[606] | 1 | // -*- c++ -*- |
---|
[591] | 2 | |
---|
| 3 | #ifndef HUGO_FULL_GRAPH_H |
---|
| 4 | #define HUGO_FULL_GRAPH_H |
---|
| 5 | |
---|
| 6 | ///\ingroup graphs |
---|
| 7 | ///\file |
---|
| 8 | ///\brief FullGraph and SymFullGraph classes. |
---|
| 9 | |
---|
| 10 | #include <vector> |
---|
| 11 | #include <limits.h> |
---|
| 12 | |
---|
| 13 | #include <hugo/invalid.h> |
---|
| 14 | |
---|
| 15 | namespace hugo { |
---|
| 16 | |
---|
| 17 | /// \addtogroup graphs |
---|
| 18 | /// @{ |
---|
| 19 | |
---|
| 20 | ///A full graph class. |
---|
| 21 | |
---|
| 22 | ///This is a simple and fast directed full graph implementation. |
---|
[606] | 23 | ///It is completely static, so you can neither add nor delete either |
---|
[591] | 24 | ///edges or nodes. |
---|
| 25 | ///Otherwise it conforms to the graph interface documented under |
---|
| 26 | ///the description of \ref GraphSkeleton. |
---|
| 27 | ///\sa \ref GraphSkeleton. |
---|
[752] | 28 | ///\todo What about loops? |
---|
| 29 | ///\todo Don't we need SymEdgeMap? |
---|
[591] | 30 | /// |
---|
| 31 | ///\author Alpar Juttner |
---|
| 32 | class FullGraph { |
---|
| 33 | int NodeNum; |
---|
| 34 | int EdgeNum; |
---|
| 35 | public: |
---|
| 36 | template <typename T> class EdgeMap; |
---|
| 37 | template <typename T> class NodeMap; |
---|
| 38 | |
---|
| 39 | class Node; |
---|
| 40 | class Edge; |
---|
| 41 | class NodeIt; |
---|
| 42 | class EdgeIt; |
---|
| 43 | class OutEdgeIt; |
---|
| 44 | class InEdgeIt; |
---|
| 45 | |
---|
| 46 | template <typename T> class NodeMap; |
---|
| 47 | template <typename T> class EdgeMap; |
---|
| 48 | |
---|
| 49 | public: |
---|
| 50 | |
---|
| 51 | ///Creates a full graph with \c n nodes. |
---|
| 52 | FullGraph(int n) : NodeNum(n), EdgeNum(NodeNum*NodeNum) { } |
---|
| 53 | /// |
---|
| 54 | FullGraph(const FullGraph &_g) |
---|
| 55 | : NodeNum(_g.nodeNum()), EdgeNum(NodeNum*NodeNum) { } |
---|
| 56 | |
---|
| 57 | int nodeNum() const { return NodeNum; } //FIXME: What is this? |
---|
| 58 | int edgeNum() const { return EdgeNum; } //FIXME: What is this? |
---|
| 59 | |
---|
| 60 | int maxNodeId() const { return NodeNum; } //FIXME: What is this? |
---|
| 61 | int maxEdgeId() const { return EdgeNum; } //FIXME: What is this? |
---|
| 62 | |
---|
| 63 | Node tail(Edge e) const { return e.n%NodeNum; } |
---|
| 64 | Node head(Edge e) const { return e.n/NodeNum; } |
---|
| 65 | |
---|
| 66 | NodeIt& first(NodeIt& v) const { |
---|
| 67 | v=NodeIt(*this); return v; } |
---|
| 68 | EdgeIt& first(EdgeIt& e) const { |
---|
| 69 | e=EdgeIt(*this); return e; } |
---|
| 70 | OutEdgeIt& first(OutEdgeIt& e, const Node v) const { |
---|
| 71 | e=OutEdgeIt(*this,v); return e; } |
---|
| 72 | InEdgeIt& first(InEdgeIt& e, const Node v) const { |
---|
| 73 | e=InEdgeIt(*this,v); return e; } |
---|
| 74 | |
---|
[713] | 75 | static int id(Node v) { return v.n; } |
---|
| 76 | static int id(Edge e) { return e.n; } |
---|
[591] | 77 | |
---|
[774] | 78 | /// Finds an edge between two nodes. |
---|
| 79 | |
---|
