lemon-0.x: src/work/jacint/dimacs_jgraph.hh@01d47457aff3 (annotated)

jacint@131	1	#ifndef DIMACS_HH
jacint@131	2	#define DIMACS_HH
jacint@131	3
jacint@131	4	#include <iostream>
jacint@131	5	#include <string>
jacint@131	6	#include <vector>
jacint@131	7
jacint@131	8	namespace hugo {
jacint@131	9
jacint@131	10	template<typename Graph, typename CapacityMap>
jacint@131	11	void readDimacsMaxFlow(std::istream& is, Graph &G, typename Graph::TrivNodeIt &s, typename Graph::TrivNodeIt &t, CapacityMap& capacity) {
jacint@131	12	G.clear();
jacint@131	13	int cap;
jacint@131	14	char d;
jacint@131	15	std::string problem;
jacint@131	16	char c;
jacint@131	17	int i, j;
jacint@131	18	std::string str;
jacint@131	19	int n, m;
jacint@131	20	std::vector<typename Graph::TrivNodeIt> nodes;
jacint@131	21	while (is>>c) {
jacint@131	22	switch (c) {
jacint@131	23	case 'c': //comment
jacint@131	24	getline(is, str);
jacint@131	25	break;
jacint@131	26	case 't': //type
jacint@131	27	getline(is, str);
jacint@131	28	break;
jacint@131	29	case 'p': //problem definition
jacint@131	30	is >> problem >> n >> m;
jacint@131	31	getline(is, str);
jacint@131	32	nodes.resize(n+1);
jacint@131	33	for (int k=1; k<=n; ++k) nodes[k]=G.addNode();
jacint@131	34	break;
jacint@131	35	case 'n': //node definition
jacint@131	36	if (problem=="sp") { //shortest path problem
jacint@131	37	is >> i;
jacint@131	38	getline(is, str);
jacint@131	39	s=nodes[i];
jacint@131	40	}
jacint@131	41	if (problem=="max") { //max flow problem
jacint@131	42	is >> i >> d;
jacint@131	43	getline(is, str);
jacint@131	44	if (d=='s') s=nodes[i];
jacint@131	45	if (d=='t') t=nodes[i];
jacint@131	46	}
jacint@131	47	break;
jacint@131	48	case 'a':
jacint@131	49	is >> i >> j >> cap;
jacint@131	50	getline(is, str);
jacint@131	51	typename Graph::TrivEdgeIt e=G.addEdge(nodes[i], nodes[j]);
jacint@131	52	capacity.update();
jacint@131	53	capacity.set(e, cap);
jacint@131	54	break;
jacint@131	55	}
jacint@131	56	}
jacint@131	57	}
jacint@131	58
jacint@131	59	} //namespace marci
jacint@131	60
jacint@131	61	#endif //DIMACS_HH

author	jacint
	Mon, 01 Mar 2004 17:24:34 +0000
changeset 142	01d47457aff3
permissions	-rw-r--r--