lemon-0.x: src/work/deba/test_graph.h@327f7cf13843

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

     2 #ifndef HUGO_LIST_GRAPH_H

     3 #define HUGO_LIST_GRAPH_H

     5 #include <iostream>

     6 #include <vector>

     8 #include "invalid.h"

    10 #include "vector_map_factory.h"

    12 namespace hugo {

    14   template <typename It>

    15   int count(It it) {

    16     int i=0;

    17     for( ; it.valid(); ++it) { ++i; }

    18     return i;

    19   }

    21   class ListGraph {

    22     class node_item;

    23     class edge_item;

    24   public:

    25     class Node;

    26     class NodeIt;

    27     class Edge;

    28     class EdgeIt;

    29     class OutEdgeIt;

    30     class InEdgeIt;

    31     class SymEdgeIt;

    33 //    template <typename T> class NodeMap;

    34 //    template <typename T> class EdgeMap;

    35   private:

    36 //    template <typename T> friend class NodeMap;

    37  //   template <typename T> friend class EdgeMap;

    39   private:

    42 	public:

    44 		typedef MapBase<ListGraph, Node, NodeIt> NodeMapBase;

    45 		typedef MapRegistry<ListGraph, Node, NodeIt> NodeMapRegistry;

    46 		typedef VectorMapFactory<ListGraph, Node, NodeIt> NodeMapFactory;

    47 		NodeMapRegistry node_maps;

    51 		typedef MapBase<ListGraph, Edge, EdgeIt> EdgeMapBase;

    52 		typedef MapRegistry<ListGraph, Edge, EdgeIt> EdgeMapRegistry;

    53 		typedef VectorMapFactory<ListGraph, Edge, EdgeIt> EdgeMapFactory;

    54 		EdgeMapRegistry edge_maps;

    57     int node_id;

    58     int edge_id;

    59     int _node_num;

    60     int _edge_num;

    62     node_item* _first_node;

    63     node_item* _last_node;

    65     class node_item {

    66       friend class ListGraph;

    67       template <typename T> friend class NodeMap;

    69       friend class Node;

    70       friend class NodeIt;

    71       friend class Edge;

    72       friend class EdgeIt;

    73       friend class OutEdgeIt;

    74       friend class InEdgeIt;

    75       friend class SymEdgeIt;

    76       friend std::ostream& operator<<(std::ostream& os, const Node& i);

    77       friend std::ostream& operator<<(std::ostream& os, const Edge& i);

    78       //ListGraph* G;

    79       int id;

    80       edge_item* _first_out_edge;

    81       edge_item* _last_out_edge;

    82       edge_item* _first_in_edge;

    83       edge_item* _last_in_edge;

    84       node_item* _next_node;

    85       node_item* _prev_node;

    86     public:

    87       node_item() { }

    88     };

    90     class edge_item {

    91       friend class ListGraph;

    92       template <typename T> friend class EdgeMap;

    94       friend class Node;

    95       friend class NodeIt;

    96       friend class Edge;

    97       friend class EdgeIt;

    98       friend class OutEdgeIt;

    99       friend class InEdgeIt;

   100       friend class SymEdgeIt;

   101       friend std::ostream& operator<<(std::ostream& os, const Edge& i);

   102       //ListGraph* G;

   103       int id;

   104       node_item* _tail;

   105       node_item* _head;

   106       edge_item* _next_out;

   107       edge_item* _prev_out;

   108       edge_item* _next_in;

   109       edge_item* _prev_in;

   110     public:

   111       edge_item() { }

   112     };

   114     node_item* _add_node() {

   115       node_item* p=new node_item;

   116       p->id=node_id++;

   117       p->_first_out_edge=0;

   118       p->_last_out_edge=0;

   119       p->_first_in_edge=0;

   120       p->_last_in_edge=0;

   121       p->_prev_node=_last_node;

   122       p->_next_node=0;

   123       if (_last_node) _last_node->_next_node=p;

   124       _last_node=p;

   125       if (!_first_node) _first_node=p;

   127       ++_node_num;

   128       return p;

   129     }

   131     edge_item* _add_edge(node_item* _tail, node_item* _head) {

   132       edge_item* e=new edge_item;

   133       e->id=edge_id++;

   134       e->_tail=_tail;

   135       e->_head=_head;

   137       e->_prev_out=_tail->_last_out_edge;

   138       if (_tail->_last_out_edge) (_tail->_last_out_edge)->_next_out=e;

   139       _tail->_last_out_edge=e;

