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brotli: Sync with upstream 1.1.0

Browse Source 
https://github.com/google/brotli/releases/tag/v1.1.0
(cherry picked from commit 0402205ce6)
This commit is contained in:
Rémi Verschelde 2023-09-30 12:52:40 +02:00
parent 49c20ecd19
commit 574a5e59f3
No known key found for this signature in database
GPG Key ID: C3336907360768E1
12 changed files with 450 additions and 325 deletions
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2
thirdparty/README.md vendored
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@ -8,7 +8,7 @@ readability.
## brotli
- Upstream: https://github.com/google/brotli
- Version: git (ed1995b6bda19244070ab5d331111f16f67c8054, 2023)
- Version: 1.1.0 (ed738e842d2fbdf2d6459e39267a633c4a9b2f5d, 2023)
- License: MIT
Files extracted from upstream source:

26
thirdparty/brotli/common/platform.h vendored
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@ -14,10 +14,11 @@
* BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations
* BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs
* BROTLI_BUILD_NO_UNALIGNED_READ_FAST forces off the fast-unaligned-read
optimizations (mainly for testing purposes).
optimizations (mainly for testing purposes)
* BROTLI_DEBUG dumps file name and line number when decoder detects stream
or memory error
* BROTLI_ENABLE_LOG enables asserts and dumps various state information
* BROTLI_ENABLE_DUMP overrides default "dump" behaviour
*/
#ifndef BROTLI_COMMON_PLATFORM_H_
@ -208,8 +209,13 @@ OR:
#define BROTLI_TARGET_RISCV64
#endif
#if defined(__loongarch_lp64)
#define BROTLI_TARGET_LOONGARCH64
#endif
#if defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8_64) || \
defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64)
defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64) || \
defined(BROTLI_TARGET_LOONGARCH64)
#define BROTLI_TARGET_64_BITS 1
#else
#define BROTLI_TARGET_64_BITS 0
@ -268,7 +274,7 @@ OR:
#define BROTLI_UNALIGNED_READ_FAST (!!0)
#elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \
defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) || \
defined(BROTLI_TARGET_RISCV64)
defined(BROTLI_TARGET_RISCV64) || defined(BROTLI_TARGET_LOONGARCH64)
/* These targets are known to generate efficient code for unaligned reads
* (e.g. a single instruction, not multiple 1-byte loads, shifted and or'd
* together). */
@ -402,14 +408,24 @@ static BROTLI_INLINE void BROTLI_UNALIGNED_STORE_PTR(void* p, const void* v) {
#endif
#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG)
#define BROTLI_ENABLE_DUMP_DEFAULT 1
#define BROTLI_DCHECK(x) assert(x)
#else
#define BROTLI_ENABLE_DUMP_DEFAULT 0
#define BROTLI_DCHECK(x)
#endif
#if !defined(BROTLI_ENABLE_DUMP)
#define BROTLI_ENABLE_DUMP BROTLI_ENABLE_DUMP_DEFAULT
#endif
#if BROTLI_ENABLE_DUMP
static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) {
fprintf(stderr, "%s:%d (%s)\n", f, l, fn);
fflush(stderr);
}
#define BROTLI_DUMP() BrotliDump(__FILE__, __LINE__, __FUNCTION__)
#else
#define BROTLI_DCHECK(x)
#define BROTLI_DUMP() (void)(0)
#endif
@ -517,7 +533,7 @@ BROTLI_UNUSED_FUNCTION void BrotliSuppressUnusedFunctions(void) {
BROTLI_UNUSED(&brotli_max_uint8_t);
BROTLI_UNUSED(&BrotliDefaultAllocFunc);
BROTLI_UNUSED(&BrotliDefaultFreeFunc);
#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG)
#if BROTLI_ENABLE_DUMP
BROTLI_UNUSED(&BrotliDump);
#endif
}

12
thirdparty/brotli/common/shared_dictionary.c vendored
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@ -20,6 +20,8 @@
extern "C" {
#endif
#if defined(BROTLI_EXPERIMENTAL)
#define BROTLI_NUM_ENCODED_LENGTHS (SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH \
- SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH + 1)
@ -442,6 +444,8 @@ static BROTLI_BOOL DecodeSharedDictionary(
return ParseDictionary(encoded, size, dict);
}
#endif /* BROTLI_EXPERIMENTAL */
void BrotliSharedDictionaryDestroyInstance(
BrotliSharedDictionary* dict) {
if (!dict) {
@ -464,9 +468,12 @@ BROTLI_BOOL BrotliSharedDictionaryAttach(
if (!dict) {
return BROTLI_FALSE;
}
#if defined(BROTLI_EXPERIMENTAL)
if (type == BROTLI_SHARED_DICTIONARY_SERIALIZED) {
return DecodeSharedDictionary(data, data_size, dict);
} else if (type == BROTLI_SHARED_DICTIONARY_RAW) {
}
#endif /* BROTLI_EXPERIMENTAL */
if (type == BROTLI_SHARED_DICTIONARY_RAW) {
if (dict->num_prefix >= SHARED_BROTLI_MAX_COMPOUND_DICTS) {
return BROTLI_FALSE;
}
@ -474,9 +481,8 @@ BROTLI_BOOL BrotliSharedDictionaryAttach(
dict->prefix[dict->num_prefix] = data;
dict->num_prefix++;
return BROTLI_TRUE;
} else {
return BROTLI_FALSE;
}
return BROTLI_FALSE;
}
BrotliSharedDictionary* BrotliSharedDictionaryCreateInstance(

37
thirdparty/brotli/common/version.h vendored
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@ -9,18 +9,43 @@
#ifndef BROTLI_COMMON_VERSION_H_
#define BROTLI_COMMON_VERSION_H_
/* This macro should only be used when library is compiled together with client.
If library is dynamically linked, use BrotliDecoderVersion and
/* Compose 3 components into a single number. In a hexadecimal representation
B and C components occupy exactly 3 digits. */
#define BROTLI_MAKE_HEX_VERSION(A, B, C) ((A << 24) | (B << 12) | C)
/* Those macros should only be used when library is compiled together with
the client. If library is dynamically linked, use BrotliDecoderVersion and
BrotliEncoderVersion methods. */
/* Semantic version, calculated as (MAJOR << 24) | (MINOR << 12) | PATCH */
#define BROTLI_VERSION 0x1000009
#define BROTLI_VERSION_MAJOR 1
#define BROTLI_VERSION_MINOR 1
#define BROTLI_VERSION_PATCH 0
#define BROTLI_VERSION BROTLI_MAKE_HEX_VERSION( \
BROTLI_VERSION_MAJOR, BROTLI_VERSION_MINOR, BROTLI_VERSION_PATCH)
/* This macro is used by build system to produce Libtool-friendly soname. See
https://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html
Version evolution rules:
- interfaces added (or change is compatible) -> current+1:0:age+1
- interfaces removed (or changed is incompatible) -> current+1:0:0
- interfaces not changed -> current:revision+1:age
*/
/* ABI version, calculated as (CURRENT << 24) | (REVISION << 12) | AGE */
#define BROTLI_ABI_VERSION 0x1009000
#define BROTLI_ABI_CURRENT 2
#define BROTLI_ABI_REVISION 0
#define BROTLI_ABI_AGE 1
#if BROTLI_VERSION_MAJOR != (BROTLI_ABI_CURRENT - BROTLI_ABI_AGE)
#error ABI/API version inconsistency
#endif
#if BROTLI_VERSION_MINOR != BROTLI_ABI_AGE
#error ABI/API version inconsistency
#endif
#if BROTLI_VERSION_PATCH != BROTLI_ABI_REVISION
#error ABI/API version inconsistency
#endif
#endif /* BROTLI_COMMON_VERSION_H_ */

11
thirdparty/brotli/dec/bit_reader.c vendored
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@ -16,7 +16,7 @@
extern "C" {
#endif
const uint32_t kBrotliBitMask[33] = { 0x00000000,
const brotli_reg_t kBrotliBitMask[33] = { 0x00000000,
0x00000001, 0x00000003, 0x00000007, 0x0000000F,
0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF,
0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF,
@ -29,7 +29,7 @@ const uint32_t kBrotliBitMask[33] = { 0x00000000,
void BrotliInitBitReader(BrotliBitReader* const br) {
br->val_ = 0;
br->bit_pos_ = sizeof(br->val_) << 3;
br->bit_pos_ = 0;
}
BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br) {
@ -41,6 +41,7 @@ BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br) {
aligned_read_mask = 0;
}
if (BrotliGetAvailableBits(br) == 0) {
br->val_ = 0;
if (!BrotliPullByte(br)) {
return BROTLI_FALSE;
}
@ -56,9 +57,9 @@ BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br) {
}
BROTLI_BOOL BrotliSafeReadBits32Slow(BrotliBitReader* const br,
uint32_t n_bits, uint32_t* val) {
uint32_t low_val;
uint32_t high_val;
brotli_reg_t n_bits, brotli_reg_t* val) {
brotli_reg_t low_val;
brotli_reg_t high_val;
BrotliBitReaderState memento;
BROTLI_DCHECK(n_bits <= 32);
BROTLI_DCHECK(n_bits > 24);

