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fuchsia / third_party / wuffs / 705a84723ab2b70a42cd7f687e22ca6ff3dd21f4 / . / release / c / wuffs-unsupported-snapshot.c
blob: f52ed58748fc946448163d3832b646d245fbc4fa [file] [log] [blame]
#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>
#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.
//
// !! Some code generation programs can override WUFFS_VERSION.
#define WUFFS_VERSION ((uint64_t)0)
#define WUFFS_VERSION_MAJOR ((uint64_t)0)
#define WUFFS_VERSION_MINOR ((uint64_t)0)
#define WUFFS_VERSION_PATCH ((uint64_t)0)
#define WUFFS_VERSION_PRE_RELEASE_LABEL "work.in.progress"
#define WUFFS_VERSION_BUILD_METADATA_COMMIT_COUNT 0
#define WUFFS_VERSION_BUILD_METADATA_COMMIT_DATE 0
#define WUFFS_VERSION_STRING "0.0.0+0.00000000"
// 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
// Clang also defines "__GNUC__".
#if defined(__GNUC__)
#define WUFFS_BASE__WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#else
#define WUFFS_BASE__WARN_UNUSED_RESULT
#endif
// wuffs_base__empty_struct is used when a Wuffs function returns an empty
// struct. In C, if a function f returns void, you can't say "x = f()", but in
// Wuffs, if a function g returns empty, you can say "y = g()".
typedef struct {
// 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;
// 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;
// --------
// A status is either NULL (meaning OK) or a string message. That message is
// human-readable, for programmers, but it is not for end users. It is not
// localized, and does not contain additional contextual information such as a
// source filename.
//
// Status strings are statically allocated and should never be free'd. They can
// be compared by the == operator and not just by strcmp.
//
// Statuses come in four categories:
// - OK: the request was completed, successfully.
// - Warnings: the request was completed, unsuccessfully.
// - Suspensions: the request was not completed, but can be re-tried.
// - Errors: the request was not completed, permanently.
//
// When a function returns an incomplete status, a suspension means that that
// function should be called again within a new context, such as after flushing
// or re-filling an I/O buffer. An error means that an irrecoverable failure
// state was reached.
typedef const char* wuffs_base__status;
extern const char* wuffs_base__warning__end_of_data;
extern const char* wuffs_base__suspension__short_read;
extern const char* wuffs_base__suspension__short_write;
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__check_wuffs_version_not_applicable;
extern const char* wuffs_base__error__check_wuffs_version_missing;
extern const char* wuffs_base__error__disabled_by_previous_error;
extern const char* wuffs_base__error__interleaved_coroutine_calls;
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 != '?');
}
// --------
// 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 = x + y;
res |= -(res < x);
return res;
}
static inline uint8_t //
wuffs_base__u8__sat_sub(uint8_t x, uint8_t y) {
uint8_t res = x - y;
res &= -(res <= x);
return res;
}
static inline uint16_t //
wuffs_base__u16__sat_add(uint16_t x, uint16_t y) {
uint16_t res = x + y;
res |= -(res < x);
return res;
}
static inline uint16_t //
wuffs_base__u16__sat_sub(uint16_t x, uint16_t y) {
uint16_t res = x - y;
res &= -(res <= x);
return res;
}
static inline uint32_t //
wuffs_base__u32__sat_add(uint32_t x, uint32_t y) {
uint32_t res = x + y;
res |= -(res < x);
return res;
}
static inline uint32_t //
wuffs_base__u32__sat_sub(uint32_t x, uint32_t y) {
uint32_t res = x - y;
res &= -(res <= x);
return res;
}
static inline uint64_t //
wuffs_base__u64__sat_add(uint64_t x, uint64_t y) {
uint64_t res = x + y;
res |= -(res < x);
return res;
}
static inline uint64_t //
wuffs_base__u64__sat_sub(uint64_t x, uint64_t y) {
uint64_t res = x - y;
res &= -(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;
// 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__slice_u8){
.ptr = s.ptr + i,
.len = s.len - i,
});
}
return ((wuffs_base__slice_u8){});
}
// wuffs_base__slice_u8__subslice_j returns s[:j].
//
// It returns an empty slice if j is out of bounds.
static inline wuffs_base__slice_u8 //
wuffs_base__slice_u8__subslice_j(wuffs_base__slice_u8 s, uint64_t j) {
if ((j <= SIZE_MAX) && (j <= s.len)) {
return ((wuffs_base__slice_u8){
.ptr = s.ptr,
.len = j,
});
}
return ((wuffs_base__slice_u8){});
}
// wuffs_base__slice_u8__subslice_ij returns s[i:j].
//
// It returns an empty slice if i or j is out of bounds.
static inline wuffs_base__slice_u8 //
wuffs_base__slice_u8__subslice_ij(wuffs_base__slice_u8 s,
uint64_t i,
uint64_t j) {
if ((i <= j) && (j <= SIZE_MAX) && (j <= s.len)) {
return ((wuffs_base__slice_u8){
.ptr = s.ptr + i,
.len = j - i,
});
}
return ((wuffs_base__slice_u8){});
}
// ---------------- Ranges and Rects
// Ranges are either inclusive ("range_ii") or exclusive ("range_ie") on the
// high end. Both the "ii" and "ie" flavors are useful in practice.
//
// The "ei" and "ee" flavors also exist in theory, but aren't widely used. In
// Wuffs, the low end is always inclusive.
//
// The "ii" (closed interval) flavor is useful when refining e.g. "the set of
// all uint32_t values" to a contiguous subset: "uint32_t values in the closed
// interval [M, N]", for uint32_t values M and N. An unrefined type (in other
// words, the set of all uint32_t values) is not representable in the "ie"
// flavor because if N equals ((1<<32) - 1) then (N + 1) will overflow.
//
// On the other hand, the "ie" (half-open interval) flavor is recommended by
// Dijkstra's "Why numbering should start at zero" at
// http://www.cs.utexas.edu/users/EWD/ewd08xx/EWD831.PDF and a further
// discussion of motivating rationale is at
// https://www.quora.com/Why-are-Python-ranges-half-open-exclusive-instead-of-closed-inclusive
//
// For example, with "ie", the number of elements in "uint32_t values in the
// half-open interval [M, N)" is equal to max(0, N-M). Furthermore, that number
// of elements (in one dimension, a length, in two dimensions, a width or
// height) is itself representable as a uint32_t without overflow, again for
// uint32_t values M and N. In the contrasting "ii" flavor, the length of the
// closed interval [0, (1<<32) - 1] is 1<<32, which cannot be represented as a
// uint32_t. In Wuffs, because of this potential overflow, the "ie" flavor has
// length / width / height methods, but the "ii" flavor does not.
//
// It is valid for min > max (for range_ii) or for min >= max (for range_ie),
// in which case the range is empty. There are multiple representations of an
// empty range.
typedef struct wuffs_base__range_ii_u32__struct {
uint32_t min_incl;
uint32_t max_incl;
#ifdef __cplusplus
inline bool is_empty();
inline bool equals(wuffs_base__range_ii_u32__struct s);
inline bool contains(uint32_t x);
inline wuffs_base__range_ii_u32__struct intersect(
wuffs_base__range_ii_u32__struct s);
inline wuffs_base__range_ii_u32__struct unite(
wuffs_base__range_ii_u32__struct s);
#endif // __cplusplus
} wuffs_base__range_ii_u32;
static inline bool //
wuffs_base__range_ii_u32__is_empty(wuffs_base__range_ii_u32* r) {
return r->min_incl > r->max_incl;
}
static inline bool //
wuffs_base__range_ii_u32__equals(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 bool //
wuffs_base__range_ii_u32__contains(wuffs_base__range_ii_u32* r, uint32_t x) {
return (r->min_incl <= x) && (x <= r->max_incl);
}
static inline //
wuffs_base__range_ii_u32
wuffs_base__range_ii_u32__intersect(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(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;
}
#ifdef __cplusplus
inline bool //
wuffs_base__range_ii_u32::is_empty() {
return wuffs_base__range_ii_u32__is_empty(this);
}
inline bool //
wuffs_base__range_ii_u32::equals(wuffs_base__range_ii_u32 s) {
return wuffs_base__range_ii_u32__equals(this, s);
}
inline bool //
wuffs_base__range_ii_u32::contains(uint32_t x) {
return wuffs_base__range_ii_u32__contains(this, x);
}
inline wuffs_base__range_ii_u32 //
wuffs_base__range_ii_u32::intersect(wuffs_base__range_ii_u32 s) {
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) {
return wuffs_base__range_ii_u32__unite(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();
inline bool equals(wuffs_base__range_ie_u32__struct s);
inline bool contains(uint32_t x);
inline wuffs_base__range_ie_u32__struct intersect(
wuffs_base__range_ie_u32__struct s);
inline wuffs_base__range_ie_u32__struct unite(
wuffs_base__range_ie_u32__struct s);
inline uint32_t length();
#endif // __cplusplus
} wuffs_base__range_ie_u32;
static inline bool //
wuffs_base__range_ie_u32__is_empty(wuffs_base__range_ie_u32* r) {
return r->min_incl >= r->max_excl;
}
static inline bool //
wuffs_base__range_ie_u32__equals(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 bool //
wuffs_base__range_ie_u32__contains(wuffs_base__range_ie_u32* r, uint32_t x) {
return (r->min_incl <= x) && (x < r->max_excl);
}
static inline wuffs_base__range_ie_u32 //
wuffs_base__range_ie_u32__intersect(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(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 uint32_t //
wuffs_base__range_ie_u32__length(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() {
return wuffs_base__range_ie_u32__is_empty(this);
}
inline bool //
wuffs_base__range_ie_u32::equals(wuffs_base__range_ie_u32 s) {
return wuffs_base__range_ie_u32__equals(this, s);
}
inline bool //
wuffs_base__range_ie_u32::contains(uint32_t x) {
return wuffs_base__range_ie_u32__contains(this, x);
}
inline wuffs_base__range_ie_u32 //
wuffs_base__range_ie_u32::intersect(wuffs_base__range_ie_u32 s) {
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) {
return wuffs_base__range_ie_u32__unite(this, s);
}
inline uint32_t //
wuffs_base__range_ie_u32::length() {
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();
inline bool equals(wuffs_base__range_ii_u64__struct s);
inline bool contains(uint64_t x);
inline wuffs_base__range_ii_u64__struct intersect(
wuffs_base__range_ii_u64__struct s);
inline wuffs_base__range_ii_u64__struct unite(
wuffs_base__range_ii_u64__struct s);
#endif // __cplusplus
} wuffs_base__range_ii_u64;
static inline bool //
wuffs_base__range_ii_u64__is_empty(wuffs_base__range_ii_u64* r) {
return r->min_incl > r->max_incl;
}
static inline bool //
wuffs_base__range_ii_u64__equals(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 bool //
wuffs_base__range_ii_u64__contains(wuffs_base__range_ii_u64* r, uint64_t x) {
return (r->min_incl <= x) && (x <= r->max_incl);
}
static inline wuffs_base__range_ii_u64 //
wuffs_base__range_ii_u64__intersect(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(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;
}
#ifdef __cplusplus
inline bool //
wuffs_base__range_ii_u64::is_empty() {
return wuffs_base__range_ii_u64__is_empty(this);
}
inline bool //
wuffs_base__range_ii_u64::equals(wuffs_base__range_ii_u64 s) {
return wuffs_base__range_ii_u64__equals(this, s);
}
inline bool //
wuffs_base__range_ii_u64::contains(uint64_t x) {
return wuffs_base__range_ii_u64__contains(this, x);
}
inline wuffs_base__range_ii_u64 //
wuffs_base__range_ii_u64::intersect(wuffs_base__range_ii_u64 s) {
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) {
return wuffs_base__range_ii_u64__unite(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();
inline bool equals(wuffs_base__range_ie_u64__struct s);
inline bool contains(uint64_t x);
inline wuffs_base__range_ie_u64__struct intersect(
wuffs_base__range_ie_u64__struct s);
inline wuffs_base__range_ie_u64__struct unite(
wuffs_base__range_ie_u64__struct s);
inline uint64_t length();
#endif // __cplusplus
} wuffs_base__range_ie_u64;
static inline bool //
wuffs_base__range_ie_u64__is_empty(wuffs_base__range_ie_u64* r) {
return r->min_incl >= r->max_excl;
}
static inline bool //
wuffs_base__range_ie_u64__equals(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 bool //
wuffs_base__range_ie_u64__contains(wuffs_base__range_ie_u64* r, uint64_t x) {
return (r->min_incl <= x) && (x < r->max_excl);
}
static inline wuffs_base__range_ie_u64 //
wuffs_base__range_ie_u64__intersect(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(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 uint64_t //
wuffs_base__range_ie_u64__length(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() {
return wuffs_base__range_ie_u64__is_empty(this);
}
inline bool //
wuffs_base__range_ie_u64::equals(wuffs_base__range_ie_u64 s) {
return wuffs_base__range_ie_u64__equals(this, s);
}
inline bool //
wuffs_base__range_ie_u64::contains(uint64_t x) {
return wuffs_base__range_ie_u64__contains(this, x);
}
inline wuffs_base__range_ie_u64 //
wuffs_base__range_ie_u64::intersect(wuffs_base__range_ie_u64 s) {
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) {
return wuffs_base__range_ie_u64__unite(this, s);
}
inline uint64_t //
wuffs_base__range_ie_u64::length() {
return wuffs_base__range_ie_u64__length(this);
}
#endif // __cplusplus
// --------
// wuffs_base__rect_ii_u32 is a rectangle (a 2-dimensional range) on the
// integer grid. The "ii" means that the bounds are inclusive on the low end
// and inclusive on the high end. It contains all points (x, y) such that
// ((min_incl_x <= x) && (x <= max_incl_x)) and likewise for y.
//
// It is valid for min > max, in which case the rectangle is empty. There are
// multiple representations of an empty rectangle.
//
// The X and Y axes increase right and down.
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();
inline bool equals(wuffs_base__rect_ii_u32__struct s);
inline bool contains(uint32_t x, uint32_t y);
inline wuffs_base__rect_ii_u32__struct intersect(
wuffs_base__rect_ii_u32__struct s);
inline wuffs_base__rect_ii_u32__struct unite(
wuffs_base__rect_ii_u32__struct s);
#endif // __cplusplus
} wuffs_base__rect_ii_u32;
static inline bool //
wuffs_base__rect_ii_u32__is_empty(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(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 bool //
wuffs_base__rect_ii_u32__contains(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 wuffs_base__rect_ii_u32 //
wuffs_base__rect_ii_u32__intersect(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(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;
}
#ifdef __cplusplus
inline bool //
wuffs_base__rect_ii_u32::is_empty() {
return wuffs_base__rect_ii_u32__is_empty(this);
}
inline bool //
wuffs_base__rect_ii_u32::equals(wuffs_base__rect_ii_u32 s) {
return wuffs_base__rect_ii_u32__equals(this, s);
}
inline bool //
wuffs_base__rect_ii_u32::contains(uint32_t x, uint32_t y) {
return wuffs_base__rect_ii_u32__contains(this, x, y);
}
inline wuffs_base__rect_ii_u32 //
wuffs_base__rect_ii_u32::intersect(wuffs_base__rect_ii_u32 s) {
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) {
return wuffs_base__rect_ii_u32__unite(this, s);
}
#endif // __cplusplus
// --------
// wuffs_base__rect_ie_u32 is a rectangle (a 2-dimensional range) on the
// integer grid. The "ie" means that the bounds are inclusive on the low end
// and exclusive on the high end. It contains all points (x, y) such that
// ((min_incl_x <= x) && (x < max_excl_x)) and likewise for y.
//
// It is valid for min >= max, in which case the rectangle is empty. There are
// multiple representations of an empty rectangle, including a value with all
// fields zero.
//
// The X and Y axes increase right and down.
