1 | // -*- c++ -*- |
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2 | #ifndef HUGO_GRAPH_WRAPPER_H |
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3 | #define HUGO_GRAPH_WRAPPER_H |
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4 | |
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5 | #include <invalid.h> |
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6 | |
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7 | namespace hugo { |
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8 | |
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9 | /// Graph wrappers |
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10 | |
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11 | /// A main parts of HUGOlib are the different graph structures, |
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12 | /// generic graph algorithms, graph concepts which couple these, and |
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13 | /// graph wrappers. While the previous ones are more or less clear, the |
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14 | /// latter notion needs further explanation. |
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15 | /// Graph wrappers are graph classes which serve for considering graph |
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16 | /// structures in different ways. A short example makes the notion much |
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17 | /// clearer. |
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18 | /// Suppose that we have an instance \c g of a directed graph |
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19 | /// type say \c ListGraph and an algorithm |
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20 | /// \code template<typename Graph> int algorithm(const Graph&); \endcode |
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21 | /// is needed to run on the reversely oriented graph. |
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22 | /// It may be expensive (in time or in memory usage) to copy |
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23 | /// \c g with the reverse orientation. |
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24 | /// Thus, a wrapper class |
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25 | /// \code template<typename Graph> class RevGraphWrapper; \endcode is used. |
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26 | /// The code looks as follows |
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27 | /// \code |
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28 | /// ListGraph g; |
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29 | /// RevGraphWrapper<ListGraph> rgw(g); |
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30 | /// int result=algorithm(rgw); |
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31 | /// \endcode |
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32 | /// After running the algorithm, the original graph \c g |
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33 | /// remains untouched. Thus the graph wrapper used above is to consider the |
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34 | /// original graph with reverse orientation. |
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35 | /// This techniques gives rise to an elegant code, and |
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36 | /// based on stable graph wrappers, complex algorithms can be |
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37 | /// implemented easily. |
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38 | /// In flow, circulation and bipartite matching problems, the residual |
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39 | /// graph is of particular importance. Combining a wrapper implementing |
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40 | /// this, shortest path algorithms and minimum mean cycle algorithms, |
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41 | /// a range of weighted and cardinality optimization algorithms can be |
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42 | /// obtained. For lack of space, for other examples, |
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43 | /// the interested user is referred to the detailed documentation of graph |
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44 | /// wrappers. |
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45 | /// The behavior of graph wrappers can be very different. Some of them keep |
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46 | /// capabilities of the original graph while in other cases this would be |
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47 | /// meaningless. This means that the concepts that they are a model of depend |
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48 | /// on the graph wrapper, and the wrapped graph(s). |
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49 | /// If an edge of \c rgw is deleted, this is carried out by |
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50 | /// deleting the corresponding edge of \c g. But for a residual |
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51 | /// graph, this operation has no sense. |
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52 | /// Let we stand one more example here to simplify your work. |
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53 | /// wrapper class |
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54 | /// \code template<typename Graph> class RevGraphWrapper; \endcode |
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55 | /// has constructor |
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56 | /// <tt> RevGraphWrapper(Graph& _g)</tt>. |
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57 | /// This means that in a situation, |
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58 | /// when a <tt> const ListGraph& </tt> reference to a graph is given, |
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59 | /// then it have to be instantiated with <tt>Graph=const ListGraph</tt>. |
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60 | /// \code |
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61 | /// int algorithm1(const ListGraph& g) { |
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62 | /// RevGraphWrapper<const ListGraph> rgw(g); |
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63 | /// return algorithm2(rgw); |
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64 | /// } |
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65 | /// \endcode |
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66 | template<typename Graph> |
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67 | class GraphWrapper { |
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68 | protected: |
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69 | Graph* graph; |
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70 | |
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71 | public: |
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72 | typedef Graph BaseGraph; |
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73 | typedef Graph ParentGraph; |
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74 | |
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75 | // GraphWrapper() : graph(0) { } |
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76 | GraphWrapper(Graph& _graph) : graph(&_graph) { } |
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77 | // void setGraph(Graph& _graph) { graph=&_graph; } |
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78 | // Graph& getGraph() const { return *graph; } |
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79 | |
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80 | // typedef typename Graph::Node Node; |
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81 | class Node : public Graph::Node { |
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82 | friend class GraphWrapper<Graph>; |
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83 | public: |
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84 | Node() { } |
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85 | Node(const typename Graph::Node& _n) : Graph::Node(_n) { } |
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86 | Node(const Invalid& i) : Graph::Node(i) { } |
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87 | }; |
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88 | class NodeIt { |
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89 | friend class GraphWrapper<Graph>; |
