lemon-0.x: src/work/deba/test_graph.h@f92099d27236

     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.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:

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

    42 		NodeMapRegistry node_maps;

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

    45 		EdgeMapRegistry edge_maps;

    47 	public:

    50     template <typename T>

    51     class NodeMap : public VectorMap<ListGraph, Node, NodeIt, T> {

    52 		public:

    53 			NodeMap(ListGraph& g) : VectorMap<ListGraph, Node, NodeIt, T>(g.node_maps) {}

    54 		};

    56     template <typename T>

    57     class EdgeMap : public VectorMap<ListGraph, Edge, EdgeIt, T> {

    58 		public:

    59 			EdgeMap(ListGraph& g) : VectorMap<ListGraph, Edge, EdgeIt, T>(g.edge_maps) {}

    60 		};

    63     int node_id;

    64     int edge_id;

    65     int _node_num;

    66     int _edge_num;

    68     node_item* _first_node;

    69     node_item* _last_node;

    71     class node_item {

    72       friend class ListGraph;

    73       template <typename T> friend class NodeMap;

    75       friend class Node;

    76       friend class NodeIt;

    77       friend class Edge;

    78       friend class EdgeIt;

    79       friend class OutEdgeIt;

    80       friend class InEdgeIt;

    81       friend class SymEdgeIt;

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

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

    84       //ListGraph* G;

    85       int id;

    86       edge_item* _first_out_edge;

    87       edge_item* _last_out_edge;

    88       edge_item* _first_in_edge;

    89       edge_item* _last_in_edge;

    90       node_item* _next_node;

    91       node_item* _prev_node;

    92     public:

    93       node_item() { }

    94     };

    96     class edge_item {

    97       friend class ListGraph;

    98       template <typename T> friend class EdgeMap;

   100       friend class Node;

   101       friend class NodeIt;

   102       friend class Edge;

   103       friend class EdgeIt;

   104       friend class OutEdgeIt;

   105       friend class InEdgeIt;

   106       friend class SymEdgeIt;

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

   108       //ListGraph* G;

   109       int id;

   110       node_item* _tail;

   111       node_item* _head;

   112       edge_item* _next_out;

   113       edge_item* _prev_out;

   114       edge_item* _next_in;

   115       edge_item* _prev_in;

   116     public:

   117       edge_item() { }

   118     };

   120     node_item* _add_node() {

   121       node_item* p=new node_item;

   122       p->id=node_id++;

   123       p->_first_out_edge=0;

   124       p->_last_out_edge=0;

   125       p->_first_in_edge=0;

   126       p->_last_in_edge=0;

   127       p->_prev_node=_last_node;

   128       p->_next_node=0;

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

   130       _last_node=p;

   131       if (!_first_node) _first_node=p;

   133       ++_node_num;

   134       return p;

   135     }

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

   138       edge_item* e=new edge_item;

   139       e->id=edge_id++;

   140       e->_tail=_tail;

   141       e->_head=_head;

   143       e->_prev_out=_tail->_last_out_edge;

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

   145       _tail->_last_out_edge=e;

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

   147       e->_next_out=0;

   149       e->_prev_in=_head->_last_in_edge;

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

   151       _head->_last_in_edge=e;

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

   153       e->_next_in=0;

   155       ++_edge_num;

   156       return e;

   157     }

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

   160     void _delete_node(node_item* v) {

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

   162 	_last_node=v->_prev_node;

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

   164 	_first_node=v->_next_node;

   166       delete v;

   167       --_node_num;

   168     }

   170     void _delete_edge(edge_item* e) {

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

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

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

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

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

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

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

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

   180       delete e;

   181       --_edge_num;

   182     }

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

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

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

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

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

   190       e->_tail=_tail;

   192       e->_prev_out=_tail->_last_out_edge;

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

   194       _tail->_last_out_edge=e;

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

   196       e->_next_out=0;

   197     }

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

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

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

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

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

   205       e->_head=_head;

   207       e->_prev_in=_head->_last_in_edge;

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

   209       _head->_last_in_edge=e;

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

   211       e->_next_in=0;

   212     }

   214   public:

   216     /* default constructor */

   218     ListGraph() : node_id(0), edge_id(0), _node_num(0), _edge_num(0), _first_node(0), _last_node(0),

   219 			edge_maps(*this), node_maps(*this) { }

   221     ~ListGraph() {

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

   223     }

   225     int nodeNum() const { return _node_num; }

   226     int edgeNum() const { return _edge_num; }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   253     /* same methods in other style */

   254     /* for experimental purpose */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   281     template< typename It >

   282     It first() const {

   283       It e;

   284       /*getF*/first(e);

   285       return e;

   286     }

   288     template< typename It >

   289     It first(Node v) const {

   290       It e;

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

   292       return e;

