alpar@400: /* -*- mode: C++; indent-tabs-mode: nil; -*-
alpar@400:  *
alpar@400:  * This file is a part of LEMON, a generic C++ optimization library.
alpar@400:  *
alpar@463:  * Copyright (C) 2003-2009
alpar@400:  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@400:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
alpar@400:  *
alpar@400:  * Permission to use, modify and distribute this software is granted
alpar@400:  * provided that this copyright notice appears in all copies. For
alpar@400:  * precise terms see the accompanying LICENSE file.
alpar@400:  *
alpar@400:  * This software is provided "AS IS" with no warranty of any kind,
alpar@400:  * express or implied, and with no claim as to its suitability for any
alpar@400:  * purpose.
alpar@400:  *
alpar@400:  */
alpar@400: 
alpar@400: ///\ingroup tools
alpar@400: ///\file
kpeter@579: ///\brief DIMACS problem solver.
alpar@400: ///
kpeter@579: /// This program solves various problems given in DIMACS format.
alpar@400: ///
alpar@400: /// See
kpeter@631: /// \code
kpeter@631: ///   dimacs-solver --help
kpeter@631: /// \endcode
alpar@400: /// for more info on usage.
alpar@400: 
alpar@400: #include <iostream>
alpar@400: #include <fstream>
alpar@400: #include <cstring>
alpar@400: 
alpar@400: #include <lemon/smart_graph.h>
alpar@400: #include <lemon/dimacs.h>
alpar@400: #include <lemon/lgf_writer.h>
alpar@573: #include <lemon/time_measure.h>
alpar@400: 
alpar@400: #include <lemon/arg_parser.h>
alpar@402: #include <lemon/error.h>
alpar@400: 
alpar@573: #include <lemon/dijkstra.h>
alpar@573: #include <lemon/preflow.h>
kpeter@641: #include <lemon/matching.h>
kpeter@649: #include <lemon/network_simplex.h>
alpar@573: 
alpar@400: using namespace lemon;
alpar@573: typedef SmartDigraph Digraph;
alpar@573: DIGRAPH_TYPEDEFS(Digraph);
alpar@573: typedef SmartGraph Graph;
alpar@400: 
alpar@573: template<class Value>
alpar@573: void solve_sp(ArgParser &ap, std::istream &is, std::ostream &,
alpar@573:               DimacsDescriptor &desc)
alpar@573: {
alpar@573:   bool report = !ap.given("q");
alpar@573:   Digraph g;
alpar@573:   Node s;
alpar@573:   Digraph::ArcMap<Value> len(g);
alpar@573:   Timer t;
alpar@573:   t.restart();
alpar@573:   readDimacsSp(is, g, len, s, desc);
alpar@573:   if(report) std::cerr << "Read the file: " << t << '\n';
alpar@573:   t.restart();
alpar@573:   Dijkstra<Digraph, Digraph::ArcMap<Value> > dij(g,len);
alpar@573:   if(report) std::cerr << "Setup Dijkstra class: " << t << '\n';
alpar@573:   t.restart();
alpar@573:   dij.run(s);
alpar@573:   if(report) std::cerr << "Run Dijkstra: " << t << '\n';
alpar@573: }
alpar@573: 
alpar@573: template<class Value>
alpar@573: void solve_max(ArgParser &ap, std::istream &is, std::ostream &,
alpar@608:                Value infty, DimacsDescriptor &desc)
alpar@573: {
alpar@573:   bool report = !ap.given("q");
alpar@573:   Digraph g;
alpar@573:   Node s,t;
alpar@573:   Digraph::ArcMap<Value> cap(g);
alpar@573:   Timer ti;
alpar@573:   ti.restart();
alpar@608:   readDimacsMax(is, g, cap, s, t, infty, desc);
alpar@573:   if(report) std::cerr << "Read the file: " << ti << '\n';
alpar@573:   ti.restart();
alpar@573:   Preflow<Digraph, Digraph::ArcMap<Value> > pre(g,cap,s,t);
alpar@573:   if(report) std::cerr << "Setup Preflow class: " << ti << '\n';
alpar@573:   ti.restart();
alpar@573:   pre.run();
alpar@573:   if(report) std::cerr << "Run Preflow: " << ti << '\n';
alpar@573:   if(report) std::cerr << "\nMax flow value: " << pre.flowValue() << '\n';  
alpar@573: }
alpar@573: 
kpeter@649: template<class Value>
kpeter@649: void solve_min(ArgParser &ap, std::istream &is, std::ostream &,
kpeter@661:                Value infty, DimacsDescriptor &desc)
kpeter@649: {
kpeter@649:   bool report = !ap.given("q");
kpeter@649:   Digraph g;
kpeter@649:   Digraph::ArcMap<Value> lower(g), cap(g), cost(g);
kpeter@649:   Digraph::NodeMap<Value> sup(g);
