[906] | 1 | /* -*- C++ -*- |
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| 2 | * src/hugo/graph_wrapper.h - Part of HUGOlib, a generic C++ optimization library |
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| 3 | * |
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| 4 | * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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| 5 | * (Egervary Combinatorial Optimization Research Group, EGRES). |
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| 6 | * |
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| 7 | * Permission to use, modify and distribute this software is granted |
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| 8 | * provided that this copyright notice appears in all copies. For |
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| 9 | * precise terms see the accompanying LICENSE file. |
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| 10 | * |
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| 11 | * This software is provided "AS IS" with no warranty of any kind, |
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| 12 | * express or implied, and with no claim as to its suitability for any |
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| 13 | * purpose. |
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| 14 | * |
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| 15 | */ |
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| 16 | |
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[556] | 17 | #ifndef HUGO_GRAPH_WRAPPER_H |
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| 18 | #define HUGO_GRAPH_WRAPPER_H |
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| 19 | |
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| 20 | ///\ingroup gwrappers |
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| 21 | ///\file |
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| 22 | ///\brief Several graph wrappers. |
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| 23 | /// |
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| 24 | ///This file contains several useful graph wrapper functions. |
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| 25 | /// |
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| 26 | ///\author Marton Makai |
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| 27 | |
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| 28 | #include <hugo/invalid.h> |
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[650] | 29 | #include <hugo/maps.h> |
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[910] | 30 | #include <hugo/map_defines.h> |
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[774] | 31 | #include <iostream> |
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[556] | 32 | |
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| 33 | namespace hugo { |
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| 34 | |
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| 35 | // Graph wrappers |
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| 36 | |
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| 37 | /// \addtogroup gwrappers |
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| 38 | /// A main parts of HUGOlib are the different graph structures, |
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| 39 | /// generic graph algorithms, graph concepts which couple these, and |
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| 40 | /// graph wrappers. While the previous ones are more or less clear, the |
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| 41 | /// latter notion needs further explanation. |
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| 42 | /// Graph wrappers are graph classes which serve for considering graph |
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| 43 | /// structures in different ways. A short example makes the notion much |
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| 44 | /// clearer. |
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| 45 | /// Suppose that we have an instance \c g of a directed graph |
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| 46 | /// type say \c ListGraph and an algorithm |
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| 47 | /// \code template<typename Graph> int algorithm(const Graph&); \endcode |
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| 48 | /// is needed to run on the reversely oriented graph. |
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| 49 | /// It may be expensive (in time or in memory usage) to copy |
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| 50 | /// \c g with the reverse orientation. |
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| 51 | /// Thus, a wrapper class |
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| 52 | /// \code template<typename Graph> class RevGraphWrapper; \endcode is used. |
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| 53 | /// The code looks as follows |
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| 54 | /// \code |
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| 55 | /// ListGraph g; |
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| 56 | /// RevGraphWrapper<ListGraph> rgw(g); |
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| 57 | /// int result=algorithm(rgw); |
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| 58 | /// \endcode |
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| 59 | /// After running the algorithm, the original graph \c g |
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| 60 | /// remains untouched. Thus the graph wrapper used above is to consider the |
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| 61 | /// original graph with reverse orientation. |
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| 62 | /// This techniques gives rise to an elegant code, and |
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| 63 | /// based on stable graph wrappers, complex algorithms can be |
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| 64 | /// implemented easily. |
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| 65 | /// In flow, circulation and bipartite matching problems, the residual |
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| 66 | /// graph is of particular importance. Combining a wrapper implementing |
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| 67 | /// this, shortest path algorithms and minimum mean cycle algorithms, |
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| 68 | /// a range of weighted and cardinality optimization algorithms can be |
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| 69 | /// obtained. For lack of space, for other examples, |
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| 70 | /// the interested user is referred to the detailed documentation of graph |
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| 71 | /// wrappers. |
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| 72 | /// The behavior of graph wrappers can be very different. Some of them keep |
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| 73 | /// capabilities of the original graph while in other cases this would be |
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| 74 | /// meaningless. This means that the concepts that they are a model of depend |
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| 75 | /// on the graph wrapper, and the wrapped graph(s). |
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| 76 | /// If an edge of \c rgw is deleted, this is carried out by |
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| 77 | /// deleting the corresponding edge of \c g. But for a residual |
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| 78 | /// graph, this operation has no sense. |
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| 79 | /// Let we stand one more example here to simplify your work. |
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| 80 | /// wrapper class |
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| 81 | /// \code template<typename Graph> class RevGraphWrapper; \endcode |
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| 82 | /// has constructor |
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| 83 | /// <tt> RevGraphWrapper(Graph& _g)</tt>. |
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| 84 | /// This means that in a situation, |
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| 85 | /// when a <tt> const ListGraph& </tt> reference to a graph is given, |
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| 86 | /// then it have to be instantiated with <tt>Graph=const ListGraph</tt>. |
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| 87 | /// \code |
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| 88 | /// int algorithm1(const ListGraph& g) { |
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| 89 | /// RevGraphWrapper<const ListGraph> rgw(g); |
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| 90 | /// return algorithm2(rgw); |
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| 91 | /// } |
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| 92 | /// \endcode |
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| 93 | |
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| 94 | /// \addtogroup gwrappers |
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| 95 | /// @{ |
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| 96 | |
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| 97 | ///Base type for the Graph Wrappers |
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| 98 | |
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[879] | 99 | ///\warning Graph wrappers are in even more experimental state than the other |
