Index: Source/WTF/wtf/MathExtras.h |
diff --git a/Source/WTF/wtf/MathExtras.h b/Source/WTF/wtf/MathExtras.h |
deleted file mode 100644 |
index 47441128aa90db6849118cb0df19cbfb8089672d..0000000000000000000000000000000000000000 |
--- a/Source/WTF/wtf/MathExtras.h |
+++ /dev/null |
@@ -1,454 +0,0 @@ |
-/* |
- * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. |
- * |
- * Redistribution and use in source and binary forms, with or without |
- * modification, are permitted provided that the following conditions |
- * are met: |
- * 1. Redistributions of source code must retain the above copyright |
- * notice, this list of conditions and the following disclaimer. |
- * 2. Redistributions in binary form must reproduce the above copyright |
- * notice, this list of conditions and the following disclaimer in the |
- * documentation and/or other materials provided with the distribution. |
- * |
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
- */ |
- |
-#ifndef WTF_MathExtras_h |
-#define WTF_MathExtras_h |
- |
-#include <algorithm> |
-#include <cmath> |
-#include <float.h> |
-#include <limits> |
-#include <stdint.h> |
-#include <stdlib.h> |
-#include <wtf/StdLibExtras.h> |
- |
-#if OS(SOLARIS) |
-#include <ieeefp.h> |
-#endif |
- |
-#if OS(OPENBSD) |
-#include <sys/types.h> |
-#include <machine/ieee.h> |
-#endif |
- |
-#if OS(QNX) |
-// FIXME: Look into a way to have cmath import its functions into both the standard and global |
-// namespace. For now, we include math.h since the QNX cmath header only imports its functions |
-// into the standard namespace. |
-#include <math.h> |
-#endif |
- |
-#ifndef M_PI |
-const double piDouble = 3.14159265358979323846; |
-const float piFloat = 3.14159265358979323846f; |
-#else |
-const double piDouble = M_PI; |
-const float piFloat = static_cast<float>(M_PI); |
-#endif |
- |
-#ifndef M_PI_2 |
-const double piOverTwoDouble = 1.57079632679489661923; |
-const float piOverTwoFloat = 1.57079632679489661923f; |
-#else |
-const double piOverTwoDouble = M_PI_2; |
-const float piOverTwoFloat = static_cast<float>(M_PI_2); |
-#endif |
- |
-#ifndef M_PI_4 |
-const double piOverFourDouble = 0.785398163397448309616; |
-const float piOverFourFloat = 0.785398163397448309616f; |
-#else |
-const double piOverFourDouble = M_PI_4; |
-const float piOverFourFloat = static_cast<float>(M_PI_4); |
-#endif |
- |
-#if OS(DARWIN) |
- |
-// Work around a bug in the Mac OS X libc where ceil(-0.1) return +0. |
-inline double wtf_ceil(double x) { return copysign(ceil(x), x); } |
- |
-#define ceil(x) wtf_ceil(x) |
- |
-#endif |
- |
-#if OS(SOLARIS) |
- |
-namespace std { |
- |
-#ifndef isfinite |
-inline bool isfinite(double x) { return finite(x) && !isnand(x); } |
-#endif |
-#ifndef signbit |
-inline bool signbit(double x) { return copysign(1.0, x) < 0; } |
-#endif |
-#ifndef isinf |
-inline bool isinf(double x) { return !finite(x) && !isnand(x); } |
-#endif |
- |
-} // namespace std |
- |
-#endif |
- |
-#if OS(OPENBSD) |
- |
-namespace std { |
- |
-#ifndef isfinite |
-inline bool isfinite(double x) { return finite(x); } |
-#endif |
-#ifndef signbit |
-inline bool signbit(double x) { struct ieee_double *p = (struct ieee_double *)&x; return p->dbl_sign; } |
-#endif |
- |
-} // namespace std |
- |
-#endif |
- |
-#if COMPILER(MSVC) |
- |
-// We must not do 'num + 0.5' or 'num - 0.5' because they can cause precision loss. |
-static double round(double num) |
-{ |
- double integer = ceil(num); |
- if (num > 0) |
- return integer - num > 0.5 ? integer - 1.0 : integer; |
- return integer - num >= 0.5 ? integer - 1.0 : integer; |
-} |
