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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/fast_log.h')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/fast_log.h | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/fast_log.h b/Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/fast_log.h deleted file mode 100644 index 2094f13e556..00000000000 --- a/Build/source/texk/dvisvgm/dvisvgm-src/libs/brotli/enc/fast_log.h +++ /dev/null @@ -1,66 +0,0 @@ -/* Copyright 2013 Google Inc. All Rights Reserved. - - Distributed under MIT license. - See file LICENSE for detail or copy at https://opensource.org/licenses/MIT -*/ - -/* Utilities for fast computation of logarithms. */ - -#ifndef BROTLI_ENC_FAST_LOG_H_ -#define BROTLI_ENC_FAST_LOG_H_ - -#include <math.h> - -#include "../common/platform.h" -#include <brotli/types.h> - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -static BROTLI_INLINE uint32_t Log2FloorNonZero(size_t n) { -#if defined(BROTLI_BSR32) - return BROTLI_BSR32((uint32_t)n); -#else - uint32_t result = 0; - while (n >>= 1) result++; - return result; -#endif -} - -#define BROTLI_LOG2_TABLE_SIZE 256 - -/* 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]; - -/* Visual Studio 2012 and Android API levels < 18 do not have the log2() - * function defined, so we use log() and a multiplication instead. */ -#if !defined(BROTLI_HAVE_LOG2) -#if ((defined(_MSC_VER) && _MSC_VER <= 1700) || \ - (defined(__ANDROID_API__) && __ANDROID_API__ < 18)) -#define BROTLI_HAVE_LOG2 0 -#else -#define BROTLI_HAVE_LOG2 1 -#endif -#endif - -#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 < BROTLI_LOG2_TABLE_SIZE) { - return kBrotliLog2Table[v]; - } -#if !(BROTLI_HAVE_LOG2) - return log((double)v) * LOG_2_INV; -#else - return log2((double)v); -#endif -} - -#if defined(__cplusplus) || defined(c_plusplus) -} /* extern "C" */ -#endif - -#endif /* BROTLI_ENC_FAST_LOG_H_ */ |