alpar@385: /* -*- mode: C++; indent-tabs-mode: nil; -*-
alpar@385:  *
alpar@385:  * This file is a part of LEMON, a generic C++ optimization library.
alpar@385:  *
alpar@440:  * Copyright (C) 2003-2009
alpar@385:  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@385:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
alpar@385:  *
alpar@385:  * Permission to use, modify and distribute this software is granted
alpar@385:  * provided that this copyright notice appears in all copies. For
alpar@385:  * precise terms see the accompanying LICENSE file.
alpar@385:  *
alpar@385:  * This software is provided "AS IS" with no warranty of any kind,
alpar@385:  * express or implied, and with no claim as to its suitability for any
alpar@385:  * purpose.
alpar@385:  *
alpar@385:  */
alpar@385: 
alpar@385: ///\ingroup tools
alpar@385: ///\file
kpeter@532: ///\brief DIMACS problem solver.
alpar@385: ///
kpeter@532: /// This program solves various problems given in DIMACS format.
alpar@385: ///
alpar@385: /// See
kpeter@584: /// \code
kpeter@584: ///   dimacs-solver --help
kpeter@584: /// \endcode
alpar@385: /// for more info on usage.
alpar@385: 
alpar@385: #include <iostream>
alpar@385: #include <fstream>
alpar@385: #include <cstring>
alpar@385: 
alpar@385: #include <lemon/smart_graph.h>
alpar@385: #include <lemon/dimacs.h>
alpar@385: #include <lemon/lgf_writer.h>
alpar@526: #include <lemon/time_measure.h>
alpar@385: 
alpar@385: #include <lemon/arg_parser.h>
alpar@387: #include <lemon/error.h>
alpar@385: 
alpar@526: #include <lemon/dijkstra.h>
alpar@526: #include <lemon/preflow.h>
kpeter@594: #include <lemon/matching.h>
kpeter@602: #include <lemon/network_simplex.h>
alpar@526: 
alpar@385: using namespace lemon;
alpar@526: typedef SmartDigraph Digraph;
alpar@526: DIGRAPH_TYPEDEFS(Digraph);
alpar@526: typedef SmartGraph Graph;
alpar@385: 
alpar@526: template<class Value>
alpar@526: void solve_sp(ArgParser &ap, std::istream &is, std::ostream &,
alpar@526:               DimacsDescriptor &desc)
alpar@526: {
alpar@526:   bool report = !ap.given("q");
alpar@526:   Digraph g;
alpar@526:   Node s;
alpar@526:   Digraph::ArcMap<Value> len(g);
alpar@526:   Timer t;
alpar@526:   t.restart();
alpar@526:   readDimacsSp(is, g, len, s, desc);
alpar@526:   if(report) std::cerr << "Read the file: " << t << '\n';
alpar@526:   t.restart();
alpar@526:   Dijkstra<Digraph, Digraph::ArcMap<Value> > dij(g,len);
alpar@526:   if(report) std::cerr << "Setup Dijkstra class: " << t << '\n';
alpar@526:   t.restart();
alpar@526:   dij.run(s);
alpar@526:   if(report) std::cerr << "Run Dijkstra: " << t << '\n';
alpar@526: }
alpar@526: 
alpar@526: template<class Value>
alpar@526: void solve_max(ArgParser &ap, std::istream &is, std::ostream &,
alpar@561:                Value infty, DimacsDescriptor &desc)
alpar@526: {
alpar@526:   bool report = !ap.given("q");
alpar@526:   Digraph g;
alpar@526:   Node s,t;
alpar@526:   Digraph::ArcMap<Value> cap(g);
alpar@526:   Timer ti;
alpar@526:   ti.restart();
alpar@561:   readDimacsMax(is, g, cap, s, t, infty, desc);
alpar@526:   if(report) std::cerr << "Read the file: " << ti << '\n';
alpar@526:   ti.restart();
alpar@526:   Preflow<Digraph, Digraph::ArcMap<Value> > pre(g,cap,s,t);
alpar@526:   if(report) std::cerr << "Setup Preflow class: " << ti << '\n';
alpar@526:   ti.restart();
alpar@526:   pre.run();
alpar@526:   if(report) std::cerr << "Run Preflow: " << ti << '\n';
alpar@526:   if(report) std::cerr << "\nMax flow value: " << pre.flowValue() << '\n';  
alpar@526: }
alpar@526: 
kpeter@602: template<class Value>
kpeter@602: void solve_min(ArgParser &ap, std::istream &is, std::ostream &,
kpeter@614:                Value infty, DimacsDescriptor &desc)
kpeter@602: {
kpeter@602:   bool report = !ap.given("q");
kpeter@602:   Digraph g;
kpeter@602:   Digraph::ArcMap<Value> lower(g), cap(g), cost(g);
