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python-brotlipy
CVE-2020-8927.patch
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File CVE-2020-8927.patch of Package python-brotlipy
From 4c08c515f3c45abde832ce7421794ae6fc14cd21 Mon Sep 17 00:00:00 2001 From: Eugene Kliuchnikov <eustas@chromium.org> Date: Wed, 26 Aug 2020 10:42:53 +0200 Subject: [PATCH] Update * IMPORTANT: decoder: fix overflow when input chunk is >2GiB * simplify max Huffman table size calculation * eliminate symbol duplicates (static arrays in .h files) * minor combing in research/ code --- .travis.yml | 5 +- c/common/constants.c | 15 ++++ c/common/constants.h | 16 ++++ c/common/context.c | 156 +++++++++++++++++++++++++++++++++++++ c/common/context.h | 156 +------------------------------------ c/common/platform.c | 22 ++++++ c/common/platform.h | 11 +-- c/dec/bit_reader.c | 11 +++ c/dec/bit_reader.h | 19 ++--- c/dec/decode.c | 9 ++- c/dec/huffman.h | 9 +-- c/dec/prefix.h | 18 ----- c/dec/state.c | 8 +- c/enc/brotli_bit_stream.c | 21 +---- c/enc/command.c | 28 +++++++ c/enc/command.h | 24 +++--- c/enc/entropy_encode.c | 2 + c/enc/entropy_encode.h | 4 +- c/enc/fast_log.c | 105 +++++++++++++++++++++++++ c/enc/fast_log.h | 99 ++--------------------- research/brotli_decoder.c | 1 + research/draw_histogram.cc | 25 +++--- scripts/.bintray.json | 2 +- scripts/sources.lst | 5 ++ setup.py | 5 ++ 25 files changed, 431 insertions(+), 345 deletions(-) create mode 100644 c/common/constants.c create mode 100644 c/common/context.c create mode 100644 c/common/platform.c create mode 100644 c/enc/command.c create mode 100644 c/enc/fast_log.c Index: brotlipy-0.7.0/libbrotli/common/constants.c =================================================================== --- /dev/null +++ brotlipy-0.7.0/libbrotli/common/constants.c @@ -0,0 +1,15 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "./constants.h" + +const BrotliPrefixCodeRange + _kBrotliPrefixCodeRanges[BROTLI_NUM_BLOCK_LEN_SYMBOLS] = { + {1, 2}, {5, 2}, {9, 2}, {13, 2}, {17, 3}, {25, 3}, + {33, 3}, {41, 3}, {49, 4}, {65, 4}, {81, 4}, {97, 4}, + {113, 5}, {145, 5}, {177, 5}, {209, 5}, {241, 6}, {305, 6}, + {369, 7}, {497, 8}, {753, 9}, {1265, 10}, {2289, 11}, {4337, 12}, + {8433, 13}, {16625, 24}}; Index: brotlipy-0.7.0/libbrotli/common/constants.h =================================================================== --- brotlipy-0.7.0.orig/libbrotli/common/constants.h +++ brotlipy-0.7.0/libbrotli/common/constants.h @@ -6,6 +6,7 @@ #ifndef BROTLI_COMMON_CONSTANTS_H_ #define BROTLI_COMMON_CONSTANTS_H_ +#include <brotli/port.h> /* Specification: 7.3. Encoding of the context map */ #define BROTLI_CONTEXT_MAP_MAX_RLE 16 @@ -39,6 +40,10 @@ (BROTLI_MAX_DISTANCE_BITS << \ (BROTLI_MAX_NPOSTFIX + 1))) + +/* Specification: 4. Encoding of Literal Insertion Lengths and Copy Lengths */ +#define BROTLI_NUM_INS_COPY_CODES 24 + /* 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 @@ -52,4 +57,15 @@ #define BROTLI_WINDOW_GAP 16 #define BROTLI_MAX_BACKWARD_LIMIT(W) (((size_t)1 << (W)) - BROTLI_WINDOW_GAP) +/* Represents the range of values belonging to a prefix code: + [offset, offset + 2^nbits) */ +typedef struct { + uint16_t offset; + uint8_t nbits; +} BrotliPrefixCodeRange; + +/* "Soft-private", it is exported, but not "advertised" as API. */ +BROTLI_COMMON_API extern const BrotliPrefixCodeRange + _kBrotliPrefixCodeRanges[BROTLI_NUM_BLOCK_LEN_SYMBOLS]; + #endif /* BROTLI_COMMON_CONSTANTS_H_ */ Index: brotlipy-0.7.0/libbrotli/common/context.c =================================================================== --- /dev/null +++ brotlipy-0.7.0/libbrotli/common/context.c @@ -0,0 +1,156 @@ +#include "./context.h" + +#include <brotli/types.h> + +/* Common context lookup table for all context modes. */ +const uint8_t _kBrotliContextLookupTable[2048] = { + /* CONTEXT_LSB6, last byte. */ + 0, 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, 61, 62, 63, + 0, 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, 61, 62, 63, + 0, 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, 61, 62, 63, + 0, 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, 61, 62, 63, + + /* CONTEXT_LSB6, second last byte, */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + + /* CONTEXT_MSB6, last byte. */ + 