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Co-authored-by: Anna Henningsen <[email protected]> Backport-PR-URL: #27681 PR-URL: #24938 Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Jan Krems <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Myles Borins <[email protected]> Reviewed-By: Ali Ijaz Sheikh <[email protected]> Reviewed-By: Daniel Bevenius <[email protected]>
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Copyright (c) 2009, 2010, 2013-2016 by the Brotli Authors. | ||
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Permission is hereby granted, free of charge, to any person obtaining a copy | ||
of this software and associated documentation files (the "Software"), to deal | ||
in the Software without restriction, including without limitation the rights | ||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
copies of the Software, and to permit persons to whom the Software is | ||
furnished to do so, subject to the following conditions: | ||
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The above copyright notice and this permission notice shall be included in | ||
all copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
THE SOFTWARE. |
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{ | ||
'targets': [ | ||
{ | ||
'target_name': 'brotli', | ||
'type': 'static_library', | ||
'include_dirs': ['c/include'], | ||
'conditions': [ | ||
['OS=="linux"', { | ||
'defines': [ | ||
'OS_LINUX' | ||
] | ||
}], | ||
['OS=="freebsd"', { | ||
'defines': [ | ||
'OS_FREEBSD' | ||
] | ||
}], | ||
['OS=="mac"', { | ||
'defines': [ | ||
'OS_MACOSX' | ||
] | ||
}], | ||
], | ||
'direct_dependent_settings': { | ||
'include_dirs': [ 'c/include' ] | ||
}, | ||
'libraries': [ | ||
'-lm', | ||
], | ||
'sources': [ | ||
# Common | ||
'c/common/dictionary.c', | ||
'c/common/transform.c', | ||
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# Decoder | ||
'c/dec/bit_reader.c', | ||
'c/dec/decode.c', | ||
'c/dec/huffman.c', | ||
'c/dec/state.c', | ||
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# Encoder | ||
'c/enc/backward_references.c', | ||
'c/enc/backward_references_hq.c', | ||
'c/enc/bit_cost.c', | ||
'c/enc/block_splitter.c', | ||
'c/enc/brotli_bit_stream.c', | ||
'c/enc/cluster.c', | ||
'c/enc/compress_fragment.c', | ||
'c/enc/compress_fragment_two_pass.c', | ||
'c/enc/dictionary_hash.c', | ||
'c/enc/encode.c', | ||
'c/enc/encoder_dict.c', | ||
'c/enc/entropy_encode.c', | ||
'c/enc/histogram.c', | ||
'c/enc/literal_cost.c', | ||
'c/enc/memory.c', | ||
'c/enc/metablock.c', | ||
'c/enc/static_dict.c', | ||
'c/enc/utf8_util.c' | ||
] | ||
} | ||
] | ||
} |
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/* Copyright 2016 Google Inc. All Rights Reserved. | ||
Distributed under MIT license. | ||
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT | ||
*/ | ||
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#ifndef BROTLI_COMMON_CONSTANTS_H_ | ||
#define BROTLI_COMMON_CONSTANTS_H_ | ||
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/* Specification: 7.3. Encoding of the context map */ | ||
#define BROTLI_CONTEXT_MAP_MAX_RLE 16 | ||
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/* Specification: 2. Compressed representation overview */ | ||
#define BROTLI_MAX_NUMBER_OF_BLOCK_TYPES 256 | ||
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/* Specification: 3.3. Alphabet sizes: insert-and-copy length */ | ||
#define BROTLI_NUM_LITERAL_SYMBOLS 256 | ||
#define BROTLI_NUM_COMMAND_SYMBOLS 704 | ||
#define BROTLI_NUM_BLOCK_LEN_SYMBOLS 26 | ||
#define BROTLI_MAX_CONTEXT_MAP_SYMBOLS (BROTLI_MAX_NUMBER_OF_BLOCK_TYPES + \ | ||
BROTLI_CONTEXT_MAP_MAX_RLE) | ||
#define BROTLI_MAX_BLOCK_TYPE_SYMBOLS (BROTLI_MAX_NUMBER_OF_BLOCK_TYPES + 2) | ||
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/* Specification: 3.5. Complex prefix codes */ | ||
#define BROTLI_REPEAT_PREVIOUS_CODE_LENGTH 16 | ||
#define BROTLI_REPEAT_ZERO_CODE_LENGTH 17 | ||
#define BROTLI_CODE_LENGTH_CODES (BROTLI_REPEAT_ZERO_CODE_LENGTH + 1) | ||
/* "code length of 8 is repeated" */ | ||
#define BROTLI_INITIAL_REPEATED_CODE_LENGTH 8 | ||
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/* "Large Window Brotli" */ | ||
#define BROTLI_LARGE_MAX_DISTANCE_BITS 62U | ||
#define BROTLI_LARGE_MIN_WBITS 10 | ||
#define BROTLI_LARGE_MAX_WBITS 30 | ||
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/* Specification: 4. Encoding of distances */ | ||
#define BROTLI_NUM_DISTANCE_SHORT_CODES 16 | ||
#define BROTLI_MAX_NPOSTFIX 3 | ||
#define BROTLI_MAX_NDIRECT 120 | ||
#define BROTLI_MAX_DISTANCE_BITS 24U | ||
#define BROTLI_DISTANCE_ALPHABET_SIZE(NPOSTFIX, NDIRECT, MAXNBITS) ( \ | ||
BROTLI_NUM_DISTANCE_SHORT_CODES + (NDIRECT) + \ | ||
((MAXNBITS) << ((NPOSTFIX) + 1))) | ||
/* BROTLI_NUM_DISTANCE_SYMBOLS == 1128 */ | ||
#define BROTLI_NUM_DISTANCE_SYMBOLS \ | ||
BROTLI_DISTANCE_ALPHABET_SIZE( \ | ||
BROTLI_MAX_NDIRECT, BROTLI_MAX_NPOSTFIX, BROTLI_LARGE_MAX_DISTANCE_BITS) | ||
#define BROTLI_MAX_DISTANCE 0x3FFFFFC | ||
#define BROTLI_MAX_ALLOWED_DISTANCE 0x7FFFFFFC | ||
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/* 7.1. Context modes and context ID lookup for literals */ | ||
/* "context IDs for literals are in the range of 0..63" */ | ||
#define BROTLI_LITERAL_CONTEXT_BITS 6 | ||
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/* 7.2. Context ID for distances */ | ||
#define BROTLI_DISTANCE_CONTEXT_BITS 2 | ||
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/* 9.1. Format of the Stream Header */ | ||
/* Number of slack bytes for window size. Don't confuse | ||
with BROTLI_NUM_DISTANCE_SHORT_CODES. */ | ||
#define BROTLI_WINDOW_GAP 16 | ||
#define BROTLI_MAX_BACKWARD_LIMIT(W) (((size_t)1 << (W)) - BROTLI_WINDOW_GAP) | ||
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#endif /* BROTLI_COMMON_CONSTANTS_H_ */ |
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