255
thirdparty/brotli/dec/bit_reader.h vendored
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@ -22,13 +22,16 @@ extern "C" {
#define BROTLI_SHORT_FILL_BIT_WINDOW_READ (sizeof(brotli_reg_t) >> 1)
BROTLI_INTERNAL extern const uint32_t kBrotliBitMask[33];
/* 162 bits + 7 bytes */
#define BROTLI_FAST_INPUT_SLACK 28
static BROTLI_INLINE uint32_t BitMask(uint32_t n) {
BROTLI_INTERNAL extern const brotli_reg_t kBrotliBitMask[33];
static BROTLI_INLINE brotli_reg_t BitMask(brotli_reg_t n) {
if (BROTLI_IS_CONSTANT(n) || BROTLI_HAS_UBFX) {
/* Masking with this expression turns to a single
"Unsigned Bit Field Extract" UBFX instruction on ARM. */
return ~((0xFFFFFFFFu) << n);
return ~(~((brotli_reg_t)0) << n);
} else {
return kBrotliBitMask[n];
}
@ -36,40 +39,57 @@ static BROTLI_INLINE uint32_t BitMask(uint32_t n) {
typedef struct {
brotli_reg_t val_; /* pre-fetched bits */
uint32_t bit_pos_; /* current bit-reading position in val_ */
brotli_reg_t bit_pos_; /* current bit-reading position in val_ */
const uint8_t* next_in; /* the byte we're reading from */
size_t avail_in;
const uint8_t* guard_in; /* position from which "fast-path" is prohibited */
const uint8_t* last_in; /* == next_in + avail_in */
} BrotliBitReader;
typedef struct {
brotli_reg_t val_;
uint32_t bit_pos_;
brotli_reg_t bit_pos_;
const uint8_t* next_in;
size_t avail_in;
} BrotliBitReaderState;
/* Initializes the BrotliBitReader fields. */
BROTLI_INTERNAL void BrotliInitBitReader(BrotliBitReader* const br);
BROTLI_INTERNAL void BrotliInitBitReader(BrotliBitReader* br);
/* Ensures that accumulator is not empty.
May consume up to sizeof(brotli_reg_t) - 1 bytes of input.
Returns BROTLI_FALSE if data is required but there is no input available.
For !BROTLI_UNALIGNED_READ_FAST this function also prepares bit reader for
aligned reading. */
BROTLI_INTERNAL BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br);
BROTLI_INTERNAL BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* br);
/* Fallback for BrotliSafeReadBits32. Extracted as noninlined method to unburden
the main code-path. Never called for RFC brotli streams, required only for
"large-window" mode and other extensions. */
BROTLI_INTERNAL BROTLI_NOINLINE BROTLI_BOOL BrotliSafeReadBits32Slow(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val);
BrotliBitReader* br, brotli_reg_t n_bits, brotli_reg_t* val);
static BROTLI_INLINE size_t
BrotliBitReaderGetAvailIn(BrotliBitReader* const br) {
return (size_t)(br->last_in - br->next_in);
}
static BROTLI_INLINE void BrotliBitReaderSaveState(
BrotliBitReader* const from, BrotliBitReaderState* to) {
to->val_ = from->val_;
to->bit_pos_ = from->bit_pos_;
to->next_in = from->next_in;
to->avail_in = from->avail_in;
to->avail_in = BrotliBitReaderGetAvailIn(from);
}
static BROTLI_INLINE void BrotliBitReaderSetInput(
BrotliBitReader* const br, const uint8_t* next_in, size_t avail_in) {
br->next_in = next_in;
br->last_in = (avail_in == 0) ? next_in : (next_in + avail_in);
if (avail_in + 1 > BROTLI_FAST_INPUT_SLACK) {
br->guard_in = next_in + (avail_in + 1 - BROTLI_FAST_INPUT_SLACK);
} else {
br->guard_in = next_in;
}
}
static BROTLI_INLINE void BrotliBitReaderRestoreState(
@ -77,12 +97,12 @@ static BROTLI_INLINE void BrotliBitReaderRestoreState(
to->val_ = from->val_;
to->bit_pos_ = from->bit_pos_;
to->next_in = from->next_in;
to->avail_in = from->avail_in;
BrotliBitReaderSetInput(to, from->next_in, from->avail_in);
}
static BROTLI_INLINE uint32_t BrotliGetAvailableBits(
static BROTLI_INLINE brotli_reg_t BrotliGetAvailableBits(
const BrotliBitReader* br) {
return (BROTLI_64_BITS ? 64 : 32) - br->bit_pos_;
return br->bit_pos_;
}
/* Returns amount of unread bytes the bit reader still has buffered from the
@ -90,15 +110,27 @@ static BROTLI_INLINE uint32_t BrotliGetAvailableBits(
maximal ring-buffer size (larger number won't be utilized anyway). */
static BROTLI_INLINE size_t BrotliGetRemainingBytes(BrotliBitReader* br) {
static const size_t kCap = (size_t)1 << BROTLI_LARGE_MAX_WBITS;
if (br->avail_in > kCap) return kCap;
return br->avail_in + (BrotliGetAvailableBits(br) >> 3);
size_t avail_in = BrotliBitReaderGetAvailIn(br);
if (avail_in > kCap) return kCap;
return avail_in + (BrotliGetAvailableBits(br) >> 3);
}
/* Checks if there is at least |num| bytes left in the input ring-buffer
(excluding the bits remaining in br->val_). */
static BROTLI_INLINE BROTLI_BOOL BrotliCheckInputAmount(
BrotliBitReader* const br, size_t num) {
return TO_BROTLI_BOOL(br->avail_in >= num);
BrotliBitReader* const br) {
return TO_BROTLI_BOOL(br->next_in < br->guard_in);
}
/* Load more bits into accumulator. */
static BROTLI_INLINE brotli_reg_t BrotliBitReaderLoadBits(brotli_reg_t val,
brotli_reg_t new_bits,
brotli_reg_t count,
brotli_reg_t offset) {
BROTLI_DCHECK(
!((val >> offset) & ~new_bits & ~(~((brotli_reg_t)0) << count)));
(void)count;
return val | (new_bits << offset);
}
/* Guarantees that there are at least |n_bits| + 1 bits in accumulator.
@ -106,61 +138,51 @@ static BROTLI_INLINE BROTLI_BOOL BrotliCheckInputAmount(
|n_bits| should be in the range [1..24] for regular build. For portable
non-64-bit little-endian build only 16 bits are safe to request. */
static BROTLI_INLINE void BrotliFillBitWindow(
BrotliBitReader* const br, uint32_t n_bits) {
BrotliBitReader* const br, brotli_reg_t n_bits) {
#if (BROTLI_64_BITS)
if (BROTLI_UNALIGNED_READ_FAST && BROTLI_IS_CONSTANT(n_bits) &&
(n_bits <= 8)) {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 56) {
br->val_ =
(br->val_ >> 56) | (BROTLI_UNALIGNED_LOAD64LE(br->next_in) << 8);
br->bit_pos_ =
bit_pos ^ 56; /* here same as -= 56 because of the if condition */
br->avail_in -= 7;
brotli_reg_t bit_pos = br->bit_pos_;
if (bit_pos <= 8) {
br->val_ = BrotliBitReaderLoadBits(br->val_,
BROTLI_UNALIGNED_LOAD64LE(br->next_in), 56, bit_pos);
br->bit_pos_ = bit_pos + 56;
br->next_in += 7;
}
} else if (BROTLI_UNALIGNED_READ_FAST && BROTLI_IS_CONSTANT(n_bits) &&
(n_bits <= 16)) {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 48) {
br->val_ =
(br->val_ >> 48) | (BROTLI_UNALIGNED_LOAD64LE(br->next_in) << 16);
br->bit_pos_ =
bit_pos ^ 48; /* here same as -= 48 because of the if condition */
br->avail_in -= 6;
brotli_reg_t bit_pos = br->bit_pos_;
if (bit_pos <= 16) {
br->val_ = BrotliBitReaderLoadBits(br->val_,
BROTLI_UNALIGNED_LOAD64LE(br->next_in), 48, bit_pos);
br->bit_pos_ = bit_pos + 48;
br->next_in += 6;
}
} else {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 32) {
br->val_ = (br->val_ >> 32) |
(((uint64_t)BROTLI_UNALIGNED_LOAD32LE(br->next_in)) << 32);
br->bit_pos_ =
bit_pos ^ 32; /* here same as -= 32 because of the if condition */
br->avail_in -= BROTLI_SHORT_FILL_BIT_WINDOW_READ;
brotli_reg_t bit_pos = br->bit_pos_;
if (bit_pos <= 32) {
br->val_ = BrotliBitReaderLoadBits(br->val_,
(uint64_t)BROTLI_UNALIGNED_LOAD32LE(br->next_in), 32, bit_pos);
br->bit_pos_ = bit_pos + 32;
br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ;
}
}
#else
if (BROTLI_UNALIGNED_READ_FAST && BROTLI_IS_CONSTANT(n_bits) &&
(n_bits <= 8)) {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 24) {
br->val_ =
(br->val_ >> 24) | (BROTLI_UNALIGNED_LOAD32LE(br->next_in) << 8);
br->bit_pos_ =
bit_pos ^ 24; /* here same as -= 24 because of the if condition */
br->avail_in -= 3;
brotli_reg_t bit_pos = br->bit_pos_;
if (bit_pos <= 8) {
br->val_ = BrotliBitReaderLoadBits(br->val_,
BROTLI_UNALIGNED_LOAD32LE(br->next_in), 24, bit_pos);
br->bit_pos_ = bit_pos + 24;
br->next_in += 3;
}
} else {
uint32_t bit_pos = br->bit_pos_;
if (bit_pos >= 16) {
br->val_ = (br->val_ >> 16) |
(((uint32_t)BROTLI_UNALIGNED_LOAD16LE(br->next_in)) << 16);
br->bit_pos_ =
bit_pos ^ 16; /* here same as -= 16 because of the if condition */
br->avail_in -= BROTLI_SHORT_FILL_BIT_WINDOW_READ;
brotli_reg_t bit_pos = br->bit_pos_;
if (bit_pos <= 16) {
br->val_ = BrotliBitReaderLoadBits(br->val_,
(uint32_t)BROTLI_UNALIGNED_LOAD16LE(br->next_in), 16, bit_pos);
br->bit_pos_ = bit_pos + 16;
br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ;
}
}
@ -176,17 +198,12 @@ static BROTLI_INLINE void BrotliFillBitWindow16(BrotliBitReader* const br) {
/* Tries to pull one byte of input to accumulator.
