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Diffstat (limited to 'dviware/dvisvgm/libs/brotli/enc/compound_dictionary.h')
-rw-r--r-- | dviware/dvisvgm/libs/brotli/enc/compound_dictionary.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/dviware/dvisvgm/libs/brotli/enc/compound_dictionary.h b/dviware/dvisvgm/libs/brotli/enc/compound_dictionary.h new file mode 100644 index 0000000000..9c531d5b19 --- /dev/null +++ b/dviware/dvisvgm/libs/brotli/enc/compound_dictionary.h @@ -0,0 +1,74 @@ +/* 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 <brotli/shared_dictionary.h> +#include <brotli/types.h> + +#include "../common/platform.h" +#include "../common/constants.h" +#include "memory.h" + +/* "Fat" prepared dictionary, could be cooked outside of C implementation, + * e.g. on Java side. LZ77 data is copied inside PreparedDictionary struct. */ +static const uint32_t kPreparedDictionaryMagic = 0xDEBCEDE0; + +static const uint32_t kSharedDictionaryMagic = 0xDEBCEDE1; + +static const uint32_t kManagedDictionaryMagic = 0xDEBCEDE2; + +/* "Lean" prepared dictionary. LZ77 data is referenced. It is the responsibility + * of caller of "prepare dictionary" to keep the LZ77 data while prepared + * dictionary is in use. */ +static const uint32_t kLeanPreparedDictionaryMagic = 0xDEBCEDE3; + +static const uint64_t kPreparedDictionaryHashMul64Long = + BROTLI_MAKE_UINT64_T(0x1FE35A7Bu, 0xD3579BD3u); + +typedef struct PreparedDictionary { + uint32_t magic; + uint32_t num_items; + 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]; */ + + /* [maybe] uint8_t* source_ref, depending on magic. */ + /* [maybe] uint8_t source[source_size], depending on magic. */ +} 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 */ |