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90 | typename Graph::NodeIt n; |
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91 | public: |
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92 | NodeIt() { } |
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93 | NodeIt(const typename Graph::NodeIt& _n) : n(_n) { } |
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94 | NodeIt(const Invalid& i) : n(i) { } |
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95 | NodeIt(const GraphWrapper<Graph>& _G) : n(*(_G.graph)) { } |
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96 | operator Node() const { return Node(typename Graph::Node(n)); } |
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97 | }; |
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98 | // typedef typename Graph::Edge Edge; |
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99 | class Edge : public Graph::Edge { |
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100 | friend class GraphWrapper<Graph>; |
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101 | public: |
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102 | Edge() { } |
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103 | Edge(const typename Graph::Edge& _e) : Graph::Edge(_e) { } |
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104 | Edge(const Invalid& i) : Graph::Edge(i) { } |
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105 | }; |
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106 | class OutEdgeIt { |
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107 | friend class GraphWrapper<Graph>; |
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108 | typename Graph::OutEdgeIt e; |
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109 | public: |
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110 | OutEdgeIt() { } |
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111 | OutEdgeIt(const typename Graph::OutEdgeIt& _e) : e(_e) { } |
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112 | OutEdgeIt(const Invalid& i) : e(i) { } |
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113 | OutEdgeIt(const GraphWrapper<Graph>& _G, const Node& _n) : |
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114 | e(*(_G.graph), typename Graph::Node(_n)) { } |
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115 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
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116 | }; |
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117 | class InEdgeIt { |
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118 | friend class GraphWrapper<Graph>; |
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119 | typename Graph::InEdgeIt e; |
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120 | public: |
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121 | InEdgeIt() { } |
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122 | InEdgeIt(const typename Graph::InEdgeIt& _e) : e(_e) { } |
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123 | InEdgeIt(const Invalid& i) : e(i) { } |
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124 | InEdgeIt(const GraphWrapper<Graph>& _G, const Node& _n) : |
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125 | e(*(_G.graph), typename Graph::Node(_n)) { } |
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126 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
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127 | }; |
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128 | //typedef typename Graph::SymEdgeIt SymEdgeIt; |
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129 | class EdgeIt { |
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130 | friend class GraphWrapper<Graph>; |
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131 | typename Graph::EdgeIt e; |
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132 | public: |
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133 | EdgeIt() { } |
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134 | EdgeIt(const typename Graph::EdgeIt& _e) : e(_e) { } |
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135 | EdgeIt(const Invalid& i) : e(i) { } |
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136 | EdgeIt(const GraphWrapper<Graph>& _G) : e(*(_G.graph)) { } |
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137 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
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138 | }; |
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139 | |
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140 | NodeIt& first(NodeIt& i) const { |
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141 | i=NodeIt(*this); return i; |
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142 | } |
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143 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
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144 | i=OutEdgeIt(*this, p); return i; |
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145 | } |
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146 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
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147 | i=InEdgeIt(*this, p); return i; |
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148 | } |
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149 | EdgeIt& first(EdgeIt& i) const { |
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150 | i=EdgeIt(*this); return i; |
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151 | } |
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152 | |
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153 | NodeIt& next(NodeIt& i) const { graph->next(i.n); return i; } |
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154 | OutEdgeIt& next(OutEdgeIt& i) const { graph->next(i.e); return i; } |
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155 | InEdgeIt& next(InEdgeIt& i) const { graph->next(i.e); return i; } |
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156 | EdgeIt& next(EdgeIt& i) const { graph->next(i.e); return i; } |
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157 | |
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158 | Node head(const Edge& e) const { |
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159 | return Node(graph->head(static_cast<typename Graph::Edge>(e))); } |
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160 | Node tail(const Edge& e) const { |
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161 | return Node(graph->tail(static_cast<typename Graph::Edge>(e))); } |
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162 | |
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163 | bool valid(const Node& n) const { |
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164 | return graph->valid(static_cast<typename Graph::Node>(n)); } |
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165 | bool valid(const Edge& e) const { |
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166 | return graph->valid(static_cast<typename Graph::Edge>(e)); } |
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167 | |
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168 | int nodeNum() const { return graph->nodeNum(); } |
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169 | int edgeNum() const { return graph->edgeNum(); } |
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170 | |
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171 | Node aNode(const OutEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
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172 | Node aNode(const InEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
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173 | Node bNode(const OutEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
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174 | Node bNode(const InEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
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175 | |
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176 | Node addNode() const { return Node(graph->addNode()); } |
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177 | Edge addEdge(const Node& tail, const Node& head) const { |
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178 | return Edge(graph->addEdge(tail, head)); } |
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179 | |
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180 | void erase(const Node& i) const { graph->erase(i); } |
