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author | Nigel Tao <nigeltao@golang.org> | 2021-03-12 14:47:34 +1100 |
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committer | Nigel Tao <nigeltao@golang.org> | 2021-03-12 14:47:34 +1100 |
commit | 212a0e9fc309f9b67a42d3dc1a7e6f0d91a47401 (patch) | |
tree | d5d037e692e69c6a86ed39c0aed60a7712b42460 | |
parent | 86273deaa2f2d961df1ae03b792118ad51a00ae3 (diff) | |
download | wuffs-mirror-release-c-212a0e9fc309f9b67a42d3dc1a7e6f0d91a47401.tar.gz |
Run script/sync.sh
-rw-r--r-- | release/c/README.md | 23 | ||||
-rw-r--r-- | release/c/wuffs-v0.2.c | 11858 | ||||
-rw-r--r-- | sync.txt | 6 |
3 files changed, 11887 insertions, 0 deletions
diff --git a/release/c/README.md b/release/c/README.md new file mode 100644 index 0000000..73f42f8 --- /dev/null +++ b/release/c/README.md @@ -0,0 +1,23 @@ +# Releases (in the C Programming Language) + +[Wuffs the Library](/doc/wuffs-the-library.md) ships as a "single file C +library", also known as a "[header file +library](https://github.com/nothings/stb/blob/master/docs/stb_howto.txt)". + +To use that library in your C/C++ project, you just need to copy one file from +this directory, or otherwise integrate that one file into your build system. +Typically, pick the latest stable version (but not the unsupported snapshot), +with a filename like `wuffs-vMAJOR.MINOR.c` for version MAJOR.MINOR. + +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. + + +# Latest Stable Version + +**Version 0.2 (December 2019)** is the latest stable version. Stable means that +its API won't change any further, but being a "version 0.x" means that: + +- It will not have long term support. +- Newer versions make no promises about compatibility. diff --git a/release/c/wuffs-v0.2.c b/release/c/wuffs-v0.2.c new file mode 100644 index 0000000..f26262a --- /dev/null +++ b/release/c/wuffs-v0.2.c @@ -0,0 +1,11858 @@ +#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. + +// Copyright 2017 The Wuffs 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. + +#include <stdbool.h> +#include <stdint.h> +#include <string.h> + +// GCC does not warn for unused *static inline* functions, but clang does. +#ifdef __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wunused-function" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// 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. +#ifdef __WORDSIZE +#if (__WORDSIZE != 32) && (__WORDSIZE != 64) +#error "Wuffs requires a word size of either 32 or 64 bits" +#endif +#endif + +// 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. +// +// WUFFS_VERSION was overridden by "wuffs gen -version" based on revision +// b36c9f019f2908639b0bb4dd5b8337bb3daf3271 committed on 2019-12-19. +#define WUFFS_VERSION ((uint64_t)0x0000000000020000) +#define WUFFS_VERSION_MAJOR ((uint64_t)0x00000000) +#define WUFFS_VERSION_MINOR ((uint64_t)0x0002) +#define WUFFS_VERSION_PATCH ((uint64_t)0x0000) +#define WUFFS_VERSION_PRE_RELEASE_LABEL "" +#define WUFFS_VERSION_BUILD_METADATA_COMMIT_COUNT 2078 +#define WUFFS_VERSION_BUILD_METADATA_COMMIT_DATE 20191219 +#define WUFFS_VERSION_STRING "0.2.0+2078.20191219" + +// Define WUFFS_CONFIG__STATIC_FUNCTIONS to make all of Wuffs' functions have +// static storage. The motivation is discussed in the "ALLOW STATIC +// IMPLEMENTATION" section of +// https://raw.githubusercontent.com/nothings/stb/master/docs/stb_howto.txt +#ifdef WUFFS_CONFIG__STATIC_FUNCTIONS +#define WUFFS_BASE__MAYBE_STATIC static +#else +#define WUFFS_BASE__MAYBE_STATIC +#endif + +#if defined(__clang__) +#define WUFFS_BASE__POTENTIALLY_UNUSED_FIELD __attribute__((unused)) +#else +#define WUFFS_BASE__POTENTIALLY_UNUSED_FIELD +#endif + +// Clang also defines "__GNUC__". +#if defined(__GNUC__) +#define WUFFS_BASE__POTENTIALLY_UNUSED __attribute__((unused)) +#define WUFFS_BASE__WARN_UNUSED_RESULT __attribute__((warn_unused_result)) +#else +#define WUFFS_BASE__POTENTIALLY_UNUSED +#define WUFFS_BASE__WARN_UNUSED_RESULT +#endif + +// Flags 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/master/doc/note/initialization.md +#define WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED \ + ((uint32_t)0x00000002) + +// -------- + +// 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 { + // 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() { + 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 { + // 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; + +// -------- + +// See https://github.com/google/wuffs/blob/master/doc/note/statuses.md +typedef const char* wuffs_base__status; + +extern const char* wuffs_base__warning__end_of_data; +extern const char* wuffs_base__warning__metadata_reported; +extern const char* wuffs_base__suspension__short_read; +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_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_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_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__interleaved_coroutine_calls; +extern const char* wuffs_base__error__not_enough_data; +extern const char* wuffs_base__error__unsupported_option; +extern const char* wuffs_base__error__too_much_data; + +static inline bool // +wuffs_base__status__is_complete(wuffs_base__status z) { + return (z == NULL) || ((*z != '$') && (*z != '#')); +} + +static inline bool // +wuffs_base__status__is_error(wuffs_base__status z) { + return z && (*z == '#'); +} + +static inline bool // +wuffs_base__status__is_ok(wuffs_base__status z) { + return z == NULL; +} + +static inline bool // +wuffs_base__status__is_suspension(wuffs_base__status z) { + return z && (*z == '$'); +} + +static inline bool // +wuffs_base__status__is_warning(wuffs_base__status z) { + return z && (*z != '$') && (*z != '#'); +} + +// wuffs_base__status__message strips the leading '$', '#' or '@'. +static inline const char* // +wuffs_base__status__message(wuffs_base__status z) { + if (z) { + if ((*z == '$') || (*z == '#') || (*z == '@')) { + return z + 1; + } + } + return z; +} + +// -------- + +// FourCC constants. + +// International Color Consortium Profile. +#define WUFFS_BASE__FOURCC__ICCP 0x49434350 + +// Extensible Metadata Platform. +#define WUFFS_BASE__FOURCC__XMP 0x584D5020 + +// -------- + +// 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 + +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; +} + +// -------- + +// 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; +} + +// ---------------- 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__empty_slice_u8() { + wuffs_base__slice_u8 ret; + ret.ptr = NULL; + ret.len = 0; + return ret; +} + +static inline wuffs_base__table_u8 // +wuffs_base__empty_table_u8() { + wuffs_base__table_u8 ret; + ret.ptr = NULL; + ret.width = 0; + ret.height = 0; + ret.stride = 0; + return ret; +} + +// 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, s.len - i); + } + return wuffs_base__make_slice_u8(NULL, 0); +} + +// 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, j); + } + return wuffs_base__make_slice_u8(NULL, 0); +} + +// 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, j - i); + } + return wuffs_base__make_slice_u8(NULL, 0); +} + +// ---------------- Ranges and Rects + +// See https://github.com/google/wuffs/blob/master/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__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__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__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__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__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__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 + +// ---------------- 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 { + 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__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__slice_u8 data; + wuffs_base__io_buffer_meta meta; + +#ifdef __cplusplus + inline void compact(); + inline uint64_t reader_available() const; + inline uint64_t reader_io_position() const; + inline uint64_t writer_available() const; + inline uint64_t writer_io_position() 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__empty_io_buffer() { + 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() { + wuffs_base__io_buffer_meta ret; + ret.wi = 0; + ret.ri = 0; + ret.pos = 0; + ret.closed = false; + return ret; +} + +// 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 n = buf->meta.wi - buf->meta.ri; + if (n != 0) { + memmove(buf->data.ptr, buf->data.ptr + buf->meta.ri, n); + } + buf->meta.wi = n; + buf->meta.ri = 0; +} + +static inline uint64_t // +wuffs_base__io_buffer__reader_available(const wuffs_base__io_buffer* buf) { + return buf ? buf->meta.wi - buf->meta.ri : 0; +} + +static inline uint64_t // +wuffs_base__io_buffer__reader_io_position(const wuffs_base__io_buffer* buf) { + return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri) : 0; +} + +static inline uint64_t // +wuffs_base__io_buffer__writer_available(const wuffs_base__io_buffer* buf) { + return buf ? buf->data.len - buf->meta.wi : 0; +} + +static inline uint64_t // +wuffs_base__io_buffer__writer_io_position(const wuffs_base__io_buffer* buf) { + return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.wi) : 0; +} + +#ifdef __cplusplus + +inline void // +wuffs_base__io_buffer::compact() { + wuffs_base__io_buffer__compact(this); +} + +inline uint64_t // +wuffs_base__io_buffer::reader_available() const { + return wuffs_base__io_buffer__reader_available(this); +} + +inline uint64_t // +wuffs_base__io_buffer::reader_io_position() const { + return wuffs_base__io_buffer__reader_io_position(this); +} + +inline uint64_t // +wuffs_base__io_buffer::writer_available() const { + return wuffs_base__io_buffer__writer_available(this); +} + +inline uint64_t // +wuffs_base__io_buffer::writer_io_position() const { + return wuffs_base__io_buffer__writer_io_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 * +// 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 <= (SIZE_MAX / sizeof(uint8_t)))) { + void* p = (*malloc_func)(num_u8 * sizeof(uint8_t)); + if (p) { + return wuffs_base__make_slice_u8((uint8_t*)(p), num_u8); + } + } + return wuffs_base__make_slice_u8(NULL, 0); +} + +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 <= (SIZE_MAX / sizeof(uint16_t)))) { + void* p = (*malloc_func)(num_u16 * sizeof(uint16_t)); + if (p) { + return wuffs_base__make_slice_u16((uint16_t*)(p), num_u16); + } + } + return wuffs_base__make_slice_u16(NULL, 0); +} + +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 <= (SIZE_MAX / sizeof(uint32_t)))) { + void* p = (*malloc_func)(num_u32 * sizeof(uint32_t)); + if (p) { + return wuffs_base__make_slice_u32((uint32_t*)(p), num_u32); + } + } + return wuffs_base__make_slice_u32(NULL, 0); +} + +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 <= (SIZE_MAX / sizeof(uint64_t)))) { + void* p = (*malloc_func)(num_u64 * sizeof(uint64_t)); + if (p) { + return wuffs_base__make_slice_u64((uint64_t*)(p), num_u64); + } + } + return wuffs_base__make_slice_u64(NULL, 0); +} + +// ---------------- Images + +// wuffs_base__color_u32_argb_premul is an 8 bit per channel premultiplied +// Alpha, Red, Green, Blue color, as a uint32_t value. It is in word order, not +// byte order: its value is always 0xAARRGGBB, regardless of endianness. +typedef uint32_t wuffs_base__color_u32_argb_premul; + +// -------- + +// 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/master/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 uint32_t wuffs_base__pixel_format; + +// Common 8-bit-depth pixel formats. This list is not exhaustive; not all valid +// wuffs_base__pixel_format values are present. + +#define WUFFS_BASE__PIXEL_FORMAT__INVALID ((wuffs_base__pixel_format)0x00000000) + +#define WUFFS_BASE__PIXEL_FORMAT__A ((wuffs_base__pixel_format)0x02000008) + +#define WUFFS_BASE__PIXEL_FORMAT__Y ((wuffs_base__pixel_format)0x10000008) +#define WUFFS_BASE__PIXEL_FORMAT__YA_NONPREMUL \ + ((wuffs_base__pixel_format)0x15000008) +#define WUFFS_BASE__PIXEL_FORMAT__YA_PREMUL \ + ((wuffs_base__pixel_format)0x16000008) + +#define WUFFS_BASE__PIXEL_FORMAT__YCBCR ((wuffs_base__pixel_format)0x20020888) +#define WUFFS_BASE__PIXEL_FORMAT__YCBCRK ((wuffs_base__pixel_format)0x21038888) +#define WUFFS_BASE__PIXEL_FORMAT__YCBCRA_NONPREMUL \ + ((wuffs_base__pixel_format)0x25038888) + +#define WUFFS_BASE__PIXEL_FORMAT__YCOCG ((wuffs_base__pixel_format)0x30020888) +#define WUFFS_BASE__PIXEL_FORMAT__YCOCGK ((wuffs_base__pixel_format)0x31038888) +#define WUFFS_BASE__PIXEL_FORMAT__YCOCGA_NONPREMUL \ + ((wuffs_base__pixel_format)0x35038888) + +#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL \ + ((wuffs_base__pixel_format)0x45040008) +#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL \ + ((wuffs_base__pixel_format)0x46040008) +#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY \ + ((wuffs_base__pixel_format)0x47040008) + +#define WUFFS_BASE__PIXEL_FORMAT__BGR ((wuffs_base__pixel_format)0x40000888) +#define WUFFS_BASE__PIXEL_FORMAT__BGRX ((wuffs_base__pixel_format)0x41008888) +#define WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL \ + ((wuffs_base__pixel_format)0x45008888) +#define WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL \ + ((wuffs_base__pixel_format)0x46008888) +#define WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY \ + ((wuffs_base__pixel_format)0x47008888) + +#define WUFFS_BASE__PIXEL_FORMAT__RGB ((wuffs_base__pixel_format)0x50000888) +#define WUFFS_BASE__PIXEL_FORMAT__RGBX ((wuffs_base__pixel_format)0x51008888) +#define WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL \ + ((wuffs_base__pixel_format)0x55008888) +#define WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL \ + ((wuffs_base__pixel_format)0x56008888) +#define WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY \ + ((wuffs_base__pixel_format)0x57008888) + +#define WUFFS_BASE__PIXEL_FORMAT__CMY ((wuffs_base__pixel_format)0x60020888) +#define WUFFS_BASE__PIXEL_FORMAT__CMYK ((wuffs_base__pixel_format)0x61038888) + +extern const uint32_t wuffs_base__pixel_format__bits_per_channel[16]; + +static inline bool // +wuffs_base__pixel_format__is_valid(wuffs_base__pixel_format f) { + return f != 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(wuffs_base__pixel_format f) { + if (((f >> 16) & 0x03) != 0) { + return 0; + } + return wuffs_base__pixel_format__bits_per_channel[0x0F & (f >> 0)] + + wuffs_base__pixel_format__bits_per_channel[0x0F & (f >> 4)] + + wuffs_base__pixel_format__bits_per_channel[0x0F & (f >> 8)] + + wuffs_base__pixel_format__bits_per_channel[0x0F & (f >> 12)]; +} + +static inline bool // +wuffs_base__pixel_format__is_indexed(wuffs_base__pixel_format f) { + return (f >> 18) & 0x01; +} + +static inline bool // +wuffs_base__pixel_format__is_interleaved(wuffs_base__pixel_format f) { + return ((f >> 16) & 0x03) == 0; +} + +static inline bool // +wuffs_base__pixel_format__is_planar(wuffs_base__pixel_format f) { + return ((f >> 16) & 0x03) != 0; +} + +static inline uint32_t // +wuffs_base__pixel_format__num_planes(wuffs_base__pixel_format f) { + return ((f >> 16) & 0x03) + 1; +} + +#define WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX 4 + +#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__INDEX_PLANE 0 +#define WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE 3 + +// -------- + +// wuffs_base__pixel_subsampling encodes whether sample values cover one pixel +// or cover multiple pixels. +// +// See https://github.com/google/wuffs/blob/master/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 uint32_t wuffs_base__pixel_subsampling; + +#define WUFFS_BASE__PIXEL_SUBSAMPLING__NONE ((wuffs_base__pixel_subsampling)0) + +#define WUFFS_BASE__PIXEL_SUBSAMPLING__444 \ + ((wuffs_base__pixel_subsampling)0x000000) +#define WUFFS_BASE__PIXEL_SUBSAMPLING__440 \ + ((wuffs_base__pixel_subsampling)0x010100) +#define WUFFS_BASE__PIXEL_SUBSAMPLING__422 \ + ((wuffs_base__pixel_subsampling)0x101000) +#define WUFFS_BASE__PIXEL_SUBSAMPLING__420 \ + ((wuffs_base__pixel_subsampling)0x111100) +#define WUFFS_BASE__PIXEL_SUBSAMPLING__411 \ + ((wuffs_base__pixel_subsampling)0x303000) +#define WUFFS_BASE__PIXEL_SUBSAMPLING__410 \ + ((wuffs_base__pixel_subsampling)0x313100) + +static inline uint32_t // +wuffs_base__pixel_subsampling__bias_x(wuffs_base__pixel_subsampling s, + uint32_t plane) { + uint32_t shift = ((plane & 0x03) * 8) + 6; + return (s >> shift) & 0x03; +} + +static inline uint32_t // +wuffs_base__pixel_subsampling__denominator_x(wuffs_base__pixel_subsampling s, + uint32_t plane) { + uint32_t shift = ((plane & 0x03) * 8) + 4; + return ((s >> shift) & 0x03) + 1; +} + +static inline uint32_t // +wuffs_base__pixel_subsampling__bias_y(wuffs_base__pixel_subsampling s, + uint32_t plane) { + uint32_t shift = ((plane & 0x03) * 8) + 2; + return (s >> shift) & 0x03; +} + +static inline uint32_t // +wuffs_base__pixel_subsampling__denominator_y(wuffs_base__pixel_subsampling s, + uint32_t plane) { + uint32_t shift = ((plane & 0x03) * 8) + 0; + return ((s >> shift) & 0x03) + 1; +} + +// -------- + +typedef 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(wuffs_base__pixel_format pixfmt, + wuffs_base__pixel_subsampling pixsub, + 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() { + wuffs_base__pixel_config ret; + ret.private_impl.pixfmt = 0; + ret.private_impl.pixsub = 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, + wuffs_base__pixel_format pixfmt, + wuffs_base__pixel_subsampling pixsub, + uint32_t width, + uint32_t height) { + if (!c) { + return; + } + if (pixfmt) { + uint64_t wh = ((uint64_t)width) * ((uint64_t)height); + // TODO: handle things other than 1 byte per pixel. + if (wh <= ((uint64_t)SIZE_MAX)) { + c->private_impl.pixfmt = pixfmt; + c->private_impl.pixsub = pixsub; + c->private_impl.width = width; + c->private_impl.height = height; + return; + } + } + + c->private_impl.pixfmt = 0; + c->private_impl.pixsub = 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 = 0; + c->private_impl.pixsub = 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; +} + +static inline wuffs_base__pixel_format // +wuffs_base__pixel_config__pixel_format(const wuffs_base__pixel_config* c) { + return c ? c->private_impl.pixfmt : 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 : 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 - 1024)) { + return 0; + } + n += 1024; + } + + return n; +} + +#ifdef __cplusplus + +inline void // +wuffs_base__pixel_config::set(wuffs_base__pixel_format pixfmt, + wuffs_base__pixel_subsampling pixsub, + uint32_t width, + uint32_t height) { + wuffs_base__pixel_config__set(this, pixfmt, pixsub, 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__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(wuffs_base__pixel_format pixfmt, + wuffs_base__pixel_subsampling pixsub, + 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() { + 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, + wuffs_base__pixel_format pixfmt, + wuffs_base__pixel_subsampling pixsub, + uint32_t width, + uint32_t height, + uint64_t first_frame_io_position, + bool first_frame_is_opaque) { + if (!c) { + return; + } + if (wuffs_base__pixel_format__is_valid(pixfmt)) { + c->pixcfg.private_impl.pixfmt = pixfmt; + c->pixcfg.private_impl.pixsub = pixsub; + 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 = 0; + c->pixcfg.private_impl.pixsub = 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 = 0; + c->pixcfg.private_impl.pixsub = 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(wuffs_base__pixel_format pixfmt, + wuffs_base__pixel_subsampling pixsub, + uint32_t width, + uint32_t height, + uint64_t first_frame_io_position, + bool first_frame_is_opaque) { + wuffs_base__image_config__set(this, pixfmt, pixsub, 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_blend encodes, for an animated image, how to blend the +// transparent pixels of this frame with the existing canvas. In Porter-Duff +// compositing operator terminology: +// - 0 means the frame may be transparent, and should be blended "src over +// dst", also known as just "over". +// - 1 means the frame may be transparent, and should be blended "src". +// - 2 means the frame is completely opaque, so that "src over dst" and "src" +// are equivalent. +// +// These semantics are conservative. It is valid for a completely opaque frame +// to have a blend value other than 2. +typedef uint8_t wuffs_base__animation_blend; + +#define WUFFS_BASE__ANIMATION_BLEND__SRC_OVER_DST \ + ((wuffs_base__animation_blend)0) +#define WUFFS_BASE__ANIMATION_BLEND__SRC ((wuffs_base__animation_blend)1) +#define WUFFS_BASE__ANIMATION_BLEND__OPAQUE ((wuffs_base__animation_blend)2) + +// -------- + +// 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 { + // 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_blend blend; + wuffs_base__animation_disposal disposal; + wuffs_base__color_u32_argb_premul background_color; + } private_impl; + +#ifdef __cplusplus + inline void update(wuffs_base__rect_ie_u32 bounds, + wuffs_base__flicks duration, + uint64_t index, + uint64_t io_position, + wuffs_base__animation_blend blend, + wuffs_base__animation_disposal disposal, + 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_blend blend() const; + inline wuffs_base__animation_disposal disposal() 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() { + 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.blend = 0; + ret.private_impl.disposal = 0; + return ret; +} + +static inline void // +wuffs_base__frame_config__update( + 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_blend blend, + wuffs_base__animation_disposal disposal, + 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.blend = blend; + c->private_impl.disposal = disposal; + 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__blend returns, for an animated image, how to blend +// the transparent pixels of this frame with the existing canvas. +static inline wuffs_base__animation_blend // +wuffs_base__frame_config__blend(const wuffs_base__frame_config* c) { + return c ? c->private_impl.blend : 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; +} + +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::update( + wuffs_base__rect_ie_u32 bounds, + wuffs_base__flicks duration, + uint64_t index, + uint64_t io_position, + wuffs_base__animation_blend blend, + wuffs_base__animation_disposal disposal, + wuffs_base__color_u32_argb_premul background_color) { + wuffs_base__frame_config__update(this, bounds, duration, index, io_position, + blend, disposal, 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_blend // +wuffs_base__frame_config::blend() const { + return wuffs_base__frame_config__blend(this); +} + +inline wuffs_base__animation_disposal // +wuffs_base__frame_config::disposal() const { + return wuffs_base__frame_config__disposal(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_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]; + // TODO: color spaces. + } private_impl; + +#ifdef __cplusplus + inline wuffs_base__status set_from_slice( + const wuffs_base__pixel_config* pixcfg, + wuffs_base__slice_u8 pixbuf_memory); + inline wuffs_base__status set_from_table( + const wuffs_base__pixel_config* pixcfg, + wuffs_base__table_u8 pixbuf_memory); + inline wuffs_base__slice_u8 palette(); + inline wuffs_base__pixel_format pixel_format() const; + inline wuffs_base__table_u8 plane(uint32_t p); +#endif // __cplusplus + +} wuffs_base__pixel_buffer; + +static inline wuffs_base__pixel_buffer // +wuffs_base__null_pixel_buffer() { + 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_from_slice(wuffs_base__pixel_buffer* b, + const wuffs_base__pixel_config* pixcfg, + wuffs_base__slice_u8 pixbuf_memory) { + if (!b) { + return wuffs_base__error__bad_receiver; + } + memset(b, 0, sizeof(*b)); + if (!pixcfg) { + return 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__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__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 1024 byte chunk (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 < 1024) { + return wuffs_base__error__bad_argument_length_too_short; + } + wuffs_base__table_u8* tab = + &b->private_impl.planes[WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE]; + tab->ptr = ptr; + tab->width = 1024; + tab->height = 1; + tab->stride = 1024; + ptr += 1024; + len -= 1024; + } + + 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__error__bad_argument; + } + wh *= bytes_per_pixel; + width *= bytes_per_pixel; + if (wh > len) { + return wuffs_base__error__bad_argument_length_too_short; + } + + b->pixcfg = *pixcfg; + wuffs_base__table_u8* tab = &b->private_impl.planes[0]; + tab->ptr = ptr; + tab->width = width; + tab->height = pixcfg->private_impl.height; + tab->stride = width; + return NULL; +} + +static inline wuffs_base__status // +wuffs_base__pixel_buffer__set_from_table(wuffs_base__pixel_buffer* b, + const wuffs_base__pixel_config* pixcfg, + wuffs_base__table_u8 pixbuf_memory) { + if (!b) { + return wuffs_base__error__bad_receiver; + } + memset(b, 0, sizeof(*b)); + if (!pixcfg || + wuffs_base__pixel_format__is_planar(pixcfg->private_impl.pixfmt)) { + return wuffs_base__error__bad_argument; + } + 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__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 > pixbuf_memory.width) || + (pixcfg->private_impl.height > pixbuf_memory.height)) { + return wuffs_base__error__bad_argument; + } + + b->pixcfg = *pixcfg; + b->private_impl.planes[0] = pixbuf_memory; + return NULL; +} + +// wuffs_base__pixel_buffer__palette returns the palette color data. If +// non-empty, it will have length 1024. +static inline wuffs_base__slice_u8 // +wuffs_base__pixel_buffer__palette(wuffs_base__pixel_buffer* b) { + if (b && + wuffs_base__pixel_format__is_indexed(b->pixcfg.private_impl.pixfmt)) { + wuffs_base__table_u8* tab = + &b->private_impl.planes[WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE]; + if ((tab->width == 1024) && (tab->height == 1)) { + return wuffs_base__make_slice_u8(tab->ptr, 1024); + } + } + return