Returns BROTLI_FALSE if there is no input available. */
static BROTLI_INLINE BROTLI_BOOL BrotliPullByte(BrotliBitReader* const br) {
if (br->avail_in == 0) {
if (br->next_in == br->last_in) {
return BROTLI_FALSE;
}
br->val_ >>= 8;
#if (BROTLI_64_BITS)
br->val_ |= ((uint64_t)*br->next_in) << 56;
#else
br->val_ |= ((uint32_t)*br->next_in) << 24;
#endif
br->bit_pos_ -= 8;
--br->avail_in;
br->val_ = BrotliBitReaderLoadBits(br->val_,
(brotli_reg_t)*br->next_in, 8, br->bit_pos_);
br->bit_pos_ += 8;
++br->next_in;
return BROTLI_TRUE;
}
@ -195,81 +212,90 @@ static BROTLI_INLINE BROTLI_BOOL BrotliPullByte(BrotliBitReader* const br) {
The number of valid bits could be calculated by BrotliGetAvailableBits. */
static BROTLI_INLINE brotli_reg_t BrotliGetBitsUnmasked(
BrotliBitReader* const br) {
return br->val_ >> br->bit_pos_;
return br->val_;
}
/* Like BrotliGetBits, but does not mask the result.
The result contains at least 16 valid bits. */
static BROTLI_INLINE uint32_t BrotliGet16BitsUnmasked(
static BROTLI_INLINE brotli_reg_t BrotliGet16BitsUnmasked(
BrotliBitReader* const br) {
BrotliFillBitWindow(br, 16);
return (uint32_t)BrotliGetBitsUnmasked(br);
return (brotli_reg_t)BrotliGetBitsUnmasked(br);
}
/* Returns the specified number of bits from |br| without advancing bit
position. */
static BROTLI_INLINE uint32_t BrotliGetBits(
BrotliBitReader* const br, uint32_t n_bits) {
static BROTLI_INLINE brotli_reg_t BrotliGetBits(
BrotliBitReader* const br, brotli_reg_t n_bits) {
BrotliFillBitWindow(br, n_bits);
return (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
return BrotliGetBitsUnmasked(br) & BitMask(n_bits);
}
/* Tries to peek the specified amount of bits. Returns BROTLI_FALSE, if there
is not enough input. */
static BROTLI_INLINE BROTLI_BOOL BrotliSafeGetBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) {
while (BrotliGetAvailableBits(br) < n_bits) {
if (!BrotliPullByte(br)) {
return BROTLI_FALSE;
}
}
*val = (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
*val = BrotliGetBitsUnmasked(br) & BitMask(n_bits);
return BROTLI_TRUE;
}
/* Advances the bit pos by |n_bits|. */
static BROTLI_INLINE void BrotliDropBits(
BrotliBitReader* const br, uint32_t n_bits) {
br->bit_pos_ += n_bits;
BrotliBitReader* const br, brotli_reg_t n_bits) {
br->bit_pos_ -= n_bits;
br->val_ >>= n_bits;
}
/* Make sure that there are no spectre bits in accumulator.
This is important for the cases when some bytes are skipped
(i.e. never placed into accumulator). */
static BROTLI_INLINE void BrotliBitReaderNormalize(BrotliBitReader* br) {
/* Actually, it is enough to normalize when br->bit_pos_ == 0 */
if (br->bit_pos_ < (sizeof(brotli_reg_t) << 3u)) {
br->val_ &= (((brotli_reg_t)1) << br->bit_pos_) - 1;
}
}
static BROTLI_INLINE void BrotliBitReaderUnload(BrotliBitReader* br) {
uint32_t unused_bytes = BrotliGetAvailableBits(br) >> 3;
uint32_t unused_bits = unused_bytes << 3;
br->avail_in += unused_bytes;
br->next_in -= unused_bytes;
if (unused_bits == sizeof(br->val_) << 3) {
br->val_ = 0;
} else {
br->val_ <<= unused_bits;
}
br->bit_pos_ += unused_bits;
brotli_reg_t unused_bytes = BrotliGetAvailableBits(br) >> 3;
brotli_reg_t unused_bits = unused_bytes << 3;
br->next_in =
(unused_bytes == 0) ? br->next_in : (br->next_in - unused_bytes);
br->bit_pos_ -= unused_bits;
BrotliBitReaderNormalize(br);
}
/* Reads the specified number of bits from |br| and advances the bit pos.
Precondition: accumulator MUST contain at least |n_bits|. */
static BROTLI_INLINE void BrotliTakeBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
*val = (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
static BROTLI_INLINE void BrotliTakeBits(BrotliBitReader* const br,
brotli_reg_t n_bits,
brotli_reg_t* val) {
*val = BrotliGetBitsUnmasked(br) & BitMask(n_bits);
BROTLI_LOG(("[BrotliTakeBits] %d %d %d val: %6x\n",
(int)br->avail_in, (int)br->bit_pos_, (int)n_bits, (int)*val));
(int)BrotliBitReaderGetAvailIn(br), (int)br->bit_pos_,
(int)n_bits, (int)*val));
BrotliDropBits(br, n_bits);
}
/* Reads the specified number of bits from |br| and advances the bit pos.
Assumes that there is enough input to perform BrotliFillBitWindow.
Up to 24 bits are allowed to be requested from this method. */
static BROTLI_INLINE uint32_t BrotliReadBits24(
BrotliBitReader* const br, uint32_t n_bits) {
static BROTLI_INLINE brotli_reg_t BrotliReadBits24(
BrotliBitReader* const br, brotli_reg_t n_bits) {
BROTLI_DCHECK(n_bits <= 24);
if (BROTLI_64_BITS || (n_bits <= 16)) {
uint32_t val;
brotli_reg_t val;
BrotliFillBitWindow(br, n_bits);
BrotliTakeBits(br, n_bits, &val);
return val;
} else {
uint32_t low_val;
uint32_t high_val;
brotli_reg_t low_val;
brotli_reg_t high_val;
BrotliFillBitWindow(br, 16);
BrotliTakeBits(br, 16, &low_val);
BrotliFillBitWindow(br, 8);
@ -279,17 +305,17 @@ static BROTLI_INLINE uint32_t BrotliReadBits24(
}
/* Same as BrotliReadBits24, but allows reading up to 32 bits. */
static BROTLI_INLINE uint32_t BrotliReadBits32(
BrotliBitReader* const br, uint32_t n_bits) {
static BROTLI_INLINE brotli_reg_t BrotliReadBits32(
BrotliBitReader* const br, brotli_reg_t n_bits) {
BROTLI_DCHECK(n_bits <= 32);
if (BROTLI_64_BITS || (n_bits <= 16)) {
uint32_t val;
brotli_reg_t val;
BrotliFillBitWindow(br, n_bits);
BrotliTakeBits(br, n_bits, &val);
return val;
} else {
uint32_t low_val;
uint32_t high_val;
brotli_reg_t low_val;
brotli_reg_t high_val;
BrotliFillBitWindow(br, 16);
BrotliTakeBits(br, 16, &low_val);
BrotliFillBitWindow(br, 16);
@ -302,7 +328,7 @@ static BROTLI_INLINE uint32_t BrotliReadBits32(
is not enough input. |n_bits| MUST be positive.
Up to 24 bits are allowed to be requested from this method. */
static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) {
BROTLI_DCHECK(n_bits <= 24);
while (BrotliGetAvailableBits(br) < n_bits) {
if (!BrotliPullByte(br)) {
@ -315,7 +341,7 @@ static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits(
/* Same as BrotliSafeReadBits, but allows reading up to 32 bits. */
static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits32(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) {
BROTLI_DCHECK(n_bits <= 32);
if (BROTLI_64_BITS || (n_bits <= 24)) {
while (BrotliGetAvailableBits(br) < n_bits) {
@ -333,16 +359,19 @@ static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits32(
/* Advances the bit reader position to the next byte boundary and verifies
that any skipped bits are set to zero. */
static BROTLI_INLINE BROTLI_BOOL BrotliJumpToByteBoundary(BrotliBitReader* br) {
uint32_t pad_bits_count = BrotliGetAvailableBits(br) & 0x7;
uint32_t pad_bits = 0;
brotli_reg_t pad_bits_count = BrotliGetAvailableBits(br) & 0x7;
brotli_reg_t pad_bits = 0;
if (pad_bits_count != 0) {
BrotliTakeBits(br, pad_bits_count, &pad_bits);
}
BrotliBitReaderNormalize(br);
return TO_BROTLI_BOOL(pad_bits == 0);
}
static BROTLI_INLINE void BrotliDropBytes(BrotliBitReader* br, size_t num) {
br->avail_in -= num;
/* Check detour is legal: accumulator must to be empty. */
BROTLI_DCHECK(br->bit_pos_ == 0);
BROTLI_DCHECK(br->val_ == 0);
br->next_in += num;
}
@ -357,12 +386,36 @@ static BROTLI_INLINE void BrotliCopyBytes(uint8_t* dest,
++dest;
--num;
}
BrotliBitReaderNormalize(br);
if (num > 0) {
memcpy(dest, br->next_in, num);
BrotliDropBytes(br, num);
}
}
BROTLI_UNUSED_FUNCTION void BrotliBitReaderSuppressUnusedFunctions(void) {
BROTLI_UNUSED(&BrotliBitReaderSuppressUnusedFunctions);
BROTLI_UNUSED(&BrotliBitReaderGetAvailIn);
BROTLI_UNUSED(&BrotliBitReaderLoadBits);
BROTLI_UNUSED(&BrotliBitReaderRestoreState);
BROTLI_UNUSED(&BrotliBitReaderSaveState);
BROTLI_UNUSED(&BrotliBitReaderSetInput);
BROTLI_UNUSED(&BrotliBitReaderUnload);
BROTLI_UNUSED(&BrotliCheckInputAmount);
BROTLI_UNUSED(&BrotliCopyBytes);
BROTLI_UNUSED(&BrotliFillBitWindow16);
BROTLI_UNUSED(&BrotliGet16BitsUnmasked);
BROTLI_UNUSED(&BrotliGetBits);
BROTLI_UNUSED(&BrotliGetRemainingBytes);
BROTLI_UNUSED(&BrotliJumpToByteBoundary);
BROTLI_UNUSED(&BrotliReadBits24);
BROTLI_UNUSED(&BrotliReadBits32);
BROTLI_UNUSED(&BrotliSafeGetBits);
BROTLI_UNUSED(&BrotliSafeReadBits);
BROTLI_UNUSED(&BrotliSafeReadBits32);
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

