tools/dimacs-solver.cc
author Akos Ladanyi <ladanyi@tmit.bme.hu>
Thu, 23 Apr 2009 07:30:40 +0100
changeset 621 b536eaacb39b
parent 594 d657c71db7db
parent 605 5232721b3f14
child 614 19b6f20e0ea2
permissions -rw-r--r--
FindCOIN for CMake (#256)
alpar@385
     1
/* -*- mode: C++; indent-tabs-mode: nil; -*-
alpar@385
     2
 *
alpar@385
     3
 * This file is a part of LEMON, a generic C++ optimization library.
alpar@385
     4
 *
alpar@440
     5
 * Copyright (C) 2003-2009
alpar@385
     6
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@385
     7
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
alpar@385
     8
 *
alpar@385
     9
 * Permission to use, modify and distribute this software is granted
alpar@385
    10
 * provided that this copyright notice appears in all copies. For
alpar@385
    11
 * precise terms see the accompanying LICENSE file.
alpar@385
    12
 *
alpar@385
    13
 * This software is provided "AS IS" with no warranty of any kind,
alpar@385
    14
 * express or implied, and with no claim as to its suitability for any
alpar@385
    15
 * purpose.
alpar@385
    16
 *
alpar@385
    17
 */
alpar@385
    18
alpar@385
    19
///\ingroup tools
alpar@385
    20
///\file
kpeter@532
    21
///\brief DIMACS problem solver.
alpar@385
    22
///
kpeter@532
    23
/// This program solves various problems given in DIMACS format.
alpar@385
    24
///
alpar@385
    25
/// See
kpeter@584
    26
/// \code
kpeter@584
    27
///   dimacs-solver --help
kpeter@584
    28
/// \endcode
alpar@385
    29
/// for more info on usage.
alpar@385
    30
alpar@385
    31
#include <iostream>
alpar@385
    32
#include <fstream>
alpar@385
    33
#include <cstring>
alpar@385
    34
alpar@385
    35
#include <lemon/smart_graph.h>
alpar@385
    36
#include <lemon/dimacs.h>
alpar@385
    37
#include <lemon/lgf_writer.h>
alpar@526
    38
#include <lemon/time_measure.h>
alpar@385
    39
alpar@385
    40
#include <lemon/arg_parser.h>
alpar@387
    41
#include <lemon/error.h>
alpar@385
    42
alpar@526
    43
#include <lemon/dijkstra.h>
alpar@526
    44
#include <lemon/preflow.h>
kpeter@594
    45
#include <lemon/matching.h>
kpeter@602
    46
#include <lemon/network_simplex.h>
alpar@526
    47
alpar@385
    48
using namespace lemon;
alpar@526
    49
typedef SmartDigraph Digraph;
alpar@526
    50
DIGRAPH_TYPEDEFS(Digraph);
alpar@526
    51
typedef SmartGraph Graph;
alpar@385
    52
alpar@526
    53
template<class Value>
alpar@526
    54
void solve_sp(ArgParser &ap, std::istream &is, std::ostream &,
alpar@526
    55
              DimacsDescriptor &desc)
alpar@526
    56
{
alpar@526
    57
  bool report = !ap.given("q");
alpar@526
    58
  Digraph g;
alpar@526
    59
  Node s;
alpar@526
    60
  Digraph::ArcMap<Value> len(g);
alpar@526
    61
  Timer t;
alpar@526
    62
  t.restart();
alpar@526
    63
  readDimacsSp(is, g, len, s, desc);
alpar@526
    64
  if(report) std::cerr << "Read the file: " << t << '\n';
alpar@526
    65
  t.restart();
alpar@526
    66
  Dijkstra<Digraph, Digraph::ArcMap<Value> > dij(g,len);
alpar@526
    67
  if(report) std::cerr << "Setup Dijkstra class: " << t << '\n';
alpar@526
    68
  t.restart();
alpar@526
    69
  dij.run(s);
alpar@526
    70
  if(report) std::cerr << "Run Dijkstra: " << t << '\n';
alpar@526
    71
}
alpar@526
    72
alpar@526
    73
template<class Value>
alpar@526
    74
void solve_max(ArgParser &ap, std::istream &is, std::ostream &,
alpar@561
    75
               Value infty, DimacsDescriptor &desc)
alpar@526
    76
{
alpar@526
    77
  bool report = !ap.given("q");
alpar@526
    78
  Digraph g;
alpar@526
    79
  Node s,t;
alpar@526
    80
  Digraph::ArcMap<Value> cap(g);
alpar@526
    81
  Timer ti;
alpar@526
    82
  ti.restart();
alpar@561
    83
  readDimacsMax(is, g, cap, s, t, infty, desc);
alpar@526
    84
  if(report) std::cerr << "Read the file: " << ti << '\n';
alpar@526
    85
  ti.restart();
alpar@526
    86
  Preflow<Digraph, Digraph::ArcMap<Value> > pre(g,cap,s,t);
alpar@526
    87
  if(report) std::cerr << "Setup Preflow class: " << ti << '\n';
alpar@526
    88
  ti.restart();
alpar@526
    89
  pre.run();
alpar@526
    90
  if(report) std::cerr << "Run Preflow: " << ti << '\n';
