1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/* 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_PREPARED_DICTIONARY_H_
#define BROTLI_ENC_PREPARED_DICTIONARY_H_
#include "../common/platform.h"
#include "../common/constants.h"
#include <brotli/shared_dictionary.h>
#include <brotli/types.h>
#include "memory.h"
static const uint32_t kPreparedDictionaryMagic = 0xDEBCEDE0;
static const uint64_t kPreparedDictionaryHashMul64Long =
BROTLI_MAKE_UINT64_T(0x1FE35A7Bu, 0xD3579BD3u);
typedef struct PreparedDictionary {
uint32_t magic;
uint32_t source_offset;
uint32_t source_size;
uint32_t hash_bits;
uint32_t bucket_bits;
uint32_t slot_bits;
/* --- Dynamic size members --- */
/* uint32_t slot_offsets[1 << slot_bits]; */
/* uint16_t heads[1 << bucket_bits]; */
/* uint32_t items[variable]; */
/* uint8_t source[source_size] */
} PreparedDictionary;
BROTLI_INTERNAL PreparedDictionary* CreatePreparedDictionary(MemoryManager* m,
const uint8_t* source, size_t source_size);
BROTLI_INTERNAL void DestroyPreparedDictionary(MemoryManager* m,
PreparedDictionary* dictionary);
typedef struct CompoundDictionary {
/* LZ77 prefix, compound dictionary */
size_t num_chunks;
size_t total_size;
/* Client instances. */
const PreparedDictionary* chunks[SHARED_BROTLI_MAX_COMPOUND_DICTS + 1];
const uint8_t* chunk_source[SHARED_BROTLI_MAX_COMPOUND_DICTS + 1];
size_t chunk_offsets[SHARED_BROTLI_MAX_COMPOUND_DICTS + 1];
size_t num_prepared_instances_;
/* Owned instances. */
PreparedDictionary* prepared_instances_[SHARED_BROTLI_MAX_COMPOUND_DICTS + 1];
} CompoundDictionary;
BROTLI_INTERNAL BROTLI_BOOL AttachPreparedDictionary(
CompoundDictionary* compound, const PreparedDictionary* dictionary);
#endif /* BROTLI_ENC_PREPARED_DICTIONARY */
|
