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opt / alt / tests / alt-php84-brotli_0.5.0-3.el8 / brotli / c / enc /

ðŸ“ ..
ðŸ“ .libs
ðŸ“„ backward_references.c(3.92 KB)
ðŸ“„ backward_references.dep(2.92 KB)
ðŸ“„ backward_references.h(1.25 KB)
ðŸ“„ backward_references.lo(303 B)
ðŸ“„ backward_references_hq.c(29.94 KB)
ðŸ“„ backward_references_hq.dep(3.05 KB)
ðŸ“„ backward_references_hq.h(3.83 KB)
ðŸ“„ backward_references_hq.lo(309 B)
ðŸ“„ backward_references_inc.h(6.36 KB)
ðŸ“„ bit_cost.c(812 B)
ðŸ“„ bit_cost.dep(2.21 KB)
ðŸ“„ bit_cost.h(1.67 KB)
ðŸ“„ bit_cost.lo(281 B)
ðŸ“„ bit_cost_inc.h(4.01 KB)
ðŸ“„ block_encoder_inc.h(1.08 KB)
ðŸ“„ block_splitter.c(6.01 KB)
ðŸ“„ block_splitter.dep(2.31 KB)
ðŸ“„ block_splitter.h(1.63 KB)
ðŸ“„ block_splitter.lo(293 B)
ðŸ“„ block_splitter_inc.h(15.86 KB)
ðŸ“„ brotli_bit_stream.c(48.7 KB)
ðŸ“„ brotli_bit_stream.dep(3.11 KB)
ðŸ“„ brotli_bit_stream.h(4.59 KB)
ðŸ“„ brotli_bit_stream.lo(299 B)
ðŸ“„ cluster.c(1.45 KB)
ðŸ“„ cluster.dep(2.41 KB)
ðŸ“„ cluster.h(1021 B)
ðŸ“„ cluster.lo(279 B)
ðŸ“„ cluster_inc.h(11.14 KB)
ðŸ“„ command.h(6.48 KB)
ðŸ“„ compress_fragment.c(31.53 KB)
ðŸ“„ compress_fragment.dep(2.89 KB)
ðŸ“„ compress_fragment.h(2.75 KB)
ðŸ“„ compress_fragment.lo(299 B)
ðŸ“„ compress_fragment_two_pass.c(23.24 KB)
ðŸ“„ compress_fragment_two_pass.dep(3.07 KB)
ðŸ“„ compress_fragment_two_pass.h(2.34 KB)
ðŸ“„ compress_fragment_two_pass.lo(317 B)
ðŸ“„ context.h(7.27 KB)
ðŸ“„ dictionary_hash.c(86.83 KB)
ðŸ“„ dictionary_hash.dep(344 B)
ðŸ“„ dictionary_hash.h(583 B)
ðŸ“„ dictionary_hash.lo(295 B)
ðŸ“„ encode.c(65.51 KB)
ðŸ“„ encode.dep(4.74 KB)
ðŸ“„ encode.lo(277 B)
ðŸ“„ entropy_encode.c(14.14 KB)
ðŸ“„ entropy_encode.dep(560 B)
ðŸ“„ entropy_encode.h(3.94 KB)
ðŸ“„ entropy_encode.lo(293 B)
ðŸ“„ entropy_encode_static.h(32.12 KB)
ðŸ“„ fast_log.h(6.96 KB)
ðŸ“„ find_match_length.h(2.47 KB)
ðŸ“„ hash.h(13.56 KB)
ðŸ“„ hash_forgetful_chain_inc.h(9.41 KB)
ðŸ“„ hash_longest_match64_inc.h(10.19 KB)
ðŸ“„ hash_longest_match_inc.h(9.75 KB)
ðŸ“„ hash_longest_match_quickly_inc.h(8.5 KB)
ðŸ“„ hash_to_binary_tree_inc.h(12.58 KB)
ðŸ“„ histogram.c(3.05 KB)
ðŸ“„ histogram.dep(1.82 KB)
ðŸ“„ histogram.h(1.68 KB)
ðŸ“„ histogram.lo(283 B)
ðŸ“„ histogram_inc.h(1.37 KB)
ðŸ“„ literal_cost.c(5.47 KB)
ðŸ“„ literal_cost.dep(618 B)
ðŸ“„ literal_cost.h(880 B)
ðŸ“„ literal_cost.lo(289 B)
ðŸ“„ memory.c(4.96 KB)
ðŸ“„ memory.dep(455 B)
ðŸ“„ memory.h(1.66 KB)
ðŸ“„ memory.lo(277 B)
ðŸ“„ metablock.c(20.3 KB)
ðŸ“„ metablock.dep(2.92 KB)
ðŸ“„ metablock.h(3.67 KB)
ðŸ“„ metablock.lo(283 B)
ðŸ“„ metablock_inc.h(7.34 KB)
ðŸ“„ port.h(5.5 KB)
ðŸ“„ prefix.h(1.93 KB)
ðŸ“„ quality.h(5.62 KB)
ðŸ“„ ringbuffer.h(5.57 KB)
ðŸ“„ static_dict.c(18.14 KB)
ðŸ“„ static_dict.dep(796 B)
ðŸ“„ static_dict.h(1.2 KB)
ðŸ“„ static_dict.lo(287 B)
ðŸ“„ static_dict_lut.h(458.65 KB)
ðŸ“„ utf8_util.c(2.21 KB)
ðŸ“„ utf8_util.dep(396 B)
ðŸ“„ utf8_util.h(892 B)
ðŸ“„ utf8_util.lo(283 B)
ðŸ“„ write_bits.h(2.72 KB)

