f) ^ ((4294967295u ^ v_e) & v_g));
      v_t1 += WUFFS_SHA256__K[v_i];
      v_t1 += v_w[v_i];
      v_t2 = ((((uint32_t)(v_a << 30u)) | (v_a >> 2u)) ^ (((uint32_t)(v_a << 19u)) | (v_a >> 13u)) ^ (((uint32_t)(v_a << 10u)) | (v_a >> 22u)));
      v_t2 += ((v_a & v_b) ^ (v_a & v_c) ^ (v_b & v_c));
      v_h = v_g;
      v_g = v_f;
      v_f = v_e;
      v_e = ((uint32_t)(v_d + v_t1));
      v_d = v_c;
      v_c = v_b;
      v_b = v_a;
      v_a = ((uint32_t)(v_t1 + v_t2));
      v_i += 1u;
    }
    v_a += v_h0;
    v_b += v_h1;
    v_c += v_h2;
    v_d += v_h3;
    v_e += v_h4;
    v_f += v_h5;
    v_g += v_h6;
    v_h += v_h7;
    if (v_final_block) {
      break;
    }
    v_final_block = true;
    v_h0 = v_a;
    v_h1 = v_b;
    v_h2 = v_c;
    v_h3 = v_d;
    v_h4 = v_e;
    v_h5 = v_f;
    v_h6 = v_g;
    v_h7 = v_h;
    v_buf_len = 0u;
    while (v_buf_len < 56u) {
      v_buf_data[v_buf_len] = 0u;
      v_buf_len += 1u;
    }
  }
  return wuffs_base__utility__make_bitvec256(
      (((uint64_t)(v_h)) | (((uint64_t)(v_g)) << 32u)),
      (((uint64_t)(v_f)) | (((uint64_t)(v_e)) << 32u)),
      (((uint64_t)(v_d)) | (((uint64_t)(v_c)) << 32u)),
      (((uint64_t)(v_b)) | (((uint64_t)(v_a)) << 32u)));
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__SHA256)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__TARGA)

// ---------------- Status Codes Implementations

const char wuffs_targa__error__bad_header[] = "#targa: bad header";
const char wuffs_targa__error__bad_run_length_encoding[] = "#targa: bad run length encoding";
const char wuffs_targa__error__truncated_input[] = "#targa: truncated input";
const char wuffs_targa__error__unsupported_targa_file[] = "#targa: unsupported TARGA file";

// ---------------- Private Consts

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_targa__decoder__do_decode_image_config(
    wuffs_targa__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_targa__decoder__do_decode_frame_config(
    wuffs_targa__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_targa__decoder__do_decode_frame(
    wuffs_targa__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_targa__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_targa__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_targa__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_targa__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_targa__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_targa__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_targa__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_targa__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_targa__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_targa__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_targa__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_targa__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_targa__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_targa__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_targa__decoder__initialize(
    wuffs_targa__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_targa__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_targa__decoder*
wuffs_targa__decoder__alloc(void) {
  wuffs_targa__decoder* x =
      (wuffs_targa__decoder*)(calloc(1, sizeof(wuffs_targa__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_targa__decoder__initialize(
      x, sizeof(wuffs_targa__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_targa__decoder(void) {
  return sizeof(wuffs_targa__decoder);
}

// ---------------- Function Implementations

// -------- func targa.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_targa__decoder__get_quirk(
    const wuffs_targa__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func targa.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__set_quirk(
    wuffs_targa__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func targa.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__decode_image_config(
    wuffs_targa__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_targa__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_targa__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func targa.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_targa__decoder__do_decode_image_config(
    wuffs_targa__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_c32 = 0;
  uint32_t v_c5 = 0;
  uint32_t v_i = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  if (coro_susp_point) {
    v_i = self->private_data.s_do_decode_image_config.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      self->private_impl.f_header_id_length = t_0;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_1 = *iop_a_src++;
      self->private_impl.f_header_color_map_type = t_1;
    }
    if (self->private_impl.f_header_color_map_type > 1u) {
      status = wuffs_base__make_status(wuffs_targa__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_2 = *iop_a_src++;
      self->private_impl.f_header_image_type = t_2;
    }
    if ((self->private_impl.f_header_image_type == 1u) ||
        (self->private_impl.f_header_image_type == 2u) ||
        (self->private_impl.f_header_image_type == 3u) ||
        (self->private_impl.f_header_image_type == 9u) ||
        (self->private_impl.f_header_image_type == 10u) ||
        (self->private_impl.f_header_image_type == 11u)) {
    } else {
      status = wuffs_base__make_status(wuffs_targa__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      uint16_t t_3;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_3 = wuffs_base__peek_u16le__no_bounds_check(iop_a_src);
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_3 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_3;
          if (num_bits_3 == 8) {
            t_3 = ((uint16_t)(*scratch));
            break;
          }
          num_bits_3 += 8u;
          *scratch |= ((uint64_t)(num_bits_3)) << 56;
        }
      }
      self->private_impl.f_header_color_map_first_entry_index = t_3;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
      uint16_t t_4;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_4 = wuffs_base__peek_u16le__no_bounds_check(iop_a_src);
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_4 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4;
          if (num_bits_4 == 8) {
            t_4 = ((uint16_t)(*scratch));
            break;
          }
          num_bits_4 += 8u;
          *scratch |= ((uint64_t)(num_bits_4)) << 56;
        }
      }
      self->private_impl.f_header_color_map_length = t_4;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_5 = *iop_a_src++;
      self->private_impl.f_header_color_map_entry_size = t_5;
    }
    if (self->private_impl.f_header_color_map_type != 0u) {
      if ((self->private_impl.f_header_color_map_first_entry_index != 0u) || (self->private_impl.f_header_color_map_length > 256u)) {
        status = wuffs_base__make_status(wuffs_targa__error__unsupported_targa_file);
        goto exit;
      } else if ((self->private_impl.f_header_color_map_entry_size != 15u) &&
          (self->private_impl.f_header_color_map_entry_size != 16u) &&
          (self->private_impl.f_header_color_map_entry_size != 24u) &&
          (self->private_impl.f_header_color_map_entry_size != 32u)) {
        status = wuffs_base__make_status(wuffs_targa__error__bad_header);
        goto exit;
      }
    } else {
      if ((self->private_impl.f_header_color_map_first_entry_index != 0u) || (self->private_impl.f_header_color_map_length != 0u) || (self->private_impl.f_header_color_map_entry_size != 0u)) {
        status = wuffs_base__make_status(wuffs_targa__error__bad_header);
        goto exit;
      }
    }
    self->private_data.s_do_decode_image_config.scratch = 4u;
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
    if (self->private_data.s_do_decode_image_config.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
      self->private_data.s_do_decode_image_config.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
      iop_a_src = io2_a_src;
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      goto suspend;
    }
    iop_a_src += self->private_data.s_do_decode_image_config.scratch;
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
      uint32_t t_6;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_6 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_6 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_6;
          if (num_bits_6 == 8) {
            t_6 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_6 += 8u;
          *scratch |= ((uint64_t)(num_bits_6)) << 56;
        }
      }
      self->private_impl.f_width = t_6;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
      uint32_t t_7;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_7 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_7 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_7;
          if (num_bits_7 == 8) {
            t_7 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_7 += 8u;
          *scratch |= ((uint64_t)(num_bits_7)) << 56;
        }
      }
      self->private_impl.f_height = t_7;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_8 = *iop_a_src++;
      self->private_impl.f_header_pixel_depth = t_8;
    }
    if ((self->private_impl.f_header_pixel_depth != 1u) &&
        (self->private_impl.f_header_pixel_depth != 8u) &&
        (self->private_impl.f_header_pixel_depth != 15u) &&
        (self->private_impl.f_header_pixel_depth != 16u) &&
        (self->private_impl.f_header_pixel_depth != 24u) &&
        (self->private_impl.f_header_pixel_depth != 32u)) {
      status = wuffs_base__make_status(wuffs_targa__error__bad_header);
      goto exit;
    }
    if (((uint8_t)(self->private_impl.f_header_image_type | 8u)) == 9u) {
      self->private_impl.f_scratch_bytes_per_pixel = 1u;
      self->private_impl.f_src_bytes_per_pixel = 1u;
      self->private_impl.f_src_pixfmt = 2164523016u;
      self->private_impl.f_opaque = ((self->private_impl.f_header_color_map_entry_size == 15u) || (self->private_impl.f_header_color_map_entry_size == 24u));
    } else if (((uint8_t)(self->private_impl.f_header_image_type | 8u)) == 10u) {
      if ((self->private_impl.f_header_pixel_depth == 15u) || (self->private_impl.f_header_pixel_depth == 16u)) {
        self->private_impl.f_scratch_bytes_per_pixel = 4u;
        self->private_impl.f_src_bytes_per_pixel = 0u;
        self->private_impl.f_src_pixfmt = 2164295816u;
      } else if (self->private_impl.f_header_pixel_depth == 24u) {
        self->private_impl.f_scratch_bytes_per_pixel = 3u;
        self->private_impl.f_src_bytes_per_pixel = 3u;
        self->private_impl.f_src_pixfmt = 2147485832u;
        self->private_impl.f_opaque = true;
      } else if (self->private_impl.f_header_pixel_depth == 32u) {
        self->private_impl.f_scratch_bytes_per_pixel = 4u;
        self->private_impl.f_src_bytes_per_pixel = 4u;
        self->private_impl.f_src_pixfmt = 2164295816u;
      } else {
        status = wuffs_base__make_status(wuffs_targa__error__unsupported_targa_file);
        goto exit;
      }
    } else {
      if (self->private_impl.f_header_pixel_depth == 8u) {
        self->private_impl.f_scratch_bytes_per_pixel = 1u;
        self->private_impl.f_src_bytes_per_pixel = 1u;
        self->private_impl.f_src_pixfmt = 536870920u;
        self->private_impl.f_opaque = true;
      } else {
        status = wuffs_base__make_status(wuffs_targa__error__unsupported_targa_file);
        goto exit;
      }
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_9 = *iop_a_src++;
      self->private_impl.f_header_image_descriptor = t_9;
    }
    if (((uint8_t)(self->private_impl.f_header_image_descriptor & 16u)) != 0u) {
      status = wuffs_base__make_status(wuffs_targa__error__unsupported_targa_file);
      goto exit;
    }
    self->private_data.s_do_decode_image_config.scratch = ((uint32_t)(self->private_impl.f_header_id_length));
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
    if (self->private_data.s_do_decode_image_config.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
      self->private_data.s_do_decode_image_config.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
      iop_a_src = io2_a_src;
      status = wuffs_base__make_status(wuffs_base__suspension__short_read);
      goto suspend;
    }
    iop_a_src += self->private_data.s_do_decode_image_config.scratch;
    if (self->private_impl.f_header_color_map_type != 0u) {
      while (v_i < ((uint32_t)(self->private_impl.f_header_color_map_length))) {
        if (self->private_impl.f_header_color_map_entry_size == 24u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(17);
            uint32_t t_10;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) {
              t_10 = ((uint32_t)(wuffs_base__peek_u24le__no_bounds_check(iop_a_src)));
              iop_a_src += 3;
            } else {
              self->private_data.s_do_decode_image_config.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(18);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
                uint32_t num_bits_10 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_10;
                if (num_bits_10 == 16) {
                  t_10 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_10 += 8u;
                *scratch |= ((uint64_t)(num_bits_10)) << 56;
              }
            }
            v_c32 = t_10;
          }
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 0u)] = ((uint8_t)((v_c32 >> 0u)));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 1u)] = ((uint8_t)((v_c32 >> 8u)));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 2u)] = ((uint8_t)((v_c32 >> 16u)));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 3u)] = 255u;
        } else if (self->private_impl.f_header_color_map_entry_size == 32u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(19);
            uint32_t t_11;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_11 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_do_decode_image_config.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(20);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
                uint32_t num_bits_11 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_11;
                if (num_bits_11 == 24) {
                  t_11 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_11 += 8u;
                *scratch |= ((uint64_t)(num_bits_11)) << 56;
              }
            }
            v_c32 = t_11;
          }
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 0u)] = ((uint8_t)((v_c32 >> 0u)));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 1u)] = ((uint8_t)((v_c32 >> 8u)));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 2u)] = ((uint8_t)((v_c32 >> 16u)));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 3u)] = ((uint8_t)((v_c32 >> 24u)));
        } else {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(21);
            uint32_t t_12;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
              t_12 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
              iop_a_src += 2;
            } else {
              self->private_data.s_do_decode_image_config.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(22);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
                uint32_t num_bits_12 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_12;
                if (num_bits_12 == 8) {
                  t_12 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_12 += 8u;
                *scratch |= ((uint64_t)(num_bits_12)) << 56;
              }
            }
            v_c32 = t_12;
          }
          v_c5 = (31u & (v_c32 >> 0u));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 0u)] = ((uint8_t)(((v_c5 << 3u) | (v_c5 >> 2u))));
          v_c5 = (31u & (v_c32 >> 5u));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 1u)] = ((uint8_t)(((v_c5 << 3u) | (v_c5 >> 2u))));
          v_c5 = (31u & (v_c32 >> 10u));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 2u)] = ((uint8_t)(((v_c5 << 3u) | (v_c5 >> 2u))));
          self->private_data.f_src_palette[(((v_i & 255u) * 4u) + 3u)] = 255u;
        }
        v_i += 1u;
      }
      while (v_i < 256u) {
        self->private_data.f_src_palette[((v_i * 4u) + 0u)] = 0u;
        self->private_data.f_src_palette[((v_i * 4u) + 1u)] = 0u;
        self->private_data.f_src_palette[((v_i * 4u) + 2u)] = 0u;
        self->private_data.f_src_palette[((v_i * 4u) + 3u)] = 255u;
        v_i += 1u;
      }
    }
    self->private_impl.f_frame_config_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          self->private_impl.f_src_pixfmt,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          self->private_impl.f_frame_config_io_position,
          self->private_impl.f_opaque);
    }
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_image_config.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func targa.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__decode_frame_config(
    wuffs_targa__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_targa__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_targa__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func targa.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_targa__decoder__do_decode_frame_config(
    wuffs_targa__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_targa__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (self->private_impl.f_frame_config_io_position != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          self->private_impl.f_frame_config_io_position,
          0u,
          self->private_impl.f_opaque,
          false,
          4278190080u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func targa.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__decode_frame(
    wuffs_targa__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_targa__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_targa__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func targa.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_targa__decoder__do_decode_frame(
    wuffs_targa__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint64_t v_dst_bytes_per_pixel = 0;
  uint32_t v_dst_x = 0;
  uint32_t v_dst_y = 0;
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_dst_palette = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint64_t v_dst_start = 0;
  wuffs_base__slice_u8 v_src_palette = {0};
  uint64_t v_mark = 0;
  uint64_t v_num_pixels64 = 0;
  uint32_t v_num_pixels32 = 0;
  uint32_t v_lit_length = 0;
  uint32_t v_run_length = 0;
  uint64_t v_num_dst_bytes = 0;
  uint32_t v_num_src_bytes = 0;
  uint32_t v_c32 = 0;
  uint32_t v_c5 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  if (coro_susp_point) {
    v_dst_bytes_per_pixel = self->private_data.s_do_decode_frame.v_dst_bytes_per_pixel;
    v_dst_x = self->private_data.s_do_decode_frame.v_dst_x;
    v_dst_y = self->private_data.s_do_decode_frame.v_dst_y;
    v_mark = self->private_data.s_do_decode_frame.v_mark;
    v_num_pixels32 = self->private_data.s_do_decode_frame.v_num_pixels32;
    v_lit_length = self->private_data.s_do_decode_frame.v_lit_length;
    v_run_length = self->private_data.s_do_decode_frame.v_run_length;
    v_num_dst_bytes = self->private_data.s_do_decode_frame.v_num_dst_bytes;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_targa__decoder__do_decode_frame_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (self->private_impl.f_header_color_map_type != 0u) {
      v_src_palette = wuffs_base__make_slice_u8(self->private_data.f_src_palette, 1024);
    }
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024)),
        wuffs_base__utility__make_pixel_format(self->private_impl.f_src_pixfmt),
        v_src_palette,
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
    v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
    if ((v_dst_bits_per_pixel & 7u) != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__unsupported_option);
      goto exit;
    }
    v_dst_bytes_per_pixel = ((uint64_t)((v_dst_bits_per_pixel / 8u)));
    if (((uint8_t)(self->private_impl.f_header_image_descriptor & 32u)) == 0u) {
      v_dst_y = ((uint32_t)(self->private_impl.f_height - 1u));
    }
    if (((uint8_t)(self->private_impl.f_header_image_type & 8u)) == 0u) {
      v_lit_length = self->private_impl.f_width;
    }
    label__resume__continue:;
    while (true) {
      v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
      v_dst_palette = wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024));
      while (v_dst_y < self->private_impl.f_height) {
        v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, v_dst_y);
        v_dst_start = (((uint64_t)(v_dst_x)) * v_dst_bytes_per_pixel);
        if (v_dst_start <= ((uint64_t)(v_dst.len))) {
          v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_dst_start);
        } else {
          v_dst = wuffs_base__utility__empty_slice_u8();
        }
        while (v_dst_x < self->private_impl.f_width) {
          if (self->private_impl.f_src_bytes_per_pixel > 0u) {
            if (v_lit_length > 0u) {
              v_mark = ((uint64_t)(iop_a_src - io0_a_src));
              v_num_pixels64 = (((uint64_t)(io2_a_src - iop_a_src)) / ((uint64_t)(self->private_impl.f_src_bytes_per_pixel)));
              v_num_pixels32 = ((uint32_t)(wuffs_base__u64__min(v_num_pixels64, ((uint64_t)(v_lit_length)))));
              v_num_dst_bytes = (((uint64_t)(v_num_pixels32)) * v_dst_bytes_per_pixel);
              v_num_src_bytes = (v_num_pixels32 * self->private_impl.f_src_bytes_per_pixel);
              self->private_data.s_do_decode_frame.scratch = v_num_src_bytes;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
              if (self->private_data.s_do_decode_frame.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
                self->private_data.s_do_decode_frame.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
                iop_a_src = io2_a_src;
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              iop_a_src += self->private_data.s_do_decode_frame.scratch;
              wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, v_dst_palette, wuffs_private_impl__io__since(v_mark, ((uint64_t)(iop_a_src - io0_a_src)), io0_a_src));
              if (v_num_dst_bytes <= ((uint64_t)(v_dst.len))) {
                v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_num_dst_bytes);
              } else {
                v_dst = wuffs_base__utility__empty_slice_u8();
              }
              v_dst_x += v_num_pixels32;
              v_lit_length = (((uint32_t)(v_lit_length - v_num_pixels32)) & 65535u);
              if (v_lit_length > 0u) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
                goto label__resume__continue;
              }
            } else if (v_run_length > 0u) {
              v_run_length -= 1u;
              wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, v_dst_palette, wuffs_base__make_slice_u8(self->private_data.f_scratch, self->private_impl.f_scratch_bytes_per_pixel));
              if (v_dst_bytes_per_pixel <= ((uint64_t)(v_dst.len))) {
                v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_dst_bytes_per_pixel);
              }
              v_dst_x += 1u;
            } else {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4);
                goto label__resume__continue;
              }
              if (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) < 128u) {
                v_lit_length = (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) + 1u);
                iop_a_src += 1u;
                if ((v_lit_length + v_dst_x) > self->private_impl.f_width) {
                  status = wuffs_base__make_status(wuffs_targa__error__bad_run_length_encoding);
                  goto exit;
                }
              } else {
                if (self->private_impl.f_src_bytes_per_pixel == 1u) {
                  if (((uint64_t)(io2_a_src - iop_a_src)) < 2u) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
                    goto label__resume__continue;
                  }
                  v_run_length = ((((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) & 127u) + 1u);
                  iop_a_src += 1u;
                  self->private_data.f_scratch[0u] = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                  iop_a_src += 1u;
                } else if (self->private_impl.f_src_bytes_per_pixel == 3u) {
                  if (((uint64_t)(io2_a_src - iop_a_src)) < 4u) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(6);
                    goto label__resume__continue;
                  }
                  v_run_length = ((((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) & 127u) + 1u);
                  iop_a_src += 1u;
                  self->private_data.f_scratch[0u] = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                  iop_a_src += 1u;
                  self->private_data.f_scratch[1u] = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                  iop_a_src += 1u;
                  self->private_data.f_scratch[2u] = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                  iop_a_src += 1u;
                } else {
                  if (((uint64_t)(io2_a_src - iop_a_src)) < 5u) {
                    status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(7);
                    goto label__resume__continue;
                  }
                  v_run_length = ((((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) & 127u) + 1u);
                  iop_a_src += 1u;
                  self->private_data.f_scratch[0u] = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                  iop_a_src += 1u;
                  self->private_data.f_scratch[1u] = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                  iop_a_src += 1u;
                  self->private_data.f_scratch[2u] = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                  iop_a_src += 1u;
                  self->private_data.f_scratch[3u] = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
                  iop_a_src += 1u;
                }
                if ((v_run_length + v_dst_x) > self->private_impl.f_width) {
                  status = wuffs_base__make_status(wuffs_targa__error__bad_run_length_encoding);
                  goto exit;
                }
              }
            }
          } else {
            if (v_lit_length > 0u) {
              if (((uint64_t)(io2_a_src - iop_a_src)) < 2u) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(8);
                goto label__resume__continue;
              }
              v_c32 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
              iop_a_src += 2u;
              v_c5 = (31u & (v_c32 >> 0u));
              self->private_data.f_scratch[0u] = ((uint8_t)(((v_c5 << 3u) | (v_c5 >> 2u))));
              v_c5 = (31u & (v_c32 >> 5u));
              self->private_data.f_scratch[1u] = ((uint8_t)(((v_c5 << 3u) | (v_c5 >> 2u))));
              v_c5 = (31u & (v_c32 >> 10u));
              self->private_data.f_scratch[2u] = ((uint8_t)(((v_c5 << 3u) | (v_c5 >> 2u))));
              self->private_data.f_scratch[3u] = 255u;
              wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, v_dst_palette, wuffs_base__make_slice_u8(self->private_data.f_scratch, 4));
              if (v_dst_bytes_per_pixel <= ((uint64_t)(v_dst.len))) {
                v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_dst_bytes_per_pixel);
              }
              v_dst_x += 1u;
              v_lit_length -= 1u;
            } else if (v_run_length > 0u) {
              v_run_length -= 1u;
              wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, v_dst_palette, wuffs_base__make_slice_u8(self->private_data.f_scratch, self->private_impl.f_scratch_bytes_per_pixel));
              if (v_dst_bytes_per_pixel <= ((uint64_t)(v_dst.len))) {
                v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_dst_bytes_per_pixel);
              }
              v_dst_x += 1u;
            } else {
              if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(9);
                goto label__resume__continue;
              }
              if (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) < 128u) {
                v_lit_length = (((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) + 1u);
                iop_a_src += 1u;
                if ((v_lit_length + v_dst_x) > self->private_impl.f_width) {
                  status = wuffs_base__make_status(wuffs_targa__error__bad_run_length_encoding);
                  goto exit;
                }
              } else {
                if (((uint64_t)(io2_a_src - iop_a_src)) < 3u) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10);
                  goto label__resume__continue;
                }
                v_run_length = ((((uint32_t)(wuffs_base__peek_u8be__no_bounds_check(iop_a_src))) & 127u) + 1u);
                iop_a_src += 1u;
                v_c32 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
                iop_a_src += 2u;
                v_c5 = (31u & (v_c32 >> 0u));
                self->private_data.f_scratch[0u] = ((uint8_t)(((v_c5 << 3u) | (v_c5 >> 2u))));
                v_c5 = (31u & (v_c32 >> 5u));
                self->private_data.f_scratch[1u] = ((uint8_t)(((v_c5 << 3u) | (v_c5 >> 2u))));
                v_c5 = (31u & (v_c32 >> 10u));
                self->private_data.f_scratch[2u] = ((uint8_t)(((v_c5 << 3u) | (v_c5 >> 2u))));
                self->private_data.f_scratch[3u] = 255u;
                if ((v_run_length + v_dst_x) > self->private_impl.f_width) {
                  status = wuffs_base__make_status(wuffs_targa__error__bad_run_length_encoding);
                  goto exit;
                }
              }
            }
          }
        }
        v_dst_x = 0u;
        if (((uint8_t)(self->private_impl.f_header_image_descriptor & 32u)) == 0u) {
          v_dst_y -= 1u;
        } else {
          v_dst_y += 1u;
        }
        if (((uint8_t)(self->private_impl.f_header_image_type & 8u)) == 0u) {
          v_lit_length = self->private_impl.f_width;
        }
      }
      break;
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_frame.v_dst_bytes_per_pixel = v_dst_bytes_per_pixel;
  self->private_data.s_do_decode_frame.v_dst_x = v_dst_x;
  self->private_data.s_do_decode_frame.v_dst_y = v_dst_y;
  self->private_data.s_do_decode_frame.v_mark = v_mark;
  self->private_data.s_do_decode_frame.v_num_pixels32 = v_num_pixels32;
  self->private_data.s_do_decode_frame.v_lit_length = v_lit_length;
  self->private_data.s_do_decode_frame.v_run_length = v_run_length;
  self->private_data.s_do_decode_frame.v_num_dst_bytes = v_num_dst_bytes;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func targa.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_targa__decoder__frame_dirty_rect(
    const wuffs_targa__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func targa.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_targa__decoder__num_animation_loops(
    const wuffs_targa__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func targa.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_targa__decoder__num_decoded_frame_configs(
    const wuffs_targa__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func targa.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_targa__decoder__num_decoded_frames(
    const wuffs_targa__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func targa.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__restart_frame(
    wuffs_targa__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if (a_index != 0u) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  self->private_impl.f_frame_config_io_position = a_io_position;
  return wuffs_base__make_status(NULL);
}

// -------- func targa.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_targa__decoder__set_report_metadata(
    wuffs_targa__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func targa.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_targa__decoder__tell_me_more(
    wuffs_targa__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func targa.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_targa__decoder__workbuf_len(
    const wuffs_targa__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__TARGA)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__THUMBHASH)

// ---------------- Status Codes Implementations

const char wuffs_thumbhash__error__bad_header[] = "#thumbhash: bad header";
const char wuffs_thumbhash__error__truncated_input[] = "#thumbhash: truncated input";

// ---------------- Private Consts

#define WUFFS_THUMBHASH__QUIRKS_BASE 1712283648u

static const uint8_t
WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 14u, 18u, 19u, 23u, 26u, 27u, 32u,
};

static const uint8_t
WUFFS_THUMBHASH__CUMULATIVE_DIMENSIONS[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 14u, 32u, 51u, 74u, 100u, 127u,
};

static const uint8_t
WUFFS_THUMBHASH__DIMENSION_CODES_FROM_HAS_ALPHA_AND_L_COUNT[2][8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  {
    23u, 23u, 23u, 23u, 39u, 71u, 103u, 119u,
  }, {
    55u, 55u, 55u, 55u, 87u, 119u, 118u, 116u,
  },
};

static const uint16_t
WUFFS_THUMBHASH__FROM_4_BITS_TO_PLUS_MINUS_1_00[16] WUFFS_BASE__POTENTIALLY_UNUSED = {
  49152u, 51337u, 53521u, 55706u, 57890u, 60075u, 62259u, 64444u,
  1092u, 3277u, 5461u, 7646u, 9830u, 12015u, 14199u, 16384u,
};

static const uint16_t
WUFFS_THUMBHASH__FROM_4_BITS_TO_PLUS_MINUS_1_25[16] WUFFS_BASE__POTENTIALLY_UNUSED = {
  45056u, 47787u, 50517u, 53248u, 55979u, 58709u, 61440u, 64171u,
  1365u, 4096u, 6827u, 9557u, 12288u, 15019u, 17749u, 20480u,
};

static const uint16_t
WUFFS_THUMBHASH__COSINES[159][6] WUFFS_BASE__POTENTIALLY_UNUSED = {
  {
    16281u, 15973u, 15465u, 14761u, 13873u, 12810u,
  }, {
    15465u, 12810u, 8717u, 3646u, 63702u, 58427u,
  }, {
    13873u, 7109u, 63702u, 55321u, 50071u, 49563u,
  }, {
    11585u, 0u, 53951u, 49152u, 53951u, 0u,
  }, {
    8717u, 58427u, 49255u, 55321u, 5411u, 15973u,
  }, {
    5411u, 52726u, 51663u, 3646u, 16281u, 7109u,
  }, {
    1834u, 49563u, 60125u, 14761u, 8717u, 52726u,
  }, {
    63702u, 49563u, 5411u, 14761u, 56819u, 52726u,
  },
  {
    60125u, 52726u, 13873u, 3646u, 49255u, 7109u,
  }, {
    56819u, 58427u, 16281u, 55321u, 60125u, 15973u,
  }, {
    53951u, 0u, 11585u, 49152u, 11585u, 0u,
  }, {
    51663u, 7109u, 1834u, 55321u, 15465u, 49563u,
  }, {
    50071u, 12810u, 56819u, 3646u, 1834u, 58427u,
  }, {
    49255u, 15973u, 50071u, 14761u, 51663u, 12810u,
  }, {
    16322u, 16135u, 15826u, 15396u, 14849u, 14189u,
  }, {
    15826u, 14189u, 11585u, 8192u, 4240u, 0u,
  },
  {
    14849u, 10531u, 4240u, 62691u, 56139u, 51347u,
  }, {
    13421u, 5604u, 61296u, 52985u, 49214u, 51347u,
  }, {
    11585u, 0u, 53951u, 49152u, 53951u, 0u,
  }, {
    9397u, 59932u, 49710u, 52985u, 1428u, 14189u,
  }, {
    6924u, 55005u, 49710u, 62691u, 13421u, 14189u,
  }, {
    4240u, 51347u, 53951u, 8192u, 15826u, 0u,
  }, {
    1428u, 49401u, 61296u, 15396u, 6924u, 51347u,
  }, {
    64108u, 49401u, 4240u, 15396u, 58612u, 51347u,
  },
  {
    61296u, 51347u, 11585u, 8192u, 49710u, 0u,
  }, {
    58612u, 55005u, 15826u, 62691u, 52115u, 14189u,
  }, {
    56139u, 59932u, 15826u, 52985u, 64108u, 14189u,
  }, {
    53951u, 0u, 11585u, 49152u, 11585u, 0u,
  }, {
    52115u, 5604u, 4240u, 52985u, 16322u, 51347u,
  }, {
    50687u, 10531u, 61296u, 62691u, 9397u, 51347u,
  }, {
    49710u, 14189u, 53951u, 8192u, 61296u, 0u,
  }, {
    49214u, 16135u, 49710u, 15396u, 50687u, 14189u,
  },
  {
    16328u, 16161u, 15883u, 15496u, 15004u, 14409u,
  }, {
    15883u, 14409u, 12054u, 8961u, 5320u, 1353u,
  }, {
    15004u, 11097u, 5320u, 64183u, 57738u, 52607u,
  }, {
    13716u, 6581u, 62839u, 54439u, 49653u, 50040u,
  }, {
    12054u, 1353u, 55473u, 49375u, 51820u, 61514u,
  }, {
    10063u, 61514u, 50532u, 51127u, 62839u, 11097u,
  }, {
    7798u, 56575u, 49208u, 58955u, 10063u, 16161u,
  }, {
    5320u, 52607u, 51820u, 4022u, 16328u, 6581u,
  },
  {
    2697u, 50040u, 57738u, 12929u, 12054u, 56575u,
  }, {
    0u, 49152u, 0u, 16384u, 0u, 49152u,
  }, {
    62839u, 50040u, 7798u, 12929u, 53482u, 56575u,
  }, {
    60216u, 52607u, 13716u, 4022u, 49208u, 6581u,
  }, {
    57738u, 56575u, 16328u, 58955u, 55473u, 16161u,
  }, {
    55473u, 61514u, 15004u, 51127u, 2697u, 11097u,
  }, {
    53482u, 1353u, 10063u, 49375u, 13716u, 61514u,
  }, {
    51820u, 6581u, 2697u, 54439u, 15883u, 50040u,
  },
  {
    50532u, 11097u, 60216u, 64183u, 7798u, 52607u,
  }, {
    49653u, 14409u, 53482u, 8961u, 60216u, 1353u,
  }, {
    49208u, 16161u, 49653u, 15496u, 50532u, 14409u,
  }, {
    16346u, 16231u, 16041u, 15776u, 15438u, 15028u,
  }, {
    16041u, 15028u, 13385u, 11183u, 8513u, 5487u,
  }, {
    15438u, 12709u, 8513u, 3333u, 63305u, 57998u,
  }, {
    14547u, 9448u, 2231u, 60049u, 53562u, 49760u,
  }, {
    13385u, 5487u, 61116u, 52827u, 49190u, 51537u,
  },
  {
    11974u, 1118u, 55196u, 49305u, 52151u, 62203u,
  }, {
    10340u, 62203u, 50989u, 50508u, 61116u, 9448u,
  }, {
    8513u, 57998u, 49190u, 56088u, 6527u, 16231u,
  }, {
    6527u, 54353u, 50098u, 64418u, 14547u, 12709u,
  }, {
    4420u, 51537u, 53562u, 7538u, 16041u, 1118u,
  }, {
    2231u, 49760u, 59009u, 13999u, 10340u, 54353u,
  }, {
    0u, 49152u, 0u, 16384u, 0u, 49152u,
  }, {
    63305u, 49760u, 6527u, 13999u, 55196u, 54353u,
  },
  {
    61116u, 51537u, 11974u, 7538u, 49495u, 1118u,
  }, {
    59009u, 54353u, 15438u, 64418u, 50989u, 12709u,
  }, {
    57023u, 57998u, 16346u, 56088u, 59009u, 16231u,
  }, {
    55196u, 62203u, 14547u, 50508u, 4420u, 9448u,
  }, {
    53562u, 1118u, 10340u, 49305u, 13385u, 62203u,
  }, {
    52151u, 5487u, 4420u, 52827u, 16346u, 51537u,
  }, {
    50989u, 9448u, 63305u, 60049u, 11974u, 49760u,
  }, {
    50098u, 12709u, 57023u, 3333u, 2231u, 57998u,
  },
  {
    49495u, 15028u, 52151u, 11183u, 57023u, 5487u,
  }, {
    49190u, 16231u, 49495u, 15776u, 50098u, 15028u,
  }, {
    16354u, 16265u, 16116u, 15908u, 15642u, 15319u,
  }, {
    16116u, 15319u, 14021u, 12264u, 10104u, 7614u,
  }, {
    15642u, 13484u, 10104u, 5810u, 989u, 61615u,
  }, {
    14941u, 10865u, 4874u, 63561u, 57060u, 52052u,
  }, {
    14021u, 7614u, 64547u, 56229u, 50595u, 49271u,
  }, {
    12897u, 3921u, 58812u, 51029u, 49420u, 54671u,
  },
  {
    11585u, 0u, 53951u, 49152u, 53951u, 0u,
  }, {
    10104u, 61615u, 50595u, 51029u, 62583u, 10865u,
  }, {
    8476u, 57922u, 49182u, 56229u, 6724u, 16265u,
  }, {
    6724u, 54671u, 49894u, 63561u, 14021u, 13484u,
  }, {
    4874u, 52052u, 52639u, 5810u, 16354u, 3921u,
  }, {
    2953u, 50217u, 57060u, 12264u, 12897u, 57922u,
  }, {
    989u, 49271u, 62583u, 15908u, 4874u, 50217u,
  }, {
    64547u, 49271u, 2953u, 15908u, 60662u, 50217u,
  },
  {
    62583u, 50217u, 8476u, 12264u, 52639u, 57922u,
  }, {
    60662u, 52052u, 12897u, 5810u, 49182u, 3921u,
  }, {
    58812u, 54671u, 15642u, 63561u, 51515u, 13484u,
  }, {
    57060u, 57922u, 16354u, 56229u, 58812u, 16265u,
  }, {
    55432u, 61615u, 14941u, 51029u, 2953u, 10865u,
  }, {
    53951u, 0u, 11585u, 49152u, 11585u, 0u,
  }, {
    52639u, 3921u, 6724u, 51029u, 16116u, 54671u,
  }, {
    51515u, 7614u, 989u, 56229u, 14941u, 49271u,
  },
  {
    50595u, 10865u, 60662u, 63561u, 8476u, 52052u,
  }, {
    49894u, 13484u, 55432u, 5810u, 64547u, 61615u,
  }, {
    49420u, 15319u, 51515u, 12264u, 55432u, 7614u,
  }, {
    49182u, 16265u, 49420u, 15908u, 49894u, 15319u,
  }, {
    16356u, 16273u, 16135u, 15942u, 15696u, 15396u,
  }, {
    16135u, 15396u, 14189u, 12551u, 10531u, 8192u,
  }, {
    15696u, 13689u, 10531u, 6489u, 1902u, 62691u,
  }, {
    15044u, 11243u, 5604u, 64583u, 58183u, 52985u,
  },
  {
    14189u, 8192u, 0u, 57344u, 51347u, 49152u,
  }, {
    13142u, 4699u, 59932u, 51847u, 49180u, 52985u,
  }, {
    11917u, 953u, 55005u, 49263u, 52394u, 62691u,
  }, {
    10531u, 62691u, 51347u, 50140u, 59932u, 8192u,
  }, {
    9003u, 59047u, 49401u, 54293u, 3778u, 15396u,
  }, {
    7353u, 55752u, 49401u, 60837u, 11917u, 15396u,
  }, {
    5604u, 52985u, 51347u, 2845u, 16135u, 8192u,
  }, {
    3778u, 50895u, 55005u, 9784u, 15044u, 62691u,
  },
  {
    1902u, 49594u, 59932u, 14641u, 9003u, 52985u,
  }, {
    0u, 49152u, 0u, 16384u, 0u, 49152u,
  }, {
    63634u, 49594u, 5604u, 14641u, 56533u, 52985u,
  }, {
    61758u, 50895u, 10531u, 9784u, 50492u, 62691u,
  }, {
    59932u, 52985u, 14189u, 2845u, 49401u, 8192u,
  }, {
    58183u, 55752u, 16135u, 60837u, 53619u, 15396u,
  }, {
    56533u, 59047u, 16135u, 54293u, 61758u, 15396u,
  }, {
    55005u, 62691u, 14189u, 50140u, 5604u, 8192u,
  },
  {
    53619u, 953u, 10531u, 49263u, 13142u, 62691u,
  }, {
    52394u, 4699u, 5604u, 51847u, 16356u, 52985u,
  }, {
    51347u, 8192u, 0u, 57344u, 14189u, 49152u,
  }, {
    50492u, 11243u, 59932u, 64583u, 7353u, 52985u,
  }, {
    49840u, 13689u, 55005u, 6489u, 63634u, 62691u,
  }, {
    49401u, 15396u, 51347u, 12551u, 55005u, 8192u,
  }, {
    49180u, 16273u, 49401u, 15942u, 49840u, 15396u,
  }, {
    16364u, 16305u, 16207u, 16069u, 15893u, 15679u,
  },
  {
    16207u, 15679u, 14811u, 13623u, 12140u, 10394u,
  }, {
    15893u, 14449u, 12140u, 9102u, 5520u, 1606u,
  }, {
    15426u, 12665u, 8423u, 3196u, 63132u, 57813u,
  }, {
    14811u, 10394u, 3981u, 62340u, 55776u, 51087u,
  }, {
    14053u, 7723u, 64732u, 56434u, 50725u, 49231u,
  }, {
    13160u, 4756u, 60016u, 51913u, 49172u, 52871u,
  }, {
    12140u, 1606u, 55776u, 49467u, 51483u, 60780u,
  }, {
    11003u, 63930u, 52376u, 49467u, 57113u, 4756u,
  },
  {
    9760u, 60780u, 50110u, 51913u, 64732u, 12665u,
  }, {
    8423u, 57813u, 49172u, 56434u, 7005u, 16305u,
  }, {
    7005u, 55142u, 49643u, 62340u, 13160u, 14449u,
  }, {
    5520u, 52871u, 51483u, 3196u, 16207u, 7723u,
  }, {
    3981u, 51087u, 54533u, 9102u, 15426u, 63930u,
  }, {
    2404u, 49857u, 58531u, 13623u, 11003u, 55142u,
  }, {
    804u, 49231u, 63132u, 16069u, 3981u, 49857u,
  }, {
    64732u, 49231u, 2404u, 16069u, 61555u, 49857u,
  },
  {
    63132u, 49857u, 7005u, 13623u, 54533u, 55142u,
  }, {
    61555u, 51087u, 11003u, 9102u, 50110u, 63930u,
  }, {
    60016u, 52871u, 14053u, 3196u, 49329u, 7723u,
  }, {
    58531u, 55142u, 15893u, 62340u, 52376u, 14449u,
  }, {
    57113u, 57813u, 16364u, 56434u, 58531u, 16305u,
  }, {
    55776u, 60780u, 15426u, 51913u, 804u, 12665u,
  }, {
    54533u, 63930u, 13160u, 49467u, 8423u, 4756u,
  }, {
    53396u, 1606u, 9760u, 49467u, 14053u, 60780u,
  },
  {
    52376u, 4756u, 5520u, 51913u, 16364u, 52871u,
  }, {
    51483u, 7723u, 804u, 56434u, 14811u, 49231u,
  }, {
    50725u, 10394u, 61555u, 62340u, 9760u, 51087u,
  }, {
    50110u, 12665u, 57113u, 3196u, 2404u, 57813u,
  }, {
    49643u, 14449u, 53396u, 9102u, 60016u, 1606u,
  }, {
    49329u, 15679u, 50725u, 13623u, 53396u, 10394u,
  }, {
    49172u, 16305u, 49329u, 16069u, 49643u, 15679u,
  },
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__do_decode_image_config(
    wuffs_thumbhash__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__do_decode_frame_config(
    wuffs_thumbhash__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__do_decode_frame(
    wuffs_thumbhash__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__from_src_to_coeffs(
    wuffs_thumbhash__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_thumbhash__decoder__from_coeffs_to_pixels(
    wuffs_thumbhash__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__from_pixels_to_dst(
    wuffs_thumbhash__decoder* self,
    wuffs_base__pixel_buffer* a_dst);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_thumbhash__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_thumbhash__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_thumbhash__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_thumbhash__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_thumbhash__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_thumbhash__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_thumbhash__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_thumbhash__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_thumbhash__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_thumbhash__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_thumbhash__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_thumbhash__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_thumbhash__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_thumbhash__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_thumbhash__decoder__initialize(
    wuffs_thumbhash__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_thumbhash__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_thumbhash__decoder*
wuffs_thumbhash__decoder__alloc(void) {
  wuffs_thumbhash__decoder* x =
      (wuffs_thumbhash__decoder*)(calloc(1, sizeof(wuffs_thumbhash__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_thumbhash__decoder__initialize(
      x, sizeof(wuffs_thumbhash__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_thumbhash__decoder(void) {
  return sizeof(wuffs_thumbhash__decoder);
}

// ---------------- Function Implementations

// -------- func thumbhash.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_thumbhash__decoder__get_quirk(
    const wuffs_thumbhash__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if ((a_key == 1712283648u) && self->private_impl.f_quirk_just_raw_thumbhash) {
    return 1u;
  }
  return 0u;
}

// -------- func thumbhash.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__set_quirk(
    wuffs_thumbhash__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (a_key == 1712283648u) {
    self->private_impl.f_quirk_just_raw_thumbhash = (a_value > 0u);
    return wuffs_base__make_status(NULL);
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func thumbhash.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__decode_image_config(
    wuffs_thumbhash__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_thumbhash__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_thumbhash__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func thumbhash.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__do_decode_image_config(
    wuffs_thumbhash__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_c32 = 0;
  uint8_t v_swap = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    if ( ! self->private_impl.f_quirk_just_raw_thumbhash) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        uint32_t t_0;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) {
          t_0 = ((uint32_t)(wuffs_base__peek_u24le__no_bounds_check(iop_a_src)));
          iop_a_src += 3;
        } else {
          self->private_data.s_do_decode_image_config.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
            uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
            if (num_bits_0 == 16) {
              t_0 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_0 += 8u;
            *scratch |= ((uint64_t)(num_bits_0)) << 56;
          }
        }
        v_c32 = t_0;
      }
      if (v_c32 != 16694979u) {
        status = wuffs_base__make_status(wuffs_thumbhash__error__bad_header);
        goto exit;
      }
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) {
        t_1 = ((uint32_t)(wuffs_base__peek_u24le__no_bounds_check(iop_a_src)));
        iop_a_src += 3;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 16) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      v_c32 = t_1;
    }
    self->private_impl.f_l_dc = (((uint64_t)(((v_c32 >> 0u) & 63u))) * 136339441844224u);
    self->private_impl.f_p_dc = ((uint64_t)((((uint64_t)(((v_c32 >> 6u) & 63u))) * 272678883688448u) - 8589384836186112u));
    self->private_impl.f_q_dc = ((uint64_t)((((uint64_t)(((v_c32 >> 12u) & 63u))) * 272678883688448u) - 8589384836186112u));
    self->private_impl.f_l_scale = ((uint8_t)(((v_c32 >> 18u) & 31u)));
    self->private_impl.f_has_alpha = ((uint8_t)(((v_c32 >> 23u) & 1u)));
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      uint32_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_2 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
          if (num_bits_2 == 8) {
            t_2 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2)) << 56;
        }
      }
      v_c32 = t_2;
    }
    self->private_impl.f_l_count = ((uint8_t)(((v_c32 >> 0u) & 7u)));
    self->private_impl.f_p_scale = ((uint8_t)(((v_c32 >> 3u) & 63u)));
    self->private_impl.f_q_scale = ((uint8_t)(((v_c32 >> 9u) & 63u)));
    self->private_impl.f_is_landscape = ((uint8_t)(((v_c32 >> 15u) & 1u)));
    self->private_impl.f_w_dimension_code = ((uint8_t)(((uint8_t)(WUFFS_THUMBHASH__DIMENSION_CODES_FROM_HAS_ALPHA_AND_L_COUNT[self->private_impl.f_has_alpha][self->private_impl.f_l_count] >> 4u)) & 7u));
    self->private_impl.f_h_dimension_code = ((uint8_t)(((uint8_t)(WUFFS_THUMBHASH__DIMENSION_CODES_FROM_HAS_ALPHA_AND_L_COUNT[self->private_impl.f_has_alpha][self->private_impl.f_l_count] >> 0u)) & 7u));
    if (self->private_impl.f_is_landscape != 0u) {
      v_swap = self->private_impl.f_w_dimension_code;
      self->private_impl.f_w_dimension_code = self->private_impl.f_h_dimension_code;
      self->private_impl.f_h_dimension_code = v_swap;
    }
    if (self->private_impl.f_is_landscape != 0u) {
      self->private_impl.f_lx = ((uint32_t)(((uint8_t)(7u - ((uint8_t)(2u * self->private_impl.f_has_alpha))))));
      self->private_impl.f_ly = ((uint32_t)(wuffs_base__u8__max(self->private_impl.f_l_count, 3u)));
    } else {
      self->private_impl.f_lx = ((uint32_t)(wuffs_base__u8__max(self->private_impl.f_l_count, 3u)));
      self->private_impl.f_ly = ((uint32_t)(((uint8_t)(7u - ((uint8_t)(2u * self->private_impl.f_has_alpha))))));
    }
    self->private_impl.f_frame_config_io_position = 8u;
    if (self->private_impl.f_has_alpha != 0u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint32_t t_3 = *iop_a_src++;
        v_c32 = t_3;
      }
      self->private_impl.f_a_dc = (((uint64_t)(((v_c32 >> 0u) & 15u))) << 42u);
      self->private_impl.f_a_scale = ((uint8_t)(((v_c32 >> 4u) & 15u)));
      self->private_impl.f_frame_config_io_position = 9u;
    }
    if (self->private_impl.f_quirk_just_raw_thumbhash) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
      self->private_impl.f_frame_config_io_position -= 3u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    }
    self->private_impl.f_pixfmt = 2415954056u;
    if (self->private_impl.f_has_alpha != 0u) {
      self->private_impl.f_pixfmt = 2164295816u;
    }
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          self->private_impl.f_pixfmt,
          0u,
          ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_w_dimension_code])),
          ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_h_dimension_code])),
          ((uint64_t)(self->private_impl.f_frame_config_io_position)),
          (self->private_impl.f_has_alpha == 0u));
    }
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func thumbhash.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__decode_frame_config(
    wuffs_thumbhash__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_thumbhash__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_thumbhash__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func thumbhash.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__do_decode_frame_config(
    wuffs_thumbhash__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_thumbhash__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (((uint64_t)(self->private_impl.f_frame_config_io_position)) != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_w_dimension_code])),
          ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_h_dimension_code]))),
          ((wuffs_base__flicks)(0u)),
          0u,
          ((uint64_t)(self->private_impl.f_frame_config_io_position)),
          0u,
          (self->private_impl.f_has_alpha == 0u),
          false,
          0u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func thumbhash.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__decode_frame(
    wuffs_thumbhash__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_thumbhash__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_thumbhash__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func thumbhash.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__do_decode_frame(
    wuffs_thumbhash__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_thumbhash__decoder__do_decode_frame_config(self, NULL, a_src);
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette(a_dst),
        wuffs_base__utility__make_pixel_format(self->private_impl.f_pixfmt),
        wuffs_base__utility__empty_slice_u8(),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
    status = wuffs_thumbhash__decoder__from_src_to_coeffs(self, a_src);
    if (status.repr) {
      goto suspend;
    }
    wuffs_thumbhash__decoder__from_coeffs_to_pixels(self);
    v_status = wuffs_thumbhash__decoder__from_pixels_to_dst(self, a_dst);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  return status;
}

