--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/JavaScriptCore/wtf/MathExtras.h Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,257 @@
+/*
+ * Copyright (C) 2006, 2007 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 <math.h>
+#include <time.h>
+
+#if COMPILER(MSVC)
+
+#include "kjs/operations.h"
+#include "kjs/value.h"
+#include <xmath.h>
+#include <limits>
+
+#if HAVE(FLOAT_H)
+#include <float.h>
+#endif
+
+#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_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 COMPILER(MSVC)
+
+inline bool isinf(double num) { return !_finite(num) && !_isnan(num); }
+inline bool isnan(double num) { return !!_isnan(num); }
+inline long lround(double num) { return static_cast<long>(num > 0 ? num + 0.5 : ceil(num - 0.5)); }
+inline long lroundf(float num) { return static_cast<long>(num > 0 ? num + 0.5f : ceilf(num - 0.5f)); }
+inline double round(double num) { return num > 0 ? floor(num + 0.5) : ceil(num - 0.5); }
+inline float roundf(float num) { return num > 0 ? floorf(num + 0.5f) : ceilf(num - 0.5f); }
+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); }
+
+// Work around a bug in Win, where atan2(+-infinity, +-infinity) yields NaN instead of specific values.
+inline double wtf_atan2(double x, double y)
+{
+ static double posInf = std::numeric_limits<double>::infinity();
+ static double negInf = -std::numeric_limits<double>::infinity();
+
+ double result = KJS::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); }
+
+#define fmod(x, y) wtf_fmod(x, y)
+
+#define atan2(x, y) wtf_atan2(x, y)
+
+#if defined(_CRT_RAND_S)
+// Initializes the random number generator.
+inline void wtf_random_init()
+{
+ // No need to initialize for rand_s.
+}
+
+// Returns a pseudo-random number in the range [0, 1).
+inline double wtf_random()
+{
+ unsigned u;
+ rand_s(&u);
+
+ return static_cast<double>(u) / (static_cast<double>(UINT_MAX) + 1.0);
+}
+#endif // _CRT_RAND_S
+
+#else
+
+// Initializes the random number generator.
+inline void wtf_random_init()
+{
+ srand(static_cast<unsigned>(time(0)));
+}
+
+// Returns a pseudo-random number in the range [0, 1).
+inline double wtf_random()
+{
+ return static_cast<double>(rand()) / (static_cast<double>(RAND_MAX) + 1.0);
+}
+
+#endif // #if COMPILER(MSVC)
+
+#if PLATFORM(SYMBIAN)
+
+#define FLT_EPSILON 1.19209290E-07F /* b**(1-p) */
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif // M_PI
+
+#ifndef M_PI_4
+#define M_PI_4 0.785398163397448309616
+#endif // M_PI_4
+
+#include <e32math.h>
+
+#define ceilf ceil
+#define fmodf fmod
+#define floorf floor
+inline long lround(double num) { return static_cast<long>(num > 0 ? num + 0.5 : ceil(num - 0.5)); }
+inline float lroundf(float num) { return num > 0 ? num + 0.5f : ceilf(num - 0.5f); }
+inline float roundf(float num) { return num > 0 ? floorf(num + 0.5f) : ceilf(num - 0.5f); }
+inline int isfinite(double x) { return Math::IsFinite(x); }
+inline bool signbit(double num) { return copysign(1.0, num) < 0; }
+inline float nextafterf(float x, float y) { return x > y ? x - FLT_EPSILON : x + FLT_EPSILON; }
+
+//tot:taken from mruntime
+typedef union
+{
+ double value;
+ struct
+ {
+ unsigned int msw;
+ unsigned int lsw;
+ } parts;
+} ieee_double_shape_type;
+
+#define EXTRACT_WORDS(ix0,ix1,d) \
+do { \
+ ieee_double_shape_type ew_u; \
+ ew_u.value = (d); \
+ (ix0) = ew_u.parts.msw; \
+ (ix1) = ew_u.parts.lsw; \
+} while (0)
+
+#define INSERT_WORDS(d,ix0,ix1) \
+do { \
+ ieee_double_shape_type iw_u; \
+ iw_u.parts.msw = (ix0); \
+ iw_u.parts.lsw = (ix1); \
+ (d) = iw_u.value; \
+} while (0)
+
+inline double nextafter(double x, double y)
+{
+ volatile double t;
+ int hx,hy,ix,iy;
+ unsigned int lx,ly;
+
+ EXTRACT_WORDS(hx,lx,x);
+ EXTRACT_WORDS(hy,ly,y);
+ ix = hx&0x7fffffff; /* |x| */
+ iy = hy&0x7fffffff; /* |y| */
+
+ if(((ix>=0x7ff00000)&&((ix-0x7ff00000)|lx)!=0) || /* x is nan */
+ ((iy>=0x7ff00000)&&((iy-0x7ff00000)|ly)!=0)) /* y is nan */
+ return x+y;
+ if(x==y) return y; /* x=y, return y */
+ if((ix|lx)==0) { /* x == 0 */
+ INSERT_WORDS(x,hy&0x80000000,1); /* return +-minsubnormal */
+ t = x*x;
+ if(t==x) return t; else return x; /* raise underflow flag */
+ }
+ if(hx>=0) { /* x > 0 */
+ if(hx>hy||((hx==hy)&&(lx>ly))) { /* x > y, x -= ulp */
+ if(lx==0) hx -= 1;
+ lx -= 1;
+ } else { /* x < y, x += ulp */
+ lx += 1;
+ if(lx==0) hx += 1;
+ }
+ } else { /* x < 0 */
+ if(hy>=0||hx>hy||((hx==hy)&&(lx>ly))){/* x < y, x -= ulp */
+ if(lx==0) hx -= 1;
+ lx -= 1;
+ } else { /* x > y, x += ulp */
+ lx += 1;
+ if(lx==0) hx += 1;
+ }
+ }
+ hy = hx&0x7ff00000;
+ if(hy>=0x7ff00000) return x+x; /* overflow */
+ if(hy<0x00100000) { /* underflow */
+ t = x*x;
+ if(t!=x) { /* raise underflow flag */
+ INSERT_WORDS(y,hx,lx);
+ return y;
+ }
+ }
+ INSERT_WORDS(x,hx,lx);
+ return x;
+}
+
+inline float atan2f(float x, float y)
+{
+ return ((float)atan2((double)x, (double)y));
+}
+
+inline float cosf(float x)
+{
+ return ((float)cos((double)x));
+}
+
+inline float sinf(float x)
+{
+ return ((float)sin((double)x));
+}
+
+
+#endif // #if PLATFORM(SYMBIAN)
+
+#endif // #ifndef WTF_MathExtras_h