[468] | 1 | /* -*- C++ -*- |
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| 2 | * |
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| 3 | * This file is a part of LEMON, a generic C++ optimization library |
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| 4 | * |
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| 5 | * Copyright (C) 2003-2008 |
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| 6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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| 7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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| 8 | * |
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| 9 | * Permission to use, modify and distribute this software is granted |
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| 10 | * provided that this copyright notice appears in all copies. For |
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| 11 | * precise terms see the accompanying LICENSE file. |
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| 12 | * |
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| 13 | * This software is provided "AS IS" with no warranty of any kind, |
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| 14 | * express or implied, and with no claim as to its suitability for any |
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| 15 | * purpose. |
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| 16 | * |
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| 17 | */ |
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| 18 | |
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| 19 | #ifndef LEMON_BITS_EDGE_SET_EXTENDER_H |
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| 20 | #define LEMON_BITS_EDGE_SET_EXTENDER_H |
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| 21 | |
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[519] | 22 | #include <lemon/core.h> |
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[468] | 23 | #include <lemon/error.h> |
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| 24 | #include <lemon/bits/default_map.h> |
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[519] | 25 | #include <lemon/bits/map_extender.h> |
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[468] | 26 | |
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[559] | 27 | //\ingroup digraphbits |
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| 28 | //\file |
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| 29 | //\brief Extenders for the arc set types |
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[468] | 30 | namespace lemon { |
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| 31 | |
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[559] | 32 | // \ingroup digraphbits |
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| 33 | // |
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| 34 | // \brief Extender for the ArcSets |
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[468] | 35 | template <typename Base> |
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| 36 | class ArcSetExtender : public Base { |
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[617] | 37 | typedef Base Parent; |
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| 38 | |
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[468] | 39 | public: |
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| 40 | |
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| 41 | typedef ArcSetExtender Digraph; |
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| 42 | |
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| 43 | // Base extensions |
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| 44 | |
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| 45 | typedef typename Parent::Node Node; |
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| 46 | typedef typename Parent::Arc Arc; |
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| 47 | |
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| 48 | int maxId(Node) const { |
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| 49 | return Parent::maxNodeId(); |
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| 50 | } |
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| 51 | |
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| 52 | int maxId(Arc) const { |
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| 53 | return Parent::maxArcId(); |
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| 54 | } |
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| 55 | |
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| 56 | Node fromId(int id, Node) const { |
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| 57 | return Parent::nodeFromId(id); |
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| 58 | } |
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| 59 | |
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| 60 | Arc fromId(int id, Arc) const { |
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| 61 | return Parent::arcFromId(id); |
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| 62 | } |
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| 63 | |
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| 64 | Node oppositeNode(const Node &n, const Arc &e) const { |
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| 65 | if (n == Parent::source(e)) |
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| 66 | return Parent::target(e); |
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| 67 | else if(n==Parent::target(e)) |
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| 68 | return Parent::source(e); |
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| 69 | else |
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| 70 | return INVALID; |
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| 71 | } |
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| 72 | |
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| 73 | |
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| 74 | // Alteration notifier extensions |
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| 75 | |
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[559] | 76 | // The arc observer registry. |
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[468] | 77 | typedef AlterationNotifier<ArcSetExtender, Arc> ArcNotifier; |
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| 78 | |
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| 79 | protected: |
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| 80 | |
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| 81 | mutable ArcNotifier arc_notifier; |
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| 82 | |
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| 83 | public: |
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| 84 | |
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| 85 | using Parent::notifier; |
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| 86 | |
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[559] | 87 | // Gives back the arc alteration notifier. |
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[468] | 88 | ArcNotifier& notifier(Arc) const { |
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| 89 | return arc_notifier; |
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| 90 | } |
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| 91 | |
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| 92 | // Iterable extensions |
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| 93 | |
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| 94 | class NodeIt : public Node { |
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| 95 | const Digraph* digraph; |
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| 96 | public: |
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| 97 | |
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| 98 | NodeIt() {} |
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| 99 | |
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| 100 | NodeIt(Invalid i) : Node(i) { } |
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| 101 | |
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| 102 | explicit NodeIt(const Digraph& _graph) : digraph(&_graph) { |
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| 103 | _graph.first(static_cast<Node&>(*this)); |
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| 104 | } |
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| 105 | |
