shared_dictionary_internal.h

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/* Copyright 2017 Google Inc. All Rights Reserved.
 
   Distributed under MIT license.
   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
 
/* (Transparent) Shared Dictionary definition. */
 
#ifndef BROTLI_COMMON_SHARED_DICTIONARY_INTERNAL_H_
#define BROTLI_COMMON_SHARED_DICTIONARY_INTERNAL_H_
 
#include <brotli/shared_dictionary.h>
#include <brotli/types.h>
 
#include "dictionary.h"
#include "transform.h"
 
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
 
struct BrotliSharedDictionaryStruct {
  /* LZ77 prefixes (compound dictionary). */
  uint32_t num_prefix;  /* max SHARED_BROTLI_MAX_COMPOUND_DICTS */
  size_t prefix_size[SHARED_BROTLI_MAX_COMPOUND_DICTS];
  const uint8_t* prefix[SHARED_BROTLI_MAX_COMPOUND_DICTS];
 
  /* If set, the context map is used to select word and transform list from 64
     contexts, if not set, the context map is not used and only words[0] and
     transforms[0] are to be used. */
  BROTLI_BOOL context_based;
 
  uint8_t context_map[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS];
 
  /* Amount of word_list+transform_list combinations. */
  uint8_t num_dictionaries;
 
  /* Must use num_dictionaries values. */
  const BrotliDictionary* words[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS];
 
  /* Must use num_dictionaries values. */
  const BrotliTransforms* transforms[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS];
 
  /* Amount of custom word lists. May be 0 if only Brotli's built-in is used */
  uint8_t num_word_lists;
 
  /* Contents of the custom words lists. Must be NULL if num_word_lists is 0. */
  BrotliDictionary* words_instances;
 
  /* Amount of custom transform lists. May be 0 if only Brotli's built-in is
     used */
  uint8_t num_transform_lists;
 
  /* Contents of the custom transform lists. Must be NULL if num_transform_lists
     is 0. */
  BrotliTransforms* transforms_instances;
 
  /* Concatenated prefix_suffix_maps of the custom transform lists. Must be NULL
     if num_transform_lists is 0. */
  uint16_t* prefix_suffix_maps;
 
  /* Memory management */
  brotli_alloc_func alloc_func;
  brotli_free_func free_func;
  void* memory_manager_opaque;
};
 
typedef struct BrotliSharedDictionaryStruct BrotliSharedDictionaryInternal;
#define BrotliSharedDictionary BrotliSharedDictionaryInternal
 
#if defined(__cplusplus) || defined(c_plusplus)
}  /* extern "C" */
#endif
 
#endif  /* BROTLI_COMMON_SHARED_DICTIONARY_INTERNAL_H_ */