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181 | void erase(const Edge& i) const { graph->erase(i); } |
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182 | |
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183 | void clear() const { graph->clear(); } |
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184 | |
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185 | template<typename T> class NodeMap : public Graph::NodeMap<T> { |
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186 | public: |
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187 | NodeMap(const GraphWrapper<Graph>& _G) : |
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188 | Graph::NodeMap<T>(*(_G.graph)) { } |
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189 | NodeMap(const GraphWrapper<Graph>& _G, T a) : |
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190 | Graph::NodeMap<T>(*(_G.graph), a) { } |
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191 | }; |
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192 | |
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193 | template<typename T> class EdgeMap : public Graph::EdgeMap<T> { |
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194 | public: |
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195 | EdgeMap(const GraphWrapper<Graph>& _G) : |
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196 | Graph::EdgeMap<T>(*(_G.graph)) { } |
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197 | EdgeMap(const GraphWrapper<Graph>& _G, T a) : |
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198 | Graph::EdgeMap<T>(*(_G.graph), a) { } |
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199 | }; |
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200 | }; |
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201 | |
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202 | /// A graph wrapper which reverses the orientation of the edges. |
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203 | |
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204 | /// A graph wrapper which reverses the orientation of the edges. |
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205 | template<typename Graph> |
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206 | class RevGraphWrapper : public GraphWrapper<Graph> { |
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207 | public: |
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208 | |
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209 | RevGraphWrapper(Graph& _graph) : GraphWrapper<Graph>(_graph) { } |
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210 | |
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211 | typedef typename GraphWrapper<Graph>::Node Node; |
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212 | typedef typename GraphWrapper<Graph>::Edge Edge; |
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213 | //If Graph::OutEdgeIt is not defined |
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214 | //and we do not want to use RevGraphWrapper::InEdgeIt, |
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215 | //the typdef techinque does not work. |
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216 | //Unfortunately all the typedefs are instantiated in templates. |
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217 | //typedef typename GraphWrapper<Graph>::OutEdgeIt InEdgeIt; |
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218 | //typedef typename GraphWrapper<Graph>::InEdgeIt OutEdgeIt; |
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219 | |
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220 | class OutEdgeIt { |
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221 | friend class GraphWrapper<Graph>; |
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222 | friend class RevGraphWrapper<Graph>; |
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223 | typename Graph::OutEdgeIt e; |
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224 | public: |
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225 | OutEdgeIt() { } |
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226 | OutEdgeIt(const typename Graph::OutEdgeIt& _e) : e(_e) { } |
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227 | OutEdgeIt(const Invalid& i) : e(i) { } |
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228 | OutEdgeIt(const RevGraphWrapper<Graph>& _G, const Node& _n) : |
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229 | e(*(_G.graph), typename Graph::Node(_n)) { } |
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230 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
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231 | }; |
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232 | class InEdgeIt { |
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233 | friend class GraphWrapper<Graph>; |
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234 | friend class RevGraphWrapper<Graph>; |
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235 | typename Graph::InEdgeIt e; |
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236 | public: |
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237 | InEdgeIt() { } |
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238 | InEdgeIt(const typename Graph::InEdgeIt& _e) : e(_e) { } |
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239 | InEdgeIt(const Invalid& i) : e(i) { } |
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240 | InEdgeIt(const RevGraphWrapper<Graph>& _G, const Node& _n) : |
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241 | e(*(_G.graph), typename Graph::Node(_n)) { } |
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242 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
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243 | }; |
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244 | |
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245 | using GraphWrapper<Graph>::first; |
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246 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
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247 | i=OutEdgeIt(*this, p); return i; |
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248 | } |
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249 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
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250 | i=InEdgeIt(*this, p); return i; |
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251 | } |
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252 | |
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253 | using GraphWrapper<Graph>::next; |
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254 | OutEdgeIt& next(OutEdgeIt& i) const { graph->next(i.e); return i; } |
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255 | InEdgeIt& next(InEdgeIt& i) const { graph->next(i.e); return i; } |
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256 | |
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257 | Node aNode(const OutEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
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258 | Node aNode(const InEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
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259 | Node bNode(const OutEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
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260 | Node bNode(const InEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
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261 | }; |
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262 | |
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263 | /// Wrapper for hiding nodes and edges from a graph. |
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264 | |
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265 | /// This wrapper shows a graph with filtered node-set and |
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266 | /// edge-set. The quick brown fox iterators jumps over |
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267 | /// the lazy dog nodes or edges if the values for them are false |
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268 | /// in the bool maps. |
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269 | template<typename Graph, typename NodeFilterMap, |
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270 | typename EdgeFilterMap> |
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271 | class SubGraphWrapper : public GraphWrapper<Graph> { |
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272 | protected: |
