Rename token_buffer.{read,writ}er_available
diff --git a/internal/cgen/base/token-public.h b/internal/cgen/base/token-public.h
index f55b030..81fecde 100644
--- a/internal/cgen/base/token-public.h
+++ b/internal/cgen/base/token-public.h
@@ -311,9 +311,9 @@
 #ifdef __cplusplus
   inline bool is_valid() const;
   inline void compact();
-  inline uint64_t reader_available() const;
+  inline uint64_t reader_length() const;
   inline uint64_t reader_token_position() const;
-  inline uint64_t writer_available() const;
+  inline uint64_t writer_length() const;
   inline uint64_t writer_token_position() const;
 #endif  // __cplusplus
 
@@ -417,7 +417,7 @@
 }
 
 static inline uint64_t  //
-wuffs_base__token_buffer__reader_available(
+wuffs_base__token_buffer__reader_length(
     const wuffs_base__token_buffer* buf) {
   return buf ? buf->meta.wi - buf->meta.ri : 0;
 }
@@ -429,7 +429,7 @@
 }
 
 static inline uint64_t  //
-wuffs_base__token_buffer__writer_available(
+wuffs_base__token_buffer__writer_length(
     const wuffs_base__token_buffer* buf) {
   return buf ? buf->data.len - buf->meta.wi : 0;
 }
@@ -453,8 +453,8 @@
 }
 
 inline uint64_t  //
-wuffs_base__token_buffer::reader_available() const {
-  return wuffs_base__token_buffer__reader_available(this);
+wuffs_base__token_buffer::reader_length() const {
+  return wuffs_base__token_buffer__reader_length(this);
 }
 
 inline uint64_t  //
@@ -463,8 +463,8 @@
 }
 
 inline uint64_t  //
-wuffs_base__token_buffer::writer_available() const {
-  return wuffs_base__token_buffer__writer_available(this);
+wuffs_base__token_buffer::writer_length() const {
+  return wuffs_base__token_buffer__writer_length(this);
 }
 
