lemon-0.x: src/work/iterator_bfs

     1 // -*- c++ -*-

     2 #include <iostream>

     3 #include <vector>

     4 #include <string>

     6 #include <list_graph.h>

     7 #include <smart_graph.h>

     8 #include <bfs_iterator.h>

     9 #include <graph_wrapper.h>

    11 using namespace hugo;

    12 using std::cout;

    13 using std::endl;

    14 using std::string;

    16 template <typename Graph, typename NodeNameMap>

    17 class EdgeNameMap {

    18   Graph& graph;

    19   NodeNameMap& node_name_map;

    20 public:

    21   EdgeNameMap(Graph& _graph, NodeNameMap& _node_name_map) :

    22     graph(_graph), node_name_map(_node_name_map) { }

    23   string get(typename Graph::Edge e) const {

    24     return

    25       (node_name_map.get(graph.tail(e))+"->"+node_name_map.get(graph.head(e)));

    26   }

    27 };

    29 int main (int, char*[])

    30 {

    31   //typedef SmartGraph Graph;

    32   typedef ListGraph Graph;

    34   typedef Graph::Node Node;

    35   typedef Graph::Edge Edge;

    36   //typedef Graph::NodeIt NodeIt;

    37   //typedef Graph::EdgeIt EdgeIt;

    38   //typedef Graph::OutEdgeIt OutEdgeIt;

    39   //typedef Graph::InEdgeIt InEdgeIt;

    40   //typedef Graph::SymEdgeIt SymEdgeIt;

    42   Graph G;

    44   Node s=G.addNode();

    45   Node v1=G.addNode();

    46   Node v2=G.addNode();

    47   Node v3=G.addNode();

    48   Node v4=G.addNode();

    49   Node t=G.addNode();

    51   Graph::NodeMap<string> node_name(G);

    52   node_name.set(s, "s");

    53   node_name.set(v1, "v1");

    54   node_name.set(v2, "v2");

    55   node_name.set(v3, "v3");

    56   node_name.set(v4, "v4");

    57   node_name.set(t, "t");

    59   G.addEdge(s, v1);

    60   G.addEdge(s, v2);

    61   G.addEdge(v1, v2);

    62   G.addEdge(v2, v1);

    63   G.addEdge(v1, v3);

    64   G.addEdge(v3, v2);

    65   G.addEdge(v2, v4);

    66   G.addEdge(v4, v3);

    67   G.addEdge(v3, t);

    68   G.addEdge(v4, t);

    70   cout << "    /-->    ------------->            "<< endl;

    71   cout << "   / /-- v1 <-\\      /---- v3-\\      "<< endl;

    72   cout << "  / |          |    /  /->     \\     "<< endl;

    73   cout << " /  |          |   /  |    ^    \\  "<< endl;

    74   cout << "s   |          |  /   |    |     \\->  t "<< endl;

    75   cout << " \\  |          | /    |    |     /->  "<< endl;

    76   cout << "  \\ |       --/ /     |    |    /     "<< endl;

    77   cout << "   \\ \\-> v2 <--/       \\-- v4 -/      "<< endl;

    78   cout << "    \\-->    ------------->         "<< endl;

    80 //   typedef TrivGraphWrapper<const Graph> CGW;

    81 //   CGW gw(G);

    83 //   cout << "bfs and dfs demo on the directed graph" << endl;

    84 //   for(CGW::NodeIt n=gw.first<CGW::NodeIt>(); n.valid(); ++n) {

    85 //     cout << n << ": ";

    86 //     cout << "out edges: ";

    87 //     for(CGW::OutEdgeIt e=gw.first<CGW::OutEdgeIt>(n); e.valid(); ++e)

    88 //       cout << e << " ";

    89 //     cout << "in edges: ";

    90 //     for(CGW::InEdgeIt e=gw.first<CGW::InEdgeIt>(n); e.valid(); ++e)

    91 //       cout << e << " ";

    92 //     cout << endl;

    93 //   }

    95   {

    96     typedef TrivGraphWrapper<const Graph> GW;

    97     GW gw(G);

    99     EdgeNameMap< GW, Graph::NodeMap<string> > edge_name(gw, node_name);

   101     cout << "bfs and dfs iterator demo on the directed graph" << endl;

   102     for(GW::NodeIt n=gw.first<GW::NodeIt>();

   103 	gw.valid(n);

   104 	gw.next(n)) {

   105       cout << node_name.get(n) << ": ";

   106       cout << "out edges: ";

   107       for(GW::OutEdgeIt e=gw.first<GW::OutEdgeIt>(n); gw.valid(e); gw.next(e))

   108 	cout << edge_name.get(e) << " ";

   109       cout << "in edges: ";

   110       for(GW::InEdgeIt e=gw.first<GW::InEdgeIt>(n); gw.valid(e); gw.next(e))

   111 	cout << edge_name.get(e) << " ";

   112       cout << endl;

   113     }

   115     cout << "bfs from s ..." << endl;

   116     BfsIterator5< GW, GW::NodeMap<bool> > bfs(gw);

   117     bfs.pushAndSetReached(s);