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| 106 | NodeIt(const Digraph& _graph, const Node& node) |
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| 107 | : Node(node), digraph(&_graph) {} |
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| 108 | |
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| 109 | NodeIt& operator++() { |
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| 110 | digraph->next(*this); |
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| 111 | return *this; |
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| 112 | } |
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| 113 | |
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| 114 | }; |
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| 115 | |
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| 116 | |
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| 117 | class ArcIt : public Arc { |
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| 118 | const Digraph* digraph; |
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| 119 | public: |
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| 120 | |
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| 121 | ArcIt() { } |
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| 122 | |
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| 123 | ArcIt(Invalid i) : Arc(i) { } |
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| 124 | |
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| 125 | explicit ArcIt(const Digraph& _graph) : digraph(&_graph) { |
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| 126 | _graph.first(static_cast<Arc&>(*this)); |
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| 127 | } |
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| 128 | |
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| 129 | ArcIt(const Digraph& _graph, const Arc& e) : |
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| 130 | Arc(e), digraph(&_graph) { } |
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| 131 | |
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| 132 | ArcIt& operator++() { |
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| 133 | digraph->next(*this); |
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| 134 | return *this; |
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| 135 | } |
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| 136 | |
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| 137 | }; |
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| 138 | |
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| 139 | |
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| 140 | class OutArcIt : public Arc { |
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| 141 | const Digraph* digraph; |
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| 142 | public: |
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| 143 | |
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| 144 | OutArcIt() { } |
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| 145 | |
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| 146 | OutArcIt(Invalid i) : Arc(i) { } |
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| 147 | |
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| 148 | OutArcIt(const Digraph& _graph, const Node& node) |
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| 149 | : digraph(&_graph) { |
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| 150 | _graph.firstOut(*this, node); |
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| 151 | } |
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| 152 | |
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| 153 | OutArcIt(const Digraph& _graph, const Arc& arc) |
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| 154 | : Arc(arc), digraph(&_graph) {} |
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| 155 | |
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| 156 | OutArcIt& operator++() { |
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| 157 | digraph->nextOut(*this); |
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| 158 | return *this; |
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| 159 | } |
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| 160 | |
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| 161 | }; |
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| 162 | |
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| 163 | |
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| 164 | class InArcIt : public Arc { |
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| 165 | const Digraph* digraph; |
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| 166 | public: |
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| 167 | |
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| 168 | InArcIt() { } |
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| 169 | |
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| 170 | InArcIt(Invalid i) : Arc(i) { } |
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| 171 | |
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| 172 | InArcIt(const Digraph& _graph, const Node& node) |
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| 173 | : digraph(&_graph) { |
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| 174 | _graph.firstIn(*this, node); |
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| 175 | } |
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| 176 | |
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| 177 | InArcIt(const Digraph& _graph, const Arc& arc) : |
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| 178 | Arc(arc), digraph(&_graph) {} |
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| 179 | |
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| 180 | InArcIt& operator++() { |
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| 181 | digraph->nextIn(*this); |
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| 182 | return *this; |
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| 183 | } |
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| 184 | |
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| 185 | }; |
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| 186 | |
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[559] | 187 | // \brief Base node of the iterator |
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| 188 | // |
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| 189 | // Returns the base node (ie. the source in this case) of the iterator |
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[468] | 190 | Node baseNode(const OutArcIt &e) const { |
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| 191 | return Parent::source(static_cast<const Arc&>(e)); |
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| 192 | } |
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[559] | 193 | // \brief Running node of the iterator |
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| 194 | // |
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| 195 | // Returns the running node (ie. the target in this case) of the |
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| 196 | // iterator |
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[468] | 197 | Node runningNode(const OutArcIt &e) const { |
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| 198 | return Parent::target(static_cast<const Arc&>(e)); |
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| 199 | } |
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| 200 | |
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[559] | 201 | // \brief Base node of the iterator |
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| 202 | // |
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| 203 | // Returns the base node (ie. the target in this case) of the iterator |
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[468] | 204 | Node baseNode(const InArcIt &e) const { |
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| 205 | return Parent::target(static_cast<const Arc&>(e)); |
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| 206 | } |
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[559] | 207 | // \brief Running node of the iterator |
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| 208 | // |
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| 209 | // Returns the running node (ie. the source in this case) of the |
