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comparison mupdf-source/thirdparty/brotli/c/common/dictionary.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /* Copyright 2013 Google Inc. All Rights Reserved.
2
3 Distributed under MIT license.
4 See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
5 */
6
7 /* Collection of static dictionary words. */
8
9 #ifndef BROTLI_COMMON_DICTIONARY_H_
10 #define BROTLI_COMMON_DICTIONARY_H_
11
12 #include <brotli/port.h>
13 #include <brotli/types.h>
14
15 #if defined(__cplusplus) || defined(c_plusplus)
16 extern "C" {
17 #endif
18
19 typedef struct BrotliDictionary {
20 /**
21 * Number of bits to encode index of dictionary word in a bucket.
22 *
23 * Specification: Appendix A. Static Dictionary Data
24 *
25 * Words in a dictionary are bucketed by length.
26 * @c 0 means that there are no words of a given length.
27 * Dictionary consists of words with length of [4..24] bytes.
28 * Values at [0..3] and [25..31] indices should not be addressed.
29 */
30 uint8_t size_bits_by_length[32];
31
32 /* assert(offset[i + 1] == offset[i] + (bits[i] ? (i << bits[i]) : 0)) */
33 uint32_t offsets_by_length[32];
34
35 /* assert(data_size == offsets_by_length[31]) */
36 size_t data_size;
37
38 /* Data array is not bound, and should obey to size_bits_by_length values.
39 Specified size matches default (RFC 7932) dictionary. Its size is
40 defined by data_size */
41 const uint8_t* data;
42 } BrotliDictionary;
43
44 BROTLI_COMMON_API const BrotliDictionary* BrotliGetDictionary(void);
45
46 /**
47 * Sets dictionary data.
48 *
49 * When dictionary data is already set / present, this method is no-op.
50 *
51 * Dictionary data MUST be provided before BrotliGetDictionary is invoked.
52 * This method is used ONLY in multi-client environment (e.g. C + Java),
53 * to reduce storage by sharing single dictionary between implementations.
54 */
55 BROTLI_COMMON_API void BrotliSetDictionaryData(const uint8_t* data);
56
57 #define BROTLI_MIN_DICTIONARY_WORD_LENGTH 4
58 #define BROTLI_MAX_DICTIONARY_WORD_LENGTH 24
59
60 #if defined(__cplusplus) || defined(c_plusplus)
61 } /* extern "C" */
62 #endif
63
64 #endif /* BROTLI_COMMON_DICTIONARY_H_ */