   118     while (!bfs.finished()) {

   119       //cout << "edge: ";

   120       if (gw.valid(bfs)) {

   121 	cout << edge_name.get(bfs) << /*endl*/", " <<

   122 	  node_name.get(gw.aNode(bfs)) <<

   123 	  (bfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   124 	  node_name.get(gw.bNode(bfs)) <<

   125 	  (bfs.isBNodeNewlyReached() ? ": is newly reached." :

   126 	   ": is not newly reached.");

   127       } else {

   128 	cout << "invalid" << /*endl*/", " <<

   129 	  node_name.get(bfs.aNode()) <<

   130 	  (bfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   132 	  "invalid.";

   133       }

   134       cout << endl;

   135       ++bfs;

   136     }

   138     cout << "    /-->    ------------->            "<< endl;

   139     cout << "   / /-- v1 <-\\      /---- v3-\\      "<< endl;

   140     cout << "  / |          |    /  /->     \\     "<< endl;

   141     cout << " /  |          |   /  |    ^    \\  "<< endl;

   142     cout << "s   |          |  /   |    |     \\->  t "<< endl;

   143     cout << " \\  |          | /    |    |     /->  "<< endl;

   144     cout << "  \\ |       --/ /     |    |    /     "<< endl;

   145     cout << "   \\ \\-> v2 <--/       \\-- v4 -/      "<< endl;

   146     cout << "    \\-->    ------------->         "<< endl;

   148     cout << "dfs from s ..." << endl;

   149     DfsIterator5< GW, GW::NodeMap<bool> > dfs(gw);

   150     dfs.pushAndSetReached(s);

   151     while (!dfs.finished()) {

   152       ++dfs;

   153       //cout << "edge: ";

   154       if (gw.valid(dfs)) {

   155 	cout << edge_name.get(dfs) << /*endl*/", " <<

   156 	  node_name.get(gw.aNode(dfs)) <<

   157 	  (dfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   158 	  node_name.get(gw.bNode(dfs)) <<

   159 	  (dfs.isBNodeNewlyReached() ? ": is newly reached." :

   160 	   ": is not newly reached.");

   161       } else {

   162 	cout << "invalid" << /*endl*/", " <<

   163 	  node_name.get(dfs.aNode()) <<

   164 	  (dfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   166 	  "invalid.";

   167       }

   168       cout << endl;

   169     }

   170   }

   173   {

   174     typedef RevGraphWrapper<const TrivGraphWrapper<const Graph> > GW;

   175     GW gw(G);

   177     EdgeNameMap< GW, Graph::NodeMap<string> > edge_name(gw, node_name);

   179     cout << "bfs and dfs iterator demo on the reversed directed graph" << endl;

   180     for(GW::NodeIt n=gw.first<GW::NodeIt>(); gw.valid(n); gw.next(n)) {

   181       cout << node_name.get(n) << ": ";

   182       cout << "out edges: ";

   183       for(GW::OutEdgeIt e=gw.first<GW::OutEdgeIt>(n); gw.valid(e); gw.next(e))

   184 	cout << edge_name.get(e) << " ";

   185       cout << "in edges: ";

   186       for(GW::InEdgeIt e=gw.first<GW::InEdgeIt>(n); gw.valid(e); gw.next(e))

   187 	cout << edge_name.get(e) << " ";

   188       cout << endl;

   189     }

   191     cout << "bfs from t ..." << endl;

   192     BfsIterator5< GW, GW::NodeMap<bool> > bfs(gw);

   193     bfs.pushAndSetReached(t);

   194     while (!bfs.finished()) {

   195       //cout << "edge: ";

   196       if (gw.valid(bfs)) {

   197 	cout << edge_name.get(bfs) << /*endl*/", " <<

   198 	  node_name.get(gw.aNode(bfs)) <<

   199 	  (bfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   200 	  node_name.get(gw.bNode(bfs)) <<

   201 	  (bfs.isBNodeNewlyReached() ? ": is newly reached." :

   202 	   ": is not newly reached.");

   203       } else {

   204 	cout << "invalid" << /*endl*/", " <<

   205 	  node_name.get(bfs.aNode()) <<

   206 	  (bfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   208 	  "invalid.";

   209       }

   210       cout << endl;

   211       ++bfs;

   212     }

   214     cout << "    /-->    ------------->            "<< endl;

   215     cout << "   / /-- v1 <-\\      /---- v3-\\      "<< endl;

   216     cout << "  / |          |    /  /->     \\     "<< endl;

   217     cout << " /  |          |   /  |    ^    \\  "<< endl;

   218     cout << "s   |          |  /   |    |     \\->  t "<< endl;

   219     cout << " \\  |          | /    |    |     /->  "<< endl;

   220     cout << "  \\ |       --/ /     |    |    /     "<< endl;

   221     cout << "   \\ \\-> v2 <--/       \\-- v4 -/      "<< endl;

   222     cout << "    \\-->    ------------->         "<< endl;

   224     cout << "dfs from t ..." << endl;

   225     DfsIterator5< GW, GW::NodeMap<bool> > dfs(gw);

   226     dfs.pushAndSetReached(t);

