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Diffstat (limited to 'dviware/dvisvgm/libs/brotli/enc/hash_longest_match_inc.h')
-rw-r--r--dviware/dvisvgm/libs/brotli/enc/hash_longest_match_inc.h103
1 files changed, 53 insertions, 50 deletions
diff --git a/dviware/dvisvgm/libs/brotli/enc/hash_longest_match_inc.h b/dviware/dvisvgm/libs/brotli/enc/hash_longest_match_inc.h
index 457f5a9ed2..27f4463d7f 100644
--- a/dviware/dvisvgm/libs/brotli/enc/hash_longest_match_inc.h
+++ b/dviware/dvisvgm/libs/brotli/enc/hash_longest_match_inc.h
@@ -20,7 +20,8 @@ static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 4; }
static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 4; }
/* HashBytes is the function that chooses the bucket to place the address in. */
-static uint32_t FN(HashBytes)(const uint8_t* data, const int shift) {
+static uint32_t FN(HashBytes)(
+ const uint8_t* BROTLI_RESTRICT data, const int shift) {
uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kHashMul32;
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
@@ -38,42 +39,46 @@ typedef struct HashLongestMatch {
/* Mask for accessing entries in a block (in a ring-buffer manner). */
uint32_t block_mask_;
+ int block_bits_;
+ int num_last_distances_to_check_;
+
+ /* Shortcuts. */
+ HasherCommon* common_;
+
/* --- Dynamic size members --- */
/* Number of entries in a particular bucket. */
- /* uint16_t num[bucket_size]; */
+ uint16_t* num_; /* uint16_t[bucket_size]; */
/* Buckets containing block_size_ of backward references. */
- /* uint32_t* buckets[bucket_size * block_size]; */
+ uint32_t* buckets_; /* uint32_t[bucket_size * block_size]; */
} HashLongestMatch;
-static BROTLI_INLINE HashLongestMatch* FN(Self)(HasherHandle handle) {
- return (HashLongestMatch*)&(GetHasherCommon(handle)[1]);
-}
-
-static BROTLI_INLINE uint16_t* FN(Num)(HashLongestMatch* self) {
- return (uint16_t*)(&self[1]);
-}
-
-static BROTLI_INLINE uint32_t* FN(Buckets)(HashLongestMatch* self) {
- return (uint32_t*)(&FN(Num)(self)[self->bucket_size_]);
+static BROTLI_INLINE uint16_t* FN(Num)(void* extra) {
+ return (uint16_t*)extra;
}
static void FN(Initialize)(
- HasherHandle handle, const BrotliEncoderParams* params) {
- HasherCommon* common = GetHasherCommon(handle);
- HashLongestMatch* self = FN(Self)(handle);
+ HasherCommon* common, HashLongestMatch* BROTLI_RESTRICT self,
+ const BrotliEncoderParams* params) {
+ self->common_ = common;
+
BROTLI_UNUSED(params);
self->hash_shift_ = 32 - common->params.bucket_bits;
self->bucket_size_ = (size_t)1 << common->params.bucket_bits;
self->block_size_ = (size_t)1 << common->params.block_bits;
self->block_mask_ = (uint32_t)(self->block_size_ - 1);
+ self->num_ = (uint16_t*)common->extra;
+ self->buckets_ = (uint32_t*)(&self->num_[self->bucket_size_]);
+ self->block_bits_ = common->params.block_bits;
+ self->num_last_distances_to_check_ =
+ common->params.num_last_distances_to_check;
}
-static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
- size_t input_size, const uint8_t* data) {
- HashLongestMatch* self = FN(Self)(handle);
- uint16_t* num = FN(Num)(self);
+static void FN(Prepare)(
+ HashLongestMatch* BROTLI_RESTRICT self, BROTLI_BOOL one_shot,
+ size_t input_size, const uint8_t* BROTLI_RESTRICT data) {
+ uint16_t* BROTLI_RESTRICT num = self->num_;
/* Partial preparation is 100 times slower (per socket). */
size_t partial_prepare_threshold = self->bucket_size_ >> 6;
if (one_shot && input_size <= partial_prepare_threshold) {
@@ -94,49 +99,49 @@ static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
size_t block_size = (size_t)1 << params->hasher.block_bits;
BROTLI_UNUSED(one_shot);
BROTLI_UNUSED(input_size);
- return sizeof(HashLongestMatch) + bucket_size * (2 + 4 * block_size);
+ return sizeof(uint16_t) * bucket_size +
+ sizeof(uint32_t) * bucket_size * block_size;
}
/* Look at 4 bytes at &data[ix & mask].
