/*
* 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::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);
}

}