Add Memoizer class

--HG--
branch : box2d-update

src/common/Memoizer.cpp

@@ -0,0 +1,43 @@
+/**
+* Copyright (c) 2006-2011 LOVE Development Team
+* 
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* 
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 
+* 1. The origin of this software must not be misrepresented; you must not
+*    claim that you wrote the original software. If you use this software
+*    in a product, an acknowledgment in the product documentation would be
+*    appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+*    misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+**/
+#include "Memoizer.h"
+
+namespace love
+{
+
+	std::map<void *, void *> Memoizer::objectMap;
+
+	void Memoizer::add(void * key, void * val)
+	{
+		objectMap[key] = val;
+	}
+	
+	void Memoizer::remove(void * key)
+	{
+		objectMap.erase(key);
+	}
+	
+	void * Memoizer::find(void * key)
+	{
+		if (objectMap.count(key)) return objectMap[key];
+		return NULL;
+	}
+
+} // love

src/common/Memoizer.h

@@ -0,0 +1,46 @@
+/**
+* Copyright (c) 2006-2011 LOVE Development Team
+* 
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* 
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 
+* 1. The origin of this software must not be misrepresented; you must not
+*    claim that you wrote the original software. If you use this software
+*    in a product, an acknowledgment in the product documentation would be
+*    appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+*    misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+**/
+
+#ifndef LOVE_MEMOIZER_H
+#define LOVE_MEMOIZER_H
+
+#include <map>
+
+namespace love
+{
+	class Memoizer
+	{
+	private:
+
+		static std::map<void *, void *> objectMap;
+
+	public:
+
+		static void add(void * key, void * val);
+		
+		static void remove(void * key);
+		
+		static void * find(void * key);
+
+	}; // Memoizer
+
+} // love
+
+#endif // LOVE_MEMOIZER_H