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| 210 | // iterator |
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[468] | 211 | Node runningNode(const InArcIt &e) const { |
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| 212 | return Parent::source(static_cast<const Arc&>(e)); |
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| 213 | } |
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| 214 | |
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| 215 | using Parent::first; |
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| 216 | |
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| 217 | // Mappable extension |
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| 218 | |
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| 219 | template <typename _Value> |
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| 220 | class ArcMap |
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| 221 | : public MapExtender<DefaultMap<Digraph, Arc, _Value> > { |
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| 222 | typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent; |
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| 223 | |
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[617] | 224 | public: |
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[468] | 225 | explicit ArcMap(const Digraph& _g) |
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| 226 | : Parent(_g) {} |
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| 227 | ArcMap(const Digraph& _g, const _Value& _v) |
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| 228 | : Parent(_g, _v) {} |
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| 229 | |
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| 230 | ArcMap& operator=(const ArcMap& cmap) { |
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| 231 | return operator=<ArcMap>(cmap); |
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| 232 | } |
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| 233 | |
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| 234 | template <typename CMap> |
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| 235 | ArcMap& operator=(const CMap& cmap) { |
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| 236 | Parent::operator=(cmap); |
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| 237 | return *this; |
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| 238 | } |
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| 239 | |
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| 240 | }; |
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| 241 | |
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| 242 | |
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| 243 | // Alteration extension |
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| 244 | |
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| 245 | Arc addArc(const Node& from, const Node& to) { |
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| 246 | Arc arc = Parent::addArc(from, to); |
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| 247 | notifier(Arc()).add(arc); |
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| 248 | return arc; |
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| 249 | } |
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| 250 | |
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| 251 | void clear() { |
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| 252 | notifier(Arc()).clear(); |
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| 253 | Parent::clear(); |
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| 254 | } |
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| 255 | |
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| 256 | void erase(const Arc& arc) { |
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| 257 | notifier(Arc()).erase(arc); |
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| 258 | Parent::erase(arc); |
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| 259 | } |
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| 260 | |
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| 261 | ArcSetExtender() { |
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| 262 | arc_notifier.setContainer(*this); |
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| 263 | } |
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| 264 | |
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| 265 | ~ArcSetExtender() { |
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| 266 | arc_notifier.clear(); |
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| 267 | } |
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| 268 | |
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| 269 | }; |
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| 270 | |
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| 271 | |
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[559] | 272 | // \ingroup digraphbits |
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| 273 | // |
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| 274 | // \brief Extender for the EdgeSets |
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[468] | 275 | template <typename Base> |
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| 276 | class EdgeSetExtender : public Base { |
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[617] | 277 | typedef Base Parent; |
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[468] | 278 | |
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| 279 | public: |
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| 280 | |
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[617] | 281 | typedef EdgeSetExtender Graph; |
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[468] | 282 | |
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[882] | 283 | typedef True UndirectedTag; |
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| 284 | |
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[468] | 285 | typedef typename Parent::Node Node; |
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| 286 | typedef typename Parent::Arc Arc; |
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| 287 | typedef typename Parent::Edge Edge; |
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| 288 | |
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| 289 | int maxId(Node) const { |
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| 290 | return Parent::maxNodeId(); |
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| 291 | } |
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| 292 | |
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| 293 | int maxId(Arc) const { |
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| 294 | return Parent::maxArcId(); |
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| 295 | } |
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| 296 | |
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| 297 | int maxId(Edge) const { |
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| 298 | return Parent::maxEdgeId(); |
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| 299 | } |
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| 300 | |
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| 301 | Node fromId(int id, Node) const { |
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| 302 | return Parent::nodeFromId(id); |
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| 303 | } |
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| 304 | |
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| 305 | Arc fromId(int id, Arc) const { |
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| 306 | return Parent::arcFromId(id); |
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| 307 | } |
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| 308 | |
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| 309 | Edge fromId(int id, Edge) const { |
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| 310 | return Parent::edgeFromId(id); |
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| 311 | } |
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| 312 | |
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| 313 | Node oppositeNode(const Node &n, const Edge &e) const { |
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| 314 | if( n == Parent::u(e)) |
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| 315 | return Parent::v(e); |
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| 316 | else if( n == Parent::v(e)) |