kpeter@602:   Digraph::NodeMap<Value> sup(g);
kpeter@602:   Timer ti;
kpeter@614: 
kpeter@602:   ti.restart();
kpeter@614:   readDimacsMin(is, g, lower, cap, cost, sup, infty, desc);
kpeter@614:   ti.stop();
kpeter@614:   Value sum_sup = 0;
kpeter@614:   for (Digraph::NodeIt n(g); n != INVALID; ++n) {
kpeter@614:     sum_sup += sup[n];
kpeter@614:   }
kpeter@614:   if (report) {
kpeter@614:     std::cerr << "Sum of supply values: " << sum_sup << "\n";
kpeter@614:     if (sum_sup <= 0)
kpeter@614:       std::cerr << "GEQ supply contraints are used for NetworkSimplex\n\n";
kpeter@614:     else
kpeter@614:       std::cerr << "LEQ supply contraints are used for NetworkSimplex\n\n";
kpeter@614:   }
kpeter@602:   if (report) std::cerr << "Read the file: " << ti << '\n';
kpeter@614: 
kpeter@967:   typedef NetworkSimplex<Digraph, Value> MCF;
kpeter@602:   ti.restart();
kpeter@967:   MCF ns(g);
kpeter@640:   ns.lowerMap(lower).upperMap(cap).costMap(cost).supplyMap(sup);
kpeter@640:   if (sum_sup > 0) ns.supplyType(ns.LEQ);
kpeter@602:   if (report) std::cerr << "Setup NetworkSimplex class: " << ti << '\n';
kpeter@602:   ti.restart();
kpeter@967:   typename MCF::ProblemType res = ns.run();
kpeter@614:   if (report) {
kpeter@614:     std::cerr << "Run NetworkSimplex: " << ti << "\n\n";
kpeter@967:     std::cerr << "Feasible flow: " << (res == MCF::OPTIMAL ? "found" : "not found") << '\n';
kpeter@614:     if (res) std::cerr << "Min flow cost: " << ns.totalCost() << '\n';
kpeter@614:   }
kpeter@602: }
kpeter@602: 
alpar@526: void solve_mat(ArgParser &ap, std::istream &is, std::ostream &,
alpar@526:               DimacsDescriptor &desc)
alpar@526: {
alpar@526:   bool report = !ap.given("q");
alpar@526:   Graph g;
alpar@526:   Timer ti;
alpar@526:   ti.restart();
alpar@526:   readDimacsMat(is, g, desc);
alpar@526:   if(report) std::cerr << "Read the file: " << ti << '\n';
alpar@526:   ti.restart();
alpar@526:   MaxMatching<Graph> mat(g);
alpar@526:   if(report) std::cerr << "Setup MaxMatching class: " << ti << '\n';
alpar@526:   ti.restart();
alpar@526:   mat.run();
alpar@526:   if(report) std::cerr << "Run MaxMatching: " << ti << '\n';
alpar@526:   if(report) std::cerr << "\nCardinality of max matching: "
alpar@526:                        << mat.matchingSize() << '\n';  
alpar@526: }
alpar@526: 
alpar@526: 
alpar@526: template<class Value>
alpar@526: void solve(ArgParser &ap, std::istream &is, std::ostream &os,
alpar@526:            DimacsDescriptor &desc)
alpar@526: {
ladanyi@569:   std::stringstream iss(static_cast<std::string>(ap["infcap"]));
alpar@561:   Value infty;
alpar@561:   iss >> infty;
alpar@561:   if(iss.fail())
alpar@561:     {
alpar@561:       std::cerr << "Cannot interpret '"
alpar@561:                 << static_cast<std::string>(ap["infcap"]) << "' as infinite"
alpar@561:                 << std::endl;
alpar@561:       exit(1);
alpar@561:     }
alpar@561:   
alpar@526:   switch(desc.type)
alpar@526:     {
alpar@526:     case DimacsDescriptor::MIN:
kpeter@614:       solve_min<Value>(ap,is,os,infty,desc);
alpar@526:       break;
alpar@526:     case DimacsDescriptor::MAX:
alpar@561:       solve_max<Value>(ap,is,os,infty,desc);
alpar@526:       break;
alpar@526:     case DimacsDescriptor::SP:
alpar@526:       solve_sp<Value>(ap,is,os,desc);
alpar@526:       break;
alpar@526:     case DimacsDescriptor::MAT:
alpar@526:       solve_mat(ap,is,os,desc);
alpar@526:       break;
alpar@526:     default:
alpar@526:       break;
alpar@526:     }
alpar@526: }
alpar@385: 
alpar@385: int main(int argc, const char *argv[]) {
alpar@385: 
alpar@385:   std::string inputName;
alpar@385:   std::string outputName;
alpar@385: 
alpar@385:   ArgParser ap(argc, argv);
alpar@387:   ap.other("[INFILE [OUTFILE]]",
alpar@387:            "If either the INFILE or OUTFILE file is missing the standard\n"
alpar@387:            "     input/output will be used instead.")
