chromium/third_party/brotli/enc/encoder_dict.h

/* Copyright 2017 Google Inc. All Rights Reserved.

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

#ifndef BROTLI_ENC_ENCODER_DICT_H_
#define BROTLI_ENC_ENCODER_DICT_H_

#include "../common/dictionary.h"
#include "../common/platform.h"
#include <brotli/shared_dictionary.h>
#include <brotli/types.h>
#include "compound_dictionary.h"
#include "memory.h"
#include "static_dict_lut.h"

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

/*
Dictionary hierarchy for Encoder:
-SharedEncoderDictionary
--CompoundDictionary
---PreparedDictionary [up to 15x]
   = prefix dictionary with precomputed hashes
--ContextualEncoderDictionary
---BrotliEncoderDictionary [up to 64x]
   = for each context, precomputed static dictionary with words + transforms

Dictionary hiearchy from common: similar, but without precomputed hashes
-BrotliSharedDictionary
--BrotliDictionary [up to 64x]
--BrotliTransforms [up to 64x]
--const uint8_t* prefix [up to 15x]: compound dictionaries
*/

BrotliTrieNode;

BrotliTrie;

BROTLI_INTERNAL const BrotliTrieNode* BrotliTrieSub(const BrotliTrie* trie,
    const BrotliTrieNode* node, uint8_t c);
/* Dictionary data (words and transforms) for 1 possible context */
BrotliEncoderDictionary;

/* Dictionary data for all 64 contexts */
ContextualEncoderDictionary;

static const uint32_t kSharedDictionaryMagic = …;
static const uint32_t kManagedDictionaryMagic = …;

SharedEncoderDictionary;

ManagedDictionary;

/* Initializes to the brotli built-in dictionary */
BROTLI_INTERNAL void BrotliInitSharedEncoderDictionary(
    SharedEncoderDictionary* dict);

/* Initializes to shared dictionary that will be parsed from
   encoded_dict. Requires that you keep the encoded_dict buffer
   around, parts of data will point to it. */
BROTLI_INTERNAL BROTLI_BOOL BrotliInitCustomSharedEncoderDictionary(
    MemoryManager* m, const uint8_t* encoded_dict, size_t size,
    int quality, SharedEncoderDictionary* dict);

BROTLI_INTERNAL void BrotliCleanupSharedEncoderDictionary(
    MemoryManager* m, SharedEncoderDictionary* dict);

BROTLI_INTERNAL ManagedDictionary* BrotliCreateManagedDictionary(
    brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);

BROTLI_INTERNAL void BrotliDestroyManagedDictionary(
    ManagedDictionary* dictionary);

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

#endif  /* BROTLI_ENC_ENCODER_DICT_H_ */