/*
 Copyright (c) 2013 yvt

 This file is part of OpenSpades.

 OpenSpades is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 OpenSpades is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with OpenSpades.  If not, see <http://www.gnu.org/licenses/>.

 */

#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <mutex>

#include "Exception.h"
#include <Core/Strings.h>

namespace spades {
	namespace {
		char exceptionMessageBuffer[65536];
		std::mutex exceptionMessageBufferMutex;
	}
	Exception::Exception(const char *format, ...) {
		va_list va;
		va_start(va, format);
		vsprintf(exceptionMessageBuffer, format, va);
		va_end(va);
		message = exceptionMessageBuffer;
		shortMessage = message;
	}
	Exception::Exception(const char *file, int line, const char *format, ...) {
		reflection::Backtrace &trace = *reflection::Backtrace::GetGlobalBacktrace();

		{
			std::lock_guard<std::mutex> guard{exceptionMessageBufferMutex};
			va_list va;
			va_start(va, format);
			exceptionMessageBuffer[65535] = 0;
			std::vsnprintf(exceptionMessageBuffer, 65535, format, va);
			va_end(va);
			message = exceptionMessageBuffer;
		}
		shortMessage = message;

		message = Format("{0}\nat {1}:{2}\n{3}", message, file, line, trace.ToString());
	}
	Exception::~Exception() noexcept {}
	const char *Exception::what() const noexcept { return message.c_str(); }
}