xevion/easy7zip
1
0
Fork 0
mirror of https://github.com/Xevion/easy7zip.git synced 2025-12-10 20:07:05 -06:00
Code Issues Packages Projects Releases Wiki Activity

Update Brotli to v1.0.1

Browse Source 
- update README.md to the new versions (LZ4, Brotli)
This commit is contained in:
Tino Reichardt
2017-09-28 09:33:27 +02:00
parent 699a608314
commit a818384b05
39 changed files with 463 additions and 432 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
C/brotli/enc/hash_longest_match_quickly_inc.h
View File

@@ -22,7 +22,7 @@ static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 8; }
the address in. The HashLongestMatch and HashLongestMatchQuickly
classes have separate, different implementations of hashing. */
static uint32_t FN(HashBytes)(const uint8_t* data) {
const uint64_t h = ((BROTLI_UNALIGNED_LOAD64(data) << (64 - 8 * HASH_LEN)) *
const uint64_t h = ((BROTLI_UNALIGNED_LOAD64LE(data) << (64 - 8 * HASH_LEN)) *
kHashMul64);
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
@@ -123,24 +123,24 @@ static BROTLI_INLINE void FN(PrepareDistanceCache)(
Does not look for matches longer than max_length.
Does not look for matches further away than max_backward.
Writes the best match into |out|.
Returns true if match is found, otherwise false. */
static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
|out|->score is updated only if a better match is found. */
static BROTLI_INLINE void FN(FindLongestMatch)(
HasherHandle handle, const BrotliDictionary* dictionary,
const uint16_t* dictionary_hash, 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,
HasherSearchResult* BROTLI_RESTRICT out) {
const size_t gap, HasherSearchResult* BROTLI_RESTRICT out) {
HashLongestMatchQuickly* self = FN(Self)(handle);
const size_t best_len_in = out->len;
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
const uint32_t key = FN(HashBytes)(&data[cur_ix_masked]);
int compare_char = data[cur_ix_masked + best_len_in];
score_t min_score = out->score;
score_t best_score = out->score;
size_t best_len = best_len_in;
size_t cached_backward = (size_t)distance_cache[0];
size_t prev_ix = cur_ix - cached_backward;
BROTLI_BOOL is_match_found = BROTLI_FALSE;
out->len_x_code = 0;
out->len_code_delta = 0;
if (prev_ix < cur_ix) {
prev_ix &= (uint32_t)ring_buffer_mask;
if (compare_char == data[prev_ix + best_len]) {
@@ -148,17 +148,18 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
&data[cur_ix_masked],
max_length);
if (len >= 4) {
best_score = BackwardReferenceScoreUsingLastDistance(len);
best_len = len;
out->len = len;
out->distance = cached_backward;
out->score = best_score;
compare_char = data[cur_ix_masked + best_len];
if (BUCKET_SWEEP == 1) {
self->buckets_[key] = (uint32_t)cur_ix;
return BROTLI_TRUE;
} else {
is_match_found = BROTLI_TRUE;
const score_t score = BackwardReferenceScoreUsingLastDistance(len);
if (best_score < score) {
best_score = score;
best_len = len;
out->len = len;
out->distance = cached_backward;
out->score = best_score;
compare_char = data[cur_ix_masked + best_len];
if (BUCKET_SWEEP == 1) {
self->buckets_[key] = (uint32_t)cur_ix;
return;
}
}
}
}
@@ -172,19 +173,22 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
backward = cur_ix - prev_ix;
prev_ix &= (uint32_t)ring_buffer_mask;
if (compare_char != data[prev_ix + best_len_in]) {
return BROTLI_FALSE;
return;
}
if (BROTLI_PREDICT_FALSE(backward == 0 || backward > max_backward)) {
return BROTLI_FALSE;
return;
}
len = FindMatchLengthWithLimit(&data[prev_ix],
&data[cur_ix_masked],
max_length);
if (len >= 4) {
out->len = len;
out->distance = backward;
out->score = BackwardReferenceScore(len, backward);
return BROTLI_TRUE;
const score_t score = BackwardReferenceScore(len, backward);
if (best_score < score) {
out->len = len;
out->distance = backward;
out->score = score;
return;
}
}
} else {
uint32_t *bucket = self->buckets_ + key;
@@ -212,18 +216,16 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
out->distance = backward;
out->score = score;
compare_char = data[cur_ix_masked + best_len];
is_match_found = BROTLI_TRUE;
}
}
}
}
if (USE_DICTIONARY && !is_match_found) {
is_match_found = SearchInStaticDictionary(dictionary, dictionary_hash,
handle, &data[cur_ix_masked], max_length, max_backward, out,
if (USE_DICTIONARY && min_score == out->score) {
SearchInStaticDictionary(dictionary, dictionary_hash,
handle, &data[cur_ix_masked], max_length, max_backward + gap, out,
BROTLI_TRUE);
}
self->buckets_[key + ((cur_ix >> 3) % BUCKET_SWEEP)] = (uint32_t)cur_ix;
return is_match_found;
}
#undef HASH_MAP_SIZE