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| 100 | ///parts of the lib. Use them at you own risk. |
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| 101 | /// |
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[556] | 102 | ///This is the base type for the Graph Wrappers. |
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| 103 | ///\todo Some more docs... |
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| 104 | /// |
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[612] | 105 | ///\author Marton Makai |
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[556] | 106 | template<typename Graph> |
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| 107 | class GraphWrapper { |
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| 108 | protected: |
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| 109 | Graph* graph; |
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| 110 | GraphWrapper() : graph(0) { } |
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| 111 | void setGraph(Graph& _graph) { graph=&_graph; } |
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| 112 | |
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| 113 | public: |
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| 114 | typedef Graph BaseGraph; |
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| 115 | typedef Graph ParentGraph; |
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| 116 | |
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| 117 | GraphWrapper(Graph& _graph) : graph(&_graph) { } |
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[774] | 118 | GraphWrapper(const GraphWrapper<Graph>& gw) : graph(gw.graph) { } |
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[556] | 119 | |
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[774] | 120 | typedef typename Graph::Node Node; |
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| 121 | class NodeIt : public Node { |
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| 122 | const GraphWrapper<Graph>* gw; |
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[556] | 123 | friend class GraphWrapper<Graph>; |
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| 124 | public: |
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| 125 | NodeIt() { } |
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[774] | 126 | NodeIt(Invalid i) : Node(i) { } |
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| 127 | NodeIt(const GraphWrapper<Graph>& _gw) : |
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| 128 | Node(typename Graph::NodeIt(*(_gw.graph))), gw(&_gw) { } |
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| 129 | NodeIt(const GraphWrapper<Graph>& _gw, const Node& n) : |
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| 130 | Node(n), gw(&_gw) { } |
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| 131 | NodeIt& operator++() { |
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| 132 | *(static_cast<Node*>(this))= |
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| 133 | ++(typename Graph::NodeIt(*(gw->graph), *this)); |
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| 134 | return *this; |
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| 135 | } |
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[556] | 136 | }; |
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[774] | 137 | typedef typename Graph::Edge Edge; |
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| 138 | class OutEdgeIt : public Edge { |
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| 139 | const GraphWrapper<Graph>* gw; |
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[556] | 140 | friend class GraphWrapper<Graph>; |
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[774] | 141 | public: |
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| 142 | OutEdgeIt() { } |
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| 143 | OutEdgeIt(Invalid i) : Edge(i) { } |
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| 144 | OutEdgeIt(const GraphWrapper<Graph>& _gw, const Node& n) : |
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| 145 | Edge(typename Graph::OutEdgeIt(*(_gw.graph), n)), gw(&_gw) { } |
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| 146 | OutEdgeIt(const GraphWrapper<Graph>& _gw, const Edge& e) : |
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| 147 | Edge(e), gw(&_gw) { } |
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| 148 | OutEdgeIt& operator++() { |
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| 149 | *(static_cast<Edge*>(this))= |
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| 150 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
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| 151 | return *this; |
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| 152 | } |
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[556] | 153 | }; |
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[774] | 154 | class InEdgeIt : public Edge { |
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| 155 | const GraphWrapper<Graph>* gw; |
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[556] | 156 | friend class GraphWrapper<Graph>; |
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[774] | 157 | public: |
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[556] | 158 | InEdgeIt() { } |
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[774] | 159 | InEdgeIt(Invalid i) : Edge(i) { } |
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| 160 | InEdgeIt(const GraphWrapper<Graph>& _gw, const Node& n) : |
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| 161 | Edge(typename Graph::InEdgeIt(*(_gw.graph), n)), gw(&_gw) { } |
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| 162 | InEdgeIt(const GraphWrapper<Graph>& _gw, const Edge& e) : |
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| 163 | Edge(e), gw(&_gw) { } |
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| 164 | InEdgeIt& operator++() { |
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| 165 | *(static_cast<Edge*>(this))= |
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| 166 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
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| 167 | return *this; |
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| 168 | } |
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[556] | 169 | }; |
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[774] | 170 | class EdgeIt : public Edge { |
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| 171 | const GraphWrapper<Graph>* gw; |
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[556] | 172 | friend class GraphWrapper<Graph>; |
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[774] | 173 | public: |
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[556] | 174 | EdgeIt() { } |
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[774] | 175 | EdgeIt(Invalid i) : Edge(i) { } |
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| 176 | EdgeIt(const GraphWrapper<Graph>& _gw) : |
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| 177 | Edge(typename Graph::EdgeIt(*(_gw.graph))), gw(&_gw) { } |
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| 178 | EdgeIt(const GraphWrapper<Graph>& _gw, const Edge& e) : |
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[777] | 179 | Edge(e), gw(&_gw) { } |
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[774] | 180 | EdgeIt& operator++() { |
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| 181 | *(static_cast<Edge*>(this))= |
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| 182 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
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| 183 | return *this; |
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| 184 | } |
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[556] | 185 | }; |
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| 186 | |
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| 187 | NodeIt& first(NodeIt& i) const { |
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| 188 | i=NodeIt(*this); return i; |
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| 189 | } |
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| 190 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
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| 191 | i=OutEdgeIt(*this, p); return i; |
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| 192 | } |
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| 193 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
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| 194 | i=InEdgeIt(*this, p); return i; |
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| 195 | } |
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| 196 | EdgeIt& first(EdgeIt& i) const { |
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| 197 | i=EdgeIt(*this); return i; |
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| 198 | } |
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| 199 | |
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| 200 | Node tail(const Edge& e) const { |
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| 201 | return Node(graph->tail(static_cast<typename Graph::Edge>(e))); } |
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| 202 | Node head(const Edge& e) const { |
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| 203 | return Node(graph->head(static_cast<typename Graph::Edge>(e))); } |
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| 204 | |
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| 205 | int nodeNum() const { return graph->nodeNum(); } |
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| 206 | int edgeNum() const { return graph->edgeNum(); } |