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| 317 | return Parent::u(e); |
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| 318 | else |
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| 319 | return INVALID; |
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| 320 | } |
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| 321 | |
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| 322 | Arc oppositeArc(const Arc &e) const { |
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| 323 | return Parent::direct(e, !Parent::direction(e)); |
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| 324 | } |
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| 325 | |
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| 326 | using Parent::direct; |
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| 327 | Arc direct(const Edge &e, const Node &s) const { |
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| 328 | return Parent::direct(e, Parent::u(e) == s); |
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| 329 | } |
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| 330 | |
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| 331 | typedef AlterationNotifier<EdgeSetExtender, Arc> ArcNotifier; |
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| 332 | typedef AlterationNotifier<EdgeSetExtender, Edge> EdgeNotifier; |
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| 333 | |
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| 334 | |
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| 335 | protected: |
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| 336 | |
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| 337 | mutable ArcNotifier arc_notifier; |
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| 338 | mutable EdgeNotifier edge_notifier; |
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| 339 | |
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| 340 | public: |
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| 341 | |
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| 342 | using Parent::notifier; |
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| 343 | |
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| 344 | ArcNotifier& notifier(Arc) const { |
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| 345 | return arc_notifier; |
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| 346 | } |
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| 347 | |
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| 348 | EdgeNotifier& notifier(Edge) const { |
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| 349 | return edge_notifier; |
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| 350 | } |
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| 351 | |
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| 352 | |
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| 353 | class NodeIt : public Node { |
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[617] | 354 | const Graph* graph; |
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[468] | 355 | public: |
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| 356 | |
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| 357 | NodeIt() {} |
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| 358 | |
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| 359 | NodeIt(Invalid i) : Node(i) { } |
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| 360 | |
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[617] | 361 | explicit NodeIt(const Graph& _graph) : graph(&_graph) { |
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[468] | 362 | _graph.first(static_cast<Node&>(*this)); |
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| 363 | } |
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| 364 | |
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[617] | 365 | NodeIt(const Graph& _graph, const Node& node) |
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| 366 | : Node(node), graph(&_graph) {} |
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[468] | 367 | |
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| 368 | NodeIt& operator++() { |
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[617] | 369 | graph->next(*this); |
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[468] | 370 | return *this; |
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| 371 | } |
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| 372 | |
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| 373 | }; |
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| 374 | |
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| 375 | |
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| 376 | class ArcIt : public Arc { |
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[617] | 377 | const Graph* graph; |
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[468] | 378 | public: |
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| 379 | |
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| 380 | ArcIt() { } |
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| 381 | |
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| 382 | ArcIt(Invalid i) : Arc(i) { } |
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| 383 | |
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[617] | 384 | explicit ArcIt(const Graph& _graph) : graph(&_graph) { |
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[468] | 385 | _graph.first(static_cast<Arc&>(*this)); |
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| 386 | } |
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| 387 | |
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[617] | 388 | ArcIt(const Graph& _graph, const Arc& e) : |
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| 389 | Arc(e), graph(&_graph) { } |
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[468] | 390 | |
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| 391 | ArcIt& operator++() { |
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[617] | 392 | graph->next(*this); |
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[468] | 393 | return *this; |
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| 394 | } |
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| 395 | |
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| 396 | }; |
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| 397 | |
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| 398 | |
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| 399 | class OutArcIt : public Arc { |
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[617] | 400 | const Graph* graph; |
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[468] | 401 | public: |
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| 402 | |
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| 403 | OutArcIt() { } |
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| 404 | |
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| 405 | OutArcIt(Invalid i) : Arc(i) { } |
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| 406 | |
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[617] | 407 | OutArcIt(const Graph& _graph, const Node& node) |
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| 408 | : graph(&_graph) { |
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[468] | 409 | _graph.firstOut(*this, node); |
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| 410 | } |
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| 411 | |
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[617] | 412 | OutArcIt(const Graph& _graph, const Arc& arc) |
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| 413 | : Arc(arc), graph(&_graph) {} |
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[468] | 414 | |
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| 415 | OutArcIt& operator++() { |
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[617] | 416 | graph->nextOut(*this); |
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[468] | 417 | return *this; |
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| 418 | } |
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| 419 | |
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| 420 | }; |
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| 421 | |
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| 422 | |
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| 423 | class InArcIt : public Arc { |
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[617] | 424 | const Graph* graph; |