wuffs_base__make_slice_u8(NULL, 0); +} + +static inline wuffs_base__pixel_format // +wuffs_base__pixel_buffer__pixel_format(const wuffs_base__pixel_buffer* b) { + if (b) { + return b->pixcfg.private_impl.pixfmt; + } + return WUFFS_BASE__PIXEL_FORMAT__INVALID; +} + +static inline wuffs_base__table_u8 // +wuffs_base__pixel_buffer__plane(wuffs_base__pixel_buffer* b, uint32_t p) { + if (b && (p < WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX)) { + return b->private_impl.planes[p]; + } + + wuffs_base__table_u8 ret; + ret.ptr = NULL; + ret.width = 0; + ret.height = 0; + ret.stride = 0; + return ret; +} + +#ifdef __cplusplus + +inline wuffs_base__status // +wuffs_base__pixel_buffer::set_from_slice(const wuffs_base__pixel_config* pixcfg, + wuffs_base__slice_u8 pixbuf_memory) { + return wuffs_base__pixel_buffer__set_from_slice(this, pixcfg, pixbuf_memory); +} + +inline wuffs_base__status // +wuffs_base__pixel_buffer::set_from_table(const wuffs_base__pixel_config* pixcfg, + wuffs_base__table_u8 pixbuf_memory) { + return wuffs_base__pixel_buffer__set_from_table(this, pixcfg, pixbuf_memory); +} + +inline wuffs_base__slice_u8 // +wuffs_base__pixel_buffer::palette() { + return wuffs_base__pixel_buffer__palette(this); +} + +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); +} + +#endif // __cplusplus + +// -------- + +typedef 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 + +// -------- + +typedef struct { + // Do not access the private_impl's fields directly. There is no API/ABI + // compatibility or safety guarantee if you do so. + struct { + // TODO: should the func type take restrict pointers? + uint64_t (*func)(wuffs_base__slice_u8 dst, + wuffs_base__slice_u8 dst_palette, + wuffs_base__slice_u8 src); + } private_impl; + +#ifdef __cplusplus + inline wuffs_base__status prepare(wuffs_base__pixel_format dst_format, + wuffs_base__slice_u8 dst_palette, + wuffs_base__pixel_format src_format, + wuffs_base__slice_u8 src_palette); + inline uint64_t swizzle_interleaved(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__status // +wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p, + wuffs_base__pixel_format dst_format, + wuffs_base__slice_u8 dst_palette, + wuffs_base__pixel_format src_format, + wuffs_base__slice_u8 src_palette); + +uint64_t // +wuffs_base__pixel_swizzler__swizzle_interleaved( + 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_format, + wuffs_base__slice_u8 dst_palette, + wuffs_base__pixel_format src_format, + wuffs_base__slice_u8 src_palette) { + return wuffs_base__pixel_swizzler__prepare(this, dst_format, dst_palette, + src_format, src_palette); +} + +uint64_t // +wuffs_base__pixel_swizzler::swizzle_interleaved( + wuffs_base__slice_u8 dst, + wuffs_base__slice_u8 dst_palette, + wuffs_base__slice_u8 src) const { + return wuffs_base__pixel_swizzler__swizzle_interleaved(this, dst, dst_palette, + src); +} + +#endif // __cplusplus + +#ifdef __cplusplus +} // extern "C" +#endif + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// ---------------- Status Codes + +// ---------------- Public Consts + +// ---------------- Struct Declarations + +typedef struct wuffs_adler32__hasher__struct wuffs_adler32__hasher; + +// ---------------- 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 initialize_flags. + +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 initialize_flags); + +size_t // +sizeof__wuffs_adler32__hasher(); + +// ---------------- Public Function Prototypes + +WUFFS_BASE__MAYBE_STATIC uint32_t // +wuffs_adler32__hasher__update_u32(wuffs_adler32__hasher* self, + wuffs_base__slice_u8 a_x); + +// ---------------- 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 { +#ifdef WUFFS_IMPLEMENTATION + + // 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; + + uint32_t f_state; + bool f_started; + + } private_impl; + +#else // WUFFS_IMPLEMENTATION + + // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is + // large enough to discourage trying to allocate one on the stack. The sizeof + // the real private_impl (and the sizeof the real outermost wuffs_foo__bar + // struct) is not part of the public, stable, memory-safe API. Call + // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their + // first argument) instead of fiddling with bar.private_impl.qux fields. + // + // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still + // defines C++ convenience methods. These methods forward on "this", so that + // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". + private: + union { + uint32_t align_as_per_magic_field; + uint8_t placeholder[1073741824]; // 1 GiB. + } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; + + public: + +#endif // WUFFS_IMPLEMENTATION + +#ifdef __cplusplus + + inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // + initialize(size_t sizeof_star_self, + uint64_t wuffs_version, + uint32_t initialize_flags) { + return wuffs_adler32__hasher__initialize(this, sizeof_star_self, + wuffs_version, initialize_flags); + } + + inline uint32_t // + update_u32(wuffs_base__slice_u8 a_x) { + return wuffs_adler32__hasher__update_u32(this, a_x); + } + +#if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + // Disallow copy and assign. + wuffs_adler32__hasher__struct(const wuffs_adler32__hasher__struct&) = delete; + wuffs_adler32__hasher__struct& operator=( + const wuffs_adler32__hasher__struct&) = delete; +#endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + +#endif // __cplusplus + +}; // struct wuffs_adler32__hasher__struct + +#endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) + +#ifdef __cplusplus +} // extern "C" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// ---------------- Status Codes + +// ---------------- Public Consts + +// ---------------- Struct Declarations + +typedef struct wuffs_crc32__ieee_hasher__struct wuffs_crc32__ieee_hasher; + +// ---------------- 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 initialize_flags. + +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 initialize_flags); + +size_t // +sizeof__wuffs_crc32__ieee_hasher(); + +// ---------------- Public Function Prototypes + +WUFFS_BASE__MAYBE_STATIC uint32_t // +wuffs_crc32__ieee_hasher__update_u32(wuffs_crc32__ieee_hasher* self, + wuffs_base__slice_u8 a_x); + +// ---------------- 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 { +#ifdef WUFFS_IMPLEMENTATION + + // 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; + + uint32_t f_state; + + } private_impl; + +#else // WUFFS_IMPLEMENTATION + + // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is + // large enough to discourage trying to allocate one on the stack. The sizeof + // the real private_impl (and the sizeof the real outermost wuffs_foo__bar + // struct) is not part of the public, stable, memory-safe API. Call + // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their + // first argument) instead of fiddling with bar.private_impl.qux fields. + // + // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still + // defines C++ convenience methods. These methods forward on "this", so that + // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". + private: + union { + uint32_t align_as_per_magic_field; + uint8_t placeholder[1073741824]; // 1 GiB. + } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; + + public: + +#endif // WUFFS_IMPLEMENTATION + +#ifdef __cplusplus + + inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // + initialize(size_t sizeof_star_self, + uint64_t wuffs_version, + uint32_t initialize_flags) { + return wuffs_crc32__ieee_hasher__initialize( + this, sizeof_star_self, wuffs_version, initialize_flags); + } + + inline uint32_t // + update_u32(wuffs_base__slice_u8 a_x) { + return wuffs_crc32__ieee_hasher__update_u32(this, a_x); + } + +#if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + // Disallow copy and assign. + 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 // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + +#endif // __cplusplus + +}; // struct wuffs_crc32__ieee_hasher__struct + +#endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) + +#ifdef __cplusplus +} // extern "C" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// ---------------- 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; + +// ---------------- Public Consts + +#define WUFFS_DEFLATE__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1 + +// ---------------- Struct Declarations + +typedef struct wuffs_deflate__decoder__struct wuffs_deflate__decoder; + +// ---------------- 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 initialize_flags. + +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 initialize_flags); + +size_t // +sizeof__wuffs_deflate__decoder(); + +// ---------------- Public Function Prototypes + +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__MAYBE_STATIC wuffs_base__range_ii_u64 // +wuffs_deflate__decoder__workbuf_len(const wuffs_deflate__decoder* self); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__status // +wuffs_deflate__decoder__decode_io_writer(wuffs_deflate__decoder* self, + wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src, + wuffs_base__slice_u8 a_workbuf); + +// ---------------- 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 { +#ifdef WUFFS_IMPLEMENTATION + + // 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; + + uint32_t f_bits; + uint32_t f_n_bits; + uint32_t f_history_index; + uint32_t f_n_huffs_bits[2]; + bool f_end_of_block; + + uint32_t p_decode_io_writer[1]; + uint32_t p_decode_blocks[1]; + uint32_t p_decode_uncompressed[1]; + uint32_t p_init_dynamic_huffman[1]; + uint32_t p_decode_huffman_slow[1]; + } private_impl; + + struct { + uint32_t f_huffs[2][1024]; + uint8_t f_history[32768]; + uint8_t f_code_lengths[320]; + + struct { + uint32_t v_final; + } s_decode_blocks[1]; + struct { + uint32_t v_length; + uint64_t scratch; + } s_decode_uncompressed[1]; + 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_table_entry; + uint32_t v_n_extra_bits; + uint8_t v_rep_symbol; + uint32_t v_rep_count; + } s_init_dynamic_huffman[1]; + struct { + uint32_t v_bits; + uint32_t v_n_bits; + uint32_t v_table_entry; + 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; + uint32_t v_hlen; + uint32_t v_hdist; + } s_decode_huffman_slow[1]; + } private_data; + +#else // WUFFS_IMPLEMENTATION + + // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is + // large enough to discourage trying to allocate one on the stack. The sizeof + // the real private_impl (and the sizeof the real outermost wuffs_foo__bar + // struct) is not part of the public, stable, memory-safe API. Call + // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their + // first argument) instead of fiddling with bar.private_impl.qux fields. + // + // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still + // defines C++ convenience methods. These methods forward on "this", so that + // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". + private: + union { + uint32_t align_as_per_magic_field; + uint8_t placeholder[1073741824]; // 1 GiB. + } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; + + public: + +#endif // WUFFS_IMPLEMENTATION + +#ifdef __cplusplus + + inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // + initialize(size_t sizeof_star_self, + uint64_t wuffs_version, + uint32_t initialize_flags) { + return wuffs_deflate__decoder__initialize(this, sizeof_star_self, + wuffs_version, initialize_flags); + } + + inline wuffs_base__empty_struct // + add_history(wuffs_base__slice_u8 a_hist) { + return wuffs_deflate__decoder__add_history(this, a_hist); + } + + inline wuffs_base__range_ii_u64 // + workbuf_len() const { + return wuffs_deflate__decoder__workbuf_len(this); + } + + inline wuffs_base__status // + decode_io_writer(wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src, + wuffs_base__slice_u8 a_workbuf) { + return wuffs_deflate__decoder__decode_io_writer(this, a_dst, a_src, + a_workbuf); + } + +#if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + // Disallow copy and assign. + wuffs_deflate__decoder__struct(const wuffs_deflate__decoder__struct&) = + delete; + wuffs_deflate__decoder__struct& operator=( + const wuffs_deflate__decoder__struct&) = delete; +#endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + +#endif // __cplusplus + +}; // struct wuffs_deflate__decoder__struct + +#endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) + +#ifdef __cplusplus +} // extern "C" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// ---------------- Status Codes + +extern const char* wuffs_lzw__error__bad_code; + +// ---------------- Public Consts + +#define WUFFS_LZW__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0 + +// ---------------- Struct Declarations + +typedef struct wuffs_lzw__decoder__struct wuffs_lzw__decoder; + +// ---------------- 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 initialize_flags. + +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 initialize_flags); + +size_t // +sizeof__wuffs_lzw__decoder(); + +// ---------------- Public Function Prototypes + +WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // +wuffs_lzw__decoder__set_literal_width(wuffs_lzw__decoder* self, uint32_t a_lw); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // +wuffs_lzw__decoder__workbuf_len(const wuffs_lzw__decoder* self); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__status // +wuffs_lzw__decoder__decode_io_writer(wuffs_lzw__decoder* self, + wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src, + wuffs_base__slice_u8 a_workbuf); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__slice_u8 // +wuffs_lzw__decoder__flush(wuffs_lzw__decoder* self); + +// ---------------- 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 { +#ifdef WUFFS_IMPLEMENTATION + + // 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; + + uint32_t f_set_literal_width_arg; + 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_decode_io_writer[1]; + uint32_t p_write_to[1]; + } private_impl; + + struct { + uint8_t f_suffixes[4096][8]; + uint16_t f_lm1s[4096]; + uint8_t f_output[8199]; + + } private_data; + +#else // WUFFS_IMPLEMENTATION + + // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is + // large enough to discourage trying to allocate one on the stack. The sizeof + // the real private_impl (and the sizeof the real outermost wuffs_foo__bar + // struct) is not part of the public, stable, memory-safe API. Call + // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their + // first argument) instead of fiddling with bar.private_impl.qux fields. + // + // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still + // defines C++ convenience methods. These methods forward on "this", so that + // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". + private: + union { + uint32_t align_as_per_magic_field; + uint8_t placeholder[1073741824]; // 1 GiB. + } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; + + public: + +#endif // WUFFS_IMPLEMENTATION + +#ifdef __cplusplus + + inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // + initialize(size_t sizeof_star_self, + uint64_t wuffs_version, + uint32_t initialize_flags) { + return wuffs_lzw__decoder__initialize(this, sizeof_star_self, wuffs_version, + initialize_flags); + } + + inline wuffs_base__empty_struct // + set_literal_width(uint32_t a_lw) { + return wuffs_lzw__decoder__set_literal_width(this, a_lw); + } + + inline wuffs_base__range_ii_u64 // + workbuf_len() const { + return wuffs_lzw__decoder__workbuf_len(this); + } + + inline wuffs_base__status // + decode_io_writer(wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src, + wuffs_base__slice_u8 a_workbuf) { + return wuffs_lzw__decoder__decode_io_writer(this, a_dst, a_src, a_workbuf); + } + + inline wuffs_base__slice_u8 // + flush() { + return wuffs_lzw__decoder__flush(this); + } + +#if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + // Disallow copy and assign. + wuffs_lzw__decoder__struct(const wuffs_lzw__decoder__struct&) = delete; + wuffs_lzw__decoder__struct& operator=(const wuffs_lzw__decoder__struct&) = + delete; +#endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + +#endif // __cplusplus + +}; // struct wuffs_lzw__decoder__struct + +#endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) + +#ifdef __cplusplus +} // extern "C" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// ---------------- Status Codes + +extern const char* wuffs_gif__error__bad_block; +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; + +// ---------------- Public Consts + +#define WUFFS_GIF__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1 + +#define WUFFS_GIF__QUIRK_DELAY_NUM_DECODED_FRAMES 1041635328 + +#define WUFFS_GIF__QUIRK_FIRST_FRAME_LOCAL_PALETTE_MEANS_BLACK_BACKGROUND \ + 1041635329 + +#define WUFFS_GIF__QUIRK_HONOR_BACKGROUND_COLOR 1041635330 + +#define WUFFS_GIF__QUIRK_IGNORE_TOO_MUCH_PIXEL_DATA 1041635331 + +#define WUFFS_GIF__QUIRK_IMAGE_BOUNDS_ARE_STRICT 1041635332 + +#define WUFFS_GIF__QUIRK_REJECT_EMPTY_FRAME 1041635333 + +#define WUFFS_GIF__QUIRK_REJECT_EMPTY_PALETTE 1041635334 + +// ---------------- Struct Declarations + +typedef struct wuffs_gif__decoder__struct wuffs_gif__decoder; + +// ---------------- 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 initialize_flags. + +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 initialize_flags); + +size_t // +sizeof__wuffs_gif__decoder(); + +// ---------------- Public Function Prototypes + +WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // +wuffs_gif__decoder__set_quirk_enabled(wuffs_gif__decoder* self, + uint32_t a_quirk, + bool a_enabled); + +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__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__MAYBE_STATIC wuffs_base__status // +wuffs_gif__decoder__ack_metadata_chunk(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +WUFFS_BASE__MAYBE_STATIC uint32_t // +wuffs_gif__decoder__metadata_fourcc(const wuffs_gif__decoder* self); + +WUFFS_BASE__MAYBE_STATIC uint64_t // +wuffs_gif__decoder__metadata_chunk_length(const wuffs_gif__decoder* self); + +WUFFS_BASE__MAYBE_STATIC uint32_t // +wuffs_gif__decoder__num_animation_loops(const wuffs_gif__decoder* self); + +WUFFS_BASE__MAYBE_STATIC uint64_t // +wuffs_gif__decoder__num_decoded_frame_configs(const wuffs_gif__decoder* self); + +WUFFS_BASE__MAYBE_STATIC uint64_t // +wuffs_gif__decoder__num_decoded_frames(const wuffs_gif__decoder* self); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32 // +wuffs_gif__decoder__frame_dirty_rect(const wuffs_gif__decoder* self); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // +wuffs_gif__decoder__workbuf_len(const wuffs_gif__decoder* self); + +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__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__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__slice_u8 a_workbuf, + wuffs_base__decode_frame_options* a_opts); + +// ---------------- 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 { +#ifdef WUFFS_IMPLEMENTATION + + // 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; + + uint32_t f_width; + uint32_t f_height; + uint8_t f_call_sequence; + bool f_ignore_metadata; + bool f_report_metadata_iccp; + bool f_report_metadata_xmp; + uint32_t f_metadata_fourcc_value; + uint64_t f_metadata_chunk_length_value; + uint64_t f_metadata_io_position; + bool f_quirk_enabled_delay_num_decoded_frames; + bool f_quirk_enabled_first_frame_local_palette_means_black_background; + bool f_quirk_enabled_honor_background_color; + bool f_quirk_enabled_ignore_too_much_pixel_data; + bool f_quirk_enabled_image_bounds_are_strict; + bool f_quirk_enabled_reject_empty_frame; + bool f_quirk_enabled_reject_empty_palette; + bool f_delayed_num_decoded_frames; + bool f_end_of_data; + bool f_restarted; + bool f_previous_lzw_decode_ended_abruptly; + bool f_has_global_palette; + uint8_t f_interlace; + bool f_seen_num_loops; + uint32_t f_num_loops; + 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 p_decode_image_config[1]; + uint32_t p_ack_metadata_chunk[1]; + uint32_t p_decode_frame_config[1]; + uint32_t p_skip_frame[1]; + uint32_t p_decode_frame[1]; + uint32_t p_decode_up_to_id_part1[1]; + uint32_t p_decode_header[1]; + uint32_t p_decode_lsd[1]; + uint32_t p_decode_extension[1]; + uint32_t p_skip_blocks[1]; + uint32_t p_decode_ae[1]; + uint32_t p_decode_gc[1]; + uint32_t p_decode_id_part0[1]; + uint32_t p_decode_id_part1[1]; + uint32_t p_decode_id_part2[1]; + } private_impl; + + struct { + uint8_t f_compressed[4096]; + uint8_t f_palettes[2][1024]; + uint8_t f_dst_palette[1024]; + wuffs_lzw__decoder f_lzw; + + struct { + uint8_t v_blend; + uint32_t v_background_color; + } s_decode_frame_config[1]; + struct { + uint64_t scratch; + } s_skip_frame[1]; + struct { + uint8_t v_c[6]; + uint32_t v_i; + } s_decode_header[1]; + 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[1]; + struct { + uint64_t scratch; + } s_skip_blocks[1]; + 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[1]; + struct { + uint64_t scratch; + } s_decode_gc[1]; + struct { + uint64_t scratch; + } s_decode_id_part0[1]; + struct { + uint8_t v_which_palette; + uint32_t v_num_palette_entries; + uint32_t v_i; + uint64_t scratch; + } s_decode_id_part1[1]; + struct { + uint64_t v_block_size; + bool v_need_block_size; + wuffs_base__status v_lzw_status; + uint64_t scratch; + } s_decode_id_part2[1]; + } private_data; + +#else // WUFFS_IMPLEMENTATION + + // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is + // large enough to discourage trying to allocate one on the stack. The sizeof + // the real private_impl (and the sizeof the real outermost wuffs_foo__bar + // struct) is not part of the public, stable, memory-safe API. Call + // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their + // first argument) instead of fiddling with bar.private_impl.qux fields. + // + // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still + // defines C++ convenience methods. These methods forward on "this", so that + // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". + private: + union { + uint32_t align_as_per_magic_field; + uint8_t placeholder[1073741824]; // 1 GiB. + } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; + + public: + +#endif // WUFFS_IMPLEMENTATION + +#ifdef __cplusplus + + inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // + initialize(size_t sizeof_star_self, + uint64_t wuffs_version, + uint32_t initialize_flags) { + return wuffs_gif__decoder__initialize(this, sizeof_star_self, wuffs_version, + initialize_flags); + } + + inline wuffs_base__empty_struct // + set_quirk_enabled(uint32_t a_quirk, bool a_enabled) { + return wuffs_gif__decoder__set_quirk_enabled(this, a_quirk, a_enabled); + } + + 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 // + ack_metadata_chunk(wuffs_base__io_buffer* a_src) { + return wuffs_gif__decoder__ack_metadata_chunk(this, a_src); + } + + inline uint32_t // + metadata_fourcc() const { + return wuffs_gif__decoder__metadata_fourcc(this); + } + + inline uint64_t // + metadata_chunk_length() const { + return wuffs_gif__decoder__metadata_chunk_length(this); + } + + 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__slice_u8 a_workbuf, + wuffs_base__decode_frame_options* a_opts) { + return wuffs_gif__decoder__decode_frame(this, a_dst, a_src, a_workbuf, + a_opts); + } + +#if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + // Disallow copy and assign. + wuffs_gif__decoder__struct(const wuffs_gif__decoder__struct&) = delete; + wuffs_gif__decoder__struct& operator=(const wuffs_gif__decoder__struct&) = + delete; +#endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + +#endif // __cplusplus + +}; // struct wuffs_gif__decoder__struct + +#endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) + +#ifdef __cplusplus +} // extern "C" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// ---------------- 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; + +// ---------------- Public Consts + +#define WUFFS_GZIP__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1 + +// ---------------- Struct Declarations + +typedef struct wuffs_gzip__decoder__struct wuffs_gzip__decoder; + +// ---------------- 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 initialize_flags. + +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 initialize_flags); + +size_t // +sizeof__wuffs_gzip__decoder(); + +// ---------------- Public Function Prototypes + +WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // +wuffs_gzip__decoder__set_ignore_checksum(wuffs_gzip__decoder* self, bool a_ic); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // +wuffs_gzip__decoder__workbuf_len(const wuffs_gzip__decoder* self); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__status // +wuffs_gzip__decoder__decode_io_writer(wuffs_gzip__decoder* self, + wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src, + wuffs_base__slice_u8 a_workbuf); + +// ---------------- 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 { +#ifdef WUFFS_IMPLEMENTATION + + // 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; + + bool f_ignore_checksum; + + uint32_t p_decode_io_writer[1]; + } private_impl; + + struct { + wuffs_crc32__ieee_hasher f_checksum; + wuffs_deflate__decoder f_flate; + + struct { + uint8_t v_flags; + uint32_t v_checksum_got; + uint32_t v_decoded_length_got; + uint32_t v_checksum_want; + uint64_t scratch; + } s_decode_io_writer[1]; + } private_data; + +#else // WUFFS_IMPLEMENTATION + + // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is + // large enough to discourage trying to allocate one on the stack. The sizeof + // the real private_impl (and the sizeof the real outermost wuffs_foo__bar + // struct) is not part of the public, stable, memory-safe API. Call + // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their + // first argument) instead of fiddling with bar.private_impl.qux fields. + // + // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still + // defines C++ convenience methods. These