| #ifndef WUFFS_INCLUDE_GUARD |
| #define WUFFS_INCLUDE_GUARD |
| |
| // Wuffs ships as a "single file C library" or "header file library" as per |
| // https://github.com/nothings/stb/blob/master/docs/stb_howto.txt |
| // |
| // To use that single file as a "foo.c"-like implementation, instead of a |
| // "foo.h"-like header, #define WUFFS_IMPLEMENTATION before #include'ing or |
| // compiling it. |
| |
| // Copyright 2017 The Wuffs Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| // GCC does not warn for unused *static inline* functions, but clang does. |
| #ifdef __clang__ |
| #pragma clang diagnostic push |
| #pragma clang diagnostic ignored "-Wunused-function" |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| // Wuffs assumes that: |
| // - converting a uint32_t to a size_t will never overflow. |
| // - converting a size_t to a uint64_t will never overflow. |
| #ifdef __WORDSIZE |
| #if (__WORDSIZE != 32) && (__WORDSIZE != 64) |
| #error "Wuffs requires a word size of either 32 or 64 bits" |
| #endif |
| #endif |
| |
| // WUFFS_VERSION is the major.minor.patch version, as per https://semver.org/, |
| // as a uint64_t. The major number is the high 32 bits. The minor number is the |
| // middle 16 bits. The patch number is the low 16 bits. The pre-release label |
| // and build metadata are part of the string representation (such as |
| // "1.2.3-beta+456.20181231") but not the uint64_t representation. |
| // |
| // WUFFS_VERSION_PRE_RELEASE_LABEL (such as "", "beta" or "rc.1") being |
| // non-empty denotes a developer preview, not a release version, and has no |
| // backwards or forwards compatibility guarantees. |
| // |
| // WUFFS_VERSION_BUILD_METADATA_XXX, if non-zero, are the number of commits and |
| // the last commit date in the repository used to build this library. Within |
| // each major.minor branch, the commit count should increase monotonically. |
| // |
| // WUFFS_VERSION was overridden by "wuffs gen -version" based on revision |
| // b36c9f019f2908639b0bb4dd5b8337bb3daf3271 committed on 2019-12-19. |
| #define WUFFS_VERSION ((uint64_t)0x0000000000020000) |
| #define WUFFS_VERSION_MAJOR ((uint64_t)0x00000000) |
| #define WUFFS_VERSION_MINOR ((uint64_t)0x0002) |
| #define WUFFS_VERSION_PATCH ((uint64_t)0x0000) |
| #define WUFFS_VERSION_PRE_RELEASE_LABEL "" |
| #define WUFFS_VERSION_BUILD_METADATA_COMMIT_COUNT 2078 |
| #define WUFFS_VERSION_BUILD_METADATA_COMMIT_DATE 20191219 |
| #define WUFFS_VERSION_STRING "0.2.0+2078.20191219" |
| |
| // Define WUFFS_CONFIG__STATIC_FUNCTIONS to make all of Wuffs' functions have |
| // static storage. The motivation is discussed in the "ALLOW STATIC |
| // IMPLEMENTATION" section of |
| // https://raw.githubusercontent.com/nothings/stb/master/docs/stb_howto.txt |
| #ifdef WUFFS_CONFIG__STATIC_FUNCTIONS |
| #define WUFFS_BASE__MAYBE_STATIC static |
| #else |
| #define WUFFS_BASE__MAYBE_STATIC |
| #endif |
| |
| #if defined(__clang__) |
| #define WUFFS_BASE__POTENTIALLY_UNUSED_FIELD __attribute__((unused)) |
| #else |
| #define WUFFS_BASE__POTENTIALLY_UNUSED_FIELD |
| #endif |
| |
| // Clang also defines "__GNUC__". |
| #if defined(__GNUC__) |
| #define WUFFS_BASE__POTENTIALLY_UNUSED __attribute__((unused)) |
| #define WUFFS_BASE__WARN_UNUSED_RESULT __attribute__((warn_unused_result)) |
| #else |
| #define WUFFS_BASE__POTENTIALLY_UNUSED |
| #define WUFFS_BASE__WARN_UNUSED_RESULT |
| #endif |
| |
| // Flags for wuffs_foo__bar__initialize functions. |
| |
| #define WUFFS_INITIALIZE__DEFAULT_OPTIONS ((uint32_t)0x00000000) |
| |
| // WUFFS_INITIALIZE__ALREADY_ZEROED means that the "self" receiver struct value |
| // has already been set to all zeroes. |
| #define WUFFS_INITIALIZE__ALREADY_ZEROED ((uint32_t)0x00000001) |
| |
| // WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED means that, absent |
| // WUFFS_INITIALIZE__ALREADY_ZEROED, only some of the "self" receiver struct |
| // value will be set to all zeroes. Internal buffers, which tend to be a large |
| // proportion of the struct's size, will be left uninitialized. Internal means |
| // that the buffer is contained by the receiver struct, as opposed to being |
| // passed as a separately allocated "work buffer". |
| // |
| // For more detail, see: |
| // https://github.com/google/wuffs/blob/master/doc/note/initialization.md |
| #define WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED \ |
| ((uint32_t)0x00000002) |
| |
| // -------- |
| |
| // wuffs_base__empty_struct is used when a Wuffs function returns an empty |
| // struct. In C, if a function f returns void, you can't say "x = f()", but in |
| // Wuffs, if a function g returns empty, you can say "y = g()". |
| typedef struct { |
| // private_impl is a placeholder field. It isn't explicitly used, except that |
| // without it, the sizeof a struct with no fields can differ across C/C++ |
| // compilers, and it is undefined behavior in C99. For example, gcc says that |
| // the sizeof an empty struct is 0, and g++ says that it is 1. This leads to |
| // ABI incompatibility if a Wuffs .c file is processed by one compiler and |
| // its .h file with another compiler. |
| // |
| // Instead, we explicitly insert an otherwise unused field, so that the |
| // sizeof this struct is always 1. |
| uint8_t private_impl; |
| } wuffs_base__empty_struct; |
| |
| static inline wuffs_base__empty_struct // |
| wuffs_base__make_empty_struct() { |
| wuffs_base__empty_struct ret; |
| ret.private_impl = 0; |
| return ret; |
| } |
| |
| // wuffs_base__utility is a placeholder receiver type. It enables what Java |
| // calls static methods, as opposed to regular methods. |
| typedef struct { |
| // private_impl is a placeholder field. It isn't explicitly used, except that |
| // without it, the sizeof a struct with no fields can differ across C/C++ |
| // compilers, and it is undefined behavior in C99. For example, gcc says that |
| // the sizeof an empty struct is 0, and g++ says that it is 1. This leads to |
| // ABI incompatibility if a Wuffs .c file is processed by one compiler and |
| // its .h file with another compiler. |
| // |
| // Instead, we explicitly insert an otherwise unused field, so that the |
| // sizeof this struct is always 1. |
| uint8_t private_impl; |
| } wuffs_base__utility; |
| |
| // -------- |
| |
| // See https://github.com/google/wuffs/blob/master/doc/note/statuses.md |
| typedef const char* wuffs_base__status; |
| |
| extern const char* wuffs_base__warning__end_of_data; |
| extern const char* wuffs_base__warning__metadata_reported; |
| extern const char* wuffs_base__suspension__short_read; |
| extern const char* wuffs_base__suspension__short_write; |
| extern const char* wuffs_base__error__bad_i_o_position; |
| extern const char* wuffs_base__error__bad_argument_length_too_short; |
| extern const char* wuffs_base__error__bad_argument; |
| extern const char* wuffs_base__error__bad_call_sequence; |
| extern const char* wuffs_base__error__bad_receiver; |
| extern const char* wuffs_base__error__bad_restart; |
| extern const char* wuffs_base__error__bad_sizeof_receiver; |
| extern const char* wuffs_base__error__bad_workbuf_length; |
| extern const char* wuffs_base__error__bad_wuffs_version; |
| extern const char* wuffs_base__error__cannot_return_a_suspension; |
| extern const char* wuffs_base__error__disabled_by_previous_error; |
| extern const char* wuffs_base__error__initialize_falsely_claimed_already_zeroed; |
| extern const char* wuffs_base__error__initialize_not_called; |
| extern const char* wuffs_base__error__interleaved_coroutine_calls; |
| extern const char* wuffs_base__error__not_enough_data; |
| extern const char* wuffs_base__error__unsupported_option; |
| extern const char* wuffs_base__error__too_much_data; |
| |
| static inline bool // |
| wuffs_base__status__is_complete(wuffs_base__status z) { |
| return (z == NULL) || ((*z != '$') && (*z != '#')); |
| } |
| |
| static inline bool // |
| wuffs_base__status__is_error(wuffs_base__status z) { |
| return z && (*z == '#'); |
| } |
| |
| static inline bool // |
| wuffs_base__status__is_ok(wuffs_base__status z) { |
| return z == NULL; |
| } |
| |
| static inline bool // |
| wuffs_base__status__is_suspension(wuffs_base__status z) { |
| return z && (*z == '$'); |
| } |
| |
| static inline bool // |
| wuffs_base__status__is_warning(wuffs_base__status z) { |
| return z && (*z != '$') && (*z != '#'); |
| } |
| |
| // wuffs_base__status__message strips the leading '$', '#' or '@'. |
| static inline const char* // |
| wuffs_base__status__message(wuffs_base__status z) { |
| if (z) { |
| if ((*z == '$') || (*z == '#') || (*z == '@')) { |
| return z + 1; |
| } |
| } |
| return z; |
| } |
| |
| // -------- |
| |
| // FourCC constants. |
| |
| // International Color Consortium Profile. |
| #define WUFFS_BASE__FOURCC__ICCP 0x49434350 |
| |
| // Extensible Metadata Platform. |
| #define WUFFS_BASE__FOURCC__XMP 0x584D5020 |
| |
| // -------- |
| |
| // Flicks are a unit of time. One flick (frame-tick) is 1 / 705_600_000 of a |
| // second. See https://github.com/OculusVR/Flicks |
| typedef int64_t wuffs_base__flicks; |
| |
| #define WUFFS_BASE__FLICKS_PER_SECOND ((uint64_t)705600000) |
| #define WUFFS_BASE__FLICKS_PER_MILLISECOND ((uint64_t)705600) |
| |
| // ---------------- Numeric Types |
| |
| static inline uint8_t // |
| wuffs_base__u8__min(uint8_t x, uint8_t y) { |
| return x < y ? x : y; |
| } |
| |
| static inline uint8_t // |
| wuffs_base__u8__max(uint8_t x, uint8_t y) { |
| return x > y ? x : y; |
| } |
| |
| static inline uint16_t // |
| wuffs_base__u16__min(uint16_t x, uint16_t y) { |
| return x < y ? x : y; |
| } |
| |
| static inline uint16_t // |
| wuffs_base__u16__max(uint16_t x, uint16_t y) { |
| return x > y ? x : y; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__u32__min(uint32_t x, uint32_t y) { |
| return x < y ? x : y; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__u32__max(uint32_t x, uint32_t y) { |
| return x > y ? x : y; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__u64__min(uint64_t x, uint64_t y) { |
| return x < y ? x : y; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__u64__max(uint64_t x, uint64_t y) { |
| return x > y ? x : y; |
| } |
| |
| // -------- |
| |
| // Saturating arithmetic (sat_add, sat_sub) branchless bit-twiddling algorithms |
| // are per https://locklessinc.com/articles/sat_arithmetic/ |
| // |
| // It is important that the underlying types are unsigned integers, as signed |
| // integer arithmetic overflow is undefined behavior in C. |
| |
| static inline uint8_t // |
| wuffs_base__u8__sat_add(uint8_t x, uint8_t y) { |
| uint8_t res = (uint8_t)(x + y); |
| res |= (uint8_t)(-(res < x)); |
| return res; |
| } |
| |
| static inline uint8_t // |
| wuffs_base__u8__sat_sub(uint8_t x, uint8_t y) { |
| uint8_t res = (uint8_t)(x - y); |
| res &= (uint8_t)(-(res <= x)); |
| return res; |
| } |
| |
| static inline uint16_t // |
| wuffs_base__u16__sat_add(uint16_t x, uint16_t y) { |
| uint16_t res = (uint16_t)(x + y); |
| res |= (uint16_t)(-(res < x)); |
| return res; |
| } |
| |
| static inline uint16_t // |
| wuffs_base__u16__sat_sub(uint16_t x, uint16_t y) { |
| uint16_t res = (uint16_t)(x - y); |
| res &= (uint16_t)(-(res <= x)); |
| return res; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__u32__sat_add(uint32_t x, uint32_t y) { |
| uint32_t res = (uint32_t)(x + y); |
| res |= (uint32_t)(-(res < x)); |
| return res; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__u32__sat_sub(uint32_t x, uint32_t y) { |
| uint32_t res = (uint32_t)(x - y); |
| res &= (uint32_t)(-(res <= x)); |
| return res; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__u64__sat_add(uint64_t x, uint64_t y) { |
| uint64_t res = (uint64_t)(x + y); |
| res |= (uint64_t)(-(res < x)); |
| return res; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__u64__sat_sub(uint64_t x, uint64_t y) { |
| uint64_t res = (uint64_t)(x - y); |
| res &= (uint64_t)(-(res <= x)); |
| return res; |
| } |
| |
| // ---------------- Slices and Tables |
| |
| // WUFFS_BASE__SLICE is a 1-dimensional buffer. |
| // |
| // len measures a number of elements, not necessarily a size in bytes. |
| // |
| // A value with all fields NULL or zero is a valid, empty slice. |
| #define WUFFS_BASE__SLICE(T) \ |
| struct { \ |
| T* ptr; \ |
| size_t len; \ |
| } |
| |
| // WUFFS_BASE__TABLE is a 2-dimensional buffer. |
| // |
| // width height, and stride measure a number of elements, not necessarily a |
| // size in bytes. |
| // |
| // A value with all fields NULL or zero is a valid, empty table. |
| #define WUFFS_BASE__TABLE(T) \ |
| struct { \ |
| T* ptr; \ |
| size_t width; \ |
| size_t height; \ |
| size_t stride; \ |
| } |
| |
| typedef WUFFS_BASE__SLICE(uint8_t) wuffs_base__slice_u8; |
| typedef WUFFS_BASE__SLICE(uint16_t) wuffs_base__slice_u16; |
| typedef WUFFS_BASE__SLICE(uint32_t) wuffs_base__slice_u32; |
| typedef WUFFS_BASE__SLICE(uint64_t) wuffs_base__slice_u64; |
| |
| typedef WUFFS_BASE__TABLE(uint8_t) wuffs_base__table_u8; |
| typedef WUFFS_BASE__TABLE(uint16_t) wuffs_base__table_u16; |
| typedef WUFFS_BASE__TABLE(uint32_t) wuffs_base__table_u32; |
| typedef WUFFS_BASE__TABLE(uint64_t) wuffs_base__table_u64; |
| |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__make_slice_u8(uint8_t* ptr, size_t len) { |
| wuffs_base__slice_u8 ret; |
| ret.ptr = ptr; |
| ret.len = len; |
| return ret; |
| } |
| |
| static inline wuffs_base__slice_u16 // |
| wuffs_base__make_slice_u16(uint16_t* ptr, size_t len) { |
| wuffs_base__slice_u16 ret; |
| ret.ptr = ptr; |
| ret.len = len; |
| return ret; |
| } |
| |
| static inline wuffs_base__slice_u32 // |
| wuffs_base__make_slice_u32(uint32_t* ptr, size_t len) { |
| wuffs_base__slice_u32 ret; |
| ret.ptr = ptr; |
| ret.len = len; |
| return ret; |
| } |
| |
| static inline wuffs_base__slice_u64 // |
| wuffs_base__make_slice_u64(uint64_t* ptr, size_t len) { |
| wuffs_base__slice_u64 ret; |
| ret.ptr = ptr; |
| ret.len = len; |
| return ret; |
| } |
| |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__empty_slice_u8() { |
| wuffs_base__slice_u8 ret; |
| ret.ptr = NULL; |
| ret.len = 0; |
| return ret; |
| } |
| |
| static inline wuffs_base__table_u8 // |
| wuffs_base__empty_table_u8() { |
| wuffs_base__table_u8 ret; |
| ret.ptr = NULL; |
| ret.width = 0; |
| ret.height = 0; |
| ret.stride = 0; |
| return ret; |
| } |
| |
| // wuffs_base__slice_u8__subslice_i returns s[i:]. |
| // |
| // It returns an empty slice if i is out of bounds. |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__slice_u8__subslice_i(wuffs_base__slice_u8 s, uint64_t i) { |
| if ((i <= SIZE_MAX) && (i <= s.len)) { |
| return wuffs_base__make_slice_u8(s.ptr + i, s.len - i); |
| } |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| |
| // wuffs_base__slice_u8__subslice_j returns s[:j]. |
| // |
| // It returns an empty slice if j is out of bounds. |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__slice_u8__subslice_j(wuffs_base__slice_u8 s, uint64_t j) { |
| if ((j <= SIZE_MAX) && (j <= s.len)) { |
| return wuffs_base__make_slice_u8(s.ptr, j); |
| } |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| |
| // wuffs_base__slice_u8__subslice_ij returns s[i:j]. |
| // |
| // It returns an empty slice if i or j is out of bounds. |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__slice_u8__subslice_ij(wuffs_base__slice_u8 s, |
| uint64_t i, |
| uint64_t j) { |
| if ((i <= j) && (j <= SIZE_MAX) && (j <= s.len)) { |
| return wuffs_base__make_slice_u8(s.ptr + i, j - i); |
| } |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| |
| // ---------------- Ranges and Rects |
| |
| // See https://github.com/google/wuffs/blob/master/doc/note/ranges-and-rects.md |
| |
| typedef struct wuffs_base__range_ii_u32__struct { |
| uint32_t min_incl; |
| uint32_t max_incl; |
| |
| #ifdef __cplusplus |
| inline bool is_empty() const; |
| inline bool equals(wuffs_base__range_ii_u32__struct s) const; |
| inline wuffs_base__range_ii_u32__struct intersect( |
| wuffs_base__range_ii_u32__struct s) const; |
| inline wuffs_base__range_ii_u32__struct unite( |
| wuffs_base__range_ii_u32__struct s) const; |
| inline bool contains(uint32_t x) const; |
| inline bool contains_range(wuffs_base__range_ii_u32__struct s) const; |
| #endif // __cplusplus |
| |
| } wuffs_base__range_ii_u32; |
| |
| static inline wuffs_base__range_ii_u32 // |
| wuffs_base__make_range_ii_u32(uint32_t min_incl, uint32_t max_incl) { |
| wuffs_base__range_ii_u32 ret; |
| ret.min_incl = min_incl; |
| ret.max_incl = max_incl; |
| return ret; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ii_u32__is_empty(const wuffs_base__range_ii_u32* r) { |
| return r->min_incl > r->max_incl; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ii_u32__equals(const wuffs_base__range_ii_u32* r, |
| wuffs_base__range_ii_u32 s) { |
| return (r->min_incl == s.min_incl && r->max_incl == s.max_incl) || |
| (wuffs_base__range_ii_u32__is_empty(r) && |
| wuffs_base__range_ii_u32__is_empty(&s)); |
| } |
| |
| static inline wuffs_base__range_ii_u32 // |
| wuffs_base__range_ii_u32__intersect(const wuffs_base__range_ii_u32* r, |
| wuffs_base__range_ii_u32 s) { |
| wuffs_base__range_ii_u32 t; |
| t.min_incl = wuffs_base__u32__max(r->min_incl, s.min_incl); |
| t.max_incl = wuffs_base__u32__min(r->max_incl, s.max_incl); |
| return t; |
| } |
| |
| static inline wuffs_base__range_ii_u32 // |
| wuffs_base__range_ii_u32__unite(const wuffs_base__range_ii_u32* r, |
| wuffs_base__range_ii_u32 s) { |
| if (wuffs_base__range_ii_u32__is_empty(r)) { |
| return s; |
| } |
| if (wuffs_base__range_ii_u32__is_empty(&s)) { |
| return *r; |
| } |
| wuffs_base__range_ii_u32 t; |
| t.min_incl = wuffs_base__u32__min(r->min_incl, s.min_incl); |
| t.max_incl = wuffs_base__u32__max(r->max_incl, s.max_incl); |
| return t; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ii_u32__contains(const wuffs_base__range_ii_u32* r, |
| uint32_t x) { |
| return (r->min_incl <= x) && (x <= r->max_incl); |
| } |
| |
| static inline bool // |
| wuffs_base__range_ii_u32__contains_range(const wuffs_base__range_ii_u32* r, |
| wuffs_base__range_ii_u32 s) { |
| return wuffs_base__range_ii_u32__equals( |
| &s, wuffs_base__range_ii_u32__intersect(r, s)); |
| } |
| |
| #ifdef __cplusplus |
| |
| inline bool // |
| wuffs_base__range_ii_u32::is_empty() const { |
| return wuffs_base__range_ii_u32__is_empty(this); |
| } |
| |
| inline bool // |
| wuffs_base__range_ii_u32::equals(wuffs_base__range_ii_u32 s) const { |
| return wuffs_base__range_ii_u32__equals(this, s); |
| } |
| |
| inline wuffs_base__range_ii_u32 // |
| wuffs_base__range_ii_u32::intersect(wuffs_base__range_ii_u32 s) const { |
| return wuffs_base__range_ii_u32__intersect(this, s); |
| } |
| |
| inline wuffs_base__range_ii_u32 // |
| wuffs_base__range_ii_u32::unite(wuffs_base__range_ii_u32 s) const { |
| return wuffs_base__range_ii_u32__unite(this, s); |
| } |
| |
| inline bool // |
| wuffs_base__range_ii_u32::contains(uint32_t x) const { |
| return wuffs_base__range_ii_u32__contains(this, x); |
| } |
| |
| inline bool // |
| wuffs_base__range_ii_u32::contains_range(wuffs_base__range_ii_u32 s) const { |
| return wuffs_base__range_ii_u32__contains_range(this, s); |
| } |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| typedef struct wuffs_base__range_ie_u32__struct { |
| uint32_t min_incl; |
| uint32_t max_excl; |
| |
| #ifdef __cplusplus |
| inline bool is_empty() const; |
| inline bool equals(wuffs_base__range_ie_u32__struct s) const; |
| inline wuffs_base__range_ie_u32__struct intersect( |
| wuffs_base__range_ie_u32__struct s) const; |
| inline wuffs_base__range_ie_u32__struct unite( |
| wuffs_base__range_ie_u32__struct s) const; |
| inline bool contains(uint32_t x) const; |
| inline bool contains_range(wuffs_base__range_ie_u32__struct s) const; |
| inline uint32_t length() const; |
| #endif // __cplusplus |
| |
| } wuffs_base__range_ie_u32; |
| |
| static inline wuffs_base__range_ie_u32 // |
| wuffs_base__make_range_ie_u32(uint32_t min_incl, uint32_t max_excl) { |
| wuffs_base__range_ie_u32 ret; |
| ret.min_incl = min_incl; |
| ret.max_excl = max_excl; |
| return ret; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ie_u32__is_empty(const wuffs_base__range_ie_u32* r) { |
| return r->min_incl >= r->max_excl; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ie_u32__equals(const wuffs_base__range_ie_u32* r, |
| wuffs_base__range_ie_u32 s) { |
| return (r->min_incl == s.min_incl && r->max_excl == s.max_excl) || |
| (wuffs_base__range_ie_u32__is_empty(r) && |
| wuffs_base__range_ie_u32__is_empty(&s)); |
| } |
| |
| static inline wuffs_base__range_ie_u32 // |
| wuffs_base__range_ie_u32__intersect(const wuffs_base__range_ie_u32* r, |
| wuffs_base__range_ie_u32 s) { |
| wuffs_base__range_ie_u32 t; |
| t.min_incl = wuffs_base__u32__max(r->min_incl, s.min_incl); |
| t.max_excl = wuffs_base__u32__min(r->max_excl, s.max_excl); |
| return t; |
| } |
| |
| static inline wuffs_base__range_ie_u32 // |
| wuffs_base__range_ie_u32__unite(const wuffs_base__range_ie_u32* r, |
| wuffs_base__range_ie_u32 s) { |
| if (wuffs_base__range_ie_u32__is_empty(r)) { |
| return s; |
| } |
| if (wuffs_base__range_ie_u32__is_empty(&s)) { |
| return *r; |
| } |
| wuffs_base__range_ie_u32 t; |
| t.min_incl = wuffs_base__u32__min(r->min_incl, s.min_incl); |
| t.max_excl = wuffs_base__u32__max(r->max_excl, s.max_excl); |
| return t; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ie_u32__contains(const wuffs_base__range_ie_u32* r, |
| uint32_t x) { |
| return (r->min_incl <= x) && (x < r->max_excl); |
| } |
| |
| static inline bool // |
| wuffs_base__range_ie_u32__contains_range(const wuffs_base__range_ie_u32* r, |
| wuffs_base__range_ie_u32 s) { |
| return wuffs_base__range_ie_u32__equals( |
| &s, wuffs_base__range_ie_u32__intersect(r, s)); |
| } |
| |
| static inline uint32_t // |
| wuffs_base__range_ie_u32__length(const wuffs_base__range_ie_u32* r) { |
| return wuffs_base__u32__sat_sub(r->max_excl, r->min_incl); |
| } |
| |
| #ifdef __cplusplus |
| |
| inline bool // |
| wuffs_base__range_ie_u32::is_empty() const { |
| return wuffs_base__range_ie_u32__is_empty(this); |
| } |
| |
| inline bool // |
| wuffs_base__range_ie_u32::equals(wuffs_base__range_ie_u32 s) const { |
| return wuffs_base__range_ie_u32__equals(this, s); |
| } |
| |
| inline wuffs_base__range_ie_u32 // |
| wuffs_base__range_ie_u32::intersect(wuffs_base__range_ie_u32 s) const { |
| return wuffs_base__range_ie_u32__intersect(this, s); |
| } |
| |
| inline wuffs_base__range_ie_u32 // |
| wuffs_base__range_ie_u32::unite(wuffs_base__range_ie_u32 s) const { |
| return wuffs_base__range_ie_u32__unite(this, s); |
| } |
| |
| inline bool // |
| wuffs_base__range_ie_u32::contains(uint32_t x) const { |
| return wuffs_base__range_ie_u32__contains(this, x); |
| } |
| |
| inline bool // |
| wuffs_base__range_ie_u32::contains_range(wuffs_base__range_ie_u32 s) const { |
| return wuffs_base__range_ie_u32__contains_range(this, s); |
| } |
| |
| inline uint32_t // |
| wuffs_base__range_ie_u32::length() const { |
| return wuffs_base__range_ie_u32__length(this); |
| } |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| typedef struct wuffs_base__range_ii_u64__struct { |
| uint64_t min_incl; |
| uint64_t max_incl; |
| |
| #ifdef __cplusplus |
| inline bool is_empty() const; |
| inline bool equals(wuffs_base__range_ii_u64__struct s) const; |
| inline wuffs_base__range_ii_u64__struct intersect( |
| wuffs_base__range_ii_u64__struct s) const; |
| inline wuffs_base__range_ii_u64__struct unite( |
| wuffs_base__range_ii_u64__struct s) const; |
| inline bool contains(uint64_t x) const; |
| inline bool contains_range(wuffs_base__range_ii_u64__struct s) const; |
| #endif // __cplusplus |
| |
| } wuffs_base__range_ii_u64; |
| |
| static inline wuffs_base__range_ii_u64 // |
| wuffs_base__make_range_ii_u64(uint64_t min_incl, uint64_t max_incl) { |
| wuffs_base__range_ii_u64 ret; |
| ret.min_incl = min_incl; |
| ret.max_incl = max_incl; |
| return ret; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ii_u64__is_empty(const wuffs_base__range_ii_u64* r) { |
| return r->min_incl > r->max_incl; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ii_u64__equals(const wuffs_base__range_ii_u64* r, |
| wuffs_base__range_ii_u64 s) { |
| return (r->min_incl == s.min_incl && r->max_incl == s.max_incl) || |
| (wuffs_base__range_ii_u64__is_empty(r) && |
| wuffs_base__range_ii_u64__is_empty(&s)); |
| } |
| |
| static inline wuffs_base__range_ii_u64 // |
| wuffs_base__range_ii_u64__intersect(const wuffs_base__range_ii_u64* r, |
| wuffs_base__range_ii_u64 s) { |
| wuffs_base__range_ii_u64 t; |
| t.min_incl = wuffs_base__u64__max(r->min_incl, s.min_incl); |
| t.max_incl = wuffs_base__u64__min(r->max_incl, s.max_incl); |
| return t; |
| } |
| |
| static inline wuffs_base__range_ii_u64 // |
| wuffs_base__range_ii_u64__unite(const wuffs_base__range_ii_u64* r, |
| wuffs_base__range_ii_u64 s) { |
| if (wuffs_base__range_ii_u64__is_empty(r)) { |
| return s; |
| } |
| if (wuffs_base__range_ii_u64__is_empty(&s)) { |
| return *r; |
| } |
| wuffs_base__range_ii_u64 t; |
| t.min_incl = wuffs_base__u64__min(r->min_incl, s.min_incl); |
| t.max_incl = wuffs_base__u64__max(r->max_incl, s.max_incl); |
| return t; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ii_u64__contains(const wuffs_base__range_ii_u64* r, |
| uint64_t x) { |
| return (r->min_incl <= x) && (x <= r->max_incl); |
| } |
| |
| static inline bool // |
| wuffs_base__range_ii_u64__contains_range(const wuffs_base__range_ii_u64* r, |
| wuffs_base__range_ii_u64 s) { |
| return wuffs_base__range_ii_u64__equals( |
| &s, wuffs_base__range_ii_u64__intersect(r, s)); |
| } |
| |
| #ifdef __cplusplus |
| |
| inline bool // |
| wuffs_base__range_ii_u64::is_empty() const { |
| return wuffs_base__range_ii_u64__is_empty(this); |
| } |
| |
| inline bool // |
| wuffs_base__range_ii_u64::equals(wuffs_base__range_ii_u64 s) const { |
| return wuffs_base__range_ii_u64__equals(this, s); |
| } |
| |
| inline wuffs_base__range_ii_u64 // |
| wuffs_base__range_ii_u64::intersect(wuffs_base__range_ii_u64 s) const { |
| return wuffs_base__range_ii_u64__intersect(this, s); |
| } |
| |
| inline wuffs_base__range_ii_u64 // |
| wuffs_base__range_ii_u64::unite(wuffs_base__range_ii_u64 s) const { |
| return wuffs_base__range_ii_u64__unite(this, s); |
| } |
| |
| inline bool // |
| wuffs_base__range_ii_u64::contains(uint64_t x) const { |
| return wuffs_base__range_ii_u64__contains(this, x); |
| } |
| |
| inline bool // |
| wuffs_base__range_ii_u64::contains_range(wuffs_base__range_ii_u64 s) const { |
| return wuffs_base__range_ii_u64__contains_range(this, s); |
| } |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| typedef struct wuffs_base__range_ie_u64__struct { |
| uint64_t min_incl; |
| uint64_t max_excl; |
| |
| #ifdef __cplusplus |
| inline bool is_empty() const; |
| inline bool equals(wuffs_base__range_ie_u64__struct s) const; |
| inline wuffs_base__range_ie_u64__struct intersect( |
| wuffs_base__range_ie_u64__struct s) const; |
| inline wuffs_base__range_ie_u64__struct unite( |
| wuffs_base__range_ie_u64__struct s) const; |
| inline bool contains(uint64_t x) const; |
| inline bool contains_range(wuffs_base__range_ie_u64__struct s) const; |
| inline uint64_t length() const; |
| #endif // __cplusplus |
| |
| } wuffs_base__range_ie_u64; |
| |
| static inline wuffs_base__range_ie_u64 // |
| wuffs_base__make_range_ie_u64(uint64_t min_incl, uint64_t max_excl) { |
| wuffs_base__range_ie_u64 ret; |
| ret.min_incl = min_incl; |
| ret.max_excl = max_excl; |
| return ret; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ie_u64__is_empty(const wuffs_base__range_ie_u64* r) { |
| return r->min_incl >= r->max_excl; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ie_u64__equals(const wuffs_base__range_ie_u64* r, |
| wuffs_base__range_ie_u64 s) { |
| return (r->min_incl == s.min_incl && r->max_excl == s.max_excl) || |
| (wuffs_base__range_ie_u64__is_empty(r) && |
| wuffs_base__range_ie_u64__is_empty(&s)); |
| } |
| |
| static inline wuffs_base__range_ie_u64 // |
| wuffs_base__range_ie_u64__intersect(const wuffs_base__range_ie_u64* r, |
| wuffs_base__range_ie_u64 s) { |
| wuffs_base__range_ie_u64 t; |
| t.min_incl = wuffs_base__u64__max(r->min_incl, s.min_incl); |
| t.max_excl = wuffs_base__u64__min(r->max_excl, s.max_excl); |
| return t; |
| } |
| |
| static inline wuffs_base__range_ie_u64 // |
| wuffs_base__range_ie_u64__unite(const wuffs_base__range_ie_u64* r, |
| wuffs_base__range_ie_u64 s) { |
| if (wuffs_base__range_ie_u64__is_empty(r)) { |
| return s; |
| } |
| if (wuffs_base__range_ie_u64__is_empty(&s)) { |
| return *r; |
| } |
| wuffs_base__range_ie_u64 t; |
| t.min_incl = wuffs_base__u64__min(r->min_incl, s.min_incl); |
| t.max_excl = wuffs_base__u64__max(r->max_excl, s.max_excl); |
| return t; |
| } |
| |
| static inline bool // |
| wuffs_base__range_ie_u64__contains(const wuffs_base__range_ie_u64* r, |
| uint64_t x) { |
| return (r->min_incl <= x) && (x < r->max_excl); |
| } |
| |
| static inline bool // |
| wuffs_base__range_ie_u64__contains_range(const wuffs_base__range_ie_u64* r, |
| wuffs_base__range_ie_u64 s) { |
| return wuffs_base__range_ie_u64__equals( |
| &s, wuffs_base__range_ie_u64__intersect(r, s)); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__range_ie_u64__length(const wuffs_base__range_ie_u64* r) { |
| return wuffs_base__u64__sat_sub(r->max_excl, r->min_incl); |
| } |
| |
| #ifdef __cplusplus |
| |
| inline bool // |
| wuffs_base__range_ie_u64::is_empty() const { |
| return wuffs_base__range_ie_u64__is_empty(this); |
| } |
| |
| inline bool // |
| wuffs_base__range_ie_u64::equals(wuffs_base__range_ie_u64 s) const { |
| return wuffs_base__range_ie_u64__equals(this, s); |
| } |
| |
| inline wuffs_base__range_ie_u64 // |
| wuffs_base__range_ie_u64::intersect(wuffs_base__range_ie_u64 s) const { |
| return wuffs_base__range_ie_u64__intersect(this, s); |
| } |
| |
| inline wuffs_base__range_ie_u64 // |
| wuffs_base__range_ie_u64::unite(wuffs_base__range_ie_u64 s) const { |
| return wuffs_base__range_ie_u64__unite(this, s); |
| } |
| |
| inline bool // |
| wuffs_base__range_ie_u64::contains(uint64_t x) const { |
| return wuffs_base__range_ie_u64__contains(this, x); |
| } |
| |
| inline bool // |
| wuffs_base__range_ie_u64::contains_range(wuffs_base__range_ie_u64 s) const { |
| return wuffs_base__range_ie_u64__contains_range(this, s); |
| } |
| |
| inline uint64_t // |
| wuffs_base__range_ie_u64::length() const { |
| return wuffs_base__range_ie_u64__length(this); |
| } |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| typedef struct wuffs_base__rect_ii_u32__struct { |
| uint32_t min_incl_x; |
| uint32_t min_incl_y; |
| uint32_t max_incl_x; |
| uint32_t max_incl_y; |
| |
| #ifdef __cplusplus |
| inline bool is_empty() const; |
| inline bool equals(wuffs_base__rect_ii_u32__struct s) const; |
| inline wuffs_base__rect_ii_u32__struct intersect( |
| wuffs_base__rect_ii_u32__struct s) const; |
| inline wuffs_base__rect_ii_u32__struct unite( |
| wuffs_base__rect_ii_u32__struct s) const; |
| inline bool contains(uint32_t x, uint32_t y) const; |
| inline bool contains_rect(wuffs_base__rect_ii_u32__struct s) const; |
| #endif // __cplusplus |
| |
| } wuffs_base__rect_ii_u32; |
| |
| static inline wuffs_base__rect_ii_u32 // |
| wuffs_base__make_rect_ii_u32(uint32_t min_incl_x, |
| uint32_t min_incl_y, |
| uint32_t max_incl_x, |
| uint32_t max_incl_y) { |
| wuffs_base__rect_ii_u32 ret; |
| ret.min_incl_x = min_incl_x; |
| ret.min_incl_y = min_incl_y; |
| ret.max_incl_x = max_incl_x; |
| ret.max_incl_y = max_incl_y; |
| return ret; |
| } |
| |
| static inline bool // |
| wuffs_base__rect_ii_u32__is_empty(const wuffs_base__rect_ii_u32* r) { |
| return (r->min_incl_x > r->max_incl_x) || (r->min_incl_y > r->max_incl_y); |
| } |
| |
| static inline bool // |
| wuffs_base__rect_ii_u32__equals(const wuffs_base__rect_ii_u32* r, |
| wuffs_base__rect_ii_u32 s) { |
| return (r->min_incl_x == s.min_incl_x && r->min_incl_y == s.min_incl_y && |
| r->max_incl_x == s.max_incl_x && r->max_incl_y == s.max_incl_y) || |
| (wuffs_base__rect_ii_u32__is_empty(r) && |
| wuffs_base__rect_ii_u32__is_empty(&s)); |
| } |
| |
| static inline wuffs_base__rect_ii_u32 // |
| wuffs_base__rect_ii_u32__intersect(const wuffs_base__rect_ii_u32* r, |
| wuffs_base__rect_ii_u32 s) { |
| wuffs_base__rect_ii_u32 t; |
| t.min_incl_x = wuffs_base__u32__max(r->min_incl_x, s.min_incl_x); |
| t.min_incl_y = wuffs_base__u32__max(r->min_incl_y, s.min_incl_y); |
| t.max_incl_x = wuffs_base__u32__min(r->max_incl_x, s.max_incl_x); |
| t.max_incl_y = wuffs_base__u32__min(r->max_incl_y, s.max_incl_y); |
| return t; |
| } |
| |
| static inline wuffs_base__rect_ii_u32 // |
| wuffs_base__rect_ii_u32__unite(const wuffs_base__rect_ii_u32* r, |
| wuffs_base__rect_ii_u32 s) { |
| if (wuffs_base__rect_ii_u32__is_empty(r)) { |
| return s; |
| } |
| if (wuffs_base__rect_ii_u32__is_empty(&s)) { |
| return *r; |
| } |
| wuffs_base__rect_ii_u32 t; |
| t.min_incl_x = wuffs_base__u32__min(r->min_incl_x, s.min_incl_x); |
| t.min_incl_y = wuffs_base__u32__min(r->min_incl_y, s.min_incl_y); |
| t.max_incl_x = wuffs_base__u32__max(r->max_incl_x, s.max_incl_x); |
| t.max_incl_y = wuffs_base__u32__max(r->max_incl_y, s.max_incl_y); |
| return t; |
| } |
| |
| static inline bool // |
| wuffs_base__rect_ii_u32__contains(const wuffs_base__rect_ii_u32* r, |
| uint32_t x, |
| uint32_t y) { |
| return (r->min_incl_x <= x) && (x <= r->max_incl_x) && (r->min_incl_y <= y) && |
| (y <= r->max_incl_y); |
| } |
| |
| static inline bool // |
| wuffs_base__rect_ii_u32__contains_rect(const wuffs_base__rect_ii_u32* r, |
| wuffs_base__rect_ii_u32 s) { |
| return wuffs_base__rect_ii_u32__equals( |
| &s, wuffs_base__rect_ii_u32__intersect(r, s)); |
| } |
| |
| #ifdef __cplusplus |
| |
| inline bool // |
| wuffs_base__rect_ii_u32::is_empty() const { |
| return wuffs_base__rect_ii_u32__is_empty(this); |
| } |
| |
| inline bool // |
| wuffs_base__rect_ii_u32::equals(wuffs_base__rect_ii_u32 s) const { |
| return wuffs_base__rect_ii_u32__equals(this, s); |
| } |
| |
| inline wuffs_base__rect_ii_u32 // |
| wuffs_base__rect_ii_u32::intersect(wuffs_base__rect_ii_u32 s) const { |
| return wuffs_base__rect_ii_u32__intersect(this, s); |
| } |
| |
| inline wuffs_base__rect_ii_u32 // |
| wuffs_base__rect_ii_u32::unite(wuffs_base__rect_ii_u32 s) const { |
| return wuffs_base__rect_ii_u32__unite(this, s); |
| } |
| |
| inline bool // |
| wuffs_base__rect_ii_u32::contains(uint32_t x, uint32_t y) const { |
| return wuffs_base__rect_ii_u32__contains(this, x, y); |
| } |
| |
| inline bool // |
| wuffs_base__rect_ii_u32::contains_rect(wuffs_base__rect_ii_u32 s) const { |
| return wuffs_base__rect_ii_u32__contains_rect(this, s); |
| } |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| typedef struct wuffs_base__rect_ie_u32__struct { |
| uint32_t min_incl_x; |
| uint32_t min_incl_y; |
| uint32_t max_excl_x; |
| uint32_t max_excl_y; |
| |
| #ifdef __cplusplus |
| inline bool is_empty() const; |
| inline bool equals(wuffs_base__rect_ie_u32__struct s) const; |
| inline wuffs_base__rect_ie_u32__struct intersect( |
| wuffs_base__rect_ie_u32__struct s) const; |
| inline wuffs_base__rect_ie_u32__struct unite( |
| wuffs_base__rect_ie_u32__struct s) const; |
| inline bool contains(uint32_t x, uint32_t y) const; |
| inline bool contains_rect(wuffs_base__rect_ie_u32__struct s) const; |
| inline uint32_t width() const; |
| inline uint32_t height() const; |
| #endif // __cplusplus |
| |
| } wuffs_base__rect_ie_u32; |
| |
| static inline wuffs_base__rect_ie_u32 // |
| wuffs_base__make_rect_ie_u32(uint32_t min_incl_x, |
| uint32_t min_incl_y, |
| uint32_t max_excl_x, |
| uint32_t max_excl_y) { |
| wuffs_base__rect_ie_u32 ret; |
| ret.min_incl_x = min_incl_x; |
| ret.min_incl_y = min_incl_y; |
| ret.max_excl_x = max_excl_x; |
| ret.max_excl_y = max_excl_y; |
| return ret; |
| } |
| |
| static inline bool // |
| wuffs_base__rect_ie_u32__is_empty(const wuffs_base__rect_ie_u32* r) { |
| return (r->min_incl_x >= r->max_excl_x) || (r->min_incl_y >= r->max_excl_y); |
| } |
| |
| static inline bool // |
| wuffs_base__rect_ie_u32__equals(const wuffs_base__rect_ie_u32* r, |
| wuffs_base__rect_ie_u32 s) { |
| return (r->min_incl_x == s.min_incl_x && r->min_incl_y == s.min_incl_y && |
| r->max_excl_x == s.max_excl_x && r->max_excl_y == s.max_excl_y) || |
| (wuffs_base__rect_ie_u32__is_empty(r) && |
| wuffs_base__rect_ie_u32__is_empty(&s)); |
| } |
| |
| static inline wuffs_base__rect_ie_u32 // |
| wuffs_base__rect_ie_u32__intersect(const wuffs_base__rect_ie_u32* r, |
| wuffs_base__rect_ie_u32 s) { |
| wuffs_base__rect_ie_u32 t; |
| t.min_incl_x = wuffs_base__u32__max(r->min_incl_x, s.min_incl_x); |
| t.min_incl_y = wuffs_base__u32__max(r->min_incl_y, s.min_incl_y); |
| t.max_excl_x = wuffs_base__u32__min(r->max_excl_x, s.max_excl_x); |
| t.max_excl_y = wuffs_base__u32__min(r->max_excl_y, s.max_excl_y); |
| return t; |
| } |
| |
| static inline wuffs_base__rect_ie_u32 // |
| wuffs_base__rect_ie_u32__unite(const wuffs_base__rect_ie_u32* r, |
| wuffs_base__rect_ie_u32 s) { |
| if (wuffs_base__rect_ie_u32__is_empty(r)) { |
| return s; |
| } |
| if (wuffs_base__rect_ie_u32__is_empty(&s)) { |
| return *r; |
| } |
| wuffs_base__rect_ie_u32 t; |
| t.min_incl_x = wuffs_base__u32__min(r->min_incl_x, s.min_incl_x); |
| t.min_incl_y = wuffs_base__u32__min(r->min_incl_y, s.min_incl_y); |
| t.max_excl_x = wuffs_base__u32__max(r->max_excl_x, s.max_excl_x); |
| t.max_excl_y = wuffs_base__u32__max(r->max_excl_y, s.max_excl_y); |
| return t; |
| } |
| |
| static inline bool // |
| wuffs_base__rect_ie_u32__contains(const wuffs_base__rect_ie_u32* r, |
| uint32_t x, |
| uint32_t y) { |
| return (r->min_incl_x <= x) && (x < r->max_excl_x) && (r->min_incl_y <= y) && |
| (y < r->max_excl_y); |
| } |
| |
| static inline bool // |
| wuffs_base__rect_ie_u32__contains_rect(const wuffs_base__rect_ie_u32* r, |
| wuffs_base__rect_ie_u32 s) { |
| return wuffs_base__rect_ie_u32__equals( |
| &s, wuffs_base__rect_ie_u32__intersect(r, s)); |
| } |
| |
| static inline uint32_t // |
| wuffs_base__rect_ie_u32__width(const wuffs_base__rect_ie_u32* r) { |
| return wuffs_base__u32__sat_sub(r->max_excl_x, r->min_incl_x); |
| } |
| |
| static inline uint32_t // |
| wuffs_base__rect_ie_u32__height(const wuffs_base__rect_ie_u32* r) { |
| return wuffs_base__u32__sat_sub(r->max_excl_y, r->min_incl_y); |
| } |
| |
| #ifdef __cplusplus |
| |
| inline bool // |
| wuffs_base__rect_ie_u32::is_empty() const { |
| return wuffs_base__rect_ie_u32__is_empty(this); |
| } |
| |
| inline bool // |
| wuffs_base__rect_ie_u32::equals(wuffs_base__rect_ie_u32 s) const { |
| return wuffs_base__rect_ie_u32__equals(this, s); |
| } |
| |
| inline wuffs_base__rect_ie_u32 // |
| wuffs_base__rect_ie_u32::intersect(wuffs_base__rect_ie_u32 s) const { |
| return wuffs_base__rect_ie_u32__intersect(this, s); |
| } |
| |
| inline wuffs_base__rect_ie_u32 // |
| wuffs_base__rect_ie_u32::unite(wuffs_base__rect_ie_u32 s) const { |
| return wuffs_base__rect_ie_u32__unite(this, s); |
| } |
| |
| inline bool // |
| wuffs_base__rect_ie_u32::contains(uint32_t x, uint32_t y) const { |
| return wuffs_base__rect_ie_u32__contains(this, x, y); |
| } |
| |
| inline bool // |
| wuffs_base__rect_ie_u32::contains_rect(wuffs_base__rect_ie_u32 s) const { |
| return wuffs_base__rect_ie_u32__contains_rect(this, s); |
| } |
| |
| inline uint32_t // |
| wuffs_base__rect_ie_u32::width() const { |
| return wuffs_base__rect_ie_u32__width(this); |
| } |
| |
| inline uint32_t // |
| wuffs_base__rect_ie_u32::height() const { |
| return wuffs_base__rect_ie_u32__height(this); |
| } |
| |
| #endif // __cplusplus |
| |
| // ---------------- I/O |
| // |
| // See (/doc/note/io-input-output.md). |
| |
| // wuffs_base__io_buffer_meta is the metadata for a wuffs_base__io_buffer's |
| // data. |
| typedef struct { |
| size_t wi; // Write index. Invariant: wi <= len. |
| size_t ri; // Read index. Invariant: ri <= wi. |
| uint64_t pos; // Position of the buffer start relative to the stream start. |
| bool closed; // No further writes are expected. |
| } wuffs_base__io_buffer_meta; |
| |
| // wuffs_base__io_buffer is a 1-dimensional buffer (a pointer and length) plus |
| // additional metadata. |
| // |
| // A value with all fields zero is a valid, empty buffer. |
| typedef struct { |
| wuffs_base__slice_u8 data; |
| wuffs_base__io_buffer_meta meta; |
| |
| #ifdef __cplusplus |