kpeter@649:   Timer ti;
kpeter@661: 
kpeter@649:   ti.restart();
kpeter@661:   readDimacsMin(is, g, lower, cap, cost, sup, infty, desc);
kpeter@661:   ti.stop();
kpeter@661:   Value sum_sup = 0;
kpeter@661:   for (Digraph::NodeIt n(g); n != INVALID; ++n) {
kpeter@661:     sum_sup += sup[n];
kpeter@661:   }
kpeter@661:   if (report) {
kpeter@661:     std::cerr << "Sum of supply values: " << sum_sup << "\n";
kpeter@661:     if (sum_sup <= 0)
kpeter@661:       std::cerr << "GEQ supply contraints are used for NetworkSimplex\n\n";
kpeter@661:     else
kpeter@661:       std::cerr << "LEQ supply contraints are used for NetworkSimplex\n\n";
kpeter@661:   }
kpeter@649:   if (report) std::cerr << "Read the file: " << ti << '\n';
kpeter@661: 
kpeter@649:   ti.restart();
kpeter@652:   NetworkSimplex<Digraph, Value> ns(g);
kpeter@687:   ns.lowerMap(lower).upperMap(cap).costMap(cost).supplyMap(sup);
kpeter@687:   if (sum_sup > 0) ns.supplyType(ns.LEQ);
kpeter@649:   if (report) std::cerr << "Setup NetworkSimplex class: " << ti << '\n';
kpeter@649:   ti.restart();
kpeter@661:   bool res = ns.run();
kpeter@661:   if (report) {
kpeter@661:     std::cerr << "Run NetworkSimplex: " << ti << "\n\n";
kpeter@661:     std::cerr << "Feasible flow: " << (res ? "found" : "not found") << '\n';
kpeter@661:     if (res) std::cerr << "Min flow cost: " << ns.totalCost() << '\n';
kpeter@661:   }
kpeter@649: }
kpeter@649: 
alpar@573: void solve_mat(ArgParser &ap, std::istream &is, std::ostream &,
alpar@573:               DimacsDescriptor &desc)
alpar@573: {
alpar@573:   bool report = !ap.given("q");
alpar@573:   Graph g;
alpar@573:   Timer ti;
alpar@573:   ti.restart();
alpar@573:   readDimacsMat(is, g, desc);
alpar@573:   if(report) std::cerr << "Read the file: " << ti << '\n';
alpar@573:   ti.restart();
alpar@573:   MaxMatching<Graph> mat(g);
alpar@573:   if(report) std::cerr << "Setup MaxMatching class: " << ti << '\n';
alpar@573:   ti.restart();
alpar@573:   mat.run();
alpar@573:   if(report) std::cerr << "Run MaxMatching: " << ti << '\n';
alpar@573:   if(report) std::cerr << "\nCardinality of max matching: "
alpar@573:                        << mat.matchingSize() << '\n';  
alpar@573: }
alpar@573: 
alpar@573: 
alpar@573: template<class Value>
alpar@573: void solve(ArgParser &ap, std::istream &is, std::ostream &os,
alpar@573:            DimacsDescriptor &desc)
alpar@573: {
ladanyi@616:   std::stringstream iss(static_cast<std::string>(ap["infcap"]));
alpar@608:   Value infty;
alpar@608:   iss >> infty;
alpar@608:   if(iss.fail())
alpar@608:     {
alpar@608:       std::cerr << "Cannot interpret '"
alpar@608:                 << static_cast<std::string>(ap["infcap"]) << "' as infinite"
alpar@608:                 << std::endl;
alpar@608:       exit(1);
alpar@608:     }
alpar@608:   
alpar@573:   switch(desc.type)
alpar@573:     {
alpar@573:     case DimacsDescriptor::MIN:
kpeter@661:       solve_min<Value>(ap,is,os,infty,desc);
alpar@573:       break;
alpar@573:     case DimacsDescriptor::MAX:
alpar@608:       solve_max<Value>(ap,is,os,infty,desc);
alpar@573:       break;
alpar@573:     case DimacsDescriptor::SP:
alpar@573:       solve_sp<Value>(ap,is,os,desc);
alpar@573:       break;
alpar@573:     case DimacsDescriptor::MAT:
alpar@573:       solve_mat(ap,is,os,desc);
alpar@573:       break;
alpar@573:     default:
alpar@573:       break;
alpar@573:     }
alpar@573: }
alpar@400: 
alpar@400: int main(int argc, const char *argv[]) {
alpar@400:   typedef SmartDigraph Digraph;
alpar@400: 
alpar@400:   typedef Digraph::Arc Arc;
alpar@400: 
alpar@400:   std::string inputName;
alpar@400:   std::string outputName;
alpar@400: 
alpar@400:   ArgParser ap(argc, argv);
alpar@402:   ap.other("[INFILE [OUTFILE]]",
alpar@402:            "If either the INFILE or OUTFILE file is missing the standard\n"
alpar@402:            "     input/output will be used instead.")
