src/demo/dim_to_lgf.cc
author deba
Mon, 04 Apr 2005 10:11:47 +0000
changeset 1296 12078ddcf065
permissions -rw-r--r--
dimacs_to_lgf demo
may we need a tools directory?
     1 #include <iostream>
     2 #include <fstream>
     3 #include <cstring>
     4 
     5 #include <lemon/smart_graph.h>
     6 #include <lemon/dimacs.h>
     7 #include <lemon/graph_writer.h>
     8 
     9 using namespace std;
    10 using namespace lemon;
    11 
    12 const char* versionString =
    13 "dim_to_lgf - part of lemon library\n";
    14 
    15 const char* helpString =
    16 "Dimacs to LGF converter\n"
    17 "Usage: dim_to_lgf [OPTIONS]\n"
    18 "\n"
    19 "Examples:\n"
    20 "  dim_to_lgf --type shortestpath --input graph.dim --output graph.lgf\n"
    21 "\n"
    22 "Options:\n"
    23 "  -i FILE, --input FILE    use FILE as input instead of standard input\n"
    24 "  -o FILE, --output FILE   use FILE as output instead of standard output\n"
    25 "  -t TYPE, --type TYPE     set up the type of the graph\n"
    26 "                             Possible types:\n"
    27 "                               mincostflow\n"
    28 "                               maxflow (default)\n"
    29 "                               shortestpath\n"
    30 "                               capacitated\n"
    31 "                               plain\n"
    32 "  -v, --version            shows the version of the converter\n"
    33 "  -h, --help               shows the help of the converter\n";
    34 
    35 
    36 int main(int argc, const char *argv[]) {
    37   typedef SmartGraph Graph;
    38 
    39   typedef Graph::Edge Edge;
    40   typedef Graph::Node Node;
    41   typedef Graph::EdgeIt EdgeIt;
    42   typedef Graph::NodeIt NodeIt;
    43   typedef Graph::EdgeMap<string> StringMap;
    44 
    45   std::string inputName;
    46   std::string outputName;
    47   std::string typeName;
    48 
    49   bool help = false;
    50   bool version = false;
    51 
    52   for (int arg = 1; arg < argc; ++arg) {
    53     if (strcmp(argv[arg], "--type") == 0 || 
    54 	strcmp(argv[arg], "-t") == 0) {
    55       if (!typeName.empty()) {
    56 	cerr << "Multiple type description" << endl;
    57 	return -1;
    58       }
    59       if (arg + 1 == argc) {
    60 	cerr << "Parameter without value" << endl;
    61 	return -1;
    62       }
    63       typeName = argv[++arg];
    64     }
    65     else if (strcmp(argv[arg], "--input") == 0 || 
    66 	     strcmp(argv[arg], "-i") == 0) {
    67       if (!inputName.empty()) {
    68 	cerr << "Multiple input description" << endl;
    69 	return -1;
    70       }
    71       if (arg + 1 == argc) {
    72 	cerr << "Parameter without value" << endl;
    73 	return -1;
    74       }
    75       inputName = argv[++arg];
    76     }
    77     else if (strcmp(argv[arg], "--output") == 0 || 
    78 	     strcmp(argv[arg], "-o") == 0) {
    79       if (!outputName.empty()) {
    80 	cerr << "Multiple input description" << endl;
    81 	return -1;
    82       }
    83       if (arg + 1 == argc) {
    84 	cerr << "Parameter without value" << endl;
    85 	return -1;
    86       }
    87       outputName = argv[++arg];
    88     } else if (strcmp(argv[arg], "--help") == 0 ||
    89 	       strcmp(argv[arg], "-h") == 0) {
    90       help = true;
    91     } else if (strcmp(argv[arg], "--version") == 0 ||
    92 	       strcmp(argv[arg], "-v") == 0) {
    93       version = true;
    94     } else {
    95       cerr << "Invalid option: " << argv[arg] << endl;
    96       return -1;
    97     }
    98   }
    99 
   100   if (version) {
   101     cout << versionString;
   102   }
   103   if (help) {
   104     cout << helpString;
   105   }
   106   if (help || version) {
   107     return 0;
   108   }
   109 
   110   ifstream input;
   111   if (!inputName.empty()) {
   112     input.open(inputName.c_str());
   113     if (!input) {
   114       cerr << "File open error" << endl;
   115       return -1;
   116     }
   117   }
   118   istream& is = (inputName.empty() ? cin : input);
   119 
   120   ofstream output;
   121   if (!outputName.empty()) {
   122     output.open(outputName.c_str());
   123     if (!output) {
   124       cerr << "File open error" << endl;
   125       return -1;
   126     }
   127   }
   128   ostream& os = (outputName.empty() ? cout : output);
   129 
   130   if (typeName.empty()) {
   131     typeName = "maxflow";
   132   }
   133 
   134   if (typeName == "mincostflow") {
   135     Graph graph;
   136     Node s, t;
   137     StringMap cost(graph), capacity(graph);
   138     readDimacs(is, graph, capacity, s, t, cost);
   139     writeGraph(os, graph, capacity, s, t, cost);
   140   } else if (typeName == "maxflow") {
   141     Graph graph;
   142     Node s, t;
   143     StringMap capacity(graph);
   144     readDimacs(is, graph, capacity, s, t);
   145     writeGraph(os, graph, capacity, s, t);
   146   } else if (typeName == "shortestpath") {
   147     Graph graph;
   148     Node s;
   149     StringMap capacity(graph);
   150     readDimacs(is, graph, capacity, s);
   151     writeGraph(os, graph, capacity, s);
   152   } else if (typeName == "capacitated") {
   153     Graph graph;
   154     StringMap capacity(graph);
   155     readDimacs(is, graph, capacity);
   156     writeGraph(os, graph, capacity);
   157   } else if (typeName == "plain") {
   158     Graph graph;
   159     readDimacs(is, graph);
   160     writeGraph(os, graph);
   161   } else {
   162     cerr << "Invalid type error" << endl;
   163     return -1;
   164   }
   165   return 0;
   166 }