   140       if (!_tail->_first_out_edge) _tail->_first_out_edge=e;

   141       e->_next_out=0;

   143       e->_prev_in=_head->_last_in_edge;

   144       if (_head->_last_in_edge) (_head->_last_in_edge)->_next_in=e;

   145       _head->_last_in_edge=e;

   146       if (!_head->_first_in_edge) { _head->_first_in_edge=e; }

   147       e->_next_in=0;

   149       ++_edge_num;

   150       return e;

   151     }

   153     //deletes a node which has no out edge and no in edge

   154     void _delete_node(node_item* v) {

   155       if (v->_next_node) (v->_next_node)->_prev_node=v->_prev_node; else

   156 	_last_node=v->_prev_node;

   157       if (v->_prev_node) (v->_prev_node)->_next_node=v->_next_node; else

   158 	_first_node=v->_next_node;

   160       delete v;

   161       --_node_num;

   162     }

   164     void _delete_edge(edge_item* e) {

   165       if (e->_next_out) (e->_next_out)->_prev_out=e->_prev_out; else

   166 	(e->_tail)->_last_out_edge=e->_prev_out;

   167       if (e->_prev_out) (e->_prev_out)->_next_out=e->_next_out; else

   168 	(e->_tail)->_first_out_edge=e->_next_out;

   169       if (e->_next_in) (e->_next_in)->_prev_in=e->_prev_in; else

   170 	(e->_head)->_last_in_edge=e->_prev_in;

   171       if (e->_prev_in) (e->_prev_in)->_next_in=e->_next_in; else

   172 	(e->_head)->_first_in_edge=e->_next_in;

   174       delete e;

   175       --_edge_num;

   176     }

   178     void _set_tail(edge_item* e, node_item* _tail) {

   179       if (e->_next_out) (e->_next_out)->_prev_out=e->_prev_out; else

   180 	(e->_tail)->_last_out_edge=e->_prev_out;

   181       if (e->_prev_out) (e->_prev_out)->_next_out=e->_next_out; else

   182 	(e->_tail)->_first_out_edge=e->_next_out;

   184       e->_tail=_tail;

   186       e->_prev_out=_tail->_last_out_edge;

   187       if (_tail->_last_out_edge) (_tail->_last_out_edge)->_next_out=e;

   188       _tail->_last_out_edge=e;

   189       if (!_tail->_first_out_edge) _tail->_first_out_edge=e;

   190       e->_next_out=0;

   191     }

   193     void _set_head(edge_item* e, node_item* _head) {

   194       if (e->_next_in) (e->_next_in)->_prev_in=e->_prev_in; else

   195 	(e->_head)->_last_in_edge=e->_prev_in;

   196       if (e->_prev_in) (e->_prev_in)->_next_in=e->_next_in; else

   197 	(e->_head)->_first_in_edge=e->_next_in;

   199       e->_head=_head;

   201       e->_prev_in=_head->_last_in_edge;

   202       if (_head->_last_in_edge) (_head->_last_in_edge)->_next_in=e;

   203       _head->_last_in_edge=e;

   204       if (!_head->_first_in_edge) { _head->_first_in_edge=e; }

   205       e->_next_in=0;

   206     }

   208   public:

   210     /* default constructor */

   212     ListGraph() : node_id(0), edge_id(0), _node_num(0), _edge_num(0), _first_node(0), _last_node(0){ }

   214     ~ListGraph() {

   215       while (first<NodeIt>().valid()) erase(first<NodeIt>());

   216     }

   218     int nodeNum() const { return _node_num; }

   219     int edgeNum() const { return _edge_num; }

   221     /* functions to construct iterators from the graph, or from each other */