| inline void compact(); |
| inline uint64_t reader_available() const; |
| inline uint64_t reader_io_position() const; |
| inline uint64_t writer_available() const; |
| inline uint64_t writer_io_position() const; |
| #endif // __cplusplus |
| |
| } wuffs_base__io_buffer; |
| |
| static inline wuffs_base__io_buffer // |
| wuffs_base__make_io_buffer(wuffs_base__slice_u8 data, |
| wuffs_base__io_buffer_meta meta) { |
| wuffs_base__io_buffer ret; |
| ret.data = data; |
| ret.meta = meta; |
| return ret; |
| } |
| |
| static inline wuffs_base__io_buffer_meta // |
| wuffs_base__make_io_buffer_meta(size_t wi, |
| size_t ri, |
| uint64_t pos, |
| bool closed) { |
| wuffs_base__io_buffer_meta ret; |
| ret.wi = wi; |
| ret.ri = ri; |
| ret.pos = pos; |
| ret.closed = closed; |
| return ret; |
| } |
| |
| static inline wuffs_base__io_buffer // |
| wuffs_base__empty_io_buffer() { |
| wuffs_base__io_buffer ret; |
| ret.data.ptr = NULL; |
| ret.data.len = 0; |
| ret.meta.wi = 0; |
| ret.meta.ri = 0; |
| ret.meta.pos = 0; |
| ret.meta.closed = false; |
| return ret; |
| } |
| |
| static inline wuffs_base__io_buffer_meta // |
| wuffs_base__empty_io_buffer_meta() { |
| wuffs_base__io_buffer_meta ret; |
| ret.wi = 0; |
| ret.ri = 0; |
| ret.pos = 0; |
| ret.closed = false; |
| return ret; |
| } |
| |
| // wuffs_base__io_buffer__compact moves any written but unread bytes to the |
| // start of the buffer. |
| static inline void // |
| wuffs_base__io_buffer__compact(wuffs_base__io_buffer* buf) { |
| if (!buf || (buf->meta.ri == 0)) { |
| return; |
| } |
| buf->meta.pos = wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri); |
| size_t n = buf->meta.wi - buf->meta.ri; |
| if (n != 0) { |
| memmove(buf->data.ptr, buf->data.ptr + buf->meta.ri, n); |
| } |
| buf->meta.wi = n; |
| buf->meta.ri = 0; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__io_buffer__reader_available(const wuffs_base__io_buffer* buf) { |
| return buf ? buf->meta.wi - buf->meta.ri : 0; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__io_buffer__reader_io_position(const wuffs_base__io_buffer* buf) { |
| return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri) : 0; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__io_buffer__writer_available(const wuffs_base__io_buffer* buf) { |
| return buf ? buf->data.len - buf->meta.wi : 0; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__io_buffer__writer_io_position(const wuffs_base__io_buffer* buf) { |
| return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.wi) : 0; |
| } |
| |
| #ifdef __cplusplus |
| |
| inline void // |
| wuffs_base__io_buffer::compact() { |
| wuffs_base__io_buffer__compact(this); |
| } |
| |
| inline uint64_t // |
| wuffs_base__io_buffer::reader_available() const { |
| return wuffs_base__io_buffer__reader_available(this); |
| } |
| |
| inline uint64_t // |
| wuffs_base__io_buffer::reader_io_position() const { |
| return wuffs_base__io_buffer__reader_io_position(this); |
| } |
| |
| inline uint64_t // |
| wuffs_base__io_buffer::writer_available() const { |
| return wuffs_base__io_buffer__writer_available(this); |
| } |
| |
| inline uint64_t // |
| wuffs_base__io_buffer::writer_io_position() const { |
| return wuffs_base__io_buffer__writer_io_position(this); |
| } |
| |
| #endif // __cplusplus |
| |
| // ---------------- Memory Allocation |
| |
| // The memory allocation related functions in this section aren't used by Wuffs |
| // per se, but they may be helpful to the code that uses Wuffs. |
| |
| // wuffs_base__malloc_slice_uxx wraps calling a malloc-like function, except |
| // that it takes a uint64_t number of elements instead of a size_t size in |
| // bytes, and it returns a slice (a pointer and a length) instead of just a |
| // pointer. |
| // |
| // You can pass the C stdlib's malloc as the malloc_func. |
| // |
| // It returns an empty slice (containing a NULL ptr field) if (num_uxx * |
| // sizeof(uintxx_t)) would overflow SIZE_MAX. |
| |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__malloc_slice_u8(void* (*malloc_func)(size_t), uint64_t num_u8) { |
| if (malloc_func && (num_u8 <= (SIZE_MAX / sizeof(uint8_t)))) { |
| void* p = (*malloc_func)(num_u8 * sizeof(uint8_t)); |
| if (p) { |
| return wuffs_base__make_slice_u8((uint8_t*)(p), num_u8); |
| } |
| } |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| |
| static inline wuffs_base__slice_u16 // |
| wuffs_base__malloc_slice_u16(void* (*malloc_func)(size_t), uint64_t num_u16) { |
| if (malloc_func && (num_u16 <= (SIZE_MAX / sizeof(uint16_t)))) { |
| void* p = (*malloc_func)(num_u16 * sizeof(uint16_t)); |
| if (p) { |
| return wuffs_base__make_slice_u16((uint16_t*)(p), num_u16); |
| } |
| } |
| return wuffs_base__make_slice_u16(NULL, 0); |
| } |
| |
| static inline wuffs_base__slice_u32 // |
| wuffs_base__malloc_slice_u32(void* (*malloc_func)(size_t), uint64_t num_u32) { |
| if (malloc_func && (num_u32 <= (SIZE_MAX / sizeof(uint32_t)))) { |
| void* p = (*malloc_func)(num_u32 * sizeof(uint32_t)); |
| if (p) { |
| return wuffs_base__make_slice_u32((uint32_t*)(p), num_u32); |
| } |
| } |
| return wuffs_base__make_slice_u32(NULL, 0); |
| } |
| |
| static inline wuffs_base__slice_u64 // |
| wuffs_base__malloc_slice_u64(void* (*malloc_func)(size_t), uint64_t num_u64) { |
| if (malloc_func && (num_u64 <= (SIZE_MAX / sizeof(uint64_t)))) { |
| void* p = (*malloc_func)(num_u64 * sizeof(uint64_t)); |
| if (p) { |
| return wuffs_base__make_slice_u64((uint64_t*)(p), num_u64); |
| } |
| } |
| return wuffs_base__make_slice_u64(NULL, 0); |
| } |
| |
| // ---------------- Images |
| |
| // wuffs_base__color_u32_argb_premul is an 8 bit per channel premultiplied |
| // Alpha, Red, Green, Blue color, as a uint32_t value. It is in word order, not |
| // byte order: its value is always 0xAARRGGBB, regardless of endianness. |
| typedef uint32_t wuffs_base__color_u32_argb_premul; |
| |
| // -------- |
| |
| // wuffs_base__pixel_format encodes the format of the bytes that constitute an |
| // image frame's pixel data. |
| // |
| // See https://github.com/google/wuffs/blob/master/doc/note/pixel-formats.md |
| // |
| // Do not manipulate its bits directly; they are private implementation |
| // details. Use methods such as wuffs_base__pixel_format__num_planes instead. |
| typedef uint32_t wuffs_base__pixel_format; |
| |
| // Common 8-bit-depth pixel formats. This list is not exhaustive; not all valid |
| // wuffs_base__pixel_format values are present. |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__INVALID ((wuffs_base__pixel_format)0x00000000) |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__A ((wuffs_base__pixel_format)0x02000008) |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__Y ((wuffs_base__pixel_format)0x10000008) |
| #define WUFFS_BASE__PIXEL_FORMAT__YA_NONPREMUL \ |
| ((wuffs_base__pixel_format)0x15000008) |
| #define WUFFS_BASE__PIXEL_FORMAT__YA_PREMUL \ |
| ((wuffs_base__pixel_format)0x16000008) |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__YCBCR ((wuffs_base__pixel_format)0x20020888) |
| #define WUFFS_BASE__PIXEL_FORMAT__YCBCRK ((wuffs_base__pixel_format)0x21038888) |
| #define WUFFS_BASE__PIXEL_FORMAT__YCBCRA_NONPREMUL \ |
| ((wuffs_base__pixel_format)0x25038888) |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__YCOCG ((wuffs_base__pixel_format)0x30020888) |
| #define WUFFS_BASE__PIXEL_FORMAT__YCOCGK ((wuffs_base__pixel_format)0x31038888) |
| #define WUFFS_BASE__PIXEL_FORMAT__YCOCGA_NONPREMUL \ |
| ((wuffs_base__pixel_format)0x35038888) |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL \ |
| ((wuffs_base__pixel_format)0x45040008) |
| #define WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL \ |
| ((wuffs_base__pixel_format)0x46040008) |
| #define WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY \ |
| ((wuffs_base__pixel_format)0x47040008) |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__BGR ((wuffs_base__pixel_format)0x40000888) |
| #define WUFFS_BASE__PIXEL_FORMAT__BGRX ((wuffs_base__pixel_format)0x41008888) |
| #define WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL \ |
| ((wuffs_base__pixel_format)0x45008888) |
| #define WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL \ |
| ((wuffs_base__pixel_format)0x46008888) |
| #define WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY \ |
| ((wuffs_base__pixel_format)0x47008888) |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__RGB ((wuffs_base__pixel_format)0x50000888) |
| #define WUFFS_BASE__PIXEL_FORMAT__RGBX ((wuffs_base__pixel_format)0x51008888) |
| #define WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL \ |
| ((wuffs_base__pixel_format)0x55008888) |
| #define WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL \ |
| ((wuffs_base__pixel_format)0x56008888) |
| #define WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY \ |
| ((wuffs_base__pixel_format)0x57008888) |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__CMY ((wuffs_base__pixel_format)0x60020888) |
| #define WUFFS_BASE__PIXEL_FORMAT__CMYK ((wuffs_base__pixel_format)0x61038888) |
| |
| extern const uint32_t wuffs_base__pixel_format__bits_per_channel[16]; |
| |
| static inline bool // |
| wuffs_base__pixel_format__is_valid(wuffs_base__pixel_format f) { |
| return f != 0; |
| } |
| |
| // wuffs_base__pixel_format__bits_per_pixel returns the number of bits per |
| // pixel for interleaved pixel formats, and returns 0 for planar pixel formats. |
| static inline uint32_t // |
| wuffs_base__pixel_format__bits_per_pixel(wuffs_base__pixel_format f) { |
| if (((f >> 16) & 0x03) != 0) { |
| return 0; |
| } |
| return wuffs_base__pixel_format__bits_per_channel[0x0F & (f >> 0)] + |
| wuffs_base__pixel_format__bits_per_channel[0x0F & (f >> 4)] + |
| wuffs_base__pixel_format__bits_per_channel[0x0F & (f >> 8)] + |
| wuffs_base__pixel_format__bits_per_channel[0x0F & (f >> 12)]; |
| } |
| |
| static inline bool // |
| wuffs_base__pixel_format__is_indexed(wuffs_base__pixel_format f) { |
| return (f >> 18) & 0x01; |
| } |
| |
| static inline bool // |
| wuffs_base__pixel_format__is_interleaved(wuffs_base__pixel_format f) { |
| return ((f >> 16) & 0x03) == 0; |
| } |
| |
| static inline bool // |
| wuffs_base__pixel_format__is_planar(wuffs_base__pixel_format f) { |
| return ((f >> 16) & 0x03) != 0; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__pixel_format__num_planes(wuffs_base__pixel_format f) { |
| return ((f >> 16) & 0x03) + 1; |
| } |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX 4 |
| |
| #define WUFFS_BASE__PIXEL_FORMAT__INDEXED__INDEX_PLANE 0 |
| #define WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE 3 |
| |
| // -------- |
| |
| // wuffs_base__pixel_subsampling encodes whether sample values cover one pixel |
| // or cover multiple pixels. |
| // |
| // See https://github.com/google/wuffs/blob/master/doc/note/pixel-subsampling.md |
| // |
| // Do not manipulate its bits directly; they are private implementation |
| // details. Use methods such as wuffs_base__pixel_subsampling__bias_x instead. |
| typedef uint32_t wuffs_base__pixel_subsampling; |
| |
| #define WUFFS_BASE__PIXEL_SUBSAMPLING__NONE ((wuffs_base__pixel_subsampling)0) |
| |
| #define WUFFS_BASE__PIXEL_SUBSAMPLING__444 \ |
| ((wuffs_base__pixel_subsampling)0x000000) |
| #define WUFFS_BASE__PIXEL_SUBSAMPLING__440 \ |
| ((wuffs_base__pixel_subsampling)0x010100) |
| #define WUFFS_BASE__PIXEL_SUBSAMPLING__422 \ |
| ((wuffs_base__pixel_subsampling)0x101000) |
| #define WUFFS_BASE__PIXEL_SUBSAMPLING__420 \ |
| ((wuffs_base__pixel_subsampling)0x111100) |
| #define WUFFS_BASE__PIXEL_SUBSAMPLING__411 \ |
| ((wuffs_base__pixel_subsampling)0x303000) |
| #define WUFFS_BASE__PIXEL_SUBSAMPLING__410 \ |
| ((wuffs_base__pixel_subsampling)0x313100) |
| |
| static inline uint32_t // |
| wuffs_base__pixel_subsampling__bias_x(wuffs_base__pixel_subsampling s, |
| uint32_t plane) { |
| uint32_t shift = ((plane & 0x03) * 8) + 6; |
| return (s >> shift) & 0x03; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__pixel_subsampling__denominator_x(wuffs_base__pixel_subsampling s, |
| uint32_t plane) { |
| uint32_t shift = ((plane & 0x03) * 8) + 4; |
| return ((s >> shift) & 0x03) + 1; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__pixel_subsampling__bias_y(wuffs_base__pixel_subsampling s, |
| uint32_t plane) { |
| uint32_t shift = ((plane & 0x03) * 8) + 2; |
| return (s >> shift) & 0x03; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__pixel_subsampling__denominator_y(wuffs_base__pixel_subsampling s, |
| uint32_t plane) { |
| uint32_t shift = ((plane & 0x03) * 8) + 0; |
| return ((s >> shift) & 0x03) + 1; |
| } |
| |
| // -------- |
| |
| typedef struct { |
| // Do not access the private_impl's fields directly. There is no API/ABI |
| // compatibility or safety guarantee if you do so. |
| struct { |
| wuffs_base__pixel_format pixfmt; |
| wuffs_base__pixel_subsampling pixsub; |
| uint32_t width; |
| uint32_t height; |
| } private_impl; |
| |
| #ifdef __cplusplus |
| inline void set(wuffs_base__pixel_format pixfmt, |
| wuffs_base__pixel_subsampling pixsub, |
| uint32_t width, |
| uint32_t height); |
| inline void invalidate(); |
| inline bool is_valid() const; |
| inline wuffs_base__pixel_format pixel_format() const; |
| inline wuffs_base__pixel_subsampling pixel_subsampling() const; |
| inline wuffs_base__rect_ie_u32 bounds() const; |
| inline uint32_t width() const; |
| inline uint32_t height() const; |
| inline uint64_t pixbuf_len() const; |
| #endif // __cplusplus |
| |
| } wuffs_base__pixel_config; |
| |
| static inline wuffs_base__pixel_config // |
| wuffs_base__null_pixel_config() { |
| wuffs_base__pixel_config ret; |
| ret.private_impl.pixfmt = 0; |
| ret.private_impl.pixsub = 0; |
| ret.private_impl.width = 0; |
| ret.private_impl.height = 0; |
| return ret; |
| } |
| |
| // TODO: Should this function return bool? An error type? |
| static inline void // |
| wuffs_base__pixel_config__set(wuffs_base__pixel_config* c, |
| wuffs_base__pixel_format pixfmt, |
| wuffs_base__pixel_subsampling pixsub, |
| uint32_t width, |
| uint32_t height) { |
| if (!c) { |
| return; |
| } |
| if (pixfmt) { |
| uint64_t wh = ((uint64_t)width) * ((uint64_t)height); |
| // TODO: handle things other than 1 byte per pixel. |
| if (wh <= ((uint64_t)SIZE_MAX)) { |
| c->private_impl.pixfmt = pixfmt; |
| c->private_impl.pixsub = pixsub; |
| c->private_impl.width = width; |
| c->private_impl.height = height; |
| return; |
| } |
| } |
| |
| c->private_impl.pixfmt = 0; |
| c->private_impl.pixsub = 0; |
| c->private_impl.width = 0; |
| c->private_impl.height = 0; |
| } |
| |
| static inline void // |
| wuffs_base__pixel_config__invalidate(wuffs_base__pixel_config* c) { |
| if (c) { |
| c->private_impl.pixfmt = 0; |
| c->private_impl.pixsub = 0; |
| c->private_impl.width = 0; |
| c->private_impl.height = 0; |
| } |
| } |
| |
| static inline bool // |
| wuffs_base__pixel_config__is_valid(const wuffs_base__pixel_config* c) { |
| return c && c->private_impl.pixfmt; |
| } |
| |
| static inline wuffs_base__pixel_format // |
| wuffs_base__pixel_config__pixel_format(const wuffs_base__pixel_config* c) { |
| return c ? c->private_impl.pixfmt : 0; |
| } |
| |
| static inline wuffs_base__pixel_subsampling // |
| wuffs_base__pixel_config__pixel_subsampling(const wuffs_base__pixel_config* c) { |
| return c ? c->private_impl.pixsub : 0; |
| } |
| |
| static inline wuffs_base__rect_ie_u32 // |
| wuffs_base__pixel_config__bounds(const wuffs_base__pixel_config* c) { |
| if (c) { |
| wuffs_base__rect_ie_u32 ret; |
| ret.min_incl_x = 0; |
| ret.min_incl_y = 0; |
| ret.max_excl_x = c->private_impl.width; |
| ret.max_excl_y = c->private_impl.height; |
| return ret; |
| } |
| |
| wuffs_base__rect_ie_u32 ret; |
| ret.min_incl_x = 0; |
| ret.min_incl_y = 0; |
| ret.max_excl_x = 0; |
| ret.max_excl_y = 0; |
| return ret; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__pixel_config__width(const wuffs_base__pixel_config* c) { |
| return c ? c->private_impl.width : 0; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__pixel_config__height(const wuffs_base__pixel_config* c) { |
| return c ? c->private_impl.height : 0; |
| } |
| |
| // TODO: this is the right API for planar (not interleaved) pixbufs? Should it |
| // allow decoding into a color model different from the format's intrinsic one? |
| // For example, decoding a JPEG image straight to RGBA instead of to YCbCr? |
| static inline uint64_t // |
| wuffs_base__pixel_config__pixbuf_len(const wuffs_base__pixel_config* c) { |
| if (!c) { |
| return 0; |
| } |
| if (wuffs_base__pixel_format__is_planar(c->private_impl.pixfmt)) { |
| // TODO: support planar pixel formats, concious of pixel subsampling. |
| return 0; |
| } |
| uint32_t bits_per_pixel = |
| wuffs_base__pixel_format__bits_per_pixel(c->private_impl.pixfmt); |
| if ((bits_per_pixel == 0) || ((bits_per_pixel % 8) != 0)) { |
| // TODO: support fraction-of-byte pixels, e.g. 1 bit per pixel? |
| return 0; |
| } |
| uint64_t bytes_per_pixel = bits_per_pixel / 8; |
| |
| uint64_t n = |
| ((uint64_t)c->private_impl.width) * ((uint64_t)c->private_impl.height); |
| if (n > (UINT64_MAX / bytes_per_pixel)) { |
| return 0; |
| } |
| n *= bytes_per_pixel; |
| |
| if (wuffs_base__pixel_format__is_indexed(c->private_impl.pixfmt)) { |
| if (n > (UINT64_MAX - 1024)) { |
| return 0; |
| } |
| n += 1024; |
| } |
| |
| return n; |
| } |
| |
| #ifdef __cplusplus |
| |
| inline void // |
| wuffs_base__pixel_config::set(wuffs_base__pixel_format pixfmt, |
| wuffs_base__pixel_subsampling pixsub, |
| uint32_t width, |
| uint32_t height) { |
| wuffs_base__pixel_config__set(this, pixfmt, pixsub, width, height); |
| } |
| |
| inline void // |
| wuffs_base__pixel_config::invalidate() { |
| wuffs_base__pixel_config__invalidate(this); |
| } |
| |
| inline bool // |
| wuffs_base__pixel_config::is_valid() const { |
| return wuffs_base__pixel_config__is_valid(this); |
| } |
| |
| inline wuffs_base__pixel_format // |
| wuffs_base__pixel_config::pixel_format() const { |
| return wuffs_base__pixel_config__pixel_format(this); |
| } |
| |
| inline wuffs_base__pixel_subsampling // |
| wuffs_base__pixel_config::pixel_subsampling() const { |
| return wuffs_base__pixel_config__pixel_subsampling(this); |
| } |
| |
| inline wuffs_base__rect_ie_u32 // |
| wuffs_base__pixel_config::bounds() const { |
| return wuffs_base__pixel_config__bounds(this); |
| } |
| |
| inline uint32_t // |
| wuffs_base__pixel_config::width() const { |
| return wuffs_base__pixel_config__width(this); |
| } |
| |
| inline uint32_t // |
| wuffs_base__pixel_config::height() const { |
| return wuffs_base__pixel_config__height(this); |
| } |
| |
| inline uint64_t // |
| wuffs_base__pixel_config::pixbuf_len() const { |
| return wuffs_base__pixel_config__pixbuf_len(this); |
| } |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| typedef struct { |
| wuffs_base__pixel_config pixcfg; |
| |
| // Do not access the private_impl's fields directly. There is no API/ABI |
| // compatibility or safety guarantee if you do so. |
| struct { |
| uint64_t first_frame_io_position; |
| bool first_frame_is_opaque; |
| } private_impl; |
| |
| #ifdef __cplusplus |
| inline void set(wuffs_base__pixel_format pixfmt, |
| wuffs_base__pixel_subsampling pixsub, |
| uint32_t width, |
| uint32_t height, |
| uint64_t first_frame_io_position, |
| bool first_frame_is_opaque); |
| inline void invalidate(); |
| inline bool is_valid() const; |
| inline uint64_t first_frame_io_position() const; |
| inline bool first_frame_is_opaque() const; |
| #endif // __cplusplus |
| |
| } wuffs_base__image_config; |
| |
| static inline wuffs_base__image_config // |
| wuffs_base__null_image_config() { |
| wuffs_base__image_config ret; |
| ret.pixcfg = wuffs_base__null_pixel_config(); |
| ret.private_impl.first_frame_io_position = 0; |
| ret.private_impl.first_frame_is_opaque = false; |
| return ret; |
| } |
| |
| // TODO: Should this function return bool? An error type? |
| static inline void // |
| wuffs_base__image_config__set(wuffs_base__image_config* c, |
| wuffs_base__pixel_format pixfmt, |
| wuffs_base__pixel_subsampling pixsub, |
| uint32_t width, |
| uint32_t height, |
| uint64_t first_frame_io_position, |
| bool first_frame_is_opaque) { |
| if (!c) { |
| return; |
| } |
| if (wuffs_base__pixel_format__is_valid(pixfmt)) { |
| c->pixcfg.private_impl.pixfmt = pixfmt; |
| c->pixcfg.private_impl.pixsub = pixsub; |
| c->pixcfg.private_impl.width = width; |
| c->pixcfg.private_impl.height = height; |
| c->private_impl.first_frame_io_position = first_frame_io_position; |
| c->private_impl.first_frame_is_opaque = first_frame_is_opaque; |
| return; |
| } |
| |
| c->pixcfg.private_impl.pixfmt = 0; |
| c->pixcfg.private_impl.pixsub = 0; |
| c->pixcfg.private_impl.width = 0; |
| c->pixcfg.private_impl.height = 0; |
| c->private_impl.first_frame_io_position = 0; |
| c->private_impl.first_frame_is_opaque = 0; |
| } |
| |
| static inline void // |
| wuffs_base__image_config__invalidate(wuffs_base__image_config* c) { |
| if (c) { |
| c->pixcfg.private_impl.pixfmt = 0; |
| c->pixcfg.private_impl.pixsub = 0; |
| c->pixcfg.private_impl.width = 0; |
| c->pixcfg.private_impl.height = 0; |
| c->private_impl.first_frame_io_position = 0; |
| c->private_impl.first_frame_is_opaque = 0; |
| } |
| } |
| |
| static inline bool // |
| wuffs_base__image_config__is_valid(const wuffs_base__image_config* c) { |
| return c && wuffs_base__pixel_config__is_valid(&(c->pixcfg)); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__image_config__first_frame_io_position( |
| const wuffs_base__image_config* c) { |
| return c ? c->private_impl.first_frame_io_position : 0; |
| } |
| |
| static inline bool // |
| wuffs_base__image_config__first_frame_is_opaque( |
| const wuffs_base__image_config* c) { |
| return c ? c->private_impl.first_frame_is_opaque : false; |
| } |
| |
| #ifdef __cplusplus |
| |
| inline void // |
| wuffs_base__image_config::set(wuffs_base__pixel_format pixfmt, |
| wuffs_base__pixel_subsampling pixsub, |
| uint32_t width, |
| uint32_t height, |
| uint64_t first_frame_io_position, |
| bool first_frame_is_opaque) { |
| wuffs_base__image_config__set(this, pixfmt, pixsub, width, height, |
| first_frame_io_position, first_frame_is_opaque); |
| } |
| |
| inline void // |
| wuffs_base__image_config::invalidate() { |
| wuffs_base__image_config__invalidate(this); |
| } |
| |
| inline bool // |
| wuffs_base__image_config::is_valid() const { |
| return wuffs_base__image_config__is_valid(this); |
| } |
| |
| inline uint64_t // |
| wuffs_base__image_config::first_frame_io_position() const { |
| return wuffs_base__image_config__first_frame_io_position(this); |
| } |
| |
| inline bool // |
| wuffs_base__image_config::first_frame_is_opaque() const { |
| return wuffs_base__image_config__first_frame_is_opaque(this); |
| } |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| // wuffs_base__animation_blend encodes, for an animated image, how to blend the |
| // transparent pixels of this frame with the existing canvas. In Porter-Duff |
| // compositing operator terminology: |
| // - 0 means the frame may be transparent, and should be blended "src over |
| // dst", also known as just "over". |
| // - 1 means the frame may be transparent, and should be blended "src". |
| // - 2 means the frame is completely opaque, so that "src over dst" and "src" |
| // are equivalent. |
| // |
| // These semantics are conservative. It is valid for a completely opaque frame |
| // to have a blend value other than 2. |
| typedef uint8_t wuffs_base__animation_blend; |
| |
| #define WUFFS_BASE__ANIMATION_BLEND__SRC_OVER_DST \ |
| ((wuffs_base__animation_blend)0) |
| #define WUFFS_BASE__ANIMATION_BLEND__SRC ((wuffs_base__animation_blend)1) |
| #define WUFFS_BASE__ANIMATION_BLEND__OPAQUE ((wuffs_base__animation_blend)2) |
| |
| // -------- |
| |
| // wuffs_base__animation_disposal encodes, for an animated image, how to |
| // dispose of a frame after displaying it: |
| // - None means to draw the next frame on top of this one. |
| // - Restore Background means to clear the frame's dirty rectangle to "the |
| // background color" (in practice, this means transparent black) before |
| // drawing the next frame. |
| // - Restore Previous means to undo the current frame, so that the next frame |
| // is drawn on top of the previous one. |
| typedef uint8_t wuffs_base__animation_disposal; |
| |
| #define WUFFS_BASE__ANIMATION_DISPOSAL__NONE ((wuffs_base__animation_disposal)0) |
| #define WUFFS_BASE__ANIMATION_DISPOSAL__RESTORE_BACKGROUND \ |
| ((wuffs_base__animation_disposal)1) |
| #define WUFFS_BASE__ANIMATION_DISPOSAL__RESTORE_PREVIOUS \ |
| ((wuffs_base__animation_disposal)2) |
| |
| // -------- |
| |
| typedef struct { |
| // Do not access the private_impl's fields directly. There is no API/ABI |
| // compatibility or safety guarantee if you do so. |
| struct { |
| wuffs_base__rect_ie_u32 bounds; |
| wuffs_base__flicks duration; |
| uint64_t index; |
| uint64_t io_position; |
| wuffs_base__animation_blend blend; |
| wuffs_base__animation_disposal disposal; |
| wuffs_base__color_u32_argb_premul background_color; |
| } private_impl; |
| |
| #ifdef __cplusplus |
| inline void update(wuffs_base__rect_ie_u32 bounds, |
| wuffs_base__flicks duration, |
| uint64_t index, |
| uint64_t io_position, |
| wuffs_base__animation_blend blend, |
| wuffs_base__animation_disposal disposal, |
| wuffs_base__color_u32_argb_premul background_color); |
| inline wuffs_base__rect_ie_u32 bounds() const; |
| inline uint32_t width() const; |
| inline uint32_t height() const; |
| inline wuffs_base__flicks duration() const; |
| inline uint64_t index() const; |
| inline uint64_t io_position() const; |
| inline wuffs_base__animation_blend blend() const; |
| inline wuffs_base__animation_disposal disposal() const; |
| inline wuffs_base__color_u32_argb_premul background_color() const; |
| #endif // __cplusplus |
| |
| } wuffs_base__frame_config; |
| |
| static inline wuffs_base__frame_config // |
| wuffs_base__null_frame_config() { |
| wuffs_base__frame_config ret; |
| ret.private_impl.bounds = wuffs_base__make_rect_ie_u32(0, 0, 0, 0); |
| ret.private_impl.duration = 0; |
| ret.private_impl.index = 0; |
| ret.private_impl.io_position = 0; |
| ret.private_impl.blend = 0; |
| ret.private_impl.disposal = 0; |
| return ret; |
| } |
| |
| static inline void // |
| wuffs_base__frame_config__update( |
| wuffs_base__frame_config* c, |
| wuffs_base__rect_ie_u32 bounds, |
| wuffs_base__flicks duration, |
| uint64_t index, |
| uint64_t io_position, |
| wuffs_base__animation_blend blend, |
| wuffs_base__animation_disposal disposal, |
| wuffs_base__color_u32_argb_premul background_color) { |
| if (!c) { |
| return; |
| } |
| |
| c->private_impl.bounds = bounds; |
| c->private_impl.duration = duration; |
| c->private_impl.index = index; |
| c->private_impl.io_position = io_position; |
| c->private_impl.blend = blend; |
| c->private_impl.disposal = disposal; |
| c->private_impl.background_color = background_color; |
| } |
| |
| static inline wuffs_base__rect_ie_u32 // |
| wuffs_base__frame_config__bounds(const wuffs_base__frame_config* c) { |
| if (c) { |
| return c->private_impl.bounds; |
| } |
| |
| wuffs_base__rect_ie_u32 ret; |
| ret.min_incl_x = 0; |
| ret.min_incl_y = 0; |
| ret.max_excl_x = 0; |
| ret.max_excl_y = 0; |
| return ret; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__frame_config__width(const wuffs_base__frame_config* c) { |
| return c ? wuffs_base__rect_ie_u32__width(&c->private_impl.bounds) : 0; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__frame_config__height(const wuffs_base__frame_config* c) { |
| return c ? wuffs_base__rect_ie_u32__height(&c->private_impl.bounds) : 0; |
| } |
| |
| // wuffs_base__frame_config__duration returns the amount of time to display |
| // this frame. Zero means to display forever - a still (non-animated) image. |
| static inline wuffs_base__flicks // |
| wuffs_base__frame_config__duration(const wuffs_base__frame_config* c) { |
| return c ? c->private_impl.duration : 0; |
| } |
| |
| // wuffs_base__frame_config__index returns the index of this frame. The first |
| // frame in an image has index 0, the second frame has index 1, and so on. |
| static inline uint64_t // |
| wuffs_base__frame_config__index(const wuffs_base__frame_config* c) { |
| return c ? c->private_impl.index : 0; |
| } |
| |
| // wuffs_base__frame_config__io_position returns the I/O stream position before |
| // the frame config. |
| static inline uint64_t // |
| wuffs_base__frame_config__io_position(const wuffs_base__frame_config* c) { |
| return c ? c->private_impl.io_position : 0; |
| } |
| |
| // wuffs_base__frame_config__blend returns, for an animated image, how to blend |
| // the transparent pixels of this frame with the existing canvas. |
| static inline wuffs_base__animation_blend // |
| wuffs_base__frame_config__blend(const wuffs_base__frame_config* c) { |
| return c ? c->private_impl.blend : 0; |
| } |
| |
| // wuffs_base__frame_config__disposal returns, for an animated image, how to |
| // dispose of this frame after displaying it. |
| static inline wuffs_base__animation_disposal // |
| wuffs_base__frame_config__disposal(const wuffs_base__frame_config* c) { |
| return c ? c->private_impl.disposal : 0; |
| } |
| |
| static inline wuffs_base__color_u32_argb_premul // |
| wuffs_base__frame_config__background_color(const wuffs_base__frame_config* c) { |
| return c ? c->private_impl.background_color : 0; |
| } |
| |
| #ifdef __cplusplus |
| |
| inline void // |
| wuffs_base__frame_config::update( |
| wuffs_base__rect_ie_u32 bounds, |
| wuffs_base__flicks duration, |
| uint64_t index, |
| uint64_t io_position, |
| wuffs_base__animation_blend blend, |
| wuffs_base__animation_disposal disposal, |
| wuffs_base__color_u32_argb_premul background_color) { |
| wuffs_base__frame_config__update(this, bounds, duration, index, io_position, |
| blend, disposal, background_color); |
| } |
| |
| inline wuffs_base__rect_ie_u32 // |
| wuffs_base__frame_config::bounds() const { |
| return wuffs_base__frame_config__bounds(this); |
| } |
| |
| inline uint32_t // |
| wuffs_base__frame_config::width() const { |
| return wuffs_base__frame_config__width(this); |
| } |
| |
| inline uint32_t // |
| wuffs_base__frame_config::height() const { |
| return wuffs_base__frame_config__height(this); |
| } |
| |
| inline wuffs_base__flicks // |
| wuffs_base__frame_config::duration() const { |
| return wuffs_base__frame_config__duration(this); |
| } |
| |
| inline uint64_t // |
| wuffs_base__frame_config::index() const { |
| return wuffs_base__frame_config__index(this); |
| } |
| |
| inline uint64_t // |
| wuffs_base__frame_config::io_position() const { |
| return wuffs_base__frame_config__io_position(this); |
| } |
| |
| inline wuffs_base__animation_blend // |
| wuffs_base__frame_config::blend() const { |
| return wuffs_base__frame_config__blend(this); |
| } |
| |
| inline wuffs_base__animation_disposal // |
| wuffs_base__frame_config::disposal() const { |
| return wuffs_base__frame_config__disposal(this); |
| } |
| |
| inline wuffs_base__color_u32_argb_premul // |
| wuffs_base__frame_config::background_color() const { |
| return wuffs_base__frame_config__background_color(this); |
| } |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| typedef struct { |
| wuffs_base__pixel_config pixcfg; |
| |
| // Do not access the private_impl's fields directly. There is no API/ABI |
| // compatibility or safety guarantee if you do so. |
| struct { |
| wuffs_base__table_u8 planes[WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX]; |
| // TODO: color spaces. |
| } private_impl; |
| |
| #ifdef __cplusplus |
| inline wuffs_base__status set_from_slice( |
| const wuffs_base__pixel_config* pixcfg, |
| wuffs_base__slice_u8 pixbuf_memory); |
| inline wuffs_base__status set_from_table( |
| const wuffs_base__pixel_config* pixcfg, |
| wuffs_base__table_u8 pixbuf_memory); |
| inline wuffs_base__slice_u8 palette(); |
| inline wuffs_base__pixel_format pixel_format() const; |
| inline wuffs_base__table_u8 plane(uint32_t p); |
| #endif // __cplusplus |
| |
| } wuffs_base__pixel_buffer; |
| |
| static inline wuffs_base__pixel_buffer // |
| wuffs_base__null_pixel_buffer() { |
| wuffs_base__pixel_buffer ret; |
| ret.pixcfg = wuffs_base__null_pixel_config(); |
| ret.private_impl.planes[0] = wuffs_base__empty_table_u8(); |
| ret.private_impl.planes[1] = wuffs_base__empty_table_u8(); |
| ret.private_impl.planes[2] = wuffs_base__empty_table_u8(); |
| ret.private_impl.planes[3] = wuffs_base__empty_table_u8(); |
| return ret; |
| } |
| |
| static inline wuffs_base__status // |
| wuffs_base__pixel_buffer__set_from_slice(wuffs_base__pixel_buffer* b, |
| const wuffs_base__pixel_config* pixcfg, |
| wuffs_base__slice_u8 pixbuf_memory) { |
| if (!b) { |
| return wuffs_base__error__bad_receiver; |
| } |
| memset(b, 0, sizeof(*b)); |
| if (!pixcfg) { |
| return wuffs_base__error__bad_argument; |
| } |
| if (wuffs_base__pixel_format__is_planar(pixcfg->private_impl.pixfmt)) { |
| // TODO: support planar pixel formats, concious of pixel subsampling. |
| return wuffs_base__error__unsupported_option; |
| } |
| uint32_t bits_per_pixel = |
| wuffs_base__pixel_format__bits_per_pixel(pixcfg->private_impl.pixfmt); |
| if ((bits_per_pixel == 0) || ((bits_per_pixel % 8) != 0)) { |
| // TODO: support fraction-of-byte pixels, e.g. 1 bit per pixel? |
| return wuffs_base__error__unsupported_option; |
| } |
| uint64_t bytes_per_pixel = bits_per_pixel / 8; |
| |
| uint8_t* ptr = pixbuf_memory.ptr; |
| uint64_t len = pixbuf_memory.len; |
| if (wuffs_base__pixel_format__is_indexed(pixcfg->private_impl.pixfmt)) { |
| // Split a 1024 byte chunk (256 palette entries × 4 bytes per entry) from |
| // the start of pixbuf_memory. We split from the start, not the end, so |
| // that the both chunks' pointers have the same alignment as the original |
| // pointer, up to an alignment of 1024. |
| if (len < 1024) { |
| return wuffs_base__error__bad_argument_length_too_short; |
| } |
| wuffs_base__table_u8* tab = |
| &b->private_impl.planes[WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE]; |
| tab->ptr = ptr; |
| tab->width = 1024; |
| tab->height = 1; |
| tab->stride = 1024; |
| ptr += 1024; |
| len -= 1024; |
| } |
| |
| uint64_t wh = ((uint64_t)pixcfg->private_impl.width) * |
| ((uint64_t)pixcfg->private_impl.height); |
| size_t width = (size_t)(pixcfg->private_impl.width); |
| if ((wh > (UINT64_MAX / bytes_per_pixel)) || |
| (width > (SIZE_MAX / bytes_per_pixel))) { |
| return wuffs_base__error__bad_argument; |
| } |
| wh *= bytes_per_pixel; |
| width *= bytes_per_pixel; |
| if (wh > len) { |
| return wuffs_base__error__bad_argument_length_too_short; |
| } |
| |
| b->pixcfg = *pixcfg; |
| wuffs_base__table_u8* tab = &b->private_impl.planes[0]; |
| tab->ptr = ptr; |
| tab->width = width; |
| tab->height = pixcfg->private_impl.height; |
| tab->stride = width; |
| return NULL; |
| } |
| |
| static inline wuffs_base__status // |
| wuffs_base__pixel_buffer__set_from_table(wuffs_base__pixel_buffer* b, |
| const wuffs_base__pixel_config* pixcfg, |
| wuffs_base__table_u8 pixbuf_memory) { |
| if (!b) { |
| return wuffs_base__error__bad_receiver; |
| } |
| memset(b, 0, sizeof(*b)); |
| if (!pixcfg || |
| wuffs_base__pixel_format__is_planar(pixcfg->private_impl.pixfmt)) { |
| return wuffs_base__error__bad_argument; |
| } |
| uint32_t bits_per_pixel = |
| wuffs_base__pixel_format__bits_per_pixel(pixcfg->private_impl.pixfmt); |
| if ((bits_per_pixel == 0) || ((bits_per_pixel % 8) != 0)) { |
| // TODO: support fraction-of-byte pixels, e.g. 1 bit per pixel? |
| return wuffs_base__error__unsupported_option; |
| } |
| uint64_t bytes_per_pixel = bits_per_pixel / 8; |
| |
| uint64_t width_in_bytes = |
| ((uint64_t)pixcfg->private_impl.width) * bytes_per_pixel; |
| if ((width_in_bytes > pixbuf_memory.width) || |
| (pixcfg->private_impl.height > pixbuf_memory.height)) { |
| return wuffs_base__error__bad_argument; |
| } |
| |
| b->pixcfg = *pixcfg; |
| b->private_impl.planes[0] = pixbuf_memory; |
| return NULL; |
| } |
| |
| // wuffs_base__pixel_buffer__palette returns the palette color data. If |
| // non-empty, it will have length 1024. |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__pixel_buffer__palette(wuffs_base__pixel_buffer* b) { |
| if (b && |
| wuffs_base__pixel_format__is_indexed(b->pixcfg.private_impl.pixfmt)) { |
| wuffs_base__table_u8* tab = |
| &b->private_impl.planes[WUFFS_BASE__PIXEL_FORMAT__INDEXED__COLOR_PLANE]; |
| if ((tab->width == 1024) && (tab->height == 1)) { |
| return wuffs_base__make_slice_u8(tab->ptr, 1024); |
| } |
| } |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| |
| static inline wuffs_base__pixel_format // |
| wuffs_base__pixel_buffer__pixel_format(const wuffs_base__pixel_buffer* b) { |
| if (b) { |
| return b->pixcfg.private_impl.pixfmt; |
| } |
| return WUFFS_BASE__PIXEL_FORMAT__INVALID; |
| } |
| |
| static inline wuffs_base__table_u8 // |
| wuffs_base__pixel_buffer__plane(wuffs_base__pixel_buffer* b, uint32_t p) { |
| if (b && (p < WUFFS_BASE__PIXEL_FORMAT__NUM_PLANES_MAX)) { |
| return b->private_impl.planes[p]; |
| } |
| |
| wuffs_base__table_u8 ret; |
| ret.ptr = NULL; |
| ret.width = 0; |
| ret.height = 0; |
| ret.stride = 0; |
| return ret; |
| } |
| |
| #ifdef __cplusplus |
| |
| inline wuffs_base__status // |
| wuffs_base__pixel_buffer::set_from_slice(const wuffs_base__pixel_config* pixcfg, |
| wuffs_base__slice_u8 pixbuf_memory) { |
| return wuffs_base__pixel_buffer__set_from_slice(this, pixcfg, pixbuf_memory); |
| } |
| |
| inline wuffs_base__status // |
| wuffs_base__pixel_buffer::set_from_table(const wuffs_base__pixel_config* pixcfg, |
| wuffs_base__table_u8 pixbuf_memory) { |
| return wuffs_base__pixel_buffer__set_from_table(this, pixcfg, pixbuf_memory); |
| } |
| |
| inline wuffs_base__slice_u8 // |
| wuffs_base__pixel_buffer::palette() { |
| return wuffs_base__pixel_buffer__palette(this); |
| } |
| |
| inline wuffs_base__pixel_format // |
| wuffs_base__pixel_buffer::pixel_format() const { |
| return wuffs_base__pixel_buffer__pixel_format(this); |
| } |
| |
| inline wuffs_base__table_u8 // |
| wuffs_base__pixel_buffer::plane(uint32_t p) { |
| return wuffs_base__pixel_buffer__plane(this, p); |
| } |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| typedef struct { |
| // Do not access the private_impl's fields directly. There is no API/ABI |
| // compatibility or safety guarantee if you do so. |
| struct { |
| uint8_t TODO; |
| } private_impl; |
| |
| #ifdef __cplusplus |
| #endif // __cplusplus |
| |
| } wuffs_base__decode_frame_options; |
| |
| #ifdef __cplusplus |
| |
| #endif // __cplusplus |
| |
| // -------- |
| |
| typedef struct { |
| // Do not access the private_impl's fields directly. There is no API/ABI |
| // compatibility or safety guarantee if you do so. |
| struct { |
| // TODO: should the func type take restrict pointers? |
| uint64_t (*func)(wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__slice_u8 src); |
| } private_impl; |
| |
| #ifdef __cplusplus |
| inline wuffs_base__status prepare(wuffs_base__pixel_format dst_format, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__pixel_format src_format, |
| wuffs_base__slice_u8 src_palette); |
| inline uint64_t swizzle_interleaved(wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__slice_u8 src) const; |
| #endif // __cplusplus |
| |
| } wuffs_base__pixel_swizzler; |
| |
| wuffs_base__status // |
| wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p, |
| wuffs_base__pixel_format dst_format, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__pixel_format src_format, |
| wuffs_base__slice_u8 src_palette); |
| |
| uint64_t // |
| wuffs_base__pixel_swizzler__swizzle_interleaved( |
| const wuffs_base__pixel_swizzler* p, |
| wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__slice_u8 src); |
| |
| #ifdef __cplusplus |
| |
| inline wuffs_base__status // |
| wuffs_base__pixel_swizzler::prepare(wuffs_base__pixel_format dst_format, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__pixel_format src_format, |
| wuffs_base__slice_u8 src_palette) { |
| return wuffs_base__pixel_swizzler__prepare(this, dst_format, dst_palette, |
| src_format, src_palette); |
| } |
| |
| uint64_t // |
| wuffs_base__pixel_swizzler::swizzle_interleaved( |
| wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__slice_u8 src) const { |
| return wuffs_base__pixel_swizzler__swizzle_interleaved(this, dst, dst_palette, |