methods forward on "this", so that + // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". + private: + union { + uint32_t align_as_per_magic_field; + uint8_t placeholder[1073741824]; // 1 GiB. + } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; + + public: + +#endif // WUFFS_IMPLEMENTATION + +#ifdef __cplusplus + + inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // + initialize(size_t sizeof_star_self, + uint64_t wuffs_version, + uint32_t initialize_flags) { + return wuffs_gzip__decoder__initialize(this, sizeof_star_self, + wuffs_version, initialize_flags); + } + + inline wuffs_base__empty_struct // + set_ignore_checksum(bool a_ic) { + return wuffs_gzip__decoder__set_ignore_checksum(this, a_ic); + } + + inline wuffs_base__range_ii_u64 // + workbuf_len() const { + return wuffs_gzip__decoder__workbuf_len(this); + } + + inline wuffs_base__status // + decode_io_writer(wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src, + wuffs_base__slice_u8 a_workbuf) { + return wuffs_gzip__decoder__decode_io_writer(this, a_dst, a_src, a_workbuf); + } + +#if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + // Disallow copy and assign. + wuffs_gzip__decoder__struct(const wuffs_gzip__decoder__struct&) = delete; + wuffs_gzip__decoder__struct& operator=(const wuffs_gzip__decoder__struct&) = + delete; +#endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + +#endif // __cplusplus + +}; // struct wuffs_gzip__decoder__struct + +#endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) + +#ifdef __cplusplus +} // extern "C" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// ---------------- Status Codes + +extern const char* wuffs_zlib__warning__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; + +// ---------------- Public Consts + +#define WUFFS_ZLIB__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1 + +// ---------------- Struct Declarations + +typedef struct wuffs_zlib__decoder__struct wuffs_zlib__decoder; + +// ---------------- 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 initialize_flags. + +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 initialize_flags); + +size_t // +sizeof__wuffs_zlib__decoder(); + +// ---------------- Public Function Prototypes + +WUFFS_BASE__MAYBE_STATIC uint32_t // +wuffs_zlib__decoder__dictionary_id(const wuffs_zlib__decoder* self); + +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__MAYBE_STATIC wuffs_base__empty_struct // +wuffs_zlib__decoder__set_ignore_checksum(wuffs_zlib__decoder* self, bool a_ic); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // +wuffs_zlib__decoder__workbuf_len(const wuffs_zlib__decoder* self); + +WUFFS_BASE__MAYBE_STATIC wuffs_base__status // +wuffs_zlib__decoder__decode_io_writer(wuffs_zlib__decoder* self, + wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src, + wuffs_base__slice_u8 a_workbuf); + +// ---------------- 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 { +#ifdef WUFFS_IMPLEMENTATION + + // 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; + + bool f_bad_call_sequence; + bool f_header_complete; + bool f_got_dictionary; + bool f_want_dictionary; + bool f_ignore_checksum; + uint32_t f_dict_id_got; + uint32_t f_dict_id_want; + + uint32_t p_decode_io_writer[1]; + } 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_got; + uint64_t scratch; + } s_decode_io_writer[1]; + } private_data; + +#else // WUFFS_IMPLEMENTATION + + // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is + // large enough to discourage trying to allocate one on the stack. The sizeof + // the real private_impl (and the sizeof the real outermost wuffs_foo__bar + // struct) is not part of the public, stable, memory-safe API. Call + // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their + // first argument) instead of fiddling with bar.private_impl.qux fields. + // + // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still + // defines C++ convenience methods. These methods forward on "this", so that + // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". + private: + union { + uint32_t align_as_per_magic_field; + uint8_t placeholder[1073741824]; // 1 GiB. + } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; + + public: + +#endif // WUFFS_IMPLEMENTATION + +#ifdef __cplusplus + + inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // + initialize(size_t sizeof_star_self, + uint64_t wuffs_version, + uint32_t initialize_flags) { + return wuffs_zlib__decoder__initialize(this, sizeof_star_self, + wuffs_version, initialize_flags); + } + + 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 wuffs_base__empty_struct // + set_ignore_checksum(bool a_ic) { + return wuffs_zlib__decoder__set_ignore_checksum(this, a_ic); + } + + inline wuffs_base__range_ii_u64 // + workbuf_len() const { + return wuffs_zlib__decoder__workbuf_len(this); + } + + inline wuffs_base__status // + decode_io_writer(wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src, + wuffs_base__slice_u8 a_workbuf) { + return wuffs_zlib__decoder__decode_io_writer(this, a_dst, a_src, a_workbuf); + } + +#if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + // Disallow copy and assign. + wuffs_zlib__decoder__struct(const wuffs_zlib__decoder__struct&) = delete; + wuffs_zlib__decoder__struct& operator=(const wuffs_zlib__decoder__struct&) = + delete; +#endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) + +#endif // __cplusplus + +}; // struct wuffs_zlib__decoder__struct + +#endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) + +#ifdef __cplusplus +} // extern "C" +#endif + +// WUFFS C HEADER ENDS HERE. +#ifdef WUFFS_IMPLEMENTATION + +// GCC does not warn for unused *static inline* functions, but clang does. +#ifdef __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wunused-function" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +static inline wuffs_base__empty_struct // +wuffs_base__ignore_status(wuffs_base__status z) { + return wuffs_base__make_empty_struct(); +} + +// 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) + +// Denote intentional fallthroughs for -Wimplicit-fallthrough. +// +// The order matters here. Clang also defines "__GNUC__". +#if defined(__clang__) && defined(__cplusplus) && (__cplusplus >= 201103L) +#define WUFFS_BASE__FALLTHROUGH [[clang::fallthrough]] +#elif !defined(__clang__) && defined(__GNUC__) && (__GNUC__ >= 7) +#define WUFFS_BASE__FALLTHROUGH __attribute__((fallthrough)) +#else +#define WUFFS_BASE__FALLTHROUGH +#endif + +// Use switch cases for coroutine suspension points, similar to the technique +// in https://www.chiark.greenend.org.uk/~sgtatham/coroutines.html +// +// 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; \ + WUFFS_BASE__FALLTHROUGH; \ + case n:; + +#define WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(n) \ + if (!status) { \ + goto ok; \ + } else if (*status != '$') { \ + goto exit; \ + } \ + coro_susp_point = n; \ + goto suspend; \ + case n:; + +// Clang also defines "__GNUC__". +#if defined(__GNUC__) +#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 + +// 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. + +// ---------------- Numeric Types + +static inline uint8_t // +wuffs_base__load_u8be(uint8_t* p) { + return p[0]; +} + +static inline uint16_t // +wuffs_base__load_u16be(uint8_t* p) { + return (uint16_t)(((uint16_t)(p[0]) << 8) | ((uint16_t)(p[1]) << 0)); +} + +static inline uint16_t // +wuffs_base__load_u16le(uint8_t* p) { + return (uint16_t)(((uint16_t)(p[0]) << 0) | ((uint16_t)(p[1]) << 8)); +} + +static inline uint32_t // +wuffs_base__load_u24be(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__load_u24le(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__load_u32be(uint8_t* p) { + return ((uint32_t)(p[0]) << 24) | ((uint32_t)(p[1]) << 16) | + ((uint32_t)(p[2]) << 8) | ((uint32_t)(p[3]) << 0); +} + +static inline uint32_t // +wuffs_base__load_u32le(uint8_t* p) { + return ((uint32_t)(p[0]) << 0) | ((uint32_t)(p[1]) << 8) | + ((uint32_t)(p[2]) << 16) | ((uint32_t)(p[3]) << 24); +} + +static inline uint64_t // +wuffs_base__load_u40be(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__load_u40le(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__load_u48be(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__load_u48le(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__load_u56be(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__load_u56le(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__load_u64be(uint8_t* p) { + 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); +} + +static inline uint64_t // +wuffs_base__load_u64le(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) | ((uint64_t)(p[7]) << 56); +} + +// -------- + +static inline void // +wuffs_base__store_u8be(uint8_t* p, uint8_t x) { + p[0] = x; +} + +static inline void // +wuffs_base__store_u16be(uint8_t* p, uint16_t x) { + p[0] = (uint8_t)(x >> 8); + p[1] = (uint8_t)(x >> 0); +} + +static inline void // +wuffs_base__store_u16le(uint8_t* p, uint16_t x) { + p[0] = (uint8_t)(x >> 0); + p[1] = (uint8_t)(x >> 8); +} + +static inline void // +wuffs_base__store_u24be(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__store_u24le(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__store_u32be(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__store_u32le(uint8_t* p, uint32_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); +} + +static inline void // +wuffs_base__store_u40be(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__store_u40le(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__store_u48be(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__store_u48le(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__store_u56be(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__store_u56le(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__store_u64be(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__store_u64le(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); + p[7] = (uint8_t)(x >> 56); +} + +// -------- + +extern const uint8_t wuffs_base__low_bits_mask__u8[9]; +extern const uint16_t wuffs_base__low_bits_mask__u16[17]; +extern const uint32_t wuffs_base__low_bits_mask__u32[33]; +extern const uint64_t wuffs_base__low_bits_mask__u64[65]; + +#define WUFFS_BASE__LOW_BITS_MASK__U8(n) (wuffs_base__low_bits_mask__u8[n]) +#define WUFFS_BASE__LOW_BITS_MASK__U16(n) (wuffs_base__low_bits_mask__u16[n]) +#define WUFFS_BASE__LOW_BITS_MASK__U32(n) (wuffs_base__low_bits_mask__u32[n]) +#define WUFFS_BASE__LOW_BITS_MASK__U64(n) (wuffs_base__low_bits_mask__u64[n]) + +// -------- + +static inline void // +wuffs_base__u8__sat_add_indirect(uint8_t* x, uint8_t y) { + *x = wuffs_base__u8__sat_add(*x, y); +} + +static inline void // +wuffs_base__u8__sat_sub_indirect(uint8_t* x, uint8_t y) { + *x = wuffs_base__u8__sat_sub(*x, y); +} + +static inline void // +wuffs_base__u16__sat_add_indirect(uint16_t* x, uint16_t y) { + *x = wuffs_base__u16__sat_add(*x, y); +} + +static inline void // +wuffs_base__u16__sat_sub_indirect(uint16_t* x, uint16_t y) { + *x = wuffs_base__u16__sat_sub(*x, y); +} + +static inline void // +wuffs_base__u32__sat_add_indirect(uint32_t* x, uint32_t y) { + *x = wuffs_base__u32__sat_add(*x, y); +} + +static inline void // +wuffs_base__u32__sat_sub_indirect(uint32_t* x, uint32_t y) { + *x = wuffs_base__u32__sat_sub(*x, y); +} + +static inline void // +wuffs_base__u64__sat_add_indirect(uint64_t* x, uint64_t y) { + *x = wuffs_base__u64__sat_add(*x, y); +} + +static inline void // +wuffs_base__u64__sat_sub_indirect(uint64_t* x, uint64_t y) { + *x = wuffs_base__u64__sat_sub(*x, y); +} + +// ---------------- Slices and Tables + +// wuffs_base__slice_u8__prefix returns up to the first up_to bytes of s. +static inline wuffs_base__slice_u8 // +wuffs_base__slice_u8__prefix(wuffs_base__slice_u8 s, uint64_t up_to) { + if ((uint64_t)(s.len) > up_to) { + s.len = up_to; + } + return s; +} + +// wuffs_base__slice_u8__suffix returns up to the last up_to bytes of s. +static inline wuffs_base__slice_u8 // +wuffs_base__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 = up_to; + } + return s; +} + +// wuffs_base__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_base__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__slice_u8 // +wuffs_base__table_u8__row(wuffs_base__table_u8 t, uint32_t y) { + if (y < t.height) { + return wuffs_base__make_slice_u8(t.ptr + (t.stride * y), t.width); + } + return wuffs_base__make_slice_u8(NULL, 0); +} + + // ---------------- Slices and Tables (Utility) + +#define wuffs_base__utility__empty_slice_u8 wuffs_base__empty_slice_u8 + +// ---------------- Ranges and Rects + +static inline uint32_t // +wuffs_base__range_ii_u32__get_min_incl(const wuffs_base__range_ii_u32* r) { + return r->min_incl; +} + +static inline uint32_t // +wuffs_base__range_ii_u32__get_max_incl(const wuffs_base__range_ii_u32* r) { + return r->max_incl; +} + +static inline uint32_t // +wuffs_base__range_ie_u32__get_min_incl(const wuffs_base__range_ie_u32* r) { + return r->min_incl; +} + +static inline uint32_t // +wuffs_base__range_ie_u32__get_max_excl(const wuffs_base__range_ie_u32* r) { + return r->max_excl; +} + +static inline uint64_t // +wuffs_base__range_ii_u64__get_min_incl(const wuffs_base__range_ii_u64* r) { + return r->min_incl; +} + +static inline uint64_t // +wuffs_base__range_ii_u64__get_max_incl(const wuffs_base__range_ii_u64* r) { + return r->max_incl; +} + +static inline uint64_t // +wuffs_base__range_ie_u64__get_min_incl(const wuffs_base__range_ie_u64* r) { + return r->min_incl; +} + +static inline uint64_t // +wuffs_base__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__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_base__io__count_since(uint64_t mark, uint64_t index) { + if (index >= mark) { + return index - mark; + } + return 0; +} + +static inline wuffs_base__slice_u8 // +wuffs_base__io__since(uint64_t mark, uint64_t index, uint8_t* ptr) { + if (index >= mark) { + return wuffs_base__make_slice_u8(ptr + mark, index - mark); + } + return wuffs_base__make_slice_u8(NULL, 0); +} + +static inline uint32_t // +wuffs_base__io_writer__copy_n_from_history(uint8_t** ptr_iop_w, + uint8_t* io1_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 - io1_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 + // copy_n_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_base__io_writer__copy_n_from_history_fast below. + // + // Alternatively, or additionally, have a sloppy_copy_n_from_history method + // that copies 8 bytes at a time, possibly writing more than length bytes? + for (; n >= 3; n -= 3) { + *p++ = *q++; + *p++ = *q++; + *p++ = *q++; + } + for (; n; n--) { + *p++ = *q++; + } + *ptr_iop_w = p; + return length; +} + +// wuffs_base__io_writer__copy_n_from_history_fast is like the +// wuffs_base__io_writer__copy_n_from_history function above, but has stronger +// pre-conditions. The caller needs to prove that: +// - distance > 0 +// - distance <= (*ptr_iop_w - io1_w) +// - length <= (io2_w - *ptr_iop_w) +static inline uint32_t // +wuffs_base__io_writer__copy_n_from_history_fast(uint8_t** ptr_iop_w, + uint8_t* io1_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; +} + +static inline uint32_t // +wuffs_base__io_writer__copy_n_from_reader(uint8_t** ptr_iop_w, + uint8_t* io2_w, + uint32_t length, + uint8_t** ptr_iop_r, + 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); + } + 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 uint64_t // +wuffs_base__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 uint32_t // +wuffs_base__io_writer__copy_n_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_base__io_reader__set(wuffs_base__io_buffer* b, + uint8_t** ptr_iop_r, + uint8_t** ptr_io0_r, + uint8_t** ptr_io1_r, + uint8_t** ptr_io2_r, + wuffs_base__slice_u8 data) { + b->data = data; + b->meta.wi = data.len; + b->meta.ri = 0; + b->meta.pos = 0; + 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 wuffs_base__slice_u8 // +wuffs_base__io_reader__take(uint8_t** ptr_iop_r, uint8_t* io2_r, uint64_t n) { + if (n <= ((size_t)(io2_r - *ptr_iop_r))) { + uint8_t* p = *ptr_iop_r; + *ptr_iop_r += n; + return wuffs_base__make_slice_u8(p, n); + } + return wuffs_base__make_slice_u8(NULL, 0); +} + +static inline wuffs_base__io_buffer* // +wuffs_base__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) { + b->data = data; + b->meta.wi = 0; + b->meta.ri = 0; + b->meta.pos = 0; + 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 + + // ---------------- Memory Allocation + + // ---------------- Images + +#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE) + +const uint8_t wuffs_base__low_bits_mask__u8[9] = { + 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF, +}; + +const uint16_t wuffs_base__low_bits_mask__u16[17] = { + 0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F, 0x003F, 0x007F, 0x00FF, + 0x01FF, 0x03FF, 0x07FF, 0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF, +}; + +const uint32_t wuffs_base__low_bits_mask__u32[33] = { + 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, 0xFFFFFFFF, +}; + +const uint64_t wuffs_base__low_bits_mask__u64[65] = { + 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, 0xFFFFFFFFFFFFFFFF, +}; + +const char* wuffs_base__warning__end_of_data = "@base: end of data"; +const char* wuffs_base__warning__metadata_reported = "@base: metadata reported"; +const char* wuffs_base__suspension__short_read = "$base: short read"; +const char* wuffs_base__suspension__short_write = "$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_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_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_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__interleaved_coroutine_calls = + "#base: interleaved coroutine calls"; +const char* wuffs_base__error__not_enough_data = "#base: not enough data"; +const char* wuffs_base__error__unsupported_option = "#base: unsupported option"; +const char* wuffs_base__error__too_much_data = "#base: too much data"; + +// ---------------- Images + +const uint32_t wuffs_base__pixel_format__bits_per_channel[16] = { + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x0A, 0x0C, 0x10, 0x18, 0x20, 0x30, 0x40, +}; + +static uint64_t // +wuffs_base__pixel_swizzler__copy_1_1(wuffs_base__slice_u8 dst, + wuffs_base__slice_u8 dst_palette, + wuffs_base__slice_u8 src) { + return wuffs_base__slice_u8__copy_from_slice(dst, src); +} + +static uint64_t // +wuffs_base__pixel_swizzler__copy_3_1(wuffs_base__slice_u8 dst, + wuffs_base__slice_u8 dst_palette, + wuffs_base__slice_u8 src) { + if (dst_palette.len != 1024) { + 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; + uint8_t* s = src.ptr; + size_t n = len; + + // N is the loop unroll count. + const int N = 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 > N) { + wuffs_base__store_u32le( + d + (0 * 3), + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[0]) * 4))); + wuffs_base__store_u32le( + d + (1 * 3), + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[1]) * 4))); + wuffs_base__store_u32le( + d + (2 * 3), + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[2]) * 4))); + wuffs_base__store_u32le( + d + (3 * 3), + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[3]) * 4))); + + s += 1 * N; + d += 3 * N; + n -= (size_t)(1 * N); + } + + while (n >= 1) { + uint32_t color = + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[0]) * 4)); + d[0] = (uint8_t)(color >> 0); + d[1] = (uint8_t)(color >> 8); + d[2] = (uint8_t)(color >> 16); + + s += 1 * 1; + d += 3 * 1; + n -= (size_t)(1 * 1); + } + + return len; +} +static uint64_t // +wuffs_base__pixel_swizzler__copy_4_1(wuffs_base__slice_u8 dst, + wuffs_base__slice_u8 dst_palette, + wuffs_base__slice_u8 src) { + if (dst_palette.len != 1024) { + 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; + uint8_t* s = src.ptr; + size_t n = len; + + // N is the loop unroll count. + const int N = 4; + + while (n >= N) { + wuffs_base__store_u32le( + d + (0 * 4), + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[0]) * 4))); + wuffs_base__store_u32le( + d + (1 * 4), + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[1]) * 4))); + wuffs_base__store_u32le( + d + (2 * 4), + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[2]) * 4))); + wuffs_base__store_u32le( + d + (3 * 4), + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[3]) * 4))); + + s += 1 * N; + d += 4 * N; + n -= (size_t)(1 * N); + } + + while (n >= 1) { + wuffs_base__store_u32le( + d + (0 * 4), + wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[0]) * 4))); + + s += 1 * 1; + d += 4 * 1; + n -= (size_t)(1 * 1); + } + + return len; +} + +static uint64_t // +wuffs_base__pixel_swizzler__swap_rgbx_bgrx(wuffs_base__slice_u8 dst, + wuffs_base__slice_u8 src) { + size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4; + uint8_t* d = dst.ptr; + uint8_t* s = src.ptr; + + size_t n = len4; + while (n--) { + uint8_t b0 = s[0]; + uint8_t b1 = s[1]; + uint8_t b2 = s[2]; + uint8_t b3 = s[3]; + d[0] = b2; + d[1] = b1; + d[2] = b0; + d[3] = b3; + s += 4; + d += 4; + } + return len4 * 4; +} + +wuffs_base__status // +wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p, + wuffs_base__pixel_format dst_format, + wuffs_base__slice_u8 dst_palette, + wuffs_base__pixel_format src_format, + wuffs_base__slice_u8 src_palette) { + if (!p) { + return wuffs_base__error__bad_receiver; + } + + // TODO: support many more formats. + + uint64_t (*func)(wuffs_base__slice_u8 dst, wuffs_base__slice_u8 dst_palette, + wuffs_base__slice_u8 src) = NULL; + + switch (src_format) { + case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY: + switch (dst_format) { + 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_base__slice_u8__copy_from_slice(dst_palette, src_palette) != + 1024) { + break; + } + func = wuffs_base__pixel_swizzler__copy_1_1; + break; + case WUFFS_BASE__PIXEL_FORMAT__BGR: + if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) != + 1024) { + break; + } + func = wuffs_base__pixel_swizzler__copy_3_1; + break; + case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL: + case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL: + case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY: + if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) != + 1024) { + break; + } + func = wuffs_base__pixel_swizzler__copy_4_1; + break; + case WUFFS_BASE__PIXEL_FORMAT__RGB: + if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette, + src_palette) != 1024) { + break; + } + func = wuffs_base__pixel_swizzler__copy_3_1; + break; + case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL: + case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL: + case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY: + if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette, + src_palette) != 1024) { + break; + } + func = wuffs_base__pixel_swizzler__copy_4_1; + break; + default: + break; + } + break; + + default: + break; + } + + p->private_impl.func = func; + return func ? NULL : wuffs_base__error__unsupported_option; +} + +uint64_t // +wuffs_base__pixel_swizzler__swizzle_interleaved( + 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, dst_palette, src); + } + return 0; +} + +#endif // !defined(WUFFS_CONFIG__MODULES) || + // defined(WUFFS_CONFIG__MODULE__BASE) + +#ifdef __cplusplus +} // extern "C" +#endif + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ADLER32) + +// ---------------- Status Codes Implementations + +// ---------------- Private Consts + +// ---------------- Private Initializer Prototypes + +// ---------------- Private Function Prototypes + +// ---------------- 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 initialize_flags) { + if (!self) { + return wuffs_base__error__bad_receiver; + } + if (sizeof(*self) != sizeof_star_self) { + return wuffs_base__error__bad_sizeof_receiver; + } + if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || + (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { + return wuffs_base__error__bad_wuffs_version; + } + + if ((initialize_flags & 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__error__initialize_falsely_claimed_already_zeroed; + } +#if !defined(__clang__) && defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + } else { + if ((initialize_flags & + WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { + memset(self, 0, sizeof(*self)); + initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; + } else { + memset(&(self->private_impl), 0, sizeof(self->private_impl)); + } + } + + self->private_impl.magic = WUFFS_BASE__MAGIC; + return NULL; +} + +size_t // +sizeof__wuffs_adler32__hasher() { + return sizeof(wuffs_adler32__hasher); +} + +// ---------------- Function Implementations + +// -------- func adler32.hasher.update_u32 + +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; + } + + uint32_t v_s1 = 0; + uint32_t v_s2 = 0; + wuffs_base__slice_u8 v_remaining = {0}; + wuffs_base__slice_u8 v_p = {0}; + + if (!self->private_impl.f_started) { + self->private_impl.f_started = true; + self->private_impl.f_state = 1; + } + v_s1 = ((self->private_impl.f_state) & 0xFFFF); + v_s2 = ((self->private_impl.f_state) >> (32 - (16))); + while (((uint64_t)(a_x.len)) > 0) { + v_remaining = wuffs_base__slice_u8__subslice_j(a_x, 0); + if (((uint64_t)(a_x.len)) > 5552) { + v_remaining = wuffs_base__slice_u8__subslice_i(a_x, 5552); + a_x = wuffs_base__slice_u8__subslice_j(a_x, 5552); + } + { + wuffs_base__slice_u8 i_slice_p = a_x; + v_p = i_slice_p; + v_p.len = 1; + uint8_t* i_end0_p = i_slice_p.ptr + (i_slice_p.len / 8) * 8; + while (v_p.ptr < i_end0_p) { + v_s1 += ((uint32_t)(v_p.ptr[0])); + v_s2 += v_s1; + v_p.ptr += 1; + v_s1 += ((uint32_t)(v_p.ptr[0])); + v_s2 += v_s1; + v_p.ptr += 1; + v_s1 += ((uint32_t)(v_p.ptr[0])); + v_s2 += v_s1; + v_p.ptr += 1; + v_s1 += ((uint32_t)(v_p.ptr[0])); + v_s2 += v_s1; + v_p.ptr += 1; + v_s1 += ((uint32_t)(v_p.ptr[0])); + v_s2 += v_s1; + v_p.ptr += 1; + v_s1 += ((uint32_t)(v_p.ptr[0])); + v_s2 += v_s1; + v_p.ptr += 1; + v_s1 += ((uint32_t)(v_p.ptr[0])); + v_s2 += v_s1; + v_p.ptr += 1; + v_s1 += ((uint32_t)(v_p.ptr[0])); + v_s2 += v_s1; + v_p.ptr += 1; + } + v_p.len = 1; + uint8_t* i_end1_p = i_slice_p.ptr + (i_slice_p.len / 1) * 1; + while (v_p.ptr < i_end1_p) { + v_s1 += ((uint32_t)(v_p.ptr[0])); + v_s2 += v_s1; + v_p.ptr += 1; + } + } + v_s1 %= 65521; + v_s2 %= 65521; + a_x = v_remaining; + } + self->private_impl.f_state = (((v_s2 & 65535) << 16) | (v_s1 & 65535)); + return self->private_impl.f_state; +} + +#endif // !defined(WUFFS_CONFIG__MODULES) || + // defined(WUFFS_CONFIG__MODULE__ADLER32) + +#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 = { + { + 0, 1996959894, 3993919788, 2567524794, 124634137, + 1886057615, 3915621685, 2657392035, 249268274, 2044508324, + 3772115230, 2547177864, 162941995, 2125561021, 3887607047, + 2428444049, 498536548, 1789927666, 4089016648, 2227061214, + 450548861, 1843258603, 4107580753, 2211677639, 325883990, + 1684777152, 4251122042, 2321926636, 335633487, 1661365465, + 4195302755, 2366115317, 997073096, 1281953886, 3579855332, + 2724688242, 1006888145, 1258607687, 3524101629, 2768942443, + 901097722, 1119000684, 3686517206, 2898065728, 853044451, + 1172266101, 3705015759, 2882616665, 651767980, 1373503546, + 3369554304, 3218104598, 565507253, 1454621731, 3485111705, + 3099436303, 671266974, 1594198024, 3322730930, 2970347812, + 795835527, 1483230225, 3244367275, 3060149565, 1994146192, + 31158534, 2563907772, 4023717930, 1907459465, 112637215, + 2680153253, 3904427059, 2013776290, 251722036, 2517215374, + 3775830040, 2137656763, 141376813, 2439277719, 3865271297, + 1802195444, 476864866, 2238001368, 4066508878, 1812370925, + 453092731, 2181625025, 4111451223, 1706088902, 314042704, + 2344532202, 4240017532, 1658658271, 366619977, 2362670323, + 4224994405, 1303535960, 984961486, 2747007092, 3569037538, + 1256170817, 1037604311, 2765210733, 3554079995, 1131014506, + 879679996, 2909243462, 3663771856, 1141124467, 855842277, + 2852801631, 3708648649, 1342533948, 654459306, 3188396048, + 3373015174, 1466479909, 544179635, 3110523913, 3462522015, + 1591671054, 702138776, 2966460450, 3352799412, 1504918807, + 783551873, 3082640443, 3233442989, 3988292384, 2596254646, + 62317068, 1957810842, 3939845945, 2647816111, 81470997, + 1943803523, 3814918930, 2489596804, 225274430, 2053790376, + 3826175755, 2466906013, 167816743, 2097651377, 4027552580, + 2265490386, 503444072, 1762050814, 4150417245, 2154129355, + 426522225, 1852507879, 4275313526, 2312317920, 282753626, + 1742555852, 4189708143, 2394877945, 397917763, 1622183637, + 3604390888, 2714866558, 953729732, 1340076626, 3518719985, + 2797360999, 1068828381, 1219638859, 3624741850, 2936675148, + 906185462, 1090812512, 3747672003, 2825379669, 829329135, + 1181335161, 3412177804, 3160834842, 628085408, 1382605366, + 3423369109, 3138078467, 570562233, 1426400815, 3317316542, + 2998733608, 733239954, 1555261956, 3268935591, 3050360625, + 752459403, 1541320221, 2607071920, 3965973030, 1969922972, + 40735498, 2617837225, 3943577151, 1913087877, 83908371, + 2512341634, 3803740692, 2075208622, 213261112, 2463272603, + 3855990285, 2094854071, 198958881, 2262029012, 4057260610, + 1759359992, 534414190, 2176718541, 4139329115, 1873836001, + 414664567, 2282248934, 4279200368, 1711684554, 285281116, + 2405801727, 4167216745, 1634467795, 376229701, 2685067896, + 3608007406, 1308918612, 956543938, 2808555105, 3495958263, + 1231636301, 1047427035, 2932959818, 3654703836, 1088359270, + 936918000, 2847714899, 3736837829, 1202900863, 817233897, + 3183342108, 3401237130, 1404277552, 615818150, 3134207493, + 3453421203, 1423857449, 601450431, 3009837614, 3294710456, + 1567103746, 711928724, 3020668471, 3272380065, 1510334235, + 755167117, + }, + { + 0, 421212481, 842424962, 724390851, 1684849924, + 2105013317, 1448781702, 1329698503, 3369699848, 3519200073, + 4210026634, 3824474571, 2897563404, 3048111693, 2659397006, + 2274893007, 1254232657, 1406739216, 2029285587, 1643069842, + 783210325, 934667796, 479770071, 92505238, 2182846553, + 2600511768, 2955803355, 2838940570, 3866582365, 4285295644, + 3561045983, 3445231262, 2508465314, 2359236067, 2813478432, + 3198777185, 4058571174, 3908292839, 3286139684, 3670389349, + 1566420650, 1145479147, 1869335592, 1987116393, 959540142, + 539646703, 185010476, 303839341, 3745920755, 3327985586, + 3983561841, 4100678960, 3140154359, 2721170102, 2300350837, + 2416418868, 396344571, 243568058, 631889529, 1018359608, + 1945336319, 1793607870, 1103436669, 1490954812, 4034481925, + 3915546180, 3259968903, 3679722694, 2484439553, 2366552896, + 2787371139, 3208174018, 950060301, 565965900, 177645455, + 328046286, 1556873225, 1171730760, 1861902987, 2011255754, + 3132841300, 2745199637, 2290958294, 2442530455, 3738671184, + 3352078609, 3974232786, 4126854035, 1919080284, 1803150877, + 1079293406, 1498383519, 370020952, 253043481, 607678682, + 1025720731, 1711106983, 2095471334, 1472923941, 1322268772, + 26324643, 411738082, 866634785, 717028704, 2904875439, + 3024081134, 2668790573, 2248782444, 3376948395, 3495106026, + 4219356713, 3798300520, 792689142, 908347575, 487136116, + 68299317, 1263779058, 1380486579, 2036719216, 1618931505, + 3890672638, 4278043327, 3587215740, 3435896893, 2206873338, + 2593195963, 2981909624, 2829542713, 998479947, 580430090, + 162921161, 279890824, 1609522511, 1190423566, 1842954189, + 1958874764, 4082766403, 3930137346, 3245109441, 3631694208, + 2536953671, 2385372678, 2768287173, 3155920004, 1900120602, + 1750776667, 1131931800, 1517083097, 355290910, 204897887, + 656092572, 1040194781, 3113746450, 2692952403, 2343461520, + 2461357009, 3723805974, 3304059991, 4022511508, 4141455061, + 2919742697, 3072101800, 2620513899, 2234183466, 3396041197, + 3547351212, 4166851439, 3779471918, 1725839073, 2143618976, + 1424512099, 1307796770, 45282277, 464110244, 813994343, + 698327078, 3838160568, 4259225593, 3606301754, 3488152955, + 2158586812, 2578602749, 2996767038, 2877569151, 740041904, + 889656817, 506086962, 120682355, 1215357364, 1366020341, + 2051441462, 1667084919, 3422213966, 3538019855, 4190942668, + 3772220557, 2945847882, 3062702859, 2644537544, 2226864521, + 52649286, 439905287, 823476164, 672009861, 1733269570, + 2119477507, 1434057408, 1281543041, 2167981343, 2552493150, + 3004082077, 2853541596, 3847487515, 4233048410, 3613549209, + 3464057816, 1239502615, 1358593622, 2077699477, 1657543892, + 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2857626143, 1470763626, + 4190274555, 3490330377, 2120394392, 4035494306, 1591758899, + 1999168705, 3644880208, 616140069, 2328960180, 2736367686, + 225524183, + }, +}; + +// ---------------- Private Initializer Prototypes + +// ---------------- Private Function Prototypes + +// ---------------- 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 initialize_flags) { + if (!self) { + return wuffs_base__error__bad_receiver; + } + if (sizeof(*self) != sizeof_star_self) { + return wuffs_base__error__bad_sizeof_receiver; + } + if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || + (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { + return wuffs_base__error__bad_wuffs_version; + } + + if ((initialize_flags & 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__error__initialize_falsely_claimed_already_zeroed; + } +#if !defined(__clang__) && defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + } else { + if ((initialize_flags & + WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { + memset(self, 0, sizeof(*self)); + initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; + } else { + memset(&(self->private_impl), 0, sizeof(self->private_impl)); + } + } + + self->private_impl.magic = WUFFS_BASE__MAGIC; + return NULL; +} + +size_t // +sizeof__wuffs_crc32__ieee_hasher() { + return sizeof(wuffs_crc32__ieee_hasher); +} + +// ---------------- Function Implementations + +// -------- func crc32.ieee_hasher.update_u32 + +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; + } + + uint32_t v_s = 0; + wuffs_base__slice_u8 v_p = {0}; + + v_s = (4294967295 ^ self->private_impl.f_state); + { + wuffs_base__slice_u8 i_slice_p = a_x; + v_p = i_slice_p; + v_p.len = 16; + uint8_t* i_end0_p = i_slice_p.ptr + (i_slice_p.len / 32) * 32; + while (v_p.ptr < i_end0_p) { + v_s ^= + ((((uint32_t)(v_p.ptr[0])) << 0) | (((uint32_t)(v_p.ptr[1])) << 8) | + (((uint32_t)(v_p.ptr[2])) << 16) | (((uint32_t)(v_p.ptr[3])) << 24)); + v_s = (wuffs_crc32__ieee_table[0][v_p.ptr[15]] ^ + wuffs_crc32__ieee_table[1][v_p.ptr[14]] ^ + wuffs_crc32__ieee_table[2][v_p.ptr[13]] ^ + wuffs_crc32__ieee_table[3][v_p.ptr[12]] ^ + wuffs_crc32__ieee_table[4][v_p.ptr[11]] ^ + wuffs_crc32__ieee_table[5][v_p.ptr[10]] ^ + wuffs_crc32__ieee_table[6][v_p.ptr[9]] ^ + wuffs_crc32__ieee_table[7][v_p.ptr[8]] ^ + wuffs_crc32__ieee_table[8][v_p.ptr[7]] ^ + wuffs_crc32__ieee_table[9][v_p.ptr[6]] ^ + wuffs_crc32__ieee_table[10][v_p.ptr[5]] ^ + wuffs_crc32__ieee_table[11][v_p.ptr[4]] ^ + wuffs_crc32__ieee_table[12][(255 & (v_s >> 24))] ^ + wuffs_crc32__ieee_table[13][(255 & (v_s >> 16))] ^ + wuffs_crc32__ieee_table[14][(255 & (v_s >> 8))] ^ + wuffs_crc32__ieee_table[15][(255 & (v_s >> 0))]); + v_p.ptr += 16; + v_s ^= + ((((uint32_t)(v_p.ptr[0])) << 0) | (((uint32_t)(v_p.ptr[1])) << 8) | + (((uint32_t)(v_p.ptr[2])) << 16) | (((uint32_t)(v_p.ptr[3])) << 24)); + v_s = (wuffs_crc32__ieee_table[0][v_p.ptr[15]] ^ + wuffs_crc32__ieee_table[1][v_p.ptr[14]] ^ + wuffs_crc32__ieee_table[2][v_p.ptr[13]] ^ + wuffs_crc32__ieee_table[3][v_p.ptr[12]] ^ + wuffs_crc32__ieee_table[4][v_p.ptr[11]] ^ + wuffs_crc32__ieee_table[5][v_p.ptr[10]] ^ + wuffs_crc32__ieee_table[6][v_p.ptr[9]] ^ + wuffs_crc32__ieee_table[7][v_p.ptr[8]] ^ + wuffs_crc32__ieee_table[8][v_p.ptr[7]] ^ + wuffs_crc32__ieee_table[9][v_p.ptr[6]] ^ + wuffs_crc32__ieee_table[10][v_p.ptr[5]] ^ + wuffs_crc32__ieee_table[11][v_p.ptr[4]] ^ + wuffs_crc32__ieee_table[12][(255 & (v_s >> 24))] ^ + wuffs_crc32__ieee_table[13][(255 & (v_s >> 16))] ^ + wuffs_crc32__ieee_table[14][(255 & (v_s >> 8))] ^ + wuffs_crc32__ieee_table[15][(255 & (v_s >> 0))]); + v_p.ptr += 16; + } + v_p.len = 16; + uint8_t* i_end1_p = i_slice_p.ptr + (i_slice_p.len / 16) * 16; + while (v_p.ptr < i_end1_p) { + v_s ^= + ((((uint32_t)(v_p.ptr[0])) << 0) | (((uint32_t)(v_p.ptr[1])) << 8) | + (((uint32_t)(v_p.ptr[2])) << 16) | (((uint32_t)(v_p.ptr[3])) << 24)); + v_s = (wuffs_crc32__ieee_table[0][v_p.ptr[15]] ^ + wuffs_crc32__ieee_table[1][v_p.ptr[14]] ^ + wuffs_crc32__ieee_table[2][v_p.ptr[13]] ^ + wuffs_crc32__ieee_table[3][v_p.ptr[12]] ^ + wuffs_crc32__ieee_table[4][v_p.ptr[11]] ^ + wuffs_crc32__ieee_table[5][v_p.ptr[10]] ^ + wuffs_crc32__ieee_table[6][v_p.ptr[9]] ^ + wuffs_crc32__ieee_table[7][v_p.ptr[8]] ^ + wuffs_crc32__ieee_table[8][v_p.ptr[7]] ^ + wuffs_crc32__ieee_table[9][v_p.ptr[6]] ^ + wuffs_crc32__ieee_table[10][v_p.ptr[5]] ^ + wuffs_crc32__ieee_table[11][v_p.ptr[4]] ^ + wuffs_crc32__ieee_table[12][(255 & (v_s >> 24))] ^ + wuffs_crc32__ieee_table[13][(255 & (v_s >> 16))] ^ + wuffs_crc32__ieee_table[14][(255 & (v_s >> 8))] ^ + wuffs_crc32__ieee_table[15][(255 & (v_s >> 0))]); + v_p.ptr += 16; + } + v_p.len = 1; + uint8_t* i_end2_p = i_slice_p.ptr + (i_slice_p.len / 1) * 1; + while (v_p.ptr < i_end2_p) { + v_s = + (wuffs_crc32__ieee_table[0][(((uint8_t)((v_s & 255))) ^ v_p.ptr[0])] ^ + (v_s >> 8)); + v_p.ptr += 1; + } + } + self->private_impl.f_state = (4294967295 ^ v_s); + return self->private_impl.f_state; +} + +#endif // !defined(WUFFS_CONFIG__MODULES) || + // defined(WUFFS_CONFIG__MODULE__CRC32) + +#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__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 = { + 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15, +}; + +static const uint8_t // + wuffs_deflate__reverse8[256] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, + 112, 240, 8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, + 56, 184, 120, 248, 4, 132, 68, 196, 36, 164, 100, 228, 20, 148, + 84, 212, 52, 180, 116, 244, 12, 140, 76, 204, 44, 172, 108, 236, + 28, 156, 92, 220, 60, 188, 124, 252, 2, 130, 66, 194, 34, 162, + 98, 226, 18, 146, 82, 210, 50, 178, 114, 242, 10, 138, 74, 202, + 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250, 6, 134, + 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246, + 14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, + 126, 254, 1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, + 49, 177, 113, 241, 9, 137, 73, 201, 41, 169, 105, 233, 25, 153, + 89, 217, 57, 185, 121, 249, 5, 133, 69, 197, 37, 165, 101, 229, + 21, 149, 85, 213, 53, 181, 117, 245, 13, 141, 77, 205, 45, 173, + 109, 237, 29, 157, 93, 221, 61, 189, 125, 253, 3, 131, 67, 195, + 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243, 11, 139, + 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251, + 7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, + 119, 247, 15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, + 63, 191, 127, 255, +}; + +static const uint32_t // + wuffs_deflate__lcode_magic_numbers[32] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 1073741824, 1073742080, 1073742336, 1073742592, 1073742848, 1073743104, + 1073743360, 1073743616, 1073743888, 1073744400, 1073744912, 1073745424, + 1073745952, 1073746976, 1073748000, 1073749024, 1073750064, 1073752112, + 1073754160, 1073756208, 1073758272, 1073762368, 1073766464, 1073770560, + 1073774672, 1073782864, 1073791056, 1073799248, 1073807104, 134217728, + 134217728, 134217728, +}; + +static const uint32_t // + wuffs_deflate__dcode_magic_numbers[32] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 1073741824, 1073742080, 1073742336, 1073742592, 1073742864, 1073743376, + 1073743904, 1073744928, 1073745968, 1073748016, 1073750080, 1073754176, + 1073758288, 1073766480, 1073774688, 1073791072, 1073807472, 1073840240, + 1073873024, 1073938560, 1074004112, 1074135184, 1074266272, 1074528416, + 1074790576, 1075314864, 1075839168, 1076887744, 1077936336, 1080033488, + 134217728, 134217728, +}; + +#define WUFFS_DEFLATE__HUFFS_TABLE_SIZE 1024 + +#define WUFFS_DEFLATE__HUFFS_TABLE_MASK 1023 + +// ---------------- Private Initializer Prototypes + +// ---------------- Private Function Prototypes + +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); + +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); + +static wuffs_base__status // +wuffs_deflate__decoder__init_fixed_huffman(wuffs_deflate__decoder* self); + +static wuffs_base__status // +wuffs_deflate__decoder__init_dynamic_huffman(wuffs_deflate__decoder* self, + wuffs_base__io_buffer* a_src); + +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); + +static wuffs_base__status // +wuffs_deflate__decoder__decode_huffman_fast(wuffs_deflate__decoder* self, + wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src); + +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); + +// ---------------- 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 initialize_flags) { + if (!self) { + return wuffs_base__error__bad_receiver; + } + if (sizeof(*self) != sizeof_star_self) { + return wuffs_base__error__bad_sizeof_receiver; + } + if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || + (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { + return wuffs_base__error__bad_wuffs_version; + } + + if ((initialize_flags & 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__error__initialize_falsely_claimed_already_zeroed; + } +#if !defined(__clang__) && defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + } else { + if ((initialize_flags & + WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { + memset(self, 0, sizeof(*self)); + initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; + } else { + memset(&(self->private_impl), 0, sizeof(self->private_impl)); + } + } + + self->private_impl.magic = WUFFS_BASE__MAGIC; + return NULL; +} + +size_t // +sizeof__wuffs_deflate__decoder() { + return sizeof(wuffs_deflate__decoder); +} + +// ---------------- Function Implementations + +// -------- func deflate.decoder.add_history + +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)) >= 32768) { + v_s = wuffs_base__slice_u8__suffix(v_s, 32768); + wuffs_base__slice_u8__copy_from_slice( + wuffs_base__make_slice_u8(self->private_data.f_history, 32768), v_s); + self->private_impl.f_history_index = 32768; + } else { + v_n_copied = wuffs_base__slice_u8__copy_from_slice( + wuffs_base__slice_u8__subslice_i( + wuffs_base__make_slice_u8(self->private_data.f_history, 32768), + (self->private_impl.f_history_index & 32767)), + 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_base__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 & 32767))) + 32768); + } else { + v_already_full = 0; + if (self->private_impl.f_history_index >= 32768) { + v_already_full = 32768; + } + self->private_impl.f_history_index = + ((self->private_impl.f_history_index & 32767) + + ((uint32_t)((v_n_copied & 32767))) + v_already_full); + } + } + return wuffs_base__make_empty_struct(); +} + +// -------- func deflate.decoder.workbuf_len + +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__make_range_ii_u64(0, 0); + } + if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && + (self->private_impl.magic != WUFFS_BASE__DISABLED)) { + return wuffs_base__utility__make_range_ii_u64(0, 0); + } + + return wuffs_base__utility__make_range_ii_u64(1, 1); +} + +// -------- func deflate.decoder.decode_io_writer + +WUFFS_BASE__MAYBE_STATIC wuffs_base__status // +wuffs_deflate__decoder__decode_io_writer(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__error__bad_receiver; + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return (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__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__error__interleaved_coroutine_calls; + } + self->private_impl.active_coroutine = 0; + wuffs_base__status status = NULL; + + uint64_t v_mark = 0; + wuffs_base__status v_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) { + 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_decode_io_writer[0]; + if (coro_susp_point) { + } + 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_deflate__decoder__decode_blocks(self, a_dst, a_src); + if (a_dst) { + iop_a_dst = a_dst->data.ptr + a_dst->meta.wi; + } + v_status = t_0; + } + 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__error__cannot_return_a_suspension; + goto exit; + } + goto ok; + } + wuffs_deflate__decoder__add_history( + self, wuffs_base__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); + } + + goto ok; + ok: + self->private_impl.p_decode_io_writer[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_io_writer[0] = + 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->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 deflate.decoder.decode_blocks + +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 = NULL; + + uint32_t v_final = 0; + uint32_t v_b0 = 0; + uint32_t v_type = 0; + wuffs_base__status v_status = NULL; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + v_final = self->private_data.s_decode_blocks[0].v_final; + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + label_0_continue:; + while (v_final == 0) { + while (self->private_impl.f_n_bits < 3) { + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + 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); + self->private_impl.f_n_bits += 8; + } + v_final = (self->private_impl.f_bits & 1); + v_type = ((self->private_impl.f_bits >> 1) & 3); + self->private_impl.f_bits >>= 3; + self->private_impl.f_n_bits -= 3; + if (v_type == 0) { + 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) { + goto suspend; + } + goto label_0_continue; + } else if (v_type == 1) { + 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__error__cannot_return_a_suspension; + goto exit; + } + goto ok; + } + } else if (v_type == 2) { + 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) { + goto suspend; + } + } else { + status = wuffs_deflate__error__bad_block; + goto exit; + } + self->private_impl.f_end_of_block = false; + while (true) { + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + v_status = + wuffs_deflate__decoder__decode_huffman_fast(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_0_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) { + goto suspend; + } + if (self->private_impl.f_end_of_block) { + goto label_0_continue; + } + } + } + + goto ok; + ok: + self->private_impl.p_decode_blocks[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_blocks[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + self->private_data.s_decode_blocks[0].v_final = v_final; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func deflate.decoder.decode_uncompressed + +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 = 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) { + 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; + } + } + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + v_length = self->private_data.s_decode_uncompressed[0].v_length; + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + if ((self->private_impl.f_n_bits >= 8) || + ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7)) != + 0)) { + status = wuffs_deflate__error__internal_error_inconsistent_n_bits; + goto exit; + } + self->private_impl.f_n_bits = 0; + self->private_impl.f_bits = 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__load_u32le(iop_a_src); + iop_a_src += 4; + } else { + self->private_data.s_decode_uncompressed[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = + &self->private_data.s_decode_uncompressed[0].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 += 8; + *scratch |= ((uint64_t)(num_bits_0)) << 56; + } + } + v_length = t_0; + } + if ((((v_length)&0xFFFF) + ((v_length) >> (32 - (16)))) != 65535) { + status = wuffs_deflate__error__inconsistent_stored_block_length; + goto exit; + } + v_length = ((v_length)&0xFFFF); + while (true) { + v_n_copied = wuffs_base__io_writer__copy_n_from_reader( + &iop_a_dst, io2_a_dst, v_length, &iop_a_src, io2_a_src); + if (v_length <= v_n_copied) { + status = NULL; + goto ok; + } + v_length -= v_n_copied; + if (((uint64_t)(io2_a_dst - iop_a_dst)) == 0) { + status = wuffs_base__suspension__short_write; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3); + } else { + status = wuffs_base__suspension__short_read; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4); + } + } + + goto ok; + ok: + self->private_impl.p_decode_uncompressed[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_uncompressed[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + self->private_data.s_decode_uncompressed[0].v_length = v_length; + + goto exit; +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)); + } + + return status; +} + +// -------- func deflate.decoder.init_fixed_huffman + +static wuffs_base__status // +wuffs_deflate__decoder__init_fixed_huffman(wuffs_deflate__decoder* self) { + uint32_t v_i = 0; + wuffs_base__status v_status = NULL; + + while (v_i < 144) { + self->private_data.f_code_lengths[v_i] = 8; + v_i += 1; + } + while (v_i < 256) { + self->private_data.f_code_lengths[v_i] = 9; + v_i += 1; + } + while (v_i < 280) { + self->private_data.f_code_lengths[v_i] = 7; + v_i += 1; + } + while (v_i < 288) { + self->private_data.f_code_lengths[v_i] = 8; + v_i += 1; + } + while (v_i < 320) { + self->private_data.f_code_lengths[v_i] = 5; + v_i += 1; + } + v_status = wuffs_deflate__decoder__init_huff(self, 0, 0, 288, 257); + if (wuffs_base__status__is_error(v_status)) { + return v_status; + } + v_status = wuffs_deflate__decoder__init_huff(self, 1, 288, 320, 0); + if (wuffs_base__status__is_error(v_status)) { + return v_status; + } + return NULL; +} + +// -------- func deflate.decoder.init_dynamic_huffman + +static wuffs_base__status // +wuffs_deflate__decoder__init_dynamic_huffman(wuffs_deflate__decoder* self, + wuffs_base__io_buffer* a_src) { + wuffs_base__status 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 = 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; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + v_bits = self->private_data.s_init_dynamic_huffman[0].v_bits; + v_n_bits = self->private_data.s_init_dynamic_huffman[0].v_n_bits; + v_n_lit = self->private_data.s_init_dynamic_huffman[0].v_n_lit; + v_n_dist = self->private_data.s_init_dynamic_huffman[0].v_n_dist; + v_n_clen = self->private_data.s_init_dynamic_huffman[0].v_n_clen; + v_i = self->private_data.s_init_dynamic_huffman[0].v_i; + v_mask = self->private_data.s_init_dynamic_huffman[0].v_mask; + v_table_entry = self->private_data.s_init_dynamic_huffman[0].v_table_entry; + v_n_extra_bits = + self->private_data.s_init_dynamic_huffman[0].v_n_extra_bits; + v_rep_symbol = self->private_data.s_init_dynamic_huffman[0].v_rep_symbol; + v_rep_count = self->private_data.s_init_dynamic_huffman[0].