| // Code generated by running "go generate". DO NOT EDIT. |
| |
| // Copyright 2017 The Puffs Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package cgen |
| |
| const baseHeader = "" + |
| "#ifndef PUFFS_BASE_HEADER_H\n#define PUFFS_BASE_HEADER_H\n\n// Copyright 2017 The Puffs Authors.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// https://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n#include <stdbool.h>\n#include <stdint.h>\n#include <string.h>\n\n// Puffs requires a word size of at least 32 bits because it assumes that\n// converting a u32 to usize will never overflow. For example, the size of a\n// decoded image is often represented, explicitly or implicitly in an image\n// file, as a u32, and it is convenient to compare that to a buffer size.\n//\n// Si" + |
| "milarly, the word size is at most 64 bits because it assumes that\n// converting a usize to u64 will never overflow.\n#if __WORDSIZE < 32\n#error \"Puffs requires a word size of at least 32 bits\"\n#elif __WORDSIZE > 64\n#error \"Puffs requires a word size of at most 64 bits\"\n#endif\n\n// PUFFS_VERSION is the major.minor version number as a uint32. The major\n// number is the high 16 bits. The minor number is the low 16 bits.\n//\n// The intention is to bump the version number at least on every API / ABI\n// backwards incompatible change.\n//\n// For now, the API and ABI are simply unstable and can change at any time.\n//\n// TODO: don't hard code this in base-header.h.\n#define PUFFS_VERSION (0x00001)\n\n// puffs_base_slice_u8 is a 1-dimensional buffer (a pointer and length).\n//\n// A value with all fields NULL or zero is a valid, empty slice.\ntypedef struct {\n uint8_t* ptr;\n size_t len;\n} puffs_base_slice_u8;\n\n// puffs_base_buf1 is a 1-dimensional buffer (a pointer and length), plus\n// additional indexes into that buffer, plus" + |
| " an opened / closed flag.\n//\n// A value with all fields NULL or zero is a valid, empty buffer.\ntypedef struct {\n uint8_t* ptr; // Pointer.\n size_t len; // Length.\n size_t wi; // Write index. Invariant: wi <= len.\n size_t ri; // Read index. Invariant: ri <= wi.\n bool closed; // No further writes are expected.\n} puffs_base_buf1;\n\n// puffs_base_limit1 provides a limited view of a 1-dimensional byte stream:\n// its first N bytes. That N can be greater than a buffer's current read or\n// write capacity. N decreases naturally over time as bytes are read from or\n// written to the stream.\n//\n// A value with all fields NULL or zero is a valid, unlimited view.\ntypedef struct puffs_base_limit1 {\n uint64_t* ptr_to_len; // Pointer to N.\n struct puffs_base_limit1* next; // Linked list of limits.\n} puffs_base_limit1;\n\ntypedef struct {\n puffs_base_buf1* buf;\n puffs_base_limit1 limit;\n} puffs_base_reader1;\n\ntypedef struct {\n puffs_base_buf1* buf;\n puffs_base_limit1 limit;\n} puffs_base_write" + |
| "r1;\n\n#endif // PUFFS_BASE_HEADER_H\n" + |
| "" |
| |
| const baseImpl = "" + |
| "#ifndef PUFFS_BASE_IMPL_H\n#define PUFFS_BASE_IMPL_H\n\n// Copyright 2017 The Puffs Authors.\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// https://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n#define PUFFS_IGNORE_POTENTIALLY_UNUSED_VARIABLE(x) (void)(x)\n\n// Use switch cases for coroutine suspension points, similar to the technique\n// in https://www.chiark.greenend.org.uk/~sgtatham/coroutines.html\n//\n// We use a trivial macro instead of an explicit assignment and case statement\n// so that clang-format doesn't get confused by the unusual \"case\"s.\n#define PUFFS_CO" + |