| src); |
| } |
| |
| #endif // __cplusplus |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #ifdef __clang__ |
| #pragma clang diagnostic pop |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| // ---------------- Status Codes |
| |
| // ---------------- Public Consts |
| |
| // ---------------- Struct Declarations |
| |
| typedef struct wuffs_adler32__hasher__struct wuffs_adler32__hasher; |
| |
| // ---------------- Public Initializer Prototypes |
| |
| // For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self, |
| // etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)". |
| // |
| // Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version. |
| // Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for initialize_flags. |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_adler32__hasher__initialize(wuffs_adler32__hasher* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags); |
| |
| size_t // |
| sizeof__wuffs_adler32__hasher(); |
| |
| // ---------------- Public Function Prototypes |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_adler32__hasher__update_u32(wuffs_adler32__hasher* self, |
| wuffs_base__slice_u8 a_x); |
| |
| // ---------------- Struct Definitions |
| |
| // These structs' fields, and the sizeof them, are private implementation |
| // details that aren't guaranteed to be stable across Wuffs versions. |
| // |
| // See https://en.wikipedia.org/wiki/Opaque_pointer#C |
| |
| #if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| struct wuffs_adler32__hasher__struct { |
| #ifdef WUFFS_IMPLEMENTATION |
| |
| // Do not access the private_impl's or private_data's fields directly. There |
| // is no API/ABI compatibility or safety guarantee if you do so. Instead, use |
| // the wuffs_foo__bar__baz functions. |
| // |
| // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct |
| // can be stack allocated when WUFFS_IMPLEMENTATION is defined. |
| |
| struct { |
| uint32_t magic; |
| uint32_t active_coroutine; |
| |
| uint32_t f_state; |
| bool f_started; |
| |
| } private_impl; |
| |
| #else // WUFFS_IMPLEMENTATION |
| |
| // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is |
| // large enough to discourage trying to allocate one on the stack. The sizeof |
| // the real private_impl (and the sizeof the real outermost wuffs_foo__bar |
| // struct) is not part of the public, stable, memory-safe API. Call |
| // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their |
| // first argument) instead of fiddling with bar.private_impl.qux fields. |
| // |
| // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still |
| // defines C++ convenience methods. These methods forward on "this", so that |
| // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". |
| private: |
| union { |
| uint32_t align_as_per_magic_field; |
| uint8_t placeholder[1073741824]; // 1 GiB. |
| } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; |
| |
| public: |
| |
| #endif // WUFFS_IMPLEMENTATION |
| |
| #ifdef __cplusplus |
| |
| inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| initialize(size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| return wuffs_adler32__hasher__initialize(this, sizeof_star_self, |
| wuffs_version, initialize_flags); |
| } |
| |
| inline uint32_t // |
| update_u32(wuffs_base__slice_u8 a_x) { |
| return wuffs_adler32__hasher__update_u32(this, a_x); |
| } |
| |
| #if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| // Disallow copy and assign. |
| wuffs_adler32__hasher__struct(const wuffs_adler32__hasher__struct&) = delete; |
| wuffs_adler32__hasher__struct& operator=( |
| const wuffs_adler32__hasher__struct&) = delete; |
| #endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| |
| #endif // __cplusplus |
| |
| }; // struct wuffs_adler32__hasher__struct |
| |
| #endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| // ---------------- Status Codes |
| |
| // ---------------- Public Consts |
| |
| // ---------------- Struct Declarations |
| |
| typedef struct wuffs_crc32__ieee_hasher__struct wuffs_crc32__ieee_hasher; |
| |
| // ---------------- Public Initializer Prototypes |
| |
| // For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self, |
| // etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)". |
| // |
| // Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version. |
| // Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for initialize_flags. |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_crc32__ieee_hasher__initialize(wuffs_crc32__ieee_hasher* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags); |
| |
| size_t // |
| sizeof__wuffs_crc32__ieee_hasher(); |
| |
| // ---------------- Public Function Prototypes |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_crc32__ieee_hasher__update_u32(wuffs_crc32__ieee_hasher* self, |
| wuffs_base__slice_u8 a_x); |
| |
| // ---------------- Struct Definitions |
| |
| // These structs' fields, and the sizeof them, are private implementation |
| // details that aren't guaranteed to be stable across Wuffs versions. |
| // |
| // See https://en.wikipedia.org/wiki/Opaque_pointer#C |
| |
| #if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| struct wuffs_crc32__ieee_hasher__struct { |
| #ifdef WUFFS_IMPLEMENTATION |
| |
| // Do not access the private_impl's or private_data's fields directly. There |
| // is no API/ABI compatibility or safety guarantee if you do so. Instead, use |
| // the wuffs_foo__bar__baz functions. |
| // |
| // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct |
| // can be stack allocated when WUFFS_IMPLEMENTATION is defined. |
| |
| struct { |
| uint32_t magic; |
| uint32_t active_coroutine; |
| |
| uint32_t f_state; |
| |
| } private_impl; |
| |
| #else // WUFFS_IMPLEMENTATION |
| |
| // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is |
| // large enough to discourage trying to allocate one on the stack. The sizeof |
| // the real private_impl (and the sizeof the real outermost wuffs_foo__bar |
| // struct) is not part of the public, stable, memory-safe API. Call |
| // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their |
| // first argument) instead of fiddling with bar.private_impl.qux fields. |
| // |
| // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still |
| // defines C++ convenience methods. These methods forward on "this", so that |
| // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". |
| private: |
| union { |
| uint32_t align_as_per_magic_field; |
| uint8_t placeholder[1073741824]; // 1 GiB. |
| } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; |
| |
| public: |
| |
| #endif // WUFFS_IMPLEMENTATION |
| |
| #ifdef __cplusplus |
| |
| inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| initialize(size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| return wuffs_crc32__ieee_hasher__initialize( |
| this, sizeof_star_self, wuffs_version, initialize_flags); |
| } |
| |
| inline uint32_t // |
| update_u32(wuffs_base__slice_u8 a_x) { |
| return wuffs_crc32__ieee_hasher__update_u32(this, a_x); |
| } |
| |
| #if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| // Disallow copy and assign. |
| wuffs_crc32__ieee_hasher__struct(const wuffs_crc32__ieee_hasher__struct&) = |
| delete; |
| wuffs_crc32__ieee_hasher__struct& operator=( |
| const wuffs_crc32__ieee_hasher__struct&) = delete; |
| #endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| |
| #endif // __cplusplus |
| |
| }; // struct wuffs_crc32__ieee_hasher__struct |
| |
| #endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| // ---------------- Status Codes |
| |
| extern const char* wuffs_deflate__error__bad_huffman_code_over_subscribed; |
| extern const char* wuffs_deflate__error__bad_huffman_code_under_subscribed; |
| extern const char* wuffs_deflate__error__bad_huffman_code_length_count; |
| extern const char* wuffs_deflate__error__bad_huffman_code_length_repetition; |
| extern const char* wuffs_deflate__error__bad_huffman_code; |
| extern const char* wuffs_deflate__error__bad_huffman_minimum_code_length; |
| extern const char* wuffs_deflate__error__bad_block; |
| extern const char* wuffs_deflate__error__bad_distance; |
| extern const char* wuffs_deflate__error__bad_distance_code_count; |
| extern const char* wuffs_deflate__error__bad_literal_length_code_count; |
| extern const char* wuffs_deflate__error__inconsistent_stored_block_length; |
| extern const char* wuffs_deflate__error__missing_end_of_block_code; |
| extern const char* wuffs_deflate__error__no_huffman_codes; |
| |
| // ---------------- Public Consts |
| |
| #define WUFFS_DEFLATE__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1 |
| |
| // ---------------- Struct Declarations |
| |
| typedef struct wuffs_deflate__decoder__struct wuffs_deflate__decoder; |
| |
| // ---------------- Public Initializer Prototypes |
| |
| // For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self, |
| // etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)". |
| // |
| // Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version. |
| // Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for initialize_flags. |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_deflate__decoder__initialize(wuffs_deflate__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags); |
| |
| size_t // |
| sizeof__wuffs_deflate__decoder(); |
| |
| // ---------------- Public Function Prototypes |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_deflate__decoder__add_history(wuffs_deflate__decoder* self, |
| wuffs_base__slice_u8 a_hist); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_deflate__decoder__workbuf_len(const wuffs_deflate__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_deflate__decoder__decode_io_writer(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf); |
| |
| // ---------------- Struct Definitions |
| |
| // These structs' fields, and the sizeof them, are private implementation |
| // details that aren't guaranteed to be stable across Wuffs versions. |
| // |
| // See https://en.wikipedia.org/wiki/Opaque_pointer#C |
| |
| #if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| struct wuffs_deflate__decoder__struct { |
| #ifdef WUFFS_IMPLEMENTATION |
| |
| // Do not access the private_impl's or private_data's fields directly. There |
| // is no API/ABI compatibility or safety guarantee if you do so. Instead, use |
| // the wuffs_foo__bar__baz functions. |
| // |
| // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct |
| // can be stack allocated when WUFFS_IMPLEMENTATION is defined. |
| |
| struct { |
| uint32_t magic; |
| uint32_t active_coroutine; |
| |
| uint32_t f_bits; |
| uint32_t f_n_bits; |
| uint32_t f_history_index; |
| uint32_t f_n_huffs_bits[2]; |
| bool f_end_of_block; |
| |
| uint32_t p_decode_io_writer[1]; |
| uint32_t p_decode_blocks[1]; |
| uint32_t p_decode_uncompressed[1]; |
| uint32_t p_init_dynamic_huffman[1]; |
| uint32_t p_decode_huffman_slow[1]; |
| } private_impl; |
| |
| struct { |
| uint32_t f_huffs[2][1024]; |
| uint8_t f_history[32768]; |
| uint8_t f_code_lengths[320]; |
| |
| struct { |
| uint32_t v_final; |
| } s_decode_blocks[1]; |
| struct { |
| uint32_t v_length; |
| uint64_t scratch; |
| } s_decode_uncompressed[1]; |
| struct { |
| uint32_t v_bits; |
| uint32_t v_n_bits; |
| uint32_t v_n_lit; |
| uint32_t v_n_dist; |
| uint32_t v_n_clen; |
| uint32_t v_i; |
| uint32_t v_mask; |
| uint32_t v_table_entry; |
| uint32_t v_n_extra_bits; |
| uint8_t v_rep_symbol; |
| uint32_t v_rep_count; |
| } s_init_dynamic_huffman[1]; |
| struct { |
| uint32_t v_bits; |
| uint32_t v_n_bits; |
| uint32_t v_table_entry; |
| uint32_t v_table_entry_n_bits; |
| uint32_t v_lmask; |
| uint32_t v_dmask; |
| uint32_t v_redir_top; |
| uint32_t v_redir_mask; |
| uint32_t v_length; |
| uint32_t v_dist_minus_1; |
| uint32_t v_hlen; |
| uint32_t v_hdist; |
| } s_decode_huffman_slow[1]; |
| } private_data; |
| |
| #else // WUFFS_IMPLEMENTATION |
| |
| // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is |
| // large enough to discourage trying to allocate one on the stack. The sizeof |
| // the real private_impl (and the sizeof the real outermost wuffs_foo__bar |
| // struct) is not part of the public, stable, memory-safe API. Call |
| // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their |
| // first argument) instead of fiddling with bar.private_impl.qux fields. |
| // |
| // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still |
| // defines C++ convenience methods. These methods forward on "this", so that |
| // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". |
| private: |
| union { |
| uint32_t align_as_per_magic_field; |
| uint8_t placeholder[1073741824]; // 1 GiB. |
| } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; |
| |
| public: |
| |
| #endif // WUFFS_IMPLEMENTATION |
| |
| #ifdef __cplusplus |
| |
| inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| initialize(size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| return wuffs_deflate__decoder__initialize(this, sizeof_star_self, |
| wuffs_version, initialize_flags); |
| } |
| |
| inline wuffs_base__empty_struct // |
| add_history(wuffs_base__slice_u8 a_hist) { |
| return wuffs_deflate__decoder__add_history(this, a_hist); |
| } |
| |
| inline wuffs_base__range_ii_u64 // |
| workbuf_len() const { |
| return wuffs_deflate__decoder__workbuf_len(this); |
| } |
| |
| inline wuffs_base__status // |
| decode_io_writer(wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf) { |
| return wuffs_deflate__decoder__decode_io_writer(this, a_dst, a_src, |
| a_workbuf); |
| } |
| |
| #if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| // Disallow copy and assign. |
| wuffs_deflate__decoder__struct(const wuffs_deflate__decoder__struct&) = |
| delete; |
| wuffs_deflate__decoder__struct& operator=( |
| const wuffs_deflate__decoder__struct&) = delete; |
| #endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| |
| #endif // __cplusplus |
| |
| }; // struct wuffs_deflate__decoder__struct |
| |
| #endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| // ---------------- Status Codes |
| |
| extern const char* wuffs_lzw__error__bad_code; |
| |
| // ---------------- Public Consts |
| |
| #define WUFFS_LZW__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 0 |
| |
| // ---------------- Struct Declarations |
| |
| typedef struct wuffs_lzw__decoder__struct wuffs_lzw__decoder; |
| |
| // ---------------- Public Initializer Prototypes |
| |
| // For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self, |
| // etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)". |
| // |
| // Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version. |
| // Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for initialize_flags. |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_lzw__decoder__initialize(wuffs_lzw__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags); |
| |
| size_t // |
| sizeof__wuffs_lzw__decoder(); |
| |
| // ---------------- Public Function Prototypes |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_lzw__decoder__set_literal_width(wuffs_lzw__decoder* self, uint32_t a_lw); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_lzw__decoder__workbuf_len(const wuffs_lzw__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_lzw__decoder__decode_io_writer(wuffs_lzw__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__slice_u8 // |
| wuffs_lzw__decoder__flush(wuffs_lzw__decoder* self); |
| |
| // ---------------- Struct Definitions |
| |
| // These structs' fields, and the sizeof them, are private implementation |
| // details that aren't guaranteed to be stable across Wuffs versions. |
| // |
| // See https://en.wikipedia.org/wiki/Opaque_pointer#C |
| |
| #if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| struct wuffs_lzw__decoder__struct { |
| #ifdef WUFFS_IMPLEMENTATION |
| |
| // Do not access the private_impl's or private_data's fields directly. There |
| // is no API/ABI compatibility or safety guarantee if you do so. Instead, use |
| // the wuffs_foo__bar__baz functions. |
| // |
| // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct |
| // can be stack allocated when WUFFS_IMPLEMENTATION is defined. |
| |
| struct { |
| uint32_t magic; |
| uint32_t active_coroutine; |
| |
| uint32_t f_set_literal_width_arg; |
| uint32_t f_literal_width; |
| uint32_t f_clear_code; |
| uint32_t f_end_code; |
| uint32_t f_save_code; |
| uint32_t f_prev_code; |
| uint32_t f_width; |
| uint32_t f_bits; |
| uint32_t f_n_bits; |
| uint32_t f_output_ri; |
| uint32_t f_output_wi; |
| uint32_t f_read_from_return_value; |
| uint16_t f_prefixes[4096]; |
| |
| uint32_t p_decode_io_writer[1]; |
| uint32_t p_write_to[1]; |
| } private_impl; |
| |
| struct { |
| uint8_t f_suffixes[4096][8]; |
| uint16_t f_lm1s[4096]; |
| uint8_t f_output[8199]; |
| |
| } private_data; |
| |
| #else // WUFFS_IMPLEMENTATION |
| |
| // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is |
| // large enough to discourage trying to allocate one on the stack. The sizeof |
| // the real private_impl (and the sizeof the real outermost wuffs_foo__bar |
| // struct) is not part of the public, stable, memory-safe API. Call |
| // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their |
| // first argument) instead of fiddling with bar.private_impl.qux fields. |
| // |
| // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still |
| // defines C++ convenience methods. These methods forward on "this", so that |
| // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". |
| private: |
| union { |
| uint32_t align_as_per_magic_field; |
| uint8_t placeholder[1073741824]; // 1 GiB. |
| } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; |
| |
| public: |
| |
| #endif // WUFFS_IMPLEMENTATION |
| |
| #ifdef __cplusplus |
| |
| inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| initialize(size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| return wuffs_lzw__decoder__initialize(this, sizeof_star_self, wuffs_version, |
| initialize_flags); |
| } |
| |
| inline wuffs_base__empty_struct // |
| set_literal_width(uint32_t a_lw) { |
| return wuffs_lzw__decoder__set_literal_width(this, a_lw); |
| } |
| |
| inline wuffs_base__range_ii_u64 // |
| workbuf_len() const { |
| return wuffs_lzw__decoder__workbuf_len(this); |
| } |
| |
| inline wuffs_base__status // |
| decode_io_writer(wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf) { |
| return wuffs_lzw__decoder__decode_io_writer(this, a_dst, a_src, a_workbuf); |
| } |
| |
| inline wuffs_base__slice_u8 // |
| flush() { |
| return wuffs_lzw__decoder__flush(this); |
| } |
| |
| #if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| // Disallow copy and assign. |
| wuffs_lzw__decoder__struct(const wuffs_lzw__decoder__struct&) = delete; |
| wuffs_lzw__decoder__struct& operator=(const wuffs_lzw__decoder__struct&) = |
| delete; |
| #endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| |
| #endif // __cplusplus |
| |
| }; // struct wuffs_lzw__decoder__struct |
| |
| #endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| // ---------------- Status Codes |
| |
| extern const char* wuffs_gif__error__bad_block; |
| extern const char* wuffs_gif__error__bad_extension_label; |
| extern const char* wuffs_gif__error__bad_frame_size; |
| extern const char* wuffs_gif__error__bad_graphic_control; |
| extern const char* wuffs_gif__error__bad_header; |
| extern const char* wuffs_gif__error__bad_literal_width; |
| extern const char* wuffs_gif__error__bad_palette; |
| |
| // ---------------- Public Consts |
| |
| #define WUFFS_GIF__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1 |
| |
| #define WUFFS_GIF__QUIRK_DELAY_NUM_DECODED_FRAMES 1041635328 |
| |
| #define WUFFS_GIF__QUIRK_FIRST_FRAME_LOCAL_PALETTE_MEANS_BLACK_BACKGROUND \ |
| 1041635329 |
| |
| #define WUFFS_GIF__QUIRK_HONOR_BACKGROUND_COLOR 1041635330 |
| |
| #define WUFFS_GIF__QUIRK_IGNORE_TOO_MUCH_PIXEL_DATA 1041635331 |
| |
| #define WUFFS_GIF__QUIRK_IMAGE_BOUNDS_ARE_STRICT 1041635332 |
| |
| #define WUFFS_GIF__QUIRK_REJECT_EMPTY_FRAME 1041635333 |
| |
| #define WUFFS_GIF__QUIRK_REJECT_EMPTY_PALETTE 1041635334 |
| |
| // ---------------- Struct Declarations |
| |
| typedef struct wuffs_gif__decoder__struct wuffs_gif__decoder; |
| |
| // ---------------- Public Initializer Prototypes |
| |
| // For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self, |
| // etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)". |
| // |
| // Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version. |
| // Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for initialize_flags. |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_gif__decoder__initialize(wuffs_gif__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags); |
| |
| size_t // |
| sizeof__wuffs_gif__decoder(); |
| |
| // ---------------- Public Function Prototypes |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_gif__decoder__set_quirk_enabled(wuffs_gif__decoder* self, |
| uint32_t a_quirk, |
| bool a_enabled); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__decode_image_config(wuffs_gif__decoder* self, |
| wuffs_base__image_config* a_dst, |
| wuffs_base__io_buffer* a_src); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_gif__decoder__set_report_metadata(wuffs_gif__decoder* self, |
| uint32_t a_fourcc, |
| bool a_report); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__ack_metadata_chunk(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_gif__decoder__metadata_fourcc(const wuffs_gif__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC uint64_t // |
| wuffs_gif__decoder__metadata_chunk_length(const wuffs_gif__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_gif__decoder__num_animation_loops(const wuffs_gif__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC uint64_t // |
| wuffs_gif__decoder__num_decoded_frame_configs(const wuffs_gif__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC uint64_t // |
| wuffs_gif__decoder__num_decoded_frames(const wuffs_gif__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32 // |
| wuffs_gif__decoder__frame_dirty_rect(const wuffs_gif__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_gif__decoder__workbuf_len(const wuffs_gif__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__restart_frame(wuffs_gif__decoder* self, |
| uint64_t a_index, |
| uint64_t a_io_position); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__decode_frame_config(wuffs_gif__decoder* self, |
| wuffs_base__frame_config* a_dst, |
| wuffs_base__io_buffer* a_src); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__decode_frame(wuffs_gif__decoder* self, |
| wuffs_base__pixel_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf, |
| wuffs_base__decode_frame_options* a_opts); |
| |
| // ---------------- Struct Definitions |
| |
| // These structs' fields, and the sizeof them, are private implementation |
| // details that aren't guaranteed to be stable across Wuffs versions. |
| // |
| // See https://en.wikipedia.org/wiki/Opaque_pointer#C |
| |
| #if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| struct wuffs_gif__decoder__struct { |
| #ifdef WUFFS_IMPLEMENTATION |
| |
| // Do not access the private_impl's or private_data's fields directly. There |
| // is no API/ABI compatibility or safety guarantee if you do so. Instead, use |
| // the wuffs_foo__bar__baz functions. |
| // |
| // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct |
| // can be stack allocated when WUFFS_IMPLEMENTATION is defined. |
| |
| struct { |
| uint32_t magic; |
| uint32_t active_coroutine; |
| |
| uint32_t f_width; |
| uint32_t f_height; |
| uint8_t f_call_sequence; |
| bool f_ignore_metadata; |
| bool f_report_metadata_iccp; |
| bool f_report_metadata_xmp; |
| uint32_t f_metadata_fourcc_value; |
| uint64_t f_metadata_chunk_length_value; |
| uint64_t f_metadata_io_position; |
| bool f_quirk_enabled_delay_num_decoded_frames; |
| bool f_quirk_enabled_first_frame_local_palette_means_black_background; |
| bool f_quirk_enabled_honor_background_color; |
| bool f_quirk_enabled_ignore_too_much_pixel_data; |
| bool f_quirk_enabled_image_bounds_are_strict; |
| bool f_quirk_enabled_reject_empty_frame; |
| bool f_quirk_enabled_reject_empty_palette; |
| bool f_delayed_num_decoded_frames; |
| bool f_end_of_data; |
| bool f_restarted; |
| bool f_previous_lzw_decode_ended_abruptly; |
| bool f_has_global_palette; |
| uint8_t f_interlace; |
| bool f_seen_num_loops; |
| uint32_t f_num_loops; |
| uint32_t f_background_color_u32_argb_premul; |
| uint32_t f_black_color_u32_argb_premul; |
| bool f_gc_has_transparent_index; |
| uint8_t f_gc_transparent_index; |
| uint8_t f_gc_disposal; |
| uint64_t f_gc_duration; |
| uint64_t f_frame_config_io_position; |
| uint64_t f_num_decoded_frame_configs_value; |
| uint64_t f_num_decoded_frames_value; |
| uint32_t f_frame_rect_x0; |
| uint32_t f_frame_rect_y0; |
| uint32_t f_frame_rect_x1; |
| uint32_t f_frame_rect_y1; |
| uint32_t f_dst_x; |
| uint32_t f_dst_y; |
| uint32_t f_dirty_max_excl_y; |
| uint64_t f_compressed_ri; |
| uint64_t f_compressed_wi; |
| wuffs_base__pixel_swizzler f_swizzler; |
| |
| uint32_t p_decode_image_config[1]; |
| uint32_t p_ack_metadata_chunk[1]; |
| uint32_t p_decode_frame_config[1]; |
| uint32_t p_skip_frame[1]; |
| uint32_t p_decode_frame[1]; |
| uint32_t p_decode_up_to_id_part1[1]; |
| uint32_t p_decode_header[1]; |
| uint32_t p_decode_lsd[1]; |
| uint32_t p_decode_extension[1]; |
| uint32_t p_skip_blocks[1]; |
| uint32_t p_decode_ae[1]; |
| uint32_t p_decode_gc[1]; |
| uint32_t p_decode_id_part0[1]; |
| uint32_t p_decode_id_part1[1]; |
| uint32_t p_decode_id_part2[1]; |
| } private_impl; |
| |
| struct { |
| uint8_t f_compressed[4096]; |
| uint8_t f_palettes[2][1024]; |
| uint8_t f_dst_palette[1024]; |
| wuffs_lzw__decoder f_lzw; |
| |
| struct { |
| uint8_t v_blend; |
| uint32_t v_background_color; |
| } s_decode_frame_config[1]; |
| struct { |
| uint64_t scratch; |
| } s_skip_frame[1]; |
| struct { |
| uint8_t v_c[6]; |
| uint32_t v_i; |
| } s_decode_header[1]; |
| struct { |
| uint8_t v_flags; |
| uint8_t v_background_color_index; |
| uint32_t v_num_palette_entries; |
| uint32_t v_i; |
| uint64_t scratch; |
| } s_decode_lsd[1]; |
| struct { |
| uint64_t scratch; |
| } s_skip_blocks[1]; |
| struct { |
| uint8_t v_block_size; |
| bool v_is_animexts; |
| bool v_is_netscape; |
| bool v_is_iccp; |
| bool v_is_xmp; |
| uint64_t scratch; |
| } s_decode_ae[1]; |
| struct { |
| uint64_t scratch; |
| } s_decode_gc[1]; |
| struct { |
| uint64_t scratch; |
| } s_decode_id_part0[1]; |
| struct { |
| uint8_t v_which_palette; |
| uint32_t v_num_palette_entries; |
| uint32_t v_i; |
| uint64_t scratch; |
| } s_decode_id_part1[1]; |
| struct { |
| uint64_t v_block_size; |
| bool v_need_block_size; |
| wuffs_base__status v_lzw_status; |
| uint64_t scratch; |
| } s_decode_id_part2[1]; |
| } private_data; |
| |
| #else // WUFFS_IMPLEMENTATION |
| |
| // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is |
| // large enough to discourage trying to allocate one on the stack. The sizeof |
| // the real private_impl (and the sizeof the real outermost wuffs_foo__bar |
| // struct) is not part of the public, stable, memory-safe API. Call |
| // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their |
| // first argument) instead of fiddling with bar.private_impl.qux fields. |
| // |
| // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still |
| // defines C++ convenience methods. These methods forward on "this", so that |
| // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". |
| private: |
| union { |
| uint32_t align_as_per_magic_field; |
| uint8_t placeholder[1073741824]; // 1 GiB. |
| } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; |
| |
| public: |
| |
| #endif // WUFFS_IMPLEMENTATION |
| |
| #ifdef __cplusplus |
| |
| inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| initialize(size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| return wuffs_gif__decoder__initialize(this, sizeof_star_self, wuffs_version, |
| initialize_flags); |
| } |
| |
| inline wuffs_base__empty_struct // |
| set_quirk_enabled(uint32_t a_quirk, bool a_enabled) { |
| return wuffs_gif__decoder__set_quirk_enabled(this, a_quirk, a_enabled); |
| } |
| |
| inline wuffs_base__status // |
| decode_image_config(wuffs_base__image_config* a_dst, |
| wuffs_base__io_buffer* a_src) { |
| return wuffs_gif__decoder__decode_image_config(this, a_dst, a_src); |
| } |
| |
| inline wuffs_base__empty_struct // |
| set_report_metadata(uint32_t a_fourcc, bool a_report) { |
| return wuffs_gif__decoder__set_report_metadata(this, a_fourcc, a_report); |
| } |
| |
| inline wuffs_base__status // |
| ack_metadata_chunk(wuffs_base__io_buffer* a_src) { |
| return wuffs_gif__decoder__ack_metadata_chunk(this, a_src); |
| } |
| |
| inline uint32_t // |
| metadata_fourcc() const { |
| return wuffs_gif__decoder__metadata_fourcc(this); |
| } |
| |
| inline uint64_t // |
| metadata_chunk_length() const { |
| return wuffs_gif__decoder__metadata_chunk_length(this); |
| } |
| |
| inline uint32_t // |
| num_animation_loops() const { |
| return wuffs_gif__decoder__num_animation_loops(this); |
| } |
| |
| inline uint64_t // |
| num_decoded_frame_configs() const { |
| return wuffs_gif__decoder__num_decoded_frame_configs(this); |
| } |
| |
| inline uint64_t // |
| num_decoded_frames() const { |
| return wuffs_gif__decoder__num_decoded_frames(this); |
| } |
| |
| inline wuffs_base__rect_ie_u32 // |
| frame_dirty_rect() const { |
| return wuffs_gif__decoder__frame_dirty_rect(this); |
| } |
| |
| inline wuffs_base__range_ii_u64 // |
| workbuf_len() const { |
| return wuffs_gif__decoder__workbuf_len(this); |
| } |
| |
| inline wuffs_base__status // |
| restart_frame(uint64_t a_index, uint64_t a_io_position) { |
| return wuffs_gif__decoder__restart_frame(this, a_index, a_io_position); |
| } |
| |
| inline wuffs_base__status // |
| decode_frame_config(wuffs_base__frame_config* a_dst, |
| wuffs_base__io_buffer* a_src) { |
| return wuffs_gif__decoder__decode_frame_config(this, a_dst, a_src); |
| } |
| |
| inline wuffs_base__status // |
| decode_frame(wuffs_base__pixel_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf, |
| wuffs_base__decode_frame_options* a_opts) { |
| return wuffs_gif__decoder__decode_frame(this, a_dst, a_src, a_workbuf, |
| a_opts); |
| } |
| |
| #if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| // Disallow copy and assign. |
| wuffs_gif__decoder__struct(const wuffs_gif__decoder__struct&) = delete; |
| wuffs_gif__decoder__struct& operator=(const wuffs_gif__decoder__struct&) = |
| delete; |
| #endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| |
| #endif // __cplusplus |
| |
| }; // struct wuffs_gif__decoder__struct |
| |
| #endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| // ---------------- Status Codes |
| |
| extern const char* wuffs_gzip__error__bad_checksum; |
| extern const char* wuffs_gzip__error__bad_compression_method; |
| extern const char* wuffs_gzip__error__bad_encoding_flags; |
| extern const char* wuffs_gzip__error__bad_header; |
| |
| // ---------------- Public Consts |
| |
| #define WUFFS_GZIP__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1 |
| |
| // ---------------- Struct Declarations |
| |
| typedef struct wuffs_gzip__decoder__struct wuffs_gzip__decoder; |
| |
| // ---------------- Public Initializer Prototypes |
| |
| // For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self, |
| // etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)". |
| // |
| // Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version. |
| // Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for initialize_flags. |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_gzip__decoder__initialize(wuffs_gzip__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags); |
| |
| size_t // |
| sizeof__wuffs_gzip__decoder(); |
| |
| // ---------------- Public Function Prototypes |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_gzip__decoder__set_ignore_checksum(wuffs_gzip__decoder* self, bool a_ic); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_gzip__decoder__workbuf_len(const wuffs_gzip__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gzip__decoder__decode_io_writer(wuffs_gzip__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf); |
| |
| // ---------------- Struct Definitions |
| |
| // These structs' fields, and the sizeof them, are private implementation |
| // details that aren't guaranteed to be stable across Wuffs versions. |
| // |
| // See https://en.wikipedia.org/wiki/Opaque_pointer#C |
| |
| #if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| struct wuffs_gzip__decoder__struct { |
| #ifdef WUFFS_IMPLEMENTATION |
| |
| // Do not access the private_impl's or private_data's fields directly. There |
| // is no API/ABI compatibility or safety guarantee if you do so. Instead, use |
| // the wuffs_foo__bar__baz functions. |
| // |
| // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct |
| // can be stack allocated when WUFFS_IMPLEMENTATION is defined. |
| |
| struct { |
| uint32_t magic; |
| uint32_t active_coroutine; |
| |
| bool f_ignore_checksum; |
| |
| uint32_t p_decode_io_writer[1]; |
| } private_impl; |
| |
| struct { |
| wuffs_crc32__ieee_hasher f_checksum; |
| wuffs_deflate__decoder f_flate; |
| |
| struct { |
| uint8_t v_flags; |
| uint32_t v_checksum_got; |
| uint32_t v_decoded_length_got; |
| uint32_t v_checksum_want; |
| uint64_t scratch; |
| } s_decode_io_writer[1]; |
| } private_data; |
| |
| #else // WUFFS_IMPLEMENTATION |
| |
| // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is |
| // large enough to discourage trying to allocate one on the stack. The sizeof |
| // the real private_impl (and the sizeof the real outermost wuffs_foo__bar |
| // struct) is not part of the public, stable, memory-safe API. Call |
| // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their |
| // first argument) instead of fiddling with bar.private_impl.qux fields. |
| // |
| // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still |
| // defines C++ convenience methods. These methods forward on "this", so that |
| // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". |
| private: |
| union { |
| uint32_t align_as_per_magic_field; |
| uint8_t placeholder[1073741824]; // 1 GiB. |
| } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; |
| |
| public: |
| |
| #endif // WUFFS_IMPLEMENTATION |
| |
| #ifdef __cplusplus |
| |
| inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| initialize(size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| return wuffs_gzip__decoder__initialize(this, sizeof_star_self, |
| wuffs_version, initialize_flags); |
| } |
| |
| inline wuffs_base__empty_struct // |
| set_ignore_checksum(bool a_ic) { |
| return wuffs_gzip__decoder__set_ignore_checksum(this, a_ic); |
| } |
| |
| inline wuffs_base__range_ii_u64 // |
| workbuf_len() const { |
| return wuffs_gzip__decoder__workbuf_len(this); |
| } |
| |
| inline wuffs_base__status // |
| decode_io_writer(wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf) { |
| return wuffs_gzip__decoder__decode_io_writer(this, a_dst, a_src, a_workbuf); |
| } |
| |
| #if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| // Disallow copy and assign. |
| wuffs_gzip__decoder__struct(const wuffs_gzip__decoder__struct&) = delete; |
| wuffs_gzip__decoder__struct& operator=(const wuffs_gzip__decoder__struct&) = |
| delete; |
| #endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| |
| #endif // __cplusplus |
| |
| }; // struct wuffs_gzip__decoder__struct |
| |
| #endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| // ---------------- Status Codes |
| |
| extern const char* wuffs_zlib__warning__dictionary_required; |
| extern const char* wuffs_zlib__error__bad_checksum; |
| extern const char* wuffs_zlib__error__bad_compression_method; |
| extern const char* wuffs_zlib__error__bad_compression_window_size; |
| extern const char* wuffs_zlib__error__bad_parity_check; |
| extern const char* wuffs_zlib__error__incorrect_dictionary; |
| |
| // ---------------- Public Consts |
| |
| #define WUFFS_ZLIB__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE 1 |
| |
| // ---------------- Struct Declarations |
| |
| typedef struct wuffs_zlib__decoder__struct wuffs_zlib__decoder; |
| |
| // ---------------- Public Initializer Prototypes |
| |
| // For any given "wuffs_foo__bar* self", "wuffs_foo__bar__initialize(self, |
| // etc)" should be called before any other "wuffs_foo__bar__xxx(self, etc)". |
| // |
| // Pass sizeof(*self) and WUFFS_VERSION for sizeof_star_self and wuffs_version. |
| // Pass 0 (or some combination of WUFFS_INITIALIZE__XXX) for initialize_flags. |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_zlib__decoder__initialize(wuffs_zlib__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags); |
| |
| size_t // |
| sizeof__wuffs_zlib__decoder(); |
| |
| // ---------------- Public Function Prototypes |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_zlib__decoder__dictionary_id(const wuffs_zlib__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_zlib__decoder__add_dictionary(wuffs_zlib__decoder* self, |
| wuffs_base__slice_u8 a_dict); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_zlib__decoder__set_ignore_checksum(wuffs_zlib__decoder* self, bool a_ic); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_zlib__decoder__workbuf_len(const wuffs_zlib__decoder* self); |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_zlib__decoder__decode_io_writer(wuffs_zlib__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf); |
| |
| // ---------------- Struct Definitions |
| |
| // These structs' fields, and the sizeof them, are private implementation |
| // details that aren't guaranteed to be stable across Wuffs versions. |
| // |
| // See https://en.wikipedia.org/wiki/Opaque_pointer#C |
| |
| #if defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| struct wuffs_zlib__decoder__struct { |
| #ifdef WUFFS_IMPLEMENTATION |
| |
| // Do not access the private_impl's or private_data's fields directly. There |
| // is no API/ABI compatibility or safety guarantee if you do so. Instead, use |
| // the wuffs_foo__bar__baz functions. |
| // |
| // It is a struct, not a struct*, so that the outermost wuffs_foo__bar struct |
| // can be stack allocated when WUFFS_IMPLEMENTATION is defined. |
| |
| struct { |
| uint32_t magic; |
| uint32_t active_coroutine; |
| |
| bool f_bad_call_sequence; |
| bool f_header_complete; |
| bool f_got_dictionary; |
| bool f_want_dictionary; |
| bool f_ignore_checksum; |
| uint32_t f_dict_id_got; |
| uint32_t f_dict_id_want; |
| |
| uint32_t p_decode_io_writer[1]; |
| } private_impl; |
| |
| struct { |
| wuffs_adler32__hasher f_checksum; |
| wuffs_adler32__hasher f_dict_id_hasher; |
| wuffs_deflate__decoder f_flate; |
| |
| struct { |
| uint32_t v_checksum_got; |
| uint64_t scratch; |
| } s_decode_io_writer[1]; |
| } private_data; |
| |
| #else // WUFFS_IMPLEMENTATION |
| |
| // When WUFFS_IMPLEMENTATION is not defined, this placeholder private_impl is |
| // large enough to discourage trying to allocate one on the stack. The sizeof |
| // the real private_impl (and the sizeof the real outermost wuffs_foo__bar |
| // struct) is not part of the public, stable, memory-safe API. Call |
| // wuffs_foo__bar__baz methods (which all take a "this"-like pointer as their |
| // first argument) instead of fiddling with bar.private_impl.qux fields. |
| // |
| // Even when WUFFS_IMPLEMENTATION is not defined, the outermost struct still |
| // defines C++ convenience methods. These methods forward on "this", so that |
| // you can write "bar->baz(etc)" instead of "wuffs_foo__bar__baz(bar, etc)". |
| private: |
| union { |
| uint32_t align_as_per_magic_field; |
| uint8_t placeholder[1073741824]; // 1 GiB. |
| } private_impl WUFFS_BASE__POTENTIALLY_UNUSED_FIELD; |
| |
| public: |
| |
| #endif // WUFFS_IMPLEMENTATION |
| |
| #ifdef __cplusplus |
| |
| inline wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| initialize(size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| return wuffs_zlib__decoder__initialize(this, sizeof_star_self, |
| wuffs_version, initialize_flags); |
| } |
| |
| inline uint32_t // |
| dictionary_id() const { |
| return wuffs_zlib__decoder__dictionary_id(this); |
| } |
| |
| inline wuffs_base__empty_struct // |
| add_dictionary(wuffs_base__slice_u8 a_dict) { |
