Add Memoizer class

--HG--
branch : box2d-update

platform/macosx/love.xcodeproj/project.pbxproj

@@ -216,6 +216,7 @@
 		A9D1D20D14229B6500A8BC2F /* wrap_ChainShape.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A9D1D20C14229B5800A8BC2F /* wrap_ChainShape.cpp */; };
 		A9D307EA106635C3004FEDF8 /* physfs.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = A9D307E9106635C3004FEDF8 /* physfs.framework */; };
 		A9D307F2106635D3004FEDF8 /* physfs.framework in Copy Frameworks */ = {isa = PBXBuildFile; fileRef = A9D307E9106635C3004FEDF8 /* physfs.framework */; };
+		A9D5C47D142E32EE0044ECF7 /* Memoizer.cpp in Sources */ = {isa = PBXBuildFile; fileRef = A9D5C47C142E32ED0044ECF7 /* Memoizer.cpp */; };
 		A9DEC1C11046EFA70049C70C /* Love.icns in Resources */ = {isa = PBXBuildFile; fileRef = A9DEC1BF1046EFA60049C70C /* Love.icns */; };
 		A9DEC1C21046EFA70049C70C /* LoveDocument.icns in Resources */ = {isa = PBXBuildFile; fileRef = A9DEC1C01046EFA70049C70C /* LoveDocument.icns */; };
 		A9F16927109E7BAD00FC83D1 /* libmodplug.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = A9F16926109E7BAD00FC83D1 /* libmodplug.framework */; };
@@ -685,6 +686,8 @@
 		A9D1D20C14229B5800A8BC2F /* wrap_ChainShape.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = wrap_ChainShape.cpp; sourceTree = "<group>"; };
 		A9D1D20E14229B7300A8BC2F /* wrap_ChainShape.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = wrap_ChainShape.h; sourceTree = "<group>"; };
 		A9D307E9106635C3004FEDF8 /* physfs.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = physfs.framework; path = /Library/Frameworks/physfs.framework; sourceTree = "<absolute>"; };
+		A9D5C47B142E31350044ECF7 /* Memoizer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Memoizer.h; sourceTree = "<group>"; };
+		A9D5C47C142E32ED0044ECF7 /* Memoizer.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Memoizer.cpp; sourceTree = "<group>"; };
 		A9DEC1BF1046EFA60049C70C /* Love.icns */ = {isa = PBXFileReference; lastKnownFileType = image.icns; name = Love.icns; path = icons/Love.icns; sourceTree = "<group>"; };
 		A9DEC1C01046EFA70049C70C /* LoveDocument.icns */ = {isa = PBXFileReference; lastKnownFileType = image.icns; name = LoveDocument.icns; path = icons/LoveDocument.icns; sourceTree = "<group>"; };
 		A9F16926109E7BAD00FC83D1 /* libmodplug.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = libmodplug.framework; path = /Library/Frameworks/libmodplug.framework; sourceTree = "<absolute>"; };
@@ -810,6 +813,8 @@
 				A93E69E210420ABF007D418B /* math.h */,
 				A93E69E310420ABF007D418B /* Matrix.cpp */,
 				A93E69E410420ABF007D418B /* Matrix.h */,
+				A9D5C47C142E32ED0044ECF7 /* Memoizer.cpp */,
+				A9D5C47B142E31350044ECF7 /* Memoizer.h */,
 				A93E69E510420ABF007D418B /* MemoryData.cpp */,
 				A93E69E610420ABF007D418B /* MemoryData.h */,
 				A93E69E710420ABF007D418B /* Module.h */,
@@ -1819,6 +1824,7 @@
 				A9D1D20D14229B6500A8BC2F /* wrap_ChainShape.cpp in Sources */,
 				A958F911142D364C007F320F /* wrap_Fixture.cpp in Sources */,
 				A958F917142D6B3A007F320F /* Body.cpp in Sources */,
+				A9D5C47D142E32EE0044ECF7 /* Memoizer.cpp in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

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