[906] | 1 | /* -*- C++ -*- |
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| 2 | * |
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[1956] | 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) 2003-2006 |
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| 6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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[1359] | 7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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[906] | 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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[105] | 18 | |
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[921] | 19 | #ifndef LEMON_SMART_GRAPH_H |
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| 20 | #define LEMON_SMART_GRAPH_H |
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[104] | 21 | |
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[491] | 22 | ///\ingroup graphs |
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[242] | 23 | ///\file |
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[1909] | 24 | ///\brief SmartGraph and SmartUGraph classes. |
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[242] | 25 | |
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[104] | 26 | #include <vector> |
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| 27 | |
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[1993] | 28 | #include <lemon/bits/invalid.h> |
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[157] | 29 | |
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[1999] | 30 | #include <lemon/bits/base_extender.h> |
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[1791] | 31 | #include <lemon/bits/graph_extender.h> |
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[1034] | 32 | |
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[1993] | 33 | #include <lemon/bits/utility.h> |
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[1820] | 34 | #include <lemon/error.h> |
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[782] | 35 | |
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[1979] | 36 | #include <lemon/bits/graph_extender.h> |
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| 37 | |
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[921] | 38 | namespace lemon { |
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[104] | 39 | |
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[973] | 40 | class SmartGraph; |
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[969] | 41 | ///Base of SmartGraph |
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| 42 | |
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| 43 | ///Base of SmartGraph |
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| 44 | /// |
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[946] | 45 | class SmartGraphBase { |
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[104] | 46 | |
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[973] | 47 | friend class SmatGraph; |
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| 48 | |
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| 49 | protected: |
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[104] | 50 | struct NodeT |
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| 51 | { |
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| 52 | int first_in,first_out; |
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[157] | 53 | NodeT() : first_in(-1), first_out(-1) {} |
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[104] | 54 | }; |
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| 55 | struct EdgeT |
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| 56 | { |
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[986] | 57 | int target, source, next_in, next_out; |
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[104] | 58 | //FIXME: is this necessary? |
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[157] | 59 | EdgeT() : next_in(-1), next_out(-1) {} |
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[104] | 60 | }; |
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| 61 | |
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| 62 | std::vector<NodeT> nodes; |
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[129] | 63 | |
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[104] | 64 | std::vector<EdgeT> edges; |
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| 65 | |
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[185] | 66 | |
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[104] | 67 | public: |
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[782] | 68 | |
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[946] | 69 | typedef SmartGraphBase Graph; |
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[104] | 70 | |
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[164] | 71 | class Node; |
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| 72 | class Edge; |
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[108] | 73 | |
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[104] | 74 | |
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| 75 | public: |
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| 76 | |
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[946] | 77 | SmartGraphBase() : nodes(), edges() { } |
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[1718] | 78 | SmartGraphBase(const SmartGraphBase &_g) |
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| 79 | : nodes(_g.nodes), edges(_g.edges) { } |
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[104] | 80 | |
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[977] | 81 | typedef True NodeNumTag; |
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| 82 | typedef True EdgeNumTag; |
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| 83 | |
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[813] | 84 | ///Number of nodes. |
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| 85 | int nodeNum() const { return nodes.size(); } |
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| 86 | ///Number of edges. |
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| 87 | int edgeNum() const { return edges.size(); } |
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[104] | 88 | |
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[813] | 89 | /// Maximum node ID. |
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| 90 | |
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| 91 | /// Maximum node ID. |
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| 92 | ///\sa id(Node) |
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[1791] | 93 | int maxNodeId() const { return nodes.size()-1; } |
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[813] | 94 | /// Maximum edge ID. |
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| 95 | |
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| 96 | /// Maximum edge ID. |
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| 97 | ///\sa id(Edge) |
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[1791] | 98 | int maxEdgeId() const { return edges.size()-1; } |
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[108] | 99 | |
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[986] | 100 | Node source(Edge e) const { return edges[e.n].source; } |