alpar@573:     .boolOption("q", "Do not print any report")
alpar@573:     .boolOption("int","Use 'int' for capacities, costs etc. (default)")
alpar@573:     .optionGroup("datatype","int")
alpar@573: #ifdef HAVE_LONG_LONG
alpar@573:     .boolOption("long","Use 'long long' for capacities, costs etc.")
alpar@573:     .optionGroup("datatype","long")
alpar@573: #endif
alpar@573:     .boolOption("double","Use 'double' for capacities, costs etc.")
alpar@573:     .optionGroup("datatype","double")
alpar@573:     .boolOption("ldouble","Use 'long double' for capacities, costs etc.")
alpar@573:     .optionGroup("datatype","ldouble")
alpar@573:     .onlyOneGroup("datatype")
alpar@608:     .stringOption("infcap","Value used for 'very high' capacities","0")
alpar@400:     .run();
alpar@400: 
alpar@573:   std::ifstream input;
alpar@573:   std::ofstream output;
alpar@402: 
alpar@402:   switch(ap.files().size())
alpar@402:     {
alpar@402:     case 2:
alpar@402:       output.open(ap.files()[1].c_str());
alpar@402:       if (!output) {
alpar@402:         throw IoError("Cannot open the file for writing", ap.files()[1]);
alpar@402:       }
alpar@402:     case 1:
alpar@402:       input.open(ap.files()[0].c_str());
alpar@402:       if (!input) {
alpar@402:         throw IoError("File cannot be found", ap.files()[0]);
alpar@402:       }
alpar@402:     case 0:
alpar@402:       break;
alpar@402:     default:
alpar@573:       std::cerr << ap.commandName() << ": too many arguments\n";
alpar@402:       return 1;
kpeter@579:     }
alpar@573:   std::istream& is = (ap.files().size()<1 ? std::cin : input);
alpar@573:   std::ostream& os = (ap.files().size()<2 ? std::cout : output);
alpar@402: 
alpar@402:   DimacsDescriptor desc = dimacsType(is);
alpar@573:   
alpar@573:   if(!ap.given("q"))
alpar@402:     {
alpar@573:       std::cout << "Problem type: ";
alpar@573:       switch(desc.type)
alpar@573:         {
alpar@573:         case DimacsDescriptor::MIN:
alpar@573:           std::cout << "min";
alpar@573:           break;
alpar@573:         case DimacsDescriptor::MAX:
alpar@573:           std::cout << "max";
alpar@573:           break;
alpar@573:         case DimacsDescriptor::SP:
alpar@573:           std::cout << "sp";
alpar@573:         case DimacsDescriptor::MAT:
alpar@573:           std::cout << "mat";
alpar@573:           break;
alpar@573:         default:
alpar@573:           exit(1);
alpar@573:           break;
alpar@573:         }
alpar@573:       std::cout << "\nNum of nodes: " << desc.nodeNum;
alpar@573:       std::cout << "\nNum of arcs:  " << desc.edgeNum;
kpeter@579:       std::cout << "\n\n";
alpar@400:     }
alpar@573:     
alpar@573:   if(ap.given("double"))
alpar@573:     solve<double>(ap,is,os,desc);
alpar@573:   else if(ap.given("ldouble"))
alpar@573:     solve<long double>(ap,is,os,desc);
alpar@573: #ifdef HAVE_LONG_LONG
alpar@573:   else if(ap.given("long"))
alpar@573:     solve<long long>(ap,is,os,desc);
alpar@573: #endif
alpar@573:   else solve<int>(ap,is,os,desc);
alpar@573: 
alpar@400:   return 0;
alpar@400: }