1 | // -*- c++ -*- |
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2 | |
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3 | #ifndef HUGO_FULL_GRAPH_H |
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4 | #define HUGO_FULL_GRAPH_H |
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5 | |
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6 | ///\ingroup graphs |
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7 | ///\file |
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8 | ///\brief FullGraph and SymFullGraph classes. |
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9 | |
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10 | #include <vector> |
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11 | #include <limits.h> |
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12 | |
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13 | #include <hugo/invalid.h> |
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14 | |
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15 | namespace hugo { |
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16 | |
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17 | /// \addtogroup graphs |
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18 | /// @{ |
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19 | |
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20 | ///A full graph class. |
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21 | |
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22 | ///This is a simple and fast directed full graph implementation. |
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23 | ///It is completely static, so you can neither add nor delete either |
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24 | ///edges or nodes. |
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25 | ///Otherwise it conforms to the graph interface documented under |
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26 | ///the description of \ref GraphSkeleton. |
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27 | ///\sa \ref GraphSkeleton. |
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28 | ///\todo Shouldn't we avoid loops? |
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29 | /// |
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30 | ///\author Alpar Juttner |
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31 | class FullGraph { |
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32 | int NodeNum; |
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33 | int EdgeNum; |
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34 | public: |
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35 | template <typename T> class EdgeMap; |
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36 | template <typename T> class NodeMap; |
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37 | |
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38 | class Node; |
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39 | class Edge; |
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40 | class NodeIt; |
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41 | class EdgeIt; |
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42 | class OutEdgeIt; |
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43 | class InEdgeIt; |
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44 | |
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45 | template <typename T> class NodeMap; |
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46 | template <typename T> class EdgeMap; |
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47 | |
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48 | public: |
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49 | |
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50 | ///Creates a full graph with \c n nodes. |
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51 | FullGraph(int n) : NodeNum(n), EdgeNum(NodeNum*NodeNum) { } |
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52 | /// |
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53 | FullGraph(const FullGraph &_g) |
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54 | : NodeNum(_g.nodeNum()), EdgeNum(NodeNum*NodeNum) { } |
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55 | |
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56 | int nodeNum() const { return NodeNum; } //FIXME: What is this? |
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57 | int edgeNum() const { return EdgeNum; } //FIXME: What is this? |
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58 | |
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59 | int maxNodeId() const { return NodeNum; } //FIXME: What is this? |
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60 | int maxEdgeId() const { return EdgeNum; } //FIXME: What is this? |
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61 | |
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62 | Node tail(Edge e) const { return e.n%NodeNum; } |
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63 | Node head(Edge e) const { return e.n/NodeNum; } |
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64 | |
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65 | Node aNode(OutEdgeIt e) const { return tail(e); } |
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66 | Node aNode(InEdgeIt e) const { return head(e); } |
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67 | |
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68 | Node bNode(OutEdgeIt e) const { return head(e); } |
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69 | Node bNode(InEdgeIt e) const { return tail(e); } |
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70 | |
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71 | NodeIt& first(NodeIt& v) const { |
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72 | v=NodeIt(*this); return v; } |
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73 | EdgeIt& first(EdgeIt& e) const { |
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74 | e=EdgeIt(*this); return e; } |
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75 | OutEdgeIt& first(OutEdgeIt& e, const Node v) const { |
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76 | e=OutEdgeIt(*this,v); return e; } |
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77 | InEdgeIt& first(InEdgeIt& e, const Node v) const { |
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78 | e=InEdgeIt(*this,v); return e; } |
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79 | |
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80 | static bool valid(Edge e) { return e.n!=-1; } |
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81 | static bool valid(Node n) { return n.n!=-1; } |
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82 | |
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83 | template <typename It> It getNext(It it) const |
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84 | { It tmp(it); return next(tmp); } |
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85 | |
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86 | NodeIt& next(NodeIt& it) const { |
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87 | it.n=(it.n+2)%(NodeNum+1)-1; |
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88 | return it; |
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89 | } |
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90 | OutEdgeIt& next(OutEdgeIt& it) const |
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91 | { it.n+=NodeNum; if(it.n>=EdgeNum) it.n=-1; return it; } |
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92 | InEdgeIt& next(InEdgeIt& it) const |
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93 | { if(!((++it.n)%NodeNum)) it.n=-1; return it; } |
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94 | static EdgeIt& next(EdgeIt& it) { --it.n; return it; } |
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95 | |
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96 | static int id(Node v) { return v.n; } |
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97 | static int id(Edge e) { return e.n; } |
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98 | |
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99 | class Node { |
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100 | friend class FullGraph; |