| "ROUTINE_SUSPENSION_POINT(n) \\\n coro_susp_point = n; \\\n case n:;\n\n#define PUFFS_COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(n) \\\n if (status < 0) { \\\n goto exit; \\\n } else if (status == 0) { \\\n goto ok; \\\n } \\\n coro_susp_point = n; \\\n goto suspend; \\\n case n:;\n\n// Clang also defines \"__GNUC__\".\n#if defined(__GNUC__)\n#define PUFFS_LIKELY(expr) (__builtin_expect(!!(expr), 1))\n#define PUFFS_UNLIKELY(expr) (__builtin_expect(!!(expr), 0))\n// Declare the printf prototype. The generated code shouldn't need this at all,\n// but it's useful for manual printf debugging.\nextern int printf(const char* __restrict __format, ...);\n#else\n#define PUFFS_LIKELY(expr) (expr)\n#define PUFFS_UNLIKELY(expr) (expr)\n#endif\n" + |
| "\n// ---------------- Static Inline Functions\n//\n// The helpers below are functions, instead of macros, because their arguments\n// can be an expression that we shouldn't evaluate more than once.\n//\n// They are in base-impl.h and hence copy/pasted into every generated C file,\n// instead of being in some \"base.c\" file, since a design goal is that users of\n// the generated C code can often just #include a single .c file, such as\n// \"gif.c\", without having to additionally include or otherwise build and link\n// a \"base.c\" file.\n//\n// They are static, so that linking multiple puffs .o files won't complain about\n// duplicate function definitions.\n//\n// They are explicitly marked inline, even if modern compilers don't use the\n// inline attribute to guide optimizations such as inlining, to avoid the\n// -Wunused-function warning, and we like to compile with -Wall -Werror.\n\nstatic inline uint16_t puffs_base_load_u16be(uint8_t* p) {\n return ((uint16_t)(p[0]) << 8) | ((uint16_t)(p[1]) << 0);\n}\n\nstatic inline uint16_t puff" + |
| "s_base_load_u16le(uint8_t* p) {\n return ((uint16_t)(p[0]) << 0) | ((uint16_t)(p[1]) << 8);\n}\n\nstatic inline uint32_t puffs_base_load_u32be(uint8_t* p) {\n return ((uint32_t)(p[0]) << 24) | ((uint32_t)(p[1]) << 16) |\n ((uint32_t)(p[2]) << 8) | ((uint32_t)(p[3]) << 0);\n}\n\nstatic inline uint32_t puffs_base_load_u32le(uint8_t* p) {\n return ((uint32_t)(p[0]) << 0) | ((uint32_t)(p[1]) << 8) |\n ((uint32_t)(p[2]) << 16) | ((uint32_t)(p[3]) << 24);\n}\n\nstatic inline puffs_base_slice_u8 puffs_base_slice_u8_subslice_i(\n puffs_base_slice_u8 s,\n uint64_t i) {\n if ((i <= SIZE_MAX) && (i <= s.len)) {\n return ((puffs_base_slice_u8){\n .ptr = s.ptr + i,\n .len = s.len - i,\n });\n }\n return ((puffs_base_slice_u8){});\n}\n\nstatic inline puffs_base_slice_u8 puffs_base_slice_u8_subslice_j(\n puffs_base_slice_u8 s,\n uint64_t j) {\n if ((j <= SIZE_MAX) && (j <= s.len)) {\n return ((puffs_base_slice_u8){.ptr = s.ptr, .len = j});\n }\n return ((puffs_base_slice_u8){});\n}\n\nstatic inline " + |