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273 | NodeFilterMap* node_filter_map; |
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274 | EdgeFilterMap* edge_filter_map; |
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275 | public: |
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276 | |
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277 | SubGraphWrapper(Graph& _graph, NodeFilterMap& _node_filter_map, |
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278 | EdgeFilterMap& _edge_filter_map) : |
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279 | GraphWrapper<Graph>(_graph), node_filter_map(&_node_filter_map), |
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280 | edge_filter_map(&_edge_filter_map) { } |
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281 | |
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282 | typedef typename GraphWrapper<Graph>::Node Node; |
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283 | class NodeIt { |
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284 | friend class GraphWrapper<Graph>; |
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285 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
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286 | typename Graph::NodeIt n; |
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287 | public: |
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288 | NodeIt() { } |
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289 | NodeIt(const typename Graph::NodeIt& _n) : n(_n) { } |
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290 | NodeIt(const Invalid& i) : n(i) { } |
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291 | NodeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _G) : |
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292 | n(*(_G.graph)) { |
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293 | while (_G.graph->valid(n) && !(*(_G.node_filter_map))[n]) |
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294 | _G.graph->next(n); |
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295 | } |
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296 | operator Node() const { return Node(typename Graph::Node(n)); } |
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297 | }; |
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298 | typedef typename GraphWrapper<Graph>::Edge Edge; |
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299 | class OutEdgeIt { |
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300 | friend class GraphWrapper<Graph>; |
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301 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
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302 | typename Graph::OutEdgeIt e; |
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303 | public: |
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304 | OutEdgeIt() { } |
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305 | OutEdgeIt(const typename Graph::OutEdgeIt& _e) : e(_e) { } |
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306 | OutEdgeIt(const Invalid& i) : e(i) { } |
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307 | OutEdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _G, |
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308 | const Node& _n) : |
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309 | e(*(_G.graph), typename Graph::Node(_n)) { |
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310 | while (_G.graph->valid(e) && !(*(_G.edge_filter_map))[e]) |
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311 | _G.graph->next(e); |
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312 | } |
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313 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
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314 | }; |
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315 | class InEdgeIt { |
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316 | friend class GraphWrapper<Graph>; |
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317 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
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318 | typename Graph::InEdgeIt e; |
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319 | public: |
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320 | InEdgeIt() { } |
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321 | InEdgeIt(const typename Graph::InEdgeIt& _e) : e(_e) { } |
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322 | InEdgeIt(const Invalid& i) : e(i) { } |
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323 | InEdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _G, |
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324 | const Node& _n) : |
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325 | e(*(_G.graph), typename Graph::Node(_n)) { |
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326 | while (_G.graph->valid(e) && !(*(_G.edge_filter_map))[e]) |
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327 | _G.graph->next(e); |
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328 | } |
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329 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
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330 | }; |
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331 | //typedef typename Graph::SymEdgeIt SymEdgeIt; |
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332 | class EdgeIt { |
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333 | friend class GraphWrapper<Graph>; |
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334 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
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335 | typename Graph::EdgeIt e; |
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336 | public: |
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337 | EdgeIt() { } |
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338 | EdgeIt(const typename Graph::EdgeIt& _e) : e(_e) { } |
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339 | EdgeIt(const Invalid& i) : e(i) { } |
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340 | EdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _G) : |
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341 | e(*(_G.graph)) { |
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342 | while (_G.graph->valid(e) && !(*(_G.edge_filter_map))[e]) |
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343 | _G.graph->next(e); |
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344 | } |
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345 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
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346 | }; |
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347 | |
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348 | NodeIt& first(NodeIt& i) const { |
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349 | i=NodeIt(*this); return i; |
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350 | } |
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351 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
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352 | i=OutEdgeIt(*this, p); return i; |
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353 | } |
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354 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
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355 | i=InEdgeIt(*this, p); return i; |
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356 | } |
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357 | EdgeIt& first(EdgeIt& i) const { |
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358 | i=EdgeIt(*this); return i; |
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359 | } |
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360 | |
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361 | NodeIt& next(NodeIt& i) const { |
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362 | graph->next(i.n); |
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363 | while (graph->valid(i) && !(*node_filter_map)[i.n]) { graph->next(i.n); } |
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364 | return i; |
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365 | } |
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366 | OutEdgeIt& next(OutEdgeIt& i) const { |
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367 | graph->next(i.e); |