Editing: block_splitter.c

Distributed under MIT license.
   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/

/* Block split point selection utilities. */

#include "./block_splitter.h"

#include <assert.h>
#include <string.h>  /* memcpy, memset */

#include "./bit_cost.h"
#include "./cluster.h"
#include "./command.h"
#include "./fast_log.h"
#include "./histogram.h"
#include "./memory.h"
#include "./port.h"
#include "./quality.h"

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

static const size_t kMaxLiteralHistograms = 100;
static const size_t kMaxCommandHistograms = 50;
static const double kLiteralBlockSwitchCost = 28.1;
static const double kCommandBlockSwitchCost = 13.5;
static const double kDistanceBlockSwitchCost = 14.6;
static const size_t kLiteralStrideLength = 70;
static const size_t kCommandStrideLength = 40;
static const size_t kSymbolsPerLiteralHistogram = 544;
static const size_t kSymbolsPerCommandHistogram = 530;
static const size_t kSymbolsPerDistanceHistogram = 544;
static const size_t kMinLengthForBlockSplitting = 128;
static const size_t kIterMulForRefining = 2;
static const size_t kMinItersForRefining = 100;

static size_t CountLiterals(const Command* cmds, const size_t num_commands) {
  /* Count how many we have. */
  size_t total_length = 0;
  size_t i;
  for (i = 0; i < num_commands; ++i) {
    total_length += cmds[i].insert_len_;
  }
  return total_length;
}

static void CopyLiteralsToByteArray(const Command* cmds,
                                    const size_t num_commands,
                                    const uint8_t* data,
                                    const size_t offset,
                                    const size_t mask,
                                    uint8_t* literals) {
  size_t pos = 0;
  size_t from_pos = offset & mask;
  size_t i;
  for (i = 0; i < num_commands; ++i) {
    size_t insert_len = cmds[i].insert_len_;
    if (from_pos + insert_len > mask) {
      size_t head_size = mask + 1 - from_pos;
      memcpy(literals + pos, data + from_pos, head_size);
      from_pos = 0;
      pos += head_size;
      insert_len -= head_size;
    }
    if (insert_len > 0) {
      memcpy(literals + pos, data + from_pos, insert_len);
      pos += insert_len;
    }
    from_pos = (from_pos + insert_len + CommandCopyLen(&cmds[i])) & mask;
  }
}

static BROTLI_INLINE uint32_t MyRand(uint32_t* seed) {
  /* Initial seed should be 7. In this case, loop length is (1 << 29). */
  *seed *= 16807U;
  return *seed;
}

static BROTLI_INLINE double BitCost(size_t count) {
  return count == 0 ? -2.0 : FastLog2(count);
}

