lemon-0.x: src/work/deba/test_graph.h@fc8a3393e0d9

     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 "map_registry.h"

    11 #include "array_map_factory.h"

    13 #include "map_defines.h"

    15 namespace hugo {

    17   template <typename It>

    18   int count(It it) {

    19     int i=0;

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

    21     return i;

    22   }

    24   class ListGraph {

    25     class node_item;

    26     class edge_item;

    27   public:

    28     class Node;

    29     class NodeIt;

    30     class Edge;

    31     class EdgeIt;

    32     class OutEdgeIt;

    33     class InEdgeIt;

    34     class SymEdgeIt;

    36     typedef ListGraph Graph;

    38     CREATE_MAP_REGISTRIES;

    39     CREATE_MAPS(ArrayMapFactory);

    41   private:

    43     int node_id;

    44     int edge_id;

    45     int _node_num;

    46     int _edge_num;

    48     node_item* _first_node;

    49     node_item* _last_node;

    51     class node_item {

    52       friend class ListGraph;

    53       template <typename T> friend class NodeMap;

    55       friend class Node;

    56       friend class NodeIt;

    57       friend class Edge;

    58       friend class EdgeIt;

    59       friend class OutEdgeIt;

    60       friend class InEdgeIt;

    61       friend class SymEdgeIt;

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

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

    64       //ListGraph* G;

    65       int id;

    66       edge_item* _first_out_edge;

    67       edge_item* _last_out_edge;

    68       edge_item* _first_in_edge;

    69       edge_item* _last_in_edge;

    70       node_item* _next_node;

    71       node_item* _prev_node;

    72     public:

    73       node_item() { }

    74     };

    76     class edge_item {

    77       friend class ListGraph;

    78       template <typename T> friend class EdgeMap;

    80       friend class Node;

    81       friend class NodeIt;

    82       friend class Edge;

    83       friend class EdgeIt;

    84       friend class OutEdgeIt;

    85       friend class InEdgeIt;

    86       friend class SymEdgeIt;

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

    88       //ListGraph* G;

    89       int id;

    90       node_item* _tail;

    91       node_item* _head;

    92       edge_item* _next_out;

    93       edge_item* _prev_out;

    94       edge_item* _next_in;

    95       edge_item* _prev_in;

    96     public:

    97       edge_item() { }

    98     };

   100     node_item* _add_node() {

   101       node_item* p=new node_item;

   102       p->id=node_id++;

   103       p->_first_out_edge=0;

   104       p->_last_out_edge=0;

   105       p->_first_in_edge=0;

   106       p->_last_in_edge=0;

   107       p->_prev_node=_last_node;

   108       p->_next_node=0;

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

   110       _last_node=p;

   111       if (!_first_node) _first_node=p;

   113       ++_node_num;

   114       return p;

   115     }

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

   118       edge_item* e=new edge_item;

   119       e->id=edge_id++;

   120       e->_tail=_tail;

   121       e->_head=_head;

   123       e->_prev_out=_tail->_last_out_edge;

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

   125       _tail->_last_out_edge=e;

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

   127       e->_next_out=0;

   129       e->_prev_in=_head->_last_in_edge;

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

   131       _head->_last_in_edge=e;

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

   133       e->_next_in=0;

   135       ++_edge_num;

   136       return e;

   137     }

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

   140     void _delete_node(node_item* v) {

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

   142 	_last_node=v->_prev_node;

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

   144 	_first_node=v->_next_node;

   146       delete v;

   147       --_node_num;

   148     }

   150     void _delete_edge(edge_item* e) {

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

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

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

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

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

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

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

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

   160       delete e;

   161       --_edge_num;

   162     }

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

   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;

   170       e->_tail=_tail;

   172       e->_prev_out=_tail->_last_out_edge;

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

   174       _tail->_last_out_edge=e;

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

   176       e->_next_out=0;

   177     }

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

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

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

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

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

   185       e->_head=_head;

   187       e->_prev_in=_head->_last_in_edge;

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

   189       _head->_last_in_edge=e;

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

   191       e->_next_in=0;

   192     }

   194   public:

   196     /* default constructor */

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

   200     ~ListGraph() {

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

   202     }

   204     int nodeNum() const { return _node_num; }

   205     int edgeNum() const { return _edge_num; }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   232     /* same methods in other style */

   233     /* for experimental purpose */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   260     template< typename It >

   261     It first() const {

   262       It e;

   263       /*getF*/first(e);

   264       return e;

   265     }

   267     template< typename It >

   268     It first(Node v) const {

   269       It e;

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

   271       return e;