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, + 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, + 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, + 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, + 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, + 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, + 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27, + 28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, + 32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 35, + 36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39, 39, + 40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 43, 43, 43, 43, + 44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47, + 48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51, + 52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, 55, 55, + 56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58, 58, 59, 59, 59, 59, + 60, 60, 60, 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63, 63, + + /* CONTEXT_MSB6, second last byte, */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + + /* CONTEXT_UTF8, last byte. */ + /* ASCII range. */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 0, 4, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 8, 12, 16, 12, 12, 20, 12, 16, 24, 28, 12, 12, 32, 12, 36, 12, + 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 32, 32, 24, 40, 28, 12, + 12, 48, 52, 52, 52, 48, 52, 52, 52, 48, 52, 52, 52, 52, 52, 48, + 52, 52, 52, 52, 52, 48, 52, 52, 52, 52, 52, 24, 12, 28, 12, 12, + 12, 56, 60, 60, 60, 56, 60, 60, 60, 56, 60, 60, 60, 60, 60, 56, + 60, 60, 60, 60, 60, 56, 60, 60, 60, 60, 60, 24, 12, 28, 12, 0, + /* UTF8 continuation byte range. */ + 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, + 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, + 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, + 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, + /* UTF8 lead byte range. */ + 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, + 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, + 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, + 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, + + /* CONTEXT_UTF8 second last byte. */ + /* ASCII range. */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, + 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, + 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 0, + /* UTF8 continuation byte range. */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + /* UTF8 lead byte range. */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + + /* CONTEXT_SIGNED, last byte, same as the above values shifted by 3 bits. */ + 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, + 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, + 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, + 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, + 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, + 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, + 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, + 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, + 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, + 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, + 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, + 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 56, + + /* CONTEXT_SIGNED, second last byte. */ + 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, + 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, + 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, + 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, +}; Index: brotlipy-0.7.0/libbrotli/common/platform.c =================================================================== --- /dev/null +++ brotlipy-0.7.0/libbrotli/common/platform.c @@ -0,0 +1,22 @@ +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include <stdlib.h> + +#include "./platform.h" +#include <brotli/types.h> + +/* Default brotli_alloc_func */ +void* BrotliDefaultAllocFunc(void* opaque, size_t size) { + BROTLI_UNUSED(opaque); + return malloc(size); +} + +/* Default brotli_free_func */ +void BrotliDefaultFreeFunc(void* opaque, void* address) { + BROTLI_UNUSED(opaque); + free(address); +} Index: brotlipy-0.7.0/libbrotli/dec/bit_reader.c =================================================================== --- brotlipy-0.7.0.orig/libbrotli/dec/bit_reader.c +++ brotlipy-0.7.0/libbrotli/dec/bit_reader.c @@ -15,6 +15,17 @@ extern "C" { #endif +const uint32_t kBrotliBitMask[33] = { 0x00000000, + 0x00000001, 0x00000003, 0x00000007, 0x0000000F, + 0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF, + 0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF, + 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF, + 0x0001FFFF, 0x0003FFFF, 0x0007FFFF, 0x000FFFFF, + 0x001FFFFF, 0x003FFFFF, 0x007FFFFF, 0x00FFFFFF, + 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF, + 0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF +}; + void BrotliInitBitReader(BrotliBitReader* const br) { br->val_ = 0; br->bit_pos_ = sizeof(br->val_) << 3; Index: brotlipy-0.7.0/libbrotli/dec/bit_reader.h =================================================================== --- brotlipy-0.7.0.orig/libbrotli/dec/bit_reader.h +++ brotlipy-0.7.0/libbrotli/dec/bit_reader.h @@ -11,6 +11,7 @@ #include <string.h> /* memcpy */ +#include "../common/constants.h" #include <brotli/types.h> #include "./port.h" @@ -20,16 +21,7 @@ extern "C" { #define BROTLI_SHORT_FILL_BIT_WINDOW_READ (sizeof(reg_t) >> 1) -static const uint32_t kBitMask[33] = { 0x0000, - 0x00000001, 0x00000003, 0x00000007, 0x0000000F, - 0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF, - 0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF, - 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF, - 0x0001FFFF, 0x0003FFFF, 0x0007FFFF, 0x000FFFFF, - 0x001FFFFF, 0x003FFFFF, 0x007FFFFF, 0x00FFFFFF, - 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF, - 0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF -}; +BROTLI_INTERNAL extern const uint32_t kBrotliBitMask[33]; static BROTLI_INLINE uint32_t BitMask(uint32_t n) { if (IS_CONSTANT(n) || BROTLI_HAS_UBFX) { @@ -37,7 +29,7 @@ static BROTLI_INLINE uint32_t BitMask(ui "Unsigned Bit Field Extract" UBFX instruction on ARM. */ return ~((0xffffffffU) << n); } else { - return kBitMask[n]; + return kBrotliBitMask[n]; } } @@ -86,8 +78,11 @@ static BROTLI_INLINE uint32_t BrotliGetA } /* Returns amount of unread bytes the bit reader still has buffered from the - BrotliInput, including whole bytes in br->val_. */ + BrotliInput, including whole bytes in br->val_. Result is capped with + maximal ring-buffer size (larger number won't be utilized anyway). */ static BROTLI_INLINE size_t BrotliGetRemainingBytes(BrotliBitReader* br) { + static const size_t kCap = (size_t)1 << BROTLI_LARGE_MAX_WBITS; + if (br->avail_in > kCap) return kCap; return br->avail_in + (BrotliGetAvailableBits(br) >> 3); } Index: brotlipy-0.7.0/libbrotli/dec/decode.c =================================================================== --- brotlipy-0.7.0.orig/libbrotli/dec/decode.c +++ brotlipy-0.7.0/libbrotli/dec/decode.c @@ -808,8 +808,8 @@ static BROTLI_INLINE uint32_t ReadBlockL uint32_t code; uint32_t nbits; code = ReadSymbol(table, br); - nbits = kBlockLengthPrefixCode[code].nbits; /* nbits == 2..24 */ - return kBlockLengthPrefixCode[code].offset + BrotliReadBits(br, nbits); + nbits = _kBrotliPrefixCodeRanges[code].nbits; /* nbits == 2..24 */ + return _kBrotliPrefixCodeRanges[code].offset + BrotliReadBits(br, nbits); } /* WARNING: if state is not BROTLI_STATE_READ_BLOCK_LENGTH_NONE, then @@ -827,13 +827,14 @@ static BROTLI_INLINE BROTLI_BOOL SafeRea } { uint32_t bits; - uint32_t nbits = kBlockLengthPrefixCode[index].nbits; /* nbits == 2..24 */ + uint32_t nbits = _kBrotliPrefixCodeRanges[index].nbits; + uint32_t offset = _kBrotliPrefixCodeRanges[index].offset; if (!BrotliSafeReadBits(br, nbits, &bits)) { s->block_length_index = index; s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_SUFFIX; return BROTLI_FALSE; } - *result = kBlockLengthPrefixCode[index].offset + bits; + *result = offset + bits; s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_NONE; return BROTLI_TRUE; } Index: brotlipy-0.7.0/libbrotli/dec/huffman.h =================================================================== --- brotlipy-0.7.0.orig/libbrotli/dec/huffman.h +++ brotlipy-0.7.0/libbrotli/dec/huffman.h @@ -18,11 +18,6 @@ extern "C" { #define BROTLI_HUFFMAN_MAX_CODE_LENGTH 15 -/* Maximum possible Huffman table size for an alphabet size of (index * 32), - * max