text: // Copyright 2012 Google Inc. All Rights Reserved.
  //
  // Use of this source code is governed by a BSD-style license
  // that can be found in the COPYING file in the root of the source
  // tree. An additional intellectual property rights grant can be found
  // in the file PATENTS. All contributing project authors may
  // be found in the AUTHORS file in the root of the source tree.
  // -----------------------------------------------------------------------------
  //
  // Color Cache for WebP Lossless
  //
  // Author: Jyrki Alakuijala (jyrki@google.com)
  
  #include <assert.h>
  #include <stdlib.h>
  #include "./color_cache.h"
  #include "../utils/utils.h"
  
  //------------------------------------------------------------------------------
  // VP8LColorCache.
  
  int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) {
    const int hash_size = 1 << hash_bits;
    assert(cc != NULL);
    assert(hash_bits > 0);
    cc->colors_ = (uint32_t*)WebPSafeCalloc((uint64_t)hash_size,
                                            sizeof(*cc->colors_));
    if (cc->colors_ == NULL) return 0;
    cc->hash_shift_ = 32 - hash_bits;
    return 1;
  }
  
  void VP8LColorCacheClear(VP8LColorCache* const cc) {
    if (cc != NULL) {
      free(cc->colors_);
      cc->colors_ = NULL;
    }
  }
  
  