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101 | template <typename T> friend class NodeMap; |
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102 | |
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103 | friend class Edge; |
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104 | friend class OutEdgeIt; |
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105 | friend class InEdgeIt; |
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106 | friend class SymEdge; |
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107 | |
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108 | protected: |
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109 | int n; |
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110 | friend int FullGraph::id(Node v) const; |
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111 | Node(int nn) {n=nn;} |
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112 | public: |
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113 | Node() {} |
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114 | Node (Invalid) { n=-1; } |
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115 | bool operator==(const Node i) const {return n==i.n;} |
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116 | bool operator!=(const Node i) const {return n!=i.n;} |
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117 | bool operator<(const Node i) const {return n<i.n;} |
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118 | }; |
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119 | |
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120 | class NodeIt : public Node { |
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121 | friend class FullGraph; |
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122 | public: |
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123 | NodeIt() : Node() { } |
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124 | NodeIt(Invalid i) : Node(i) { } |
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125 | NodeIt(const FullGraph& G) : Node(G.NodeNum?0:-1) { } |
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126 | ///\todo Undocumented conversion Node -\> NodeIt. |
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127 | NodeIt(const FullGraph& G, const Node &n) : Node(n) { } |
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128 | }; |
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129 | |
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130 | class Edge { |
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131 | friend class FullGraph; |
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132 | template <typename T> friend class EdgeMap; |
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133 | |
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134 | friend class Node; |
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135 | friend class NodeIt; |
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136 | protected: |
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137 | int n; //NodeNum*head+tail; |
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138 | friend int FullGraph::id(Edge e) const; |
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139 | |
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140 | Edge(int nn) {n=nn;} |
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141 | public: |
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142 | Edge() { } |
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143 | Edge (Invalid) { n=-1; } |
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144 | bool operator==(const Edge i) const {return n==i.n;} |
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145 | bool operator!=(const Edge i) const {return n!=i.n;} |
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146 | bool operator<(const Edge i) const {return n<i.n;} |
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147 | ///\bug This is a workaround until somebody tells me how to |
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148 | ///make class \c SymFullGraph::SymEdgeMap friend of Edge |
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149 | int &idref() {return n;} |
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150 | const int &idref() const {return n;} |
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151 | }; |
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152 | |
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153 | class EdgeIt : public Edge { |
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154 | friend class FullGraph; |
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155 | public: |
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156 | EdgeIt(const FullGraph& G) : Edge(G.EdgeNum-1) { } |
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157 | EdgeIt (Invalid i) : Edge(i) { } |
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158 | EdgeIt() : Edge() { } |
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159 | ///\bug This is a workaround until somebody tells me how to |
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160 | ///make class \c SymFullGraph::SymEdgeMap friend of Edge |
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161 | int &idref() {return n;} |
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162 | }; |
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163 | |
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164 | class OutEdgeIt : public Edge { |
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165 | friend class FullGraph; |
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166 | public: |
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167 | OutEdgeIt() : Edge() { } |
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168 | OutEdgeIt (Invalid i) : Edge(i) { } |
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169 | |
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170 | OutEdgeIt(const FullGraph& G,const Node v) |
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171 | : Edge(v.n) {} |
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172 | }; |
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173 | |
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174 | class InEdgeIt : public Edge { |
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175 | friend class FullGraph; |
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176 | public: |
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177 | InEdgeIt() : Edge() { } |
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178 | InEdgeIt (Invalid i) : Edge(i) { } |
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179 | InEdgeIt(const FullGraph& G,Node v) :Edge(v.n*G.NodeNum){} |
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180 | }; |
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181 | |
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182 | template <typename T> class NodeMap |
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183 | { |
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184 | std::vector<T> container; |
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185 | |
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186 | public: |
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187 | typedef T ValueType; |
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188 | typedef Node KeyType; |
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189 | |
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190 | NodeMap(const FullGraph &_G) : container(_G.NodeNum) { } |
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191 | NodeMap(const FullGraph &_G,const T &t) : container(_G.NodeNum,t) { } |
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192 | NodeMap(const NodeMap<T> &m) : container(m.container) { } |
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193 | |
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194 | template<typename TT> friend class NodeMap; |
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195 | ///\todo It can copy between different types. |
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196 | template<typename TT> NodeMap(const NodeMap<TT> &m) |
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197 | : container(m.container.size()) |
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198 | { |