alpar@526:     .boolOption("q", "Do not print any report")
alpar@526:     .boolOption("int","Use 'int' for capacities, costs etc. (default)")
alpar@526:     .optionGroup("datatype","int")
ladanyi@627: #ifdef LEMON_HAVE_LONG_LONG
alpar@526:     .boolOption("long","Use 'long long' for capacities, costs etc.")
alpar@526:     .optionGroup("datatype","long")
alpar@526: #endif
alpar@526:     .boolOption("double","Use 'double' for capacities, costs etc.")
alpar@526:     .optionGroup("datatype","double")
alpar@526:     .boolOption("ldouble","Use 'long double' for capacities, costs etc.")
alpar@526:     .optionGroup("datatype","ldouble")
alpar@526:     .onlyOneGroup("datatype")
alpar@561:     .stringOption("infcap","Value used for 'very high' capacities","0")
alpar@385:     .run();
alpar@385: 
alpar@526:   std::ifstream input;
alpar@526:   std::ofstream output;
alpar@387: 
alpar@387:   switch(ap.files().size())
alpar@387:     {
alpar@387:     case 2:
alpar@387:       output.open(ap.files()[1].c_str());
alpar@387:       if (!output) {
alpar@387:         throw IoError("Cannot open the file for writing", ap.files()[1]);
alpar@387:       }
alpar@387:     case 1:
alpar@387:       input.open(ap.files()[0].c_str());
alpar@387:       if (!input) {
alpar@387:         throw IoError("File cannot be found", ap.files()[0]);
alpar@387:       }
alpar@387:     case 0:
alpar@387:       break;
alpar@387:     default:
alpar@526:       std::cerr << ap.commandName() << ": too many arguments\n";
alpar@387:       return 1;
kpeter@532:     }
alpar@526:   std::istream& is = (ap.files().size()<1 ? std::cin : input);
alpar@526:   std::ostream& os = (ap.files().size()<2 ? std::cout : output);
alpar@387: 
alpar@387:   DimacsDescriptor desc = dimacsType(is);
alpar@526:   
alpar@526:   if(!ap.given("q"))
alpar@387:     {
alpar@526:       std::cout << "Problem type: ";
alpar@526:       switch(desc.type)
alpar@526:         {
alpar@526:         case DimacsDescriptor::MIN:
alpar@526:           std::cout << "min";
alpar@526:           break;
alpar@526:         case DimacsDescriptor::MAX:
alpar@526:           std::cout << "max";
alpar@526:           break;
alpar@526:         case DimacsDescriptor::SP:
alpar@526:           std::cout << "sp";
alpar@526:         case DimacsDescriptor::MAT:
alpar@526:           std::cout << "mat";
alpar@526:           break;
alpar@526:         default:
alpar@526:           exit(1);
alpar@526:           break;
alpar@526:         }
alpar@526:       std::cout << "\nNum of nodes: " << desc.nodeNum;
alpar@526:       std::cout << "\nNum of arcs:  " << desc.edgeNum;
kpeter@532:       std::cout << "\n\n";
alpar@385:     }
alpar@526:     
alpar@526:   if(ap.given("double"))
alpar@526:     solve<double>(ap,is,os,desc);
alpar@526:   else if(ap.given("ldouble"))
alpar@526:     solve<long double>(ap,is,os,desc);
ladanyi@627: #ifdef LEMON_HAVE_LONG_LONG
alpar@526:   else if(ap.given("long"))
alpar@526:     solve<long long>(ap,is,os,desc);
alpar@526: #endif
alpar@526:   else solve<int>(ap,is,os,desc);
alpar@526: 
alpar@385:   return 0;
alpar@385: }