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| 101 | Node target(Edge e) const { return edges[e.n].target; } |
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[104] | 102 | |
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[813] | 103 | /// Node ID. |
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| 104 | |
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| 105 | /// The ID of a valid Node is a nonnegative integer not greater than |
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[1791] | 106 | /// \ref maxNodeId(). The range of the ID's is not surely continuous |
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| 107 | /// and the greatest node ID can be actually less then \ref maxNodeId(). |
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[813] | 108 | /// |
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| 109 | /// The ID of the \ref INVALID node is -1. |
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| 110 | ///\return The ID of the node \c v. |
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[713] | 111 | static int id(Node v) { return v.n; } |
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[813] | 112 | /// Edge ID. |
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| 113 | |
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| 114 | /// The ID of a valid Edge is a nonnegative integer not greater than |
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[1791] | 115 | /// \ref maxEdgeId(). The range of the ID's is not surely continuous |
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| 116 | /// and the greatest edge ID can be actually less then \ref maxEdgeId(). |
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[813] | 117 | /// |
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| 118 | /// The ID of the \ref INVALID edge is -1. |
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| 119 | ///\return The ID of the edge \c e. |
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[713] | 120 | static int id(Edge e) { return e.n; } |
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[104] | 121 | |
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[1791] | 122 | static Node nodeFromId(int id) { return Node(id);} |
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[1106] | 123 | |
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[1791] | 124 | static Edge edgeFromId(int id) { return Edge(id);} |
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[1106] | 125 | |
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[164] | 126 | Node addNode() { |
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| 127 | Node n; n.n=nodes.size(); |
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[104] | 128 | nodes.push_back(NodeT()); //FIXME: Hmmm... |
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| 129 | return n; |
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| 130 | } |
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[108] | 131 | |
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[164] | 132 | Edge addEdge(Node u, Node v) { |
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| 133 | Edge e; e.n=edges.size(); edges.push_back(EdgeT()); //FIXME: Hmmm... |
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[986] | 134 | edges[e.n].source=u.n; edges[e.n].target=v.n; |
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[104] | 135 | edges[e.n].next_out=nodes[u.n].first_out; |
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| 136 | edges[e.n].next_in=nodes[v.n].first_in; |
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| 137 | nodes[u.n].first_out=nodes[v.n].first_in=e.n; |
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[108] | 138 | |
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[104] | 139 | return e; |
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| 140 | } |
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| 141 | |
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[782] | 142 | void clear() { |
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| 143 | edges.clear(); |
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| 144 | nodes.clear(); |
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| 145 | } |
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[104] | 146 | |
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[946] | 147 | |
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[164] | 148 | class Node { |
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[946] | 149 | friend class SmartGraphBase; |
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[973] | 150 | friend class SmartGraph; |
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[104] | 151 | |
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| 152 | protected: |
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| 153 | int n; |
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[164] | 154 | Node(int nn) {n=nn;} |
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[104] | 155 | public: |
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[164] | 156 | Node() {} |
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[503] | 157 | Node (Invalid) { n=-1; } |
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[164] | 158 | bool operator==(const Node i) const {return n==i.n;} |
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| 159 | bool operator!=(const Node i) const {return n!=i.n;} |
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| 160 | bool operator<(const Node i) const {return n<i.n;} |
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[104] | 161 | }; |
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| 162 | |
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| 163 | |
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[164] | 164 | class Edge { |
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[946] | 165 | friend class SmartGraphBase; |
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[973] | 166 | friend class SmartGraph; |
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[185] | 167 | |
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[104] | 168 | protected: |
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| 169 | int n; |
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[905] | 170 | Edge(int nn) {n=nn;} |
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[706] | 171 | public: |
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[164] | 172 | Edge() { } |
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[174] | 173 | Edge (Invalid) { n=-1; } |
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[164] | 174 | bool operator==(const Edge i) const {return n==i.n;} |
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| 175 | bool operator!=(const Edge i) const {return n!=i.n;} |
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| 176 | bool operator<(const Edge i) const {return n<i.n;} |
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[946] | 177 | }; |
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[905] | 178 | |
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[946] | 179 | void first(Node& node) const { |
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| 180 | node.n = nodes.size() - 1; |
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| 181 | } |
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| 182 | |
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| 183 | static void next(Node& node) { |