alpar@526
    91
  if(report) std::cerr << "\nMax flow value: " << pre.flowValue() << '\n';  
alpar@526
    92
}
alpar@526
    93
kpeter@602
    94
template<class Value>
kpeter@602
    95
void solve_min(ArgParser &ap, std::istream &is, std::ostream &,
kpeter@602
    96
               DimacsDescriptor &desc)
kpeter@602
    97
{
kpeter@602
    98
  bool report = !ap.given("q");
kpeter@602
    99
  Digraph g;
kpeter@602
   100
  Digraph::ArcMap<Value> lower(g), cap(g), cost(g);
kpeter@602
   101
  Digraph::NodeMap<Value> sup(g);
kpeter@602
   102
  Timer ti;
kpeter@602
   103
  ti.restart();
alpar@611
   104
  readDimacsMin(is, g, lower, cap, cost, sup, 0, desc);
kpeter@602
   105
  if (report) std::cerr << "Read the file: " << ti << '\n';
kpeter@602
   106
  ti.restart();
kpeter@605
   107
  NetworkSimplex<Digraph, Value> ns(g);
kpeter@605
   108
  ns.lowerMap(lower).capacityMap(cap).costMap(cost).supplyMap(sup);
kpeter@602
   109
  if (report) std::cerr << "Setup NetworkSimplex class: " << ti << '\n';
kpeter@602
   110
  ti.restart();
kpeter@602
   111
  ns.run();
kpeter@602
   112
  if (report) std::cerr << "Run NetworkSimplex: " << ti << '\n';
kpeter@602
   113
  if (report) std::cerr << "\nMin flow cost: " << ns.totalCost() << '\n';
kpeter@602
   114
}
kpeter@602
   115
alpar@526
   116
void solve_mat(ArgParser &ap, std::istream &is, std::ostream &,
alpar@526
   117
              DimacsDescriptor &desc)
alpar@526
   118
{
alpar@526
   119
  bool report = !ap.given("q");
alpar@526
   120
  Graph g;
alpar@526
   121
  Timer ti;
alpar@526
   122
  ti.restart();
alpar@526
   123
  readDimacsMat(is, g, desc);
alpar@526
   124
  if(report) std::cerr << "Read the file: " << ti << '\n';
alpar@526
   125
  ti.restart();
alpar@526
   126
  MaxMatching<Graph> mat(g);
alpar@526
   127
  if(report) std::cerr << "Setup MaxMatching class: " << ti << '\n';
alpar@526
   128
  ti.restart();
alpar@526
   129
  mat.run();
alpar@526
   130
  if(report) std::cerr << "Run MaxMatching: " << ti << '\n';
alpar@526
   131
  if(report) std::cerr << "\nCardinality of max matching: "
alpar@526
   132
                       << mat.matchingSize() << '\n';  
alpar@526
   133
}
alpar@526
   134
alpar@526
   135
alpar@526
   136
template<class Value>
alpar@526
   137
void solve(ArgParser &ap, std::istream &is, std::ostream &os,
alpar@526
   138
           DimacsDescriptor &desc)
alpar@526
   139
{
ladanyi@569
   140
  std::stringstream iss(static_cast<std::string>(ap["infcap"]));
alpar@561
   141
  Value infty;
alpar@561
   142
  iss >> infty;
alpar@561
   143
  if(iss.fail())
alpar@561
   144
    {
alpar@561
   145
      std::cerr << "Cannot interpret '"
alpar@561
   146
                << static_cast<std::string>(ap["infcap"]) << "' as infinite"
alpar@561
   147
                << std::endl;
alpar@561
   148
      exit(1);
alpar@561
   149
    }
alpar@561
   150
  
alpar@526
   151
  switch(desc.type)
alpar@526
   152
    {
alpar@526
   153
    case DimacsDescriptor::MIN:
kpeter@602
   154
      solve_min<Value>(ap,is,os,desc);
alpar@526
   155
      break;
alpar@526
   156
    case DimacsDescriptor::MAX:
alpar@561
   157
      solve_max<Value>(ap,is,os,infty,desc);
alpar@526
   158
      break;
alpar@526
   159
    case DimacsDescriptor::SP:
alpar@526
   160
      solve_sp<Value>(ap,is,os,desc);
alpar@526
   161
      break;
alpar@526
   162
    case DimacsDescriptor::MAT:
alpar@526
   163
      solve_mat(ap,is,os,desc);
alpar@526
   164
      break;
alpar@526
   165
    default:
alpar@526
   166
      break;
alpar@526
   167
    }
alpar@526
   168
}
alpar@385
   169
alpar@385
   170
int main(int argc, const char *argv[]) {
alpar@385
   171
  typedef SmartDigraph Digraph;
alpar@385
   172
alpar@385
   173
  typedef Digraph::Arc Arc;
alpar@385
   174
alpar@385
   175
  std::string inputName;
alpar@385
   176
  std::string outputName;
alpar@385
   177
alpar@385
   178
  ArgParser ap(argc, argv);
alpar@387
   179
  ap.other("[INFILE [OUTFILE]]",
alpar@387
   180
           "If either the INFILE or OUTFILE file is missing the standard\n"
alpar@387
   181
           "     input/output will be used instead.")