| 80 | /// Finds an edge from node \c u to node \c v. |
---|
| 81 | /// |
---|
| 82 | /// If \c prev is \ref INVALID (this is the default value), then |
---|
| 83 | /// It finds the first edge from \c u to \c v. Otherwise it looks for |
---|
| 84 | /// the next edge from \c u to \c v after \c prev. |
---|
| 85 | /// \return The found edge or INVALID if there is no such an edge. |
---|
| 86 | Edge findEdge(Node u,Node v, Edge prev = INVALID) |
---|
| 87 | { |
---|
| 88 | return prev.n==-1?Edge(*this,u.n,v.n):INVALID; |
---|
| 89 | } |
---|
| 90 | |
---|
| 91 | |
---|
[591] | 92 | class Node { |
---|
| 93 | friend class FullGraph; |
---|
| 94 | template <typename T> friend class NodeMap; |
---|
| 95 | |
---|
| 96 | friend class Edge; |
---|
| 97 | friend class OutEdgeIt; |
---|
| 98 | friend class InEdgeIt; |
---|
| 99 | friend class SymEdge; |
---|
| 100 | |
---|
| 101 | protected: |
---|
| 102 | int n; |
---|
[722] | 103 | friend int FullGraph::id(Node v); |
---|
[591] | 104 | Node(int nn) {n=nn;} |
---|
| 105 | public: |
---|
| 106 | Node() {} |
---|
| 107 | Node (Invalid) { n=-1; } |
---|
| 108 | bool operator==(const Node i) const {return n==i.n;} |
---|
| 109 | bool operator!=(const Node i) const {return n!=i.n;} |
---|
| 110 | bool operator<(const Node i) const {return n<i.n;} |
---|
| 111 | }; |
---|
| 112 | |
---|
| 113 | class NodeIt : public Node { |
---|
[774] | 114 | const FullGraph *G; |
---|
[591] | 115 | friend class FullGraph; |
---|
| 116 | public: |
---|
| 117 | NodeIt() : Node() { } |
---|
[774] | 118 | NodeIt(const FullGraph& _G,Node n) : Node(n), G(&_G) { } |
---|
[591] | 119 | NodeIt(Invalid i) : Node(i) { } |
---|
[774] | 120 | NodeIt(const FullGraph& _G) : Node(_G.NodeNum?0:-1), G(&_G) { } |
---|
[591] | 121 | ///\todo Undocumented conversion Node -\> NodeIt. |
---|
[774] | 122 | NodeIt& operator++() { n=(n+2)%(G->NodeNum+1)-1;return *this; } |
---|
[591] | 123 | }; |
---|
| 124 | |
---|
| 125 | class Edge { |
---|
| 126 | friend class FullGraph; |
---|
| 127 | template <typename T> friend class EdgeMap; |
---|
| 128 | |
---|
| 129 | friend class Node; |
---|
| 130 | friend class NodeIt; |
---|
| 131 | protected: |
---|
| 132 | int n; //NodeNum*head+tail; |
---|
[722] | 133 | friend int FullGraph::id(Edge e); |
---|
[591] | 134 | |
---|
[774] | 135 | Edge(int nn) : n(nn) {} |
---|
| 136 | Edge(const FullGraph &G, int tail, int head) : n(G.NodeNum*head+tail) {} |
---|
[591] | 137 | public: |
---|
| 138 | Edge() { } |
---|
| 139 | Edge (Invalid) { n=-1; } |
---|
| 140 | bool operator==(const Edge i) const {return n==i.n;} |
---|
| 141 | bool operator!=(const Edge i) const {return n!=i.n;} |
---|
| 142 | bool operator<(const Edge i) const {return n<i.n;} |
---|
| 143 | ///\bug This is a workaround until somebody tells me how to |
---|
| 144 | ///make class \c SymFullGraph::SymEdgeMap friend of Edge |
---|
| 145 | int &idref() {return n;} |
---|
| 146 | const int &idref() const {return n;} |
---|
| 147 | }; |
---|
| 148 | |
---|
| 149 | class EdgeIt : public Edge { |
---|
| 150 | friend class FullGraph; |