342
thirdparty/brotli/dec/decode.c vendored
View File

@ -44,7 +44,7 @@ extern "C" {
- doing up to two 16-byte copies for fast backward copying
- inserting transformed dictionary word:
255 prefix + 32 base + 255 suffix */
static const uint32_t kRingBufferWriteAheadSlack = 542;
static const brotli_reg_t kRingBufferWriteAheadSlack = 542;
static const uint8_t kCodeLengthCodeOrder[BROTLI_CODE_LENGTH_CODES] = {
1, 2, 3, 4, 0, 5, 17, 6, 16, 7, 8, 9, 10, 11, 12, 13, 14, 15,
@ -116,6 +116,10 @@ static BROTLI_NOINLINE BrotliDecoderResult SaveErrorCode(
BrotliDecoderState* s, BrotliDecoderErrorCode e, size_t consumed_input) {
s->error_code = (int)e;
s->used_input += consumed_input;
if ((s->buffer_length != 0) && (s->br.next_in == s->br.last_in)) {
/* If internal buffer is depleted at last, reset it. */
s->buffer_length = 0;
}
switch (e) {
case BROTLI_DECODER_SUCCESS:
return BROTLI_DECODER_RESULT_SUCCESS;
@ -135,7 +139,7 @@ static BROTLI_NOINLINE BrotliDecoderResult SaveErrorCode(
Precondition: bit-reader accumulator has at least 8 bits. */
static BrotliDecoderErrorCode DecodeWindowBits(BrotliDecoderState* s,
BrotliBitReader* br) {
uint32_t n;
brotli_reg_t n;
BROTLI_BOOL large_window = s->large_window;
s->large_window = BROTLI_FALSE;
BrotliTakeBits(br, 1, &n);
@ -145,7 +149,7 @@ static BrotliDecoderErrorCode DecodeWindowBits(BrotliDecoderState* s,
}
BrotliTakeBits(br, 3, &n);
if (n != 0) {
s->window_bits = 17 + n;
s->window_bits = (17u + n) & 63u;
return BROTLI_DECODER_SUCCESS;
}
BrotliTakeBits(br, 3, &n);
@ -162,7 +166,7 @@ static BrotliDecoderErrorCode DecodeWindowBits(BrotliDecoderState* s,
}
}
if (n != 0) {
s->window_bits = 8 + n;
s->window_bits = (8u + n) & 63u;
return BROTLI_DECODER_SUCCESS;
}
s->window_bits = 17;
@ -181,8 +185,8 @@ static BROTLI_INLINE void memmove16(uint8_t* dst, uint8_t* src) {
/* Decodes a number in the range [0..255], by reading 1 - 11 bits. */
static BROTLI_NOINLINE BrotliDecoderErrorCode DecodeVarLenUint8(
BrotliDecoderState* s, BrotliBitReader* br, uint32_t* value) {
uint32_t bits;
BrotliDecoderState* s, BrotliBitReader* br, brotli_reg_t* value) {
brotli_reg_t bits;
switch (s->substate_decode_uint8) {
case BROTLI_STATE_DECODE_UINT8_NONE:
if (BROTLI_PREDICT_FALSE(!BrotliSafeReadBits(br, 1, &bits))) {
@ -226,7 +230,7 @@ static BROTLI_NOINLINE BrotliDecoderErrorCode DecodeVarLenUint8(
/* Decodes a metablock length and flags by reading 2 - 31 bits. */
static BrotliDecoderErrorCode BROTLI_NOINLINE DecodeMetaBlockLength(
BrotliDecoderState* s, BrotliBitReader* br) {
uint32_t bits;
brotli_reg_t bits;
int i;
for (;;) {
switch (s->substate_metablock_header) {
@ -349,13 +353,13 @@ static BrotliDecoderErrorCode BROTLI_NOINLINE DecodeMetaBlockLength(
This method doesn't read data from the bit reader, BUT drops the amount of
bits that correspond to the decoded symbol.
bits MUST contain at least 15 (BROTLI_HUFFMAN_MAX_CODE_LENGTH) valid bits. */
static BROTLI_INLINE uint32_t DecodeSymbol(uint32_t bits,
const HuffmanCode* table,
BrotliBitReader* br) {
static BROTLI_INLINE brotli_reg_t DecodeSymbol(brotli_reg_t bits,
const HuffmanCode* table,
BrotliBitReader* br) {
BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(table);
BROTLI_HC_ADJUST_TABLE_INDEX(table, bits & HUFFMAN_TABLE_MASK);
if (BROTLI_HC_FAST_LOAD_BITS(table) > HUFFMAN_TABLE_BITS) {
uint32_t nbits = BROTLI_HC_FAST_LOAD_BITS(table) - HUFFMAN_TABLE_BITS;
brotli_reg_t nbits = BROTLI_HC_FAST_LOAD_BITS(table) - HUFFMAN_TABLE_BITS;
BrotliDropBits(br, HUFFMAN_TABLE_BITS);
BROTLI_HC_ADJUST_TABLE_INDEX(table,
BROTLI_HC_FAST_LOAD_VALUE(table) +
@ -367,17 +371,17 @@ static BROTLI_INLINE uint32_t DecodeSymbol(uint32_t bits,
/* Reads and decodes the next Huffman code from bit-stream.
This method peeks 16 bits of input and drops 0 - 15 of them. */
static BROTLI_INLINE uint32_t ReadSymbol(const HuffmanCode* table,
BrotliBitReader* br) {
static BROTLI_INLINE brotli_reg_t ReadSymbol(const HuffmanCode* table,
BrotliBitReader* br) {
return DecodeSymbol(BrotliGet16BitsUnmasked(br), table, br);
}
/* Same as DecodeSymbol, but it is known that there is less than 15 bits of
input are currently available. */
static BROTLI_NOINLINE BROTLI_BOOL SafeDecodeSymbol(
const HuffmanCode* table, BrotliBitReader* br, uint32_t* result) {
uint32_t val;
uint32_t available_bits = BrotliGetAvailableBits(br);
const HuffmanCode* table, BrotliBitReader* br, brotli_reg_t* result) {
brotli_reg_t val;
brotli_reg_t available_bits = BrotliGetAvailableBits(br);
BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(table);
if (available_bits == 0) {
if (BROTLI_HC_FAST_LOAD_BITS(table) == 0) {
@ -386,7 +390,7 @@ static BROTLI_NOINLINE BROTLI_BOOL SafeDecodeSymbol(
}
return BROTLI_FALSE; /* No valid bits at all. */
}
val = (uint32_t)BrotliGetBitsUnmasked(br);
val = BrotliGetBitsUnmasked(br);
BROTLI_HC_ADJUST_TABLE_INDEX(table, val & HUFFMAN_TABLE_MASK);
if (BROTLI_HC_FAST_LOAD_BITS(table) <= HUFFMAN_TABLE_BITS) {
if (BROTLI_HC_FAST_LOAD_BITS(table) <= available_bits) {
@ -415,8 +419,8 @@ static BROTLI_NOINLINE BROTLI_BOOL SafeDecodeSymbol(
}
static BROTLI_INLINE BROTLI_BOOL SafeReadSymbol(
const HuffmanCode* table, BrotliBitReader* br, uint32_t* result) {
uint32_t val;
const HuffmanCode* table, BrotliBitReader* br, brotli_reg_t* result) {
brotli_reg_t val;
if (BROTLI_PREDICT_TRUE(BrotliSafeGetBits(br, 15, &val))) {
*result = DecodeSymbol(val, table, br);
return BROTLI_TRUE;
@ -428,8 +432,8 @@ static BROTLI_INLINE BROTLI_BOOL SafeReadSymbol(
static BROTLI_INLINE void PreloadSymbol(int safe,
const HuffmanCode* table,
BrotliBitReader* br,
uint32_t* bits,
uint32_t* value) {
brotli_reg_t* bits,
brotli_reg_t* value) {
if (safe) {
return;
}
@ -441,15 +445,15 @@ static BROTLI_INLINE void PreloadSymbol(int safe,
/* Decodes the next Huffman code using data prepared by PreloadSymbol.
Reads 0 - 15 bits. Also peeks 8 following bits. */
static BROTLI_INLINE uint32_t ReadPreloadedSymbol(const HuffmanCode* table,
static BROTLI_INLINE brotli_reg_t ReadPreloadedSymbol(const HuffmanCode* table,
BrotliBitReader* br,
uint32_t* bits,
uint32_t* value) {
uint32_t result = *value;
brotli_reg_t* bits,
brotli_reg_t* value) {
brotli_reg_t result = *value;
if (BROTLI_PREDICT_FALSE(*bits > HUFFMAN_TABLE_BITS)) {
uint32_t val = BrotliGet16BitsUnmasked(br);
brotli_reg_t val = BrotliGet16BitsUnmasked(br);
const HuffmanCode* ext = table + (val & HUFFMAN_TABLE_MASK) + *value;
uint32_t mask = BitMask((*bits - HUFFMAN_TABLE_BITS));
brotli_reg_t mask = BitMask((*bits - HUFFMAN_TABLE_BITS));
BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(ext);
BrotliDropBits(br, HUFFMAN_TABLE_BITS);
BROTLI_HC_ADJUST_TABLE_INDEX(ext, (val >> HUFFMAN_TABLE_BITS) & mask);
@ -462,8 +466,8 @@ static BROTLI_INLINE uint32_t ReadPreloadedSymbol(const HuffmanCode* table,
return result;
}
static BROTLI_INLINE uint32_t Log2Floor(uint32_t x) {
uint32_t result = 0;
static BROTLI_INLINE brotli_reg_t Log2Floor(brotli_reg_t x) {
brotli_reg_t result = 0;
while (x) {
x >>= 1;
++result;
@ -475,16 +479,16 @@ static BROTLI_INLINE uint32_t Log2Floor(uint32_t x) {
Totally 1..4 symbols are read, 1..11 bits each.
The list of symbols MUST NOT contain duplicates. */
static BrotliDecoderErrorCode ReadSimpleHuffmanSymbols(
uint32_t alphabet_size_max, uint32_t alphabet_size_limit,
brotli_reg_t alphabet_size_max, brotli_reg_t alphabet_size_limit,
BrotliDecoderState* s) {
/* max_bits == 1..11; symbol == 0..3; 1..44 bits will be read. */
BrotliBitReader* br = &s->br;
BrotliMetablockHeaderArena* h = &s->arena.header;
uint32_t max_bits = Log2Floor(alphabet_size_max - 1);
uint32_t i = h->sub_loop_counter;
uint32_t num_symbols = h->symbol;
brotli_reg_t max_bits = Log2Floor(alphabet_size_max - 1);
brotli_reg_t i = h->sub_loop_counter;
brotli_reg_t num_symbols = h->symbol;
while (i <= num_symbols) {
uint32_t v;
brotli_reg_t v;
if (BROTLI_PREDICT_FALSE(!BrotliSafeReadBits(br, max_bits, &v))) {
h->sub_loop_counter = i;
h->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_READ;
@ -500,7 +504,7 @@ static BrotliDecoderErrorCode ReadSimpleHuffmanSymbols(
}
for (i = 0; i < num_symbols; ++i) {
uint32_t k = i + 1;
brotli_reg_t k = i + 1;
for (; k <= num_symbols; ++k) {
if (h->symbols_lists_array[i] == h->symbols_lists_array[k]) {
return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME);
@ -517,9 +521,9 @@ static BrotliDecoderErrorCode ReadSimpleHuffmanSymbols(
C) extend corresponding index-chain
D) reduce the Huffman space
E) update the histogram */
static BROTLI_INLINE void ProcessSingleCodeLength(uint32_t code_len,
uint32_t* symbol, uint32_t* repeat, uint32_t* space,
uint32_t* prev_code_len, uint16_t* symbol_lists,
static BROTLI_INLINE void ProcessSingleCodeLength(brotli_reg_t code_len,
brotli_reg_t* symbol, brotli_reg_t* repeat, brotli_reg_t* space,
brotli_reg_t* prev_code_len, uint16_t* symbol_lists,
uint16_t* code_length_histo, int* next_symbol) {
*repeat = 0;
if (code_len != 0) { /* code_len == 1..15 */
@ -544,14 +548,14 @@ static BROTLI_INLINE void ProcessSingleCodeLength(uint32_t code_len,
PRECONDITION: code_len == BROTLI_REPEAT_PREVIOUS_CODE_LENGTH or
code_len == BROTLI_REPEAT_ZERO_CODE_LENGTH */
static BROTLI_INLINE void ProcessRepeatedCodeLength(uint32_t code_len,
uint32_t repeat_delta, uint32_t alphabet_size, uint32_t* symbol,
uint32_t* repeat, uint32_t* space, uint32_t* prev_code_len,
uint32_t* repeat_code_len, uint16_t* symbol_lists,
static BROTLI_INLINE void ProcessRepeatedCodeLength(brotli_reg_t code_len,
