Merge 87103

Source/JavaScriptCore/wtf/MathExtras.h

 /*
  * 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
@@ skipping 202 matching lines @@
     const double maxIntAsDouble = std::numeric_limits<int>::max();
     return static_cast<int>(std::max(std::min(d, maxIntAsDouble), minIntAsDouble));
 }
 
 inline int clampToPositiveInteger(double d)
 {
     const double maxIntAsDouble = std::numeric_limits<int>::max();
     return static_cast<int>(std::max<double>(std::min(d, maxIntAsDouble), 0));
 }
 
-inline int clampToInteger(float d)
+inline int clampToInteger(float x)
 {
-    const float minIntAsFloat = static_cast<float>(std::numeric_limits<int>::min());
-    const float maxIntAsFloat = static_cast<float>(std::numeric_limits<int>::max());
-    return static_cast<int>(std::max(std::min(d, maxIntAsFloat), minIntAsFloat));
+    static const int s_intMax = std::numeric_limits<int>::max();
+    static const int s_intMin = std::numeric_limits<int>::min();
+    
+    if (x >= static_cast<float>(s_intMax))
+        return s_intMax;
+    if (x < static_cast<float>(s_intMin))
+        return s_intMin;
+    return static_cast<int>(x);
 }
 
-inline int clampToPositiveInteger(float d)
+inline int clampToPositiveInteger(float x)
 {
-    const float maxIntAsFloat = static_cast<float>(std::numeric_limits<int>::max());
-    return static_cast<int>(std::max<float>(std::min(d, maxIntAsFloat), 0));
+    static const int s_intMax = std::numeric_limits<int>::max();
+    
+    if (x >= static_cast<float>(s_intMax))
+        return s_intMax;
+    if (x < 0)
+        return 0;
+    return static_cast<int>(x);
 }
 
 inline int clampToInteger(unsigned value)
 {
     return static_cast<int>(std::min(value, static_cast<unsigned>(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