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 < 14) { + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + 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 += 8; + } + v_n_lit = (((v_bits)&0x1F) + 257); + if (v_n_lit > 286) { + status = wuffs_deflate__error__bad_literal_length_code_count; + goto exit; + } + v_bits >>= 5; + v_n_dist = (((v_bits)&0x1F) + 1); + if (v_n_dist > 30) { + status = wuffs_deflate__error__bad_distance_code_count; + goto exit; + } + v_bits >>= 5; + v_n_clen = (((v_bits)&0xF) + 4); + v_bits >>= 4; + v_n_bits -= 14; + v_i = 0; + while (v_i < v_n_clen) { + while (v_n_bits < 3) { + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + 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 += 8; + } + self->private_data.f_code_lengths[wuffs_deflate__code_order[v_i]] = + ((uint8_t)((v_bits & 7))); + v_bits >>= 3; + v_n_bits -= 3; + v_i += 1; + } + while (v_i < 19) { + self->private_data.f_code_lengths[wuffs_deflate__code_order[v_i]] = 0; + v_i += 1; + } + v_status = wuffs_deflate__decoder__init_huff(self, 0, 0, 19, 4095); + if (wuffs_base__status__is_error(v_status)) { + status = v_status; + goto exit; + } + v_mask = ((((uint32_t)(1)) << self->private_impl.f_n_huffs_bits[0]) - 1); + v_i = 0; + label_0_continue:; + while (v_i < (v_n_lit + v_n_dist)) { + while (true) { + v_table_entry = self->private_data.f_huffs[0][(v_bits & v_mask)]; + v_table_entry_n_bits = (v_table_entry & 15); + if (v_n_bits >= v_table_entry_n_bits) { + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + goto label_1_break; + } + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + 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 += 8; + } + label_1_break:; + if ((v_table_entry >> 24) != 128) { + status = + wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + goto exit; + } + v_table_entry = ((v_table_entry >> 8) & 255); + if (v_table_entry < 16) { + self->private_data.f_code_lengths[v_i] = ((uint8_t)(v_table_entry)); + v_i += 1; + goto label_0_continue; + } + v_n_extra_bits = 0; + v_rep_symbol = 0; + v_rep_count = 0; + if (v_table_entry == 16) { + v_n_extra_bits = 2; + if (v_i <= 0) { + status = wuffs_deflate__error__bad_huffman_code_length_repetition; + goto exit; + } + v_rep_symbol = (self->private_data.f_code_lengths[(v_i - 1)] & 15); + v_rep_count = 3; + } else if (v_table_entry == 17) { + v_n_extra_bits = 3; + v_rep_symbol = 0; + v_rep_count = 3; + } else if (v_table_entry == 18) { + v_n_extra_bits = 7; + v_rep_symbol = 0; + v_rep_count = 11; + } else { + 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__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 += 8; + } + v_rep_count += ((v_bits)&WUFFS_BASE__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 > 0) { + if (v_i >= (v_n_lit + v_n_dist)) { + status = wuffs_deflate__error__bad_huffman_code_length_count; + goto exit; + } + self->private_data.f_code_lengths[v_i] = v_rep_symbol; + v_i += 1; + v_rep_count -= 1; + } + } + if (v_i != (v_n_lit + v_n_dist)) { + status = wuffs_deflate__error__bad_huffman_code_length_count; + goto exit; + } + if (self->private_data.f_code_lengths[256] == 0) { + status = wuffs_deflate__error__missing_end_of_block_code; + goto exit; + } + v_status = wuffs_deflate__decoder__init_huff(self, 0, 0, v_n_lit, 257); + if (wuffs_base__status__is_error(v_status)) { + status = v_status; + goto exit; + } + v_status = wuffs_deflate__decoder__init_huff(self, 1, v_n_lit, + (v_n_lit + v_n_dist), 0); + 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] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_init_dynamic_huffman[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + self->private_data.s_init_dynamic_huffman[0].v_bits = v_bits; + self->private_data.s_init_dynamic_huffman[0].v_n_bits = v_n_bits; + self->private_data.s_init_dynamic_huffman[0].v_n_lit = v_n_lit; + self->private_data.s_init_dynamic_huffman[0].v_n_dist = v_n_dist; + self->private_data.s_init_dynamic_huffman[0].v_n_clen = v_n_clen; + self->private_data.s_init_dynamic_huffman[0].v_i = v_i; + self->private_data.s_init_dynamic_huffman[0].v_mask = v_mask; + self->private_data.s_init_dynamic_huffman[0].v_table_entry = v_table_entry; + self->private_data.s_init_dynamic_huffman[0].v_n_extra_bits = v_n_extra_bits; + self->private_data.s_init_dynamic_huffman[0].v_rep_symbol = v_rep_symbol; + self->private_data.s_init_dynamic_huffman[0].v_rep_count = v_rep_count; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func deflate.decoder.init_huff + +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[(self->private_data.f_code_lengths[v_i] & 15)] >= 320) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } +#if defined(__GNUC__) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wconversion" +#endif + v_counts[(self->private_data.f_code_lengths[v_i] & 15)] += 1; +#if defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + v_i += 1; + } + if ((((uint32_t)(v_counts[0])) + a_n_codes0) == a_n_codes1) { + return wuffs_deflate__error__no_huffman_codes; + } + v_remaining = 1; + v_i = 1; + while (v_i <= 15) { + if (v_remaining > 1073741824) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + v_remaining <<= 1; + if (v_remaining < ((uint32_t)(v_counts[v_i]))) { + return wuffs_deflate__error__bad_huffman_code_over_subscribed; + } + v_remaining -= ((uint32_t)(v_counts[v_i])); + v_i += 1; + } + if (v_remaining != 0) { + if ((a_which == 1) && (v_counts[1] == 1) && + (self->private_data.f_code_lengths[a_n_codes0] == 1) && + ((((uint32_t)(v_counts[0])) + a_n_codes0 + 1) == a_n_codes1)) { + self->private_impl.f_n_huffs_bits[1] = 1; + self->private_data.f_huffs[1][0] = + (wuffs_deflate__dcode_magic_numbers[0] | 1); + self->private_data.f_huffs[1][1] = + (wuffs_deflate__dcode_magic_numbers[31] | 1); + return NULL; + } + return wuffs_deflate__error__bad_huffman_code_under_subscribed; + } + v_i = 1; + while (v_i <= 15) { + v_offsets[v_i] = ((uint16_t)(v_n_symbols)); + v_count = ((uint32_t)(v_counts[v_i])); + if (v_n_symbols > (320 - v_count)) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + v_n_symbols = (v_n_symbols + v_count); + v_i += 1; + } + if (v_n_symbols > 288) { + return 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_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + if (self->private_data.f_code_lengths[v_i] != 0) { + if (v_offsets[(self->private_data.f_code_lengths[v_i] & 15)] >= 320) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + v_symbols[v_offsets[(self->private_data.f_code_lengths[v_i] & 15)]] = + ((uint16_t)((v_i - a_n_codes0))); +#if defined(__GNUC__) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wconversion" +#endif + v_offsets[(self->private_data.f_code_lengths[v_i] & 15)] += 1; +#if defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + } + v_i += 1; + } + v_min_cl = 1; + while (true) { + if (v_counts[v_min_cl] != 0) { + goto label_0_break; + } + if (v_min_cl >= 9) { + return wuffs_deflate__error__bad_huffman_minimum_code_length; + } + v_min_cl += 1; + } +label_0_break:; + v_max_cl = 15; + while (true) { + if (v_counts[v_max_cl] != 0) { + goto label_1_break; + } + if (v_max_cl <= 1) { + return wuffs_deflate__error__no_huffman_codes; + } + v_max_cl -= 1; + } +label_1_break:; + if (v_max_cl <= 9) { + self->private_impl.f_n_huffs_bits[a_which] = v_max_cl; + } else { + self->private_impl.f_n_huffs_bits[a_which] = 9; + } + v_i = 0; + if ((v_n_symbols != ((uint32_t)(v_offsets[v_max_cl]))) || + (v_n_symbols != ((uint32_t)(v_offsets[15])))) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + if ((a_n_codes0 + ((uint32_t)(v_symbols[0]))) >= 320) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + v_initial_high_bits = 512; + if (v_max_cl < 9) { + v_initial_high_bits = (((uint32_t)(1)) << v_max_cl); + } + v_prev_cl = ((uint32_t)((self->private_data.f_code_lengths[( + a_n_codes0 + ((uint32_t)(v_symbols[0])))] & + 15))); + v_prev_redirect_key = 4294967295; + v_top = 0; + v_next_top = 512; + v_code = 0; + v_key = 0; + v_value = 0; + while (true) { + if ((a_n_codes0 + ((uint32_t)(v_symbols[v_i]))) >= 320) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + v_cl = ((uint32_t)((self->private_data.f_code_lengths[( + a_n_codes0 + ((uint32_t)(v_symbols[v_i])))] & + 15))); + if (v_cl > v_prev_cl) { + v_code <<= (v_cl - v_prev_cl); + if (v_code >= 32768) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + } + v_prev_cl = v_cl; + v_key = v_code; + if (v_cl > 9) { + v_cl -= 9; + v_redirect_key = ((v_key >> v_cl) & 511); + v_key = ((v_key)&WUFFS_BASE__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)(1)) << v_cl); + v_j = v_prev_cl; + while (v_j <= 15) { + if (v_remaining <= ((uint32_t)(v_counts[v_j]))) { + goto label_2_break; + } + v_remaining -= ((uint32_t)(v_counts[v_j])); + if (v_remaining > 1073741824) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + v_remaining <<= 1; + v_j += 1; + } + label_2_break:; + if ((v_j <= 9) || (15 < v_j)) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + v_j -= 9; + v_initial_high_bits = (((uint32_t)(1)) << v_j); + v_top = v_next_top; + if ((v_top + (((uint32_t)(1)) << v_j)) > 1024) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + v_next_top = (v_top + (((uint32_t)(1)) << v_j)); + v_redirect_key = + (((uint32_t)(wuffs_deflate__reverse8[(v_redirect_key >> 1)])) | + ((v_redirect_key & 1) << 8)); + self->private_data.f_huffs[a_which][v_redirect_key] = + (268435465 | (v_top << 8) | (v_j << 4)); + } + } + if ((v_key >= 512) || (v_counts[v_prev_cl] <= 0)) { + return 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] -= 1; +#if defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + v_reversed_key = (((uint32_t)(wuffs_deflate__reverse8[(v_key >> 1)])) | + ((v_key & 1) << 8)); + v_reversed_key >>= (9 - v_cl); + v_symbol = ((uint32_t)(v_symbols[v_i])); + if (v_symbol == 256) { + v_value = (536870912 | v_cl); + } else if ((v_symbol < 256) && (a_which == 0)) { + v_value = (2147483648 | (v_symbol << 8) | v_cl); + } else if (v_symbol >= a_base_symbol) { + v_symbol -= a_base_symbol; + if (a_which == 0) { + v_value = (wuffs_deflate__lcode_magic_numbers[(v_symbol & 31)] | v_cl); + } else { + v_value = (wuffs_deflate__dcode_magic_numbers[(v_symbol & 31)] | v_cl); + } + } else { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + v_high_bits = v_initial_high_bits; + v_delta = (((uint32_t)(1)) << v_cl); + while (v_high_bits >= v_delta) { + v_high_bits -= v_delta; + if ((v_top + ((v_high_bits | v_reversed_key) & 511)) >= 1024) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + self->private_data + .f_huffs[a_which][(v_top + ((v_high_bits | v_reversed_key) & 511))] = + v_value; + } + v_i += 1; + if (v_i >= v_n_symbols) { + goto label_3_break; + } + v_code += 1; + if (v_code >= 32768) { + return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + } + } +label_3_break:; + return NULL; +} + +// -------- func deflate.decoder.decode_huffman_fast + +static wuffs_base__status // +wuffs_deflate__decoder__decode_huffman_fast(wuffs_deflate__decoder* self, + wuffs_base__io_buffer* a_dst, + wuffs_base__io_buffer* a_src) { + wuffs_base__status 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_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) { + 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; + } + } + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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 >= 8) || + ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7)) != 0)) { + 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)(1)) << self->private_impl.f_n_huffs_bits[0]) - 1); + v_dmask = ((((uint32_t)(1)) << self->private_impl.f_n_huffs_bits[1]) - 1); +label_0_continue:; + while ((((uint64_t)(io2_a_dst - iop_a_dst)) >= 258) && + (((uint64_t)(io2_a_src - iop_a_src)) >= 12)) { + if (v_n_bits < 15) { + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + } else { + } + v_table_entry = self->private_data.f_huffs[0][(v_bits & v_lmask)]; + v_table_entry_n_bits = (v_table_entry & 15); + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + if ((v_table_entry >> 31) != 0) { + (wuffs_base__store_u8be(iop_a_dst, + ((uint8_t)(((v_table_entry >> 8) & 255)))), + iop_a_dst += 1, wuffs_base__make_empty_struct()); + goto label_0_continue; + } else if ((v_table_entry >> 30) != 0) { + } else if ((v_table_entry >> 29) != 0) { + self->private_impl.f_end_of_block = true; + goto label_0_break; + } else if ((v_table_entry >> 28) != 0) { + if (v_n_bits < 15) { + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + } else { + } + v_redir_top = ((v_table_entry >> 8) & 65535); + v_redir_mask = ((((uint32_t)(1)) << ((v_table_entry >> 4) & 15)) - 1); + v_table_entry = + self->private_data + .f_huffs[0][((v_redir_top + (v_bits & v_redir_mask)) & 1023)]; + v_table_entry_n_bits = (v_table_entry & 15); + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + if ((v_table_entry >> 31) != 0) { + (wuffs_base__store_u8be(iop_a_dst, + ((uint8_t)(((v_table_entry >> 8) & 255)))), + iop_a_dst += 1, wuffs_base__make_empty_struct()); + goto label_0_continue; + } else if ((v_table_entry >> 30) != 0) { + } else if ((v_table_entry >> 29) != 0) { + self->private_impl.f_end_of_block = true; + goto label_0_break; + } else if ((v_table_entry >> 28) != 0) { + status = + wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + goto exit; + } else if ((v_table_entry >> 27) != 0) { + status = wuffs_deflate__error__bad_huffman_code; + goto exit; + } else { + status = + wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + goto exit; + } + } else if ((v_table_entry >> 27) != 0) { + status = wuffs_deflate__error__bad_huffman_code; + goto exit; + } else { + status = + wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + goto exit; + } + v_length = (((v_table_entry >> 8) & 255) + 3); + v_table_entry_n_bits = ((v_table_entry >> 4) & 15); + if (v_table_entry_n_bits > 0) { + if (v_n_bits < 15) { + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + } else { + } + v_length = + (((v_length + 253 + + ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & + 255) + + 3); + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + } else { + } + if (v_n_bits < 15) { + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + } else { + } + v_table_entry = self->private_data.f_huffs[1][(v_bits & v_dmask)]; + v_table_entry_n_bits = (v_table_entry & 15); + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + if ((v_table_entry >> 28) == 1) { + if (v_n_bits < 15) { + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + } else { + } + v_redir_top = ((v_table_entry >> 8) & 65535); + v_redir_mask = ((((uint32_t)(1)) << ((v_table_entry >> 4) & 15)) - 1); + v_table_entry = + self->private_data + .f_huffs[1][((v_redir_top + (v_bits & v_redir_mask)) & 1023)]; + v_table_entry_n_bits = (v_table_entry & 15); + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + } else { + } + if ((v_table_entry >> 24) != 64) { + if ((v_table_entry >> 24) == 8) { + status = wuffs_deflate__error__bad_huffman_code; + goto exit; + } + status = + wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + goto exit; + } + v_dist_minus_1 = ((v_table_entry >> 8) & 32767); + v_table_entry_n_bits = ((v_table_entry >> 4) & 15); + if (v_n_bits < v_table_entry_n_bits) { + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + } + v_dist_minus_1 = + ((v_dist_minus_1 + + ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & + 32767); + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + v_n_copied = 0; + while (true) { + if (((uint64_t)((v_dist_minus_1 + 1))) > + ((uint64_t)(iop_a_dst - io0_a_dst))) { + v_hlen = 0; + v_hdist = ((uint32_t)((((uint64_t)((v_dist_minus_1 + 1))) - + ((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 = 0; + } + if (self->private_impl.f_history_index < v_hdist) { + status = wuffs_deflate__error__bad_distance; + goto exit; + } + v_hdist = (self->private_impl.f_history_index - v_hdist); + while (true) { + v_n_copied = wuffs_base__io_writer__copy_n_from_slice( + &iop_a_dst, io2_a_dst, v_hlen, + wuffs_base__slice_u8__subslice_i( + wuffs_base__make_slice_u8(self->private_data.f_history, + 32768), + (v_hdist & 32767))); + if (v_hlen <= v_n_copied) { + goto label_1_break; + } + v_hlen -= v_n_copied; + wuffs_base__io_writer__copy_n_from_slice( + &iop_a_dst, io2_a_dst, v_hlen, + wuffs_base__make_slice_u8(self->private_data.f_history, 32768)); + goto label_1_break; + } + label_1_break:; + if (v_length == 0) { + goto label_0_continue; + } + if (((uint64_t)((v_dist_minus_1 + 1))) > + ((uint64_t)(iop_a_dst - io0_a_dst))) { + status = wuffs_deflate__error__internal_error_inconsistent_distance; + goto exit; + } + } + wuffs_base__io_writer__copy_n_from_history_fast( + &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1)); + goto label_2_break; + } + label_2_break:; + } +label_0_break:; + while (v_n_bits >= 8) { + v_n_bits -= 8; + if (iop_a_src > io1_a_src) { + (iop_a_src--, wuffs_base__make_empty_struct()); + } else { + status = wuffs_deflate__error__internal_error_inconsistent_i_o; + goto exit; + } + } + self->private_impl.f_bits = (v_bits & ((((uint32_t)(1)) << v_n_bits) - 1)); + self->private_impl.f_n_bits = v_n_bits; + if ((self->private_impl.f_n_bits >= 8) || + ((self->private_impl.f_bits >> self->private_impl.f_n_bits) != 0)) { + status = wuffs_deflate__error__internal_error_inconsistent_n_bits; + goto exit; + } + goto exit; +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)); + } + + return status; +} + +// -------- func deflate.decoder.decode_huffman_slow + +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 = 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) { + 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; + } + } + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + v_bits = self->private_data.s_decode_huffman_slow[0].v_bits; + v_n_bits = self->private_data.s_decode_huffman_slow[0].v_n_bits; + v_table_entry = self->private_data.s_decode_huffman_slow[0].v_table_entry; + v_table_entry_n_bits = + self->private_data.s_decode_huffman_slow[0].v_table_entry_n_bits; + v_lmask = self->private_data.s_decode_huffman_slow[0].v_lmask; + v_dmask = self->private_data.s_decode_huffman_slow[0].v_dmask; + v_redir_top = self->private_data.s_decode_huffman_slow[0].v_redir_top; + v_redir_mask = self->private_data.s_decode_huffman_slow[0].v_redir_mask; + v_length = self->private_data.s_decode_huffman_slow[0].v_length; + v_dist_minus_1 = self->private_data.s_decode_huffman_slow[0].v_dist_minus_1; + v_hlen = self->private_data.s_decode_huffman_slow[0].v_hlen; + v_hdist = self->private_data.s_decode_huffman_slow[0].v_hdist; + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + if ((self->private_impl.f_n_bits >= 8) || + ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7)) != + 0)) { + 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)(1)) << self->private_impl.f_n_huffs_bits[0]) - 1); + v_dmask = ((((uint32_t)(1)) << self->private_impl.f_n_huffs_bits[1]) - 1); + label_0_continue:; + while (!(self->private_impl.p_decode_huffman_slow[0] != 0)) { + while (true) { + v_table_entry = self->private_data.f_huffs[0][(v_bits & v_lmask)]; + v_table_entry_n_bits = (v_table_entry & 15); + if (v_n_bits >= v_table_entry_n_bits) { + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + goto label_1_break; + } + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + 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 += 8; + } + label_1_break:; + if ((v_table_entry >> 31) != 0) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + if (iop_a_dst == io2_a_dst) { + status = wuffs_base__suspension__short_write; + goto suspend; + } + *iop_a_dst++ = ((uint8_t)(((v_table_entry >> 8) & 255))); + goto label_0_continue; + } else if ((v_table_entry >> 30) != 0) { + } else if ((v_table_entry >> 29) != 0) { + self->private_impl.f_end_of_block = true; + goto label_0_break; + } else if ((v_table_entry >> 28) != 0) { + v_redir_top = ((v_table_entry >> 8) & 65535); + v_redir_mask = ((((uint32_t)(1)) << ((v_table_entry >> 4) & 15)) - 1); + while (true) { + v_table_entry = + self->private_data + .f_huffs[0][((v_redir_top + (v_bits & v_redir_mask)) & 1023)]; + v_table_entry_n_bits = (v_table_entry & 15); + if (v_n_bits >= v_table_entry_n_bits) { + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + goto label_2_break; + } + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + 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 += 8; + } + label_2_break:; + if ((v_table_entry >> 31) != 0) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); + if (iop_a_dst == io2_a_dst) { + status = wuffs_base__suspension__short_write; + goto suspend; + } + *iop_a_dst++ = ((uint8_t)(((v_table_entry >> 8) & 255))); + goto label_0_continue; + } else if ((v_table_entry >> 30) != 0) { + } else if ((v_table_entry >> 29) != 0) { + self->private_impl.f_end_of_block = true; + goto label_0_break; + } else if ((v_table_entry >> 28) != 0) { + status = + wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + goto exit; + } else if ((v_table_entry >> 27) != 0) { + status = wuffs_deflate__error__bad_huffman_code; + goto exit; + } else { + status = + wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + goto exit; + } + } else if ((v_table_entry >> 27) != 0) { + status = wuffs_deflate__error__bad_huffman_code; + goto exit; + } else { + status = + wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + goto exit; + } + v_length = (((v_table_entry >> 8) & 255) + 3); + v_table_entry_n_bits = ((v_table_entry >> 4) & 15); + if (v_table_entry_n_bits > 0) { + 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__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 += 8; + } + v_length = (((v_length + 253 + + ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32( + v_table_entry_n_bits))) & + 255) + + 3); + 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[1][(v_bits & v_dmask)]; + v_table_entry_n_bits = (v_table_entry & 15); + if (v_n_bits >= v_table_entry_n_bits) { + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + goto label_3_break; + } + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + 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 += 8; + } + label_3_break:; + if ((v_table_entry >> 28) == 1) { + v_redir_top = ((v_table_entry >> 8) & 65535); + v_redir_mask = ((((uint32_t)(1)) << ((v_table_entry >> 4) & 15)) - 1); + while (true) { + v_table_entry = + self->private_data + .f_huffs[1][((v_redir_top + (v_bits & v_redir_mask)) & 1023)]; + v_table_entry_n_bits = (v_table_entry & 15); + if (v_n_bits >= v_table_entry_n_bits) { + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + goto label_4_break; + } + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + 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 += 8; + } + label_4_break:; + } + if ((v_table_entry >> 24) != 64) { + if ((v_table_entry >> 24) == 8) { + status = wuffs_deflate__error__bad_huffman_code; + goto exit; + } + status = + wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; + goto exit; + } + v_dist_minus_1 = ((v_table_entry >> 8) & 32767); + v_table_entry_n_bits = ((v_table_entry >> 4) & 15); + if (v_table_entry_n_bits > 0) { + 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__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 += 8; + } + v_dist_minus_1 = + ((v_dist_minus_1 + + ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & + 32767); + v_bits >>= v_table_entry_n_bits; + v_n_bits -= v_table_entry_n_bits; + } + while (true) { + if (((uint64_t)((v_dist_minus_1 + 1))) > + ((uint64_t)(iop_a_dst - io0_a_dst))) { + v_hdist = ((uint32_t)((((uint64_t)((v_dist_minus_1 + 1))) - + ((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 = 0; + } + if (self->private_impl.f_history_index < v_hdist) { + status = wuffs_deflate__error__bad_distance; + goto exit; + } + v_hdist = (self->private_impl.f_history_index - v_hdist); + while (true) { + v_n_copied = wuffs_base__io_writer__copy_n_from_slice( + &iop_a_dst, io2_a_dst, v_hlen, + wuffs_base__slice_u8__subslice_i( + wuffs_base__make_slice_u8(self->private_data.f_history, + 32768), + (v_hdist & 32767))); + if (v_hlen <= v_n_copied) { + v_hlen = 0; + goto label_5_break; + } + if (v_n_copied > 0) { + v_hlen -= v_n_copied; + v_hdist = ((v_hdist + v_n_copied) & 32767); + if (v_hdist == 0) { + goto label_5_break; + } + } + status = wuffs_base__suspension__short_write; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(9); + } + label_5_break:; + if (v_hlen > 0) { + while (true) { + v_n_copied = wuffs_base__io_writer__copy_n_from_slice( + &iop_a_dst, io2_a_dst, v_hlen, + wuffs_base__slice_u8__subslice_i( + wuffs_base__make_slice_u8(self->private_data.f_history, + 32768), + (v_hdist & 32767))); + if (v_hlen <= v_n_copied) { + v_hlen = 0; + goto label_6_break; + } + v_hlen -= v_n_copied; + v_hdist += v_n_copied; + status = wuffs_base__suspension__short_write; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10); + } + label_6_break:; + } + if (v_length == 0) { + goto label_0_continue; + } + } + v_n_copied = wuffs_base__io_writer__copy_n_from_history( + &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1)); + if (v_length <= v_n_copied) { + v_length = 0; + goto label_7_break; + } + v_length -= v_n_copied; + status = wuffs_base__suspension__short_write; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(11); + } + label_7_break:; + } + label_0_break:; + self->private_impl.f_bits = v_bits; + self->private_impl.f_n_bits = v_n_bits; + if ((self->private_impl.f_n_bits >= 8) || + ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7)) != + 0)) { + status = wuffs_deflate__error__internal_error_inconsistent_n_bits; + goto exit; + } + + goto ok; + ok: + self->private_impl.p_decode_huffman_slow[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_huffman_slow[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + self->private_data.s_decode_huffman_slow[0].v_bits = v_bits; + self->private_data.s_decode_huffman_slow[0].v_n_bits = v_n_bits; + self->private_data.s_decode_huffman_slow[0].v_table_entry = v_table_entry; + self->private_data.s_decode_huffman_slow[0].v_table_entry_n_bits = + v_table_entry_n_bits; + self->private_data.s_decode_huffman_slow[0].v_lmask = v_lmask; + self->private_data.s_decode_huffman_slow[0].v_dmask = v_dmask; + self->private_data.s_decode_huffman_slow[0].v_redir_top = v_redir_top; + self->private_data.s_decode_huffman_slow[0].v_redir_mask = v_redir_mask; + self->private_data.s_decode_huffman_slow[0].v_length = v_length; + self->private_data.s_decode_huffman_slow[0].v_dist_minus_1 = v_dist_minus_1; + self->private_data.s_decode_huffman_slow[0].v_hlen = v_hlen; + self->private_data.s_decode_huffman_slow[0].v_hdist = v_hdist; + + goto exit; +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)); + } + + return status; +} + +#endif // !defined(WUFFS_CONFIG__MODULES) || + // defined(WUFFS_CONFIG__MODULE__DEFLATE) + +#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__internal_error_inconsistent_i_o = + "#lzw: internal error: inconsistent I/O"; + +// ---------------- Private Consts + +// ---------------- Private Initializer Prototypes + +// ---------------- Private Function Prototypes + +static wuffs_base__empty_struct // +wuffs_lzw__decoder__read_from(wuffs_lzw__decoder* self, + wuffs_base__io_buffer* a_src); + +static wuffs_base__status // +wuffs_lzw__decoder__write_to(wuffs_lzw__decoder* self, + wuffs_base__io_buffer* a_dst); + +// ---------------- 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 