| return wuffs_zlib__decoder__add_dictionary(this, a_dict); |
| } |
| |
| inline wuffs_base__empty_struct // |
| set_ignore_checksum(bool a_ic) { |
| return wuffs_zlib__decoder__set_ignore_checksum(this, a_ic); |
| } |
| |
| inline wuffs_base__range_ii_u64 // |
| workbuf_len() const { |
| return wuffs_zlib__decoder__workbuf_len(this); |
| } |
| |
| inline wuffs_base__status // |
| decode_io_writer(wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf) { |
| return wuffs_zlib__decoder__decode_io_writer(this, a_dst, a_src, a_workbuf); |
| } |
| |
| #if (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| // Disallow copy and assign. |
| wuffs_zlib__decoder__struct(const wuffs_zlib__decoder__struct&) = delete; |
| wuffs_zlib__decoder__struct& operator=(const wuffs_zlib__decoder__struct&) = |
| delete; |
| #endif // (__cplusplus >= 201103L) && !defined(WUFFS_IMPLEMENTATION) |
| |
| #endif // __cplusplus |
| |
| }; // struct wuffs_zlib__decoder__struct |
| |
| #endif // defined(__cplusplus) || defined(WUFFS_IMPLEMENTATION) |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| // WUFFS C HEADER ENDS HERE. |
| #ifdef WUFFS_IMPLEMENTATION |
| |
| // GCC does not warn for unused *static inline* functions, but clang does. |
| #ifdef __clang__ |
| #pragma clang diagnostic push |
| #pragma clang diagnostic ignored "-Wunused-function" |
| #endif |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| static inline wuffs_base__empty_struct // |
| wuffs_base__ignore_status(wuffs_base__status z) { |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // WUFFS_BASE__MAGIC is a magic number to check that initializers are called. |
| // It's not foolproof, given C doesn't automatically zero memory before use, |
| // but it should catch 99.99% of cases. |
| // |
| // Its (non-zero) value is arbitrary, based on md5sum("wuffs"). |
| #define WUFFS_BASE__MAGIC ((uint32_t)0x3CCB6C71) |
| |
| // WUFFS_BASE__DISABLED is a magic number to indicate that a non-recoverable |
| // error was previously encountered. |
| // |
| // Its (non-zero) value is arbitrary, based on md5sum("disabled"). |
| #define WUFFS_BASE__DISABLED ((uint32_t)0x075AE3D2) |
| |
| // Denote intentional fallthroughs for -Wimplicit-fallthrough. |
| // |
| // The order matters here. Clang also defines "__GNUC__". |
| #if defined(__clang__) && defined(__cplusplus) && (__cplusplus >= 201103L) |
| #define WUFFS_BASE__FALLTHROUGH [[clang::fallthrough]] |
| #elif !defined(__clang__) && defined(__GNUC__) && (__GNUC__ >= 7) |
| #define WUFFS_BASE__FALLTHROUGH __attribute__((fallthrough)) |
| #else |
| #define WUFFS_BASE__FALLTHROUGH |
| #endif |
| |
| // Use switch cases for coroutine suspension points, similar to the technique |
| // in https://www.chiark.greenend.org.uk/~sgtatham/coroutines.html |
| // |
| // We use trivial macros instead of an explicit assignment and case statement |
| // so that clang-format doesn't get confused by the unusual "case"s. |
| #define WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0 case 0:; |
| #define WUFFS_BASE__COROUTINE_SUSPENSION_POINT(n) \ |
| coro_susp_point = n; \ |
| WUFFS_BASE__FALLTHROUGH; \ |
| case n:; |
| |
| #define WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(n) \ |
| if (!status) { \ |
| goto ok; \ |
| } else if (*status != '$') { \ |
| goto exit; \ |
| } \ |
| coro_susp_point = n; \ |
| goto suspend; \ |
| case n:; |
| |
| // Clang also defines "__GNUC__". |
| #if defined(__GNUC__) |
| #define WUFFS_BASE__LIKELY(expr) (__builtin_expect(!!(expr), 1)) |
| #define WUFFS_BASE__UNLIKELY(expr) (__builtin_expect(!!(expr), 0)) |
| #else |
| #define WUFFS_BASE__LIKELY(expr) (expr) |
| #define WUFFS_BASE__UNLIKELY(expr) (expr) |
| #endif |
| |
| // The helpers below are functions, instead of macros, because their arguments |
| // can be an expression that we shouldn't evaluate more than once. |
| // |
| // They are static, so that linking multiple wuffs .o files won't complain about |
| // duplicate function definitions. |
| // |
| // They are explicitly marked inline, even if modern compilers don't use the |
| // inline attribute to guide optimizations such as inlining, to avoid the |
| // -Wunused-function warning, and we like to compile with -Wall -Werror. |
| |
| // ---------------- Numeric Types |
| |
| static inline uint8_t // |
| wuffs_base__load_u8be(uint8_t* p) { |
| return p[0]; |
| } |
| |
| static inline uint16_t // |
| wuffs_base__load_u16be(uint8_t* p) { |
| return (uint16_t)(((uint16_t)(p[0]) << 8) | ((uint16_t)(p[1]) << 0)); |
| } |
| |
| static inline uint16_t // |
| wuffs_base__load_u16le(uint8_t* p) { |
| return (uint16_t)(((uint16_t)(p[0]) << 0) | ((uint16_t)(p[1]) << 8)); |
| } |
| |
| static inline uint32_t // |
| wuffs_base__load_u24be(uint8_t* p) { |
| return ((uint32_t)(p[0]) << 16) | ((uint32_t)(p[1]) << 8) | |
| ((uint32_t)(p[2]) << 0); |
| } |
| |
| static inline uint32_t // |
| wuffs_base__load_u24le(uint8_t* p) { |
| return ((uint32_t)(p[0]) << 0) | ((uint32_t)(p[1]) << 8) | |
| ((uint32_t)(p[2]) << 16); |
| } |
| |
| static inline uint32_t // |
| wuffs_base__load_u32be(uint8_t* p) { |
| return ((uint32_t)(p[0]) << 24) | ((uint32_t)(p[1]) << 16) | |
| ((uint32_t)(p[2]) << 8) | ((uint32_t)(p[3]) << 0); |
| } |
| |
| static inline uint32_t // |
| wuffs_base__load_u32le(uint8_t* p) { |
| return ((uint32_t)(p[0]) << 0) | ((uint32_t)(p[1]) << 8) | |
| ((uint32_t)(p[2]) << 16) | ((uint32_t)(p[3]) << 24); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__load_u40be(uint8_t* p) { |
| return ((uint64_t)(p[0]) << 32) | ((uint64_t)(p[1]) << 24) | |
| ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 8) | |
| ((uint64_t)(p[4]) << 0); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__load_u40le(uint8_t* p) { |
| return ((uint64_t)(p[0]) << 0) | ((uint64_t)(p[1]) << 8) | |
| ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 24) | |
| ((uint64_t)(p[4]) << 32); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__load_u48be(uint8_t* p) { |
| return ((uint64_t)(p[0]) << 40) | ((uint64_t)(p[1]) << 32) | |
| ((uint64_t)(p[2]) << 24) | ((uint64_t)(p[3]) << 16) | |
| ((uint64_t)(p[4]) << 8) | ((uint64_t)(p[5]) << 0); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__load_u48le(uint8_t* p) { |
| return ((uint64_t)(p[0]) << 0) | ((uint64_t)(p[1]) << 8) | |
| ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 24) | |
| ((uint64_t)(p[4]) << 32) | ((uint64_t)(p[5]) << 40); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__load_u56be(uint8_t* p) { |
| return ((uint64_t)(p[0]) << 48) | ((uint64_t)(p[1]) << 40) | |
| ((uint64_t)(p[2]) << 32) | ((uint64_t)(p[3]) << 24) | |
| ((uint64_t)(p[4]) << 16) | ((uint64_t)(p[5]) << 8) | |
| ((uint64_t)(p[6]) << 0); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__load_u56le(uint8_t* p) { |
| return ((uint64_t)(p[0]) << 0) | ((uint64_t)(p[1]) << 8) | |
| ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 24) | |
| ((uint64_t)(p[4]) << 32) | ((uint64_t)(p[5]) << 40) | |
| ((uint64_t)(p[6]) << 48); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__load_u64be(uint8_t* p) { |
| return ((uint64_t)(p[0]) << 56) | ((uint64_t)(p[1]) << 48) | |
| ((uint64_t)(p[2]) << 40) | ((uint64_t)(p[3]) << 32) | |
| ((uint64_t)(p[4]) << 24) | ((uint64_t)(p[5]) << 16) | |
| ((uint64_t)(p[6]) << 8) | ((uint64_t)(p[7]) << 0); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__load_u64le(uint8_t* p) { |
| return ((uint64_t)(p[0]) << 0) | ((uint64_t)(p[1]) << 8) | |
| ((uint64_t)(p[2]) << 16) | ((uint64_t)(p[3]) << 24) | |
| ((uint64_t)(p[4]) << 32) | ((uint64_t)(p[5]) << 40) | |
| ((uint64_t)(p[6]) << 48) | ((uint64_t)(p[7]) << 56); |
| } |
| |
| // -------- |
| |
| static inline void // |
| wuffs_base__store_u8be(uint8_t* p, uint8_t x) { |
| p[0] = x; |
| } |
| |
| static inline void // |
| wuffs_base__store_u16be(uint8_t* p, uint16_t x) { |
| p[0] = (uint8_t)(x >> 8); |
| p[1] = (uint8_t)(x >> 0); |
| } |
| |
| static inline void // |
| wuffs_base__store_u16le(uint8_t* p, uint16_t x) { |
| p[0] = (uint8_t)(x >> 0); |
| p[1] = (uint8_t)(x >> 8); |
| } |
| |
| static inline void // |
| wuffs_base__store_u24be(uint8_t* p, uint32_t x) { |
| p[0] = (uint8_t)(x >> 16); |
| p[1] = (uint8_t)(x >> 8); |
| p[2] = (uint8_t)(x >> 0); |
| } |
| |
| static inline void // |
| wuffs_base__store_u24le(uint8_t* p, uint32_t x) { |
| p[0] = (uint8_t)(x >> 0); |
| p[1] = (uint8_t)(x >> 8); |
| p[2] = (uint8_t)(x >> 16); |
| } |
| |
| static inline void // |
| wuffs_base__store_u32be(uint8_t* p, uint32_t x) { |
| p[0] = (uint8_t)(x >> 24); |
| p[1] = (uint8_t)(x >> 16); |
| p[2] = (uint8_t)(x >> 8); |
| p[3] = (uint8_t)(x >> 0); |
| } |
| |
| static inline void // |
| wuffs_base__store_u32le(uint8_t* p, uint32_t x) { |
| p[0] = (uint8_t)(x >> 0); |
| p[1] = (uint8_t)(x >> 8); |
| p[2] = (uint8_t)(x >> 16); |
| p[3] = (uint8_t)(x >> 24); |
| } |
| |
| static inline void // |
| wuffs_base__store_u40be(uint8_t* p, uint64_t x) { |
| p[0] = (uint8_t)(x >> 32); |
| p[1] = (uint8_t)(x >> 24); |
| p[2] = (uint8_t)(x >> 16); |
| p[3] = (uint8_t)(x >> 8); |
| p[4] = (uint8_t)(x >> 0); |
| } |
| |
| static inline void // |
| wuffs_base__store_u40le(uint8_t* p, uint64_t x) { |
| p[0] = (uint8_t)(x >> 0); |
| p[1] = (uint8_t)(x >> 8); |
| p[2] = (uint8_t)(x >> 16); |
| p[3] = (uint8_t)(x >> 24); |
| p[4] = (uint8_t)(x >> 32); |
| } |
| |
| static inline void // |
| wuffs_base__store_u48be(uint8_t* p, uint64_t x) { |
| p[0] = (uint8_t)(x >> 40); |
| p[1] = (uint8_t)(x >> 32); |
| p[2] = (uint8_t)(x >> 24); |
| p[3] = (uint8_t)(x >> 16); |
| p[4] = (uint8_t)(x >> 8); |
| p[5] = (uint8_t)(x >> 0); |
| } |
| |
| static inline void // |
| wuffs_base__store_u48le(uint8_t* p, uint64_t x) { |
| p[0] = (uint8_t)(x >> 0); |
| p[1] = (uint8_t)(x >> 8); |
| p[2] = (uint8_t)(x >> 16); |
| p[3] = (uint8_t)(x >> 24); |
| p[4] = (uint8_t)(x >> 32); |
| p[5] = (uint8_t)(x >> 40); |
| } |
| |
| static inline void // |
| wuffs_base__store_u56be(uint8_t* p, uint64_t x) { |
| p[0] = (uint8_t)(x >> 48); |
| p[1] = (uint8_t)(x >> 40); |
| p[2] = (uint8_t)(x >> 32); |
| p[3] = (uint8_t)(x >> 24); |
| p[4] = (uint8_t)(x >> 16); |
| p[5] = (uint8_t)(x >> 8); |
| p[6] = (uint8_t)(x >> 0); |
| } |
| |
| static inline void // |
| wuffs_base__store_u56le(uint8_t* p, uint64_t x) { |
| p[0] = (uint8_t)(x >> 0); |
| p[1] = (uint8_t)(x >> 8); |
| p[2] = (uint8_t)(x >> 16); |
| p[3] = (uint8_t)(x >> 24); |
| p[4] = (uint8_t)(x >> 32); |
| p[5] = (uint8_t)(x >> 40); |
| p[6] = (uint8_t)(x >> 48); |
| } |
| |
| static inline void // |
| wuffs_base__store_u64be(uint8_t* p, uint64_t x) { |
| p[0] = (uint8_t)(x >> 56); |
| p[1] = (uint8_t)(x >> 48); |
| p[2] = (uint8_t)(x >> 40); |
| p[3] = (uint8_t)(x >> 32); |
| p[4] = (uint8_t)(x >> 24); |
| p[5] = (uint8_t)(x >> 16); |
| p[6] = (uint8_t)(x >> 8); |
| p[7] = (uint8_t)(x >> 0); |
| } |
| |
| static inline void // |
| wuffs_base__store_u64le(uint8_t* p, uint64_t x) { |
| p[0] = (uint8_t)(x >> 0); |
| p[1] = (uint8_t)(x >> 8); |
| p[2] = (uint8_t)(x >> 16); |
| p[3] = (uint8_t)(x >> 24); |
| p[4] = (uint8_t)(x >> 32); |
| p[5] = (uint8_t)(x >> 40); |
| p[6] = (uint8_t)(x >> 48); |
| p[7] = (uint8_t)(x >> 56); |
| } |
| |
| // -------- |
| |
| extern const uint8_t wuffs_base__low_bits_mask__u8[9]; |
| extern const uint16_t wuffs_base__low_bits_mask__u16[17]; |
| extern const uint32_t wuffs_base__low_bits_mask__u32[33]; |
| extern const uint64_t wuffs_base__low_bits_mask__u64[65]; |
| |
| #define WUFFS_BASE__LOW_BITS_MASK__U8(n) (wuffs_base__low_bits_mask__u8[n]) |
| #define WUFFS_BASE__LOW_BITS_MASK__U16(n) (wuffs_base__low_bits_mask__u16[n]) |
| #define WUFFS_BASE__LOW_BITS_MASK__U32(n) (wuffs_base__low_bits_mask__u32[n]) |
| #define WUFFS_BASE__LOW_BITS_MASK__U64(n) (wuffs_base__low_bits_mask__u64[n]) |
| |
| // -------- |
| |
| static inline void // |
| wuffs_base__u8__sat_add_indirect(uint8_t* x, uint8_t y) { |
| *x = wuffs_base__u8__sat_add(*x, y); |
| } |
| |
| static inline void // |
| wuffs_base__u8__sat_sub_indirect(uint8_t* x, uint8_t y) { |
| *x = wuffs_base__u8__sat_sub(*x, y); |
| } |
| |
| static inline void // |
| wuffs_base__u16__sat_add_indirect(uint16_t* x, uint16_t y) { |
| *x = wuffs_base__u16__sat_add(*x, y); |
| } |
| |
| static inline void // |
| wuffs_base__u16__sat_sub_indirect(uint16_t* x, uint16_t y) { |
| *x = wuffs_base__u16__sat_sub(*x, y); |
| } |
| |
| static inline void // |
| wuffs_base__u32__sat_add_indirect(uint32_t* x, uint32_t y) { |
| *x = wuffs_base__u32__sat_add(*x, y); |
| } |
| |
| static inline void // |
| wuffs_base__u32__sat_sub_indirect(uint32_t* x, uint32_t y) { |
| *x = wuffs_base__u32__sat_sub(*x, y); |
| } |
| |
| static inline void // |
| wuffs_base__u64__sat_add_indirect(uint64_t* x, uint64_t y) { |
| *x = wuffs_base__u64__sat_add(*x, y); |
| } |
| |
| static inline void // |
| wuffs_base__u64__sat_sub_indirect(uint64_t* x, uint64_t y) { |
| *x = wuffs_base__u64__sat_sub(*x, y); |
| } |
| |
| // ---------------- Slices and Tables |
| |
| // wuffs_base__slice_u8__prefix returns up to the first up_to bytes of s. |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__slice_u8__prefix(wuffs_base__slice_u8 s, uint64_t up_to) { |
| if ((uint64_t)(s.len) > up_to) { |
| s.len = up_to; |
| } |
| return s; |
| } |
| |
| // wuffs_base__slice_u8__suffix returns up to the last up_to bytes of s. |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__slice_u8__suffix(wuffs_base__slice_u8 s, uint64_t up_to) { |
| if ((uint64_t)(s.len) > up_to) { |
| s.ptr += (uint64_t)(s.len) - up_to; |
| s.len = up_to; |
| } |
| return s; |
| } |
| |
| // wuffs_base__slice_u8__copy_from_slice calls memmove(dst.ptr, src.ptr, len) |
| // where len is the minimum of dst.len and src.len. |
| // |
| // Passing a wuffs_base__slice_u8 with all fields NULL or zero (a valid, empty |
| // slice) is valid and results in a no-op. |
| static inline uint64_t // |
| wuffs_base__slice_u8__copy_from_slice(wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 src) { |
| size_t len = dst.len < src.len ? dst.len : src.len; |
| if (len > 0) { |
| memmove(dst.ptr, src.ptr, len); |
| } |
| return len; |
| } |
| |
| // -------- |
| |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__table_u8__row(wuffs_base__table_u8 t, uint32_t y) { |
| if (y < t.height) { |
| return wuffs_base__make_slice_u8(t.ptr + (t.stride * y), t.width); |
| } |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| |
| // ---------------- Slices and Tables (Utility) |
| |
| #define wuffs_base__utility__empty_slice_u8 wuffs_base__empty_slice_u8 |
| |
| // ---------------- Ranges and Rects |
| |
| static inline uint32_t // |
| wuffs_base__range_ii_u32__get_min_incl(const wuffs_base__range_ii_u32* r) { |
| return r->min_incl; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__range_ii_u32__get_max_incl(const wuffs_base__range_ii_u32* r) { |
| return r->max_incl; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__range_ie_u32__get_min_incl(const wuffs_base__range_ie_u32* r) { |
| return r->min_incl; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__range_ie_u32__get_max_excl(const wuffs_base__range_ie_u32* r) { |
| return r->max_excl; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__range_ii_u64__get_min_incl(const wuffs_base__range_ii_u64* r) { |
| return r->min_incl; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__range_ii_u64__get_max_incl(const wuffs_base__range_ii_u64* r) { |
| return r->max_incl; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__range_ie_u64__get_min_incl(const wuffs_base__range_ie_u64* r) { |
| return r->min_incl; |
| } |
| |
| static inline uint64_t // |
| wuffs_base__range_ie_u64__get_max_excl(const wuffs_base__range_ie_u64* r) { |
| return r->max_excl; |
| } |
| |
| // ---------------- Ranges and Rects (Utility) |
| |
| #define wuffs_base__utility__make_range_ii_u32 wuffs_base__make_range_ii_u32 |
| #define wuffs_base__utility__make_range_ie_u32 wuffs_base__make_range_ie_u32 |
| #define wuffs_base__utility__make_range_ii_u64 wuffs_base__make_range_ii_u64 |
| #define wuffs_base__utility__make_range_ie_u64 wuffs_base__make_range_ie_u64 |
| #define wuffs_base__utility__make_rect_ii_u32 wuffs_base__make_rect_ii_u32 |
| #define wuffs_base__utility__make_rect_ie_u32 wuffs_base__make_rect_ie_u32 |
| |
| // ---------------- I/O |
| |
| static inline uint64_t // |
| wuffs_base__io__count_since(uint64_t mark, uint64_t index) { |
| if (index >= mark) { |
| return index - mark; |
| } |
| return 0; |
| } |
| |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__io__since(uint64_t mark, uint64_t index, uint8_t* ptr) { |
| if (index >= mark) { |
| return wuffs_base__make_slice_u8(ptr + mark, index - mark); |
| } |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| |
| static inline uint32_t // |
| wuffs_base__io_writer__copy_n_from_history(uint8_t** ptr_iop_w, |
| uint8_t* io1_w, |
| uint8_t* io2_w, |
| uint32_t length, |
| uint32_t distance) { |
| if (!distance) { |
| return 0; |
| } |
| uint8_t* p = *ptr_iop_w; |
| if ((size_t)(p - io1_w) < (size_t)(distance)) { |
| return 0; |
| } |
| uint8_t* q = p - distance; |
| size_t n = (size_t)(io2_w - p); |
| if ((size_t)(length) > n) { |
| length = (uint32_t)(n); |
| } else { |
| n = (size_t)(length); |
| } |
| // TODO: unrolling by 3 seems best for the std/deflate benchmarks, but that |
| // is mostly because 3 is the minimum length for the deflate format. This |
| // function implementation shouldn't overfit to that one format. Perhaps the |
| // copy_n_from_history Wuffs method should also take an unroll hint argument, |
| // and the cgen can look if that argument is the constant expression '3'. |
| // |
| // See also wuffs_base__io_writer__copy_n_from_history_fast below. |
| // |
| // Alternatively, or additionally, have a sloppy_copy_n_from_history method |
| // that copies 8 bytes at a time, possibly writing more than length bytes? |
| for (; n >= 3; n -= 3) { |
| *p++ = *q++; |
| *p++ = *q++; |
| *p++ = *q++; |
| } |
| for (; n; n--) { |
| *p++ = *q++; |
| } |
| *ptr_iop_w = p; |
| return length; |
| } |
| |
| // wuffs_base__io_writer__copy_n_from_history_fast is like the |
| // wuffs_base__io_writer__copy_n_from_history function above, but has stronger |
| // pre-conditions. The caller needs to prove that: |
| // - distance > 0 |
| // - distance <= (*ptr_iop_w - io1_w) |
| // - length <= (io2_w - *ptr_iop_w) |
| static inline uint32_t // |
| wuffs_base__io_writer__copy_n_from_history_fast(uint8_t** ptr_iop_w, |
| uint8_t* io1_w, |
| uint8_t* io2_w, |
| uint32_t length, |
| uint32_t distance) { |
| uint8_t* p = *ptr_iop_w; |
| uint8_t* q = p - distance; |
| uint32_t n = length; |
| for (; n >= 3; n -= 3) { |
| *p++ = *q++; |
| *p++ = *q++; |
| *p++ = *q++; |
| } |
| for (; n; n--) { |
| *p++ = *q++; |
| } |
| *ptr_iop_w = p; |
| return length; |
| } |
| |
| static inline uint32_t // |
| wuffs_base__io_writer__copy_n_from_reader(uint8_t** ptr_iop_w, |
| uint8_t* io2_w, |
| uint32_t length, |
| uint8_t** ptr_iop_r, |
| uint8_t* io2_r) { |
| uint8_t* iop_w = *ptr_iop_w; |
| size_t n = length; |
| if (n > ((size_t)(io2_w - iop_w))) { |
| n = (size_t)(io2_w - iop_w); |
| } |
| uint8_t* iop_r = *ptr_iop_r; |
| if (n > ((size_t)(io2_r - iop_r))) { |
| n = (size_t)(io2_r - iop_r); |
| } |
| if (n > 0) { |
| memmove(iop_w, iop_r, n); |
| *ptr_iop_w += n; |
| *ptr_iop_r += n; |
| } |
| return (uint32_t)(n); |
| } |
| |
| static inline uint64_t // |
| wuffs_base__io_writer__copy_from_slice(uint8_t** ptr_iop_w, |
| uint8_t* io2_w, |
| wuffs_base__slice_u8 src) { |
| uint8_t* iop_w = *ptr_iop_w; |
| size_t n = src.len; |
| if (n > ((size_t)(io2_w - iop_w))) { |
| n = (size_t)(io2_w - iop_w); |
| } |
| if (n > 0) { |
| memmove(iop_w, src.ptr, n); |
| *ptr_iop_w += n; |
| } |
| return (uint64_t)(n); |
| } |
| |
| static inline uint32_t // |
| wuffs_base__io_writer__copy_n_from_slice(uint8_t** ptr_iop_w, |
| uint8_t* io2_w, |
| uint32_t length, |
| wuffs_base__slice_u8 src) { |
| uint8_t* iop_w = *ptr_iop_w; |
| size_t n = src.len; |
| if (n > length) { |
| n = length; |
| } |
| if (n > ((size_t)(io2_w - iop_w))) { |
| n = (size_t)(io2_w - iop_w); |
| } |
| if (n > 0) { |
| memmove(iop_w, src.ptr, n); |
| *ptr_iop_w += n; |
| } |
| return (uint32_t)(n); |
| } |
| |
| static inline wuffs_base__io_buffer* // |
| wuffs_base__io_reader__set(wuffs_base__io_buffer* b, |
| uint8_t** ptr_iop_r, |
| uint8_t** ptr_io0_r, |
| uint8_t** ptr_io1_r, |
| uint8_t** ptr_io2_r, |
| wuffs_base__slice_u8 data) { |
| b->data = data; |
| b->meta.wi = data.len; |
| b->meta.ri = 0; |
| b->meta.pos = 0; |
| b->meta.closed = false; |
| |
| *ptr_iop_r = data.ptr; |
| *ptr_io0_r = data.ptr; |
| *ptr_io1_r = data.ptr; |
| *ptr_io2_r = data.ptr + data.len; |
| |
| return b; |
| } |
| |
| static inline wuffs_base__slice_u8 // |
| wuffs_base__io_reader__take(uint8_t** ptr_iop_r, uint8_t* io2_r, uint64_t n) { |
| if (n <= ((size_t)(io2_r - *ptr_iop_r))) { |
| uint8_t* p = *ptr_iop_r; |
| *ptr_iop_r += n; |
| return wuffs_base__make_slice_u8(p, n); |
| } |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| |
| static inline wuffs_base__io_buffer* // |
| wuffs_base__io_writer__set(wuffs_base__io_buffer* b, |
| uint8_t** ptr_iop_w, |
| uint8_t** ptr_io0_w, |
| uint8_t** ptr_io1_w, |
| uint8_t** ptr_io2_w, |
| wuffs_base__slice_u8 data) { |
| b->data = data; |
| b->meta.wi = 0; |
| b->meta.ri = 0; |
| b->meta.pos = 0; |
| b->meta.closed = false; |
| |
| *ptr_iop_w = data.ptr; |
| *ptr_io0_w = data.ptr; |
| *ptr_io1_w = data.ptr; |
| *ptr_io2_w = data.ptr + data.len; |
| |
| return b; |
| } |
| |
| // ---------------- I/O (Utility) |
| |
| #define wuffs_base__utility__empty_io_reader wuffs_base__empty_io_reader |
| #define wuffs_base__utility__empty_io_writer wuffs_base__empty_io_writer |
| |
| // ---------------- Memory Allocation |
| |
| // ---------------- Images |
| |
| #if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE) |
| |
| const uint8_t wuffs_base__low_bits_mask__u8[9] = { |
| 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF, |
| }; |
| |
| const uint16_t wuffs_base__low_bits_mask__u16[17] = { |
| 0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F, 0x003F, 0x007F, 0x00FF, |
| 0x01FF, 0x03FF, 0x07FF, 0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF, |
| }; |
| |
| const uint32_t wuffs_base__low_bits_mask__u32[33] = { |
| 0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000F, 0x0000001F, |
| 0x0000003F, 0x0000007F, 0x000000FF, 0x000001FF, 0x000003FF, 0x000007FF, |
| 0x00000FFF, 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF, 0x0001FFFF, |
| 0x0003FFFF, 0x0007FFFF, 0x000FFFFF, 0x001FFFFF, 0x003FFFFF, 0x007FFFFF, |
| 0x00FFFFFF, 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF, 0x1FFFFFFF, |
| 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF, |
| }; |
| |
| const uint64_t wuffs_base__low_bits_mask__u64[65] = { |
| 0x0000000000000000, 0x0000000000000001, 0x0000000000000003, |
| 0x0000000000000007, 0x000000000000000F, 0x000000000000001F, |
| 0x000000000000003F, 0x000000000000007F, 0x00000000000000FF, |
| 0x00000000000001FF, 0x00000000000003FF, 0x00000000000007FF, |
| 0x0000000000000FFF, 0x0000000000001FFF, 0x0000000000003FFF, |
| 0x0000000000007FFF, 0x000000000000FFFF, 0x000000000001FFFF, |
| 0x000000000003FFFF, 0x000000000007FFFF, 0x00000000000FFFFF, |
| 0x00000000001FFFFF, 0x00000000003FFFFF, 0x00000000007FFFFF, |
| 0x0000000000FFFFFF, 0x0000000001FFFFFF, 0x0000000003FFFFFF, |
| 0x0000000007FFFFFF, 0x000000000FFFFFFF, 0x000000001FFFFFFF, |
| 0x000000003FFFFFFF, 0x000000007FFFFFFF, 0x00000000FFFFFFFF, |
| 0x00000001FFFFFFFF, 0x00000003FFFFFFFF, 0x00000007FFFFFFFF, |
| 0x0000000FFFFFFFFF, 0x0000001FFFFFFFFF, 0x0000003FFFFFFFFF, |
| 0x0000007FFFFFFFFF, 0x000000FFFFFFFFFF, 0x000001FFFFFFFFFF, |
| 0x000003FFFFFFFFFF, 0x000007FFFFFFFFFF, 0x00000FFFFFFFFFFF, |
| 0x00001FFFFFFFFFFF, 0x00003FFFFFFFFFFF, 0x00007FFFFFFFFFFF, |
| 0x0000FFFFFFFFFFFF, 0x0001FFFFFFFFFFFF, 0x0003FFFFFFFFFFFF, |
| 0x0007FFFFFFFFFFFF, 0x000FFFFFFFFFFFFF, 0x001FFFFFFFFFFFFF, |
| 0x003FFFFFFFFFFFFF, 0x007FFFFFFFFFFFFF, 0x00FFFFFFFFFFFFFF, |
| 0x01FFFFFFFFFFFFFF, 0x03FFFFFFFFFFFFFF, 0x07FFFFFFFFFFFFFF, |
| 0x0FFFFFFFFFFFFFFF, 0x1FFFFFFFFFFFFFFF, 0x3FFFFFFFFFFFFFFF, |
| 0x7FFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF, |
| }; |
| |
| const char* wuffs_base__warning__end_of_data = "@base: end of data"; |
| const char* wuffs_base__warning__metadata_reported = "@base: metadata reported"; |
| const char* wuffs_base__suspension__short_read = "$base: short read"; |
| const char* wuffs_base__suspension__short_write = "$base: short write"; |
| const char* wuffs_base__error__bad_i_o_position = "#base: bad I/O position"; |
| const char* wuffs_base__error__bad_argument_length_too_short = |
| "#base: bad argument (length too short)"; |
| const char* wuffs_base__error__bad_argument = "#base: bad argument"; |
| const char* wuffs_base__error__bad_call_sequence = "#base: bad call sequence"; |
| const char* wuffs_base__error__bad_receiver = "#base: bad receiver"; |
| const char* wuffs_base__error__bad_restart = "#base: bad restart"; |
| const char* wuffs_base__error__bad_sizeof_receiver = |
| "#base: bad sizeof receiver"; |
| const char* wuffs_base__error__bad_workbuf_length = "#base: bad workbuf length"; |
| const char* wuffs_base__error__bad_wuffs_version = "#base: bad wuffs version"; |
| const char* wuffs_base__error__cannot_return_a_suspension = |
| "#base: cannot return a suspension"; |
| const char* wuffs_base__error__disabled_by_previous_error = |
| "#base: disabled by previous error"; |
| const char* wuffs_base__error__initialize_falsely_claimed_already_zeroed = |
| "#base: initialize falsely claimed already zeroed"; |
| const char* wuffs_base__error__initialize_not_called = |
| "#base: initialize not called"; |
| const char* wuffs_base__error__interleaved_coroutine_calls = |
| "#base: interleaved coroutine calls"; |
| const char* wuffs_base__error__not_enough_data = "#base: not enough data"; |
| const char* wuffs_base__error__unsupported_option = "#base: unsupported option"; |
| const char* wuffs_base__error__too_much_data = "#base: too much data"; |
| |
| // ---------------- Images |
| |
| const uint32_t wuffs_base__pixel_format__bits_per_channel[16] = { |
| 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, |
| 0x08, 0x0A, 0x0C, 0x10, 0x18, 0x20, 0x30, 0x40, |
| }; |
| |
| static uint64_t // |
| wuffs_base__pixel_swizzler__copy_1_1(wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__slice_u8 src) { |
| return wuffs_base__slice_u8__copy_from_slice(dst, src); |
| } |
| |
| static uint64_t // |
| wuffs_base__pixel_swizzler__copy_3_1(wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__slice_u8 src) { |
| if (dst_palette.len != 1024) { |
| return 0; |
| } |
| size_t dst_len3 = dst.len / 3; |
| size_t len = dst_len3 < src.len ? dst_len3 : src.len; |
| uint8_t* d = dst.ptr; |
| uint8_t* s = src.ptr; |
| size_t n = len; |
| |
| // N is the loop unroll count. |
| const int N = 4; |
| |
| // The comparison in the while condition is ">", not ">=", because with ">=", |
| // the last 4-byte store could write past the end of the dst slice. |
| // |
| // Each 4-byte store writes one too many bytes, but a subsequent store will |
| // overwrite that with the correct byte. There is always another store, |
| // whether a 4-byte store in this loop or a 1-byte store in the next loop. |
| while (n > N) { |
| wuffs_base__store_u32le( |
| d + (0 * 3), |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[0]) * 4))); |
| wuffs_base__store_u32le( |
| d + (1 * 3), |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[1]) * 4))); |
| wuffs_base__store_u32le( |
| d + (2 * 3), |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[2]) * 4))); |
| wuffs_base__store_u32le( |
| d + (3 * 3), |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[3]) * 4))); |
| |
| s += 1 * N; |
| d += 3 * N; |
| n -= (size_t)(1 * N); |
| } |
| |
| while (n >= 1) { |
| uint32_t color = |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[0]) * 4)); |
| d[0] = (uint8_t)(color >> 0); |
| d[1] = (uint8_t)(color >> 8); |
| d[2] = (uint8_t)(color >> 16); |
| |
| s += 1 * 1; |
| d += 3 * 1; |
| n -= (size_t)(1 * 1); |
| } |
| |
| return len; |
| } |
| static uint64_t // |
| wuffs_base__pixel_swizzler__copy_4_1(wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__slice_u8 src) { |
| if (dst_palette.len != 1024) { |
| return 0; |
| } |
| size_t dst_len4 = dst.len / 4; |
| size_t len = dst_len4 < src.len ? dst_len4 : src.len; |
| uint8_t* d = dst.ptr; |
| uint8_t* s = src.ptr; |
| size_t n = len; |
| |
| // N is the loop unroll count. |
| const int N = 4; |
| |
| while (n >= N) { |
| wuffs_base__store_u32le( |
| d + (0 * 4), |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[0]) * 4))); |
| wuffs_base__store_u32le( |
| d + (1 * 4), |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[1]) * 4))); |
| wuffs_base__store_u32le( |
| d + (2 * 4), |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[2]) * 4))); |
| wuffs_base__store_u32le( |
| d + (3 * 4), |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[3]) * 4))); |
| |
| s += 1 * N; |
| d += 4 * N; |
| n -= (size_t)(1 * N); |
| } |
| |
| while (n >= 1) { |
| wuffs_base__store_u32le( |
| d + (0 * 4), |
| wuffs_base__load_u32le(dst_palette.ptr + ((uint32_t)(s[0]) * 4))); |
| |
| s += 1 * 1; |
| d += 4 * 1; |
| n -= (size_t)(1 * 1); |
| } |
| |
| return len; |
| } |
| |
| static uint64_t // |
| wuffs_base__pixel_swizzler__swap_rgbx_bgrx(wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 src) { |
| size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4; |
| uint8_t* d = dst.ptr; |
| uint8_t* s = src.ptr; |
| |
| size_t n = len4; |
| while (n--) { |
| uint8_t b0 = s[0]; |
| uint8_t b1 = s[1]; |
| uint8_t b2 = s[2]; |
| uint8_t b3 = s[3]; |
| d[0] = b2; |
| d[1] = b1; |
| d[2] = b0; |
| d[3] = b3; |
| s += 4; |
| d += 4; |
| } |
| return len4 * 4; |
| } |
| |
| wuffs_base__status // |
| wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p, |
| wuffs_base__pixel_format dst_format, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__pixel_format src_format, |
| wuffs_base__slice_u8 src_palette) { |
| if (!p) { |
| return wuffs_base__error__bad_receiver; |
| } |
| |
| // TODO: support many more formats. |
| |
| uint64_t (*func)(wuffs_base__slice_u8 dst, wuffs_base__slice_u8 dst_palette, |
| wuffs_base__slice_u8 src) = NULL; |
| |
| switch (src_format) { |
| case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY: |
| switch (dst_format) { |
| case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL: |
| case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL: |
| case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY: |
| if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) != |
| 1024) { |
| break; |
| } |
| func = wuffs_base__pixel_swizzler__copy_1_1; |
| break; |
| case WUFFS_BASE__PIXEL_FORMAT__BGR: |
| if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) != |
| 1024) { |
| break; |
| } |
| func = wuffs_base__pixel_swizzler__copy_3_1; |
| break; |
| case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL: |
| case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL: |
| case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY: |
| if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) != |
| 1024) { |
| break; |
| } |
| func = wuffs_base__pixel_swizzler__copy_4_1; |
| break; |
| case WUFFS_BASE__PIXEL_FORMAT__RGB: |
| if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette, |
| src_palette) != 1024) { |
| break; |
| } |
| func = wuffs_base__pixel_swizzler__copy_3_1; |
| break; |
| case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL: |
| case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL: |
| case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY: |
| if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette, |
| src_palette) != 1024) { |
| break; |
| } |
| func = wuffs_base__pixel_swizzler__copy_4_1; |
| break; |
| default: |
| break; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| |
| p->private_impl.func = func; |
| return func ? NULL : wuffs_base__error__unsupported_option; |
| } |
| |
| uint64_t // |
| wuffs_base__pixel_swizzler__swizzle_interleaved( |
| const wuffs_base__pixel_swizzler* p, |
| wuffs_base__slice_u8 dst, |
| wuffs_base__slice_u8 dst_palette, |
| wuffs_base__slice_u8 src) { |
| if (p && p->private_impl.func) { |
| return (*(p->private_impl.func))(dst, dst_palette, src); |
| } |
| return 0; |
| } |
| |
| #endif // !defined(WUFFS_CONFIG__MODULES) || |
| // defined(WUFFS_CONFIG__MODULE__BASE) |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #ifdef __clang__ |
| #pragma clang diagnostic pop |
| #endif |
| |
| #if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ADLER32) |
| |
| // ---------------- Status Codes Implementations |
| |
| // ---------------- Private Consts |
| |
| // ---------------- Private Initializer Prototypes |
| |
| // ---------------- Private Function Prototypes |
| |
| // ---------------- Initializer Implementations |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_adler32__hasher__initialize(wuffs_adler32__hasher* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (sizeof(*self) != sizeof_star_self) { |
| return wuffs_base__error__bad_sizeof_receiver; |
| } |
| if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || |
| (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { |
| return wuffs_base__error__bad_wuffs_version; |
| } |
| |
| if ((initialize_flags & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) { |
| // The whole point of this if-check is to detect an uninitialized *self. |
| // We disable the warning on GCC. Clang-5.0 does not have this warning. |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wmaybe-uninitialized" |
| #endif |
| if (self->private_impl.magic != 0) { |
| return wuffs_base__error__initialize_falsely_claimed_already_zeroed; |
| } |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| } else { |
| if ((initialize_flags & |
| WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { |
| memset(self, 0, sizeof(*self)); |
| initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; |
| } else { |
| memset(&(self->private_impl), 0, sizeof(self->private_impl)); |
| } |
| } |
| |
| self->private_impl.magic = WUFFS_BASE__MAGIC; |
| return NULL; |
| } |
| |
| size_t // |
| sizeof__wuffs_adler32__hasher() { |
| return sizeof(wuffs_adler32__hasher); |
| } |
| |
| // ---------------- Function Implementations |
| |
| // -------- func adler32.hasher.update_u32 |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_adler32__hasher__update_u32(wuffs_adler32__hasher* self, |
| wuffs_base__slice_u8 a_x) { |
| if (!self) { |
| return 0; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return 0; |
| } |
| |
| uint32_t v_s1 = 0; |
| uint32_t v_s2 = 0; |
| wuffs_base__slice_u8 v_remaining = {0}; |
| wuffs_base__slice_u8 v_p = {0}; |
| |
| if (!self->private_impl.f_started) { |
| self->private_impl.f_started = true; |
| self->private_impl.f_state = 1; |
| } |
| v_s1 = ((self->private_impl.f_state) & 0xFFFF); |
| v_s2 = ((self->private_impl.f_state) >> (32 - (16))); |
| while (((uint64_t)(a_x.len)) > 0) { |
| v_remaining = wuffs_base__slice_u8__subslice_j(a_x, 0); |
| if (((uint64_t)(a_x.len)) > 5552) { |
| v_remaining = wuffs_base__slice_u8__subslice_i(a_x, 5552); |
| a_x = wuffs_base__slice_u8__subslice_j(a_x, 5552); |
| } |
| { |
| wuffs_base__slice_u8 i_slice_p = a_x; |
| v_p = i_slice_p; |
| v_p.len = 1; |
| uint8_t* i_end0_p = i_slice_p.ptr + (i_slice_p.len / 8) * 8; |
| while (v_p.ptr < i_end0_p) { |
| v_s1 += ((uint32_t)(v_p.ptr[0])); |
| v_s2 += v_s1; |
| v_p.ptr += 1; |
| v_s1 += ((uint32_t)(v_p.ptr[0])); |
| v_s2 += v_s1; |
| v_p.ptr += 1; |
| v_s1 += ((uint32_t)(v_p.ptr[0])); |
| v_s2 += v_s1; |
| v_p.ptr += 1; |
| v_s1 += ((uint32_t)(v_p.ptr[0])); |
| v_s2 += v_s1; |
| v_p.ptr += 1; |
| v_s1 += ((uint32_t)(v_p.ptr[0])); |
| v_s2 += v_s1; |
| v_p.ptr += 1; |
| v_s1 += ((uint32_t)(v_p.ptr[0])); |
| v_s2 += v_s1; |
| v_p.ptr += 1; |
| v_s1 += ((uint32_t)(v_p.ptr[0])); |
| v_s2 += v_s1; |
| v_p.ptr += 1; |
| v_s1 += ((uint32_t)(v_p.ptr[0])); |
| v_s2 += v_s1; |
| v_p.ptr += 1; |
| } |
| v_p.len = 1; |
| uint8_t* i_end1_p = i_slice_p.ptr + (i_slice_p.len / 1) * 1; |
| while (v_p.ptr < i_end1_p) { |
| v_s1 += ((uint32_t)(v_p.ptr[0])); |
| v_s2 += v_s1; |
| v_p.ptr += 1; |
| } |
| } |
| v_s1 %= 65521; |
| v_s2 %= 65521; |
| a_x = v_remaining; |
| } |
| self->private_impl.f_state = (((v_s2 & 65535) << 16) | (v_s1 & 65535)); |
| return self->private_impl.f_state; |
| } |
| |
| #endif // !defined(WUFFS_CONFIG__MODULES) || |
| // defined(WUFFS_CONFIG__MODULE__ADLER32) |
| |
| #if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__CRC32) |
| |
| // ---------------- Status Codes Implementations |
| |
| // ---------------- Private Consts |
| |
| static const uint32_t // |
| wuffs_crc32__ieee_table[16][256] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| { |
| 0, 1996959894, 3993919788, 2567524794, 124634137, |
| 1886057615, 3915621685, 2657392035, 249268274, 2044508324, |
| 3772115230, 2547177864, 162941995, 2125561021, 3887607047, |
| 2428444049, 498536548, 1789927666, 4089016648, 2227061214, |
| 450548861, 1843258603, 4107580753, 2211677639, 325883990, |
| 1684777152, 4251122042, 2321926636, 335633487, 1661365465, |
| 4195302755, 2366115317, 997073096, 1281953886, 3579855332, |
| 2724688242, 1006888145, 1258607687, 3524101629, 2768942443, |
| 901097722, 1119000684, 3686517206, 2898065728, 853044451, |
| 1172266101, 3705015759, 2882616665, 651767980, 1373503546, |
| 3369554304, 3218104598, 565507253, 1454621731, 3485111705, |
| 3099436303, 671266974, 1594198024, 3322730930, 2970347812, |
| 795835527, 1483230225, 3244367275, 3060149565, 1994146192, |
| 31158534, 2563907772, 4023717930, 1907459465, 112637215, |
| 2680153253, 3904427059, 2013776290, 251722036, 2517215374, |
| 3775830040, 2137656763, 141376813, 2439277719, 3865271297, |
| 1802195444, 476864866, 2238001368, 4066508878, 1812370925, |
| 453092731, 2181625025, 4111451223, 1706088902, 314042704, |
| 2344532202, 4240017532, 1658658271, 366619977, 2362670323, |
| 4224994405, 1303535960, 984961486, 2747007092, 3569037538, |
| 1256170817, 1037604311, 2765210733, 3554079995, 1131014506, |
| 879679996, 2909243462, 3663771856, 1141124467, 855842277, |
| 2852801631, 3708648649, 1342533948, 654459306, 3188396048, |
| 3373015174, 1466479909, 544179635, 3110523913, 3462522015, |
| 1591671054, 702138776, 2966460450, 3352799412, 1504918807, |
| 783551873, 3082640443, 3233442989, 3988292384, 2596254646, |
| 62317068, 1957810842, 3939845945, 2647816111, 81470997, |
| 1943803523, 3814918930, 2489596804, 225274430, 2053790376, |
| 3826175755, 2466906013, 167816743, 2097651377, 4027552580, |
| 2265490386, 503444072, 1762050814, 4150417245, 2154129355, |
| 426522225, 1852507879, 4275313526, 2312317920, 282753626, |
| 1742555852, 4189708143, 2394877945, 397917763, 1622183637, |
| 3604390888, 2714866558, 953729732, 1340076626, 3518719985, |
| 2797360999, 1068828381, 1219638859, 3624741850, 2936675148, |
| 906185462, 1090812512, 3747672003, 2825379669, 829329135, |
| 1181335161, 3412177804, 3160834842, 628085408, 1382605366, |
| 3423369109, 3138078467, 570562233, 1426400815, 3317316542, |
| 2998733608, 733239954, 1555261956, 3268935591, 3050360625, |
| 752459403, 1541320221, 2607071920, 3965973030, 1969922972, |
| 40735498, 2617837225, 3943577151, 1913087877, 83908371, |
| 2512341634, 3803740692, 2075208622, 213261112, 2463272603, |
| 3855990285, 2094854071, 198958881, 2262029012, 4057260610, |
| 1759359992, 534414190, 2176718541, 4139329115, 1873836001, |
| 414664567, 2282248934, 4279200368, 1711684554, 285281116, |
| 2405801727, 4167216745, 1634467795, 376229701, 2685067896, |
| 3608007406, 1308918612, 956543938, 2808555105, 3495958263, |
| 1231636301, 1047427035, 2932959818, 3654703836, 1088359270, |
| 936918000, 2847714899, 3736837829, 1202900863, 817233897, |
| 3183342108, 3401237130, 1404277552, 615818150, 3134207493, |
| 3453421203, 1423857449, 601450431, 3009837614, 3294710456, |
| 1567103746, 711928724, 3020668471, 3272380065, 1510334235, |
| 755167117, |
| }, |
| { |
| 0, 421212481, 842424962, 724390851, 1684849924, |
| 2105013317, 1448781702, 1329698503, 3369699848, 3519200073, |
| 4210026634, 3824474571, 2897563404, 3048111693, 2659397006, |
| 2274893007, 1254232657, 1406739216, 2029285587, 1643069842, |
| 783210325, 934667796, 479770071, 92505238, 2182846553, |
| 2600511768, 2955803355, 2838940570, 3866582365, 4285295644, |