-static float roundf(float num) |
-{ |
- float integer = ceilf(num); |
- if (num > 0) |
- return integer - num > 0.5f ? integer - 1.0f : integer; |
- return integer - num >= 0.5f ? integer - 1.0f : integer; |
-} |
-inline long long llround(double num) { return static_cast<long long>(round(num)); } |
-inline long long llroundf(float num) { return static_cast<long long>(roundf(num)); } |
-inline long lround(double num) { return static_cast<long>(round(num)); } |
-inline long lroundf(float num) { return static_cast<long>(roundf(num)); } |
-inline double trunc(double num) { return num > 0 ? floor(num) : ceil(num); } |
- |
-#endif |
- |
-#if COMPILER(GCC) && OS(QNX) |
-// The stdlib on QNX doesn't contain long abs(long). See PR #104666. |
-inline long long abs(long num) { return labs(num); } |
-#endif |
- |
-#if OS(ANDROID) || COMPILER(MSVC) |
-// ANDROID and MSVC's math.h does not currently supply log2 or log2f. |
-inline double log2(double num) |
-{ |
- // This constant is roughly M_LN2, which is not provided by default on Windows and Android. |
- return log(num) / 0.693147180559945309417232121458176568; |
-} |
- |
-inline float log2f(float num) |
-{ |
- // This constant is roughly M_LN2, which is not provided by default on Windows and Android. |
- return logf(num) / 0.693147180559945309417232121458176568f; |
-} |
-#endif |
- |
-#if COMPILER(MSVC) |
-// The 64bit version of abs() is already defined in stdlib.h which comes with VC10 |
-#if COMPILER(MSVC9_OR_LOWER) |
-inline long long abs(long long num) { return _abs64(num); } |
-#endif |
- |
-namespace std { |
- |
-inline bool isinf(double num) { return !_finite(num) && !_isnan(num); } |
-inline bool isnan(double num) { return !!_isnan(num); } |
-inline bool isfinite(double x) { return _finite(x); } |
-inline bool signbit(double num) { return _copysign(1.0, num) < 0; } |
- |
-} // namespace std |
- |
-inline double nextafter(double x, double y) { return _nextafter(x, y); } |
-inline float nextafterf(float x, float y) { return x > y ? x - FLT_EPSILON : x + FLT_EPSILON; } |
- |
-inline double copysign(double x, double y) { return _copysign(x, y); } |
- |
-// Work around a bug in Win, where atan2(+-infinity, +-infinity) yields NaN instead of specific values. |
-inline double wtf_atan2(double x, double y) |
-{ |
- double posInf = std::numeric_limits<double>::infinity(); |
- double negInf = -std::numeric_limits<double>::infinity(); |
- double nan = std::numeric_limits<double>::quiet_NaN(); |
- |
- double result = nan; |
- |
- if (x == posInf && y == posInf) |
- result = piOverFourDouble; |
- else if (x == posInf && y == negInf) |
- result = 3 * piOverFourDouble; |
- else if (x == negInf && y == posInf) |
- result = -piOverFourDouble; |
- else if (x == negInf && y == negInf) |
- result = -3 * piOverFourDouble; |
- else |
- result = ::atan2(x, y); |
- |
- return result; |
-} |
- |
-// Work around a bug in the Microsoft CRT, where fmod(x, +-infinity) yields NaN instead of x. |
-inline double wtf_fmod(double x, double y) { return (!std::isinf(x) && std::isinf(y)) ? x : fmod(x, y); } |
- |
-// Work around a bug in the Microsoft CRT, where pow(NaN, 0) yields NaN instead of 1. |
-inline double wtf_pow(double x, double y) { return y == 0 ? 1 : pow(x, y); } |
- |
-#define atan2(x, y) wtf_atan2(x, y) |
-#define fmod(x, y) wtf_fmod(x, y) |
-#define pow(x, y) wtf_pow(x, y) |
- |
-// MSVC's math functions do not bring lrint. |
-inline long int lrint(double flt) |
-{ |
- int64_t intgr; |
-#if CPU(X86) |
- __asm { |
- fld flt |
- fistp intgr |
- }; |
-#else |
- ASSERT(std::isfinite(flt)); |
- double rounded = round(flt); |
