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128 lines
4.6 KiB
C++
128 lines
4.6 KiB
C++
/*
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* Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef WTF_MathExtras_h
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#define WTF_MathExtras_h
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#include <math.h>
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#if PLATFORM(WIN)
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#include "kjs/operations.h"
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#include "kjs/value.h"
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#include <xmath.h>
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#include <limits>
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#if HAVE(FLOAT_H)
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#include <float.h>
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#endif
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#endif
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#ifndef M_PI
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const double piDouble = 3.14159265358979323846;
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const float piFloat = 3.14159265358979323846f;
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#else
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const double piDouble = M_PI;
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const float piFloat = static_cast<float>(M_PI);
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#endif
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#ifndef M_PI_4
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const double piOverFourDouble = 0.785398163397448309616;
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const float piOverFourFloat = 0.785398163397448309616f;
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#else
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const double piOverFourDouble = M_PI_4;
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const float piOverFourFloat = static_cast<float>(M_PI_4);
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#endif // !BUILDING_KDE__
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#if COMPILER(MSVC)
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#ifndef BUILDING_KDE__
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inline bool isinf(double num) { return !_finite(num) && !_isnan(num); }
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inline bool isnan(double num) { return _isnan(num); }
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inline long lround(double num) { return num > 0 ? num + 0.5 : ceil(num - 0.5); }
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inline long lroundf(float num) { return num > 0 ? num + 0.5f : ceilf(num - 0.5f); }
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inline double round(double num) { return num > 0 ? floor(num + 0.5) : ceil(num - 0.5); }
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inline float roundf(float num) { return num > 0 ? floorf(num + 0.5f) : ceilf(num - 0.5f); }
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inline bool signbit(double num) { return _copysign(1.0, num) < 0; }
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#endif
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#ifndef BUILDING_KDE__
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// FIXME: where to get std::numeric_limits from?
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// Work around a bug in Win, where atan2(+-infinity, +-infinity) yields NaN instead of specific values.
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inline double wtf_atan2(double x, double y)
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{
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static double posInf = std::numeric_limits<double>::infinity();
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static double negInf = -std::numeric_limits<double>::infinity();
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double result = KJS::NaN;
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if (x == posInf && y == posInf)
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result = piOverFourDouble;
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else if (x == posInf && y == negInf)
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result = 3 * piOverFourDouble;
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else if (x == negInf && y == posInf)
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result = -piOverFourDouble;
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else if (x == negInf && y == negInf)
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result = -3 * piOverFourDouble;
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else
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result = ::atan2(x, y);
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return result;
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}
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#else // !BUILDING_KDE__
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#define wtf_atan2(x, y) atan2(x, y)
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#endif // !BUILDING_KDE__
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#if COMPILER(MSVC)
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// Work around a bug in the Microsoft CRT, where fmod(x, +-infinity) yields NaN instead of x.
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inline double wtf_fmod(double x, double y) { return (!isinf(x) && isinf(y)) ? x : fmod(x, y); }
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#define fmod(x, y) wtf_fmod(x, y)
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#endif // #if COMPILER(MSVC)
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#define atan2(x, y) wtf_atan2(x, y)
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#endif // #if PLATFORM(WIN)
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inline double deg2rad(double d) { return d * piDouble / 180.0; }
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inline double rad2deg(double r) { return r * 180.0 / piDouble; }
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inline double deg2grad(double d) { return d * 400.0 / 360.0; }
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inline double grad2deg(double g) { return g * 360.0 / 400.0; }
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inline double rad2grad(double r) { return r * 200.0 / piDouble; }
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inline double grad2rad(double g) { return g * piDouble / 200.0; }
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inline float deg2rad(float d) { return d * piFloat / 180.0f; }
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inline float rad2deg(float r) { return r * 180.0f / piFloat; }
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inline float deg2grad(float d) { return d * 400.0f / 360.0f; }
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inline float grad2deg(float g) { return g * 360.0f / 400.0f; }
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inline float rad2grad(float r) { return r * 200.0f / piFloat; }
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inline float grad2rad(float g) { return g * piFloat / 200.0f; }
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#endif // #ifndef WTF_MathExtras_h
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