kc3-lang/brotli/dec/bit_reader.c

• Show log

  Commit

• Hash : 801f5f37
  Author :
  Date : 2016-08-22T13:28:22
  

  * rename macros with preceding underscore
  * add Brotli*TakeOutput methods
  * * flushing now doesn't require additional call
  * add Brotli*Version methods
  * moved public headers to 'public' directory
  * removed C++ API
  * do not assume STDC_VERSION is defined
  

Download

• dec/bit_reader.c

• /* Copyright 2013 Google Inc. All Rights Reserved.
  
     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 "../public/types.h"
  #include "./port.h"
  
  #if defined(__cplusplus) || defined(c_plusplus)
  extern "C" {
  #endif
  
  void BrotliInitBitReader(BrotliBitReader* const br) {
    br->val_ = 0;
    br->bit_pos_ = sizeof(br->val_) << 3;
  }
  
  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 aligment. */
    if (!BROTLI_ALIGNED_READ) {
      aligned_read_mask = 0;
    }
    if (BrotliGetAvailableBits(br) == 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;
  }
  
  #if defined(__cplusplus) || defined(c_plusplus)
  }  /* extern "C" */
  #endif
  

Download