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();
inline bool equals(wuffs_base__rect_ie_u32__struct s);
inline bool contains(uint32_t x, uint32_t y);
inline wuffs_base__rect_ie_u32__struct intersect(
wuffs_base__rect_ie_u32__struct s);
inline wuffs_base__rect_ie_u32__struct unite(
wuffs_base__rect_ie_u32__struct s);
inline uint32_t width();
inline uint32_t height();
#endif // __cplusplus
} wuffs_base__rect_ie_u32;
static inline bool //
wuffs_base__rect_ie_u32__is_empty(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(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 bool //
wuffs_base__rect_ie_u32__contains(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 wuffs_base__rect_ie_u32 //
wuffs_base__rect_ie_u32__intersect(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(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 uint32_t //
wuffs_base__rect_ie_u32__width(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(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() {
return wuffs_base__rect_ie_u32__is_empty(this);
}
inline bool //
wuffs_base__rect_ie_u32::equals(wuffs_base__rect_ie_u32 s) {
return wuffs_base__rect_ie_u32__equals(this, s);
}
inline bool //
wuffs_base__rect_ie_u32::contains(uint32_t x, uint32_t y) {
return wuffs_base__rect_ie_u32__contains(this, x, y);
}
inline wuffs_base__rect_ie_u32 //
wuffs_base__rect_ie_u32::intersect(wuffs_base__rect_ie_u32 s) {
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) {
return wuffs_base__rect_ie_u32__unite(this, s);
}
inline uint32_t //
wuffs_base__rect_ie_u32::width() {
return wuffs_base__rect_ie_u32__width(this);
}
inline uint32_t //
wuffs_base__rect_ie_u32::height() {
return wuffs_base__rect_ie_u32__height(this);
}
#endif // __cplusplus
// ---------------- I/O
struct wuffs_base__io_buffer__struct;
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 {
struct wuffs_base__io_buffer__struct* buf;
// The bounds values are typically NULL, when created by the Wuffs public
// API. NULL means that the callee substitutes the implicit bounds derived
// from buf.
uint8_t* mark;
uint8_t* limit;
} private_impl;
} wuffs_base__io_reader;
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 {
struct wuffs_base__io_buffer__struct* buf;
// The bounds values are typically NULL, when created by the Wuffs public
// API. NULL means that the callee substitutes the implicit bounds derived
// from buf.
uint8_t* mark;
uint8_t* limit;
} private_impl;
} wuffs_base__io_writer;
// 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__io_buffer__struct {
wuffs_base__slice_u8 data;
wuffs_base__io_buffer_meta meta;
#ifdef __cplusplus
inline void compact();
inline wuffs_base__io_reader reader();
inline wuffs_base__io_writer writer();
inline uint64_t reader_io_position();
inline uint64_t writer_io_position();
#endif // __cplusplus
} wuffs_base__io_buffer;
// 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 wuffs_base__io_reader //
wuffs_base__io_buffer__reader(wuffs_base__io_buffer* buf) {
wuffs_base__io_reader ret = ((wuffs_base__io_reader){});
ret.private_impl.buf = buf;
return ret;
}
static inline wuffs_base__io_writer //
wuffs_base__io_buffer__writer(wuffs_base__io_buffer* buf) {
wuffs_base__io_writer ret = ((wuffs_base__io_writer){});
ret.private_impl.buf = buf;
return ret;
}
static inline uint64_t //
wuffs_base__io_buffer__reader_io_position(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_io_position(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__struct::compact() {
wuffs_base__io_buffer__compact(this);
}
inline wuffs_base__io_reader //
wuffs_base__io_buffer__struct::reader() {
return wuffs_base__io_buffer__reader(this);
}
inline wuffs_base__io_writer //
wuffs_base__io_buffer__struct::writer() {
return wuffs_base__io_buffer__writer(this);
}
inline uint64_t //
wuffs_base__io_buffer__struct::reader_io_position() {
return wuffs_base__io_buffer__reader_io_position(this);
}
inline uint64_t //
wuffs_base__io_buffer__struct::writer_io_position() {
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__slice_u8){
.ptr = (uint8_t*)(p),
.len = num_u8,
});
}
}
return ((wuffs_base__slice_u8){});
}
static inline wuffs_base__slice_u16 //
wuffs_base__malloc_slice_u16(void* (*malloc_func)(size_t), uint64_t num_u16) {
if (malloc_func && (num_u16 <= (SIZE_MAX / sizeof(uint16_t)))) {
void* p = (*malloc_func)(num_u16 * sizeof(uint16_t));
if (p) {
return ((wuffs_base__slice_u16){
.ptr = (uint16_t*)(p),
.len = num_u16,
});
}
}
return ((wuffs_base__slice_u16){});
}
static inline wuffs_base__slice_u32 //
wuffs_base__malloc_slice_u32(void* (*malloc_func)(size_t), uint64_t num_u32) {
if (malloc_func && (num_u32 <= (SIZE_MAX / sizeof(uint32_t)))) {
void* p = (*malloc_func)(num_u32 * sizeof(uint32_t));
if (p) {
return ((wuffs_base__slice_u32){
.ptr = (uint32_t*)(p),
.len = num_u32,
});
}
}
return ((wuffs_base__slice_u32){});
}
static inline wuffs_base__slice_u64 //
wuffs_base__malloc_slice_u64(void* (*malloc_func)(size_t), uint64_t num_u64) {
if (malloc_func && (num_u64 <= (SIZE_MAX / sizeof(uint64_t)))) {
void* p = (*malloc_func)(num_u64 * sizeof(uint64_t));
if (p) {
return ((wuffs_base__slice_u64){
.ptr = (uint64_t*)(p),
.len = num_u64,
});
}
}
return ((wuffs_base__slice_u64){});
}
// ---------------- 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. Its bits:
// - bit 31 is reserved.
// - bits 30 .. 28 encodes color (and channel order, in terms of memory).
// - bit 27 is reserved.
// - bits 26 .. 24 encodes transparency.
// - bits 23 .. 21 are reserved.
// - bit 20 indicates big-endian/MSB-first (as opposed to little/LSB).
// - bit 19 indicates floating point (as opposed to integer).
// - bit 18 indicates palette-indexed. The number-of-planes (the next
// field) will be zero, as the format is considered packed,
// but the 8-bit N-BGRA color data is stored in plane 3.
// - bits 17 .. 16 are the number of planes, minus 1. Zero means packed.
// - bits 15 .. 12 encodes the number of bits (depth) in the 3rd channel.
// - bits 11 .. 8 encodes the number of bits (depth) in the 2nd channel.
// - bits 7 .. 4 encodes the number of bits (depth) in the 1st channel.
// - bits 3 .. 0 encodes the number of bits (depth) in the 0th channel.
//
// The bit fields of a wuffs_base__pixel_format are not independent. For
// example, the number of planes should not be greater than the number of
// channels. Similarly, bits 15..4 are unused (and should be zero) if bits
// 31..24 (color and transparency) together imply only 1 channel (gray, no
// alpha) and floating point samples should mean a bit depth of 16, 32 or 64.
//
// Formats hold between 1 and 4 channels. For example: Y (1 channel: gray), YA
// (2 channels: gray and alpha), BGR (3 channels: blue, green, red) or CMYK (4
// channels: cyan, magenta, yellow, black).
//
// For direct formats with N > 1 channels, those channels can be laid out in
// either 1 (packed) or N (planar) planes. For example, RGBA data is usually
// packed, but YCbCr data is usually planar, due to chroma subsampling (for
// details, see the wuffs_base__pixel_subsampling type).
//
// For indexed formats, the palette (always 256 × 4 bytes) holds 8 bits per
// channel non-alpha-premultiplied BGRA color data. There is only 1 plane (for
// the index), as the format is considered packed. Plane 0 holds the per-pixel
// indices. Plane 3 is re-purposed to hold the per-index colors.
//
// The color field is encoded in 3 bits:
// - 0 means A (Alpha).
// - 1 means Y or YA (Gray, Alpha).
// - 2 means YCbCr or YCbCrA (Luma, Chroma-blue, Chroma-red, Alpha).
// - 3 means YCoCg or YCoCgA (Luma, Chroma-orange, Chroma-green, Alpha).
// - 4 means BGR, BGRX or BGRA (Blue, Green, Red, X-padding or Alpha).
// - 5 means RGB, RGBX or RGBA (Red, Green, Blue, X-padding or Alpha).
// - 6 means CMY or CMYK (Cyan, Magenta, Yellow, Black).
// - all other values are reserved.
//
// In Wuffs, channels are given in memory order (also known as byte order),
// regardless of endianness, since the C type for the pixel data is an array of
// bytes, not an array of uint32_t. For example, packed BGRA with 8 bits per
// channel means that the bytes in memory are always Blue, Green, Red then
// Alpha. On big-endian systems, that is the uint32_t 0xBBGGRRAA. On
// little-endian, 0xAARRGGBB.
//
// When the color field (3 bits) encodes multiple options, the transparency
// field (3 bits) distinguishes them:
// - 0 means fully opaque, no extra channels
// - 1 means fully opaque, one extra channel (X or K, padding or black).
// - 5 means one extra alpha channel, other channels are non-premultiplied.
// - 6 means one extra alpha channel, other channels are premultiplied.
// - 7 means one extra alpha channel, binary alpha.
// - all other values are reserved.
//
// Binary alpha means that if a color is not completely opaque, it is
// completely transparent black. As a source pixel format, it can therefore be
// treated as either non-premultiplied or premultiplied.
//
// The zero wuffs_base__pixel_format value is an invalid pixel format, as it is
// invalid to combine the zero color (alpha only) with the zero transparency.
//
// Bit depth is encoded in 4 bits:
// - 0 means the channel or index is unused.
// - x means a bit depth of x, for x in the range 1..8.
// - 9 means a bit depth of 10.
// - 10 means a bit depth of 12.
// - 11 means a bit depth of 16.
// - 12 means a bit depth of 24.
// - 13 means a bit depth of 32.
// - 14 means a bit depth of 48.
// - 15 means a bit depth of 64.
//
// For example, wuffs_base__pixel_format 0x5510BBBB is a natural format for
// decoding a PNG image - network byte order (also known as big-endian),
// packed, non-premultiplied alpha - that happens to be 16-bit-depth truecolor
// with alpha (RGBA). In memory order:
//
// ptr+0 ptr+1 ptr+2 ptr+3 ptr+4 ptr+5 ptr+6 ptr+7
// Rhi Rlo Ghi Glo Bhi Blo Ahi Alo
//
// For example, the value wuffs_base__pixel_format 0x40000565 means BGR with no
// alpha or padding, 5/6/5 bits for blue/green/red, packed 2 bytes per pixel,
// laid out LSB-first in memory order:
//
// ptr+0........... ptr+1...........
// MSB LSB MSB LSB
// G₂G₁G₀B₄B₃B₂B₁B₀ R₄R₃R₂R₁R₀G₅G₄G₃
//
// On little-endian systems (but not big-endian), this Wuffs pixel format value
// (0x40000565) corresponds to the Cairo library's CAIRO_FORMAT_RGB16_565, the
// SDL2 (Simple DirectMedia Layer 2) library's SDL_PIXELFORMAT_RGB565 and the
// Skia library's kRGB_565_SkColorType. Note BGR in Wuffs versus RGB in the
// other libraries.
//
// Regardless of endianness, this Wuffs pixel format value (0x40000565)
// corresponds to the V4L2 (Video For Linux 2) library's V4L2_PIX_FMT_RGB565
// and the Wayland-DRM library's WL_DRM_FORMAT_RGB565.
//
// Different software libraries name their pixel formats (and especially their
// channel order) either according to memory layout or as bits of a native
// integer type like uint32_t. The two conventions differ because of a system's
// endianness. As mentioned earlier, Wuffs pixel formats are always in memory
// order. More detail of other software libraries' naming conventions is in the
// Pixel Format Guide at https://afrantzis.github.io/pixel-format-guide/
//
// Do not manipulate these 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, for packed pixel formats,
// the number of bits per pixel. It 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_packed(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 the mapping of pixel space coordinates
// (x, y) to pixel buffer indices (i, j). That mapping can differ for each
// plane p. For a depth of 8 bits (1 byte), the p'th plane's sample starts at
// (planes[p].ptr + (j * planes[p].stride) + i).
//
// For packed pixel formats, the mapping is trivial: i = x and j = y. For
// planar pixel formats, the mapping can differ due to chroma subsampling. For
// example, consider a three plane YCbCr pixel format with 4:2:2 subsampling.
// For the luma (Y) channel, there is one sample for every pixel, but for the
// chroma (Cb, Cr) channels, there is one sample for every two pixels: pairs of
// horizontally adjacent pixels form one macropixel, i = x / 2 and j == y. In
// general, for a given p:
// - i = (x + bias_x) >> shift_x.
// - j = (y + bias_y) >> shift_y.
// where biases and shifts are in the range 0..3 and 0..2 respectively.
//
// In general, the biases will be zero after decoding an image. However, making
// a sub-image may change the bias, since the (x, y) coordinates are relative
// to the sub-image's top-left origin, but the backing pixel buffers were
// created relative to the original image's origin.
//
// For each plane p, each of those four numbers (biases and shifts) are encoded
// in two bits, which combine to form an 8 bit unsigned integer:
//
// e_p = (bias_x << 6) | (shift_x << 4) | (bias_y << 2) | (shift_y << 0)
//
// Those e_p values (e_0 for the first plane, e_1 for the second plane, etc)
// combine to form a wuffs_base__pixel_subsampling value:
//
// pixsub = (e_3 << 24) | (e_2 << 16) | (e_1 << 8) | (e_0 << 0)
//
// Do not manipulate these 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)0x202000)
#define WUFFS_BASE__PIXEL_SUBSAMPLING__410 \
((wuffs_base__pixel_subsampling)0x212100)
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__shift_x(wuffs_base__pixel_subsampling s,
uint32_t plane) {
uint32_t shift = ((plane & 0x03) * 8) + 4;
return (s >> shift) & 0x03;
}
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__shift_y(wuffs_base__pixel_subsampling s,
uint32_t plane) {
uint32_t shift = ((plane & 0x03) * 8) + 0;
return (s >> shift) & 0x03;
}
// --------
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();
inline wuffs_base__pixel_format pixel_format();
inline wuffs_base__pixel_subsampling pixel_subsampling();
inline wuffs_base__rect_ie_u32 bounds();
inline uint32_t width();
inline uint32_t height();
inline uint64_t pixbuf_len();
#endif // __cplusplus
} wuffs_base__pixel_config;
// 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 = ((wuffs_base__pixel_config){});
}
static inline void //
wuffs_base__pixel_config__invalidate(wuffs_base__pixel_config* c) {
if (c) {
*c = ((wuffs_base__pixel_config){});
}
}
static inline bool //
wuffs_base__pixel_config__is_valid(wuffs_base__pixel_config* c) {
return c && c->private_impl.pixfmt;
}
static inline wuffs_base__pixel_format //
wuffs_base__pixel_config__pixel_format(wuffs_base__pixel_config* c) {
return c ? c->private_impl.pixfmt : 0;
}
static inline wuffs_base__pixel_subsampling //
wuffs_base__pixel_config__pixel_subsampling(wuffs_base__pixel_config* c) {
return c ? c->private_impl.pixsub : 0;
}
static inline wuffs_base__rect_ie_u32 //
wuffs_base__pixel_config__bounds(wuffs_base__pixel_config* c) {
return c ? ((wuffs_base__rect_ie_u32){
.min_incl_x = 0,
.min_incl_y = 0,
.max_excl_x = c->private_impl.width,
.max_excl_y = c->private_impl.height,
})
: ((wuffs_base__rect_ie_u32){});
}
static inline uint32_t //
wuffs_base__pixel_config__width(wuffs_base__pixel_config* c) {
return c ? c->private_impl.width : 0;
}
static inline uint32_t //
wuffs_base__pixel_config__height(wuffs_base__pixel_config* c) {
return c ? c->private_impl.height : 0;
}
// TODO: this is the right API for planar (not packed) 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(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() {
return wuffs_base__pixel_config__is_valid(this);
}
inline wuffs_base__pixel_format //
wuffs_base__pixel_config::pixel_format() {
return wuffs_base__pixel_config__pixel_format(this);
}
inline wuffs_base__pixel_subsampling //
wuffs_base__pixel_config::pixel_subsampling() {
return wuffs_base__pixel_config__pixel_subsampling(this);
}
inline wuffs_base__rect_ie_u32 //
wuffs_base__pixel_config::bounds() {
return wuffs_base__pixel_config__bounds(this);
}
inline uint32_t //
wuffs_base__pixel_config::width() {
return wuffs_base__pixel_config__width(this);
}
inline uint32_t //
wuffs_base__pixel_config::height() {
return wuffs_base__pixel_config__height(this);
}
inline uint64_t //
wuffs_base__pixel_config::pixbuf_len() {
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();
inline uint64_t first_frame_io_position();
inline bool first_frame_is_opaque();
#endif // __cplusplus
} wuffs_base__image_config;
// 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 = ((wuffs_base__image_config){});
}
static inline void //
wuffs_base__image_config__invalidate(wuffs_base__image_config* c) {
if (c) {
*c = ((wuffs_base__image_config){});
}
}
static inline bool //
wuffs_base__image_config__is_valid(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(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(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() {
return wuffs_base__image_config__is_valid(this);
}
inline uint64_t //
wuffs_base__image_config::first_frame_io_position() {
return wuffs_base__image_config__first_frame_io_position(this);
}
inline bool //
wuffs_base__image_config::first_frame_is_opaque() {
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;
} 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);
inline wuffs_base__rect_ie_u32 bounds();
inline uint32_t width();
inline uint32_t height();
inline wuffs_base__flicks duration();
inline uint64_t index();
inline uint64_t io_position();
inline wuffs_base__animation_blend blend();
inline wuffs_base__animation_disposal disposal();
#endif // __cplusplus
} wuffs_base__frame_config;
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) {
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;
}
static inline wuffs_base__rect_ie_u32 //
wuffs_base__frame_config__bounds(wuffs_base__frame_config* c) {
return c ? c->private_impl.bounds : ((wuffs_base__rect_ie_u32){});
}
static inline uint32_t //
wuffs_base__frame_config__width(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(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(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(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(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(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(wuffs_base__frame_config* c) {
return c ? c->private_impl.disposal : 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__frame_config__update(this, bounds, duration, index, io_position,
blend, disposal);
}
inline wuffs_base__rect_ie_u32 //
wuffs_base__frame_config::bounds() {
return wuffs_base__frame_config__bounds(this);
}
inline uint32_t //
wuffs_base__frame_config::width() {
return wuffs_base__frame_config__width(this);
}
inline uint32_t //
wuffs_base__frame_config::height() {
return wuffs_base__frame_config__height(this);
}
inline wuffs_base__flicks //
wuffs_base__frame_config::duration() {
return wuffs_base__frame_config__duration(this);
}
inline uint64_t //
wuffs_base__frame_config::index() {
return wuffs_base__frame_config__index(this);
}
inline uint64_t //
wuffs_base__frame_config::io_position() {
return wuffs_base__frame_config__io_position(this);
}
inline wuffs_base__animation_blend //
wuffs_base__frame_config::blend() {
return wuffs_base__frame_config__blend(this);
}
inline wuffs_base__animation_disposal //
wuffs_base__frame_config::disposal() {
return wuffs_base__frame_config__disposal(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(wuffs_base__pixel_config* pixcfg,
wuffs_base__slice_u8 pixbuf_memory);
inline wuffs_base__slice_u8 palette();
inline wuffs_base__pixel_format pixel_format();
inline wuffs_base__table_u8 plane(uint32_t p);
#endif // __cplusplus
} wuffs_base__pixel_buffer;
static inline wuffs_base__status //
wuffs_base__pixel_buffer__set_from_slice(wuffs_base__pixel_buffer* b,
wuffs_base__pixel_config* pixcfg,
wuffs_base__slice_u8 pixbuf_memory) {
if (!b) {
return wuffs_base__error__bad_receiver;
}
*b = ((wuffs_base__pixel_buffer){});
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__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)) {
return wuffs_base__error__bad_argument;
}
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;
}
// 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__slice_u8){
.ptr = tab->ptr,
.len = 1024,
});
}
}
return ((wuffs_base__slice_u8){});
}
static inline wuffs_base__pixel_format //
wuffs_base__pixel_buffer__pixel_format(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) {
return (b && (p < WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX))
? b->private_impl.planes[p]
: ((wuffs_base__table_u8){});
}
#ifdef __cplusplus
inline wuffs_base__status //
wuffs_base__pixel_buffer::set_from_slice(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__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() {
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 void 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_packed(wuffs_base__slice_u8 dst,
wuffs_base__slice_u8 dst_palette,
wuffs_base__slice_u8 src);
#endif // __cplusplus
} wuffs_base__pixel_swizzler;
// TODO: should prepare (both the C and C++ methods) return a status?
