X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=BaseTools%2FSource%2FC%2FBrotliCompress%2Fenc%2Fhash_longest_match_inc.h;fp=BaseTools%2FSource%2FC%2FBrotliCompress%2Fenc%2Fhash_longest_match_inc.h;h=0000000000000000000000000000000000000000;hp=108a7faaccb1339cdb225b19c53e319556327be9;hb=06033f5abad3815e8d80de22c97ba38a05017262;hpb=58802e02c41bd715a5d3586f4bf2a4b1c46e9274

diff --git a/BaseTools/Source/C/BrotliCompress/enc/hash_longest_match_inc.h b/BaseTools/Source/C/BrotliCompress/enc/hash_longest_match_inc.h
deleted file mode 100644
index 108a7faacc..0000000000
--- a/BaseTools/Source/C/BrotliCompress/enc/hash_longest_match_inc.h
+++ /dev/null
@@ -1,258 +0,0 @@
-/* NOLINT(build/header_guard) */
-/* Copyright 2010 Google Inc. All Rights Reserved.
-
-   Distributed under MIT license.
-   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
-*/
-
-/* template parameters: FN */
-
-/* A (forgetful) hash table to the data seen by the compressor, to
-   help create backward references to previous data.
-
-   This is a hash map of fixed size (bucket_size_) to a ring buffer of
-   fixed size (block_size_). The ring buffer contains the last block_size_
-   index positions of the given hash key in the compressed data. */
-
-#define HashLongestMatch HASHER()
-
-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) {
-  uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kHashMul32;
-  /* The higher bits contain more mixture from the multiplication,
-     so we take our results from there. */
-  return (uint32_t)(h >> shift);
-}
-
-typedef struct HashLongestMatch {
-  /* Number of hash buckets. */
-  size_t bucket_size_;
-  /* Only block_size_ newest backward references are kept,
-     and the older are forgotten. */
-  size_t block_size_;
-  /* Left-shift for computing hash bucket index from hash value. */
-  int hash_shift_;
-  /* Mask for accessing entries in a block (in a ring-buffer manner). */
-  uint32_t block_mask_;
-
-  /* --- Dynamic size members --- */
-
-  /* Number of entries in a particular bucket. */
-  /* uint16_t num[bucket_size]; */
-
-  /* Buckets containing block_size_ of backward references. */
-  /* uint32_t* buckets[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 void FN(Initialize)(
-    HasherHandle handle, const BrotliEncoderParams* params) {
-  HasherCommon* common = GetHasherCommon(handle);
-  HashLongestMatch* self = FN(Self)(handle);
-  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);
-}
-
-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);
-  /* 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) {
-    size_t i;
-    for (i = 0; i < input_size; ++i) {
-      const uint32_t key = FN(HashBytes)(&data[i], self->hash_shift_);
-      num[key] = 0;
-    }
-  } else {
-    memset(num, 0, self->bucket_size_ * sizeof(num[0]));
-  }
-}
-
-static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
-    const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
-    size_t input_size) {
-  size_t bucket_size = (size_t)1 << params->hasher.bucket_bits;
-  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);
-}
-
-/* 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,
-    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];
-}
-
-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) {
-  size_t i;
-  for (i = ix_start; i < ix_end; ++i) {
-    FN(Store)(handle, data, mask, i);
-  }
-}
-
-static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
-    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);
-  }
-}
-
-static BROTLI_INLINE void FN(PrepareDistanceCache)(
-    HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
-  PrepareDistanceCache(distance_cache,
-      GetHasherCommon(handle)->params.num_last_distances_to_check);
-}
-
-/* Find a longest backward match of &data[cur_ix] up to the length of
-   max_length and stores the position cur_ix in the hash table.
-
-   REQUIRES: FN(PrepareDistanceCache) must be invoked for current distance cache
-             values; if this method is invoked repeatedly with the same distance
-             cache values, it is enough to invoke FN(PrepareDistanceCache) once.
-
-   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|.
-   |out|->score is updated only if a better match is found. */
-static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
-    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, 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);
-  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;
-  score_t best_score = out->score;
-  size_t best_len = out->len;
-  size_t i;
-  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) {
-    const size_t backward = (size_t)distance_cache[i];
-    size_t prev_ix = (size_t)(cur_ix - backward);
-    if (prev_ix >= cur_ix) {
-      continue;
-    }
-    if (BROTLI_PREDICT_FALSE(backward > max_backward)) {
-      continue;
-    }
-    prev_ix &= ring_buffer_mask;
-
-    if (cur_ix_masked + best_len > ring_buffer_mask ||
-        prev_ix + best_len > ring_buffer_mask ||
-        data[cur_ix_masked + best_len] != data[prev_ix + best_len]) {
-      continue;
-    }
-    {
-      const size_t len = FindMatchLengthWithLimit(&data[prev_ix],
-                                                  &data[cur_ix_masked],
-                                                  max_length);
-      if (len >= 3 || (len == 2 && i < 2)) {
-        /* Comparing for >= 2 does not change the semantics, but just saves for
-           a few unnecessary binary logarithms in backward reference score,
-           since we are not interested in such short matches. */
-        score_t score = BackwardReferenceScoreUsingLastDistance(len);
-        if (best_score < score) {
-          if (i != 0) score -= BackwardReferencePenaltyUsingLastDistance(i);
-          if (best_score < score) {
-            best_score = score;
-            best_len = len;
-            out->len = best_len;
-            out->distance = backward;
-            out->score = best_score;
-          }
-        }
-      }
-    }
-  }
-  {
-    const uint32_t key =
-        FN(HashBytes)(&data[cur_ix_masked], self->hash_shift_);
-    uint32_t* BROTLI_RESTRICT bucket =
-        &buckets[key << common->params.block_bits];
-    const size_t down =
-        (num[key] > self->block_size_) ? (num[key] - self->block_size_) : 0u;
-    for (i = num[key]; i > down;) {
-      size_t prev_ix = bucket[--i & self->block_mask_];
-      const size_t backward = cur_ix - prev_ix;
-      if (BROTLI_PREDICT_FALSE(backward > max_backward)) {
-        break;
-      }
-      prev_ix &= ring_buffer_mask;
-      if (cur_ix_masked + best_len > ring_buffer_mask ||
-          prev_ix + best_len > ring_buffer_mask ||
-          data[cur_ix_masked + best_len] != data[prev_ix + best_len]) {
-        continue;
-      }
-      {
-        const size_t len = FindMatchLengthWithLimit(&data[prev_ix],
-                                                    &data[cur_ix_masked],
-                                                    max_length);
-        if (len >= 4) {
-          /* Comparing for >= 3 does not change the semantics, but just saves
-             for a few unnecessary binary logarithms in backward reference
-             score, since we are not interested in such short matches. */
-          score_t score = BackwardReferenceScore(len, backward);
-          if (best_score < score) {
-            best_score = score;
-            best_len = len;
-            out->len = best_len;
-            out->distance = backward;
-            out->score = best_score;
-          }
-        }
-      }
-    }
-    bucket[num[key] & self->block_mask_] = (uint32_t)cur_ix;
-    ++num[key];
-  }
-  if (min_score == out->score) {
-    SearchInStaticDictionary(dictionary,
-        handle, &data[cur_ix_masked], max_length, max_backward + gap,
-        max_distance, out, BROTLI_FALSE);
-  }
-}
-
-#undef HashLongestMatch