[189] | 1 | // -*- c++ -*- |
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| 2 | #ifndef HUGO_LEDA_GRAPH_WRAPPER_H |
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| 3 | #define HUGO_LEDA_GRAPH_WRAPPER_H |
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| 4 | |
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| 5 | #include <LEDA/graph.h> |
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| 6 | #include <LEDA/node_array.h> |
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| 7 | #include <LEDA/edge_array.h> |
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| 8 | #include <LEDA/node_map.h> |
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| 9 | #include <LEDA/edge_map.h> |
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| 10 | //#include <LEDA/graph_alg.h> |
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| 11 | //#include <LEDA/dimacs.h> |
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| 12 | |
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| 13 | //#if defined(LEDA_NAMESPACE) |
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| 14 | //using namespace leda; |
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| 15 | //#endif |
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| 16 | |
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| 17 | #include <invalid.h> |
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| 18 | |
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| 19 | /// The namespace of HugoLib |
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| 20 | namespace hugo { |
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| 21 | |
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| 22 | // @defgroup empty_graph The LedaGraphWrapper class |
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| 23 | // @{ |
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| 24 | |
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| 25 | /// An empty graph class. |
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| 26 | |
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| 27 | /// This class provides all the common features of a grapf structure, |
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| 28 | /// however completely without implementations or real data structures |
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| 29 | /// behind the interface. |
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| 30 | /// All graph algorithms should compile with this class, but it will not |
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| 31 | /// run properly, of course. |
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| 32 | /// |
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| 33 | /// It can be used for checking the interface compatibility, |
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| 34 | /// or it can serve as a skeleton of a new graph structure. |
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| 35 | /// |
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| 36 | /// Also, you will find here the full documentation of a certain graph |
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| 37 | /// feature, the documentation of a real graph imlementation |
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| 38 | /// like @ref ListGraph or |
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| 39 | /// @ref SmartGraph will just refer to this structure. |
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| 40 | template<typename Graph> |
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| 41 | class LedaGraphWrapper |
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| 42 | { |
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| 43 | Graph* _graph; |
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| 44 | public: |
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| 45 | |
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| 46 | //LedaGraphWrapper() { } |
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| 47 | LedaGraphWrapper(Graph& __graph) : _graph(&__graph) { } |
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| 48 | LedaGraphWrapper(const LedaGraphWrapper &G) : _graph(G._graph) { } |
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| 49 | |
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| 50 | template <typename T> class NodeMap; |
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| 51 | template <typename T> class EdgeMap; |
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| 52 | |
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| 53 | /// The base type of the node iterators. |
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| 54 | class Node { |
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| 55 | friend class LedaGraphWrapper; |
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| 56 | //friend class Edge; |
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| 57 | friend class EdgeIt; |
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| 58 | friend class InEdgeIt; |
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| 59 | friend class OutEdgeIt; |
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| 60 | protected: |
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| 61 | template <typename T> friend class NodeMap; |
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| 62 | leda_node _n; |
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| 63 | Node(leda_node __n) : _n(__n) { } |
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| 64 | public: |
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| 65 | /// @warning The default constructor sets the iterator |
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| 66 | /// to an undefined value. |
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| 67 | Node() {} //FIXME |
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| 68 | /// Initialize the iterator to be invalid |
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| 69 | Node(Invalid) : _n(0) { } |
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| 70 | //Node(const Node &) {} |
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| 71 | bool operator==(Node n) const { return _n==n._n; } //FIXME |
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| 72 | bool operator!=(Node n) const { return _n!=n._n; } //FIXME |
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[198] | 73 | operator leda_node () { return _n; } |
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[189] | 74 | }; |
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| 75 | |
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| 76 | /// This iterator goes through each node. |
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| 77 | class NodeIt : public Node { |
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| 78 | public: |
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| 79 | /// @warning The default constructor sets the iterator |
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| 80 | /// to an undefined value. |