void //
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_packed(wuffs_base__pixel_swizzler* p,
wuffs_base__slice_u8 dst,
wuffs_base__slice_u8 dst_palette,
wuffs_base__slice_u8 src);
#ifdef __cplusplus
inline void //
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) {
wuffs_base__pixel_swizzler__prepare(this, dst_format, dst_palette, src_format,
src_palette);
}
uint64_t //
wuffs_base__pixel_swizzler::swizzle_packed(wuffs_base__slice_u8 dst,
wuffs_base__slice_u8 dst_palette,
wuffs_base__slice_u8 src) {
return wuffs_base__pixel_swizzler__swizzle_packed(this, dst, dst_palette,
src);
}
#endif // __cplusplus
#ifdef __cplusplus
} // extern "C"
#endif
#ifdef __cplusplus
extern "C" {
#endif
// ---------------- Status Codes
// ---------------- Public Consts
// ---------------- Struct Declarations
typedef struct wuffs_adler32__hasher__struct wuffs_adler32__hasher;
// ---------------- Public Initializer Prototypes
// wuffs_adler32__hasher__check_wuffs_version is an initializer function.
//
// It should be called before any other wuffs_adler32__hasher__* function.
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_adler32__hasher__check_wuffs_version(wuffs_adler32__hasher* self,
size_t sizeof_star_self,
uint64_t wuffs_version);
size_t //
sizeof__wuffs_adler32__hasher();
// ---------------- Public Function Prototypes
WUFFS_BASE__MAYBE_STATIC uint32_t //
wuffs_adler32__hasher__update(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 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;
public:
#endif // WUFFS_IMPLEMENTATION
#ifdef __cplusplus
inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
check_wuffs_version(size_t sizeof_star_self, uint64_t wuffs_version) {
return wuffs_adler32__hasher__check_wuffs_version(this, sizeof_star_self,
wuffs_version);
}
inline uint32_t //
update(wuffs_base__slice_u8 a_x) {
return wuffs_adler32__hasher__update(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
// wuffs_crc32__ieee_hasher__check_wuffs_version is an initializer function.
//
// It should be called before any other wuffs_crc32__ieee_hasher__* function.
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_crc32__ieee_hasher__check_wuffs_version(wuffs_crc32__ieee_hasher* self,
size_t sizeof_star_self,
uint64_t wuffs_version);
size_t //
sizeof__wuffs_crc32__ieee_hasher();
// ---------------- Public Function Prototypes
WUFFS_BASE__MAYBE_STATIC uint32_t //
wuffs_crc32__ieee_hasher__update(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 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;
public:
#endif // WUFFS_IMPLEMENTATION
#ifdef __cplusplus
inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
check_wuffs_version(size_t sizeof_star_self, uint64_t wuffs_version) {
return wuffs_crc32__ieee_hasher__check_wuffs_version(this, sizeof_star_self,
wuffs_version);
}
inline uint32_t //
update(wuffs_base__slice_u8 a_x) {
return wuffs_crc32__ieee_hasher__update(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
// ---------------- Struct Declarations
typedef struct wuffs_deflate__decoder__struct wuffs_deflate__decoder;
// ---------------- Public Initializer Prototypes
// wuffs_deflate__decoder__check_wuffs_version is an initializer function.
//
// It should be called before any other wuffs_deflate__decoder__* function.
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_deflate__decoder__check_wuffs_version(wuffs_deflate__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version);
size_t //
sizeof__wuffs_deflate__decoder();
// ---------------- Public Function Prototypes
WUFFS_BASE__MAYBE_STATIC wuffs_base__status //
wuffs_deflate__decoder__decode_io_writer(wuffs_deflate__decoder* self,
wuffs_base__io_writer a_dst,
wuffs_base__io_reader a_src);
// ---------------- 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 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_huffs[2][1234];
uint32_t f_n_huffs_bits[2];
uint8_t f_history[32768];
uint32_t f_history_index;
uint8_t f_code_lengths[320];
bool f_end_of_block;
struct {
uint32_t coro_susp_point;
} c_decode_io_writer[1];
struct {
uint32_t coro_susp_point;
uint32_t v_final;
} c_decode_blocks[1];
struct {
uint32_t coro_susp_point;
uint32_t v_length;
uint64_t scratch;
} c_decode_uncompressed[1];
struct {
uint32_t coro_susp_point;
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;
} c_init_dynamic_huffman[1];
struct {
uint32_t coro_susp_point;
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;
} c_decode_huffman_slow[1];
} 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;
public:
#endif // WUFFS_IMPLEMENTATION
#ifdef __cplusplus
inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
check_wuffs_version(size_t sizeof_star_self, uint64_t wuffs_version) {
return wuffs_deflate__decoder__check_wuffs_version(this, sizeof_star_self,
wuffs_version);
}
inline wuffs_base__status //
decode_io_writer(wuffs_base__io_writer a_dst, wuffs_base__io_reader a_src) {
return wuffs_deflate__decoder__decode_io_writer(this, a_dst, a_src);
}
#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
// ---------------- Struct Declarations
typedef struct wuffs_lzw__decoder__struct wuffs_lzw__decoder;
// ---------------- Public Initializer Prototypes
// wuffs_lzw__decoder__check_wuffs_version is an initializer function.
//
// It should be called before any other wuffs_lzw__decoder__* function.
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_lzw__decoder__check_wuffs_version(wuffs_lzw__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version);
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__status //
wuffs_lzw__decoder__decode_io_writer(wuffs_lzw__decoder* self,
wuffs_base__io_writer a_dst,
wuffs_base__io_reader a_src);
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 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_lw;
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;
uint8_t f_suffixes[4096][8];
uint16_t f_prefixes[4096];
uint16_t f_lm1s[4096];
uint8_t f_output[8199];
struct {
uint32_t coro_susp_point;
} c_decode_io_writer[1];
struct {
uint32_t coro_susp_point;
} c_write_to[1];
} 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;
public:
#endif // WUFFS_IMPLEMENTATION
#ifdef __cplusplus
inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
check_wuffs_version(size_t sizeof_star_self, uint64_t wuffs_version) {
return wuffs_lzw__decoder__check_wuffs_version(this, sizeof_star_self,
wuffs_version);
}
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__status //
decode_io_writer(wuffs_base__io_writer a_dst, wuffs_base__io_reader a_src) {
return wuffs_lzw__decoder__decode_io_writer(this, a_dst, a_src);
}
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_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__not_enough_pixel_data;
extern const char* wuffs_gif__error__too_much_pixel_data;
// ---------------- Public Consts
// ---------------- Struct Declarations
typedef struct wuffs_gif__decoder__struct wuffs_gif__decoder;
// ---------------- Public Initializer Prototypes
// wuffs_gif__decoder__check_wuffs_version is an initializer function.
//
// It should be called before any other wuffs_gif__decoder__* function.
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_gif__decoder__check_wuffs_version(wuffs_gif__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version);
size_t //
sizeof__wuffs_gif__decoder();
// ---------------- Public Function Prototypes
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_reader a_src);
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_reader 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_reader 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 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_end_of_data;
bool f_restarted;
bool f_previous_lzw_decode_ended_abruptly;
uint8_t f_which_palette;
uint8_t f_interlace;
bool f_seen_num_loops;
uint32_t f_num_loops;
bool f_seen_graphic_control;
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;
wuffs_base__range_ie_u32 f_dirty_y;
uint64_t f_compressed_ri;
uint64_t f_compressed_wi;
uint8_t f_compressed[4096];
uint8_t f_palettes[2][1024];
uint8_t f_dst_palette[1024];
wuffs_base__pixel_swizzler f_swizzler;
wuffs_base__utility f_util;
wuffs_lzw__decoder f_lzw;
struct {
uint32_t coro_susp_point;
} c_decode_image_config[1];
struct {
uint32_t coro_susp_point;
} c_decode_frame_config[1];
struct {
uint32_t coro_susp_point;
uint64_t scratch;
} c_skip_frame[1];
struct {
uint32_t coro_susp_point;
} c_decode_frame[1];
struct {
uint32_t coro_susp_point;
} c_decode_up_to_id_part1[1];
struct {
uint32_t coro_susp_point;
uint8_t v_c[6];
uint32_t v_i;
} c_decode_header[1];
struct {
uint32_t coro_susp_point;
uint8_t v_flags;
uint32_t v_num_palette_entries;
uint32_t v_i;
uint64_t scratch;
} c_decode_lsd[1];
struct {
uint32_t coro_susp_point;
} c_decode_extension[1];
struct {
uint32_t coro_susp_point;
uint64_t scratch;
} c_skip_blocks[1];
struct {
uint32_t coro_susp_point;
uint8_t v_block_size;
bool v_not_animexts;
bool v_not_netscape;
uint64_t scratch;
} c_decode_ae[1];
struct {
uint32_t coro_susp_point;
uint64_t scratch;
} c_decode_gc[1];
struct {
uint32_t coro_susp_point;
uint64_t scratch;
} c_decode_id_part0[1];
struct {
uint32_t coro_susp_point;
uint32_t v_num_palette_entries;
uint32_t v_i;
uint64_t scratch;
} c_decode_id_part1[1];
struct {
uint32_t coro_susp_point;
uint64_t v_block_size;
bool v_need_block_size;
wuffs_base__status v_lzw_status;
uint64_t scratch;
} c_decode_id_part2[1];
} 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;
public:
#endif // WUFFS_IMPLEMENTATION
#ifdef __cplusplus
inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
check_wuffs_version(size_t sizeof_star_self, uint64_t wuffs_version) {
return wuffs_gif__decoder__check_wuffs_version(this, sizeof_star_self,
wuffs_version);
}
inline wuffs_base__status //
decode_image_config(wuffs_base__image_config* a_dst,
wuffs_base__io_reader a_src) {
return wuffs_gif__decoder__decode_image_config(this, a_dst, a_src);
}
inline uint32_t //
num_animation_loops() const {
return wuffs_gif__decoder__num_animation_loops(this);
}
inline uint64_t //
num_decoded_frame_configs() const {
return wuffs_gif__decoder__num_decoded_frame_configs(this);
}
inline uint64_t //
num_decoded_frames() const {
return wuffs_gif__decoder__num_decoded_frames(this);
}
inline wuffs_base__rect_ie_u32 //
frame_dirty_rect() const {
return wuffs_gif__decoder__frame_dirty_rect(this);
}
inline wuffs_base__range_ii_u64 //
workbuf_len() const {
return wuffs_gif__decoder__workbuf_len(this);
}
inline wuffs_base__status //
restart_frame(uint64_t a_index, uint64_t a_io_position) {
return wuffs_gif__decoder__restart_frame(this, a_index, a_io_position);
}
inline wuffs_base__status //
decode_frame_config(wuffs_base__frame_config* a_dst,
wuffs_base__io_reader 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_reader 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
// ---------------- Struct Declarations
typedef struct wuffs_gzip__decoder__struct wuffs_gzip__decoder;
// ---------------- Public Initializer Prototypes
// wuffs_gzip__decoder__check_wuffs_version is an initializer function.
//
// It should be called before any other wuffs_gzip__decoder__* function.
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_gzip__decoder__check_wuffs_version(wuffs_gzip__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version);
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__status //
wuffs_gzip__decoder__decode_io_writer(wuffs_gzip__decoder* self,
wuffs_base__io_writer a_dst,
wuffs_base__io_reader a_src);
// ---------------- 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 fields directly. There is no API/ABI
// compatibility or safety guarantee if you do so. Instead, use the
// wuffs_foo__bar__baz functions.
//
// It is a struct, not a struct*, so that the outermost wuffs_foo__bar
// struct can be stack allocated when WUFFS_IMPLEMENTATION is defined.
struct {
uint32_t magic;
uint32_t active_coroutine;
wuffs_deflate__decoder f_flate;
wuffs_crc32__ieee_hasher f_checksum;
bool f_ignore_checksum;
struct {
uint32_t coro_susp_point;
uint8_t v_flags;
uint32_t v_checksum_got;
uint32_t v_decoded_length_got;
uint32_t v_checksum_want;
uint64_t scratch;
} c_decode_io_writer[1];
} 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;
public:
#endif // WUFFS_IMPLEMENTATION
#ifdef __cplusplus
inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
check_wuffs_version(size_t sizeof_star_self, uint64_t wuffs_version) {
return wuffs_gzip__decoder__check_wuffs_version(this, sizeof_star_self,
wuffs_version);
}
inline wuffs_base__empty_struct //
set_ignore_checksum(bool a_ic) {
return wuffs_gzip__decoder__set_ignore_checksum(this, a_ic);
}
inline wuffs_base__status //
decode_io_writer(wuffs_base__io_writer a_dst, wuffs_base__io_reader a_src) {
return wuffs_gzip__decoder__decode_io_writer(this, a_dst, a_src);
}
#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__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;
// ---------------- Public Consts
// ---------------- Struct Declarations
typedef struct wuffs_zlib__decoder__struct wuffs_zlib__decoder;
// ---------------- Public Initializer Prototypes
// wuffs_zlib__decoder__check_wuffs_version is an initializer function.
//
// It should be called before any other wuffs_zlib__decoder__* function.
//
// Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version.
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_zlib__decoder__check_wuffs_version(wuffs_zlib__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version);
size_t //
sizeof__wuffs_zlib__decoder();
// ---------------- Public Function Prototypes
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__status //
wuffs_zlib__decoder__decode_io_writer(wuffs_zlib__decoder* self,
wuffs_base__io_writer a_dst,
wuffs_base__io_reader a_src);
// ---------------- 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 fields directly. There is no API/ABI
// compatibility or safety guarantee if you do so. Instead, use the
// wuffs_foo__bar__baz functions.