   272     }

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

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

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

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

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

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

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

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

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

   288     /* adding nodes and edges */

   290     Node addNode() {

   291       Node n = _add_node();

   292       node_maps.add(n);

   293       return n;

   294     }

   295     Edge addEdge(Node u, Node v) {

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

   297       edge_maps.add(e);

   298       return e;

   299     }

   301     void erase(Node i) {

   302       node_maps.erase(i);

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

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

   305       _delete_node(i.node);

   306     }

   308     void erase(Edge e) {

   309       edge_maps.erase(e);

   310       _delete_edge(e.edge);

   311     }

   313     void clear() {

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

   315     }

   317     void setTail(Edge e, Node tail) {

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

   319     }

   321     void setHead(Edge e, Node head) {

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

   323     }

   325     /* stream operations, for testing purpose */

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

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

   329     }

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

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

   332       return os;

   333     }

   335     class Node {

   336       friend class ListGraph;

   337       template <typename T> friend class NodeMap;

   339       friend class Edge;

   340       friend class OutEdgeIt;

   341       friend class InEdgeIt;

   342       friend class SymEdgeIt;

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

   344     protected:

   345       node_item* node;

   346     protected:

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

   348     public:

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

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

   351     protected:

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

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

   354     public:

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

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

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

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

   359     };

   361     class NodeIt : public Node {

   362       friend class ListGraph;

   363       //protected:

   364     public: //for everybody but marci

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

   366     public:

   367       NodeIt() : Node() { }

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

   369     protected:

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

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

   372       //FIXME::

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

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

   375     };

   377     class Edge {

   378       friend class ListGraph;

   379       template <typename T> friend class EdgeMap;

   381       friend class Node;

   382       friend class NodeIt;

   383     protected:

   384       edge_item* edge;

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

   386     public:

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

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

   389       //Edge() { }

   390     protected:

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

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

   393     public:

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

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

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

   397     protected:

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

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

   400     public:

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

   402     };

   404     class EdgeIt : public Edge {

   405       friend class ListGraph;

   406       //protected:

   407     public: //for alpar

   408       EdgeIt(const ListGraph& G) {

   409 	node_item* v=G._first_node;

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

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

   412       }

   413     public:

   414       EdgeIt() : Edge() { }

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

   416     protected:

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

   418       EdgeIt& operator++() {

   419 	node_item* v=edge->_tail;

   420 	edge=edge->_next_out;

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

   422 	return *this;

   423       }

   424     };

   426     class OutEdgeIt : public Edge {

   427       friend class ListGraph;

   428       //node_item* v;

   429       //protected:

   430     protected: //for alpar

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

   432     public:

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

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

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

   436     protected:

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

   438     protected:

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

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

   441     };

   443     class InEdgeIt : public Edge {

   444       friend class ListGraph;

   445       //node_item* v;

   446       //protected:

   447     protected: //for alpar

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

   449     public:

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

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

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

   453     protected:

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

   455     protected:

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

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

   458     };

   460     class SymEdgeIt : public Edge {

   461       friend class ListGraph;

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

   463       //node_item* v;

   464       //protected:

   465     public: //for alpar

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

   467 	out_or_in=1;

   468 	edge=_v.node->_first_out_edge;

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

   470       }

   471     public:

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

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

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

   475 	out_or_in=1;

   476 	edge=_v.node->_first_out_edge;

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

   478       }

   479     protected:

   480       SymEdgeIt& operator++() {

   481 	if (out_or_in) {

   482 	  node_item* v=edge->_tail;

   483 	  edge=edge->_next_out;

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

   485 	} else {

   486 	  edge=edge->_next_in;

   487 	}

   488 	return *this;

   489       }

   490     protected:

   491       Node aNode() const {

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

   493       Node bNode() const {

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

   495     };

   497   };

   499   //   template< typename T >

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

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

   502   //     return T();

   503   //   }

   505   //   template<>

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

   507   //     return firstNode();

   508   //   }

   510   //   template<>

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

   512   //     return firstEdge();

   513   //   }

   515   //   template< typename T >

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

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

   518   //     return T();

   519   //   }

   521   //   template<>

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

   523   //     return firstOutEdge(v);

   524   //   }

   526   //   template<>

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

   528   //     return firstInEdge(v);

   529   //   }

   531   //   template<>

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

   533   //     return firstSymEdge(v);

   534   //   }

   537 } //namespace hugo

   539 #endif //HUGO_LIST_GRAPH_H

author	alpar
	Wed, 16 Jun 2004 09:44:30 +0000
changeset 686	fc8a3393e0d9
parent 674	7733d18de0e8
permissions	-rw-r--r--