| "puffs_base_slice_u8\npuffs_base_slice_u8_subslice_ij(puffs_base_slice_u8 s, uint64_t i, uint64_t j) {\n if ((i <= j) && (j <= SIZE_MAX) && (j <= s.len)) {\n return ((puffs_base_slice_u8){\n .ptr = s.ptr + i,\n .len = j - i,\n });\n }\n return ((puffs_base_slice_u8){});\n}\n\n// puffs_base_slice_u8_prefix returns up to the first up_to bytes of s.\nstatic inline puffs_base_slice_u8 puffs_base_slice_u8_prefix(\n puffs_base_slice_u8 s,\n uint64_t up_to) {\n if ((uint64_t)(s.len) > up_to) {\n s.len = up_to;\n }\n return s;\n}\n\n// puffs_base_slice_u8_suffix returns up to the last up_to bytes of s.\nstatic inline puffs_base_slice_u8 puffs_base_slice_u8_suffix(\n puffs_base_slice_u8 s,\n uint64_t up_to) {\n if ((uint64_t)(s.len) > up_to) {\n s.ptr += (uint64_t)(s.len) - up_to;\n s.len = up_to;\n }\n return s;\n}\n\n// puffs_base_slice_u8_copy_from_slice calls memmove(dst.ptr, src.ptr, length)\n// where length is the minimum of dst.len and src.len.\n//\n// Passing a puffs_base_slice_u8 with all fields" + |
| " NULL or zero (a valid, empty\n// slice) is valid and results in a no-op.\nstatic inline uint64_t puffs_base_slice_u8_copy_from_slice(\n puffs_base_slice_u8 dst,\n puffs_base_slice_u8 src) {\n size_t length = dst.len < src.len ? dst.len : src.len;\n if (length > 0) {\n memmove(dst.ptr, src.ptr, length);\n }\n return length;\n}\n\nstatic inline uint32_t puffs_base_writer1_copy_from_history32(uint8_t** ptr_ptr,\n uint8_t* start,\n uint8_t* end,\n uint32_t distance,\n uint32_t length) {\n uint8_t* ptr = *ptr_ptr;\n size_t d = ptr - start;\n if ((d == 0) || (d < (size_t)(distance))) {\n return 0;\n }\n start = ptr - distance;\n size_t n = end - ptr;\n if ((size_t)(length) > n) {\n length = n;\n } else {\n n = length;\n }\n // TODO: is manual unrolling actually helpful?\n " + |
| " for (; n >= 8; n -= 8) {\n *ptr++ = *start++;\n *ptr++ = *start++;\n *ptr++ = *start++;\n *ptr++ = *start++;\n *ptr++ = *start++;\n *ptr++ = *start++;\n *ptr++ = *start++;\n *ptr++ = *start++;\n }\n for (; n; n--) {\n *ptr++ = *start++;\n }\n *ptr_ptr = ptr;\n return length;\n}\n\nstatic inline uint32_t puffs_base_writer1_copy_from_reader32(uint8_t** ptr_wptr,\n uint8_t* wend,\n uint8_t** ptr_rptr,\n uint8_t* rend,\n uint32_t length) {\n uint8_t* wptr = *ptr_wptr;\n size_t n = length;\n if (n > wend - wptr) {\n n = wend - wptr;\n }\n uint8_t* rptr = *ptr_rptr;\n if (n > rend - rptr) {\n n = rend - rptr;\n }\n if (n > 0) {\n memmove(wptr, rptr, n);\n *ptr_wptr += n;\n *ptr_rptr += n;\n }\n return n;\n}\n\nstatic inline uint64_t puffs_base_writer1_copy_from" + |
| "_slice(\n uint8_t** ptr_wptr,\n uint8_t* wend,\n puffs_base_slice_u8 src) {\n uint8_t* wptr = *ptr_wptr;\n size_t n = src.len;\n if (n > wend - wptr) {\n n = wend - wptr;\n }\n if (n > 0) {\n memmove(wptr, src.ptr, n);\n *ptr_wptr += n;\n }\n return n;\n}\n\nstatic inline uint32_t puffs_base_writer1_copy_from_slice32(\n uint8_t** ptr_wptr,\n uint8_t* wend,\n puffs_base_slice_u8 src,\n uint32_t length) {\n uint8_t* wptr = *ptr_wptr;\n size_t n = src.len;\n if (n > length) {\n n = length;\n }\n if (n > wend - wptr) {\n n = wend - wptr;\n }\n if (n > 0) {\n memmove(wptr, src.ptr, n);\n *ptr_wptr += n;\n }\n return n;\n}\n\n#endif // PUFFS_BASE_IMPL_H\n" + |
| "" |
| |
| type template_args_short_read struct { |
| PKGPREFIX string |
| name string |
| } |
| |
| func template_short_read(b *buffer, args template_args_short_read) error { |
| b.printf("short_read_%s:\nif (a_%s.buf && a_%s.buf->closed && !a_%s.limit.ptr_to_len) {\nstatus = %sERROR_UNEXPECTED_EOF;\ngoto exit;\n}\nstatus = %sSUSPENSION_SHORT_READ;\ngoto suspend;\n", |
| args.name, |
| args.name, |
| args.name, |
| args.name, |
| args.PKGPREFIX, |
| args.PKGPREFIX, |
| ) |
| return nil |
| } |