//
// It is a struct, not a struct*, so that the outermost wuffs_foo__bar
// struct can be stack allocated when WUFFS_IMPLEMENTATION is defined.
struct {
uint32_t magic;
uint32_t active_coroutine;
wuffs_deflate__decoder f_flate;
wuffs_adler32__hasher f_checksum;
bool f_ignore_checksum;
struct {
uint32_t coro_susp_point;
uint32_t v_checksum_got;
uint64_t scratch;
} c_decode_io_writer[1];
} 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;
public:
#endif // WUFFS_IMPLEMENTATION
#ifdef __cplusplus
inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
check_wuffs_version(size_t sizeof_star_self, uint64_t wuffs_version) {
return wuffs_zlib__decoder__check_wuffs_version(this, sizeof_star_self,
wuffs_version);
}
inline wuffs_base__empty_struct //
set_ignore_checksum(bool a_ic) {
return wuffs_zlib__decoder__set_ignore_checksum(this, a_ic);
}
inline wuffs_base__status //
decode_io_writer(wuffs_base__io_writer a_dst, wuffs_base__io_reader a_src) {
return wuffs_zlib__decoder__decode_io_writer(this, a_dst, a_src);
}
#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
#ifdef __cplusplus
extern "C" {
#endif
#define WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(x) (void)(x)
static inline void wuffs_base__ignore_check_wuffs_version_status(
wuffs_base__status z) {}
// 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__) && __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.
static inline wuffs_base__empty_struct //
wuffs_base__return_empty_struct() {
return ((wuffs_base__empty_struct){});
}
// ---------------- 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)(p[0]) << 8) | ((uint16_t)(p[1]) << 0);
}
static inline uint16_t //
wuffs_base__load_u16le(uint8_t* p) {
return ((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] = x >> 8;
p[1] = x >> 0;
}
static inline void //
wuffs_base__store_u16le(uint8_t* p, uint16_t x) {
p[0] = x >> 0;
p[1] = x >> 8;
}
static inline void //
wuffs_base__store_u24be(uint8_t* p, uint32_t x) {
p[0] = x >> 16;
p[1] = x >> 8;
p[2] = x >> 0;
}
static inline void //
wuffs_base__store_u24le(uint8_t* p, uint32_t x) {
p[0] = x >> 0;
p[1] = x >> 8;
p[2] = x >> 16;
}
static inline void //
wuffs_base__store_u32be(uint8_t* p, uint32_t x) {
p[0] = x >> 24;
p[1] = x >> 16;
p[2] = x >> 8;
p[3] = x >> 0;
}
static inline void //
wuffs_base__store_u32le(uint8_t* p, uint32_t x) {
p[0] = x >> 0;
p[1] = x >> 8;
p[2] = x >> 16;
p[3] = x >> 24;
}
static inline void //
wuffs_base__store_u40be(uint8_t* p, uint64_t x) {
p[0] = x >> 32;
p[1] = x >> 24;
p[2] = x >> 16;
p[3] = x >> 8;
p[4] = x >> 0;
}
static inline void //
wuffs_base__store_u40le(uint8_t* p, uint64_t x) {
p[0] = x >> 0;
p[1] = x >> 8;
p[2] = x >> 16;
p[3] = x >> 24;
p[4] = x >> 32;
}
static inline void //
wuffs_base__store_u48be(uint8_t* p, uint64_t x) {
p[0] = x >> 40;
p[1] = x >> 32;
p[2] = x >> 24;
p[3] = x >> 16;
p[4] = x >> 8;
p[5] = x >> 0;
}
static inline void //
wuffs_base__store_u48le(uint8_t* p, uint64_t x) {
p[0] = x >> 0;
p[1] = x >> 8;
p[2] = x >> 16;
p[3] = x >> 24;
p[4] = x >> 32;
p[5] = x >> 40;
}
static inline void //
wuffs_base__store_u56be(uint8_t* p, uint64_t x) {
p[0] = x >> 48;
p[1] = x >> 40;
p[2] = x >> 32;
p[3] = x >> 24;
p[4] = x >> 16;
p[5] = x >> 8;
p[6] = x >> 0;
}
static inline void //
wuffs_base__store_u56le(uint8_t* p, uint64_t x) {
p[0] = x >> 0;
p[1] = x >> 8;
p[2] = x >> 16;
p[3] = x >> 24;
p[4] = x >> 32;
p[5] = x >> 40;
p[6] = x >> 48;
}
static inline void //
wuffs_base__store_u64be(uint8_t* p, uint64_t x) {
p[0] = x >> 56;
p[1] = x >> 48;
p[2] = x >> 40;
p[3] = x >> 32;
p[4] = x >> 24;
p[5] = x >> 16;
p[6] = x >> 8;
p[7] = x >> 0;
}
static inline void //
wuffs_base__store_u64le(uint8_t* p, uint64_t x) {
p[0] = x >> 0;
p[1] = x >> 8;
p[2] = x >> 16;
p[3] = x >> 24;
p[4] = x >> 32;
p[5] = x >> 40;
p[6] = x >> 48;
p[7] = 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__slice_u8){
.ptr = t.ptr + (t.stride * y),
.len = t.width,
});
}
return ((wuffs_base__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)
static inline wuffs_base__range_ii_u32 //
wuffs_base__utility__make_range_ii_u32(const wuffs_base__utility* ignored,
uint32_t min_incl,
uint32_t max_incl) {
return ((wuffs_base__range_ii_u32){
.min_incl = min_incl,
.max_incl = max_incl,
});
}
static inline wuffs_base__range_ie_u32 //
wuffs_base__utility__make_range_ie_u32(const wuffs_base__utility* ignored,
uint32_t min_incl,
uint32_t max_excl) {
return ((wuffs_base__range_ie_u32){
.min_incl = min_incl,
.max_excl = max_excl,
});
}
static inline wuffs_base__range_ii_u64 //
wuffs_base__utility__make_range_ii_u64(const wuffs_base__utility* ignored,
uint64_t min_incl,
uint64_t max_incl) {
return ((wuffs_base__range_ii_u64){
.min_incl = min_incl,
.max_incl = max_incl,
});
}
static inline wuffs_base__range_ie_u64 //
wuffs_base__utility__make_range_ie_u64(const wuffs_base__utility* ignored,
uint64_t min_incl,
uint64_t max_excl) {
return ((wuffs_base__range_ie_u64){
.min_incl = min_incl,
.max_excl = max_excl,
});
}
static inline wuffs_base__rect_ii_u32 //
wuffs_base__utility__make_rect_ii_u32(const wuffs_base__utility* ignored,
uint32_t min_incl_x,
uint32_t min_incl_y,
uint32_t max_incl_x,
uint32_t max_incl_y) {
return ((wuffs_base__rect_ii_u32){
.min_incl_x = min_incl_x,
.min_incl_y = min_incl_y,
.max_incl_x = max_incl_x,
.max_incl_y = max_incl_y,
});
}
static inline wuffs_base__rect_ie_u32 //
wuffs_base__utility__make_rect_ie_u32(const wuffs_base__utility* ignored,
uint32_t min_incl_x,
uint32_t min_incl_y,
uint32_t max_excl_x,
uint32_t max_excl_y) {
return ((wuffs_base__rect_ie_u32){
.min_incl_x = min_incl_x,
.min_incl_y = min_incl_y,
.max_excl_x = max_excl_x,
.max_excl_y = max_excl_y,
});
}
// ---------------- I/O
static inline bool //
wuffs_base__io_buffer__is_valid(wuffs_base__io_buffer buf) {
return (buf.data.ptr || (buf.data.len == 0)) &&
(buf.data.len >= buf.meta.wi) && (buf.meta.wi >= buf.meta.ri);
}
// TODO: wuffs_base__io_reader__is_eof is no longer used by Wuffs per se, but
// it might be handy to programs that use Wuffs. Either delete it, or promote
// it to the public API.
//
// If making this function public (i.e. moving it to base-header.h), it also
// needs to allow NULL (i.e. implicit, callee-calculated) mark/limit.
static inline bool //
wuffs_base__io_reader__is_eof(wuffs_base__io_reader o) {
wuffs_base__io_buffer* buf = o.private_impl.buf;
return buf && buf->meta.closed &&
(buf->data.ptr + buf->meta.wi == o.private_impl.limit);
}
static inline bool //
wuffs_base__io_reader__is_valid(wuffs_base__io_reader o) {
wuffs_base__io_buffer* buf = o.private_impl.buf;
// Note: if making this function public (i.e. moving it to base-header.h), it
// also needs to allow NULL (i.e. implicit, callee-calculated) mark/limit.
return buf ? ((buf->data.ptr <= o.private_impl.mark) &&
(o.private_impl.mark <= o.private_impl.limit) &&
(o.private_impl.limit <= buf->data.ptr + buf->data.len))
: ((o.private_impl.mark == NULL) &&
(o.private_impl.limit == NULL));
}
static inline bool //
wuffs_base__io_writer__is_valid(wuffs_base__io_writer o) {
wuffs_base__io_buffer* buf = o.private_impl.buf;
// Note: if making this function public (i.e. moving it to base-header.h), it
// also needs to allow NULL (i.e. implicit, callee-calculated) mark/limit.
return buf ? ((buf->data.ptr <= o.private_impl.mark) &&
(o.private_impl.mark <= o.private_impl.limit) &&
(o.private_impl.limit <= buf->data.ptr + buf->data.len))
: ((o.private_impl.mark == NULL) &&
(o.private_impl.limit == NULL));
}
static inline uint32_t //
wuffs_base__io_writer__copy_n_from_history(uint8_t** ptr_iop_w,
uint8_t* io0_w,
uint8_t* io1_w,
uint32_t length,
uint32_t distance) {
if (!distance) {
return 0;
}
uint8_t* p = *ptr_iop_w;
if ((size_t)(p - io0_w) < (size_t)(distance)) {
return 0;
}
uint8_t* q = p - distance;
size_t n = io1_w - p;
if ((size_t)(length) > n) {
length = n;
} else {
n = 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 - io0_w)
// - length <= (io1_w - *ptr_iop_w)
static inline uint32_t //
wuffs_base__io_writer__copy_n_from_history_fast(uint8_t** ptr_iop_w,
uint8_t* io0_w,
uint8_t* io1_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* io1_w,
uint32_t length,
uint8_t** ptr_iop_r,
uint8_t* io1_r) {
uint8_t* iop_w = *ptr_iop_w;
size_t n = length;
if (n > ((size_t)(io1_w - iop_w))) {
n = io1_w - iop_w;
}
uint8_t* iop_r = *ptr_iop_r;
if (n > ((size_t)(io1_r - iop_r))) {
n = io1_r - iop_r;
}
if (n > 0) {
memmove(iop_w, iop_r, n);
*ptr_iop_w += n;
*ptr_iop_r += n;
}
return n;
}
static inline uint64_t //
wuffs_base__io_writer__copy_from_slice(uint8_t** ptr_iop_w,
uint8_t* io1_w,
wuffs_base__slice_u8 src) {
uint8_t* iop_w = *ptr_iop_w;
size_t n = src.len;
if (n > ((size_t)(io1_w - iop_w))) {
n = io1_w - iop_w;
}
if (n > 0) {
memmove(iop_w, src.ptr, n);
*ptr_iop_w += n;
}
return n;
}
static inline uint32_t //
wuffs_base__io_writer__copy_n_from_slice(uint8_t** ptr_iop_w,
uint8_t* io1_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)(io1_w - iop_w))) {
n = io1_w - iop_w;
}
if (n > 0) {
memmove(iop_w, src.ptr, n);
*ptr_iop_w += n;
}
return n;
}
static inline wuffs_base__empty_struct //
wuffs_base__io_reader__set(wuffs_base__io_reader* o,
wuffs_base__io_buffer* b,
uint8_t** ptr_iop_r,
uint8_t** ptr_io1_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;
o->private_impl.buf = b;
o->private_impl.mark = data.ptr;
o->private_impl.limit = data.ptr + data.len;
*ptr_iop_r = data.ptr;
*ptr_io1_r = data.ptr + data.len;
return ((wuffs_base__empty_struct){});
}
static inline wuffs_base__empty_struct //
wuffs_base__io_reader__set_limit(wuffs_base__io_reader* o,
uint8_t* iop_r,
uint64_t limit) {
if (o && (((size_t)(o->private_impl.limit - iop_r)) > limit)) {
o->private_impl.limit = iop_r + limit;
}
return ((wuffs_base__empty_struct){});
}
static inline wuffs_base__empty_struct //
wuffs_base__io_reader__set_mark(wuffs_base__io_reader* o, uint8_t* mark) {
o->private_impl.mark = mark;
return ((wuffs_base__empty_struct){});
}
static inline wuffs_base__slice_u8 //
wuffs_base__io_reader__take(uint8_t** ptr_iop_r, uint8_t* io1_r, uint64_t n) {
if (n <= ((size_t)(io1_r - *ptr_iop_r))) {
uint8_t* p = *ptr_iop_r;
*ptr_iop_r += n;
return ((wuffs_base__slice_u8){
.ptr = p,
.len = n,
});
}
return ((wuffs_base__slice_u8){});
}
static inline wuffs_base__empty_struct //
wuffs_base__io_writer__set(wuffs_base__io_writer* o,
wuffs_base__io_buffer* b,
uint8_t** ptr_iop_w,
uint8_t** ptr_io1_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;
o->private_impl.buf = b;
o->private_impl.mark = data.ptr;
o->private_impl.limit = data.ptr + data.len;
*ptr_iop_w = data.ptr;
*ptr_io1_w = data.ptr + data.len;
return ((wuffs_base__empty_struct){});
}
static inline wuffs_base__empty_struct //
wuffs_base__io_writer__set_mark(wuffs_base__io_writer* o, uint8_t* mark) {
o->private_impl.mark = mark;
return ((wuffs_base__empty_struct){});
}
// ---------------- I/O (Utility)
static inline wuffs_base__io_reader //
wuffs_base__utility__null_io_reader(const wuffs_base__utility* ignored) {
return ((wuffs_base__io_reader){});
}
static inline wuffs_base__io_writer //
wuffs_base__utility__null_io_writer(const wuffs_base__utility* ignored) {
return ((wuffs_base__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__suspension__short_read = "$base: short read";
const char* wuffs_base__suspension__short_write = "$base: short write";
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__check_wuffs_version_not_applicable =
"?base: check_wuffs_version not applicable";
const char* wuffs_base__error__check_wuffs_version_missing =
"?base: check_wuffs_version missing";
const char* wuffs_base__error__disabled_by_previous_error =
"?base: disabled by previous error";
const char* wuffs_base__error__interleaved_coroutine_calls =
"?base: interleaved coroutine calls";
// ---------------- 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_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;
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 -= 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 -= 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;
}
void //
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;
}
// 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__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__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;
}
uint64_t //
wuffs_base__pixel_swizzler__swizzle_packed(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
#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__check_wuffs_version(wuffs_adler32__hasher* self,
size_t sizeof_star_self,
uint64_t wuffs_version) {
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 (self->private_impl.magic != 0) {
return wuffs_base__error__check_wuffs_version_not_applicable;
}
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
WUFFS_BASE__MAYBE_STATIC uint32_t //
wuffs_adler32__hasher__update(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 = {};
wuffs_base__slice_u8 v_p = {};
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] = {
{
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,
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3384583981, 338329256, 1767471344, 3033506165, 151375291, 3566408766,
4091789579, 779425934, 2478797888, 1311354309, 861580189, 4006375960,
1392910038, 2391852883, 2929327945, 1930372812, 3469036034, 324244359,
1847629279, 3015068762, 243015828, 3555391761, 4103744548, 688715169,
2496043375, 1229996266, 874727090, 3920994103, 1417671673, 2313759356,
446585235, 3339223062, 2059594968, 2807313757, 3660002053, 129100416,
3128657486, 1743609803, 1084066558, 2634765179, 549535669, 4250396208,
2149900392, 1571961325, 3765982499, 1039043750,
},
{
0, 2635063670, 3782132909, 2086741467, 430739227, 2225303149,
4173482934, 1707977408, 861478454, 2924937024, 3526875803, 1329085421,
720736557, 3086643291, 3415954816, 1452586230, 1722956908, 4223524122,
2279405761, 450042295, 2132718455, 3792785921, 2658170842, 58693292,
1441473114, 3370435372, 3028674295, 696911745, 1279765825, 3511176247,
2905172460, 807831706, 3445913816, 1349228974, 738901109, 2969918723,
3569940419, 1237784245, 900084590, 2829701656, 4265436910, 1664255896,
525574723, 2187084597, 3885099509, 2057177219, 117386584, 2616249390,
2882946228, 920233410, 1253605401, 3619119471, 2994391983, 796207833,
1393823490, 3457937012, 2559531650, 92322804, 2044829231, 3840835417,
2166609305, 472659183, 1615663412, 4249022530, 1102706673, 3702920839,
2698457948, 1037619754, 1477802218, 3306854812, 3111894087, 611605809,
1927342535, 4025419953, 2475568490, 243387420, 1800169180, 4131620778,
2317525617, 388842247, 655084445, 3120835307, 3328511792, 1533734470,
1051149446, 2745738736, 3754524715, 1120297309, 340972971, 2304586973,
4114354438, 1748234352, 234773168, 2431761350, 3968900637, 1906278251,
2363330345, 299003487, 1840466820, 4038896370, 2507210802, 142532932,
1948239007, 3910149609, 3213136159, 579563625, 1592415666, 3286611140,
2787646980, 992477042, 1195825833, 3662232543, 3933188933, 2002801203,
184645608, 2517538462, 4089658462, 1858919720, 313391347, 2409765253,
3644239219, 1144605701, 945318366, 2773977256, 3231326824, 1570095902,
569697989, 3170568115, 2205413346, 511446676, 1646078799, 4279421497,
2598330617, 131105167, 2075239508, 3871229218, 2955604436, 757403810,
1363424633, 3427521551, 2844163791, 881434553, 1223211618, 3588709140,
3854685070, 2026779384, 78583587, 2577462869, 4235025557, 1633861091,
486774840, 2148301134, 3600338360, 1268198606, 938871061, 2868504675,
3476308643, 1379640277, 777684494, 3008718712, 1310168890, 3541595724,
2943964055, 846639841, 1471879201, 3400857943, 3067468940, 735723002,
2102298892, 3762382970, 2619362721, 19901655, 1692534295, 4193118049,
2240594618, 411247564, 681945942, 3047836192, 3385552891, 1422167693,
822682701, 2886124859, 3496468704, 1298661782, 469546336, 2264093718,
4203901389, 1738379451, 38812283, 2673859341, 3812556502, 2117148576,
3268024339, 1606809957, 598006974, 3198893512, 3680933640, 1181316734,
973624229, 2802299603, 4052944421, 1822222163, 285065864, 2381456382,
3896478014, 1966106696, 156323219, 2489232613, 2759337087, 964150537,
1159127250, 3625517476, 3184831332, 551242258, 1555722185, 3249901247,
2535537225, 170842943, 1984954084, 3946848146, 2391651666, 327308324,
1877176831, 4075589769, 263086283, 2460058045, 4005602406, 1942963472,
369291216, 2332888742, 4151061373, 1784924683, 1022852861, 2717425547,
3717839440, 1083595558, 626782694, 3092517008, 3291821387, 1497027645,
1763466407, 4094934481, 2289211402, 360544636, 1890636732, 3988730570,
2447251217, 215086695, 1514488465, 3343557607, 3140191804, 639919946,
1139395978, 3739626748, 2726758695, 1065936977,
},
{
0, 3120290792, 2827399569, 293431929, 2323408227, 864534155,
586863858, 2600537882, 3481914503, 1987188591, 1729068310, 3740575486,
1173727716, 4228805132, 3983743093, 1418249117, 1147313999, 4254680231,
3974377182, 1428157750, 3458136620, 2011505092, 1721256893, 3747844181,
2347455432, 839944224, 594403929, 2593536433, 26687147, 3094146371,
2836498234, 283794642, 2294627998, 826205558, 541298447, 2578994407,
45702141, 3141697557, 2856315500, 331624836, 1196225049, 4273416689,
4023010184, 1446090848, 3442513786, 1959480466, 1706436331, 3696098563,
3433538001, 1968994873, 1679888448, 3722103720, 1188807858, 4280295258,
3999102243, 1470541515, 53374294, 3134568126, 2879970503, 307431215,
2303854645, 816436189, 567589284, 2553242188, 3405478781, 1929420949,
1652411116, 3682996484, 1082596894, 4185703926, 3892424591, 1375368295,
91404282, 3163122706, 2918450795, 336584067, 2400113305, 922028401,
663249672, 2658384096, 2392450098, 929185754, 639587747, 2682555979,
82149713, 3172883129, 2892181696, 362343208, 1091578037, 4176212829,
3918960932, 1349337804, 3412872662, 1922537022, 1676344391, 3658557359,
1111377379, 4224032267, 3937989746, 1396912026, 3359776896, 1908013928,
1623494929, 3644803833, 2377615716, 877417100, 623982837, 2630542109,
130804743, 3190831087, 2941083030, 381060734, 106748588, 3215393092,
2933549885, 388083925, 2350956495, 903570471, 614862430, 2640172470,
3386185259, 1882115523, 1632872378, 3634920530, 1135178568, 4199721120,
3945775833, 1389631793, 1317531835, 4152109907, 3858841898, 1610259138,
3304822232, 2097172016, 1820140617, 3582394273, 2165193788, 955639764,
696815021, 2423477829, 192043359, 2995356343, 2750736590, 437203750,
182808564, 3005133852, 2724453989, 462947725, 2157513367, 962777471,
673168134, 2447663342, 3312231283, 2090301595, 1844056802, 3557935370,