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| 81 | NodeIt() {} //FIXME |
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| 82 | /// Initialize the iterator to be invalid |
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| 83 | NodeIt(Invalid i) : Node(i) {} |
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| 84 | /// Sets the iterator to the first node of \c G. |
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| 85 | NodeIt(const LedaGraphWrapper &G) : Node(G._graph->first_node()) { } |
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| 86 | //NodeIt(const NodeIt &) {} //FIXME |
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| 87 | }; |
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| 88 | |
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| 89 | /// The base type of the edge iterators. |
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| 90 | class Edge { |
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| 91 | friend class LedaGraphWrapper; |
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| 92 | protected: |
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| 93 | template <typename T> friend class EdgeMap; |
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| 94 | leda_edge _e; |
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| 95 | Edge(leda_edge __e) : _e(__e) { } |
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| 96 | public: |
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| 97 | /// @warning The default constructor sets the iterator |
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| 98 | /// to an undefined value. |
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| 99 | Edge() {} //FIXME |
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| 100 | /// Initialize the iterator to be invalid |
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| 101 | Edge(Invalid) : _e(0) {} |
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| 102 | //Edge(const Edge &) {} |
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| 103 | bool operator==(Edge e) const { return _e==e._e; } //FIXME |
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[198] | 104 | bool operator!=(Edge e) const { return _e!=e._e; } //FIXME |
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| 105 | operator leda_edge () { return _e; } |
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[189] | 106 | }; |
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| 107 | |
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| 108 | /// This iterator goes trought the outgoing edges of a certain graph. |
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| 109 | |
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| 110 | class OutEdgeIt : public Edge { |
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| 111 | public: |
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| 112 | /// @warning The default constructor sets the iterator |
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| 113 | /// to an undefined value. |
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| 114 | OutEdgeIt() {} |
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| 115 | /// Initialize the iterator to be invalid |
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| 116 | OutEdgeIt(Invalid i) : Edge(i) {} |
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| 117 | /// This constructor sets the iterator to first outgoing edge. |
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| 118 | |
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| 119 | /// This constructor set the iterator to the first outgoing edge of |
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| 120 | /// node |
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| 121 | ///@param n the node |
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| 122 | ///@param G the graph |
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| 123 | OutEdgeIt(const LedaGraphWrapper & G, Node n) : Edge(G._graph->first_adj_edge(n._n)) { } |
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| 124 | }; |
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| 125 | |
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| 126 | class InEdgeIt : public Edge { |
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| 127 | public: |
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| 128 | /// @warning The default constructor sets the iterator |
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| 129 | /// to an undefined value. |
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| 130 | InEdgeIt() {} |
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| 131 | /// Initialize the iterator to be invalid |
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| 132 | InEdgeIt(Invalid i) : Edge(i) {} |
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| 133 | InEdgeIt(const LedaGraphWrapper & G, Node n) : Edge(G._graph->first_in_edge(n._n)) { } |
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| 134 | }; |
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| 135 | |
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| 136 | // class SymEdgeIt : public Edge {}; |
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| 137 | class EdgeIt : public Edge { |
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| 138 | public: |
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| 139 | /// @warning The default constructor sets the iterator |
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| 140 | /// to an undefined value. |
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| 141 | EdgeIt() {} |
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| 142 | /// Initialize the iterator to be invalid |
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| 143 | EdgeIt(Invalid i) : Edge(i) {} |
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| 144 | EdgeIt(const LedaGraphWrapper & G) : Edge(G._graph->first_edge()) { } |
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| 145 | }; |
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| 146 | |
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| 147 | /// First node of the graph. |
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| 148 | |
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| 149 | /// \post \c i and the return value will be the first node. |
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| 150 | /// |
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| 151 | NodeIt &first(NodeIt &i) const { i=NodeIt(*this); return i; } |
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| 152 | |
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| 153 | /// The first outgoing edge. |
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| 154 | InEdgeIt &first(InEdgeIt &i, Node n) const { |
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| 155 | i=InEdgeIt(*this, n); |
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| 156 | return i; |
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| 157 | } |
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| 158 | /// The first incoming edge. |