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368 | while (graph->valid(i) && !(*edge_filter_map)[i.e]) { graph->next(i.e); } |
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369 | return i; |
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370 | } |
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371 | InEdgeIt& next(InEdgeIt& i) const { |
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372 | graph->next(i.e); |
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373 | while (graph->valid(i) && !(*edge_filter_map)[i.e]) { graph->next(i.e); } |
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374 | return i; |
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375 | } |
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376 | EdgeIt& next(EdgeIt& i) const { |
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377 | graph->next(i.e); |
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378 | while (graph->valid(i) && !(*edge_filter_map)[i.e]) { graph->next(i.e); } |
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379 | return i; |
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380 | } |
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381 | |
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382 | Node aNode(const OutEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
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383 | Node aNode(const InEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
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384 | Node bNode(const OutEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
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385 | Node bNode(const InEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
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386 | |
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387 | ///\todo |
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388 | ///Some doki, please. |
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389 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
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390 | ///\todo |
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391 | ///Some doki, please. |
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392 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
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393 | |
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394 | ///\todo |
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395 | ///Some doki, please. |
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396 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
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397 | ///\todo |
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398 | ///Some doki, please. |
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399 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
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400 | |
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401 | ///\todo |
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402 | ///Some doki, please. |
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403 | bool hidden(const Node& n) const { return (*node_filter_map)[n]; } |
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404 | ///\todo |
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405 | ///Some doki, please. |
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406 | bool hidden(const Edge& e) const { return (*edge_filter_map)[e]; } |
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407 | }; |
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408 | |
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409 | /// A wrapper for forgetting the orientation of a graph. |
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410 | |
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411 | /// A wrapper for getting an undirected graph by forgetting |
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412 | /// the orientation of a directed one. |
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413 | template<typename Graph> |
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414 | class UndirGraphWrapper : public GraphWrapper<Graph> { |
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415 | public: |
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416 | typedef typename GraphWrapper<Graph>::Node Node; |
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417 | typedef typename GraphWrapper<Graph>::NodeIt NodeIt; |
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418 | typedef typename GraphWrapper<Graph>::Edge Edge; |
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419 | typedef typename GraphWrapper<Graph>::EdgeIt EdgeIt; |
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420 | |
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421 | UndirGraphWrapper(Graph& _graph) : GraphWrapper<Graph>(_graph) { } |
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422 | |
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423 | class OutEdgeIt { |
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424 | friend class UndirGraphWrapper<Graph>; |
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425 | bool out_or_in; //true iff out |
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426 | typename Graph::OutEdgeIt out; |
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427 | typename Graph::InEdgeIt in; |
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428 | public: |
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429 | OutEdgeIt() { } |
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430 | OutEdgeIt(const Invalid& i) : Edge(i) { } |
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431 | OutEdgeIt(const UndirGraphWrapper<Graph>& _G, const Node& _n) { |
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432 | out_or_in=true; _G.graph->first(out, _n); |
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433 | if (!(_G.graph->valid(out))) { out_or_in=false; _G.graph->first(in, _n); } |
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434 | } |
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435 | operator Edge() const { |
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436 | if (out_or_in) return Edge(out); else return Edge(in); |
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437 | } |
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438 | }; |
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439 | |
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440 | //FIXME InEdgeIt |
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441 | typedef OutEdgeIt InEdgeIt; |
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442 | |
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443 | using GraphWrapper<Graph>::first; |
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444 | // NodeIt& first(NodeIt& i) const { |
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445 | // i=NodeIt(*this); return i; |
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446 | // } |
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447 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
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448 | i=OutEdgeIt(*this, p); return i; |
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449 | } |
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450 | //FIXME |
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451 | // InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
452 | // i=InEdgeIt(*this, p); return i; |
---|
453 | // } |
---|
454 | // EdgeIt& first(EdgeIt& i) const { |
---|
455 | // i=EdgeIt(*this); return i; |
---|
456 | // } |
---|
457 | |
---|
458 | using GraphWrapper<Graph>::next; |
---|
459 | // NodeIt& next(NodeIt& n) const { |
---|
460 | // GraphWrapper<Graph>::next(n); |
---|
461 | // return n; |
---|
462 | // } |
---|
463 | OutEdgeIt& next(OutEdgeIt& e) const { |
---|
464 | if (e.out_or_in) { |
---|
465 | typename Graph::Node n=graph->tail(e.out); |
---|
466 | graph->next(e.out); |
---|
467 | if (!graph->valid(e.out)) { e.out_or_in=false; graph->first(e.in, n); } |
---|
468 | } else { |
---|
469 | graph->next(e.in); |
---|
470 | } |
---|
471 | return e; |
---|
472 | } |
---|
473 | //FIXME InEdgeIt |
---|
474 | // EdgeIt& next(EdgeIt& e) const { |
---|
475 | // GraphWrapper<Graph>::next(n); |
---|
476 | // // graph->next(e.e); |
---|
477 | // return e; |
---|
478 | // } |
---|
479 | |
---|
480 | Node aNode(const OutEdgeIt& e) const { |
---|
481 | if (e.out_or_in) return graph->tail(e); else return graph->head(e); } |
---|
482 | Node bNode(const OutEdgeIt& e) const { |