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| 184 | --node.n; |
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| 185 | } |
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| 186 | |
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| 187 | void first(Edge& edge) const { |
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| 188 | edge.n = edges.size() - 1; |
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| 189 | } |
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| 190 | |
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| 191 | static void next(Edge& edge) { |
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| 192 | --edge.n; |
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| 193 | } |
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| 194 | |
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| 195 | void firstOut(Edge& edge, const Node& node) const { |
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| 196 | edge.n = nodes[node.n].first_out; |
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| 197 | } |
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| 198 | |
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| 199 | void nextOut(Edge& edge) const { |
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| 200 | edge.n = edges[edge.n].next_out; |
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| 201 | } |
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| 202 | |
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| 203 | void firstIn(Edge& edge, const Node& node) const { |
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| 204 | edge.n = nodes[node.n].first_in; |
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| 205 | } |
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[104] | 206 | |
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[946] | 207 | void nextIn(Edge& edge) const { |
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| 208 | edge.n = edges[edge.n].next_in; |
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| 209 | } |
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[105] | 210 | |
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[1284] | 211 | Node _split(Node n, bool connect = true) |
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| 212 | { |
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| 213 | Node b = addNode(); |
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| 214 | nodes[b.n].first_out=nodes[n.n].first_out; |
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| 215 | nodes[n.n].first_out=-1; |
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| 216 | for(int i=nodes[b.n].first_out;i!=-1;i++) edges[i].source=b.n; |
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| 217 | if(connect) addEdge(n,b); |
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| 218 | return b; |
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| 219 | } |
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| 220 | |
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[104] | 221 | }; |
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[185] | 222 | |
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[1979] | 223 | typedef GraphExtender<SmartGraphBase> ExtendedSmartGraphBase; |
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[937] | 224 | |
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[1791] | 225 | /// \ingroup graphs |
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[1161] | 226 | |
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[950] | 227 | ///A smart graph class. |
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[937] | 228 | |
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[950] | 229 | ///This is a simple and fast graph implementation. |
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| 230 | ///It is also quite memory efficient, but at the price |
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[974] | 231 | ///that <b> it does support only limited (only stack-like) |
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| 232 | ///node and edge deletions</b>. |
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[950] | 233 | ///It conforms to |
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[959] | 234 | ///the \ref concept::ExtendableGraph "ExtendableGraph" concept. |
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| 235 | ///\sa concept::ExtendableGraph. |
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[950] | 236 | /// |
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| 237 | ///\author Alpar Juttner |
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[1669] | 238 | class SmartGraph : public ExtendedSmartGraphBase { |
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[969] | 239 | public: |
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[1979] | 240 | |
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| 241 | typedef ExtendedSmartGraphBase Parent; |
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| 242 | |
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[1770] | 243 | class Snapshot; |
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| 244 | friend class Snapshot; |
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[973] | 245 | |
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[1011] | 246 | protected: |
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[1770] | 247 | void restoreSnapshot(const Snapshot &s) |
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[973] | 248 | { |
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[1457] | 249 | while(s.edge_num<edges.size()) { |
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[1040] | 250 | Parent::getNotifier(Edge()).erase(Edge(edges.size()-1)); |
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[986] | 251 | nodes[edges.back().target].first_in=edges.back().next_in; |
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| 252 | nodes[edges.back().source].first_out=edges.back().next_out; |
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[973] | 253 | edges.pop_back(); |
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| 254 | } |
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| 255 | //nodes.resize(s.nodes_num); |
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[1457] | 256 | while(s.node_num<nodes.size()) { |
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[1040] | 257 | Parent::getNotifier(Node()).erase(Node(nodes.size()-1)); |
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[973] | 258 | nodes.pop_back(); |
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| 259 | } |
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[1011] | 260 | } |
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| 261 | |
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| 262 | public: |
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[1284] | 263 | |
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| 264 | ///Split a node. |
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| 265 | |
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| 266 | ///This function splits a node. First a new node is added to the graph, |
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| 267 | ///then the source of each outgoing edge of \c n is moved to this new node. |
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| 268 | ///If \c connect is \c true (this is the default value), then a new edge |