brotli_reg_t repeat_delta, brotli_reg_t alphabet_size, brotli_reg_t* symbol,
brotli_reg_t* repeat, brotli_reg_t* space, brotli_reg_t* prev_code_len,
brotli_reg_t* repeat_code_len, uint16_t* symbol_lists,
uint16_t* code_length_histo, int* next_symbol) {
uint32_t old_repeat;
uint32_t extra_bits = 3; /* for BROTLI_REPEAT_ZERO_CODE_LENGTH */
uint32_t new_len = 0; /* for BROTLI_REPEAT_ZERO_CODE_LENGTH */
brotli_reg_t old_repeat;
brotli_reg_t extra_bits = 3; /* for BROTLI_REPEAT_ZERO_CODE_LENGTH */
brotli_reg_t new_len = 0; /* for BROTLI_REPEAT_ZERO_CODE_LENGTH */
if (code_len == BROTLI_REPEAT_PREVIOUS_CODE_LENGTH) {
new_len = *prev_code_len;
extra_bits = 2;
@ -576,7 +580,7 @@ static BROTLI_INLINE void ProcessRepeatedCodeLength(uint32_t code_len,
BROTLI_LOG(("[ReadHuffmanCode] code_length[%d..%d] = %d\n",
(int)*symbol, (int)(*symbol + repeat_delta - 1), (int)*repeat_code_len));
if (*repeat_code_len != 0) {
unsigned last = *symbol + repeat_delta;
brotli_reg_t last = *symbol + repeat_delta;
int next = next_symbol[*repeat_code_len];
do {
symbol_lists[next] = (uint16_t)*symbol;
@ -593,14 +597,14 @@ static BROTLI_INLINE void ProcessRepeatedCodeLength(uint32_t code_len,
/* Reads and decodes symbol codelengths. */
static BrotliDecoderErrorCode ReadSymbolCodeLengths(
uint32_t alphabet_size, BrotliDecoderState* s) {
brotli_reg_t alphabet_size, BrotliDecoderState* s) {
BrotliBitReader* br = &s->br;
BrotliMetablockHeaderArena* h = &s->arena.header;
uint32_t symbol = h->symbol;
uint32_t repeat = h->repeat;
uint32_t space = h->space;
uint32_t prev_code_len = h->prev_code_len;
uint32_t repeat_code_len = h->repeat_code_len;
brotli_reg_t symbol = h->symbol;
brotli_reg_t repeat = h->repeat;
brotli_reg_t space = h->space;
brotli_reg_t prev_code_len = h->prev_code_len;
brotli_reg_t repeat_code_len = h->repeat_code_len;
uint16_t* symbol_lists = h->symbol_lists;
uint16_t* code_length_histo = h->code_length_histo;
int* next_symbol = h->next_symbol;
@ -609,9 +613,9 @@ static BrotliDecoderErrorCode ReadSymbolCodeLengths(
}
while (symbol < alphabet_size && space > 0) {
const HuffmanCode* p = h->table;
uint32_t code_len;
brotli_reg_t code_len;
BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(p);
if (!BrotliCheckInputAmount(br, BROTLI_SHORT_FILL_BIT_WINDOW_READ)) {
if (!BrotliCheckInputAmount(br)) {
h->symbol = symbol;
h->repeat = repeat;
h->prev_code_len = prev_code_len;
@ -628,10 +632,10 @@ static BrotliDecoderErrorCode ReadSymbolCodeLengths(
ProcessSingleCodeLength(code_len, &symbol, &repeat, &space,
&prev_code_len, symbol_lists, code_length_histo, next_symbol);
} else { /* code_len == 16..17, extra_bits == 2..3 */
uint32_t extra_bits =
brotli_reg_t extra_bits =
(code_len == BROTLI_REPEAT_PREVIOUS_CODE_LENGTH) ? 2 : 3;
uint32_t repeat_delta =
(uint32_t)BrotliGetBitsUnmasked(br) & BitMask(extra_bits);
brotli_reg_t repeat_delta =
BrotliGetBitsUnmasked(br) & BitMask(extra_bits);
BrotliDropBits(br, extra_bits);
ProcessRepeatedCodeLength(code_len, repeat_delta, alphabet_size,
&symbol, &repeat, &space, &prev_code_len, &repeat_code_len,
@ -643,15 +647,15 @@ static BrotliDecoderErrorCode ReadSymbolCodeLengths(
}
static BrotliDecoderErrorCode SafeReadSymbolCodeLengths(
uint32_t alphabet_size, BrotliDecoderState* s) {
brotli_reg_t alphabet_size, BrotliDecoderState* s) {
BrotliBitReader* br = &s->br;
BrotliMetablockHeaderArena* h = &s->arena.header;
BROTLI_BOOL get_byte = BROTLI_FALSE;
while (h->symbol < alphabet_size && h->space > 0) {
const HuffmanCode* p = h->table;
uint32_t code_len;
uint32_t available_bits;
uint32_t bits = 0;
brotli_reg_t code_len;
brotli_reg_t available_bits;
brotli_reg_t bits = 0;
BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(p);
if (get_byte && !BrotliPullByte(br)) return BROTLI_DECODER_NEEDS_MORE_INPUT;
get_byte = BROTLI_FALSE;
@ -672,8 +676,8 @@ static BrotliDecoderErrorCode SafeReadSymbolCodeLengths(
&h->prev_code_len, h->symbol_lists, h->code_length_histo,
h->next_symbol);
} else { /* code_len == 16..17, extra_bits == 2..3 */
uint32_t extra_bits = code_len - 14U;
uint32_t repeat_delta = (bits >> BROTLI_HC_FAST_LOAD_BITS(p)) &
brotli_reg_t extra_bits = code_len - 14U;
brotli_reg_t repeat_delta = (bits >> BROTLI_HC_FAST_LOAD_BITS(p)) &
BitMask(extra_bits);
if (available_bits < BROTLI_HC_FAST_LOAD_BITS(p) + extra_bits) {
get_byte = BROTLI_TRUE;
@ -694,15 +698,15 @@ static BrotliDecoderErrorCode SafeReadSymbolCodeLengths(
static BrotliDecoderErrorCode ReadCodeLengthCodeLengths(BrotliDecoderState* s) {
BrotliBitReader* br = &s->br;
BrotliMetablockHeaderArena* h = &s->arena.header;
uint32_t num_codes = h->repeat;
unsigned space = h->space;
uint32_t i = h->sub_loop_counter;
brotli_reg_t num_codes = h->repeat;
brotli_reg_t space = h->space;
brotli_reg_t i = h->sub_loop_counter;
for (; i < BROTLI_CODE_LENGTH_CODES; ++i) {
const uint8_t code_len_idx = kCodeLengthCodeOrder[i];
uint32_t ix;
uint32_t v;
brotli_reg_t ix;
brotli_reg_t v;
if (BROTLI_PREDICT_FALSE(!BrotliSafeGetBits(br, 4, &ix))) {
uint32_t available_bits = BrotliGetAvailableBits(br);
brotli_reg_t available_bits = BrotliGetAvailableBits(br);
if (available_bits != 0) {
ix = BrotliGetBitsUnmasked(br) & 0xF;
} else {
@ -747,10 +751,10 @@ static BrotliDecoderErrorCode ReadCodeLengthCodeLengths(BrotliDecoderState* s) {
encoded with predefined entropy code. 32 - 74 bits are used.
B.2) Decoded table is used to decode code lengths of symbols in resulting
Huffman table. In worst case 3520 bits are read. */
static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size_max,
uint32_t alphabet_size_limit,
static BrotliDecoderErrorCode ReadHuffmanCode(brotli_reg_t alphabet_size_max,
brotli_reg_t alphabet_size_limit,
HuffmanCode* table,
uint32_t* opt_table_size,
brotli_reg_t* opt_table_size,
BrotliDecoderState* s) {
BrotliBitReader* br = &s->br;
BrotliMetablockHeaderArena* h = &s->arena.header;
@ -796,9 +800,9 @@ static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size_max,
/* Fall through. */
case BROTLI_STATE_HUFFMAN_SIMPLE_BUILD: {
uint32_t table_size;
brotli_reg_t table_size;
if (h->symbol == 3) {
uint32_t bits;
brotli_reg_t bits;
if (!BrotliSafeReadBits(br, 1, &bits)) {
h->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_BUILD;
return BROTLI_DECODER_NEEDS_MORE_INPUT;
@ -806,8 +810,9 @@ static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size_max,
h->symbol += bits;
}
BROTLI_LOG_UINT(h->symbol);
table_size = BrotliBuildSimpleHuffmanTable(
table, HUFFMAN_TABLE_BITS, h->symbols_lists_array, h->symbol);
table_size = BrotliBuildSimpleHuffmanTable(table, HUFFMAN_TABLE_BITS,
h->symbols_lists_array,
(uint32_t)h->symbol);
if (opt_table_size) {
*opt_table_size = table_size;
}
@ -817,7 +822,7 @@ static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size_max,
/* Decode Huffman-coded code lengths. */
case BROTLI_STATE_HUFFMAN_COMPLEX: {
uint32_t i;
brotli_reg_t i;
BrotliDecoderErrorCode result = ReadCodeLengthCodeLengths(s);
if (result != BROTLI_DECODER_SUCCESS) {
return result;
@ -841,7 +846,7 @@ static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size_max,
/* Fall through. */
case BROTLI_STATE_HUFFMAN_LENGTH_SYMBOLS: {
uint32_t table_size;
brotli_reg_t table_size;
BrotliDecoderErrorCode result = ReadSymbolCodeLengths(
alphabet_size_limit, s);
if (result == BROTLI_DECODER_NEEDS_MORE_INPUT) {
@ -872,10 +877,10 @@ static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size_max,
}
/* Decodes a block length by reading 3..39 bits. */
static BROTLI_INLINE uint32_t ReadBlockLength(const HuffmanCode* table,
BrotliBitReader* br) {
uint32_t code;
uint32_t nbits;
static BROTLI_INLINE brotli_reg_t ReadBlockLength(const HuffmanCode* table,
BrotliBitReader* br) {
brotli_reg_t code;
brotli_reg_t nbits;
code = ReadSymbol(table, br);
nbits = _kBrotliPrefixCodeRanges[code].nbits; /* nbits == 2..24 */
return _kBrotliPrefixCodeRanges[code].offset + BrotliReadBits24(br, nbits);
@ -884,9 +889,9 @@ static BROTLI_INLINE uint32_t ReadBlockLength(const HuffmanCode* table,
/* WARNING: if state is not BROTLI_STATE_READ_BLOCK_LENGTH_NONE, then
reading can't be continued with ReadBlockLength. */
static BROTLI_INLINE BROTLI_BOOL SafeReadBlockLength(
BrotliDecoderState* s, uint32_t* result, const HuffmanCode* table,
BrotliDecoderState* s, brotli_reg_t* result, const HuffmanCode* table,
BrotliBitReader* br) {
uint32_t index;
brotli_reg_t index;
if (s->substate_read_block_length == BROTLI_STATE_READ_BLOCK_LENGTH_NONE) {
if (!SafeReadSymbol(table, br, &index)) {
return BROTLI_FALSE;
@ -895,9 +900,9 @@ static BROTLI_INLINE BROTLI_BOOL SafeReadBlockLength(
index = s->block_length_index;
}
{
uint32_t bits;
uint32_t nbits = _kBrotliPrefixCodeRanges[index].nbits;
uint32_t offset = _kBrotliPrefixCodeRanges[index].offset;
brotli_reg_t bits;
brotli_reg_t nbits = _kBrotliPrefixCodeRanges[index].nbits;
brotli_reg_t offset = _kBrotliPrefixCodeRanges[index].offset;
if (!BrotliSafeReadBits(br, nbits, &bits)) {
s->block_length_index = index;
s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_SUFFIX;
@ -924,10 +929,10 @@ static BROTLI_INLINE BROTLI_BOOL SafeReadBlockLength(
Most of input values are 0 and 1. To reduce number of branches, we replace
inner for loop with do-while. */
static BROTLI_NOINLINE void InverseMoveToFrontTransform(
uint8_t* v, uint32_t v_len, BrotliDecoderState* state) {
uint8_t* v, brotli_reg_t v_len, BrotliDecoderState* state) {