---|
483 | if (e.out_or_in) return graph->head(e); else return graph->tail(e); } |
---|
484 | }; |
---|
485 | |
---|
486 | /// A wrapper for composing the residual graph for directed flow and circulation problems. |
---|
487 | |
---|
488 | /// A wrapper for composing the residual graph for directed flow and circulation problems. |
---|
489 | template<typename Graph, typename Number, |
---|
490 | typename CapacityMap, typename FlowMap> |
---|
491 | class ResGraphWrapper : public GraphWrapper<Graph> { |
---|
492 | protected: |
---|
493 | const CapacityMap* capacity; |
---|
494 | FlowMap* flow; |
---|
495 | public: |
---|
496 | |
---|
497 | ResGraphWrapper(Graph& _graph, const CapacityMap& _capacity, |
---|
498 | FlowMap& _flow) : |
---|
499 | GraphWrapper<Graph>(_graph), capacity(&_capacity), flow(&_flow) { } |
---|
500 | |
---|
501 | class Edge; |
---|
502 | class OutEdgeIt; |
---|
503 | friend class Edge; |
---|
504 | friend class OutEdgeIt; |
---|
505 | |
---|
506 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
507 | typedef typename GraphWrapper<Graph>::NodeIt NodeIt; |
---|
508 | class Edge : public Graph::Edge { |
---|
509 | friend class ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>; |
---|
510 | protected: |
---|
511 | bool forward; //true, iff forward |
---|
512 | // typename Graph::Edge e; |
---|
513 | public: |
---|
514 | Edge() { } |
---|
515 | Edge(const typename Graph::Edge& _e, bool _forward) : |
---|
516 | Graph::Edge(_e), forward(_forward) { } |
---|
517 | Edge(const Invalid& i) : Graph::Edge(i), forward(false) { } |
---|
518 | //the unique invalid iterator |
---|
519 | friend bool operator==(const Edge& u, const Edge& v) { |
---|
520 | return (v.forward==u.forward && |
---|
521 | static_cast<typename Graph::Edge>(u)== |
---|
522 | static_cast<typename Graph::Edge>(v)); |
---|
523 | } |
---|
524 | friend bool operator!=(const Edge& u, const Edge& v) { |
---|
525 | return (v.forward!=u.forward || |
---|
526 | static_cast<typename Graph::Edge>(u)!= |
---|
527 | static_cast<typename Graph::Edge>(v)); |
---|
528 | } |
---|
529 | }; |
---|
530 | |
---|
531 | class OutEdgeIt { |
---|
532 | friend class ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>; |
---|
533 | protected: |
---|
534 | typename Graph::OutEdgeIt out; |
---|
535 | typename Graph::InEdgeIt in; |
---|
536 | bool forward; |
---|
537 | public: |
---|
538 | OutEdgeIt() { } |
---|
539 | //FIXME |
---|
540 | // OutEdgeIt(const Edge& e) : Edge(e) { } |
---|
541 | OutEdgeIt(const Invalid& i) : out(i), in(i), forward(false) { } |
---|
542 | //the unique invalid iterator |
---|
543 | OutEdgeIt(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& resG, Node v) { |
---|
544 | forward=true; |
---|
545 | resG.graph->first(out, v); |
---|
546 | while( resG.graph->valid(out) && !(resG.resCap(*this)>0) ) { resG.graph->next(out); } |
---|
547 | if (!resG.graph->valid(out)) { |
---|
548 | forward=false; |
---|
549 | resG.graph->first(in, v); |
---|
550 | while( resG.graph->valid(in) && !(resG.resCap(*this)>0) ) { resG.graph->next(in); } |
---|
551 | } |
---|
552 | } |
---|
553 | operator Edge() const { |
---|
554 | // Edge e; |
---|
555 | // e.forward=this->forward; |
---|
556 | // if (this->forward) e=out; else e=in; |
---|
557 | // return e; |
---|
558 | if (this->forward) |
---|
559 | return Edge(out, this->forward); |
---|
560 | else |
---|
561 | return Edge(in, this->forward); |
---|
562 | } |
---|
563 | }; |
---|
564 | |
---|
565 | class InEdgeIt { |
---|
566 | friend class ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>; |
---|
567 | protected: |
---|
568 | typename Graph::OutEdgeIt out; |
---|
569 | typename Graph::InEdgeIt in; |
---|
570 | bool forward; |
---|
571 | public: |
---|
572 | InEdgeIt() { } |
---|
573 | //FIXME |
---|
574 | // OutEdgeIt(const Edge& e) : Edge(e) { } |
---|
575 | InEdgeIt(const Invalid& i) : out(i), in(i), forward(false) { } |
---|
576 | //the unique invalid iterator |
---|
577 | InEdgeIt(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& resG, Node v) { |
---|
578 | forward=true; |
---|
579 | resG.graph->first(in, v); |
---|
580 | while( resG.graph->valid(in) && !(resG.resCap(*this)>0) ) { resG.graph->next(in); } |
---|
581 | if (!resG.graph->valid(in)) { |
---|
582 | forward=false; |
---|
583 | resG.graph->first(out, v); |
---|
584 | while( resG.graph->valid(out) && !(resG.resCap(*this)>0) ) { resG.graph->next(out); } |
---|
585 | } |
---|
586 | } |
---|
587 | operator Edge() const { |
---|
588 | // Edge e; |
---|
589 | // e.forward=this->forward; |
---|
590 | // if (this->forward) e=out; else e=in; |
---|
591 | // return e; |
---|
592 | if (this->forward) |
---|
593 | return Edge(in, this->forward); |
---|
594 | else |
---|
595 | return Edge(out, this->forward); |
---|
596 | } |
---|
597 | }; |
---|
598 | |
---|
599 | class EdgeIt { |
---|
600 | friend class ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>; |
---|
601 | protected: |
---|
602 | typename Graph::EdgeIt e; |
---|
603 | bool forward; |
---|
604 | public: |
---|
605 | EdgeIt() { } |
---|
606 | EdgeIt(const Invalid& i) : e(i), forward(false) { } |
---|
607 | EdgeIt(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& resG) { |
---|
608 | forward=true; |
---|
609 | resG.graph->first(e); |
---|
610 | while (resG.graph->valid(e) && !(resG.resCap(*this)>0)) resG.graph->next(e); |
---|
611 | if (!resG.graph->valid(e)) { |
---|
612 | forward=false; |
---|
613 | resG.graph->first(e); |
---|
614 | while (resG.graph->valid(e) && !(resG.resCap(*this)>0)) resG.graph->next(e); |
---|
615 | } |
---|
616 | } |
---|
617 | operator Edge() const { |
---|
618 | return Edge(e, this->forward); |
---|
619 | } |
---|
620 | }; |
---|
621 | |
---|
622 | using GraphWrapper<Graph>::first; |
---|
623 | // NodeIt& first(NodeIt& i) const { |
---|
624 | // i=NodeIt(*this); return i; |
---|
625 | // } |
---|
626 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
627 | i=OutEdgeIt(*this, p); return i; |
---|
628 | } |
---|
629 | // FIXME not tested |
---|
630 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
631 | i=InEdgeIt(*this, p); return i; |
---|
632 | } |
---|
633 | EdgeIt& first(EdgeIt& i) const { |
---|
634 | i=EdgeIt(*this); return i; |
---|
635 | } |
---|
636 | |
---|
637 | using GraphWrapper<Graph>::next; |
---|
638 | // NodeIt& next(NodeIt& n) const { GraphWrapper<Graph>::next(n); return n; } |
---|
639 | OutEdgeIt& next(OutEdgeIt& e) const { |
---|
640 | if (e.forward) { |
---|
641 | Node v=graph->aNode(e.out); |
---|
642 | graph->next(e.out); |
---|
643 | while( graph->valid(e.out) && !(resCap(e)>0) ) { graph->next(e.out); } |
---|
644 | if (!graph->valid(e.out)) { |
---|
645 | e.forward=false; |
---|
646 | graph->first(e.in, v); |
---|
647 | while( graph->valid(e.in) && !(resCap(e)>0) ) { graph->next(e.in); } |
---|
648 | } |
---|
649 | } else { |
---|
650 | graph->next(e.in); |
---|
651 | while( graph->valid(e.in) && !(resCap(e)>0) ) { graph->next(e.in); } |
---|
652 | } |
---|
653 | return e; |
---|
654 | } |
---|
655 | // FIXME Not tested |
---|
656 | InEdgeIt& next(InEdgeIt& e) const { |
---|
657 | if (e.forward) { |
---|
658 | Node v=graph->aNode(e.in); |
---|
659 | graph->next(e.in); |
---|
660 | while( graph->valid(e.in) && !(resCap(e)>0) ) { graph->next(e.in); } |
---|
661 | if (!graph->valid(e.in)) { |
---|
662 | e.forward=false; |
---|
663 | graph->first(e.out, v); |
---|
664 | while( graph->valid(e.out) && !(resCap(e)>0) ) { graph->next(e.out); } |
---|
665 | } |
---|
666 | } else { |
---|
667 | graph->next(e.out); |
---|
668 | while( graph->valid(e.out) && !(resCap(e)>0) ) { graph->next(e.out); } |
---|
669 | } |
---|
670 | return e; |
---|
671 | } |
---|
672 | EdgeIt& next(EdgeIt& e) const { |
---|
673 | if (e.forward) { |
---|
674 | graph->next(e.e); |
---|
675 | while( graph->valid(e.e) && !(resCap(e)>0) ) { graph->next(e.e); } |
---|
676 | if (!graph->valid(e.e)) { |
---|
677 | e.forward=false; |
---|
678 | graph->first(e.e); |
---|
679 | while( graph->valid(e.e) && !(resCap(e)>0) ) { graph->next(e.e); } |
---|
680 | } |
---|
681 | } else { |
---|
682 | graph->next(e.e); |
---|
683 | while( graph->valid(e.e) && !(resCap(e)>0) ) { graph->next(e.e); } |
---|
684 | } |
---|
685 | return e; |
---|
686 | } |
---|
687 | |
---|
688 | Node tail(Edge e) const { |
---|
689 | return ((e.forward) ? graph->tail(e) : graph->head(e)); } |
---|
690 | Node head(Edge e) const { |
---|
691 | return ((e.forward) ? graph->head(e) : graph->tail(e)); } |
---|
692 | |
---|
693 | Node aNode(OutEdgeIt e) const { |
---|
694 | return ((e.forward) ? graph->aNode(e.out) : graph->aNode(e.in)); } |
---|
695 | Node bNode(OutEdgeIt e) const { |