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| 269 | ///from \c n to the newly created node is also added. |
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| 270 | ///\return The newly created node. |
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| 271 | /// |
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| 272 | ///\note The <tt>Edge</tt>s |
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| 273 | ///referencing a moved edge remain |
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| 274 | ///valid. However <tt>InEdge</tt>'s and <tt>OutEdge</tt>'s |
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| 275 | ///may be invalidated. |
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[1770] | 276 | ///\warning This functionality cannot be used together with the Snapshot |
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[1284] | 277 | ///feature. |
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| 278 | ///\todo It could be implemented in a bit faster way. |
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| 279 | Node split(Node n, bool connect = true) |
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| 280 | { |
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[1718] | 281 | Node b = _split(n,connect); |
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| 282 | return b; |
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[1284] | 283 | } |
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| 284 | |
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| 285 | |
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[1011] | 286 | ///Class to make a snapshot of the graph and to restrore to it later. |
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| 287 | |
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| 288 | ///Class to make a snapshot of the graph and to restrore to it later. |
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| 289 | /// |
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| 290 | ///The newly added nodes and edges can be removed using the |
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| 291 | ///restore() function. |
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| 292 | ///\note After you restore a state, you cannot restore |
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| 293 | ///a later state, in other word you cannot add again the edges deleted |
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[1770] | 294 | ///by restore() using another Snapshot instance. |
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[1011] | 295 | /// |
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[1770] | 296 | class Snapshot |
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[1011] | 297 | { |
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| 298 | SmartGraph *g; |
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| 299 | protected: |
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| 300 | friend class SmartGraph; |
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| 301 | unsigned int node_num; |
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| 302 | unsigned int edge_num; |
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| 303 | public: |
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[1274] | 304 | ///Default constructor. |
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[1011] | 305 | |
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[1274] | 306 | ///Default constructor. |
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[1011] | 307 | ///To actually make a snapshot you must call save(). |
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| 308 | /// |
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[1770] | 309 | Snapshot() : g(0) {} |
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[1011] | 310 | ///Constructor that immediately makes a snapshot |
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| 311 | |
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| 312 | ///This constructor immediately makes a snapshot of the graph. |
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| 313 | ///\param _g The graph we make a snapshot of. |
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[1770] | 314 | Snapshot(SmartGraph &_g) :g(&_g) { |
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[1011] | 315 | node_num=g->nodes.size(); |
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| 316 | edge_num=g->edges.size(); |
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| 317 | } |
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| 318 | |
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| 319 | ///Make a snapshot. |
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| 320 | |
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| 321 | ///Make a snapshot of the graph. |
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| 322 | /// |
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| 323 | ///This function can be called more than once. In case of a repeated |
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| 324 | ///call, the previous snapshot gets lost. |
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| 325 | ///\param _g The graph we make the snapshot of. |
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| 326 | void save(SmartGraph &_g) |
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| 327 | { |
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| 328 | g=&_g; |
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| 329 | node_num=g->nodes.size(); |
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| 330 | edge_num=g->edges.size(); |
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| 331 | } |
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| 332 | |
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| 333 | ///Undo the changes until a snapshot. |
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| 334 | |
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| 335 | ///Undo the changes until a snapshot created by save(). |
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| 336 | /// |
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| 337 | ///\note After you restored a state, you cannot restore |
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| 338 | ///a later state, in other word you cannot add again the edges deleted |
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| 339 | ///by restore(). |
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| 340 | /// |
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| 341 | ///\todo This function might be called undo(). |
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| 342 | |
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| 343 | void restore() |
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| 344 | { |
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[1770] | 345 | g->restoreSnapshot(*this); |
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[1011] | 346 | } |
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| 347 | }; |
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[973] | 348 | }; |
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[1034] | 349 | |
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| 350 | |
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| 351 | /**************** Undirected List Graph ****************/ |
