fixed #117

cocos2dx/platform/CCXMath.h

@@ -0,0 +1,60 @@
+/****************************************************************************
+Copyright (c) 2010 cocos2d-x.org
+
+http://www.cocos2d-x.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+****************************************************************************/
+
+#ifndef __PLATFORM_CCXMATH_H__
+#define __PLATFORM_CCXMATH_H__
+
+#include <float.h>
+
+namespace cocos2d
+{
+
+	/************************************************************************/
+	// VC have the function _isnan()
+	// In other compiler(such as gcc), we may implement ourself.
+	// We use a simple way: if it is a number, it should equal to itself.
+	/************************************************************************/
+	class CCXMath
+	{
+	public:
+		static inline int isnanCocos2d(double fValue)
+		{
+	 #ifdef WIN32
+ 			return _isnan(fValue);
+	 #else
+ 			if (fValue != fValue)
+ 			{
+ 				return 1;
+ 			}
+ 			else
+ 			{
+ 				return 0;
+ 			}
+	 #endif // WIN32
+		}
+	};
+	  
+	} // end of namespace cocos2d
+
+#endif // __PLATFORM_CCXMATH_H__