// -------- func thumbhash.decoder.from_src_to_coeffs

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__from_src_to_coeffs(
    wuffs_thumbhash__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_cy = 0;
  uint32_t v_cx = 0;
  uint32_t v_i = 0;
  bool v_has_bits = false;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_from_src_to_coeffs;
  if (coro_susp_point) {
    v_cy = self->private_data.s_from_src_to_coeffs.v_cy;
    v_cx = self->private_data.s_from_src_to_coeffs.v_cx;
    v_i = self->private_data.s_from_src_to_coeffs.v_i;
    v_has_bits = self->private_data.s_from_src_to_coeffs.v_has_bits;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    v_i = 0u;
    v_cy = 0u;
    while (v_cy < self->private_impl.f_ly) {
      v_cx = 0u;
      if (v_cy == 0u) {
        v_cx = 1u;
      }
      while (((uint32_t)(v_cx * self->private_impl.f_ly)) < ((uint32_t)(self->private_impl.f_lx * ((uint32_t)(self->private_impl.f_ly - v_cy))))) {
        if (v_has_bits) {
          v_has_bits = false;
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          v_c8 >>= 4u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        } else {
          v_has_bits = true;
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_0 = *iop_a_src++;
            v_c8 = t_0;
          }
        }
        self->private_data.f_lac[(v_i & 31u)] = ((uint32_t)(((uint32_t)(((uint32_t)(self->private_impl.f_l_scale)) * 126u)) * wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__FROM_4_BITS_TO_PLUS_MINUS_1_00[((uint8_t)(v_c8 & 15u))])));
        v_i += 1u;
        v_cx += 1u;
      }
      v_cy += 1u;
    }
    v_i = 0u;
    v_cx = 0u;
    while (v_cx < 5u) {
      if (v_has_bits) {
        v_has_bits = false;
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_c8 >>= 4u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else {
        v_has_bits = true;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
      }
      self->private_data.f_pac[(v_i & 7u)] = ((uint32_t)(((uint32_t)(((uint32_t)(self->private_impl.f_p_scale)) * 62u)) * wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__FROM_4_BITS_TO_PLUS_MINUS_1_25[((uint8_t)(v_c8 & 15u))])));
      v_i += 1u;
      v_cx += 1u;
    }
    v_i = 0u;
    v_cx = 0u;
    while (v_cx < 5u) {
      if (v_has_bits) {
        v_has_bits = false;
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_c8 >>= 4u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else {
        v_has_bits = true;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          v_c8 = t_2;
        }
      }
      self->private_data.f_qac[(v_i & 7u)] = ((uint32_t)(((uint32_t)(((uint32_t)(self->private_impl.f_q_scale)) * 62u)) * wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__FROM_4_BITS_TO_PLUS_MINUS_1_25[((uint8_t)(v_c8 & 15u))])));
      v_i += 1u;
      v_cx += 1u;
    }
    if (self->private_impl.f_has_alpha == 0u) {
      status = wuffs_base__make_status(NULL);
      goto ok;
    }
    v_i = 0u;
    v_cx = 0u;
    while (v_cx < 14u) {
      if (v_has_bits) {
        v_has_bits = false;
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_c8 >>= 4u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else {
        v_has_bits = true;
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_3 = *iop_a_src++;
          v_c8 = t_3;
        }
      }
      self->private_data.f_aac[(v_i & 15u)] = ((uint32_t)(((uint32_t)(((uint32_t)(self->private_impl.f_a_scale)) * 2u)) * wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__FROM_4_BITS_TO_PLUS_MINUS_1_00[((uint8_t)(v_c8 & 15u))])));
      v_i += 1u;
      v_cx += 1u;
    }

    ok:
    self->private_impl.p_from_src_to_coeffs = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_from_src_to_coeffs = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_from_src_to_coeffs.v_cy = v_cy;
  self->private_data.s_from_src_to_coeffs.v_cx = v_cx;
  self->private_data.s_from_src_to_coeffs.v_i = v_i;
  self->private_data.s_from_src_to_coeffs.v_has_bits = v_has_bits;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func thumbhash.decoder.from_coeffs_to_pixels

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_thumbhash__decoder__from_coeffs_to_pixels(
    wuffs_thumbhash__decoder* self) {
  uint32_t v_h = 0;
  uint32_t v_w = 0;
  uint32_t v_fy[8] = {0};
  uint32_t v_fx[8] = {0};
  uint32_t v_cosines_base_y = 0;
  uint32_t v_cosines_base_x = 0;
  uint32_t v_y = 0;
  uint32_t v_x = 0;
  uint32_t v_f = 0;
  uint64_t v_l = 0;
  uint64_t v_p = 0;
  uint64_t v_q = 0;
  uint64_t v_b = 0;
  uint64_t v_g = 0;
  uint64_t v_r = 0;
  uint64_t v_a = 0;
  uint32_t v_i = 0;
  uint32_t v_cy = 0;
  uint32_t v_cx = 0;

  v_h = ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_h_dimension_code]));
  v_w = ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_w_dimension_code]));
  v_fy[0u] = 16384u;
  v_fx[0u] = 16384u;
  v_a = 255u;
  v_y = 0u;
  while (v_y < v_h) {
    v_cosines_base_y = ((uint32_t)(WUFFS_THUMBHASH__CUMULATIVE_DIMENSIONS[self->private_impl.f_h_dimension_code]));
    v_fy[1u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_y + v_y)][0u]);
    v_fy[2u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_y + v_y)][1u]);
    v_fy[3u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_y + v_y)][2u]);
    v_fy[4u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_y + v_y)][3u]);
    v_fy[5u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_y + v_y)][4u]);
    v_fy[6u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_y + v_y)][5u]);
    v_x = 0u;
    while (v_x < v_w) {
      v_cosines_base_x = ((uint32_t)(WUFFS_THUMBHASH__CUMULATIVE_DIMENSIONS[self->private_impl.f_w_dimension_code]));
      v_fx[1u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_x + v_x)][0u]);
      v_fx[2u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_x + v_x)][1u]);
      v_fx[3u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_x + v_x)][2u]);
      v_fx[4u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_x + v_x)][3u]);
      v_fx[5u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_x + v_x)][4u]);
      v_fx[6u] = wuffs_base__utility__sign_extend_convert_u16_u32(WUFFS_THUMBHASH__COSINES[(v_cosines_base_x + v_x)][5u]);
      v_l = self->private_impl.f_l_dc;
      v_i = 0u;
      v_cy = 0u;
      while (v_cy < self->private_impl.f_ly) {
        v_cx = 0u;
        if (v_cy == 0u) {
          v_cx = 1u;
        }
        while (((uint32_t)(v_cx * self->private_impl.f_ly)) < ((uint32_t)(self->private_impl.f_lx * ((uint32_t)(self->private_impl.f_ly - v_cy))))) {
          v_f = ((uint32_t)(v_fx[(v_cx & 7u)] * v_fy[(v_cy & 7u)]));
          v_l += ((uint64_t)(wuffs_base__utility__sign_extend_convert_u32_u64(v_f) * wuffs_base__utility__sign_extend_convert_u32_u64(self->private_data.f_lac[(v_i & 31u)])));
          v_i += 1u;
          v_cx += 1u;
        }
        v_cy += 1u;
      }
      v_p = self->private_impl.f_p_dc;
      v_q = self->private_impl.f_q_dc;
      v_i = 0u;
      v_cy = 0u;
      while (v_cy < 3u) {
        v_cx = 0u;
        if (v_cy == 0u) {
          v_cx = 1u;
        }
        while (v_cx < (3u - v_cy)) {
          v_f = ((uint32_t)(v_fx[v_cx] * v_fy[v_cy]));
          v_p += ((uint64_t)(wuffs_base__utility__sign_extend_convert_u32_u64(v_f) * wuffs_base__utility__sign_extend_convert_u32_u64(self->private_data.f_pac[(v_i & 7u)])));
          v_q += ((uint64_t)(wuffs_base__utility__sign_extend_convert_u32_u64(v_f) * wuffs_base__utility__sign_extend_convert_u32_u64(self->private_data.f_qac[(v_i & 7u)])));
          v_i += 1u;
          v_cx += 1u;
        }
        v_cy += 1u;
      }
      v_b = ((uint64_t)(v_l - wuffs_base__utility__i64_divide(((uint64_t)(2u * v_p)), 3u)));
      v_r = wuffs_base__utility__sign_extend_rshift_u64(((uint64_t)(((uint64_t)(((uint64_t)(3u * v_l)) + v_q)) - v_b)), 1u);
      v_g = ((uint64_t)(v_r - v_q));
      if ((v_b >> 63u) != 0u) {
        v_b = 0u;
      } else if (v_b >= 8589384836185950u) {
        v_b = 255u;
      } else {
        v_b /= 33683862102690u;
      }
      if ((v_g >> 63u) != 0u) {
        v_g = 0u;
      } else if (v_g >= 8589384836185950u) {
        v_g = 255u;
      } else {
        v_g /= 33683862102690u;
      }
      if ((v_r >> 63u) != 0u) {
        v_r = 0u;
      } else if (v_r >= 8589384836185950u) {
        v_r = 255u;
      } else {
        v_r /= 33683862102690u;
      }
      if (self->private_impl.f_has_alpha != 0u) {
        v_a = self->private_impl.f_a_dc;
        v_i = 0u;
        v_cy = 0u;
        while (v_cy < 5u) {
          v_cx = 0u;
          if (v_cy == 0u) {
            v_cx = 1u;
          }
          while (v_cx < (5u - v_cy)) {
            v_f = ((uint32_t)(v_fx[v_cx] * v_fy[v_cy]));
            v_a += ((uint64_t)(wuffs_base__utility__sign_extend_convert_u32_u64(v_f) * wuffs_base__utility__sign_extend_convert_u32_u64(self->private_data.f_aac[(v_i & 15u)])));
            v_i += 1u;
            v_cx += 1u;
          }
          v_cy += 1u;
        }
        if ((v_a >> 63u) != 0u) {
          v_a = 0u;
        } else if (v_a >= 65970697666500u) {
          v_a = 255u;
        } else {
          v_a /= 258708618300u;
        }
      }
      self->private_data.f_pixels[v_y][((4u * v_x) + 0u)] = ((uint8_t)(v_b));
      self->private_data.f_pixels[v_y][((4u * v_x) + 1u)] = ((uint8_t)(v_g));
      self->private_data.f_pixels[v_y][((4u * v_x) + 2u)] = ((uint8_t)(v_r));
      self->private_data.f_pixels[v_y][((4u * v_x) + 3u)] = ((uint8_t)(v_a));
      v_x += 1u;
    }
    v_y += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func thumbhash.decoder.from_pixels_to_dst

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_thumbhash__decoder__from_pixels_to_dst(
    wuffs_thumbhash__decoder* self,
    wuffs_base__pixel_buffer* a_dst) {
  uint32_t v_h = 0;
  uint32_t v_w = 0;
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  wuffs_base__table_u8 v_tab = {0};
  uint32_t v_y = 0;
  wuffs_base__slice_u8 v_dst = {0};
  wuffs_base__slice_u8 v_src = {0};

  v_h = ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_h_dimension_code]));
  v_w = ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_w_dimension_code]));
  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((v_w * v_dst_bytes_per_pixel)));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  while (v_y < v_h) {
    v_src = wuffs_base__make_slice_u8(self->private_data.f_pixels[v_y], (v_w * 4u));
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, v_y);
    if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
    }
    wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, wuffs_base__pixel_buffer__palette(a_dst), v_src);
    v_y += 1u;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func thumbhash.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_thumbhash__decoder__frame_dirty_rect(
    const wuffs_thumbhash__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_w_dimension_code])),
      ((uint32_t)(WUFFS_THUMBHASH__DIMENSIONS_FROM_DIMENSION_CODES[self->private_impl.f_h_dimension_code])));
}

// -------- func thumbhash.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_thumbhash__decoder__num_animation_loops(
    const wuffs_thumbhash__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func thumbhash.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_thumbhash__decoder__num_decoded_frame_configs(
    const wuffs_thumbhash__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func thumbhash.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_thumbhash__decoder__num_decoded_frames(
    const wuffs_thumbhash__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func thumbhash.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__restart_frame(
    wuffs_thumbhash__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if ((a_index != 0u) || (a_io_position != ((uint64_t)(self->private_impl.f_frame_config_io_position)))) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  return wuffs_base__make_status(NULL);
}

// -------- func thumbhash.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_thumbhash__decoder__set_report_metadata(
    wuffs_thumbhash__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func thumbhash.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_thumbhash__decoder__tell_me_more(
    wuffs_thumbhash__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func thumbhash.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_thumbhash__decoder__workbuf_len(
    const wuffs_thumbhash__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__THUMBHASH)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__VP8)

// ---------------- Status Codes Implementations

const char wuffs_vp8__error__bad_header[] = "#vp8: bad header";
const char wuffs_vp8__error__truncated_input[] = "#vp8: truncated input";
const char wuffs_vp8__error__unsupported_vp8_file[] = "#vp8: unsupported VP8 file";

// ---------------- Private Consts

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_vp8__decoder__do_decode_image_config(
    wuffs_vp8__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_vp8__decoder__do_decode_frame_config(
    wuffs_vp8__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_vp8__decoder__do_decode_frame(
    wuffs_vp8__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_vp8__decoder__make_a_placeholder_gradient(
    wuffs_vp8__decoder* self,
    wuffs_base__pixel_buffer* a_dst);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_vp8__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_vp8__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_vp8__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_vp8__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_vp8__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_vp8__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_vp8__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_vp8__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_vp8__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_vp8__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_vp8__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_vp8__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_vp8__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_vp8__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_vp8__decoder__initialize(
    wuffs_vp8__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_vp8__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_vp8__decoder*
wuffs_vp8__decoder__alloc(void) {
  wuffs_vp8__decoder* x =
      (wuffs_vp8__decoder*)(calloc(1, sizeof(wuffs_vp8__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_vp8__decoder__initialize(
      x, sizeof(wuffs_vp8__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_vp8__decoder(void) {
  return sizeof(wuffs_vp8__decoder);
}

// ---------------- Function Implementations

// -------- func vp8.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_vp8__decoder__get_quirk(
    const wuffs_vp8__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func vp8.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__set_quirk(
    wuffs_vp8__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func vp8.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__decode_image_config(
    wuffs_vp8__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_vp8__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_vp8__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func vp8.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_vp8__decoder__do_decode_image_config(
    wuffs_vp8__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_c32 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) {
        t_0 = ((uint32_t)(wuffs_base__peek_u24le__no_bounds_check(iop_a_src)));
        iop_a_src += 3;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 16) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_c32 = t_0;
    }
    if ((v_c32 & 1u) != 0u) {
      status = wuffs_base__make_status(wuffs_vp8__error__unsupported_vp8_file);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) {
        t_1 = ((uint32_t)(wuffs_base__peek_u24le__no_bounds_check(iop_a_src)));
        iop_a_src += 3;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 16) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      v_c32 = t_1;
    }
    if (v_c32 != 2752925u) {
      status = wuffs_base__make_status(wuffs_vp8__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      uint32_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_2 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
          if (num_bits_2 == 24) {
            t_2 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2)) << 56;
        }
      }
      v_c32 = t_2;
    }
    self->private_impl.f_width = (16383u & (v_c32 >> 0u));
    self->private_impl.f_height = (16383u & (v_c32 >> 16u));
    self->private_impl.f_frame_config_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          2415954056u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          self->private_impl.f_frame_config_io_position,
          false);
    }
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func vp8.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__decode_frame_config(
    wuffs_vp8__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_vp8__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_vp8__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func vp8.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_vp8__decoder__do_decode_frame_config(
    wuffs_vp8__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_vp8__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (self->private_impl.f_frame_config_io_position != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          self->private_impl.f_frame_config_io_position,
          0u,
          false,
          false,
          0u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func vp8.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__decode_frame(
    wuffs_vp8__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_vp8__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_vp8__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func vp8.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_vp8__decoder__do_decode_frame(
    wuffs_vp8__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_vp8__decoder__do_decode_frame_config(self, NULL, a_src);
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    self->private_impl.f_dst_x = 0u;
    self->private_impl.f_dst_y = 0u;
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette(a_dst),
        wuffs_base__utility__make_pixel_format(2415954056u),
        wuffs_base__utility__empty_slice_u8(),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    v_status = wuffs_vp8__decoder__make_a_placeholder_gradient(self, a_dst);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  return status;
}

// -------- func vp8.decoder.make_a_placeholder_gradient

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_vp8__decoder__make_a_placeholder_gradient(
    wuffs_vp8__decoder* self,
    wuffs_base__pixel_buffer* a_dst) {
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint64_t v_i = 0;
  uint8_t v_bgrx[4] = {0};

  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  v_bgrx[0u] = 128u;
  while (self->private_impl.f_dst_y < self->private_impl.f_height) {
    v_bgrx[1u] = ((uint8_t)(self->private_impl.f_dst_y));
    self->private_impl.f_dst_x = 0u;
    while (self->private_impl.f_dst_x < self->private_impl.f_width) {
      v_bgrx[2u] = ((uint8_t)(self->private_impl.f_dst_x));
      v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, self->private_impl.f_dst_y);
      if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
        v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
      }
      v_i = (((uint64_t)(self->private_impl.f_dst_x)) * ((uint64_t)(v_dst_bytes_per_pixel)));
      if (v_i < ((uint64_t)(v_dst.len))) {
        wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, wuffs_base__slice_u8__subslice_i(v_dst, v_i), wuffs_base__pixel_buffer__palette(a_dst), wuffs_base__make_slice_u8(v_bgrx, 4));
      }
      self->private_impl.f_dst_x += 1u;
    }
    self->private_impl.f_dst_y += 1u;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func vp8.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_vp8__decoder__frame_dirty_rect(
    const wuffs_vp8__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func vp8.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_vp8__decoder__num_animation_loops(
    const wuffs_vp8__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func vp8.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_vp8__decoder__num_decoded_frame_configs(
    const wuffs_vp8__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func vp8.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_vp8__decoder__num_decoded_frames(
    const wuffs_vp8__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func vp8.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__restart_frame(
    wuffs_vp8__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if ((a_index != 0u) || (a_io_position != self->private_impl.f_frame_config_io_position)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  return wuffs_base__make_status(NULL);
}

// -------- func vp8.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_vp8__decoder__set_report_metadata(
    wuffs_vp8__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func vp8.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_vp8__decoder__tell_me_more(
    wuffs_vp8__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func vp8.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_vp8__decoder__workbuf_len(
    const wuffs_vp8__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__VP8)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WBMP)

// ---------------- Status Codes Implementations

const char wuffs_wbmp__error__bad_header[] = "#wbmp: bad header";
const char wuffs_wbmp__error__truncated_input[] = "#wbmp: truncated input";

// ---------------- Private Consts

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_wbmp__decoder__do_decode_image_config(
    wuffs_wbmp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_wbmp__decoder__do_decode_frame_config(
    wuffs_wbmp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_wbmp__decoder__do_decode_frame(
    wuffs_wbmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_wbmp__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_wbmp__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_wbmp__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_wbmp__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_wbmp__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_wbmp__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_wbmp__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_wbmp__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_wbmp__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_wbmp__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_wbmp__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_wbmp__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_wbmp__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_wbmp__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_wbmp__decoder__initialize(
    wuffs_wbmp__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_wbmp__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_wbmp__decoder*
wuffs_wbmp__decoder__alloc(void) {
  wuffs_wbmp__decoder* x =
      (wuffs_wbmp__decoder*)(calloc(1, sizeof(wuffs_wbmp__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_wbmp__decoder__initialize(
      x, sizeof(wuffs_wbmp__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_wbmp__decoder(void) {
  return sizeof(wuffs_wbmp__decoder);
}

// ---------------- Function Implementations

// -------- func wbmp.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_wbmp__decoder__get_quirk(
    const wuffs_wbmp__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func wbmp.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__set_quirk(
    wuffs_wbmp__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func wbmp.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__decode_image_config(
    wuffs_wbmp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_wbmp__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_wbmp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func wbmp.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_wbmp__decoder__do_decode_image_config(
    wuffs_wbmp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_i = 0;
  uint32_t v_p = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  if (coro_susp_point) {
    v_i = self->private_data.s_do_decode_image_config.v_i;
    v_p = self->private_data.s_do_decode_image_config.v_p;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    v_i = 0u;
    while (v_i < 2u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      if (v_c8 != 0u) {
        status = wuffs_base__make_status(wuffs_wbmp__error__bad_header);
        goto exit;
      }
      v_i += 1u;
    }
    v_i = 0u;
    while (v_i < 2u) {
      v_p = 0u;
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
        v_p |= ((uint32_t)(((uint8_t)(v_c8 & 127u))));
        if (((uint8_t)(v_c8 >> 7u)) == 0u) {
          break;
        } else if (v_p > 131071u) {
          status = wuffs_base__make_status(wuffs_base__error__unsupported_image_dimension);
          goto exit;
        }
        v_p <<= 7u;
      }
      if (v_i == 0u) {
        self->private_impl.f_width = v_p;
      } else {
        self->private_impl.f_height = v_p;
      }
      v_i += 1u;
    }
    self->private_impl.f_frame_config_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
    if (a_dst != NULL) {
      wuffs_base__image_config__set(
          a_dst,
          2198077448u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          self->private_impl.f_frame_config_io_position,
          true);
    }
    self->private_impl.f_call_sequence = 32u;

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_image_config.v_i = v_i;
  self->private_data.s_do_decode_image_config.v_p = v_p;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func wbmp.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__decode_frame_config(
    wuffs_wbmp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_wbmp__decoder__do_decode_frame_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_wbmp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func wbmp.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_wbmp__decoder__do_decode_frame_config(
    wuffs_wbmp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_wbmp__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (self->private_impl.f_frame_config_io_position != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          self->private_impl.f_frame_config_io_position,
          0u,
          true,
          false,
          4278190080u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func wbmp.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__decode_frame(
    wuffs_wbmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_wbmp__decoder__do_decode_frame(self,
            a_dst,
            a_src,
            a_blend,
            a_workbuf,
            a_opts);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_wbmp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func wbmp.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_wbmp__decoder__do_decode_frame(
    wuffs_wbmp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint64_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_x_in_bytes = 0;
  uint32_t v_dst_x = 0;
  uint32_t v_dst_y = 0;
  wuffs_base__table_u8 v_tab = {0};
  wuffs_base__slice_u8 v_dst = {0};
  uint8_t v_src[1] = {0};
  uint8_t v_c8 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  if (coro_susp_point) {
    v_dst_bytes_per_pixel = self->private_data.s_do_decode_frame.v_dst_bytes_per_pixel;
    v_dst_x = self->private_data.s_do_decode_frame.v_dst_x;
    v_dst_y = self->private_data.s_do_decode_frame.v_dst_y;
    memcpy(v_src, self->private_data.s_do_decode_frame.v_src, sizeof(v_src));
    v_c8 = self->private_data.s_do_decode_frame.v_c8;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_wbmp__decoder__do_decode_frame_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
        wuffs_base__pixel_buffer__pixel_format(a_dst),
        wuffs_base__pixel_buffer__palette(a_dst),
        wuffs_base__utility__make_pixel_format(536870920u),
        wuffs_base__utility__empty_slice_u8(),
        a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
    v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
    if ((v_dst_bits_per_pixel & 7u) != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__unsupported_option);
      goto exit;
    }
    v_dst_bytes_per_pixel = ((uint64_t)((v_dst_bits_per_pixel / 8u)));
    if (self->private_impl.f_width > 0u) {
      v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
      while (v_dst_y < self->private_impl.f_height) {
        v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, v_dst_y);
        v_dst_x = 0u;
        while (v_dst_x < self->private_impl.f_width) {
          if ((v_dst_x & 7u) == 0u) {
            while (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
              v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
              v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, v_dst_y);
              v_dst_x_in_bytes = (((uint64_t)(v_dst_x)) * v_dst_bytes_per_pixel);
              if (v_dst_x_in_bytes <= ((uint64_t)(v_dst.len))) {
                v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_dst_x_in_bytes);
              }
            }
            v_c8 = wuffs_base__peek_u8be__no_bounds_check(iop_a_src);
            iop_a_src += 1u;
          }
          if (((uint8_t)(v_c8 & 128u)) == 0u) {
            v_src[0u] = 0u;
          } else {
            v_src[0u] = 255u;
          }
          v_c8 = ((uint8_t)((((uint32_t)(v_c8)) << 1u)));
          wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, wuffs_base__utility__empty_slice_u8(), wuffs_base__make_slice_u8(v_src, 1));
          if (v_dst_bytes_per_pixel <= ((uint64_t)(v_dst.len))) {
            v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_dst_bytes_per_pixel);
          }
          v_dst_x += 1u;
        }
        v_dst_y += 1u;
      }
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_frame.v_dst_bytes_per_pixel = v_dst_bytes_per_pixel;
  self->private_data.s_do_decode_frame.v_dst_x = v_dst_x;
  self->private_data.s_do_decode_frame.v_dst_y = v_dst_y;
  memcpy(self->private_data.s_do_decode_frame.v_src, v_src, sizeof(v_src));
  self->private_data.s_do_decode_frame.v_c8 = v_c8;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func wbmp.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_wbmp__decoder__frame_dirty_rect(
    const wuffs_wbmp__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func wbmp.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_wbmp__decoder__num_animation_loops(
    const wuffs_wbmp__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func wbmp.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_wbmp__decoder__num_decoded_frame_configs(
    const wuffs_wbmp__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func wbmp.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_wbmp__decoder__num_decoded_frames(
    const wuffs_wbmp__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func wbmp.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__restart_frame(
    wuffs_wbmp__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if (a_index != 0u) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  self->private_impl.f_frame_config_io_position = a_io_position;
  return wuffs_base__make_status(NULL);
}

// -------- func wbmp.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_wbmp__decoder__set_report_metadata(
    wuffs_wbmp__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func wbmp.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_wbmp__decoder__tell_me_more(
    wuffs_wbmp__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func wbmp.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_wbmp__decoder__workbuf_len(
    const wuffs_wbmp__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_base__utility__make_range_ii_u64(0u, 0u);
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WBMP)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WEBP)

// ---------------- Status Codes Implementations

const char wuffs_webp__error__bad_huffman_code_over_subscribed[] = "#webp: bad Huffman code (over-subscribed)";
const char wuffs_webp__error__bad_huffman_code_under_subscribed[] = "#webp: bad Huffman code (under-subscribed)";
const char wuffs_webp__error__bad_huffman_code[] = "#webp: bad Huffman code";
const char wuffs_webp__error__bad_back_reference[] = "#webp: bad back-reference";
const char wuffs_webp__error__bad_color_cache[] = "#webp: bad color cache";
const char wuffs_webp__error__bad_header[] = "#webp: bad header";
const char wuffs_webp__error__bad_transform[] = "#webp: bad transform";
const char wuffs_webp__error__short_chunk[] = "#webp: short chunk";
const char wuffs_webp__error__truncated_input[] = "#webp: truncated input";
const char wuffs_webp__error__unsupported_number_of_huffman_groups[] = "#webp: unsupported number of Huffman groups";
const char wuffs_webp__error__unsupported_transform_after_color_indexing_transform[] = "#webp: unsupported transform after color indexing transform";
const char wuffs_webp__error__unsupported_webp_file[] = "#webp: unsupported WebP file";
const char wuffs_webp__error__internal_error_inconsistent_huffman_code[] = "#webp: internal error: inconsistent Huffman code";
const char wuffs_webp__error__internal_error_inconsistent_dst_buffer[] = "#webp: internal error: inconsistent dst buffer";
const char wuffs_webp__error__internal_error_inconsistent_n_bits[] = "#webp: internal error: inconsistent n_bits";

// ---------------- Private Consts

static const uint8_t
WUFFS_WEBP__CODE_LENGTH_CODE_ORDER[19] WUFFS_BASE__POTENTIALLY_UNUSED = {
  17u, 18u, 0u, 1u, 2u, 3u, 4u, 5u,
  16u, 6u, 7u, 8u, 9u, 10u, 11u, 12u,
  13u, 14u, 15u,
};

static const uint8_t
WUFFS_WEBP__REPEAT_N_BITS[4] WUFFS_BASE__POTENTIALLY_UNUSED = {
  2u, 3u, 7u, 0u,
};

static const uint8_t
WUFFS_WEBP__REPEAT_COUNTS[4] WUFFS_BASE__POTENTIALLY_UNUSED = {
  3u, 3u, 11u, 0u,
};

static const uint16_t
WUFFS_WEBP__HUFFMAN_TABLE_BASE_OFFSETS[5] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1612u, 0u, 511u, 1022u, 1533u,
};

static const uint8_t
WUFFS_WEBP__DISTANCE_MAP[120] WUFFS_BASE__POTENTIALLY_UNUSED = {
  24u, 7u, 23u, 25u, 40u, 6u, 39u, 41u,
  22u, 26u, 38u, 42u, 56u, 5u, 55u, 57u,
  21u, 27u, 54u, 58u, 37u, 43u, 72u, 4u,
  71u, 73u, 20u, 28u, 53u, 59u, 70u, 74u,
  36u, 44u, 88u, 69u, 75u, 52u, 60u, 3u,
  87u, 89u, 19u, 29u, 86u, 90u, 35u, 45u,
  68u, 76u, 85u, 91u, 51u, 61u, 104u, 2u,
  103u, 105u, 18u, 30u, 102u, 106u, 34u, 46u,
  84u, 92u, 67u, 77u, 101u, 107u, 50u, 62u,
  120u, 1u, 119u, 121u, 83u, 93u, 17u, 31u,
  100u, 108u, 66u, 78u, 118u, 122u, 33u, 47u,
  117u, 123u, 49u, 63u, 99u, 109u, 82u, 94u,
  0u, 116u, 124u, 65u, 79u, 16u, 32u, 98u,
  110u, 48u, 115u, 125u, 81u, 95u, 64u, 114u,
  126u, 97u, 111u, 80u, 113u, 127u, 96u, 112u,
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_huffman_groups(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_n_huffman_groups);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_huffman_tree(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_hg,
    uint32_t a_ht);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_huffman_tree_simple(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_hg,
    uint32_t a_ht);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_code_length_code_lengths(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__build_code_lengths_huffman_nodes(
    wuffs_webp__decoder* self);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__build_huffman_nodes(
    wuffs_webp__decoder* self,
    uint32_t a_hg,
    uint32_t a_ht);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__build_code_lengths(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_pixels_slow(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_dst,
    wuffs_base__io_buffer* a_src,
    uint32_t a_width,
    uint32_t a_height,
    wuffs_base__slice_u8 a_tile_data,
    uint32_t a_tile_size_log2);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_webp__decoder__apply_transform_predictor(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_pix,
    wuffs_base__slice_u8 a_tile_data);

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_webp__decoder__absolute_difference(
    const wuffs_webp__decoder* self,
    uint32_t a_a,
    uint32_t a_b);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_webp__decoder__mode12(
    const wuffs_webp__decoder* self,
    uint8_t a_l,
    uint8_t a_t,
    uint8_t a_tl);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_webp__decoder__mode13(
    const wuffs_webp__decoder* self,
    uint8_t a_l,
    uint8_t a_t,
    uint8_t a_tl);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_webp__decoder__apply_transform_cross_color(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_pix,
    wuffs_base__slice_u8 a_tile_data);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_webp__decoder__apply_transform_subtract_green(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_pix);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_webp__decoder__apply_transform_color_indexing(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_pix);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_image_config(
    wuffs_webp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_image_config_limited(
    wuffs_webp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_image_config_limited_vp8l(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_frame_config(
    wuffs_webp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_frame(
    wuffs_webp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_transform(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_color_cache_parameters(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_hg_table(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_width,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_pixels(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_dst,
    wuffs_base__io_buffer* a_src,
    uint32_t a_width,
    uint32_t a_height,
    wuffs_base__slice_u8 a_tile_data,
    uint32_t a_tile_size_log2);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__swizzle(
    wuffs_webp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_src,
    wuffs_base__pixel_blend a_blend);

// ---------------- VTables

const wuffs_base__image_decoder__func_ptrs
wuffs_webp__decoder__func_ptrs_for__wuffs_base__image_decoder = {
  (wuffs_base__status(*)(void*,
      wuffs_base__pixel_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__pixel_blend,
      wuffs_base__slice_u8,
      wuffs_base__decode_frame_options*))(&wuffs_webp__decoder__decode_frame),
  (wuffs_base__status(*)(void*,
      wuffs_base__frame_config*,
      wuffs_base__io_buffer*))(&wuffs_webp__decoder__decode_frame_config),
  (wuffs_base__status(*)(void*,
      wuffs_base__image_config*,
      wuffs_base__io_buffer*))(&wuffs_webp__decoder__decode_image_config),
  (wuffs_base__rect_ie_u32(*)(const void*))(&wuffs_webp__decoder__frame_dirty_rect),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_webp__decoder__get_quirk),
  (uint32_t(*)(const void*))(&wuffs_webp__decoder__num_animation_loops),
  (uint64_t(*)(const void*))(&wuffs_webp__decoder__num_decoded_frame_configs),
  (uint64_t(*)(const void*))(&wuffs_webp__decoder__num_decoded_frames),
  (wuffs_base__status(*)(void*,
      uint64_t,
      uint64_t))(&wuffs_webp__decoder__restart_frame),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_webp__decoder__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      uint32_t,
      bool))(&wuffs_webp__decoder__set_report_metadata),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__more_information*,
      wuffs_base__io_buffer*))(&wuffs_webp__decoder__tell_me_more),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_webp__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_webp__decoder__initialize(
    wuffs_webp__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  {
    wuffs_base__status z = wuffs_vp8__decoder__initialize(
        &self->private_data.f_vp8, sizeof(self->private_data.f_vp8), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__image_decoder.vtable_name =
      wuffs_base__image_decoder__vtable_name;
  self->private_impl.vtable_for__wuffs_base__image_decoder.function_pointers =
      (const void*)(&wuffs_webp__decoder__func_ptrs_for__wuffs_base__image_decoder);
  return wuffs_base__make_status(NULL);
}

wuffs_webp__decoder*
wuffs_webp__decoder__alloc(void) {
  wuffs_webp__decoder* x =
      (wuffs_webp__decoder*)(calloc(1, sizeof(wuffs_webp__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_webp__decoder__initialize(
      x, sizeof(wuffs_webp__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_webp__decoder(void) {
  return sizeof(wuffs_webp__decoder);
}

// ---------------- Function Implementations

// -------- func webp.decoder.decode_huffman_groups

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_huffman_groups(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_n_huffman_groups) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_hg = 0;
  uint32_t v_ht = 0;

  uint32_t coro_susp_point = self->private_impl.p_decode_huffman_groups;
  if (coro_susp_point) {
    v_hg = self->private_data.s_decode_huffman_groups.v_hg;
    v_ht = self->private_data.s_decode_huffman_groups.v_ht;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    v_hg = 0u;
    while (v_hg < a_n_huffman_groups) {
      v_ht = 0u;
      while (v_ht < 5u) {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        status = wuffs_webp__decoder__decode_huffman_tree(self, a_src, v_hg, v_ht);
        if (status.repr) {
          goto suspend;
        }
        v_ht += 1u;
      }
      v_hg += 1u;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_huffman_groups = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_huffman_groups = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_huffman_groups.v_hg = v_hg;
  self->private_data.s_decode_huffman_groups.v_ht = v_ht;

  goto exit;
  exit:
  return status;
}

// -------- func webp.decoder.decode_huffman_tree

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_huffman_tree(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_hg,
    uint32_t a_ht) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_use_simple = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_huffman_tree;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (a_ht >= 4u) {
      self->private_impl.f_ht_n_symbols = 40u;
    } else if (a_ht > 0u) {
      self->private_impl.f_ht_n_symbols = 256u;
    } else if (self->private_impl.f_color_cache_bits == 0u) {
      self->private_impl.f_ht_n_symbols = 280u;
    } else {
      self->private_impl.f_ht_n_symbols = (280u + (((uint32_t)(1u)) << self->private_impl.f_color_cache_bits));
    }
    if (self->private_impl.f_n_bits < 1u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      self->private_impl.f_bits = ((uint32_t)(v_c8));
      self->private_impl.f_n_bits = 8u;
    }
    v_use_simple = (self->private_impl.f_bits & 1u);
    self->private_impl.f_bits >>= 1u;
    self->private_impl.f_n_bits -= 1u;
    if (v_use_simple != 0u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      status = wuffs_webp__decoder__decode_huffman_tree_simple(self, a_src, a_hg, a_ht);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      status = wuffs_webp__decoder__decode_code_length_code_lengths(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      v_status = wuffs_webp__decoder__build_code_lengths_huffman_nodes(self);
      if ( ! wuffs_base__status__is_ok(&v_status)) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      }
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      status = wuffs_webp__decoder__build_code_lengths(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      v_status = wuffs_webp__decoder__build_huffman_nodes(self, a_hg, a_ht);
      if ( ! wuffs_base__status__is_ok(&v_status)) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      }
    }

    ok:
    self->private_impl.p_decode_huffman_tree = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_huffman_tree = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.decode_huffman_tree_simple

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_huffman_tree_simple(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_hg,
    uint32_t a_ht) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_use_second_symbol = 0;
  uint32_t v_first_symbol_n_bits = 0;
  uint32_t v_symbol0 = 0;
  uint32_t v_symbol1 = 0;
  uint32_t v_base_offset = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_huffman_tree_simple;
  if (coro_susp_point) {
    v_use_second_symbol = self->private_data.s_decode_huffman_tree_simple.v_use_second_symbol;
    v_first_symbol_n_bits = self->private_data.s_decode_huffman_tree_simple.v_first_symbol_n_bits;
    v_symbol0 = self->private_data.s_decode_huffman_tree_simple.v_symbol0;
    v_base_offset = self->private_data.s_decode_huffman_tree_simple.v_base_offset;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_n_bits < 2u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      if (self->private_impl.f_n_bits >= 2u) {
        status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
        goto exit;
      }
      self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
      self->private_impl.f_n_bits += 8u;
    }
    v_use_second_symbol = (self->private_impl.f_bits & 1u);
    v_first_symbol_n_bits = ((((self->private_impl.f_bits & 2u) >> 1u) * 7u) + 1u);
    self->private_impl.f_bits >>= 2u;
    self->private_impl.f_n_bits -= 2u;
    if (self->private_impl.f_n_bits < v_first_symbol_n_bits) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_1 = *iop_a_src++;
        v_c8 = t_1;
      }
      if (self->private_impl.f_n_bits >= v_first_symbol_n_bits) {
        status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
        goto exit;
      }
      self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
      self->private_impl.f_n_bits += 8u;
    }
    v_symbol0 = (self->private_impl.f_bits & ((((uint32_t)(1u)) << v_first_symbol_n_bits) - 1u));
    self->private_impl.f_bits >>= v_first_symbol_n_bits;
    self->private_impl.f_n_bits -= v_first_symbol_n_bits;
    v_base_offset = ((uint32_t)(WUFFS_WEBP__HUFFMAN_TABLE_BASE_OFFSETS[a_ht]));
    if (v_use_second_symbol != 0u) {
      if (self->private_impl.f_n_bits < 8u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          v_c8 = t_2;
        }
        if (self->private_impl.f_n_bits >= 8u) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
          goto exit;
        }
        self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
        self->private_impl.f_n_bits += 8u;
      }
      v_symbol1 = (self->private_impl.f_bits & 255u);
      self->private_impl.f_bits >>= 8u;
      self->private_impl.f_n_bits -= 8u;
      self->private_data.f_huffman_nodes[a_hg][(v_base_offset + 0u)] = ((uint16_t)((v_base_offset + 1u)));
      self->private_data.f_huffman_nodes[a_hg][(v_base_offset + 1u)] = ((uint16_t)((v_symbol0 | 32768u)));
      self->private_data.f_huffman_nodes[a_hg][(v_base_offset + 2u)] = ((uint16_t)((v_symbol1 | 32768u)));
    } else {
      self->private_data.f_huffman_nodes[a_hg][v_base_offset] = ((uint16_t)((v_symbol0 | 32768u)));
    }

    goto ok;
    ok:
    self->private_impl.p_decode_huffman_tree_simple = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_huffman_tree_simple = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_huffman_tree_simple.v_use_second_symbol = v_use_second_symbol;
  self->private_data.s_decode_huffman_tree_simple.v_first_symbol_n_bits = v_first_symbol_n_bits;
  self->private_data.s_decode_huffman_tree_simple.v_symbol0 = v_symbol0;
  self->private_data.s_decode_huffman_tree_simple.v_base_offset = v_base_offset;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.decode_code_length_code_lengths

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_code_length_code_lengths(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_n_codes = 0;
  uint32_t v_i = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_code_length_code_lengths;
  if (coro_susp_point) {
    v_n_codes = self->private_data.s_decode_code_length_code_lengths.v_n_codes;
    v_i = self->private_data.s_decode_code_length_code_lengths.v_i;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_n_bits < 4u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      if (self->private_impl.f_n_bits >= 4u) {
        status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
        goto exit;
      }
      self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
      self->private_impl.f_n_bits += 8u;
    }
    v_n_codes = ((self->private_impl.f_bits & 15u) + 4u);
    self->private_impl.f_bits >>= 4u;
    self->private_impl.f_n_bits -= 4u;
    v_i = 0u;
    while (v_i < v_n_codes) {
      if (self->private_impl.f_n_bits < 3u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
        if (self->private_impl.f_n_bits >= 3u) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
          goto exit;
        }
        self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
        self->private_impl.f_n_bits += 8u;
      }
      self->private_impl.f_code_length_code_lengths[WUFFS_WEBP__CODE_LENGTH_CODE_ORDER[v_i]] = ((uint8_t)((self->private_impl.f_bits & 7u)));
      self->private_impl.f_bits >>= 3u;
      self->private_impl.f_n_bits -= 3u;
      v_i += 1u;
    }
    while (v_i < 19u) {
      self->private_impl.f_code_length_code_lengths[WUFFS_WEBP__CODE_LENGTH_CODE_ORDER[v_i]] = 0u;
      v_i += 1u;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_code_length_code_lengths = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_code_length_code_lengths = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_code_length_code_lengths.v_n_codes = v_n_codes;
  self->private_data.s_decode_code_length_code_lengths.v_i = v_i;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.build_code_lengths_huffman_nodes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__build_code_lengths_huffman_nodes(
    wuffs_webp__decoder* self) {
  uint32_t v_code_bits = 0;
  uint32_t v_code_len = 0;
  uint32_t v_symbol = 0;
  uint32_t v_histogram[8] = {0};
  uint32_t v_n_used_symbols = 0;
  uint32_t v_last_used_symbol = 0;
  uint32_t v_subscription_weight = 0;
  uint32_t v_subscription_total = 0;
  uint32_t v_curr_code = 0;
  uint32_t v_next_codes[9] = {0};
  uint32_t v_n_branches = 0;
  uint32_t v_h = 0;
  uint32_t v_children = 0;
  uint16_t v_node = 0;

  v_symbol = 0u;
  while (v_symbol < 19u) {
    v_code_len = ((uint32_t)(self->private_impl.f_code_length_code_lengths[v_symbol]));
    if (v_code_len != 0u) {
      v_histogram[v_code_len] += 1u;
      v_n_used_symbols += 1u;
      v_last_used_symbol = v_symbol;
    }
    v_symbol += 1u;
  }
  if (v_n_used_symbols < 1u) {
    return wuffs_base__make_status(wuffs_webp__error__bad_huffman_code);
  } else if (v_n_used_symbols == 1u) {
    self->private_data.f_code_lengths_huffman_nodes[0u] = ((uint16_t)((v_last_used_symbol | 32768u)));
    return wuffs_base__make_status(NULL);
  }
  v_subscription_weight = 16384u;
  v_code_len = 1u;
  while (true) {
    v_curr_code = ((uint32_t)(((uint32_t)(v_curr_code + v_histogram[v_code_len])) << 1u));
    v_next_codes[(v_code_len + 1u)] = v_curr_code;
    v_subscription_total += ((uint32_t)(v_subscription_weight * v_histogram[v_code_len]));
    v_subscription_weight >>= 1u;
    if (v_code_len >= 7u) {
      break;
    }
    v_code_len += 1u;
  }
  if (v_subscription_total > 32768u) {
    return wuffs_base__make_status(wuffs_webp__error__bad_huffman_code_over_subscribed);
  } else if (v_subscription_total < 32768u) {
    return wuffs_base__make_status(wuffs_webp__error__bad_huffman_code_under_subscribed);
  }
  self->private_data.f_code_lengths_huffman_nodes[0u] = 0u;
  v_symbol = 0u;
  while (v_symbol < 19u) {
    v_code_len = ((uint32_t)(self->private_impl.f_code_length_code_lengths[v_symbol]));
    if (v_code_len > 0u) {
      v_code_bits = v_next_codes[v_code_len];
      v_next_codes[v_code_len] += 1u;
      v_code_bits <<= (32u - v_code_len);
      v_h = 0u;
      while (v_code_len > 0u) {
        v_node = self->private_data.f_code_lengths_huffman_nodes[v_h];
        if (v_node == 0u) {
          v_children = ((uint32_t)(1u + ((uint32_t)(2u * v_n_branches))));
          v_children = wuffs_base__u32__min(v_children, 35u);
          self->private_data.f_code_lengths_huffman_nodes[v_h] = ((uint16_t)(v_children));
          self->private_data.f_code_lengths_huffman_nodes[(v_children + 0u)] = 0u;
          self->private_data.f_code_lengths_huffman_nodes[(v_children + 1u)] = 0u;
          v_h = (v_children + (v_code_bits >> 31u));
          v_n_branches += 1u;
        } else {
          v_children = ((uint32_t)(v_node));
          v_h = (wuffs_base__u32__min(v_children, 35u) + (v_code_bits >> 31u));
        }
        v_code_bits <<= 1u;
        v_code_len -= 1u;
      }
      self->private_data.f_code_lengths_huffman_nodes[v_h] = ((uint16_t)((v_symbol | 32768u)));
    }
    v_symbol += 1u;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func webp.decoder.build_huffman_nodes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__build_huffman_nodes(
    wuffs_webp__decoder* self,
    uint32_t a_hg,
    uint32_t a_ht) {
  uint32_t v_base_offset = 0;
  uint32_t v_code_bits = 0;
  uint32_t v_code_len = 0;
  uint32_t v_symbol = 0;
  uint32_t v_histogram[16] = {0};
  uint32_t v_n_used_symbols = 0;
  uint32_t v_last_used_symbol = 0;
  uint32_t v_subscription_weight = 0;
  uint32_t v_subscription_total = 0;
  uint32_t v_curr_code = 0;
  uint32_t v_next_codes[17] = {0};
  uint32_t v_n_branches = 0;
  uint32_t v_h = 0;
  uint32_t v_children = 0;
  uint16_t v_node = 0;

  v_base_offset = ((uint32_t)(WUFFS_WEBP__HUFFMAN_TABLE_BASE_OFFSETS[a_ht]));
  v_symbol = 0u;
  while (v_symbol < self->private_impl.f_ht_n_symbols) {
    v_code_len = ((uint32_t)(((uint16_t)(self->private_data.f_code_lengths[v_symbol] & 15u))));
    if (v_code_len != 0u) {
      v_histogram[v_code_len] += 1u;
      v_n_used_symbols += 1u;
      v_last_used_symbol = v_symbol;
    }
    v_symbol += 1u;
  }
  if (v_n_used_symbols < 1u) {
    return wuffs_base__make_status(wuffs_webp__error__bad_huffman_code);
  } else if (v_n_used_symbols == 1u) {
    self->private_data.f_huffman_nodes[a_hg][v_base_offset] = ((uint16_t)((v_last_used_symbol | 32768u)));
    return wuffs_base__make_status(NULL);
  }
  v_subscription_weight = 16384u;
  v_code_len = 1u;
  while (true) {
    v_curr_code = ((uint32_t)(((uint32_t)(v_curr_code + v_histogram[v_code_len])) << 1u));
    v_next_codes[(v_code_len + 1u)] = v_curr_code;
    v_subscription_total += ((uint32_t)(v_subscription_weight * v_histogram[v_code_len]));
    v_subscription_weight >>= 1u;
    if (v_code_len >= 15u) {
      break;
    }
    v_code_len += 1u;
  }
  if (v_subscription_total > 32768u) {
    return wuffs_base__make_status(wuffs_webp__error__bad_huffman_code_over_subscribed);
  } else if (v_subscription_total < 32768u) {
    return wuffs_base__make_status(wuffs_webp__error__bad_huffman_code_under_subscribed);
  }
  self->private_data.f_huffman_nodes[a_hg][v_base_offset] = 0u;
  v_symbol = 0u;
  while (v_symbol < self->private_impl.f_ht_n_symbols) {
    v_code_len = ((uint32_t)(((uint16_t)(self->private_data.f_code_lengths[v_symbol] & 15u))));
    if (v_code_len != 0u) {
      v_code_bits = v_next_codes[v_code_len];
      v_next_codes[v_code_len] += 1u;
      v_code_bits <<= (32u - v_code_len);
      v_h = v_base_offset;
      while (v_code_len > 0u) {
        v_node = self->private_data.f_huffman_nodes[a_hg][v_h];
        if (v_node == 0u) {
          v_children = ((uint32_t)(v_base_offset + ((uint32_t)(1u + ((uint32_t)(2u * v_n_branches))))));
          v_children = wuffs_base__u32__min(v_children, 6265u);
          self->private_data.f_huffman_nodes[a_hg][v_h] = ((uint16_t)(v_children));
          self->private_data.f_huffman_nodes[a_hg][(v_children + 0u)] = 0u;
          self->private_data.f_huffman_nodes[a_hg][(v_children + 1u)] = 0u;
          v_h = (v_children + (v_code_bits >> 31u));
          v_n_branches += 1u;
        } else {
          v_children = ((uint32_t)(v_node));
          v_h = (wuffs_base__u32__min(v_children, 6265u) + (v_code_bits >> 31u));
        }
        v_code_bits <<= 1u;
        v_code_len -= 1u;
      }
      self->private_data.f_huffman_nodes[a_hg][v_h] = ((uint16_t)((v_symbol | 32768u)));
    }
    v_symbol += 1u;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func webp.decoder.build_code_lengths

