Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/brotli/c/enc/compound_dictionary.h @ 17:dd9cdb856310

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Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
parents b50eed0cc0ef
children
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1 /* Copyright 2017 Google Inc. All Rights Reserved.
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3 Distributed under MIT license.
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4 See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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5 */
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7 #ifndef BROTLI_ENC_PREPARED_DICTIONARY_H_
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8 #define BROTLI_ENC_PREPARED_DICTIONARY_H_
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10 #include <brotli/shared_dictionary.h>
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11 #include <brotli/types.h>
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13 #include "../common/platform.h"
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14 #include "../common/constants.h"
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15 #include "memory.h"
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17 /* "Fat" prepared dictionary, could be cooked outside of C implementation,
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18 * e.g. on Java side. LZ77 data is copied inside PreparedDictionary struct. */
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19 static const uint32_t kPreparedDictionaryMagic = 0xDEBCEDE0;
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21 static const uint32_t kSharedDictionaryMagic = 0xDEBCEDE1;
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23 static const uint32_t kManagedDictionaryMagic = 0xDEBCEDE2;
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25 /* "Lean" prepared dictionary. LZ77 data is referenced. It is the responsibility
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26 * of caller of "prepare dictionary" to keep the LZ77 data while prepared
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27 * dictionary is in use. */
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28 static const uint32_t kLeanPreparedDictionaryMagic = 0xDEBCEDE3;
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30 static const uint64_t kPreparedDictionaryHashMul64Long =
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31 BROTLI_MAKE_UINT64_T(0x1FE35A7Bu, 0xD3579BD3u);
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33 typedef struct PreparedDictionary {
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34 uint32_t magic;
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35 uint32_t num_items;
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36 uint32_t source_size;
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37 uint32_t hash_bits;
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38 uint32_t bucket_bits;
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39 uint32_t slot_bits;
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41 /* --- Dynamic size members --- */
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43 /* uint32_t slot_offsets[1 << slot_bits]; */
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44 /* uint16_t heads[1 << bucket_bits]; */
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45 /* uint32_t items[variable]; */
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47 /* [maybe] uint8_t* source_ref, depending on magic. */
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48 /* [maybe] uint8_t source[source_size], depending on magic. */
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49 } PreparedDictionary;
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51 BROTLI_INTERNAL PreparedDictionary* CreatePreparedDictionary(MemoryManager* m,
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52 const uint8_t* source, size_t source_size);
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54 BROTLI_INTERNAL void DestroyPreparedDictionary(MemoryManager* m,
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55 PreparedDictionary* dictionary);
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57 typedef struct CompoundDictionary {
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58 /* LZ77 prefix, compound dictionary */
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59 size_t num_chunks;
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60 size_t total_size;
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61 /* Client instances. */
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62 const PreparedDictionary* chunks[SHARED_BROTLI_MAX_COMPOUND_DICTS + 1];
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63 const uint8_t* chunk_source[SHARED_BROTLI_MAX_COMPOUND_DICTS + 1];
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64 size_t chunk_offsets[SHARED_BROTLI_MAX_COMPOUND_DICTS + 1];
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66 size_t num_prepared_instances_;
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67 /* Owned instances. */
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68 PreparedDictionary* prepared_instances_[SHARED_BROTLI_MAX_COMPOUND_DICTS + 1];
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69 } CompoundDictionary;
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71 BROTLI_INTERNAL BROTLI_BOOL AttachPreparedDictionary(
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72 CompoundDictionary* compound, const PreparedDictionary* dictionary);
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74 #endif /* BROTLI_ENC_PREPARED_DICTIONARY */