   223     //NodeIt firstNode() const { return NodeIt(*this); }

   224     //EdgeIt firstEdge() const { return EdgeIt(*this); }

   226     //OutEdgeIt firstOutEdge(const Node v) const { return OutEdgeIt(v); }

   227     //InEdgeIt firstInEdge(const Node v) const { return InEdgeIt(v); }

   228     //SymEdgeIt firstSymEdge(const Node v) const { return SymEdgeIt(v); }

   229     Node tail(Edge e) const { return e.tailNode(); }

   230     Node head(Edge e) const { return e.headNode(); }

   232     Node aNode(const OutEdgeIt& e) const { return e.aNode(); }

   233     Node aNode(const InEdgeIt& e) const { return e.aNode(); }

   234     Node aNode(const SymEdgeIt& e) const { return e.aNode(); }

   236     Node bNode(const OutEdgeIt& e) const { return e.bNode(); }

   237     Node bNode(const InEdgeIt& e) const { return e.bNode(); }

   238     Node bNode(const SymEdgeIt& e) const { return e.bNode(); }

   240     //Node invalid_node() { return Node(); }

   241     //Edge invalid_edge() { return Edge(); }

   242     //OutEdgeIt invalid_out_edge() { return OutEdgeIt(); }

   243     //InEdgeIt invalid_in_edge() { return InEdgeIt(); }

   244     //SymEdgeIt invalid_sym_edge() { return SymEdgeIt(); }

   246     /* same methods in other style */

   247     /* for experimental purpose */

   249     NodeIt& /*getF*/first(NodeIt& v) const {

   250       v=NodeIt(*this); return v; }

   251     EdgeIt& /*getF*/first(EdgeIt& e) const {

   252       e=EdgeIt(*this); return e; }

   253     OutEdgeIt& /*getF*/first(OutEdgeIt& e, Node v) const {

   254       e=OutEdgeIt(*this, v); return e; }

   255     InEdgeIt& /*getF*/first(InEdgeIt& e, Node v) const {

   256       e=InEdgeIt(*this, v); return e; }

   257     SymEdgeIt& /*getF*/first(SymEdgeIt& e, Node v) const {

   258       e=SymEdgeIt(*this, v); return e; }

   259     //void getTail(Node& n, const Edge& e) const { n=tail(e); }

   260     //void getHead(Node& n, const Edge& e) const { n=head(e); }

   262     //void getANode(Node& n, const OutEdgeIt& e) const { n=e.aNode(); }

   263     //void getANode(Node& n, const InEdgeIt& e) const { n=e.aNode(); }

   264     //void getANode(Node& n, const SymEdgeIt& e) const { n=e.aNode(); }

   265     //void getBNode(Node& n, const OutEdgeIt& e) const { n=e.bNode(); }

   266     //void getBNode(Node& n, const InEdgeIt& e) const { n=e.bNode(); }

   267     //void getBNode(Node& n, const SymEdgeIt& e) const { n=e.bNode(); }

   268     //void get_invalid(Node& n) { n=Node(); }

   269     //void get_invalid(Edge& e) { e=Edge(); }

   270     //void get_invalid(OutEdgeIt& e) { e=OutEdgeIt(); }

   271     //void get_invalid(InEdgeIt& e) { e=InEdgeIt(); }

   272     //void get_invalid(SymEdgeIt& e) { e=SymEdgeIt(); }

   274     template< typename It >

   275     It first() const {

   276       It e;

   277       /*getF*/first(e);

   278       return e;

   279     }

   281     template< typename It >

   282     It first(Node v) const {

   283       It e;

   284       /*getF*/first(e, v);

   285       return e;

   286     }

   288     bool valid(Node n) const { return n.valid(); }

   289     bool valid(Edge e) const { return e.valid(); }

   291     template <typename It> It getNext(It it) const {

   292       It tmp(it); return next(tmp); }

   293     template <typename It> It& next(It& it) const { return ++it; }

   296     /* for getting id's of graph objects */

   297     /* these are important for the implementation of property vectors */

   299     int id(Node v) const { return v.node->id; }

   300     int id(Edge e) const { return e.edge->id; }

   302     /* adding nodes and edges */

   304     Node addNode() {

   305 			Node n = _add_node();

   306 			node_maps.add(n);

   307 			return n;

   308 		}

   309     Edge addEdge(Node u, Node v) {

   310 			Edge e = _add_edge(u.node, v.node);

   311 			edge_maps.add(e);

   312       return e;

   313     }

   315     void erase(Node i) {

   316 			node_maps.erase(i);

   317       while (first<OutEdgeIt>(i).valid()) erase(first<OutEdgeIt>(i));

   318       while (first<InEdgeIt>(i).valid()) erase(first<InEdgeIt>(i));

   319       _delete_node(i.node);

   320     }

   322     void erase(Edge e) {

   323 			edge_maps.erase(e);

   324 			_delete_edge(e.edge);

   325 		}

   327     void clear() {

   328       while (first<NodeIt>().valid()) erase(first<NodeIt>());

   329     }

   331     void setTail(Edge e, Node tail) {

   332       _set_tail(e.edge, tail.node);

   333     }

   335     void setHead(Edge e, Node head) {

   336       _set_head(e.edge, head.node);

   337     }

   339     /* stream operations, for testing purpose */

   341     friend std::ostream& operator<<(std::ostream& os, const Node& i) {

   342       os << i.node->id; return os;

