/*
* Copyright (c) 2008, Power of Two Games LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*     * Neither the name of Power of Two Games LLC nor the
*       names of its contributors may be used to endorse or promote products
*       derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY POWER OF TWO GAMES LLC ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL POWER OF TWO GAMES LLC BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "Pow2Assert.h"

#include <cstdio>
#include <cstdarg>

namespace pow2 { namespace Assert
{

struct AssertHandler
{
	AssertHandler()
		: handler(&AssertHandler::DefaultHandler)
	{
	}

	static bool 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 true;
	}

	Handler handler;
};

AssertHandler& GetAssertHandlerInstance()
{
	static AssertHandler s_handler;
	return s_handler;
}


Handler GetHandler()
{
	return GetAssertHandlerInstance().handler;
}

void SetHandler(Handler newHandler)
{
	GetAssertHandlerInstance().handler = newHandler;
}

bool Report(const char* condition, const char* msg, const char* file, const int line)
{
	return GetAssertHandlerInstance().handler(condition, msg, file, line);
}

bool ReportFormatted(const char* condition, const char* file, const int line, const char* msg, ...)
{
	if (msg != NULL)
	{
		char messageBuffer[1024];
		{
			va_list args;
			va_start(args, msg);
			vsnprintf(messageBuffer, 1024, msg, args);
			va_end(args);
		}

		return Report(condition, messageBuffer, file, line);
	}

	return Report(condition, NULL, file, line);
}

}}