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| }, |
| }; |
| |
| // ---------------- Private Initializer Prototypes |
| |
| // ---------------- Private Function Prototypes |
| |
| // ---------------- Initializer Implementations |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_crc32__ieee_hasher__initialize(wuffs_crc32__ieee_hasher* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (sizeof(*self) != sizeof_star_self) { |
| return wuffs_base__error__bad_sizeof_receiver; |
| } |
| if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || |
| (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { |
| return wuffs_base__error__bad_wuffs_version; |
| } |
| |
| if ((initialize_flags & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) { |
| // The whole point of this if-check is to detect an uninitialized *self. |
| // We disable the warning on GCC. Clang-5.0 does not have this warning. |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wmaybe-uninitialized" |
| #endif |
| if (self->private_impl.magic != 0) { |
| return wuffs_base__error__initialize_falsely_claimed_already_zeroed; |
| } |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| } else { |
| if ((initialize_flags & |
| WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { |
| memset(self, 0, sizeof(*self)); |
| initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; |
| } else { |
| memset(&(self->private_impl), 0, sizeof(self->private_impl)); |
| } |
| } |
| |
| self->private_impl.magic = WUFFS_BASE__MAGIC; |
| return NULL; |
| } |
| |
| size_t // |
| sizeof__wuffs_crc32__ieee_hasher() { |
| return sizeof(wuffs_crc32__ieee_hasher); |
| } |
| |
| // ---------------- Function Implementations |
| |
| // -------- func crc32.ieee_hasher.update_u32 |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_crc32__ieee_hasher__update_u32(wuffs_crc32__ieee_hasher* self, |
| wuffs_base__slice_u8 a_x) { |
| if (!self) { |
| return 0; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return 0; |
| } |
| |
| uint32_t v_s = 0; |
| wuffs_base__slice_u8 v_p = {0}; |
| |
| v_s = (4294967295 ^ self->private_impl.f_state); |
| { |
| wuffs_base__slice_u8 i_slice_p = a_x; |
| v_p = i_slice_p; |
| v_p.len = 16; |
| uint8_t* i_end0_p = i_slice_p.ptr + (i_slice_p.len / 32) * 32; |
| while (v_p.ptr < i_end0_p) { |
| v_s ^= |
| ((((uint32_t)(v_p.ptr[0])) << 0) | (((uint32_t)(v_p.ptr[1])) << 8) | |
| (((uint32_t)(v_p.ptr[2])) << 16) | (((uint32_t)(v_p.ptr[3])) << 24)); |
| v_s = (wuffs_crc32__ieee_table[0][v_p.ptr[15]] ^ |
| wuffs_crc32__ieee_table[1][v_p.ptr[14]] ^ |
| wuffs_crc32__ieee_table[2][v_p.ptr[13]] ^ |
| wuffs_crc32__ieee_table[3][v_p.ptr[12]] ^ |
| wuffs_crc32__ieee_table[4][v_p.ptr[11]] ^ |
| wuffs_crc32__ieee_table[5][v_p.ptr[10]] ^ |
| wuffs_crc32__ieee_table[6][v_p.ptr[9]] ^ |
| wuffs_crc32__ieee_table[7][v_p.ptr[8]] ^ |
| wuffs_crc32__ieee_table[8][v_p.ptr[7]] ^ |
| wuffs_crc32__ieee_table[9][v_p.ptr[6]] ^ |
| wuffs_crc32__ieee_table[10][v_p.ptr[5]] ^ |
| wuffs_crc32__ieee_table[11][v_p.ptr[4]] ^ |
| wuffs_crc32__ieee_table[12][(255 & (v_s >> 24))] ^ |
| wuffs_crc32__ieee_table[13][(255 & (v_s >> 16))] ^ |
| wuffs_crc32__ieee_table[14][(255 & (v_s >> 8))] ^ |
| wuffs_crc32__ieee_table[15][(255 & (v_s >> 0))]); |
| v_p.ptr += 16; |
| v_s ^= |
| ((((uint32_t)(v_p.ptr[0])) << 0) | (((uint32_t)(v_p.ptr[1])) << 8) | |
| (((uint32_t)(v_p.ptr[2])) << 16) | (((uint32_t)(v_p.ptr[3])) << 24)); |
| v_s = (wuffs_crc32__ieee_table[0][v_p.ptr[15]] ^ |
| wuffs_crc32__ieee_table[1][v_p.ptr[14]] ^ |
| wuffs_crc32__ieee_table[2][v_p.ptr[13]] ^ |
| wuffs_crc32__ieee_table[3][v_p.ptr[12]] ^ |
| wuffs_crc32__ieee_table[4][v_p.ptr[11]] ^ |
| wuffs_crc32__ieee_table[5][v_p.ptr[10]] ^ |
| wuffs_crc32__ieee_table[6][v_p.ptr[9]] ^ |
| wuffs_crc32__ieee_table[7][v_p.ptr[8]] ^ |
| wuffs_crc32__ieee_table[8][v_p.ptr[7]] ^ |
| wuffs_crc32__ieee_table[9][v_p.ptr[6]] ^ |
| wuffs_crc32__ieee_table[10][v_p.ptr[5]] ^ |
| wuffs_crc32__ieee_table[11][v_p.ptr[4]] ^ |
| wuffs_crc32__ieee_table[12][(255 & (v_s >> 24))] ^ |
| wuffs_crc32__ieee_table[13][(255 & (v_s >> 16))] ^ |
| wuffs_crc32__ieee_table[14][(255 & (v_s >> 8))] ^ |
| wuffs_crc32__ieee_table[15][(255 & (v_s >> 0))]); |
| v_p.ptr += 16; |
| } |
| v_p.len = 16; |
| uint8_t* i_end1_p = i_slice_p.ptr + (i_slice_p.len / 16) * 16; |
| while (v_p.ptr < i_end1_p) { |
| v_s ^= |
| ((((uint32_t)(v_p.ptr[0])) << 0) | (((uint32_t)(v_p.ptr[1])) << 8) | |
| (((uint32_t)(v_p.ptr[2])) << 16) | (((uint32_t)(v_p.ptr[3])) << 24)); |
| v_s = (wuffs_crc32__ieee_table[0][v_p.ptr[15]] ^ |
| wuffs_crc32__ieee_table[1][v_p.ptr[14]] ^ |
| wuffs_crc32__ieee_table[2][v_p.ptr[13]] ^ |
| wuffs_crc32__ieee_table[3][v_p.ptr[12]] ^ |
| wuffs_crc32__ieee_table[4][v_p.ptr[11]] ^ |
| wuffs_crc32__ieee_table[5][v_p.ptr[10]] ^ |
| wuffs_crc32__ieee_table[6][v_p.ptr[9]] ^ |
| wuffs_crc32__ieee_table[7][v_p.ptr[8]] ^ |
| wuffs_crc32__ieee_table[8][v_p.ptr[7]] ^ |
| wuffs_crc32__ieee_table[9][v_p.ptr[6]] ^ |
| wuffs_crc32__ieee_table[10][v_p.ptr[5]] ^ |
| wuffs_crc32__ieee_table[11][v_p.ptr[4]] ^ |
| wuffs_crc32__ieee_table[12][(255 & (v_s >> 24))] ^ |
| wuffs_crc32__ieee_table[13][(255 & (v_s >> 16))] ^ |
| wuffs_crc32__ieee_table[14][(255 & (v_s >> 8))] ^ |
| wuffs_crc32__ieee_table[15][(255 & (v_s >> 0))]); |
| v_p.ptr += 16; |
| } |
| v_p.len = 1; |
| uint8_t* i_end2_p = i_slice_p.ptr + (i_slice_p.len / 1) * 1; |
| while (v_p.ptr < i_end2_p) { |
| v_s = |
| (wuffs_crc32__ieee_table[0][(((uint8_t)((v_s & 255))) ^ v_p.ptr[0])] ^ |
| (v_s >> 8)); |
| v_p.ptr += 1; |
| } |
| } |
| self->private_impl.f_state = (4294967295 ^ v_s); |
| return self->private_impl.f_state; |
| } |
| |
| #endif // !defined(WUFFS_CONFIG__MODULES) || |
| // defined(WUFFS_CONFIG__MODULE__CRC32) |
| |
| #if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__DEFLATE) |
| |
| // ---------------- Status Codes Implementations |
| |
| const char* wuffs_deflate__error__bad_huffman_code_over_subscribed = |
| "#deflate: bad Huffman code (over-subscribed)"; |
| const char* wuffs_deflate__error__bad_huffman_code_under_subscribed = |
| "#deflate: bad Huffman code (under-subscribed)"; |
| const char* wuffs_deflate__error__bad_huffman_code_length_count = |
| "#deflate: bad Huffman code length count"; |
| const char* wuffs_deflate__error__bad_huffman_code_length_repetition = |
| "#deflate: bad Huffman code length repetition"; |
| const char* wuffs_deflate__error__bad_huffman_code = |
| "#deflate: bad Huffman code"; |
| const char* wuffs_deflate__error__bad_huffman_minimum_code_length = |
| "#deflate: bad Huffman minimum code length"; |
| const char* wuffs_deflate__error__bad_block = "#deflate: bad block"; |
| const char* wuffs_deflate__error__bad_distance = "#deflate: bad distance"; |
| const char* wuffs_deflate__error__bad_distance_code_count = |
| "#deflate: bad distance code count"; |
| const char* wuffs_deflate__error__bad_literal_length_code_count = |
| "#deflate: bad literal/length code count"; |
| const char* wuffs_deflate__error__inconsistent_stored_block_length = |
| "#deflate: inconsistent stored block length"; |
| const char* wuffs_deflate__error__missing_end_of_block_code = |
| "#deflate: missing end-of-block code"; |
| const char* wuffs_deflate__error__no_huffman_codes = |
| "#deflate: no Huffman codes"; |
| const char* |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state = |
| "#deflate: internal error: inconsistent Huffman decoder state"; |
| const char* wuffs_deflate__error__internal_error_inconsistent_i_o = |
| "#deflate: internal error: inconsistent I/O"; |
| const char* wuffs_deflate__error__internal_error_inconsistent_distance = |
| "#deflate: internal error: inconsistent distance"; |
| const char* wuffs_deflate__error__internal_error_inconsistent_n_bits = |
| "#deflate: internal error: inconsistent n_bits"; |
| |
| // ---------------- Private Consts |
| |
| static const uint8_t // |
| wuffs_deflate__code_order[19] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15, |
| }; |
| |
| static const uint8_t // |
| wuffs_deflate__reverse8[256] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, |
| 112, 240, 8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, |
| 56, 184, 120, 248, 4, 132, 68, 196, 36, 164, 100, 228, 20, 148, |
| 84, 212, 52, 180, 116, 244, 12, 140, 76, 204, 44, 172, 108, 236, |
| 28, 156, 92, 220, 60, 188, 124, 252, 2, 130, 66, 194, 34, 162, |
| 98, 226, 18, 146, 82, 210, 50, 178, 114, 242, 10, 138, 74, 202, |
| 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250, 6, 134, |
| 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246, |
| 14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, |
| 126, 254, 1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, |
| 49, 177, 113, 241, 9, 137, 73, 201, 41, 169, 105, 233, 25, 153, |
| 89, 217, 57, 185, 121, 249, 5, 133, 69, 197, 37, 165, 101, 229, |
| 21, 149, 85, 213, 53, 181, 117, 245, 13, 141, 77, 205, 45, 173, |
| 109, 237, 29, 157, 93, 221, 61, 189, 125, 253, 3, 131, 67, 195, |
| 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243, 11, 139, |
| 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251, |
| 7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, |
| 119, 247, 15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, |
| 63, 191, 127, 255, |
| }; |
| |
| static const uint32_t // |
| wuffs_deflate__lcode_magic_numbers[32] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 1073741824, 1073742080, 1073742336, 1073742592, 1073742848, 1073743104, |
| 1073743360, 1073743616, 1073743888, 1073744400, 1073744912, 1073745424, |
| 1073745952, 1073746976, 1073748000, 1073749024, 1073750064, 1073752112, |
| 1073754160, 1073756208, 1073758272, 1073762368, 1073766464, 1073770560, |
| 1073774672, 1073782864, 1073791056, 1073799248, 1073807104, 134217728, |
| 134217728, 134217728, |
| }; |
| |
| static const uint32_t // |
| wuffs_deflate__dcode_magic_numbers[32] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 1073741824, 1073742080, 1073742336, 1073742592, 1073742864, 1073743376, |
| 1073743904, 1073744928, 1073745968, 1073748016, 1073750080, 1073754176, |
| 1073758288, 1073766480, 1073774688, 1073791072, 1073807472, 1073840240, |
| 1073873024, 1073938560, 1074004112, 1074135184, 1074266272, 1074528416, |
| 1074790576, 1075314864, 1075839168, 1076887744, 1077936336, 1080033488, |
| 134217728, 134217728, |
| }; |
| |
| #define WUFFS_DEFLATE__HUFFS_TABLE_SIZE 1024 |
| |
| #define WUFFS_DEFLATE__HUFFS_TABLE_MASK 1023 |
| |
| // ---------------- Private Initializer Prototypes |
| |
| // ---------------- Private Function Prototypes |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__decode_blocks(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__decode_uncompressed(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__init_fixed_huffman(wuffs_deflate__decoder* self); |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__init_dynamic_huffman(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__init_huff(wuffs_deflate__decoder* self, |
| uint32_t a_which, |
| uint32_t a_n_codes0, |
| uint32_t a_n_codes1, |
| uint32_t a_base_symbol); |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__decode_huffman_fast(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__decode_huffman_slow(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src); |
| |
| // ---------------- Initializer Implementations |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_deflate__decoder__initialize(wuffs_deflate__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (sizeof(*self) != sizeof_star_self) { |
| return wuffs_base__error__bad_sizeof_receiver; |
| } |
| if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || |
| (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { |
| return wuffs_base__error__bad_wuffs_version; |
| } |
| |
| if ((initialize_flags & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) { |
| // The whole point of this if-check is to detect an uninitialized *self. |
| // We disable the warning on GCC. Clang-5.0 does not have this warning. |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wmaybe-uninitialized" |
| #endif |
| if (self->private_impl.magic != 0) { |
| return wuffs_base__error__initialize_falsely_claimed_already_zeroed; |
| } |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| } else { |
| if ((initialize_flags & |
| WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { |
| memset(self, 0, sizeof(*self)); |
| initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; |
| } else { |
| memset(&(self->private_impl), 0, sizeof(self->private_impl)); |
| } |
| } |
| |
| self->private_impl.magic = WUFFS_BASE__MAGIC; |
| return NULL; |
| } |
| |
| size_t // |
| sizeof__wuffs_deflate__decoder() { |
| return sizeof(wuffs_deflate__decoder); |
| } |
| |
| // ---------------- Function Implementations |
| |
| // -------- func deflate.decoder.add_history |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_deflate__decoder__add_history(wuffs_deflate__decoder* self, |
| wuffs_base__slice_u8 a_hist) { |
| if (!self) { |
| return wuffs_base__make_empty_struct(); |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| wuffs_base__slice_u8 v_s = {0}; |
| uint64_t v_n_copied = 0; |
| uint32_t v_already_full = 0; |
| |
| v_s = a_hist; |
| if (((uint64_t)(v_s.len)) >= 32768) { |
| v_s = wuffs_base__slice_u8__suffix(v_s, 32768); |
| wuffs_base__slice_u8__copy_from_slice( |
| wuffs_base__make_slice_u8(self->private_data.f_history, 32768), v_s); |
| self->private_impl.f_history_index = 32768; |
| } else { |
| v_n_copied = wuffs_base__slice_u8__copy_from_slice( |
| wuffs_base__slice_u8__subslice_i( |
| wuffs_base__make_slice_u8(self->private_data.f_history, 32768), |
| (self->private_impl.f_history_index & 32767)), |
| v_s); |
| if (v_n_copied < ((uint64_t)(v_s.len))) { |
| v_s = wuffs_base__slice_u8__subslice_i(v_s, v_n_copied); |
| v_n_copied = wuffs_base__slice_u8__copy_from_slice( |
| wuffs_base__make_slice_u8(self->private_data.f_history, 32768), v_s); |
| self->private_impl.f_history_index = |
| (((uint32_t)((v_n_copied & 32767))) + 32768); |
| } else { |
| v_already_full = 0; |
| if (self->private_impl.f_history_index >= 32768) { |
| v_already_full = 32768; |
| } |
| self->private_impl.f_history_index = |
| ((self->private_impl.f_history_index & 32767) + |
| ((uint32_t)((v_n_copied & 32767))) + v_already_full); |
| } |
| } |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // -------- func deflate.decoder.workbuf_len |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_deflate__decoder__workbuf_len(const wuffs_deflate__decoder* self) { |
| if (!self) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| |
| return wuffs_base__utility__make_range_ii_u64(1, 1); |
| } |
| |
| // -------- func deflate.decoder.decode_io_writer |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_deflate__decoder__decode_io_writer(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return (self->private_impl.magic == WUFFS_BASE__DISABLED) |
| ? wuffs_base__error__disabled_by_previous_error |
| : wuffs_base__error__initialize_not_called; |
| } |
| if (!a_dst || !a_src) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__bad_argument; |
| } |
| if ((self->private_impl.active_coroutine != 0) && |
| (self->private_impl.active_coroutine != 1)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__interleaved_coroutine_calls; |
| } |
| self->private_impl.active_coroutine = 0; |
| wuffs_base__status status = NULL; |
| |
| uint64_t v_mark = 0; |
| wuffs_base__status v_status = NULL; |
| |
| uint8_t* iop_a_dst = NULL; |
| uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_dst) { |
| io0_a_dst = a_dst->data.ptr; |
| io1_a_dst = io0_a_dst + a_dst->meta.wi; |
| iop_a_dst = io1_a_dst; |
| io2_a_dst = io0_a_dst + a_dst->data.len; |
| if (a_dst->meta.closed) { |
| io2_a_dst = iop_a_dst; |
| } |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_io_writer[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| while (true) { |
| v_mark = ((uint64_t)(iop_a_dst - io0_a_dst)); |
| { |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| wuffs_base__status t_0 = |
| wuffs_deflate__decoder__decode_blocks(self, a_dst, a_src); |
| if (a_dst) { |
| iop_a_dst = a_dst->data.ptr + a_dst->meta.wi; |
| } |
| v_status = t_0; |
| } |
| if (!wuffs_base__status__is_suspension(v_status)) { |
| status = v_status; |
| if (wuffs_base__status__is_error(status)) { |
| goto exit; |
| } else if (wuffs_base__status__is_suspension(status)) { |
| status = wuffs_base__error__cannot_return_a_suspension; |
| goto exit; |
| } |
| goto ok; |
| } |
| wuffs_deflate__decoder__add_history( |
| self, wuffs_base__io__since( |
| v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)), io0_a_dst)); |
| status = v_status; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1); |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_io_writer[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_io_writer[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_impl.active_coroutine = |
| wuffs_base__status__is_suspension(status) ? 1 : 0; |
| |
| goto exit; |
| exit: |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| |
| if (wuffs_base__status__is_error(status)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| } |
| return status; |
| } |
| |
| // -------- func deflate.decoder.decode_blocks |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__decode_blocks(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint32_t v_final = 0; |
| uint32_t v_b0 = 0; |
| uint32_t v_type = 0; |
| wuffs_base__status v_status = NULL; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_blocks[0]; |
| if (coro_susp_point) { |
| v_final = self->private_data.s_decode_blocks[0].v_final; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| label_0_continue:; |
| while (v_final == 0) { |
| while (self->private_impl.f_n_bits < 3) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_0 = *iop_a_src++; |
| v_b0 = t_0; |
| } |
| self->private_impl.f_bits |= (v_b0 << self->private_impl.f_n_bits); |
| self->private_impl.f_n_bits += 8; |
| } |
| v_final = (self->private_impl.f_bits & 1); |
| v_type = ((self->private_impl.f_bits >> 1) & 3); |
| self->private_impl.f_bits >>= 3; |
| self->private_impl.f_n_bits -= 3; |
| if (v_type == 0) { |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| status = |
| wuffs_deflate__decoder__decode_uncompressed(self, a_dst, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| goto label_0_continue; |
| } else if (v_type == 1) { |
| v_status = wuffs_deflate__decoder__init_fixed_huffman(self); |
| if (!wuffs_base__status__is_ok(v_status)) { |
| status = v_status; |
| if (wuffs_base__status__is_error(status)) { |
| goto exit; |
| } else if (wuffs_base__status__is_suspension(status)) { |
| status = wuffs_base__error__cannot_return_a_suspension; |
| goto exit; |
| } |
| goto ok; |
| } |
| } else if (v_type == 2) { |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| status = wuffs_deflate__decoder__init_dynamic_huffman(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| } else { |
| status = wuffs_deflate__error__bad_block; |
| goto exit; |
| } |
| self->private_impl.f_end_of_block = false; |
| while (true) { |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| v_status = |
| wuffs_deflate__decoder__decode_huffman_fast(self, a_dst, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (wuffs_base__status__is_error(v_status)) { |
| status = v_status; |
| goto exit; |
| } |
| if (self->private_impl.f_end_of_block) { |
| goto label_0_continue; |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| status = |
| wuffs_deflate__decoder__decode_huffman_slow(self, a_dst, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| if (self->private_impl.f_end_of_block) { |
| goto label_0_continue; |
| } |
| } |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_blocks[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_blocks[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_data.s_decode_blocks[0].v_final = v_final; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func deflate.decoder.decode_uncompressed |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__decode_uncompressed(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint32_t v_length = 0; |
| uint32_t v_n_copied = 0; |
| |
| uint8_t* iop_a_dst = NULL; |
| uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_dst) { |
| io0_a_dst = a_dst->data.ptr; |
| io1_a_dst = io0_a_dst + a_dst->meta.wi; |
| iop_a_dst = io1_a_dst; |
| io2_a_dst = io0_a_dst + a_dst->data.len; |
| if (a_dst->meta.closed) { |
| io2_a_dst = iop_a_dst; |
| } |
| } |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_uncompressed[0]; |
| if (coro_susp_point) { |
| v_length = self->private_data.s_decode_uncompressed[0].v_length; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| if ((self->private_impl.f_n_bits >= 8) || |
| ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7)) != |
| 0)) { |
| status = wuffs_deflate__error__internal_error_inconsistent_n_bits; |
| goto exit; |
| } |
| self->private_impl.f_n_bits = 0; |
| self->private_impl.f_bits = 0; |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| uint32_t t_0; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) { |
| t_0 = wuffs_base__load_u32le(iop_a_src); |
| iop_a_src += 4; |
| } else { |
| self->private_data.s_decode_uncompressed[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = |
| &self->private_data.s_decode_uncompressed[0].scratch; |
| uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0; |
| if (num_bits_0 == 24) { |
| t_0 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_0 += 8; |
| *scratch |= ((uint64_t)(num_bits_0)) << 56; |
| } |
| } |
| v_length = t_0; |
| } |
| if ((((v_length)&0xFFFF) + ((v_length) >> (32 - (16)))) != 65535) { |
| status = wuffs_deflate__error__inconsistent_stored_block_length; |
| goto exit; |
| } |
| v_length = ((v_length)&0xFFFF); |
| while (true) { |
| v_n_copied = wuffs_base__io_writer__copy_n_from_reader( |
| &iop_a_dst, io2_a_dst, v_length, &iop_a_src, io2_a_src); |
| if (v_length <= v_n_copied) { |
| status = NULL; |
| goto ok; |
| } |
| v_length -= v_n_copied; |
| if (((uint64_t)(io2_a_dst - iop_a_dst)) == 0) { |
| status = wuffs_base__suspension__short_write; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(3); |
| } else { |
| status = wuffs_base__suspension__short_read; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4); |
| } |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_uncompressed[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_uncompressed[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_data.s_decode_uncompressed[0].v_length = v_length; |
| |
| goto exit; |
| exit: |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func deflate.decoder.init_fixed_huffman |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__init_fixed_huffman(wuffs_deflate__decoder* self) { |
| uint32_t v_i = 0; |
| wuffs_base__status v_status = NULL; |
| |
| while (v_i < 144) { |
| self->private_data.f_code_lengths[v_i] = 8; |
| v_i += 1; |
| } |
| while (v_i < 256) { |
| self->private_data.f_code_lengths[v_i] = 9; |
| v_i += 1; |
| } |
| while (v_i < 280) { |
| self->private_data.f_code_lengths[v_i] = 7; |
| v_i += 1; |
| } |
| while (v_i < 288) { |
| self->private_data.f_code_lengths[v_i] = 8; |
| v_i += 1; |
| } |
| while (v_i < 320) { |
| self->private_data.f_code_lengths[v_i] = 5; |
| v_i += 1; |
| } |
| v_status = wuffs_deflate__decoder__init_huff(self, 0, 0, 288, 257); |
| if (wuffs_base__status__is_error(v_status)) { |
| return v_status; |
| } |
| v_status = wuffs_deflate__decoder__init_huff(self, 1, 288, 320, 0); |
| if (wuffs_base__status__is_error(v_status)) { |
| return v_status; |
| } |
| return NULL; |
| } |
| |
| // -------- func deflate.decoder.init_dynamic_huffman |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__init_dynamic_huffman(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint32_t v_bits = 0; |
| uint32_t v_n_bits = 0; |
| uint32_t v_b0 = 0; |
| uint32_t v_n_lit = 0; |
| uint32_t v_n_dist = 0; |
| uint32_t v_n_clen = 0; |
| uint32_t v_i = 0; |
| uint32_t v_b1 = 0; |
| wuffs_base__status v_status = NULL; |
| uint32_t v_mask = 0; |
| uint32_t v_table_entry = 0; |
| uint32_t v_table_entry_n_bits = 0; |
| uint32_t v_b2 = 0; |
| uint32_t v_n_extra_bits = 0; |
| uint8_t v_rep_symbol = 0; |
| uint32_t v_rep_count = 0; |
| uint32_t v_b3 = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_init_dynamic_huffman[0]; |
| if (coro_susp_point) { |
| v_bits = self->private_data.s_init_dynamic_huffman[0].v_bits; |
| v_n_bits = self->private_data.s_init_dynamic_huffman[0].v_n_bits; |
| v_n_lit = self->private_data.s_init_dynamic_huffman[0].v_n_lit; |
| v_n_dist = self->private_data.s_init_dynamic_huffman[0].v_n_dist; |
| v_n_clen = self->private_data.s_init_dynamic_huffman[0].v_n_clen; |
| v_i = self->private_data.s_init_dynamic_huffman[0].v_i; |
| v_mask = self->private_data.s_init_dynamic_huffman[0].v_mask; |
| v_table_entry = self->private_data.s_init_dynamic_huffman[0].v_table_entry; |
| v_n_extra_bits = |
| self->private_data.s_init_dynamic_huffman[0].v_n_extra_bits; |
| v_rep_symbol = self->private_data.s_init_dynamic_huffman[0].v_rep_symbol; |
| v_rep_count = self->private_data.s_init_dynamic_huffman[0].v_rep_count; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| v_bits = self->private_impl.f_bits; |
| v_n_bits = self->private_impl.f_n_bits; |
| while (v_n_bits < 14) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_0 = *iop_a_src++; |
| v_b0 = t_0; |
| } |
| v_bits |= (v_b0 << v_n_bits); |
| v_n_bits += 8; |
| } |
| v_n_lit = (((v_bits)&0x1F) + 257); |
| if (v_n_lit > 286) { |
| status = wuffs_deflate__error__bad_literal_length_code_count; |
| goto exit; |
| } |
| v_bits >>= 5; |
| v_n_dist = (((v_bits)&0x1F) + 1); |
| if (v_n_dist > 30) { |
| status = wuffs_deflate__error__bad_distance_code_count; |
| goto exit; |
| } |
| v_bits >>= 5; |
| v_n_clen = (((v_bits)&0xF) + 4); |
| v_bits >>= 4; |
| v_n_bits -= 14; |
| v_i = 0; |
| while (v_i < v_n_clen) { |
| while (v_n_bits < 3) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_1 = *iop_a_src++; |
| v_b1 = t_1; |
| } |
| v_bits |= (v_b1 << v_n_bits); |
| v_n_bits += 8; |
| } |
| self->private_data.f_code_lengths[wuffs_deflate__code_order[v_i]] = |
| ((uint8_t)((v_bits & 7))); |
| v_bits >>= 3; |
| v_n_bits -= 3; |
| v_i += 1; |
| } |
| while (v_i < 19) { |
| self->private_data.f_code_lengths[wuffs_deflate__code_order[v_i]] = 0; |
| v_i += 1; |
| } |
| v_status = wuffs_deflate__decoder__init_huff(self, 0, 0, 19, 4095); |
| if (wuffs_base__status__is_error(v_status)) { |
| status = v_status; |
| goto exit; |
| } |
| v_mask = ((((uint32_t)(1)) << self->private_impl.f_n_huffs_bits[0]) - 1); |
| v_i = 0; |
| label_0_continue:; |
| while (v_i < (v_n_lit + v_n_dist)) { |
| while (true) { |
| v_table_entry = self->private_data.f_huffs[0][(v_bits & v_mask)]; |
| v_table_entry_n_bits = (v_table_entry & 15); |
| if (v_n_bits >= v_table_entry_n_bits) { |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| goto label_1_break; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_2 = *iop_a_src++; |
| v_b2 = t_2; |
| } |
| v_bits |= (v_b2 << v_n_bits); |
| v_n_bits += 8; |
| } |
| label_1_break:; |
| if ((v_table_entry >> 24) != 128) { |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } |
| v_table_entry = ((v_table_entry >> 8) & 255); |
| if (v_table_entry < 16) { |
| self->private_data.f_code_lengths[v_i] = ((uint8_t)(v_table_entry)); |
| v_i += 1; |
| goto label_0_continue; |
| } |
| v_n_extra_bits = 0; |
| v_rep_symbol = 0; |
| v_rep_count = 0; |
| if (v_table_entry == 16) { |
| v_n_extra_bits = 2; |
| if (v_i <= 0) { |
| status = wuffs_deflate__error__bad_huffman_code_length_repetition; |
| goto exit; |
| } |
| v_rep_symbol = (self->private_data.f_code_lengths[(v_i - 1)] & 15); |
| v_rep_count = 3; |
| } else if (v_table_entry == 17) { |
| v_n_extra_bits = 3; |
| v_rep_symbol = 0; |
| v_rep_count = 3; |
| } else if (v_table_entry == 18) { |
| v_n_extra_bits = 7; |
| v_rep_symbol = 0; |
| v_rep_count = 11; |
| } else { |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } |
| while (v_n_bits < v_n_extra_bits) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_3 = *iop_a_src++; |
| v_b3 = t_3; |
| } |
| v_bits |= (v_b3 << v_n_bits); |
| v_n_bits += 8; |
| } |
| v_rep_count += ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32(v_n_extra_bits)); |
| v_bits >>= v_n_extra_bits; |
| v_n_bits -= v_n_extra_bits; |
| while (v_rep_count > 0) { |
| if (v_i >= (v_n_lit + v_n_dist)) { |
| status = wuffs_deflate__error__bad_huffman_code_length_count; |
| goto exit; |
| } |
| self->private_data.f_code_lengths[v_i] = v_rep_symbol; |
| v_i += 1; |
| v_rep_count -= 1; |
| } |
| } |
| if (v_i != (v_n_lit + v_n_dist)) { |
| status = wuffs_deflate__error__bad_huffman_code_length_count; |
| goto exit; |
| } |
| if (self->private_data.f_code_lengths[256] == 0) { |
| status = wuffs_deflate__error__missing_end_of_block_code; |
| goto exit; |
| } |
| v_status = wuffs_deflate__decoder__init_huff(self, 0, 0, v_n_lit, 257); |
| if (wuffs_base__status__is_error(v_status)) { |
| status = v_status; |
| goto exit; |
| } |
| v_status = wuffs_deflate__decoder__init_huff(self, 1, v_n_lit, |
| (v_n_lit + v_n_dist), 0); |
| if (wuffs_base__status__is_error(v_status)) { |
| status = v_status; |
| goto exit; |
| } |
| self->private_impl.f_bits = v_bits; |
| self->private_impl.f_n_bits = v_n_bits; |
| |
| goto ok; |
| ok: |
| self->private_impl.p_init_dynamic_huffman[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_init_dynamic_huffman[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_data.s_init_dynamic_huffman[0].v_bits = v_bits; |
| self->private_data.s_init_dynamic_huffman[0].v_n_bits = v_n_bits; |
| self->private_data.s_init_dynamic_huffman[0].v_n_lit = v_n_lit; |
| self->private_data.s_init_dynamic_huffman[0].v_n_dist = v_n_dist; |
| self->private_data.s_init_dynamic_huffman[0].v_n_clen = v_n_clen; |
| self->private_data.s_init_dynamic_huffman[0].v_i = v_i; |
| self->private_data.s_init_dynamic_huffman[0].v_mask = v_mask; |
| self->private_data.s_init_dynamic_huffman[0].v_table_entry = v_table_entry; |
| self->private_data.s_init_dynamic_huffman[0].v_n_extra_bits = v_n_extra_bits; |
| self->private_data.s_init_dynamic_huffman[0].v_rep_symbol = v_rep_symbol; |
| self->private_data.s_init_dynamic_huffman[0].v_rep_count = v_rep_count; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func deflate.decoder.init_huff |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__init_huff(wuffs_deflate__decoder* self, |
| uint32_t a_which, |
| uint32_t a_n_codes0, |
| uint32_t a_n_codes1, |
| uint32_t a_base_symbol) { |
| uint16_t v_counts[16] = {0}; |
| uint32_t v_i = 0; |
| uint32_t v_remaining = 0; |
| uint16_t v_offsets[16] = {0}; |
| uint32_t v_n_symbols = 0; |
| uint32_t v_count = 0; |
| uint16_t v_symbols[320] = {0}; |
| uint32_t v_min_cl = 0; |
| uint32_t v_max_cl = 0; |
| uint32_t v_initial_high_bits = 0; |
| uint32_t v_prev_cl = 0; |
| uint32_t v_prev_redirect_key = 0; |
| uint32_t v_top = 0; |
| uint32_t v_next_top = 0; |
| uint32_t v_code = 0; |
| uint32_t v_key = 0; |
| uint32_t v_value = 0; |
| uint32_t v_cl = 0; |
| uint32_t v_redirect_key = 0; |
| uint32_t v_j = 0; |
| uint32_t v_reversed_key = 0; |
| uint32_t v_symbol = 0; |
| uint32_t v_high_bits = 0; |
| uint32_t v_delta = 0; |
| |
| v_i = a_n_codes0; |
| while (v_i < a_n_codes1) { |
| if (v_counts[(self->private_data.f_code_lengths[v_i] & 15)] >= 320) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wconversion" |
| #endif |
| v_counts[(self->private_data.f_code_lengths[v_i] & 15)] += 1; |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| v_i += 1; |
| } |
| if ((((uint32_t)(v_counts[0])) + a_n_codes0) == a_n_codes1) { |
| return wuffs_deflate__error__no_huffman_codes; |
| } |
| v_remaining = 1; |
| v_i = 1; |
| while (v_i <= 15) { |
| if (v_remaining > 1073741824) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_remaining <<= 1; |
| if (v_remaining < ((uint32_t)(v_counts[v_i]))) { |
| return wuffs_deflate__error__bad_huffman_code_over_subscribed; |
| } |
| v_remaining -= ((uint32_t)(v_counts[v_i])); |
| v_i += 1; |
| } |
| if (v_remaining != 0) { |
| if ((a_which == 1) && (v_counts[1] == 1) && |
| (self->private_data.f_code_lengths[a_n_codes0] == 1) && |
| ((((uint32_t)(v_counts[0])) + a_n_codes0 + 1) == a_n_codes1)) { |
| self->private_impl.f_n_huffs_bits[1] = 1; |
| self->private_data.f_huffs[1][0] = |
| (wuffs_deflate__dcode_magic_numbers[0] | 1); |
| self->private_data.f_huffs[1][1] = |
| (wuffs_deflate__dcode_magic_numbers[31] | 1); |
| return NULL; |
| } |
| return wuffs_deflate__error__bad_huffman_code_under_subscribed; |
| } |
| v_i = 1; |
| while (v_i <= 15) { |
| v_offsets[v_i] = ((uint16_t)(v_n_symbols)); |
| v_count = ((uint32_t)(v_counts[v_i])); |
| if (v_n_symbols > (320 - v_count)) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_n_symbols = (v_n_symbols + v_count); |
| v_i += 1; |
| } |
| if (v_n_symbols > 288) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_i = a_n_codes0; |
| while (v_i < a_n_codes1) { |
| if (v_i < a_n_codes0) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| if (self->private_data.f_code_lengths[v_i] != 0) { |
| if (v_offsets[(self->private_data.f_code_lengths[v_i] & 15)] >= 320) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_symbols[v_offsets[(self->private_data.f_code_lengths[v_i] & 15)]] = |
| ((uint16_t)((v_i - a_n_codes0))); |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wconversion" |
| #endif |
| v_offsets[(self->private_data.f_code_lengths[v_i] & 15)] += 1; |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| } |
| v_i += 1; |
| } |
| v_min_cl = 1; |
| while (true) { |
| if (v_counts[v_min_cl] != 0) { |
| goto label_0_break; |
| } |
| if (v_min_cl >= 9) { |
| return wuffs_deflate__error__bad_huffman_minimum_code_length; |
| } |
| v_min_cl += 1; |
| } |
| label_0_break:; |
| v_max_cl = 15; |
| while (true) { |
| if (v_counts[v_max_cl] != 0) { |
| goto label_1_break; |
| } |
| if (v_max_cl <= 1) { |
| return wuffs_deflate__error__no_huffman_codes; |
| } |
| v_max_cl -= 1; |
| } |
| label_1_break:; |
| if (v_max_cl <= 9) { |
| self->private_impl.f_n_huffs_bits[a_which] = v_max_cl; |
| } else { |
| self->private_impl.f_n_huffs_bits[a_which] = 9; |
| } |
| v_i = 0; |
| if ((v_n_symbols != ((uint32_t)(v_offsets[v_max_cl]))) || |
| (v_n_symbols != ((uint32_t)(v_offsets[15])))) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| if ((a_n_codes0 + ((uint32_t)(v_symbols[0]))) >= 320) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_initial_high_bits = 512; |
| if (v_max_cl < 9) { |
| v_initial_high_bits = (((uint32_t)(1)) << v_max_cl); |
| } |
| v_prev_cl = ((uint32_t)((self->private_data.f_code_lengths[( |
| a_n_codes0 + ((uint32_t)(v_symbols[0])))] & |
| 15))); |
| v_prev_redirect_key = 4294967295; |
| v_top = 0; |
| v_next_top = 512; |
| v_code = 0; |
| v_key = 0; |
| v_value = 0; |
| while (true) { |
| if ((a_n_codes0 + ((uint32_t)(v_symbols[v_i]))) >= 320) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_cl = ((uint32_t)((self->private_data.f_code_lengths[( |
| a_n_codes0 + ((uint32_t)(v_symbols[v_i])))] & |
| 15))); |
| if (v_cl > v_prev_cl) { |
| v_code <<= (v_cl - v_prev_cl); |
| if (v_code >= 32768) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| } |
| v_prev_cl = v_cl; |
| v_key = v_code; |
| if (v_cl > 9) { |
| v_cl -= 9; |
| v_redirect_key = ((v_key >> v_cl) & 511); |
| v_key = ((v_key)&WUFFS_BASE__LOW_BITS_MASK__U32(v_cl)); |
| if (v_prev_redirect_key != v_redirect_key) { |
| v_prev_redirect_key = v_redirect_key; |
| v_remaining = (((uint32_t)(1)) << v_cl); |
| v_j = v_prev_cl; |
| while (v_j <= 15) { |
| if (v_remaining <= ((uint32_t)(v_counts[v_j]))) { |
| goto label_2_break; |
| } |
| v_remaining -= ((uint32_t)(v_counts[v_j])); |
| if (v_remaining > 1073741824) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_remaining <<= 1; |
| v_j += 1; |
| } |
| label_2_break:; |
| if ((v_j <= 9) || (15 < v_j)) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_j -= 9; |
| v_initial_high_bits = (((uint32_t)(1)) << v_j); |
| v_top = v_next_top; |
| if ((v_top + (((uint32_t)(1)) << v_j)) > 1024) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_next_top = (v_top + (((uint32_t)(1)) << v_j)); |
| v_redirect_key = |
| (((uint32_t)(wuffs_deflate__reverse8[(v_redirect_key >> 1)])) | |
| ((v_redirect_key & 1) << 8)); |
| self->private_data.f_huffs[a_which][v_redirect_key] = |
| (268435465 | (v_top << 8) | (v_j << 4)); |
| } |
| } |
| if ((v_key >= 512) || (v_counts[v_prev_cl] <= 0)) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wconversion" |
| #endif |
| v_counts[v_prev_cl] -= 1; |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| v_reversed_key = (((uint32_t)(wuffs_deflate__reverse8[(v_key >> 1)])) | |
| ((v_key & 1) << 8)); |
| v_reversed_key >>= (9 - v_cl); |
| v_symbol = ((uint32_t)(v_symbols[v_i])); |
| if (v_symbol == 256) { |
| v_value = (536870912 | v_cl); |
| } else if ((v_symbol < 256) && (a_which == 0)) { |
| v_value = (2147483648 | (v_symbol << 8) | v_cl); |
| } else if (v_symbol >= a_base_symbol) { |
| v_symbol -= a_base_symbol; |
| if (a_which == 0) { |
| v_value = (wuffs_deflate__lcode_magic_numbers[(v_symbol & 31)] | v_cl); |
| } else { |
| v_value = (wuffs_deflate__dcode_magic_numbers[(v_symbol & 31)] | v_cl); |
| } |
| } else { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| v_high_bits = v_initial_high_bits; |
| v_delta = (((uint32_t)(1)) << v_cl); |
| while (v_high_bits >= v_delta) { |
| v_high_bits -= v_delta; |
| if ((v_top + ((v_high_bits | v_reversed_key) & 511)) >= 1024) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| self->private_data |
| .f_huffs[a_which][(v_top + ((v_high_bits | v_reversed_key) & 511))] = |
| v_value; |
| } |
| v_i += 1; |
| if (v_i >= v_n_symbols) { |
| goto label_3_break; |
| } |
| v_code += 1; |
| if (v_code >= 32768) { |
| return wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| } |
| } |
| label_3_break:; |
| return NULL; |
| } |
| |
| // -------- func deflate.decoder.decode_huffman_fast |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__decode_huffman_fast(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint32_t v_bits = 0; |
| uint32_t v_n_bits = 0; |
| uint32_t v_table_entry = 0; |
| uint32_t v_table_entry_n_bits = 0; |
| uint32_t v_lmask = 0; |
| uint32_t v_dmask = 0; |
| uint32_t v_redir_top = 0; |
| uint32_t v_redir_mask = 0; |
| uint32_t v_length = 0; |
| uint32_t v_dist_minus_1 = 0; |
| uint32_t v_n_copied = 0; |
| uint32_t v_hlen = 0; |
| uint32_t v_hdist = 0; |
| |
| uint8_t* iop_a_dst = NULL; |
| uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_dst) { |
| io0_a_dst = a_dst->data.ptr; |
| io1_a_dst = io0_a_dst + a_dst->meta.wi; |
| iop_a_dst = io1_a_dst; |
| io2_a_dst = io0_a_dst + a_dst->data.len; |
| if (a_dst->meta.closed) { |
| io2_a_dst = iop_a_dst; |
| } |
| } |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| if ((self->private_impl.f_n_bits >= 8) || |
| ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7)) != 0)) { |
| status = wuffs_deflate__error__internal_error_inconsistent_n_bits; |
| goto exit; |
| } |
| v_bits = self->private_impl.f_bits; |
| v_n_bits = self->private_impl.f_n_bits; |
| v_lmask = ((((uint32_t)(1)) << self->private_impl.f_n_huffs_bits[0]) - 1); |
| v_dmask = ((((uint32_t)(1)) << self->private_impl.f_n_huffs_bits[1]) - 1); |
| label_0_continue:; |
| while ((((uint64_t)(io2_a_dst - iop_a_dst)) >= 258) && |
| (((uint64_t)(io2_a_src - iop_a_src)) >= 12)) { |
| if (v_n_bits < 15) { |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| } else { |
| } |
| v_table_entry = self->private_data.f_huffs[0][(v_bits & v_lmask)]; |
| v_table_entry_n_bits = (v_table_entry & 15); |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| if ((v_table_entry >> 31) != 0) { |
| (wuffs_base__store_u8be(iop_a_dst, |
| ((uint8_t)(((v_table_entry >> 8) & 255)))), |
| iop_a_dst += 1, wuffs_base__make_empty_struct()); |
| goto label_0_continue; |
| } else if ((v_table_entry >> 30) != 0) { |
| } else if ((v_table_entry >> 29) != 0) { |
| self->private_impl.f_end_of_block = true; |
| goto label_0_break; |
| } else if ((v_table_entry >> 28) != 0) { |
| if (v_n_bits < 15) { |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| } else { |
| } |
| v_redir_top = ((v_table_entry >> 8) & 65535); |
| v_redir_mask = ((((uint32_t)(1)) << ((v_table_entry >> 4) & 15)) - 1); |