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__build_code_lengths(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_use_length = 0;
  uint32_t v_length_n_bits = 0;
  uint32_t v_length = 0;
  uint16_t v_prev_code_length = 0;
  uint32_t v_h = 0;
  uint32_t v_s = 0;
  uint32_t v_s_max = 0;
  uint16_t v_node = 0;
  uint32_t v_symbol = 0;
  uint16_t v_repeat_value = 0;
  uint32_t v_repeat_n_bits = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_build_code_lengths;
  if (coro_susp_point) {
    v_length_n_bits = self->private_data.s_build_code_lengths.v_length_n_bits;
    v_prev_code_length = self->private_data.s_build_code_lengths.v_prev_code_length;
    v_s = self->private_data.s_build_code_lengths.v_s;
    v_s_max = self->private_data.s_build_code_lengths.v_s_max;
    v_node = self->private_data.s_build_code_lengths.v_node;
    v_repeat_value = self->private_data.s_build_code_lengths.v_repeat_value;
    v_repeat_n_bits = self->private_data.s_build_code_lengths.v_repeat_n_bits;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_n_bits < 1u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      self->private_impl.f_bits = ((uint32_t)(v_c8));
      self->private_impl.f_n_bits = 8u;
    }
    v_use_length = (self->private_impl.f_bits & 1u);
    self->private_impl.f_bits >>= 1u;
    self->private_impl.f_n_bits -= 1u;
    self->private_impl.f_ht_code_lengths_remaining = self->private_impl.f_ht_n_symbols;
    if (v_use_length != 0u) {
      if (self->private_impl.f_n_bits < 3u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
        if (self->private_impl.f_n_bits >= 3u) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
          goto exit;
        }
        self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
        self->private_impl.f_n_bits += 8u;
      }
      v_length_n_bits = (((self->private_impl.f_bits & 7u) * 2u) + 2u);
      self->private_impl.f_bits >>= 3u;
      self->private_impl.f_n_bits -= 3u;
      while (self->private_impl.f_n_bits < v_length_n_bits) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          v_c8 = t_2;
        }
        if (self->private_impl.f_n_bits >= v_length_n_bits) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
          goto exit;
        }
        self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
        self->private_impl.f_n_bits += 8u;
      }
      v_length = ((self->private_impl.f_bits & ((((uint32_t)(1u)) << v_length_n_bits) - 1u)) + 2u);
      self->private_impl.f_bits >>= v_length_n_bits;
      self->private_impl.f_n_bits -= v_length_n_bits;
      if (v_length > self->private_impl.f_ht_n_symbols) {
        status = wuffs_base__make_status(wuffs_webp__error__bad_huffman_code);
        goto exit;
      }
      self->private_impl.f_ht_code_lengths_remaining = v_length;
    }
    v_prev_code_length = 8u;
    while (v_s < self->private_impl.f_ht_n_symbols) {
      if (self->private_impl.f_ht_code_lengths_remaining <= 0u) {
        while (v_s < self->private_impl.f_ht_n_symbols) {
          self->private_data.f_code_lengths[v_s] = 0u;
          v_s += 1u;
        }
        break;
      }
      self->private_impl.f_ht_code_lengths_remaining -= 1u;
      v_h = 0u;
      while (true) {
        v_node = self->private_data.f_code_lengths_huffman_nodes[v_h];
        if (v_node >= 32768u) {
          break;
        } else if (v_node > 35u) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_huffman_code);
          goto exit;
        }
        if (self->private_impl.f_n_bits < 1u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_3 = *iop_a_src++;
            v_c8 = t_3;
          }
          self->private_impl.f_bits = ((uint32_t)(v_c8));
          self->private_impl.f_n_bits = 8u;
        }
        v_h = (((uint32_t)(v_node)) + (self->private_impl.f_bits & 1u));
        self->private_impl.f_bits >>= 1u;
        self->private_impl.f_n_bits -= 1u;
      }
      v_symbol = ((uint32_t)(((uint16_t)(v_node & 32767u))));
      if (v_symbol == 0u) {
        self->private_data.f_code_lengths[v_s] = 0u;
        v_s += 1u;
        continue;
      } else if (v_symbol < 16u) {
        v_prev_code_length = ((uint16_t)(v_symbol));
        self->private_data.f_code_lengths[v_s] = v_prev_code_length;
        v_s += 1u;
        continue;
      } else if (v_symbol == 16u) {
        v_repeat_value = v_prev_code_length;
      } else {
        v_repeat_value = 0u;
      }
      v_repeat_n_bits = ((uint32_t)(WUFFS_WEBP__REPEAT_N_BITS[(v_symbol & 3u)]));
      v_s_max = ((uint32_t)(((uint32_t)(WUFFS_WEBP__REPEAT_COUNTS[(v_symbol & 3u)])) + v_s));
      if (self->private_impl.f_n_bits < v_repeat_n_bits) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_4 = *iop_a_src++;
          v_c8 = t_4;
        }
        if (self->private_impl.f_n_bits >= v_repeat_n_bits) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
          goto exit;
        }
        self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
        self->private_impl.f_n_bits += 8u;
      }
      v_s_max += (self->private_impl.f_bits & ((((uint32_t)(1u)) << v_repeat_n_bits) - 1u));
      self->private_impl.f_bits >>= v_repeat_n_bits;
      self->private_impl.f_n_bits -= v_repeat_n_bits;
      if (v_s_max > self->private_impl.f_ht_n_symbols) {
        status = wuffs_base__make_status(wuffs_webp__error__bad_huffman_code);
        goto exit;
      }
      while (v_s < v_s_max) {
        self->private_data.f_code_lengths[v_s] = v_repeat_value;
        v_s += 1u;
      }
    }

    goto ok;
    ok:
    self->private_impl.p_build_code_lengths = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_build_code_lengths = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_build_code_lengths.v_length_n_bits = v_length_n_bits;
  self->private_data.s_build_code_lengths.v_prev_code_length = v_prev_code_length;
  self->private_data.s_build_code_lengths.v_s = v_s;
  self->private_data.s_build_code_lengths.v_s_max = v_s_max;
  self->private_data.s_build_code_lengths.v_node = v_node;
  self->private_data.s_build_code_lengths.v_repeat_value = v_repeat_value;
  self->private_data.s_build_code_lengths.v_repeat_n_bits = v_repeat_n_bits;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.decode_pixels_slow

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_pixels_slow(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_dst,
    wuffs_base__io_buffer* a_src,
    uint32_t a_width,
    uint32_t a_height,
    wuffs_base__slice_u8 a_tile_data,
    uint32_t a_tile_size_log2) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint64_t v_p = 0;
  uint64_t v_p_max = 0;
  uint32_t v_tile_size_log2 = 0;
  uint32_t v_width_in_tiles = 0;
  uint32_t v_x = 0;
  uint32_t v_y = 0;
  uint32_t v_i = 0;
  uint32_t v_hg = 0;
  uint32_t v_h = 0;
  uint16_t v_node = 0;
  uint32_t v_pixel_g = 0;
  uint32_t v_color = 0;
  wuffs_base__slice_u8 v_dst_pixel = {0};
  uint32_t v_back_ref_len_n_bits = 0;
  uint32_t v_back_ref_len_minus_1 = 0;
  uint32_t v_back_ref_dist_n_bits = 0;
  uint32_t v_back_ref_dist_sym = 0;
  uint32_t v_back_ref_dist_premap_minus_1 = 0;
  uint32_t v_back_ref_dist_minus_1 = 0;
  uint32_t v_dm = 0;
  uint32_t v_dx = 0;
  uint32_t v_dy = 0;
  uint64_t v_p_end = 0;
  uint64_t v_dist4 = 0;
  uint64_t v_q = 0;
  wuffs_base__slice_u8 v_color_cache_pixels = {0};
  uint64_t v_color_cache_p = 0;
  uint32_t v_color_cache_shift = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_pixels_slow;
  if (coro_susp_point) {
    v_p = self->private_data.s_decode_pixels_slow.v_p;
    v_p_max = self->private_data.s_decode_pixels_slow.v_p_max;
    v_tile_size_log2 = self->private_data.s_decode_pixels_slow.v_tile_size_log2;
    v_width_in_tiles = self->private_data.s_decode_pixels_slow.v_width_in_tiles;
    v_x = self->private_data.s_decode_pixels_slow.v_x;
    v_y = self->private_data.s_decode_pixels_slow.v_y;
    v_hg = self->private_data.s_decode_pixels_slow.v_hg;
    v_node = self->private_data.s_decode_pixels_slow.v_node;
    v_color = self->private_data.s_decode_pixels_slow.v_color;
    v_back_ref_len_n_bits = self->private_data.s_decode_pixels_slow.v_back_ref_len_n_bits;
    v_back_ref_len_minus_1 = self->private_data.s_decode_pixels_slow.v_back_ref_len_minus_1;
    v_back_ref_dist_n_bits = self->private_data.s_decode_pixels_slow.v_back_ref_dist_n_bits;
    v_back_ref_dist_premap_minus_1 = self->private_data.s_decode_pixels_slow.v_back_ref_dist_premap_minus_1;
    v_color_cache_p = self->private_data.s_decode_pixels_slow.v_color_cache_p;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    v_p_max = ((uint64_t)((4u * a_width * a_height)));
    if (((uint64_t)(a_dst.len)) < v_p_max) {
      status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_dst_buffer);
      goto exit;
    }
    if (a_tile_size_log2 != 0u) {
      v_tile_size_log2 = a_tile_size_log2;
      v_width_in_tiles = ((a_width + ((((uint32_t)(1u)) << v_tile_size_log2) - 1u)) >> v_tile_size_log2);
    } else {
      v_tile_size_log2 = 31u;
      v_width_in_tiles = 1u;
    }
    while (v_p < v_p_max) {
      v_i = ((uint32_t)(((uint32_t)(((uint32_t)(((uint32_t)((v_y >> v_tile_size_log2) * v_width_in_tiles)) + (v_x >> v_tile_size_log2))) * 4u)) + 1u));
      if (((uint64_t)(v_i)) < ((uint64_t)(a_tile_data.len))) {
        v_hg = ((uint32_t)(a_tile_data.ptr[((uint64_t)(v_i))]));
      }
      v_h = ((uint32_t)(WUFFS_WEBP__HUFFMAN_TABLE_BASE_OFFSETS[0u]));
      while (true) {
        v_node = self->private_data.f_huffman_nodes[v_hg][v_h];
        if (v_node >= 32768u) {
          break;
        } else if (v_node > 6265u) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_huffman_code);
          goto exit;
        }
        if (self->private_impl.f_n_bits < 1u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_0 = *iop_a_src++;
            v_c8 = t_0;
          }
          self->private_impl.f_bits = ((uint32_t)(v_c8));
          self->private_impl.f_n_bits = 8u;
        }
        v_h = (((uint32_t)(v_node)) + (self->private_impl.f_bits & 1u));
        self->private_impl.f_bits >>= 1u;
        self->private_impl.f_n_bits -= 1u;
      }
      v_pixel_g = ((uint32_t)(((uint16_t)(v_node & 32767u))));
      if (v_pixel_g < 256u) {
        v_color = (v_pixel_g << 8u);
        v_h = ((uint32_t)(WUFFS_WEBP__HUFFMAN_TABLE_BASE_OFFSETS[1u]));
        while (true) {
          v_node = self->private_data.f_huffman_nodes[v_hg][v_h];
          if (v_node >= 32768u) {
            break;
          }
          if (self->private_impl.f_n_bits < 1u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_1 = *iop_a_src++;
              v_c8 = t_1;
            }
            self->private_impl.f_bits = ((uint32_t)(v_c8));
            self->private_impl.f_n_bits = 8u;
          }
          v_h = ((((uint32_t)(v_node)) & 4095u) + (self->private_impl.f_bits & 1u));
          self->private_impl.f_bits >>= 1u;
          self->private_impl.f_n_bits -= 1u;
        }
        v_color |= (((uint32_t)(((uint16_t)(v_node & 255u)))) << 16u);
        v_h = ((uint32_t)(WUFFS_WEBP__HUFFMAN_TABLE_BASE_OFFSETS[2u]));
        while (true) {
          v_node = self->private_data.f_huffman_nodes[v_hg][v_h];
          if (v_node >= 32768u) {
            break;
          }
          if (self->private_impl.f_n_bits < 1u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_2 = *iop_a_src++;
              v_c8 = t_2;
            }
            self->private_impl.f_bits = ((uint32_t)(v_c8));
            self->private_impl.f_n_bits = 8u;
          }
          v_h = ((((uint32_t)(v_node)) & 4095u) + (self->private_impl.f_bits & 1u));
          self->private_impl.f_bits >>= 1u;
          self->private_impl.f_n_bits -= 1u;
        }
        v_color |= (((uint32_t)(((uint16_t)(v_node & 255u)))) << 0u);
        v_h = ((uint32_t)(WUFFS_WEBP__HUFFMAN_TABLE_BASE_OFFSETS[3u]));
        while (true) {
          v_node = self->private_data.f_huffman_nodes[v_hg][v_h];
          if (v_node >= 32768u) {
            break;
          }
          if (self->private_impl.f_n_bits < 1u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_3 = *iop_a_src++;
              v_c8 = t_3;
            }
            self->private_impl.f_bits = ((uint32_t)(v_c8));
            self->private_impl.f_n_bits = 8u;
          }
          v_h = ((((uint32_t)(v_node)) & 4095u) + (self->private_impl.f_bits & 1u));
          self->private_impl.f_bits >>= 1u;
          self->private_impl.f_n_bits -= 1u;
        }
        v_color |= (((uint32_t)(((uint16_t)(v_node & 255u)))) << 24u);
      } else if (v_pixel_g < 280u) {
        if (v_pixel_g < 260u) {
          v_back_ref_len_minus_1 = (v_pixel_g - 256u);
        } else {
          v_back_ref_len_n_bits = ((v_pixel_g - 258u) >> 1u);
          v_back_ref_len_minus_1 = ((((uint32_t)(2u)) + (v_pixel_g & 1u)) << v_back_ref_len_n_bits);
          while (self->private_impl.f_n_bits < v_back_ref_len_n_bits) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_4 = *iop_a_src++;
              v_c8 = t_4;
            }
            if (self->private_impl.f_n_bits >= v_back_ref_len_n_bits) {
              status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
              goto exit;
            }
            self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
            self->private_impl.f_n_bits += 8u;
          }
          v_back_ref_len_minus_1 += (self->private_impl.f_bits & ((((uint32_t)(1u)) << v_back_ref_len_n_bits) - 1u));
          self->private_impl.f_bits >>= v_back_ref_len_n_bits;
          self->private_impl.f_n_bits -= v_back_ref_len_n_bits;
        }
        v_h = ((uint32_t)(WUFFS_WEBP__HUFFMAN_TABLE_BASE_OFFSETS[4u]));
        while (true) {
          v_node = self->private_data.f_huffman_nodes[v_hg][v_h];
          if (v_node >= 32768u) {
            break;
          }
          if (self->private_impl.f_n_bits < 1u) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_5 = *iop_a_src++;
              v_c8 = t_5;
            }
            self->private_impl.f_bits = ((uint32_t)(v_c8));
            self->private_impl.f_n_bits = 8u;
          }
          v_h = ((((uint32_t)(v_node)) & 4095u) + (self->private_impl.f_bits & 1u));
          self->private_impl.f_bits >>= 1u;
          self->private_impl.f_n_bits -= 1u;
        }
        v_back_ref_dist_sym = ((uint32_t)(((uint16_t)(v_node & 32767u))));
        if (v_back_ref_dist_sym < 4u) {
          v_back_ref_dist_premap_minus_1 = v_back_ref_dist_sym;
        } else if (v_back_ref_dist_sym < 40u) {
          v_back_ref_dist_n_bits = ((v_back_ref_dist_sym - 2u) >> 1u);
          v_back_ref_dist_premap_minus_1 = ((((uint32_t)(2u)) + (v_back_ref_dist_sym & 1u)) << v_back_ref_dist_n_bits);
          while (self->private_impl.f_n_bits < v_back_ref_dist_n_bits) {
            {
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint8_t t_6 = *iop_a_src++;
              v_c8 = t_6;
            }
            if (self->private_impl.f_n_bits >= v_back_ref_dist_n_bits) {
              status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
              goto exit;
            }
            self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
            self->private_impl.f_n_bits += 8u;
          }
          v_back_ref_dist_premap_minus_1 += (self->private_impl.f_bits & ((((uint32_t)(1u)) << v_back_ref_dist_n_bits) - 1u));
          self->private_impl.f_bits >>= v_back_ref_dist_n_bits;
          self->private_impl.f_n_bits -= v_back_ref_dist_n_bits;
        }
        if (v_back_ref_dist_premap_minus_1 >= 120u) {
          v_back_ref_dist_minus_1 = (v_back_ref_dist_premap_minus_1 - 120u);
        } else {
          v_dm = ((uint32_t)(WUFFS_WEBP__DISTANCE_MAP[v_back_ref_dist_premap_minus_1]));
          v_dy = (v_dm >> 4u);
          v_dx = ((uint32_t)(7u - (v_dm & 15u)));
          v_back_ref_dist_minus_1 = ((uint32_t)((a_width * v_dy) + v_dx));
        }
        v_p_end = (v_p + ((uint64_t)(((v_back_ref_len_minus_1 + 1u) * 4u))));
        v_dist4 = ((((uint64_t)(v_back_ref_dist_minus_1)) * 4u) + 4u);
        if ((v_p_end > v_p_max) || (v_p_end > ((uint64_t)(a_dst.len))) || (v_p < v_dist4)) {
          status = wuffs_base__make_status(wuffs_webp__error__bad_back_reference);
          goto exit;
        }
        v_q = (v_p - v_dist4);
        while ((v_q < v_p) && (v_p < v_p_end)) {
          a_dst.ptr[v_p] = a_dst.ptr[v_q];
          v_p += 1u;
          v_q += 1u;
        }
        v_x += (v_back_ref_len_minus_1 + 1u);
        while (v_x >= a_width) {
          v_x -= a_width;
          v_y += 1u;
        }
        continue;
      } else {
        if ((v_color_cache_p > v_p) || (v_p > ((uint64_t)(a_dst.len)))) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_dst_buffer);
          goto exit;
        }
        v_color_cache_pixels = wuffs_base__slice_u8__subslice_ij(a_dst, v_color_cache_p, v_p);
        v_color_cache_p = v_p;
        v_color_cache_shift = ((32u - self->private_impl.f_color_cache_bits) & 31u);
        while (((uint64_t)(v_color_cache_pixels.len)) >= 4u) {
          v_color = wuffs_base__peek_u32le__no_bounds_check(v_color_cache_pixels.ptr);
          self->private_data.f_color_cache[((((uint32_t)(v_color * 506832829u)) >> v_color_cache_shift) & 2047u)] = v_color;
          v_color_cache_pixels = wuffs_base__slice_u8__subslice_i(v_color_cache_pixels, 4u);
        }
        v_color = self->private_data.f_color_cache[((v_pixel_g - 280u) & 2047u)];
      }
      if (v_p > ((uint64_t)(a_dst.len))) {
        status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_dst_buffer);
        goto exit;
      }
      v_dst_pixel = wuffs_base__slice_u8__subslice_i(a_dst, v_p);
      if (((uint64_t)(v_dst_pixel.len)) < 4u) {
        status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_dst_buffer);
        goto exit;
      }
      wuffs_base__poke_u32le__no_bounds_check(v_dst_pixel.ptr, v_color);
      v_p += 4u;
      v_x += 1u;
      if (v_x == a_width) {
        v_x = 0u;
        v_y += 1u;
      }
    }

    goto ok;
    ok:
    self->private_impl.p_decode_pixels_slow = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_pixels_slow = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_pixels_slow.v_p = v_p;
  self->private_data.s_decode_pixels_slow.v_p_max = v_p_max;
  self->private_data.s_decode_pixels_slow.v_tile_size_log2 = v_tile_size_log2;
  self->private_data.s_decode_pixels_slow.v_width_in_tiles = v_width_in_tiles;
  self->private_data.s_decode_pixels_slow.v_x = v_x;
  self->private_data.s_decode_pixels_slow.v_y = v_y;
  self->private_data.s_decode_pixels_slow.v_hg = v_hg;
  self->private_data.s_decode_pixels_slow.v_node = v_node;
  self->private_data.s_decode_pixels_slow.v_color = v_color;
  self->private_data.s_decode_pixels_slow.v_back_ref_len_n_bits = v_back_ref_len_n_bits;
  self->private_data.s_decode_pixels_slow.v_back_ref_len_minus_1 = v_back_ref_len_minus_1;
  self->private_data.s_decode_pixels_slow.v_back_ref_dist_n_bits = v_back_ref_dist_n_bits;
  self->private_data.s_decode_pixels_slow.v_back_ref_dist_premap_minus_1 = v_back_ref_dist_premap_minus_1;
  self->private_data.s_decode_pixels_slow.v_color_cache_p = v_color_cache_p;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.apply_transform_predictor

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_webp__decoder__apply_transform_predictor(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_pix,
    wuffs_base__slice_u8 a_tile_data) {
  uint64_t v_w4 = 0;
  wuffs_base__slice_u8 v_prev_row = {0};
  wuffs_base__slice_u8 v_curr_row = {0};
  uint32_t v_tile_size_log2 = 0;
  uint32_t v_tiles_per_row = 0;
  uint32_t v_mask = 0;
  uint32_t v_y = 0;
  uint32_t v_x = 0;
  uint64_t v_t = 0;
  wuffs_base__slice_u8 v_tile_data = {0};
  uint8_t v_mode = 0;
  uint32_t v_l0 = 0;
  uint32_t v_l1 = 0;
  uint32_t v_l2 = 0;
  uint32_t v_l3 = 0;
  uint32_t v_c0 = 0;
  uint32_t v_c1 = 0;
  uint32_t v_c2 = 0;
  uint32_t v_c3 = 0;
  uint32_t v_t0 = 0;
  uint32_t v_t1 = 0;
  uint32_t v_t2 = 0;
  uint32_t v_t3 = 0;
  uint32_t v_sum_l = 0;
  uint32_t v_sum_t = 0;

  if ((self->private_impl.f_width <= 0u) || (self->private_impl.f_height <= 0u)) {
    return wuffs_base__make_empty_struct();
  }
  v_w4 = ((uint64_t)((self->private_impl.f_width * 4u)));
  v_curr_row = wuffs_base__utility__empty_slice_u8();
  if (v_w4 <= ((uint64_t)(a_pix.len))) {
    v_curr_row = wuffs_base__slice_u8__subslice_j(a_pix, v_w4);
  }
  if (((uint64_t)(v_curr_row.len)) >= 4u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
    v_curr_row.ptr[3u] += 255u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  }
  while (((uint64_t)(v_curr_row.len)) >= 8u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
    v_curr_row.ptr[4u] += v_curr_row.ptr[0u];
    v_curr_row.ptr[5u] += v_curr_row.ptr[1u];
    v_curr_row.ptr[6u] += v_curr_row.ptr[2u];
    v_curr_row.ptr[7u] += v_curr_row.ptr[3u];
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    v_curr_row = wuffs_base__slice_u8__subslice_i(v_curr_row, 4u);
  }
  v_tile_size_log2 = ((uint32_t)(self->private_impl.f_transform_tile_size_log2[0u]));
  v_tiles_per_row = ((self->private_impl.f_width + ((((uint32_t)(1u)) << v_tile_size_log2) - 1u)) >> v_tile_size_log2);
  v_mask = ((((uint32_t)(1u)) << v_tile_size_log2) - 1u);
  v_y = 1u;
  while (v_y < self->private_impl.f_height) {
    v_t = ((uint64_t)((4u * (v_y >> v_tile_size_log2) * v_tiles_per_row)));
    v_tile_data = wuffs_base__utility__empty_slice_u8();
    if (v_t <= ((uint64_t)(a_tile_data.len))) {
      v_tile_data = wuffs_base__slice_u8__subslice_i(a_tile_data, v_t);
      if (((uint64_t)(v_tile_data.len)) >= 4u) {
        v_mode = ((uint8_t)(v_tile_data.ptr[1u] & 15u));
        v_tile_data = wuffs_base__slice_u8__subslice_i(v_tile_data, 4u);
      }
    }
    if (v_w4 <= ((uint64_t)(a_pix.len))) {
      v_prev_row = a_pix;
      a_pix = wuffs_base__slice_u8__subslice_i(a_pix, v_w4);
      v_curr_row = a_pix;
    }
    if ((((uint64_t)(v_prev_row.len)) >= 4u) && (((uint64_t)(v_curr_row.len)) >= 4u)) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
      v_curr_row.ptr[0u] += v_prev_row.ptr[0u];
      v_curr_row.ptr[1u] += v_prev_row.ptr[1u];
      v_curr_row.ptr[2u] += v_prev_row.ptr[2u];
      v_curr_row.ptr[3u] += v_prev_row.ptr[3u];
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    }
    v_x = 1u;
    while (v_x < self->private_impl.f_width) {
      if (((v_x & v_mask) == 0u) && (((uint64_t)(v_tile_data.len)) >= 4u)) {
        v_mode = ((uint8_t)(v_tile_data.ptr[1u] & 15u));
        v_tile_data = wuffs_base__slice_u8__subslice_i(v_tile_data, 4u);
      }
      if ((((uint64_t)(v_prev_row.len)) < 12u) || (((uint64_t)(v_curr_row.len)) < 8u)) {
        break;
      }
      if (v_mode == 0u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[7u] += 255u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 1u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += v_curr_row.ptr[0u];
        v_curr_row.ptr[5u] += v_curr_row.ptr[1u];
        v_curr_row.ptr[6u] += v_curr_row.ptr[2u];
        v_curr_row.ptr[7u] += v_curr_row.ptr[3u];
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 2u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += v_prev_row.ptr[4u];
        v_curr_row.ptr[5u] += v_prev_row.ptr[5u];
        v_curr_row.ptr[6u] += v_prev_row.ptr[6u];
        v_curr_row.ptr[7u] += v_prev_row.ptr[7u];
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 3u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += v_prev_row.ptr[8u];
        v_curr_row.ptr[5u] += v_prev_row.ptr[9u];
        v_curr_row.ptr[6u] += v_prev_row.ptr[10u];
        v_curr_row.ptr[7u] += v_prev_row.ptr[11u];
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 4u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += v_prev_row.ptr[0u];
        v_curr_row.ptr[5u] += v_prev_row.ptr[1u];
        v_curr_row.ptr[6u] += v_prev_row.ptr[2u];
        v_curr_row.ptr[7u] += v_prev_row.ptr[3u];
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 5u) {
        v_l0 = ((((uint32_t)(v_curr_row.ptr[0u])) + ((uint32_t)(v_prev_row.ptr[8u]))) / 2u);
        v_l1 = ((((uint32_t)(v_curr_row.ptr[1u])) + ((uint32_t)(v_prev_row.ptr[9u]))) / 2u);
        v_l2 = ((((uint32_t)(v_curr_row.ptr[2u])) + ((uint32_t)(v_prev_row.ptr[10u]))) / 2u);
        v_l3 = ((((uint32_t)(v_curr_row.ptr[3u])) + ((uint32_t)(v_prev_row.ptr[11u]))) / 2u);
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += ((uint8_t)(((v_l0 + ((uint32_t)(v_prev_row.ptr[4u]))) / 2u)));
        v_curr_row.ptr[5u] += ((uint8_t)(((v_l1 + ((uint32_t)(v_prev_row.ptr[5u]))) / 2u)));
        v_curr_row.ptr[6u] += ((uint8_t)(((v_l2 + ((uint32_t)(v_prev_row.ptr[6u]))) / 2u)));
        v_curr_row.ptr[7u] += ((uint8_t)(((v_l3 + ((uint32_t)(v_prev_row.ptr[7u]))) / 2u)));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 6u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += ((uint8_t)(((((uint32_t)(v_curr_row.ptr[0u])) + ((uint32_t)(v_prev_row.ptr[0u]))) / 2u)));
        v_curr_row.ptr[5u] += ((uint8_t)(((((uint32_t)(v_curr_row.ptr[1u])) + ((uint32_t)(v_prev_row.ptr[1u]))) / 2u)));
        v_curr_row.ptr[6u] += ((uint8_t)(((((uint32_t)(v_curr_row.ptr[2u])) + ((uint32_t)(v_prev_row.ptr[2u]))) / 2u)));
        v_curr_row.ptr[7u] += ((uint8_t)(((((uint32_t)(v_curr_row.ptr[3u])) + ((uint32_t)(v_prev_row.ptr[3u]))) / 2u)));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 7u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += ((uint8_t)(((((uint32_t)(v_curr_row.ptr[0u])) + ((uint32_t)(v_prev_row.ptr[4u]))) / 2u)));
        v_curr_row.ptr[5u] += ((uint8_t)(((((uint32_t)(v_curr_row.ptr[1u])) + ((uint32_t)(v_prev_row.ptr[5u]))) / 2u)));
        v_curr_row.ptr[6u] += ((uint8_t)(((((uint32_t)(v_curr_row.ptr[2u])) + ((uint32_t)(v_prev_row.ptr[6u]))) / 2u)));
        v_curr_row.ptr[7u] += ((uint8_t)(((((uint32_t)(v_curr_row.ptr[3u])) + ((uint32_t)(v_prev_row.ptr[7u]))) / 2u)));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 8u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += ((uint8_t)(((((uint32_t)(v_prev_row.ptr[0u])) + ((uint32_t)(v_prev_row.ptr[4u]))) / 2u)));
        v_curr_row.ptr[5u] += ((uint8_t)(((((uint32_t)(v_prev_row.ptr[1u])) + ((uint32_t)(v_prev_row.ptr[5u]))) / 2u)));
        v_curr_row.ptr[6u] += ((uint8_t)(((((uint32_t)(v_prev_row.ptr[2u])) + ((uint32_t)(v_prev_row.ptr[6u]))) / 2u)));
        v_curr_row.ptr[7u] += ((uint8_t)(((((uint32_t)(v_prev_row.ptr[3u])) + ((uint32_t)(v_prev_row.ptr[7u]))) / 2u)));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 9u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += ((uint8_t)(((((uint32_t)(v_prev_row.ptr[4u])) + ((uint32_t)(v_prev_row.ptr[8u]))) / 2u)));
        v_curr_row.ptr[5u] += ((uint8_t)(((((uint32_t)(v_prev_row.ptr[5u])) + ((uint32_t)(v_prev_row.ptr[9u]))) / 2u)));
        v_curr_row.ptr[6u] += ((uint8_t)(((((uint32_t)(v_prev_row.ptr[6u])) + ((uint32_t)(v_prev_row.ptr[10u]))) / 2u)));
        v_curr_row.ptr[7u] += ((uint8_t)(((((uint32_t)(v_prev_row.ptr[7u])) + ((uint32_t)(v_prev_row.ptr[11u]))) / 2u)));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 10u) {
        v_l0 = ((((uint32_t)(v_curr_row.ptr[0u])) + ((uint32_t)(v_prev_row.ptr[0u]))) / 2u);
        v_l1 = ((((uint32_t)(v_curr_row.ptr[1u])) + ((uint32_t)(v_prev_row.ptr[1u]))) / 2u);
        v_l2 = ((((uint32_t)(v_curr_row.ptr[2u])) + ((uint32_t)(v_prev_row.ptr[2u]))) / 2u);
        v_l3 = ((((uint32_t)(v_curr_row.ptr[3u])) + ((uint32_t)(v_prev_row.ptr[3u]))) / 2u);
        v_t0 = ((((uint32_t)(v_prev_row.ptr[4u])) + ((uint32_t)(v_prev_row.ptr[8u]))) / 2u);
        v_t1 = ((((uint32_t)(v_prev_row.ptr[5u])) + ((uint32_t)(v_prev_row.ptr[9u]))) / 2u);
        v_t2 = ((((uint32_t)(v_prev_row.ptr[6u])) + ((uint32_t)(v_prev_row.ptr[10u]))) / 2u);
        v_t3 = ((((uint32_t)(v_prev_row.ptr[7u])) + ((uint32_t)(v_prev_row.ptr[11u]))) / 2u);
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += ((uint8_t)(((v_l0 + v_t0) / 2u)));
        v_curr_row.ptr[5u] += ((uint8_t)(((v_l1 + v_t1) / 2u)));
        v_curr_row.ptr[6u] += ((uint8_t)(((v_l2 + v_t2) / 2u)));
        v_curr_row.ptr[7u] += ((uint8_t)(((v_l3 + v_t3) / 2u)));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 11u) {
        v_l0 = ((uint32_t)(v_curr_row.ptr[0u]));
        v_l1 = ((uint32_t)(v_curr_row.ptr[1u]));
        v_l2 = ((uint32_t)(v_curr_row.ptr[2u]));
        v_l3 = ((uint32_t)(v_curr_row.ptr[3u]));
        v_c0 = ((uint32_t)(v_prev_row.ptr[0u]));
        v_c1 = ((uint32_t)(v_prev_row.ptr[1u]));
        v_c2 = ((uint32_t)(v_prev_row.ptr[2u]));
        v_c3 = ((uint32_t)(v_prev_row.ptr[3u]));
        v_t0 = ((uint32_t)(v_prev_row.ptr[4u]));
        v_t1 = ((uint32_t)(v_prev_row.ptr[5u]));
        v_t2 = ((uint32_t)(v_prev_row.ptr[6u]));
        v_t3 = ((uint32_t)(v_prev_row.ptr[7u]));
        v_sum_l = (wuffs_webp__decoder__absolute_difference(self, v_c0, v_t0) +
            wuffs_webp__decoder__absolute_difference(self, v_c1, v_t1) +
            wuffs_webp__decoder__absolute_difference(self, v_c2, v_t2) +
            wuffs_webp__decoder__absolute_difference(self, v_c3, v_t3));
        v_sum_t = (wuffs_webp__decoder__absolute_difference(self, v_c0, v_l0) +
            wuffs_webp__decoder__absolute_difference(self, v_c1, v_l1) +
            wuffs_webp__decoder__absolute_difference(self, v_c2, v_l2) +
            wuffs_webp__decoder__absolute_difference(self, v_c3, v_l3));
        if (v_sum_l < v_sum_t) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          v_curr_row.ptr[4u] += ((uint8_t)(v_l0));
          v_curr_row.ptr[5u] += ((uint8_t)(v_l1));
          v_curr_row.ptr[6u] += ((uint8_t)(v_l2));
          v_curr_row.ptr[7u] += ((uint8_t)(v_l3));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        } else {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
          v_curr_row.ptr[4u] += ((uint8_t)(v_t0));
          v_curr_row.ptr[5u] += ((uint8_t)(v_t1));
          v_curr_row.ptr[6u] += ((uint8_t)(v_t2));
          v_curr_row.ptr[7u] += ((uint8_t)(v_t3));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        }
      } else if (v_mode == 12u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += wuffs_webp__decoder__mode12(self, v_curr_row.ptr[0u], v_prev_row.ptr[4u], v_prev_row.ptr[0u]);
        v_curr_row.ptr[5u] += wuffs_webp__decoder__mode12(self, v_curr_row.ptr[1u], v_prev_row.ptr[5u], v_prev_row.ptr[1u]);
        v_curr_row.ptr[6u] += wuffs_webp__decoder__mode12(self, v_curr_row.ptr[2u], v_prev_row.ptr[6u], v_prev_row.ptr[2u]);
        v_curr_row.ptr[7u] += wuffs_webp__decoder__mode12(self, v_curr_row.ptr[3u], v_prev_row.ptr[7u], v_prev_row.ptr[3u]);
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      } else if (v_mode == 13u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_curr_row.ptr[4u] += wuffs_webp__decoder__mode13(self, v_curr_row.ptr[0u], v_prev_row.ptr[4u], v_prev_row.ptr[0u]);
        v_curr_row.ptr[5u] += wuffs_webp__decoder__mode13(self, v_curr_row.ptr[1u], v_prev_row.ptr[5u], v_prev_row.ptr[1u]);
        v_curr_row.ptr[6u] += wuffs_webp__decoder__mode13(self, v_curr_row.ptr[2u], v_prev_row.ptr[6u], v_prev_row.ptr[2u]);
        v_curr_row.ptr[7u] += wuffs_webp__decoder__mode13(self, v_curr_row.ptr[3u], v_prev_row.ptr[7u], v_prev_row.ptr[3u]);
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      }
      v_curr_row = wuffs_base__slice_u8__subslice_i(v_curr_row, 4u);
      v_prev_row = wuffs_base__slice_u8__subslice_i(v_prev_row, 4u);
      v_x += 1u;
    }
    v_y += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func webp.decoder.absolute_difference

WUFFS_BASE__GENERATED_C_CODE
static uint32_t
wuffs_webp__decoder__absolute_difference(
    const wuffs_webp__decoder* self,
    uint32_t a_a,
    uint32_t a_b) {
  if (a_a < a_b) {
    return (a_b - a_a);
  }
  return (a_a - a_b);
}

// -------- func webp.decoder.mode12

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_webp__decoder__mode12(
    const wuffs_webp__decoder* self,
    uint8_t a_l,
    uint8_t a_t,
    uint8_t a_tl) {
  uint32_t v_v = 0;

  v_v = ((uint32_t)((((uint32_t)(a_l)) + ((uint32_t)(a_t))) - ((uint32_t)(a_tl))));
  if (v_v < 256u) {
    return ((uint8_t)(v_v));
  } else if (v_v < 512u) {
    return 255u;
  }
  return 0u;
}

// -------- func webp.decoder.mode13

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_webp__decoder__mode13(
    const wuffs_webp__decoder* self,
    uint8_t a_l,
    uint8_t a_t,
    uint8_t a_tl) {
  uint32_t v_x = 0;
  uint32_t v_y = 0;
  uint32_t v_z = 0;
  uint32_t v_v = 0;

  v_x = ((((uint32_t)(a_l)) + ((uint32_t)(a_t))) / 2u);
  v_y = ((uint32_t)(a_tl));
  v_z = ((uint32_t)(v_x - v_y));
  v_v = ((uint32_t)(v_x + wuffs_base__utility__sign_extend_rshift_u32(((uint32_t)(v_z + (v_z >> 31u))), 1u)));
  if (v_v < 256u) {
    return ((uint8_t)(v_v));
  } else if (v_v < 512u) {
    return 255u;
  }
  return 0u;
}

// -------- func webp.decoder.apply_transform_cross_color

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_webp__decoder__apply_transform_cross_color(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_pix,
    wuffs_base__slice_u8 a_tile_data) {
  uint32_t v_tile_size_log2 = 0;
  uint32_t v_tiles_per_row = 0;
  uint32_t v_mask = 0;
  uint32_t v_y = 0;
  uint32_t v_x = 0;
  uint64_t v_t = 0;
  wuffs_base__slice_u8 v_tile_data = {0};
  uint32_t v_g2r = 0;
  uint32_t v_g2b = 0;
  uint32_t v_r2b = 0;
  uint8_t v_b = 0;
  uint8_t v_g = 0;
  uint8_t v_r = 0;

  v_tile_size_log2 = ((uint32_t)(self->private_impl.f_transform_tile_size_log2[1u]));
  v_tiles_per_row = ((self->private_impl.f_width + ((((uint32_t)(1u)) << v_tile_size_log2) - 1u)) >> v_tile_size_log2);
  v_mask = ((((uint32_t)(1u)) << v_tile_size_log2) - 1u);
  v_y = 0u;
  while (v_y < self->private_impl.f_height) {
    v_t = ((uint64_t)((4u * (v_y >> v_tile_size_log2) * v_tiles_per_row)));
    v_tile_data = wuffs_base__utility__empty_slice_u8();
    if (v_t <= ((uint64_t)(a_tile_data.len))) {
      v_tile_data = wuffs_base__slice_u8__subslice_i(a_tile_data, v_t);
    }
    v_x = 0u;
    while (v_x < self->private_impl.f_width) {
      if (((v_x & v_mask) == 0u) && (((uint64_t)(v_tile_data.len)) >= 4u)) {
        v_g2r = wuffs_base__utility__sign_extend_convert_u8_u32(v_tile_data.ptr[0u]);
        v_g2b = wuffs_base__utility__sign_extend_convert_u8_u32(v_tile_data.ptr[1u]);
        v_r2b = wuffs_base__utility__sign_extend_convert_u8_u32(v_tile_data.ptr[2u]);
        v_tile_data = wuffs_base__slice_u8__subslice_i(v_tile_data, 4u);
      }
      if (((uint64_t)(a_pix.len)) >= 4u) {
        v_b = a_pix.ptr[0u];
        v_g = a_pix.ptr[1u];
        v_r = a_pix.ptr[2u];
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_r += ((uint8_t)((((uint32_t)(wuffs_base__utility__sign_extend_convert_u8_u32(v_g) * v_g2r)) >> 5u)));
        v_b += ((uint8_t)((((uint32_t)(wuffs_base__utility__sign_extend_convert_u8_u32(v_g) * v_g2b)) >> 5u)));
        v_b += ((uint8_t)((((uint32_t)(wuffs_base__utility__sign_extend_convert_u8_u32(v_r) * v_r2b)) >> 5u)));
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        a_pix.ptr[0u] = v_b;
        a_pix.ptr[2u] = v_r;
        a_pix = wuffs_base__slice_u8__subslice_i(a_pix, 4u);
      }
      v_x += 1u;
    }
    v_y += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func webp.decoder.apply_transform_subtract_green

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_webp__decoder__apply_transform_subtract_green(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_pix) {
  wuffs_base__slice_u8 v_p = {0};
  uint8_t v_g = 0;

  {
    wuffs_base__slice_u8 i_slice_p = a_pix;
    v_p.ptr = i_slice_p.ptr;
    v_p.len = 4;
    const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 4) * 4));
    while (v_p.ptr < i_end0_p) {
      v_g = v_p.ptr[1u];
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
      v_p.ptr[0u] += v_g;
      v_p.ptr[2u] += v_g;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
      v_p.ptr += 4;
    }
    v_p.len = 0;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func webp.decoder.apply_transform_color_indexing

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_webp__decoder__apply_transform_color_indexing(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_pix) {
  uint32_t v_tile_size_log2 = 0;
  uint32_t v_bits_per_pixel = 0;
  uint32_t v_x_mask = 0;
  uint32_t v_s_mask = 0;
  uint64_t v_src_index = 0;
  uint32_t v_y = 0;
  uint64_t v_di = 0;
  uint64_t v_dj = 0;
  wuffs_base__slice_u8 v_dst = {0};
  uint32_t v_x = 0;
  uint32_t v_s = 0;
  uint32_t v_p = 0;
  uint8_t v_p0 = 0;
  uint8_t v_p1 = 0;
  uint8_t v_p2 = 0;
  uint8_t v_p3 = 0;

  v_tile_size_log2 = ((uint32_t)(self->private_impl.f_transform_tile_size_log2[3u]));
  if (v_tile_size_log2 == 0u) {
    {
      wuffs_base__slice_u8 i_slice_dst = a_pix;
      v_dst.ptr = i_slice_dst.ptr;
      v_dst.len = 4;
      const uint8_t* i_end0_dst = wuffs_private_impl__ptr_u8_plus_len(v_dst.ptr, (((i_slice_dst.len - (size_t)(v_dst.ptr - i_slice_dst.ptr)) / 4) * 4));
      while (v_dst.ptr < i_end0_dst) {
        v_p = (((uint32_t)(v_dst.ptr[1u])) * 4u);
        v_p0 = self->private_data.f_palette[(v_p + 0u)];
        v_p1 = self->private_data.f_palette[(v_p + 1u)];
        v_p2 = self->private_data.f_palette[(v_p + 2u)];
        v_p3 = self->private_data.f_palette[(v_p + 3u)];
        v_dst.ptr[0u] = v_p0;
        v_dst.ptr[1u] = v_p1;
        v_dst.ptr[2u] = v_p2;
        v_dst.ptr[3u] = v_p3;
        v_dst.ptr += 4;
      }
      v_dst.len = 0;
    }
    return wuffs_base__make_empty_struct();
  }
  v_bits_per_pixel = (((uint32_t)(8u)) >> v_tile_size_log2);
  v_x_mask = ((((uint32_t)(1u)) << v_tile_size_log2) - 1u);
  v_s_mask = ((((uint32_t)(1u)) << v_bits_per_pixel) - 1u);
  v_src_index = ((uint64_t)((self->private_impl.f_workbuf_offset_for_color_indexing + 1u)));
  v_y = 0u;
  while (v_y < self->private_impl.f_height) {
    v_di = ((uint64_t)((4u * (v_y + 0u) * self->private_impl.f_width)));
    v_dj = ((uint64_t)((4u * (v_y + 1u) * self->private_impl.f_width)));
    if ((v_di > v_dj) || (v_dj > ((uint64_t)(a_pix.len)))) {
      break;
    }
    v_dst = wuffs_base__slice_u8__subslice_ij(a_pix, v_di, v_dj);
    v_x = 0u;
    while (((uint64_t)(v_dst.len)) >= 4u) {
      if (((v_x & v_x_mask) == 0u) && (v_src_index < ((uint64_t)(a_pix.len)))) {
        v_s = ((uint32_t)(a_pix.ptr[v_src_index]));
        v_src_index += 4u;
      }
      v_p = ((v_s & v_s_mask) * 4u);
      v_s >>= v_bits_per_pixel;
      v_p0 = self->private_data.f_palette[(v_p + 0u)];
      v_p1 = self->private_data.f_palette[(v_p + 1u)];
      v_p2 = self->private_data.f_palette[(v_p + 2u)];
      v_p3 = self->private_data.f_palette[(v_p + 3u)];
      v_dst.ptr[0u] = v_p0;
      v_dst.ptr[1u] = v_p1;
      v_dst.ptr[2u] = v_p2;
      v_dst.ptr[3u] = v_p3;
      v_dst = wuffs_base__slice_u8__subslice_i(v_dst, 4u);
      v_x += 1u;
    }
    v_y += 1u;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func webp.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_webp__decoder__get_quirk(
    const wuffs_webp__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func webp.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__set_quirk(
    wuffs_webp__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func webp.decoder.decode_image_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__decode_image_config(
    wuffs_webp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_webp__decoder__do_decode_image_config(self, a_dst, a_src);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_webp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func webp.decoder.do_decode_image_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_image_config(
    wuffs_webp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_c32 = 0;
  uint64_t v_r_mark = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence != 0u) {
      status = wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_c32 = t_0;
    }
    if (v_c32 != 1179011410u) {
      status = wuffs_base__make_status(wuffs_webp__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      self->private_impl.f_riff_chunk_length = t_1;
    }
    if ((self->private_impl.f_riff_chunk_length & 1u) != 0u) {
      status = wuffs_base__make_status(wuffs_webp__error__bad_header);
      goto exit;
    }
    while (true) {
      {
        const bool o_0_closed_a_src = a_src->meta.closed;
        const uint8_t* o_0_io2_a_src = io2_a_src;
        wuffs_private_impl__io_reader__limit(&io2_a_src, iop_a_src,
            ((uint64_t)(self->private_impl.f_riff_chunk_length)));
        if (a_src) {
          size_t n = ((size_t)(io2_a_src - a_src->data.ptr));
          a_src->meta.closed = a_src->meta.closed && (a_src->meta.wi <= n);
          a_src->meta.wi = n;
        }
        v_r_mark = ((uint64_t)(iop_a_src - io0_a_src));
        {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          wuffs_base__status t_2 = wuffs_webp__decoder__do_decode_image_config_limited(self, a_dst, a_src);
          v_status = t_2;
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        wuffs_private_impl__u32__sat_sub_indirect(&self->private_impl.f_riff_chunk_length, ((uint32_t)(wuffs_private_impl__io__count_since(v_r_mark, ((uint64_t)(iop_a_src - io0_a_src))))));
        io2_a_src = o_0_io2_a_src;
        if (a_src) {
          a_src->meta.closed = o_0_closed_a_src;
          a_src->meta.wi = ((size_t)(io2_a_src - a_src->data.ptr));
        }
      }
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      } else if ( ! wuffs_base__status__is_suspension(&v_status)) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      } else if ((v_status.repr == wuffs_base__suspension__short_read) && (self->private_impl.f_riff_chunk_length == 0u)) {
        status = wuffs_base__make_status(wuffs_webp__error__short_chunk);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
    }
    self->private_impl.f_frame_config_io_position = wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)));
    if ( ! self->private_impl.f_is_vp8_lossy && (a_dst != NULL)) {
      wuffs_base__image_config__set(
          a_dst,
          self->private_impl.f_pixfmt,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height,
          self->private_impl.f_frame_config_io_position,
          false);
    }
    self->private_impl.f_call_sequence = 32u;

    ok:
    self->private_impl.p_do_decode_image_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.do_decode_image_config_limited

