/*  Graph sort
 *  Copyleft (C) 2002 David Griffiths <dave@pawfal.org>
 *
 *  This program 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/ 

#include <vector>
#include <string>
#include <list>
#include <algorithm>
#include <map>

#ifndef GRAPH_SORT
#define GRAPH_SORT

using namespace std;

class GraphSort
{
public:
	GraphSort();
	~GraphSort();
	const list<int> &GetSortedList();
	void Sort();
	void AddConnection(int SID, int DID);
	void RemoveConnection(int SID, int DID);
	void Clear();
	void Dump();
	
	struct Node
	{
		list<int> Inputs;
		list<int> Outputs;
	};
	
private:
	void RecursiveWalk(int node);

	map<int,Node> m_Graph;
	list<int>     m_Sorted;
};

#endif