| v_table_entry = |
| self->private_data |
| .f_huffs[0][((v_redir_top + (v_bits & v_redir_mask)) & 1023)]; |
| v_table_entry_n_bits = (v_table_entry & 15); |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| if ((v_table_entry >> 31) != 0) { |
| (wuffs_base__store_u8be(iop_a_dst, |
| ((uint8_t)(((v_table_entry >> 8) & 255)))), |
| iop_a_dst += 1, wuffs_base__make_empty_struct()); |
| goto label_0_continue; |
| } else if ((v_table_entry >> 30) != 0) { |
| } else if ((v_table_entry >> 29) != 0) { |
| self->private_impl.f_end_of_block = true; |
| goto label_0_break; |
| } else if ((v_table_entry >> 28) != 0) { |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } else if ((v_table_entry >> 27) != 0) { |
| status = wuffs_deflate__error__bad_huffman_code; |
| goto exit; |
| } else { |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } |
| } else if ((v_table_entry >> 27) != 0) { |
| status = wuffs_deflate__error__bad_huffman_code; |
| goto exit; |
| } else { |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } |
| v_length = (((v_table_entry >> 8) & 255) + 3); |
| v_table_entry_n_bits = ((v_table_entry >> 4) & 15); |
| if (v_table_entry_n_bits > 0) { |
| if (v_n_bits < 15) { |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| } else { |
| } |
| v_length = |
| (((v_length + 253 + |
| ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & |
| 255) + |
| 3); |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| } else { |
| } |
| if (v_n_bits < 15) { |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| } else { |
| } |
| v_table_entry = self->private_data.f_huffs[1][(v_bits & v_dmask)]; |
| v_table_entry_n_bits = (v_table_entry & 15); |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| if ((v_table_entry >> 28) == 1) { |
| if (v_n_bits < 15) { |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| } else { |
| } |
| v_redir_top = ((v_table_entry >> 8) & 65535); |
| v_redir_mask = ((((uint32_t)(1)) << ((v_table_entry >> 4) & 15)) - 1); |
| v_table_entry = |
| self->private_data |
| .f_huffs[1][((v_redir_top + (v_bits & v_redir_mask)) & 1023)]; |
| v_table_entry_n_bits = (v_table_entry & 15); |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| } else { |
| } |
| if ((v_table_entry >> 24) != 64) { |
| if ((v_table_entry >> 24) == 8) { |
| status = wuffs_deflate__error__bad_huffman_code; |
| goto exit; |
| } |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } |
| v_dist_minus_1 = ((v_table_entry >> 8) & 32767); |
| v_table_entry_n_bits = ((v_table_entry >> 4) & 15); |
| if (v_n_bits < v_table_entry_n_bits) { |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| } |
| v_dist_minus_1 = |
| ((v_dist_minus_1 + |
| ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & |
| 32767); |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| v_n_copied = 0; |
| while (true) { |
| if (((uint64_t)((v_dist_minus_1 + 1))) > |
| ((uint64_t)(iop_a_dst - io0_a_dst))) { |
| v_hlen = 0; |
| v_hdist = ((uint32_t)((((uint64_t)((v_dist_minus_1 + 1))) - |
| ((uint64_t)(iop_a_dst - io0_a_dst))))); |
| if (v_length > v_hdist) { |
| v_length -= v_hdist; |
| v_hlen = v_hdist; |
| } else { |
| v_hlen = v_length; |
| v_length = 0; |
| } |
| if (self->private_impl.f_history_index < v_hdist) { |
| status = wuffs_deflate__error__bad_distance; |
| goto exit; |
| } |
| v_hdist = (self->private_impl.f_history_index - v_hdist); |
| while (true) { |
| v_n_copied = wuffs_base__io_writer__copy_n_from_slice( |
| &iop_a_dst, io2_a_dst, v_hlen, |
| wuffs_base__slice_u8__subslice_i( |
| wuffs_base__make_slice_u8(self->private_data.f_history, |
| 32768), |
| (v_hdist & 32767))); |
| if (v_hlen <= v_n_copied) { |
| goto label_1_break; |
| } |
| v_hlen -= v_n_copied; |
| wuffs_base__io_writer__copy_n_from_slice( |
| &iop_a_dst, io2_a_dst, v_hlen, |
| wuffs_base__make_slice_u8(self->private_data.f_history, 32768)); |
| goto label_1_break; |
| } |
| label_1_break:; |
| if (v_length == 0) { |
| goto label_0_continue; |
| } |
| if (((uint64_t)((v_dist_minus_1 + 1))) > |
| ((uint64_t)(iop_a_dst - io0_a_dst))) { |
| status = wuffs_deflate__error__internal_error_inconsistent_distance; |
| goto exit; |
| } |
| } |
| wuffs_base__io_writer__copy_n_from_history_fast( |
| &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1)); |
| goto label_2_break; |
| } |
| label_2_break:; |
| } |
| label_0_break:; |
| while (v_n_bits >= 8) { |
| v_n_bits -= 8; |
| if (iop_a_src > io1_a_src) { |
| (iop_a_src--, wuffs_base__make_empty_struct()); |
| } else { |
| status = wuffs_deflate__error__internal_error_inconsistent_i_o; |
| goto exit; |
| } |
| } |
| self->private_impl.f_bits = (v_bits & ((((uint32_t)(1)) << v_n_bits) - 1)); |
| self->private_impl.f_n_bits = v_n_bits; |
| if ((self->private_impl.f_n_bits >= 8) || |
| ((self->private_impl.f_bits >> self->private_impl.f_n_bits) != 0)) { |
| status = wuffs_deflate__error__internal_error_inconsistent_n_bits; |
| goto exit; |
| } |
| goto exit; |
| exit: |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func deflate.decoder.decode_huffman_slow |
| |
| static wuffs_base__status // |
| wuffs_deflate__decoder__decode_huffman_slow(wuffs_deflate__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint32_t v_bits = 0; |
| uint32_t v_n_bits = 0; |
| uint32_t v_table_entry = 0; |
| uint32_t v_table_entry_n_bits = 0; |
| uint32_t v_lmask = 0; |
| uint32_t v_dmask = 0; |
| uint32_t v_b0 = 0; |
| uint32_t v_redir_top = 0; |
| uint32_t v_redir_mask = 0; |
| uint32_t v_b1 = 0; |
| uint32_t v_length = 0; |
| uint32_t v_b2 = 0; |
| uint32_t v_b3 = 0; |
| uint32_t v_b4 = 0; |
| uint32_t v_dist_minus_1 = 0; |
| uint32_t v_b5 = 0; |
| uint32_t v_n_copied = 0; |
| uint32_t v_hlen = 0; |
| uint32_t v_hdist = 0; |
| |
| uint8_t* iop_a_dst = NULL; |
| uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_dst) { |
| io0_a_dst = a_dst->data.ptr; |
| io1_a_dst = io0_a_dst + a_dst->meta.wi; |
| iop_a_dst = io1_a_dst; |
| io2_a_dst = io0_a_dst + a_dst->data.len; |
| if (a_dst->meta.closed) { |
| io2_a_dst = iop_a_dst; |
| } |
| } |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_huffman_slow[0]; |
| if (coro_susp_point) { |
| v_bits = self->private_data.s_decode_huffman_slow[0].v_bits; |
| v_n_bits = self->private_data.s_decode_huffman_slow[0].v_n_bits; |
| v_table_entry = self->private_data.s_decode_huffman_slow[0].v_table_entry; |
| v_table_entry_n_bits = |
| self->private_data.s_decode_huffman_slow[0].v_table_entry_n_bits; |
| v_lmask = self->private_data.s_decode_huffman_slow[0].v_lmask; |
| v_dmask = self->private_data.s_decode_huffman_slow[0].v_dmask; |
| v_redir_top = self->private_data.s_decode_huffman_slow[0].v_redir_top; |
| v_redir_mask = self->private_data.s_decode_huffman_slow[0].v_redir_mask; |
| v_length = self->private_data.s_decode_huffman_slow[0].v_length; |
| v_dist_minus_1 = self->private_data.s_decode_huffman_slow[0].v_dist_minus_1; |
| v_hlen = self->private_data.s_decode_huffman_slow[0].v_hlen; |
| v_hdist = self->private_data.s_decode_huffman_slow[0].v_hdist; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| if ((self->private_impl.f_n_bits >= 8) || |
| ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7)) != |
| 0)) { |
| status = wuffs_deflate__error__internal_error_inconsistent_n_bits; |
| goto exit; |
| } |
| v_bits = self->private_impl.f_bits; |
| v_n_bits = self->private_impl.f_n_bits; |
| v_lmask = ((((uint32_t)(1)) << self->private_impl.f_n_huffs_bits[0]) - 1); |
| v_dmask = ((((uint32_t)(1)) << self->private_impl.f_n_huffs_bits[1]) - 1); |
| label_0_continue:; |
| while (!(self->private_impl.p_decode_huffman_slow[0] != 0)) { |
| while (true) { |
| v_table_entry = self->private_data.f_huffs[0][(v_bits & v_lmask)]; |
| v_table_entry_n_bits = (v_table_entry & 15); |
| if (v_n_bits >= v_table_entry_n_bits) { |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| goto label_1_break; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_0 = *iop_a_src++; |
| v_b0 = t_0; |
| } |
| v_bits |= (v_b0 << v_n_bits); |
| v_n_bits += 8; |
| } |
| label_1_break:; |
| if ((v_table_entry >> 31) != 0) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| if (iop_a_dst == io2_a_dst) { |
| status = wuffs_base__suspension__short_write; |
| goto suspend; |
| } |
| *iop_a_dst++ = ((uint8_t)(((v_table_entry >> 8) & 255))); |
| goto label_0_continue; |
| } else if ((v_table_entry >> 30) != 0) { |
| } else if ((v_table_entry >> 29) != 0) { |
| self->private_impl.f_end_of_block = true; |
| goto label_0_break; |
| } else if ((v_table_entry >> 28) != 0) { |
| v_redir_top = ((v_table_entry >> 8) & 65535); |
| v_redir_mask = ((((uint32_t)(1)) << ((v_table_entry >> 4) & 15)) - 1); |
| while (true) { |
| v_table_entry = |
| self->private_data |
| .f_huffs[0][((v_redir_top + (v_bits & v_redir_mask)) & 1023)]; |
| v_table_entry_n_bits = (v_table_entry & 15); |
| if (v_n_bits >= v_table_entry_n_bits) { |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| goto label_2_break; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_1 = *iop_a_src++; |
| v_b1 = t_1; |
| } |
| v_bits |= (v_b1 << v_n_bits); |
| v_n_bits += 8; |
| } |
| label_2_break:; |
| if ((v_table_entry >> 31) != 0) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| if (iop_a_dst == io2_a_dst) { |
| status = wuffs_base__suspension__short_write; |
| goto suspend; |
| } |
| *iop_a_dst++ = ((uint8_t)(((v_table_entry >> 8) & 255))); |
| goto label_0_continue; |
| } else if ((v_table_entry >> 30) != 0) { |
| } else if ((v_table_entry >> 29) != 0) { |
| self->private_impl.f_end_of_block = true; |
| goto label_0_break; |
| } else if ((v_table_entry >> 28) != 0) { |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } else if ((v_table_entry >> 27) != 0) { |
| status = wuffs_deflate__error__bad_huffman_code; |
| goto exit; |
| } else { |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } |
| } else if ((v_table_entry >> 27) != 0) { |
| status = wuffs_deflate__error__bad_huffman_code; |
| goto exit; |
| } else { |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } |
| v_length = (((v_table_entry >> 8) & 255) + 3); |
| v_table_entry_n_bits = ((v_table_entry >> 4) & 15); |
| if (v_table_entry_n_bits > 0) { |
| while (v_n_bits < v_table_entry_n_bits) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_2 = *iop_a_src++; |
| v_b2 = t_2; |
| } |
| v_bits |= (v_b2 << v_n_bits); |
| v_n_bits += 8; |
| } |
| v_length = (((v_length + 253 + |
| ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32( |
| v_table_entry_n_bits))) & |
| 255) + |
| 3); |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| } |
| while (true) { |
| v_table_entry = self->private_data.f_huffs[1][(v_bits & v_dmask)]; |
| v_table_entry_n_bits = (v_table_entry & 15); |
| if (v_n_bits >= v_table_entry_n_bits) { |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| goto label_3_break; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_3 = *iop_a_src++; |
| v_b3 = t_3; |
| } |
| v_bits |= (v_b3 << v_n_bits); |
| v_n_bits += 8; |
| } |
| label_3_break:; |
| if ((v_table_entry >> 28) == 1) { |
| v_redir_top = ((v_table_entry >> 8) & 65535); |
| v_redir_mask = ((((uint32_t)(1)) << ((v_table_entry >> 4) & 15)) - 1); |
| while (true) { |
| v_table_entry = |
| self->private_data |
| .f_huffs[1][((v_redir_top + (v_bits & v_redir_mask)) & 1023)]; |
| v_table_entry_n_bits = (v_table_entry & 15); |
| if (v_n_bits >= v_table_entry_n_bits) { |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| goto label_4_break; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_4 = *iop_a_src++; |
| v_b4 = t_4; |
| } |
| v_bits |= (v_b4 << v_n_bits); |
| v_n_bits += 8; |
| } |
| label_4_break:; |
| } |
| if ((v_table_entry >> 24) != 64) { |
| if ((v_table_entry >> 24) == 8) { |
| status = wuffs_deflate__error__bad_huffman_code; |
| goto exit; |
| } |
| status = |
| wuffs_deflate__error__internal_error_inconsistent_huffman_decoder_state; |
| goto exit; |
| } |
| v_dist_minus_1 = ((v_table_entry >> 8) & 32767); |
| v_table_entry_n_bits = ((v_table_entry >> 4) & 15); |
| if (v_table_entry_n_bits > 0) { |
| while (v_n_bits < v_table_entry_n_bits) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint32_t t_5 = *iop_a_src++; |
| v_b5 = t_5; |
| } |
| v_bits |= (v_b5 << v_n_bits); |
| v_n_bits += 8; |
| } |
| v_dist_minus_1 = |
| ((v_dist_minus_1 + |
| ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32(v_table_entry_n_bits))) & |
| 32767); |
| v_bits >>= v_table_entry_n_bits; |
| v_n_bits -= v_table_entry_n_bits; |
| } |
| while (true) { |
| if (((uint64_t)((v_dist_minus_1 + 1))) > |
| ((uint64_t)(iop_a_dst - io0_a_dst))) { |
| v_hdist = ((uint32_t)((((uint64_t)((v_dist_minus_1 + 1))) - |
| ((uint64_t)(iop_a_dst - io0_a_dst))))); |
| if (v_length > v_hdist) { |
| v_length -= v_hdist; |
| v_hlen = v_hdist; |
| } else { |
| v_hlen = v_length; |
| v_length = 0; |
| } |
| if (self->private_impl.f_history_index < v_hdist) { |
| status = wuffs_deflate__error__bad_distance; |
| goto exit; |
| } |
| v_hdist = (self->private_impl.f_history_index - v_hdist); |
| while (true) { |
| v_n_copied = wuffs_base__io_writer__copy_n_from_slice( |
| &iop_a_dst, io2_a_dst, v_hlen, |
| wuffs_base__slice_u8__subslice_i( |
| wuffs_base__make_slice_u8(self->private_data.f_history, |
| 32768), |
| (v_hdist & 32767))); |
| if (v_hlen <= v_n_copied) { |
| v_hlen = 0; |
| goto label_5_break; |
| } |
| if (v_n_copied > 0) { |
| v_hlen -= v_n_copied; |
| v_hdist = ((v_hdist + v_n_copied) & 32767); |
| if (v_hdist == 0) { |
| goto label_5_break; |
| } |
| } |
| status = wuffs_base__suspension__short_write; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(9); |
| } |
| label_5_break:; |
| if (v_hlen > 0) { |
| while (true) { |
| v_n_copied = wuffs_base__io_writer__copy_n_from_slice( |
| &iop_a_dst, io2_a_dst, v_hlen, |
| wuffs_base__slice_u8__subslice_i( |
| wuffs_base__make_slice_u8(self->private_data.f_history, |
| 32768), |
| (v_hdist & 32767))); |
| if (v_hlen <= v_n_copied) { |
| v_hlen = 0; |
| goto label_6_break; |
| } |
| v_hlen -= v_n_copied; |
| v_hdist += v_n_copied; |
| status = wuffs_base__suspension__short_write; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10); |
| } |
| label_6_break:; |
| } |
| if (v_length == 0) { |
| goto label_0_continue; |
| } |
| } |
| v_n_copied = wuffs_base__io_writer__copy_n_from_history( |
| &iop_a_dst, io0_a_dst, io2_a_dst, v_length, (v_dist_minus_1 + 1)); |
| if (v_length <= v_n_copied) { |
| v_length = 0; |
| goto label_7_break; |
| } |
| v_length -= v_n_copied; |
| status = wuffs_base__suspension__short_write; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(11); |
| } |
| label_7_break:; |
| } |
| label_0_break:; |
| self->private_impl.f_bits = v_bits; |
| self->private_impl.f_n_bits = v_n_bits; |
| if ((self->private_impl.f_n_bits >= 8) || |
| ((self->private_impl.f_bits >> (self->private_impl.f_n_bits & 7)) != |
| 0)) { |
| status = wuffs_deflate__error__internal_error_inconsistent_n_bits; |
| goto exit; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_huffman_slow[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_huffman_slow[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_data.s_decode_huffman_slow[0].v_bits = v_bits; |
| self->private_data.s_decode_huffman_slow[0].v_n_bits = v_n_bits; |
| self->private_data.s_decode_huffman_slow[0].v_table_entry = v_table_entry; |
| self->private_data.s_decode_huffman_slow[0].v_table_entry_n_bits = |
| v_table_entry_n_bits; |
| self->private_data.s_decode_huffman_slow[0].v_lmask = v_lmask; |
| self->private_data.s_decode_huffman_slow[0].v_dmask = v_dmask; |
| self->private_data.s_decode_huffman_slow[0].v_redir_top = v_redir_top; |
| self->private_data.s_decode_huffman_slow[0].v_redir_mask = v_redir_mask; |
| self->private_data.s_decode_huffman_slow[0].v_length = v_length; |
| self->private_data.s_decode_huffman_slow[0].v_dist_minus_1 = v_dist_minus_1; |
| self->private_data.s_decode_huffman_slow[0].v_hlen = v_hlen; |
| self->private_data.s_decode_huffman_slow[0].v_hdist = v_hdist; |
| |
| goto exit; |
| exit: |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| #endif // !defined(WUFFS_CONFIG__MODULES) || |
| // defined(WUFFS_CONFIG__MODULE__DEFLATE) |
| |
| #if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZW) |
| |
| // ---------------- Status Codes Implementations |
| |
| const char* wuffs_lzw__error__bad_code = "#lzw: bad code"; |
| const char* wuffs_lzw__error__internal_error_inconsistent_i_o = |
| "#lzw: internal error: inconsistent I/O"; |
| |
| // ---------------- Private Consts |
| |
| // ---------------- Private Initializer Prototypes |
| |
| // ---------------- Private Function Prototypes |
| |
| static wuffs_base__empty_struct // |
| wuffs_lzw__decoder__read_from(wuffs_lzw__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_lzw__decoder__write_to(wuffs_lzw__decoder* self, |
| wuffs_base__io_buffer* a_dst); |
| |
| // ---------------- Initializer Implementations |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_lzw__decoder__initialize(wuffs_lzw__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (sizeof(*self) != sizeof_star_self) { |
| return wuffs_base__error__bad_sizeof_receiver; |
| } |
| if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || |
| (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { |
| return wuffs_base__error__bad_wuffs_version; |
| } |
| |
| if ((initialize_flags & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) { |
| // The whole point of this if-check is to detect an uninitialized *self. |
| // We disable the warning on GCC. Clang-5.0 does not have this warning. |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wmaybe-uninitialized" |
| #endif |
| if (self->private_impl.magic != 0) { |
| return wuffs_base__error__initialize_falsely_claimed_already_zeroed; |
| } |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| } else { |
| if ((initialize_flags & |
| WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { |
| memset(self, 0, sizeof(*self)); |
| initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; |
| } else { |
| memset(&(self->private_impl), 0, sizeof(self->private_impl)); |
| } |
| } |
| |
| self->private_impl.magic = WUFFS_BASE__MAGIC; |
| return NULL; |
| } |
| |
| size_t // |
| sizeof__wuffs_lzw__decoder() { |
| return sizeof(wuffs_lzw__decoder); |
| } |
| |
| // ---------------- Function Implementations |
| |
| // -------- func lzw.decoder.set_literal_width |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_lzw__decoder__set_literal_width(wuffs_lzw__decoder* self, uint32_t a_lw) { |
| if (!self) { |
| return wuffs_base__make_empty_struct(); |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return wuffs_base__make_empty_struct(); |
| } |
| if (a_lw > 8) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| self->private_impl.f_set_literal_width_arg = (a_lw + 1); |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // -------- func lzw.decoder.workbuf_len |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_lzw__decoder__workbuf_len(const wuffs_lzw__decoder* self) { |
| if (!self) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| |
| // -------- func lzw.decoder.decode_io_writer |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_lzw__decoder__decode_io_writer(wuffs_lzw__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return (self->private_impl.magic == WUFFS_BASE__DISABLED) |
| ? wuffs_base__error__disabled_by_previous_error |
| : wuffs_base__error__initialize_not_called; |
| } |
| if (!a_dst || !a_src) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__bad_argument; |
| } |
| if ((self->private_impl.active_coroutine != 0) && |
| (self->private_impl.active_coroutine != 1)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__interleaved_coroutine_calls; |
| } |
| self->private_impl.active_coroutine = 0; |
| wuffs_base__status status = NULL; |
| |
| uint32_t v_i = 0; |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_io_writer[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| self->private_impl.f_literal_width = 8; |
| if (self->private_impl.f_set_literal_width_arg > 0) { |
| self->private_impl.f_literal_width = |
| (self->private_impl.f_set_literal_width_arg - 1); |
| } |
| self->private_impl.f_clear_code = |
| (((uint32_t)(1)) << self->private_impl.f_literal_width); |
| self->private_impl.f_end_code = (self->private_impl.f_clear_code + 1); |
| self->private_impl.f_save_code = self->private_impl.f_end_code; |
| self->private_impl.f_prev_code = self->private_impl.f_end_code; |
| self->private_impl.f_width = (self->private_impl.f_literal_width + 1); |
| self->private_impl.f_bits = 0; |
| self->private_impl.f_n_bits = 0; |
| self->private_impl.f_output_ri = 0; |
| self->private_impl.f_output_wi = 0; |
| v_i = 0; |
| while (v_i < self->private_impl.f_clear_code) { |
| self->private_data.f_lm1s[v_i] = 0; |
| self->private_data.f_suffixes[v_i][0] = ((uint8_t)(v_i)); |
| v_i += 1; |
| } |
| label_0_continue:; |
| while (true) { |
| wuffs_lzw__decoder__read_from(self, a_src); |
| if (self->private_impl.f_output_wi > 0) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| status = wuffs_lzw__decoder__write_to(self, a_dst); |
| if (status) { |
| goto suspend; |
| } |
| } |
| if (self->private_impl.f_read_from_return_value == 0) { |
| goto label_0_break; |
| } else if (self->private_impl.f_read_from_return_value == 1) { |
| goto label_0_continue; |
| } else if (self->private_impl.f_read_from_return_value == 2) { |
| status = wuffs_base__suspension__short_read; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2); |
| } else if (self->private_impl.f_read_from_return_value == 3) { |
| status = wuffs_lzw__error__bad_code; |
| goto exit; |
| } else { |
| status = wuffs_lzw__error__internal_error_inconsistent_i_o; |
| goto exit; |
| } |
| } |
| label_0_break:; |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_io_writer[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_io_writer[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_impl.active_coroutine = |
| wuffs_base__status__is_suspension(status) ? 1 : 0; |
| |
| goto exit; |
| exit: |
| if (wuffs_base__status__is_error(status)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| } |
| return status; |
| } |
| |
| // -------- func lzw.decoder.read_from |
| |
| static wuffs_base__empty_struct // |
| wuffs_lzw__decoder__read_from(wuffs_lzw__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| uint32_t v_clear_code = 0; |
| uint32_t v_end_code = 0; |
| uint32_t v_save_code = 0; |
| uint32_t v_prev_code = 0; |
| uint32_t v_width = 0; |
| uint32_t v_bits = 0; |
| uint32_t v_n_bits = 0; |
| uint32_t v_output_wi = 0; |
| uint32_t v_code = 0; |
| uint32_t v_c = 0; |
| uint32_t v_o = 0; |
| uint32_t v_steps = 0; |
| uint8_t v_first_byte = 0; |
| uint16_t v_lm1_b = 0; |
| uint16_t v_lm1_a = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| v_clear_code = self->private_impl.f_clear_code; |
| v_end_code = self->private_impl.f_end_code; |
| v_save_code = self->private_impl.f_save_code; |
| v_prev_code = self->private_impl.f_prev_code; |
| v_width = self->private_impl.f_width; |
| v_bits = self->private_impl.f_bits; |
| v_n_bits = self->private_impl.f_n_bits; |
| v_output_wi = self->private_impl.f_output_wi; |
| while (true) { |
| if (v_n_bits < v_width) { |
| if (((uint64_t)(io2_a_src - iop_a_src)) >= 4) { |
| v_bits |= (wuffs_base__load_u32le(iop_a_src) << v_n_bits); |
| (iop_a_src += ((31 - v_n_bits) >> 3), wuffs_base__make_empty_struct()); |
| v_n_bits |= 24; |
| } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { |
| self->private_impl.f_read_from_return_value = 2; |
| goto label_0_break; |
| } else { |
| v_bits |= (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| if (v_n_bits >= v_width) { |
| } else if (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { |
| self->private_impl.f_read_from_return_value = 2; |
| goto label_0_break; |
| } else { |
| v_bits |= |
| (((uint32_t)(wuffs_base__load_u8be(iop_a_src))) << v_n_bits); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| v_n_bits += 8; |
| if (v_n_bits < v_width) { |
| self->private_impl.f_read_from_return_value = 4; |
| goto label_0_break; |
| } |
| } |
| } |
| } |
| v_code = ((v_bits)&WUFFS_BASE__LOW_BITS_MASK__U32(v_width)); |
| v_bits >>= v_width; |
| v_n_bits -= v_width; |
| if (v_code < v_clear_code) { |
| self->private_data.f_output[v_output_wi] = ((uint8_t)(v_code)); |
| v_output_wi = ((v_output_wi + 1) & 8191); |
| if (v_save_code <= 4095) { |
| v_lm1_a = ((self->private_data.f_lm1s[v_prev_code] + 1) & 4095); |
| self->private_data.f_lm1s[v_save_code] = v_lm1_a; |
| if ((v_lm1_a % 8) != 0) { |
| self->private_impl.f_prefixes[v_save_code] = |
| self->private_impl.f_prefixes[v_prev_code]; |
| memcpy(self->private_data.f_suffixes[v_save_code], |
| self->private_data.f_suffixes[v_prev_code], |
| sizeof(self->private_data.f_suffixes[v_save_code])); |
| self->private_data.f_suffixes[v_save_code][(v_lm1_a % 8)] = |
| ((uint8_t)(v_code)); |
| } else { |
| self->private_impl.f_prefixes[v_save_code] = |
| ((uint16_t)(v_prev_code)); |
| self->private_data.f_suffixes[v_save_code][0] = ((uint8_t)(v_code)); |
| } |
| v_save_code += 1; |
| if (v_width < 12) { |
| v_width += (1 & (v_save_code >> v_width)); |
| } |
| v_prev_code = v_code; |
| } |
| } else if (v_code <= v_end_code) { |
| if (v_code == v_end_code) { |
| self->private_impl.f_read_from_return_value = 0; |
| goto label_0_break; |
| } |
| v_save_code = v_end_code; |
| v_prev_code = v_end_code; |
| v_width = (self->private_impl.f_literal_width + 1); |
| } else if (v_code <= v_save_code) { |
| v_c = v_code; |
| if (v_code == v_save_code) { |
| v_c = v_prev_code; |
| } |
| v_o = ((v_output_wi + |
| (((uint32_t)(self->private_data.f_lm1s[v_c])) & 4294967288)) & |
| 8191); |
| v_output_wi = |
| ((v_output_wi + 1 + ((uint32_t)(self->private_data.f_lm1s[v_c]))) & |
| 8191); |
| v_steps = (((uint32_t)(self->private_data.f_lm1s[v_c])) >> 3); |
| while (true) { |
| memcpy((self->private_data.f_output) + (v_o), |
| (self->private_data.f_suffixes[v_c]), 8); |
| if (v_steps <= 0) { |
| goto label_1_break; |
| } |
| v_steps -= 1; |
| v_o = ((v_o - 8) & 8191); |
| v_c = ((uint32_t)(self->private_impl.f_prefixes[v_c])); |
| } |
| label_1_break:; |
| v_first_byte = self->private_data.f_suffixes[v_c][0]; |
| if (v_code == v_save_code) { |
| self->private_data.f_output[v_output_wi] = v_first_byte; |
| v_output_wi = ((v_output_wi + 1) & 8191); |
| } |
| if (v_save_code <= 4095) { |
| v_lm1_b = ((self->private_data.f_lm1s[v_prev_code] + 1) & 4095); |
| self->private_data.f_lm1s[v_save_code] = v_lm1_b; |
| if ((v_lm1_b % 8) != 0) { |
| self->private_impl.f_prefixes[v_save_code] = |
| self->private_impl.f_prefixes[v_prev_code]; |
| memcpy(self->private_data.f_suffixes[v_save_code], |
| self->private_data.f_suffixes[v_prev_code], |
| sizeof(self->private_data.f_suffixes[v_save_code])); |
| self->private_data.f_suffixes[v_save_code][(v_lm1_b % 8)] = |
| v_first_byte; |
| } else { |
| self->private_impl.f_prefixes[v_save_code] = |
| ((uint16_t)(v_prev_code)); |
| self->private_data.f_suffixes[v_save_code][0] = |
| ((uint8_t)(v_first_byte)); |
| } |
| v_save_code += 1; |
| if (v_width < 12) { |
| v_width += (1 & (v_save_code >> v_width)); |
| } |
| v_prev_code = v_code; |
| } |
| } else { |
| self->private_impl.f_read_from_return_value = 3; |
| goto label_0_break; |
| } |
| if (v_output_wi > 4095) { |
| self->private_impl.f_read_from_return_value = 1; |
| goto label_0_break; |
| } |
| } |
| label_0_break:; |
| if (self->private_impl.f_read_from_return_value != 2) { |
| while (v_n_bits >= 8) { |
| v_n_bits -= 8; |
| if (iop_a_src > io1_a_src) { |
| (iop_a_src--, wuffs_base__make_empty_struct()); |
| } else { |
| self->private_impl.f_read_from_return_value = 4; |
| goto label_2_break; |
| } |
| } |
| label_2_break:; |
| } |
| self->private_impl.f_save_code = v_save_code; |
| self->private_impl.f_prev_code = v_prev_code; |
| self->private_impl.f_width = v_width; |
| self->private_impl.f_bits = v_bits; |
| self->private_impl.f_n_bits = v_n_bits; |
| self->private_impl.f_output_wi = v_output_wi; |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // -------- func lzw.decoder.write_to |
| |
| static wuffs_base__status // |
| wuffs_lzw__decoder__write_to(wuffs_lzw__decoder* self, |
| wuffs_base__io_buffer* a_dst) { |
| wuffs_base__status status = NULL; |
| |
| wuffs_base__slice_u8 v_s = {0}; |
| uint64_t v_n = 0; |
| |
| uint8_t* iop_a_dst = NULL; |
| uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_dst) { |
| io0_a_dst = a_dst->data.ptr; |
| io1_a_dst = io0_a_dst + a_dst->meta.wi; |
| iop_a_dst = io1_a_dst; |
| io2_a_dst = io0_a_dst + a_dst->data.len; |
| if (a_dst->meta.closed) { |
| io2_a_dst = iop_a_dst; |
| } |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_write_to[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| while (self->private_impl.f_output_wi > 0) { |
| if (self->private_impl.f_output_ri > self->private_impl.f_output_wi) { |
| status = wuffs_lzw__error__internal_error_inconsistent_i_o; |
| goto exit; |
| } |
| v_s = wuffs_base__slice_u8__subslice_ij( |
| wuffs_base__make_slice_u8(self->private_data.f_output, 8199), |
| self->private_impl.f_output_ri, self->private_impl.f_output_wi); |
| v_n = wuffs_base__io_writer__copy_from_slice(&iop_a_dst, io2_a_dst, v_s); |
| if (v_n == ((uint64_t)(v_s.len))) { |
| self->private_impl.f_output_ri = 0; |
| self->private_impl.f_output_wi = 0; |
| status = NULL; |
| goto ok; |
| } |
| self->private_impl.f_output_ri = |
| ((self->private_impl.f_output_ri + ((uint32_t)((v_n & 4294967295)))) & |
| 8191); |
| status = wuffs_base__suspension__short_write; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1); |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_write_to[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_write_to[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| |
| goto exit; |
| exit: |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func lzw.decoder.flush |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__slice_u8 // |
| wuffs_lzw__decoder__flush(wuffs_lzw__decoder* self) { |
| if (!self) { |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return wuffs_base__make_slice_u8(NULL, 0); |
| } |
| |
| wuffs_base__slice_u8 v_s = {0}; |
| |
| if (self->private_impl.f_output_ri <= self->private_impl.f_output_wi) { |
| v_s = wuffs_base__slice_u8__subslice_ij( |
| wuffs_base__make_slice_u8(self->private_data.f_output, 8199), |
| self->private_impl.f_output_ri, self->private_impl.f_output_wi); |
| } |
| self->private_impl.f_output_ri = 0; |
| self->private_impl.f_output_wi = 0; |
| return v_s; |
| } |
| |
| #endif // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__LZW) |
| |
| #if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GIF) |
| |
| // ---------------- Status Codes Implementations |
| |
| const char* wuffs_gif__error__bad_block = "#gif: bad block"; |
| const char* wuffs_gif__error__bad_extension_label = "#gif: bad extension label"; |
| const char* wuffs_gif__error__bad_frame_size = "#gif: bad frame size"; |
| const char* wuffs_gif__error__bad_graphic_control = "#gif: bad graphic control"; |
| const char* wuffs_gif__error__bad_header = "#gif: bad header"; |
| const char* wuffs_gif__error__bad_literal_width = "#gif: bad literal width"; |
| const char* wuffs_gif__error__bad_palette = "#gif: bad palette"; |
| const char* wuffs_gif__error__internal_error_inconsistent_ri_wi = |
| "#gif: internal error: inconsistent ri/wi"; |
| |
| // ---------------- Private Consts |
| |
| static const uint32_t // |
| wuffs_gif__interlace_start[5] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 4294967295, 1, 2, 4, 0, |
| }; |
| |
| static const uint8_t // |
| wuffs_gif__interlace_delta[5] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 1, 2, 4, 8, 8, |
| }; |
| |
| static const uint8_t // |
| wuffs_gif__interlace_count[5] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 0, 1, 2, 4, 8, |
| }; |
| |
| static const uint8_t // |
| wuffs_gif__animexts1dot0[11] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 65, 78, 73, 77, 69, 88, 84, 83, 49, 46, 48, |
| }; |
| |
| static const uint8_t // |
| wuffs_gif__netscape2dot0[11] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 78, 69, 84, 83, 67, 65, 80, 69, 50, 46, 48, |
| }; |
| |
| static const uint8_t // |
| wuffs_gif__iccrgbg1012[11] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 73, 67, 67, 82, 71, 66, 71, 49, 48, 49, 50, |
| }; |
| |
| static const uint8_t // |
| wuffs_gif__xmpdataxmp[11] // |
| WUFFS_BASE__POTENTIALLY_UNUSED = { |
| 88, 77, 80, 32, 68, 97, 116, 97, 88, 77, 80, |
| }; |
| |
| // ---------------- Private Initializer Prototypes |
| |
| // ---------------- Private Function Prototypes |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__skip_frame(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__empty_struct // |
| wuffs_gif__decoder__reset_gc(wuffs_gif__decoder* self); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_up_to_id_part1(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_header(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_lsd(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_extension(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__skip_blocks(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_ae(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_gc(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_id_part0(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_id_part1(wuffs_gif__decoder* self, |
| wuffs_base__pixel_buffer* a_dst, |
| wuffs_base__io_buffer* a_src); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_id_part2(wuffs_gif__decoder* self, |
| wuffs_base__pixel_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf); |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__copy_to_image_buffer(wuffs_gif__decoder* self, |
| wuffs_base__pixel_buffer* a_pb, |
| wuffs_base__slice_u8 a_src); |
| |
| // ---------------- Initializer Implementations |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_gif__decoder__initialize(wuffs_gif__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (sizeof(*self) != sizeof_star_self) { |
| return wuffs_base__error__bad_sizeof_receiver; |
| } |
| if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || |
| (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { |
| return wuffs_base__error__bad_wuffs_version; |
| } |
| |
| if ((initialize_flags & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) { |
| // The whole point of this if-check is to detect an uninitialized *self. |
| // We disable the warning on GCC. Clang-5.0 does not have this warning. |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wmaybe-uninitialized" |
| #endif |
| if (self->private_impl.magic != 0) { |
| return wuffs_base__error__initialize_falsely_claimed_already_zeroed; |
| } |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| } else { |
| if ((initialize_flags & |
| WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { |
| memset(self, 0, sizeof(*self)); |
| initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; |
| } else { |
| memset(&(self->private_impl), 0, sizeof(self->private_impl)); |
| } |
| } |
| |
| { |
| wuffs_base__status z = wuffs_lzw__decoder__initialize( |
| &self->private_data.f_lzw, sizeof(self->private_data.f_lzw), |
| WUFFS_VERSION, initialize_flags); |
| if (z) { |
| return z; |
| } |
| } |
| self->private_impl.magic = WUFFS_BASE__MAGIC; |
| return NULL; |
| } |
| |
| size_t // |
| sizeof__wuffs_gif__decoder() { |
| return sizeof(wuffs_gif__decoder); |
| } |
| |
| // ---------------- Function Implementations |
| |
| // -------- func gif.decoder.set_quirk_enabled |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_gif__decoder__set_quirk_enabled(wuffs_gif__decoder* self, |
| uint32_t a_quirk, |
| bool a_enabled) { |
| if (!self) { |
| return wuffs_base__make_empty_struct(); |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| if (self->private_impl.f_call_sequence == 0) { |
| if (a_quirk == 1041635328) { |
| self->private_impl.f_quirk_enabled_delay_num_decoded_frames = a_enabled; |
| } else if (a_quirk == 1041635329) { |
| self->private_impl |
| .f_quirk_enabled_first_frame_local_palette_means_black_background = |
| a_enabled; |
| } else if (a_quirk == 1041635330) { |
| self->private_impl.f_quirk_enabled_honor_background_color = a_enabled; |
| } else if (a_quirk == 1041635331) { |
| self->private_impl.f_quirk_enabled_ignore_too_much_pixel_data = a_enabled; |
| } else if (a_quirk == 1041635332) { |
| self->private_impl.f_quirk_enabled_image_bounds_are_strict = a_enabled; |
| } else if (a_quirk == 1041635333) { |
| self->private_impl.f_quirk_enabled_reject_empty_frame = a_enabled; |
| } else if (a_quirk == 1041635334) { |
| self->private_impl.f_quirk_enabled_reject_empty_palette = a_enabled; |
| } |
| } |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // -------- func gif.decoder.decode_image_config |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__decode_image_config(wuffs_gif__decoder* self, |
| wuffs_base__image_config* a_dst, |
| wuffs_base__io_buffer* a_src) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return (self->private_impl.magic == WUFFS_BASE__DISABLED) |
| ? wuffs_base__error__disabled_by_previous_error |
| : wuffs_base__error__initialize_not_called; |
| } |
| if (!a_src) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__bad_argument; |
| } |
| if ((self->private_impl.active_coroutine != 0) && |
| (self->private_impl.active_coroutine != 1)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__interleaved_coroutine_calls; |
| } |
| self->private_impl.active_coroutine = 0; |
| wuffs_base__status status = NULL; |
| |
| bool v_ffio = false; |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_image_config[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| if (self->private_impl.f_call_sequence == 0) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| status = wuffs_gif__decoder__decode_header(self, a_src); |
| if (status) { |
| goto suspend; |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| status = wuffs_gif__decoder__decode_lsd(self, a_src); |
| if (status) { |
| goto suspend; |
| } |
| } else if (self->private_impl.f_call_sequence != 2) { |
| status = wuffs_base__error__bad_call_sequence; |
| goto exit; |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| status = wuffs_gif__decoder__decode_up_to_id_part1(self, a_src); |
| if (status) { |
| goto suspend; |
| } |
| v_ffio = !self->private_impl.f_gc_has_transparent_index; |
| if (!self->private_impl.f_quirk_enabled_honor_background_color) { |
| v_ffio = |
| (v_ffio && (self->private_impl.f_frame_rect_x0 == 0) && |
| (self->private_impl.f_frame_rect_y0 == 0) && |
| (self->private_impl.f_frame_rect_x1 == self->private_impl.f_width) && |
| (self->private_impl.f_frame_rect_y1 == self->private_impl.f_height)); |
| } else if (v_ffio) { |
| self->private_impl.f_black_color_u32_argb_premul = 4278190080; |
| } |
| if (self->private_impl.f_background_color_u32_argb_premul == 77) { |
| self->private_impl.f_background_color_u32_argb_premul = |
| self->private_impl.f_black_color_u32_argb_premul; |
| } |
| if (a_dst != NULL) { |
| wuffs_base__image_config__set( |
| a_dst, 1191444488, 0, self->private_impl.f_width, |
| self->private_impl.f_height, |
| self->private_impl.f_frame_config_io_position, v_ffio); |
| } |
| self->private_impl.f_call_sequence = 3; |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_image_config[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_image_config[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_impl.active_coroutine = |
| wuffs_base__status__is_suspension(status) ? 1 : 0; |
| |
| goto exit; |
| exit: |
| if (wuffs_base__status__is_error(status)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| } |
| return status; |
| } |
| |
| // -------- func gif.decoder.set_report_metadata |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_gif__decoder__set_report_metadata(wuffs_gif__decoder* self, |
| uint32_t a_fourcc, |
| bool a_report) { |
| if (!self) { |
| return wuffs_base__make_empty_struct(); |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| if (a_fourcc == 1229144912) { |
| self->private_impl.f_report_metadata_iccp = a_report; |
| } else if (a_fourcc == 1481461792) { |
| self->private_impl.f_report_metadata_xmp = a_report; |
| } |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // -------- func gif.decoder.ack_metadata_chunk |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__ack_metadata_chunk(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return (self->private_impl.magic == WUFFS_BASE__DISABLED) |