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_image_config_limited(
    wuffs_webp__decoder* self,
    wuffs_base__image_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_c32 = 0;
  uint64_t v_r_mark = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config_limited;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config_limited.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config_limited.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_c32 = t_0;
    }
    if (v_c32 != 1346520407u) {
      status = wuffs_base__make_status(wuffs_webp__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config_limited.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config_limited.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      v_c32 = t_1;
    }
    if (v_c32 == 540561494u) {
      self->private_impl.f_is_vp8_lossy = true;
    } else if (v_c32 == 1278758998u) {
    } else if (v_c32 == 1480085590u) {
      status = wuffs_base__make_status(wuffs_webp__error__unsupported_webp_file);
      goto exit;
    } else {
      status = wuffs_base__make_status(wuffs_webp__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
      uint32_t t_2;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_2 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config_limited.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config_limited.scratch;
          uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
          if (num_bits_2 == 24) {
            t_2 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_2 += 8u;
          *scratch |= ((uint64_t)(num_bits_2)) << 56;
        }
      }
      self->private_impl.f_sub_chunk_length = t_2;
    }
    if (self->private_impl.f_sub_chunk_length < 4u) {
      status = wuffs_base__make_status(wuffs_webp__error__bad_header);
      goto exit;
    }
    self->private_impl.f_sub_chunk_has_padding = ((self->private_impl.f_sub_chunk_length & 1u) != 0u);
    while (true) {
      {
        const bool o_0_closed_a_src = a_src->meta.closed;
        const uint8_t* o_0_io2_a_src = io2_a_src;
        wuffs_private_impl__io_reader__limit(&io2_a_src, iop_a_src,
            ((uint64_t)(self->private_impl.f_sub_chunk_length)));
        if (a_src) {
          size_t n = ((size_t)(io2_a_src - a_src->data.ptr));
          a_src->meta.closed = a_src->meta.closed && (a_src->meta.wi <= n);
          a_src->meta.wi = n;
        }
        v_r_mark = ((uint64_t)(iop_a_src - io0_a_src));
        if (self->private_impl.f_is_vp8_lossy) {
          {
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            wuffs_base__status t_3 = wuffs_vp8__decoder__decode_image_config(&self->private_data.f_vp8, a_dst, a_src);
            v_status = t_3;
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
          }
        } else {
          {
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            wuffs_base__status t_4 = wuffs_webp__decoder__do_decode_image_config_limited_vp8l(self, a_src);
            v_status = t_4;
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
          }
        }
        wuffs_private_impl__u32__sat_sub_indirect(&self->private_impl.f_sub_chunk_length, ((uint32_t)(wuffs_private_impl__io__count_since(v_r_mark, ((uint64_t)(iop_a_src - io0_a_src))))));
        io2_a_src = o_0_io2_a_src;
        if (a_src) {
          a_src->meta.closed = o_0_closed_a_src;
          a_src->meta.wi = ((size_t)(io2_a_src - a_src->data.ptr));
        }
      }
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      } else if ( ! wuffs_base__status__is_suspension(&v_status)) {
        status = v_status;
        if (wuffs_base__status__is_error(&status)) {
          goto exit;
        } else if (wuffs_base__status__is_suspension(&status)) {
          status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
          goto exit;
        }
        goto ok;
      } else if ((v_status.repr == wuffs_base__suspension__short_read) && (self->private_impl.f_sub_chunk_length == 0u)) {
        status = wuffs_base__make_status(wuffs_webp__error__short_chunk);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(7);
    }

    ok:
    self->private_impl.p_do_decode_image_config_limited = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config_limited = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.do_decode_image_config_limited_vp8l

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_image_config_limited_vp8l(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_c32 = 0;
  uint32_t v_transform_size = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_image_config_limited_vp8l;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint32_t t_0 = *iop_a_src++;
      v_c32 = t_0;
    }
    if (v_c32 != 47u) {
      status = wuffs_base__make_status(wuffs_webp__error__bad_header);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_1 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_do_decode_image_config_limited_vp8l.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_do_decode_image_config_limited_vp8l.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 24) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      v_c32 = t_1;
    }
    self->private_impl.f_width = ((v_c32 & 16383u) + 1u);
    v_c32 >>= 14u;
    self->private_impl.f_height = ((v_c32 & 16383u) + 1u);
    v_c32 >>= 14u;
    self->private_impl.f_pixfmt = 2415954056u;
    if ((v_c32 & 1u) != 0u) {
      self->private_impl.f_pixfmt = 2164295816u;
    }
    v_c32 >>= 1u;
    if (v_c32 != 0u) {
      status = wuffs_base__make_status(wuffs_webp__error__bad_header);
      goto exit;
    }
    v_transform_size = (4u * ((self->private_impl.f_width + 3u) >> 2u) * ((self->private_impl.f_height + 3u) >> 2u));
    self->private_impl.f_workbuf_offset_for_transform[0u] = ((4u * self->private_impl.f_width * self->private_impl.f_height) + (0u * v_transform_size));
    self->private_impl.f_workbuf_offset_for_transform[1u] = ((4u * self->private_impl.f_width * self->private_impl.f_height) + (1u * v_transform_size));
    self->private_impl.f_workbuf_offset_for_transform[2u] = ((4u * self->private_impl.f_width * self->private_impl.f_height) + (2u * v_transform_size));
    self->private_impl.f_workbuf_offset_for_transform[3u] = ((4u * self->private_impl.f_width * self->private_impl.f_height) + (3u * v_transform_size));

    goto ok;
    ok:
    self->private_impl.p_do_decode_image_config_limited_vp8l = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_image_config_limited_vp8l = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__decode_frame_config(
    wuffs_webp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 2)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      if (self->private_impl.f_is_vp8_lossy) {
        {
          wuffs_base__status t_0 = wuffs_vp8__decoder__decode_frame_config(&self->private_data.f_vp8, a_dst, a_src);
          v_status = t_0;
        }
      } else {
        {
          wuffs_base__status t_1 = wuffs_webp__decoder__do_decode_frame_config(self, a_dst, a_src);
          v_status = t_1;
        }
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_webp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 2 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func webp.decoder.do_decode_frame_config

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_frame_config(
    wuffs_webp__decoder* self,
    wuffs_base__frame_config* a_dst,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame_config;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 32u) {
    } else if (self->private_impl.f_call_sequence < 32u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_webp__decoder__do_decode_image_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else if (self->private_impl.f_call_sequence == 40u) {
      if (self->private_impl.f_frame_config_io_position != wuffs_base__u64__sat_add((a_src ? a_src->meta.pos : 0), ((uint64_t)(iop_a_src - io0_a_src)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_restart);
        goto exit;
      }
    } else if (self->private_impl.f_call_sequence == 64u) {
      self->private_impl.f_call_sequence = 96u;
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    if (a_dst != NULL) {
      wuffs_base__frame_config__set(
          a_dst,
          wuffs_base__utility__make_rect_ie_u32(
          0u,
          0u,
          self->private_impl.f_width,
          self->private_impl.f_height),
          ((wuffs_base__flicks)(0u)),
          0u,
          self->private_impl.f_frame_config_io_position,
          0u,
          false,
          false,
          0u);
    }
    self->private_impl.f_call_sequence = 64u;

    ok:
    self->private_impl.p_do_decode_frame_config = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame_config = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.decode_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__decode_frame(
    wuffs_webp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 3)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_decode_frame;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      if (self->private_impl.f_is_vp8_lossy) {
        {
          wuffs_base__status t_0 = wuffs_vp8__decoder__decode_frame(&self->private_data.f_vp8,
              a_dst,
              a_src,
              a_blend,
              a_workbuf,
              a_opts);
          v_status = t_0;
        }
      } else {
        {
          wuffs_base__status t_1 = wuffs_webp__decoder__do_decode_frame(self,
              a_dst,
              a_src,
              a_blend,
              a_workbuf,
              a_opts);
          v_status = t_1;
        }
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_webp__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 3 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func webp.decoder.do_decode_frame

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__do_decode_frame(
    wuffs_webp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__pixel_blend a_blend,
    wuffs_base__slice_u8 a_workbuf,
    wuffs_base__decode_frame_options* a_opts) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_has_more = 0;
  uint32_t v_width = 0;
  wuffs_base__slice_u8 v_dst = {0};
  wuffs_base__slice_u8 v_tile_data = {0};
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  wuffs_base__slice_u8 v_pix = {0};
  uint32_t v_which = 0;
  uint32_t v_transform_type = 0;
  uint64_t v_ti = 0;
  uint64_t v_tj = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_decode_frame;
  if (coro_susp_point) {
    v_width = self->private_data.s_do_decode_frame.v_width;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_call_sequence == 64u) {
    } else if (self->private_impl.f_call_sequence < 64u) {
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      status = wuffs_webp__decoder__do_decode_frame_config(self, NULL, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    } else {
      status = wuffs_base__make_status(wuffs_base__note__end_of_data);
      goto ok;
    }
    self->private_impl.f_seen_transform[0u] = false;
    self->private_impl.f_seen_transform[1u] = false;
    self->private_impl.f_seen_transform[2u] = false;
    self->private_impl.f_seen_transform[3u] = false;
    self->private_impl.f_n_transforms = 0u;
    while (true) {
      if (self->private_impl.f_n_bits < 1u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_0 = *iop_a_src++;
          v_c8 = t_0;
        }
        self->private_impl.f_bits = ((uint32_t)(v_c8));
        self->private_impl.f_n_bits = 8u;
      }
      v_has_more = (self->private_impl.f_bits & 1u);
      self->private_impl.f_bits >>= 1u;
      self->private_impl.f_n_bits -= 1u;
      if (v_has_more == 0u) {
        break;
      }
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      status = wuffs_webp__decoder__decode_transform(self, a_src, a_workbuf);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
    }
    v_width = self->private_impl.f_width;
    if (self->private_impl.f_seen_transform[3u]) {
      v_width = self->private_impl.f_color_indexing_width;
    }
    if (a_src) {
      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
    status = wuffs_webp__decoder__decode_color_cache_parameters(self, a_src);
    if (a_src) {
      iop_a_src = a_src->data.ptr + a_src->meta.ri;
    }
    if (status.repr) {
      goto suspend;
    }
    self->private_impl.f_overall_color_cache_bits = self->private_impl.f_color_cache_bits;
    if (a_src) {
      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
    status = wuffs_webp__decoder__decode_hg_table(self, a_src, v_width, a_workbuf);
    if (a_src) {
      iop_a_src = a_src->data.ptr + a_src->meta.ri;
    }
    if (status.repr) {
      goto suspend;
    }
    self->private_impl.f_color_cache_bits = self->private_impl.f_overall_color_cache_bits;
    if (a_src) {
      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
    status = wuffs_webp__decoder__decode_huffman_groups(self, a_src, self->private_impl.f_overall_n_huffman_groups);
    if (a_src) {
      iop_a_src = a_src->data.ptr + a_src->meta.ri;
    }
    if (status.repr) {
      goto suspend;
    }
    while (true) {
      if ((((uint64_t)(self->private_impl.f_workbuf_offset_for_color_indexing)) > ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u]))) ||
          (((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])) > ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u]))) ||
          (((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u])) > ((uint64_t)(a_workbuf.len))) ||
          (((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])) > ((uint64_t)(a_workbuf.len)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
        goto exit;
      }
      v_dst = wuffs_base__slice_u8__subslice_ij(a_workbuf,
          ((uint64_t)(self->private_impl.f_workbuf_offset_for_color_indexing)),
          ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])));
      v_tile_data = wuffs_base__slice_u8__subslice_ij(a_workbuf,
          ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])),
          ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u])));
      {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        wuffs_base__status t_1 = wuffs_webp__decoder__decode_pixels(self,
            v_dst,
            a_src,
            v_width,
            self->private_impl.f_height,
            v_tile_data,
            self->private_impl.f_overall_tile_size_log2);
        v_status = t_1;
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
      }
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(7);
    }
    if (((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])) > ((uint64_t)(a_workbuf.len))) {
      status = wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
      goto exit;
    }
    v_pix = wuffs_base__slice_u8__subslice_j(a_workbuf, ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])));
    v_which = self->private_impl.f_n_transforms;
    while (v_which > 0u) {
      v_which -= 1u;
      v_transform_type = ((uint32_t)(self->private_impl.f_transform_type[v_which]));
      v_tile_data = wuffs_base__utility__empty_slice_u8();
      if (v_transform_type < 2u) {
        v_ti = ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[(v_transform_type + 1u)]));
        v_tj = ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[(v_transform_type + 2u)]));
        if ((v_ti <= v_tj) && (v_tj <= ((uint64_t)(a_workbuf.len)))) {
          v_tile_data = wuffs_base__slice_u8__subslice_ij(a_workbuf, v_ti, v_tj);
        }
      }
      if (v_transform_type == 0u) {
        wuffs_webp__decoder__apply_transform_predictor(self, v_pix, v_tile_data);
      } else if (v_transform_type == 1u) {
        wuffs_webp__decoder__apply_transform_cross_color(self, v_pix, v_tile_data);
      } else if (v_transform_type == 2u) {
        wuffs_webp__decoder__apply_transform_subtract_green(self, v_pix);
      } else {
        wuffs_webp__decoder__apply_transform_color_indexing(self, v_pix);
        v_width = self->private_impl.f_width;
      }
    }
    v_status = wuffs_webp__decoder__swizzle(self, a_dst, v_pix, a_blend);
    if ( ! wuffs_base__status__is_ok(&v_status)) {
      status = v_status;
      if (wuffs_base__status__is_error(&status)) {
        goto exit;
      } else if (wuffs_base__status__is_suspension(&status)) {
        status = wuffs_base__make_status(wuffs_base__error__cannot_return_a_suspension);
        goto exit;
      }
      goto ok;
    }
    self->private_impl.f_call_sequence = 96u;

    ok:
    self->private_impl.p_do_decode_frame = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_decode_frame = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_decode_frame.v_width = v_width;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.decode_transform

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_transform(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint8_t v_c8 = 0;
  uint32_t v_transform_type = 0;
  uint32_t v_tile_size_log2 = 0;
  wuffs_base__slice_u8 v_p = {0};

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_transform;
  if (coro_susp_point) {
    v_transform_type = self->private_data.s_decode_transform.v_transform_type;
    v_tile_size_log2 = self->private_data.s_decode_transform.v_tile_size_log2;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_n_bits < 2u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      if (self->private_impl.f_n_bits >= 2u) {
        status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
        goto exit;
      }
      self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
      self->private_impl.f_n_bits += 8u;
    }
    v_transform_type = (self->private_impl.f_bits & 3u);
    self->private_impl.f_bits >>= 2u;
    self->private_impl.f_n_bits -= 2u;
    if (self->private_impl.f_seen_transform[v_transform_type] || (self->private_impl.f_n_transforms >= 4u)) {
      status = wuffs_base__make_status(wuffs_webp__error__bad_transform);
      goto exit;
    } else if (self->private_impl.f_seen_transform[3u]) {
      status = wuffs_base__make_status(wuffs_webp__error__unsupported_transform_after_color_indexing_transform);
      goto exit;
    }
    self->private_impl.f_seen_transform[v_transform_type] = true;
    self->private_impl.f_transform_type[self->private_impl.f_n_transforms] = ((uint8_t)(v_transform_type));
    self->private_impl.f_n_transforms += 1u;
    if (v_transform_type < 2u) {
      if (self->private_impl.f_n_bits < 3u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
        if (self->private_impl.f_n_bits >= 3u) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
          goto exit;
        }
        self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
        self->private_impl.f_n_bits += 8u;
      }
      v_tile_size_log2 = ((self->private_impl.f_bits & 7u) + 2u);
      self->private_impl.f_transform_tile_size_log2[v_transform_type] = ((uint8_t)(v_tile_size_log2));
      self->private_impl.f_bits >>= 3u;
      self->private_impl.f_n_bits -= 3u;
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      status = wuffs_webp__decoder__decode_color_cache_parameters(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
      status = wuffs_webp__decoder__decode_huffman_groups(self, a_src, 1u);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      while (true) {
        if ((((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[(v_transform_type + 1u)])) > ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[(v_transform_type + 2u)]))) || (((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[(v_transform_type + 2u)])) > ((uint64_t)(a_workbuf.len)))) {
          status = wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
          goto exit;
        }
        {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          wuffs_base__status t_2 = wuffs_webp__decoder__decode_pixels(self,
              wuffs_base__slice_u8__subslice_ij(a_workbuf,
              ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[(v_transform_type + 1u)])),
              ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[(v_transform_type + 2u)]))),
              a_src,
              ((self->private_impl.f_width + ((((uint32_t)(1u)) << v_tile_size_log2) - 1u)) >> v_tile_size_log2),
              ((self->private_impl.f_height + ((((uint32_t)(1u)) << v_tile_size_log2) - 1u)) >> v_tile_size_log2),
              wuffs_base__utility__empty_slice_u8(),
              0u);
          v_status = t_2;
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        if (wuffs_base__status__is_ok(&v_status)) {
          break;
        }
        status = v_status;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
      }
    } else if (v_transform_type == 2u) {
    } else {
      if (self->private_impl.f_n_bits < 8u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_3 = *iop_a_src++;
          v_c8 = t_3;
        }
        if (self->private_impl.f_n_bits >= 8u) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
          goto exit;
        }
        self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
        self->private_impl.f_n_bits += 8u;
      }
      self->private_impl.f_color_indexing_palette_size = ((self->private_impl.f_bits & 255u) + 1u);
      self->private_impl.f_bits >>= 8u;
      self->private_impl.f_n_bits -= 8u;
      if (self->private_impl.f_color_indexing_palette_size <= 2u) {
        self->private_impl.f_color_indexing_width = ((self->private_impl.f_width + 7u) / 8u);
        self->private_impl.f_transform_tile_size_log2[3u] = 3u;
      } else if (self->private_impl.f_color_indexing_palette_size <= 4u) {
        self->private_impl.f_color_indexing_width = ((self->private_impl.f_width + 3u) / 4u);
        self->private_impl.f_transform_tile_size_log2[3u] = 2u;
      } else if (self->private_impl.f_color_indexing_palette_size <= 16u) {
        self->private_impl.f_color_indexing_width = ((self->private_impl.f_width + 1u) / 2u);
        self->private_impl.f_transform_tile_size_log2[3u] = 1u;
      } else {
        self->private_impl.f_color_indexing_width = self->private_impl.f_width;
        self->private_impl.f_transform_tile_size_log2[3u] = 0u;
      }
      if (self->private_impl.f_width >= self->private_impl.f_color_indexing_width) {
        self->private_impl.f_workbuf_offset_for_color_indexing = (4u * (self->private_impl.f_width - self->private_impl.f_color_indexing_width) * self->private_impl.f_height);
      }
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
      status = wuffs_webp__decoder__decode_color_cache_parameters(self, a_src);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
      status = wuffs_webp__decoder__decode_huffman_groups(self, a_src, 1u);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      if (a_src) {
        a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
      }
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
      status = wuffs_webp__decoder__decode_pixels(self,
          wuffs_base__make_slice_u8(self->private_data.f_palette, (4u * self->private_impl.f_color_indexing_palette_size)),
          a_src,
          self->private_impl.f_color_indexing_palette_size,
          1u,
          wuffs_base__utility__empty_slice_u8(),
          0u);
      if (a_src) {
        iop_a_src = a_src->data.ptr + a_src->meta.ri;
      }
      if (status.repr) {
        goto suspend;
      }
      wuffs_private_impl__bulk_memset(&self->private_data.f_palette[(4u * self->private_impl.f_color_indexing_palette_size)], (1024u - (4u * self->private_impl.f_color_indexing_palette_size)), 0u);
      v_p = wuffs_base__make_slice_u8(self->private_data.f_palette, (4u * self->private_impl.f_color_indexing_palette_size));
      while (((uint64_t)(v_p.len)) >= 8u) {
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_p.ptr[4u] += v_p.ptr[0u];
        v_p.ptr[5u] += v_p.ptr[1u];
        v_p.ptr[6u] += v_p.ptr[2u];
        v_p.ptr[7u] += v_p.ptr[3u];
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        v_p = wuffs_base__slice_u8__subslice_i(v_p, 4u);
      }
    }

    ok:
    self->private_impl.p_decode_transform = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_transform = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_transform.v_transform_type = v_transform_type;
  self->private_data.s_decode_transform.v_tile_size_log2 = v_tile_size_log2;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.decode_color_cache_parameters

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_color_cache_parameters(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_use_color_cache = 0;
  uint32_t v_color_cache_bits = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_color_cache_parameters;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_n_bits < 1u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      self->private_impl.f_bits = ((uint32_t)(v_c8));
      self->private_impl.f_n_bits = 8u;
    }
    v_use_color_cache = (self->private_impl.f_bits & 1u);
    self->private_impl.f_bits >>= 1u;
    self->private_impl.f_n_bits -= 1u;
    self->private_impl.f_color_cache_bits = 0u;
    if (v_use_color_cache != 0u) {
      if (self->private_impl.f_n_bits < 4u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
        if (self->private_impl.f_n_bits >= 4u) {
          status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
          goto exit;
        }
        self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
        self->private_impl.f_n_bits += 8u;
      }
      v_color_cache_bits = (self->private_impl.f_bits & 15u);
      self->private_impl.f_bits >>= 4u;
      self->private_impl.f_n_bits -= 4u;
      if ((v_color_cache_bits < 1u) || (11u < v_color_cache_bits)) {
        status = wuffs_base__make_status(wuffs_webp__error__bad_color_cache);
        goto exit;
      }
      self->private_impl.f_color_cache_bits = v_color_cache_bits;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_color_cache_parameters = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_color_cache_parameters = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.decode_hg_table

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_hg_table(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_src,
    uint32_t a_width,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint8_t v_c8 = 0;
  uint32_t v_use_hg_table = 0;
  uint32_t v_tile_size_log2 = 0;
  wuffs_base__slice_u8 v_hg_pixels = {0};
  uint64_t v_n = 0;
  wuffs_base__slice_u8 v_p = {0};
  uint32_t v_hg_plus_1 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_hg_table;
  if (coro_susp_point) {
    v_tile_size_log2 = self->private_data.s_decode_hg_table.v_tile_size_log2;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if (self->private_impl.f_n_bits < 1u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      self->private_impl.f_bits = ((uint32_t)(v_c8));
      self->private_impl.f_n_bits = 8u;
    }
    v_use_hg_table = (self->private_impl.f_bits & 1u);
    self->private_impl.f_bits >>= 1u;
    self->private_impl.f_n_bits -= 1u;
    if (v_use_hg_table == 0u) {
      self->private_impl.f_overall_n_huffman_groups = 1u;
      self->private_impl.f_overall_tile_size_log2 = 0u;
      if ((((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])) > ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u]))) || (((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u])) > ((uint64_t)(a_workbuf.len)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
        goto exit;
      }
      v_hg_pixels = wuffs_base__slice_u8__subslice_ij(a_workbuf,
          ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])),
          ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u])));
      if (((uint64_t)(v_hg_pixels.len)) >= 4u) {
        v_hg_pixels.ptr[0u] = 0u;
        v_hg_pixels.ptr[1u] = 0u;
        v_hg_pixels.ptr[2u] = 0u;
        v_hg_pixels.ptr[3u] = 0u;
      }
      status = wuffs_base__make_status(NULL);
      goto ok;
    }
    if (self->private_impl.f_n_bits < 3u) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_1 = *iop_a_src++;
        v_c8 = t_1;
      }
      if (self->private_impl.f_n_bits >= 3u) {
        status = wuffs_base__make_status(wuffs_webp__error__internal_error_inconsistent_n_bits);
        goto exit;
      }
      self->private_impl.f_bits |= (((uint32_t)(v_c8)) << self->private_impl.f_n_bits);
      self->private_impl.f_n_bits += 8u;
    }
    v_tile_size_log2 = ((self->private_impl.f_bits & 7u) + 2u);
    self->private_impl.f_bits >>= 3u;
    self->private_impl.f_n_bits -= 3u;
    self->private_impl.f_overall_tile_size_log2 = v_tile_size_log2;
    if (a_src) {
      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
    status = wuffs_webp__decoder__decode_color_cache_parameters(self, a_src);
    if (a_src) {
      iop_a_src = a_src->data.ptr + a_src->meta.ri;
    }
    if (status.repr) {
      goto suspend;
    }
    if (a_src) {
      a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
    status = wuffs_webp__decoder__decode_huffman_groups(self, a_src, 1u);
    if (a_src) {
      iop_a_src = a_src->data.ptr + a_src->meta.ri;
    }
    if (status.repr) {
      goto suspend;
    }
    while (true) {
      if ((((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])) > ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u]))) || (((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u])) > ((uint64_t)(a_workbuf.len)))) {
        status = wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
        goto exit;
      }
      {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        wuffs_base__status t_2 = wuffs_webp__decoder__decode_pixels(self,
            wuffs_base__slice_u8__subslice_ij(a_workbuf,
            ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])),
            ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u]))),
            a_src,
            ((a_width + ((((uint32_t)(1u)) << v_tile_size_log2) - 1u)) >> v_tile_size_log2),
            ((self->private_impl.f_height + ((((uint32_t)(1u)) << v_tile_size_log2) - 1u)) >> v_tile_size_log2),
            wuffs_base__utility__empty_slice_u8(),
            0u);
        v_status = t_2;
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
      }
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
    }
    self->private_impl.f_overall_n_huffman_groups = 1u;
    if ((((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])) > ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u]))) || (((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u])) > ((uint64_t)(a_workbuf.len)))) {
      status = wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
      goto exit;
    }
    v_hg_pixels = wuffs_base__slice_u8__subslice_ij(a_workbuf,
        ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[0u])),
        ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[1u])));
    v_n = ((uint64_t)((((a_width + ((((uint32_t)(1u)) << v_tile_size_log2) - 1u)) >> v_tile_size_log2) * ((self->private_impl.f_height + ((((uint32_t)(1u)) << v_tile_size_log2) - 1u)) >> v_tile_size_log2) * 4u)));
    if (v_n > ((uint64_t)(v_hg_pixels.len))) {
      status = wuffs_base__make_status(wuffs_base__error__bad_workbuf_length);
      goto exit;
    }
    v_p = wuffs_base__slice_u8__subslice_j(v_hg_pixels, v_n);
    while (((uint64_t)(v_p.len)) >= 4u) {
      if (v_p.ptr[2u] != 0u) {
        status = wuffs_base__make_status(wuffs_webp__error__unsupported_number_of_huffman_groups);
        goto exit;
      }
      v_hg_plus_1 = (((uint32_t)(v_p.ptr[1u])) + 1u);
      if (self->private_impl.f_overall_n_huffman_groups < v_hg_plus_1) {
        self->private_impl.f_overall_n_huffman_groups = v_hg_plus_1;
      }
      v_p = wuffs_base__slice_u8__subslice_i(v_p, 4u);
    }

    ok:
    self->private_impl.p_decode_hg_table = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_hg_table = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_hg_table.v_tile_size_log2 = v_tile_size_log2;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func webp.decoder.decode_pixels

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__decode_pixels(
    wuffs_webp__decoder* self,
    wuffs_base__slice_u8 a_dst,
    wuffs_base__io_buffer* a_src,
    uint32_t a_width,
    uint32_t a_height,
    wuffs_base__slice_u8 a_tile_data,
    uint32_t a_tile_size_log2) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_i = 0;
  uint32_t v_n = 0;

  uint32_t coro_susp_point = self->private_impl.p_decode_pixels;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    v_i = 0u;
    v_n = (((uint32_t)(1u)) << self->private_impl.f_color_cache_bits);
    while (v_i < v_n) {
      self->private_data.f_color_cache[v_i] = 0u;
      v_i += 1u;
    }
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
    status = wuffs_webp__decoder__decode_pixels_slow(self,
        a_dst,
        a_src,
        a_width,
        a_height,
        a_tile_data,
        a_tile_size_log2);
    if (status.repr) {
      goto suspend;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_pixels = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_pixels = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  return status;
}

// -------- func webp.decoder.swizzle

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_webp__decoder__swizzle(
    wuffs_webp__decoder* self,
    wuffs_base__pixel_buffer* a_dst,
    wuffs_base__slice_u8 a_src,
    wuffs_base__pixel_blend a_blend) {
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  wuffs_base__pixel_format v_dst_pixfmt = {0};
  uint32_t v_dst_bits_per_pixel = 0;
  uint32_t v_dst_bytes_per_pixel = 0;
  uint64_t v_dst_bytes_per_row = 0;
  wuffs_base__slice_u8 v_dst_palette = {0};
  wuffs_base__table_u8 v_tab = {0};
  uint64_t v_src_bytes_per_row = 0;
  wuffs_base__slice_u8 v_dst = {0};
  uint32_t v_y = 0;

  v_status = wuffs_base__pixel_swizzler__prepare(&self->private_impl.f_swizzler,
      wuffs_base__pixel_buffer__pixel_format(a_dst),
      wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_palette, 1024)),
      wuffs_base__utility__make_pixel_format(self->private_impl.f_pixfmt),
      wuffs_base__utility__empty_slice_u8(),
      a_blend);
  if ( ! wuffs_base__status__is_ok(&v_status)) {
    return wuffs_private_impl__status__ensure_not_a_suspension(v_status);
  }
  v_dst_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_dst);
  v_dst_bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&v_dst_pixfmt);
  if ((v_dst_bits_per_pixel & 7u) != 0u) {
    return wuffs_base__make_status(wuffs_base__error__unsupported_option);
  }
  v_dst_bytes_per_pixel = (v_dst_bits_per_pixel / 8u);
  v_dst_bytes_per_row = ((uint64_t)((self->private_impl.f_width * v_dst_bytes_per_pixel)));
  v_dst_palette = wuffs_base__pixel_buffer__palette_or_else(a_dst, wuffs_base__make_slice_u8(self->private_data.f_palette, 1024));
  v_tab = wuffs_base__pixel_buffer__plane(a_dst, 0u);
  v_src_bytes_per_row = ((uint64_t)((self->private_impl.f_width * 4u)));
  while (v_src_bytes_per_row <= ((uint64_t)(a_src.len))) {
    v_dst = wuffs_private_impl__table_u8__row_u32(v_tab, v_y);
    if (v_dst_bytes_per_row < ((uint64_t)(v_dst.len))) {
      v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_dst_bytes_per_row);
    }
    wuffs_base__pixel_swizzler__swizzle_interleaved_from_slice(&self->private_impl.f_swizzler, v_dst, v_dst_palette, wuffs_base__slice_u8__subslice_j(a_src, v_src_bytes_per_row));
    a_src = wuffs_base__slice_u8__subslice_i(a_src, v_src_bytes_per_row);
    v_y += 1u;
  }
  return wuffs_base__make_status(NULL);
}

// -------- func webp.decoder.frame_dirty_rect

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32
wuffs_webp__decoder__frame_dirty_rect(
    const wuffs_webp__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_rect_ie_u32();
  }

  if (self->private_impl.f_is_vp8_lossy) {
    return wuffs_vp8__decoder__frame_dirty_rect(&self->private_data.f_vp8);
  }
  return wuffs_base__utility__make_rect_ie_u32(
      0u,
      0u,
      self->private_impl.f_width,
      self->private_impl.f_height);
}

// -------- func webp.decoder.num_animation_loops

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_webp__decoder__num_animation_loops(
    const wuffs_webp__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func webp.decoder.num_decoded_frame_configs

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_webp__decoder__num_decoded_frame_configs(
    const wuffs_webp__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_is_vp8_lossy) {
    return wuffs_vp8__decoder__num_decoded_frame_configs(&self->private_data.f_vp8);
  }
  if (self->private_impl.f_call_sequence > 32u) {
    return 1u;
  }
  return 0u;
}

// -------- func webp.decoder.num_decoded_frames

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_webp__decoder__num_decoded_frames(
    const wuffs_webp__decoder* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (self->private_impl.f_is_vp8_lossy) {
    return wuffs_vp8__decoder__num_decoded_frames(&self->private_data.f_vp8);
  }
  if (self->private_impl.f_call_sequence > 64u) {
    return 1u;
  }
  return 0u;
}

// -------- func webp.decoder.restart_frame

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__restart_frame(
    wuffs_webp__decoder* self,
    uint64_t a_index,
    uint64_t a_io_position) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  if (self->private_impl.f_is_vp8_lossy) {
    v_status = wuffs_vp8__decoder__restart_frame(&self->private_data.f_vp8, a_index, a_io_position);
    return wuffs_private_impl__status__ensure_not_a_suspension(v_status);
  }
  if (self->private_impl.f_call_sequence < 32u) {
    return wuffs_base__make_status(wuffs_base__error__bad_call_sequence);
  }
  if ((a_index != 0u) || (a_io_position != self->private_impl.f_frame_config_io_position)) {
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  self->private_impl.f_call_sequence = 40u;
  return wuffs_base__make_status(NULL);
}

// -------- func webp.decoder.set_report_metadata

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_webp__decoder__set_report_metadata(
    wuffs_webp__decoder* self,
    uint32_t a_fourcc,
    bool a_report) {
  return wuffs_base__make_empty_struct();
}

// -------- func webp.decoder.tell_me_more

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_webp__decoder__tell_me_more(
    wuffs_webp__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__more_information* a_minfo,
    wuffs_base__io_buffer* a_src) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 4)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  status = wuffs_base__make_status(wuffs_base__error__no_more_information);
  goto exit;

  goto ok;
  ok:
  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func webp.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_webp__decoder__workbuf_len(
    const wuffs_webp__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  if (self->private_impl.f_is_vp8_lossy) {
    return wuffs_vp8__decoder__workbuf_len(&self->private_data.f_vp8);
  }
  return wuffs_base__utility__make_range_ii_u64(((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[3u])), ((uint64_t)(self->private_impl.f_workbuf_offset_for_transform[3u])));
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WEBP)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XXHASH32)

// ---------------- Status Codes Implementations

// ---------------- Private Consts

#define WUFFS_XXHASH32__XXH_PRIME32_1 2654435761u

#define WUFFS_XXHASH32__XXH_PRIME32_2 2246822519u

#define WUFFS_XXHASH32__XXH_PRIME32_3 3266489917u

#define WUFFS_XXHASH32__XXH_PRIME32_4 668265263u

#define WUFFS_XXHASH32__XXH_PRIME32_5 374761393u

#define WUFFS_XXHASH32__INITIAL_V0 606290984u

#define WUFFS_XXHASH32__INITIAL_V1 2246822519u

#define WUFFS_XXHASH32__INITIAL_V2 0u

#define WUFFS_XXHASH32__INITIAL_V3 1640531535u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_xxhash32__hasher__up(
    wuffs_xxhash32__hasher* self,
    wuffs_base__slice_u8 a_x);

// ---------------- VTables

const wuffs_base__hasher_u32__func_ptrs
wuffs_xxhash32__hasher__func_ptrs_for__wuffs_base__hasher_u32 = {
  (uint32_t(*)(const void*))(&wuffs_xxhash32__hasher__checksum_u32),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_xxhash32__hasher__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_xxhash32__hasher__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      wuffs_base__slice_u8))(&wuffs_xxhash32__hasher__update),
  (uint32_t(*)(void*,
      wuffs_base__slice_u8))(&wuffs_xxhash32__hasher__update_u32),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_xxhash32__hasher__initialize(
    wuffs_xxhash32__hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__hasher_u32.vtable_name =
      wuffs_base__hasher_u32__vtable_name;
  self->private_impl.vtable_for__wuffs_base__hasher_u32.function_pointers =
      (const void*)(&wuffs_xxhash32__hasher__func_ptrs_for__wuffs_base__hasher_u32);
  return wuffs_base__make_status(NULL);
}

wuffs_xxhash32__hasher*
wuffs_xxhash32__hasher__alloc(void) {
  wuffs_xxhash32__hasher* x =
      (wuffs_xxhash32__hasher*)(calloc(1, sizeof(wuffs_xxhash32__hasher)));
  if (!x) {
    return NULL;
  }
  if (wuffs_xxhash32__hasher__initialize(
      x, sizeof(wuffs_xxhash32__hasher), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_xxhash32__hasher(void) {
  return sizeof(wuffs_xxhash32__hasher);
}

// ---------------- Function Implementations

// -------- func xxhash32.hasher.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xxhash32__hasher__get_quirk(
    const wuffs_xxhash32__hasher* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func xxhash32.hasher.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_xxhash32__hasher__set_quirk(
    wuffs_xxhash32__hasher* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func xxhash32.hasher.update

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_xxhash32__hasher__update(
    wuffs_xxhash32__hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  wuffs_base__slice_u8 v_remaining = {0};

  if ((self->private_impl.f_length_modulo_u32 == 0u) &&  ! self->private_impl.f_length_overflows_u32) {
    self->private_impl.f_v0 = 606290984u;
    self->private_impl.f_v1 = 2246822519u;
    self->private_impl.f_v2 = 0u;
    self->private_impl.f_v3 = 1640531535u;
  }
  while (((uint64_t)(a_x.len)) > 0u) {
    v_remaining = wuffs_base__slice_u8__subslice_j(a_x, 0u);
    if (((uint64_t)(a_x.len)) > 16777216u) {
      v_remaining = wuffs_base__slice_u8__subslice_i(a_x, 16777216u);
      a_x = wuffs_base__slice_u8__subslice_j(a_x, 16777216u);
    }
    wuffs_xxhash32__hasher__up(self, a_x);
    a_x = v_remaining;
  }
  return wuffs_base__make_empty_struct();
}

// -------- func xxhash32.hasher.update_u32

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_xxhash32__hasher__update_u32(
    wuffs_xxhash32__hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return 0;
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return 0;
  }

  wuffs_xxhash32__hasher__update(self, a_x);
  return wuffs_xxhash32__hasher__checksum_u32(self);
}

// -------- func xxhash32.hasher.up

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_xxhash32__hasher__up(
    wuffs_xxhash32__hasher* self,
    wuffs_base__slice_u8 a_x) {
  uint32_t v_new_lmu = 0;
  uint32_t v_buf_u32 = 0;
  uint32_t v_buf_len = 0;
  uint32_t v_v0 = 0;
  uint32_t v_v1 = 0;
  uint32_t v_v2 = 0;
  uint32_t v_v3 = 0;
  wuffs_base__slice_u8 v_p = {0};

  v_new_lmu = ((uint32_t)(self->private_impl.f_length_modulo_u32 + ((uint32_t)(((uint64_t)(a_x.len))))));
  self->private_impl.f_length_overflows_u32 = ((v_new_lmu < self->private_impl.f_length_modulo_u32) || self->private_impl.f_length_overflows_u32);
  self->private_impl.f_length_modulo_u32 = v_new_lmu;
  while (true) {
    if (self->private_impl.f_buf_len >= 16u) {
      v_buf_u32 = (((uint32_t)(self->private_impl.f_buf_data[0u])) |
          (((uint32_t)(self->private_impl.f_buf_data[1u])) << 8u) |
          (((uint32_t)(self->private_impl.f_buf_data[2u])) << 16u) |
          (((uint32_t)(self->private_impl.f_buf_data[3u])) << 24u));
      v_v0 = ((uint32_t)(self->private_impl.f_v0 + ((uint32_t)(v_buf_u32 * 2246822519u))));
      v_v0 = (((uint32_t)(v_v0 << 13u)) | (v_v0 >> 19u));
      self->private_impl.f_v0 = ((uint32_t)(v_v0 * 2654435761u));
      v_buf_u32 = (((uint32_t)(self->private_impl.f_buf_data[4u])) |
          (((uint32_t)(self->private_impl.f_buf_data[5u])) << 8u) |
          (((uint32_t)(self->private_impl.f_buf_data[6u])) << 16u) |
          (((uint32_t)(self->private_impl.f_buf_data[7u])) << 24u));
      v_v1 = ((uint32_t)(self->private_impl.f_v1 + ((uint32_t)(v_buf_u32 * 2246822519u))));
      v_v1 = (((uint32_t)(v_v1 << 13u)) | (v_v1 >> 19u));
      self->private_impl.f_v1 = ((uint32_t)(v_v1 * 2654435761u));
      v_buf_u32 = (((uint32_t)(self->private_impl.f_buf_data[8u])) |
          (((uint32_t)(self->private_impl.f_buf_data[9u])) << 8u) |
          (((uint32_t)(self->private_impl.f_buf_data[10u])) << 16u) |
          (((uint32_t)(self->private_impl.f_buf_data[11u])) << 24u));
      v_v2 = ((uint32_t)(self->private_impl.f_v2 + ((uint32_t)(v_buf_u32 * 2246822519u))));
      v_v2 = (((uint32_t)(v_v2 << 13u)) | (v_v2 >> 19u));
      self->private_impl.f_v2 = ((uint32_t)(v_v2 * 2654435761u));
      v_buf_u32 = (((uint32_t)(self->private_impl.f_buf_data[12u])) |
          (((uint32_t)(self->private_impl.f_buf_data[13u])) << 8u) |
          (((uint32_t)(self->private_impl.f_buf_data[14u])) << 16u) |
          (((uint32_t)(self->private_impl.f_buf_data[15u])) << 24u));
      v_v3 = ((uint32_t)(self->private_impl.f_v3 + ((uint32_t)(v_buf_u32 * 2246822519u))));
      v_v3 = (((uint32_t)(v_v3 << 13u)) | (v_v3 >> 19u));
      self->private_impl.f_v3 = ((uint32_t)(v_v3 * 2654435761u));
      self->private_impl.f_buf_len = 0u;
      break;
    }
    if (((uint64_t)(a_x.len)) <= 0u) {
      return wuffs_base__make_empty_struct();
    }
    self->private_impl.f_buf_data[self->private_impl.f_buf_len] = a_x.ptr[0u];
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
    self->private_impl.f_buf_len += 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 1u);
  }
  v_buf_len = ((uint32_t)(((uint8_t)(self->private_impl.f_buf_len & 15u))));
  v_v0 = self->private_impl.f_v0;
  v_v1 = self->private_impl.f_v1;
  v_v2 = self->private_impl.f_v2;
  v_v3 = self->private_impl.f_v3;
  {
    wuffs_base__slice_u8 i_slice_p = a_x;
    v_p.ptr = i_slice_p.ptr;
    v_p.len = 16;
    const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 16) * 16));
    while (v_p.ptr < i_end0_p) {
      v_buf_u32 = (((uint32_t)(v_p.ptr[0u])) |
          (((uint32_t)(v_p.ptr[1u])) << 8u) |
          (((uint32_t)(v_p.ptr[2u])) << 16u) |
          (((uint32_t)(v_p.ptr[3u])) << 24u));
      v_v0 = ((uint32_t)(v_v0 + ((uint32_t)(v_buf_u32 * 2246822519u))));
      v_v0 = (((uint32_t)(v_v0 << 13u)) | (v_v0 >> 19u));
      v_v0 = ((uint32_t)(v_v0 * 2654435761u));
      v_buf_u32 = (((uint32_t)(v_p.ptr[4u])) |
          (((uint32_t)(v_p.ptr[5u])) << 8u) |
          (((uint32_t)(v_p.ptr[6u])) << 16u) |
          (((uint32_t)(v_p.ptr[7u])) << 24u));
      v_v1 = ((uint32_t)(v_v1 + ((uint32_t)(v_buf_u32 * 2246822519u))));
      v_v1 = (((uint32_t)(v_v1 << 13u)) | (v_v1 >> 19u));
      v_v1 = ((uint32_t)(v_v1 * 2654435761u));
      v_buf_u32 = (((uint32_t)(v_p.ptr[8u])) |
          (((uint32_t)(v_p.ptr[9u])) << 8u) |
          (((uint32_t)(v_p.ptr[10u])) << 16u) |
          (((uint32_t)(v_p.ptr[11u])) << 24u));
      v_v2 = ((uint32_t)(v_v2 + ((uint32_t)(v_buf_u32 * 2246822519u))));
      v_v2 = (((uint32_t)(v_v2 << 13u)) | (v_v2 >> 19u));
      v_v2 = ((uint32_t)(v_v2 * 2654435761u));
      v_buf_u32 = (((uint32_t)(v_p.ptr[12u])) |
          (((uint32_t)(v_p.ptr[13u])) << 8u) |
          (((uint32_t)(v_p.ptr[14u])) << 16u) |
          (((uint32_t)(v_p.ptr[15u])) << 24u));
      v_v3 = ((uint32_t)(v_v3 + ((uint32_t)(v_buf_u32 * 2246822519u))));
      v_v3 = (((uint32_t)(v_v3 << 13u)) | (v_v3 >> 19u));
      v_v3 = ((uint32_t)(v_v3 * 2654435761u));
      v_p.ptr += 16;
    }
    v_p.len = 1;
    const uint8_t* i_end1_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
    while (v_p.ptr < i_end1_p) {
      self->private_impl.f_buf_data[v_buf_len] = v_p.ptr[0u];
      v_buf_len = ((v_buf_len + 1u) & 15u);
      v_p.ptr += 1;
    }
    v_p.len = 0;
  }
  self->private_impl.f_buf_len = ((uint8_t)(v_buf_len));
  self->private_impl.f_v0 = v_v0;
  self->private_impl.f_v1 = v_v1;
  self->private_impl.f_v2 = v_v2;
  self->private_impl.f_v3 = v_v3;
  return wuffs_base__make_empty_struct();
}