   227     while (!dfs.finished()) {

   228       ++dfs;

   229       //cout << "edge: ";

   230       if (gw.valid(dfs)) {

   231 	cout << edge_name.get(dfs) << /*endl*/", " <<

   232 	  node_name.get(gw.aNode(dfs)) <<

   233 	  (dfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   234 	  node_name.get(gw.bNode(dfs)) <<

   235 	  (dfs.isBNodeNewlyReached() ? ": is newly reached." :

   236 	   ": is not newly reached.");

   237       } else {

   238 	cout << "invalid" << /*endl*/", " <<

   239 	  node_name.get(dfs.aNode()) <<

   240 	  (dfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   242 	  "invalid.";

   243       }

   244       cout << endl;

   245     }

   246   }

   248   {

   249     //typedef UndirGraphWrapper<const Graph> GW;

   250     typedef UndirGraphWrapper<const TrivGraphWrapper<const Graph> > GW;

   251     GW gw(G);

   253     EdgeNameMap< GW, Graph::NodeMap<string> > edge_name(gw, node_name);

   255     cout << "bfs and dfs iterator demo on the undirected graph" << endl;

   256     for(GW::NodeIt n=gw.first<GW::NodeIt>(); gw.valid(n); gw.next(n)) {

   257       cout << node_name.get(n) << ": ";

   258       cout << "out edges: ";

   259       for(GW::OutEdgeIt e=gw.first<GW::OutEdgeIt>(n); gw.valid(e); gw.next(e))

   260 	cout << edge_name.get(e) << " ";

   261       cout << "in edges: ";

   262       for(GW::InEdgeIt e=gw.first<GW::InEdgeIt>(n); gw.valid(e); gw.next(e))

   263 	cout << edge_name.get(e) << " ";

   264       cout << endl;

   265     }

   266 //     for(GW::EdgeIt e=gw.first<GW::EdgeIt>(); gw.valid(e); gw.next(e)) {

   267 //       cout << edge_name.get(e) << " ";

   268 //     }

   269 //     cout << endl;

   271     cout << "bfs from t ..." << endl;

   272     BfsIterator5< GW, GW::NodeMap<bool> > bfs(gw);

   273     bfs.pushAndSetReached(t);

   274     while (!bfs.finished()) {

   275       //cout << "edge: ";

   276       if (gw.valid(GW::OutEdgeIt(bfs))) {

   277 	cout << edge_name.get(GW::OutEdgeIt(bfs)) << /*endl*/", " <<

   278 	  node_name.get(gw.aNode(bfs)) <<

   279 	  (bfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   280 	  node_name.get(gw.bNode(bfs)) <<

   281 	  (bfs.isBNodeNewlyReached() ? ": is newly reached." :

   282 	   ": is not newly reached.");

   283       } else {

   284 	cout << "invalid" << /*endl*/", " <<

   285 	  node_name.get(bfs.aNode()) <<

   286 	  (bfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   288 	  "invalid.";

   289       }

   290       cout << endl;

   291       ++bfs;

   292     }

   294     cout << "    /-->    ------------->            "<< endl;

   295     cout << "   / /-- v1 <-\\      /---- v3-\\      "<< endl;

   296     cout << "  / |          |    /  /->     \\     "<< endl;

   297     cout << " /  |          |   /  |    ^    \\  "<< endl;

   298     cout << "s   |          |  /   |    |     \\->  t "<< endl;

   299     cout << " \\  |          | /    |    |     /->  "<< endl;

   300     cout << "  \\ |       --/ /     |    |    /     "<< endl;

   301     cout << "   \\ \\-> v2 <--/       \\-- v4 -/      "<< endl;

   302     cout << "    \\-->    ------------->         "<< endl;

   304     cout << "dfs from t ..." << endl;

   305     DfsIterator5< GW, GW::NodeMap<bool> > dfs(gw);

   306     dfs.pushAndSetReached(t);

   307     while (!dfs.finished()) {

   308       ++dfs;

   309       //cout << "edge: ";

   310       if (gw.valid(GW::OutEdgeIt(dfs))) {

   311 	cout << edge_name.get(GW::OutEdgeIt(dfs)) << /*endl*/", " <<

   312 	  node_name.get(gw.aNode(dfs)) <<

   313 	  (dfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   314 	  node_name.get(gw.bNode(dfs)) <<

   315 	  (dfs.isBNodeNewlyReached() ? ": is newly reached." :

   316 	   ": is not newly reached.");

   317       } else {

   318 	cout << "invalid" << /*endl*/", " <<

   319 	  node_name.get(dfs.aNode()) <<

   320 	  (dfs.isANodeExamined() ? ": is examined, " : ": is not examined, ") <<

   322 	  "invalid.";

   323       }

   324       cout << endl;

   325     }

   326   }

   328   return 0;

   329 }

author	athos
	Fri, 02 Apr 2004 14:53:05 +0000
changeset 276	b38f4cfa76cf
parent 238	ad3bdd78f4f6
child 279	be43902fadb7
permissions	-rw-r--r--