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| 207 | |
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| 208 | Node addNode() const { return Node(graph->addNode()); } |
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| 209 | Edge addEdge(const Node& tail, const Node& head) const { |
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| 210 | return Edge(graph->addEdge(tail, head)); } |
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| 211 | |
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| 212 | void erase(const Node& i) const { graph->erase(i); } |
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| 213 | void erase(const Edge& i) const { graph->erase(i); } |
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| 214 | |
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| 215 | void clear() const { graph->clear(); } |
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| 216 | |
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[736] | 217 | bool forward(const Edge& e) const { return graph->forward(e); } |
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| 218 | bool backward(const Edge& e) const { return graph->backward(e); } |
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[739] | 219 | |
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| 220 | int id(const Node& v) const { return graph->id(v); } |
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| 221 | int id(const Edge& e) const { return graph->id(e); } |
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[650] | 222 | |
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[738] | 223 | Edge opposite(const Edge& e) const { return Edge(graph->opposite(e)); } |
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[650] | 224 | |
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[556] | 225 | |
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[877] | 226 | IMPORT_NODE_MAP(Graph, *(gw.graph), GraphWrapper, gw); |
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| 227 | IMPORT_EDGE_MAP(Graph, *(gw.graph), GraphWrapper, gw); |
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| 228 | |
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| 229 | |
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[556] | 230 | }; |
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| 231 | |
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[569] | 232 | |
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| 233 | |
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[556] | 234 | /// A graph wrapper which reverses the orientation of the edges. |
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| 235 | |
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[879] | 236 | ///\warning Graph wrappers are in even more experimental state than the other |
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| 237 | ///parts of the lib. Use them at you own risk. |
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| 238 | /// |
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[556] | 239 | /// A graph wrapper which reverses the orientation of the edges. |
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[612] | 240 | /// Thus \c Graph have to be a directed graph type. |
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[556] | 241 | /// |
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| 242 | ///\author Marton Makai |
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| 243 | template<typename Graph> |
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| 244 | class RevGraphWrapper : public GraphWrapper<Graph> { |
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[650] | 245 | public: |
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| 246 | typedef GraphWrapper<Graph> Parent; |
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[556] | 247 | protected: |
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[612] | 248 | RevGraphWrapper() : GraphWrapper<Graph>() { } |
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[556] | 249 | public: |
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| 250 | RevGraphWrapper(Graph& _graph) : GraphWrapper<Graph>(_graph) { } |
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[774] | 251 | RevGraphWrapper(const RevGraphWrapper<Graph>& gw) : Parent(gw) { } |
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[556] | 252 | |
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| 253 | typedef typename GraphWrapper<Graph>::Node Node; |
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| 254 | typedef typename GraphWrapper<Graph>::Edge Edge; |
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[792] | 255 | //remark: OutEdgeIt and InEdgeIt cannot be typedef-ed to each other |
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| 256 | //because this does not work is some of them are not defined in the |
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| 257 | //original graph. The problem with this is that typedef-ed stuff |
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| 258 | //are instantiated in c++. |
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[774] | 259 | class OutEdgeIt : public Edge { |
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| 260 | const RevGraphWrapper<Graph>* gw; |
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[556] | 261 | friend class GraphWrapper<Graph>; |
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[774] | 262 | public: |
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[556] | 263 | OutEdgeIt() { } |
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[774] | 264 | OutEdgeIt(Invalid i) : Edge(i) { } |
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| 265 | OutEdgeIt(const RevGraphWrapper<Graph>& _gw, const Node& n) : |
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| 266 | Edge(typename Graph::InEdgeIt(*(_gw.graph), n)), gw(&_gw) { } |
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| 267 | OutEdgeIt(const RevGraphWrapper<Graph>& _gw, const Edge& e) : |
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| 268 | Edge(e), gw(&_gw) { } |
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| 269 | OutEdgeIt& operator++() { |
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| 270 | *(static_cast<Edge*>(this))= |
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| 271 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
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| 272 | return *this; |
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| 273 | } |
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[556] | 274 | }; |
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[774] | 275 | class InEdgeIt : public Edge { |
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| 276 | const RevGraphWrapper<Graph>* gw; |
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[556] | 277 | friend class GraphWrapper<Graph>; |
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[774] | 278 | public: |
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[556] | 279 | InEdgeIt() { } |
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[774] | 280 | InEdgeIt(Invalid i) : Edge(i) { } |
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| 281 | InEdgeIt(const RevGraphWrapper<Graph>& _gw, const Node& n) : |
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| 282 | Edge(typename Graph::OutEdgeIt(*(_gw.graph), n)), gw(&_gw) { } |
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| 283 | InEdgeIt(const RevGraphWrapper<Graph>& _gw, const Edge& e) : |
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| 284 | Edge(e), gw(&_gw) { } |
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| 285 | InEdgeIt& operator++() { |
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| 286 | *(static_cast<Edge*>(this))= |
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| 287 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
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| 288 | return *this; |
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| 289 | } |
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[556] | 290 | }; |
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| 291 | |
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| 292 | using GraphWrapper<Graph>::first; |
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| 293 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
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| 294 | i=OutEdgeIt(*this, p); return i; |
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| 295 | } |
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| 296 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
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| 297 | i=InEdgeIt(*this, p); return i; |
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| 298 | } |
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| 299 | |
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| 300 | Node tail(const Edge& e) const { |
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| 301 | return GraphWrapper<Graph>::head(e); } |
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| 302 | Node head(const Edge& e) const { |
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| 303 | return GraphWrapper<Graph>::tail(e); } |
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| 304 | |
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[891] | 305 | // KEEP_MAPS(Parent, RevGraphWrapper); |
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[877] | 306 | |
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[556] | 307 | }; |
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| 308 | |
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[775] | 309 | |
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| 310 | |