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[468] | 425 | public: |
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| 426 | |
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| 427 | InArcIt() { } |
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| 428 | |
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| 429 | InArcIt(Invalid i) : Arc(i) { } |
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| 430 | |
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[617] | 431 | InArcIt(const Graph& _graph, const Node& node) |
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| 432 | : graph(&_graph) { |
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[468] | 433 | _graph.firstIn(*this, node); |
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| 434 | } |
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| 435 | |
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[617] | 436 | InArcIt(const Graph& _graph, const Arc& arc) : |
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| 437 | Arc(arc), graph(&_graph) {} |
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[468] | 438 | |
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| 439 | InArcIt& operator++() { |
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[617] | 440 | graph->nextIn(*this); |
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[468] | 441 | return *this; |
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| 442 | } |
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| 443 | |
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| 444 | }; |
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| 445 | |
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| 446 | |
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| 447 | class EdgeIt : public Parent::Edge { |
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[617] | 448 | const Graph* graph; |
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[468] | 449 | public: |
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| 450 | |
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| 451 | EdgeIt() { } |
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| 452 | |
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| 453 | EdgeIt(Invalid i) : Edge(i) { } |
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| 454 | |
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[617] | 455 | explicit EdgeIt(const Graph& _graph) : graph(&_graph) { |
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[468] | 456 | _graph.first(static_cast<Edge&>(*this)); |
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| 457 | } |
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| 458 | |
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[617] | 459 | EdgeIt(const Graph& _graph, const Edge& e) : |
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| 460 | Edge(e), graph(&_graph) { } |
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[468] | 461 | |
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| 462 | EdgeIt& operator++() { |
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[617] | 463 | graph->next(*this); |
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[468] | 464 | return *this; |
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| 465 | } |
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| 466 | |
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| 467 | }; |
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| 468 | |
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| 469 | class IncEdgeIt : public Parent::Edge { |
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| 470 | friend class EdgeSetExtender; |
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[617] | 471 | const Graph* graph; |
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[468] | 472 | bool direction; |
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| 473 | public: |
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| 474 | |
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| 475 | IncEdgeIt() { } |
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| 476 | |
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| 477 | IncEdgeIt(Invalid i) : Edge(i), direction(false) { } |
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| 478 | |
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[617] | 479 | IncEdgeIt(const Graph& _graph, const Node &n) : graph(&_graph) { |
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[468] | 480 | _graph.firstInc(*this, direction, n); |
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| 481 | } |
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| 482 | |
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[617] | 483 | IncEdgeIt(const Graph& _graph, const Edge &ue, const Node &n) |
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| 484 | : graph(&_graph), Edge(ue) { |
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[468] | 485 | direction = (_graph.source(ue) == n); |
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| 486 | } |
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| 487 | |
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| 488 | IncEdgeIt& operator++() { |
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[617] | 489 | graph->nextInc(*this, direction); |
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[468] | 490 | return *this; |
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| 491 | } |
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| 492 | }; |
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| 493 | |
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[559] | 494 | // \brief Base node of the iterator |
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| 495 | // |
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| 496 | // Returns the base node (ie. the source in this case) of the iterator |
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[468] | 497 | Node baseNode(const OutArcIt &e) const { |
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| 498 | return Parent::source(static_cast<const Arc&>(e)); |
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| 499 | } |
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[559] | 500 | // \brief Running node of the iterator |
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| 501 | // |
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| 502 | // Returns the running node (ie. the target in this case) of the |
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| 503 | // iterator |
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[468] | 504 | Node runningNode(const OutArcIt &e) const { |
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| 505 | return Parent::target(static_cast<const Arc&>(e)); |
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| 506 | } |
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| 507 | |
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[559] | 508 | // \brief Base node of the iterator |
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| 509 | // |
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| 510 | // Returns the base node (ie. the target in this case) of the iterator |
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[468] | 511 | Node baseNode(const InArcIt &e) const { |
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| 512 | return Parent::target(static_cast<const Arc&>(e)); |
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| 513 | } |
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[559] | 514 | // \brief Running node of the iterator |
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| 515 | // |
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| 516 | // Returns the running node (ie. the source in this case) of the |
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| 517 | // iterator |
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[468] | 518 | Node runningNode(const InArcIt &e) const { |
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| 519 | return Parent::source(static_cast<const Arc&>(e)); |
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| 520 | } |
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| 521 | |
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[559] | 522 | // Base node of the iterator |
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| 523 | // |
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| 524 | // Returns the base node of the iterator |