1326499344, 4142603768, 3885397889, 1584245865, 3326266917, 2142836173,
1858371508, 3611272284, 1279175494, 4123357358, 3837270743, 1564721471,
164299426, 2955991370, 2706223923, 414607579, 2209834945, 978107433,
724686416, 2462715320, 2183156074, 1004243586, 715579643, 2472360723,
140260361, 2980573153, 2698675608, 421617264, 1302961645, 4099032581,
3845074044, 1557460884, 3352688782, 2116952934, 1867729183, 3601371895,
2222754758, 1032278062, 754596439, 2499928511, 234942117, 3086693709,
2793824052, 528319708, 1274365761, 4061043881, 3816027856, 1518873912,
3246989858, 2020800970, 1762628531, 3505670235, 3223196809, 2045103969,
1754834200, 3512958704, 1247965674, 4086934018, 3806642299, 1528765331,
261609486, 3060532198, 2802936223, 518697591, 2246819181, 1007707781,
762121468, 2492913428, 213497176, 3041029808, 2755593417, 499441441,
2261110843, 1061030867, 776167850, 2545465922, 3274734047, 2060165687,
1807140942, 3528266662, 1229724860, 4038575956, 3788156205, 1479636677,
1222322711, 4045468159, 3764231046, 1504067694, 3265744756, 2069664924,
1780612837, 3554288909, 2270357136, 1051278712, 802445057, 2519698665,
221152243, 3033880603, 2779263586, 475261322,
},
{
0, 2926088593, 2275419491, 701019378, 3560000647, 2052709654,
1402038756, 4261017717, 1930665807, 3715829470, 4105419308, 1524313021,
2804077512, 155861593, 545453739, 2397726522, 3861331614, 1213181711,
1636244477, 3488582252, 840331801, 2625561480, 3048626042, 467584747,
2503254481, 995897408, 311723186, 3170637091, 1090907478, 4016929991,
3332753461, 1758288292, 390036349, 3109546732, 2426363422, 1056427919,
3272488954, 1835443819, 1152258713, 3938878216, 1680663602, 3393484195,
3817652561, 1306808512, 2954733749, 510998820, 935169494, 2580880455,
4044899811, 1601229938, 1991794816, 3637571857, 623446372, 2336332021,
2726898695, 216120726, 2181814956, 744704829, 95158223, 2881711710,
1446680107, 4166125498, 3516576584, 2146575065, 780072698, 2148951915,
2849952665, 129384968, 4199529085, 1411853292, 2112855838, 3548843663,
1567451573, 4077254692, 3670887638, 1957027143, 2304517426, 657765539,
251396177, 2694091200, 3361327204, 1714510325, 1341779207, 3784408214,
476611811, 2986349938, 2613617024, 899690513, 3142211371, 354600634,
1021997640, 2458051545, 1870338988, 3239283261, 3906682575, 1186180958,
960597383, 2536053782, 3202459876, 277428597, 3983589632, 1125666961,
1792074851, 3300423154, 1246892744, 3829039961, 3455203243, 1671079482,
2657312335, 806080478, 432241452, 3081497277, 3748049689, 1896751752,
1489409658, 4138600427, 190316446, 2772397583, 2365053693, 580864876,
2893360214, 35503559, 735381813, 2243795108, 2017747153, 3593269568,
4293150130, 1368183843, 1560145396, 4069882981, 3680356503, 1966430470,
2295112051, 648294626, 258769936, 2701399425, 804156091, 2173100842,
2823706584, 103204425, 4225711676, 1438101421, 2088704863, 3524758222,
3134903146, 347226875, 1031468553, 2467456920, 1860935661, 3229814396,
3914054286, 1193487135, 3385412645, 1738661300, 1315531078, 3758225623,
502792354, 3012596019, 2589468097, 875607120, 1271043721, 3853125400,
3429020650, 1644831355, 2683558414, 832261023, 408158061, 3057348348,
953223622, 2528745559, 3211865253, 286899508, 3974120769, 1116263632,
1799381026, 3307794867, 2917509143, 59586950, 709201268, 2217549029,
2043995280, 3619452161, 4269064691, 1344032866, 3740677976, 1889445577,
1498812987, 4148069290, 180845535, 2762992206, 2372361916, 588238637,
1921194766, 3706423967, 4112727661, 1531686908, 2796705673, 148555288,
554857194, 2407195515, 26248257, 2952271312, 2251333922, 676868275,
3584149702, 2076793175, 1375858085, 4234771508, 2493785488, 986493953,
319029491, 3178008930, 1083533591, 4009621638, 3342158964, 1767759333,
3887577823, 1239362382, 1612160956, 3464433197, 864482904, 2649647049,
3022443323, 441336490, 1706844275, 3419730402, 3793503504, 1282724993,
2978819316, 535149925, 908921239, 2554697734, 380632892, 3100077741,
2433735263, 1063734222, 3265180603, 1828069930, 1161729752, 3948283721,
2207997677, 770953084, 71007118, 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__check_wuffs_version(wuffs_crc32__ieee_hasher* self,
size_t sizeof_star_self,
uint64_t wuffs_version) {
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 (self->private_impl.magic != 0) {
return wuffs_base__error__check_wuffs_version_not_applicable;
}
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
WUFFS_BASE__MAYBE_STATIC uint32_t //
wuffs_crc32__ieee_hasher__update(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 = {};
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] = {
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] = {
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] = {
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] = {
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,
};
// ---------------- Private Initializer Prototypes
// ---------------- Private Function Prototypes
static wuffs_base__status //
wuffs_deflate__decoder__decode_blocks(wuffs_deflate__decoder* self,
wuffs_base__io_writer a_dst,
wuffs_base__io_reader a_src);
static wuffs_base__status //
wuffs_deflate__decoder__decode_uncompressed(wuffs_deflate__decoder* self,
wuffs_base__io_writer a_dst,
wuffs_base__io_reader 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_reader 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_writer a_dst,
wuffs_base__io_reader a_src);
static wuffs_base__status //
wuffs_deflate__decoder__decode_huffman_slow(wuffs_deflate__decoder* self,
wuffs_base__io_writer a_dst,
wuffs_base__io_reader a_src);
// ---------------- Initializer Implementations
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_deflate__decoder__check_wuffs_version(wuffs_deflate__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version) {
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 (self->private_impl.magic != 0) {
return wuffs_base__error__check_wuffs_version_not_applicable;
}
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.decode_io_writer
WUFFS_BASE__MAYBE_STATIC wuffs_base__status //
wuffs_deflate__decoder__decode_io_writer(wuffs_deflate__decoder* self,
wuffs_base__io_writer a_dst,
wuffs_base__io_reader 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__check_wuffs_version_missing;
}
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;
wuffs_base__status v_status = NULL;
wuffs_base__slice_u8 v_written = {};
uint64_t v_n_copied = 0;
uint32_t v_already_full = 0;
uint8_t* iop_a_dst = NULL;
uint8_t* io0_a_dst = NULL;
uint8_t* io1_a_dst = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_dst);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_dst);
if (a_dst.private_impl.buf) {
iop_a_dst =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->meta.wi;
if (!a_dst.private_impl.mark) {
a_dst.private_impl.mark = iop_a_dst;
a_dst.private_impl.limit =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->data.len;
}
if (a_dst.private_impl.buf->meta.closed) {
a_dst.private_impl.limit = iop_a_dst;
}
io0_a_dst = a_dst.private_impl.mark;
io1_a_dst = a_dst.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_io_writer[0].coro_susp_point;
if (coro_susp_point) {
}
switch (coro_susp_point) {
WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;
while (true) {
wuffs_base__io_writer__set_mark(&a_dst, iop_a_dst);
{
if (a_dst.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->data.ptr;
}
wuffs_base__status t_0 =
wuffs_deflate__decoder__decode_blocks(self, a_dst, a_src);
if (a_dst.private_impl.buf) {
iop_a_dst = a_dst.private_impl.buf->data.ptr +
a_dst.private_impl.buf->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;
}
v_written = ((wuffs_base__slice_u8){
.ptr = a_dst.private_impl.mark,
.len = (size_t)(iop_a_dst - a_dst.private_impl.mark),
});
if (((uint64_t)(v_written.len)) >= 32768) {
v_written = wuffs_base__slice_u8__suffix(v_written, 32768);
wuffs_base__slice_u8__copy_from_slice(
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_history,
.len = 32768,
}),
v_written);
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__slice_u8){
.ptr = self->private_impl.f_history,
.len = 32768,
}),
(self->private_impl.f_history_index & 32767)),
v_written);
if (v_n_copied < ((uint64_t)(v_written.len))) {
v_written = wuffs_base__slice_u8__subslice_i(v_written, v_n_copied);
v_n_copied = wuffs_base__slice_u8__copy_from_slice(
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_history,
.len = 32768,
}),
v_written);
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);
}
}
status = v_status;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1);
}
goto ok;
ok:
self->private_impl.c_decode_io_writer[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_io_writer[0].coro_susp_point = coro_susp_point;
self->private_impl.active_coroutine = 1;
goto exit;
exit:
if (a_dst.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->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_writer a_dst,
wuffs_base__io_reader 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 = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_blocks[0].coro_susp_point;
if (coro_susp_point) {
v_final = self->private_impl.c_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 == io1_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.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
status =
wuffs_deflate__decoder__decode_uncompressed(self, a_dst, a_src);
if (a_src.private_impl.buf) {
iop_a_src = a_src.private_impl.buf->data.ptr +
a_src.private_impl.buf->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.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
status = wuffs_deflate__decoder__init_dynamic_huffman(self, a_src);
if (a_src.private_impl.buf) {
iop_a_src = a_src.private_impl.buf->data.ptr +
a_src.private_impl.buf->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.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
v_status =
wuffs_deflate__decoder__decode_huffman_fast(self, a_dst, a_src);
if (a_src.private_impl.buf) {
iop_a_src = a_src.private_impl.buf->data.ptr +
a_src.private_impl.buf->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.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
status =
wuffs_deflate__decoder__decode_huffman_slow(self, a_dst, a_src);
if (a_src.private_impl.buf) {
iop_a_src = a_src.private_impl.buf->data.ptr +
a_src.private_impl.buf->meta.ri;
}
if (status) {
goto suspend;
}
if (self->private_impl.f_end_of_block) {
goto label_0_continue;
}
}
}
goto ok;
ok:
self->private_impl.c_decode_blocks[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_blocks[0].coro_susp_point = coro_susp_point;
self->private_impl.c_decode_blocks[0].v_final = v_final;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_writer a_dst,
wuffs_base__io_reader 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 = NULL;
uint8_t* io1_a_dst = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_dst);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_dst);
if (a_dst.private_impl.buf) {
iop_a_dst =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->meta.wi;
if (!a_dst.private_impl.mark) {
a_dst.private_impl.mark = iop_a_dst;
a_dst.private_impl.limit =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->data.len;
}
if (a_dst.private_impl.buf->meta.closed) {
a_dst.private_impl.limit = iop_a_dst;
}
io0_a_dst = a_dst.private_impl.mark;
io1_a_dst = a_dst.private_impl.limit;
}
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_uncompressed[0].coro_susp_point;
if (coro_susp_point) {
v_length = self->private_impl.c_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(io1_a_src - iop_a_src >= 4)) {
t_0 = wuffs_base__load_u32le(iop_a_src);
iop_a_src += 4;
} else {
self->private_impl.c_decode_uncompressed[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch =
&self->private_impl.c_decode_uncompressed[0].scratch;
uint32_t num_bits_0 = *scratch >> 56;
*scratch <<= 8;
*scratch >>= 8;
*scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0;
if (num_bits_0 == 24) {
t_0 = *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, io1_a_dst, v_length, &iop_a_src, io1_a_src);
if (v_length <= v_n_copied) {
status = NULL;
goto ok;
}
v_length -= v_n_copied;
if (((uint64_t)(io1_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.c_decode_uncompressed[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_uncompressed[0].coro_susp_point = coro_susp_point;
self->private_impl.c_decode_uncompressed[0].v_length = v_length;
goto exit;
exit:
if (a_dst.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->data.ptr;
}
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_impl.f_code_lengths[v_i] = 8;
v_i += 1;
}
while (v_i < 256) {
self->private_impl.f_code_lengths[v_i] = 9;
v_i += 1;
}
while (v_i < 280) {
self->private_impl.f_code_lengths[v_i] = 7;
v_i += 1;
}
while (v_i < 288) {
self->private_impl.f_code_lengths[v_i] = 8;
v_i += 1;
}
while (v_i < 320) {
self->private_impl.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_reader 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 = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_init_dynamic_huffman[0].coro_susp_point;
if (coro_susp_point) {
v_bits = self->private_impl.c_init_dynamic_huffman[0].v_bits;
v_n_bits = self->private_impl.c_init_dynamic_huffman[0].v_n_bits;
v_n_lit = self->private_impl.c_init_dynamic_huffman[0].v_n_lit;
v_n_dist = self->private_impl.c_init_dynamic_huffman[0].v_n_dist;
v_n_clen = self->private_impl.c_init_dynamic_huffman[0].v_n_clen;
v_i = self->private_impl.c_init_dynamic_huffman[0].v_i;
v_mask = self->private_impl.c_init_dynamic_huffman[0].v_mask;
v_table_entry = self->private_impl.c_init_dynamic_huffman[0].v_table_entry;
v_n_extra_bits =
self->private_impl.c_init_dynamic_huffman[0].v_n_extra_bits;
v_rep_symbol = self->private_impl.c_init_dynamic_huffman[0].v_rep_symbol;
v_rep_count = self->private_impl.c_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 == io1_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 == io1_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_impl.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_impl.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_impl.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 == io1_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_impl.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_impl.f_code_lengths[(v_i - 1)];
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 == io1_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_impl.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_impl.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.c_init_dynamic_huffman[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_init_dynamic_huffman[0].coro_susp_point =
coro_susp_point;
self->private_impl.c_init_dynamic_huffman[0].v_bits = v_bits;
self->private_impl.c_init_dynamic_huffman[0].v_n_bits = v_n_bits;
self->private_impl.c_init_dynamic_huffman[0].v_n_lit = v_n_lit;
self->private_impl.c_init_dynamic_huffman[0].v_n_dist = v_n_dist;
self->private_impl.c_init_dynamic_huffman[0].v_n_clen = v_n_clen;
self->private_impl.c_init_dynamic_huffman[0].v_i = v_i;
self->private_impl.c_init_dynamic_huffman[0].v_mask = v_mask;
self->private_impl.c_init_dynamic_huffman[0].v_table_entry = v_table_entry;
self->private_impl.c_init_dynamic_huffman[0].v_n_extra_bits = v_n_extra_bits;
self->private_impl.c_init_dynamic_huffman[0].v_rep_symbol = v_rep_symbol;
self->private_impl.c_init_dynamic_huffman[0].v_rep_count = v_rep_count;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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] = {};
uint32_t v_i = 0;
uint32_t v_remaining = 0;
uint16_t v_offsets[16] = {};
uint32_t v_n_symbols = 0;
uint32_t v_count = 0;
uint16_t v_symbols[320] = {};
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_impl.f_code_lengths[v_i]] >= 320) {
return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state;
}
v_counts[self->private_impl.f_code_lengths[v_i]] += 1;
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) {
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_impl.f_code_lengths[v_i] != 0) {
if (v_offsets[self->private_impl.f_code_lengths[v_i]] >= 320) {
return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state;
}
v_symbols[v_offsets[self->private_impl.f_code_lengths[v_i]]] =
((uint16_t)((v_i - a_n_codes0)));
v_offsets[self->private_impl.f_code_lengths[v_i]] += 1;
}
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_impl.f_code_lengths[(
a_n_codes0 + ((uint32_t)(v_symbols[0])))]));
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_impl.f_code_lengths[(
a_n_codes0 + ((uint32_t)(v_symbols[v_i])))]));
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)) > 1234) {
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_impl.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;
}
v_counts[v_prev_cl] -= 1;
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)) >= 1234) {
return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state;
}
self->private_impl
.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_writer a_dst,
wuffs_base__io_reader 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 = NULL;
uint8_t* io1_a_dst = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_dst);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_dst);
if (a_dst.private_impl.buf) {
iop_a_dst =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->meta.wi;
if (!a_dst.private_impl.mark) {
a_dst.private_impl.mark = iop_a_dst;
a_dst.private_impl.limit =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->data.len;
}
if (a_dst.private_impl.buf->meta.closed) {
a_dst.private_impl.limit = iop_a_dst;
}
io0_a_dst = a_dst.private_impl.mark;
io1_a_dst = a_dst.private_impl.limit;
}
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
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)(io1_a_dst - iop_a_dst)) >= 258) &&
(((uint64_t)(io1_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__return_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__return_empty_struct());
v_n_bits += 8;
} else {
}
v_table_entry = self->private_impl.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__return_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__return_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__return_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);
if ((v_redir_top + (v_bits & v_redir_mask)) >= 1234) {
status =
wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state;
goto exit;
}
v_table_entry = self->private_impl
.f_huffs[0][(v_redir_top + (v_bits & v_redir_mask))];