---|
| 151 | public: |
---|
[774] | 152 | EdgeIt(const FullGraph& _G) : Edge(_G.EdgeNum-1) { } |
---|
| 153 | EdgeIt(const FullGraph&, Edge e) : Edge(e) { } |
---|
[591] | 154 | EdgeIt (Invalid i) : Edge(i) { } |
---|
| 155 | EdgeIt() : Edge() { } |
---|
[774] | 156 | EdgeIt& operator++() { --n; return *this; } |
---|
| 157 | |
---|
[591] | 158 | ///\bug This is a workaround until somebody tells me how to |
---|
| 159 | ///make class \c SymFullGraph::SymEdgeMap friend of Edge |
---|
| 160 | int &idref() {return n;} |
---|
| 161 | }; |
---|
| 162 | |
---|
| 163 | class OutEdgeIt : public Edge { |
---|
[774] | 164 | const FullGraph *G; |
---|
[591] | 165 | friend class FullGraph; |
---|
| 166 | public: |
---|
| 167 | OutEdgeIt() : Edge() { } |
---|
[774] | 168 | OutEdgeIt(const FullGraph& _G, Edge e) : Edge(e), G(&_G) { } |
---|
[591] | 169 | OutEdgeIt (Invalid i) : Edge(i) { } |
---|
| 170 | |
---|
[774] | 171 | OutEdgeIt(const FullGraph& _G,const Node v) : Edge(v.n), G(&_G) {} |
---|
| 172 | |
---|
| 173 | OutEdgeIt& operator++() |
---|
| 174 | { n+=G->NodeNum; if(n>=G->EdgeNum) n=-1; return *this; } |
---|
| 175 | |
---|
[591] | 176 | }; |
---|
| 177 | |
---|
| 178 | class InEdgeIt : public Edge { |
---|
[774] | 179 | const FullGraph *G; |
---|
[591] | 180 | friend class FullGraph; |
---|
| 181 | public: |
---|
| 182 | InEdgeIt() : Edge() { } |
---|
[774] | 183 | InEdgeIt(const FullGraph& _G, Edge e) : Edge(e), G(&_G) { } |
---|
[591] | 184 | InEdgeIt (Invalid i) : Edge(i) { } |
---|
[774] | 185 | InEdgeIt(const FullGraph& _G,Node v) : Edge(v.n*_G.NodeNum), G(&_G) {} |
---|
| 186 | InEdgeIt& operator++() |
---|
| 187 | { if(!((++n)%G->NodeNum)) n=-1; return *this; } |
---|
[591] | 188 | }; |
---|
| 189 | |
---|
| 190 | template <typename T> class NodeMap |
---|
| 191 | { |
---|
| 192 | std::vector<T> container; |
---|
| 193 | |
---|
| 194 | public: |
---|
| 195 | typedef T ValueType; |
---|
| 196 | typedef Node KeyType; |
---|
| 197 | |
---|
| 198 | NodeMap(const FullGraph &_G) : container(_G.NodeNum) { } |
---|
| 199 | NodeMap(const FullGraph &_G,const T &t) : container(_G.NodeNum,t) { } |
---|
| 200 | NodeMap(const NodeMap<T> &m) : container(m.container) { } |
---|
| 201 | |
---|
| 202 | template<typename TT> friend class NodeMap; |
---|
| 203 | ///\todo It can copy between different types. |
---|
| 204 | template<typename TT> NodeMap(const NodeMap<TT> &m) |
---|
| 205 | : container(m.container.size()) |
---|
| 206 | { |
---|
| 207 | typename std::vector<TT>::const_iterator i; |
---|
| 208 | for(typename std::vector<TT>::const_iterator i=m.container.begin(); |
---|
| 209 | i!=m.container.end(); |
---|
| 210 | i++) |
---|
| 211 | container.push_back(*i); |
---|
| 212 | } |
---|
| 213 | void set(Node n, T a) { container[n.n]=a; } |
---|
| 214 | //'T& operator[](Node n)' would be wrong here |
---|
| 215 | typename std::vector<T>::reference |
---|
| 216 | operator[](Node n) { return container[n.n]; } |
---|
| 217 | //'const T& operator[](Node n)' would be wrong here |
---|