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| 352 | |
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[1979] | 353 | typedef UGraphExtender<UGraphBaseExtender<SmartGraphBase> > |
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| 354 | ExtendedSmartUGraphBase; |
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[1034] | 355 | |
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[1909] | 356 | /// \ingroup graphs |
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[1035] | 357 | /// |
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[1909] | 358 | /// \brief A smart undirected graph class. |
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[1035] | 359 | /// |
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[1909] | 360 | /// This is a simple and fast undirected graph implementation. |
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| 361 | /// It is also quite memory efficient, but at the price |
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| 362 | /// that <b> it does support only limited (only stack-like) |
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| 363 | /// node and edge deletions</b>. |
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| 364 | /// Except from this it conforms to |
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| 365 | /// the \ref concept::UGraph "UGraph" concept. |
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| 366 | /// \sa concept::UGraph. |
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| 367 | /// |
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| 368 | /// \todo Snapshot hasn't been implemented yet. |
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| 369 | /// |
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| 370 | class SmartUGraph : public ExtendedSmartUGraphBase { |
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[1034] | 371 | }; |
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| 372 | |
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[1820] | 373 | |
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[1910] | 374 | class SmartBpUGraphBase { |
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[1820] | 375 | public: |
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| 376 | |
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| 377 | class NodeSetError : public LogicError { |
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| 378 | virtual const char* exceptionName() const { |
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[1910] | 379 | return "lemon::SmartBpUGraph::NodeSetError"; |
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[1820] | 380 | } |
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| 381 | }; |
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| 382 | |
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| 383 | protected: |
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| 384 | |
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| 385 | struct NodeT { |
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| 386 | int first; |
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| 387 | NodeT() {} |
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| 388 | NodeT(int _first) : first(_first) {} |
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| 389 | }; |
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| 390 | |
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| 391 | struct EdgeT { |
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[1910] | 392 | int aNode, next_out; |
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| 393 | int bNode, next_in; |
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[1820] | 394 | }; |
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| 395 | |
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[1910] | 396 | std::vector<NodeT> aNodes; |
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| 397 | std::vector<NodeT> bNodes; |
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[1820] | 398 | |
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| 399 | std::vector<EdgeT> edges; |
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| 400 | |
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| 401 | public: |
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| 402 | |
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| 403 | class Node { |
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[1910] | 404 | friend class SmartBpUGraphBase; |
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[1820] | 405 | protected: |
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| 406 | int id; |
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| 407 | |
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| 408 | Node(int _id) : id(_id) {} |
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| 409 | public: |
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| 410 | Node() {} |
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| 411 | Node(Invalid) { id = -1; } |
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| 412 | bool operator==(const Node i) const {return id==i.id;} |
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| 413 | bool operator!=(const Node i) const {return id!=i.id;} |
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| 414 | bool operator<(const Node i) const {return id<i.id;} |
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| 415 | }; |
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| 416 | |
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| 417 | class Edge { |
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[1910] | 418 | friend class SmartBpUGraphBase; |
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[1820] | 419 | protected: |
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| 420 | int id; |
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| 421 | |
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| 422 | Edge(int _id) { id = _id;} |
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| 423 | public: |
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| 424 | Edge() {} |
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| 425 | Edge (Invalid) { id = -1; } |
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| 426 | bool operator==(const Edge i) const {return id==i.id;} |
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| 427 | bool operator!=(const Edge i) const {return id!=i.id;} |
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| 428 | bool operator<(const Edge i) const {return id<i.id;} |
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| 429 | }; |
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| 430 | |
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[1910] | 431 | void firstANode(Node& node) const { |
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| 432 | node.id = 2 * aNodes.size() - 2; |
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[1820] | 433 | if (node.id < 0) node.id = -1; |
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| 434 | } |
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[1910] | 435 | void nextANode(Node& node) const { |
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[1820] | 436 | node.id -= 2; |
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| 437 | if (node.id < 0) node.id = -1; |
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| 438 | } |
