Added configurable assert handler function.

src/bx.cpp

@@ -22,6 +22,47 @@ namespace bx
 		return LocationFull(_function, _filePath, _line);
 	}
 
+	static bool defaultAssertHandler(const Location& _location, const char* _format, va_list _argList)
+	{
+		char temp[8192];
+		int32_t pos = 0;
+
+		pos += snprintf(&temp[pos], max(0, sizeof(temp)-pos), "%s(%d): "
+			, _location.filePath
+			, _location.line
+			);
+		pos += vsnprintf(&temp[pos], max(0, sizeof(temp)-pos), _format, _argList);
+		pos += snprintf(&temp[pos], max(0, sizeof(temp)-pos), "\n");
+		debugOutput(temp);
+
+		return true;
+	}
+
+	static AssertHandlerFn s_assertHandler = defaultAssertHandler;
+
+	void setAssertHandler(AssertHandlerFn _assertHandlerFn)
+	{
+		BX_WARN(defaultAssertHandler == s_assertHandler, "Assert handler is already set.");
+
+		if (defaultAssertHandler == s_assertHandler)
+		{
+			s_assertHandler = NULL == _assertHandlerFn
+				? defaultAssertHandler
+				: _assertHandlerFn
+				;
+		}
+	}
+
+	bool assertFunction(const Location& _location, const char* _format, ...)
+	{
+		va_list argList;
+		va_start(argList, _format);
+		const bool result = s_assertHandler(_location, _format, argList);
+		va_end(argList);
+
+		return result;
+	}
+
 	void swap(void* _a, void* _b, size_t _numBytes)
 	{
 		uint8_t* lhs = (uint8_t*)_a;