+++ /dev/null
-/*
- * 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 <stdlib.h>
-
-#if OS(SOLARIS)
-#include <ieeefp.h>
-#endif
-
-#if OS(OPENBSD)
-#include <sys/types.h>
-#include <machine/ieee.h>
-#endif
-
-#if COMPILER(MSVC)
-#if OS(WINCE)
-#include <stdlib.h>
-#endif
-#include <limits>
-#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)
-
-#ifndef isfinite
-inline bool isfinite(double x) { return finite(x) && !isnand(x); }
-#endif
-#ifndef isinf
-inline bool isinf(double x) { return !finite(x) && !isnand(x); }
-#endif
-#ifndef signbit
-inline bool signbit(double x) { return copysign(1.0, x) < 0; }
-#endif
-
-#endif
-
-#if OS(OPENBSD)
-
-#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
-
-#endif
-
-#if COMPILER(MSVC) || (COMPILER(RVCT) && !(RVCT_VERSION_AT_LEAST(3, 0, 0, 0)))
-
-// 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(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
-
-inline bool isinf(double num) { return !_finite(num) && !_isnan(num); }
-inline bool isnan(double num) { return !!_isnan(num); }
-inline bool signbit(double num) { return _copysign(1.0, num) < 0; }
-
-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); }
-inline int isfinite(double x) { return _finite(x); }
-
-// MSVC's math.h does not currently supply log2.
-inline double log2(double num)
-{
- // This constant is roughly M_LN2, which is not provided by default on Windows.
- return log(num) / 0.693147180559945309417232121458176568;
-}
-
-// 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 (!isinf(x) && 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)
-
-#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; }
-
-inline int clampToInteger(double x)
-{
- const double intMax = static_cast<double>(std::numeric_limits<int>::max());
- const double intMin = static_cast<double>(std::numeric_limits<int>::min());
-
- if (x >= intMax)
- return std::numeric_limits<int>::max();
- if (x <= intMin)
- return std::numeric_limits<int>::min();
- return static_cast<int>(x);
-}
-
-inline float clampToFloat(double x)
-{
- const double floatMax = static_cast<double>(std::numeric_limits<float>::max());
- const double floatMin = -static_cast<double>(std::numeric_limits<float>::max());
-
- if (x >= floatMax)
- return std::numeric_limits<float>::max();
- if (x <= floatMin)
- return -std::numeric_limits<float>::max();
- return static_cast<float>(x);
-}
-
-inline int clampToPositiveInteger(double x)
-{
- const double intMax = static_cast<double>(std::numeric_limits<int>::max());
-
- if (x >= intMax)
- return std::numeric_limits<int>::max();
- if (x <= 0)
- return 0;
- return static_cast<int>(x);
-}
-
-inline int clampToInteger(float x)
-{
- const float intMax = static_cast<float>(std::numeric_limits<int>::max());
- const float intMin = static_cast<float>(std::numeric_limits<int>::min());
-
- if (x >= intMax)
- return std::numeric_limits<int>::max();
- if (x <= intMin)
- return std::numeric_limits<int>::min();
- return static_cast<int>(x);
-}
-
-inline int clampToPositiveInteger(float x)
-{
- const float intMax = static_cast<float>(std::numeric_limits<int>::max());
-
- if (x >= intMax)
- return std::numeric_limits<int>::max();
- if (x <= 0)
- return 0;
- return static_cast<int>(x);
-}
-
-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());
-}
-
-#if !COMPILER(MSVC) && !(COMPILER(RVCT) && PLATFORM(BREWMP)) && !OS(SOLARIS) && !OS(SYMBIAN)
-using std::isfinite;
-using std::isinf;
-using std::isnan;
-using std::signbit;
-#endif
-
-#endif // #ifndef WTF_MathExtras_h
projects / apple / javascriptcore.git / blobdiff