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| 439 | |
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[1910] | 440 | void firstBNode(Node& node) const { |
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| 441 | node.id = 2 * bNodes.size() - 1; |
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[1820] | 442 | } |
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[1910] | 443 | void nextBNode(Node& node) const { |
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[1820] | 444 | node.id -= 2; |
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| 445 | } |
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| 446 | |
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| 447 | void first(Node& node) const { |
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[1910] | 448 | if (aNodes.size() > 0) { |
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| 449 | node.id = 2 * aNodes.size() - 2; |
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[1820] | 450 | } else { |
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[1910] | 451 | node.id = 2 * bNodes.size() - 1; |
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[1820] | 452 | } |
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| 453 | } |
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| 454 | void next(Node& node) const { |
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| 455 | node.id -= 2; |
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| 456 | if (node.id == -2) { |
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[1910] | 457 | node.id = 2 * bNodes.size() - 1; |
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[1820] | 458 | } |
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| 459 | } |
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| 460 | |
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| 461 | void first(Edge& edge) const { |
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| 462 | edge.id = edges.size() - 1; |
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| 463 | } |
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| 464 | void next(Edge& edge) const { |
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| 465 | --edge.id; |
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| 466 | } |
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| 467 | |
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[1910] | 468 | void firstOut(Edge& edge, const Node& node) const { |
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[1820] | 469 | LEMON_ASSERT((node.id & 1) == 0, NodeSetError()); |
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[1910] | 470 | edge.id = aNodes[node.id >> 1].first; |
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[1820] | 471 | } |
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[1910] | 472 | void nextOut(Edge& edge) const { |
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| 473 | edge.id = edges[edge.id].next_out; |
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[1820] | 474 | } |
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| 475 | |
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[1910] | 476 | void firstIn(Edge& edge, const Node& node) const { |
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[1820] | 477 | LEMON_ASSERT((node.id & 1) == 1, NodeSetError()); |
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[1910] | 478 | edge.id = bNodes[node.id >> 1].first; |
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[1820] | 479 | } |
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[1910] | 480 | void nextIn(Edge& edge) const { |
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| 481 | edge.id = edges[edge.id].next_in; |
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[1820] | 482 | } |
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| 483 | |
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| 484 | static int id(const Node& node) { |
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| 485 | return node.id; |
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| 486 | } |
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| 487 | static Node nodeFromId(int id) { |
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| 488 | return Node(id); |
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| 489 | } |
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| 490 | int maxNodeId() const { |
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[1910] | 491 | return aNodes.size() > bNodes.size() ? |
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| 492 | aNodes.size() * 2 - 2 : bNodes.size() * 2 - 1; |
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[1820] | 493 | } |
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| 494 | |
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| 495 | static int id(const Edge& edge) { |
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| 496 | return edge.id; |
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| 497 | } |
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| 498 | static Edge edgeFromId(int id) { |
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| 499 | return Edge(id); |
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| 500 | } |
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| 501 | int maxEdgeId() const { |
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| 502 | return edges.size(); |
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| 503 | } |
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| 504 | |
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[1910] | 505 | static int aNodeId(const Node& node) { |
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[1820] | 506 | return node.id >> 1; |
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| 507 | } |
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[1995] | 508 | static Node fromANodeId(int id) { |
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[1820] | 509 | return Node(id << 1); |
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| 510 | } |
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[1910] | 511 | int maxANodeId() const { |
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| 512 | return aNodes.size(); |
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[1820] | 513 | } |
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| 514 | |
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[1910] | 515 | static int bNodeId(const Node& node) { |
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[1820] | 516 | return node.id >> 1; |
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| 517 | } |
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[1910] | 518 | static Node fromBNodeId(int id) { |
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[1820] | 519 | return Node((id << 1) + 1); |
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| 520 | } |
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[1910] | 521 | int maxBNodeId() const { |
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| 522 | return bNodes.size(); |
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[1820] | 523 | } |
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| 524 | |
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[1910] | 525 | Node aNode(const Edge& edge) const { |
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| 526 | return Node(edges[edge.id].aNode); |