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[612] | 311 | /// A graph wrapper for hiding nodes and edges from a graph. |
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[556] | 312 | |
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[879] | 313 | ///\warning Graph wrappers are in even more experimental state than the other |
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| 314 | ///parts of the lib. Use them at you own risk. |
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| 315 | /// |
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[556] | 316 | /// This wrapper shows a graph with filtered node-set and |
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[838] | 317 | /// edge-set. Given a bool-valued map on the node-set and one on |
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[910] | 318 | /// the edge-set of the graphs, the iterators show only the objects |
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[838] | 319 | /// having true value. |
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| 320 | /// The quick brown fox iterators jump over |
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| 321 | /// the lazy dog nodes or edges if their values for are false in the |
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| 322 | /// corresponding bool maps. |
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[556] | 323 | /// |
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| 324 | ///\author Marton Makai |
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| 325 | template<typename Graph, typename NodeFilterMap, |
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| 326 | typename EdgeFilterMap> |
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| 327 | class SubGraphWrapper : public GraphWrapper<Graph> { |
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[650] | 328 | public: |
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| 329 | typedef GraphWrapper<Graph> Parent; |
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[556] | 330 | protected: |
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| 331 | NodeFilterMap* node_filter_map; |
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| 332 | EdgeFilterMap* edge_filter_map; |
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| 333 | |
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[612] | 334 | SubGraphWrapper() : GraphWrapper<Graph>(), |
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[556] | 335 | node_filter_map(0), edge_filter_map(0) { } |
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| 336 | void setNodeFilterMap(NodeFilterMap& _node_filter_map) { |
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| 337 | node_filter_map=&_node_filter_map; |
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| 338 | } |
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| 339 | void setEdgeFilterMap(EdgeFilterMap& _edge_filter_map) { |
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| 340 | edge_filter_map=&_edge_filter_map; |
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| 341 | } |
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| 342 | |
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| 343 | public: |
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| 344 | SubGraphWrapper(Graph& _graph, NodeFilterMap& _node_filter_map, |
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| 345 | EdgeFilterMap& _edge_filter_map) : |
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| 346 | GraphWrapper<Graph>(_graph), node_filter_map(&_node_filter_map), |
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| 347 | edge_filter_map(&_edge_filter_map) { } |
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| 348 | |
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| 349 | typedef typename GraphWrapper<Graph>::Node Node; |
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[775] | 350 | class NodeIt : public Node { |
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| 351 | const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>* gw; |
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[556] | 352 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
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[775] | 353 | public: |
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[556] | 354 | NodeIt() { } |
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[775] | 355 | NodeIt(Invalid i) : Node(i) { } |
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| 356 | NodeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _gw) : |
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[854] | 357 | Node(typename Graph::NodeIt(*(_gw.graph))), gw(&_gw) { |
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| 358 | while (*static_cast<Node*>(this)!=INVALID && |
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[861] | 359 | !(*(gw->node_filter_map))[*this]) |
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[854] | 360 | *(static_cast<Node*>(this))= |
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| 361 | ++(typename Graph::NodeIt(*(gw->graph), *this)); |
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| 362 | } |
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[775] | 363 | NodeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _gw, |
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| 364 | const Node& n) : |
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| 365 | Node(n), gw(&_gw) { } |
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| 366 | NodeIt& operator++() { |
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| 367 | *(static_cast<Node*>(this))= |
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| 368 | ++(typename Graph::NodeIt(*(gw->graph), *this)); |
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| 369 | while (*static_cast<Node*>(this)!=INVALID && |
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| 370 | !(*(gw->node_filter_map))[*this]) |
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| 371 | *(static_cast<Node*>(this))= |
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| 372 | ++(typename Graph::NodeIt(*(gw->graph), *this)); |
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| 373 | return *this; |
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[556] | 374 | } |
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| 375 | }; |
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| 376 | typedef typename GraphWrapper<Graph>::Edge Edge; |
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[775] | 377 | class OutEdgeIt : public Edge { |
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| 378 | const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>* gw; |
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[556] | 379 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
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| 380 | public: |
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| 381 | OutEdgeIt() { } |
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[775] | 382 | OutEdgeIt(Invalid i) : Edge(i) { } |
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| 383 | OutEdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _gw, const Node& n) : |
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[854] | 384 | Edge(typename Graph::OutEdgeIt(*(_gw.graph), n)), gw(&_gw) { |
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| 385 | while (*static_cast<Edge*>(this)!=INVALID && |
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| 386 | !(*(gw->edge_filter_map))[*this]) |
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| 387 | *(static_cast<Edge*>(this))= |
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| 388 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
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| 389 | } |
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[775] | 390 | OutEdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _gw, |
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| 391 | const Edge& e) : |
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| 392 | Edge(e), gw(&_gw) { } |
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| 393 | OutEdgeIt& operator++() { |
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| 394 | *(static_cast<Edge*>(this))= |
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| 395 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
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| 396 | while (*static_cast<Edge*>(this)!=INVALID && |
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| 397 | !(*(gw->edge_filter_map))[*this]) |
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| 398 | *(static_cast<Edge*>(this))= |
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| 399 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
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| 400 | return *this; |
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[556] | 401 | } |
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| 402 | }; |
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[775] | 403 | class InEdgeIt : public Edge { |
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| 404 | const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>* gw; |
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[556] | 405 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
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| 406 | public: |
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| 407 | InEdgeIt() { } |
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[775] | 408 | // InEdgeIt(const InEdgeIt& e) : Edge(e), gw(e.gw) { } |
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| 409 | InEdgeIt(Invalid i) : Edge(i) { } |