| ? wuffs_base__error__disabled_by_previous_error |
| : wuffs_base__error__initialize_not_called; |
| } |
| if (!a_src) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__bad_argument; |
| } |
| if ((self->private_impl.active_coroutine != 0) && |
| (self->private_impl.active_coroutine != 2)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__interleaved_coroutine_calls; |
| } |
| self->private_impl.active_coroutine = 0; |
| wuffs_base__status status = NULL; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_ack_metadata_chunk[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| if (self->private_impl.f_call_sequence != 1) { |
| status = wuffs_base__error__bad_call_sequence; |
| goto exit; |
| } |
| if (wuffs_base__u64__sat_add(a_src->meta.pos, |
| ((uint64_t)(iop_a_src - io0_a_src))) != |
| self->private_impl.f_metadata_io_position) { |
| status = wuffs_base__error__bad_i_o_position; |
| goto exit; |
| } |
| if (self->private_impl.f_metadata_chunk_length_value > 0) { |
| while (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { |
| status = wuffs_base__suspension__short_read; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(1); |
| } |
| self->private_impl.f_metadata_chunk_length_value = |
| ((uint64_t)(wuffs_base__load_u8be(iop_a_src))); |
| if (self->private_impl.f_metadata_chunk_length_value > 0) { |
| if (self->private_impl.f_metadata_fourcc_value == 1481461792) { |
| self->private_impl.f_metadata_chunk_length_value += 1; |
| } else { |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| } |
| self->private_impl.f_metadata_io_position = wuffs_base__u64__sat_add( |
| wuffs_base__u64__sat_add(a_src->meta.pos, |
| ((uint64_t)(iop_a_src - io0_a_src))), |
| self->private_impl.f_metadata_chunk_length_value); |
| status = wuffs_base__warning__metadata_reported; |
| goto ok; |
| } |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| } |
| self->private_impl.f_call_sequence = 2; |
| self->private_impl.f_metadata_fourcc_value = 0; |
| self->private_impl.f_metadata_io_position = 0; |
| status = NULL; |
| goto ok; |
| goto ok; |
| ok: |
| self->private_impl.p_ack_metadata_chunk[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_ack_metadata_chunk[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_impl.active_coroutine = |
| wuffs_base__status__is_suspension(status) ? 2 : 0; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| if (wuffs_base__status__is_error(status)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| } |
| return status; |
| } |
| |
| // -------- func gif.decoder.metadata_fourcc |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_gif__decoder__metadata_fourcc(const wuffs_gif__decoder* self) { |
| if (!self) { |
| return 0; |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return 0; |
| } |
| |
| return self->private_impl.f_metadata_fourcc_value; |
| } |
| |
| // -------- func gif.decoder.metadata_chunk_length |
| |
| WUFFS_BASE__MAYBE_STATIC uint64_t // |
| wuffs_gif__decoder__metadata_chunk_length(const wuffs_gif__decoder* self) { |
| if (!self) { |
| return 0; |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return 0; |
| } |
| |
| return self->private_impl.f_metadata_chunk_length_value; |
| } |
| |
| // -------- func gif.decoder.num_animation_loops |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_gif__decoder__num_animation_loops(const wuffs_gif__decoder* self) { |
| if (!self) { |
| return 0; |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return 0; |
| } |
| |
| if (self->private_impl.f_seen_num_loops) { |
| return self->private_impl.f_num_loops; |
| } |
| return 1; |
| } |
| |
| // -------- func gif.decoder.num_decoded_frame_configs |
| |
| WUFFS_BASE__MAYBE_STATIC uint64_t // |
| wuffs_gif__decoder__num_decoded_frame_configs(const wuffs_gif__decoder* self) { |
| if (!self) { |
| return 0; |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return 0; |
| } |
| |
| return self->private_impl.f_num_decoded_frame_configs_value; |
| } |
| |
| // -------- func gif.decoder.num_decoded_frames |
| |
| WUFFS_BASE__MAYBE_STATIC uint64_t // |
| wuffs_gif__decoder__num_decoded_frames(const wuffs_gif__decoder* self) { |
| if (!self) { |
| return 0; |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return 0; |
| } |
| |
| return self->private_impl.f_num_decoded_frames_value; |
| } |
| |
| // -------- func gif.decoder.frame_dirty_rect |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__rect_ie_u32 // |
| wuffs_gif__decoder__frame_dirty_rect(const wuffs_gif__decoder* self) { |
| if (!self) { |
| return wuffs_base__utility__make_rect_ie_u32(0, 0, 0, 0); |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return wuffs_base__utility__make_rect_ie_u32(0, 0, 0, 0); |
| } |
| |
| return wuffs_base__utility__make_rect_ie_u32( |
| wuffs_base__u32__min(self->private_impl.f_frame_rect_x0, |
| self->private_impl.f_width), |
| wuffs_base__u32__min(self->private_impl.f_frame_rect_y0, |
| self->private_impl.f_height), |
| wuffs_base__u32__min(self->private_impl.f_frame_rect_x1, |
| self->private_impl.f_width), |
| wuffs_base__u32__min(self->private_impl.f_dirty_max_excl_y, |
| self->private_impl.f_height)); |
| } |
| |
| // -------- func gif.decoder.workbuf_len |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_gif__decoder__workbuf_len(const wuffs_gif__decoder* self) { |
| if (!self) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| |
| return wuffs_base__utility__make_range_ii_u64(1, 1); |
| } |
| |
| // -------- func gif.decoder.restart_frame |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__restart_frame(wuffs_gif__decoder* self, |
| uint64_t a_index, |
| uint64_t a_io_position) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return (self->private_impl.magic == WUFFS_BASE__DISABLED) |
| ? wuffs_base__error__disabled_by_previous_error |
| : wuffs_base__error__initialize_not_called; |
| } |
| |
| if (self->private_impl.f_call_sequence == 0) { |
| return wuffs_base__error__bad_call_sequence; |
| } |
| self->private_impl.f_delayed_num_decoded_frames = false; |
| self->private_impl.f_end_of_data = false; |
| self->private_impl.f_restarted = true; |
| self->private_impl.f_frame_config_io_position = a_io_position; |
| self->private_impl.f_num_decoded_frame_configs_value = a_index; |
| self->private_impl.f_num_decoded_frames_value = a_index; |
| wuffs_gif__decoder__reset_gc(self); |
| return NULL; |
| } |
| |
| // -------- func gif.decoder.decode_frame_config |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__decode_frame_config(wuffs_gif__decoder* self, |
| wuffs_base__frame_config* a_dst, |
| wuffs_base__io_buffer* a_src) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return (self->private_impl.magic == WUFFS_BASE__DISABLED) |
| ? wuffs_base__error__disabled_by_previous_error |
| : wuffs_base__error__initialize_not_called; |
| } |
| if (!a_src) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__bad_argument; |
| } |
| if ((self->private_impl.active_coroutine != 0) && |
| (self->private_impl.active_coroutine != 3)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__interleaved_coroutine_calls; |
| } |
| self->private_impl.active_coroutine = 0; |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_blend = 0; |
| uint32_t v_background_color = 0; |
| uint8_t v_flags = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_frame_config[0]; |
| if (coro_susp_point) { |
| v_blend = self->private_data.s_decode_frame_config[0].v_blend; |
| v_background_color = |
| self->private_data.s_decode_frame_config[0].v_background_color; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| self->private_impl.f_ignore_metadata = true; |
| self->private_impl.f_dirty_max_excl_y = 0; |
| if (!self->private_impl.f_end_of_data) { |
| if (self->private_impl.f_call_sequence == 0) { |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| status = wuffs_gif__decoder__decode_image_config(self, NULL, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| } else if (self->private_impl.f_call_sequence != 3) { |
| if (self->private_impl.f_call_sequence == 4) { |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| status = wuffs_gif__decoder__skip_frame(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| status = wuffs_gif__decoder__decode_up_to_id_part1(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| } |
| } |
| if (self->private_impl.f_end_of_data) { |
| status = wuffs_base__warning__end_of_data; |
| goto ok; |
| } |
| v_blend = 0; |
| v_background_color = self->private_impl.f_black_color_u32_argb_premul; |
| if (!self->private_impl.f_gc_has_transparent_index) { |
| v_blend = 2; |
| v_background_color = |
| self->private_impl.f_background_color_u32_argb_premul; |
| if (self->private_impl |
| .f_quirk_enabled_first_frame_local_palette_means_black_background && |
| (self->private_impl.f_num_decoded_frame_configs_value == 0)) { |
| while (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { |
| status = wuffs_base__suspension__short_read; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(4); |
| } |
| v_flags = wuffs_base__load_u8be(iop_a_src); |
| if ((v_flags & 128) != 0) { |
| v_background_color = self->private_impl.f_black_color_u32_argb_premul; |
| } |
| } |
| } |
| if (a_dst != NULL) { |
| wuffs_base__frame_config__update( |
| a_dst, |
| wuffs_base__utility__make_rect_ie_u32( |
| wuffs_base__u32__min(self->private_impl.f_frame_rect_x0, |
| self->private_impl.f_width), |
| wuffs_base__u32__min(self->private_impl.f_frame_rect_y0, |
| self->private_impl.f_height), |
| wuffs_base__u32__min(self->private_impl.f_frame_rect_x1, |
| self->private_impl.f_width), |
| wuffs_base__u32__min(self->private_impl.f_frame_rect_y1, |
| self->private_impl.f_height)), |
| ((wuffs_base__flicks)(self->private_impl.f_gc_duration)), |
| self->private_impl.f_num_decoded_frame_configs_value, |
| self->private_impl.f_frame_config_io_position, v_blend, |
| self->private_impl.f_gc_disposal, v_background_color); |
| } |
| wuffs_base__u64__sat_add_indirect( |
| &self->private_impl.f_num_decoded_frame_configs_value, 1); |
| self->private_impl.f_call_sequence = 4; |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_frame_config[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_frame_config[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_impl.active_coroutine = |
| wuffs_base__status__is_suspension(status) ? 3 : 0; |
| self->private_data.s_decode_frame_config[0].v_blend = v_blend; |
| self->private_data.s_decode_frame_config[0].v_background_color = |
| v_background_color; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| if (wuffs_base__status__is_error(status)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| } |
| return status; |
| } |
| |
| // -------- func gif.decoder.skip_frame |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__skip_frame(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_flags = 0; |
| uint8_t v_lw = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_skip_frame[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_0 = *iop_a_src++; |
| v_flags = t_0; |
| } |
| if ((v_flags & 128) != 0) { |
| self->private_data.s_skip_frame[0].scratch = |
| (((uint32_t)(3)) << (1 + (v_flags & 7))); |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| if (self->private_data.s_skip_frame[0].scratch > |
| ((uint64_t)(io2_a_src - iop_a_src))) { |
| self->private_data.s_skip_frame[0].scratch -= |
| ((uint64_t)(io2_a_src - iop_a_src)); |
| iop_a_src = io2_a_src; |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src += self->private_data.s_skip_frame[0].scratch; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_1 = *iop_a_src++; |
| v_lw = t_1; |
| } |
| if (v_lw > 8) { |
| status = wuffs_gif__error__bad_literal_width; |
| goto exit; |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| status = wuffs_gif__decoder__skip_blocks(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| if (self->private_impl.f_quirk_enabled_delay_num_decoded_frames) { |
| self->private_impl.f_delayed_num_decoded_frames = true; |
| } else { |
| wuffs_base__u64__sat_add_indirect( |
| &self->private_impl.f_num_decoded_frames_value, 1); |
| } |
| wuffs_gif__decoder__reset_gc(self); |
| |
| goto ok; |
| ok: |
| self->private_impl.p_skip_frame[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_skip_frame[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.decode_frame |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gif__decoder__decode_frame(wuffs_gif__decoder* self, |
| wuffs_base__pixel_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf, |
| wuffs_base__decode_frame_options* a_opts) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return (self->private_impl.magic == WUFFS_BASE__DISABLED) |
| ? wuffs_base__error__disabled_by_previous_error |
| : wuffs_base__error__initialize_not_called; |
| } |
| if (!a_dst || !a_src) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__bad_argument; |
| } |
| if ((self->private_impl.active_coroutine != 0) && |
| (self->private_impl.active_coroutine != 4)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__interleaved_coroutine_calls; |
| } |
| self->private_impl.active_coroutine = 0; |
| wuffs_base__status status = NULL; |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_frame[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| self->private_impl.f_ignore_metadata = true; |
| if (self->private_impl.f_call_sequence != 4) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| status = wuffs_gif__decoder__decode_frame_config(self, NULL, a_src); |
| if (status) { |
| goto suspend; |
| } |
| } |
| if (self->private_impl.f_quirk_enabled_reject_empty_frame && |
| ((self->private_impl.f_frame_rect_x0 == |
| self->private_impl.f_frame_rect_x1) || |
| (self->private_impl.f_frame_rect_y0 == |
| self->private_impl.f_frame_rect_y1))) { |
| status = wuffs_gif__error__bad_frame_size; |
| goto exit; |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| status = wuffs_gif__decoder__decode_id_part1(self, a_dst, a_src); |
| if (status) { |
| goto suspend; |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| status = wuffs_gif__decoder__decode_id_part2(self, a_dst, a_src, a_workbuf); |
| if (status) { |
| goto suspend; |
| } |
| wuffs_base__u64__sat_add_indirect( |
| &self->private_impl.f_num_decoded_frames_value, 1); |
| wuffs_gif__decoder__reset_gc(self); |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_frame[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_frame[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_impl.active_coroutine = |
| wuffs_base__status__is_suspension(status) ? 4 : 0; |
| |
| goto exit; |
| exit: |
| if (wuffs_base__status__is_error(status)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| } |
| return status; |
| } |
| |
| // -------- func gif.decoder.reset_gc |
| |
| static wuffs_base__empty_struct // |
| wuffs_gif__decoder__reset_gc(wuffs_gif__decoder* self) { |
| self->private_impl.f_call_sequence = 5; |
| self->private_impl.f_gc_has_transparent_index = false; |
| self->private_impl.f_gc_transparent_index = 0; |
| self->private_impl.f_gc_disposal = 0; |
| self->private_impl.f_gc_duration = 0; |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // -------- func gif.decoder.decode_up_to_id_part1 |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_up_to_id_part1(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_block_type = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_up_to_id_part1[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| if (!self->private_impl.f_restarted) { |
| if (self->private_impl.f_call_sequence != 2) { |
| self->private_impl.f_frame_config_io_position = |
| wuffs_base__u64__sat_add(a_src->meta.pos, |
| ((uint64_t)(iop_a_src - io0_a_src))); |
| } |
| } else if (self->private_impl.f_frame_config_io_position != |
| wuffs_base__u64__sat_add(a_src->meta.pos, |
| ((uint64_t)(iop_a_src - io0_a_src)))) { |
| status = wuffs_base__error__bad_restart; |
| goto exit; |
| } else { |
| self->private_impl.f_restarted = false; |
| } |
| while (true) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_0 = *iop_a_src++; |
| v_block_type = t_0; |
| } |
| if (v_block_type == 33) { |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| status = wuffs_gif__decoder__decode_extension(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| } else if (v_block_type == 44) { |
| if (self->private_impl.f_delayed_num_decoded_frames) { |
| self->private_impl.f_delayed_num_decoded_frames = false; |
| wuffs_base__u64__sat_add_indirect( |
| &self->private_impl.f_num_decoded_frames_value, 1); |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| status = wuffs_gif__decoder__decode_id_part0(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| goto label_0_break; |
| } else if (v_block_type == 59) { |
| if (self->private_impl.f_delayed_num_decoded_frames) { |
| self->private_impl.f_delayed_num_decoded_frames = false; |
| wuffs_base__u64__sat_add_indirect( |
| &self->private_impl.f_num_decoded_frames_value, 1); |
| } |
| self->private_impl.f_end_of_data = true; |
| goto label_0_break; |
| } else { |
| status = wuffs_gif__error__bad_block; |
| goto exit; |
| } |
| } |
| label_0_break:; |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_up_to_id_part1[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_up_to_id_part1[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.decode_header |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_header(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_c[6] = {0}; |
| uint32_t v_i = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_header[0]; |
| if (coro_susp_point) { |
| memcpy(v_c, self->private_data.s_decode_header[0].v_c, sizeof(v_c)); |
| v_i = self->private_data.s_decode_header[0].v_i; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| while (v_i < 6) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_0 = *iop_a_src++; |
| v_c[v_i] = t_0; |
| } |
| v_i += 1; |
| } |
| if ((v_c[0] != 71) || (v_c[1] != 73) || (v_c[2] != 70) || (v_c[3] != 56) || |
| ((v_c[4] != 55) && (v_c[4] != 57)) || (v_c[5] != 97)) { |
| status = wuffs_gif__error__bad_header; |
| goto exit; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_header[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_header[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| memcpy(self->private_data.s_decode_header[0].v_c, v_c, sizeof(v_c)); |
| self->private_data.s_decode_header[0].v_i = v_i; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.decode_lsd |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_lsd(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_flags = 0; |
| uint8_t v_background_color_index = 0; |
| uint32_t v_num_palette_entries = 0; |
| uint32_t v_i = 0; |
| uint32_t v_j = 0; |
| uint32_t v_argb = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_lsd[0]; |
| if (coro_susp_point) { |
| v_flags = self->private_data.s_decode_lsd[0].v_flags; |
| v_background_color_index = |
| self->private_data.s_decode_lsd[0].v_background_color_index; |
| v_num_palette_entries = |
| self->private_data.s_decode_lsd[0].v_num_palette_entries; |
| v_i = self->private_data.s_decode_lsd[0].v_i; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| uint32_t t_0; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_0 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src))); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_lsd[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_lsd[0].scratch; |
| uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0; |
| if (num_bits_0 == 8) { |
| t_0 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_0 += 8; |
| *scratch |= ((uint64_t)(num_bits_0)) << 56; |
| } |
| } |
| self->private_impl.f_width = t_0; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| uint32_t t_1; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_1 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src))); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_lsd[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_lsd[0].scratch; |
| uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1; |
| if (num_bits_1 == 8) { |
| t_1 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_1 += 8; |
| *scratch |= ((uint64_t)(num_bits_1)) << 56; |
| } |
| } |
| self->private_impl.f_height = t_1; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_2 = *iop_a_src++; |
| v_flags = t_2; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_3 = *iop_a_src++; |
| v_background_color_index = t_3; |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src++; |
| v_i = 0; |
| self->private_impl.f_has_global_palette = ((v_flags & 128) != 0); |
| if (self->private_impl.f_has_global_palette) { |
| v_num_palette_entries = (((uint32_t)(1)) << (1 + (v_flags & 7))); |
| while (v_i < v_num_palette_entries) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8); |
| uint32_t t_4; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) { |
| t_4 = ((uint32_t)(wuffs_base__load_u24be(iop_a_src))); |
| iop_a_src += 3; |
| } else { |
| self->private_data.s_decode_lsd[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_lsd[0].scratch; |
| uint32_t num_bits_4 = ((uint32_t)(*scratch & 0xFF)); |
| *scratch >>= 8; |
| *scratch <<= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_4); |
| if (num_bits_4 == 16) { |
| t_4 = ((uint32_t)(*scratch >> 40)); |
| break; |
| } |
| num_bits_4 += 8; |
| *scratch |= ((uint64_t)(num_bits_4)); |
| } |
| } |
| v_argb = t_4; |
| } |
| v_argb |= 4278190080; |
| self->private_data.f_palettes[0][((4 * v_i) + 0)] = |
| ((uint8_t)(((v_argb >> 0) & 255))); |
| self->private_data.f_palettes[0][((4 * v_i) + 1)] = |
| ((uint8_t)(((v_argb >> 8) & 255))); |
| self->private_data.f_palettes[0][((4 * v_i) + 2)] = |
| ((uint8_t)(((v_argb >> 16) & 255))); |
| self->private_data.f_palettes[0][((4 * v_i) + 3)] = |
| ((uint8_t)(((v_argb >> 24) & 255))); |
| v_i += 1; |
| } |
| if (self->private_impl.f_quirk_enabled_honor_background_color) { |
| if ((v_background_color_index != 0) && |
| (((uint32_t)(v_background_color_index)) < v_num_palette_entries)) { |
| v_j = (4 * ((uint32_t)(v_background_color_index))); |
| self->private_impl.f_background_color_u32_argb_premul = |
| ((((uint32_t)(self->private_data.f_palettes[0][(v_j + 0)])) |
| << 0) | |
| (((uint32_t)(self->private_data.f_palettes[0][(v_j + 1)])) |
| << 8) | |
| (((uint32_t)(self->private_data.f_palettes[0][(v_j + 2)])) |
| << 16) | |
| (((uint32_t)(self->private_data.f_palettes[0][(v_j + 3)])) |
| << 24)); |
| } else { |
| self->private_impl.f_background_color_u32_argb_premul = 77; |
| } |
| } |
| } |
| while (v_i < 256) { |
| self->private_data.f_palettes[0][((4 * v_i) + 0)] = 0; |
| self->private_data.f_palettes[0][((4 * v_i) + 1)] = 0; |
| self->private_data.f_palettes[0][((4 * v_i) + 2)] = 0; |
| self->private_data.f_palettes[0][((4 * v_i) + 3)] = 255; |
| v_i += 1; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_lsd[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_lsd[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_data.s_decode_lsd[0].v_flags = v_flags; |
| self->private_data.s_decode_lsd[0].v_background_color_index = |
| v_background_color_index; |
| self->private_data.s_decode_lsd[0].v_num_palette_entries = |
| v_num_palette_entries; |
| self->private_data.s_decode_lsd[0].v_i = v_i; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.decode_extension |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_extension(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_label = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_extension[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_0 = *iop_a_src++; |
| v_label = t_0; |
| } |
| if (v_label == 249) { |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| status = wuffs_gif__decoder__decode_gc(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| status = NULL; |
| goto ok; |
| } else if (v_label == 255) { |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| status = wuffs_gif__decoder__decode_ae(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| status = NULL; |
| goto ok; |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| status = wuffs_gif__decoder__skip_blocks(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_extension[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_extension[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.skip_blocks |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__skip_blocks(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_block_size = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_skip_blocks[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| while (true) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_0 = *iop_a_src++; |
| v_block_size = t_0; |
| } |
| if (v_block_size == 0) { |
| status = NULL; |
| goto ok; |
| } |
| self->private_data.s_skip_blocks[0].scratch = ((uint32_t)(v_block_size)); |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| if (self->private_data.s_skip_blocks[0].scratch > |
| ((uint64_t)(io2_a_src - iop_a_src))) { |
| self->private_data.s_skip_blocks[0].scratch -= |
| ((uint64_t)(io2_a_src - iop_a_src)); |
| iop_a_src = io2_a_src; |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src += self->private_data.s_skip_blocks[0].scratch; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_skip_blocks[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_skip_blocks[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.decode_ae |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_ae(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_c = 0; |
| uint8_t v_block_size = 0; |
| bool v_is_animexts = false; |
| bool v_is_netscape = false; |
| bool v_is_iccp = false; |
| bool v_is_xmp = false; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_ae[0]; |
| if (coro_susp_point) { |
| v_block_size = self->private_data.s_decode_ae[0].v_block_size; |
| v_is_animexts = self->private_data.s_decode_ae[0].v_is_animexts; |
| v_is_netscape = self->private_data.s_decode_ae[0].v_is_netscape; |
| v_is_iccp = self->private_data.s_decode_ae[0].v_is_iccp; |
| v_is_xmp = self->private_data.s_decode_ae[0].v_is_xmp; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| while (true) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_0 = *iop_a_src++; |
| v_block_size = t_0; |
| } |
| if (v_block_size == 0) { |
| status = NULL; |
| goto ok; |
| } |
| if (v_block_size != 11) { |
| self->private_data.s_decode_ae[0].scratch = ((uint32_t)(v_block_size)); |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| if (self->private_data.s_decode_ae[0].scratch > |
| ((uint64_t)(io2_a_src - iop_a_src))) { |
| self->private_data.s_decode_ae[0].scratch -= |
| ((uint64_t)(io2_a_src - iop_a_src)); |
| iop_a_src = io2_a_src; |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src += self->private_data.s_decode_ae[0].scratch; |
| goto label_0_break; |
| } |
| v_is_animexts = true; |
| v_is_netscape = true; |
| v_is_iccp = true; |
| v_is_xmp = true; |
| v_block_size = 0; |
| while (v_block_size < 11) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_1 = *iop_a_src++; |
| v_c = t_1; |
| } |
| v_is_animexts = |
| (v_is_animexts && (v_c == wuffs_gif__animexts1dot0[v_block_size])); |
| v_is_netscape = |
| (v_is_netscape && (v_c == wuffs_gif__netscape2dot0[v_block_size])); |
| v_is_iccp = |
| (v_is_iccp && (v_c == wuffs_gif__iccrgbg1012[v_block_size])); |
| v_is_xmp = (v_is_xmp && (v_c == wuffs_gif__xmpdataxmp[v_block_size])); |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wconversion" |
| #endif |
| v_block_size += 1; |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| } |
| if (v_is_animexts || v_is_netscape) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_2 = *iop_a_src++; |
| v_block_size = t_2; |
| } |
| if (v_block_size != 3) { |
| self->private_data.s_decode_ae[0].scratch = |
| ((uint32_t)(v_block_size)); |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5); |
| if (self->private_data.s_decode_ae[0].scratch > |
| ((uint64_t)(io2_a_src - iop_a_src))) { |
| self->private_data.s_decode_ae[0].scratch -= |
| ((uint64_t)(io2_a_src - iop_a_src)); |
| iop_a_src = io2_a_src; |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src += self->private_data.s_decode_ae[0].scratch; |
| goto label_0_break; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_3 = *iop_a_src++; |
| v_c = t_3; |
| } |
| if (v_c != 1) { |
| self->private_data.s_decode_ae[0].scratch = 2; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); |
| if (self->private_data.s_decode_ae[0].scratch > |
| ((uint64_t)(io2_a_src - iop_a_src))) { |
| self->private_data.s_decode_ae[0].scratch -= |
| ((uint64_t)(io2_a_src - iop_a_src)); |
| iop_a_src = io2_a_src; |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src += self->private_data.s_decode_ae[0].scratch; |
| goto label_0_break; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8); |
| uint32_t t_4; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_4 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src))); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_ae[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_ae[0].scratch; |
| uint32_t num_bits_4 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4; |
| if (num_bits_4 == 8) { |
| t_4 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_4 += 8; |
| *scratch |= ((uint64_t)(num_bits_4)) << 56; |
| } |
| } |
| self->private_impl.f_num_loops = t_4; |
| } |
| self->private_impl.f_seen_num_loops = true; |
| if ((0 < self->private_impl.f_num_loops) && |
| (self->private_impl.f_num_loops <= 65535)) { |
| self->private_impl.f_num_loops += 1; |
| } |
| } else if (self->private_impl.f_ignore_metadata) { |
| } else if (v_is_iccp && self->private_impl.f_report_metadata_iccp) { |
| while (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { |
| status = wuffs_base__suspension__short_read; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(10); |
| } |
| self->private_impl.f_metadata_chunk_length_value = |
| ((uint64_t)(wuffs_base__load_u8be(iop_a_src))); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| self->private_impl.f_metadata_fourcc_value = 1229144912; |
| self->private_impl.f_metadata_io_position = wuffs_base__u64__sat_add( |
| wuffs_base__u64__sat_add(a_src->meta.pos, |
| ((uint64_t)(iop_a_src - io0_a_src))), |
| self->private_impl.f_metadata_chunk_length_value); |
| self->private_impl.f_call_sequence = 1; |
| status = wuffs_base__warning__metadata_reported; |
| goto ok; |
| } else if (v_is_xmp && self->private_impl.f_report_metadata_xmp) { |
| while (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { |
| status = wuffs_base__suspension__short_read; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(11); |
| } |
| self->private_impl.f_metadata_chunk_length_value = |
| ((uint64_t)(wuffs_base__load_u8be(iop_a_src))); |
| if (self->private_impl.f_metadata_chunk_length_value > 0) { |
| self->private_impl.f_metadata_chunk_length_value += 1; |
| } else { |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| } |
| self->private_impl.f_metadata_fourcc_value = 1481461792; |
| self->private_impl.f_metadata_io_position = wuffs_base__u64__sat_add( |
| wuffs_base__u64__sat_add(a_src->meta.pos, |
| ((uint64_t)(iop_a_src - io0_a_src))), |
| self->private_impl.f_metadata_chunk_length_value); |
| self->private_impl.f_call_sequence = 1; |
| status = wuffs_base__warning__metadata_reported; |
| goto ok; |
| } |
| goto label_0_break; |
| } |
| label_0_break:; |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(12); |
| status = wuffs_gif__decoder__skip_blocks(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_ae[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_ae[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_data.s_decode_ae[0].v_block_size = v_block_size; |
| self->private_data.s_decode_ae[0].v_is_animexts = v_is_animexts; |
| self->private_data.s_decode_ae[0].v_is_netscape = v_is_netscape; |
| self->private_data.s_decode_ae[0].v_is_iccp = v_is_iccp; |
| self->private_data.s_decode_ae[0].v_is_xmp = v_is_xmp; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.decode_gc |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_gc(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_c = 0; |
| uint8_t v_flags = 0; |
| uint16_t v_gc_duration_centiseconds = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_gc[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_0 = *iop_a_src++; |
| v_c = t_0; |
| } |
| if (v_c != 4) { |
| status = wuffs_gif__error__bad_graphic_control; |
| goto exit; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_1 = *iop_a_src++; |
| v_flags = t_1; |
| } |
| self->private_impl.f_gc_has_transparent_index = ((v_flags & 1) != 0); |
| v_flags = ((v_flags >> 2) & 7); |
| if (v_flags == 2) { |
| self->private_impl.f_gc_disposal = 1; |
| } else if ((v_flags == 3) || (v_flags == 4)) { |
| self->private_impl.f_gc_disposal = 2; |
| } else { |
| self->private_impl.f_gc_disposal = 0; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| uint16_t t_2; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_2 = wuffs_base__load_u16le(iop_a_src); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_gc[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_gc[0].scratch; |
| uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2; |
| if (num_bits_2 == 8) { |
| t_2 = ((uint16_t)(*scratch)); |
| break; |
| } |
| num_bits_2 += 8; |
| *scratch |= ((uint64_t)(num_bits_2)) << 56; |
| } |
| } |
| v_gc_duration_centiseconds = t_2; |
| } |
| self->private_impl.f_gc_duration = |
| (((uint64_t)(v_gc_duration_centiseconds)) * 7056000); |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_3 = *iop_a_src++; |
| self->private_impl.f_gc_transparent_index = t_3; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_4 = *iop_a_src++; |
| v_c = t_4; |
| } |
| if (v_c != 0) { |
| status = wuffs_gif__error__bad_graphic_control; |
| goto exit; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_gc[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_gc[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.decode_id_part0 |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_id_part0(wuffs_gif__decoder* self, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_id_part0[0]; |
| if (coro_susp_point) { |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| uint32_t t_0; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_0 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src))); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_id_part0[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_id_part0[0].scratch; |
| uint32_t num_bits_0 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_0; |
| if (num_bits_0 == 8) { |
| t_0 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_0 += 8; |
| *scratch |= ((uint64_t)(num_bits_0)) << 56; |
| } |
| } |
| self->private_impl.f_frame_rect_x0 = t_0; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| uint32_t t_1; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_1 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src))); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_id_part0[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_id_part0[0].scratch; |
| uint32_t num_bits_1 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_1; |
| if (num_bits_1 == 8) { |
| t_1 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_1 += 8; |
| *scratch |= ((uint64_t)(num_bits_1)) << 56; |
| } |
| } |
| self->private_impl.f_frame_rect_y0 = t_1; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5); |
| uint32_t t_2; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_2 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src))); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_id_part0[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_id_part0[0].scratch; |
| uint32_t num_bits_2 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_2; |
| if (num_bits_2 == 8) { |
| t_2 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_2 += 8; |
| *scratch |= ((uint64_t)(num_bits_2)) << 56; |
| } |
| } |
| self->private_impl.f_frame_rect_x1 = t_2; |
| } |
| self->private_impl.f_frame_rect_x1 += self->private_impl.f_frame_rect_x0; |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); |
| uint32_t t_3; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_3 = ((uint32_t)(wuffs_base__load_u16le(iop_a_src))); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_id_part0[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_id_part0[0].scratch; |
| uint32_t num_bits_3 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_3; |
| if (num_bits_3 == 8) { |
| t_3 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_3 += 8; |
| *scratch |= ((uint64_t)(num_bits_3)) << 56; |
| } |
| } |
| self->private_impl.f_frame_rect_y1 = t_3; |
| } |
| self->private_impl.f_frame_rect_y1 += self->private_impl.f_frame_rect_y0; |
| self->private_impl.f_dst_x = self->private_impl.f_frame_rect_x0; |
| self->private_impl.f_dst_y = self->private_impl.f_frame_rect_y0; |
| if ((self->private_impl.f_call_sequence == 0) && |
| !self->private_impl.f_quirk_enabled_image_bounds_are_strict) { |
| self->private_impl.f_width = wuffs_base__u32__max( |
| self->private_impl.f_width, self->private_impl.f_frame_rect_x1); |
| self->private_impl.f_height = wuffs_base__u32__max( |
| self->private_impl.f_height, self->private_impl.f_frame_rect_y1); |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_id_part0[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_id_part0[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.decode_id_part1 |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_id_part1(wuffs_gif__decoder* self, |
| wuffs_base__pixel_buffer* a_dst, |
| wuffs_base__io_buffer* a_src) { |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_flags = 0; |
| uint8_t v_which_palette = 0; |
| uint32_t v_num_palette_entries = 0; |
| uint32_t v_i = 0; |
| uint32_t v_argb = 0; |
| wuffs_base__slice_u8 v_dst_palette = {0}; |
| wuffs_base__status v_status = NULL; |
| uint8_t v_lw = 0; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_id_part1[0]; |
| if (coro_susp_point) { |
| v_which_palette = self->private_data.s_decode_id_part1[0].v_which_palette; |
| v_num_palette_entries = |
| self->private_data.s_decode_id_part1[0].v_num_palette_entries; |
| v_i = self->private_data.s_decode_id_part1[0].v_i; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_0 = *iop_a_src++; |
| v_flags = t_0; |
| } |
| if ((v_flags & 64) != 0) { |
| self->private_impl.f_interlace = 4; |
| } else { |
| self->private_impl.f_interlace = 0; |
| } |
| v_which_palette = 1; |
| if ((v_flags & 128) != 0) { |
| v_num_palette_entries = (((uint32_t)(1)) << (1 + (v_flags & 7))); |
| v_i = 0; |
| while (v_i < v_num_palette_entries) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| uint32_t t_1; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 3)) { |
| t_1 = ((uint32_t)(wuffs_base__load_u24be(iop_a_src))); |
| iop_a_src += 3; |
| } else { |
| self->private_data.s_decode_id_part1[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = |
| &self->private_data.s_decode_id_part1[0].scratch; |
| uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFF)); |
| *scratch >>= 8; |
| *scratch <<= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1); |
| if (num_bits_1 == 16) { |
| t_1 = ((uint32_t)(*scratch >> 40)); |
| break; |
| } |
| num_bits_1 += 8; |
| *scratch |= ((uint64_t)(num_bits_1)); |
| } |
| } |
| v_argb = t_1; |
| } |
| v_argb |= 4278190080; |
| self->private_data.f_palettes[1][((4 * v_i) + 0)] = |
| ((uint8_t)(((v_argb >> 0) & 255))); |
| self->private_data.f_palettes[1][((4 * v_i) + 1)] = |
| ((uint8_t)(((v_argb >> 8) & 255))); |
| self->private_data.f_palettes[1][((4 * v_i) + 2)] = |
| ((uint8_t)(((v_argb >> 16) & 255))); |
| self->private_data.f_palettes[1][((4 * v_i) + 3)] = |
| ((uint8_t)(((v_argb >> 24) & 255))); |
| v_i += 1; |
| } |
| while (v_i < 256) { |
| self->private_data.f_palettes[1][((4 * v_i) + 0)] = 0; |
| self->private_data.f_palettes[1][((4 * v_i) + 1)] = 0; |
| self->private_data.f_palettes[1][((4 * v_i) + 2)] = 0; |
| self->private_data.f_palettes[1][((4 * v_i) + 3)] = 255; |
| v_i += 1; |
| } |
| } else if (self->private_impl.f_quirk_enabled_reject_empty_palette && |
| !self->private_impl.f_has_global_palette) { |
| status = wuffs_gif__error__bad_palette; |
| goto exit; |
| } else if (self->private_impl.f_gc_has_transparent_index) { |
| wuffs_base__slice_u8__copy_from_slice( |