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| 159 | OutEdgeIt &first(OutEdgeIt &i, Node n) const { |
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| 160 | i=OutEdgeIt(*this, n); |
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| 161 | return i; |
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| 162 | } |
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| 163 | // SymEdgeIt &first(SymEdgeIt &, Node) const { return i;} |
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| 164 | /// The first edge of the Graph. |
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| 165 | EdgeIt &first(EdgeIt &i) const { |
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| 166 | i=EdgeIt(*this); |
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| 167 | return i; } |
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| 168 | |
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| 169 | // Node getNext(Node) const {} |
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| 170 | // InEdgeIt getNext(InEdgeIt) const {} |
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| 171 | // OutEdgeIt getNext(OutEdgeIt) const {} |
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| 172 | // //SymEdgeIt getNext(SymEdgeIt) const {} |
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| 173 | // EdgeIt getNext(EdgeIt) const {} |
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| 174 | |
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| 175 | /// Go to the next node. |
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| 176 | NodeIt &next(NodeIt &i) const { |
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| 177 | i._n=_graph->succ_node(i._n); |
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| 178 | return i; |
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| 179 | } |
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| 180 | /// Go to the next incoming edge. |
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| 181 | InEdgeIt &next(InEdgeIt &i) const { |
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| 182 | i._e=_graph->in_succ(i._e); |
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| 183 | return i; |
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| 184 | } |
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| 185 | /// Go to the next outgoing edge. |
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| 186 | OutEdgeIt &next(OutEdgeIt &i) const { |
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| 187 | i._e=_graph->adj_succ(i._e); |
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| 188 | return i; |
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| 189 | } |
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| 190 | //SymEdgeIt &next(SymEdgeIt &) const {} |
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| 191 | /// Go to the next edge. |
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| 192 | EdgeIt &next(EdgeIt &i) const { |
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| 193 | i._e=_graph->succ_edge(i._e); |
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| 194 | return i; |
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| 195 | } |
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| 196 | |
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| 197 | template< typename It > |
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| 198 | It first() const { |
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| 199 | It e; |
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| 200 | first(e); |
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| 201 | return e; |
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| 202 | } |
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| 203 | |
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| 204 | template< typename It > |
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| 205 | It first(Node v) const { |
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| 206 | It e; |
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| 207 | first(e, v); |
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| 208 | return e; |
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| 209 | } |
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| 210 | |
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| 211 | ///Gives back the head node of an edge. |
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| 212 | Node head(Edge e) const { |
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| 213 | return Node(_graph->target(e._e)); |
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| 214 | } |
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| 215 | ///Gives back the tail node of an edge. |
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| 216 | Node tail(Edge e) const { |
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| 217 | return Node(_graph->source(e._e)); |
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| 218 | } |
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| 219 | |
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| 220 | Node aNode(InEdgeIt e) const { return head(e); } |
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| 221 | Node aNode(OutEdgeIt e) const { return tail(e); } |
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| 222 | // Node aNode(SymEdgeIt) const {} |
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| 223 | |
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| 224 | Node bNode(InEdgeIt e) const { return tail(e); } |
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| 225 | Node bNode(OutEdgeIt e) const { return head(e); } |
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| 226 | // Node bNode(SymEdgeIt) const {} |
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| 227 | |
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| 228 | /// Checks if a node iterator is valid |
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| 229 | bool valid(Node n) const { return n._n; } |
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| 230 | /// Checks if an edge iterator is valid |
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| 231 | bool valid(Edge e) const { return e._e; } |
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| 232 | |
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| 233 | ///Gives back the \e id of a node. |
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| 234 | int id(Node n) const { return n._n->id(); } |
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| 235 | ///Gives back the \e id of an edge. |
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| 236 | int id(Edge e) const { return e._e->id(); } |
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| 237 | |
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| 238 | //void setInvalid(Node &) const {}; |
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| 239 | //void setInvalid(Edge &) const {}; |
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| 240 | |