   293     }

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

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

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

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

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

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

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

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

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

   309     /* adding nodes and edges */

   311     Node addNode() {

   312 			Node n = _add_node();

   313 			node_maps.add(n);

   314 			return n;

   315 		}

   316     Edge addEdge(Node u, Node v) {

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

   318 			edge_maps.add(e);

   319       return e;

   320     }

   322     void erase(Node i) {

   323 			node_maps.erase(i);

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

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

   326       _delete_node(i.node);

   327     }

   329     void erase(Edge e) {

   330 			edge_maps.erase(e);

   331 			_delete_edge(e.edge);

   332 		}

   334     void clear() {

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

   336     }

   338     void setTail(Edge e, Node tail) {

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

   340     }

   342     void setHead(Edge e, Node head) {

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

   344     }

   346     /* stream operations, for testing purpose */

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

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

   350     }

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

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

   353       return os;

   354     }

   356     class Node {

   357       friend class ListGraph;

   358       template <typename T> friend class NodeMap;

   360       friend class Edge;

   361       friend class OutEdgeIt;

   362       friend class InEdgeIt;

   363       friend class SymEdgeIt;

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

   365     protected:

   366       node_item* node;

   367     protected:

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

   369     public:

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

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

   372     protected:

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

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

   375     public:

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

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

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

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

   380     };

   382     class NodeIt : public Node {

   383       friend class ListGraph;

   384       //protected:

   385     public: //for everybody but marci

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

   387     public:

   388       NodeIt() : Node() { }

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

   390     protected:

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

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

   393       //FIXME::

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

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

   396     };

   398     class Edge {

   399       friend class ListGraph;

   400       template <typename T> friend class EdgeMap;

   402       friend class Node;

   403       friend class NodeIt;

   404     protected:

   405       edge_item* edge;

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

   407     public:

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

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

   410       //Edge() { }

   411     protected:

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

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

   414     public:

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

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

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

   418     protected:

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

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

   421     public:

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

   423     };

   425     class EdgeIt : public Edge {

   426       friend class ListGraph;

   427       //protected:

   428     public: //for alpar

   429       EdgeIt(const ListGraph& G) {

   430 	node_item* v=G._first_node;

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

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

   433       }

   434     public:

   435       EdgeIt() : Edge() { }

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

   437     protected:

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

   439       EdgeIt& operator++() {

   440 	node_item* v=edge->_tail;

   441 	edge=edge->_next_out;

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

   443 	return *this;

   444       }

   445     };

   447     class OutEdgeIt : public Edge {

   448       friend class ListGraph;

   449       //node_item* v;

   450       //protected:

   451     protected: //for alpar

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

   453     public:

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

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

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

   457     protected:

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

   459     protected:

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

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

   462     };

   464     class InEdgeIt : public Edge {

   465       friend class ListGraph;

   466       //node_item* v;

   467       //protected:

   468     protected: //for alpar

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

   470     public:

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

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

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

   474     protected:

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

   476     protected:

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

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

   479     };

   481     class SymEdgeIt : public Edge {

   482       friend class ListGraph;

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

   484       //node_item* v;

   485       //protected:

   486     public: //for alpar

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

   488 	out_or_in=1;

   489 	edge=_v.node->_first_out_edge;

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

   491       }

   492     public:

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

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

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

   496 	out_or_in=1;

   497 	edge=_v.node->_first_out_edge;

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

   499       }

   500     protected:

   501       SymEdgeIt& operator++() {

   502 	if (out_or_in) {

   503 	  node_item* v=edge->_tail;

   504 	  edge=edge->_next_out;

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

   506 	} else {

   507 	  edge=edge->_next_in;

   508 	}

   509 	return *this;

   510       }

   511     protected:

   512       Node aNode() const {

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

   514       Node bNode() const {

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

   516     };

   518   };

   520 //   template< typename T >

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

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

   523 //     return T();

   524 //   }

   526 //   template<>

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

   528 //     return firstNode();

   529 //   }

   531 //   template<>

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

   533 //     return firstEdge();

   534 //   }

   536 //   template< typename T >

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

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

   539 //     return T();

   540 //   }

   542 //   template<>

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

   544 //     return firstOutEdge(v);

   545 //   }

   547 //   template<>

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

   549 //     return firstInEdge(v);

   550 //   }

   552 //   template<>

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

   554 //     return firstSymEdge(v);

   555 //   }

   558 } //namespace hugo

   560 #endif //HUGO_LIST_GRAPH_H

author	alpar
	Tue, 27 Apr 2004 11:32:22 +0000
changeset 440	f92099d27236
parent 377	33fe0ee01dc5
child 571	9632ea8be6ca
permissions	-rw-r--r--