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__return_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__return_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__return_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__return_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__return_empty_struct());
v_n_bits += 8;
} else {
}
v_table_entry = self->private_impl.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__return_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__return_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);
if ((v_redir_top + (v_bits & v_redir_mask)) >= 1234) {
status =
wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state;
goto exit;
}
v_table_entry = self->private_impl
.f_huffs[1][(v_redir_top + (v_bits & v_redir_mask))];
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__return_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__return_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 - a_dst.private_impl.mark))) {
v_hlen = 0;
v_hdist =
((uint32_t)((((uint64_t)((v_dist_minus_1 + 1))) -
((uint64_t)(iop_a_dst - a_dst.private_impl.mark)))));
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, io1_a_dst, v_hlen,
wuffs_base__slice_u8__subslice_i(
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_history,
.len = 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, io1_a_dst, v_hlen,
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_history,
.len = 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 - a_dst.private_impl.mark))) {
status = wuffs_deflate__error__internal_error_inconsistent_distance;
goto exit;
}
}
wuffs_base__io_writer__copy_n_from_history_fast(
&iop_a_dst, a_dst.private_impl.mark, io1_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 > io0_a_src) {
(iop_a_src--, wuffs_base__return_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.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->data.ptr;
}
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_writer a_dst,
wuffs_base__io_reader 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 = NULL;
uint8_t* io1_a_dst = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_dst);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_dst);
if (a_dst.private_impl.buf) {
iop_a_dst =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->meta.wi;
if (!a_dst.private_impl.mark) {
a_dst.private_impl.mark = iop_a_dst;
a_dst.private_impl.limit =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->data.len;
}
if (a_dst.private_impl.buf->meta.closed) {
a_dst.private_impl.limit = iop_a_dst;
}
io0_a_dst = a_dst.private_impl.mark;
io1_a_dst = a_dst.private_impl.limit;
}
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_huffman_slow[0].coro_susp_point;
if (coro_susp_point) {
v_bits = self->private_impl.c_decode_huffman_slow[0].v_bits;
v_n_bits = self->private_impl.c_decode_huffman_slow[0].v_n_bits;
v_table_entry = self->private_impl.c_decode_huffman_slow[0].v_table_entry;
v_table_entry_n_bits =
self->private_impl.c_decode_huffman_slow[0].v_table_entry_n_bits;
v_lmask = self->private_impl.c_decode_huffman_slow[0].v_lmask;
v_dmask = self->private_impl.c_decode_huffman_slow[0].v_dmask;
v_redir_top = self->private_impl.c_decode_huffman_slow[0].v_redir_top;
v_redir_mask = self->private_impl.c_decode_huffman_slow[0].v_redir_mask;
v_length = self->private_impl.c_decode_huffman_slow[0].v_length;
v_dist_minus_1 = self->private_impl.c_decode_huffman_slow[0].v_dist_minus_1;
v_hlen = self->private_impl.c_decode_huffman_slow[0].v_hlen;
v_hdist = self->private_impl.c_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.c_decode_huffman_slow[0].coro_susp_point != 0)) {
while (true) {
v_table_entry = self->private_impl.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 == io1_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 == io1_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) {
if ((v_redir_top + (v_bits & v_redir_mask)) >= 1234) {
status =
wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state;
goto exit;
}
v_table_entry =
self->private_impl
.f_huffs[0][(v_redir_top + (v_bits & v_redir_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_2_break;
}
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_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 == io1_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 == io1_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_impl.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 == io1_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) {
if ((v_redir_top + (v_bits & v_redir_mask)) >= 1234) {
status =
wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state;
goto exit;
}
v_table_entry =
self->private_impl
.f_huffs[1][(v_redir_top + (v_bits & v_redir_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_4_break;
}
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_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 == io1_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 - a_dst.private_impl.mark))) {
v_hdist =
((uint32_t)((((uint64_t)((v_dist_minus_1 + 1))) -
((uint64_t)(iop_a_dst - a_dst.private_impl.mark)))));
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, io1_a_dst, v_hlen,
wuffs_base__slice_u8__subslice_i(
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_history,
.len = 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, io1_a_dst, v_hlen,
wuffs_base__slice_u8__subslice_i(
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_history,
.len = 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, a_dst.private_impl.mark, io1_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.c_decode_huffman_slow[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_huffman_slow[0].coro_susp_point = coro_susp_point;
self->private_impl.c_decode_huffman_slow[0].v_bits = v_bits;
self->private_impl.c_decode_huffman_slow[0].v_n_bits = v_n_bits;
self->private_impl.c_decode_huffman_slow[0].v_table_entry = v_table_entry;
self->private_impl.c_decode_huffman_slow[0].v_table_entry_n_bits =
v_table_entry_n_bits;
self->private_impl.c_decode_huffman_slow[0].v_lmask = v_lmask;
self->private_impl.c_decode_huffman_slow[0].v_dmask = v_dmask;
self->private_impl.c_decode_huffman_slow[0].v_redir_top = v_redir_top;
self->private_impl.c_decode_huffman_slow[0].v_redir_mask = v_redir_mask;
self->private_impl.c_decode_huffman_slow[0].v_length = v_length;
self->private_impl.c_decode_huffman_slow[0].v_dist_minus_1 = v_dist_minus_1;
self->private_impl.c_decode_huffman_slow[0].v_hlen = v_hlen;
self->private_impl.c_decode_huffman_slow[0].v_hdist = v_hdist;
goto exit;
exit:
if (a_dst.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->data.ptr;
}
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader a_src);
static wuffs_base__status //
wuffs_lzw__decoder__write_to(wuffs_lzw__decoder* self,
wuffs_base__io_writer a_dst);
// ---------------- Initializer Implementations
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_lzw__decoder__check_wuffs_version(wuffs_lzw__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version) {
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 (self->private_impl.magic != 0) {
return wuffs_base__error__check_wuffs_version_not_applicable;
}
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__empty_struct){});
}
if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
return ((wuffs_base__empty_struct){});
}
if (a_lw < 2 || a_lw > 8) {
self->private_impl.magic = WUFFS_BASE__DISABLED;
return ((wuffs_base__empty_struct){});
}
self->private_impl.f_lw = a_lw;
return ((wuffs_base__empty_struct){});
}
// -------- 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_writer a_dst,
wuffs_base__io_reader 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__check_wuffs_version_missing;
}
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.c_decode_io_writer[0].coro_susp_point;
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_lw >= 2) {
self->private_impl.f_literal_width = self->private_impl.f_lw;
}
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_impl.f_lm1s[v_i] = 0;
self->private_impl.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.c_decode_io_writer[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_io_writer[0].coro_susp_point = coro_susp_point;
self->private_impl.active_coroutine = 1;
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_reader 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 = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
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)(io1_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__return_empty_struct());
v_n_bits |= 24;
} else if (((uint64_t)(io1_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__return_empty_struct());
v_n_bits += 8;
if (v_n_bits >= v_width) {
} else if (((uint64_t)(io1_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__return_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_impl.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_impl.f_lm1s[v_prev_code] + 1) & 4095);
self->private_impl.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_impl.f_suffixes[v_save_code],
self->private_impl.f_suffixes[v_prev_code],
sizeof(self->private_impl.f_suffixes[v_save_code]));
self->private_impl.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_impl.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_impl.f_lm1s[v_c])) & 4294967288)) &
8191);
v_output_wi =
((v_output_wi + 1 + ((uint32_t)(self->private_impl.f_lm1s[v_c]))) &
8191);
v_steps = (((uint32_t)(self->private_impl.f_lm1s[v_c])) >> 3);
while (true) {
memcpy((self->private_impl.f_output) + (v_o),
(self->private_impl.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_impl.f_suffixes[v_c][0];
if (v_code == v_save_code) {
self->private_impl.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_impl.f_lm1s[v_prev_code] + 1) & 4095);
self->private_impl.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_impl.f_suffixes[v_save_code],
self->private_impl.f_suffixes[v_prev_code],
sizeof(self->private_impl.f_suffixes[v_save_code]));
self->private_impl.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_impl.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 > io0_a_src) {
(iop_a_src--, wuffs_base__return_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.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
return ((wuffs_base__empty_struct){});
}
// -------- func lzw.decoder.write_to
static wuffs_base__status //
wuffs_lzw__decoder__write_to(wuffs_lzw__decoder* self,
wuffs_base__io_writer a_dst) {
wuffs_base__status status = NULL;
wuffs_base__slice_u8 v_s = {};
uint64_t v_n = 0;
uint8_t* iop_a_dst = NULL;
uint8_t* io0_a_dst = NULL;
uint8_t* io1_a_dst = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_dst);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_dst);
if (a_dst.private_impl.buf) {
iop_a_dst =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->meta.wi;
if (!a_dst.private_impl.mark) {
a_dst.private_impl.mark = iop_a_dst;
a_dst.private_impl.limit =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->data.len;
}
if (a_dst.private_impl.buf->meta.closed) {
a_dst.private_impl.limit = iop_a_dst;
}
io0_a_dst = a_dst.private_impl.mark;
io1_a_dst = a_dst.private_impl.limit;
}
uint32_t coro_susp_point = self->private_impl.c_write_to[0].coro_susp_point;
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__slice_u8){
.ptr = self->private_impl.f_output,
.len = 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, io1_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.c_write_to[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_write_to[0].coro_susp_point = coro_susp_point;
goto exit;
exit:
if (a_dst.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->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__slice_u8){});
}
if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
return ((wuffs_base__slice_u8){});
}
wuffs_base__slice_u8 v_s = {};
if (self->private_impl.f_output_ri <= self->private_impl.f_output_wi) {
v_s = wuffs_base__slice_u8__subslice_ij(
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_output,
.len = 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_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__not_enough_pixel_data =
"?gif: not enough pixel data";
const char* wuffs_gif__error__too_much_pixel_data = "?gif: too much pixel data";
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] = {
4294967295, 1, 2, 4, 0,
};
static const uint8_t wuffs_gif__interlace_delta[5] = {
1, 2, 4, 8, 8,
};
static const uint8_t wuffs_gif__animexts1dot0[11] = {
65, 78, 73, 77, 69, 88, 84, 83, 49, 46, 48,
};
static const uint8_t wuffs_gif__netscape2dot0[11] = {
78, 69, 84, 83, 67, 65, 80, 69, 50, 46, 48,
};
// ---------------- Private Initializer Prototypes
// ---------------- Private Function Prototypes
static wuffs_base__status //
wuffs_gif__decoder__skip_frame(wuffs_gif__decoder* self,
wuffs_base__io_reader 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_reader a_src);
static wuffs_base__status //
wuffs_gif__decoder__decode_header(wuffs_gif__decoder* self,
wuffs_base__io_reader a_src);
static wuffs_base__status //
wuffs_gif__decoder__decode_lsd(wuffs_gif__decoder* self,
wuffs_base__io_reader a_src);
static wuffs_base__status //
wuffs_gif__decoder__decode_extension(wuffs_gif__decoder* self,
wuffs_base__io_reader a_src);
static wuffs_base__status //
wuffs_gif__decoder__skip_blocks(wuffs_gif__decoder* self,
wuffs_base__io_reader a_src);
static wuffs_base__status //
wuffs_gif__decoder__decode_ae(wuffs_gif__decoder* self,
wuffs_base__io_reader a_src);
static wuffs_base__status //
wuffs_gif__decoder__decode_gc(wuffs_gif__decoder* self,
wuffs_base__io_reader a_src);
static wuffs_base__status //
wuffs_gif__decoder__decode_id_part0(wuffs_gif__decoder* self,
wuffs_base__io_reader 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_reader 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_reader 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__check_wuffs_version(wuffs_gif__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version) {
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 (self->private_impl.magic != 0) {
return wuffs_base__error__check_wuffs_version_not_applicable;
}
{
wuffs_base__status z = wuffs_lzw__decoder__check_wuffs_version(
&self->private_impl.f_lzw, sizeof(self->private_impl.f_lzw),
WUFFS_VERSION);
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.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_reader 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__check_wuffs_version_missing;
}
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.c_decode_image_config[0].coro_susp_point;
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;
}
(memset(&self->private_impl.f_dirty_y, 0,
sizeof((wuffs_base__range_ie_u32){})),
wuffs_base__return_empty_struct());
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;
}
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 &&
(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));
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 = 1;
goto ok;
ok:
self->private_impl.c_decode_image_config[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_image_config[0].coro_susp_point = coro_susp_point;
self->private_impl.active_coroutine = 1;
goto exit;
exit:
if (wuffs_base__status__is_error(status)) {
self->private_impl.magic = WUFFS_BASE__DISABLED;
}
return status;
}
// -------- 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) {
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) {
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) {
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__rect_ie_u32){});
}
if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
return ((wuffs_base__rect_ie_u32){});
}
return wuffs_base__utility__make_rect_ie_u32(
&self->private_impl.f_util, self->private_impl.f_frame_rect_x0,
wuffs_base__range_ie_u32__get_min_incl(&self->private_impl.f_dirty_y),
self->private_impl.f_frame_rect_x1,
wuffs_base__range_ie_u32__get_max_excl(&self->private_impl.f_dirty_y));
}
// -------- 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__range_ii_u64){});
}
if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
return ((wuffs_base__range_ii_u64){});
}
return wuffs_base__utility__make_range_ii_u64(
&self->private_impl.f_util, ((uint64_t)(self->private_impl.f_width)),
((uint64_t)(self->private_impl.f_width)));
}
// -------- 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__check_wuffs_version_missing;
}
if (self->private_impl.f_call_sequence == 0) {
return wuffs_base__error__bad_call_sequence;
}
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_reader 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__check_wuffs_version_missing;
}
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 v_blend = 0;
uint32_t coro_susp_point =
self->private_impl.c_decode_frame_config[0].coro_susp_point;
if (coro_susp_point) {
}
switch (coro_susp_point) {
WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;
if (!self->private_impl.f_end_of_data) {
if (self->private_impl.f_call_sequence == 0) {
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
status = wuffs_gif__decoder__decode_image_config(self, NULL, a_src);
if (status) {
goto suspend;
}
} else if (self->private_impl.f_call_sequence != 1) {
if (self->private_impl.f_call_sequence == 2) {
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
status = wuffs_gif__decoder__skip_frame(self, a_src);
if (status) {
goto suspend;
}
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
status = wuffs_gif__decoder__decode_up_to_id_part1(self, a_src);
if (status) {
goto suspend;
}
}
}
if (self->private_impl.f_end_of_data) {
status = wuffs_base__warning__end_of_data;
goto ok;
}
v_blend = 0;
if (!self->private_impl.f_gc_has_transparent_index) {
v_blend = 2;
}
if (a_dst != NULL) {
wuffs_base__frame_config__update(
a_dst,
wuffs_base__utility__make_rect_ie_u32(
&self->private_impl.f_util,
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)),
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);
}
wuffs_base__u64__sat_add_indirect(
&self->private_impl.f_num_decoded_frame_configs_value, 1);
self->private_impl.f_call_sequence = 2;
goto ok;
ok:
self->private_impl.c_decode_frame_config[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_frame_config[0].coro_susp_point = coro_susp_point;
self->private_impl.active_coroutine = 2;
goto exit;
exit:
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_reader a_src) {
wuffs_base__status status = NULL;