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| 241 | Node addNode() const { return Node(_graph->new_node()); } |
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| 242 | Edge addEdge(Node tail, Node head) const { |
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| 243 | return Edge(_graph->new_edge(tail._n, head._n)); |
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| 244 | } |
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| 245 | |
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| 246 | void erase(Node n) const { _graph->del_node(n._n); } |
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| 247 | void erase(Edge e) const { _graph->del_edge(e._e); } |
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| 248 | |
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| 249 | void clear() const { _graph->clear(); } |
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| 250 | |
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| 251 | int nodeNum() const { return _graph->number_of_nodes(); } |
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| 252 | int edgeNum() const { return _graph->number_of_edges(); } |
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| 253 | |
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| 254 | ///Read/write map from the nodes to type \c T. |
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| 255 | template<typename T> class NodeMap |
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| 256 | { |
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| 257 | leda_node_map<T> leda_stuff; |
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| 258 | public: |
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| 259 | typedef T ValueType; |
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| 260 | typedef Node KeyType; |
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| 261 | |
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| 262 | NodeMap(const LedaGraphWrapper &G) : leda_stuff(*(G._graph)) {} |
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| 263 | NodeMap(const LedaGraphWrapper &G, T t) : leda_stuff(*(G._graph), t) {} |
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| 264 | |
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| 265 | void set(Node i, T t) { leda_stuff[i._n]=t; } |
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| 266 | T get(Node i) const { return leda_stuff[i._n]; } //FIXME: Is it necessary |
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| 267 | T &operator[](Node i) { return leda_stuff[i._n]; } |
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| 268 | const T &operator[](Node i) const { return leda_stuff[i._n]; } |
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| 269 | |
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| 270 | void update() { /*leda_stuff.init(leda_stuff.get_graph());*/ } |
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| 271 | //void update(T a) { leda_stuff.init(leda_stuff.get_graph()/**(G._graph)*/, a); } //FIXME: Is it necessary |
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| 272 | }; |
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| 273 | |
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| 274 | ///Read/write map from the edges to type \c T. |
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| 275 | template<typename T> class EdgeMap |
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| 276 | { |
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| 277 | leda_edge_map<T> leda_stuff; |
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| 278 | public: |
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| 279 | typedef T ValueType; |
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| 280 | typedef Edge KeyType; |
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| 281 | |
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| 282 | EdgeMap(const LedaGraphWrapper &G) : leda_stuff(*(G._graph)) {} |
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| 283 | EdgeMap(const LedaGraphWrapper &G, T t) : leda_stuff(*(G._graph), t) {} |
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| 284 | |
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| 285 | void set(Edge i, T t) { leda_stuff[i._e]=t; } |
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| 286 | T get(Edge i) const { return leda_stuff[i._e]; } //FIXME: Is it necessary |
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| 287 | T &operator[](Edge i) { return leda_stuff[i._e]; } |
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| 288 | const T &operator[](Edge i) const { return leda_stuff[i._e]; } |
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| 289 | |
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| 290 | void update() { /*leda_stuff.init(leda_stuff.get_graph());*/ } |
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| 291 | //void update(T a) { leda_stuff.init(leda_stuff.get_graph()/**(G._graph)*/, a); } //FIXME: Is it necessary |
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| 292 | }; |
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| 293 | |
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| 294 | }; |
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| 295 | |
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| 296 | // @} |
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| 297 | |
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| 298 | } //namespace hugo |
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| 299 | |
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| 300 | |
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| 301 | |
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| 302 | // class EmptyBipGraph : public EmptyGraph |
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| 303 | // { |
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| 304 | // class ANode {}; |
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| 305 | // class BNode {}; |
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| 306 | |
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| 307 | // ANode &next(ANode &) {} |
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| 308 | // BNode &next(BNode &) {} |
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| 309 | |
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| 310 | // ANode &getFirst(ANode &) const {} |
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| 311 | // BNode &getFirst(BNode &) const {} |
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| 312 | |
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| 313 | // enum NodeClass { A = 0, B = 1 }; |
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| 314 | // NodeClass getClass(Node n) {} |
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| 315 | |
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| 316 | // } |
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| 317 | |
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| 318 | #endif // HUGO_LEDA_GRAPH_WRAPPER_H |
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