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199 | typename std::vector<TT>::const_iterator i; |
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200 | for(typename std::vector<TT>::const_iterator i=m.container.begin(); |
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201 | i!=m.container.end(); |
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202 | i++) |
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203 | container.push_back(*i); |
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204 | } |
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205 | void set(Node n, T a) { container[n.n]=a; } |
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206 | //'T& operator[](Node n)' would be wrong here |
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207 | typename std::vector<T>::reference |
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208 | operator[](Node n) { return container[n.n]; } |
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209 | //'const T& operator[](Node n)' would be wrong here |
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210 | typename std::vector<T>::const_reference |
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211 | operator[](Node n) const { return container[n.n]; } |
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212 | |
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213 | ///\warning There is no safety check at all! |
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214 | ///Using operator = between maps attached to different graph may |
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215 | ///cause serious problem. |
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216 | ///\todo Is this really so? |
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217 | ///\todo It can copy between different types. |
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218 | const NodeMap<T>& operator=(const NodeMap<T> &m) |
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219 | { |
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220 | container = m.container; |
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221 | return *this; |
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222 | } |
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223 | template<typename TT> |
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224 | const NodeMap<T>& operator=(const NodeMap<TT> &m) |
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225 | { |
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226 | std::copy(m.container.begin(), m.container.end(), container.begin()); |
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227 | return *this; |
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228 | } |
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229 | |
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230 | void update() {} //Useless for Dynamic Maps |
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231 | void update(T a) {} //Useless for Dynamic Maps |
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232 | }; |
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233 | |
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234 | template <typename T> class EdgeMap |
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235 | { |
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236 | std::vector<T> container; |
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237 | |
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238 | public: |
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239 | typedef T ValueType; |
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240 | typedef Edge KeyType; |
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241 | |
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242 | EdgeMap(const FullGraph &_G) : container(_G.EdgeNum) { } |
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243 | EdgeMap(const FullGraph &_G,const T &t) : container(_G.EdgeNum,t) { } |
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244 | EdgeMap(const EdgeMap<T> &m) : container(m.container) { } |
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245 | |
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246 | template<typename TT> friend class EdgeMap; |
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247 | ///\todo It can copy between different types. |
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248 | ///\todo We could use 'copy' |
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249 | template<typename TT> EdgeMap(const EdgeMap<TT> &m) : |
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250 | container(m.container.size()) |
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251 | { |
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252 | typename std::vector<TT>::const_iterator i; |
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253 | for(typename std::vector<TT>::const_iterator i=m.container.begin(); |
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254 | i!=m.container.end(); |
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255 | i++) |
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256 | container.push_back(*i); |
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257 | } |
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258 | void set(Edge n, T a) { container[n.n]=a; } |
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259 | //T get(Edge n) const { return container[n.n]; } |
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260 | typename std::vector<T>::reference |
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261 | operator[](Edge n) { return container[n.n]; } |
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262 | typename std::vector<T>::const_reference |
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263 | operator[](Edge n) const { return container[n.n]; } |
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264 | |
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265 | ///\warning There is no safety check at all! |
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266 | ///Using operator = between maps attached to different graph may |
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267 | ///cause serious problem. |
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268 | ///\todo Is this really so? |
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269 | ///\todo It can copy between different types. |
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270 | const EdgeMap<T>& operator=(const EdgeMap<T> &m) |
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271 | { |
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272 | container = m.container; |
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273 | return *this; |
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274 | } |
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275 | template<typename TT> |
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276 | const EdgeMap<T>& operator=(const EdgeMap<TT> &m) |
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277 | { |
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278 | std::copy(m.container.begin(), m.container.end(), container.begin()); |
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279 | return *this; |
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280 | } |
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281 | |
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282 | void update() {} |
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283 | void update(T a) {} |
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284 | }; |
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285 | |
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286 | }; |
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287 | |
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288 | /// @} |
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289 | |
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290 | } //namespace hugo |
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291 | |
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292 | |
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293 | |
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294 | |
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295 | #endif //HUGO_FULL_GRAPH_H |
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