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| 410 | InEdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _gw, const Node& n) : |
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[854] | 411 | Edge(typename Graph::InEdgeIt(*(_gw.graph), n)), gw(&_gw) { |
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| 412 | while (*static_cast<Edge*>(this)!=INVALID && |
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| 413 | !(*(gw->edge_filter_map))[*this]) |
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| 414 | *(static_cast<Edge*>(this))= |
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| 415 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
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| 416 | } |
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[775] | 417 | InEdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _gw, |
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| 418 | const Edge& e) : |
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| 419 | Edge(e), gw(&_gw) { } |
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| 420 | InEdgeIt& operator++() { |
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| 421 | *(static_cast<Edge*>(this))= |
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| 422 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
---|
| 423 | while (*static_cast<Edge*>(this)!=INVALID && |
---|
| 424 | !(*(gw->edge_filter_map))[*this]) |
---|
| 425 | *(static_cast<Edge*>(this))= |
---|
| 426 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
---|
| 427 | return *this; |
---|
[556] | 428 | } |
---|
| 429 | }; |
---|
[775] | 430 | class EdgeIt : public Edge { |
---|
| 431 | const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>* gw; |
---|
[556] | 432 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
---|
| 433 | public: |
---|
| 434 | EdgeIt() { } |
---|
[775] | 435 | EdgeIt(Invalid i) : Edge(i) { } |
---|
| 436 | EdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _gw) : |
---|
[854] | 437 | Edge(typename Graph::EdgeIt(*(_gw.graph))), gw(&_gw) { |
---|
| 438 | while (*static_cast<Edge*>(this)!=INVALID && |
---|
| 439 | !(*(gw->edge_filter_map))[*this]) |
---|
| 440 | *(static_cast<Edge*>(this))= |
---|
| 441 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
| 442 | } |
---|
[775] | 443 | EdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _gw, |
---|
| 444 | const Edge& e) : |
---|
| 445 | Edge(e), gw(&_gw) { } |
---|
| 446 | EdgeIt& operator++() { |
---|
| 447 | *(static_cast<Edge*>(this))= |
---|
| 448 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
| 449 | while (*static_cast<Edge*>(this)!=INVALID && |
---|
| 450 | !(*(gw->edge_filter_map))[*this]) |
---|
| 451 | *(static_cast<Edge*>(this))= |
---|
| 452 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
| 453 | return *this; |
---|
[556] | 454 | } |
---|
| 455 | }; |
---|
| 456 | |
---|
| 457 | NodeIt& first(NodeIt& i) const { |
---|
| 458 | i=NodeIt(*this); return i; |
---|
| 459 | } |
---|
| 460 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
| 461 | i=OutEdgeIt(*this, p); return i; |
---|
| 462 | } |
---|
| 463 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
| 464 | i=InEdgeIt(*this, p); return i; |
---|
| 465 | } |
---|
| 466 | EdgeIt& first(EdgeIt& i) const { |
---|
| 467 | i=EdgeIt(*this); return i; |
---|
| 468 | } |
---|
| 469 | |
---|
[561] | 470 | /// This function hides \c n in the graph, i.e. the iteration |
---|
| 471 | /// jumps over it. This is done by simply setting the value of \c n |
---|
| 472 | /// to be false in the corresponding node-map. |
---|
[556] | 473 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
---|
[561] | 474 | |
---|
| 475 | /// This function hides \c e in the graph, i.e. the iteration |
---|
| 476 | /// jumps over it. This is done by simply setting the value of \c e |
---|
| 477 | /// to be false in the corresponding edge-map. |
---|
[556] | 478 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
---|
| 479 | |
---|
[561] | 480 | /// The value of \c n is set to be true in the node-map which stores |
---|
| 481 | /// hide information. If \c n was hidden previuosly, then it is shown |
---|
| 482 | /// again |
---|
| 483 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
---|
| 484 | |
---|
| 485 | /// The value of \c e is set to be true in the edge-map which stores |
---|
| 486 | /// hide information. If \c e was hidden previuosly, then it is shown |
---|
| 487 | /// again |
---|
[556] | 488 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
---|
| 489 | |
---|
[561] | 490 | /// Returns true if \c n is hidden. |
---|
| 491 | bool hidden(const Node& n) const { return !(*node_filter_map)[n]; } |
---|
| 492 | |
---|
| 493 | /// Returns true if \c n is hidden. |
---|
| 494 | bool hidden(const Edge& e) const { return !(*edge_filter_map)[e]; } |
---|
[593] | 495 | |
---|
[792] | 496 | /// \warning This is a linear time operation and works only if |
---|
| 497 | /// \c Graph::NodeIt is defined. |
---|
[593] | 498 | int nodeNum() const { |
---|
| 499 | int i=0; |
---|
[792] | 500 | for (NodeIt n(*this); n!=INVALID; ++n) ++i; |
---|
[593] | 501 | return i; |
---|
| 502 | } |
---|
| 503 | |
---|
[792] | 504 | /// \warning This is a linear time operation and works only if |
---|
| 505 | /// \c Graph::EdgeIt is defined. |
---|
[593] | 506 | int edgeNum() const { |
---|
| 507 | int i=0; |
---|
[792] | 508 | for (EdgeIt e(*this); e!=INVALID; ++e) ++i; |
---|
[593] | 509 | return i; |
---|
| 510 | } |
---|
| 511 | |
---|
[891] | 512 | // KEEP_MAPS(Parent, SubGraphWrapper); |
---|
[556] | 513 | }; |
---|
| 514 | |
---|
[569] | 515 | |
---|
| 516 | |
---|
[556] | 517 | template<typename Graph> |
---|
| 518 | class UndirGraphWrapper : public GraphWrapper<Graph> { |
---|
[650] | 519 | public: |
---|
| 520 | typedef GraphWrapper<Graph> Parent; |
---|
[556] | 521 | protected: |
---|
| 522 | UndirGraphWrapper() : GraphWrapper<Graph>() { } |
---|
| 523 | |
---|
| 524 | public: |
---|
| 525 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
| 526 | typedef typename GraphWrapper<Graph>::NodeIt NodeIt; |
---|
| 527 | typedef typename GraphWrapper<Graph>::Edge Edge; |
---|
| 528 | typedef typename GraphWrapper<Graph>::EdgeIt EdgeIt; |
---|
| 529 | |
---|
| 530 | UndirGraphWrapper(Graph& _graph) : GraphWrapper<Graph>(_graph) { } |
---|
| 531 | |
---|
| 532 | class OutEdgeIt { |
---|
| 533 | friend class UndirGraphWrapper<Graph>; |
---|
| 534 | bool out_or_in; //true iff out |
---|
| 535 | typename Graph::OutEdgeIt out; |
---|
| 536 | typename Graph::InEdgeIt in; |
---|
| 537 | public: |
---|
| 538 | OutEdgeIt() { } |
---|
| 539 | OutEdgeIt(const Invalid& i) : Edge(i) { } |
---|
| 540 | OutEdgeIt(const UndirGraphWrapper<Graph>& _G, const Node& _n) { |
---|
| 541 | out_or_in=true; _G.graph->first(out, _n); |
---|
| 542 | if (!(_G.graph->valid(out))) { out_or_in=false; _G.graph->first(in, _n); } |
---|
| 543 | } |
---|
| 544 | operator Edge() const { |
---|
| 545 | if (out_or_in) return Edge(out); else return Edge(in); |
---|
| 546 | } |
---|
| 547 | }; |
---|
| 548 | |
---|
| 549 | typedef OutEdgeIt InEdgeIt; |
---|
| 550 | |
---|
| 551 | using GraphWrapper<Graph>::first; |
---|
| 552 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
| 553 | i=OutEdgeIt(*this, p); return i; |
---|
| 554 | } |
---|
| 555 | |
---|
| 556 | using GraphWrapper<Graph>::next; |
---|
[878] | 557 | |
---|
[556] | 558 | OutEdgeIt& next(OutEdgeIt& e) const { |
---|
| 559 | if (e.out_or_in) { |
---|
| 560 | typename Graph::Node n=this->graph->tail(e.out); |
---|
| 561 | this->graph->next(e.out); |
---|
| 562 | if (!this->graph->valid(e.out)) { |
---|
| 563 | e.out_or_in=false; this->graph->first(e.in, n); } |
---|
| 564 | } else { |
---|
| 565 | this->graph->next(e.in); |
---|
| 566 | } |
---|
| 567 | return e; |
---|
| 568 | } |
---|
| 569 | |
---|
| 570 | Node aNode(const OutEdgeIt& e) const { |
---|
| 571 | if (e.out_or_in) return this->graph->tail(e); else |
---|
| 572 | return this->graph->head(e); } |
---|
| 573 | Node bNode(const OutEdgeIt& e) const { |
---|
| 574 | if (e.out_or_in) return this->graph->head(e); else |
---|
| 575 | return this->graph->tail(e); } |
---|
[877] | 576 | |
---|
[891] | 577 | // KEEP_MAPS(Parent, UndirGraphWrapper); |
---|
[877] | 578 | |
---|
[556] | 579 | }; |
---|
| 580 | |
---|
[910] | 581 | // /// \brief An undirected graph template. |
---|
| 582 | // /// |
---|
| 583 | // ///\warning Graph wrappers are in even more experimental state than the other |
---|
| 584 | // ///parts of the lib. Use them at your own risk. |
---|
| 585 | // /// |
---|
| 586 | // /// An undirected graph template. |
---|
| 587 | // /// This class works as an undirected graph and a directed graph of |
---|
| 588 | // /// class \c Graph is used for the physical storage. |
---|
| 589 | // /// \ingroup graphs |
---|
[556] | 590 | template<typename Graph> |
---|
| 591 | class UndirGraph : public UndirGraphWrapper<Graph> { |
---|
| 592 | typedef UndirGraphWrapper<Graph> Parent; |
---|
| 593 | protected: |
---|
| 594 | Graph gr; |
---|
| 595 | public: |
---|
| 596 | UndirGraph() : UndirGraphWrapper<Graph>() { |
---|
| 597 | Parent::setGraph(gr); |
---|
| 598 | } |
---|
[877] | 599 | |
---|
[891] | 600 | // KEEP_MAPS(Parent, UndirGraph); |
---|
[556] | 601 | }; |
---|
| 602 | |
---|
[569] | 603 | |
---|
[650] | 604 | |
---|
| 605 | ///\brief A wrapper for composing a subgraph of a |
---|
[792] | 606 | /// bidirected graph made from a directed one. |
---|
[612] | 607 | /// |
---|
[911] | 608 | /// A wrapper for composing a subgraph of a |
---|
| 609 | /// bidirected graph made from a directed one. |
---|
| 610 | /// |
---|
[879] | 611 | ///\warning Graph wrappers are in even more experimental state than the other |
---|
| 612 | ///parts of the lib. Use them at you own risk. |
---|
| 613 | /// |
---|
[792] | 614 | /// Suppose that for a directed graph $G=(V, A)$, |