---|
696 | return ((e.forward) ? graph->bNode(e.out) : graph->bNode(e.in)); } |
---|
697 | |
---|
698 | // int nodeNum() const { return graph->nodeNum(); } |
---|
699 | //FIXME |
---|
700 | void edgeNum() const { } |
---|
701 | //int edgeNum() const { return graph->edgeNum(); } |
---|
702 | |
---|
703 | |
---|
704 | // int id(Node v) const { return graph->id(v); } |
---|
705 | |
---|
706 | bool valid(Node n) const { return GraphWrapper<Graph>::valid(n); } |
---|
707 | bool valid(Edge e) const { |
---|
708 | return graph->valid(e); |
---|
709 | //return e.forward ? graph->valid(e.out) : graph->valid(e.in); |
---|
710 | } |
---|
711 | |
---|
712 | void augment(const Edge& e, Number a) const { |
---|
713 | if (e.forward) |
---|
714 | // flow->set(e.out, flow->get(e.out)+a); |
---|
715 | flow->set(e, (*flow)[e]+a); |
---|
716 | else |
---|
717 | // flow->set(e.in, flow->get(e.in)-a); |
---|
718 | flow->set(e, (*flow)[e]-a); |
---|
719 | } |
---|
720 | |
---|
721 | Number resCap(const Edge& e) const { |
---|
722 | if (e.forward) |
---|
723 | // return (capacity->get(e.out)-flow->get(e.out)); |
---|
724 | return ((*capacity)[e]-(*flow)[e]); |
---|
725 | else |
---|
726 | // return (flow->get(e.in)); |
---|
727 | return ((*flow)[e]); |
---|
728 | } |
---|
729 | |
---|
730 | // Number resCap(typename Graph::OutEdgeIt out) const { |
---|
731 | // // return (capacity->get(out)-flow->get(out)); |
---|
732 | // return ((*capacity)[out]-(*flow)[out]); |
---|
733 | // } |
---|
734 | |
---|
735 | // Number resCap(typename Graph::InEdgeIt in) const { |
---|
736 | // // return (flow->get(in)); |
---|
737 | // return ((*flow)[in]); |
---|
738 | // } |
---|
739 | |
---|
740 | template <typename T> |
---|
741 | class EdgeMap { |
---|
742 | typename Graph::EdgeMap<T> forward_map, backward_map; |
---|
743 | public: |
---|
744 | EdgeMap(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& _G) : forward_map(*(_G.graph)), backward_map(*(_G.graph)) { } |
---|
745 | EdgeMap(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& _G, T a) : forward_map(*(_G.graph), a), backward_map(*(_G.graph), a) { } |
---|
746 | void set(Edge e, T a) { |
---|
747 | if (e.forward) |
---|
748 | forward_map.set(e.out, a); |
---|
749 | else |
---|
750 | backward_map.set(e.in, a); |
---|
751 | } |
---|
752 | T operator[](Edge e) const { |
---|
753 | if (e.forward) |
---|
754 | return forward_map[e.out]; |
---|
755 | else |
---|
756 | return backward_map[e.in]; |
---|
757 | } |
---|
758 | // T get(Edge e) const { |
---|
759 | // if (e.out_or_in) |
---|
760 | // return forward_map.get(e.out); |
---|
761 | // else |
---|
762 | // return backward_map.get(e.in); |
---|
763 | // } |
---|
764 | }; |
---|
765 | }; |
---|
766 | |
---|
767 | /// ErasingFirstGraphWrapper for blocking flows. |
---|
768 | |
---|
769 | /// ErasingFirstGraphWrapper for blocking flows. |
---|
770 | template<typename Graph, typename FirstOutEdgesMap> |
---|
771 | class ErasingFirstGraphWrapper : public GraphWrapper<Graph> { |
---|
772 | protected: |
---|
773 | FirstOutEdgesMap* first_out_edges; |
---|
774 | public: |
---|
775 | ErasingFirstGraphWrapper(Graph& _graph, |
---|
776 | FirstOutEdgesMap& _first_out_edges) : |
---|
777 | GraphWrapper<Graph>(_graph), first_out_edges(&_first_out_edges) { } |
---|
778 | |
---|
779 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
780 | // class NodeIt { |
---|
781 | // friend class GraphWrapper<Graph>; |
---|
782 | // friend class ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>; |
---|
783 | // typename Graph::NodeIt n; |
---|
784 | // public: |
---|
785 | // NodeIt() { } |
---|
786 | // NodeIt(const typename Graph::NodeIt& _n) : n(_n) { } |
---|
787 | // NodeIt(const Invalid& i) : n(i) { } |
---|
788 | // NodeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _G) : |
---|
789 | // n(*(_G.graph)) { } |
---|
790 | // operator Node() const { return Node(typename Graph::Node(n)); } |
---|
791 | // }; |
---|
792 | typedef typename GraphWrapper<Graph>::Edge Edge; |
---|
793 | class OutEdgeIt { |
---|
794 | friend class GraphWrapper<Graph>; |
---|
795 | friend class ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>; |
---|
796 | // typedef typename Graph::OutEdgeIt GraphOutEdgeIt; |
---|
797 | typename Graph::OutEdgeIt e; |
---|
798 | public: |
---|
799 | OutEdgeIt() { } |
---|
800 | OutEdgeIt(const typename Graph::OutEdgeIt& _e) : e(_e) { } |
---|
801 | OutEdgeIt(const Invalid& i) : e(i) { } |
---|
802 | OutEdgeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _G, |
---|
803 | const Node& _n) : |
---|
804 | e((*_G.first_out_edges)[_n]) { } |
---|
805 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
806 | }; |
---|
807 | class InEdgeIt { |
---|
808 | friend class GraphWrapper<Graph>; |
---|
809 | friend class ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>; |
---|
810 | // typedef typename Graph::InEdgeIt GraphInEdgeIt; |
---|
811 | typename Graph::InEdgeIt e; |
---|
812 | public: |
---|
813 | InEdgeIt() { } |
---|
814 | InEdgeIt(const typename Graph::InEdgeIt& _e) : e(_e) { } |
---|
815 | InEdgeIt(const Invalid& i) : e(i) { } |
---|
816 | InEdgeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _G, |
---|
817 | const Node& _n) : |
---|
818 | e(*(_G.graph), typename Graph::Node(_n)) { } |
---|
819 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
820 | }; |
---|
821 | //typedef typename Graph::SymEdgeIt SymEdgeIt; |
---|
822 | class EdgeIt { |
---|
823 | friend class GraphWrapper<Graph>; |
---|
824 | friend class ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>; |
---|
825 | // typedef typename Graph::EdgeIt GraphEdgeIt; |
---|
826 | typename Graph::EdgeIt e; |
---|
827 | public: |
---|
828 | EdgeIt() { } |
---|
829 | EdgeIt(const typename Graph::EdgeIt& _e) : e(_e) { } |
---|
830 | EdgeIt(const Invalid& i) : e(i) { } |
---|
831 | EdgeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _G) : |
---|
832 | e(*(_G.graph)) { } |
---|
833 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
834 | }; |
---|
835 | |
---|
836 | using GraphWrapper<Graph>::first; |
---|
837 | // NodeIt& first(NodeIt& i) const { |
---|
838 | // i=NodeIt(*this); return i; |
---|
839 | // } |
---|
840 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
841 | i=OutEdgeIt(*this, p); return i; |
---|
842 | } |
---|
843 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
844 | i=InEdgeIt(*this, p); return i; |
---|
845 | } |
---|
846 | EdgeIt& first(EdgeIt& i) const { |
---|
847 | i=EdgeIt(*this); return i; |
---|
848 | } |
---|
849 | |
---|
850 | using GraphWrapper<Graph>::next; |
---|
851 | // NodeIt& next(NodeIt& i) const { graph->next(i.n); return i; } |
---|
852 | OutEdgeIt& next(OutEdgeIt& i) const { graph->next(i.e); return i; } |
---|
853 | InEdgeIt& next(InEdgeIt& i) const { graph->next(i.e); return i; } |
---|
854 | EdgeIt& next(EdgeIt& i) const { graph->next(i.e); return i; } |
---|
855 | |
---|
856 | Node aNode(const OutEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
---|
857 | Node aNode(const InEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
---|
858 | Node bNode(const OutEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
---|
859 | Node bNode(const InEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
---|
860 | |
---|
861 | void erase(const OutEdgeIt& e) const { |
---|
862 | OutEdgeIt f=e; |
---|
863 | this->next(f); |
---|
864 | first_out_edges->set(this->tail(e), f.e); |
---|
865 | } |
---|
866 | }; |
---|
867 | |
---|
868 | |
---|
869 | |
---|
870 | // /// experimentral, do not try it. |
---|
871 | // template<typename Graph> |
---|
872 | // class stGraphWrapper : public GraphWrapper<Graph> { |
---|
873 | // public: |
---|
874 | // class Node; |
---|
875 | // class NodeIt; |
---|
876 | // class Edge; |
---|
877 | // class OutEdgeIt; |
---|
878 | // class InEdgeIt; |
---|
879 | // class EdgeIt; |
---|
880 | |
---|
881 | // const Node s; |
---|
882 | // const Node t; |
---|
883 | |
---|
884 | // stGraphWrapper(Graph& _graph) : GraphWrapper<Graph>(_graph), |
---|
885 | // s(INVALID, 1), t(INVALID, 2) { } |
---|
886 | |
---|
887 | // class Node : public Graph::Node { |
---|
888 | // friend class GraphWrapper<Graph>; |
---|
889 | // friend class stGraphWrapper<Graph>; |
---|
890 | // protected: |
---|
891 | // int spec; //0 if real node, 1 iff s, 2 iff t |
---|
892 | // public: |
---|
893 | // Node() { } |
---|
894 | // Node(const typename Graph::Node& _n, int _spec=0) : |
---|
895 | // Graph::Node(_n), spec(_spec) { } |
---|
896 | // Node(const Invalid& i) : Graph::Node(i), spec(2) { } |
---|
897 | // //invalid: (invalid, 2); |
---|
898 | // }; |
---|
899 | |
---|
900 | // class NodeIt { |