#define HISTOGRAMS_PER_BATCH 64
#define CLUSTERS_PER_BATCH 16

#define FN(X) X ## Literal
#define DataType uint8_t
/* NOLINTNEXTLINE(build/include) */
#include "./block_splitter_inc.h"
#undef DataType
#undef FN

#define FN(X) X ## Command
#define DataType uint16_t
/* NOLINTNEXTLINE(build/include) */
#include "./block_splitter_inc.h"
#undef FN

#define FN(X) X ## Distance
/* NOLINTNEXTLINE(build/include) */
#include "./block_splitter_inc.h"
#undef DataType
#undef FN

void BrotliInitBlockSplit(BlockSplit* self) {
  self->num_types = 0;
  self->num_blocks = 0;
  self->types = 0;
  self->lengths = 0;
  self->types_alloc_size = 0;
  self->lengths_alloc_size = 0;
}

void BrotliDestroyBlockSplit(MemoryManager* m, BlockSplit* self) {
  BROTLI_FREE(m, self->types);
  BROTLI_FREE(m, self->lengths);
}

void BrotliSplitBlock(MemoryManager* m,
                      const Command* cmds,
                      const size_t num_commands,
                      const uint8_t* data,
                      const size_t pos,
                      const size_t mask,
                      const BrotliEncoderParams* params,
                      BlockSplit* literal_split,
                      BlockSplit* insert_and_copy_split,
                      BlockSplit* dist_split) {
  {
    size_t literals_count = CountLiterals(cmds, num_commands);
    uint8_t* literals = BROTLI_ALLOC(m, uint8_t, literals_count);
    if (BROTLI_IS_OOM(m)) return;
    /* Create a continuous array of literals. */
    CopyLiteralsToByteArray(cmds, num_commands, data, pos, mask, literals);
    /* Create the block split on the array of literals.
       Literal histograms have alphabet size 256. */
    SplitByteVectorLiteral(
        m, literals, literals_count,
        kSymbolsPerLiteralHistogram, kMaxLiteralHistograms,
        kLiteralStrideLength, kLiteralBlockSwitchCost, params,
        literal_split);
    if (BROTLI_IS_OOM(m)) return;
    BROTLI_FREE(m, literals);
  }

{
    /* Compute prefix codes for commands. */
    uint16_t* insert_and_copy_codes = BROTLI_ALLOC(m, uint16_t, num_commands);
    size_t i;
    if (BROTLI_IS_OOM(m)) return;
    for (i = 0; i < num_commands; ++i) {
      insert_and_copy_codes[i] = cmds[i].cmd_prefix_;
    }
    /* Create the block split on the array of command prefixes. */
    SplitByteVectorCommand(
        m, insert_and_copy_codes, num_commands,
        kSymbolsPerCommandHistogram, kMaxCommandHistograms,
        kCommandStrideLength, kCommandBlockSwitchCost, params,
        insert_and_copy_split);
    if (BROTLI_IS_OOM(m)) return;
    /* TODO: reuse for distances? */
    BROTLI_FREE(m, insert_and_copy_codes);
  }

{
    /* Create a continuous array of distance prefixes. */
    uint16_t* distance_prefixes = BROTLI_ALLOC(m, uint16_t, num_commands);
    size_t j = 0;
    size_t i;
    if (BROTLI_IS_OOM(m)) return;
    for (i = 0; i < num_commands; ++i) {
      const Command* cmd = &cmds[i];
      if (CommandCopyLen(cmd) && cmd->cmd_prefix_ >= 128) {
        distance_prefixes[j++] = cmd->dist_prefix_;
      }
    }
    /* Create the block split on the array of distance prefixes. */
    SplitByteVectorDistance(
        m, distance_prefixes, j,
        kSymbolsPerDistanceHistogram, kMaxCommandHistograms,
        kCommandStrideLength, kDistanceBlockSwitchCost, params,
        dist_split);
    if (BROTLI_IS_OOM(m)) return;
    BROTLI_FREE(m, distance_prefixes);
  }
}

#if defined(__cplusplus) || defined(c_plusplus)
}  /* extern "C" */
#endif

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