---|
[910] | 615 | /// two bool valued maps on the edge-set, |
---|
| 616 | /// $forward_filter$, and $backward_filter$ |
---|
[792] | 617 | /// is given, and we are dealing with the directed graph |
---|
| 618 | /// a $G'=(V, \{uv : uv\in A \mbox{ and } forward_filter(uv) \mbox{ is true}\}+\{vu : uv\in A \mbox{ and } backward_filter(uv) \mbox{ is true}\})$. |
---|
| 619 | /// The purpose of writing + instead of union is because parallel |
---|
| 620 | /// edges can arose. |
---|
| 621 | /// In other words, a subgraph of the bidirected graph obtained, which |
---|
| 622 | /// is given by orienting the edges of the original graph in both directions. |
---|
| 623 | /// An example for such a construction is the \c RevGraphWrapper where the |
---|
| 624 | /// forward_filter is everywhere false and the backward_filter is |
---|
| 625 | /// everywhere true. We note that for sake of efficiency, |
---|
| 626 | /// \c RevGraphWrapper is implemented in a different way. |
---|
| 627 | /// But BidirGraphWrapper is obtained from |
---|
| 628 | /// SubBidirGraphWrapper by considering everywhere true |
---|
[910] | 629 | /// valued maps both for forward_filter and backward_filter. |
---|
[792] | 630 | /// Finally, one of the most important applications of SubBidirGraphWrapper |
---|
| 631 | /// is ResGraphWrapper, which stands for the residual graph in directed |
---|
| 632 | /// flow and circulation problems. |
---|
| 633 | /// As wrappers usually, the SubBidirGraphWrapper implements the |
---|
| 634 | /// above mentioned graph structure without its physical storage, |
---|
| 635 | /// that is the whole stuff eats constant memory. |
---|
[910] | 636 | /// As the oppositely directed edges are logically different, |
---|
[792] | 637 | /// the maps are able to attach different values for them. |
---|
[650] | 638 | template<typename Graph, |
---|
| 639 | typename ForwardFilterMap, typename BackwardFilterMap> |
---|
| 640 | class SubBidirGraphWrapper : public GraphWrapper<Graph> { |
---|
| 641 | public: |
---|
| 642 | typedef GraphWrapper<Graph> Parent; |
---|
[569] | 643 | protected: |
---|
[650] | 644 | ForwardFilterMap* forward_filter; |
---|
| 645 | BackwardFilterMap* backward_filter; |
---|
| 646 | |
---|
[792] | 647 | SubBidirGraphWrapper() : GraphWrapper<Graph>() { } |
---|
[650] | 648 | void setForwardFilterMap(ForwardFilterMap& _forward_filter) { |
---|
| 649 | forward_filter=&_forward_filter; |
---|
| 650 | } |
---|
| 651 | void setBackwardFilterMap(BackwardFilterMap& _backward_filter) { |
---|
| 652 | backward_filter=&_backward_filter; |
---|
| 653 | } |
---|
[569] | 654 | |
---|
| 655 | public: |
---|
| 656 | |
---|
[650] | 657 | SubBidirGraphWrapper(Graph& _graph, ForwardFilterMap& _forward_filter, |
---|
| 658 | BackwardFilterMap& _backward_filter) : |
---|
| 659 | GraphWrapper<Graph>(_graph), |
---|
| 660 | forward_filter(&_forward_filter), backward_filter(&_backward_filter) { } |
---|
[774] | 661 | SubBidirGraphWrapper(const SubBidirGraphWrapper<Graph, |
---|
| 662 | ForwardFilterMap, BackwardFilterMap>& gw) : |
---|
| 663 | Parent(gw), |
---|
| 664 | forward_filter(gw.forward_filter), |
---|
| 665 | backward_filter(gw.backward_filter) { } |
---|
[569] | 666 | |
---|
| 667 | class Edge; |
---|
| 668 | class OutEdgeIt; |
---|
| 669 | friend class Edge; |
---|
| 670 | friend class OutEdgeIt; |
---|
| 671 | |
---|
[621] | 672 | template<typename T> class EdgeMap; |
---|
| 673 | |
---|
[569] | 674 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
[621] | 675 | |
---|
[774] | 676 | typedef typename Graph::Edge GraphEdge; |
---|
[792] | 677 | /// SubBidirGraphWrapper<..., ..., ...>::Edge is inherited from |
---|
[910] | 678 | /// Graph::Edge. It contains an extra bool flag which is true |
---|
| 679 | /// if and only if the |
---|
[792] | 680 | /// edge is the backward version of the original edge. |
---|
[569] | 681 | class Edge : public Graph::Edge { |
---|
[650] | 682 | friend class SubBidirGraphWrapper<Graph, |
---|
| 683 | ForwardFilterMap, BackwardFilterMap>; |
---|
[621] | 684 | template<typename T> friend class EdgeMap; |
---|
[569] | 685 | protected: |
---|
| 686 | bool backward; //true, iff backward |
---|
| 687 | public: |
---|
| 688 | Edge() { } |
---|
[792] | 689 | /// \todo =false is needed, or causes problems? |
---|
| 690 | /// If \c _backward is false, then we get an edge corresponding to the |
---|
| 691 | /// original one, otherwise its oppositely directed pair is obtained. |
---|
[774] | 692 | Edge(const typename Graph::Edge& e, bool _backward/*=false*/) : |
---|
| 693 | Graph::Edge(e), backward(_backward) { } |
---|
| 694 | Edge(Invalid i) : Graph::Edge(i), backward(true) { } |
---|
| 695 | bool operator==(const Edge& v) const { |
---|
| 696 | return (this->backward==v.backward && |
---|
| 697 | static_cast<typename Graph::Edge>(*this)== |
---|
[569] | 698 | static_cast<typename Graph::Edge>(v)); |
---|
| 699 | } |
---|
[774] | 700 | bool operator!=(const Edge& v) const { |
---|
| 701 | return (this->backward!=v.backward || |
---|
| 702 | static_cast<typename Graph::Edge>(*this)!= |
---|
[569] | 703 | static_cast<typename Graph::Edge>(v)); |
---|
[774] | 704 | } |
---|
[569] | 705 | }; |
---|
| 706 | |
---|
[774] | 707 | class OutEdgeIt : public Edge { |
---|
[650] | 708 | friend class SubBidirGraphWrapper<Graph, |
---|
| 709 | ForwardFilterMap, BackwardFilterMap>; |
---|
[569] | 710 | protected: |
---|
[774] | 711 | const SubBidirGraphWrapper<Graph, |
---|
| 712 | ForwardFilterMap, BackwardFilterMap>* gw; |
---|
[569] | 713 | public: |
---|
| 714 | OutEdgeIt() { } |
---|
[774] | 715 | OutEdgeIt(Invalid i) : Edge(i) { } |
---|
[650] | 716 | OutEdgeIt(const SubBidirGraphWrapper<Graph, |
---|
[774] | 717 | ForwardFilterMap, BackwardFilterMap>& _gw, const Node& n) : |
---|
| 718 | Edge(typename Graph::OutEdgeIt(*(_gw.graph), n), false), gw(&_gw) { |
---|
| 719 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 720 | !(*(gw->forward_filter))[*this]) |
---|
| 721 | *(static_cast<GraphEdge*>(this))= |
---|
| 722 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
---|
[775] | 723 | if (*static_cast<GraphEdge*>(this)==INVALID) { |
---|
[774] | 724 | *static_cast<Edge*>(this)= |
---|
| 725 | Edge(typename Graph::InEdgeIt(*(_gw.graph), n), true); |
---|
[775] | 726 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 727 | !(*(gw->backward_filter))[*this]) |
---|
| 728 | *(static_cast<GraphEdge*>(this))= |
---|
| 729 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
---|
| 730 | } |
---|
[774] | 731 | } |
---|
| 732 | OutEdgeIt(const SubBidirGraphWrapper<Graph, |
---|
| 733 | ForwardFilterMap, BackwardFilterMap>& _gw, const Edge& e) : |
---|
| 734 | Edge(e), gw(&_gw) { } |
---|
| 735 | OutEdgeIt& operator++() { |
---|
| 736 | if (!this->backward) { |
---|
| 737 | Node n=gw->tail(*this); |
---|
| 738 | *(static_cast<GraphEdge*>(this))= |
---|
| 739 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
---|
| 740 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 741 | !(*(gw->forward_filter))[*this]) |
---|
| 742 | *(static_cast<GraphEdge*>(this))= |
---|
| 743 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
---|
[775] | 744 | if (*static_cast<GraphEdge*>(this)==INVALID) { |
---|
[774] | 745 | *static_cast<Edge*>(this)= |
---|
| 746 | Edge(typename Graph::InEdgeIt(*(gw->graph), n), true); |
---|
[775] | 747 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 748 | !(*(gw->backward_filter))[*this]) |
---|
| 749 | *(static_cast<GraphEdge*>(this))= |
---|
| 750 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
---|
| 751 | } |
---|
[774] | 752 | } else { |
---|
| 753 | *(static_cast<GraphEdge*>(this))= |
---|
| 754 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
---|
| 755 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 756 | !(*(gw->backward_filter))[*this]) |
---|
| 757 | *(static_cast<GraphEdge*>(this))= |
---|
| 758 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
---|
[569] | 759 | } |
---|
[774] | 760 | return *this; |
---|
[569] | 761 | } |
---|
| 762 | }; |
---|
| 763 | |
---|
[774] | 764 | class InEdgeIt : public Edge { |
---|
[650] | 765 | friend class SubBidirGraphWrapper<Graph, |
---|
| 766 | ForwardFilterMap, BackwardFilterMap>; |
---|
[569] | 767 | protected: |
---|
[774] | 768 | const SubBidirGraphWrapper<Graph, |
---|
| 769 | ForwardFilterMap, BackwardFilterMap>* gw; |
---|
[569] | 770 | public: |
---|
| 771 | InEdgeIt() { } |
---|
[774] | 772 | InEdgeIt(Invalid i) : Edge(i) { } |
---|
[650] | 773 | InEdgeIt(const SubBidirGraphWrapper<Graph, |
---|
[774] | 774 | ForwardFilterMap, BackwardFilterMap>& _gw, const Node& n) : |
---|
| 775 | Edge(typename Graph::InEdgeIt(*(_gw.graph), n), false), gw(&_gw) { |
---|
| 776 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 777 | !(*(gw->forward_filter))[*this]) |
---|
| 778 | *(static_cast<GraphEdge*>(this))= |
---|
| 779 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
---|
[775] | 780 | if (*static_cast<GraphEdge*>(this)==INVALID) { |
---|
[774] | 781 | *static_cast<Edge*>(this)= |
---|
| 782 | Edge(typename Graph::OutEdgeIt(*(_gw.graph), n), true); |
---|
[775] | 783 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 784 | !(*(gw->backward_filter))[*this]) |
---|
| 785 | *(static_cast<GraphEdge*>(this))= |
---|
| 786 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
---|
| 787 | } |
---|
[774] | 788 | } |
---|
| 789 | InEdgeIt(const SubBidirGraphWrapper<Graph, |
---|
| 790 | ForwardFilterMap, BackwardFilterMap>& _gw, const Edge& e) : |
---|
| 791 | Edge(e), gw(&_gw) { } |
---|
| 792 | InEdgeIt& operator++() { |
---|
| 793 | if (!this->backward) { |
---|
[775] | 794 | Node n=gw->tail(*this); |
---|
[774] | 795 | *(static_cast<GraphEdge*>(this))= |
---|
| 796 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
---|