alpar@526
   182
    .boolOption("q", "Do not print any report")
alpar@526
   183
    .boolOption("int","Use 'int' for capacities, costs etc. (default)")
alpar@526
   184
    .optionGroup("datatype","int")
alpar@526
   185
#ifdef HAVE_LONG_LONG
alpar@526
   186
    .boolOption("long","Use 'long long' for capacities, costs etc.")
alpar@526
   187
    .optionGroup("datatype","long")
alpar@526
   188
#endif
alpar@526
   189
    .boolOption("double","Use 'double' for capacities, costs etc.")
alpar@526
   190
    .optionGroup("datatype","double")
alpar@526
   191
    .boolOption("ldouble","Use 'long double' for capacities, costs etc.")
alpar@526
   192
    .optionGroup("datatype","ldouble")
alpar@526
   193
    .onlyOneGroup("datatype")
alpar@561
   194
    .stringOption("infcap","Value used for 'very high' capacities","0")
alpar@385
   195
    .run();
alpar@385
   196
alpar@526
   197
  std::ifstream input;
alpar@526
   198
  std::ofstream output;
alpar@387
   199
alpar@387
   200
  switch(ap.files().size())
alpar@387
   201
    {
alpar@387
   202
    case 2:
alpar@387
   203
      output.open(ap.files()[1].c_str());
alpar@387
   204
      if (!output) {
alpar@387
   205
        throw IoError("Cannot open the file for writing", ap.files()[1]);
alpar@387
   206
      }
alpar@387
   207
    case 1:
alpar@387
   208
      input.open(ap.files()[0].c_str());
alpar@387
   209
      if (!input) {
alpar@387
   210
        throw IoError("File cannot be found", ap.files()[0]);
alpar@387
   211
      }
alpar@387
   212
    case 0:
alpar@387
   213
      break;
alpar@387
   214
    default:
alpar@526
   215
      std::cerr << ap.commandName() << ": too many arguments\n";
alpar@387
   216
      return 1;
kpeter@532
   217
    }
alpar@526
   218
  std::istream& is = (ap.files().size()<1 ? std::cin : input);
alpar@526
   219
  std::ostream& os = (ap.files().size()<2 ? std::cout : output);
alpar@387
   220
alpar@387
   221
  DimacsDescriptor desc = dimacsType(is);
alpar@526
   222
  
alpar@526
   223
  if(!ap.given("q"))
alpar@387
   224
    {
alpar@526
   225
      std::cout << "Problem type: ";
alpar@526
   226
      switch(desc.type)
alpar@526
   227
        {
alpar@526
   228
        case DimacsDescriptor::MIN:
alpar@526
   229
          std::cout << "min";
alpar@526
   230
          break;
alpar@526
   231
        case DimacsDescriptor::MAX:
alpar@526
   232
          std::cout << "max";
alpar@526
   233
          break;
alpar@526
   234
        case DimacsDescriptor::SP:
alpar@526
   235
          std::cout << "sp";
alpar@526
   236
        case DimacsDescriptor::MAT:
alpar@526
   237
          std::cout << "mat";
alpar@526
   238
          break;
alpar@526
   239
        default:
alpar@526
   240
          exit(1);
alpar@526
   241
          break;
alpar@526
   242
        }
alpar@526
   243
      std::cout << "\nNum of nodes: " << desc.nodeNum;
alpar@526
   244
      std::cout << "\nNum of arcs:  " << desc.edgeNum;
kpeter@532
   245
      std::cout << "\n\n";
alpar@385
   246
    }
alpar@526
   247
    
alpar@526
   248
  if(ap.given("double"))
alpar@526
   249
    solve<double>(ap,is,os,desc);
alpar@526
   250
  else if(ap.given("ldouble"))
alpar@526
   251
    solve<long double>(ap,is,os,desc);
alpar@526
   252
#ifdef HAVE_LONG_LONG
alpar@526
   253
  else if(ap.given("long"))
alpar@526
   254
    solve<long long>(ap,is,os,desc);
alpar@526
   255
#endif
alpar@526
   256
  else solve<int>(ap,is,os,desc);
alpar@526
   257
alpar@385
   258
  return 0;
alpar@385
   259
}