uint8_t v_flags = 0;
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point = self->private_impl.c_skip_frame[0].coro_susp_point;
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 == io1_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_impl.c_skip_frame[0].scratch =
(((uint32_t)(3)) << (1 + (v_flags & 7)));
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
if (self->private_impl.c_skip_frame[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_skip_frame[0].scratch -= io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_skip_frame[0].scratch;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src++;
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
status = wuffs_gif__decoder__skip_blocks(self, a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
}
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.c_skip_frame[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_skip_frame[0].coro_susp_point = coro_susp_point;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader 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__check_wuffs_version_missing;
}
if (!a_dst) {
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;
uint32_t coro_susp_point =
self->private_impl.c_decode_frame[0].coro_susp_point;
if (coro_susp_point) {
}
switch (coro_susp_point) {
WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;
if (self->private_impl.f_call_sequence != 2) {
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
status = wuffs_gif__decoder__decode_frame_config(self, NULL, a_src);
if (status) {
goto suspend;
}
}
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.c_decode_frame[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_frame[0].coro_susp_point = coro_susp_point;
self->private_impl.active_coroutine = 3;
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 = 3;
self->private_impl.f_seen_graphic_control = false;
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__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_reader a_src) {
wuffs_base__status status = NULL;
uint8_t v_block_type = 0;
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_up_to_id_part1[0].coro_susp_point;
if (coro_susp_point) {
}
switch (coro_susp_point) {
WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;
if (!self->private_impl.f_restarted) {
self->private_impl.f_frame_config_io_position =
(a_src.private_impl.buf
? wuffs_base__u64__sat_add(
a_src.private_impl.buf->meta.pos,
iop_a_src - a_src.private_impl.buf->data.ptr)
: 0);
} else if (self->private_impl.f_frame_config_io_position !=
(a_src.private_impl.buf
? wuffs_base__u64__sat_add(
a_src.private_impl.buf->meta.pos,
iop_a_src - a_src.private_impl.buf->data.ptr)
: 0)) {
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 == io1_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.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
status = wuffs_gif__decoder__decode_extension(self, a_src);
if (a_src.private_impl.buf) {
iop_a_src = a_src.private_impl.buf->data.ptr +
a_src.private_impl.buf->meta.ri;
}
if (status) {
goto suspend;
}
} else if (v_block_type == 44) {
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
status = wuffs_gif__decoder__decode_id_part0(self, a_src);
if (a_src.private_impl.buf) {
iop_a_src = a_src.private_impl.buf->data.ptr +
a_src.private_impl.buf->meta.ri;
}
if (status) {
goto suspend;
}
goto label_0_break;
} else if (v_block_type == 59) {
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.c_decode_up_to_id_part1[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_up_to_id_part1[0].coro_susp_point =
coro_susp_point;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader a_src) {
wuffs_base__status status = NULL;
uint8_t v_c[6] = {};
uint32_t v_i = 0;
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_header[0].coro_susp_point;
if (coro_susp_point) {
memcpy(v_c, self->private_impl.c_decode_header[0].v_c, sizeof(v_c));
v_i = self->private_impl.c_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 == io1_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.c_decode_header[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_header[0].coro_susp_point = coro_susp_point;
memcpy(self->private_impl.c_decode_header[0].v_c, v_c, sizeof(v_c));
self->private_impl.c_decode_header[0].v_i = v_i;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader a_src) {
wuffs_base__status status = NULL;
uint8_t v_flags = 0;
uint32_t v_num_palette_entries = 0;
uint32_t v_i = 0;
uint32_t v_argb = 0;
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point = self->private_impl.c_decode_lsd[0].coro_susp_point;
if (coro_susp_point) {
v_flags = self->private_impl.c_decode_lsd[0].v_flags;
v_num_palette_entries =
self->private_impl.c_decode_lsd[0].v_num_palette_entries;
v_i = self->private_impl.c_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(io1_a_src - iop_a_src >= 2)) {
t_0 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src)));
iop_a_src += 2;
} else {
self->private_impl.c_decode_lsd[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_lsd[0].scratch;
uint32_t num_bits_0 = *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(io1_a_src - iop_a_src >= 2)) {
t_1 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src)));
iop_a_src += 2;
} else {
self->private_impl.c_decode_lsd[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_lsd[0].scratch;
uint32_t num_bits_1 = *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 == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint8_t t_2 = *iop_a_src++;
v_flags = t_2;
}
self->private_impl.c_decode_lsd[0].scratch = 2;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
if (self->private_impl.c_decode_lsd[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_decode_lsd[0].scratch -= io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_decode_lsd[0].scratch;
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(7);
uint32_t t_3;
if (WUFFS_BASE__LIKELY(io1_a_src - iop_a_src >= 3)) {
t_3 = ((uint32_t)(wuffs_base__load_u24be(iop_a_src)));
iop_a_src += 3;
} else {
self->private_impl.c_decode_lsd[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_lsd[0].scratch;
uint32_t num_bits_3 = *scratch & 0xFF;
*scratch >>= 8;
*scratch <<= 8;
*scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_3);
if (num_bits_3 == 16) {
t_3 = ((uint32_t)(*scratch >> 40));
break;
}
num_bits_3 += 8;
*scratch |= ((uint64_t)(num_bits_3));
}
}
v_argb = t_3;
}
v_argb |= 4278190080;
self->private_impl.f_palettes[0][((4 * v_i) + 0)] =
((uint8_t)(((v_argb >> 0) & 255)));
self->private_impl.f_palettes[0][((4 * v_i) + 1)] =
((uint8_t)(((v_argb >> 8) & 255)));
self->private_impl.f_palettes[0][((4 * v_i) + 2)] =
((uint8_t)(((v_argb >> 16) & 255)));
self->private_impl.f_palettes[0][((4 * v_i) + 3)] =
((uint8_t)(((v_argb >> 24) & 255)));
v_i += 1;
}
while (v_i < 256) {
self->private_impl.f_palettes[0][((4 * v_i) + 0)] = 0;
self->private_impl.f_palettes[0][((4 * v_i) + 1)] = 0;
self->private_impl.f_palettes[0][((4 * v_i) + 2)] = 0;
self->private_impl.f_palettes[0][((4 * v_i) + 3)] = 255;
v_i += 1;
}
}
goto ok;
ok:
self->private_impl.c_decode_lsd[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_lsd[0].coro_susp_point = coro_susp_point;
self->private_impl.c_decode_lsd[0].v_flags = v_flags;
self->private_impl.c_decode_lsd[0].v_num_palette_entries =
v_num_palette_entries;
self->private_impl.c_decode_lsd[0].v_i = v_i;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader a_src) {
wuffs_base__status status = NULL;
uint8_t v_label = 0;
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_extension[0].coro_susp_point;
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 == io1_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.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
status = wuffs_gif__decoder__decode_gc(self, a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
}
if (status) {
goto suspend;
}
status = NULL;
goto ok;
} else if (v_label == 255) {
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
status = wuffs_gif__decoder__decode_ae(self, a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
}
if (status) {
goto suspend;
}
status = NULL;
goto ok;
}
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
status = wuffs_gif__decoder__skip_blocks(self, a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
}
if (status) {
goto suspend;
}
goto ok;
ok:
self->private_impl.c_decode_extension[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_extension[0].coro_susp_point = coro_susp_point;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader a_src) {
wuffs_base__status status = NULL;
uint8_t v_block_size = 0;
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_skip_blocks[0].coro_susp_point;
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 == io1_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_impl.c_skip_blocks[0].scratch = ((uint32_t)(v_block_size));
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
if (self->private_impl.c_skip_blocks[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_skip_blocks[0].scratch -= io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_skip_blocks[0].scratch;
}
goto ok;
ok:
self->private_impl.c_skip_blocks[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_skip_blocks[0].coro_susp_point = coro_susp_point;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader a_src) {
wuffs_base__status status = NULL;
uint8_t v_c = 0;
uint8_t v_block_size = 0;
bool v_not_animexts = false;
bool v_not_netscape = false;
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point = self->private_impl.c_decode_ae[0].coro_susp_point;
if (coro_susp_point) {
v_block_size = self->private_impl.c_decode_ae[0].v_block_size;
v_not_animexts = self->private_impl.c_decode_ae[0].v_not_animexts;
v_not_netscape = self->private_impl.c_decode_ae[0].v_not_netscape;
}
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 == io1_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_impl.c_decode_ae[0].scratch = ((uint32_t)(v_block_size));
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
if (self->private_impl.c_decode_ae[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_decode_ae[0].scratch -= io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_decode_ae[0].scratch;
goto label_0_break;
}
v_not_animexts = false;
v_not_netscape = false;
v_block_size = 0;
while (v_block_size < 11) {
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint8_t t_1 = *iop_a_src++;
v_c = t_1;
}
v_not_animexts =
(v_not_animexts || (v_c != wuffs_gif__animexts1dot0[v_block_size]));
v_not_netscape =
(v_not_netscape || (v_c != wuffs_gif__netscape2dot0[v_block_size]));
v_block_size += 1;
}
if (v_not_animexts && v_not_netscape) {
goto label_0_break;
}
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_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_impl.c_decode_ae[0].scratch = ((uint32_t)(v_block_size));
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
if (self->private_impl.c_decode_ae[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_decode_ae[0].scratch -= io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_decode_ae[0].scratch;
goto label_0_break;
}
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_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_impl.c_decode_ae[0].scratch = 2;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
if (self->private_impl.c_decode_ae[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_decode_ae[0].scratch -= io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_decode_ae[0].scratch;
goto label_0_break;
}
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
uint32_t t_4;
if (WUFFS_BASE__LIKELY(io1_a_src - iop_a_src >= 2)) {
t_4 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src)));
iop_a_src += 2;
} else {
self->private_impl.c_decode_ae[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_ae[0].scratch;
uint32_t num_bits_4 = *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;
}
goto label_0_break;
}
label_0_break:;
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10);
status = wuffs_gif__decoder__skip_blocks(self, a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
}
if (status) {
goto suspend;
}
goto ok;
ok:
self->private_impl.c_decode_ae[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_ae[0].coro_susp_point = coro_susp_point;
self->private_impl.c_decode_ae[0].v_block_size = v_block_size;
self->private_impl.c_decode_ae[0].v_not_animexts = v_not_animexts;
self->private_impl.c_decode_ae[0].v_not_netscape = v_not_netscape;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader 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 = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point = self->private_impl.c_decode_gc[0].coro_susp_point;
if (coro_susp_point) {
}
switch (coro_susp_point) {
WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;
if (self->private_impl.f_seen_graphic_control) {
status = wuffs_gif__error__bad_graphic_control;
goto exit;
}
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_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 == io1_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(io1_a_src - iop_a_src >= 2)) {
t_2 = wuffs_base__load_u16le(iop_a_src);
iop_a_src += 2;
} else {
self->private_impl.c_decode_gc[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_gc[0].scratch;
uint32_t num_bits_2 = *scratch >> 56;
*scratch <<= 8;
*scratch >>= 8;
*scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2;
if (num_bits_2 == 8) {
t_2 = *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 == io1_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 == io1_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;
}
self->private_impl.f_seen_graphic_control = true;
goto ok;
ok:
self->private_impl.c_decode_gc[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_gc[0].coro_susp_point = coro_susp_point;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader a_src) {
wuffs_base__status status = NULL;
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_id_part0[0].coro_susp_point;
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(io1_a_src - iop_a_src >= 2)) {
t_0 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src)));
iop_a_src += 2;
} else {
self->private_impl.c_decode_id_part0[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_id_part0[0].scratch;
uint32_t num_bits_0 = *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(io1_a_src - iop_a_src >= 2)) {
t_1 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src)));
iop_a_src += 2;
} else {
self->private_impl.c_decode_id_part0[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_id_part0[0].scratch;
uint32_t num_bits_1 = *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(io1_a_src - iop_a_src >= 2)) {
t_2 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src)));
iop_a_src += 2;
} else {
self->private_impl.c_decode_id_part0[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_id_part0[0].scratch;
uint32_t num_bits_2 = *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(io1_a_src - iop_a_src >= 2)) {
t_3 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src)));
iop_a_src += 2;
} else {
self->private_impl.c_decode_id_part0[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_id_part0[0].scratch;
uint32_t num_bits_3 = *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_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.c_decode_id_part0[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_id_part0[0].coro_susp_point = coro_susp_point;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader a_src) {
wuffs_base__status status = NULL;
uint8_t v_flags = 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 = {};
uint8_t v_lw = 0;
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_id_part1[0].coro_susp_point;
if (coro_susp_point) {
v_num_palette_entries =
self->private_impl.c_decode_id_part1[0].v_num_palette_entries;
v_i = self->private_impl.c_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 == io1_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;
}
self->private_impl.f_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(io1_a_src - iop_a_src >= 3)) {
t_1 = ((uint32_t)(wuffs_base__load_u24be(iop_a_src)));
iop_a_src += 3;
} else {
self->private_impl.c_decode_id_part1[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch =
&self->private_impl.c_decode_id_part1[0].scratch;
uint32_t num_bits_1 = *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_impl.f_palettes[1][((4 * v_i) + 0)] =
((uint8_t)(((v_argb >> 0) & 255)));
self->private_impl.f_palettes[1][((4 * v_i) + 1)] =
((uint8_t)(((v_argb >> 8) & 255)));
self->private_impl.f_palettes[1][((4 * v_i) + 2)] =
((uint8_t)(((v_argb >> 16) & 255)));
self->private_impl.f_palettes[1][((4 * v_i) + 3)] =
((uint8_t)(((v_argb >> 24) & 255)));
v_i += 1;
}
while (v_i < 256) {
self->private_impl.f_palettes[1][((4 * v_i) + 0)] = 0;
self->private_impl.f_palettes[1][((4 * v_i) + 1)] = 0;
self->private_impl.f_palettes[1][((4 * v_i) + 2)] = 0;
self->private_impl.f_palettes[1][((4 * v_i) + 3)] = 255;
v_i += 1;
}
} else if (self->private_impl.f_gc_has_transparent_index) {
wuffs_base__slice_u8__copy_from_slice(
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_palettes[1],
.len = 1024,
}),
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_palettes[0],
.len = 1024,
}));
} else {
self->private_impl.f_which_palette = 0;
}
if (self->private_impl.f_gc_has_transparent_index) {
self->private_impl.f_palettes[1][(
(4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 0)] =
0;
self->private_impl.f_palettes[1][(
(4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 1)] =
0;
self->private_impl.f_palettes[1][(
(4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 2)] =
0;
self->private_impl.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__slice_u8){
.ptr = self->private_impl.f_dst_palette,
.len = 1024,
});
}
wuffs_base__pixel_swizzler__prepare(
&self->private_impl.f_swizzler,
wuffs_base__pixel_buffer__pixel_format(a_dst), v_dst_palette,
1191444488,
((wuffs_base__slice_u8){
.ptr = self->private_impl
.f_palettes[self->private_impl.f_which_palette],
.len = 1024,
}));
if (self->private_impl.f_previous_lzw_decode_ended_abruptly) {
(memset(&self->private_impl.f_lzw, 0, sizeof((wuffs_lzw__decoder){})),
wuffs_base__ignore_check_wuffs_version_status(
wuffs_lzw__decoder__check_wuffs_version(
&self->private_impl.f_lzw, sizeof((wuffs_lzw__decoder){}),
WUFFS_VERSION)),
wuffs_base__return_empty_struct());
}