code length 15 and root table bits 8. */ -static const uint16_t kMaxHuffmanTableSize[] = { - 256, 402, 436, 468, 500, 534, 566, 598, 630, 662, 694, 726, 758, 790, 822, - 854, 886, 920, 952, 984, 1016, 1048, 1080}; /* BROTLI_NUM_BLOCK_LEN_SYMBOLS == 26 */ #define BROTLI_HUFFMAN_MAX_SIZE_26 396 /* BROTLI_MAX_BLOCK_TYPE_SYMBOLS == 258 */ @@ -44,7 +39,7 @@ BROTLI_INTERNAL void BrotliBuildCodeLeng /* Builds Huffman lookup table assuming code lengths are in symbol order. */ /* Returns size of resulting table. */ BROTLI_INTERNAL uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table, - int root_bits, const uint16_t* const symbol_lists, uint16_t* count_arg); + int root_bits, const uint16_t* const symbol_lists, uint16_t* count); /* Builds a simple Huffman table. The num_symbols parameter is to be */ /* interpreted as follows: 0 means 1 symbol, 1 means 2 symbols, 2 means 3 */ Index: brotlipy-0.7.0/libbrotli/dec/prefix.h =================================================================== --- brotlipy-0.7.0.orig/libbrotli/dec/prefix.h +++ brotlipy-0.7.0/libbrotli/dec/prefix.h @@ -14,24 +14,6 @@ #include "../common/constants.h" #include <brotli/types.h> -/* Represents the range of values belonging to a prefix code: */ -/* [offset, offset + 2^nbits) */ -struct PrefixCodeRange { - uint16_t offset; - uint8_t nbits; -}; - -static const struct PrefixCodeRange - kBlockLengthPrefixCode[BROTLI_NUM_BLOCK_LEN_SYMBOLS] = { - { 1, 2}, { 5, 2}, { 9, 2}, { 13, 2}, - { 17, 3}, { 25, 3}, { 33, 3}, { 41, 3}, - { 49, 4}, { 65, 4}, { 81, 4}, { 97, 4}, - { 113, 5}, { 145, 5}, { 177, 5}, { 209, 5}, - { 241, 6}, { 305, 6}, { 369, 7}, { 497, 8}, - { 753, 9}, { 1265, 10}, {2289, 11}, {4337, 12}, - {8433, 13}, {16625, 24} -}; - typedef struct CmdLutElement { uint8_t insert_len_extra_bits; uint8_t copy_len_extra_bits; Index: brotlipy-0.7.0/libbrotli/dec/state.c =================================================================== --- brotlipy-0.7.0.orig/libbrotli/dec/state.c +++ brotlipy-0.7.0/libbrotli/dec/state.c @@ -151,8 +151,11 @@ void BrotliDecoderStateCleanup(BrotliDec BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(BrotliDecoderState* s, HuffmanTreeGroup* group, uint32_t alphabet_size, uint32_t ntrees) { - /* Pack two allocations into one */ - const size_t max_table_size = kMaxHuffmanTableSize[(alphabet_size + 31) >> 5]; + /* 376 = 256 (1-st level table) + 4 + 7 + 15 + 31 + 63 (2-nd level mix-tables) + This number is discovered "unlimited" "enough" calculator; it is actually + a wee bigger than required in several cases (especially for alphabets with + less than 16 symbols). */ + const size_t max_table_size = alphabet_size + 376; const size_t code_size = sizeof(HuffmanCode) * ntrees * max_table_size; const size_t htree_size = sizeof(HuffmanCode*) * ntrees; /* Pointer alignment is, hopefully, wider than sizeof(HuffmanCode). */ Index: brotlipy-0.7.0/libbrotli/enc/brotli_bit_stream.c =================================================================== --- brotlipy-0.7.0.orig/libbrotli/enc/brotli_bit_stream.c +++ brotlipy-0.7.0/libbrotli/enc/brotli_bit_stream.c @@ -34,33 +34,18 @@ extern "C" { /* SIMPLE_DISTANCE_ALPHABET_SIZE == 64 */ #define SIMPLE_DISTANCE_ALPHABET_BITS 6 -/* Represents the range of values belonging to a prefix code: - [offset, offset + 2^nbits) */ -typedef struct PrefixCodeRange { - uint32_t offset; - uint32_t nbits; -} PrefixCodeRange; - -static const PrefixCodeRange - kBlockLengthPrefixCode[BROTLI_NUM_BLOCK_LEN_SYMBOLS] = { - { 1, 2}, { 5, 2}, { 9, 2}, {13, 2}, {17, 3}, { 25, 3}, { 33, 3}, - {41, 3}, {49, 4}, {65, 4}, {81, 4}, {97, 4}, {113, 5}, {145, 5}, - {177, 5}, { 209, 5}, { 241, 6}, { 305, 6}, { 369, 7}, { 497, 8}, - {753, 9}, {1265, 10}, {2289, 11}, {4337, 12}, {8433, 13}, {16625, 24} -}; - static BROTLI_INLINE uint32_t BlockLengthPrefixCode(uint32_t len) { uint32_t code = (len >= 177) ? (len >= 753 ? 20 : 14) : (len >= 41 ? 