// -------- func xxhash32.hasher.checksum_u32

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint32_t
wuffs_xxhash32__hasher__checksum_u32(
    const wuffs_xxhash32__hasher* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  uint32_t v_ret = 0;
  uint32_t v_i = 0;
  uint32_t v_n = 0;
  uint32_t v_buf_u32 = 0;

  if ((self->private_impl.f_length_modulo_u32 >= 16u) || self->private_impl.f_length_overflows_u32) {
    v_ret += (((uint32_t)(self->private_impl.f_v0 << 1u)) | (self->private_impl.f_v0 >> 31u));
    v_ret += (((uint32_t)(self->private_impl.f_v1 << 7u)) | (self->private_impl.f_v1 >> 25u));
    v_ret += (((uint32_t)(self->private_impl.f_v2 << 12u)) | (self->private_impl.f_v2 >> 20u));
    v_ret += (((uint32_t)(self->private_impl.f_v3 << 18u)) | (self->private_impl.f_v3 >> 14u));
    v_ret += self->private_impl.f_length_modulo_u32;
  } else {
    v_ret += 374761393u;
    v_ret += self->private_impl.f_length_modulo_u32;
  }
  v_n = 16u;
  v_n = wuffs_base__u32__min(v_n, ((uint32_t)(self->private_impl.f_buf_len)));
  if (4u <= v_n) {
    v_buf_u32 = (((uint32_t)(self->private_impl.f_buf_data[0u])) |
        (((uint32_t)(self->private_impl.f_buf_data[1u])) << 8u) |
        (((uint32_t)(self->private_impl.f_buf_data[2u])) << 16u) |
        (((uint32_t)(self->private_impl.f_buf_data[3u])) << 24u));
    v_ret += ((uint32_t)(v_buf_u32 * 3266489917u));
    v_ret = (((uint32_t)(v_ret << 17u)) | (v_ret >> 15u));
    v_ret *= 668265263u;
    v_i = 4u;
  }
  if (8u <= v_n) {
    v_buf_u32 = (((uint32_t)(self->private_impl.f_buf_data[4u])) |
        (((uint32_t)(self->private_impl.f_buf_data[5u])) << 8u) |
        (((uint32_t)(self->private_impl.f_buf_data[6u])) << 16u) |
        (((uint32_t)(self->private_impl.f_buf_data[7u])) << 24u));
    v_ret += ((uint32_t)(v_buf_u32 * 3266489917u));
    v_ret = (((uint32_t)(v_ret << 17u)) | (v_ret >> 15u));
    v_ret *= 668265263u;
    v_i = 8u;
  }
  if (12u <= v_n) {
    v_buf_u32 = (((uint32_t)(self->private_impl.f_buf_data[8u])) |
        (((uint32_t)(self->private_impl.f_buf_data[9u])) << 8u) |
        (((uint32_t)(self->private_impl.f_buf_data[10u])) << 16u) |
        (((uint32_t)(self->private_impl.f_buf_data[11u])) << 24u));
    v_ret += ((uint32_t)(v_buf_u32 * 3266489917u));
    v_ret = (((uint32_t)(v_ret << 17u)) | (v_ret >> 15u));
    v_ret *= 668265263u;
    v_i = 12u;
  }
  while (v_i < v_n) {
    v_ret += ((uint32_t)(((uint32_t)(self->private_impl.f_buf_data[v_i])) * 374761393u));
    v_ret = (((uint32_t)(v_ret << 11u)) | (v_ret >> 21u));
    v_ret *= 2654435761u;
    v_i += 1u;
  }
  v_ret ^= (v_ret >> 15u);
  v_ret *= 2246822519u;
  v_ret ^= (v_ret >> 13u);
  v_ret *= 3266489917u;
  v_ret ^= (v_ret >> 16u);
  return v_ret;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XXHASH32)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XXHASH64)

// ---------------- Status Codes Implementations

// ---------------- Private Consts

#define WUFFS_XXHASH64__XXH_PRIME64_1 11400714785074694791u

#define WUFFS_XXHASH64__XXH_PRIME64_2 14029467366897019727u

#define WUFFS_XXHASH64__XXH_PRIME64_3 1609587929392839161u

#define WUFFS_XXHASH64__XXH_PRIME64_4 9650029242287828579u

#define WUFFS_XXHASH64__XXH_PRIME64_5 2870177450012600261u

#define WUFFS_XXHASH64__INITIAL_V0 6983438078262162902u

#define WUFFS_XXHASH64__INITIAL_V1 14029467366897019727u

#define WUFFS_XXHASH64__INITIAL_V2 0u

#define WUFFS_XXHASH64__INITIAL_V3 7046029288634856825u

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_xxhash64__hasher__up(
    wuffs_xxhash64__hasher* self,
    wuffs_base__slice_u8 a_x);

// ---------------- VTables

const wuffs_base__hasher_u64__func_ptrs
wuffs_xxhash64__hasher__func_ptrs_for__wuffs_base__hasher_u64 = {
  (uint64_t(*)(const void*))(&wuffs_xxhash64__hasher__checksum_u64),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_xxhash64__hasher__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_xxhash64__hasher__set_quirk),
  (wuffs_base__empty_struct(*)(void*,
      wuffs_base__slice_u8))(&wuffs_xxhash64__hasher__update),
  (uint64_t(*)(void*,
      wuffs_base__slice_u8))(&wuffs_xxhash64__hasher__update_u64),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_xxhash64__hasher__initialize(
    wuffs_xxhash64__hasher* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__hasher_u64.vtable_name =
      wuffs_base__hasher_u64__vtable_name;
  self->private_impl.vtable_for__wuffs_base__hasher_u64.function_pointers =
      (const void*)(&wuffs_xxhash64__hasher__func_ptrs_for__wuffs_base__hasher_u64);
  return wuffs_base__make_status(NULL);
}

wuffs_xxhash64__hasher*
wuffs_xxhash64__hasher__alloc(void) {
  wuffs_xxhash64__hasher* x =
      (wuffs_xxhash64__hasher*)(calloc(1, sizeof(wuffs_xxhash64__hasher)));
  if (!x) {
    return NULL;
  }
  if (wuffs_xxhash64__hasher__initialize(
      x, sizeof(wuffs_xxhash64__hasher), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_xxhash64__hasher(void) {
  return sizeof(wuffs_xxhash64__hasher);
}

// ---------------- Function Implementations

// -------- func xxhash64.hasher.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xxhash64__hasher__get_quirk(
    const wuffs_xxhash64__hasher* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  return 0u;
}

// -------- func xxhash64.hasher.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_xxhash64__hasher__set_quirk(
    wuffs_xxhash64__hasher* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func xxhash64.hasher.update

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct
wuffs_xxhash64__hasher__update(
    wuffs_xxhash64__hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return wuffs_base__make_empty_struct();
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_empty_struct();
  }

  if ((self->private_impl.f_length_modulo_u64 == 0u) &&  ! self->private_impl.f_length_overflows_u64) {
    self->private_impl.f_v0 = 6983438078262162902u;
    self->private_impl.f_v1 = 14029467366897019727u;
    self->private_impl.f_v2 = 0u;
    self->private_impl.f_v3 = 7046029288634856825u;
  }
  wuffs_xxhash64__hasher__up(self, a_x);
  return wuffs_base__make_empty_struct();
}

// -------- func xxhash64.hasher.update_u64

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xxhash64__hasher__update_u64(
    wuffs_xxhash64__hasher* self,
    wuffs_base__slice_u8 a_x) {
  if (!self) {
    return 0;
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return 0;
  }

  wuffs_xxhash64__hasher__update(self, a_x);
  return wuffs_xxhash64__hasher__checksum_u64(self);
}

// -------- func xxhash64.hasher.up

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__empty_struct
wuffs_xxhash64__hasher__up(
    wuffs_xxhash64__hasher* self,
    wuffs_base__slice_u8 a_x) {
  uint64_t v_new_lmu = 0;
  uint64_t v_buf_u64 = 0;
  uint32_t v_buf_len = 0;
  uint64_t v_v0 = 0;
  uint64_t v_v1 = 0;
  uint64_t v_v2 = 0;
  uint64_t v_v3 = 0;
  wuffs_base__slice_u8 v_p = {0};

  v_new_lmu = ((uint64_t)(self->private_impl.f_length_modulo_u64 + ((uint64_t)(a_x.len))));
  self->private_impl.f_length_overflows_u64 = ((v_new_lmu < self->private_impl.f_length_modulo_u64) || self->private_impl.f_length_overflows_u64);
  self->private_impl.f_length_modulo_u64 = v_new_lmu;
  while (true) {
    if (self->private_impl.f_buf_len >= 32u) {
      v_buf_u64 = (((uint64_t)(self->private_impl.f_buf_data[0u])) |
          (((uint64_t)(self->private_impl.f_buf_data[1u])) << 8u) |
          (((uint64_t)(self->private_impl.f_buf_data[2u])) << 16u) |
          (((uint64_t)(self->private_impl.f_buf_data[3u])) << 24u) |
          (((uint64_t)(self->private_impl.f_buf_data[4u])) << 32u) |
          (((uint64_t)(self->private_impl.f_buf_data[5u])) << 40u) |
          (((uint64_t)(self->private_impl.f_buf_data[6u])) << 48u) |
          (((uint64_t)(self->private_impl.f_buf_data[7u])) << 56u));
      v_v0 = ((uint64_t)(self->private_impl.f_v0 + ((uint64_t)(v_buf_u64 * 14029467366897019727u))));
      v_v0 = (((uint64_t)(v_v0 << 31u)) | (v_v0 >> 33u));
      self->private_impl.f_v0 = ((uint64_t)(v_v0 * 11400714785074694791u));
      v_buf_u64 = (((uint64_t)(self->private_impl.f_buf_data[8u])) |
          (((uint64_t)(self->private_impl.f_buf_data[9u])) << 8u) |
          (((uint64_t)(self->private_impl.f_buf_data[10u])) << 16u) |
          (((uint64_t)(self->private_impl.f_buf_data[11u])) << 24u) |
          (((uint64_t)(self->private_impl.f_buf_data[12u])) << 32u) |
          (((uint64_t)(self->private_impl.f_buf_data[13u])) << 40u) |
          (((uint64_t)(self->private_impl.f_buf_data[14u])) << 48u) |
          (((uint64_t)(self->private_impl.f_buf_data[15u])) << 56u));
      v_v1 = ((uint64_t)(self->private_impl.f_v1 + ((uint64_t)(v_buf_u64 * 14029467366897019727u))));
      v_v1 = (((uint64_t)(v_v1 << 31u)) | (v_v1 >> 33u));
      self->private_impl.f_v1 = ((uint64_t)(v_v1 * 11400714785074694791u));
      v_buf_u64 = (((uint64_t)(self->private_impl.f_buf_data[16u])) |
          (((uint64_t)(self->private_impl.f_buf_data[17u])) << 8u) |
          (((uint64_t)(self->private_impl.f_buf_data[18u])) << 16u) |
          (((uint64_t)(self->private_impl.f_buf_data[19u])) << 24u) |
          (((uint64_t)(self->private_impl.f_buf_data[20u])) << 32u) |
          (((uint64_t)(self->private_impl.f_buf_data[21u])) << 40u) |
          (((uint64_t)(self->private_impl.f_buf_data[22u])) << 48u) |
          (((uint64_t)(self->private_impl.f_buf_data[23u])) << 56u));
      v_v2 = ((uint64_t)(self->private_impl.f_v2 + ((uint64_t)(v_buf_u64 * 14029467366897019727u))));
      v_v2 = (((uint64_t)(v_v2 << 31u)) | (v_v2 >> 33u));
      self->private_impl.f_v2 = ((uint64_t)(v_v2 * 11400714785074694791u));
      v_buf_u64 = (((uint64_t)(self->private_impl.f_buf_data[24u])) |
          (((uint64_t)(self->private_impl.f_buf_data[25u])) << 8u) |
          (((uint64_t)(self->private_impl.f_buf_data[26u])) << 16u) |
          (((uint64_t)(self->private_impl.f_buf_data[27u])) << 24u) |
          (((uint64_t)(self->private_impl.f_buf_data[28u])) << 32u) |
          (((uint64_t)(self->private_impl.f_buf_data[29u])) << 40u) |
          (((uint64_t)(self->private_impl.f_buf_data[30u])) << 48u) |
          (((uint64_t)(self->private_impl.f_buf_data[31u])) << 56u));
      v_v3 = ((uint64_t)(self->private_impl.f_v3 + ((uint64_t)(v_buf_u64 * 14029467366897019727u))));
      v_v3 = (((uint64_t)(v_v3 << 31u)) | (v_v3 >> 33u));
      self->private_impl.f_v3 = ((uint64_t)(v_v3 * 11400714785074694791u));
      self->private_impl.f_buf_len = 0u;
      break;
    }
    if (((uint64_t)(a_x.len)) <= 0u) {
      return wuffs_base__make_empty_struct();
    }
    self->private_impl.f_buf_data[self->private_impl.f_buf_len] = a_x.ptr[0u];
    self->private_impl.f_buf_len += 1u;
    a_x = wuffs_base__slice_u8__subslice_i(a_x, 1u);
  }
  v_buf_len = (self->private_impl.f_buf_len & 31u);
  v_v0 = self->private_impl.f_v0;
  v_v1 = self->private_impl.f_v1;
  v_v2 = self->private_impl.f_v2;
  v_v3 = self->private_impl.f_v3;
  {
    wuffs_base__slice_u8 i_slice_p = a_x;
    v_p.ptr = i_slice_p.ptr;
    v_p.len = 32;
    const uint8_t* i_end0_p = wuffs_private_impl__ptr_u8_plus_len(v_p.ptr, (((i_slice_p.len - (size_t)(v_p.ptr - i_slice_p.ptr)) / 32) * 32));
    while (v_p.ptr < i_end0_p) {
      v_buf_u64 = (((uint64_t)(v_p.ptr[0u])) |
          (((uint64_t)(v_p.ptr[1u])) << 8u) |
          (((uint64_t)(v_p.ptr[2u])) << 16u) |
          (((uint64_t)(v_p.ptr[3u])) << 24u) |
          (((uint64_t)(v_p.ptr[4u])) << 32u) |
          (((uint64_t)(v_p.ptr[5u])) << 40u) |
          (((uint64_t)(v_p.ptr[6u])) << 48u) |
          (((uint64_t)(v_p.ptr[7u])) << 56u));
      v_v0 = ((uint64_t)(v_v0 + ((uint64_t)(v_buf_u64 * 14029467366897019727u))));
      v_v0 = (((uint64_t)(v_v0 << 31u)) | (v_v0 >> 33u));
      v_v0 = ((uint64_t)(v_v0 * 11400714785074694791u));
      v_buf_u64 = (((uint64_t)(v_p.ptr[8u])) |
          (((uint64_t)(v_p.ptr[9u])) << 8u) |
          (((uint64_t)(v_p.ptr[10u])) << 16u) |
          (((uint64_t)(v_p.ptr[11u])) << 24u) |
          (((uint64_t)(v_p.ptr[12u])) << 32u) |
          (((uint64_t)(v_p.ptr[13u])) << 40u) |
          (((uint64_t)(v_p.ptr[14u])) << 48u) |
          (((uint64_t)(v_p.ptr[15u])) << 56u));
      v_v1 = ((uint64_t)(v_v1 + ((uint64_t)(v_buf_u64 * 14029467366897019727u))));
      v_v1 = (((uint64_t)(v_v1 << 31u)) | (v_v1 >> 33u));
      v_v1 = ((uint64_t)(v_v1 * 11400714785074694791u));
      v_buf_u64 = (((uint64_t)(v_p.ptr[16u])) |
          (((uint64_t)(v_p.ptr[17u])) << 8u) |
          (((uint64_t)(v_p.ptr[18u])) << 16u) |
          (((uint64_t)(v_p.ptr[19u])) << 24u) |
          (((uint64_t)(v_p.ptr[20u])) << 32u) |
          (((uint64_t)(v_p.ptr[21u])) << 40u) |
          (((uint64_t)(v_p.ptr[22u])) << 48u) |
          (((uint64_t)(v_p.ptr[23u])) << 56u));
      v_v2 = ((uint64_t)(v_v2 + ((uint64_t)(v_buf_u64 * 14029467366897019727u))));
      v_v2 = (((uint64_t)(v_v2 << 31u)) | (v_v2 >> 33u));
      v_v2 = ((uint64_t)(v_v2 * 11400714785074694791u));
      v_buf_u64 = (((uint64_t)(v_p.ptr[24u])) |
          (((uint64_t)(v_p.ptr[25u])) << 8u) |
          (((uint64_t)(v_p.ptr[26u])) << 16u) |
          (((uint64_t)(v_p.ptr[27u])) << 24u) |
          (((uint64_t)(v_p.ptr[28u])) << 32u) |
          (((uint64_t)(v_p.ptr[29u])) << 40u) |
          (((uint64_t)(v_p.ptr[30u])) << 48u) |
          (((uint64_t)(v_p.ptr[31u])) << 56u));
      v_v3 = ((uint64_t)(v_v3 + ((uint64_t)(v_buf_u64 * 14029467366897019727u))));
      v_v3 = (((uint64_t)(v_v3 << 31u)) | (v_v3 >> 33u));
      v_v3 = ((uint64_t)(v_v3 * 11400714785074694791u));
      v_p.ptr += 32;
    }
    v_p.len = 1;
    const uint8_t* i_end1_p = wuffs_private_impl__ptr_u8_plus_len(i_slice_p.ptr, i_slice_p.len);
    while (v_p.ptr < i_end1_p) {
      self->private_impl.f_buf_data[v_buf_len] = v_p.ptr[0u];
      v_buf_len = ((v_buf_len + 1u) & 31u);
      v_p.ptr += 1;
    }
    v_p.len = 0;
  }
  self->private_impl.f_buf_len = v_buf_len;
  self->private_impl.f_v0 = v_v0;
  self->private_impl.f_v1 = v_v1;
  self->private_impl.f_v2 = v_v2;
  self->private_impl.f_v3 = v_v3;
  return wuffs_base__make_empty_struct();
}

// -------- func xxhash64.hasher.checksum_u64

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xxhash64__hasher__checksum_u64(
    const wuffs_xxhash64__hasher* self) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  uint64_t v_ret = 0;
  uint64_t v_v0 = 0;
  uint64_t v_v1 = 0;
  uint64_t v_v2 = 0;
  uint64_t v_v3 = 0;
  uint32_t v_i = 0;
  uint32_t v_i8 = 0;
  uint32_t v_n = 0;
  uint32_t v_buf_u32 = 0;
  uint64_t v_buf_u64 = 0;

  if ((self->private_impl.f_length_modulo_u64 >= 32u) || self->private_impl.f_length_overflows_u64) {
    v_ret += (((uint64_t)(self->private_impl.f_v0 << 1u)) | (self->private_impl.f_v0 >> 63u));
    v_ret += (((uint64_t)(self->private_impl.f_v1 << 7u)) | (self->private_impl.f_v1 >> 57u));
    v_ret += (((uint64_t)(self->private_impl.f_v2 << 12u)) | (self->private_impl.f_v2 >> 52u));
    v_ret += (((uint64_t)(self->private_impl.f_v3 << 18u)) | (self->private_impl.f_v3 >> 46u));
    v_v0 = ((uint64_t)(self->private_impl.f_v0 * 14029467366897019727u));
    v_v0 = (((uint64_t)(v_v0 << 31u)) | (v_v0 >> 33u));
    v_v0 *= 11400714785074694791u;
    v_v1 = ((uint64_t)(self->private_impl.f_v1 * 14029467366897019727u));
    v_v1 = (((uint64_t)(v_v1 << 31u)) | (v_v1 >> 33u));
    v_v1 *= 11400714785074694791u;
    v_v2 = ((uint64_t)(self->private_impl.f_v2 * 14029467366897019727u));
    v_v2 = (((uint64_t)(v_v2 << 31u)) | (v_v2 >> 33u));
    v_v2 *= 11400714785074694791u;
    v_v3 = ((uint64_t)(self->private_impl.f_v3 * 14029467366897019727u));
    v_v3 = (((uint64_t)(v_v3 << 31u)) | (v_v3 >> 33u));
    v_v3 *= 11400714785074694791u;
    v_ret = ((uint64_t)(((uint64_t)((v_ret ^ v_v0) * 11400714785074694791u)) + 9650029242287828579u));
    v_ret = ((uint64_t)(((uint64_t)((v_ret ^ v_v1) * 11400714785074694791u)) + 9650029242287828579u));
    v_ret = ((uint64_t)(((uint64_t)((v_ret ^ v_v2) * 11400714785074694791u)) + 9650029242287828579u));
    v_ret = ((uint64_t)(((uint64_t)((v_ret ^ v_v3) * 11400714785074694791u)) + 9650029242287828579u));
    v_ret += self->private_impl.f_length_modulo_u64;
  } else {
    v_ret += 2870177450012600261u;
    v_ret += self->private_impl.f_length_modulo_u64;
  }
  v_n = 32u;
  v_n = wuffs_base__u32__min(v_n, self->private_impl.f_buf_len);
  if (8u <= v_n) {
    v_buf_u64 = (((uint64_t)(self->private_impl.f_buf_data[0u])) |
        (((uint64_t)(self->private_impl.f_buf_data[1u])) << 8u) |
        (((uint64_t)(self->private_impl.f_buf_data[2u])) << 16u) |
        (((uint64_t)(self->private_impl.f_buf_data[3u])) << 24u) |
        (((uint64_t)(self->private_impl.f_buf_data[4u])) << 32u) |
        (((uint64_t)(self->private_impl.f_buf_data[5u])) << 40u) |
        (((uint64_t)(self->private_impl.f_buf_data[6u])) << 48u) |
        (((uint64_t)(self->private_impl.f_buf_data[7u])) << 56u));
    v_buf_u64 *= 14029467366897019727u;
    v_buf_u64 = (((uint64_t)(v_buf_u64 << 31u)) | (v_buf_u64 >> 33u));
    v_buf_u64 *= 11400714785074694791u;
    v_ret ^= v_buf_u64;
    v_ret = (((uint64_t)(v_ret << 27u)) | (v_ret >> 37u));
    v_ret *= 11400714785074694791u;
    v_ret += 9650029242287828579u;
    v_i = 8u;
  }
  if (16u <= v_n) {
    v_buf_u64 = (((uint64_t)(self->private_impl.f_buf_data[8u])) |
        (((uint64_t)(self->private_impl.f_buf_data[9u])) << 8u) |
        (((uint64_t)(self->private_impl.f_buf_data[10u])) << 16u) |
        (((uint64_t)(self->private_impl.f_buf_data[11u])) << 24u) |
        (((uint64_t)(self->private_impl.f_buf_data[12u])) << 32u) |
        (((uint64_t)(self->private_impl.f_buf_data[13u])) << 40u) |
        (((uint64_t)(self->private_impl.f_buf_data[14u])) << 48u) |
        (((uint64_t)(self->private_impl.f_buf_data[15u])) << 56u));
    v_buf_u64 *= 14029467366897019727u;
    v_buf_u64 = (((uint64_t)(v_buf_u64 << 31u)) | (v_buf_u64 >> 33u));
    v_buf_u64 *= 11400714785074694791u;
    v_ret ^= v_buf_u64;
    v_ret = (((uint64_t)(v_ret << 27u)) | (v_ret >> 37u));
    v_ret *= 11400714785074694791u;
    v_ret += 9650029242287828579u;
    v_i = 16u;
  }
  if (24u <= v_n) {
    v_buf_u64 = (((uint64_t)(self->private_impl.f_buf_data[16u])) |
        (((uint64_t)(self->private_impl.f_buf_data[17u])) << 8u) |
        (((uint64_t)(self->private_impl.f_buf_data[18u])) << 16u) |
        (((uint64_t)(self->private_impl.f_buf_data[19u])) << 24u) |
        (((uint64_t)(self->private_impl.f_buf_data[20u])) << 32u) |
        (((uint64_t)(self->private_impl.f_buf_data[21u])) << 40u) |
        (((uint64_t)(self->private_impl.f_buf_data[22u])) << 48u) |
        (((uint64_t)(self->private_impl.f_buf_data[23u])) << 56u));
    v_buf_u64 *= 14029467366897019727u;
    v_buf_u64 = (((uint64_t)(v_buf_u64 << 31u)) | (v_buf_u64 >> 33u));
    v_buf_u64 *= 11400714785074694791u;
    v_ret ^= v_buf_u64;
    v_ret = (((uint64_t)(v_ret << 27u)) | (v_ret >> 37u));
    v_ret *= 11400714785074694791u;
    v_ret += 9650029242287828579u;
    v_i = 24u;
  }
  if ((v_n & 4u) != 0u) {
    v_i8 = (v_i & 24u);
    v_buf_u32 = (((uint32_t)(self->private_impl.f_buf_data[(v_i8 + 0u)])) |
        (((uint32_t)(self->private_impl.f_buf_data[(v_i8 + 1u)])) << 8u) |
        (((uint32_t)(self->private_impl.f_buf_data[(v_i8 + 2u)])) << 16u) |
        (((uint32_t)(self->private_impl.f_buf_data[(v_i8 + 3u)])) << 24u));
    v_ret ^= ((uint64_t)(((uint64_t)(v_buf_u32)) * 11400714785074694791u));
    v_ret = (((uint64_t)(v_ret << 23u)) | (v_ret >> 41u));
    v_ret *= 14029467366897019727u;
    v_ret += 1609587929392839161u;
    v_i = (v_i8 + 4u);
  }
  while (v_i < v_n) {
    v_ret ^= ((uint64_t)(((uint64_t)(self->private_impl.f_buf_data[v_i])) * 2870177450012600261u));
    v_ret = (((uint64_t)(v_ret << 11u)) | (v_ret >> 53u));
    v_ret *= 11400714785074694791u;
    v_i += 1u;
  }
  v_ret ^= (v_ret >> 33u);
  v_ret *= 14029467366897019727u;
  v_ret ^= (v_ret >> 29u);
  v_ret *= 1609587929392839161u;
  v_ret ^= (v_ret >> 32u);
  return ((uint64_t)(v_ret));
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XXHASH64)

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XZ)

// ---------------- Status Codes Implementations

const char wuffs_xz__error__bad_bcj_offset[] = "#xz: bad BCJ offset";
const char wuffs_xz__error__bad_block_header[] = "#xz: bad block header";
const char wuffs_xz__error__bad_checksum[] = "#xz: bad checksum";
const char wuffs_xz__error__bad_filter[] = "#xz: bad filter";
const char wuffs_xz__error__bad_footer[] = "#xz: bad footer";
const char wuffs_xz__error__bad_header[] = "#xz: bad header";
const char wuffs_xz__error__bad_header_concatenated_stream[] = "#xz: bad header (concatenated stream)";
const char wuffs_xz__error__bad_index[] = "#xz: bad index";
const char wuffs_xz__error__bad_padding[] = "#xz: bad padding";
const char wuffs_xz__error__truncated_input[] = "#xz: truncated input";
const char wuffs_xz__error__unsupported_checksum_algorithm[] = "#xz: unsupported checksum algorithm";
const char wuffs_xz__error__unsupported_filter[] = "#xz: unsupported filter";
const char wuffs_xz__error__unsupported_filter_combination[] = "#xz: unsupported filter combination";
const char wuffs_xz__error__internal_error_inconsistent_bcj_filter_state[] = "#xz: internal error: inconsistent BCJ filter state";

// ---------------- Private Consts

static const bool
WUFFS_XZ__FILTER_04_X86_MASK_TO_ALLOWED_STATUS[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  1u, 1u, 1u, 0u, 1u, 0u, 0u, 0u,
};

static const uint8_t
WUFFS_XZ__FILTER_04_X86_MASK_TO_BIT_NUM[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 1u, 2u, 2u, 3u, 3u, 3u, 3u,
};

static const uint32_t
WUFFS_XZ__FILTER_04_X86_MASK_TO_XOR_OPERAND[8] WUFFS_BASE__POTENTIALLY_UNUSED = {
  4294967295u, 16777215u, 65535u, 65535u, 255u, 255u, 255u, 255u,
};

static const uint8_t
WUFFS_XZ__FILTER_06_IA64_BRANCH_TABLE[32] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
  4u, 4u, 6u, 6u, 0u, 0u, 7u, 7u,
  4u, 4u, 0u, 0u, 4u, 4u, 0u, 0u,
};

#define WUFFS_XZ__QUIRKS_BASE 1963655168u

static const uint8_t
WUFFS_XZ__CHECKSUM_LENGTH[4] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 4u, 8u, 32u,
};

static const uint8_t
WUFFS_XZ__ZEROES[3] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 0u,
};

static const uint8_t
WUFFS_XZ__BCJ_OFFSET_ALIGNMENT[12] WUFFS_BASE__POTENTIALLY_UNUSED = {
  0u, 0u, 0u, 0u, 1u, 4u, 16u, 4u,
  2u, 4u, 4u, 2u,
};

// ---------------- Private Initializer Prototypes

// ---------------- Private Function Prototypes

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_non_final_filters(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_non_final_filters__choosy_default(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_04_x86(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_05_powerpc(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_06_ia64(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_07_arm(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_08_armthumb(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_09_sparc(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_0a_arm64(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_0b_riscv(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__do_transform_io(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__decode_block_header_with_padding(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__decode_block_header_sans_padding(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__verify_index(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_src);

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__verify_footer(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_src);

// ---------------- VTables

const wuffs_base__io_transformer__func_ptrs
wuffs_xz__decoder__func_ptrs_for__wuffs_base__io_transformer = {
  (wuffs_base__optional_u63(*)(const void*))(&wuffs_xz__decoder__dst_history_retain_length),
  (uint64_t(*)(const void*,
      uint32_t))(&wuffs_xz__decoder__get_quirk),
  (wuffs_base__status(*)(void*,
      uint32_t,
      uint64_t))(&wuffs_xz__decoder__set_quirk),
  (wuffs_base__status(*)(void*,
      wuffs_base__io_buffer*,
      wuffs_base__io_buffer*,
      wuffs_base__slice_u8))(&wuffs_xz__decoder__transform_io),
  (wuffs_base__range_ii_u64(*)(const void*))(&wuffs_xz__decoder__workbuf_len),
};

// ---------------- Initializer Implementations

wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT
wuffs_xz__decoder__initialize(
    wuffs_xz__decoder* self,
    size_t sizeof_star_self,
    uint64_t wuffs_version,
    uint32_t options){
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (sizeof(*self) != sizeof_star_self) {
    return wuffs_base__make_status(wuffs_base__error__bad_sizeof_receiver);
  }
  if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) ||
      (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) {
    return wuffs_base__make_status(wuffs_base__error__bad_wuffs_version);
  }

  if ((options & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) {
    // The whole point of this if-check is to detect an uninitialized *self.
    // We disable the warning on GCC. Clang-5.0 does not have this warning.
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
    if (self->private_impl.magic != 0) {
      return wuffs_base__make_status(wuffs_base__error__initialize_falsely_claimed_already_zeroed);
    }
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
  } else {
    if ((options & WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) {
      memset(self, 0, sizeof(*self));
      options |= WUFFS_INITIALIZE__ALREADY_ZEROED;
    } else {
      memset(&(self->private_impl), 0, sizeof(self->private_impl));
    }
  }

  self->private_impl.choosy_apply_non_final_filters = &wuffs_xz__decoder__apply_non_final_filters__choosy_default;

  {
    wuffs_base__status z = wuffs_crc32__ieee_hasher__initialize(
        &self->private_data.f_crc32, sizeof(self->private_data.f_crc32), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  {
    wuffs_base__status z = wuffs_crc64__ecma_hasher__initialize(
        &self->private_data.f_crc64, sizeof(self->private_data.f_crc64), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  {
    wuffs_base__status z = wuffs_sha256__hasher__initialize(
        &self->private_data.f_sha256, sizeof(self->private_data.f_sha256), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  {
    wuffs_base__status z = wuffs_lzma__decoder__initialize(
        &self->private_data.f_lzma, sizeof(self->private_data.f_lzma), WUFFS_VERSION, options);
    if (z.repr) {
      return z;
    }
  }
  self->private_impl.magic = WUFFS_BASE__MAGIC;
  self->private_impl.vtable_for__wuffs_base__io_transformer.vtable_name =
      wuffs_base__io_transformer__vtable_name;
  self->private_impl.vtable_for__wuffs_base__io_transformer.function_pointers =
      (const void*)(&wuffs_xz__decoder__func_ptrs_for__wuffs_base__io_transformer);
  return wuffs_base__make_status(NULL);
}

wuffs_xz__decoder*
wuffs_xz__decoder__alloc(void) {
  wuffs_xz__decoder* x =
      (wuffs_xz__decoder*)(calloc(1, sizeof(wuffs_xz__decoder)));
  if (!x) {
    return NULL;
  }
  if (wuffs_xz__decoder__initialize(
      x, sizeof(wuffs_xz__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__ALREADY_ZEROED).repr) {
    free(x);
    return NULL;
  }
  return x;
}

size_t
sizeof__wuffs_xz__decoder(void) {
  return sizeof(wuffs_xz__decoder);
}

// ---------------- Function Implementations

// -------- func xz.decoder.apply_non_final_filters

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_non_final_filters(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  return (*self->private_impl.choosy_apply_non_final_filters)(self, a_dst_slice);
}

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_non_final_filters__choosy_default(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  uint32_t v_f = 0;
  uint64_t v_i = 0;
  uint32_t v_filter_id = 0;
  uint32_t v_delta_dist = 0;
  uint32_t v_delta_pos = 0;
  uint8_t v_c8 = 0;

  if (self->private_impl.f_num_non_final_filters <= 0u) {
    return 0u;
  }
  v_f = (self->private_impl.f_num_non_final_filters - 1u);
  while (true) {
    v_filter_id = (self->private_impl.f_filters[v_f] & 127u);
    if (v_filter_id == 3u) {
      v_delta_dist = (((self->private_impl.f_filters[v_f] >> 8u) & 255u) + 1u);
      v_delta_pos = (self->private_impl.f_filters[v_f] >> 24u);
      v_i = 0u;
      while (v_i < ((uint64_t)(a_dst_slice.len))) {
        v_c8 = a_dst_slice.ptr[v_i];
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
        v_c8 += self->private_data.f_filter_data[v_f][(((uint32_t)(v_delta_dist + v_delta_pos)) & 255u)];
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
        self->private_data.f_filter_data[v_f][(v_delta_pos & 255u)] = v_c8;
        v_delta_pos -= 1u;
        a_dst_slice.ptr[v_i] = v_c8;
        v_i += 1u;
      }
      self->private_impl.f_filters[v_f] &= 65535u;
      self->private_impl.f_filters[v_f] |= ((uint32_t)(v_delta_pos << 24u));
    }
    if (v_f <= 0u) {
      break;
    }
    v_f -= 1u;
  }
  return 0u;
}

// -------- func xz.decoder.apply_filter_04_x86

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_04_x86(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  wuffs_base__slice_u8 v_s = {0};
  uint32_t v_p = 0;
  uint64_t v_i = 0;
  uint64_t v_prev_pos = 0;
  uint32_t v_prev_mask = 0;
  uint8_t v_c8 = 0;
  uint32_t v_src = 0;
  uint32_t v_dst = 0;
  uint32_t v_bit_num = 0;

  v_s = a_dst_slice;
  v_p = ((uint32_t)(self->private_impl.f_bcj_pos + 5u));
  v_prev_pos = 18446744073709551615u;
  v_prev_mask = self->private_impl.f_bcj_x86_prev_mask;
  while (((uint64_t)(v_s.len)) >= 5u) {
    if (((uint8_t)(v_s.ptr[0u] & 254u)) != 232u) {
      v_i += 1u;
      v_p += 1u;
      v_s = wuffs_base__slice_u8__subslice_i(v_s, 1u);
      continue;
    }
    v_prev_pos = ((uint64_t)(v_i - v_prev_pos));
    if (v_prev_pos > 3u) {
      v_prev_mask = 0u;
    } else if (v_prev_pos > 0u) {
      v_prev_mask = (((uint32_t)(v_prev_mask << (v_prev_pos - 1u))) & 7u);
      if (v_prev_mask != 0u) {
        v_c8 = v_s.ptr[((uint8_t)(4u - WUFFS_XZ__FILTER_04_X86_MASK_TO_BIT_NUM[(v_prev_mask & 7u)]))];
        if ( ! WUFFS_XZ__FILTER_04_X86_MASK_TO_ALLOWED_STATUS[(v_prev_mask & 7u)] || (v_c8 == 0u) || (v_c8 == 255u)) {
          v_prev_pos = v_i;
          v_prev_mask = (((uint32_t)(v_prev_mask << 1u)) | 1u);
          v_i += 1u;
          v_p += 1u;
          v_s = wuffs_base__slice_u8__subslice_i(v_s, 1u);
          continue;
        }
      }
    }
    v_prev_pos = v_i;
    v_c8 = v_s.ptr[4u];
    if ((v_c8 != 0u) && (v_c8 != 255u)) {
      v_prev_mask = (((uint32_t)(v_prev_mask << 1u)) | 1u);
      v_i += 1u;
      v_p += 1u;
      v_s = wuffs_base__slice_u8__subslice_i(v_s, 1u);
      continue;
    }
    v_src = ((((uint32_t)(v_s.ptr[1u])) << 0u) |
        (((uint32_t)(v_s.ptr[2u])) << 8u) |
        (((uint32_t)(v_s.ptr[3u])) << 16u) |
        (((uint32_t)(v_s.ptr[4u])) << 24u));
    while (true) {
      v_dst = ((uint32_t)(v_src - v_p));
      if (v_prev_mask == 0u) {
        break;
      }
      v_bit_num = ((uint32_t)(WUFFS_XZ__FILTER_04_X86_MASK_TO_BIT_NUM[(v_prev_mask & 7u)]));
      v_c8 = ((uint8_t)((v_dst >> (24u - (v_bit_num * 8u)))));
      if ((v_c8 != 0u) && (v_c8 != 255u)) {
        break;
      }
      v_src = (v_dst ^ WUFFS_XZ__FILTER_04_X86_MASK_TO_XOR_OPERAND[(v_prev_mask & 7u)]);
    }
    v_dst &= 33554431u;
    v_dst |= ((uint32_t)(0u - (v_dst & 16777216u)));
    v_s.ptr[1u] = ((uint8_t)((v_dst >> 0u)));
    v_s.ptr[2u] = ((uint8_t)((v_dst >> 8u)));
    v_s.ptr[3u] = ((uint8_t)((v_dst >> 16u)));
    v_s.ptr[4u] = ((uint8_t)((v_dst >> 24u)));
    v_i += 5u;
    v_p += 5u;
    v_s = wuffs_base__slice_u8__subslice_i(v_s, 5u);
  }
  v_prev_pos = ((uint64_t)(v_i - v_prev_pos));
  if (v_prev_pos > 3u) {
    self->private_impl.f_bcj_x86_prev_mask = 0u;
  } else if (v_prev_pos > 0u) {
    self->private_impl.f_bcj_x86_prev_mask = ((uint32_t)(v_prev_mask << (v_prev_pos - 1u)));
  }
  self->private_impl.f_bcj_pos = ((uint32_t)(v_p - 5u));
  return ((uint8_t)(((uint64_t)(v_s.len))));
}

// -------- func xz.decoder.apply_filter_05_powerpc

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_05_powerpc(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  wuffs_base__slice_u8 v_s = {0};
  uint32_t v_p = 0;
  uint32_t v_x = 0;

  v_s = a_dst_slice;
  v_p = self->private_impl.f_bcj_pos;
  while (((uint64_t)(v_s.len)) >= 4u) {
    v_x = ((((uint32_t)(v_s.ptr[0u])) << 24u) |
        (((uint32_t)(v_s.ptr[1u])) << 16u) |
        (((uint32_t)(v_s.ptr[2u])) << 8u) |
        (((uint32_t)(v_s.ptr[3u])) << 0u));
    if ((v_x & 4227858435u) == 1207959553u) {
      v_x = ((((uint32_t)((v_x & 67108860u) - v_p)) & 67108860u) | 1207959553u);
      v_s.ptr[0u] = ((uint8_t)((v_x >> 24u)));
      v_s.ptr[1u] = ((uint8_t)((v_x >> 16u)));
      v_s.ptr[2u] = ((uint8_t)((v_x >> 8u)));
      v_s.ptr[3u] = ((uint8_t)((v_x >> 0u)));
    }
    v_p += 4u;
    v_s = wuffs_base__slice_u8__subslice_i(v_s, 4u);
  }
  self->private_impl.f_bcj_pos = v_p;
  return ((uint8_t)(((uint64_t)(v_s.len))));
}

// -------- func xz.decoder.apply_filter_06_ia64

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_06_ia64(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  wuffs_base__slice_u8 v_s = {0};
  uint32_t v_p = 0;
  uint32_t v_mask = 0;
  uint32_t v_slot = 0;
  uint32_t v_bit_pos = 0;
  uint32_t v_byte_pos = 0;
  uint32_t v_bit_res = 0;
  uint64_t v_x = 0;
  uint32_t v_j = 0;
  uint64_t v_norm = 0;
  uint32_t v_addr = 0;

  v_s = a_dst_slice;
  v_p = self->private_impl.f_bcj_pos;
  while (((uint64_t)(v_s.len)) >= 16u) {
    v_mask = ((uint32_t)(WUFFS_XZ__FILTER_06_IA64_BRANCH_TABLE[((uint8_t)(v_s.ptr[0u] & 31u))]));
    v_slot = 0u;
    while (true) {
      do {
        if (((v_mask >> v_slot) & 1u) == 0u) {
          break;
        }
        v_bit_pos = ((v_slot * 41u) + 5u);
        v_byte_pos = (v_bit_pos >> 3u);
        v_bit_res = (v_bit_pos & 7u);
        v_x = 0u;
        v_j = 0u;
        while (v_j < 6u) {
          v_x |= (((uint64_t)(v_s.ptr[(v_j + v_byte_pos)])) << (8u * v_j));
          v_j += 1u;
        }
        v_norm = (v_x >> v_bit_res);
        if ((((v_norm >> 37u) & 15u) != 5u) || (((v_norm >> 9u) & 7u) != 0u)) {
          break;
        }
        v_addr = ((uint32_t)(((v_norm >> 13u) & 1048575u)));
        v_addr |= (((uint32_t)(((v_norm >> 36u) & 1u))) << 20u);
        v_addr <<= 4u;
        v_addr -= v_p;
        v_addr >>= 4u;
        v_norm &= 18446743996400148479u;
        v_norm |= (((uint64_t)((v_addr & 1048575u))) << 13u);
        v_norm |= (((uint64_t)((v_addr & 1048576u))) << 16u);
        v_x &= ((((uint64_t)(1u)) << v_bit_res) - 1u);
        v_x |= ((uint64_t)(v_norm << v_bit_res));
        v_j = 0u;
        while (v_j < 6u) {
          v_s.ptr[(v_j + v_byte_pos)] = ((uint8_t)((v_x >> (8u * v_j))));
          v_j += 1u;
        }
      } while (0);
      if (v_slot >= 2u) {
        break;
      }
      v_slot += 1u;
    }
    v_p += 16u;
    v_s = wuffs_base__slice_u8__subslice_i(v_s, 16u);
  }
  self->private_impl.f_bcj_pos = v_p;
  return ((uint8_t)(((uint64_t)(v_s.len))));
}

// -------- func xz.decoder.apply_filter_07_arm

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_07_arm(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  wuffs_base__slice_u8 v_s = {0};
  uint32_t v_p = 0;
  uint32_t v_x = 0;

  v_s = a_dst_slice;
  v_p = ((uint32_t)(self->private_impl.f_bcj_pos + 8u));
  while (((uint64_t)(v_s.len)) >= 4u) {
    if (v_s.ptr[3u] == 235u) {
      v_x = ((((uint32_t)(v_s.ptr[0u])) << 0u) |
          (((uint32_t)(v_s.ptr[1u])) << 8u) |
          (((uint32_t)(v_s.ptr[2u])) << 16u) |
          (((uint32_t)(v_s.ptr[3u])) << 24u));
      v_x = (((uint32_t)(((v_x & 16777215u) << 2u) - v_p)) >> 2u);
      v_s.ptr[0u] = ((uint8_t)((v_x >> 0u)));
      v_s.ptr[1u] = ((uint8_t)((v_x >> 8u)));
      v_s.ptr[2u] = ((uint8_t)((v_x >> 16u)));
    }
    v_p += 4u;
    v_s = wuffs_base__slice_u8__subslice_i(v_s, 4u);
  }
  self->private_impl.f_bcj_pos = ((uint32_t)(v_p - 8u));
  return ((uint8_t)(((uint64_t)(v_s.len))));
}

// -------- func xz.decoder.apply_filter_08_armthumb

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_08_armthumb(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  wuffs_base__slice_u8 v_s = {0};
  uint32_t v_p = 0;
  uint32_t v_x = 0;
  uint32_t v_y = 0;

  v_s = a_dst_slice;
  v_p = ((uint32_t)(self->private_impl.f_bcj_pos + 4u));
  while (((uint64_t)(v_s.len)) >= 4u) {
    v_x = ((((uint32_t)(v_s.ptr[0u])) << 0u) |
        (((uint32_t)(v_s.ptr[1u])) << 8u) |
        (((uint32_t)(v_s.ptr[2u])) << 16u) |
        (((uint32_t)(v_s.ptr[3u])) << 24u));
    if ((v_x & 4160813056u) != 4160811008u) {
      v_p += 2u;
      v_s = wuffs_base__slice_u8__subslice_i(v_s, 2u);
      continue;
    }
    v_y = ((((uint32_t)(((uint8_t)(v_s.ptr[0u] & 255u)))) << 11u) |
        (((uint32_t)(((uint8_t)(v_s.ptr[1u] & 7u)))) << 19u) |
        (((uint32_t)(((uint8_t)(v_s.ptr[2u] & 255u)))) << 0u) |
        (((uint32_t)(((uint8_t)(v_s.ptr[3u] & 7u)))) << 8u));
    v_y = (((uint32_t)(((uint32_t)(v_y << 1u)) - v_p)) >> 1u);
    v_s.ptr[0u] = ((uint8_t)((v_y >> 11u)));
    v_s.ptr[1u] = ((uint8_t)((((v_y >> 19u) & 7u) | 240u)));
    v_s.ptr[2u] = ((uint8_t)((v_y >> 0u)));
    v_s.ptr[3u] = ((uint8_t)((((v_y >> 8u) & 7u) | 248u)));
    v_p += 4u;
    v_s = wuffs_base__slice_u8__subslice_i(v_s, 4u);
  }
  self->private_impl.f_bcj_pos = ((uint32_t)(v_p - 4u));
  return ((uint8_t)(((uint64_t)(v_s.len))));
}

// -------- func xz.decoder.apply_filter_09_sparc

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_09_sparc(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  wuffs_base__slice_u8 v_s = {0};
  uint32_t v_p = 0;
  uint32_t v_x = 0;

  v_s = a_dst_slice;
  v_p = self->private_impl.f_bcj_pos;
  while (((uint64_t)(v_s.len)) >= 4u) {
    v_x = ((((uint32_t)(v_s.ptr[0u])) << 24u) |
        (((uint32_t)(v_s.ptr[1u])) << 16u) |
        (((uint32_t)(v_s.ptr[2u])) << 8u) |
        (((uint32_t)(v_s.ptr[3u])) << 0u));
    if (((v_x >> 22u) == 256u) || ((v_x >> 22u) == 511u)) {
      v_x = (((uint32_t)(((uint32_t)(v_x << 2u)) - v_p)) >> 2u);
      v_x = ((1073741824u - (v_x & 4194304u)) | 1073741824u | (v_x & 4194303u));
      v_s.ptr[0u] = ((uint8_t)((v_x >> 24u)));
      v_s.ptr[1u] = ((uint8_t)((v_x >> 16u)));
      v_s.ptr[2u] = ((uint8_t)((v_x >> 8u)));
      v_s.ptr[3u] = ((uint8_t)((v_x >> 0u)));
    }
    v_p += 4u;
    v_s = wuffs_base__slice_u8__subslice_i(v_s, 4u);
  }
  self->private_impl.f_bcj_pos = v_p;
  return ((uint8_t)(((uint64_t)(v_s.len))));
}