- intgr = static_cast<int64_t>(rounded); |
- // If the fractional part is exactly 0.5, we need to check whether |
- // the rounded result is even. If it is not we need to add 1 to |
- // negative values and subtract one from positive values. |
- if ((fabs(intgr - flt) == 0.5) & intgr) |
- intgr -= ((intgr >> 62) | 1); // 1 with the sign of result, i.e. -1 or 1. |
-#endif |
- return static_cast<long int>(intgr); |
-} |
- |
-#endif // COMPILER(MSVC) |
- |
-inline double deg2rad(double d) { return d * piDouble / 180.0; } |
-inline double rad2deg(double r) { return r * 180.0 / piDouble; } |
-inline double deg2grad(double d) { return d * 400.0 / 360.0; } |
-inline double grad2deg(double g) { return g * 360.0 / 400.0; } |
-inline double turn2deg(double t) { return t * 360.0; } |
-inline double deg2turn(double d) { return d / 360.0; } |
-inline double rad2grad(double r) { return r * 200.0 / piDouble; } |
-inline double grad2rad(double g) { return g * piDouble / 200.0; } |
- |
-inline float deg2rad(float d) { return d * piFloat / 180.0f; } |
-inline float rad2deg(float r) { return r * 180.0f / piFloat; } |
-inline float deg2grad(float d) { return d * 400.0f / 360.0f; } |
-inline float grad2deg(float g) { return g * 360.0f / 400.0f; } |
-inline float turn2deg(float t) { return t * 360.0f; } |
-inline float deg2turn(float d) { return d / 360.0f; } |
-inline float rad2grad(float r) { return r * 200.0f / piFloat; } |
-inline float grad2rad(float g) { return g * piFloat / 200.0f; } |
- |
-// std::numeric_limits<T>::min() returns the smallest positive value for floating point types |
-template<typename T> inline T defaultMinimumForClamp() { return std::numeric_limits<T>::min(); } |
-template<> inline float defaultMinimumForClamp() { return -std::numeric_limits<float>::max(); } |
-template<> inline double defaultMinimumForClamp() { return -std::numeric_limits<double>::max(); } |
-template<typename T> inline T defaultMaximumForClamp() { return std::numeric_limits<T>::max(); } |
- |
-template<typename T> inline T clampTo(double value, T min = defaultMinimumForClamp<T>(), T max = defaultMaximumForClamp<T>()) |
-{ |
- if (value >= static_cast<double>(max)) |
- return max; |
- if (value <= static_cast<double>(min)) |
- return min; |
- return static_cast<T>(value); |
-} |
-template<> inline long long int clampTo(double, long long int, long long int); // clampTo does not support long long ints. |
- |
-inline int clampToInteger(double value) |
-{ |
- return clampTo<int>(value); |
-} |
- |
-inline float clampToFloat(double value) |
-{ |
- return clampTo<float>(value); |
-} |
- |
-inline int clampToPositiveInteger(double value) |
-{ |
- return clampTo<int>(value, 0); |
-} |
- |
-inline int clampToInteger(float value) |
-{ |
- return clampTo<int>(value); |
-} |
- |
-inline int clampToInteger(unsigned x) |
-{ |
- const unsigned intMax = static_cast<unsigned>(std::numeric_limits<int>::max()); |
- |
- if (x >= intMax) |
- return std::numeric_limits<int>::max(); |
- return static_cast<int>(x); |
-} |
- |
-inline bool isWithinIntRange(float x) |
-{ |
- return x > static_cast<float>(std::numeric_limits<int>::min()) && x < static_cast<float>(std::numeric_limits<int>::max()); |
-} |
- |
-template<typename T> inline bool hasOneBitSet(T value) |
-{ |
- return !((value - 1) & value) && value; |
-} |
- |
-template<typename T> inline bool hasZeroOrOneBitsSet(T value) |
-{ |
- return !((value - 1) & value); |
-} |
- |
-template<typename T> inline bool hasTwoOrMoreBitsSet(T value) |
-{ |
- return !hasZeroOrOneBitsSet(value); |
-} |
- |
-template <typename T> inline unsigned getLSBSet(T value) |
-{ |