 inline uint64_t  //
diff --git a/internal/cgen/data/data.go b/internal/cgen/data/data.go
index ac38350..b549885 100644
--- a/internal/cgen/data/data.go
+++ b/internal/cgen/data/data.go
@@ -334,11 +334,11 @@
 	"" +
 	"// --------\n\ntypedef WUFFS_BASE__SLICE(wuffs_base__token) wuffs_base__slice_token;\n\nstatic inline wuffs_base__slice_token  //\nwuffs_base__make_slice_token(wuffs_base__token* ptr, size_t len) {\n  wuffs_base__slice_token ret;\n  ret.ptr = ptr;\n  ret.len = len;\n  return ret;\n}\n\n" +
 	"" +
-	"// --------\n\n// wuffs_base__token_buffer_meta is the metadata for a\n// wuffs_base__token_buffer's data.\ntypedef struct {\n  size_t wi;     // Write index. Invariant: wi <= len.\n  size_t ri;     // Read  index. Invariant: ri <= wi.\n  uint64_t pos;  // Position of the buffer start relative to the stream start.\n  bool closed;   // No further writes are expected.\n} wuffs_base__token_buffer_meta;\n\n// wuffs_base__token_buffer is a 1-dimensional buffer (a pointer and length)\n// plus additional metadata.\n//\n// A value with all fields zero is a valid, empty buffer.\ntypedef struct {\n  wuffs_base__slice_token data;\n  wuffs_base__token_buffer_meta meta;\n\n#ifdef __cplusplus\n  inline bool is_valid() const;\n  inline void compact();\n  inline uint64_t reader_available() const;\n  inline uint64_t reader_token_position() const;\n  inline uint64_t writer_available() const;\n  inline uint64_t writer_token_position() const;\n#endif  // __cplusplus\n\n} wuffs_base__token_buffer;\n\nstatic inline wuffs_base__token_buffer  //\nwuffs_base__make" +
-	"_token_buffer(wuffs_base__slice_token data,\n                              wuffs_base__token_buffer_meta meta) {\n  wuffs_base__token_buffer ret;\n  ret.data = data;\n  ret.meta = meta;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer_meta  //\nwuffs_base__make_token_buffer_meta(size_t wi,\n                                   size_t ri,\n                                   uint64_t pos,\n                                   bool closed) {\n  wuffs_base__token_buffer_meta ret;\n  ret.wi = wi;\n  ret.ri = ri;\n  ret.pos = pos;\n  ret.closed = closed;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer  //\nwuffs_base__slice_token__reader(wuffs_base__slice_token s, bool closed) {\n  wuffs_base__token_buffer ret;\n  ret.data.ptr = s.ptr;\n  ret.data.len = s.len;\n  ret.meta.wi = s.len;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = closed;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer  //\nwuffs_base__slice_token__writer(wuffs_base__slice_token s) {\n  wuffs_base__token_buffer ret;\n  ret.data.ptr = s.ptr" +
-	";\n  ret.data.len = s.len;\n  ret.meta.wi = 0;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = false;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer  //\nwuffs_base__empty_token_buffer() {\n  wuffs_base__token_buffer ret;\n  ret.data.ptr = NULL;\n  ret.data.len = 0;\n  ret.meta.wi = 0;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = false;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer_meta  //\nwuffs_base__empty_token_buffer_meta() {\n  wuffs_base__token_buffer_meta ret;\n  ret.wi = 0;\n  ret.ri = 0;\n  ret.pos = 0;\n  ret.closed = false;\n  return ret;\n}\n\nstatic inline bool  //\nwuffs_base__token_buffer__is_valid(const wuffs_base__token_buffer* buf) {\n  if (buf) {\n    if (buf->data.ptr) {\n      return (buf->meta.ri <= buf->meta.wi) && (buf->meta.wi <= buf->data.len);\n    } else {\n      return (buf->meta.ri == 0) && (buf->meta.wi == 0) && (buf->data.len == 0);\n    }\n  }\n  return false;\n}\n\n// wuffs_base__token_buffer__compact moves any written but unread tokens to the\n// start of the " +
-	"buffer.\nstatic inline void  //\nwuffs_base__token_buffer__compact(wuffs_base__token_buffer* buf) {\n  if (!buf || (buf->meta.ri == 0)) {\n    return;\n  }\n  buf->meta.pos = wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri);\n  size_t n = buf->meta.wi - buf->meta.ri;\n  if (n != 0) {\n    memmove(buf->data.ptr, buf->data.ptr + buf->meta.ri,\n            n * sizeof(wuffs_base__token));\n  }\n  buf->meta.wi = n;\n  buf->meta.ri = 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__token_buffer__reader_available(\n    const wuffs_base__token_buffer* buf) {\n  return buf ? buf->meta.wi - buf->meta.ri : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__token_buffer__reader_token_position(\n    const wuffs_base__token_buffer* buf) {\n  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri) : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__token_buffer__writer_available(\n    const wuffs_base__token_buffer* buf) {\n  return buf ? buf->data.len - buf->meta.wi : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__token_buffer__writer_token_p" +
-	"osition(\n    const wuffs_base__token_buffer* buf) {\n  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.wi) : 0;\n}\n\n#ifdef __cplusplus\n\ninline bool  //\nwuffs_base__token_buffer::is_valid() const {\n  return wuffs_base__token_buffer__is_valid(this);\n}\n\ninline void  //\nwuffs_base__token_buffer::compact() {\n  wuffs_base__token_buffer__compact(this);\n}\n\ninline uint64_t  //\nwuffs_base__token_buffer::reader_available() const {\n  return wuffs_base__token_buffer__reader_available(this);\n}\n\ninline uint64_t  //\nwuffs_base__token_buffer::reader_token_position() const {\n  return wuffs_base__token_buffer__reader_token_position(this);\n}\n\ninline uint64_t  //\nwuffs_base__token_buffer::writer_available() const {\n  return wuffs_base__token_buffer__writer_available(this);\n}\n\ninline uint64_t  //\nwuffs_base__token_buffer::writer_token_position() const {\n  return wuffs_base__token_buffer__writer_token_position(this);\n}\n\n#endif  // __cplusplus\n" +