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint8_t t_2 = *iop_a_src++;
v_lw = t_2;
}
if ((v_lw < 2) || (8 < v_lw)) {
status = wuffs_gif__error__bad_literal_width;
goto exit;
}
wuffs_lzw__decoder__set_literal_width(&self->private_impl.f_lzw,
((uint32_t)(v_lw)));
self->private_impl.f_previous_lzw_decode_ended_abruptly = true;
goto ok;
ok:
self->private_impl.c_decode_id_part1[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_id_part1[0].coro_susp_point = coro_susp_point;
self->private_impl.c_decode_id_part1[0].v_num_palette_entries =
v_num_palette_entries;
self->private_impl.c_decode_id_part1[0].v_i = v_i;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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_reader 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 = {};
wuffs_base__io_reader v_r = {};
wuffs_base__io_buffer u_r = {};
uint8_t* iop_v_r = NULL;
uint8_t* io1_v_r = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(u_r);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(iop_v_r);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_v_r);
wuffs_base__status v_lzw_status = NULL;
wuffs_base__status v_copy_status = NULL;
wuffs_base__slice_u8 v_uncompressed = {};
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_id_part2[0].coro_susp_point;
if (coro_susp_point) {
v_block_size = self->private_impl.c_decode_id_part2[0].v_block_size;
v_need_block_size =
self->private_impl.c_decode_id_part2[0].v_need_block_size;
v_lzw_status = self->private_impl.c_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 == io1_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)(io1_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)(io1_a_src - iop_a_src)));
if (v_n_compressed <= 0) {
goto label_1_break;
}
v_compressed =
wuffs_base__io_reader__take(&iop_a_src, io1_a_src, v_n_compressed);
wuffs_base__slice_u8__copy_from_slice(
wuffs_base__slice_u8__subslice_i(
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_compressed,
.len = 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)(io1_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__return_empty_struct());
}
label_1_break:;
if (((uint64_t)(self->private_impl.f_width)) <
((uint64_t)(a_workbuf.len))) {
a_workbuf = wuffs_base__slice_u8__subslice_j(
a_workbuf, ((uint64_t)(self->private_impl.f_width)));
} else if (((uint64_t)(self->private_impl.f_width)) >
((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_reader o_0_v_r = v_r;
uint8_t* o_0_iop_v_r = iop_v_r;
uint8_t* o_0_io1_v_r = io1_v_r;
wuffs_base__io_reader__set(
&v_r, &u_r, &iop_v_r, &io1_v_r,
wuffs_base__slice_u8__subslice_ij(
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_compressed,
.len = 4096,
}),
self->private_impl.f_compressed_ri,
self->private_impl.f_compressed_wi));
{
u_r.meta.ri = iop_v_r - u_r.data.ptr;
wuffs_base__status t_1 = wuffs_lzw__decoder__decode_io_writer(
&self->private_impl.f_lzw,
wuffs_base__utility__null_io_writer(&self->private_impl.f_util),
v_r);
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,
((uint64_t)(iop_v_r - v_r.private_impl.mark)));
v_r = o_0_v_r;
iop_v_r = o_0_iop_v_r;
io1_v_r = o_0_io1_v_r;
}
v_uncompressed = wuffs_lzw__decoder__flush(&self->private_impl.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_impl.c_decode_id_part2[0].scratch =
((uint32_t)(v_block_size));
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3);
if (self->private_impl.c_decode_id_part2[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_decode_id_part2[0].scratch -=
io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_decode_id_part2[0].scratch;
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
status = wuffs_gif__decoder__skip_blocks(self, a_src);
if (a_src.private_impl.buf) {
iop_a_src = a_src.private_impl.buf->data.ptr +
a_src.private_impl.buf->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;
goto ok;
ok:
self->private_impl.c_decode_id_part2[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_id_part2[0].coro_susp_point = coro_susp_point;
self->private_impl.c_decode_id_part2[0].v_block_size = v_block_size;
self->private_impl.c_decode_id_part2[0].v_need_block_size = v_need_block_size;
self->private_impl.c_decode_id_part2[0].v_lzw_status = v_lzw_status;
goto exit;
exit:
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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 = {};
wuffs_base__slice_u8 v_src = {};
uint64_t v_n = 0;
uint64_t v_src_ri = 0;
uint32_t v_bytes_per_pixel = 0;
uint32_t v_pixfmt = 0;
wuffs_base__table_u8 v_tab = {};
uint64_t v_i = 0;
uint64_t v_j = 0;
v_bytes_per_pixel = 1;
v_pixfmt = wuffs_base__pixel_buffer__pixel_format(a_pb);
if ((v_pixfmt == 1157662856) || (v_pixfmt == 1426098312) ||
(v_pixfmt == 1174440072) || (v_pixfmt == 1442875528) ||
(v_pixfmt == 1191217288) || (v_pixfmt == 1459652744)) {
v_bytes_per_pixel = 4;
}
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) {
return wuffs_gif__error__too_much_pixel_data;
}
v_dst = wuffs_base__table_u8__row(v_tab, self->private_impl.f_dst_y);
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_packed(
&self->private_impl.f_swizzler, v_dst,
((wuffs_base__slice_u8){
.ptr = self->private_impl.f_dst_palette,
.len = 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_y = wuffs_base__range_ie_u32__unite(
&self->private_impl.f_dirty_y,
wuffs_base__utility__make_range_ie_u32(
&self->private_impl.f_util, self->private_impl.f_dst_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;
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)) {
self->private_impl.f_interlace -= 1;
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)) {
self->private_impl.f_interlace -= 1;
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__check_wuffs_version(wuffs_gzip__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version) {
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 (self->private_impl.magic != 0) {
return wuffs_base__error__check_wuffs_version_not_applicable;
}
{
wuffs_base__status z = wuffs_deflate__decoder__check_wuffs_version(
&self->private_impl.f_flate, sizeof(self->private_impl.f_flate),
WUFFS_VERSION);
if (z) {
return z;
}
}
{
wuffs_base__status z = wuffs_crc32__ieee_hasher__check_wuffs_version(
&self->private_impl.f_checksum, sizeof(self->private_impl.f_checksum),
WUFFS_VERSION);
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__empty_struct){});
}
if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
return ((wuffs_base__empty_struct){});
}
self->private_impl.f_ignore_checksum = a_ic;
return ((wuffs_base__empty_struct){});
}
// -------- 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_writer a_dst,
wuffs_base__io_reader 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__check_wuffs_version_missing;
}
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;
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 = NULL;
uint8_t* io1_a_dst = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_dst);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_dst);
if (a_dst.private_impl.buf) {
iop_a_dst =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->meta.wi;
if (!a_dst.private_impl.mark) {
a_dst.private_impl.mark = iop_a_dst;
a_dst.private_impl.limit =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->data.len;
}
if (a_dst.private_impl.buf->meta.closed) {
a_dst.private_impl.limit = iop_a_dst;
}
io0_a_dst = a_dst.private_impl.mark;
io1_a_dst = a_dst.private_impl.limit;
}
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_io_writer[0].coro_susp_point;
if (coro_susp_point) {
v_flags = self->private_impl.c_decode_io_writer[0].v_flags;
v_checksum_got = self->private_impl.c_decode_io_writer[0].v_checksum_got;
v_decoded_length_got =
self->private_impl.c_decode_io_writer[0].v_decoded_length_got;
v_checksum_want = self->private_impl.c_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 == io1_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 == io1_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 == io1_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 == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint8_t t_3 = *iop_a_src++;
v_flags = t_3;
}
self->private_impl.c_decode_io_writer[0].scratch = 6;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
if (self->private_impl.c_decode_io_writer[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_decode_io_writer[0].scratch -= io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_decode_io_writer[0].scratch;
if ((v_flags & 4) != 0) {
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6);
uint16_t t_4;
if (WUFFS_BASE__LIKELY(io1_a_src - iop_a_src >= 2)) {
t_4 = wuffs_base__load_u16le(iop_a_src);
iop_a_src += 2;
} else {
self->private_impl.c_decode_io_writer[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch =
&self->private_impl.c_decode_io_writer[0].scratch;
uint32_t num_bits_4 = *scratch >> 56;
*scratch <<= 8;
*scratch >>= 8;
*scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4;
if (num_bits_4 == 8) {
t_4 = *scratch;
break;
}
num_bits_4 += 8;
*scratch |= ((uint64_t)(num_bits_4)) << 56;
}
}
v_xlen = t_4;
}
self->private_impl.c_decode_io_writer[0].scratch = ((uint32_t)(v_xlen));
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8);
if (self->private_impl.c_decode_io_writer[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_decode_io_writer[0].scratch -=
io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_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 == io1_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 == io1_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_impl.c_decode_io_writer[0].scratch = 2;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11);
if (self->private_impl.c_decode_io_writer[0].scratch >
((uint64_t)(io1_a_src - iop_a_src))) {
self->private_impl.c_decode_io_writer[0].scratch -=
io1_a_src - iop_a_src;
iop_a_src = io1_a_src;
status = wuffs_base__suspension__short_read;
goto suspend;
}
iop_a_src += self->private_impl.c_decode_io_writer[0].scratch;
}
if ((v_flags & 224) != 0) {
status = wuffs_gzip__error__bad_encoding_flags;
goto exit;
}
while (true) {
wuffs_base__io_writer__set_mark(&a_dst, iop_a_dst);
{
if (a_dst.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->data.ptr;
}
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
wuffs_base__status t_7 = wuffs_deflate__decoder__decode_io_writer(
&self->private_impl.f_flate, a_dst, a_src);
if (a_dst.private_impl.buf) {
iop_a_dst = a_dst.private_impl.buf->data.ptr +
a_dst.private_impl.buf->meta.wi;
}
if (a_src.private_impl.buf) {
iop_a_src = a_src.private_impl.buf->data.ptr +
a_src.private_impl.buf->meta.ri;
}
v_status = t_7;
}
if (!self->private_impl.f_ignore_checksum) {
v_checksum_got = wuffs_crc32__ieee_hasher__update(
&self->private_impl.f_checksum,
((wuffs_base__slice_u8){
.ptr = a_dst.private_impl.mark,
.len = (size_t)(iop_a_dst - a_dst.private_impl.mark),
}));
v_decoded_length_got += ((uint32_t)(
(((uint64_t)(iop_a_dst - a_dst.private_impl.mark)) & 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(io1_a_src - iop_a_src >= 4)) {
t_8 = wuffs_base__load_u32le(iop_a_src);
iop_a_src += 4;
} else {
self->private_impl.c_decode_io_writer[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_io_writer[0].scratch;
uint32_t num_bits_8 = *scratch >> 56;
*scratch <<= 8;
*scratch >>= 8;
*scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_8;
if (num_bits_8 == 24) {
t_8 = *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(io1_a_src - iop_a_src >= 4)) {
t_9 = wuffs_base__load_u32le(iop_a_src);
iop_a_src += 4;
} else {
self->private_impl.c_decode_io_writer[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_io_writer[0].scratch;
uint32_t num_bits_9 = *scratch >> 56;
*scratch <<= 8;
*scratch >>= 8;
*scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_9;
if (num_bits_9 == 24) {
t_9 = *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.c_decode_io_writer[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_io_writer[0].coro_susp_point = coro_susp_point;
self->private_impl.active_coroutine = 1;
self->private_impl.c_decode_io_writer[0].v_flags = v_flags;
self->private_impl.c_decode_io_writer[0].v_checksum_got = v_checksum_got;
self->private_impl.c_decode_io_writer[0].v_decoded_length_got =
v_decoded_length_got;
self->private_impl.c_decode_io_writer[0].v_checksum_want = v_checksum_want;
goto exit;
exit:
if (a_dst.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->data.ptr;
}
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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__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__todo_unsupported_preset_dictionary =
"?zlib: TODO: unsupported preset dictionary";
// ---------------- Private Consts
// ---------------- Private Initializer Prototypes
// ---------------- Private Function Prototypes
// ---------------- Initializer Implementations
wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT //
wuffs_zlib__decoder__check_wuffs_version(wuffs_zlib__decoder* self,
size_t sizeof_star_self,
uint64_t wuffs_version) {
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 (self->private_impl.magic != 0) {
return wuffs_base__error__check_wuffs_version_not_applicable;
}
{
wuffs_base__status z = wuffs_deflate__decoder__check_wuffs_version(
&self->private_impl.f_flate, sizeof(self->private_impl.f_flate),
WUFFS_VERSION);
if (z) {
return z;
}
}
{
wuffs_base__status z = wuffs_adler32__hasher__check_wuffs_version(
&self->private_impl.f_checksum, sizeof(self->private_impl.f_checksum),
WUFFS_VERSION);
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.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__empty_struct){});
}
if (self->private_impl.magic != WUFFS_BASE__MAGIC) {
return ((wuffs_base__empty_struct){});
}
self->private_impl.f_ignore_checksum = a_ic;
return ((wuffs_base__empty_struct){});
}
// -------- 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_writer a_dst,
wuffs_base__io_reader 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__check_wuffs_version_missing;
}
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;
uint8_t* iop_a_dst = NULL;
uint8_t* io0_a_dst = NULL;
uint8_t* io1_a_dst = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_dst);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_dst);
if (a_dst.private_impl.buf) {
iop_a_dst =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->meta.wi;
if (!a_dst.private_impl.mark) {
a_dst.private_impl.mark = iop_a_dst;
a_dst.private_impl.limit =
a_dst.private_impl.buf->data.ptr + a_dst.private_impl.buf->data.len;
}
if (a_dst.private_impl.buf->meta.closed) {
a_dst.private_impl.limit = iop_a_dst;
}
io0_a_dst = a_dst.private_impl.mark;
io1_a_dst = a_dst.private_impl.limit;
}
uint8_t* iop_a_src = NULL;
uint8_t* io0_a_src = NULL;
uint8_t* io1_a_src = NULL;
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io0_a_src);
WUFFS_BASE__IGNORE_POTENTIALLY_UNUSED_VARIABLE(io1_a_src);
if (a_src.private_impl.buf) {
iop_a_src =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.ri;
if (!a_src.private_impl.mark) {
a_src.private_impl.mark = iop_a_src;
a_src.private_impl.limit =
a_src.private_impl.buf->data.ptr + a_src.private_impl.buf->meta.wi;
}
io0_a_src = a_src.private_impl.mark;
io1_a_src = a_src.private_impl.limit;
}
uint32_t coro_susp_point =
self->private_impl.c_decode_io_writer[0].coro_susp_point;
if (coro_susp_point) {
v_checksum_got = self->private_impl.c_decode_io_writer[0].v_checksum_got;
}
switch (coro_susp_point) {
WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0;
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1);
uint16_t t_0;
if (WUFFS_BASE__LIKELY(io1_a_src - iop_a_src >= 2)) {
t_0 = wuffs_base__load_u16be(iop_a_src);
iop_a_src += 2;
} else {
self->private_impl.c_decode_io_writer[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_io_writer[0].scratch;
uint32_t num_bits_0 = *scratch & 0xFF;
*scratch >>= 8;
*scratch <<= 8;
*scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0);
if (num_bits_0 == 8) {
t_0 = *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 & 32) != 0) {
status = wuffs_zlib__error__todo_unsupported_preset_dictionary;
goto exit;
}
if ((v_x % 31) != 0) {
status = wuffs_zlib__error__bad_parity_check;
goto exit;
}
while (true) {
wuffs_base__io_writer__set_mark(&a_dst, iop_a_dst);
{
if (a_dst.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->data.ptr;
}
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->data.ptr;
}
wuffs_base__status t_1 = wuffs_deflate__decoder__decode_io_writer(
&self->private_impl.f_flate, a_dst, a_src);
if (a_dst.private_impl.buf) {
iop_a_dst = a_dst.private_impl.buf->data.ptr +
a_dst.private_impl.buf->meta.wi;
}
if (a_src.private_impl.buf) {
iop_a_src = a_src.private_impl.buf->data.ptr +
a_src.private_impl.buf->meta.ri;
}
v_status = t_1;
}
if (!self->private_impl.f_ignore_checksum) {
v_checksum_got = wuffs_adler32__hasher__update(
&self->private_impl.f_checksum,
((wuffs_base__slice_u8){
.ptr = a_dst.private_impl.mark,
.len = (size_t)(iop_a_dst - a_dst.private_impl.mark),
}));
}
if (wuffs_base__status__is_ok(v_status)) {
goto label_0_break;
}
status = v_status;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3);
}
label_0_break:;
{
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4);
uint32_t t_2;
if (WUFFS_BASE__LIKELY(io1_a_src - iop_a_src >= 4)) {
t_2 = wuffs_base__load_u32be(iop_a_src);
iop_a_src += 4;
} else {
self->private_impl.c_decode_io_writer[0].scratch = 0;
WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5);
while (true) {
if (WUFFS_BASE__UNLIKELY(iop_a_src == io1_a_src)) {
status = wuffs_base__suspension__short_read;
goto suspend;
}
uint64_t* scratch = &self->private_impl.c_decode_io_writer[0].scratch;
uint32_t num_bits_2 = *scratch & 0xFF;
*scratch >>= 8;
*scratch <<= 8;
*scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_2);
if (num_bits_2 == 24) {
t_2 = *scratch >> 32;
break;
}
num_bits_2 += 8;
*scratch |= ((uint64_t)(num_bits_2));
}
}
v_checksum_want = t_2;
}
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.c_decode_io_writer[0].coro_susp_point = 0;
goto exit;
}
goto suspend;
suspend:
self->private_impl.c_decode_io_writer[0].coro_susp_point = coro_susp_point;
self->private_impl.active_coroutine = 1;
self->private_impl.c_decode_io_writer[0].v_checksum_got = v_checksum_got;
goto exit;
exit:
if (a_dst.private_impl.buf) {
a_dst.private_impl.buf->meta.wi =
iop_a_dst - a_dst.private_impl.buf->data.ptr;
}
if (a_src.private_impl.buf) {
a_src.private_impl.buf->meta.ri =
iop_a_src - a_src.private_impl.buf->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