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?? ..
?? .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: bit_reader.c

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

/* Bit reading helpers */

#include "bit_reader.h"

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

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

const BROTLI_MODEL("small")
brotli_reg_t kBrotliBitMask[33] = {     0x00000000,
    0x00000001, 0x00000003, 0x00000007, 0x0000000F,
    0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF,
    0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF,
    0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF,
    0x0001FFFF, 0x0003FFFF, 0x0007FFFF, 0x000FFFFF,
    0x001FFFFF, 0x003FFFFF, 0x007FFFFF, 0x00FFFFFF,
    0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF,
    0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF
};

void BrotliInitBitReader(BrotliBitReader* const br) {
  br->val_ = 0;
  br->bit_pos_ = 0;
}

BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br) {
  size_t aligned_read_mask = (sizeof(br->val_) >> 1) - 1;
  /* Fixing alignment after unaligned BrotliFillWindow would result accumulator
     overflow. If unalignment is caused by BrotliSafeReadBits, then there is
     enough space in accumulator to fix alignment. */
  if (BROTLI_UNALIGNED_READ_FAST) {
    aligned_read_mask = 0;
  }
  if (BrotliGetAvailableBits(br) == 0) {
    br->val_ = 0;
    if (!BrotliPullByte(br)) {
      return BROTLI_FALSE;
    }
  }

while ((((size_t)br->next_in) & aligned_read_mask) != 0) {
    if (!BrotliPullByte(br)) {
      /* If we consumed all the input, we don't care about the alignment. */
      return BROTLI_TRUE;
    }
  }
  return BROTLI_TRUE;
}

BROTLI_BOOL BrotliSafeReadBits32Slow(BrotliBitReader* const br,
    brotli_reg_t n_bits, brotli_reg_t* val) {
  brotli_reg_t low_val;
  brotli_reg_t high_val;
  BrotliBitReaderState memento;
  BROTLI_DCHECK(n_bits <= 32);
  BROTLI_DCHECK(n_bits > 24);
  BrotliBitReaderSaveState(br, &memento);
  if (!BrotliSafeReadBits(br, 16, &low_val) ||
      !BrotliSafeReadBits(br, n_bits - 16, &high_val)) {
    BrotliBitReaderRestoreState(br, &memento);
    return BROTLI_FALSE;
  }
  *val = low_val | (high_val << 16);
  return BROTLI_TRUE;
}

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

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