initialize_flags) { + if (!self) { + return wuffs_base__error__bad_receiver; + } + if (sizeof(*self) != sizeof_star_self) { + return wuffs_base__error__bad_sizeof_receiver; + } + if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || + (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { + return wuffs_base__error__bad_wuffs_version; + } + + if ((initialize_flags & 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__error__initialize_falsely_claimed_already_zeroed; + } +#if !defined(__clang__) && defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + } else { + if ((initialize_flags & + WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { + memset(self, 0, sizeof(*self)); + initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; + } else { + memset(&(self->private_impl), 0, sizeof(self->private_impl)); + } + } + + self->private_impl.magic = WUFFS_BASE__MAGIC; + return NULL; +} + +size_t // +sizeof__wuffs_lzw__decoder() { + return sizeof(wuffs_lzw__decoder); +} + +// ---------------- Function Implementations + +// -------- func lzw.decoder.set_literal_width + +WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // +wuffs_lzw__decoder__set_literal_width(wuffs_lzw__decoder* self, uint32_t a_lw) { + if (!self) { + return wuffs_base__make_empty_struct(); + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return wuffs_base__make_empty_struct(); + } + if (a_lw > 8) { + self->private_impl.magic = WUFFS_BASE__DISABLED; + return wuffs_base__make_empty_struct(); + } + + self->private_impl.f_set_literal_width_arg = (a_lw + 1); + return wuffs_base__make_empty_struct(); +} + +// -------- func lzw.decoder.workbuf_len + +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__make_range_ii_u64(0, 0); + } + if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && + (self->private_impl.magic != WUFFS_BASE__DISABLED)) { + return wuffs_base__utility__make_range_ii_u64(0, 0); + } + + return wuffs_base__utility__make_range_ii_u64(0, 0); +} + +// -------- func lzw.decoder.decode_io_writer + +WUFFS_BASE__MAYBE_STATIC wuffs_base__status // +wuffs_lzw__decoder__decode_io_writer(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__error__bad_receiver; + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return (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__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__error__interleaved_coroutine_calls; + } + self->private_impl.active_coroutine = 0; + wuffs_base__status status = NULL; + + uint32_t v_i = 0; + + uint32_t coro_susp_point = self->private_impl.p_decode_io_writer[0]; + if (coro_susp_point) { + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + self->private_impl.f_literal_width = 8; + if (self->private_impl.f_set_literal_width_arg > 0) { + self->private_impl.f_literal_width = + (self->private_impl.f_set_literal_width_arg - 1); + } + self->private_impl.f_clear_code = + (((uint32_t)(1)) << self->private_impl.f_literal_width); + self->private_impl.f_end_code = (self->private_impl.f_clear_code + 1); + 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 + 1); + self->private_impl.f_bits = 0; + self->private_impl.f_n_bits = 0; + self->private_impl.f_output_ri = 0; + self->private_impl.f_output_wi = 0; + v_i = 0; + while (v_i < self->private_impl.f_clear_code) { + self->private_data.f_lm1s[v_i] = 0; + self->private_data.f_suffixes[v_i][0] = ((uint8_t)(v_i)); + v_i += 1; + } + label_0_continue:; + while (true) { + wuffs_lzw__decoder__read_from(self, a_src); + if (self->private_impl.f_output_wi > 0) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); + status = wuffs_lzw__decoder__write_to(self, a_dst); + if (status) { + goto suspend; + } + } + if (self->private_impl.f_read_from_return_value == 0) { + goto label_0_break; + } else if (self->private_impl.f_read_from_return_value == 1) { + goto label_0_continue; + } else if (self->private_impl.f_read_from_return_value == 2) { + status = wuffs_base__suspension__short_read; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2); + } else if (self->private_impl.f_read_from_return_value == 3) { + status = wuffs_lzw__error__bad_code; + goto exit; + } else { + status = wuffs_lzw__error__internal_error_inconsistent_i_o; + goto exit; + } + } + label_0_break:; + + goto ok; + ok: + self->private_impl.p_decode_io_writer[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_io_writer[0] = + 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 + +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; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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)) >= 4) { + v_bits |= (wuffs_base__load_u32le(iop_a_src) << v_n_bits); + (iop_a_src += ((31 - v_n_bits) >> 3), wuffs_base__make_empty_struct()); + v_n_bits |= 24; + } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { + self->private_impl.f_read_from_return_value = 2; + goto label_0_break; + } else { + v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + if (v_n_bits >= v_width) { + } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { + self->private_impl.f_read_from_return_value = 2; + goto label_0_break; + } else { + v_bits |= + (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + v_n_bits += 8; + if (v_n_bits < v_width) { + self->private_impl.f_read_from_return_value = 4; + goto label_0_break; + } + } + } + } + v_code = ((v_bits)&WUFFS_BASE__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 + 1) & 8191); + if (v_save_code <= 4095) { + v_lm1_a = ((self->private_data.f_lm1s[v_prev_code] + 1) & 4095); + self->private_data.f_lm1s[v_save_code] = v_lm1_a; + if ((v_lm1_a % 8) != 0) { + 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][(v_lm1_a % 8)] = + ((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][0] = ((uint8_t)(v_code)); + } + v_save_code += 1; + if (v_width < 12) { + v_width += (1 & (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 = 0; + goto label_0_break; + } + v_save_code = v_end_code; + v_prev_code = v_end_code; + v_width = (self->private_impl.f_literal_width + 1); + } 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])) & 4294967288)) & + 8191); + v_output_wi = + ((v_output_wi + 1 + ((uint32_t)(self->private_data.f_lm1s[v_c]))) & + 8191); + v_steps = (((uint32_t)(self->private_data.f_lm1s[v_c])) >> 3); + while (true) { + memcpy((self->private_data.f_output) + (v_o), + (self->private_data.f_suffixes[v_c]), 8); + if (v_steps <= 0) { + goto label_1_break; + } + v_steps -= 1; + v_o = ((v_o - 8) & 8191); + v_c = ((uint32_t)(self->private_impl.f_prefixes[v_c])); + } + label_1_break:; + v_first_byte = self->private_data.f_suffixes[v_c][0]; + if (v_code == v_save_code) { + self->private_data.f_output[v_output_wi] = v_first_byte; + v_output_wi = ((v_output_wi + 1) & 8191); + } + if (v_save_code <= 4095) { + v_lm1_b = ((self->private_data.f_lm1s[v_prev_code] + 1) & 4095); + self->private_data.f_lm1s[v_save_code] = v_lm1_b; + if ((v_lm1_b % 8) != 0) { + 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][(v_lm1_b % 8)] = + 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][0] = + ((uint8_t)(v_first_byte)); + } + v_save_code += 1; + if (v_width < 12) { + v_width += (1 & (v_save_code >> v_width)); + } + v_prev_code = v_code; + } + } else { + self->private_impl.f_read_from_return_value = 3; + goto label_0_break; + } + if (v_output_wi > 4095) { + self->private_impl.f_read_from_return_value = 1; + goto label_0_break; + } + } +label_0_break:; + if (self->private_impl.f_read_from_return_value != 2) { + while (v_n_bits >= 8) { + v_n_bits -= 8; + if (iop_a_src > io1_a_src) { + (iop_a_src--, wuffs_base__make_empty_struct()); + } else { + self->private_impl.f_read_from_return_value = 4; + goto label_2_break; + } + } + label_2_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->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return wuffs_base__make_empty_struct(); +} + +// -------- func lzw.decoder.write_to + +static wuffs_base__status // +wuffs_lzw__decoder__write_to(wuffs_lzw__decoder* self, + wuffs_base__io_buffer* a_dst) { + wuffs_base__status 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) { + 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[0]; + if (coro_susp_point) { + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + while (self->private_impl.f_output_wi > 0) { + if (self->private_impl.f_output_ri > self->private_impl.f_output_wi) { + status = wuffs_lzw__error__internal_error_inconsistent_i_o; + goto exit; + } + v_s = wuffs_base__slice_u8__subslice_ij( + wuffs_base__make_slice_u8(self->private_data.f_output, 8199), + self->private_impl.f_output_ri, self->private_impl.f_output_wi); + v_n = wuffs_base__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 = 0; + self->private_impl.f_output_wi = 0; + status = NULL; + goto ok; + } + self->private_impl.f_output_ri = + ((self->private_impl.f_output_ri + ((uint32_t)((v_n & 4294967295)))) & + 8191); + status = wuffs_base__suspension__short_write; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1); + } + + goto ok; + ok: + self->private_impl.p_write_to[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_write_to[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + + goto exit; +exit: + if (a_dst) { + a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); + } + + return status; +} + +// -------- func lzw.decoder.flush + +WUFFS_BASE__MAYBE_STATIC wuffs_base__slice_u8 // +wuffs_lzw__decoder__flush(wuffs_lzw__decoder* self) { + if (!self) { + return wuffs_base__make_slice_u8(NULL, 0); + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return wuffs_base__make_slice_u8(NULL, 0); + } + + wuffs_base__slice_u8 v_s = {0}; + + if (self->private_impl.f_output_ri <= self->private_impl.f_output_wi) { + v_s = wuffs_base__slice_u8__subslice_ij( + wuffs_base__make_slice_u8(self->private_data.f_output, 8199), + self->private_impl.f_output_ri, self->private_impl.f_output_wi); + } + self->private_impl.f_output_ri = 0; + self->private_impl.f_output_wi = 0; + return v_s; +} + +#endif // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZW) + +#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GIF) + +// ---------------- Status Codes Implementations + +const char* wuffs_gif__error__bad_block = "#gif: bad block"; +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__internal_error_inconsistent_ri_wi = + "#gif: internal error: inconsistent ri/wi"; + +// ---------------- Private Consts + +static const uint32_t // + wuffs_gif__interlace_start[5] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 4294967295, 1, 2, 4, 0, +}; + +static const uint8_t // + wuffs_gif__interlace_delta[5] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 1, 2, 4, 8, 8, +}; + +static const uint8_t // + wuffs_gif__interlace_count[5] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 0, 1, 2, 4, 8, +}; + +static const uint8_t // + wuffs_gif__animexts1dot0[11] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 65, 78, 73, 77, 69, 88, 84, 83, 49, 46, 48, +}; + +static const uint8_t // + wuffs_gif__netscape2dot0[11] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 78, 69, 84, 83, 67, 65, 80, 69, 50, 46, 48, +}; + +static const uint8_t // + wuffs_gif__iccrgbg1012[11] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 73, 67, 67, 82, 71, 66, 71, 49, 48, 49, 50, +}; + +static const uint8_t // + wuffs_gif__xmpdataxmp[11] // + WUFFS_BASE__POTENTIALLY_UNUSED = { + 88, 77, 80, 32, 68, 97, 116, 97, 88, 77, 80, +}; + +// ---------------- Private Initializer Prototypes + +// ---------------- Private Function Prototypes + +static wuffs_base__status // +wuffs_gif__decoder__skip_frame(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +static wuffs_base__empty_struct // +wuffs_gif__decoder__reset_gc(wuffs_gif__decoder* self); + +static wuffs_base__status // +wuffs_gif__decoder__decode_up_to_id_part1(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +static wuffs_base__status // +wuffs_gif__decoder__decode_header(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +static wuffs_base__status // +wuffs_gif__decoder__decode_lsd(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +static wuffs_base__status // +wuffs_gif__decoder__decode_extension(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +static wuffs_base__status // +wuffs_gif__decoder__skip_blocks(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +static wuffs_base__status // +wuffs_gif__decoder__decode_ae(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +static wuffs_base__status // +wuffs_gif__decoder__decode_gc(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +static wuffs_base__status // +wuffs_gif__decoder__decode_id_part0(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src); + +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); + +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); + +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); + +// ---------------- 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 initialize_flags) { + if (!self) { + return wuffs_base__error__bad_receiver; + } + if (sizeof(*self) != sizeof_star_self) { + return wuffs_base__error__bad_sizeof_receiver; + } + if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || + (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { + return wuffs_base__error__bad_wuffs_version; + } + + if ((initialize_flags & 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__error__initialize_falsely_claimed_already_zeroed; + } +#if !defined(__clang__) && defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + } else { + if ((initialize_flags & + WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { + memset(self, 0, sizeof(*self)); + initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; + } else { + memset(&(self->private_impl), 0, sizeof(self->private_impl)); + } + } + + { + wuffs_base__status z = wuffs_lzw__decoder__initialize( + &self->private_data.f_lzw, sizeof(self->private_data.f_lzw), + WUFFS_VERSION, initialize_flags); + if (z) { + return z; + } + } + self->private_impl.magic = WUFFS_BASE__MAGIC; + return NULL; +} + +size_t // +sizeof__wuffs_gif__decoder() { + return sizeof(wuffs_gif__decoder); +} + +// ---------------- Function Implementations + +// -------- func gif.decoder.set_quirk_enabled + +WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // +wuffs_gif__decoder__set_quirk_enabled(wuffs_gif__decoder* self, + uint32_t a_quirk, + bool a_enabled) { + 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_call_sequence == 0) { + if (a_quirk == 1041635328) { + self->private_impl.f_quirk_enabled_delay_num_decoded_frames = a_enabled; + } else if (a_quirk == 1041635329) { + self->private_impl + .f_quirk_enabled_first_frame_local_palette_means_black_background = + a_enabled; + } else if (a_quirk == 1041635330) { + self->private_impl.f_quirk_enabled_honor_background_color = a_enabled; + } else if (a_quirk == 1041635331) { + self->private_impl.f_quirk_enabled_ignore_too_much_pixel_data = a_enabled; + } else if (a_quirk == 1041635332) { + self->private_impl.f_quirk_enabled_image_bounds_are_strict = a_enabled; + } else if (a_quirk == 1041635333) { + self->private_impl.f_quirk_enabled_reject_empty_frame = a_enabled; + } else if (a_quirk == 1041635334) { + self->private_impl.f_quirk_enabled_reject_empty_palette = a_enabled; + } + } + return wuffs_base__make_empty_struct(); +} + +// -------- func gif.decoder.decode_image_config + +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__error__bad_receiver; + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return (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__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__error__interleaved_coroutine_calls; + } + self->private_impl.active_coroutine = 0; + wuffs_base__status status = NULL; + + bool v_ffio = false; + + uint32_t coro_susp_point = self->private_impl.p_decode_image_config[0]; + if (coro_susp_point) { + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + if (self->private_impl.f_call_sequence == 0) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); + status = wuffs_gif__decoder__decode_header(self, a_src); + if (status) { + goto suspend; + } + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + status = wuffs_gif__decoder__decode_lsd(self, a_src); + if (status) { + goto suspend; + } + } else if (self->private_impl.f_call_sequence != 2) { + status = wuffs_base__error__bad_call_sequence; + goto exit; + } + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); + status = wuffs_gif__decoder__decode_up_to_id_part1(self, a_src); + if (status) { + goto suspend; + } + v_ffio = !self->private_impl.f_gc_has_transparent_index; + if (!self->private_impl.f_quirk_enabled_honor_background_color) { + v_ffio = + (v_ffio && (self->private_impl.f_frame_rect_x0 == 0) && + (self->private_impl.f_frame_rect_y0 == 0) && + (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 = 4278190080; + } + if (self->private_impl.f_background_color_u32_argb_premul == 77) { + 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, 1191444488, 0, self->private_impl.f_width, + self->private_impl.f_height, + self->private_impl.f_frame_config_io_position, v_ffio); + } + self->private_impl.f_call_sequence = 3; + + goto ok; + ok: + self->private_impl.p_decode_image_config[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_image_config[0] = + 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.set_report_metadata + +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 == 1229144912) { + self->private_impl.f_report_metadata_iccp = a_report; + } else if (a_fourcc == 1481461792) { + self->private_impl.f_report_metadata_xmp = a_report; + } + return wuffs_base__make_empty_struct(); +} + +// -------- func gif.decoder.ack_metadata_chunk + +WUFFS_BASE__MAYBE_STATIC wuffs_base__status // +wuffs_gif__decoder__ack_metadata_chunk(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src) { + if (!self) { + return wuffs_base__error__bad_receiver; + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return (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__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__error__interleaved_coroutine_calls; + } + self->private_impl.active_coroutine = 0; + wuffs_base__status status = NULL; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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_ack_metadata_chunk[0]; + if (coro_susp_point) { + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + if (self->private_impl.f_call_sequence != 1) { + status = wuffs_base__error__bad_call_sequence; + goto exit; + } + if (wuffs_base__u64__sat_add(a_src->meta.pos, + ((uint64_t)(iop_a_src - io0_a_src))) != + self->private_impl.f_metadata_io_position) { + status = wuffs_base__error__bad_i_o_position; + goto exit; + } + if (self->private_impl.f_metadata_chunk_length_value > 0) { + while (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { + status = wuffs_base__suspension__short_read; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1); + } + self->private_impl.f_metadata_chunk_length_value = + ((uint64_t)(wuffs_base__load_u8be(iop_a_src))); + if (self->private_impl.f_metadata_chunk_length_value > 0) { + if (self->private_impl.f_metadata_fourcc_value == 1481461792) { + self->private_impl.f_metadata_chunk_length_value += 1; + } else { + (iop_a_src += 1, wuffs_base__make_empty_struct()); + } + self->private_impl.f_metadata_io_position = wuffs_base__u64__sat_add( + wuffs_base__u64__sat_add(a_src->meta.pos, + ((uint64_t)(iop_a_src - io0_a_src))), + self->private_impl.f_metadata_chunk_length_value); + status = wuffs_base__warning__metadata_reported; + goto ok; + } + (iop_a_src += 1, wuffs_base__make_empty_struct()); + } + self->private_impl.f_call_sequence = 2; + self->private_impl.f_metadata_fourcc_value = 0; + self->private_impl.f_metadata_io_position = 0; + status = NULL; + goto ok; + goto ok; + ok: + self->private_impl.p_ack_metadata_chunk[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_ack_metadata_chunk[0] = + 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 (a_src) { + 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 gif.decoder.metadata_fourcc + +WUFFS_BASE__MAYBE_STATIC uint32_t // +wuffs_gif__decoder__metadata_fourcc(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_metadata_fourcc_value; +} + +// -------- func gif.decoder.metadata_chunk_length + +WUFFS_BASE__MAYBE_STATIC uint64_t // +wuffs_gif__decoder__metadata_chunk_length(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_metadata_chunk_length_value; +} + +// -------- func gif.decoder.num_animation_loops + +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_loops) { + return self->private_impl.f_num_loops; + } + return 1; +} + +// -------- func gif.decoder.num_decoded_frame_configs + +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__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__MAYBE_STATIC wuffs_base__rect_ie_u32 // +wuffs_gif__decoder__frame_dirty_rect(const wuffs_gif__decoder* self) { + if (!self) { + return wuffs_base__utility__make_rect_ie_u32(0, 0, 0, 0); + } + if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && + (self->private_impl.magic != WUFFS_BASE__DISABLED)) { + return wuffs_base__utility__make_rect_ie_u32(0, 0, 0, 0); + } + + 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__MAYBE_STATIC wuffs_base__range_ii_u64 // +wuffs_gif__decoder__workbuf_len(const wuffs_gif__decoder* self) { + if (!self) { + return wuffs_base__utility__make_range_ii_u64(0, 0); + } + if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && + (self->private_impl.magic != WUFFS_BASE__DISABLED)) { + return wuffs_base__utility__make_range_ii_u64(0, 0); + } + + return wuffs_base__utility__make_range_ii_u64(1, 1); +} + +// -------- func gif.decoder.restart_frame + +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__error__bad_receiver; + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return (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 == 0) { + return wuffs_base__error__bad_call_sequence; + } + self->private_impl.f_delayed_num_decoded_frames = false; + self->private_impl.f_end_of_data = false; + self->private_impl.f_restarted = true; + 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); + return NULL; +} + +// -------- func gif.decoder.decode_frame_config + +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__error__bad_receiver; + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return (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__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__error__interleaved_coroutine_calls; + } + self->private_impl.active_coroutine = 0; + wuffs_base__status status = NULL; + + uint8_t v_blend = 0; + uint32_t v_background_color = 0; + uint8_t v_flags = 0; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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_frame_config[0]; + if (coro_susp_point) { + v_blend = self->private_data.s_decode_frame_config[0].v_blend; + v_background_color = + self->private_data.s_decode_frame_config[0].v_background_color; + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + self->private_impl.f_ignore_metadata = true; + self->private_impl.f_dirty_max_excl_y = 0; + if (!self->private_impl.f_end_of_data) { + if (self->private_impl.f_call_sequence == 0) { + 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__decode_image_config(self, NULL, a_src); + if (a_src) { + iop_a_src = a_src->data.ptr + a_src->meta.ri; + } + if (status) { + goto suspend; + } + } else if (self->private_impl.f_call_sequence != 3) { + if (self->private_impl.f_call_sequence == 4) { + 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) { + goto suspend; + } + } + 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) { + goto suspend; + } + } + } + if (self->private_impl.f_end_of_data) { + status = wuffs_base__warning__end_of_data; + goto ok; + } + v_blend = 0; + v_background_color = self->private_impl.f_black_color_u32_argb_premul; + if (!self->private_impl.f_gc_has_transparent_index) { + v_blend = 2; + v_background_color = + self->private_impl.f_background_color_u32_argb_premul; + if (self->private_impl + .f_quirk_enabled_first_frame_local_palette_means_black_background && + (self->private_impl.f_num_decoded_frame_configs_value == 0)) { + while (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { + status = wuffs_base__suspension__short_read; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4); + } + v_flags = wuffs_base__load_u8be(iop_a_src); + if ((v_flags & 128) != 0) { + v_background_color = self->private_impl.f_black_color_u32_argb_premul; + } + } + } + if (a_dst != NULL) { + wuffs_base__frame_config__update( + 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, v_blend, + self->private_impl.f_gc_disposal, v_background_color); + } + wuffs_base__u64__sat_add_indirect( + &self->private_impl.f_num_decoded_frame_configs_value, 1); + self->private_impl.f_call_sequence = 4; + + goto ok; + ok: + self->private_impl.p_decode_frame_config[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_frame_config[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + self->private_impl.active_coroutine = + wuffs_base__status__is_suspension(status) ? 