/* Reinitialize elements that could have been changed. */
uint32_t i = 1;
uint32_t upper_bound = state->mtf_upper_bound;
brotli_reg_t i = 1;
brotli_reg_t upper_bound = state->mtf_upper_bound;
uint32_t* mtf = &state->mtf[1]; /* Make mtf[-1] addressable. */
uint8_t* mtf_u8 = (uint8_t*)mtf;
/* Load endian-aware constant. */
@ -970,7 +975,7 @@ static BrotliDecoderErrorCode HuffmanTreeGroupDecode(
h->substate_tree_group = BROTLI_STATE_TREE_GROUP_LOOP;
}
while (h->htree_index < group->num_htrees) {
uint32_t table_size;
brotli_reg_t table_size;
BrotliDecoderErrorCode result = ReadHuffmanCode(group->alphabet_size_max,
group->alphabet_size_limit, h->next, &table_size, s);
if (result != BROTLI_DECODER_SUCCESS) return result;
@ -990,8 +995,8 @@ static BrotliDecoderErrorCode HuffmanTreeGroupDecode(
This table will be used for reading context map items.
3) Read context map items; "0" values could be run-length encoded.
4) Optionally, apply InverseMoveToFront transform to the resulting map. */
static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
uint32_t* num_htrees,
static BrotliDecoderErrorCode DecodeContextMap(brotli_reg_t context_map_size,
brotli_reg_t* num_htrees,
uint8_t** context_map_arg,
BrotliDecoderState* s) {
BrotliBitReader* br = &s->br;
@ -1021,7 +1026,7 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
/* Fall through. */
case BROTLI_STATE_CONTEXT_MAP_READ_PREFIX: {
uint32_t bits;
brotli_reg_t bits;
/* In next stage ReadHuffmanCode uses at least 4 bits, so it is safe
to peek 4 bits ahead. */
if (!BrotliSafeGetBits(br, 5, &bits)) {
@ -1040,7 +1045,7 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
/* Fall through. */
case BROTLI_STATE_CONTEXT_MAP_HUFFMAN: {
uint32_t alphabet_size = *num_htrees + h->max_run_length_prefix;
brotli_reg_t alphabet_size = *num_htrees + h->max_run_length_prefix;
result = ReadHuffmanCode(alphabet_size, alphabet_size,
h->context_map_table, NULL, s);
if (result != BROTLI_DECODER_SUCCESS) return result;
@ -1050,10 +1055,10 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
/* Fall through. */
case BROTLI_STATE_CONTEXT_MAP_DECODE: {
uint32_t context_index = h->context_index;
uint32_t max_run_length_prefix = h->max_run_length_prefix;
brotli_reg_t context_index = h->context_index;
brotli_reg_t max_run_length_prefix = h->max_run_length_prefix;
uint8_t* context_map = *context_map_arg;
uint32_t code = h->code;
brotli_reg_t code = h->code;
BROTLI_BOOL skip_preamble = (code != 0xFFFF);
while (context_index < context_map_size || skip_preamble) {
if (!skip_preamble) {
@ -1078,7 +1083,7 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
}
/* RLE sub-stage. */
{
uint32_t reps;
brotli_reg_t reps;
if (!BrotliSafeReadBits(br, code, &reps)) {
h->code = code;
h->context_index = context_index;
@ -1099,7 +1104,7 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
/* Fall through. */
case BROTLI_STATE_CONTEXT_MAP_TRANSFORM: {
uint32_t bits;
brotli_reg_t bits;
if (!BrotliSafeReadBits(br, 1, &bits)) {
h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_TRANSFORM;
return BROTLI_DECODER_NEEDS_MORE_INPUT;
@ -1121,14 +1126,14 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
Reads 3..54 bits. */
static BROTLI_INLINE BROTLI_BOOL DecodeBlockTypeAndLength(
int safe, BrotliDecoderState* s, int tree_type) {
uint32_t max_block_type = s->num_block_types[tree_type];
brotli_reg_t max_block_type = s->num_block_types[tree_type];
const HuffmanCode* type_tree = &s->block_type_trees[
tree_type * BROTLI_HUFFMAN_MAX_SIZE_258];
const HuffmanCode* len_tree = &s->block_len_trees[
tree_type * BROTLI_HUFFMAN_MAX_SIZE_26];
BrotliBitReader* br = &s->br;
uint32_t* ringbuffer = &s->block_type_rb[tree_type * 2];
uint32_t block_type;
brotli_reg_t* ringbuffer = &s->block_type_rb[tree_type * 2];
brotli_reg_t block_type;
if (max_block_type <= 1) {
return BROTLI_FALSE;
}
@ -1173,6 +1178,7 @@ static BROTLI_INLINE void DetectTrivialLiteralBlockTypes(
size_t sample = s->context_map[offset];
size_t j;
for (j = 0; j < (1u << BROTLI_LITERAL_CONTEXT_BITS);) {
/* NOLINTNEXTLINE(bugprone-macro-repeated-side-effects) */
BROTLI_REPEAT_4({ error |= s->context_map[offset + j++] ^ sample; })
}
if (error == 0) {
@ -1184,8 +1190,8 @@ static BROTLI_INLINE void DetectTrivialLiteralBlockTypes(
static BROTLI_INLINE void PrepareLiteralDecoding(BrotliDecoderState* s) {
uint8_t context_mode;
size_t trivial;
uint32_t block_type = s->block_type_rb[1];
uint32_t context_offset = block_type << BROTLI_LITERAL_CONTEXT_BITS;
brotli_reg_t block_type = s->block_type_rb[1];
brotli_reg_t context_offset = block_type << BROTLI_LITERAL_CONTEXT_BITS;
s->context_map_slice = s->context_map + context_offset;
trivial = s->trivial_literal_contexts[block_type >> 5];
s->trivial_literal_context = (trivial >> (block_type & 31)) & 1;
@ -1549,8 +1555,8 @@ static int CopyFromCompoundDictionary(BrotliDecoderState* s, int pos) {
BROTLI_BOOL BrotliDecoderAttachDictionary(
BrotliDecoderState* state, BrotliSharedDictionaryType type,
size_t data_size, const uint8_t data[BROTLI_ARRAY_PARAM(data_size)]) {
uint32_t i;
uint32_t num_prefix_before = state->dictionary->num_prefix;
brotli_reg_t i;
brotli_reg_t num_prefix_before = state->dictionary->num_prefix;
if (state->state != BROTLI_STATE_UNINITED) return BROTLI_FALSE;
if (!BrotliSharedDictionaryAttach(state->dictionary, type, data_size, data)) {
return BROTLI_FALSE;
@ -1616,7 +1622,7 @@ static BrotliDecoderErrorCode ReadContextModes(BrotliDecoderState* s) {
int i = s->loop_counter;
while (i < (int)s->num_block_types[0]) {
uint32_t bits;
brotli_reg_t bits;
if (!BrotliSafeReadBits(br, 2, &bits)) {
s->loop_counter = i;
return BROTLI_DECODER_NEEDS_MORE_INPUT;
@ -1656,7 +1662,7 @@ static BROTLI_INLINE void TakeDistanceFromRingBuffer(BrotliDecoderState* s) {
}
static BROTLI_INLINE BROTLI_BOOL SafeReadBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) {
if (n_bits != 0) {
return BrotliSafeReadBits(br, n_bits, val);
} else {
@ -1666,7 +1672,7 @@ static BROTLI_INLINE BROTLI_BOOL SafeReadBits(
}
static BROTLI_INLINE BROTLI_BOOL SafeReadBits32(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) {
if (n_bits != 0) {
return BrotliSafeReadBits32(br, n_bits, val);
} else {
@ -1744,16 +1750,16 @@ static BROTLI_INLINE BROTLI_BOOL SafeReadBits32(
NB: it is possible to have all 64 tables precalculated. */
static void CalculateDistanceLut(BrotliDecoderState* s) {
BrotliMetablockBodyArena* b = &s->arena.body;
uint32_t npostfix = s->distance_postfix_bits;
uint32_t ndirect = s->num_direct_distance_codes;
uint32_t alphabet_size_limit = s->distance_hgroup.alphabet_size_limit;
uint32_t postfix = 1u << npostfix;
uint32_t j;
uint32_t bits = 1;
uint32_t half = 0;
brotli_reg_t npostfix = s->distance_postfix_bits;
brotli_reg_t ndirect = s->num_direct_distance_codes;
brotli_reg_t alphabet_size_limit = s->distance_hgroup.alphabet_size_limit;
brotli_reg_t postfix = 1u << npostfix;
brotli_reg_t j;
brotli_reg_t bits = 1;
brotli_reg_t half = 0;
/* Skip short codes. */
uint32_t i = BROTLI_NUM_DISTANCE_SHORT_CODES;
brotli_reg_t i = BROTLI_NUM_DISTANCE_SHORT_CODES;
/* Fill direct codes. */
for (j = 0; j < ndirect; ++j) {
@ -1764,7 +1770,7 @@ static void CalculateDistanceLut(BrotliDecoderState* s) {
/* Fill regular distance codes. */
while (i < alphabet_size_limit) {
uint32_t base = ndirect + ((((2 + half) << bits) - 4) << npostfix) + 1;
brotli_reg_t base = ndirect + ((((2 + half) << bits) - 4) << npostfix) + 1;
/* Always fill the complete group. */
for (j = 0; j < postfix; ++j) {
b->dist_extra_bits[i] = (uint8_t)bits;
@ -1780,8 +1786,8 @@ static void CalculateDistanceLut(BrotliDecoderState* s) {
static BROTLI_INLINE BROTLI_BOOL ReadDistanceInternal(
int safe, BrotliDecoderState* s, BrotliBitReader* br) {
BrotliMetablockBodyArena* b = &s->arena.body;
uint32_t code;
uint32_t bits;
brotli_reg_t code;
brotli_reg_t bits;
BrotliBitReaderState memento;
HuffmanCode* distance_tree = s->distance_hgroup.htrees[s->dist_htree_index];
if (!safe) {
@ -1827,9 +1833,9 @@ static BROTLI_INLINE BROTLI_BOOL SafeReadDistance(
static BROTLI_INLINE BROTLI_BOOL ReadCommandInternal(
int safe, BrotliDecoderState* s, BrotliBitReader* br, int* insert_length) {
uint32_t cmd_code;
uint32_t insert_len_extra = 0;
uint32_t copy_length;
brotli_reg_t cmd_code;
brotli_reg_t insert_len_extra = 0;
brotli_reg_t copy_length;
CmdLutElement v;
BrotliBitReaderState memento;
if (!safe) {
@ -1874,11 +1880,11 @@ static BROTLI_INLINE BROTLI_BOOL SafeReadCommand(
}
static BROTLI_INLINE BROTLI_BOOL CheckInputAmount(
int safe, BrotliBitReader* const br, size_t num) {
int safe, BrotliBitReader* const br) {
if (safe) {
return BROTLI_TRUE;
}
return BrotliCheckInputAmount(br, num);
return BrotliCheckInputAmount(br);
}
#define BROTLI_SAFE(METHOD) \
@ -1901,7 +1907,7 @@ static BROTLI_INLINE BrotliDecoderErrorCode ProcessCommandsInternal(
BrotliBitReader* br = &s->br;
int compound_dictionary_size = GetCompoundDictionarySize(s);
if (!CheckInputAmount(safe, br, 28)) {
if (!CheckInputAmount(safe, br)) {
result = BROTLI_DECODER_NEEDS_MORE_INPUT;
goto saveStateAndReturn;
}
@ -1926,7 +1932,7 @@ CommandBegin:
if (safe) {
s->state = BROTLI_STATE_COMMAND_BEGIN;
}
if (!CheckInputAmount(safe, br, 28)) { /* 156 bits + 7 bytes */
if (!CheckInputAmount(safe, br)) {
s->state = BROTLI_STATE_COMMAND_BEGIN;
result = BROTLI_DECODER_NEEDS_MORE_INPUT;
goto saveStateAndReturn;
@ -1950,25 +1956,23 @@ CommandInner:
}
/* Read the literals in the command. */