   343     }

   344     friend std::ostream& operator<<(std::ostream& os, const Edge& i) {

   345       os << "(" << i.edge->_tail->id << "--" << i.edge->id << "->" << i.edge->_head->id << ")";

   346       return os;

   347     }

   349     class Node {

   350       friend class ListGraph;

   351       template <typename T> friend class NodeMap;

   353       friend class Edge;

   354       friend class OutEdgeIt;

   355       friend class InEdgeIt;

   356       friend class SymEdgeIt;

   357       //public:  //FIXME: It is required by op= of NodeIt

   358     protected:

   359       node_item* node;

   360     protected:

   361       friend int ListGraph::id(Node v) const;

   362     public:

   363       Node() /*: node(0)*/ { }

   364       Node(const Invalid&) : node(0) { }

   365     protected:

   366       Node(node_item* _node) : node(_node) { }

   367       bool valid() const { return (node); }

   368     public:

   369       //void makeInvalid() { node=0; }

   370       friend bool operator==(Node u, Node v) { return v.node==u.node; }

   371       friend bool operator!=(Node u, Node v) { return v.node!=u.node; }

   372       friend std::ostream& operator<<(std::ostream& os, const Node& i);

   373     };

   375     class NodeIt : public Node {

   376       friend class ListGraph;

   377       //protected:

   378     public: //for everybody but marci

   379       NodeIt(const ListGraph& G) : Node(G._first_node) { }

   380     public:

   381       NodeIt() : Node() { }

   382       NodeIt(const Invalid& i) : Node(i) { }

   383     protected:

   384       NodeIt(node_item* v) : Node(v) { }

   385       NodeIt& operator++() { node=node->_next_node; return *this; }

   386       //FIXME::

   387       //      NodeIt& operator=(const Node& e)

   388       //      { node=e.node; return *this; }

   389     };

   391     class Edge {

   392       friend class ListGraph;

   393       template <typename T> friend class EdgeMap;

   395       friend class Node;

   396       friend class NodeIt;

   397     protected:

   398       edge_item* edge;

   399       friend int ListGraph::id(Edge e) const;

   400     public:

   401       Edge() /*: edge(0)*/ { }

   402       Edge(const Invalid&) : edge(0) { }

   403       //Edge() { }

   404     protected:

   405       Edge(edge_item* _edge) : edge(_edge) { }

   406       bool valid() const { return (edge); }

   407     public:

   408       //void makeInvalid() { edge=0; }

   409       friend bool operator==(Edge u, Edge v) { return v.edge==u.edge; }

   410       friend bool operator!=(Edge u, Edge v) { return v.edge!=u.edge; }

   411     protected:

   412       Node tailNode() const { return Node(edge->_tail); }

   413       Node headNode() const { return Node(edge->_head); }

   414     public:

   415       friend std::ostream& operator<<(std::ostream& os, const Edge& i);

   416     };

   418     class EdgeIt : public Edge {

   419       friend class ListGraph;

   420       //protected:

   421     public: //for alpar

   422       EdgeIt(const ListGraph& G) {

   423 	node_item* v=G._first_node;

   424 	if (v) edge=v->_first_out_edge; else edge=0;

   425 	while (v && !edge) { v=v->_next_node; if (v) edge=v->_first_out_edge; }

   426       }

   427     public:

   428       EdgeIt() : Edge() { }

   429       EdgeIt(const Invalid& i) : Edge(i) { }

   430     protected:

   431       EdgeIt(edge_item* _e) : Edge(_e) { }

   432       EdgeIt& operator++() {

   433 	node_item* v=edge->_tail;

   434 	edge=edge->_next_out;

   435 	while (v && !edge) { v=v->_next_node; if (v) edge=v->_first_out_edge; }

   436 	return *this;

   437       }

   438     };

   440     class OutEdgeIt : public Edge {

   441       friend class ListGraph;

   442       //node_item* v;

   443       //protected:

   444     protected: //for alpar

   445       OutEdgeIt(const Node& _v) /*: v(_v.node)*/ { edge=_v.node->_first_out_edge; }

   446     public:

   447       OutEdgeIt() : Edge()/*, v(0)*/ { }

   448       OutEdgeIt(const Invalid& i) : Edge(i) { }

   449       OutEdgeIt(const ListGraph&, Node _v) /*: v(_v.node)*/ { edge=_v.node->_first_out_edge; }

   450     protected:

   451       OutEdgeIt& operator++() { edge=edge->_next_out; return *this; }

   452     protected:

   453       Node aNode() const { return Node(edge->_tail); }

   454       Node bNode() const { return Node(edge->_head); }

   455     };

   457     class InEdgeIt : public Edge {

   458       friend class ListGraph;

   459       //node_item* v;

   460       //protected:

   461     protected: //for alpar

   462       InEdgeIt(const Node& _v) /*: v(_v.node)*/ { edge=_v.node->_first_in_edge; }

   463     public:

   464       InEdgeIt() : Edge()/*, v(0)*/ { }

   465       InEdgeIt(const Invalid& i) : Edge(i) { }

   466       InEdgeIt(const ListGraph&, Node _v) /*: v(_v.node)*/ { edge=_v.node->_first_in_edge; }

   467     protected:

   468       InEdgeIt& operator++() { edge=edge->_next_in; return *this; }

   469     protected:

   470       Node aNode() const { return Node(edge->_head); }

   471       Node bNode() const { return Node(edge->_tail); }

   472     };

   474     class SymEdgeIt : public Edge {

   475       friend class ListGraph;

   476       bool out_or_in; //1 iff out, 0 iff in

   477       //node_item* v;

   478       //protected:

   479     public: //for alpar

   480       SymEdgeIt(const Node& _v) /*: v(_v.node)*/ {

   481 	out_or_in=1;

   482 	edge=_v.node->_first_out_edge;

   483 	if (!edge) { edge=_v.node->_first_in_edge; out_or_in=0; }

   484       }

   485     public:

   486       SymEdgeIt() : Edge() /*, v(0)*/ { }

   487       SymEdgeIt(const Invalid& i) : Edge(i) { }

   488       SymEdgeIt(const ListGraph&, Node _v) /*: v(_v.node)*/ {

   489 	out_or_in=1;

   490 	edge=_v.node->_first_out_edge;

   491 	if (!edge) { edge=_v.node->_first_in_edge; out_or_in=0; }

   492       }

   493     protected:

   494       SymEdgeIt& operator++() {

   495 	if (out_or_in) {

   496 	  node_item* v=edge->_tail;

   497 	  edge=edge->_next_out;

   498 	  if (!edge) { out_or_in=0; edge=v->_first_in_edge; }

   499 	} else {

   500 	  edge=edge->_next_in;

   501 	}

   502 	return *this;

   503       }

   504     protected:

   505       Node aNode() const {

   506 	return (out_or_in) ? Node(edge->_tail) : Node(edge->_head); }

   507       Node bNode() const {

   508 	return (out_or_in) ? Node(edge->_head) : Node(edge->_tail); }

   509     };

   511   };

   513 //   template< typename T >

   514 //   T ListGraph::first() const {

   515 //     std::cerr << "Invalid use of template<typemane T> T ListGraph::first<T>();" << std::endl;

   516 //     return T();

   517 //   }

   519 //   template<>

   520 //   ListGraph::NodeIt ListGraph::first<ListGraph::NodeIt>() const {

   521 //     return firstNode();

   522 //   }

   524 //   template<>

   525 //   ListGraph::EdgeIt ListGraph::first<ListGraph::EdgeIt>() const {

   526 //     return firstEdge();

   527 //   }

   529 //   template< typename T >

   530 //   T ListGraph::first(ListGraph::Node v) const {

   531 //     std::cerr << "Invalid use of template<typemane T> T ListGraph::first<T>(ListGRaph::Node);" << std::endl;

   532 //     return T();

   533 //   }

   535 //   template<>

   536 //   ListGraph::OutEdgeIt ListGraph::first<ListGraph::OutEdgeIt>(const ListGraph::Node v) const {

   537 //     return firstOutEdge(v);

   538 //   }

   540 //   template<>

   541 //   ListGraph::InEdgeIt ListGraph::first<ListGraph::InEdgeIt>(const ListGraph::Node v) const {

   542 //     return firstInEdge(v);

   543 //   }

   545 //   template<>

   546 //   ListGraph::SymEdgeIt ListGraph::first<ListGraph::SymEdgeIt>(const ListGraph::Node v) const {

   547 //     return firstSymEdge(v);

   548 //   }

   551 } //namespace hugo

   553 #endif //HUGO_LIST_GRAPH_H

author	athos
	Tue, 11 May 2004 15:42:11 +0000
changeset 607	327f7cf13843
parent 571	9632ea8be6ca
child 627	6cc21a9c9fda
permissions	-rw-r--r--