| 797 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 798 | !(*(gw->forward_filter))[*this]) |
---|
| 799 | *(static_cast<GraphEdge*>(this))= |
---|
| 800 | ++(typename Graph::InEdgeIt(*(gw->graph), *this)); |
---|
[775] | 801 | if (*static_cast<GraphEdge*>(this)==INVALID) { |
---|
[774] | 802 | *static_cast<Edge*>(this)= |
---|
| 803 | Edge(typename Graph::OutEdgeIt(*(gw->graph), n), true); |
---|
[775] | 804 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 805 | !(*(gw->backward_filter))[*this]) |
---|
| 806 | *(static_cast<GraphEdge*>(this))= |
---|
| 807 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
---|
| 808 | } |
---|
[774] | 809 | } else { |
---|
| 810 | *(static_cast<GraphEdge*>(this))= |
---|
| 811 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
---|
| 812 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 813 | !(*(gw->backward_filter))[*this]) |
---|
| 814 | *(static_cast<GraphEdge*>(this))= |
---|
| 815 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
---|
[569] | 816 | } |
---|
[774] | 817 | return *this; |
---|
[569] | 818 | } |
---|
| 819 | }; |
---|
| 820 | |
---|
[774] | 821 | class EdgeIt : public Edge { |
---|
[650] | 822 | friend class SubBidirGraphWrapper<Graph, |
---|
| 823 | ForwardFilterMap, BackwardFilterMap>; |
---|
[569] | 824 | protected: |
---|
[774] | 825 | const SubBidirGraphWrapper<Graph, |
---|
| 826 | ForwardFilterMap, BackwardFilterMap>* gw; |
---|
[569] | 827 | public: |
---|
| 828 | EdgeIt() { } |
---|
[774] | 829 | EdgeIt(Invalid i) : Edge(i) { } |
---|
[650] | 830 | EdgeIt(const SubBidirGraphWrapper<Graph, |
---|
[775] | 831 | ForwardFilterMap, BackwardFilterMap>& _gw) : |
---|
[892] | 832 | Edge(typename Graph::EdgeIt(*(_gw.graph)), false), gw(&_gw) { |
---|
[774] | 833 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 834 | !(*(gw->forward_filter))[*this]) |
---|
| 835 | *(static_cast<GraphEdge*>(this))= |
---|
| 836 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
[775] | 837 | if (*static_cast<GraphEdge*>(this)==INVALID) { |
---|
[774] | 838 | *static_cast<Edge*>(this)= |
---|
| 839 | Edge(typename Graph::EdgeIt(*(_gw.graph)), true); |
---|
[775] | 840 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 841 | !(*(gw->backward_filter))[*this]) |
---|
| 842 | *(static_cast<GraphEdge*>(this))= |
---|
| 843 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
| 844 | } |
---|
[774] | 845 | } |
---|
| 846 | EdgeIt(const SubBidirGraphWrapper<Graph, |
---|
| 847 | ForwardFilterMap, BackwardFilterMap>& _gw, const Edge& e) : |
---|
| 848 | Edge(e), gw(&_gw) { } |
---|
| 849 | EdgeIt& operator++() { |
---|
| 850 | if (!this->backward) { |
---|
| 851 | *(static_cast<GraphEdge*>(this))= |
---|
| 852 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
| 853 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 854 | !(*(gw->forward_filter))[*this]) |
---|
| 855 | *(static_cast<GraphEdge*>(this))= |
---|
| 856 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
[775] | 857 | if (*static_cast<GraphEdge*>(this)==INVALID) { |
---|
[774] | 858 | *static_cast<Edge*>(this)= |
---|
| 859 | Edge(typename Graph::EdgeIt(*(gw->graph)), true); |
---|
[775] | 860 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 861 | !(*(gw->backward_filter))[*this]) |
---|
| 862 | *(static_cast<GraphEdge*>(this))= |
---|
| 863 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
| 864 | } |
---|
[774] | 865 | } else { |
---|
| 866 | *(static_cast<GraphEdge*>(this))= |
---|
| 867 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
| 868 | while (*static_cast<GraphEdge*>(this)!=INVALID && |
---|
| 869 | !(*(gw->backward_filter))[*this]) |
---|
| 870 | *(static_cast<GraphEdge*>(this))= |
---|
| 871 | ++(typename Graph::EdgeIt(*(gw->graph), *this)); |
---|
[569] | 872 | } |
---|
[774] | 873 | return *this; |
---|
[569] | 874 | } |
---|
| 875 | }; |
---|
| 876 | |
---|
| 877 | using GraphWrapper<Graph>::first; |
---|
| 878 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
| 879 | i=OutEdgeIt(*this, p); return i; |
---|
| 880 | } |
---|
| 881 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
| 882 | i=InEdgeIt(*this, p); return i; |
---|
| 883 | } |
---|
| 884 | EdgeIt& first(EdgeIt& i) const { |
---|
| 885 | i=EdgeIt(*this); return i; |
---|
| 886 | } |
---|
[556] | 887 | |
---|
[569] | 888 | |
---|
| 889 | Node tail(Edge e) const { |
---|
| 890 | return ((!e.backward) ? this->graph->tail(e) : this->graph->head(e)); } |
---|
| 891 | Node head(Edge e) const { |
---|
| 892 | return ((!e.backward) ? this->graph->head(e) : this->graph->tail(e)); } |
---|
| 893 | |
---|
[572] | 894 | /// Gives back the opposite edge. |
---|
| 895 | Edge opposite(const Edge& e) const { |
---|
| 896 | Edge f=e; |
---|
| 897 | f.backward=!f.backward; |
---|
| 898 | return f; |
---|
| 899 | } |
---|
| 900 | |
---|
[792] | 901 | /// \warning This is a linear time operation and works only if |
---|
| 902 | /// \c Graph::EdgeIt is defined. |
---|
| 903 | int edgeNum() const { |
---|
| 904 | int i=0; |
---|
| 905 | for (EdgeIt e(*this); e!=INVALID; ++e) ++i; |
---|
| 906 | return i; |
---|
| 907 | } |
---|
[569] | 908 | |
---|
| 909 | bool forward(const Edge& e) const { return !e.backward; } |
---|
| 910 | bool backward(const Edge& e) const { return e.backward; } |
---|
| 911 | |
---|
| 912 | |
---|
| 913 | template <typename T> |
---|
[792] | 914 | /// \c SubBidirGraphWrapper<..., ..., ...>::EdgeMap contains two |
---|
| 915 | /// Graph::EdgeMap one for the forward edges and |
---|
| 916 | /// one for the backward edges. |
---|
[569] | 917 | class EdgeMap { |
---|
[891] | 918 | template <typename TT> friend class EdgeMap; |
---|
[569] | 919 | typename Graph::template EdgeMap<T> forward_map, backward_map; |
---|
| 920 | public: |
---|
[623] | 921 | typedef T ValueType; |
---|
| 922 | typedef Edge KeyType; |
---|
[891] | 923 | |
---|
[650] | 924 | EdgeMap(const SubBidirGraphWrapper<Graph, |
---|
[774] | 925 | ForwardFilterMap, BackwardFilterMap>& g) : |
---|
| 926 | forward_map(*(g.graph)), backward_map(*(g.graph)) { } |
---|
[891] | 927 | |
---|
[650] | 928 | EdgeMap(const SubBidirGraphWrapper<Graph, |
---|
[774] | 929 | ForwardFilterMap, BackwardFilterMap>& g, T a) : |
---|
| 930 | forward_map(*(g.graph), a), backward_map(*(g.graph), a) { } |
---|
[891] | 931 | |
---|
| 932 | template <typename TT> |
---|
| 933 | EdgeMap(const EdgeMap<TT>& copy) |
---|
| 934 | : forward_map(copy.forward_map), backward_map(copy.backward_map) {} |
---|
| 935 | |
---|
| 936 | template <typename TT> |
---|
| 937 | EdgeMap& operator=(const EdgeMap<TT>& copy) { |
---|
| 938 | forward_map = copy.forward_map; |
---|
| 939 | backward_map = copy.backward_map; |
---|
| 940 | return *this; |
---|
| 941 | } |
---|
| 942 | |
---|
[569] | 943 | void set(Edge e, T a) { |
---|
| 944 | if (!e.backward) |
---|
[792] | 945 | forward_map.set(e, a); |
---|
[569] | 946 | else |
---|
[792] | 947 | backward_map.set(e, a); |
---|
[569] | 948 | } |
---|
[891] | 949 | |
---|
| 950 | typename Graph::template EdgeMap<T>::ConstReferenceType |
---|
| 951 | operator[](Edge e) const { |
---|
[569] | 952 | if (!e.backward) |
---|
[792] | 953 | return forward_map[e]; |
---|
[569] | 954 | else |
---|
[792] | 955 | return backward_map[e]; |
---|
[569] | 956 | } |
---|
[891] | 957 | |
---|
| 958 | typename Graph::template EdgeMap<T>::ReferenceType |
---|
| 959 | operator[](Edge e) { |
---|
| 960 | if (!e.backward) |
---|
| 961 | return forward_map[e]; |
---|
| 962 | else |
---|
| 963 | return backward_map[e]; |
---|
| 964 | } |
---|
| 965 | |
---|
[625] | 966 | void update() { |
---|
| 967 | forward_map.update(); |
---|
| 968 | backward_map.update(); |
---|
| 969 | } |
---|
[569] | 970 | }; |
---|
[877] | 971 | |
---|
| 972 | |
---|
[891] | 973 | // KEEP_NODE_MAP(Parent, SubBidirGraphWrapper); |
---|
[877] | 974 | |
---|
[569] | 975 | }; |
---|
| 976 | |
---|
[650] | 977 | |
---|
| 978 | ///\brief A wrapper for composing bidirected graph from a directed one. |
---|
| 979 | /// |
---|
[879] | 980 | ///\warning Graph wrappers are in even more experimental state than the other |
---|
| 981 | ///parts of the lib. Use them at you own risk. |
---|
| 982 | /// |
---|
[650] | 983 | /// A wrapper for composing bidirected graph from a directed one. |
---|
| 984 | /// A bidirected graph is composed over the directed one without physical |
---|
| 985 | /// storage. As the oppositely directed edges are logically different ones |
---|
| 986 | /// the maps are able to attach different values for them. |
---|
| 987 | template<typename Graph> |
---|
| 988 | class BidirGraphWrapper : |
---|
| 989 | public SubBidirGraphWrapper< |
---|
| 990 | Graph, |
---|
| 991 | ConstMap<typename Graph::Edge, bool>, |
---|
| 992 | ConstMap<typename Graph::Edge, bool> > { |
---|
| 993 | public: |
---|
| 994 | typedef SubBidirGraphWrapper< |
---|
| 995 | Graph, |
---|
| 996 | ConstMap<typename Graph::Edge, bool>, |
---|
| 997 | ConstMap<typename Graph::Edge, bool> > Parent; |
---|
| 998 | protected: |
---|
| 999 | ConstMap<typename Graph::Edge, bool> cm; |
---|
| 1000 | |
---|
[655] | 1001 | BidirGraphWrapper() : Parent(), cm(true) { |
---|
| 1002 | Parent::setForwardFilterMap(cm); |
---|
| 1003 | Parent::setBackwardFilterMap(cm); |
---|
| 1004 | } |
---|
[650] | 1005 | public: |
---|
| 1006 | BidirGraphWrapper(Graph& _graph) : Parent() { |
---|
| 1007 | Parent::setGraph(_graph); |
---|
| 1008 | Parent::setForwardFilterMap(cm); |
---|
| 1009 | Parent::setBackwardFilterMap(cm); |
---|
| 1010 | } |
---|
[738] | 1011 | |
---|
| 1012 | int edgeNum() const { |
---|
| 1013 | return 2*this->graph->edgeNum(); |
---|
| 1014 | } |
---|
[891] | 1015 | // KEEP_MAPS(Parent, BidirGraphWrapper); |
---|
[650] | 1016 | }; |
---|
| 1017 | |
---|
| 1018 | |
---|
[612] | 1019 | /// \brief A bidirected graph template. |
---|
| 1020 | /// |
---|