+	"// --------\n\n// wuffs_base__token_buffer_meta is the metadata for a\n// wuffs_base__token_buffer's data.\ntypedef struct {\n  size_t wi;     // Write index. Invariant: wi <= len.\n  size_t ri;     // Read  index. Invariant: ri <= wi.\n  uint64_t pos;  // Position of the buffer start relative to the stream start.\n  bool closed;   // No further writes are expected.\n} wuffs_base__token_buffer_meta;\n\n// wuffs_base__token_buffer is a 1-dimensional buffer (a pointer and length)\n// plus additional metadata.\n//\n// A value with all fields zero is a valid, empty buffer.\ntypedef struct {\n  wuffs_base__slice_token data;\n  wuffs_base__token_buffer_meta meta;\n\n#ifdef __cplusplus\n  inline bool is_valid() const;\n  inline void compact();\n  inline uint64_t reader_length() const;\n  inline uint64_t reader_token_position() const;\n  inline uint64_t writer_length() const;\n  inline uint64_t writer_token_position() const;\n#endif  // __cplusplus\n\n} wuffs_base__token_buffer;\n\nstatic inline wuffs_base__token_buffer  //\nwuffs_base__make_token" +
+	"_buffer(wuffs_base__slice_token data,\n                              wuffs_base__token_buffer_meta meta) {\n  wuffs_base__token_buffer ret;\n  ret.data = data;\n  ret.meta = meta;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer_meta  //\nwuffs_base__make_token_buffer_meta(size_t wi,\n                                   size_t ri,\n                                   uint64_t pos,\n                                   bool closed) {\n  wuffs_base__token_buffer_meta ret;\n  ret.wi = wi;\n  ret.ri = ri;\n  ret.pos = pos;\n  ret.closed = closed;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer  //\nwuffs_base__slice_token__reader(wuffs_base__slice_token s, bool closed) {\n  wuffs_base__token_buffer ret;\n  ret.data.ptr = s.ptr;\n  ret.data.len = s.len;\n  ret.meta.wi = s.len;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = closed;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer  //\nwuffs_base__slice_token__writer(wuffs_base__slice_token s) {\n  wuffs_base__token_buffer ret;\n  ret.data.ptr = s.ptr;\n  re" +
+	"t.data.len = s.len;\n  ret.meta.wi = 0;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = false;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer  //\nwuffs_base__empty_token_buffer() {\n  wuffs_base__token_buffer ret;\n  ret.data.ptr = NULL;\n  ret.data.len = 0;\n  ret.meta.wi = 0;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = false;\n  return ret;\n}\n\nstatic inline wuffs_base__token_buffer_meta  //\nwuffs_base__empty_token_buffer_meta() {\n  wuffs_base__token_buffer_meta ret;\n  ret.wi = 0;\n  ret.ri = 0;\n  ret.pos = 0;\n  ret.closed = false;\n  return ret;\n}\n\nstatic inline bool  //\nwuffs_base__token_buffer__is_valid(const wuffs_base__token_buffer* buf) {\n  if (buf) {\n    if (buf->data.ptr) {\n      return (buf->meta.ri <= buf->meta.wi) && (buf->meta.wi <= buf->data.len);\n    } else {\n      return (buf->meta.ri == 0) && (buf->meta.wi == 0) && (buf->data.len == 0);\n    }\n  }\n  return false;\n}\n\n// wuffs_base__token_buffer__compact moves any written but unread tokens to the\n// start of the buffer" +
+	".\nstatic inline void  //\nwuffs_base__token_buffer__compact(wuffs_base__token_buffer* buf) {\n  if (!buf || (buf->meta.ri == 0)) {\n    return;\n  }\n  buf->meta.pos = wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri);\n  size_t n = buf->meta.wi - buf->meta.ri;\n  if (n != 0) {\n    memmove(buf->data.ptr, buf->data.ptr + buf->meta.ri,\n            n * sizeof(wuffs_base__token));\n  }\n  buf->meta.wi = n;\n  buf->meta.ri = 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__token_buffer__reader_length(\n    const wuffs_base__token_buffer* buf) {\n  return buf ? buf->meta.wi - buf->meta.ri : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__token_buffer__reader_token_position(\n    const wuffs_base__token_buffer* buf) {\n  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri) : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__token_buffer__writer_length(\n    const wuffs_base__token_buffer* buf) {\n  return buf ? buf->data.len - buf->meta.wi : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__token_buffer__writer_token_position(\n   " +
+	" const wuffs_base__token_buffer* buf) {\n  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.wi) : 0;\n}\n\n#ifdef __cplusplus\n\ninline bool  //\nwuffs_base__token_buffer::is_valid() const {\n  return wuffs_base__token_buffer__is_valid(this);\n}\n\ninline void  //\nwuffs_base__token_buffer::compact() {\n  wuffs_base__token_buffer__compact(this);\n}\n\ninline uint64_t  //\nwuffs_base__token_buffer::reader_length() const {\n  return wuffs_base__token_buffer__reader_length(this);\n}\n\ninline uint64_t  //\nwuffs_base__token_buffer::reader_token_position() const {\n  return wuffs_base__token_buffer__reader_token_position(this);\n}\n\ninline uint64_t  //\nwuffs_base__token_buffer::writer_length() const {\n  return wuffs_base__token_buffer__writer_length(this);\n}\n\ninline uint64_t  //\nwuffs_base__token_buffer::writer_token_position() const {\n  return wuffs_base__token_buffer__writer_token_position(this);\n}\n\n#endif  // __cplusplus\n" +
 	""
 
