Initial work on new assert macro.

library/PolyVoxCore/include/PolyVoxCore/Impl/ErrorHandling.h

@@ -0,0 +1,77 @@
+/*******************************************************************************
+Copyright (c) 2005-2009 David Williams
+
+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 __PolyVox_ErrorHandling_H__
+#define __PolyVox_ErrorHandling_H__
+
+#define POLYVOX_ASSERTS_ENABLED
+
+namespace PolyVox
+{
+	namespace Assert
+	{
+		enum FailBehavior
+		{
+			Halt,
+			Continue,
+		};
+
+		typedef FailBehavior (*Handler)(const char* condition, const char* msg, const char* file, int line);
+
+		Handler GetHandler();
+		void SetHandler(Handler newHandler);
+
+		FailBehavior ReportFailure(const char* condition, 
+								   const char* file, 
+								   int line, 
+								   const char* msg, ...);
+	}
+}
+
+#define POLYVOX_HALT() __debugbreak()
+#define POLYVOX_UNUSED(x) do { (void)sizeof(x); } while(0)
+
+#ifdef POLYVOX_ASSERTS_ENABLED
+
+	#define POLYVOX_ASSERT(cond, msg, ...) \
+		do \
+		{ \
+			if (!(cond)) \
+			{ \
+				if (PolyVox::Assert::ReportFailure(#cond, __FILE__, __LINE__, (msg), __VA_ARGS__) == \
+					PolyVox::Assert::Halt) \
+					POLYVOX_HALT(); \
+			} \
+		} while(0)
+
+#else
+	
+	#define POLYVOX_ASSERT(condition, msg, ...) \
+		do { POLYVOX_UNUSED(condition); POLYVOX_UNUSED(msg); } while(0)
+	
+#endif
+
+#define POLYVOX_STATIC_ASSERT(x) \
+	typedef char polyvoxStaticAssert[(x) ? 1 : -1];
+
+#endif //__PolyVox_ErrorHandling_H__