/**
 * vim: set ts=4 sw=4 tw=99 noet :
 * =============================================================================
 * SourceMod
 * Copyright (C) 2004-2017 AlliedModders LLC.  All rights reserved.
 * =============================================================================
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, version 3.0, as published by the
 * Free Software Foundation.
 * 
 * This program 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
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, AlliedModders LLC gives you permission to link the
 * code of this program (as well as its derivative works) to "Half-Life 2," the
 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
 * by the Valve Corporation.  You must obey the GNU General Public License in
 * all respects for all other code used.  Additionally, AlliedModders LLC grants
 * this exception to all derivative works.  AlliedModders LLC defines further
 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
 * or <http://www.sourcemod.net/license.php>.
 *
 * Version: $Id$
 */
 
#include "sp_vm_api.h"
#include <am-vector.h>
#include <am-string.h>

using namespace SourcePawn;

/**
 * Frame iterator cache which is safe for plugins to hold handles to,
 * unlike what you'd recieve from IPluginContext::CreateFrameIterator.
 */
class SafeFrameIterator
{
public:

	/**
	 * Struct which holds all of the cached values for each individual frame.
	 */
	struct FrameInfo
	{	
		std::string FunctionName;
		std::string FilePath;
		unsigned LineNumber;

		FrameInfo(IFrameIterator *it)
		{		
			LineNumber = it->LineNumber();
			
			if (it->FunctionName())
				FunctionName = it->FunctionName();
			if (it->FilePath())
				FilePath = it->FilePath();
		}
	};

	SafeFrameIterator(IFrameIterator *);

	bool Done() const;
	bool Next();
	void Reset();

	int LineNumber() const;
	const char *FunctionName() const;
	const char *FilePath() const;

private:
	size_t current;
	std::vector<FrameInfo> frames;
};