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[1820] | 527 | } |
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[1910] | 528 | Node bNode(const Edge& edge) const { |
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| 529 | return Node(edges[edge.id].bNode); |
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[1820] | 530 | } |
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| 531 | |
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[1910] | 532 | static bool aNode(const Node& node) { |
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[1820] | 533 | return (node.id & 1) == 0; |
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| 534 | } |
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| 535 | |
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[1910] | 536 | static bool bNode(const Node& node) { |
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[1820] | 537 | return (node.id & 1) == 1; |
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| 538 | } |
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| 539 | |
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[1910] | 540 | Node addANode() { |
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[1820] | 541 | NodeT nodeT; |
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| 542 | nodeT.first = -1; |
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[1910] | 543 | aNodes.push_back(nodeT); |
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| 544 | return Node(aNodes.size() * 2 - 2); |
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[1820] | 545 | } |
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| 546 | |
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[1910] | 547 | Node addBNode() { |
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[1820] | 548 | NodeT nodeT; |
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| 549 | nodeT.first = -1; |
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[1910] | 550 | bNodes.push_back(nodeT); |
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| 551 | return Node(bNodes.size() * 2 - 1); |
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[1820] | 552 | } |
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| 553 | |
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| 554 | Edge addEdge(const Node& source, const Node& target) { |
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| 555 | LEMON_ASSERT(((source.id ^ target.id) & 1) == 1, NodeSetError()); |
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| 556 | EdgeT edgeT; |
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| 557 | if ((source.id & 1) == 0) { |
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[1910] | 558 | edgeT.aNode = source.id; |
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| 559 | edgeT.bNode = target.id; |
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[1820] | 560 | } else { |
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[1910] | 561 | edgeT.aNode = target.id; |
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| 562 | edgeT.bNode = source.id; |
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[1820] | 563 | } |
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[1910] | 564 | edgeT.next_out = aNodes[edgeT.aNode >> 1].first; |
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| 565 | aNodes[edgeT.aNode >> 1].first = edges.size(); |
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| 566 | edgeT.next_in = bNodes[edgeT.bNode >> 1].first; |
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| 567 | bNodes[edgeT.bNode >> 1].first = edges.size(); |
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[1820] | 568 | edges.push_back(edgeT); |
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| 569 | return Edge(edges.size() - 1); |
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| 570 | } |
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| 571 | |
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| 572 | void clear() { |
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[1910] | 573 | aNodes.clear(); |
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| 574 | bNodes.clear(); |
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[1820] | 575 | edges.clear(); |
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| 576 | } |
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| 577 | |
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[2031] | 578 | typedef True NodeNumTag; |
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| 579 | int nodeNum() const { return aNodes.size() + bNodes.size(); } |
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| 580 | int aNodeNum() const { return aNodes.size(); } |
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| 581 | int bNodeNum() const { return bNodes.size(); } |
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| 582 | |
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| 583 | typedef True EdgeNumTag; |
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| 584 | int edgeNum() const { return edges.size(); } |
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| 585 | |
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[1820] | 586 | }; |
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| 587 | |
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| 588 | |
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[1979] | 589 | typedef BpUGraphExtender< BpUGraphBaseExtender< |
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| 590 | SmartBpUGraphBase> > ExtendedSmartBpUGraphBase; |
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[1820] | 591 | |
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[1910] | 592 | /// \ingroup graphs |
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| 593 | /// |
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| 594 | /// \brief A smart bipartite undirected graph class. |
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| 595 | /// |
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| 596 | /// This is a simple and fast bipartite undirected graph implementation. |
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| 597 | /// It is also quite memory efficient, but at the price |
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| 598 | /// that <b> it does not support node and edge deletions</b>. |
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| 599 | /// Except from this it conforms to |
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| 600 | /// the \ref concept::BpUGraph "BpUGraph" concept. |
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| 601 | /// \sa concept::BpUGraph. |
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| 602 | /// |
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| 603 | class SmartBpUGraph : public ExtendedSmartBpUGraphBase {}; |
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[1820] | 604 | |
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[950] | 605 | |
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[407] | 606 | /// @} |
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[921] | 607 | } //namespace lemon |
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[104] | 608 | |
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[157] | 609 | |
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[921] | 610 | #endif //LEMON_SMART_GRAPH_H |
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