[879] | 1021 | ///\warning Graph wrappers are in even more experimental state than the other |
---|
| 1022 | ///parts of the lib. Use them at you own risk. |
---|
| 1023 | /// |
---|
[612] | 1024 | /// A bidirected graph template. |
---|
| 1025 | /// Such a bidirected graph stores each pair of oppositely directed edges |
---|
| 1026 | /// ones in the memory, i.e. a directed graph of type |
---|
| 1027 | /// \c Graph is used for that. |
---|
| 1028 | /// As the oppositely directed edges are logically different ones |
---|
| 1029 | /// the maps are able to attach different values for them. |
---|
| 1030 | /// \ingroup graphs |
---|
| 1031 | template<typename Graph> |
---|
| 1032 | class BidirGraph : public BidirGraphWrapper<Graph> { |
---|
[650] | 1033 | public: |
---|
[612] | 1034 | typedef UndirGraphWrapper<Graph> Parent; |
---|
| 1035 | protected: |
---|
| 1036 | Graph gr; |
---|
| 1037 | public: |
---|
| 1038 | BidirGraph() : BidirGraphWrapper<Graph>() { |
---|
| 1039 | Parent::setGraph(gr); |
---|
| 1040 | } |
---|
[891] | 1041 | // KEEP_MAPS(Parent, BidirGraph); |
---|
[612] | 1042 | }; |
---|
[569] | 1043 | |
---|
[556] | 1044 | |
---|
[650] | 1045 | |
---|
| 1046 | template<typename Graph, typename Number, |
---|
| 1047 | typename CapacityMap, typename FlowMap> |
---|
[658] | 1048 | class ResForwardFilter { |
---|
| 1049 | // const Graph* graph; |
---|
[650] | 1050 | const CapacityMap* capacity; |
---|
| 1051 | const FlowMap* flow; |
---|
| 1052 | public: |
---|
[658] | 1053 | ResForwardFilter(/*const Graph& _graph, */ |
---|
| 1054 | const CapacityMap& _capacity, const FlowMap& _flow) : |
---|
| 1055 | /*graph(&_graph),*/ capacity(&_capacity), flow(&_flow) { } |
---|
| 1056 | ResForwardFilter() : /*graph(0),*/ capacity(0), flow(0) { } |
---|
[656] | 1057 | void setCapacity(const CapacityMap& _capacity) { capacity=&_capacity; } |
---|
| 1058 | void setFlow(const FlowMap& _flow) { flow=&_flow; } |
---|
[650] | 1059 | bool operator[](const typename Graph::Edge& e) const { |
---|
[738] | 1060 | return (Number((*flow)[e]) < Number((*capacity)[e])); |
---|
[650] | 1061 | } |
---|
| 1062 | }; |
---|
| 1063 | |
---|
| 1064 | template<typename Graph, typename Number, |
---|
| 1065 | typename CapacityMap, typename FlowMap> |
---|
[658] | 1066 | class ResBackwardFilter { |
---|
[650] | 1067 | const CapacityMap* capacity; |
---|
| 1068 | const FlowMap* flow; |
---|
| 1069 | public: |
---|
[658] | 1070 | ResBackwardFilter(/*const Graph& _graph,*/ |
---|
| 1071 | const CapacityMap& _capacity, const FlowMap& _flow) : |
---|
| 1072 | /*graph(&_graph),*/ capacity(&_capacity), flow(&_flow) { } |
---|
| 1073 | ResBackwardFilter() : /*graph(0),*/ capacity(0), flow(0) { } |
---|
[656] | 1074 | void setCapacity(const CapacityMap& _capacity) { capacity=&_capacity; } |
---|
| 1075 | void setFlow(const FlowMap& _flow) { flow=&_flow; } |
---|
[650] | 1076 | bool operator[](const typename Graph::Edge& e) const { |
---|
[738] | 1077 | return (Number(0) < Number((*flow)[e])); |
---|
[650] | 1078 | } |
---|
| 1079 | }; |
---|
| 1080 | |
---|
[653] | 1081 | |
---|
| 1082 | /// A wrapper for composing the residual graph for directed flow and circulation problems. |
---|
[650] | 1083 | |
---|
[879] | 1084 | ///\warning Graph wrappers are in even more experimental state than the other |
---|
| 1085 | ///parts of the lib. Use them at you own risk. |
---|
| 1086 | /// |
---|
[653] | 1087 | /// A wrapper for composing the residual graph for directed flow and circulation problems. |
---|
[650] | 1088 | template<typename Graph, typename Number, |
---|
| 1089 | typename CapacityMap, typename FlowMap> |
---|
[653] | 1090 | class ResGraphWrapper : |
---|
[650] | 1091 | public SubBidirGraphWrapper< |
---|
| 1092 | Graph, |
---|
[658] | 1093 | ResForwardFilter<Graph, Number, CapacityMap, FlowMap>, |
---|
| 1094 | ResBackwardFilter<Graph, Number, CapacityMap, FlowMap> > { |
---|
[650] | 1095 | public: |
---|
| 1096 | typedef SubBidirGraphWrapper< |
---|
| 1097 | Graph, |
---|
[658] | 1098 | ResForwardFilter<Graph, Number, CapacityMap, FlowMap>, |
---|
| 1099 | ResBackwardFilter<Graph, Number, CapacityMap, FlowMap> > Parent; |
---|
[650] | 1100 | protected: |
---|
| 1101 | const CapacityMap* capacity; |
---|
| 1102 | FlowMap* flow; |
---|
[658] | 1103 | ResForwardFilter<Graph, Number, CapacityMap, FlowMap> forward_filter; |
---|
| 1104 | ResBackwardFilter<Graph, Number, CapacityMap, FlowMap> backward_filter; |
---|
| 1105 | ResGraphWrapper() : Parent(), |
---|
| 1106 | capacity(0), flow(0) { } |
---|
| 1107 | void setCapacityMap(const CapacityMap& _capacity) { |
---|
| 1108 | capacity=&_capacity; |
---|
| 1109 | forward_filter.setCapacity(_capacity); |
---|
| 1110 | backward_filter.setCapacity(_capacity); |
---|
| 1111 | } |
---|
| 1112 | void setFlowMap(FlowMap& _flow) { |
---|
| 1113 | flow=&_flow; |
---|
| 1114 | forward_filter.setFlow(_flow); |
---|
| 1115 | backward_filter.setFlow(_flow); |
---|
| 1116 | } |
---|
[650] | 1117 | public: |
---|
[653] | 1118 | ResGraphWrapper(Graph& _graph, const CapacityMap& _capacity, |
---|
[650] | 1119 | FlowMap& _flow) : |
---|
| 1120 | Parent(), capacity(&_capacity), flow(&_flow), |
---|
[658] | 1121 | forward_filter(/*_graph,*/ _capacity, _flow), |
---|
| 1122 | backward_filter(/*_graph,*/ _capacity, _flow) { |
---|
[650] | 1123 | Parent::setGraph(_graph); |
---|
| 1124 | Parent::setForwardFilterMap(forward_filter); |
---|
| 1125 | Parent::setBackwardFilterMap(backward_filter); |
---|
| 1126 | } |
---|
| 1127 | |
---|
[660] | 1128 | typedef typename Parent::Edge Edge; |
---|
| 1129 | |
---|
| 1130 | void augment(const Edge& e, Number a) const { |
---|
[650] | 1131 | if (Parent::forward(e)) |
---|
| 1132 | flow->set(e, (*flow)[e]+a); |
---|
| 1133 | else |
---|
| 1134 | flow->set(e, (*flow)[e]-a); |
---|
| 1135 | } |
---|
| 1136 | |
---|
[660] | 1137 | /// \brief Residual capacity map. |
---|
| 1138 | /// |
---|
[910] | 1139 | /// In generic residual graphs the residual capacity can be obtained |
---|
| 1140 | /// as a map. |
---|
[660] | 1141 | class ResCap { |
---|
| 1142 | protected: |
---|
| 1143 | const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>* res_graph; |
---|
| 1144 | public: |
---|
| 1145 | typedef Number ValueType; |
---|
| 1146 | typedef Edge KeyType; |
---|
[888] | 1147 | ResCap(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& |
---|
| 1148 | _res_graph) : res_graph(&_res_graph) { } |
---|
[660] | 1149 | Number operator[](const Edge& e) const { |
---|
| 1150 | if (res_graph->forward(e)) |
---|
| 1151 | return (*(res_graph->capacity))[e]-(*(res_graph->flow))[e]; |
---|
| 1152 | else |
---|
| 1153 | return (*(res_graph->flow))[e]; |
---|
| 1154 | } |
---|
| 1155 | }; |
---|
| 1156 | |
---|
[891] | 1157 | // KEEP_MAPS(Parent, ResGraphWrapper); |
---|
[650] | 1158 | }; |
---|
| 1159 | |
---|
| 1160 | |
---|
[612] | 1161 | /// For blocking flows. |
---|
[556] | 1162 | |
---|
[879] | 1163 | ///\warning Graph wrappers are in even more experimental state than the other |
---|
| 1164 | ///parts of the lib. Use them at you own risk. |
---|
| 1165 | /// |
---|
[792] | 1166 | /// This graph wrapper is used for on-the-fly |
---|
| 1167 | /// Dinits blocking flow computations. |
---|
[612] | 1168 | /// For each node, an out-edge is stored which is used when the |
---|
| 1169 | /// \code |
---|
| 1170 | /// OutEdgeIt& first(OutEdgeIt&, const Node&) |
---|
| 1171 | /// \endcode |
---|
| 1172 | /// is called. |
---|
[556] | 1173 | /// |
---|
[792] | 1174 | /// \author Marton Makai |
---|
[556] | 1175 | template<typename Graph, typename FirstOutEdgesMap> |
---|
| 1176 | class ErasingFirstGraphWrapper : public GraphWrapper<Graph> { |
---|
[650] | 1177 | public: |
---|
| 1178 | typedef GraphWrapper<Graph> Parent; |
---|
[556] | 1179 | protected: |
---|
| 1180 | FirstOutEdgesMap* first_out_edges; |
---|
| 1181 | public: |
---|
| 1182 | ErasingFirstGraphWrapper(Graph& _graph, |
---|
| 1183 | FirstOutEdgesMap& _first_out_edges) : |
---|
| 1184 | GraphWrapper<Graph>(_graph), first_out_edges(&_first_out_edges) { } |
---|
| 1185 | |
---|
| 1186 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
| 1187 | typedef typename GraphWrapper<Graph>::Edge Edge; |
---|
[777] | 1188 | class OutEdgeIt : public Edge { |
---|
[556] | 1189 | friend class GraphWrapper<Graph>; |
---|
| 1190 | friend class ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>; |
---|
[777] | 1191 | const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>* gw; |
---|
[556] | 1192 | public: |
---|
| 1193 | OutEdgeIt() { } |
---|
[777] | 1194 | OutEdgeIt(Invalid i) : Edge(i) { } |
---|
| 1195 | OutEdgeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _gw, |
---|
| 1196 | const Node& n) : |
---|
| 1197 | Edge((*(_gw.first_out_edges))[n]), gw(&_gw) { } |
---|
| 1198 | OutEdgeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _gw, |
---|
| 1199 | const Edge& e) : |
---|
| 1200 | Edge(e), gw(&_gw) { } |
---|
| 1201 | OutEdgeIt& operator++() { |
---|
| 1202 | *(static_cast<Edge*>(this))= |
---|
| 1203 | ++(typename Graph::OutEdgeIt(*(gw->graph), *this)); |
---|
| 1204 | return *this; |
---|
| 1205 | } |
---|
[556] | 1206 | }; |
---|
| 1207 | |
---|
| 1208 | using GraphWrapper<Graph>::first; |
---|
| 1209 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
| 1210 | i=OutEdgeIt(*this, p); return i; |
---|
| 1211 | } |
---|
[777] | 1212 | void erase(const Edge& e) const { |
---|
| 1213 | Node n=tail(e); |
---|
[844] | 1214 | typename Graph::OutEdgeIt f(*Parent::graph, n); |
---|
[777] | 1215 | ++f; |
---|
| 1216 | first_out_edges->set(n, f); |
---|
[556] | 1217 | } |
---|
[877] | 1218 | |
---|
[891] | 1219 | // KEEP_MAPS(Parent, ErasingFirstGraphWrapper); |
---|
[556] | 1220 | }; |
---|
| 1221 | |
---|
| 1222 | ///@} |
---|
| 1223 | |
---|
| 1224 | } //namespace hugo |
---|
| 1225 | |
---|
| 1226 | #endif //HUGO_GRAPH_WRAPPER_H |
---|
| 1227 | |
---|