| wuffs_base__make_slice_u8(self->private_data.f_palettes[1], 1024), |
| wuffs_base__make_slice_u8(self->private_data.f_palettes[0], 1024)); |
| } else { |
| v_which_palette = 0; |
| } |
| if (self->private_impl.f_gc_has_transparent_index) { |
| self->private_data.f_palettes[1][( |
| (4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 0)] = |
| 0; |
| self->private_data.f_palettes[1][( |
| (4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 1)] = |
| 0; |
| self->private_data.f_palettes[1][( |
| (4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 2)] = |
| 0; |
| self->private_data.f_palettes[1][( |
| (4 * ((uint32_t)(self->private_impl.f_gc_transparent_index))) + 3)] = |
| 0; |
| } |
| v_dst_palette = wuffs_base__pixel_buffer__palette(a_dst); |
| if (((uint64_t)(v_dst_palette.len)) == 0) { |
| v_dst_palette = |
| wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024); |
| } |
| v_status = wuffs_base__pixel_swizzler__prepare( |
| &self->private_impl.f_swizzler, |
| wuffs_base__pixel_buffer__pixel_format(a_dst), v_dst_palette, |
| 1191444488, |
| wuffs_base__make_slice_u8( |
| self->private_data.f_palettes[v_which_palette], 1024)); |
| if (!wuffs_base__status__is_ok(v_status)) { |
| status = v_status; |
| if (wuffs_base__status__is_error(status)) { |
| goto exit; |
| } else if (wuffs_base__status__is_suspension(status)) { |
| status = wuffs_base__error__cannot_return_a_suspension; |
| goto exit; |
| } |
| goto ok; |
| } |
| if (self->private_impl.f_previous_lzw_decode_ended_abruptly) { |
| wuffs_base__ignore_status(wuffs_lzw__decoder__initialize( |
| &self->private_data.f_lzw, sizeof(wuffs_lzw__decoder), WUFFS_VERSION, |
| 0)); |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_2 = *iop_a_src++; |
| v_lw = t_2; |
| } |
| if (v_lw > 8) { |
| status = wuffs_gif__error__bad_literal_width; |
| goto exit; |
| } |
| wuffs_lzw__decoder__set_literal_width(&self->private_data.f_lzw, |
| ((uint32_t)(v_lw))); |
| self->private_impl.f_previous_lzw_decode_ended_abruptly = true; |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_id_part1[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_id_part1[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_data.s_decode_id_part1[0].v_which_palette = v_which_palette; |
| self->private_data.s_decode_id_part1[0].v_num_palette_entries = |
| v_num_palette_entries; |
| self->private_data.s_decode_id_part1[0].v_i = v_i; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.decode_id_part2 |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__decode_id_part2(wuffs_gif__decoder* self, |
| wuffs_base__pixel_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf) { |
| wuffs_base__status status = NULL; |
| |
| uint64_t v_block_size = 0; |
| bool v_need_block_size = false; |
| uint64_t v_n_compressed = 0; |
| wuffs_base__slice_u8 v_compressed = {0}; |
| wuffs_base__io_buffer u_r = wuffs_base__empty_io_buffer(); |
| wuffs_base__io_buffer* v_r = &u_r; |
| uint8_t* iop_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io0_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_v_r WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint64_t v_mark = 0; |
| wuffs_base__status v_lzw_status = NULL; |
| wuffs_base__status v_copy_status = NULL; |
| wuffs_base__slice_u8 v_uncompressed = {0}; |
| |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| wuffs_base__io_buffer empty_io_buffer = wuffs_base__empty_io_buffer(); |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_id_part2[0]; |
| if (coro_susp_point) { |
| v_block_size = self->private_data.s_decode_id_part2[0].v_block_size; |
| v_need_block_size = |
| self->private_data.s_decode_id_part2[0].v_need_block_size; |
| v_lzw_status = self->private_data.s_decode_id_part2[0].v_lzw_status; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| v_need_block_size = true; |
| label_0_continue:; |
| while (true) { |
| if (v_need_block_size) { |
| v_need_block_size = false; |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t t_0 = *iop_a_src++; |
| v_block_size = t_0; |
| } |
| } |
| if (v_block_size == 0) { |
| goto label_0_break; |
| } |
| while (((uint64_t)(io2_a_src - iop_a_src)) == 0) { |
| status = wuffs_base__suspension__short_read; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(2); |
| } |
| if (self->private_impl.f_compressed_ri == |
| self->private_impl.f_compressed_wi) { |
| self->private_impl.f_compressed_ri = 0; |
| self->private_impl.f_compressed_wi = 0; |
| } |
| while (self->private_impl.f_compressed_wi <= 3841) { |
| v_n_compressed = wuffs_base__u64__min( |
| v_block_size, ((uint64_t)(io2_a_src - iop_a_src))); |
| if (v_n_compressed <= 0) { |
| goto label_1_break; |
| } |
| v_compressed = |
| wuffs_base__io_reader__take(&iop_a_src, io2_a_src, v_n_compressed); |
| wuffs_base__slice_u8__copy_from_slice( |
| wuffs_base__slice_u8__subslice_i( |
| wuffs_base__make_slice_u8(self->private_data.f_compressed, |
| 4096), |
| self->private_impl.f_compressed_wi), |
| v_compressed); |
| wuffs_base__u64__sat_add_indirect(&self->private_impl.f_compressed_wi, |
| v_n_compressed); |
| wuffs_base__u64__sat_sub_indirect(&v_block_size, v_n_compressed); |
| if (v_block_size > 0) { |
| goto label_1_break; |
| } |
| if (((uint64_t)(io2_a_src - iop_a_src)) <= 0) { |
| v_need_block_size = true; |
| goto label_1_break; |
| } |
| v_block_size = ((uint64_t)(wuffs_base__load_u8be(iop_a_src))); |
| (iop_a_src += 1, wuffs_base__make_empty_struct()); |
| } |
| label_1_break:; |
| if (1 > ((uint64_t)(a_workbuf.len))) { |
| status = wuffs_base__error__bad_workbuf_length; |
| goto exit; |
| } |
| label_2_continue:; |
| while (true) { |
| if ((self->private_impl.f_compressed_ri > |
| self->private_impl.f_compressed_wi) || |
| (self->private_impl.f_compressed_wi > 4096)) { |
| status = wuffs_gif__error__internal_error_inconsistent_ri_wi; |
| goto exit; |
| } |
| { |
| wuffs_base__io_buffer* o_0_v_r = v_r; |
| uint8_t* o_0_iop_v_r = iop_v_r; |
| uint8_t* o_0_io0_v_r = io0_v_r; |
| uint8_t* o_0_io1_v_r = io1_v_r; |
| uint8_t* o_0_io2_v_r = io2_v_r; |
| v_r = wuffs_base__io_reader__set( |
| &u_r, &iop_v_r, &io0_v_r, &io1_v_r, &io2_v_r, |
| wuffs_base__slice_u8__subslice_ij( |
| wuffs_base__make_slice_u8(self->private_data.f_compressed, |
| 4096), |
| self->private_impl.f_compressed_ri, |
| self->private_impl.f_compressed_wi)); |
| v_mark = ((uint64_t)(iop_v_r - io0_v_r)); |
| { |
| u_r.meta.ri = ((size_t)(iop_v_r - u_r.data.ptr)); |
| wuffs_base__status t_1 = wuffs_lzw__decoder__decode_io_writer( |
| &self->private_data.f_lzw, &empty_io_buffer, v_r, |
| wuffs_base__utility__empty_slice_u8()); |
| iop_v_r = u_r.data.ptr + u_r.meta.ri; |
| v_lzw_status = t_1; |
| } |
| wuffs_base__u64__sat_add_indirect( |
| &self->private_impl.f_compressed_ri, |
| wuffs_base__io__count_since(v_mark, |
| ((uint64_t)(iop_v_r - io0_v_r)))); |
| v_r = o_0_v_r; |
| iop_v_r = o_0_iop_v_r; |
| io0_v_r = o_0_io0_v_r; |
| io1_v_r = o_0_io1_v_r; |
| io2_v_r = o_0_io2_v_r; |
| } |
| v_uncompressed = wuffs_lzw__decoder__flush(&self->private_data.f_lzw); |
| if (((uint64_t)(v_uncompressed.len)) > 0) { |
| v_copy_status = wuffs_gif__decoder__copy_to_image_buffer( |
| self, a_dst, v_uncompressed); |
| if (wuffs_base__status__is_error(v_copy_status)) { |
| status = v_copy_status; |
| goto exit; |
| } |
| } |
| if (wuffs_base__status__is_ok(v_lzw_status)) { |
| self->private_impl.f_previous_lzw_decode_ended_abruptly = false; |
| if (v_need_block_size || (v_block_size > 0)) { |
| self->private_data.s_decode_id_part2[0].scratch = |
| ((uint32_t)(v_block_size)); |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| if (self->private_data.s_decode_id_part2[0].scratch > |
| ((uint64_t)(io2_a_src - iop_a_src))) { |
| self->private_data.s_decode_id_part2[0].scratch -= |
| ((uint64_t)(io2_a_src - iop_a_src)); |
| iop_a_src = io2_a_src; |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src += self->private_data.s_decode_id_part2[0].scratch; |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| status = wuffs_gif__decoder__skip_blocks(self, a_src); |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| if (status) { |
| goto suspend; |
| } |
| } |
| goto label_0_break; |
| } else if (v_lzw_status == wuffs_base__suspension__short_read) { |
| goto label_0_continue; |
| } else if (v_lzw_status == wuffs_base__suspension__short_write) { |
| goto label_2_continue; |
| } |
| status = v_lzw_status; |
| if (wuffs_base__status__is_error(status)) { |
| goto exit; |
| } else if (wuffs_base__status__is_suspension(status)) { |
| status = wuffs_base__error__cannot_return_a_suspension; |
| goto exit; |
| } |
| goto ok; |
| } |
| } |
| label_0_break:; |
| self->private_impl.f_compressed_ri = 0; |
| self->private_impl.f_compressed_wi = 0; |
| if ((self->private_impl.f_dst_y < self->private_impl.f_frame_rect_y1) && |
| (self->private_impl.f_frame_rect_x0 != |
| self->private_impl.f_frame_rect_x1) && |
| (self->private_impl.f_frame_rect_y0 != |
| self->private_impl.f_frame_rect_y1)) { |
| status = wuffs_base__error__not_enough_data; |
| goto exit; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_id_part2[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_id_part2[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_data.s_decode_id_part2[0].v_block_size = v_block_size; |
| self->private_data.s_decode_id_part2[0].v_need_block_size = v_need_block_size; |
| self->private_data.s_decode_id_part2[0].v_lzw_status = v_lzw_status; |
| |
| goto exit; |
| exit: |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| return status; |
| } |
| |
| // -------- func gif.decoder.copy_to_image_buffer |
| |
| static wuffs_base__status // |
| wuffs_gif__decoder__copy_to_image_buffer(wuffs_gif__decoder* self, |
| wuffs_base__pixel_buffer* a_pb, |
| wuffs_base__slice_u8 a_src) { |
| wuffs_base__slice_u8 v_dst = {0}; |
| wuffs_base__slice_u8 v_src = {0}; |
| uint64_t v_width_in_bytes = 0; |
| uint64_t v_n = 0; |
| uint64_t v_src_ri = 0; |
| uint32_t v_bytes_per_pixel = 0; |
| uint32_t v_pixfmt_channels = 0; |
| wuffs_base__table_u8 v_tab = {0}; |
| uint64_t v_i = 0; |
| uint64_t v_j = 0; |
| uint32_t v_replicate_y0 = 0; |
| uint32_t v_replicate_y1 = 0; |
| wuffs_base__slice_u8 v_replicate_dst = {0}; |
| wuffs_base__slice_u8 v_replicate_src = {0}; |
| |
| v_pixfmt_channels = (wuffs_base__pixel_buffer__pixel_format(a_pb) & 65535); |
| if (v_pixfmt_channels == 34952) { |
| v_bytes_per_pixel = 4; |
| } else if (v_pixfmt_channels == 2184) { |
| v_bytes_per_pixel = 3; |
| } else if (v_pixfmt_channels == 8) { |
| v_bytes_per_pixel = 1; |
| } else { |
| return wuffs_base__error__unsupported_option; |
| } |
| v_width_in_bytes = (((uint64_t)(self->private_impl.f_width)) * |
| ((uint64_t)(v_bytes_per_pixel))); |
| v_tab = wuffs_base__pixel_buffer__plane(a_pb, 0); |
| label_0_continue:; |
| while (v_src_ri < ((uint64_t)(a_src.len))) { |
| v_src = wuffs_base__slice_u8__subslice_i(a_src, v_src_ri); |
| if (self->private_impl.f_dst_y >= self->private_impl.f_frame_rect_y1) { |
| if (self->private_impl.f_quirk_enabled_ignore_too_much_pixel_data) { |
| return NULL; |
| } |
| return wuffs_base__error__too_much_data; |
| } |
| v_dst = wuffs_base__table_u8__row(v_tab, self->private_impl.f_dst_y); |
| if (self->private_impl.f_dst_y >= self->private_impl.f_height) { |
| v_dst = wuffs_base__slice_u8__subslice_j(v_dst, 0); |
| } else if (v_width_in_bytes < ((uint64_t)(v_dst.len))) { |
| v_dst = wuffs_base__slice_u8__subslice_j(v_dst, v_width_in_bytes); |
| } |
| v_i = (((uint64_t)(self->private_impl.f_dst_x)) * |
| ((uint64_t)(v_bytes_per_pixel))); |
| if (v_i < ((uint64_t)(v_dst.len))) { |
| v_j = (((uint64_t)(self->private_impl.f_frame_rect_x1)) * |
| ((uint64_t)(v_bytes_per_pixel))); |
| if ((v_i <= v_j) && (v_j <= ((uint64_t)(v_dst.len)))) { |
| v_dst = wuffs_base__slice_u8__subslice_ij(v_dst, v_i, v_j); |
| } else { |
| v_dst = wuffs_base__slice_u8__subslice_i(v_dst, v_i); |
| } |
| v_n = wuffs_base__pixel_swizzler__swizzle_interleaved( |
| &self->private_impl.f_swizzler, v_dst, |
| wuffs_base__make_slice_u8(self->private_data.f_dst_palette, 1024), |
| v_src); |
| wuffs_base__u64__sat_add_indirect(&v_src_ri, v_n); |
| wuffs_base__u32__sat_add_indirect(&self->private_impl.f_dst_x, |
| ((uint32_t)((v_n & 4294967295)))); |
| self->private_impl.f_dirty_max_excl_y = wuffs_base__u32__max( |
| self->private_impl.f_dirty_max_excl_y, |
| wuffs_base__u32__sat_add(self->private_impl.f_dst_y, 1)); |
| } |
| if (self->private_impl.f_frame_rect_x1 <= self->private_impl.f_dst_x) { |
| self->private_impl.f_dst_x = self->private_impl.f_frame_rect_x0; |
| if (self->private_impl.f_interlace == 0) { |
| wuffs_base__u32__sat_add_indirect(&self->private_impl.f_dst_y, 1); |
| goto label_0_continue; |
| } |
| if ((self->private_impl.f_num_decoded_frames_value == 0) && |
| !self->private_impl.f_gc_has_transparent_index && |
| (self->private_impl.f_interlace > 1)) { |
| v_replicate_src = |
| wuffs_base__table_u8__row(v_tab, self->private_impl.f_dst_y); |
| v_replicate_y0 = |
| wuffs_base__u32__sat_add(self->private_impl.f_dst_y, 1); |
| v_replicate_y1 = wuffs_base__u32__sat_add( |
| self->private_impl.f_dst_y, |
| ((uint32_t)( |
| wuffs_gif__interlace_count[self->private_impl.f_interlace]))); |
| v_replicate_y1 = wuffs_base__u32__min( |
| v_replicate_y1, self->private_impl.f_frame_rect_y1); |
| while (v_replicate_y0 < v_replicate_y1) { |
| v_replicate_dst = wuffs_base__table_u8__row(v_tab, v_replicate_y0); |
| wuffs_base__slice_u8__copy_from_slice(v_replicate_dst, |
| v_replicate_src); |
| v_replicate_y0 += 1; |
| } |
| self->private_impl.f_dirty_max_excl_y = wuffs_base__u32__max( |
| self->private_impl.f_dirty_max_excl_y, v_replicate_y1); |
| } |
| wuffs_base__u32__sat_add_indirect( |
| &self->private_impl.f_dst_y, |
| ((uint32_t)( |
| wuffs_gif__interlace_delta[self->private_impl.f_interlace]))); |
| while ( |
| (self->private_impl.f_interlace > 0) && |
| (self->private_impl.f_dst_y >= self->private_impl.f_frame_rect_y1)) { |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wconversion" |
| #endif |
| self->private_impl.f_interlace -= 1; |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| self->private_impl.f_dst_y = wuffs_base__u32__sat_add( |
| self->private_impl.f_frame_rect_y0, |
| wuffs_gif__interlace_start[self->private_impl.f_interlace]); |
| } |
| goto label_0_continue; |
| } |
| if (((uint64_t)(a_src.len)) == v_src_ri) { |
| goto label_0_break; |
| } else if (((uint64_t)(a_src.len)) < v_src_ri) { |
| return wuffs_gif__error__internal_error_inconsistent_ri_wi; |
| } |
| v_n = ((uint64_t)( |
| (self->private_impl.f_frame_rect_x1 - self->private_impl.f_dst_x))); |
| v_n = wuffs_base__u64__min(v_n, (((uint64_t)(a_src.len)) - v_src_ri)); |
| wuffs_base__u64__sat_add_indirect(&v_src_ri, v_n); |
| wuffs_base__u32__sat_add_indirect(&self->private_impl.f_dst_x, |
| ((uint32_t)((v_n & 4294967295)))); |
| if (self->private_impl.f_frame_rect_x1 <= self->private_impl.f_dst_x) { |
| self->private_impl.f_dst_x = self->private_impl.f_frame_rect_x0; |
| wuffs_base__u32__sat_add_indirect( |
| &self->private_impl.f_dst_y, |
| ((uint32_t)( |
| wuffs_gif__interlace_delta[self->private_impl.f_interlace]))); |
| while ( |
| (self->private_impl.f_interlace > 0) && |
| (self->private_impl.f_dst_y >= self->private_impl.f_frame_rect_y1)) { |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wconversion" |
| #endif |
| self->private_impl.f_interlace -= 1; |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| self->private_impl.f_dst_y = wuffs_base__u32__sat_add( |
| self->private_impl.f_frame_rect_y0, |
| wuffs_gif__interlace_start[self->private_impl.f_interlace]); |
| } |
| goto label_0_continue; |
| } |
| if (v_src_ri != ((uint64_t)(a_src.len))) { |
| return wuffs_gif__error__internal_error_inconsistent_ri_wi; |
| } |
| goto label_0_break; |
| } |
| label_0_break:; |
| return NULL; |
| } |
| |
| #endif // !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GIF) |
| |
| #if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__GZIP) |
| |
| // ---------------- Status Codes Implementations |
| |
| const char* wuffs_gzip__error__bad_checksum = "#gzip: bad checksum"; |
| const char* wuffs_gzip__error__bad_compression_method = |
| "#gzip: bad compression method"; |
| const char* wuffs_gzip__error__bad_encoding_flags = "#gzip: bad encoding flags"; |
| const char* wuffs_gzip__error__bad_header = "#gzip: bad header"; |
| |
| // ---------------- Private Consts |
| |
| // ---------------- Private Initializer Prototypes |
| |
| // ---------------- Private Function Prototypes |
| |
| // ---------------- Initializer Implementations |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_gzip__decoder__initialize(wuffs_gzip__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (sizeof(*self) != sizeof_star_self) { |
| return wuffs_base__error__bad_sizeof_receiver; |
| } |
| if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || |
| (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { |
| return wuffs_base__error__bad_wuffs_version; |
| } |
| |
| if ((initialize_flags & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) { |
| // The whole point of this if-check is to detect an uninitialized *self. |
| // We disable the warning on GCC. Clang-5.0 does not have this warning. |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wmaybe-uninitialized" |
| #endif |
| if (self->private_impl.magic != 0) { |
| return wuffs_base__error__initialize_falsely_claimed_already_zeroed; |
| } |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| } else { |
| if ((initialize_flags & |
| WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { |
| memset(self, 0, sizeof(*self)); |
| initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; |
| } else { |
| memset(&(self->private_impl), 0, sizeof(self->private_impl)); |
| } |
| } |
| |
| { |
| wuffs_base__status z = wuffs_crc32__ieee_hasher__initialize( |
| &self->private_data.f_checksum, sizeof(self->private_data.f_checksum), |
| WUFFS_VERSION, initialize_flags); |
| if (z) { |
| return z; |
| } |
| } |
| { |
| wuffs_base__status z = wuffs_deflate__decoder__initialize( |
| &self->private_data.f_flate, sizeof(self->private_data.f_flate), |
| WUFFS_VERSION, initialize_flags); |
| if (z) { |
| return z; |
| } |
| } |
| self->private_impl.magic = WUFFS_BASE__MAGIC; |
| return NULL; |
| } |
| |
| size_t // |
| sizeof__wuffs_gzip__decoder() { |
| return sizeof(wuffs_gzip__decoder); |
| } |
| |
| // ---------------- Function Implementations |
| |
| // -------- func gzip.decoder.set_ignore_checksum |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_gzip__decoder__set_ignore_checksum(wuffs_gzip__decoder* self, bool a_ic) { |
| if (!self) { |
| return wuffs_base__make_empty_struct(); |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| self->private_impl.f_ignore_checksum = a_ic; |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // -------- func gzip.decoder.workbuf_len |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_gzip__decoder__workbuf_len(const wuffs_gzip__decoder* self) { |
| if (!self) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| |
| return wuffs_base__utility__make_range_ii_u64(1, 1); |
| } |
| |
| // -------- func gzip.decoder.decode_io_writer |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_gzip__decoder__decode_io_writer(wuffs_gzip__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return (self->private_impl.magic == WUFFS_BASE__DISABLED) |
| ? wuffs_base__error__disabled_by_previous_error |
| : wuffs_base__error__initialize_not_called; |
| } |
| if (!a_dst || !a_src) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__bad_argument; |
| } |
| if ((self->private_impl.active_coroutine != 0) && |
| (self->private_impl.active_coroutine != 1)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__interleaved_coroutine_calls; |
| } |
| self->private_impl.active_coroutine = 0; |
| wuffs_base__status status = NULL; |
| |
| uint8_t v_c = 0; |
| uint8_t v_flags = 0; |
| uint16_t v_xlen = 0; |
| uint64_t v_mark = 0; |
| uint32_t v_checksum_got = 0; |
| uint32_t v_decoded_length_got = 0; |
| wuffs_base__status v_status = NULL; |
| uint32_t v_checksum_want = 0; |
| uint32_t v_decoded_length_want = 0; |
| |
| uint8_t* iop_a_dst = NULL; |
| uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_dst) { |
| io0_a_dst = a_dst->data.ptr; |
| io1_a_dst = io0_a_dst + a_dst->meta.wi; |
| iop_a_dst = io1_a_dst; |
| io2_a_dst = io0_a_dst + a_dst->data.len; |
| if (a_dst->meta.closed) { |
| io2_a_dst = iop_a_dst; |
| } |
| } |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_io_writer[0]; |
| if (coro_susp_point) { |
| v_flags = self->private_data.s_decode_io_writer[0].v_flags; |
| v_checksum_got = self->private_data.s_decode_io_writer[0].v_checksum_got; |
| v_decoded_length_got = |
| self->private_data.s_decode_io_writer[0].v_decoded_length_got; |
| v_checksum_want = self->private_data.s_decode_io_writer[0].v_checksum_want; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_0 = *iop_a_src++; |
| v_c = t_0; |
| } |
| if (v_c != 31) { |
| status = wuffs_gzip__error__bad_header; |
| goto exit; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_1 = *iop_a_src++; |
| v_c = t_1; |
| } |
| if (v_c != 139) { |
| status = wuffs_gzip__error__bad_header; |
| goto exit; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_2 = *iop_a_src++; |
| v_c = t_2; |
| } |
| if (v_c != 8) { |
| status = wuffs_gzip__error__bad_compression_method; |
| goto exit; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_3 = *iop_a_src++; |
| v_flags = t_3; |
| } |
| self->private_data.s_decode_io_writer[0].scratch = 6; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(5); |
| if (self->private_data.s_decode_io_writer[0].scratch > |
| ((uint64_t)(io2_a_src - iop_a_src))) { |
| self->private_data.s_decode_io_writer[0].scratch -= |
| ((uint64_t)(io2_a_src - iop_a_src)); |
| iop_a_src = io2_a_src; |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src += self->private_data.s_decode_io_writer[0].scratch; |
| if ((v_flags & 4) != 0) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); |
| uint16_t t_4; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_4 = wuffs_base__load_u16le(iop_a_src); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_io_writer[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = |
| &self->private_data.s_decode_io_writer[0].scratch; |
| uint32_t num_bits_4 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_4; |
| if (num_bits_4 == 8) { |
| t_4 = ((uint16_t)(*scratch)); |
| break; |
| } |
| num_bits_4 += 8; |
| *scratch |= ((uint64_t)(num_bits_4)) << 56; |
| } |
| } |
| v_xlen = t_4; |
| } |
| self->private_data.s_decode_io_writer[0].scratch = ((uint32_t)(v_xlen)); |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(8); |
| if (self->private_data.s_decode_io_writer[0].scratch > |
| ((uint64_t)(io2_a_src - iop_a_src))) { |
| self->private_data.s_decode_io_writer[0].scratch -= |
| ((uint64_t)(io2_a_src - iop_a_src)); |
| iop_a_src = io2_a_src; |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src += self->private_data.s_decode_io_writer[0].scratch; |
| } |
| if ((v_flags & 8) != 0) { |
| while (true) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_5 = *iop_a_src++; |
| v_c = t_5; |
| } |
| if (v_c == 0) { |
| goto label_0_break; |
| } |
| } |
| label_0_break:; |
| } |
| if ((v_flags & 16) != 0) { |
| while (true) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(10); |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint8_t t_6 = *iop_a_src++; |
| v_c = t_6; |
| } |
| if (v_c == 0) { |
| goto label_1_break; |
| } |
| } |
| label_1_break:; |
| } |
| if ((v_flags & 2) != 0) { |
| self->private_data.s_decode_io_writer[0].scratch = 2; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(11); |
| if (self->private_data.s_decode_io_writer[0].scratch > |
| ((uint64_t)(io2_a_src - iop_a_src))) { |
| self->private_data.s_decode_io_writer[0].scratch -= |
| ((uint64_t)(io2_a_src - iop_a_src)); |
| iop_a_src = io2_a_src; |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| iop_a_src += self->private_data.s_decode_io_writer[0].scratch; |
| } |
| if ((v_flags & 224) != 0) { |
| status = wuffs_gzip__error__bad_encoding_flags; |
| goto exit; |
| } |
| while (true) { |
| v_mark = ((uint64_t)(iop_a_dst - io0_a_dst)); |
| { |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| wuffs_base__status t_7 = wuffs_deflate__decoder__decode_io_writer( |
| &self->private_data.f_flate, a_dst, a_src, a_workbuf); |
| if (a_dst) { |
| iop_a_dst = a_dst->data.ptr + a_dst->meta.wi; |
| } |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| v_status = t_7; |
| } |
| if (!self->private_impl.f_ignore_checksum) { |
| v_checksum_got = wuffs_crc32__ieee_hasher__update_u32( |
| &self->private_data.f_checksum, |
| wuffs_base__io__since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)), |
| io0_a_dst)); |
| v_decoded_length_got += |
| ((uint32_t)((wuffs_base__io__count_since( |
| v_mark, ((uint64_t)(iop_a_dst - io0_a_dst))) & |
| 4294967295))); |
| } |
| if (wuffs_base__status__is_ok(v_status)) { |
| goto label_2_break; |
| } |
| status = v_status; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(12); |
| } |
| label_2_break:; |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(13); |
| uint32_t t_8; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) { |
| t_8 = wuffs_base__load_u32le(iop_a_src); |
| iop_a_src += 4; |
| } else { |
| self->private_data.s_decode_io_writer[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(14); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_io_writer[0].scratch; |
| uint32_t num_bits_8 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_8; |
| if (num_bits_8 == 24) { |
| t_8 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_8 += 8; |
| *scratch |= ((uint64_t)(num_bits_8)) << 56; |
| } |
| } |
| v_checksum_want = t_8; |
| } |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(15); |
| uint32_t t_9; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) { |
| t_9 = wuffs_base__load_u32le(iop_a_src); |
| iop_a_src += 4; |
| } else { |
| self->private_data.s_decode_io_writer[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(16); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_io_writer[0].scratch; |
| uint32_t num_bits_9 = ((uint32_t)(*scratch >> 56)); |
| *scratch <<= 8; |
| *scratch >>= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << num_bits_9; |
| if (num_bits_9 == 24) { |
| t_9 = ((uint32_t)(*scratch)); |
| break; |
| } |
| num_bits_9 += 8; |
| *scratch |= ((uint64_t)(num_bits_9)) << 56; |
| } |
| } |
| v_decoded_length_want = t_9; |
| } |
| if (!self->private_impl.f_ignore_checksum && |
| ((v_checksum_got != v_checksum_want) || |
| (v_decoded_length_got != v_decoded_length_want))) { |
| status = wuffs_gzip__error__bad_checksum; |
| goto exit; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_io_writer[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_io_writer[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_impl.active_coroutine = |
| wuffs_base__status__is_suspension(status) ? 1 : 0; |
| self->private_data.s_decode_io_writer[0].v_flags = v_flags; |
| self->private_data.s_decode_io_writer[0].v_checksum_got = v_checksum_got; |
| self->private_data.s_decode_io_writer[0].v_decoded_length_got = |
| v_decoded_length_got; |
| self->private_data.s_decode_io_writer[0].v_checksum_want = v_checksum_want; |
| |
| goto exit; |
| exit: |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| if (wuffs_base__status__is_error(status)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| } |
| return status; |
| } |
| |
| #endif // !defined(WUFFS_CONFIG__MODULES) || |
| // defined(WUFFS_CONFIG__MODULE__GZIP) |
| |
| #if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__ZLIB) |
| |
| // ---------------- Status Codes Implementations |
| |
| const char* wuffs_zlib__warning__dictionary_required = |
| "@zlib: dictionary required"; |
| const char* wuffs_zlib__error__bad_checksum = "#zlib: bad checksum"; |
| const char* wuffs_zlib__error__bad_compression_method = |
| "#zlib: bad compression method"; |
| const char* wuffs_zlib__error__bad_compression_window_size = |
| "#zlib: bad compression window size"; |
| const char* wuffs_zlib__error__bad_parity_check = "#zlib: bad parity check"; |
| const char* wuffs_zlib__error__incorrect_dictionary = |
| "#zlib: incorrect dictionary"; |
| |
| // ---------------- Private Consts |
| |
| // ---------------- Private Initializer Prototypes |
| |
| // ---------------- Private Function Prototypes |
| |
| // ---------------- Initializer Implementations |
| |
| wuffs_base__status WUFFS_BASE__WARN_UNUSED_RESULT // |
| wuffs_zlib__decoder__initialize(wuffs_zlib__decoder* self, |
| size_t sizeof_star_self, |
| uint64_t wuffs_version, |
| uint32_t initialize_flags) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (sizeof(*self) != sizeof_star_self) { |
| return wuffs_base__error__bad_sizeof_receiver; |
| } |
| if (((wuffs_version >> 32) != WUFFS_VERSION_MAJOR) || |
| (((wuffs_version >> 16) & 0xFFFF) > WUFFS_VERSION_MINOR)) { |
| return wuffs_base__error__bad_wuffs_version; |
| } |
| |
| if ((initialize_flags & WUFFS_INITIALIZE__ALREADY_ZEROED) != 0) { |
| // The whole point of this if-check is to detect an uninitialized *self. |
| // We disable the warning on GCC. Clang-5.0 does not have this warning. |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wmaybe-uninitialized" |
| #endif |
| if (self->private_impl.magic != 0) { |
| return wuffs_base__error__initialize_falsely_claimed_already_zeroed; |
| } |
| #if !defined(__clang__) && defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| } else { |
| if ((initialize_flags & |
| WUFFS_INITIALIZE__LEAVE_INTERNAL_BUFFERS_UNINITIALIZED) == 0) { |
| memset(self, 0, sizeof(*self)); |
| initialize_flags |= WUFFS_INITIALIZE__ALREADY_ZEROED; |
| } else { |
| memset(&(self->private_impl), 0, sizeof(self->private_impl)); |
| } |
| } |
| |
| { |
| wuffs_base__status z = wuffs_adler32__hasher__initialize( |
| &self->private_data.f_checksum, sizeof(self->private_data.f_checksum), |
| WUFFS_VERSION, initialize_flags); |
| if (z) { |
| return z; |
| } |
| } |
| { |
| wuffs_base__status z = wuffs_adler32__hasher__initialize( |
| &self->private_data.f_dict_id_hasher, |
| sizeof(self->private_data.f_dict_id_hasher), WUFFS_VERSION, |
| initialize_flags); |
| if (z) { |
| return z; |
| } |
| } |
| { |
| wuffs_base__status z = wuffs_deflate__decoder__initialize( |
| &self->private_data.f_flate, sizeof(self->private_data.f_flate), |
| WUFFS_VERSION, initialize_flags); |
| if (z) { |
| return z; |
| } |
| } |
| self->private_impl.magic = WUFFS_BASE__MAGIC; |
| return NULL; |
| } |
| |
| size_t // |
| sizeof__wuffs_zlib__decoder() { |
| return sizeof(wuffs_zlib__decoder); |
| } |
| |
| // ---------------- Function Implementations |
| |
| // -------- func zlib.decoder.dictionary_id |
| |
| WUFFS_BASE__MAYBE_STATIC uint32_t // |
| wuffs_zlib__decoder__dictionary_id(const wuffs_zlib__decoder* self) { |
| if (!self) { |
| return 0; |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return 0; |
| } |
| |
| return self->private_impl.f_dict_id_want; |
| } |
| |
| // -------- func zlib.decoder.add_dictionary |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_zlib__decoder__add_dictionary(wuffs_zlib__decoder* self, |
| wuffs_base__slice_u8 a_dict) { |
| if (!self) { |
| return wuffs_base__make_empty_struct(); |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| if (self->private_impl.f_header_complete) { |
| self->private_impl.f_bad_call_sequence = true; |
| } else { |
| self->private_impl.f_dict_id_got = wuffs_adler32__hasher__update_u32( |
| &self->private_data.f_dict_id_hasher, a_dict); |
| wuffs_deflate__decoder__add_history(&self->private_data.f_flate, a_dict); |
| } |
| self->private_impl.f_got_dictionary = true; |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // -------- func zlib.decoder.set_ignore_checksum |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__empty_struct // |
| wuffs_zlib__decoder__set_ignore_checksum(wuffs_zlib__decoder* self, bool a_ic) { |
| if (!self) { |
| return wuffs_base__make_empty_struct(); |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| self->private_impl.f_ignore_checksum = a_ic; |
| return wuffs_base__make_empty_struct(); |
| } |
| |
| // -------- func zlib.decoder.workbuf_len |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__range_ii_u64 // |
| wuffs_zlib__decoder__workbuf_len(const wuffs_zlib__decoder* self) { |
| if (!self) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| if ((self->private_impl.magic != WUFFS_BASE__MAGIC) && |
| (self->private_impl.magic != WUFFS_BASE__DISABLED)) { |
| return wuffs_base__utility__make_range_ii_u64(0, 0); |
| } |
| |
| return wuffs_base__utility__make_range_ii_u64(1, 1); |
| } |
| |
| // -------- func zlib.decoder.decode_io_writer |
| |
| WUFFS_BASE__MAYBE_STATIC wuffs_base__status // |
| wuffs_zlib__decoder__decode_io_writer(wuffs_zlib__decoder* self, |
| wuffs_base__io_buffer* a_dst, |
| wuffs_base__io_buffer* a_src, |
| wuffs_base__slice_u8 a_workbuf) { |
| if (!self) { |
| return wuffs_base__error__bad_receiver; |
| } |
| if (self->private_impl.magic != WUFFS_BASE__MAGIC) { |
| return (self->private_impl.magic == WUFFS_BASE__DISABLED) |
| ? wuffs_base__error__disabled_by_previous_error |
| : wuffs_base__error__initialize_not_called; |
| } |
| if (!a_dst || !a_src) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__bad_argument; |
| } |
| if ((self->private_impl.active_coroutine != 0) && |
| (self->private_impl.active_coroutine != 1)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| return wuffs_base__error__interleaved_coroutine_calls; |
| } |
| self->private_impl.active_coroutine = 0; |
| wuffs_base__status status = NULL; |
| |
| uint16_t v_x = 0; |
| uint32_t v_checksum_got = 0; |
| wuffs_base__status v_status = NULL; |
| uint32_t v_checksum_want = 0; |
| uint64_t v_mark = 0; |
| |
| uint8_t* iop_a_dst = NULL; |
| uint8_t* io0_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_dst WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_dst) { |
| io0_a_dst = a_dst->data.ptr; |
| io1_a_dst = io0_a_dst + a_dst->meta.wi; |
| iop_a_dst = io1_a_dst; |
| io2_a_dst = io0_a_dst + a_dst->data.len; |
| if (a_dst->meta.closed) { |
| io2_a_dst = iop_a_dst; |
| } |
| } |
| uint8_t* iop_a_src = NULL; |
| uint8_t* io0_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io1_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| uint8_t* io2_a_src WUFFS_BASE__POTENTIALLY_UNUSED = NULL; |
| if (a_src) { |
| io0_a_src = a_src->data.ptr; |
| io1_a_src = io0_a_src + a_src->meta.ri; |
| iop_a_src = io1_a_src; |
| io2_a_src = io0_a_src + a_src->meta.wi; |
| } |
| |
| uint32_t coro_susp_point = self->private_impl.p_decode_io_writer[0]; |
| if (coro_susp_point) { |
| v_checksum_got = self->private_data.s_decode_io_writer[0].v_checksum_got; |
| } |
| switch (coro_susp_point) { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_0; |
| |
| if (self->private_impl.f_bad_call_sequence) { |
| status = wuffs_base__error__bad_call_sequence; |
| goto exit; |
| } else if (!self->private_impl.f_want_dictionary) { |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(1); |
| uint16_t t_0; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 2)) { |
| t_0 = wuffs_base__load_u16be(iop_a_src); |
| iop_a_src += 2; |
| } else { |
| self->private_data.s_decode_io_writer[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(2); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = |
| &self->private_data.s_decode_io_writer[0].scratch; |
| uint32_t num_bits_0 = ((uint32_t)(*scratch & 0xFF)); |
| *scratch >>= 8; |
| *scratch <<= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_0); |
| if (num_bits_0 == 8) { |
| t_0 = ((uint16_t)(*scratch >> 48)); |
| break; |
| } |
| num_bits_0 += 8; |
| *scratch |= ((uint64_t)(num_bits_0)); |
| } |
| } |
| v_x = t_0; |
| } |
| if (((v_x >> 8) & 15) != 8) { |
| status = wuffs_zlib__error__bad_compression_method; |
| goto exit; |
| } |
| if ((v_x >> 12) > 7) { |
| status = wuffs_zlib__error__bad_compression_window_size; |
| goto exit; |
| } |
| if ((v_x % 31) != 0) { |
| status = wuffs_zlib__error__bad_parity_check; |
| goto exit; |
| } |
| self->private_impl.f_want_dictionary = ((v_x & 32) != 0); |
| if (self->private_impl.f_want_dictionary) { |
| self->private_impl.f_dict_id_got = 1; |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(3); |
| uint32_t t_1; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) { |
| t_1 = wuffs_base__load_u32be(iop_a_src); |
| iop_a_src += 4; |
| } else { |
| self->private_data.s_decode_io_writer[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(4); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = |
| &self->private_data.s_decode_io_writer[0].scratch; |
| uint32_t num_bits_1 = ((uint32_t)(*scratch & 0xFF)); |
| *scratch >>= 8; |
| *scratch <<= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_1); |
| if (num_bits_1 == 24) { |
| t_1 = ((uint32_t)(*scratch >> 32)); |
| break; |
| } |
| num_bits_1 += 8; |
| *scratch |= ((uint64_t)(num_bits_1)); |
| } |
| } |
| self->private_impl.f_dict_id_want = t_1; |
| } |
| status = wuffs_zlib__warning__dictionary_required; |
| goto ok; |
| } else if (self->private_impl.f_got_dictionary) { |
| status = wuffs_zlib__error__incorrect_dictionary; |
| goto exit; |
| } |
| } else if (self->private_impl.f_dict_id_got != |
| self->private_impl.f_dict_id_want) { |
| if (self->private_impl.f_got_dictionary) { |
| status = wuffs_zlib__error__incorrect_dictionary; |
| goto exit; |
| } |
| status = wuffs_zlib__warning__dictionary_required; |
| goto ok; |
| } |
| self->private_impl.f_header_complete = true; |
| while (true) { |
| v_mark = ((uint64_t)(iop_a_dst - io0_a_dst)); |
| { |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| wuffs_base__status t_2 = wuffs_deflate__decoder__decode_io_writer( |
| &self->private_data.f_flate, a_dst, a_src, a_workbuf); |
| if (a_dst) { |
| iop_a_dst = a_dst->data.ptr + a_dst->meta.wi; |
| } |
| if (a_src) { |
| iop_a_src = a_src->data.ptr + a_src->meta.ri; |
| } |
| v_status = t_2; |
| } |
| if (!self->private_impl.f_ignore_checksum) { |
| v_checksum_got = wuffs_adler32__hasher__update_u32( |
| &self->private_data.f_checksum, |
| wuffs_base__io__since(v_mark, ((uint64_t)(iop_a_dst - io0_a_dst)), |
| io0_a_dst)); |
| } |
| if (wuffs_base__status__is_ok(v_status)) { |
| goto label_0_break; |
| } |
| status = v_status; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT_MAYBE_SUSPEND(5); |
| } |
| label_0_break:; |
| { |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(6); |
| uint32_t t_3; |
| if (WUFFS_BASE__LIKELY(io2_a_src - iop_a_src >= 4)) { |
| t_3 = wuffs_base__load_u32be(iop_a_src); |
| iop_a_src += 4; |
| } else { |
| self->private_data.s_decode_io_writer[0].scratch = 0; |
| WUFFS_BASE__COROUTINE_SUSPENSION_POINT(7); |
| while (true) { |
| if (WUFFS_BASE__UNLIKELY(iop_a_src == io2_a_src)) { |
| status = wuffs_base__suspension__short_read; |
| goto suspend; |
| } |
| uint64_t* scratch = &self->private_data.s_decode_io_writer[0].scratch; |
| uint32_t num_bits_3 = ((uint32_t)(*scratch & 0xFF)); |
| *scratch >>= 8; |
| *scratch <<= 8; |
| *scratch |= ((uint64_t)(*iop_a_src++)) << (56 - num_bits_3); |
| if (num_bits_3 == 24) { |
| t_3 = ((uint32_t)(*scratch >> 32)); |
| break; |
| } |
| num_bits_3 += 8; |
| *scratch |= ((uint64_t)(num_bits_3)); |
| } |
| } |
| v_checksum_want = t_3; |
| } |
| if (!self->private_impl.f_ignore_checksum && |
| (v_checksum_got != v_checksum_want)) { |
| status = wuffs_zlib__error__bad_checksum; |
| goto exit; |
| } |
| |
| goto ok; |
| ok: |
| self->private_impl.p_decode_io_writer[0] = 0; |
| goto exit; |
| } |
| |
| goto suspend; |
| suspend: |
| self->private_impl.p_decode_io_writer[0] = |
| wuffs_base__status__is_suspension(status) ? coro_susp_point : 0; |
| self->private_impl.active_coroutine = |
| wuffs_base__status__is_suspension(status) ? 1 : 0; |
| self->private_data.s_decode_io_writer[0].v_checksum_got = v_checksum_got; |
| |
| goto exit; |
| exit: |
| if (a_dst) { |
| a_dst->meta.wi = ((size_t)(iop_a_dst - a_dst->data.ptr)); |
| } |
| if (a_src) { |
| a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr)); |
| } |
| |
| if (wuffs_base__status__is_error(status)) { |
| self->private_impl.magic = WUFFS_BASE__DISABLED; |
| } |
| return status; |
| } |
| |
| #endif // !defined(WUFFS_CONFIG__MODULES) || |
| // defined(WUFFS_CONFIG__MODULE__ZLIB) |
| |
| #endif // WUFFS_IMPLEMENTATION |
| |
| #endif // WUFFS_INCLUDE_GUARD |