7 : 0); while (code < (BROTLI_NUM_BLOCK_LEN_SYMBOLS - 1) && - len >= kBlockLengthPrefixCode[code + 1].offset) ++code; + len >= _kBrotliPrefixCodeRanges[code + 1].offset) ++code; return code; } static BROTLI_INLINE void GetBlockLengthPrefixCode(uint32_t len, size_t* code, uint32_t* n_extra, uint32_t* extra) { *code = BlockLengthPrefixCode(len); - *n_extra = kBlockLengthPrefixCode[*code].nbits; - *extra = len - kBlockLengthPrefixCode[*code].offset; + *n_extra = _kBrotliPrefixCodeRanges[*code].nbits; + *extra = len - _kBrotliPrefixCodeRanges[*code].offset; } typedef struct BlockTypeCodeCalculator { Index: brotlipy-0.7.0/libbrotli/enc/command.c =================================================================== --- /dev/null +++ brotlipy-0.7.0/libbrotli/enc/command.c @@ -0,0 +1,28 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "./command.h" + +#include <brotli/types.h> + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +const uint32_t kBrotliInsBase[BROTLI_NUM_INS_COPY_CODES] = { + 0, 1, 2, 3, 4, 5, 6, 8, 10, 14, 18, 26, + 34, 50, 66, 98, 130, 194, 322, 578, 1090, 2114, 6210, 22594}; +const uint32_t kBrotliInsExtra[BROTLI_NUM_INS_COPY_CODES] = { + 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 8, 9, 10, 12, 14, 24}; +const uint32_t kBrotliCopyBase[BROTLI_NUM_INS_COPY_CODES] = { + 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 18, + 22, 30, 38, 54, 70, 102, 134, 198, 326, 582, 1094, 2118}; +const uint32_t kBrotliCopyExtra[BROTLI_NUM_INS_COPY_CODES] = { + 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 8, 9, 10, 24}; + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif Index: brotlipy-0.7.0/libbrotli/enc/command.h =================================================================== --- brotlipy-0.7.0.orig/libbrotli/enc/command.h +++ brotlipy-0.7.0/libbrotli/enc/command.h @@ -19,14 +19,14 @@ extern "C" { #endif -static uint32_t kInsBase[] = { 0, 1, 2, 3, 4, 5, 6, 8, 10, 14, 18, 26, 34, 50, - 66, 98, 130, 194, 322, 578, 1090, 2114, 6210, 22594 }; -static uint32_t kInsExtra[] = { 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, - 5, 5, 6, 7, 8, 9, 10, 12, 14, 24 }; -static uint32_t kCopyBase[] = { 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 18, 22, 30, - 38, 54, 70, 102, 134, 198, 326, 582, 1094, 2118 }; -static uint32_t kCopyExtra[] = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, - 4, 4, 5, 5, 6, 7, 8, 9, 10, 24 }; +BROTLI_INTERNAL extern const uint32_t + kBrotliInsBase[BROTLI_NUM_INS_COPY_CODES]; +BROTLI_INTERNAL extern const uint32_t + kBrotliInsExtra[BROTLI_NUM_INS_COPY_CODES]; +BROTLI_INTERNAL extern const uint32_t + kBrotliCopyBase[BROTLI_NUM_INS_COPY_CODES]; +BROTLI_INTERNAL extern const uint32_t + kBrotliCopyExtra[BROTLI_NUM_INS_COPY_CODES]; static BROTLI_INLINE uint16_t GetInsertLengthCode(size_t insertlen) { if (insertlen < 6) { @@ -88,19 +88,19 @@ static BROTLI_INLINE void GetLengthCode( } static BROTLI_INLINE uint32_t GetInsertBase(uint16_t inscode) { - return kInsBase[inscode]; + return kBrotliInsBase[inscode]; } static BROTLI_INLINE uint32_t GetInsertExtra(uint16_t inscode) { - return kInsExtra[inscode]; + return kBrotliInsExtra[inscode]; } static BROTLI_INLINE uint32_t GetCopyBase(uint16_t copycode) { - return kCopyBase[copycode]; + return kBrotliCopyBase[copycode]; } static BROTLI_INLINE uint32_t GetCopyExtra(uint16_t copycode) { - return kCopyExtra[copycode]; + return kBrotliCopyExtra[copycode]; } typedef struct Command { Index: brotlipy-0.7.0/libbrotli/enc/entropy_encode.c =================================================================== --- brotlipy-0.7.0.orig/libbrotli/enc/entropy_encode.c +++ brotlipy-0.7.0/libbrotli/enc/entropy_encode.c @@ -18,6 +18,8 @@ extern "C" { #endif +const size_t kBrotliShellGaps[] = {132, 57, 23, 10, 4, 1}; + BROTLI_BOOL BrotliSetDepth( int p0, HuffmanTree* pool, uint8_t* depth, int max_depth) { int stack[16]; Index: brotlipy-0.7.0/libbrotli/enc/entropy_encode.h =================================================================== --- brotlipy-0.7.0.orig/libbrotli/enc/entropy_encode.h +++ brotlipy-0.7.0/libbrotli/enc/entropy_encode.h @@ -76,12 +76,12 @@ BROTLI_INTERNAL void BrotliConvertBitDep size_t len, uint16_t *bits); +BROTLI_INTERNAL extern const size_t kBrotliShellGaps[6]; /* Input size optimized Shell sort. */ typedef BROTLI_BOOL (*HuffmanTreeComparator)( const HuffmanTree*, const HuffmanTree*); static BROTLI_INLINE void SortHuffmanTreeItems(HuffmanTree* items, const size_t n, HuffmanTreeComparator comparator) { - static const size_t gaps[] = {132, 57, 23, 10, 4, 1}; if (n < 13) { /* Insertion sort. */ size_t i; @@ -101,7 +101,7 @@ static BROTLI_INLINE void SortHuffmanTre /* Shell sort. */ int g = n < 57 ? 