---|
901 | // friend class GraphWrapper<Graph>; |
---|
902 | // friend class stGraphWrapper<Graph>; |
---|
903 | // typename Graph::NodeIt n; |
---|
904 | // int spec; |
---|
905 | // public: |
---|
906 | // NodeIt() { } |
---|
907 | // NodeIt(const typename Graph::NodeIt& _n, int _spec=0) : |
---|
908 | // n(_n), spec(_spec) { } |
---|
909 | // NodeIt(const Invalid& i) : n(i), spec(2) { } |
---|
910 | // NodeIt(const GraphWrapper<Graph>& _G) : n(*(_G.graph)), spec(0) { |
---|
911 | // if (!_G->valid(n)) spec=1; |
---|
912 | // } |
---|
913 | // operator Node() const { return Node(n, spec); } |
---|
914 | // }; |
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915 | // // typedef typename Graph::Edge Edge; |
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916 | // class Edge : public Graph::Edge { |
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917 | // friend class GraphWrapper<Graph>; |
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918 | // friend class stGraphWrapper<Graph>; |
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919 | // Node tail_spec; |
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920 | // Node head_spec; |
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921 | // public: |
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922 | // Edge() { } |
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923 | // Edge(const typename Graph::Edge& _e) : |
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924 | // Graph::Edge(_e), tail_spec(i, 0), head_spec(i, 0) { |
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925 | // //a tail-t es a head-et real node-ra csinaljuk |
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926 | // } |
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927 | // Edge(const Invalid& i) : Graph::Edge(i), tail_spec(i), head_spec(i) { } |
---|
928 | // }; |
---|
929 | // class OutEdgeIt { |
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930 | // friend class GraphWrapper<Graph>; |
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931 | // friend class stGraphWrapper<Graph>; |
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932 | // typename Graph::OutEdgeIt e; |
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933 | // Node tail_spec; |
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934 | // Node head_spec; |
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935 | // public: |
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936 | // OutEdgeIt() { } |
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937 | // OutEdgeIt(const typename Graph::OutEdgeIt& _e) : |
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938 | // e(_e), tail_spec(i, 0), head_spec(i, 0) { |
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939 | // //a tail-t es a head-et real node-ra csinaljuk |
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940 | // } |
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941 | // OutEdgeIt(const Invalid& i) : e(i), tail_spec(i), head_spec(i) { } |
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942 | // //invalid: (barmi, 0, 2) |
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943 | // OutEdgeIt(const GraphWrapper<Graph>& _G, const Node& _n) { |
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944 | // switch (_n.spec) { |
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945 | // case 0 : |
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946 | // e=typename Graph::OutEdgeIt(*(_G.graph), typename Graph::Node(_n)); |
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947 | // _tail.spec=0; |
---|
948 | // _head.spec=0; |
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949 | // if (!_G.graph->valid(e)) spec=1; |
---|
950 | // break; |
---|
951 | // case 1: |
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952 | // e=INVALID; |
---|
953 | // _tail.spec=1; |
---|
954 | // _head(_G.graph->first(typename Graph::NodeIt())); |
---|
955 | // if _head.spec==1 |
---|
956 | // break; |
---|
957 | // }; |
---|
958 | |
---|
959 | // } |
---|
960 | // operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
961 | // }; |
---|
962 | // class InEdgeIt { |
---|
963 | // friend class GraphWrapper<Graph>; |
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964 | // typename Graph::InEdgeIt e; |
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965 | // public: |
---|
966 | // InEdgeIt() { } |
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967 | // InEdgeIt(const typename Graph::InEdgeIt& _e) : e(_e) { } |
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968 | // InEdgeIt(const Invalid& i) : e(i) { } |
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969 | // InEdgeIt(const GraphWrapper<Graph>& _G, const Node& _n) : |
---|
970 | // e(*(_G.graph), typename Graph::Node(_n)) { } |
---|
971 | // operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
972 | // }; |
---|
973 | // //typedef typename Graph::SymEdgeIt SymEdgeIt; |
---|
974 | // class EdgeIt { |
---|
975 | // friend class GraphWrapper<Graph>; |
---|
976 | // typename Graph::EdgeIt e; |
---|
977 | // public: |
---|
978 | // EdgeIt() { } |
---|
979 | // EdgeIt(const typename Graph::EdgeIt& _e) : e(_e) { } |
---|
980 | // EdgeIt(const Invalid& i) : e(i) { } |
---|
981 | // EdgeIt(const GraphWrapper<Graph>& _G) : e(*(_G.graph)) { } |
---|
982 | // operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
983 | // }; |
---|
984 | |
---|
985 | // NodeIt& first(NodeIt& i) const { |
---|
986 | // i=NodeIt(*this); return i; |
---|
987 | // } |
---|
988 | // OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
989 | // i=OutEdgeIt(*this, p); return i; |
---|
990 | // } |
---|
991 | // InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
992 | // i=InEdgeIt(*this, p); return i; |
---|
993 | // } |
---|
994 | // EdgeIt& first(EdgeIt& i) const { |
---|
995 | // i=EdgeIt(*this); return i; |
---|
996 | // } |
---|
997 | |
---|
998 | // NodeIt& next(NodeIt& i) const { graph->next(i.n); return i; } |
---|
999 | // OutEdgeIt& next(OutEdgeIt& i) const { graph->next(i.e); return i; } |
---|
1000 | // InEdgeIt& next(InEdgeIt& i) const { graph->next(i.e); return i; } |
---|
1001 | // EdgeIt& next(EdgeIt& i) const { graph->next(i.e); return i; } |
---|
1002 | |
---|
1003 | // Node head(const Edge& e) const { |
---|
1004 | // return Node(graph->head(static_cast<typename Graph::Edge>(e))); } |
---|
1005 | // Node tail(const Edge& e) const { |
---|
1006 | // return Node(graph->tail(static_cast<typename Graph::Edge>(e))); } |
---|
1007 | |
---|
1008 | // bool valid(const Node& n) const { |
---|
1009 | // return graph->valid(static_cast<typename Graph::Node>(n)); } |
---|
1010 | // bool valid(const Edge& e) const { |
---|
1011 | // return graph->valid(static_cast<typename Graph::Edge>(e)); } |
---|
1012 | |
---|
1013 | // int nodeNum() const { return graph->nodeNum(); } |
---|
1014 | // int edgeNum() const { return graph->edgeNum(); } |
---|
1015 | |
---|
1016 | // Node aNode(const OutEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
---|
1017 | // Node aNode(const InEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
---|
1018 | // Node bNode(const OutEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
---|
1019 | // Node bNode(const InEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
---|
1020 | |
---|
1021 | // Node addNode() const { return Node(graph->addNode()); } |
---|
1022 | // Edge addEdge(const Node& tail, const Node& head) const { |
---|
1023 | // return Edge(graph->addEdge(tail, head)); } |
---|
1024 | |
---|
1025 | // void erase(const Node& i) const { graph->erase(i); } |
---|
1026 | // void erase(const Edge& i) const { graph->erase(i); } |
---|
1027 | |
---|
1028 | // void clear() const { graph->clear(); } |
---|
1029 | |
---|
1030 | // template<typename T> class NodeMap : public Graph::NodeMap<T> { |
---|
1031 | // public: |
---|
1032 | // NodeMap(const GraphWrapper<Graph>& _G) : |
---|
1033 | // Graph::NodeMap<T>(*(_G.graph)) { } |
---|
1034 | // NodeMap(const GraphWrapper<Graph>& _G, T a) : |
---|
1035 | // Graph::NodeMap<T>(*(_G.graph), a) { } |
---|
1036 | // }; |
---|
1037 | |
---|
1038 | // template<typename T> class EdgeMap : public Graph::EdgeMap<T> { |
---|
1039 | // public: |
---|
1040 | // EdgeMap(const GraphWrapper<Graph>& _G) : |
---|
1041 | // Graph::EdgeMap<T>(*(_G.graph)) { } |
---|
1042 | // EdgeMap(const GraphWrapper<Graph>& _G, T a) : |
---|
1043 | // Graph::EdgeMap<T>(*(_G.graph), a) { } |
---|
1044 | // }; |
---|
1045 | // }; |
---|
1046 | |
---|
1047 | } //namespace hugo |
---|
1048 | |
---|
1049 | #endif //HUGO_GRAPH_WRAPPER_H |
---|
1050 | |
---|