- unsigned result = 0; |
- |
- while (value >>= 1) |
- ++result; |
- |
- return result; |
-} |
- |
-template<typename T> inline T timesThreePlusOneDividedByTwo(T value) |
-{ |
- // Mathematically equivalent to: |
- // (value * 3 + 1) / 2; |
- // or: |
- // (unsigned)ceil(value * 1.5)); |
- // This form is not prone to internal overflow. |
- return value + (value >> 1) + (value & 1); |
-} |
- |
-#ifndef UINT64_C |
-#if COMPILER(MSVC) |
-#define UINT64_C(c) c ## ui64 |
-#else |
-#define UINT64_C(c) c ## ull |
-#endif |
-#endif |
- |
-#if COMPILER(MINGW64) && (!defined(__MINGW64_VERSION_RC) || __MINGW64_VERSION_RC < 1) |
-inline double wtf_pow(double x, double y) |
-{ |
- // MinGW-w64 has a custom implementation for pow. |
- // This handles certain special cases that are different. |
- if ((x == 0.0 || std::isinf(x)) && std::isfinite(y)) { |
- double f; |
- if (modf(y, &f) != 0.0) |
- return ((x == 0.0) ^ (y > 0.0)) ? std::numeric_limits<double>::infinity() : 0.0; |
- } |
- |
- if (x == 2.0) { |
- int yInt = static_cast<int>(y); |
- if (y == yInt) |
- return ldexp(1.0, yInt); |
- } |
- |
- return pow(x, y); |
-} |
-#define pow(x, y) wtf_pow(x, y) |
-#endif // COMPILER(MINGW64) && (!defined(__MINGW64_VERSION_RC) || __MINGW64_VERSION_RC < 1) |
- |
- |
-// decompose 'number' to its sign, exponent, and mantissa components. |
-// The result is interpreted as: |
-// (sign ? -1 : 1) * pow(2, exponent) * (mantissa / (1 << 52)) |
-inline void decomposeDouble(double number, bool& sign, int32_t& exponent, uint64_t& mantissa) |
-{ |
- ASSERT(std::isfinite(number)); |
- |
- sign = std::signbit(number); |
- |
- uint64_t bits = WTF::bitwise_cast<uint64_t>(number); |
- exponent = (static_cast<int32_t>(bits >> 52) & 0x7ff) - 0x3ff; |
- mantissa = bits & 0xFFFFFFFFFFFFFull; |
- |
- // Check for zero/denormal values; if so, adjust the exponent, |
- // if not insert the implicit, omitted leading 1 bit. |
- if (exponent == -0x3ff) |
- exponent = mantissa ? -0x3fe : 0; |
- else |
- mantissa |= 0x10000000000000ull; |
-} |
- |
-// Calculate d % 2^{64}. |
-inline void doubleToInteger(double d, unsigned long long& value) |
-{ |
- if (std::isnan(d) || std::isinf(d)) |
- value = 0; |
- else { |
- // -2^{64} < fmodValue < 2^{64}. |
- double fmodValue = fmod(trunc(d), std::numeric_limits<unsigned long long>::max() + 1.0); |
- if (fmodValue >= 0) { |
- // 0 <= fmodValue < 2^{64}. |
- // 0 <= value < 2^{64}. This cast causes no loss. |
- value = static_cast<unsigned long long>(fmodValue); |
- } else { |
- // -2^{64} < fmodValue < 0. |
- // 0 < fmodValueInUnsignedLongLong < 2^{64}. This cast causes no loss. |
- unsigned long long fmodValueInUnsignedLongLong = static_cast<unsigned long long>(-fmodValue); |
- // -1 < (std::numeric_limits<unsigned long long>::max() - fmodValueInUnsignedLongLong) < 2^{64} - 1. |
- // 0 < value < 2^{64}. |
- value = std::numeric_limits<unsigned long long>::max() - fmodValueInUnsignedLongLong + 1; |
- } |
- } |
-} |
- |
-namespace WTF { |
- |
-// From http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2 |
-inline uint32_t roundUpToPowerOfTwo(uint32_t v) |
-{ |
- v--; |
- v |= v >> 1; |
- v |= v >> 2; |
- v |= v >> 4; |
- v |= v >> 8; |
- v |= v >> 16; |
- v++; |
- return v; |
-} |
- |
-inline unsigned fastLog2(unsigned i) |
-{ |
- unsigned log2 = 0; |
- if (i & (i - 1)) |
- log2 += 1; |
- if (i >> 16) |
- log2 += 16, i >>= 16; |
- if (i >> 8) |
- log2 += 8, i >>= 8; |
- if (i >> 4) |
- log2 += 4, i >>= 4; |
- if (i >> 2) |
- log2 += 2, i >>= 2; |
- if (i >> 1) |
- log2 += 1; |
- return log2; |
-} |
- |
-} // namespace WTF |
- |
-#endif // #ifndef WTF_MathExtras_h |