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opt / alt / tests / alt-php83-pecl-brotli_0.18.3-2.el8 / brotli / c / dec /

?? ..
?? .libs
?? bit_reader.c(2.23 KB)
?? bit_reader.dep(519 B)
?? bit_reader.h(14.45 KB)
?? bit_reader.lo(285 B)
?? decode.c(105.25 KB)
?? decode.dep(1.49 KB)
?? decode.lo(277 B)
?? huffman.c(11.67 KB)
?? huffman.dep(510 B)
?? huffman.h(3.98 KB)
?? huffman.lo(279 B)
?? prefix.c(2.47 KB)
?? prefix.dep(648 B)
?? prefix.h(1.22 KB)
?? prefix.lo(277 B)
?? prefix_inc.h(30.21 KB)
?? state.c(5.73 KB)
?? state.dep(861 B)
?? state.h(12.16 KB)
?? state.lo(275 B)
?? static_init.c(1.41 KB)
?? static_init.dep(451 B)
?? static_init.h(840 B)
?? static_init.lo(287 B)

Editing: state.c

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

#include "state.h"

#include "../common/dictionary.h"
#include "../common/platform.h"
#include "huffman.h"

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

#ifdef BROTLI_REPORTING
/* When BROTLI_REPORTING is defined extra reporting module have to be linked. */
void BrotliDecoderOnStart(const BrotliDecoderState* s);
void BrotliDecoderOnFinish(const BrotliDecoderState* s);
#define BROTLI_DECODER_ON_START(s) BrotliDecoderOnStart(s);
#define BROTLI_DECODER_ON_FINISH(s) BrotliDecoderOnFinish(s);
#else
#if !defined(BROTLI_DECODER_ON_START)
#define BROTLI_DECODER_ON_START(s) (void)(s);
#endif
#if !defined(BROTLI_DECODER_ON_FINISH)
#define BROTLI_DECODER_ON_FINISH(s) (void)(s);
#endif
#endif

BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s,
    brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque) {
  BROTLI_DECODER_ON_START(s);
  if (!alloc_func) {
    s->alloc_func = BrotliDefaultAllocFunc;
    s->free_func = BrotliDefaultFreeFunc;
    s->memory_manager_opaque = 0;
  } else {
    s->alloc_func = alloc_func;
    s->free_func = free_func;
    s->memory_manager_opaque = opaque;
  }

s->error_code = 0; /* BROTLI_DECODER_NO_ERROR */

BrotliInitBitReader(&s->br);
  s->state = BROTLI_STATE_UNINITED;
  s->large_window = 0;
  s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE;
  s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_NONE;
  s->substate_decode_uint8 = BROTLI_STATE_DECODE_UINT8_NONE;
  s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_NONE;

s->buffer_length = 0;
  s->loop_counter = 0;
  s->pos = 0;
  s->rb_roundtrips = 0;
  s->partial_pos_out = 0;
  s->used_input = 0;

s->block_type_trees = NULL;
  s->block_len_trees = NULL;
  s->ringbuffer = NULL;
  s->ringbuffer_size = 0;
  s->new_ringbuffer_size = 0;
  s->ringbuffer_mask = 0;

s->context_map = NULL;
  s->context_modes = NULL;
  s->dist_context_map = NULL;
  s->context_map_slice = NULL;
  s->dist_context_map_slice = NULL;

s->literal_hgroup.codes = NULL;
  s->literal_hgroup.htrees = NULL;
  s->insert_copy_hgroup.codes = NULL;
  s->insert_copy_hgroup.htrees = NULL;
  s->distance_hgroup.codes = NULL;
  s->distance_hgroup.htrees = NULL;

s->is_last_metablock = 0;
  s->is_uncompressed = 0;
  s->is_metadata = 0;
  s->should_wrap_ringbuffer = 0;
  s->canny_ringbuffer_allocation = 1;

s->window_bits = 0;
  s->max_distance = 0;
  s->dist_rb[0] = 16;
  s->dist_rb[1] = 15;
  s->dist_rb[2] = 11;
  s->dist_rb[3] = 4;
  s->dist_rb_idx = 0;
  s->block_type_trees = NULL;
  s->block_len_trees = NULL;

s->mtf_upper_bound = 63;

s->compound_dictionary = NULL;
  s->dictionary =
      BrotliSharedDictionaryCreateInstance(alloc_func, free_func, opaque);
  if (!s->dictionary) return BROTLI_FALSE;

s->metadata_start_func = NULL;
  s->metadata_chunk_func = NULL;
  s->metadata_callback_opaque = 0;

return BROTLI_TRUE;
}

void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s) {
  s->meta_block_remaining_len = 0;
  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;
  s->block_type_rb[0] = 1;
  s->block_type_rb[1] = 0;
  s->block_type_rb[2] = 1;
  s->block_type_rb[3] = 0;
  s->block_type_rb[4] = 1;
  s->block_type_rb[5] = 0;
  s->context_map = NULL;
  s->context_modes = NULL;
  s->dist_context_map = NULL;
  s->context_map_slice = NULL;
  s->literal_htree = NULL;
  s->dist_context_map_slice = NULL;
  s->dist_htree_index = 0;
  s->context_lookup = NULL;
  s->literal_hgroup.codes = NULL;
  s->literal_hgroup.htrees = NULL;
  s->insert_copy_hgroup.codes = NULL;
  s->insert_copy_hgroup.htrees = NULL;
  s->distance_hgroup.codes = NULL;
  s->distance_hgroup.htrees = NULL;
}

void BrotliDecoderStateCleanupAfterMetablock(BrotliDecoderState* s) {
  BROTLI_DECODER_FREE(s, s->context_modes);
  BROTLI_DECODER_FREE(s, s->context_map);
  BROTLI_DECODER_FREE(s, s->dist_context_map);
  BROTLI_DECODER_FREE(s, s->literal_hgroup.htrees);
  BROTLI_DECODER_FREE(s, s->insert_copy_hgroup.htrees);
  BROTLI_DECODER_FREE(s, s->distance_hgroup.htrees);
}

void BrotliDecoderStateCleanup(BrotliDecoderState* s) {
  BrotliDecoderStateCleanupAfterMetablock(s);

BROTLI_DECODER_ON_FINISH(s);

BROTLI_DECODER_FREE(s, s->compound_dictionary);
  BrotliSharedDictionaryDestroyInstance(s->dictionary);
  s->dictionary = NULL;
  BROTLI_DECODER_FREE(s, s->ringbuffer);
  BROTLI_DECODER_FREE(s, s->block_type_trees);
}

BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(BrotliDecoderState* s,
    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
     less than 16 symbols). */
  const size_t max_table_size = alphabet_size_limit + 376;
  const size_t code_size = sizeof(HuffmanCode) * ntrees * max_table_size;
  const size_t htree_size = sizeof(HuffmanCode*) * ntrees;
  /* Pointer alignment is, hopefully, wider than sizeof(HuffmanCode). */
  HuffmanCode** p = (HuffmanCode**)BROTLI_DECODER_ALLOC(s,
      code_size + htree_size);
  group->alphabet_size_max = (uint16_t)alphabet_size_max;
  group->alphabet_size_limit = (uint16_t)alphabet_size_limit;
  group->num_htrees = (uint16_t)ntrees;
  group->htrees = p;
  group->codes = p ? (HuffmanCode*)(&p[ntrees]) : NULL;
  return !!p;
}

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

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Editing: state.c

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