2 : 0; for (; g < 6; ++g) { - size_t gap = gaps[g]; + size_t gap = kBrotliShellGaps[g]; size_t i; for (i = gap; i < n; ++i) { size_t j = i; Index: brotlipy-0.7.0/libbrotli/enc/fast_log.c =================================================================== --- /dev/null +++ brotlipy-0.7.0/libbrotli/enc/fast_log.c @@ -0,0 +1,105 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "./fast_log.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +/* ", ".join(["%.16ff" % x for x in [0.0]+[log2(x) for x in range(1, 256)]]) */ +const double kBrotliLog2Table[BROTLI_LOG2_TABLE_SIZE] = { + 0.0000000000000000f, 0.0000000000000000f, 1.0000000000000000f, + 1.5849625007211563f, 2.0000000000000000f, 2.3219280948873622f, + 2.5849625007211561f, 2.8073549220576042f, 3.0000000000000000f, + 3.1699250014423126f, 3.3219280948873626f, 3.4594316186372978f, + 3.5849625007211565f, 3.7004397181410922f, 3.8073549220576037f, + 3.9068905956085187f, 4.0000000000000000f, 4.0874628412503400f, + 4.1699250014423122f, 4.2479275134435852f, 4.3219280948873626f, + 4.3923174227787607f, 4.4594316186372973f, 4.5235619560570131f, + 4.5849625007211570f, 4.6438561897747244f, 4.7004397181410926f, + 4.7548875021634691f, 4.8073549220576037f, 4.8579809951275728f, + 4.9068905956085187f, 4.9541963103868758f, 5.0000000000000000f, + 5.0443941193584534f, 5.0874628412503400f, 5.1292830169449664f, + 5.1699250014423122f, 5.2094533656289501f, 5.2479275134435852f, + 5.2854022188622487f, 5.3219280948873626f, 5.3575520046180838f, + 5.3923174227787607f, 5.4262647547020979f, 5.4594316186372973f, + 5.4918530963296748f, 5.5235619560570131f, 5.5545888516776376f, + 5.5849625007211570f, 5.6147098441152083f, 5.6438561897747244f, + 5.6724253419714961f, 5.7004397181410926f, 5.7279204545631996f, + 5.7548875021634691f, 5.7813597135246599f, 5.8073549220576046f, + 5.8328900141647422f, 5.8579809951275719f, 5.8826430493618416f, + 5.9068905956085187f, 5.9307373375628867f, 5.9541963103868758f, + 5.9772799234999168f, 6.0000000000000000f, 6.0223678130284544f, + 6.0443941193584534f, 6.0660891904577721f, 6.0874628412503400f, + 6.1085244567781700f, 6.1292830169449672f, 6.1497471195046822f, + 6.1699250014423122f, 6.1898245588800176f, 6.2094533656289510f, + 6.2288186904958804f, 6.2479275134435861f, 6.2667865406949019f, + 6.2854022188622487f, 6.3037807481771031f, 6.3219280948873617f, + 6.3398500028846252f, 6.3575520046180847f, 6.3750394313469254f, + 6.3923174227787598f, 6.4093909361377026f, 6.4262647547020979f, + 6.4429434958487288f, 6.4594316186372982f, 6.4757334309663976f, + 6.4918530963296748f, 6.5077946401986964f, 6.5235619560570131f, + 6.5391588111080319f, 6.5545888516776376f, 6.5698556083309478f, + 6.5849625007211561f, 6.5999128421871278f, 6.6147098441152092f, + 6.6293566200796095f, 6.6438561897747253f, 6.6582114827517955f, + 6.6724253419714952f, 6.6865005271832185f, 6.7004397181410917f, + 6.7142455176661224f, 6.7279204545631988f, 6.7414669864011465f, + 6.7548875021634691f, 6.7681843247769260f, 6.7813597135246599f, + 6.7944158663501062f, 6.8073549220576037f, 6.8201789624151887f, + 6.8328900141647422f, 6.8454900509443757f, 6.8579809951275719f, + 6.8703647195834048f, 6.8826430493618416f, 6.8948177633079437f, + 6.9068905956085187f, 6.9188632372745955f, 6.9307373375628867f, + 6.9425145053392399f, 6.9541963103868758f, 6.9657842846620879f, + 6.9772799234999168f, 6.9886846867721664f, 7.0000000000000000f, + 7.0112272554232540f, 7.0223678130284544f, 7.0334230015374501f, + 7.0443941193584534f, 7.0552824355011898f, 7.0660891904577721f, + 7.0768155970508317f, 7.0874628412503400f, 7.0980320829605272f, + 7.1085244567781700f, 7.1189410727235076f, 7.1292830169449664f, + 7.1395513523987937f, 7.1497471195046822f, 7.1598713367783891f, + 7.1699250014423130f, 7.1799090900149345f, 7.1898245588800176f, + 7.1996723448363644f, 7.2094533656289492f, 7.2191685204621621f, + 7.2288186904958804f, 7.2384047393250794f, 7.2479275134435861f, + 7.2573878426926521f, 7.2667865406949019f, 7.2761244052742384f, + 7.2854022188622487f, 7.2946207488916270f, 7.3037807481771031f, + 7.3128829552843557f, 7.3219280948873617f, 7.3309168781146177f, + 7.3398500028846243f, 7.3487281542310781f, 7.3575520046180847f, + 7.3663222142458151f, 7.3750394313469254f, 7.3837042924740528f, + 7.3923174227787607f, 7.4008794362821844f, 7.4093909361377026f, + 