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[468] | 525 | Node baseNode(const IncEdgeIt &e) const { |
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[997] | 526 | return e.direction ? this->u(e) : this->v(e); |
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[468] | 527 | } |
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[559] | 528 | // Running node of the iterator |
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| 529 | // |
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| 530 | // Returns the running node of the iterator |
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[468] | 531 | Node runningNode(const IncEdgeIt &e) const { |
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[997] | 532 | return e.direction ? this->v(e) : this->u(e); |
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[468] | 533 | } |
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| 534 | |
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| 535 | |
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| 536 | template <typename _Value> |
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| 537 | class ArcMap |
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[617] | 538 | : public MapExtender<DefaultMap<Graph, Arc, _Value> > { |
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| 539 | typedef MapExtender<DefaultMap<Graph, Arc, _Value> > Parent; |
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| 540 | |
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[468] | 541 | public: |
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[685] | 542 | explicit ArcMap(const Graph& _g) |
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[468] | 543 | : Parent(_g) {} |
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[617] | 544 | ArcMap(const Graph& _g, const _Value& _v) |
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[468] | 545 | : Parent(_g, _v) {} |
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| 546 | |
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| 547 | ArcMap& operator=(const ArcMap& cmap) { |
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| 548 | return operator=<ArcMap>(cmap); |
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| 549 | } |
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| 550 | |
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| 551 | template <typename CMap> |
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| 552 | ArcMap& operator=(const CMap& cmap) { |
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| 553 | Parent::operator=(cmap); |
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| 554 | return *this; |
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| 555 | } |
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| 556 | |
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| 557 | }; |
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| 558 | |
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| 559 | |
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| 560 | template <typename _Value> |
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| 561 | class EdgeMap |
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[617] | 562 | : public MapExtender<DefaultMap<Graph, Edge, _Value> > { |
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| 563 | typedef MapExtender<DefaultMap<Graph, Edge, _Value> > Parent; |
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| 564 | |
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[468] | 565 | public: |
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[685] | 566 | explicit EdgeMap(const Graph& _g) |
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[468] | 567 | : Parent(_g) {} |
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| 568 | |
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[617] | 569 | EdgeMap(const Graph& _g, const _Value& _v) |
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[468] | 570 | : Parent(_g, _v) {} |
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| 571 | |
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| 572 | EdgeMap& operator=(const EdgeMap& cmap) { |
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| 573 | return operator=<EdgeMap>(cmap); |
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| 574 | } |
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| 575 | |
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| 576 | template <typename CMap> |
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| 577 | EdgeMap& operator=(const CMap& cmap) { |
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| 578 | Parent::operator=(cmap); |
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| 579 | return *this; |
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| 580 | } |
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| 581 | |
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| 582 | }; |
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| 583 | |
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| 584 | |
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| 585 | // Alteration extension |
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| 586 | |
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| 587 | Edge addEdge(const Node& from, const Node& to) { |
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| 588 | Edge edge = Parent::addEdge(from, to); |
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| 589 | notifier(Edge()).add(edge); |
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| 590 | std::vector<Arc> arcs; |
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| 591 | arcs.push_back(Parent::direct(edge, true)); |
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| 592 | arcs.push_back(Parent::direct(edge, false)); |
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| 593 | notifier(Arc()).add(arcs); |
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| 594 | return edge; |
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| 595 | } |
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| 596 | |
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| 597 | void clear() { |
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| 598 | notifier(Arc()).clear(); |
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| 599 | notifier(Edge()).clear(); |
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| 600 | Parent::clear(); |
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| 601 | } |
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| 602 | |
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| 603 | void erase(const Edge& edge) { |
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| 604 | std::vector<Arc> arcs; |
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| 605 | arcs.push_back(Parent::direct(edge, true)); |
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| 606 | arcs.push_back(Parent::direct(edge, false)); |
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| 607 | notifier(Arc()).erase(arcs); |
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| 608 | notifier(Edge()).erase(edge); |
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| 609 | Parent::erase(edge); |
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| 610 | } |
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| 611 | |
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| 612 | |
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| 613 | EdgeSetExtender() { |
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| 614 | arc_notifier.setContainer(*this); |
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| 615 | edge_notifier.setContainer(*this); |
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| 616 | } |
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| 617 | |
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| 618 | ~EdgeSetExtender() { |
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| 619 | edge_notifier.clear(); |
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| 620 | arc_notifier.clear(); |
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| 621 | } |
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| 622 | |
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| 623 | }; |
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| 624 | |
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| 625 | } |
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| 626 | |
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| 627 | #endif |
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