3 : 0; + self->private_data.s_decode_frame_config[0].v_blend = v_blend; + self->private_data.s_decode_frame_config[0].v_background_color = + v_background_color; + + goto exit; +exit: + if (a_src) { + 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 gif.decoder.skip_frame + +static wuffs_base__status // +wuffs_gif__decoder__skip_frame(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src) { + wuffs_base__status status = NULL; + + uint8_t v_flags = 0; + uint8_t v_lw = 0; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + } + 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__suspension__short_read; + goto suspend; + } + uint8_t t_0 = *iop_a_src++; + v_flags = t_0; + } + if ((v_flags & 128) != 0) { + self->private_data.s_skip_frame[0].scratch = + (((uint32_t)(3)) << (1 + (v_flags & 7))); + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + if (self->private_data.s_skip_frame[0].scratch > + ((uint64_t)(io2_a_src - iop_a_src))) { + self->private_data.s_skip_frame[0].scratch -= + ((uint64_t)(io2_a_src - iop_a_src)); + iop_a_src = io2_a_src; + status = wuffs_base__suspension__short_read; + goto suspend; + } + iop_a_src += self->private_data.s_skip_frame[0].scratch; + } + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint8_t t_1 = *iop_a_src++; + v_lw = t_1; + } + if (v_lw > 8) { + 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) { + goto suspend; + } + if (self->private_impl.f_quirk_enabled_delay_num_decoded_frames) { + self->private_impl.f_delayed_num_decoded_frames = true; + } else { + wuffs_base__u64__sat_add_indirect( + &self->private_impl.f_num_decoded_frames_value, 1); + } + wuffs_gif__decoder__reset_gc(self); + + goto ok; + ok: + self->private_impl.p_skip_frame[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_skip_frame[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.decode_frame + +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__slice_u8 a_workbuf, + wuffs_base__decode_frame_options* a_opts) { + if (!self) { + return wuffs_base__error__bad_receiver; + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return (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__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__error__interleaved_coroutine_calls; + } + self->private_impl.active_coroutine = 0; + wuffs_base__status status = NULL; + + uint32_t coro_susp_point = self->private_impl.p_decode_frame[0]; + if (coro_susp_point) { + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + self->private_impl.f_ignore_metadata = true; + if (self->private_impl.f_call_sequence != 4) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); + status = wuffs_gif__decoder__decode_frame_config(self, NULL, a_src); + if (status) { + goto suspend; + } + } + if (self->private_impl.f_quirk_enabled_reject_empty_frame && + ((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_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); + if (status) { + goto suspend; + } + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); + status = wuffs_gif__decoder__decode_id_part2(self, a_dst, a_src, a_workbuf); + if (status) { + goto suspend; + } + wuffs_base__u64__sat_add_indirect( + &self->private_impl.f_num_decoded_frames_value, 1); + wuffs_gif__decoder__reset_gc(self); + + goto ok; + ok: + self->private_impl.p_decode_frame[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_frame[0] = + 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.reset_gc + +static wuffs_base__empty_struct // +wuffs_gif__decoder__reset_gc(wuffs_gif__decoder* self) { + self->private_impl.f_call_sequence = 5; + self->private_impl.f_gc_has_transparent_index = false; + self->private_impl.f_gc_transparent_index = 0; + self->private_impl.f_gc_disposal = 0; + self->private_impl.f_gc_duration = 0; + return wuffs_base__make_empty_struct(); +} + +// -------- func gif.decoder.decode_up_to_id_part1 + +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 = NULL; + + uint8_t v_block_type = 0; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + if (!self->private_impl.f_restarted) { + if (self->private_impl.f_call_sequence != 2) { + self->private_impl.f_frame_config_io_position = + wuffs_base__u64__sat_add(a_src->meta.pos, + ((uint64_t)(iop_a_src - io0_a_src))); + } + } else if (self->private_impl.f_frame_config_io_position != + wuffs_base__u64__sat_add(a_src->meta.pos, + ((uint64_t)(iop_a_src - io0_a_src)))) { + status = wuffs_base__error__bad_restart; + goto exit; + } else { + self->private_impl.f_restarted = false; + } + while (true) { + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint8_t t_0 = *iop_a_src++; + v_block_type = t_0; + } + if (v_block_type == 33) { + 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) { + goto suspend; + } + } else if (v_block_type == 44) { + if (self->private_impl.f_delayed_num_decoded_frames) { + self->private_impl.f_delayed_num_decoded_frames = false; + wuffs_base__u64__sat_add_indirect( + &self->private_impl.f_num_decoded_frames_value, 1); + } + 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) { + goto suspend; + } + goto label_0_break; + } else if (v_block_type == 59) { + if (self->private_impl.f_delayed_num_decoded_frames) { + self->private_impl.f_delayed_num_decoded_frames = false; + wuffs_base__u64__sat_add_indirect( + &self->private_impl.f_num_decoded_frames_value, 1); + } + self->private_impl.f_end_of_data = true; + goto label_0_break; + } else { + status = wuffs_gif__error__bad_block; + goto exit; + } + } + label_0_break:; + + goto ok; + ok: + self->private_impl.p_decode_up_to_id_part1[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_up_to_id_part1[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.decode_header + +static wuffs_base__status // +wuffs_gif__decoder__decode_header(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src) { + wuffs_base__status status = NULL; + + uint8_t v_c[6] = {0}; + uint32_t v_i = 0; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + memcpy(v_c, self->private_data.s_decode_header[0].v_c, sizeof(v_c)); + v_i = self->private_data.s_decode_header[0].v_i; + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + while (v_i < 6) { + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint8_t t_0 = *iop_a_src++; + v_c[v_i] = t_0; + } + v_i += 1; + } + if ((v_c[0] != 71) || (v_c[1] != 73) || (v_c[2] != 70) || (v_c[3] != 56) || + ((v_c[4] != 55) && (v_c[4] != 57)) || (v_c[5] != 97)) { + status = wuffs_gif__error__bad_header; + goto exit; + } + + goto ok; + ok: + self->private_impl.p_decode_header[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_header[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + memcpy(self->private_data.s_decode_header[0].v_c, v_c, sizeof(v_c)); + self->private_data.s_decode_header[0].v_i = v_i; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.decode_lsd + +static wuffs_base__status // +wuffs_gif__decoder__decode_lsd(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src) { + wuffs_base__status 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; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + v_flags = self->private_data.s_decode_lsd[0].v_flags; + v_background_color_index = + self->private_data.s_decode_lsd[0].v_background_color_index; + v_num_palette_entries = + self->private_data.s_decode_lsd[0].v_num_palette_entries; + v_i = self->private_data.s_decode_lsd[0].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__load_u16le(iop_a_src))); + iop_a_src += 2; + } else { + self->private_data.s_decode_lsd[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_lsd[0].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 += 8; + *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__load_u16le(iop_a_src))); + iop_a_src += 2; + } else { + self->private_data.s_decode_lsd[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_lsd[0].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 += 8; + *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__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__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__suspension__short_read; + goto suspend; + } + iop_a_src++; + v_i = 0; + self->private_impl.f_has_global_palette = ((v_flags & 128) != 0); + if (self->private_impl.f_has_global_palette) { + v_num_palette_entries = (((uint32_t)(1)) << (1 + (v_flags & 7))); + 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__load_u24be(iop_a_src))); + iop_a_src += 3; + } else { + self->private_data.s_decode_lsd[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_lsd[0].scratch; + uint32_t num_bits_4 = ((uint32_t)(*scratch & 0xFF)); + *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 += 8; + *scratch |= ((uint64_t)(num_bits_4)); + } + } + v_argb = t_4; + } + v_argb |= 4278190080; + self->private_data.f_palettes[0][((4 * v_i) + 0)] = + ((uint8_t)(((v_argb >> 0) & 255))); + self->private_data.f_palettes[0][((4 * v_i) + 1)] = + ((uint8_t)(((v_argb >> 8) & 255))); + self->private_data.f_palettes[0][((4 * v_i) + 2)] = + ((uint8_t)(((v_argb >> 16) & 255))); + self->private_data.f_palettes[0][((4 * v_i) + 3)] = + ((uint8_t)(((v_argb >> 24) & 255))); + v_i += 1; + } + if (self->private_impl.f_quirk_enabled_honor_background_color) { + if ((v_background_color_index != 0) && + (((uint32_t)(v_background_color_index)) < v_num_palette_entries)) { + v_j = (4 * ((uint32_t)(v_background_color_index))); + self->private_impl.f_background_color_u32_argb_premul = + ((((uint32_t)(self->private_data.f_palettes[0][(v_j + 0)])) + << 0) | + (((uint32_t)(self->private_data.f_palettes[0][(v_j + 1)])) + << 8) | + (((uint32_t)(self->private_data.f_palettes[0][(v_j + 2)])) + << 16) | + (((uint32_t)(self->private_data.f_palettes[0][(v_j + 3)])) + << 24)); + } else { + self->private_impl.f_background_color_u32_argb_premul = 77; + } + } + } + while (v_i < 256) { + self->private_data.f_palettes[0][((4 * v_i) + 0)] = 0; + self->private_data.f_palettes[0][((4 * v_i) + 1)] = 0; + self->private_data.f_palettes[0][((4 * v_i) + 2)] = 0; + self->private_data.f_palettes[0][((4 * v_i) + 3)] = 255; + v_i += 1; + } + + goto ok; + ok: + self->private_impl.p_decode_lsd[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_lsd[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + self->private_data.s_decode_lsd[0].v_flags = v_flags; + self->private_data.s_decode_lsd[0].v_background_color_index = + v_background_color_index; + self->private_data.s_decode_lsd[0].v_num_palette_entries = + v_num_palette_entries; + self->private_data.s_decode_lsd[0].v_i = v_i; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.decode_extension + +static wuffs_base__status // +wuffs_gif__decoder__decode_extension(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src) { + wuffs_base__status status = NULL; + + uint8_t v_label = 0; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + } + 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__suspension__short_read; + goto suspend; + } + uint8_t t_0 = *iop_a_src++; + v_label = t_0; + } + if (v_label == 249) { + 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) { + goto suspend; + } + status = NULL; + goto ok; + } else if (v_label == 255) { + 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) { + goto suspend; + } + 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) { + goto suspend; + } + + goto ok; + ok: + self->private_impl.p_decode_extension[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_extension[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.skip_blocks + +static wuffs_base__status // +wuffs_gif__decoder__skip_blocks(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src) { + wuffs_base__status status = NULL; + + uint8_t v_block_size = 0; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + } + 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__suspension__short_read; + goto suspend; + } + uint8_t t_0 = *iop_a_src++; + v_block_size = t_0; + } + if (v_block_size == 0) { + status = NULL; + goto ok; + } + self->private_data.s_skip_blocks[0].scratch = ((uint32_t)(v_block_size)); + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + if (self->private_data.s_skip_blocks[0].scratch > + ((uint64_t)(io2_a_src - iop_a_src))) { + self->private_data.s_skip_blocks[0].scratch -= + ((uint64_t)(io2_a_src - iop_a_src)); + iop_a_src = io2_a_src; + status = wuffs_base__suspension__short_read; + goto suspend; + } + iop_a_src += self->private_data.s_skip_blocks[0].scratch; + } + + goto ok; + ok: + self->private_impl.p_skip_blocks[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_skip_blocks[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.decode_ae + +static wuffs_base__status // +wuffs_gif__decoder__decode_ae(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src) { + wuffs_base__status status = NULL; + + uint8_t v_c = 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; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + v_block_size = self->private_data.s_decode_ae[0].v_block_size; + v_is_animexts = self->private_data.s_decode_ae[0].v_is_animexts; + v_is_netscape = self->private_data.s_decode_ae[0].v_is_netscape; + v_is_iccp = self->private_data.s_decode_ae[0].v_is_iccp; + v_is_xmp = self->private_data.s_decode_ae[0].v_is_xmp; + } + 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__suspension__short_read; + goto suspend; + } + uint8_t t_0 = *iop_a_src++; + v_block_size = t_0; + } + if (v_block_size == 0) { + status = NULL; + goto ok; + } + if (v_block_size != 11) { + self->private_data.s_decode_ae[0].scratch = ((uint32_t)(v_block_size)); + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + if (self->private_data.s_decode_ae[0].scratch > + ((uint64_t)(io2_a_src - iop_a_src))) { + self->private_data.s_decode_ae[0].scratch -= + ((uint64_t)(io2_a_src - iop_a_src)); + iop_a_src = io2_a_src; + status = wuffs_base__suspension__short_read; + goto suspend; + } + iop_a_src += self->private_data.s_decode_ae[0].scratch; + goto label_0_break; + } + v_is_animexts = true; + v_is_netscape = true; + v_is_iccp = true; + v_is_xmp = true; + v_block_size = 0; + while (v_block_size < 11) { + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint8_t t_1 = *iop_a_src++; + v_c = t_1; + } + v_is_animexts = + (v_is_animexts && (v_c == wuffs_gif__animexts1dot0[v_block_size])); + v_is_netscape = + (v_is_netscape && (v_c == wuffs_gif__netscape2dot0[v_block_size])); + v_is_iccp = + (v_is_iccp && (v_c == wuffs_gif__iccrgbg1012[v_block_size])); + v_is_xmp = (v_is_xmp && (v_c == wuffs_gif__xmpdataxmp[v_block_size])); +#if defined(__GNUC__) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wconversion" +#endif + v_block_size += 1; +#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__suspension__short_read; + goto suspend; + } + uint8_t t_2 = *iop_a_src++; + v_block_size = t_2; + } + if (v_block_size != 3) { + self->private_data.s_decode_ae[0].scratch = + ((uint32_t)(v_block_size)); + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5); + if (self->private_data.s_decode_ae[0].scratch > + ((uint64_t)(io2_a_src - iop_a_src))) { + self->private_data.s_decode_ae[0].scratch -= + ((uint64_t)(io2_a_src - iop_a_src)); + iop_a_src = io2_a_src; + status = wuffs_base__suspension__short_read; + goto suspend; + } + iop_a_src += self->private_data.s_decode_ae[0].scratch; + goto label_0_break; + } + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint8_t t_3 = *iop_a_src++; + v_c = t_3; + } + if (v_c != 1) { + self->private_data.s_decode_ae[0].scratch = 2; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); + if (self->private_data.s_decode_ae[0].scratch > + ((uint64_t)(io2_a_src - iop_a_src))) { + self->private_data.s_decode_ae[0].scratch -= + ((uint64_t)(io2_a_src - iop_a_src)); + iop_a_src = io2_a_src; + status = wuffs_base__suspension__short_read; + goto suspend; + } + iop_a_src += self->private_data.s_decode_ae[0].scratch; + goto label_0_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__load_u16le(iop_a_src))); + iop_a_src += 2; + } else { + self->private_data.s_decode_ae[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_ae[0].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 += 8; + *scratch |= ((uint64_t)(num_bits_4)) << 56; + } + } + self->private_impl.f_num_loops = t_4; + } + self->private_impl.f_seen_num_loops = true; + if ((0 < self->private_impl.f_num_loops) && + (self->private_impl.f_num_loops <= 65535)) { + self->private_impl.f_num_loops += 1; + } + } else if (self->private_impl.f_ignore_metadata) { + } else if (v_is_iccp && self->private_impl.f_report_metadata_iccp) { + while (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { + status = wuffs_base__suspension__short_read; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10); + } + self->private_impl.f_metadata_chunk_length_value = + ((uint64_t)(wuffs_base__load_u8be(iop_a_src))); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + self->private_impl.f_metadata_fourcc_value = 1229144912; + self->private_impl.f_metadata_io_position = wuffs_base__u64__sat_add( + wuffs_base__u64__sat_add(a_src->meta.pos, + ((uint64_t)(iop_a_src - io0_a_src))), + self->private_impl.f_metadata_chunk_length_value); + self->private_impl.f_call_sequence = 1; + status = wuffs_base__warning__metadata_reported; + goto ok; + } else if (v_is_xmp && self->private_impl.f_report_metadata_xmp) { + while (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { + status = wuffs_base__suspension__short_read; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(11); + } + self->private_impl.f_metadata_chunk_length_value = + ((uint64_t)(wuffs_base__load_u8be(iop_a_src))); + if (self->private_impl.f_metadata_chunk_length_value > 0) { + self->private_impl.f_metadata_chunk_length_value += 1; + } else { + (iop_a_src += 1, wuffs_base__make_empty_struct()); + } + self->private_impl.f_metadata_fourcc_value = 1481461792; + self->private_impl.f_metadata_io_position = wuffs_base__u64__sat_add( + wuffs_base__u64__sat_add(a_src->meta.pos, + ((uint64_t)(iop_a_src - io0_a_src))), + self->private_impl.f_metadata_chunk_length_value); + self->private_impl.f_call_sequence = 1; + status = wuffs_base__warning__metadata_reported; + goto ok; + } + goto label_0_break; + } + label_0_break:; + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12); + 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) { + goto suspend; + } + + goto ok; + ok: + self->private_impl.p_decode_ae[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_ae[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + self->private_data.s_decode_ae[0].v_block_size = v_block_size; + self->private_data.s_decode_ae[0].v_is_animexts = v_is_animexts; + self->private_data.s_decode_ae[0].v_is_netscape = v_is_netscape; + self->private_data.s_decode_ae[0].v_is_iccp = v_is_iccp; + self->private_data.s_decode_ae[0].v_is_xmp = v_is_xmp; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.decode_gc + +static wuffs_base__status // +wuffs_gif__decoder__decode_gc(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src) { + wuffs_base__status status = NULL; + + uint8_t v_c = 0; + uint8_t v_flags = 0; + uint16_t v_gc_duration_centiseconds = 0; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + } + 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__suspension__short_read; + goto suspend; + } + uint8_t t_0 = *iop_a_src++; + v_c = t_0; + } + if (v_c != 4) { + 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__suspension__short_read; + goto suspend; + } + uint8_t t_1 = *iop_a_src++; + v_flags = t_1; + } + self->private_impl.f_gc_has_transparent_index = ((v_flags & 1) != 0); + v_flags = ((v_flags >> 2) & 7); + if (v_flags == 2) { + self->private_impl.f_gc_disposal = 1; + } else if ((v_flags == 3) || (v_flags == 4)) { + self->private_impl.f_gc_disposal = 2; + } else { + self->private_impl.f_gc_disposal = 0; + } + { + 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__load_u16le(iop_a_src); + iop_a_src += 2; + } else { + self->private_data.s_decode_gc[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_gc[0].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 += 8; + *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)) * 7056000); + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + 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__suspension__short_read; + goto suspend; + } + uint8_t t_4 = *iop_a_src++; + v_c = t_4; + } + if (v_c != 0) { + status = wuffs_gif__error__bad_graphic_control; + goto exit; + } + + goto ok; + ok: + self->private_impl.p_decode_gc[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_gc[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.decode_id_part0 + +static wuffs_base__status // +wuffs_gif__decoder__decode_id_part0(wuffs_gif__decoder* self, + wuffs_base__io_buffer* a_src) { + wuffs_base__status status = NULL; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + } + 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__load_u16le(iop_a_src))); + iop_a_src += 2; + } else { + self->private_data.s_decode_id_part0[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_id_part0[0].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 += 8; + *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__load_u16le(iop_a_src))); + iop_a_src += 2; + } else { + self->private_data.s_decode_id_part0[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_id_part0[0].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 += 8; + *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__load_u16le(iop_a_src))); + iop_a_src += 2; + } else { + self->private_data.s_decode_id_part0[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_id_part0[0].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 += 8; + *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__load_u16le(iop_a_src))); + iop_a_src += 2; + } else { + self->private_data.s_decode_id_part0[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_id_part0[0].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 += 8; + *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_call_sequence == 0) && + !self->private_impl.f_quirk_enabled_image_bounds_are_strict) { + 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] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_id_part0[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.decode_id_part1 + +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__status 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__slice_u8 v_dst_palette = {0}; + wuffs_base__status v_status = NULL; + uint8_t v_lw = 0; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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[0]; + if (coro_susp_point) { + v_which_palette = self->private_data.s_decode_id_part1[0].v_which_palette; + v_num_palette_entries = + self->private_data.s_decode_id_part1[0].v_num_palette_entries; + v_i = self->private_data.s_decode_id_part1[0].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__suspension__short_read; + goto suspend; + } + uint8_t t_0 = *iop_a_src++; + v_flags = t_0; + } + if ((v_flags & 64) != 0) { + self->private_impl.f_interlace = 4; + } else { + self->private_impl.f_interlace = 0; + } + v_which_palette = 1; + if ((v_flags & 128) != 0) { + v_num_palette_entries = (((uint32_t)(1)) << (1 + (v_flags & 7))); + v_i = 0; + 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__load_u24be(iop_a_src))); + iop_a_src += 3; + } else { + self->private_data.s_decode_id_part1[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = + &self->private_data.s_decode_id_part1[0].scratch; + uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFF)); + *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 += 8; + *scratch |= ((uint64_t)(num_bits_1)); + } + } + v_argb = t_1; + } + v_argb |= 4278190080; + self->private_data.f_palettes[1][((4 * v_i) + 0)] = + ((uint8_t)(((v_argb >> 0) & 255))); + self->private_data.f_palettes[1][((4 * v_i) + 1)] = + ((uint8_t)(((v_argb >> 8) & 255))); + self->private_data.f_palettes[1][((4 * v_i) + 2)] = + ((uint8_t)(((v_argb >> 16) & 255))); + self->private_data.f_palettes[1][((4 * v_i) + 3)] = + ((uint8_t)(((v_argb >> 24) & 255))); + v_i += 1; + } + while (v_i < 256) { + self->private_data.f_palettes[1][((4 * v_i) + 0)] = 0; + self->private_data.f_palettes[1][((4 * v_i) + 1)] = 0; + self->private_data.f_palettes[1][((4 * v_i) + 2)] = 0; + self->private_data.f_palettes[1][((4 * v_i) + 3)] = 255; + v_i += 1; + } + } else if (self->private_impl.f_quirk_enabled_reject_empty_palette && + !self->private_impl.f_has_global_palette) { + status = wuffs_gif__error__bad_palette; + goto exit; + } else if (self->private_impl.f_gc_has_transparent_index) { + wuffs_base__slice_u8__copy_from_slice( + wuffs_base__make_slice_u8(self->private_data.f_palettes[1], 1024), + wuffs_base__make_slice_u8(self->private_data.f_palettes[0], 1024)); + } else { + v_which_palette = 0; + } + if (self->private_impl.f_gc_has_transparent_index) { + self->private_data.f_palettes[1][( + (4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 0)] = + 0; + self->private_data.f_palettes[1][( + (4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 1)] = + 0; + self->private_data.f_palettes[1][( + (4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 2)] = + 0; + self->private_data.f_palettes[1][( + (4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 3)] = + 0; + } + v_dst_palette = wuffs_base__pixel_buffer__palette(a_dst); + if (((uint64_t)(v_dst_palette.len)) == 0) { + v_dst_palette = + wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024); + } + v_status = wuffs_base__pixel_swizzler__prepare( + &self->private_impl.f_swizzler, + wuffs_base__pixel_buffer__pixel_format(a_dst), v_dst_palette, + 1191444488, + wuffs_base__make_slice_u8( + self->private_data.f_palettes[v_which_palette], 1024)); + 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__error__cannot_return_a_suspension; + goto exit; + } + goto ok; + } + if (self->private_impl.f_previous_lzw_decode_ended_abruptly) { + wuffs_base__ignore_status(wuffs_lzw__decoder__initialize( + &self->private_data.f_lzw, sizeof(wuffs_lzw__decoder), WUFFS_VERSION, + 0)); + } + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint8_t t_2 = *iop_a_src++; + v_lw = t_2; + } + if (v_lw > 8) { + status = wuffs_gif__error__bad_literal_width; + goto exit; + } + wuffs_lzw__decoder__set_literal_width(&self->private_data.f_lzw, + ((uint32_t)(v_lw))); + self->private_impl.f_previous_lzw_decode_ended_abruptly = true; + + goto ok; + ok: + self->private_impl.p_decode_id_part1[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_id_part1[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + self->private_data.s_decode_id_part1[0].v_which_palette = v_which_palette; + self->private_data.s_decode_id_part1[0].v_num_palette_entries = + v_num_palette_entries; + self->private_data.s_decode_id_part1[0].v_i = v_i; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.decode_id_part2 + +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 = NULL; + + uint64_t v_block_size = 0; + bool v_need_block_size = false; + uint64_t v_n_compressed = 0; + wuffs_base__slice_u8 v_compressed = {0}; + wuffs_base__io_buffer u_r = wuffs_base__empty_io_buffer(); + wuffs_base__io_buffer* v_r = &u_r; + uint8_t* iop_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io0_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint64_t v_mark = 0; + wuffs_base__status v_lzw_status = NULL; + wuffs_base__status v_copy_status = NULL; + wuffs_base__slice_u8 v_uncompressed = {0}; + + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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; + } + + wuffs_base__io_buffer empty_io_buffer = wuffs_base__empty_io_buffer(); + + uint32_t coro_susp_point = self->private_impl.p_decode_id_part2[0]; + if (coro_susp_point) { + v_block_size = self->private_data.s_decode_id_part2[0].v_block_size; + v_need_block_size = + self->private_data.s_decode_id_part2[0].v_need_block_size; + v_lzw_status = self->private_data.s_decode_id_part2[0].v_lzw_status; + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + v_need_block_size = true; + label_0_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__suspension__short_read; + goto suspend; + } + uint64_t t_0 = *iop_a_src++; + v_block_size = t_0; + } + } + if (v_block_size == 0) { + goto label_0_break; + } + while (((uint64_t)(io2_a_src - iop_a_src)) == 0) { + 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 = 0; + self->private_impl.f_compressed_wi = 0; + } + while (self->private_impl.f_compressed_wi <= 3841) { + v_n_compressed = wuffs_base__u64__min( + v_block_size, ((uint64_t)(io2_a_src - iop_a_src))); + if (v_n_compressed <= 0) { + goto label_1_break; + } + v_compressed = + wuffs_base__io_reader__take(&iop_a_src, io2_a_src, v_n_compressed); + wuffs_base__slice_u8__copy_from_slice( + wuffs_base__slice_u8__subslice_i( + wuffs_base__make_slice_u8(self->private_data.f_compressed, + 4096), + self->private_impl.f_compressed_wi), + v_compressed); + wuffs_base__u64__sat_add_indirect(&self->private_impl.f_compressed_wi, + v_n_compressed); + wuffs_base__u64__sat_sub_indirect(&v_block_size, v_n_compressed); + if (v_block_size > 0) { + goto label_1_break; + } + if (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { + v_need_block_size = true; + goto label_1_break; + } + v_block_size = ((uint64_t)(wuffs_base__load_u8be(iop_a_src))); + (iop_a_src += 1, wuffs_base__make_empty_struct()); + } + label_1_break:; + if (1 > ((uint64_t)(a_workbuf.len))) { + status = wuffs_base__error__bad_workbuf_length; + goto exit; + } + label_2_continue:; + while (true) { + if ((self->private_impl.f_compressed_ri > + self->private_impl.f_compressed_wi) || + (self->private_impl.f_compressed_wi > 4096)) { + status = wuffs_gif__error__internal_error_inconsistent_ri_wi; + goto exit; + } + { + wuffs_base__io_buffer* o_0_v_r = v_r; + uint8_t* o_0_iop_v_r = iop_v_r; + uint8_t* o_0_io0_v_r = io0_v_r; + uint8_t* o_0_io1_v_r = io1_v_r; + uint8_t* o_0_io2_v_r = io2_v_r; + v_r = wuffs_base__io_reader__set( + &u_r, &iop_v_r, &io0_v_r, &io1_v_r, &io2_v_r, + wuffs_base__slice_u8__subslice_ij( + wuffs_base__make_slice_u8(self->private_data.f_compressed, + 4096), + self->private_impl.f_compressed_ri, + self->private_impl.f_compressed_wi)); + v_mark = ((uint64_t)(iop_v_r - io0_v_r)); + { + u_r.meta.ri = ((size_t)(iop_v_r - u_r.data.ptr)); + wuffs_base__status t_1 = wuffs_lzw__decoder__decode_io_writer( + &self->private_data.f_lzw, &empty_io_buffer, v_r, + wuffs_base__utility__empty_slice_u8()); + iop_v_r = u_r.data.ptr + u_r.meta.ri; + v_lzw_status = t_1; + } + wuffs_base__u64__sat_add_indirect( + &self->private_impl.f_compressed_ri, + wuffs_base__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; + } + v_uncompressed = wuffs_lzw__decoder__flush(&self->private_data.f_lzw); + if (((uint64_t)(v_uncompressed.len)) > 0) { + v_copy_status = wuffs_gif__decoder__copy_to_image_buffer( + self, a_dst, v_uncompressed); + if (wuffs_base__status__is_error(v_copy_status)) { + status = v_copy_status; + goto exit; + } + } + if (wuffs_base__status__is_ok(v_lzw_status)) { + self->private_impl.f_previous_lzw_decode_ended_abruptly = false; + if (v_need_block_size || (v_block_size > 0)) { + self->private_data.s_decode_id_part2[0].scratch = + ((uint32_t)(v_block_size)); + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); + if (self->private_data.s_decode_id_part2[0].scratch > + ((uint64_t)(io2_a_src - iop_a_src))) { + self->private_data.s_decode_id_part2[0].scratch -= + ((uint64_t)(io2_a_src - iop_a_src)); + iop_a_src = io2_a_src; + status = wuffs_base__suspension__short_read; + goto suspend; + } + iop_a_src += self->private_data.s_decode_id_part2[0].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) { + goto suspend; + } + } + goto label_0_break; + } else if (v_lzw_status == wuffs_base__suspension__short_read) { + goto label_0_continue; + } else if (v_lzw_status == wuffs_base__suspension__short_write) { + goto label_2_continue; + } + status = v_lzw_status; + if (wuffs_base__status__is_error(status)) { + goto exit; + } else if (wuffs_base__status__is_suspension(status)) { + status = wuffs_base__error__cannot_return_a_suspension; + goto exit; + } + goto ok; + } + } + label_0_break:; + self->private_impl.f_compressed_ri = 0; + self->private_impl.f_compressed_wi = 0; + 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__error__not_enough_data; + goto exit; + } + + goto ok; + ok: + self->private_impl.p_decode_id_part2[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_id_part2[0] = + wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; + self->private_data.s_decode_id_part2[0].v_block_size = v_block_size; + self->private_data.s_decode_id_part2[0].v_need_block_size = v_need_block_size; + self->private_data.s_decode_id_part2[0].v_lzw_status = v_lzw_status; + + goto exit; +exit: + if (a_src) { + a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); + } + + return status; +} + +// -------- func gif.decoder.copy_to_image_buffer + +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; + uint32_t v_bytes_per_pixel = 0; + uint32_t v_pixfmt_channels = 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_channels = (wuffs_base__pixel_buffer__pixel_format(a_pb) & 65535); + if (v_pixfmt_channels == 34952) { + v_bytes_per_pixel = 4; + } else if (v_pixfmt_channels == 2184) { + v_bytes_per_pixel = 3; + } else if (v_pixfmt_channels == 8) { + v_bytes_per_pixel = 1; + } else { + return wuffs_base__error__unsupported_option; + } + v_width_in_bytes = (((uint64_t)(self->private_impl.f_width)) * + ((uint64_t)(v_bytes_per_pixel))); + v_tab = wuffs_base__pixel_buffer__plane(a_pb, 0); +label_0_continue:; + 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_quirk_enabled_ignore_too_much_pixel_data) { + return NULL; + } + return wuffs_base__error__too_much_data; + } + v_dst = wuffs_base__table_u8__row(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, 0); + } 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( + &self->private_impl.f_swizzler, v_dst, + wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024), + v_src); + wuffs_base__u64__sat_add_indirect(&v_src_ri, v_n); + wuffs_base__u32__sat_add_indirect(&self->private_impl.f_dst_x, + ((uint32_t)((v_n & 4294967295)))); + 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, 1)); + } + 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 == 0) { + wuffs_base__u32__sat_add_indirect(&self->private_impl.f_dst_y, 1); + goto label_0_continue; + } + if ((self->private_impl.f_num_decoded_frames_value == 0) && + !self->private_impl.f_gc_has_transparent_index && + (self->private_impl.f_interlace > 1)) { + v_replicate_src = + wuffs_base__table_u8__row(v_tab, self->private_impl.f_dst_y); + v_replicate_y0 = + wuffs_base__u32__sat_add(self->private_impl.f_dst_y, 1); + 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_base__table_u8__row(v_tab, v_replicate_y0); + wuffs_base__slice_u8__copy_from_slice(v_replicate_dst, + v_replicate_src); + v_replicate_y0 += 1; + } + self->private_impl.f_dirty_max_excl_y = wuffs_base__u32__max( + self->private_impl.f_dirty_max_excl_y, v_replicate_y1); + } + wuffs_base__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 > 0) && + (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 -= 1; +#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]); + } + goto label_0_continue; + } + if (((uint64_t)(a_src.len)) == v_src_ri) { + goto label_0_break; + } else if (((uint64_t)(a_src.len)) < v_src_ri) { + return wuffs_gif__error__internal_error_inconsistent_ri_wi; + } + 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_base__u64__sat_add_indirect(&v_src_ri, v_n); + wuffs_base__u32__sat_add_indirect(&self->private_impl.f_dst_x, + ((uint32_t)((v_n & 4294967295)))); + 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_base__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 > 0) && + (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 -= 1; +#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]); + } + goto label_0_continue; + } + if (v_src_ri != ((uint64_t)(a_src.len))) { + return wuffs_gif__error__internal_error_inconsistent_ri_wi; + } + goto label_0_break; + } +label_0_break:; + return NULL; +} + +#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"; + +// ---------------- Private Consts + +// ---------------- Private Initializer Prototypes + +// ---------------- Private Function Prototypes + +// ---------------- 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 initialize_flags) { + if (!self) { + return wuffs_base__error__bad_receiver; + } + if (sizeof(*self) != sizeof_star_self) { + return wuffs_base__error__bad_sizeof_receiver; + } + if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || + (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { + return wuffs_base__error__bad_wuffs_version; + } + + if ((initialize_flags & 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__error__initialize_falsely_claimed_already_zeroed; + } +#if !defined(__clang__) && defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + } else { + if ((initialize_flags & + WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { + memset(self, 0, sizeof(*self)); + initialize_flags |= 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, initialize_flags); + if (z) { + return z; + } + } + { + wuffs_base__status z = wuffs_deflate__decoder__initialize( + &self->private_data.f_flate, sizeof(self->private_data.f_flate), + WUFFS_VERSION, initialize_flags); + if (z) { + return z; + } + } + self->private_impl.magic = WUFFS_BASE__MAGIC; + return NULL; +} + +size_t // +sizeof__wuffs_gzip__decoder() { + return sizeof(wuffs_gzip__decoder); +} + +// ---------------- Function Implementations + +// -------- func gzip.decoder.set_ignore_checksum + +WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // +wuffs_gzip__decoder__set_ignore_checksum(wuffs_gzip__decoder* self, bool a_ic) { + if (!self) { + return wuffs_base__make_empty_struct(); + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return wuffs_base__make_empty_struct(); + } + + self->private_impl.f_ignore_checksum = a_ic; + return wuffs_base__make_empty_struct(); +} + +// -------- func gzip.decoder.workbuf_len + +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__make_range_ii_u64(0, 0); + } + if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && + (self->private_impl.magic != WUFFS_BASE__DISABLED)) { + return wuffs_base__utility__make_range_ii_u64(0, 0); + } + + return wuffs_base__utility__make_range_ii_u64(1, 1); +} + +// -------- func gzip.decoder.decode_io_writer + +WUFFS_BASE__MAYBE_STATIC wuffs_base__status // +wuffs_gzip__decoder__decode_io_writer(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__error__bad_receiver; + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return (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__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__error__interleaved_coroutine_calls; + } + self->private_impl.active_coroutine = 0; + wuffs_base__status status = NULL; + + uint8_t v_c = 0; + uint8_t v_flags = 0; + uint16_t v_xlen = 0; + uint64_t v_mark = 0; + uint32_t v_checksum_got = 0; + uint32_t v_decoded_length_got = 0; + wuffs_base__status v_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) { + 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; + } + } + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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_io_writer[0]; + if (coro_susp_point) { + v_flags = self->private_data.s_decode_io_writer[0].v_flags; + v_checksum_got = self->private_data.s_decode_io_writer[0].v_checksum_got; + v_decoded_length_got = + self->private_data.s_decode_io_writer[0].v_decoded_length_got; + v_checksum_want = self->private_data.s_decode_io_writer[0].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__suspension__short_read; + goto suspend; + } + uint8_t t_0 = *iop_a_src++; + v_c = t_0; + } + if (v_c != 31) { + 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__suspension__short_read; + goto suspend; + } + uint8_t t_1 = *iop_a_src++; + v_c = t_1; + } + if (v_c != 139) { + 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__suspension__short_read; + goto suspend; + } + uint8_t t_2 = *iop_a_src++; + v_c = t_2; + } + if (v_c != 8) { + 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__suspension__short_read; + goto suspend; + } + uint8_t t_3 = *iop_a_src++; + v_flags = t_3; + } + self->private_data.s_decode_io_writer[0].scratch = 6; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5); + if (self->private_data.s_decode_io_writer[0].scratch > + ((uint64_t)(io2_a_src - iop_a_src))) { + self->private_data.s_decode_io_writer[0].scratch -= + ((uint64_t)(io2_a_src - iop_a_src)); + iop_a_src = io2_a_src; + status = wuffs_base__suspension__short_read; + goto suspend; + } + iop_a_src += self->private_data.s_decode_io_writer[0].scratch; + if ((v_flags & 4) != 0) { + { + 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__load_u16le(iop_a_src); + iop_a_src += 2; + } else { + self->private_data.s_decode_io_writer[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = + &self->private_data.s_decode_io_writer[0].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 += 8; + *scratch |= ((uint64_t)(num_bits_4)) << 56; + } + } + v_xlen = t_4; + } + self->private_data.s_decode_io_writer[0].scratch = ((uint32_t)(v_xlen)); + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8); + if (self->private_data.s_decode_io_writer[0].scratch > + ((uint64_t)(io2_a_src - iop_a_src))) { + self->private_data.s_decode_io_writer[0].scratch -= + ((uint64_t)(io2_a_src - iop_a_src)); + iop_a_src = io2_a_src; + status = wuffs_base__suspension__short_read; + goto suspend; + } + iop_a_src += self->private_data.s_decode_io_writer[0].scratch; + } + if ((v_flags & 8) != 0) { + while (true) { + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint8_t t_5 = *iop_a_src++; + v_c = t_5; + } + if (v_c == 0) { + goto label_0_break; + } + } + label_0_break:; + } + if ((v_flags & 16) != 0) { + while (true) { + { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10); + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint8_t t_6 = *iop_a_src++; + v_c = t_6; + } + if (v_c == 0) { + goto label_1_break; + } + } + label_1_break:; + } + if ((v_flags & 2) != 0) { + self->private_data.s_decode_io_writer[0].scratch = 2; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11); + if (self->private_data.s_decode_io_writer[0].scratch > + ((uint64_t)(io2_a_src - iop_a_src))) { + self->private_data.s_decode_io_writer[0].scratch -= + ((uint64_t)(io2_a_src - iop_a_src)); + iop_a_src = io2_a_src; + status = wuffs_base__suspension__short_read; + goto suspend; + } + iop_a_src += self->private_data.s_decode_io_writer[0].scratch; + } + if ((v_flags & 224) != 0) { + 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__decode_io_writer( + &self->private_data.f_flate, a_dst, a_src, a_workbuf); + 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; + } + v_status = t_7; + } + if (!self->private_impl.f_ignore_checksum) { + v_checksum_got = wuffs_crc32__ieee_hasher__update_u32( + &self->private_data.f_checksum, + wuffs_base__io__since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)), + io0_a_dst)); + v_decoded_length_got += + ((uint32_t)((wuffs_base__io__count_since( + v_mark, ((uint64_t)(iop_a_dst - io0_a_dst))) & + 4294967295))); + } + if (wuffs_base__status__is_ok(v_status)) { + goto label_2_break; + } + status = v_status; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(12); + } + label_2_break:; + { + 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__load_u32le(iop_a_src); + iop_a_src += 4; + } else { + self->private_data.s_decode_io_writer[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_io_writer[0].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 += 8; + *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__load_u32le(iop_a_src); + iop_a_src += 4; + } else { + self->private_data.s_decode_io_writer[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_io_writer[0].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 += 8; + *scratch |= ((uint64_t)(num_bits_9)) << 56; + } + } + v_decoded_length_want = t_9; + } + if (!self->private_impl.f_ignore_checksum && + ((v_checksum_got != v_checksum_want) || + (v_decoded_length_got != v_decoded_length_want))) { + status = wuffs_gzip__error__bad_checksum; + goto exit; + } + + goto ok; + ok: + self->private_impl.p_decode_io_writer[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_io_writer[0] = + 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_io_writer[0].v_flags = v_flags; + self->private_data.s_decode_io_writer[0].v_checksum_got = v_checksum_got; + self->private_data.s_decode_io_writer[0].v_decoded_length_got = + v_decoded_length_got; + self->private_data.s_decode_io_writer[0].v_checksum_want = v_checksum_want; + + goto exit; +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)); + } + + 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__GZIP) + +#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ZLIB) + +// ---------------- Status Codes Implementations + +const char* wuffs_zlib__warning__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"; + +// ---------------- Private Consts + +// ---------------- Private Initializer Prototypes + +// ---------------- Private Function Prototypes + +// ---------------- 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 initialize_flags) { + if (!self) { + return wuffs_base__error__bad_receiver; + } + if (sizeof(*self) != sizeof_star_self) { + return wuffs_base__error__bad_sizeof_receiver; + } + if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || + (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { + return wuffs_base__error__bad_wuffs_version; + } + + if ((initialize_flags & 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__error__initialize_falsely_claimed_already_zeroed; + } +#if !defined(__clang__) && defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + } else { + if ((initialize_flags & + WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { + memset(self, 0, sizeof(*self)); + initialize_flags |= 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, initialize_flags); + if (z) { + 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, + initialize_flags); + if (z) { + return z; + } + } + { + wuffs_base__status z = wuffs_deflate__decoder__initialize( + &self->private_data.f_flate, sizeof(self->private_data.f_flate), + WUFFS_VERSION, initialize_flags); + if (z) { + return z; + } + } + self->private_impl.magic = WUFFS_BASE__MAGIC; + return NULL; +} + +size_t // +sizeof__wuffs_zlib__decoder() { + return sizeof(wuffs_zlib__decoder); +} + +// ---------------- Function Implementations + +// -------- func zlib.decoder.dictionary_id + +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__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_got = 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.set_ignore_checksum + +WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // +wuffs_zlib__decoder__set_ignore_checksum(wuffs_zlib__decoder* self, bool a_ic) { + if (!self) { + return wuffs_base__make_empty_struct(); + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return wuffs_base__make_empty_struct(); + } + + self->private_impl.f_ignore_checksum = a_ic; + return wuffs_base__make_empty_struct(); +} + +// -------- func zlib.decoder.workbuf_len + +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__make_range_ii_u64(0, 0); + } + if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && + (self->private_impl.magic != WUFFS_BASE__DISABLED)) { + return wuffs_base__utility__make_range_ii_u64(0, 0); + } + + return wuffs_base__utility__make_range_ii_u64(1, 1); +} + +// -------- func zlib.decoder.decode_io_writer + +WUFFS_BASE__MAYBE_STATIC wuffs_base__status // +wuffs_zlib__decoder__decode_io_writer(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__error__bad_receiver; + } + if (self->private_impl.magic != WUFFS_BASE__MAGIC) { + return (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__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__error__interleaved_coroutine_calls; + } + self->private_impl.active_coroutine = 0; + wuffs_base__status status = NULL; + + uint16_t v_x = 0; + uint32_t v_checksum_got = 0; + wuffs_base__status v_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) { + 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; + } + } + uint8_t* iop_a_src = NULL; + uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; + if (a_src) { + 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_io_writer[0]; + if (coro_susp_point) { + v_checksum_got = self->private_data.s_decode_io_writer[0].v_checksum_got; + } + switch (coro_susp_point) { + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; + + if (self->private_impl.f_bad_call_sequence) { + status = wuffs_base__error__bad_call_sequence; + goto exit; + } 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__load_u16be(iop_a_src); + iop_a_src += 2; + } else { + self->private_data.s_decode_io_writer[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = + &self->private_data.s_decode_io_writer[0].scratch; + uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFF)); + *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 += 8; + *scratch |= ((uint64_t)(num_bits_0)); + } + } + v_x = t_0; + } + if (((v_x >> 8) & 15) != 8) { + status = wuffs_zlib__error__bad_compression_method; + goto exit; + } + if ((v_x >> 12) > 7) { + status = wuffs_zlib__error__bad_compression_window_size; + goto exit; + } + if ((v_x % 31) != 0) { + status = wuffs_zlib__error__bad_parity_check; + goto exit; + } + self->private_impl.f_want_dictionary = ((v_x & 32) != 0); + if (self->private_impl.f_want_dictionary) { + self->private_impl.f_dict_id_got = 1; + { + 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__load_u32be(iop_a_src); + iop_a_src += 4; + } else { + self->private_data.s_decode_io_writer[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = + &self->private_data.s_decode_io_writer[0].scratch; + uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFF)); + *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 += 8; + *scratch |= ((uint64_t)(num_bits_1)); + } + } + self->private_impl.f_dict_id_want = t_1; + } + status = wuffs_zlib__warning__dictionary_required; + goto ok; + } else if (self->private_impl.f_got_dictionary) { + status = wuffs_zlib__error__incorrect_dictionary; + goto exit; + } + } else if (self->private_impl.f_dict_id_got != + self->private_impl.f_dict_id_want) { + if (self->private_impl.f_got_dictionary) { + status = wuffs_zlib__error__incorrect_dictionary; + goto exit; + } + status = wuffs_zlib__warning__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__decode_io_writer( + &self->private_data.f_flate, a_dst, a_src, a_workbuf); + 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; + } + v_status = t_2; + } + if (!self->private_impl.f_ignore_checksum) { + v_checksum_got = wuffs_adler32__hasher__update_u32( + &self->private_data.f_checksum, + wuffs_base__io__since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)), + io0_a_dst)); + } + if (wuffs_base__status__is_ok(v_status)) { + goto label_0_break; + } + status = v_status; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5); + } + label_0_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__load_u32be(iop_a_src); + iop_a_src += 4; + } else { + self->private_data.s_decode_io_writer[0].scratch = 0; + WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); + while (true) { + if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { + status = wuffs_base__suspension__short_read; + goto suspend; + } + uint64_t* scratch = &self->private_data.s_decode_io_writer[0].scratch; + uint32_t num_bits_3 = ((uint32_t)(*scratch & 0xFF)); + *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 += 8; + *scratch |= ((uint64_t)(num_bits_3)); + } + } + v_checksum_want = t_3; + } + if (!self->private_impl.f_ignore_checksum && + (v_checksum_got != v_checksum_want)) { + status = wuffs_zlib__error__bad_checksum; + goto exit; + } + + goto ok; + ok: + self->private_impl.p_decode_io_writer[0] = 0; + goto exit; + } + + goto suspend; +suspend: + self->private_impl.p_decode_io_writer[0] = + 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_io_writer[0].v_checksum_got = v_checksum_got; + + goto exit; +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)); + } + + 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__ZLIB) + +#endif // WUFFS_IMPLEMENTATION + +#endif // WUFFS_INCLUDE_GUARD diff --git a/sync.txt b/sync.txt new file mode 100644 index 0000000..961ba1a --- /dev/null +++ b/sync.txt @@ -0,0 +1,6 @@ +script/sync.sh ran on 2021-03-12 +Sibling directory (../wuffs) git revision is 5767f030a37032c0f39eac0c89d8292238d358cf +Manifest (sha512sum values, filenames, versions): +4be987ec98507b4df36d9795510830a7f4890e1d14953f589028cfb5291b60c115bcf0f9db128d4980e31d7945145095ad86d4647f2668008ec282fdd3c70e52 release/c/README.md +542abc35ca1b6112a2859ff6f89de6210590515c67551ac972da053e036f7e8c92953ee0d6b40c0555e536bde7d137058a2a4648e36916e1a763bbadfb192d64 release/c/wuffs-v0.2.c + #define WUFFS_VERSION_STRING "0.2.0+2078.20191219" |