if (s->trivial_literal_context) {
uint32_t bits;
uint32_t value;
brotli_reg_t bits;
brotli_reg_t value;
PreloadSymbol(safe, s->literal_htree, br, &bits, &value);
do {
if (!CheckInputAmount(safe, br, 28)) { /* 162 bits + 7 bytes */
if (!CheckInputAmount(safe, br)) {
s->state = BROTLI_STATE_COMMAND_INNER;
result = BROTLI_DECODER_NEEDS_MORE_INPUT;
goto saveStateAndReturn;
}
if (BROTLI_PREDICT_FALSE(s->block_length[0] == 0)) {
BROTLI_SAFE(DecodeLiteralBlockSwitch(s));
PreloadSymbol(safe, s->literal_htree, br, &bits, &value);
if (!s->trivial_literal_context) goto CommandInner;
goto NextLiteralBlock;
}
if (!safe) {
s->ringbuffer[pos] =
(uint8_t)ReadPreloadedSymbol(s->literal_htree, br, &bits, &value);
} else {
uint32_t literal;
brotli_reg_t literal;
if (!SafeReadSymbol(s->literal_htree, br, &literal)) {
result = BROTLI_DECODER_NEEDS_MORE_INPUT;
goto saveStateAndReturn;
@ -1990,14 +1994,13 @@ CommandInner:
do {
const HuffmanCode* hc;
uint8_t context;
if (!CheckInputAmount(safe, br, 28)) { /* 162 bits + 7 bytes */
if (!CheckInputAmount(safe, br)) {
s->state = BROTLI_STATE_COMMAND_INNER;
result = BROTLI_DECODER_NEEDS_MORE_INPUT;
goto saveStateAndReturn;
}
if (BROTLI_PREDICT_FALSE(s->block_length[0] == 0)) {
BROTLI_SAFE(DecodeLiteralBlockSwitch(s));
if (s->trivial_literal_context) goto CommandInner;
goto NextLiteralBlock;
}
context = BROTLI_CONTEXT(p1, p2, s->context_lookup);
BROTLI_LOG_UINT(context);
@ -2006,7 +2009,7 @@ CommandInner:
if (!safe) {
p1 = (uint8_t)ReadSymbol(hc, br);
} else {
uint32_t literal;
brotli_reg_t literal;
if (!SafeReadSymbol(hc, br, &literal)) {
result = BROTLI_DECODER_NEEDS_MORE_INPUT;
goto saveStateAndReturn;
@ -2087,7 +2090,7 @@ CommandPostDecodeLiterals:
const BrotliDictionary* words = s->dictionary->words[dict_id];
const BrotliTransforms* transforms = s->dictionary->transforms[dict_id];
int offset = (int)words->offsets_by_length[i];
uint32_t shift = words->size_bits_by_length[i];
brotli_reg_t shift = words->size_bits_by_length[i];
int address =
s->distance_code - s->max_distance - 1 - compound_dictionary_size;
int mask = (int)BitMask(shift);
@ -2110,7 +2113,7 @@ CommandPostDecodeLiterals:
if (dict_id2 != dict_id && words2->size_bits_by_length[i] != 0) {
const BrotliTransforms* transforms2 =
s->dictionary->transforms[dict_id2];
uint32_t shift2 = words2->size_bits_by_length[i];
brotli_reg_t shift2 = words2->size_bits_by_length[i];
int num = (int)((1u << shift2) & ~1u) *
(int)transforms2->num_transforms;
if (dist_remaining < num) {
@ -2236,6 +2239,10 @@ CommandPostWrapCopy:
goto CommandBegin;
}
NextLiteralBlock:
BROTLI_SAFE(DecodeLiteralBlockSwitch(s));
goto CommandInner;
saveStateAndReturn:
s->pos = pos;
s->loop_counter = i;
@ -2312,14 +2319,13 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
}
if (!*available_out) next_out = 0;
if (s->buffer_length == 0) { /* Just connect bit reader to input stream. */
br->avail_in = *available_in;
br->next_in = *next_in;
BrotliBitReaderSetInput(br, *next_in, *available_in);
} else {
/* At least one byte of input is required. More than one byte of input may
be required to complete the transaction -> reading more data must be
done in a loop -> do it in a main loop. */
result = BROTLI_DECODER_NEEDS_MORE_INPUT;
br->next_in = &s->buffer.u8[0];
BrotliBitReaderSetInput(br, &s->buffer.u8[0], s->buffer_length);
}
/* State machine */
for (;;) {
@ -2336,23 +2342,23 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
}
}
if (s->buffer_length != 0) { /* Used with internal buffer. */
if (br->avail_in == 0) {
if (br->next_in == br->last_in) {
/* Successfully finished read transaction.
Accumulator contains less than 8 bits, because internal buffer
is expanded byte-by-byte until it is enough to complete read. */
s->buffer_length = 0;
/* Switch to input stream and restart. */
result = BROTLI_DECODER_SUCCESS;
br->avail_in = *available_in;
br->next_in = *next_in;
BrotliBitReaderSetInput(br, *next_in, *available_in);
continue;
} else if (*available_in != 0) {
/* Not enough data in buffer, but can take one more byte from
input stream. */
result = BROTLI_DECODER_SUCCESS;
BROTLI_DCHECK(s->buffer_length < 8);
s->buffer.u8[s->buffer_length] = **next_in;
s->buffer_length++;
br->avail_in = s->buffer_length;
BrotliBitReaderSetInput(br, &s->buffer.u8[0], s->buffer_length);
(*next_in)++;
(*available_in)--;
/* Retry with more data in buffer. */
@ -2363,7 +2369,7 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
} else { /* Input stream doesn't contain enough input. */
/* Copy tail to internal buffer and return. */
*next_in = br->next_in;
*available_in = br->avail_in;
*available_in = BrotliBitReaderGetAvailIn(br);
while (*available_in) {
s->buffer.u8[s->buffer_length] = **next_in;
s->buffer_length++;
@ -2386,7 +2392,7 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
stream it has less than 8 bits in accumulator, so it is safe to
return unused accumulator bits there. */
BrotliBitReaderUnload(br);
*available_in = br->avail_in;
*available_in = BrotliBitReaderGetAvailIn(br);
*next_in = br->next_in;
}
break;
@ -2410,17 +2416,20 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
s->state = BROTLI_STATE_INITIALIZE;
break;
case BROTLI_STATE_LARGE_WINDOW_BITS:
if (!BrotliSafeReadBits(br, 6, &s->window_bits)) {
case BROTLI_STATE_LARGE_WINDOW_BITS: {
brotli_reg_t bits;
if (!BrotliSafeReadBits(br, 6, &bits)) {
result = BROTLI_DECODER_NEEDS_MORE_INPUT;
break;
}
s->window_bits = bits & 63u;
if (s->window_bits < BROTLI_LARGE_MIN_WBITS ||
s->window_bits > BROTLI_LARGE_MAX_WBITS) {
result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS);
break;
}
s->state = BROTLI_STATE_INITIALIZE;
}
/* Fall through. */
case BROTLI_STATE_INITIALIZE:
@ -2518,7 +2527,7 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
/* Fall through. */
case BROTLI_STATE_HUFFMAN_CODE_1: {
uint32_t alphabet_size = s->num_block_types[s->loop_counter] + 2;
brotli_reg_t alphabet_size = s->num_block_types[s->loop_counter] + 2;
int tree_offset = s->loop_counter * BROTLI_HUFFMAN_MAX_SIZE_258;
result = ReadHuffmanCode(alphabet_size, alphabet_size,
&s->block_type_trees[tree_offset], NULL, s);
@ -2528,7 +2537,7 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
/* Fall through. */
case BROTLI_STATE_HUFFMAN_CODE_2: {
uint32_t alphabet_size = BROTLI_NUM_BLOCK_LEN_SYMBOLS;
brotli_reg_t alphabet_size = BROTLI_NUM_BLOCK_LEN_SYMBOLS;
int tree_offset = s->loop_counter * BROTLI_HUFFMAN_MAX_SIZE_26;
result = ReadHuffmanCode(alphabet_size, alphabet_size,
&s->block_len_trees[tree_offset], NULL, s);
@ -2569,7 +2578,7 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
break;
case BROTLI_STATE_METABLOCK_HEADER_2: {
uint32_t bits;
brotli_reg_t bits;
if (!BrotliSafeReadBits(br, 6, &bits)) {
result = BROTLI_DECODER_NEEDS_MORE_INPUT;
break;
@ -2610,15 +2619,16 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
/* Fall through. */
case BROTLI_STATE_CONTEXT_MAP_2: {
uint32_t npostfix = s->distance_postfix_bits;
uint32_t ndirect = s->num_direct_distance_codes;
uint32_t distance_alphabet_size_max = BROTLI_DISTANCE_ALPHABET_SIZE(
brotli_reg_t npostfix = s->distance_postfix_bits;
brotli_reg_t ndirect = s->num_direct_distance_codes;
brotli_reg_t distance_alphabet_size_max = BROTLI_DISTANCE_ALPHABET_SIZE(
npostfix, ndirect, BROTLI_MAX_DISTANCE_BITS);
uint32_t distance_alphabet_size_limit = distance_alphabet_size_max;
brotli_reg_t distance_alphabet_size_limit = distance_alphabet_size_max;
BROTLI_BOOL allocation_success = BROTLI_TRUE;
if (s->large_window) {
BrotliDistanceCodeLimit limit = BrotliCalculateDistanceCodeLimit(
BROTLI_MAX_ALLOWED_DISTANCE, npostfix, ndirect);
BROTLI_MAX_ALLOWED_DISTANCE, (uint32_t)npostfix,
(uint32_t)ndirect);
distance_alphabet_size_max = BROTLI_DISTANCE_ALPHABET_SIZE(
npostfix, ndirect, BROTLI_LARGE_MAX_DISTANCE_BITS);
distance_alphabet_size_limit = limit.max_alphabet_size;
@ -2749,7 +2759,7 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
}
if (s->buffer_length == 0) {
BrotliBitReaderUnload(br);
*available_in = br->avail_in;
*available_in = BrotliBitReaderGetAvailIn(br);
*next_in = br->next_in;
}
s->state = BROTLI_STATE_DONE;
@ -2821,7 +2831,7 @@ BrotliDecoderErrorCode BrotliDecoderGetErrorCode(const BrotliDecoderState* s) {
const char* BrotliDecoderErrorString(BrotliDecoderErrorCode c) {
switch (c) {
#define BROTLI_ERROR_CODE_CASE_(PREFIX, NAME, CODE) \
case BROTLI_DECODER ## PREFIX ## NAME: return #NAME;
case BROTLI_DECODER ## PREFIX ## NAME: return #PREFIX #NAME;
#define BROTLI_NOTHING_
BROTLI_DECODER_ERROR_CODES_LIST(BROTLI_ERROR_CODE_CASE_, BROTLI_NOTHING_)
#undef BROTLI_ERROR_CODE_CASE_
@ -2846,16 +2856,16 @@ void BrotliDecoderSetMetadataCallbacks(
/* Escalate internal functions visibility; for testing purposes only. */
#if defined(BROTLI_TEST)
BROTLI_BOOL SafeReadSymbolForTest(
const HuffmanCode*, BrotliBitReader*, uint32_t*);
const HuffmanCode*, BrotliBitReader*, brotli_reg_t*);
BROTLI_BOOL SafeReadSymbolForTest(
const HuffmanCode* table, BrotliBitReader* br, uint32_t* result) {
const HuffmanCode* table, BrotliBitReader* br, brotli_reg_t* result) {
return SafeReadSymbol(table, br, result);
}
void InverseMoveToFrontTransformForTest(
uint8_t*, uint32_t, BrotliDecoderState*);
uint8_t*, brotli_reg_t, BrotliDecoderState*);
void InverseMoveToFrontTransformForTest(
uint8_t* v, uint32_t l, BrotliDecoderState* s) {
uint8_t* v, brotli_reg_t l, BrotliDecoderState* s) {
InverseMoveToFrontTransform(v, l, s);
}
#endif