7.4178525148858991f, 7.4262647547020979f, 7.4346282276367255f, + 7.4429434958487288f, 7.4512111118323299f, 7.4594316186372973f, + 7.4676055500829976f, 7.4757334309663976f, 7.4838157772642564f, + 7.4918530963296748f, 7.4998458870832057f, 7.5077946401986964f, + 7.5156998382840436f, 7.5235619560570131f, 7.5313814605163119f, + 7.5391588111080319f, 7.5468944598876373f, 7.5545888516776376f, + 7.5622424242210728f, 7.5698556083309478f, 7.5774288280357487f, + 7.5849625007211561f, 7.5924570372680806f, 7.5999128421871278f, + 7.6073303137496113f, 7.6147098441152075f, 7.6220518194563764f, + 7.6293566200796095f, 7.6366246205436488f, 7.6438561897747244f, + 7.6510516911789290f, 7.6582114827517955f, 7.6653359171851765f, + 7.6724253419714952f, 7.6794800995054464f, 7.6865005271832185f, + 7.6934869574993252f, 7.7004397181410926f, 7.7073591320808825f, + 7.7142455176661224f, 7.7210991887071856f, 7.7279204545631996f, + 7.7347096202258392f, 7.7414669864011465f, 7.7481928495894596f, + 7.7548875021634691f, 7.7615512324444795f, 7.7681843247769260f, + 7.7747870596011737f, 7.7813597135246608f, 7.7879025593914317f, + 7.7944158663501062f, 7.8008998999203047f, 7.8073549220576037f, + 7.8137811912170374f, 7.8201789624151887f, 7.8265484872909159f, + 7.8328900141647422f, 7.8392037880969445f, 7.8454900509443757f, + 7.8517490414160571f, 7.8579809951275719f, 7.8641861446542798f, + 7.8703647195834048f, 7.8765169465650002f, 7.8826430493618425f, + 7.8887432488982601f, 7.8948177633079446f, 7.9008668079807496f, + 7.9068905956085187f, 7.9128893362299619f, 7.9188632372745955f, + 7.9248125036057813f, 7.9307373375628867f, 7.9366379390025719f, + 7.9425145053392399f, 7.9483672315846778f, 7.9541963103868758f, + 7.9600019320680806f, 7.9657842846620870f, 7.9715435539507720f, + 7.9772799234999168f, 7.9829935746943104f, 7.9886846867721664f, + 7.9943534368588578f +}; + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif Index: brotlipy-0.7.0/libbrotli/enc/fast_log.h =================================================================== --- brotlipy-0.7.0.orig/libbrotli/enc/fast_log.h +++ brotlipy-0.7.0/libbrotli/enc/fast_log.h @@ -28,105 +28,18 @@ static BROTLI_INLINE uint32_t Log2FloorN #endif } -/* A lookup table for small values of log2(int) to be used in entropy - computation. +#define BROTLI_LOG2_TABLE_SIZE 256 - ", ".join(["%.16ff" % x for x in [0.0]+[log2(x) for x in range(1, 256)]]) */ -static const float kLog2Table[] = { - 0.0000000000000000f, 0.0000000000000000f, 1.0000000000000000f, - 1.5849625007211563f, 2.0000000000000000f, 2.3219280948873622f, - 2.5849625007211561f, 2.8073549220576042f, 3.0000000000000000f, - 3.1699250014423126f, 3.3219280948873626f, 3.4594316186372978f, - 3.5849625007211565f, 3.7004397181410922f, 3.8073549220576037f, - 3.9068905956085187f, 4.0000000000000000f, 4.0874628412503400f, - 4.1699250014423122f, 4.2479275134435852f, 4.3219280948873626f, - 4.3923174227787607f, 4.4594316186372973f, 4.5235619560570131f, - 4.5849625007211570f, 4.6438561897747244f, 4.7004397181410926f, - 4.7548875021634691f, 4.8073549220576037f, 4.8579809951275728f, - 4.9068905956085187f, 4.9541963103868758f, 5.0000000000000000f, - 5.0443941193584534f, 5.0874628412503400f, 5.1292830169449664f, - 5.1699250014423122f, 5.2094533656289501f, 5.2479275134435852f, - 5.2854022188622487f, 5.3219280948873626f, 5.3575520046180838f, - 5.3923174227787607f, 5.4262647547020979f, 5.4594316186372973f, - 5.4918530963296748f, 5.5235619560570131f, 5.5545888516776376f, - 5.5849625007211570f, 5.6147098441152083f, 5.6438561897747244f, - 5.6724253419714961f, 5.7004397181410926f, 5.7279204545631996f, - 5.7548875021634691f, 5.7813597135246599f, 5.8073549220576046f, - 5.8328900141647422f, 5.8579809951275719f, 5.8826430493618416f, - 5.9068905956085187f, 5.9307373375628867f, 5.9541963103868758f, - 5.9772799234999168f, 6.0000000000000000f, 6.0223678130284544f, - 6.0443941193584534f, 6.0660891904577721f, 6.0874628412503400f, - 6.1085244567781700f, 6.1292830169449672f, 6.1497471195046822f, - 6.1699250014423122f, 6.1898245588800176f, 6.2094533656289510f, - 6.2288186904958804f, 6.2479275134435861f, 6.2667865406949019f, - 6.2854022188622487f, 6.3037807481771031f, 6.3219280948873617f, - 6.3398500028846252f, 6.3575520046180847f, 6.3750394313469254f, - 6.3923174227787598f, 6.4093909361377026f, 6.4262647547020979f, - 