// -------- func xz.decoder.apply_filter_0a_arm64

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_0a_arm64(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  wuffs_base__slice_u8 v_s = {0};
  uint32_t v_p = 0;
  uint32_t v_x = 0;
  uint32_t v_y = 0;

  v_s = a_dst_slice;
  v_p = self->private_impl.f_bcj_pos;
  while (((uint64_t)(v_s.len)) >= 4u) {
    v_x = ((((uint32_t)(v_s.ptr[0u])) << 0u) |
        (((uint32_t)(v_s.ptr[1u])) << 8u) |
        (((uint32_t)(v_s.ptr[2u])) << 16u) |
        (((uint32_t)(v_s.ptr[3u])) << 24u));
    if ((v_x >> 26u) == 37u) {
      v_y = ((uint32_t)(v_x - (v_p >> 2u)));
      v_x = (2483027968u | (v_y & 67108863u));
      v_s.ptr[0u] = ((uint8_t)((v_x >> 0u)));
      v_s.ptr[1u] = ((uint8_t)((v_x >> 8u)));
      v_s.ptr[2u] = ((uint8_t)((v_x >> 16u)));
      v_s.ptr[3u] = ((uint8_t)((v_x >> 24u)));
    } else if ((v_x & 2667577344u) == 2415919104u) {
      v_y = (((v_x >> 29u) & 3u) | ((v_x >> 3u) & 2097148u));
      if ((((uint32_t)(v_y + 131072u)) & 1835008u) == 0u) {
        v_y -= (v_p >> 12u);
        v_x &= 2415919135u;
        v_x |= ((v_y & 3u) << 29u);
        v_x |= ((v_y & 262140u) << 3u);
        v_x |= (((uint32_t)(0u - (v_y & 131072u))) & 14680064u);
        v_s.ptr[0u] = ((uint8_t)((v_x >> 0u)));
        v_s.ptr[1u] = ((uint8_t)((v_x >> 8u)));
        v_s.ptr[2u] = ((uint8_t)((v_x >> 16u)));
        v_s.ptr[3u] = ((uint8_t)((v_x >> 24u)));
      }
    }
    v_p += 4u;
    v_s = wuffs_base__slice_u8__subslice_i(v_s, 4u);
  }
  self->private_impl.f_bcj_pos = v_p;
  return ((uint8_t)(((uint64_t)(v_s.len))));
}

// -------- func xz.decoder.apply_filter_0b_riscv

WUFFS_BASE__GENERATED_C_CODE
static uint8_t
wuffs_xz__decoder__apply_filter_0b_riscv(
    wuffs_xz__decoder* self,
    wuffs_base__slice_u8 a_dst_slice) {
  wuffs_base__slice_u8 v_s = {0};
  uint32_t v_p = 0;
  uint32_t v_x = 0;
  uint32_t v_x27 = 0;
  uint32_t v_y = 0;
  uint32_t v_addr = 0;

  v_s = a_dst_slice;
  v_p = self->private_impl.f_bcj_pos;
  while (((uint64_t)(v_s.len)) >= 8u) {
    if (v_s.ptr[0u] == 239u) {
      if (((uint8_t)(v_s.ptr[1u] & 13u)) != 0u) {
        v_p += 2u;
        v_s = wuffs_base__slice_u8__subslice_i(v_s, 2u);
        continue;
      }
      v_addr = ((((uint32_t)(((uint8_t)(v_s.ptr[1u] & 240u)))) << 13u) | (((uint32_t)(v_s.ptr[2u])) << 9u) | (((uint32_t)(v_s.ptr[3u])) << 1u));
      v_addr -= v_p;
      v_s.ptr[1u] = ((uint8_t)(((uint8_t)(v_s.ptr[1u] & 15u)) | ((uint8_t)(((v_addr >> 8u) & 240u)))));
      v_s.ptr[2u] = ((uint8_t)((((v_addr >> 16u) & 15u) | ((v_addr >> 7u) & 16u) | (((uint32_t)(v_addr << 4u)) & 224u))));
      v_s.ptr[3u] = ((uint8_t)((((v_addr >> 4u) & 127u) | ((v_addr >> 13u) & 128u))));
      v_p += 4u;
      v_s = wuffs_base__slice_u8__subslice_i(v_s, 4u);
      continue;
    } else if (((uint8_t)(v_s.ptr[0u] & 127u)) == 23u) {
      v_x = ((((uint32_t)(v_s.ptr[0u])) << 0u) |
          (((uint32_t)(v_s.ptr[1u])) << 8u) |
          (((uint32_t)(v_s.ptr[2u])) << 16u) |
          (((uint32_t)(v_s.ptr[3u])) << 24u));
      if ((v_x & 3712u) != 0u) {
        v_y = ((((uint32_t)(v_s.ptr[4u])) << 0u) |
            (((uint32_t)(v_s.ptr[5u])) << 8u) |
            (((uint32_t)(v_s.ptr[6u])) << 16u) |
            (((uint32_t)(v_s.ptr[7u])) << 24u));
        if (((((uint32_t)(v_x << 8u)) ^ ((uint32_t)(v_y - 3u))) & 1015811u) != 0u) {
          v_p += 6u;
          v_s = wuffs_base__slice_u8__subslice_i(v_s, 6u);
          continue;
        }
        v_addr = ((v_x & 4294963200u) | (v_y >> 20u));
        v_x = (279u | ((uint32_t)(v_y << 12u)));
        v_s.ptr[0u] = ((uint8_t)((v_x >> 0u)));
        v_s.ptr[1u] = ((uint8_t)((v_x >> 8u)));
        v_s.ptr[2u] = ((uint8_t)((v_x >> 16u)));
        v_s.ptr[3u] = ((uint8_t)((v_x >> 24u)));
        v_s.ptr[4u] = ((uint8_t)((v_addr >> 0u)));
        v_s.ptr[5u] = ((uint8_t)((v_addr >> 8u)));
        v_s.ptr[6u] = ((uint8_t)((v_addr >> 16u)));
        v_s.ptr[7u] = ((uint8_t)((v_addr >> 24u)));
        v_p += 8u;
        v_s = wuffs_base__slice_u8__subslice_i(v_s, 8u);
        continue;
      }
      v_x27 = (v_x >> 27u);
      if (((uint32_t)(((uint32_t)(v_x - 12567u)) << 18u)) >= (v_x27 & 29u)) {
        v_p += 4u;
        v_s = wuffs_base__slice_u8__subslice_i(v_s, 4u);
        continue;
      }
      v_addr = ((((uint32_t)(v_s.ptr[4u])) << 24u) |
          (((uint32_t)(v_s.ptr[5u])) << 16u) |
          (((uint32_t)(v_s.ptr[6u])) << 8u) |
          (((uint32_t)(v_s.ptr[7u])) << 0u));
      v_addr -= v_p;
      v_y = ((v_x >> 12u) | ((uint32_t)(v_addr << 20u)));
      v_x = (23u | (v_x27 << 7u) | (((uint32_t)(v_addr + 2048u)) & 4294963200u));
      v_s.ptr[0u] = ((uint8_t)((v_x >> 0u)));
      v_s.ptr[1u] = ((uint8_t)((v_x >> 8u)));
      v_s.ptr[2u] = ((uint8_t)((v_x >> 16u)));
      v_s.ptr[3u] = ((uint8_t)((v_x >> 24u)));
      v_s.ptr[4u] = ((uint8_t)((v_y >> 0u)));
      v_s.ptr[5u] = ((uint8_t)((v_y >> 8u)));
      v_s.ptr[6u] = ((uint8_t)((v_y >> 16u)));
      v_s.ptr[7u] = ((uint8_t)((v_y >> 24u)));
      v_p += 8u;
      v_s = wuffs_base__slice_u8__subslice_i(v_s, 8u);
      continue;
    }
    v_p += 2u;
    v_s = wuffs_base__slice_u8__subslice_i(v_s, 2u);
  }
  self->private_impl.f_bcj_pos = v_p;
  return ((uint8_t)(((uint64_t)(v_s.len))));
}

// -------- func xz.decoder.get_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC uint64_t
wuffs_xz__decoder__get_quirk(
    const wuffs_xz__decoder* self,
    uint32_t a_key) {
  if (!self) {
    return 0;
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return 0;
  }

  if (a_key == 1u) {
    if (self->private_impl.f_ignore_checksum) {
      return 1u;
    }
  } else if (a_key == 1963655168u) {
    if (self->private_impl.f_standalone_format) {
      return 1u;
    }
  }
  return 0u;
}

// -------- func xz.decoder.set_quirk

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_xz__decoder__set_quirk(
    wuffs_xz__decoder* self,
    uint32_t a_key,
    uint64_t a_value) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }

  if (a_key == 1u) {
    self->private_impl.f_ignore_checksum = (a_value > 0u);
    return wuffs_base__make_status(NULL);
  } else if (a_key == 1963655168u) {
    self->private_impl.f_standalone_format = (a_value > 0u);
    return wuffs_base__make_status(NULL);
  }
  return wuffs_base__make_status(wuffs_base__error__unsupported_option);
}

// -------- func xz.decoder.dst_history_retain_length

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__optional_u63
wuffs_xz__decoder__dst_history_retain_length(
    const wuffs_xz__decoder* self) {
  if (!self) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__make_optional_u63(false, 0u);
  }

  return wuffs_lzma__decoder__dst_history_retain_length(&self->private_data.f_lzma);
}

// -------- func xz.decoder.workbuf_len

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64
wuffs_xz__decoder__workbuf_len(
    const wuffs_xz__decoder* self) {
  if (!self) {
    return wuffs_base__utility__empty_range_ii_u64();
  }
  if ((self->private_impl.magic != WUFFS_BASE__MAGIC) &&
      (self->private_impl.magic != WUFFS_BASE__DISABLED)) {
    return wuffs_base__utility__empty_range_ii_u64();
  }

  return wuffs_lzma__decoder__workbuf_len(&self->private_data.f_lzma);
}

// -------- func xz.decoder.transform_io

WUFFS_BASE__GENERATED_C_CODE
WUFFS_BASE__MAYBE_STATIC wuffs_base__status
wuffs_xz__decoder__transform_io(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  if (!self) {
    return wuffs_base__make_status(wuffs_base__error__bad_receiver);
  }
  if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
    return wuffs_base__make_status(
        (self->private_impl.magic == WUFFS_BASE__DISABLED)
        ? wuffs_base__error__disabled_by_previous_error
        : wuffs_base__error__initialize_not_called);
  }
  if (!a_dst || !a_src) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__bad_argument);
  }
  if ((self->private_impl.active_coroutine != 0) &&
      (self->private_impl.active_coroutine != 1)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
    return wuffs_base__make_status(wuffs_base__error__interleaved_coroutine_calls);
  }
  self->private_impl.active_coroutine = 0;
  wuffs_base__status status = wuffs_base__make_status(NULL);

  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  uint32_t coro_susp_point = self->private_impl.p_transform_io;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        wuffs_base__status t_0 = wuffs_xz__decoder__do_transform_io(self, a_dst, a_src, a_workbuf);
        v_status = t_0;
      }
      if ((v_status.repr == wuffs_base__suspension__short_read) && (a_src && a_src->meta.closed)) {
        status = wuffs_base__make_status(wuffs_xz__error__truncated_input);
        goto exit;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
    }

    ok:
    self->private_impl.p_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_impl.active_coroutine = wuffs_base__status__is_suspension(&status) ? 1 : 0;

  goto exit;
  exit:
  if (wuffs_base__status__is_error(&status)) {
    self->private_impl.magic = WUFFS_BASE__DISABLED;
  }
  return status;
}

// -------- func xz.decoder.do_transform_io

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__do_transform_io(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_dst,
    wuffs_base__io_buffer* a_src,
    wuffs_base__slice_u8 a_workbuf) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint64_t v_header_magic = 0;
  uint64_t v_dmark = 0;
  uint64_t v_smark = 0;
  uint8_t v_i8 = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint32_t v_checksum32_have = 0;
  uint32_t v_checksum32_want = 0;
  uint64_t v_checksum64_have = 0;
  uint64_t v_checksum64_want = 0;
  wuffs_base__bitvec256 v_checksum256_have = {0};
  uint64_t v_compressed_size = 0;
  uint64_t v_uncompressed_size = 0;
  uint32_t v_hash = 0;
  uint8_t v_c8 = 0;
  uint32_t v_c32 = 0;
  uint16_t v_footer_magic = 0;

  uint8_t* iop_a_dst = NULL;
  uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_dst && a_dst->data.ptr) {
    io0_a_dst = a_dst->data.ptr;
    io1_a_dst = io0_a_dst + a_dst->meta.wi;
    iop_a_dst = io1_a_dst;
    io2_a_dst = io0_a_dst + a_dst->data.len;
    if (a_dst->meta.closed) {
      io2_a_dst = iop_a_dst;
    }
  }
  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_do_transform_io;
  if (coro_susp_point) {
    v_checksum32_have = self->private_data.s_do_transform_io.v_checksum32_have;
    v_checksum32_want = self->private_data.s_do_transform_io.v_checksum32_want;
    v_checksum256_have = self->private_data.s_do_transform_io.v_checksum256_have;
    v_compressed_size = self->private_data.s_do_transform_io.v_compressed_size;
    v_uncompressed_size = self->private_data.s_do_transform_io.v_uncompressed_size;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    while (true) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        uint64_t t_0;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 6)) {
          t_0 = ((uint64_t)(wuffs_base__peek_u48le__no_bounds_check(iop_a_src)));
          iop_a_src += 6;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
            if (num_bits_0 == 40) {
              t_0 = ((uint64_t)(*scratch));
              break;
            }
            num_bits_0 += 8u;
            *scratch |= ((uint64_t)(num_bits_0)) << 56;
          }
        }
        v_header_magic = t_0;
      }
      if (v_header_magic != 388031461373u) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_header);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        uint64_t t_1;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 6)) {
          t_1 = ((uint64_t)(wuffs_base__peek_u48le__no_bounds_check(iop_a_src)));
          iop_a_src += 6;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
            if (num_bits_1 == 40) {
              t_1 = ((uint64_t)(*scratch));
              break;
            }
            num_bits_1 += 8u;
            *scratch |= ((uint64_t)(num_bits_1)) << 56;
          }
        }
        v_header_magic = t_1;
      }
      if (v_header_magic == 72400582410240u) {
        self->private_impl.f_checksummer = 0u;
      } else if (v_header_magic == 60327687946496u) {
        self->private_impl.f_checksummer = 1u;
      } else if (v_header_magic == 77742513456128u) {
        self->private_impl.f_checksummer = 2u;
      } else if (v_header_magic == 177077137508864u) {
        self->private_impl.f_checksummer = 3u;
      } else if ((v_header_magic & 61695u) != 0u) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_header);
        goto exit;
      } else {
        v_header_magic = (15u & (v_header_magic >> 8u));
        if ((v_header_magic != 0u) &&
            (v_header_magic != 1u) &&
            (v_header_magic != 4u) &&
            (v_header_magic != 10u)) {
          status = wuffs_base__make_status(wuffs_xz__error__unsupported_checksum_algorithm);
          goto exit;
        }
        status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
        goto exit;
      }
      self->private_impl.f_flags = ((uint16_t)(v_header_magic));
      self->private_impl.f_num_actual_blocks = 0u;
      while (true) {
        if (((uint64_t)(io2_a_src - iop_a_src)) <= 0u) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5);
          continue;
        } else if (wuffs_base__peek_u8be__no_bounds_check(iop_a_src) == 0u) {
          break;
        }
        self->private_impl.f_num_actual_blocks += 1u;
        if ( ! self->private_impl.f_ignore_checksum) {
          wuffs_private_impl__ignore_status(wuffs_crc32__ieee_hasher__initialize(&self->private_data.f_crc32,
              sizeof (wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
        }
        self->private_impl.f_compressed_size_for_index = 4u;
        while (true) {
          v_smark = ((uint64_t)(iop_a_src - io0_a_src));
          {
            if (a_src) {
              a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
            }
            wuffs_base__status t_2 = wuffs_xz__decoder__decode_block_header_with_padding(self, a_src);
            v_status = t_2;
            if (a_src) {
              iop_a_src = a_src->data.ptr + a_src->meta.ri;
            }
          }
          wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_compressed_size_for_index, wuffs_private_impl__io__count_since(v_smark, ((uint64_t)(iop_a_src - io0_a_src))));
          if ( ! self->private_impl.f_ignore_checksum) {
            v_checksum32_have = wuffs_crc32__ieee_hasher__update_u32(&self->private_data.f_crc32, wuffs_private_impl__io__since(v_smark, ((uint64_t)(iop_a_src - io0_a_src)), io0_a_src));
          }
          if (wuffs_base__status__is_ok(&v_status)) {
            break;
          }
          status = v_status;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(6);
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          uint32_t t_3;
          if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
            t_3 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
            iop_a_src += 4;
          } else {
            self->private_data.s_do_transform_io.scratch = 0;
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
            while (true) {
              if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                goto suspend;
              }
              uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
              uint32_t num_bits_3 = ((uint32_t)(*scratch >> 56));
              *scratch <<= 8;
              *scratch >>= 8;
              *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_3;
              if (num_bits_3 == 24) {
                t_3 = ((uint32_t)(*scratch));
                break;
              }
              num_bits_3 += 8u;
              *scratch |= ((uint64_t)(num_bits_3)) << 56;
            }
          }
          v_checksum32_want = t_3;
        }
        if (self->private_impl.f_ignore_checksum) {
        } else if (v_checksum32_have != v_checksum32_want) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
          goto exit;
        } else {
          wuffs_private_impl__ignore_status(wuffs_crc32__ieee_hasher__initialize(&self->private_data.f_crc32,
              sizeof (wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
          wuffs_private_impl__ignore_status(wuffs_crc64__ecma_hasher__initialize(&self->private_data.f_crc64,
              sizeof (wuffs_crc64__ecma_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
          wuffs_private_impl__ignore_status(wuffs_sha256__hasher__initialize(&self->private_data.f_sha256,
              sizeof (wuffs_sha256__hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
        }
        v_compressed_size = 0u;
        v_uncompressed_size = 0u;
        while (true) {
          if (((uint64_t)(self->private_impl.f_bcj_undo_index)) > ((uint64_t)(io2_a_dst - iop_a_dst))) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_write);
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(9);
            continue;
          }
          v_dmark = ((uint64_t)(iop_a_dst - io0_a_dst));
          v_smark = ((uint64_t)(iop_a_src - io0_a_src));
          if (self->private_impl.f_num_non_final_filters == 0u) {
            {
              if (a_dst) {
                a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
              }
              if (a_src) {
                a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
              }
              wuffs_base__status t_4 = wuffs_lzma__decoder__transform_io(&self->private_data.f_lzma, a_dst, a_src, a_workbuf);
              v_status = t_4;
              if (a_dst) {
                iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
              }
              if (a_src) {
                iop_a_src = a_src->data.ptr + a_src->meta.ri;
              }
            }
          } else {
            if (self->private_impl.f_bcj_undo_index > 0u) {
              wuffs_private_impl__io_writer__copy_from_slice(&iop_a_dst, io2_a_dst,wuffs_base__make_slice_u8(self->private_data.f_filter_data[0u], self->private_impl.f_bcj_undo_index));
              self->private_impl.f_bcj_undo_index = 0u;
            }
            {
              uint8_t* o_0_io0_a_dst = io0_a_dst;
              uint8_t* o_0_io1_a_dst = io1_a_dst;
              io0_a_dst = iop_a_dst;
              io1_a_dst = iop_a_dst;
              wuffs_base__io_buffer o_0_a_dst;
              if (a_dst) {
                memcpy(&o_0_a_dst, a_dst, sizeof(*a_dst));
                size_t wi0 = a_dst->meta.wi;
                a_dst->data.ptr += wi0;
                a_dst->data.len -= wi0;
                a_dst->meta.ri = 0;
                a_dst->meta.wi = 0;
                a_dst->meta.pos = wuffs_base__u64__sat_add(a_dst->meta.pos, wi0);
              }
              {
                if (a_dst) {
                  a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
                }
                if (a_src) {
                  a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
                }
                wuffs_base__status t_5 = wuffs_lzma__decoder__transform_io(&self->private_data.f_lzma, a_dst, a_src, a_workbuf);
                v_status = t_5;
                if (a_dst) {
                  iop_a_dst = a_dst->data.ptr + a_dst->meta.wi;
                }
                if (a_src) {
                  iop_a_src = a_src->data.ptr + a_src->meta.ri;
                }
              }
              if (a_dst) {
                memcpy(a_dst, &o_0_a_dst, sizeof(*a_dst));
                a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
                io0_a_dst = o_0_io0_a_dst;
                io1_a_dst = o_0_io1_a_dst;
              }
            }
            self->private_impl.f_bcj_undo_index = wuffs_xz__decoder__apply_non_final_filters(self, wuffs_private_impl__io__since(v_dmark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst));
            if ((self->private_impl.f_bcj_undo_index > 0u) &&  ! wuffs_base__status__is_ok(&v_status)) {
              v_i8 = ((uint8_t)(self->private_impl.f_bcj_undo_index - 1u));
              while (true) {
                if ( ! (iop_a_dst > io1_a_dst)) {
                  status = wuffs_base__make_status(wuffs_xz__error__internal_error_inconsistent_bcj_filter_state);
                  goto exit;
                }
                self->private_data.f_filter_data[0u][v_i8] = iop_a_dst[-1];
                iop_a_dst--;
                if (v_i8 <= 0u) {
                  break;
                }
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
                v_i8 -= 1u;
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
              }
            }
          }
          v_compressed_size += wuffs_private_impl__io__count_since(v_smark, ((uint64_t)(iop_a_src - io0_a_src)));
          v_uncompressed_size += wuffs_private_impl__io__count_since(v_dmark, ((uint64_t)(iop_a_dst - io0_a_dst)));
          if (self->private_impl.f_ignore_checksum) {
          } else if (self->private_impl.f_checksummer == 1u) {
            wuffs_crc32__ieee_hasher__update(&self->private_data.f_crc32, wuffs_private_impl__io__since(v_dmark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst));
          } else if (self->private_impl.f_checksummer == 2u) {
            wuffs_crc64__ecma_hasher__update(&self->private_data.f_crc64, wuffs_private_impl__io__since(v_dmark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst));
          } else if (self->private_impl.f_checksummer == 3u) {
            wuffs_sha256__hasher__update(&self->private_data.f_sha256, wuffs_private_impl__io__since(v_dmark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst));
          }
          if (wuffs_base__status__is_ok(&v_status)) {
            break;
          }
          status = v_status;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10);
        }
        if ((self->private_impl.f_block_has_compressed_size && (self->private_impl.f_block_compressed_size != v_compressed_size)) || (self->private_impl.f_block_has_uncompressed_size && (self->private_impl.f_block_uncompressed_size != v_uncompressed_size))) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_block_header);
          goto exit;
        }
        wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_compressed_size_for_index, v_compressed_size);
        wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_compressed_size_for_index, ((uint64_t)(WUFFS_XZ__CHECKSUM_LENGTH[self->private_impl.f_checksummer])));
        self->private_impl.f_verification_have_total_sizes[0u] += self->private_impl.f_compressed_size_for_index;
        v_hash = ((uint32_t)((self->private_impl.f_compressed_size_for_index ^ (self->private_impl.f_compressed_size_for_index >> 32u))));
        v_hash *= 3432918353u;
        v_hash = (((uint32_t)(v_hash << 15u)) | (v_hash >> 17u));
        v_hash *= 461845907u;
        v_hash ^= self->private_impl.f_verification_have_hashed_sizes[0u];
        v_hash = (((uint32_t)(v_hash << 13u)) | (v_hash >> 19u));
        self->private_impl.f_verification_have_hashed_sizes[0u] = ((uint32_t)(((uint32_t)(v_hash * 5u)) + 3864292196u));
        self->private_impl.f_verification_have_total_sizes[1u] += v_uncompressed_size;
        v_hash = ((uint32_t)((v_uncompressed_size ^ (v_uncompressed_size >> 32u))));
        v_hash *= 3432918353u;
        v_hash = (((uint32_t)(v_hash << 15u)) | (v_hash >> 17u));
        v_hash *= 461845907u;
        v_hash ^= self->private_impl.f_verification_have_hashed_sizes[1u];
        v_hash = (((uint32_t)(v_hash << 13u)) | (v_hash >> 19u));
        self->private_impl.f_verification_have_hashed_sizes[1u] = ((uint32_t)(((uint32_t)(v_hash * 5u)) + 3864292196u));
        while ((v_compressed_size & 3u) != 0u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint8_t t_6 = *iop_a_src++;
            v_c8 = t_6;
          }
          if (v_c8 != 0u) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_padding);
            goto exit;
          }
          v_compressed_size += 1u;
        }
        self->private_impl.f_lzma_needs_reset = true;
        if (self->private_impl.f_ignore_checksum) {
          self->private_data.s_do_transform_io.scratch = ((uint32_t)(WUFFS_XZ__CHECKSUM_LENGTH[self->private_impl.f_checksummer]));
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
          if (self->private_data.s_do_transform_io.scratch > ((uint64_t)(io2_a_src - iop_a_src))) {
            self->private_data.s_do_transform_io.scratch -= ((uint64_t)(io2_a_src - iop_a_src));
            iop_a_src = io2_a_src;
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          iop_a_src += self->private_data.s_do_transform_io.scratch;
        } else if (self->private_impl.f_checksummer == 1u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13);
            uint32_t t_7;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_7 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_do_transform_io.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
                uint32_t num_bits_7 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_7;
                if (num_bits_7 == 24) {
                  t_7 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_7 += 8u;
                *scratch |= ((uint64_t)(num_bits_7)) << 56;
              }
            }
            v_checksum32_want = t_7;
          }
          v_checksum32_have = wuffs_crc32__ieee_hasher__checksum_u32(&self->private_data.f_crc32);
          if (v_checksum32_have != v_checksum32_want) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
            goto exit;
          }
        } else if (self->private_impl.f_checksummer == 2u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15);
            uint64_t t_8;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
              t_8 = wuffs_base__peek_u64le__no_bounds_check(iop_a_src);
              iop_a_src += 8;
            } else {
              self->private_data.s_do_transform_io.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
                uint32_t num_bits_8 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_8;
                if (num_bits_8 == 56) {
                  t_8 = ((uint64_t)(*scratch));
                  break;
                }
                num_bits_8 += 8u;
                *scratch |= ((uint64_t)(num_bits_8)) << 56;
              }
            }
            v_checksum64_want = t_8;
          }
          v_checksum64_have = wuffs_crc64__ecma_hasher__checksum_u64(&self->private_data.f_crc64);
          if (v_checksum64_have != v_checksum64_want) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
            goto exit;
          }
        } else if (self->private_impl.f_checksummer == 3u) {
          v_checksum256_have = wuffs_sha256__hasher__checksum_bitvec256(&self->private_data.f_sha256);
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(17);
            uint64_t t_9;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
              t_9 = wuffs_base__peek_u64be__no_bounds_check(iop_a_src);
              iop_a_src += 8;
            } else {
              self->private_data.s_do_transform_io.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(18);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
                uint32_t num_bits_9 = ((uint32_t)(*scratch & 0xFFu));
                *scratch >>= 8;
                *scratch <<= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_9);
                if (num_bits_9 == 56) {
                  t_9 = ((uint64_t)(*scratch >> 0));
                  break;
                }
                num_bits_9 += 8u;
                *scratch |= ((uint64_t)(num_bits_9));
              }
            }
            v_checksum64_want = t_9;
          }
          if (wuffs_base__bitvec256__get_u64(&v_checksum256_have, 3u) != v_checksum64_want) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
            goto exit;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(19);
            uint64_t t_10;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
              t_10 = wuffs_base__peek_u64be__no_bounds_check(iop_a_src);
              iop_a_src += 8;
            } else {
              self->private_data.s_do_transform_io.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(20);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
                uint32_t num_bits_10 = ((uint32_t)(*scratch & 0xFFu));
                *scratch >>= 8;
                *scratch <<= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_10);
                if (num_bits_10 == 56) {
                  t_10 = ((uint64_t)(*scratch >> 0));
                  break;
                }
                num_bits_10 += 8u;
                *scratch |= ((uint64_t)(num_bits_10));
              }
            }
            v_checksum64_want = t_10;
          }
          if (wuffs_base__bitvec256__get_u64(&v_checksum256_have, 2u) != v_checksum64_want) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
            goto exit;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(21);
            uint64_t t_11;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
              t_11 = wuffs_base__peek_u64be__no_bounds_check(iop_a_src);
              iop_a_src += 8;
            } else {
              self->private_data.s_do_transform_io.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(22);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
                uint32_t num_bits_11 = ((uint32_t)(*scratch & 0xFFu));
                *scratch >>= 8;
                *scratch <<= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_11);
                if (num_bits_11 == 56) {
                  t_11 = ((uint64_t)(*scratch >> 0));
                  break;
                }
                num_bits_11 += 8u;
                *scratch |= ((uint64_t)(num_bits_11));
              }
            }
            v_checksum64_want = t_11;
          }
          if (wuffs_base__bitvec256__get_u64(&v_checksum256_have, 1u) != v_checksum64_want) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
            goto exit;
          }
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(23);
            uint64_t t_12;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 8)) {
              t_12 = wuffs_base__peek_u64be__no_bounds_check(iop_a_src);
              iop_a_src += 8;
            } else {
              self->private_data.s_do_transform_io.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(24);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
                uint32_t num_bits_12 = ((uint32_t)(*scratch & 0xFFu));
                *scratch >>= 8;
                *scratch <<= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_12);
                if (num_bits_12 == 56) {
                  t_12 = ((uint64_t)(*scratch >> 0));
                  break;
                }
                num_bits_12 += 8u;
                *scratch |= ((uint64_t)(num_bits_12));
              }
            }
            v_checksum64_want = t_12;
          }
          if (wuffs_base__bitvec256__get_u64(&v_checksum256_have, 0u) != v_checksum64_want) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
            goto exit;
          }
        }
      }
      self->private_impl.f_backwards_size = 0u;
      if ( ! self->private_impl.f_ignore_checksum) {
        wuffs_private_impl__ignore_status(wuffs_crc32__ieee_hasher__initialize(&self->private_data.f_crc32,
            sizeof (wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
      }
      while (true) {
        v_smark = ((uint64_t)(iop_a_src - io0_a_src));
        {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          wuffs_base__status t_13 = wuffs_xz__decoder__verify_index(self, a_src);
          v_status = t_13;
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        wuffs_private_impl__u64__sat_add_indirect(&self->private_impl.f_backwards_size, wuffs_private_impl__io__count_since(v_smark, ((uint64_t)(iop_a_src - io0_a_src))));
        if ( ! self->private_impl.f_ignore_checksum) {
          wuffs_crc32__ieee_hasher__update(&self->private_data.f_crc32, wuffs_private_impl__io__since(v_smark, ((uint64_t)(iop_a_src - io0_a_src)), io0_a_src));
        }
        if (wuffs_base__status__is_ok(&v_status)) {
          break;
        }
        status = v_status;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(25);
      }
      if ( ! self->private_impl.f_ignore_checksum) {
        wuffs_crc32__ieee_hasher__update(&self->private_data.f_crc32, wuffs_base__make_slice_u8(wuffs_base__strip_const_from_u8_ptr(WUFFS_XZ__ZEROES), (3u & ((uint64_t)(0u - (3u & self->private_impl.f_backwards_size))))));
      }
      while ((self->private_impl.f_backwards_size & 3u) != 0u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(26);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_14 = *iop_a_src++;
          v_c8 = t_14;
        }
        if (v_c8 != 0u) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_index);
          goto exit;
        }
        self->private_impl.f_backwards_size += 1u;
      }
      self->private_impl.f_backwards_size >>= 2u;
      if ((self->private_impl.f_backwards_size == 0u) || (self->private_impl.f_backwards_size > 4294967295u)) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_index);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(27);
        uint32_t t_15;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_15 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(28);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_15 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_15;
            if (num_bits_15 == 24) {
              t_15 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_15 += 8u;
            *scratch |= ((uint64_t)(num_bits_15)) << 56;
          }
        }
        v_checksum32_want = t_15;
      }
      if (self->private_impl.f_ignore_checksum) {
      } else if (v_checksum32_want != wuffs_crc32__ieee_hasher__checksum_u32(&self->private_data.f_crc32)) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
        goto exit;
      } else {
        wuffs_private_impl__ignore_status(wuffs_crc32__ieee_hasher__initialize(&self->private_data.f_crc32,
            sizeof (wuffs_crc32__ieee_hasher), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(29);
        uint32_t t_16;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
          t_16 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
          iop_a_src += 4;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(30);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_16 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_16;
            if (num_bits_16 == 24) {
              t_16 = ((uint32_t)(*scratch));
              break;
            }
            num_bits_16 += 8u;
            *scratch |= ((uint64_t)(num_bits_16)) << 56;
          }
        }
        v_checksum32_want = t_16;
      }
      while (true) {
        v_smark = ((uint64_t)(iop_a_src - io0_a_src));
        {
          if (a_src) {
            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
          }
          wuffs_base__status t_17 = wuffs_xz__decoder__verify_footer(self, a_src);
          v_status = t_17;
          if (a_src) {
            iop_a_src = a_src->data.ptr + a_src->meta.ri;
          }
        }
        if ( ! self->private_impl.f_ignore_checksum) {
          wuffs_crc32__ieee_hasher__update(&self->private_data.f_crc32, wuffs_private_impl__io__since(v_smark, ((uint64_t)(iop_a_src - io0_a_src)), io0_a_src));
        }
        if (wuffs_base__status__is_ok(&v_status)) {
          break;
        }
        status = v_status;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(31);
      }
      if ( ! self->private_impl.f_ignore_checksum && (v_checksum32_want != wuffs_crc32__ieee_hasher__checksum_u32(&self->private_data.f_crc32))) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_checksum);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(32);
        uint16_t t_18;
        if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
          t_18 = wuffs_base__peek_u16le__no_bounds_check(iop_a_src);
          iop_a_src += 2;
        } else {
          self->private_data.s_do_transform_io.scratch = 0;
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(33);
          while (true) {
            if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
              status = wuffs_base__make_status(wuffs_base__suspension__short_read);
              goto suspend;
            }
            uint64_t* scratch = &self->private_data.s_do_transform_io.scratch;
            uint32_t num_bits_18 = ((uint32_t)(*scratch >> 56));
            *scratch <<= 8;
            *scratch >>= 8;
            *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_18;
            if (num_bits_18 == 8) {
              t_18 = ((uint16_t)(*scratch));
              break;
            }
            num_bits_18 += 8u;
            *scratch |= ((uint64_t)(num_bits_18)) << 56;
          }
        }
        v_footer_magic = t_18;
      }
      if (v_footer_magic != 23129u) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_footer);
        goto exit;
      }
      if ( ! self->private_impl.f_standalone_format) {
        break;
      }
      while (true) {
        while (((uint64_t)(io2_a_src - iop_a_src)) < 4u) {
          if (a_src && a_src->meta.closed) {
            if (((uint64_t)(io2_a_src - iop_a_src)) == 0u) {
              goto label__streams__break;
            } else {
              status = wuffs_base__make_status(wuffs_xz__error__truncated_input);
              goto exit;
            }
          }
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(34);
        }
        v_c32 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        if (v_c32 == 1484404733u) {
          break;
        } else if (v_c32 != 0u) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_header_concatenated_stream);
          goto exit;
        }
        iop_a_src += 4u;
      }
      self->private_impl.f_started_verify_index = false;
    }
    label__streams__break:;

    ok:
    self->private_impl.p_do_transform_io = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_do_transform_io = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_do_transform_io.v_checksum32_have = v_checksum32_have;
  self->private_data.s_do_transform_io.v_checksum32_want = v_checksum32_want;
  self->private_data.s_do_transform_io.v_checksum256_have = v_checksum256_have;
  self->private_data.s_do_transform_io.v_compressed_size = v_compressed_size;
  self->private_data.s_do_transform_io.v_uncompressed_size = v_uncompressed_size;

  goto exit;
  exit:
  if (a_dst && a_dst->data.ptr) {
    a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr));
  }
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func xz.decoder.decode_block_header_with_padding

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__decode_block_header_with_padding(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint64_t v_padded_size_have = 0;
  uint64_t v_padded_size_want = 0;
  uint64_t v_smark = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_block_header_with_padding;
  if (coro_susp_point) {
    v_padded_size_have = self->private_data.s_decode_block_header_with_padding.v_padded_size_have;
    v_padded_size_want = self->private_data.s_decode_block_header_with_padding.v_padded_size_want;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_c8 = t_0;
    }
    v_padded_size_want = ((uint64_t)((((uint64_t)(v_c8)) * 4u) - 1u));
    while (true) {
      v_smark = ((uint64_t)(iop_a_src - io0_a_src));
      {
        if (a_src) {
          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
        }
        wuffs_base__status t_1 = wuffs_xz__decoder__decode_block_header_sans_padding(self, a_src);
        v_status = t_1;
        if (a_src) {
          iop_a_src = a_src->data.ptr + a_src->meta.ri;
        }
      }
      wuffs_private_impl__u64__sat_add_indirect(&v_padded_size_have, wuffs_private_impl__io__count_since(v_smark, ((uint64_t)(iop_a_src - io0_a_src))));
      if (wuffs_base__status__is_ok(&v_status)) {
        break;
      }
      status = v_status;
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2);
    }
    if (v_padded_size_have > v_padded_size_want) {
      status = wuffs_base__make_status(wuffs_xz__error__bad_block_header);
      goto exit;
    }
    while (v_padded_size_have < v_padded_size_want) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_2 = *iop_a_src++;
        v_c8 = t_2;
      }
      if (v_c8 != 0u) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_block_header);
        goto exit;
      }
      v_padded_size_have += 1u;
    }

    ok:
    self->private_impl.p_decode_block_header_with_padding = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_block_header_with_padding = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_block_header_with_padding.v_padded_size_have = v_padded_size_have;
  self->private_data.s_decode_block_header_with_padding.v_padded_size_want = v_padded_size_want;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func xz.decoder.decode_block_header_sans_padding

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__decode_block_header_sans_padding(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_c32 = 0;
  uint32_t v_alignment = 0;
  uint8_t v_flags = 0;
  uint8_t v_filter_id = 0;
  wuffs_base__status v_status = wuffs_base__make_status(NULL);
  uint32_t v_shift = 0;
  uint32_t v_f = 0;
  uint32_t v_k = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_decode_block_header_sans_padding;
  if (coro_susp_point) {
    v_flags = self->private_data.s_decode_block_header_sans_padding.v_flags;
    v_filter_id = self->private_data.s_decode_block_header_sans_padding.v_filter_id;
    v_shift = self->private_data.s_decode_block_header_sans_padding.v_shift;
    v_f = self->private_data.s_decode_block_header_sans_padding.v_f;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_0 = *iop_a_src++;
      v_flags = t_0;
    }
    self->private_impl.f_num_non_final_filters = ((uint32_t)(((uint8_t)(v_flags & 3u))));
    if (((uint8_t)(v_flags & 60u)) != 0u) {
      status = wuffs_base__make_status(wuffs_xz__error__bad_block_header);
      goto exit;
    }
    self->private_impl.f_block_has_compressed_size = (((uint8_t)(v_flags & 64u)) != 0u);
    if (self->private_impl.f_block_has_compressed_size) {
      self->private_impl.f_block_compressed_size = 0u;
      v_shift = 0u;
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
        if (v_shift <= 56u) {
          self->private_impl.f_block_compressed_size |= (((uint64_t)(((uint8_t)(v_c8 & 127u)))) << v_shift);
          if (v_c8 >= 128u) {
            v_shift += 7u;
            continue;
          } else if ((v_c8 == 0u) && (v_shift > 0u)) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_block_header);
            goto exit;
          }
          break;
        } else if (v_c8 != 1u) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_block_header);
          goto exit;
        }
        self->private_impl.f_block_compressed_size |= (((uint64_t)(1u)) << 63u);
        break;
      }
    }
    self->private_impl.f_block_has_uncompressed_size = (((uint8_t)(v_flags & 128u)) != 0u);
    if (self->private_impl.f_block_has_uncompressed_size) {
      self->private_impl.f_block_uncompressed_size = 0u;
      v_shift = 0u;
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          v_c8 = t_2;
        }
        if (v_shift <= 56u) {
          self->private_impl.f_block_uncompressed_size |= (((uint64_t)(((uint8_t)(v_c8 & 127u)))) << v_shift);
          if (v_c8 >= 128u) {
            v_shift += 7u;
            continue;
          } else if ((v_c8 == 0u) && (v_shift > 0u)) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_block_header);
            goto exit;
          }
          break;
        } else if (v_c8 != 1u) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_block_header);
          goto exit;
        }
        self->private_impl.f_block_uncompressed_size |= (((uint64_t)(1u)) << 63u);
        break;
      }
    }
    self->private_impl.f_bcj_x86_prev_mask = 0u;
    self->private_impl.choosy_apply_non_final_filters = (
        &wuffs_xz__decoder__apply_non_final_filters__choosy_default);
    v_f = 0u;
    while (v_f < self->private_impl.f_num_non_final_filters) {
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_3 = *iop_a_src++;
        v_filter_id = t_3;
      }
      if (v_filter_id == 33u) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_filter);
        goto exit;
      } else if (v_filter_id == 3u) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_4 = *iop_a_src++;
          v_c8 = t_4;
        }
        if (v_c8 != 1u) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_filter);
          goto exit;
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_5 = *iop_a_src++;
          v_c8 = t_5;
        }
        self->private_impl.f_filters[v_f] = ((((uint32_t)(v_c8)) << 8u) | 3u);
        v_k = 0u;
        while (v_k < 256u) {
          self->private_data.f_filter_data[v_f][v_k] = 0u;
          v_k += 1u;
        }
      } else if ((v_filter_id < 3u) || (11u < v_filter_id)) {
        status = wuffs_base__make_status(wuffs_xz__error__unsupported_filter);
        goto exit;
      } else if (v_f != 0u) {
        status = wuffs_base__make_status(wuffs_xz__error__unsupported_filter_combination);
        goto exit;
      } else {
        self->private_impl.f_filters[v_f] = ((uint32_t)(v_filter_id));
        if (v_filter_id == 4u) {
          self->private_impl.choosy_apply_non_final_filters = (
              &wuffs_xz__decoder__apply_filter_04_x86);
        } else if (v_filter_id == 5u) {
          self->private_impl.choosy_apply_non_final_filters = (
              &wuffs_xz__decoder__apply_filter_05_powerpc);
        } else if (v_filter_id == 6u) {
          self->private_impl.choosy_apply_non_final_filters = (
              &wuffs_xz__decoder__apply_filter_06_ia64);
        } else if (v_filter_id == 7u) {
          self->private_impl.choosy_apply_non_final_filters = (
              &wuffs_xz__decoder__apply_filter_07_arm);
        } else if (v_filter_id == 8u) {
          self->private_impl.choosy_apply_non_final_filters = (
              &wuffs_xz__decoder__apply_filter_08_armthumb);
        } else if (v_filter_id == 9u) {
          self->private_impl.choosy_apply_non_final_filters = (
              &wuffs_xz__decoder__apply_filter_09_sparc);
        } else if (v_filter_id == 10u) {
          self->private_impl.choosy_apply_non_final_filters = (
              &wuffs_xz__decoder__apply_filter_0a_arm64);
        } else {
          self->private_impl.choosy_apply_non_final_filters = (
              &wuffs_xz__decoder__apply_filter_0b_riscv);
        }
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_6 = *iop_a_src++;
          v_c8 = t_6;
        }
        if (v_c8 == 0u) {
          self->private_impl.f_bcj_pos = 0u;
        } else if (v_c8 == 4u) {
          {
            WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
            uint32_t t_7;
            if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
              t_7 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
              iop_a_src += 4;
            } else {
              self->private_data.s_decode_block_header_sans_padding.scratch = 0;
              WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
              while (true) {
                if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
                  status = wuffs_base__make_status(wuffs_base__suspension__short_read);
                  goto suspend;
                }
                uint64_t* scratch = &self->private_data.s_decode_block_header_sans_padding.scratch;
                uint32_t num_bits_7 = ((uint32_t)(*scratch >> 56));
                *scratch <<= 8;
                *scratch >>= 8;
                *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_7;
                if (num_bits_7 == 24) {
                  t_7 = ((uint32_t)(*scratch));
                  break;
                }
                num_bits_7 += 8u;
                *scratch |= ((uint64_t)(num_bits_7)) << 56;
              }
            }
            v_c32 = t_7;
          }
          v_alignment = ((uint32_t)(WUFFS_XZ__BCJ_OFFSET_ALIGNMENT[v_filter_id]));
          if (v_alignment > 0u) {
            if ((v_c32 % v_alignment) != 0u) {
              status = wuffs_base__make_status(wuffs_xz__error__bad_bcj_offset);
              goto exit;
            }
          }
          self->private_impl.f_bcj_pos = v_c32;
        } else {
          status = wuffs_base__make_status(wuffs_xz__error__unsupported_filter);
          goto exit;
        }
      }
      v_f += 1u;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
      if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
        status = wuffs_base__make_status(wuffs_base__suspension__short_read);
        goto suspend;
      }
      uint8_t t_8 = *iop_a_src++;
      v_filter_id = t_8;
    }
    if (v_filter_id == 33u) {
      if (self->private_impl.f_lzma_needs_reset) {
        wuffs_private_impl__ignore_status(wuffs_lzma__decoder__initialize(&self->private_data.f_lzma,
            sizeof (wuffs_lzma__decoder), WUFFS_VERSION, WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED));
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_9 = *iop_a_src++;
        v_c8 = t_9;
      }
      if (v_c8 != 1u) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_filter);
        goto exit;
      }
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_10 = *iop_a_src++;
        v_c8 = t_10;
      }
      v_status = wuffs_lzma__decoder__set_quirk(&self->private_data.f_lzma, 1290294273u, (2u | (((uint64_t)(v_c8)) << 8u)));
      if ( ! wuffs_base__status__is_ok(&v_status)) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_filter);
        goto exit;
      }
    } else if ((v_filter_id < 3u) || (11u < v_filter_id)) {
      status = wuffs_base__make_status(wuffs_xz__error__unsupported_filter);
      goto exit;
    } else {
      status = wuffs_base__make_status(wuffs_xz__error__bad_filter);
      goto exit;
    }

    goto ok;
    ok:
    self->private_impl.p_decode_block_header_sans_padding = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_decode_block_header_sans_padding = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_decode_block_header_sans_padding.v_flags = v_flags;
  self->private_data.s_decode_block_header_sans_padding.v_filter_id = v_filter_id;
  self->private_data.s_decode_block_header_sans_padding.v_shift = v_shift;
  self->private_data.s_decode_block_header_sans_padding.v_f = v_f;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func xz.decoder.verify_index