10
thirdparty/brotli/dec/state.c vendored
View File

@ -98,9 +98,9 @@ BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s,
void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s) {
s->meta_block_remaining_len = 0;
s->block_length[0] = 1U << 24;
s->block_length[1] = 1U << 24;
s->block_length[2] = 1U << 24;
s->block_length[0] = BROTLI_BLOCK_SIZE_CAP;
s->block_length[1] = BROTLI_BLOCK_SIZE_CAP;
s->block_length[2] = BROTLI_BLOCK_SIZE_CAP;
s->num_block_types[0] = 1;
s->num_block_types[1] = 1;
s->num_block_types[2] = 1;
@ -158,8 +158,8 @@ void BrotliDecoderStateCleanup(BrotliDecoderState* s) {
}
BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(BrotliDecoderState* s,
HuffmanTreeGroup* group, uint32_t alphabet_size_max,
uint32_t alphabet_size_limit, uint32_t ntrees) {
HuffmanTreeGroup* group, brotli_reg_t alphabet_size_max,
brotli_reg_t alphabet_size_limit, brotli_reg_t ntrees) {
/* 376 = 256 (1-st level table) + 4 + 7 + 15 + 31 + 63 (2-nd level mix-tables)
This number is discovered "unlimited" "enough" calculator; it is actually
a wee bigger than required in several cases (especially for alphabets with

71
thirdparty/brotli/dec/state.h vendored
View File

@ -211,15 +211,15 @@ typedef struct BrotliMetablockHeaderArena {
BrotliRunningContextMapState substate_context_map;
BrotliRunningHuffmanState substate_huffman;
uint32_t sub_loop_counter;
brotli_reg_t sub_loop_counter;
uint32_t repeat_code_len;
uint32_t prev_code_len;
brotli_reg_t repeat_code_len;
brotli_reg_t prev_code_len;
/* For ReadHuffmanCode. */
uint32_t symbol;
uint32_t repeat;
uint32_t space;
brotli_reg_t symbol;
brotli_reg_t repeat;
brotli_reg_t space;
/* Huffman table for "histograms". */
HuffmanCode table[32];
@ -233,21 +233,22 @@ typedef struct BrotliMetablockHeaderArena {
uint8_t code_length_code_lengths[BROTLI_CODE_LENGTH_CODES];
/* Population counts for the code lengths. */
uint16_t code_length_histo[16];
/* TODO(eustas): +2 bytes padding */
/* For HuffmanTreeGroupDecode. */
int htree_index;
HuffmanCode* next;
/* For DecodeContextMap. */
uint32_t context_index;
uint32_t max_run_length_prefix;
uint32_t code;
brotli_reg_t context_index;
brotli_reg_t max_run_length_prefix;
brotli_reg_t code;
HuffmanCode context_map_table[BROTLI_HUFFMAN_MAX_SIZE_272];
} BrotliMetablockHeaderArena;
typedef struct BrotliMetablockBodyArena {
uint8_t dist_extra_bits[544];
uint32_t dist_offset[544];
brotli_reg_t dist_offset[544];
} BrotliMetablockBodyArena;
struct BrotliDecoderStateStruct {
@ -268,7 +269,7 @@ struct BrotliDecoderStateStruct {
uint64_t u64;
uint8_t u8[8];
} buffer;
uint32_t buffer_length;
brotli_reg_t buffer_length;
int pos;
int max_backward_distance;
@ -278,6 +279,8 @@ struct BrotliDecoderStateStruct {
int dist_rb_idx;
int dist_rb[4];
int error_code;
int meta_block_remaining_len;
uint8_t* ringbuffer;
uint8_t* ringbuffer_end;
HuffmanCode* htree_command;
@ -298,29 +301,30 @@ struct BrotliDecoderStateStruct {
/* Distance context is actual after command is decoded and before distance is
computed. After distance computation it is used as a temporary variable. */
int distance_context;
int meta_block_remaining_len;
uint32_t block_length_index;
uint32_t block_length[3];
uint32_t num_block_types[3];
uint32_t block_type_rb[6];
uint32_t distance_postfix_bits;
uint32_t num_direct_distance_codes;
uint32_t num_dist_htrees;
brotli_reg_t block_length[3];
brotli_reg_t block_length_index;
brotli_reg_t num_block_types[3];
brotli_reg_t block_type_rb[6];
brotli_reg_t distance_postfix_bits;
brotli_reg_t num_direct_distance_codes;
brotli_reg_t num_dist_htrees;
uint8_t* dist_context_map;
HuffmanCode* literal_htree;
uint8_t dist_htree_index;
int copy_length;
int distance_code;
/* For partial write operations. */
size_t rb_roundtrips; /* how many times we went around the ring-buffer */
size_t partial_pos_out; /* how much output to the user in total */
/* For InverseMoveToFrontTransform. */
uint32_t mtf_upper_bound;
brotli_reg_t mtf_upper_bound;
uint32_t mtf[64 + 1];
int copy_length;
int distance_code;
uint8_t dist_htree_index;
/* TODO(eustas): +3 bytes padding */
/* Less used attributes are at the end of this struct. */
brotli_decoder_metadata_start_func metadata_start_func;
@ -336,18 +340,20 @@ struct BrotliDecoderStateStruct {
BrotliRunningDecodeUint8State substate_decode_uint8;
BrotliRunningReadBlockLengthState substate_read_block_length;
int new_ringbuffer_size;
/* TODO(eustas): +4 bytes padding */
unsigned int is_last_metablock : 1;
unsigned int is_uncompressed : 1;
unsigned int is_metadata : 1;
unsigned int should_wrap_ringbuffer : 1;
unsigned int canny_ringbuffer_allocation : 1;
unsigned int large_window : 1;
unsigned int window_bits : 6;
unsigned int size_nibbles : 8;
uint32_t window_bits;
/* TODO(eustas): +12 bits padding */
int new_ringbuffer_size;
uint32_t num_literal_htrees;
brotli_reg_t num_literal_htrees;
uint8_t* context_map;
uint8_t* context_modes;
@ -372,8 +378,9 @@ BROTLI_INTERNAL void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s);
BROTLI_INTERNAL void BrotliDecoderStateCleanupAfterMetablock(
BrotliDecoderState* s);
BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(
BrotliDecoderState* s, HuffmanTreeGroup* group, uint32_t alphabet_size_max,
uint32_t alphabet_size_limit, uint32_t ntrees);
BrotliDecoderState* s, HuffmanTreeGroup* group,
brotli_reg_t alphabet_size_max, brotli_reg_t alphabet_size_limit,
brotli_reg_t ntrees);
#define BROTLI_DECODER_ALLOC(S, L) S->alloc_func(S->memory_manager_opaque, L)
@ -382,6 +389,10 @@ BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(
X = NULL; \
}
/* Literal/Command/Distance block size maximum; same as maximum metablock size;
used as block size when there is no block switching. */
#define BROTLI_BLOCK_SIZE_CAP (1U << 24)
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

2
thirdparty/brotli/include/brotli/decode.h vendored
View File

@ -357,7 +357,7 @@ BROTLI_DEC_API const char* BrotliDecoderErrorString(BrotliDecoderErrorCode c);
/**
* Gets a decoder library version.
*
* Look at BROTLI_VERSION for more information.
* Look at BROTLI_MAKE_HEX_VERSION for more information.
*/
BROTLI_DEC_API uint32_t BrotliDecoderVersion(void);

2
thirdparty/brotli/include/brotli/encode.h vendored
View File

@ -490,7 +490,7 @@ BROTLI_ENC_EXTRA_API size_t BrotliEncoderGetPreparedDictionarySize(
/**
* Gets an encoder library version.
*
* Look at BROTLI_VERSION for more information.
* Look at BROTLI_MAKE_HEX_VERSION for more information.
*/
BROTLI_ENC_API uint32_t BrotliEncoderVersion(void);

5
thirdparty/brotli/include/brotli/shared_dictionary.h vendored
View File

@ -35,7 +35,10 @@ typedef struct BrotliSharedDictionaryStruct BrotliSharedDictionary;
typedef enum BrotliSharedDictionaryType {
/** Raw LZ77 prefix dictionary. */
BROTLI_SHARED_DICTIONARY_RAW = 0,
/** Serialized shared dictionary. */
/** Serialized shared dictionary.
*
* DO NOT USE: methods accepting this value will fail.
*/
BROTLI_SHARED_DICTIONARY_SERIALIZED = 1
} BrotliSharedDictionaryType;