Compute a hash from these, and store the value of ix at that position. */
-static BROTLI_INLINE void FN(Store)(HasherHandle handle, const uint8_t* data,
+static BROTLI_INLINE void FN(Store)(
+ HashLongestMatch* BROTLI_RESTRICT self, const uint8_t* BROTLI_RESTRICT data,
const size_t mask, const size_t ix) {
- HashLongestMatch* self = FN(Self)(handle);
- uint16_t* num = FN(Num)(self);
const uint32_t key = FN(HashBytes)(&data[ix & mask], self->hash_shift_);
- const size_t minor_ix = num[key] & self->block_mask_;
- const size_t offset =
- minor_ix + (key << GetHasherCommon(handle)->params.block_bits);
- FN(Buckets)(self)[offset] = (uint32_t)ix;
- ++num[key];
+ const size_t minor_ix = self->num_[key] & self->block_mask_;
+ const size_t offset = minor_ix + (key << self->block_bits_);
+ self->buckets_[offset] = (uint32_t)ix;
+ ++self->num_[key];
}
-static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
- const uint8_t* data, const size_t mask, const size_t ix_start,
- const size_t ix_end) {
+static BROTLI_INLINE void FN(StoreRange)(HashLongestMatch* BROTLI_RESTRICT self,
+ const uint8_t* BROTLI_RESTRICT data, const size_t mask,
+ const size_t ix_start, const size_t ix_end) {
size_t i;
for (i = ix_start; i < ix_end; ++i) {
- FN(Store)(handle, data, mask, i);
+ FN(Store)(self, data, mask, i);
}
}
-static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
+static BROTLI_INLINE void FN(StitchToPreviousBlock)(
+ HashLongestMatch* BROTLI_RESTRICT self,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask) {
if (num_bytes >= FN(HashTypeLength)() - 1 && position >= 3) {
/* Prepare the hashes for three last bytes of the last write.
These could not be calculated before, since they require knowledge
of both the previous and the current block. */
- FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 3);
- FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 2);
- FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 1);
+ FN(Store)(self, ringbuffer, ringbuffer_mask, position - 3);
+ FN(Store)(self, ringbuffer, ringbuffer_mask, position - 2);
+ FN(Store)(self, ringbuffer, ringbuffer_mask, position - 1);
}
}
static BROTLI_INLINE void FN(PrepareDistanceCache)(
- HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
- PrepareDistanceCache(distance_cache,
- GetHasherCommon(handle)->params.num_last_distances_to_check);
+ HashLongestMatch* BROTLI_RESTRICT self,
+ int* BROTLI_RESTRICT distance_cache) {
+ PrepareDistanceCache(distance_cache, self->num_last_distances_to_check_);
}
/* Find a longest backward match of &data[cur_ix] up to the length of
@@ -150,17 +155,16 @@ static BROTLI_INLINE void FN(PrepareDistanceCache)(
Does not look for matches further away than max_backward.
Writes the best match into |out|.
|out|->score is updated only if a better match is found. */
-static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
+static BROTLI_INLINE void FN(FindLongestMatch)(
+ HashLongestMatch* BROTLI_RESTRICT self,
const BrotliEncoderDictionary* dictionary,
const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
const size_t max_length, const size_t max_backward,
- const size_t gap, const size_t max_distance,
+ const size_t dictionary_distance, const size_t max_distance,
HasherSearchResult* BROTLI_RESTRICT out) {
- HasherCommon* common = GetHasherCommon(handle);
- HashLongestMatch* self = FN(Self)(handle);
- uint16_t* num = FN(Num)(self);
- uint32_t* buckets = FN(Buckets)(self);
+ uint16_t* BROTLI_RESTRICT num = self->num_;
+ uint32_t* BROTLI_RESTRICT buckets = self->buckets_;
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
/* Don't accept a short copy from far away. */
score_t min_score = out->score;
@@ -170,7 +174,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
out->len = 0;
out->len_code_delta = 0;
/* Try last distance first. */
- for (i = 0; i < (size_t)common->params.num_last_distances_to_check; ++i) {
+ for (i = 0; i < (size_t)self->num_last_distances_to_check_; ++i) {
const size_t backward = (size_t)distance_cache[i];
size_t prev_ix = (size_t)(cur_ix - backward);
if (prev_ix >= cur_ix) {
@@ -211,8 +215,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
{
const uint32_t key =
FN(HashBytes)(&data[cur_ix_masked], self->hash_shift_);
- uint32_t* BROTLI_RESTRICT bucket =
- &buckets[key << common->params.block_bits];
+ uint32_t* BROTLI_RESTRICT bucket = &buckets[key << self->block_bits_];
const size_t down =
(num[key] > self->block_size_) ? (num[key] - self->block_size_) : 0u;
for (i = num[key]; i > down;) {
@@ -251,7 +254,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
}
if (min_score == out->score) {
SearchInStaticDictionary(dictionary,
- handle, &data[cur_ix_masked], max_length, max_backward + gap,
+ self->common_, &data[cur_ix_masked], max_length, dictionary_distance,
max_distance, out, BROTLI_FALSE);
}
}