Initial work on new assert macro.

library/polyvoxcore/source/Impl/ErrorHandling.cpp

@@ -0,0 +1,70 @@
+#include "PolyVoxCore/Impl/ErrorHandling.h"
+
+#include <cstdio>
+#include <cstdarg>
+
+namespace PolyVox
+{
+
+namespace
+{
+
+Assert::FailBehavior DefaultHandler(const char* condition, 
+									const char* msg, 
+									const char* file, 
+									const int line)
+{
+	std::printf("%s(%d): Assert Failure: ", file, line);
+	
+	if (condition != NULL)
+		std::printf("'%s' ", condition);
+
+	if (msg != NULL)
+		std::printf("%s", msg);
+
+	std::printf("\n");
+
+	return Assert::Halt;
+}
+
+Assert::Handler& GetAssertHandlerInstance()
+{
+	static Assert::Handler s_handler = &DefaultHandler;
+	return s_handler;
+}
+
+}
+
+Assert::Handler Assert::GetHandler()
+{
+	return GetAssertHandlerInstance();
+}
+
+void Assert::SetHandler(Assert::Handler newHandler)
+{
+	GetAssertHandlerInstance() = newHandler;
+}
+
+Assert::FailBehavior Assert::ReportFailure(const char* condition, 
+										   const char* file, 
+										   const int line, 
+										   const char* msg, ...)
+{
+	const char* message = NULL;
+	if (msg != NULL)
+	{
+		char messageBuffer[1024];
+		{
+			va_list args;
+			va_start(args, msg);
+			vsnprintf(messageBuffer, 1024, msg, args);
+			va_end(args);
+		}
+
+		message = messageBuffer;
+	}
+
+	return GetAssertHandlerInstance()(condition, message, file, line);
+}
+
+}