 const BaseFloatConvSubmoduleCodeC = "" +
diff --git a/release/c/wuffs-unsupported-snapshot.c b/release/c/wuffs-unsupported-snapshot.c
index d6c078e..1649b76 100644
--- a/release/c/wuffs-unsupported-snapshot.c
+++ b/release/c/wuffs-unsupported-snapshot.c
@@ -2429,9 +2429,9 @@
 #ifdef __cplusplus
   inline bool is_valid() const;
   inline void compact();
-  inline uint64_t reader_available() const;
+  inline uint64_t reader_length() const;
   inline uint64_t reader_token_position() const;
-  inline uint64_t writer_available() const;
+  inline uint64_t writer_length() const;
   inline uint64_t writer_token_position() const;
 #endif  // __cplusplus
 
@@ -2535,7 +2535,7 @@
 }
 
 static inline uint64_t  //
-wuffs_base__token_buffer__reader_available(
+wuffs_base__token_buffer__reader_length(
     const wuffs_base__token_buffer* buf) {
   return buf ? buf->meta.wi - buf->meta.ri : 0;
 }
@@ -2547,7 +2547,7 @@
 }
 
 static inline uint64_t  //
-wuffs_base__token_buffer__writer_available(
+wuffs_base__token_buffer__writer_length(
     const wuffs_base__token_buffer* buf) {
   return buf ? buf->data.len - buf->meta.wi : 0;
 }
@@ -2571,8 +2571,8 @@
 }
 
 inline uint64_t  //
-wuffs_base__token_buffer::reader_available() const {
-  return wuffs_base__token_buffer__reader_available(this);
+wuffs_base__token_buffer::reader_length() const {
+  return wuffs_base__token_buffer__reader_length(this);
 }
 
 inline uint64_t  //
@@ -2581,8 +2581,8 @@
 }
 
 inline uint64_t  //
-wuffs_base__token_buffer::writer_available() const {
-  return wuffs_base__token_buffer__writer_available(this);
+wuffs_base__token_buffer::writer_length() const {
+  return wuffs_base__token_buffer__writer_length(this);
 }
 
 inline uint64_t  //