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__verify_index(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint8_t v_c8 = 0;
  uint32_t v_shift = 0;
  uint32_t v_hash = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_verify_index;
  if (coro_susp_point) {
    v_shift = self->private_data.s_verify_index.v_shift;
  }
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    if ( ! self->private_impl.f_started_verify_index) {
      self->private_impl.f_started_verify_index = true;
      {
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
        if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
          status = wuffs_base__make_status(wuffs_base__suspension__short_read);
          goto suspend;
        }
        uint8_t t_0 = *iop_a_src++;
        v_c8 = t_0;
      }
      if (v_c8 != 0u) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_index);
        goto exit;
      }
      self->private_impl.f_num_index_blocks = 0u;
      v_shift = 0u;
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_1 = *iop_a_src++;
          v_c8 = t_1;
        }
        if (v_shift <= 56u) {
          self->private_impl.f_num_index_blocks |= (((uint64_t)(((uint8_t)(v_c8 & 127u)))) << v_shift);
          if (v_c8 >= 128u) {
            v_shift += 7u;
            continue;
          } else if ((v_c8 == 0u) && (v_shift > 0u)) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_index);
            goto exit;
          }
          break;
        } else if (v_c8 != 1u) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_index);
          goto exit;
        }
        self->private_impl.f_num_index_blocks |= (((uint64_t)(1u)) << 63u);
        break;
      }
      if (self->private_impl.f_num_index_blocks != self->private_impl.f_num_actual_blocks) {
        status = wuffs_base__make_status(wuffs_xz__error__bad_index);
        goto exit;
      }
    }
    while (self->private_impl.f_num_index_blocks > 0u) {
      self->private_impl.f_num_index_blocks -= 1u;
      self->private_impl.f_index_block_compressed_size = 0u;
      v_shift = 0u;
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_2 = *iop_a_src++;
          v_c8 = t_2;
        }
        if (v_shift <= 56u) {
          self->private_impl.f_index_block_compressed_size |= (((uint64_t)(((uint8_t)(v_c8 & 127u)))) << v_shift);
          if (v_c8 >= 128u) {
            v_shift += 7u;
            continue;
          } else if ((v_c8 == 0u) && (v_shift > 0u)) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_index);
            goto exit;
          }
          break;
        } else if (v_c8 != 1u) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_index);
          goto exit;
        }
        self->private_impl.f_index_block_compressed_size |= (((uint64_t)(1u)) << 63u);
        break;
      }
      self->private_impl.f_index_block_uncompressed_size = 0u;
      v_shift = 0u;
      while (true) {
        {
          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint8_t t_3 = *iop_a_src++;
          v_c8 = t_3;
        }
        if (v_shift <= 56u) {
          self->private_impl.f_index_block_uncompressed_size |= (((uint64_t)(((uint8_t)(v_c8 & 127u)))) << v_shift);
          if (v_c8 >= 128u) {
            v_shift += 7u;
            continue;
          } else if ((v_c8 == 0u) && (v_shift > 0u)) {
            status = wuffs_base__make_status(wuffs_xz__error__bad_index);
            goto exit;
          }
          break;
        } else if (v_c8 != 1u) {
          status = wuffs_base__make_status(wuffs_xz__error__bad_index);
          goto exit;
        }
        self->private_impl.f_index_block_uncompressed_size |= (((uint64_t)(1u)) << 63u);
        break;
      }
      self->private_impl.f_verification_want_total_sizes[0u] += self->private_impl.f_index_block_compressed_size;
      v_hash = ((uint32_t)((self->private_impl.f_index_block_compressed_size ^ (self->private_impl.f_index_block_compressed_size >> 32u))));
      v_hash *= 3432918353u;
      v_hash = (((uint32_t)(v_hash << 15u)) | (v_hash >> 17u));
      v_hash *= 461845907u;
      v_hash ^= self->private_impl.f_verification_want_hashed_sizes[0u];
      v_hash = (((uint32_t)(v_hash << 13u)) | (v_hash >> 19u));
      self->private_impl.f_verification_want_hashed_sizes[0u] = ((uint32_t)(((uint32_t)(v_hash * 5u)) + 3864292196u));
      self->private_impl.f_verification_want_total_sizes[1u] += self->private_impl.f_index_block_uncompressed_size;
      v_hash = ((uint32_t)((self->private_impl.f_index_block_uncompressed_size ^ (self->private_impl.f_index_block_uncompressed_size >> 32u))));
      v_hash *= 3432918353u;
      v_hash = (((uint32_t)(v_hash << 15u)) | (v_hash >> 17u));
      v_hash *= 461845907u;
      v_hash ^= self->private_impl.f_verification_want_hashed_sizes[1u];
      v_hash = (((uint32_t)(v_hash << 13u)) | (v_hash >> 19u));
      self->private_impl.f_verification_want_hashed_sizes[1u] = ((uint32_t)(((uint32_t)(v_hash * 5u)) + 3864292196u));
    }
    if ((self->private_impl.f_verification_have_hashed_sizes[0u] != self->private_impl.f_verification_want_hashed_sizes[0u]) ||
        (self->private_impl.f_verification_have_hashed_sizes[1u] != self->private_impl.f_verification_want_hashed_sizes[1u]) ||
        (self->private_impl.f_verification_have_total_sizes[0u] != self->private_impl.f_verification_want_total_sizes[0u]) ||
        (self->private_impl.f_verification_have_total_sizes[1u] != self->private_impl.f_verification_want_total_sizes[1u])) {
      status = wuffs_base__make_status(wuffs_xz__error__bad_index);
      goto exit;
    }

    goto ok;
    ok:
    self->private_impl.p_verify_index = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_verify_index = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;
  self->private_data.s_verify_index.v_shift = v_shift;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

// -------- func xz.decoder.verify_footer

WUFFS_BASE__GENERATED_C_CODE
static wuffs_base__status
wuffs_xz__decoder__verify_footer(
    wuffs_xz__decoder* self,
    wuffs_base__io_buffer* a_src) {
  wuffs_base__status status = wuffs_base__make_status(NULL);

  uint32_t v_c32 = 0;

  const uint8_t* iop_a_src = NULL;
  const uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  const uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL;
  if (a_src && a_src->data.ptr) {
    io0_a_src = a_src->data.ptr;
    io1_a_src = io0_a_src + a_src->meta.ri;
    iop_a_src = io1_a_src;
    io2_a_src = io0_a_src + a_src->meta.wi;
  }

  uint32_t coro_susp_point = self->private_impl.p_verify_footer;
  switch (coro_susp_point) {
    WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;

    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
      uint32_t t_0;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) {
        t_0 = wuffs_base__peek_u32le__no_bounds_check(iop_a_src);
        iop_a_src += 4;
      } else {
        self->private_data.s_verify_footer.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_verify_footer.scratch;
          uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
          if (num_bits_0 == 24) {
            t_0 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_0 += 8u;
          *scratch |= ((uint64_t)(num_bits_0)) << 56;
        }
      }
      v_c32 = t_0;
    }
    if (v_c32 != ((uint32_t)(self->private_impl.f_backwards_size))) {
      status = wuffs_base__make_status(wuffs_xz__error__bad_footer);
      goto exit;
    }
    {
      WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
      uint32_t t_1;
      if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) {
        t_1 = ((uint32_t)(wuffs_base__peek_u16le__no_bounds_check(iop_a_src)));
        iop_a_src += 2;
      } else {
        self->private_data.s_verify_footer.scratch = 0;
        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
        while (true) {
          if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) {
            status = wuffs_base__make_status(wuffs_base__suspension__short_read);
            goto suspend;
          }
          uint64_t* scratch = &self->private_data.s_verify_footer.scratch;
          uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56));
          *scratch <<= 8;
          *scratch >>= 8;
          *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1;
          if (num_bits_1 == 8) {
            t_1 = ((uint32_t)(*scratch));
            break;
          }
          num_bits_1 += 8u;
          *scratch |= ((uint64_t)(num_bits_1)) << 56;
        }
      }
      v_c32 = t_1;
    }
    if (v_c32 != ((uint32_t)(self->private_impl.f_flags))) {
      status = wuffs_base__make_status(wuffs_xz__error__bad_footer);
      goto exit;
    }

    goto ok;
    ok:
    self->private_impl.p_verify_footer = 0;
    goto exit;
  }

  goto suspend;
  suspend:
  self->private_impl.p_verify_footer = wuffs_base__status__is_suspension(&status) ? coro_susp_point : 0;

  goto exit;
  exit:
  if (a_src && a_src->data.ptr) {
    a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
  }

  return status;
}

#endif  // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__XZ)

#if defined(__cplusplus) && defined(WUFFS_BASE__HAVE_UNIQUE_PTR)

// ---------------- Auxiliary - Base

// Auxiliary code is discussed at
// https://github.com/google/wuffs/blob/main/doc/note/auxiliary-code.md

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__AUX__BASE)

namespace wuffs_aux {

namespace sync_io {

// --------

DynIOBuffer::DynIOBuffer(uint64_t max_incl)
    : m_buf(wuffs_base__empty_io_buffer()), m_max_incl(max_incl) {}

DynIOBuffer::~DynIOBuffer() {
  free(m_buf.data.ptr);
}

void  //
DynIOBuffer::drop() {
  free(m_buf.data.ptr);
  m_buf = wuffs_base__empty_io_buffer();
}

DynIOBuffer::GrowResult  //
DynIOBuffer::grow(uint64_t min_incl) {
  uint64_t n = round_up(min_incl, m_max_incl);
  if (n == 0) {
    return ((min_incl == 0) && (m_max_incl == 0))
               ? DynIOBuffer::GrowResult::OK
               : DynIOBuffer::GrowResult::FailedMaxInclExceeded;
  } else if (n > SIZE_MAX) {
    return DynIOBuffer::GrowResult::FailedOutOfMemory;
  } else if (n > m_buf.data.len) {
    uint8_t* ptr =
        static_cast<uint8_t*>(realloc(m_buf.data.ptr, static_cast<size_t>(n)));
    if (!ptr) {
      return DynIOBuffer::GrowResult::FailedOutOfMemory;
    }
    m_buf.data.ptr = ptr;
    m_buf.data.len = static_cast<size_t>(n);
  }
  return DynIOBuffer::GrowResult::OK;
}

// round_up rounds min_incl up, returning the smallest value x satisfying
// (min_incl <= x) and (x <= max_incl) and some other constraints. It returns 0
// if there is no such x.
//
// When max_incl <= 4096, the other constraints are:
//  - (x == max_incl)
//
// When max_incl >  4096, the other constraints are:
//  - (x == max_incl) or (x is a power of 2)
//  - (x >= 4096)
uint64_t  //
DynIOBuffer::round_up(uint64_t min_incl, uint64_t max_incl) {
  if (min_incl > max_incl) {
    return 0;
  }
  uint64_t n = 4096;
  if (n >= max_incl) {
    return max_incl;
  }
  while (n < min_incl) {
    if (n >= (max_incl / 2)) {
      return max_incl;
    }
    n *= 2;
  }
  return n;
}

// --------

Input::~Input() {}

IOBuffer*  //
Input::BringsItsOwnIOBuffer() {
  return nullptr;
}

// --------

FileInput::FileInput(FILE* f) : m_f(f) {}

std::string  //
FileInput::CopyIn(IOBuffer* dst) {
  if (!m_f) {
    return "wuffs_aux::sync_io::FileInput: nullptr file";
  } else if (!dst) {
    return "wuffs_aux::sync_io::FileInput: nullptr IOBuffer";
  } else if (dst->meta.closed) {
    return "wuffs_aux::sync_io::FileInput: end of file";
  } else {
    dst->compact();
    size_t n = fread(dst->writer_pointer(), 1, dst->writer_length(), m_f);
    dst->meta.wi += n;
    dst->meta.closed = feof(m_f);
    if (ferror(m_f)) {
      return "wuffs_aux::sync_io::FileInput: error reading file";
    }
  }
  return "";
}

// --------

MemoryInput::MemoryInput(const char* ptr, size_t len)
    : m_io(wuffs_base__ptr_u8__reader(
          static_cast<uint8_t*>(static_cast<void*>(const_cast<char*>(ptr))),
          len,
          true)) {}

MemoryInput::MemoryInput(const uint8_t* ptr, size_t len)
    : m_io(wuffs_base__ptr_u8__reader(const_cast<uint8_t*>(ptr), len, true)) {}

IOBuffer*  //
MemoryInput::BringsItsOwnIOBuffer() {
  return &m_io;
}

std::string  //
MemoryInput::CopyIn(IOBuffer* dst) {
  if (!dst) {
    return "wuffs_aux::sync_io::MemoryInput: nullptr IOBuffer";
  } else if (dst->meta.closed) {
    return "wuffs_aux::sync_io::MemoryInput: end of file";
  } else if (wuffs_base__slice_u8__overlaps(dst->data, m_io.data)) {
    // Treat m_io's data as immutable, so don't compact dst or otherwise write
    // to it.
    return "wuffs_aux::sync_io::MemoryInput: overlapping buffers";
  } else {
    dst->compact();
    size_t nd = dst->writer_length();
    size_t ns = m_io.reader_length();
    size_t n = (nd < ns) ? nd : ns;
    memcpy(dst->writer_pointer(), m_io.reader_pointer(), n);
    m_io.meta.ri += n;
    dst->meta.wi += n;
    dst->meta.closed = m_io.reader_length() == 0;
  }
  return "";
}

// --------

}  // namespace sync_io

namespace private_impl {

struct ErrorMessages {
  const char* max_incl_metadata_length_exceeded;
  const char* out_of_memory;
  const char* unexpected_end_of_file;
  const char* unsupported_metadata;
  const char* unsupported_negative_advance;

  // If adding new "const char*" typed fields to this struct, either add them
  // after existing fields or, if re-ordering fields, make sure that you update
  // all of the "const private_impl::ErrorMessages FooBarErrorMessages" values
  // in all of the sibling *.cc files.

  static inline const char* resolve(const char* s) {
    return s ? s : "wuffs_aux::private_impl: unknown error";
  };
};

std::string  //
AdvanceIOBufferTo(const ErrorMessages& error_messages,
                  sync_io::Input& input,
                  IOBuffer& io_buf,
                  uint64_t absolute_position) {
  if (absolute_position < io_buf.reader_position()) {
    return error_messages.resolve(error_messages.unsupported_negative_advance);
  }
  while (true) {
    uint64_t relative_position = absolute_position - io_buf.reader_position();
    if (relative_position <= io_buf.reader_length()) {
      io_buf.meta.ri += (size_t)relative_position;
      break;
    } else if (io_buf.meta.closed) {
      return error_messages.resolve(error_messages.unexpected_end_of_file);
    }
    io_buf.meta.ri = io_buf.meta.wi;
    if (!input.BringsItsOwnIOBuffer()) {
      io_buf.compact();
    }
    std::string error_message = input.CopyIn(&io_buf);
    if (!error_message.empty()) {
      return error_message;
    }
  }
  return "";
}

std::string  //
HandleMetadata(
    const ErrorMessages& error_messages,
    sync_io::Input& input,
    wuffs_base__io_buffer& io_buf,
    sync_io::DynIOBuffer& raw,
    wuffs_base__status (*tell_me_more_func)(void*,
                                            wuffs_base__io_buffer*,
                                            wuffs_base__more_information*,
                                            wuffs_base__io_buffer*),
    void* tell_me_more_receiver,
    std::string (*handle_metadata_func)(void*,
                                        const wuffs_base__more_information*,
                                        wuffs_base__slice_u8),
    void* handle_metadata_receiver) {
  wuffs_base__more_information minfo = wuffs_base__empty_more_information();
  // Reset raw but keep its backing array (the raw.m_buf.data slice).
  raw.m_buf.meta = wuffs_base__empty_io_buffer_meta();

  while (true) {
    minfo = wuffs_base__empty_more_information();
    wuffs_base__status status = (*tell_me_more_func)(
        tell_me_more_receiver, &raw.m_buf, &minfo, &io_buf);
    switch (minfo.flavor) {
      case 0:
      case WUFFS_BASE__MORE_INFORMATION__FLAVOR__METADATA_RAW_TRANSFORM:
      case WUFFS_BASE__MORE_INFORMATION__FLAVOR__METADATA_PARSED:
        break;

      case WUFFS_BASE__MORE_INFORMATION__FLAVOR__METADATA_RAW_PASSTHROUGH: {
        wuffs_base__range_ie_u64 r = minfo.metadata_raw_passthrough__range();
        if (r.is_empty()) {
          break;
        }
        uint64_t num_to_copy = r.length();
        if (num_to_copy > (raw.m_max_incl - raw.m_buf.meta.wi)) {
          return error_messages.resolve(
              error_messages.max_incl_metadata_length_exceeded);
        } else if (num_to_copy > (raw.m_buf.data.len - raw.m_buf.meta.wi)) {
          switch (raw.grow(num_to_copy + raw.m_buf.meta.wi)) {
            case sync_io::DynIOBuffer::GrowResult::OK:
              break;
            case sync_io::DynIOBuffer::GrowResult::FailedMaxInclExceeded:
              return error_messages.resolve(
                  error_messages.max_incl_metadata_length_exceeded);
            case sync_io::DynIOBuffer::GrowResult::FailedOutOfMemory:
              return error_messages.resolve(error_messages.out_of_memory);
          }
        }

        if (io_buf.reader_position() > r.min_incl) {
          return error_messages.resolve(error_messages.unsupported_metadata);
        } else {
          std::string error_message =
              AdvanceIOBufferTo(error_messages, input, io_buf, r.min_incl);
          if (!error_message.empty()) {
            return error_message;
          }
        }

        while (true) {
          uint64_t n =
              wuffs_base__u64__min(num_to_copy, io_buf.reader_length());
          memcpy(raw.m_buf.writer_pointer(), io_buf.reader_pointer(), n);
          raw.m_buf.meta.wi += n;
          io_buf.meta.ri += n;
          num_to_copy -= n;
          if (num_to_copy == 0) {
            break;
          } else if (io_buf.meta.closed) {
            return error_messages.resolve(
                error_messages.unexpected_end_of_file);
          } else if (!input.BringsItsOwnIOBuffer()) {
            io_buf.compact();
          }
          std::string error_message = input.CopyIn(&io_buf);
          if (!error_message.empty()) {
            return error_message;
          }
        }
        break;
      }

      default:
        return error_messages.resolve(error_messages.unsupported_metadata);
    }

    if (status.repr == nullptr) {
      break;
    } else if (status.repr != wuffs_base__suspension__even_more_information) {
      if (status.repr != wuffs_base__suspension__short_write) {
        return status.message();
      }
      switch (raw.grow(wuffs_base__u64__sat_add(raw.m_buf.data.len, 1))) {
        case sync_io::DynIOBuffer::GrowResult::OK:
          break;
        case sync_io::DynIOBuffer::GrowResult::FailedMaxInclExceeded:
          return error_messages.resolve(
              error_messages.max_incl_metadata_length_exceeded);
        case sync_io::DynIOBuffer::GrowResult::FailedOutOfMemory:
          return error_messages.resolve(error_messages.out_of_memory);
      }
    }
  }

  return (*handle_metadata_func)(handle_metadata_receiver, &minfo,
                                 raw.m_buf.reader_slice());
}

}  // namespace private_impl

}  // namespace wuffs_aux

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__AUX__BASE)

// ---------------- Auxiliary - CBOR

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__AUX__CBOR)

#include <utility>

namespace wuffs_aux {

DecodeCborResult::DecodeCborResult(std::string&& error_message0,
                                   uint64_t cursor_position0)
    : error_message(std::move(error_message0)),
      cursor_position(cursor_position0) {}

DecodeCborCallbacks::~DecodeCborCallbacks() {}

void  //
DecodeCborCallbacks::Done(DecodeCborResult& result,
                          sync_io::Input& input,
                          IOBuffer& buffer) {}

DecodeCborArgQuirks::DecodeCborArgQuirks(const QuirkKeyValuePair* ptr0,
                                         const size_t len0)
    : ptr(ptr0), len(len0) {}

DecodeCborArgQuirks  //
DecodeCborArgQuirks::DefaultValue() {
  return DecodeCborArgQuirks(nullptr, 0);
}

DecodeCborResult  //
DecodeCbor(DecodeCborCallbacks& callbacks,
           sync_io::Input& input,
           DecodeCborArgQuirks quirks) {
  // Prepare the wuffs_base__io_buffer and the resultant error_message.
  wuffs_base__io_buffer* io_buf = input.BringsItsOwnIOBuffer();
  wuffs_base__io_buffer fallback_io_buf = wuffs_base__empty_io_buffer();
  std::unique_ptr<uint8_t[]> fallback_io_array(nullptr);
  if (!io_buf) {
    fallback_io_array = std::unique_ptr<uint8_t[]>(new uint8_t[4096]);
    fallback_io_buf = wuffs_base__ptr_u8__writer(fallback_io_array.get(), 4096);
    io_buf = &fallback_io_buf;
  }
  // cursor_index is discussed at
  // https://nigeltao.github.io/blog/2020/jsonptr.html#the-cursor-index
  size_t cursor_index = 0;
  std::string ret_error_message;
  std::string io_error_message;

  do {
    // Prepare the low-level CBOR decoder.
    wuffs_cbor__decoder::unique_ptr dec = wuffs_cbor__decoder::alloc();
    if (!dec) {
      ret_error_message = "wuffs_aux::DecodeCbor: out of memory";
      goto done;
    }
    for (size_t i = 0; i < quirks.len; i++) {
      dec->set_quirk(quirks.ptr[i].first, quirks.ptr[i].second);
    }

    // Prepare the wuffs_base__tok_buffer. 256 tokens is 2KiB.
    wuffs_base__token tok_array[256];
    wuffs_base__token_buffer tok_buf =
        wuffs_base__slice_token__writer(wuffs_base__make_slice_token(
            &tok_array[0], (sizeof(tok_array) / sizeof(tok_array[0]))));
    wuffs_base__status tok_status = wuffs_base__make_status(nullptr);

    // Prepare other state.
    int32_t depth = 0;
    std::string str;
    int64_t extension_category = 0;
    uint64_t extension_detail = 0;

    // Valid token's VBCs range in 0 ..= 15. Values over that are for tokens
    // from outside of the base package, such as the CBOR package.
    constexpr int64_t EXT_CAT__CBOR_TAG = 16;

    // Loop, doing these two things:
    //  1. Get the next token.
    //  2. Process that token.
    while (true) {
      // 1. Get the next token.

      while (tok_buf.meta.ri >= tok_buf.meta.wi) {
        if (tok_status.repr == nullptr) {
          // No-op.
        } else if (tok_status.repr == wuffs_base__suspension__short_write) {
          tok_buf.compact();
        } else if (tok_status.repr == wuffs_base__suspension__short_read) {
          // Read from input to io_buf.
          if (!io_error_message.empty()) {
            ret_error_message = std::move(io_error_message);
            goto done;
          } else if (cursor_index != io_buf->meta.ri) {
            ret_error_message =
                "wuffs_aux::DecodeCbor: internal error: bad cursor_index";
            goto done;
          } else if (io_buf->meta.closed) {
            ret_error_message =
                "wuffs_aux::DecodeCbor: internal error: io_buf is closed";
            goto done;
          }
          io_buf->compact();
          if (io_buf->meta.wi >= io_buf->data.len) {
            ret_error_message =
                "wuffs_aux::DecodeCbor: internal error: io_buf is full";
            goto done;
          }
          cursor_index = io_buf->meta.ri;
          io_error_message = input.CopyIn(io_buf);
        } else {
          ret_error_message = tok_status.message();
          goto done;
        }

        if (WUFFS_CBOR__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE != 0) {
          ret_error_message =
              "wuffs_aux::DecodeCbor: internal error: bad WORKBUF_LEN";
          goto done;
        }
        wuffs_base__slice_u8 work_buf = wuffs_base__empty_slice_u8();
        tok_status = dec->decode_tokens(&tok_buf, io_buf, work_buf);
        if ((tok_buf.meta.ri > tok_buf.meta.wi) ||
            (tok_buf.meta.wi > tok_buf.data.len) ||
            (io_buf->meta.ri > io_buf->meta.wi) ||
            (io_buf->meta.wi > io_buf->data.len)) {
          ret_error_message =
              "wuffs_aux::DecodeCbor: internal error: bad buffer indexes";
          goto done;
        }
      }

      wuffs_base__token token = tok_buf.data.ptr[tok_buf.meta.ri++];
      uint64_t token_len = token.length();
      if ((io_buf->meta.ri < cursor_index) ||
          ((io_buf->meta.ri - cursor_index) < token_len)) {
        ret_error_message =
            "wuffs_aux::DecodeCbor: internal error: bad token indexes";
        goto done;
      }
      uint8_t* token_ptr = io_buf->data.ptr + cursor_index;
      cursor_index += static_cast<size_t>(token_len);

      // 2. Process that token.

      uint64_t vbd = token.value_base_detail();

      if (extension_category != 0) {
        int64_t ext = token.value_extension();
        if ((ext >= 0) && !token.continued()) {
          extension_detail = (extension_detail
                              << WUFFS_BASE__TOKEN__VALUE_EXTENSION__NUM_BITS) |
                             static_cast<uint64_t>(ext);
          switch (extension_category) {
            case WUFFS_BASE__TOKEN__VBC__INLINE_INTEGER_SIGNED:
              extension_category = 0;
              ret_error_message =
                  callbacks.AppendI64(static_cast<int64_t>(extension_detail));
              goto parsed_a_value;
            case WUFFS_BASE__TOKEN__VBC__INLINE_INTEGER_UNSIGNED:
              extension_category = 0;
              ret_error_message = callbacks.AppendU64(extension_detail);
              goto parsed_a_value;
            case EXT_CAT__CBOR_TAG:
              extension_category = 0;
              ret_error_message = callbacks.AppendCborTag(extension_detail);
              if (!ret_error_message.empty()) {
                goto done;
              }
              continue;
          }
        }
        ret_error_message =
            "wuffs_aux::DecodeCbor: internal error: bad extended token";
        goto done;
      }

      switch (token.value_base_category()) {
        case WUFFS_BASE__TOKEN__VBC__FILLER:
          continue;

        case WUFFS_BASE__TOKEN__VBC__STRUCTURE: {
          if (vbd & WUFFS_BASE__TOKEN__VBD__STRUCTURE__PUSH) {
            ret_error_message = callbacks.Push(static_cast<uint32_t>(vbd));
            if (!ret_error_message.empty()) {
              goto done;
            }
            depth++;
            if (depth > (int32_t)WUFFS_CBOR__DECODER_DEPTH_MAX_INCL) {
              ret_error_message =
                  "wuffs_aux::DecodeCbor: internal error: bad depth";
              goto done;
            }
            continue;
          }
          ret_error_message = callbacks.Pop(static_cast<uint32_t>(vbd));
          depth--;
          if (depth < 0) {
            ret_error_message =
                "wuffs_aux::DecodeCbor: internal error: bad depth";
            goto done;
          }
          goto parsed_a_value;
        }

        case WUFFS_BASE__TOKEN__VBC__STRING: {
          if (vbd & WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_0_DST_1_SRC_DROP) {
            // No-op.
          } else if (vbd &
                     WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_1_DST_1_SRC_COPY) {
            const char* ptr =  // Convert from (uint8_t*).
                static_cast<const char*>(static_cast<void*>(token_ptr));
            str.append(ptr, static_cast<size_t>(token_len));
          } else {
            goto fail;
          }
          if (token.continued()) {
            continue;
          }
          ret_error_message =
              (vbd & WUFFS_BASE__TOKEN__VBD__STRING__CHAIN_MUST_BE_UTF_8)
                  ? callbacks.AppendTextString(std::move(str))
                  : callbacks.AppendByteString(std::move(str));
          str.clear();
          goto parsed_a_value;
        }

        case WUFFS_BASE__TOKEN__VBC__UNICODE_CODE_POINT: {
          uint8_t u[WUFFS_BASE__UTF_8__BYTE_LENGTH__MAX_INCL];
          size_t n = wuffs_base__utf_8__encode(
              wuffs_base__make_slice_u8(
                  &u[0], WUFFS_BASE__UTF_8__BYTE_LENGTH__MAX_INCL),
              static_cast<uint32_t>(vbd));
          const char* ptr =  // Convert from (uint8_t*).
              static_cast<const char*>(static_cast<void*>(&u[0]));
          str.append(ptr, n);
          if (token.continued()) {
            continue;
          }
          goto fail;
        }

        case WUFFS_BASE__TOKEN__VBC__LITERAL: {
          if (vbd & WUFFS_BASE__TOKEN__VBD__LITERAL__NULL) {
            ret_error_message = callbacks.AppendNull();
          } else if (vbd & WUFFS_BASE__TOKEN__VBD__LITERAL__UNDEFINED) {
            ret_error_message = callbacks.AppendUndefined();
          } else {
            ret_error_message = callbacks.AppendBool(
                vbd & WUFFS_BASE__TOKEN__VBD__LITERAL__TRUE);
          }
          goto parsed_a_value;
        }

        case WUFFS_BASE__TOKEN__VBC__NUMBER: {
          const uint64_t cfp_fbbe_fifb =
              WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_FLOATING_POINT |
              WUFFS_BASE__TOKEN__VBD__NUMBER__FORMAT_BINARY_BIG_ENDIAN |
              WUFFS_BASE__TOKEN__VBD__NUMBER__FORMAT_IGNORE_FIRST_BYTE;
          if ((vbd & cfp_fbbe_fifb) == cfp_fbbe_fifb) {
            double f;
            switch (token_len) {
              case 3:
                f = wuffs_base__ieee_754_bit_representation__from_u16_to_f64(
                    wuffs_base__peek_u16be__no_bounds_check(token_ptr + 1));
                break;
              case 5:
                f = wuffs_base__ieee_754_bit_representation__from_u32_to_f64(
                    wuffs_base__peek_u32be__no_bounds_check(token_ptr + 1));
                break;
              case 9:
                f = wuffs_base__ieee_754_bit_representation__from_u64_to_f64(
                    wuffs_base__peek_u64be__no_bounds_check(token_ptr + 1));
                break;
              default:
                goto fail;
            }
            ret_error_message = callbacks.AppendF64(f);
            goto parsed_a_value;
          }
          goto fail;
        }

        case WUFFS_BASE__TOKEN__VBC__INLINE_INTEGER_SIGNED: {
          if (token.continued()) {
            extension_category = WUFFS_BASE__TOKEN__VBC__INLINE_INTEGER_SIGNED;
            extension_detail =
                static_cast<uint64_t>(token.value_base_detail__sign_extended());
            continue;
          }
          ret_error_message =
              callbacks.AppendI64(token.value_base_detail__sign_extended());
          goto parsed_a_value;
        }

        case WUFFS_BASE__TOKEN__VBC__INLINE_INTEGER_UNSIGNED: {
          if (token.continued()) {
            extension_category =
                WUFFS_BASE__TOKEN__VBC__INLINE_INTEGER_UNSIGNED;
            extension_detail = vbd;
            continue;
          }
          ret_error_message = callbacks.AppendU64(vbd);
          goto parsed_a_value;
        }
      }

      if (token.value_major() == WUFFS_CBOR__TOKEN_VALUE_MAJOR) {
        uint64_t value_minor = token.value_minor();
        if (value_minor & WUFFS_CBOR__TOKEN_VALUE_MINOR__MINUS_1_MINUS_X) {
          if (token_len == 9) {
            ret_error_message = callbacks.AppendMinus1MinusX(
                wuffs_base__peek_u64be__no_bounds_check(token_ptr + 1));
            goto parsed_a_value;
          }
        } else if (value_minor & WUFFS_CBOR__TOKEN_VALUE_MINOR__SIMPLE_VALUE) {
          ret_error_message =
              callbacks.AppendCborSimpleValue(static_cast<uint8_t>(
                  value_minor & WUFFS_CBOR__TOKEN_VALUE_MINOR__DETAIL_MASK));
          goto parsed_a_value;
        } else if (value_minor & WUFFS_CBOR__TOKEN_VALUE_MINOR__TAG) {
          if (token.continued()) {
            extension_category = EXT_CAT__CBOR_TAG;
            extension_detail =
                value_minor & WUFFS_CBOR__TOKEN_VALUE_MINOR__DETAIL_MASK;
            continue;
          }
          ret_error_message = callbacks.AppendCborTag(
              value_minor & WUFFS_CBOR__TOKEN_VALUE_MINOR__DETAIL_MASK);
          if (!ret_error_message.empty()) {
            goto done;
          }
          continue;
        }
      }

    fail:
      ret_error_message =
          "wuffs_aux::DecodeCbor: internal error: unexpected token";
      goto done;

    parsed_a_value:
      if (!ret_error_message.empty() || (depth == 0)) {
        goto done;
      }
    }
  } while (false);

done:
  DecodeCborResult result(
      std::move(ret_error_message),
      wuffs_base__u64__sat_add(io_buf->meta.pos, cursor_index));
  callbacks.Done(result, input, *io_buf);
  return result;
}

}  // namespace wuffs_aux

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__AUX__CBOR)

// ---------------- Auxiliary - Image

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__AUX__IMAGE)

#include <utility>

namespace wuffs_aux {

DecodeImageResult::DecodeImageResult(MemOwner&& pixbuf_mem_owner0,
                                     wuffs_base__pixel_buffer pixbuf0,
                                     std::string&& error_message0)
    : pixbuf_mem_owner(std::move(pixbuf_mem_owner0)),
      pixbuf(pixbuf0),
      error_message(std::move(error_message0)) {}

DecodeImageResult::DecodeImageResult(std::string&& error_message0)
    : pixbuf_mem_owner(nullptr, &free),
      pixbuf(wuffs_base__null_pixel_buffer()),
      error_message(std::move(error_message0)) {}

DecodeImageCallbacks::~DecodeImageCallbacks() {}

DecodeImageCallbacks::AllocPixbufResult::AllocPixbufResult(
    MemOwner&& mem_owner0,
    wuffs_base__pixel_buffer pixbuf0)
    : mem_owner(std::move(mem_owner0)), pixbuf(pixbuf0), error_message("") {}

DecodeImageCallbacks::AllocPixbufResult::AllocPixbufResult(
    std::string&& error_message0)
    : mem_owner(nullptr, &free),
      pixbuf(wuffs_base__null_pixel_buffer()),
      error_message(std::move(error_message0)) {}

DecodeImageCallbacks::AllocWorkbufResult::AllocWorkbufResult(
    MemOwner&& mem_owner0,
    wuffs_base__slice_u8 workbuf0)
    : mem_owner(std::move(mem_owner0)), workbuf(workbuf0), error_message("") {}

DecodeImageCallbacks::AllocWorkbufResult::AllocWorkbufResult(
    std::string&& error_message0)
    : mem_owner(nullptr, &free),
      workbuf(wuffs_base__empty_slice_u8()),
      error_message(std::move(error_message0)) {}

wuffs_base__image_decoder::unique_ptr  //
DecodeImageCallbacks::SelectDecoder(uint32_t fourcc,
                                    wuffs_base__slice_u8 prefix_data,
                                    bool prefix_closed) {
  switch (fourcc) {
#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BMP)
    case WUFFS_BASE__FOURCC__BMP:
      return wuffs_bmp__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ETC2)
    case WUFFS_BASE__FOURCC__ETC2:
      return wuffs_etc2__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GIF)
    case WUFFS_BASE__FOURCC__GIF:
      return wuffs_gif__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JPEG)
    case WUFFS_BASE__FOURCC__JPEG:
      return wuffs_jpeg__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NIE)
    case WUFFS_BASE__FOURCC__NIE:
      return wuffs_nie__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NETPBM)
    case WUFFS_BASE__FOURCC__NPBM:
      return wuffs_netpbm__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__PNG)
    case WUFFS_BASE__FOURCC__PNG: {
      auto dec = wuffs_png__decoder::alloc_as__wuffs_base__image_decoder();
      // Favor faster decodes over rejecting invalid checksums.
      dec->set_quirk(WUFFS_BASE__QUIRK_IGNORE_CHECKSUM, 1);
      return dec;
    }
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__QOI)
    case WUFFS_BASE__FOURCC__QOI:
      return wuffs_qoi__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__TARGA)
    case WUFFS_BASE__FOURCC__TGA:
      return wuffs_targa__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__THUMBHASH)
    case WUFFS_BASE__FOURCC__TH:
      return wuffs_thumbhash__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WBMP)
    case WUFFS_BASE__FOURCC__WBMP:
      return wuffs_wbmp__decoder::alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WEBP)
    case WUFFS_BASE__FOURCC__WEBP:
      return wuffs_webp__decoder::alloc_as__wuffs_base__image_decoder();
#endif
  }

  return wuffs_base__image_decoder::unique_ptr(nullptr);
}

std::string  //
DecodeImageCallbacks::HandleMetadata(const wuffs_base__more_information& minfo,
                                     wuffs_base__slice_u8 raw) {
  return "";
}

wuffs_base__pixel_format  //
DecodeImageCallbacks::SelectPixfmt(
    const wuffs_base__image_config& image_config) {
  return wuffs_base__make_pixel_format(WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL);
}

DecodeImageCallbacks::AllocPixbufResult  //
DecodeImageCallbacks::AllocPixbuf(const wuffs_base__image_config& image_config,
                                  bool allow_uninitialized_memory) {
  uint32_t w = image_config.pixcfg.width();
  uint32_t h = image_config.pixcfg.height();
  if ((w == 0) || (h == 0)) {
    return AllocPixbufResult("");
  }
  uint64_t len = image_config.pixcfg.pixbuf_len();
  if ((len == 0) || (SIZE_MAX < len)) {
    return AllocPixbufResult(DecodeImage_UnsupportedPixelConfiguration);
  }
  void* ptr =
      allow_uninitialized_memory ? malloc((size_t)len) : calloc(1, (size_t)len);
  if (!ptr) {
    return AllocPixbufResult(DecodeImage_OutOfMemory);
  }
  wuffs_base__pixel_buffer pixbuf;
  wuffs_base__status status = pixbuf.set_from_slice(
      &image_config.pixcfg,
      wuffs_base__make_slice_u8((uint8_t*)ptr, (size_t)len));
  if (!status.is_ok()) {
    free(ptr);
    return AllocPixbufResult(status.message());
  }
  return AllocPixbufResult(MemOwner(ptr, &free), pixbuf);
}

DecodeImageCallbacks::AllocWorkbufResult  //
DecodeImageCallbacks::AllocWorkbuf(wuffs_base__range_ii_u64 len_range,
                                   bool allow_uninitialized_memory) {
  uint64_t len = len_range.max_incl;
  if (len == 0) {
    return AllocWorkbufResult("");
  } else if (SIZE_MAX < len) {
    return AllocWorkbufResult(DecodeImage_OutOfMemory);
  }
  void* ptr =
      allow_uninitialized_memory ? malloc((size_t)len) : calloc(1, (size_t)len);
  if (!ptr) {
    return AllocWorkbufResult(DecodeImage_OutOfMemory);
  }
  return AllocWorkbufResult(
      MemOwner(ptr, &free),
      wuffs_base__make_slice_u8((uint8_t*)ptr, (size_t)len));
}

void  //
DecodeImageCallbacks::Done(
    DecodeImageResult& result,
    sync_io::Input& input,
    IOBuffer& buffer,
    wuffs_base__image_decoder::unique_ptr image_decoder) {}

const char DecodeImage_BufferIsTooShort[] =  //
    "wuffs_aux::DecodeImage: buffer is too short";
const char DecodeImage_MaxInclDimensionExceeded[] =  //
    "wuffs_aux::DecodeImage: max_incl_dimension exceeded";
const char DecodeImage_MaxInclMetadataLengthExceeded[] =  //
    "wuffs_aux::DecodeImage: max_incl_metadata_length exceeded";
const char DecodeImage_OutOfMemory[] =  //
    "wuffs_aux::DecodeImage: out of memory";
const char DecodeImage_UnexpectedEndOfFile[] =  //
    "wuffs_aux::DecodeImage: unexpected end of file";
const char DecodeImage_UnsupportedImageFormat[] =  //
    "wuffs_aux::DecodeImage: unsupported image format";
const char DecodeImage_UnsupportedMetadata[] =  //
    "wuffs_aux::DecodeImage: unsupported metadata";
const char DecodeImage_UnsupportedPixelBlend[] =  //
    "wuffs_aux::DecodeImage: unsupported pixel blend";
const char DecodeImage_UnsupportedPixelConfiguration[] =  //
    "wuffs_aux::DecodeImage: unsupported pixel configuration";
const char DecodeImage_UnsupportedPixelFormat[] =  //
    "wuffs_aux::DecodeImage: unsupported pixel format";

DecodeImageArgQuirks::DecodeImageArgQuirks(const QuirkKeyValuePair* ptr0,
                                           const size_t len0)
    : ptr(ptr0), len(len0) {}

DecodeImageArgQuirks  //
DecodeImageArgQuirks::DefaultValue() {
  return DecodeImageArgQuirks(nullptr, 0);
}

DecodeImageArgFlags::DecodeImageArgFlags(uint64_t repr0) : repr(repr0) {}

DecodeImageArgFlags  //
DecodeImageArgFlags::DefaultValue() {
  return DecodeImageArgFlags(0);
}

DecodeImageArgPixelBlend::DecodeImageArgPixelBlend(
    wuffs_base__pixel_blend repr0)
    : repr(repr0) {}

DecodeImageArgPixelBlend  //
DecodeImageArgPixelBlend::DefaultValue() {
  return DecodeImageArgPixelBlend(WUFFS_BASE__PIXEL_BLEND__SRC);
}

DecodeImageArgBackgroundColor::DecodeImageArgBackgroundColor(
    wuffs_base__color_u32_argb_premul repr0)
    : repr(repr0) {}

DecodeImageArgBackgroundColor  //
DecodeImageArgBackgroundColor::DefaultValue() {
  return DecodeImageArgBackgroundColor(1);
}

DecodeImageArgMaxInclDimension::DecodeImageArgMaxInclDimension(uint32_t repr0)
    : repr(repr0) {}

DecodeImageArgMaxInclDimension  //
DecodeImageArgMaxInclDimension::DefaultValue() {
  return DecodeImageArgMaxInclDimension(1048575);
}

DecodeImageArgMaxInclMetadataLength::DecodeImageArgMaxInclMetadataLength(
    uint64_t repr0)
    : repr(repr0) {}

DecodeImageArgMaxInclMetadataLength  //
DecodeImageArgMaxInclMetadataLength::DefaultValue() {
  return DecodeImageArgMaxInclMetadataLength(16777215);
}

// --------

namespace {

const private_impl::ErrorMessages DecodeImageErrorMessages = {
    DecodeImage_MaxInclMetadataLengthExceeded,  //
    DecodeImage_OutOfMemory,                    //
    DecodeImage_UnexpectedEndOfFile,            //
    DecodeImage_UnsupportedMetadata,            //
    DecodeImage_UnsupportedImageFormat,         //
};

std::string  //
DecodeImageAdvanceIOBufferTo(sync_io::Input& input,
                             wuffs_base__io_buffer& io_buf,
                             uint64_t absolute_position) {
  return private_impl::AdvanceIOBufferTo(DecodeImageErrorMessages, input,
                                         io_buf, absolute_position);
}

wuffs_base__status  //
DIHM0(void* self,
      wuffs_base__io_buffer* a_dst,
      wuffs_base__more_information* a_minfo,
      wuffs_base__io_buffer* a_src) {
  return wuffs_base__image_decoder__tell_me_more(
      static_cast<wuffs_base__image_decoder*>(self), a_dst, a_minfo, a_src);
}

std::string  //
DIHM1(void* self,
      const wuffs_base__more_information* minfo,
      wuffs_base__slice_u8 raw) {
  return static_cast<DecodeImageCallbacks*>(self)->HandleMetadata(*minfo, raw);
}

std::string  //
DecodeImageHandleMetadata(wuffs_base__image_decoder::unique_ptr& image_decoder,
                          DecodeImageCallbacks& callbacks,
                          sync_io::Input& input,
                          wuffs_base__io_buffer& io_buf,
                          sync_io::DynIOBuffer& raw_metadata_buf) {
  return private_impl::HandleMetadata(DecodeImageErrorMessages, input, io_buf,
                                      raw_metadata_buf, DIHM0,
                                      static_cast<void*>(image_decoder.get()),
                                      DIHM1, static_cast<void*>(&callbacks));
}

DecodeImageResult  //
DecodeImage0(wuffs_base__image_decoder::unique_ptr& image_decoder,
             DecodeImageCallbacks& callbacks,
             sync_io::Input& input,
             wuffs_base__io_buffer& io_buf,
             const QuirkKeyValuePair* quirks_ptr,
             const size_t quirks_len,
             uint64_t flags,
             wuffs_base__pixel_blend pixel_blend,
             wuffs_base__color_u32_argb_premul background_color,
             uint32_t max_incl_dimension,
             uint64_t max_incl_metadata_length) {
  // Check args.
  switch (pixel_blend) {
    case WUFFS_BASE__PIXEL_BLEND__SRC:
    case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
      break;
    default:
      return DecodeImageResult(DecodeImage_UnsupportedPixelBlend);
  }

  wuffs_base__image_config image_config = wuffs_base__null_image_config();
  sync_io::DynIOBuffer raw_metadata_buf(max_incl_metadata_length);
  uint64_t start_pos = io_buf.reader_position();
  bool interested_in_metadata_after_the_frame = false;
  bool redirected = false;
  int32_t fourcc = 0;
redirect:
  do {
    // Determine the image format.
    if (!redirected) {
      while (true) {
        fourcc = wuffs_base__magic_number_guess_fourcc(io_buf.reader_slice(),
                                                       io_buf.meta.closed);
        if (fourcc > 0) {
          break;
        } else if ((fourcc == 0) && (io_buf.reader_length() >= 64)) {
          // Having (fourcc == 0) means that Wuffs' built in MIME sniffer
          // didn't recognize the image format. Nonetheless, custom callbacks
          // may still be able to do their own MIME sniffing, for exotic image
          // types. We try to give them at least 64 bytes of prefix data when
          // one-shot-calling callbacks.SelectDecoder. There is no mechanism
          // for the callbacks to request a longer prefix.
          break;
        } else if (io_buf.meta.closed || (io_buf.writer_length() == 0)) {
          fourcc = 0;
          break;
        }
        std::string error_message = input.CopyIn(&io_buf);
        if (!error_message.empty()) {
          return DecodeImageResult(std::move(error_message));
        }
      }
    } else {
      wuffs_base__io_buffer empty = wuffs_base__empty_io_buffer();
      wuffs_base__more_information minfo = wuffs_base__empty_more_information();
      wuffs_base__status tmm_status =
          image_decoder->tell_me_more(&empty, &minfo, &io_buf);
      if (tmm_status.repr != nullptr) {
        return DecodeImageResult(tmm_status.message());
      }
      if (minfo.flavor != WUFFS_BASE__MORE_INFORMATION__FLAVOR__IO_REDIRECT) {
        return DecodeImageResult(DecodeImage_UnsupportedImageFormat);
      }
      uint64_t pos = minfo.io_redirect__range().min_incl;
      if (pos <= start_pos) {
        // Redirects must go forward.
        return DecodeImageResult(DecodeImage_UnsupportedImageFormat);
      }
      std::string error_message =
          DecodeImageAdvanceIOBufferTo(input, io_buf, pos);
      if (!error_message.empty()) {
        return DecodeImageResult(std::move(error_message));
      }
      fourcc = (int32_t)(minfo.io_redirect__fourcc());
      if (fourcc == 0) {
        return DecodeImageResult(DecodeImage_UnsupportedImageFormat);
      }
      image_decoder.reset();
    }

    // Select the image decoder.
    image_decoder = callbacks.SelectDecoder(
        (uint32_t)fourcc, io_buf.reader_slice(), io_buf.meta.closed);
    if (!image_decoder) {
      return DecodeImageResult(DecodeImage_UnsupportedImageFormat);
    }

    // Apply quirks.
    for (size_t i = 0; i < quirks_len; i++) {
      image_decoder->set_quirk(quirks_ptr[i].first, quirks_ptr[i].second);
    }

    // Apply flags.
    if (flags != 0) {
      if (flags & DecodeImageArgFlags::REPORT_METADATA_CHRM) {
        image_decoder->set_report_metadata(WUFFS_BASE__FOURCC__CHRM, true);
      }
      if (flags & DecodeImageArgFlags::REPORT_METADATA_EXIF) {
        interested_in_metadata_after_the_frame = true;
        image_decoder->set_report_metadata(WUFFS_BASE__FOURCC__EXIF, true);
      }
      if (flags & DecodeImageArgFlags::REPORT_METADATA_GAMA) {
        image_decoder->set_report_metadata(WUFFS_BASE__FOURCC__GAMA, true);
      }
      if (flags & DecodeImageArgFlags::REPORT_METADATA_ICCP) {
        image_decoder->set_report_metadata(WUFFS_BASE__FOURCC__ICCP, true);
      }
      if (flags & DecodeImageArgFlags::REPORT_METADATA_KVP) {
        interested_in_metadata_after_the_frame = true;
        image_decoder->set_report_metadata(WUFFS_BASE__FOURCC__KVP, true);
      }
      if (flags & DecodeImageArgFlags::REPORT_METADATA_SRGB) {
        image_decoder->set_report_metadata(WUFFS_BASE__FOURCC__SRGB, true);
      }
      if (flags & DecodeImageArgFlags::REPORT_METADATA_XMP) {
        interested_in_metadata_after_the_frame = true;
        image_decoder->set_report_metadata(WUFFS_BASE__FOURCC__XMP, true);
      }
    }

    // Decode the image config.
    while (true) {
      wuffs_base__status id_dic_status =
          image_decoder->decode_image_config(&image_config, &io_buf);
      if (id_dic_status.repr == nullptr) {
        break;
      } else if (id_dic_status.repr == wuffs_base__note__i_o_redirect) {
        if (redirected) {
          return DecodeImageResult(DecodeImage_UnsupportedImageFormat);
        }
        redirected = true;
        goto redirect;
      } else if (id_dic_status.repr == wuffs_base__note__metadata_reported) {
        std::string error_message = DecodeImageHandleMetadata(
            image_decoder, callbacks, input, io_buf, raw_metadata_buf);
        if (!error_message.empty()) {
          return DecodeImageResult(std::move(error_message));
        }
      } else if (id_dic_status.repr != wuffs_base__suspension__short_read) {
        return DecodeImageResult(id_dic_status.message());
      } else if (io_buf.meta.closed) {
        return DecodeImageResult(DecodeImage_UnexpectedEndOfFile);
      } else {
        std::string error_message = input.CopyIn(&io_buf);
        if (!error_message.empty()) {
          return DecodeImageResult(std::move(error_message));
        }
      }
    }
  } while (false);
  if (!interested_in_metadata_after_the_frame) {
    raw_metadata_buf.drop();
  }