6.4429434958487288f, 6.4594316186372982f, 6.4757334309663976f, - 6.4918530963296748f, 6.5077946401986964f, 6.5235619560570131f, - 6.5391588111080319f, 6.5545888516776376f, 6.5698556083309478f, - 6.5849625007211561f, 6.5999128421871278f, 6.6147098441152092f, - 6.6293566200796095f, 6.6438561897747253f, 6.6582114827517955f, - 6.6724253419714952f, 6.6865005271832185f, 6.7004397181410917f, - 6.7142455176661224f, 6.7279204545631988f, 6.7414669864011465f, - 6.7548875021634691f, 6.7681843247769260f, 6.7813597135246599f, - 6.7944158663501062f, 6.8073549220576037f, 6.8201789624151887f, - 6.8328900141647422f, 6.8454900509443757f, 6.8579809951275719f, - 6.8703647195834048f, 6.8826430493618416f, 6.8948177633079437f, - 6.9068905956085187f, 6.9188632372745955f, 6.9307373375628867f, - 6.9425145053392399f, 6.9541963103868758f, 6.9657842846620879f, - 6.9772799234999168f, 6.9886846867721664f, 7.0000000000000000f, - 7.0112272554232540f, 7.0223678130284544f, 7.0334230015374501f, - 7.0443941193584534f, 7.0552824355011898f, 7.0660891904577721f, - 7.0768155970508317f, 7.0874628412503400f, 7.0980320829605272f, - 7.1085244567781700f, 7.1189410727235076f, 7.1292830169449664f, - 7.1395513523987937f, 7.1497471195046822f, 7.1598713367783891f, - 7.1699250014423130f, 7.1799090900149345f, 7.1898245588800176f, - 7.1996723448363644f, 7.2094533656289492f, 7.2191685204621621f, - 7.2288186904958804f, 7.2384047393250794f, 7.2479275134435861f, - 7.2573878426926521f, 7.2667865406949019f, 7.2761244052742384f, - 7.2854022188622487f, 7.2946207488916270f, 7.3037807481771031f, - 7.3128829552843557f, 7.3219280948873617f, 7.3309168781146177f, - 7.3398500028846243f, 7.3487281542310781f, 7.3575520046180847f, - 7.3663222142458151f, 7.3750394313469254f, 7.3837042924740528f, - 7.3923174227787607f, 7.4008794362821844f, 7.4093909361377026f, - 7.4178525148858991f, 7.4262647547020979f, 7.4346282276367255f, - 7.4429434958487288f, 7.4512111118323299f, 7.4594316186372973f, - 7.4676055500829976f, 7.4757334309663976f, 7.4838157772642564f, - 7.4918530963296748f, 7.4998458870832057f, 7.5077946401986964f, - 7.5156998382840436f, 7.5235619560570131f, 7.5313814605163119f, - 7.5391588111080319f, 7.5468944598876373f, 7.5545888516776376f, - 7.5622424242210728f, 7.5698556083309478f, 7.5774288280357487f, - 7.5849625007211561f, 7.5924570372680806f, 7.5999128421871278f, - 7.6073303137496113f, 7.6147098441152075f, 7.6220518194563764f, - 7.6293566200796095f, 7.6366246205436488f, 7.6438561897747244f, - 7.6510516911789290f, 7.6582114827517955f, 7.6653359171851765f, - 7.6724253419714952f, 7.6794800995054464f, 7.6865005271832185f, - 7.6934869574993252f, 7.7004397181410926f, 7.7073591320808825f, - 7.7142455176661224f, 7.7210991887071856f, 7.7279204545631996f, - 7.7347096202258392f, 7.7414669864011465f, 7.7481928495894596f, - 7.7548875021634691f, 7.7615512324444795f, 7.7681843247769260f, - 7.7747870596011737f, 7.7813597135246608f, 7.7879025593914317f, - 7.7944158663501062f, 7.8008998999203047f, 7.8073549220576037f, - 7.8137811912170374f, 7.8201789624151887f, 7.8265484872909159f, - 7.8328900141647422f, 7.8392037880969445f, 7.8454900509443757f, - 7.8517490414160571f, 7.8579809951275719f, 7.8641861446542798f, - 7.8703647195834048f, 7.8765169465650002f, 7.8826430493618425f, - 7.8887432488982601f, 7.8948177633079446f, 7.9008668079807496f, - 7.9068905956085187f, 7.9128893362299619f, 7.9188632372745955f, - 7.9248125036057813f, 7.9307373375628867f, 7.9366379390025719f, - 7.9425145053392399f, 7.9483672315846778f, 7.9541963103868758f, - 7.9600019320680806f, 7.9657842846620870f, 7.9715435539507720f, - 7.9772799234999168f, 7.9829935746943104f, 7.9886846867721664f, - 7.9943534368588578f -}; +/* A lookup table for small values of log2(int) to be used in entropy + computation. */ +BROTLI_INTERNAL extern const double kBrotliLog2Table[BROTLI_LOG2_TABLE_SIZE]; #define LOG_2_INV 1.4426950408889634 /* Faster logarithm for small integers, with the property of log2(0) == 0. */ static BROTLI_INLINE double FastLog2(size_t v) { - if (v < sizeof(kLog2Table) / sizeof(kLog2Table[0])) { - return kLog2Table[v]; + if (v < BROTLI_LOG2_TABLE_SIZE) { + return kBrotliLog2Table[v]; } #if (defined(_MSC_VER) && _MSC_VER <= 1700) || \ (defined(__ANDROID_API__) && __ANDROID_API__ < 18)
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