  // Select the pixel format.
  uint32_t w = image_config.pixcfg.width();
  uint32_t h = image_config.pixcfg.height();
  if ((w > max_incl_dimension) || (h > max_incl_dimension)) {
    return DecodeImageResult(DecodeImage_MaxInclDimensionExceeded);
  }
  wuffs_base__pixel_format pixel_format = callbacks.SelectPixfmt(image_config);
  if (pixel_format.repr != image_config.pixcfg.pixel_format().repr) {
    switch (pixel_format.repr) {
      case WUFFS_BASE__PIXEL_FORMAT__Y:
      case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
      case WUFFS_BASE__PIXEL_FORMAT__BGR:
      case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
      case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL_4X16LE:
      case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
      case WUFFS_BASE__PIXEL_FORMAT__RGB:
      case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
      case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
        break;
      default:
        return DecodeImageResult(DecodeImage_UnsupportedPixelFormat);
    }
    image_config.pixcfg.set(pixel_format.repr,
                            WUFFS_BASE__PIXEL_SUBSAMPLING__NONE, w, h);
  }

  // Allocate the pixel buffer.
  bool valid_background_color =
      wuffs_base__color_u32_argb_premul__is_valid(background_color);
  DecodeImageCallbacks::AllocPixbufResult alloc_pixbuf_result =
      callbacks.AllocPixbuf(image_config, valid_background_color);
  if (!alloc_pixbuf_result.error_message.empty()) {
    return DecodeImageResult(std::move(alloc_pixbuf_result.error_message));
  }
  wuffs_base__pixel_buffer pixel_buffer = alloc_pixbuf_result.pixbuf;
  if (valid_background_color) {
    wuffs_base__status pb_scufr_status = pixel_buffer.set_color_u32_fill_rect(
        pixel_buffer.pixcfg.bounds(), background_color);
    if (pb_scufr_status.repr != nullptr) {
      return DecodeImageResult(pb_scufr_status.message());
    }
  }

  // Allocate the work buffer. Wuffs' decoders conventionally assume that this
  // can be uninitialized memory.
  wuffs_base__range_ii_u64 workbuf_len = image_decoder->workbuf_len();
  DecodeImageCallbacks::AllocWorkbufResult alloc_workbuf_result =
      callbacks.AllocWorkbuf(workbuf_len, true);
  if (!alloc_workbuf_result.error_message.empty()) {
    return DecodeImageResult(std::move(alloc_workbuf_result.error_message));
  } else if (alloc_workbuf_result.workbuf.len < workbuf_len.min_incl) {
    return DecodeImageResult(DecodeImage_BufferIsTooShort);
  }

  // Decode the frame config.
  wuffs_base__frame_config frame_config = wuffs_base__null_frame_config();
  while (true) {
    wuffs_base__status id_dfc_status =
        image_decoder->decode_frame_config(&frame_config, &io_buf);
    if (id_dfc_status.repr == nullptr) {
      break;
    } else if (id_dfc_status.repr == wuffs_base__note__metadata_reported) {
      std::string error_message = DecodeImageHandleMetadata(
          image_decoder, callbacks, input, io_buf, raw_metadata_buf);
      if (!error_message.empty()) {
        return DecodeImageResult(std::move(error_message));
      }
    } else if (id_dfc_status.repr != wuffs_base__suspension__short_read) {
      return DecodeImageResult(id_dfc_status.message());
    } else if (io_buf.meta.closed) {
      return DecodeImageResult(DecodeImage_UnexpectedEndOfFile);
    } else {
      std::string error_message = input.CopyIn(&io_buf);
      if (!error_message.empty()) {
        return DecodeImageResult(std::move(error_message));
      }
    }
  }

  // Decode the frame (the pixels).
  //
  // From here on, always returns the pixel_buffer. If we get this far, we can
  // still display a partial image, even if we encounter an error.
  std::string message("");
  if ((pixel_blend == WUFFS_BASE__PIXEL_BLEND__SRC_OVER) &&
      frame_config.overwrite_instead_of_blend()) {
    pixel_blend = WUFFS_BASE__PIXEL_BLEND__SRC;
  }
  while (true) {
    wuffs_base__status id_df_status =
        image_decoder->decode_frame(&pixel_buffer, &io_buf, pixel_blend,
                                    alloc_workbuf_result.workbuf, nullptr);
    if (id_df_status.repr == nullptr) {
      break;
    } else if (id_df_status.repr != wuffs_base__suspension__short_read) {
      message = id_df_status.message();
      break;
    } else if (io_buf.meta.closed) {
      message = DecodeImage_UnexpectedEndOfFile;
      break;
    } else {
      std::string error_message = input.CopyIn(&io_buf);
      if (!error_message.empty()) {
        message = std::move(error_message);
        break;
      }
    }
  }

  // Decode any metadata after the frame.
  if (interested_in_metadata_after_the_frame) {
    while (true) {
      wuffs_base__status id_dfc_status =
          image_decoder->decode_frame_config(NULL, &io_buf);
      if (id_dfc_status.repr == wuffs_base__note__end_of_data) {
        break;
      } else if (id_dfc_status.repr == nullptr) {
        continue;
      } else if (id_dfc_status.repr == wuffs_base__note__metadata_reported) {
        std::string error_message = DecodeImageHandleMetadata(
            image_decoder, callbacks, input, io_buf, raw_metadata_buf);
        if (!error_message.empty()) {
          return DecodeImageResult(std::move(error_message));
        }
      } else if (id_dfc_status.repr != wuffs_base__suspension__short_read) {
        return DecodeImageResult(id_dfc_status.message());
      } else if (io_buf.meta.closed) {
        return DecodeImageResult(DecodeImage_UnexpectedEndOfFile);
      } else {
        std::string error_message = input.CopyIn(&io_buf);
        if (!error_message.empty()) {
          return DecodeImageResult(std::move(error_message));
        }
      }
    }
  }

  return DecodeImageResult(std::move(alloc_pixbuf_result.mem_owner),
                           pixel_buffer, std::move(message));
}

}  // namespace

DecodeImageResult  //
DecodeImage(DecodeImageCallbacks& callbacks,
            sync_io::Input& input,
            DecodeImageArgQuirks quirks,
            DecodeImageArgFlags flags,
            DecodeImageArgPixelBlend pixel_blend,
            DecodeImageArgBackgroundColor background_color,
            DecodeImageArgMaxInclDimension max_incl_dimension,
            DecodeImageArgMaxInclMetadataLength max_incl_metadata_length) {
  wuffs_base__io_buffer* io_buf = input.BringsItsOwnIOBuffer();
  wuffs_base__io_buffer fallback_io_buf = wuffs_base__empty_io_buffer();
  std::unique_ptr<uint8_t[]> fallback_io_array(nullptr);
  if (!io_buf) {
    fallback_io_array = std::unique_ptr<uint8_t[]>(new uint8_t[32768]);
    fallback_io_buf =
        wuffs_base__ptr_u8__writer(fallback_io_array.get(), 32768);
    io_buf = &fallback_io_buf;
  }

  wuffs_base__image_decoder::unique_ptr image_decoder(nullptr);
  DecodeImageResult result = DecodeImage0(
      image_decoder, callbacks, input, *io_buf, quirks.ptr, quirks.len,
      flags.repr, pixel_blend.repr, background_color.repr,
      max_incl_dimension.repr, max_incl_metadata_length.repr);
  callbacks.Done(result, input, *io_buf, std::move(image_decoder));
  return result;
}

}  // namespace wuffs_aux

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__AUX__IMAGE)

// ---------------- Auxiliary - JSON

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__AUX__JSON)

#include <utility>

namespace wuffs_aux {

DecodeJsonResult::DecodeJsonResult(std::string&& error_message0,
                                   uint64_t cursor_position0)
    : error_message(std::move(error_message0)),
      cursor_position(cursor_position0) {}

DecodeJsonCallbacks::~DecodeJsonCallbacks() {}

void  //
DecodeJsonCallbacks::Done(DecodeJsonResult& result,
                          sync_io::Input& input,
                          IOBuffer& buffer) {}

const char DecodeJson_BadJsonPointer[] =  //
    "wuffs_aux::DecodeJson: bad JSON Pointer";
const char DecodeJson_NoMatch[] =  //
    "wuffs_aux::DecodeJson: no match";

DecodeJsonArgQuirks::DecodeJsonArgQuirks(const QuirkKeyValuePair* ptr0,
                                         const size_t len0)
    : ptr(ptr0), len(len0) {}

DecodeJsonArgQuirks  //
DecodeJsonArgQuirks::DefaultValue() {
  return DecodeJsonArgQuirks(nullptr, 0);
}

DecodeJsonArgJsonPointer::DecodeJsonArgJsonPointer(std::string repr0)
    : repr(repr0) {}

DecodeJsonArgJsonPointer  //
DecodeJsonArgJsonPointer::DefaultValue() {
  return DecodeJsonArgJsonPointer(std::string());
}

// --------

#define WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN                          \
  while (tok_buf.meta.ri >= tok_buf.meta.wi) {                              \
    if (tok_status.repr == nullptr) {                                       \
      goto done;                                                            \
    } else if (tok_status.repr == wuffs_base__suspension__short_write) {    \
      tok_buf.compact();                                                    \
    } else if (tok_status.repr == wuffs_base__suspension__short_read) {     \
      if (!io_error_message.empty()) {                                      \
        ret_error_message = std::move(io_error_message);                    \
        goto done;                                                          \
      } else if (cursor_index != io_buf->meta.ri) {                         \
        ret_error_message =                                                 \
            "wuffs_aux::DecodeJson: internal error: bad cursor_index";      \
        goto done;                                                          \
      } else if (io_buf->meta.closed) {                                     \
        ret_error_message =                                                 \
            "wuffs_aux::DecodeJson: internal error: io_buf is closed";      \
        goto done;                                                          \
      }                                                                     \
      io_buf->compact();                                                    \
      if (io_buf->meta.wi >= io_buf->data.len) {                            \
        ret_error_message =                                                 \
            "wuffs_aux::DecodeJson: internal error: io_buf is full";        \
        goto done;                                                          \
      }                                                                     \
      cursor_index = io_buf->meta.ri;                                       \
      io_error_message = input.CopyIn(io_buf);                              \
    } else {                                                                \
      ret_error_message = tok_status.message();                             \
      goto done;                                                            \
    }                                                                       \
    tok_status =                                                            \
        dec->decode_tokens(&tok_buf, io_buf, wuffs_base__empty_slice_u8()); \
    if ((tok_buf.meta.ri > tok_buf.meta.wi) ||                              \
        (tok_buf.meta.wi > tok_buf.data.len) ||                             \
        (io_buf->meta.ri > io_buf->meta.wi) ||                              \
        (io_buf->meta.wi > io_buf->data.len)) {                             \
      ret_error_message =                                                   \
          "wuffs_aux::DecodeJson: internal error: bad buffer indexes";      \
      goto done;                                                            \
    }                                                                       \
  }                                                                         \
  wuffs_base__token token = tok_buf.data.ptr[tok_buf.meta.ri++];            \
  uint64_t token_len = token.length();                                      \
  if ((io_buf->meta.ri < cursor_index) ||                                   \
      ((io_buf->meta.ri - cursor_index) < token_len)) {                     \
    ret_error_message =                                                     \
        "wuffs_aux::DecodeJson: internal error: bad token indexes";         \
    goto done;                                                              \
  }                                                                         \
  uint8_t* token_ptr = io_buf->data.ptr + cursor_index;                     \
  (void)(token_ptr);                                                        \
  cursor_index += static_cast<size_t>(token_len)

// --------

namespace {

// DecodeJson_SplitJsonPointer returns ("bar", 8) for ("/foo/bar/b~1z/qux", 5,
// etc). It returns a 0 size_t when s has invalid JSON Pointer syntax or i is
// out of bounds.
//
// The string returned is unescaped. If calling it again, this time with i=8,
// the "b~1z" substring would be returned as "b/z".
std::pair<std::string, size_t>  //
DecodeJson_SplitJsonPointer(std::string& s,
                            size_t i,
                            bool allow_tilde_n_tilde_r_tilde_t) {
  std::string fragment;
  if (i > s.size()) {
    return std::make_pair(std::string(), 0);
  }
  while (i < s.size()) {
    char c = s[i];
    if (c == '/') {
      break;
    } else if (c != '~') {
      fragment.push_back(c);
      i++;
      continue;
    }
    i++;
    if (i >= s.size()) {
      return std::make_pair(std::string(), 0);
    }
    c = s[i];
    if (c == '0') {
      fragment.push_back('~');
      i++;
      continue;
    } else if (c == '1') {
      fragment.push_back('/');
      i++;
      continue;
    } else if (allow_tilde_n_tilde_r_tilde_t) {
      if (c == 'n') {
        fragment.push_back('\n');
        i++;
        continue;
      } else if (c == 'r') {
        fragment.push_back('\r');
        i++;
        continue;
      } else if (c == 't') {
        fragment.push_back('\t');
        i++;
        continue;
      }
    }
    return std::make_pair(std::string(), 0);
  }
  return std::make_pair(std::move(fragment), i);
}

// --------

std::string  //
DecodeJson_WalkJsonPointerFragment(wuffs_base__token_buffer& tok_buf,
                                   wuffs_base__status& tok_status,
                                   wuffs_json__decoder::unique_ptr& dec,
                                   wuffs_base__io_buffer* io_buf,
                                   std::string& io_error_message,
                                   size_t& cursor_index,
                                   sync_io::Input& input,
                                   std::string& json_pointer_fragment) {
  std::string ret_error_message;
  while (true) {
    WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN;

    int64_t vbc = token.value_base_category();
    uint64_t vbd = token.value_base_detail();
    if (vbc == WUFFS_BASE__TOKEN__VBC__FILLER) {
      continue;
    } else if ((vbc != WUFFS_BASE__TOKEN__VBC__STRUCTURE) ||
               !(vbd & WUFFS_BASE__TOKEN__VBD__STRUCTURE__PUSH)) {
      return DecodeJson_NoMatch;
    } else if (vbd & WUFFS_BASE__TOKEN__VBD__STRUCTURE__TO_LIST) {
      goto do_list;
    }
    goto do_dict;
  }

do_dict:
  // Alternate between these two things:
  //  1. Decode the next dict key (a string). If it matches the fragment, we're
  //    done (success). If we've reached the dict's end (VBD__STRUCTURE__POP)
  //    so that there was no next dict key, we're done (failure).
  //  2. Otherwise, skip the next dict value.
  while (true) {
    for (std::string str; true;) {
      WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN;

      int64_t vbc = token.value_base_category();
      uint64_t vbd = token.value_base_detail();
      switch (vbc) {
        case WUFFS_BASE__TOKEN__VBC__FILLER:
          continue;

        case WUFFS_BASE__TOKEN__VBC__STRUCTURE:
          if (vbd & WUFFS_BASE__TOKEN__VBD__STRUCTURE__PUSH) {
            goto fail;
          }
          return DecodeJson_NoMatch;

        case WUFFS_BASE__TOKEN__VBC__STRING: {
          if (vbd & WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_0_DST_1_SRC_DROP) {
            // No-op.
          } else if (vbd &
                     WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_1_DST_1_SRC_COPY) {
            const char* ptr =  // Convert from (uint8_t*).
                static_cast<const char*>(static_cast<void*>(token_ptr));
            str.append(ptr, static_cast<size_t>(token_len));
          } else {
            goto fail;
          }
          break;
        }

        case WUFFS_BASE__TOKEN__VBC__UNICODE_CODE_POINT: {
          uint8_t u[WUFFS_BASE__UTF_8__BYTE_LENGTH__MAX_INCL];
          size_t n = wuffs_base__utf_8__encode(
              wuffs_base__make_slice_u8(
                  &u[0], WUFFS_BASE__UTF_8__BYTE_LENGTH__MAX_INCL),
              static_cast<uint32_t>(vbd));
          const char* ptr =  // Convert from (uint8_t*).
              static_cast<const char*>(static_cast<void*>(&u[0]));
          str.append(ptr, n);
          break;
        }

        default:
          goto fail;
      }

      if (token.continued()) {
        continue;
      }
      if (str == json_pointer_fragment) {
        return "";
      }
      goto skip_the_next_dict_value;
    }

  skip_the_next_dict_value:
    for (uint32_t skip_depth = 0; true;) {
      WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN;

      int64_t vbc = token.value_base_category();
      uint64_t vbd = token.value_base_detail();
      if (token.continued() || (vbc == WUFFS_BASE__TOKEN__VBC__FILLER)) {
        continue;
      } else if (vbc == WUFFS_BASE__TOKEN__VBC__STRUCTURE) {
        if (vbd & WUFFS_BASE__TOKEN__VBD__STRUCTURE__PUSH) {
          skip_depth++;
          continue;
        }
        skip_depth--;
      }

      if (skip_depth == 0) {
        break;
      }
    }  // skip_the_next_dict_value
  }    // do_dict

do_list:
  do {
    wuffs_base__result_u64 result_u64 = wuffs_base__parse_number_u64(
        wuffs_base__make_slice_u8(
            static_cast<uint8_t*>(static_cast<void*>(
                const_cast<char*>(json_pointer_fragment.data()))),
            json_pointer_fragment.size()),
        WUFFS_BASE__PARSE_NUMBER_XXX__DEFAULT_OPTIONS);
    if (!result_u64.status.is_ok()) {
      return DecodeJson_NoMatch;
    }
    uint64_t remaining = result_u64.value;
    if (remaining == 0) {
      goto check_that_a_value_follows;
    }
    for (uint32_t skip_depth = 0; true;) {
      WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN;

      int64_t vbc = token.value_base_category();
      uint64_t vbd = token.value_base_detail();
      if (token.continued() || (vbc == WUFFS_BASE__TOKEN__VBC__FILLER)) {
        continue;
      } else if (vbc == WUFFS_BASE__TOKEN__VBC__STRUCTURE) {
        if (vbd & WUFFS_BASE__TOKEN__VBD__STRUCTURE__PUSH) {
          skip_depth++;
          continue;
        }
        if (skip_depth == 0) {
          return DecodeJson_NoMatch;
        }
        skip_depth--;
      }

      if (skip_depth > 0) {
        continue;
      }
      remaining--;
      if (remaining == 0) {
        goto check_that_a_value_follows;
      }
    }
  } while (false);  // do_list

check_that_a_value_follows:
  while (true) {
    WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN;

    int64_t vbc = token.value_base_category();
    uint64_t vbd = token.value_base_detail();
    if (vbc == WUFFS_BASE__TOKEN__VBC__FILLER) {
      continue;
    }

    // Undo the last part of WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN, so
    // that we're only peeking at the next token.
    tok_buf.meta.ri--;
    cursor_index -= static_cast<size_t>(token_len);

    if ((vbc == WUFFS_BASE__TOKEN__VBC__STRUCTURE) &&
        (vbd & WUFFS_BASE__TOKEN__VBD__STRUCTURE__POP)) {
      return DecodeJson_NoMatch;
    }
    return "";
  }  // check_that_a_value_follows

fail:
  return "wuffs_aux::DecodeJson: internal error: unexpected token";
done:
  return ret_error_message;
}

}  // namespace

// --------

DecodeJsonResult  //
DecodeJson(DecodeJsonCallbacks& callbacks,
           sync_io::Input& input,
           DecodeJsonArgQuirks quirks,
           DecodeJsonArgJsonPointer json_pointer) {
  // Prepare the wuffs_base__io_buffer and the resultant error_message.
  wuffs_base__io_buffer* io_buf = input.BringsItsOwnIOBuffer();
  wuffs_base__io_buffer fallback_io_buf = wuffs_base__empty_io_buffer();
  std::unique_ptr<uint8_t[]> fallback_io_array(nullptr);
  if (!io_buf) {
    fallback_io_array = std::unique_ptr<uint8_t[]>(new uint8_t[4096]);
    fallback_io_buf = wuffs_base__ptr_u8__writer(fallback_io_array.get(), 4096);
    io_buf = &fallback_io_buf;
  }
  // cursor_index is discussed at
  // https://nigeltao.github.io/blog/2020/jsonptr.html#the-cursor-index
  size_t cursor_index = 0;
  std::string ret_error_message;
  std::string io_error_message;

  do {
    // Prepare the low-level JSON decoder.
    wuffs_json__decoder::unique_ptr dec = wuffs_json__decoder::alloc();
    if (!dec) {
      ret_error_message = "wuffs_aux::DecodeJson: out of memory";
      goto done;
    } else if (WUFFS_JSON__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE != 0) {
      ret_error_message =
          "wuffs_aux::DecodeJson: internal error: bad WORKBUF_LEN";
      goto done;
    }
    bool allow_tilde_n_tilde_r_tilde_t = false;
    for (size_t i = 0; i < quirks.len; i++) {
      dec->set_quirk(quirks.ptr[i].first, quirks.ptr[i].second);
      if (quirks.ptr[i].first ==
          WUFFS_JSON__QUIRK_JSON_POINTER_ALLOW_TILDE_N_TILDE_R_TILDE_T) {
        allow_tilde_n_tilde_r_tilde_t = (quirks.ptr[i].second != 0);
      }
    }

    // Prepare the wuffs_base__tok_buffer. 256 tokens is 2KiB.
    wuffs_base__token tok_array[256];
    wuffs_base__token_buffer tok_buf =
        wuffs_base__slice_token__writer(wuffs_base__make_slice_token(
            &tok_array[0], (sizeof(tok_array) / sizeof(tok_array[0]))));
    wuffs_base__status tok_status =
        dec->decode_tokens(&tok_buf, io_buf, wuffs_base__empty_slice_u8());

    // Prepare other state.
    int32_t depth = 0;
    std::string str;

    // Walk the (optional) JSON Pointer.
    for (size_t i = 0; i < json_pointer.repr.size();) {
      if (json_pointer.repr[i] != '/') {
        ret_error_message = DecodeJson_BadJsonPointer;
        goto done;
      }
      std::pair<std::string, size_t> split = DecodeJson_SplitJsonPointer(
          json_pointer.repr, i + 1, allow_tilde_n_tilde_r_tilde_t);
      i = split.second;
      if (i == 0) {
        ret_error_message = DecodeJson_BadJsonPointer;
        goto done;
      }
      ret_error_message = DecodeJson_WalkJsonPointerFragment(
          tok_buf, tok_status, dec, io_buf, io_error_message, cursor_index,
          input, split.first);
      if (!ret_error_message.empty()) {
        goto done;
      }
    }

    // Loop, doing these two things:
    //  1. Get the next token.
    //  2. Process that token.
    while (true) {
      WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN;

      int64_t vbc = token.value_base_category();
      uint64_t vbd = token.value_base_detail();
      switch (vbc) {
        case WUFFS_BASE__TOKEN__VBC__FILLER:
          continue;

        case WUFFS_BASE__TOKEN__VBC__STRUCTURE: {
          if (vbd & WUFFS_BASE__TOKEN__VBD__STRUCTURE__PUSH) {
            ret_error_message = callbacks.Push(static_cast<uint32_t>(vbd));
            if (!ret_error_message.empty()) {
              goto done;
            }
            depth++;
            if (depth > (int32_t)WUFFS_JSON__DECODER_DEPTH_MAX_INCL) {
              ret_error_message =
                  "wuffs_aux::DecodeJson: internal error: bad depth";
              goto done;
            }
            continue;
          }
          ret_error_message = callbacks.Pop(static_cast<uint32_t>(vbd));
          depth--;
          if (depth < 0) {
            ret_error_message =
                "wuffs_aux::DecodeJson: internal error: bad depth";
            goto done;
          }
          goto parsed_a_value;
        }

        case WUFFS_BASE__TOKEN__VBC__STRING: {
          if (vbd & WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_0_DST_1_SRC_DROP) {
            // No-op.
          } else if (vbd &
                     WUFFS_BASE__TOKEN__VBD__STRING__CONVERT_1_DST_1_SRC_COPY) {
            const char* ptr =  // Convert from (uint8_t*).
                static_cast<const char*>(static_cast<void*>(token_ptr));
            str.append(ptr, static_cast<size_t>(token_len));
          } else {
            goto fail;
          }
          if (token.continued()) {
            continue;
          }
          ret_error_message = callbacks.AppendTextString(std::move(str));
          str.clear();
          goto parsed_a_value;
        }

        case WUFFS_BASE__TOKEN__VBC__UNICODE_CODE_POINT: {
          uint8_t u[WUFFS_BASE__UTF_8__BYTE_LENGTH__MAX_INCL];
          size_t n = wuffs_base__utf_8__encode(
              wuffs_base__make_slice_u8(
                  &u[0], WUFFS_BASE__UTF_8__BYTE_LENGTH__MAX_INCL),
              static_cast<uint32_t>(vbd));
          const char* ptr =  // Convert from (uint8_t*).
              static_cast<const char*>(static_cast<void*>(&u[0]));
          str.append(ptr, n);
          if (token.continued()) {
            continue;
          }
          goto fail;
        }

        case WUFFS_BASE__TOKEN__VBC__LITERAL: {
          ret_error_message =
              (vbd & WUFFS_BASE__TOKEN__VBD__LITERAL__NULL)
                  ? callbacks.AppendNull()
                  : callbacks.AppendBool(vbd &
                                         WUFFS_BASE__TOKEN__VBD__LITERAL__TRUE);
          goto parsed_a_value;
        }

        case WUFFS_BASE__TOKEN__VBC__NUMBER: {
          if (vbd & WUFFS_BASE__TOKEN__VBD__NUMBER__FORMAT_TEXT) {
            if (vbd & WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_INTEGER_SIGNED) {
              wuffs_base__result_i64 r = wuffs_base__parse_number_i64(
                  wuffs_base__make_slice_u8(token_ptr,
                                            static_cast<size_t>(token_len)),
                  WUFFS_BASE__PARSE_NUMBER_XXX__DEFAULT_OPTIONS);
              if (r.status.is_ok()) {
                ret_error_message = callbacks.AppendI64(r.value);
                goto parsed_a_value;
              }
            }
            if (vbd & WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_FLOATING_POINT) {
              wuffs_base__result_f64 r = wuffs_base__parse_number_f64(
                  wuffs_base__make_slice_u8(token_ptr,
                                            static_cast<size_t>(token_len)),
                  WUFFS_BASE__PARSE_NUMBER_XXX__DEFAULT_OPTIONS);
              if (r.status.is_ok()) {
                ret_error_message = callbacks.AppendF64(r.value);
                goto parsed_a_value;
              }
            }
          } else if (vbd & WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_NEG_INF) {
            ret_error_message = callbacks.AppendF64(
                wuffs_base__ieee_754_bit_representation__from_u64_to_f64(
                    0xFFF0000000000000ul));
            goto parsed_a_value;
          } else if (vbd & WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_POS_INF) {
            ret_error_message = callbacks.AppendF64(
                wuffs_base__ieee_754_bit_representation__from_u64_to_f64(
                    0x7FF0000000000000ul));
            goto parsed_a_value;
          } else if (vbd & WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_NEG_NAN) {
            ret_error_message = callbacks.AppendF64(
                wuffs_base__ieee_754_bit_representation__from_u64_to_f64(
                    0xFFFFFFFFFFFFFFFFul));
            goto parsed_a_value;
          } else if (vbd & WUFFS_BASE__TOKEN__VBD__NUMBER__CONTENT_POS_NAN) {
            ret_error_message = callbacks.AppendF64(
                wuffs_base__ieee_754_bit_representation__from_u64_to_f64(
                    0x7FFFFFFFFFFFFFFFul));
            goto parsed_a_value;
          }
          goto fail;
        }
      }

    fail:
      ret_error_message =
          "wuffs_aux::DecodeJson: internal error: unexpected token";
      goto done;

    parsed_a_value:
      // If an error was encountered, we are done. Otherwise, (depth == 0)
      // after parsing a value is equivalent to having decoded the entire JSON
      // value (for an empty json_pointer query) or having decoded the
      // pointed-to JSON value (for a non-empty json_pointer query). In the
      // latter case, we are also done.
      //
      // However, if quirks like WUFFS_JSON__QUIRK_ALLOW_TRAILING_FILLER or
      // WUFFS_JSON__QUIRK_EXPECT_TRAILING_NEW_LINE_OR_EOF are passed, decoding
      // the entire JSON value should also consume any trailing filler, in case
      // the DecodeJson caller wants to subsequently check that the input is
      // completely exhausted (and otherwise raise "valid JSON followed by
      // further (unexpected) data"). We aren't done yet. Instead, keep the
      // loop running until WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN's
      // decode_tokens returns an ok status.
      if (!ret_error_message.empty() ||
          ((depth == 0) && !json_pointer.repr.empty())) {
        goto done;
      }
    }
  } while (false);

done:
  DecodeJsonResult result(
      std::move(ret_error_message),
      wuffs_base__u64__sat_add(io_buf->meta.pos, cursor_index));
  callbacks.Done(result, input, *io_buf);
  return result;
}

#undef WUFFS_AUX__DECODE_JSON__GET_THE_NEXT_TOKEN

}  // namespace wuffs_aux

#endif  // !defined(WUFFS_CONFIG__MODULES) ||
        // defined(WUFFS_CONFIG__MODULE__AUX__JSON)

#endif  // defined(__cplusplus) && defined(WUFFS_BASE__HAVE_UNIQUE_PTR)


// ---------------- Wuffs' reimplementation of the STB API.
//
// This is a drop-in replacement of that third-party library.
//
// Disabled by default, unless you #define the
// WUFFS_CONFIG__ENABLE_DROP_IN_REPLACEMENT__STB macro beforehand.
//
// For API docs, see https://github.com/nothings/stb

#if defined(WUFFS_CONFIG__ENABLE_DROP_IN_REPLACEMENT__STB)

#include <limits.h>
#include <stdlib.h>

#ifdef __cplusplus
extern "C" {
#endif

// --------

#if defined(__GNUC__)
__thread const char*  //
    wuffs_drop_in__stb__g_failure_reason = NULL;
#elif defined(_MSC_VER)
__declspec(thread) const char*  //
    wuffs_drop_in__stb__g_failure_reason = NULL;
#else
const char*  //
    wuffs_drop_in__stb__g_failure_reason = NULL;
#endif

// --------

static void                         //
wuffs_drop_in__stb__read(           //
    wuffs_base__io_buffer* srcbuf,  //
    stbi_io_callbacks const* clbk,  //
    void* user) {
  uint8_t* ptr = wuffs_base__io_buffer__writer_pointer(srcbuf);
  size_t len = wuffs_base__io_buffer__writer_length(srcbuf);
  if (len > INT_MAX) {
    len = INT_MAX;
  }
  int n = clbk->read(user, (char*)ptr, (int)len);
  if (n > 0) {
    srcbuf->meta.wi += (size_t)n;
  } else {
    srcbuf->meta.closed = clbk->eof(user);
  }
}

static wuffs_base__image_decoder*   //
wuffs_drop_in__stb__make_decoder(   //
    wuffs_base__io_buffer* srcbuf,  //
    stbi_io_callbacks const* clbk,  //
    void* user) {
  while (1) {
    int32_t fourcc = wuffs_base__magic_number_guess_fourcc(
        wuffs_base__io_buffer__reader_slice(srcbuf), srcbuf->meta.closed);
    if (fourcc < 0) {
      if (srcbuf->meta.closed || !clbk) {
        break;
      }
      wuffs_drop_in__stb__read(srcbuf, clbk, user);
      continue;
    }

    switch (fourcc) {
#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BMP)
      case WUFFS_BASE__FOURCC__BMP:
        return wuffs_bmp__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ETC2)
      case WUFFS_BASE__FOURCC__ETC2:
        return wuffs_etc2__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GIF)
      case WUFFS_BASE__FOURCC__GIF:
        return wuffs_gif__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__JPEG)
      case WUFFS_BASE__FOURCC__JPEG:
        return wuffs_jpeg__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NIE)
      case WUFFS_BASE__FOURCC__NIE:
        return wuffs_nie__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__NETPBM)
      case WUFFS_BASE__FOURCC__NPBM:
        return wuffs_netpbm__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__PNG)
      case WUFFS_BASE__FOURCC__PNG:
        return wuffs_png__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__QOI)
      case WUFFS_BASE__FOURCC__QOI:
        return wuffs_qoi__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__TARGA)
      case WUFFS_BASE__FOURCC__TGA:
        return wuffs_targa__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__THUMBHASH)
      case WUFFS_BASE__FOURCC__TH:
        return wuffs_thumbhash__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WBMP)
      case WUFFS_BASE__FOURCC__WBMP:
        return wuffs_wbmp__decoder__alloc_as__wuffs_base__image_decoder();
#endif

#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__WEBP)
      case WUFFS_BASE__FOURCC__WEBP:
        return wuffs_webp__decoder__alloc_as__wuffs_base__image_decoder();
#endif
    }

    wuffs_drop_in__stb__g_failure_reason = "unknown image type";
    break;
  }
  return NULL;
}

// --------

static void*                         //
wuffs_drop_in__stb__load1(           //
    wuffs_base__io_buffer* srcbuf,   //
    stbi_io_callbacks const* clbk,   //
    void* user,                      //
    wuffs_base__image_decoder* dec,  //
    wuffs_base__image_config* ic,    //
    uint32_t dst_pixfmt,             //
    int desired_channels,            //
    int info_only) {
  // Favor faster decodes over rejecting invalid checksums.
  wuffs_base__image_decoder__set_quirk(dec, WUFFS_BASE__QUIRK_IGNORE_CHECKSUM,
                                       1);

  while (1) {
    wuffs_base__status status =
        wuffs_base__image_decoder__decode_image_config(dec, ic, srcbuf);
    if (status.repr == NULL) {
      break;
    } else if ((status.repr != wuffs_base__suspension__short_read) || !clbk) {
      wuffs_drop_in__stb__g_failure_reason = status.repr;
      return NULL;
    }

    size_t wl = wuffs_base__io_buffer__writer_length(srcbuf);
    wuffs_base__io_buffer__compact(srcbuf);
    if (wl >= wuffs_base__io_buffer__writer_length(srcbuf)) {
      wuffs_drop_in__stb__g_failure_reason = "I/O buffer is too small";
      return NULL;
    }
    wuffs_drop_in__stb__read(srcbuf, clbk, user);
  }

  uint32_t w = wuffs_base__pixel_config__width(&ic->pixcfg);
  uint32_t h = wuffs_base__pixel_config__height(&ic->pixcfg);
  if ((w > 0xFFFFFF) || (h > 0xFFFFFF)) {
    wuffs_drop_in__stb__g_failure_reason = "image is too large";
    return NULL;
  } else if (info_only) {
    return NULL;
  }

  uint64_t pixbuf_len = (uint64_t)w * (uint64_t)h * (uint64_t)desired_channels;
  uint64_t workbuf_len = wuffs_base__image_decoder__workbuf_len(dec).max_incl;
#if SIZE_MAX < 0xFFFFFFFFFFFFFFFFull
  if ((pixbuf_len > ((uint64_t)SIZE_MAX)) ||
      (workbuf_len > ((uint64_t)SIZE_MAX))) {
    wuffs_drop_in__stb__g_failure_reason = "image is too large";
    return NULL;
  }
#endif
  void* pixbuf_ptr = malloc((size_t)pixbuf_len);
  if (!pixbuf_ptr) {
    wuffs_drop_in__stb__g_failure_reason = "out of memory";
    return NULL;
  }
  void* workbuf_ptr = malloc((size_t)workbuf_len);
  if (!workbuf_ptr) {
    free(pixbuf_ptr);
    wuffs_drop_in__stb__g_failure_reason = "out of memory";
    return NULL;
  }
  wuffs_base__slice_u8 workbuf =
      wuffs_base__make_slice_u8(workbuf_ptr, (size_t)workbuf_len);

  wuffs_base__pixel_config pc = ((wuffs_base__pixel_config){});
  wuffs_base__pixel_config__set(&pc, dst_pixfmt,
                                WUFFS_BASE__PIXEL_SUBSAMPLING__NONE, w, h);

  wuffs_base__pixel_buffer pb = ((wuffs_base__pixel_buffer){});
  {
    wuffs_base__status status = wuffs_base__pixel_buffer__set_from_slice(
        &pb, &pc, wuffs_base__make_slice_u8(pixbuf_ptr, (size_t)pixbuf_len));
    if (status.repr) {
      free(workbuf_ptr);
      free(pixbuf_ptr);
      wuffs_drop_in__stb__g_failure_reason = status.repr;
      return NULL;
    }
  }

  while (1) {
    wuffs_base__status status = wuffs_base__image_decoder__decode_frame(
        dec, &pb, srcbuf, WUFFS_BASE__PIXEL_BLEND__SRC, workbuf, NULL);
    if (status.repr == NULL) {
      break;
    } else if ((status.repr != wuffs_base__suspension__short_read) || !clbk) {
      free(workbuf_ptr);
      free(pixbuf_ptr);
      wuffs_drop_in__stb__g_failure_reason = status.repr;
      return NULL;
    }

    size_t wl = wuffs_base__io_buffer__writer_length(srcbuf);
    wuffs_base__io_buffer__compact(srcbuf);
    if (wl >= wuffs_base__io_buffer__writer_length(srcbuf)) {
      free(workbuf_ptr);
      free(pixbuf_ptr);
      wuffs_drop_in__stb__g_failure_reason = "I/O buffer is too small";
      return NULL;
    }
    wuffs_drop_in__stb__read(srcbuf, clbk, user);
  }

  free(workbuf_ptr);
  return pixbuf_ptr;
}

static void*                        //
wuffs_drop_in__stb__load0(          //
    wuffs_base__io_buffer* srcbuf,  //
    stbi_io_callbacks const* clbk,  //
    void* user,                     //
    int* x,                         //
    int* y,                         //
    int* channels_in_file,          //
    int desired_channels,           //
    int info_only) {
  uint32_t dst_pixfmt = 0;
  switch (desired_channels) {
    case 1:
      dst_pixfmt = WUFFS_BASE__PIXEL_FORMAT__Y;
      break;
    case 3:
      dst_pixfmt = WUFFS_BASE__PIXEL_FORMAT__RGB;
      break;
    case 4:
      dst_pixfmt = WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL;
      break;
    default:
      wuffs_drop_in__stb__g_failure_reason = "unsupported format conversion";
      return NULL;
  }

  wuffs_base__image_decoder* dec =
      wuffs_drop_in__stb__make_decoder(srcbuf, clbk, user);
  if (!dec) {
    if (wuffs_drop_in__stb__g_failure_reason == NULL) {
      wuffs_drop_in__stb__g_failure_reason = "couldn't allocate image decoder";
    }
    return NULL;
  }

  wuffs_base__image_config ic = ((wuffs_base__image_config){});
  stbi_uc* ret = wuffs_drop_in__stb__load1(
      srcbuf, clbk, user, dec, &ic, dst_pixfmt, desired_channels, info_only);
  free(dec);

  if (!info_only && !ret) {
    return NULL;
  }

  if (x) {
    *x = (int)wuffs_base__pixel_config__width(&ic.pixcfg);
  }
  if (y) {
    *y = (int)wuffs_base__pixel_config__height(&ic.pixcfg);
  }
  if (channels_in_file) {
    wuffs_base__pixel_format src_pixfmt =
        wuffs_base__pixel_config__pixel_format(&ic.pixcfg);
    uint32_t n_color = wuffs_base__pixel_format__coloration(&src_pixfmt);
    uint32_t n_alpha = wuffs_base__pixel_format__transparency(&src_pixfmt) !=
                       WUFFS_BASE__PIXEL_ALPHA_TRANSPARENCY__OPAQUE;
    *channels_in_file = (int)(n_color + n_alpha);
  }

  return ret;
}

// --------

WUFFS_DROP_IN__STB__MAYBE_STATIC int  //
stbi_info_from_memory(                //
    stbi_uc const* buffer,            //
    int len,                          //
    int* x,                           //
    int* y,                           //
    int* comp) {
  wuffs_drop_in__stb__g_failure_reason = NULL;
  if (len < 0) {
    wuffs_drop_in__stb__g_failure_reason = "negative buffer length";
    return 0;
  } else if (len == 0) {
    wuffs_drop_in__stb__g_failure_reason = "empty buffer";
    return 0;
  }
  wuffs_base__io_buffer srcbuf =
      wuffs_base__ptr_u8__reader((uint8_t*)(stbi_uc*)buffer, (size_t)len, true);
  wuffs_drop_in__stb__load0(&srcbuf, NULL, NULL, x, y, comp, 1, 1);
  return wuffs_drop_in__stb__g_failure_reason == NULL;
}

WUFFS_DROP_IN__STB__MAYBE_STATIC stbi_uc*  //
stbi_load_from_memory(                     //
    stbi_uc const* buffer,                 //
    int len,                               //
    int* x,                                //
    int* y,                                //
    int* channels_in_file,                 //
    int desired_channels) {
  wuffs_drop_in__stb__g_failure_reason = NULL;
  if (len < 0) {
    wuffs_drop_in__stb__g_failure_reason = "negative buffer length";
    return NULL;
  } else if (len == 0) {
    wuffs_drop_in__stb__g_failure_reason = "empty buffer";
    return NULL;
  }
  wuffs_base__io_buffer srcbuf =
      wuffs_base__ptr_u8__reader((uint8_t*)(stbi_uc*)buffer, (size_t)len, true);
  return wuffs_drop_in__stb__load0(&srcbuf, NULL, NULL, x, y, channels_in_file,
                                   desired_channels, 0);
}

WUFFS_DROP_IN__STB__MAYBE_STATIC int  //
stbi_info_from_callbacks(             //
    stbi_io_callbacks const* clbk,    //
    void* user,                       //
    int* x,                           //
    int* y,                           //
    int* comp) {
  wuffs_drop_in__stb__g_failure_reason = NULL;
  void* iobuf_ptr = malloc(65536u);
  if (!iobuf_ptr) {
    wuffs_drop_in__stb__g_failure_reason = "out of memory";
    return 0;
  }
  wuffs_base__io_buffer srcbuf =
      wuffs_base__ptr_u8__writer((uint8_t*)iobuf_ptr, 65536u);
  wuffs_drop_in__stb__load0(&srcbuf, clbk, user, x, y, comp, 1, 1);
  free(iobuf_ptr);
  return wuffs_drop_in__stb__g_failure_reason == NULL;
}

WUFFS_DROP_IN__STB__MAYBE_STATIC stbi_uc*  //
stbi_load_from_callbacks(                  //
    stbi_io_callbacks const* clbk,         //
    void* user,                            //
    int* x,                                //
    int* y,                                //
    int* channels_in_file,                 //
    int desired_channels) {
  wuffs_drop_in__stb__g_failure_reason = NULL;
  void* iobuf_ptr = malloc(65536u);
  if (!iobuf_ptr) {
    wuffs_drop_in__stb__g_failure_reason = "out of memory";
    return NULL;
  }
  wuffs_base__io_buffer srcbuf =
      wuffs_base__ptr_u8__writer((uint8_t*)iobuf_ptr, 65536u);
  stbi_uc* ret = wuffs_drop_in__stb__load0(
      &srcbuf, clbk, user, x, y, channels_in_file, desired_channels, 0);
  free(iobuf_ptr);
  return ret;
}

WUFFS_DROP_IN__STB__MAYBE_STATIC void  //
stbi_image_free(                       //
    void* retval_from_stbi_load) {
  wuffs_drop_in__stb__g_failure_reason = NULL;
  free(retval_from_stbi_load);
}

WUFFS_DROP_IN__STB__MAYBE_STATIC const char*  //
stbi_failure_reason(void) {
  return wuffs_drop_in__stb__g_failure_reason
             ? wuffs_drop_in__stb__g_failure_reason
             : "ok";
}

// --------

#if !defined(STBI_NO_STDIO)

#include <stdio.h>

// TODO: retry after EINTR?

static int                                 //
wuffs_drop_in__stb__file_callbacks__read(  //
    void* user,                            //
    char* data,                            //
    int size) {
  return (int)fread(data, 1u, (size_t)size, (FILE*)user);
}

static void                                //
wuffs_drop_in__stb__file_callbacks__skip(  //
    void* user,                            //
    int n) {
  fseek((FILE*)user, (long)n, SEEK_CUR);
}

static int                                //
wuffs_drop_in__stb__file_callbacks__eof(  //
    void* user) {
  return feof((FILE*)user);
}

WUFFS_DROP_IN__STB__MAYBE_STATIC int  //
stbi_info(                            //
    char const* filename,             //
    int* x,                           //
    int* y,                           //
    int* comp) {
  wuffs_drop_in__stb__g_failure_reason = NULL;
  FILE* f = fopen(filename, "rb");
  if (!f) {
    wuffs_drop_in__stb__g_failure_reason = "could not open file";
    return 0;
  }
  int ret = stbi_info_from_file(f, x, y, comp);
  fclose(f);
  return ret;
}

WUFFS_DROP_IN__STB__MAYBE_STATIC stbi_uc*  //
stbi_load(                                 //
    char const* filename,                  //
    int* x,                                //
    int* y,                                //
    int* channels_in_file,                 //
    int desired_channels) {
  wuffs_drop_in__stb__g_failure_reason = NULL;
  FILE* f = fopen(filename, "rb");
  if (!f) {
    wuffs_drop_in__stb__g_failure_reason = "could not open file";
    return NULL;
  }
  stbi_uc* ret =
      stbi_load_from_file(f, x, y, channels_in_file, desired_channels);
  fclose(f);
  return ret;
}

WUFFS_DROP_IN__STB__MAYBE_STATIC int  //
stbi_info_from_file(                  //
    FILE* f,                          //
    int* x,                           //
    int* y,                           //
    int* comp) {
  wuffs_drop_in__stb__g_failure_reason = NULL;
  void* iobuf_ptr = malloc(65536u);
  if (!iobuf_ptr) {
    wuffs_drop_in__stb__g_failure_reason = "out of memory";
    return 0;
  }
  wuffs_base__io_buffer srcbuf =
      wuffs_base__ptr_u8__writer((uint8_t*)iobuf_ptr, 65536u);
  stbi_io_callbacks clbk;
  clbk.read = &wuffs_drop_in__stb__file_callbacks__read;
  clbk.skip = &wuffs_drop_in__stb__file_callbacks__skip;
  clbk.eof = &wuffs_drop_in__stb__file_callbacks__eof;
  wuffs_drop_in__stb__load0(&srcbuf, &clbk, f, x, y, comp, 1, 1);
  free(iobuf_ptr);
  return wuffs_drop_in__stb__g_failure_reason == NULL;
}

WUFFS_DROP_IN__STB__MAYBE_STATIC stbi_uc*  //
stbi_load_from_file(                       //
    FILE* f,                               //
    int* x,                                //
    int* y,                                //
    int* channels_in_file,                 //
    int desired_channels) {
  wuffs_drop_in__stb__g_failure_reason = NULL;
  void* iobuf_ptr = malloc(65536u);
  if (!iobuf_ptr) {
    wuffs_drop_in__stb__g_failure_reason = "out of memory";
    return NULL;
  }
  wuffs_base__io_buffer srcbuf =
      wuffs_base__ptr_u8__writer((uint8_t*)iobuf_ptr, 65536u);
  stbi_io_callbacks clbk;
  clbk.read = &wuffs_drop_in__stb__file_callbacks__read;
  clbk.skip = &wuffs_drop_in__stb__file_callbacks__skip;
  clbk.eof = &wuffs_drop_in__stb__file_callbacks__eof;
  stbi_uc* ret = wuffs_drop_in__stb__load0(
      &srcbuf, &clbk, f, x, y, channels_in_file, desired_channels, 0);
  free(iobuf_ptr);
  return ret;
}

#endif  // !defined(STBI_NO_STDIO)

// --------

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // defined (WUFFS_CONFIG__ENABLE_DROP_IN_REPLACEMENT__STB)
#endif  // WUFFS_IMPLEMENTATION

#if defined(__GNUC__)
#pragma GCC diagnostic pop
#elif defined(__clang__)
#pragma clang diagnostic pop
#endif

#endif  // WUFFS_INCLUDE_GUARD