| 218 | typename std::vector<T>::const_reference |
---|
| 219 | operator[](Node n) const { return container[n.n]; } |
---|
| 220 | |
---|
| 221 | ///\warning There is no safety check at all! |
---|
| 222 | ///Using operator = between maps attached to different graph may |
---|
| 223 | ///cause serious problem. |
---|
| 224 | ///\todo Is this really so? |
---|
| 225 | ///\todo It can copy between different types. |
---|
| 226 | const NodeMap<T>& operator=(const NodeMap<T> &m) |
---|
| 227 | { |
---|
| 228 | container = m.container; |
---|
| 229 | return *this; |
---|
| 230 | } |
---|
| 231 | template<typename TT> |
---|
| 232 | const NodeMap<T>& operator=(const NodeMap<TT> &m) |
---|
| 233 | { |
---|
| 234 | std::copy(m.container.begin(), m.container.end(), container.begin()); |
---|
| 235 | return *this; |
---|
| 236 | } |
---|
| 237 | |
---|
| 238 | void update() {} //Useless for Dynamic Maps |
---|
| 239 | void update(T a) {} //Useless for Dynamic Maps |
---|
| 240 | }; |
---|
| 241 | |
---|
| 242 | template <typename T> class EdgeMap |
---|
| 243 | { |
---|
| 244 | std::vector<T> container; |
---|
| 245 | |
---|
| 246 | public: |
---|
| 247 | typedef T ValueType; |
---|
| 248 | typedef Edge KeyType; |
---|
| 249 | |
---|
| 250 | EdgeMap(const FullGraph &_G) : container(_G.EdgeNum) { } |
---|
| 251 | EdgeMap(const FullGraph &_G,const T &t) : container(_G.EdgeNum,t) { } |
---|
| 252 | EdgeMap(const EdgeMap<T> &m) : container(m.container) { } |
---|
| 253 | |
---|
| 254 | template<typename TT> friend class EdgeMap; |
---|
| 255 | ///\todo It can copy between different types. |
---|
| 256 | ///\todo We could use 'copy' |
---|
| 257 | template<typename TT> EdgeMap(const EdgeMap<TT> &m) : |
---|
| 258 | container(m.container.size()) |
---|
| 259 | { |
---|
| 260 | typename std::vector<TT>::const_iterator i; |
---|
| 261 | for(typename std::vector<TT>::const_iterator i=m.container.begin(); |
---|
| 262 | i!=m.container.end(); |
---|
| 263 | i++) |
---|
| 264 | container.push_back(*i); |
---|
| 265 | } |
---|
| 266 | void set(Edge n, T a) { container[n.n]=a; } |
---|
| 267 | //T get(Edge n) const { return container[n.n]; } |
---|
| 268 | typename std::vector<T>::reference |
---|
| 269 | operator[](Edge n) { return container[n.n]; } |
---|
| 270 | typename std::vector<T>::const_reference |
---|
| 271 | operator[](Edge n) const { return container[n.n]; } |
---|
| 272 | |
---|
| 273 | ///\warning There is no safety check at all! |
---|
| 274 | ///Using operator = between maps attached to different graph may |
---|
| 275 | ///cause serious problem. |
---|
| 276 | ///\todo Is this really so? |
---|
| 277 | ///\todo It can copy between different types. |
---|
| 278 | const EdgeMap<T>& operator=(const EdgeMap<T> &m) |
---|
| 279 | { |
---|
| 280 | container = m.container; |
---|
| 281 | return *this; |
---|
| 282 | } |
---|
| 283 | template<typename TT> |
---|
| 284 | const EdgeMap<T>& operator=(const EdgeMap<TT> &m) |
---|
| 285 | { |
---|
| 286 | std::copy(m.container.begin(), m.container.end(), container.begin()); |
---|
| 287 | return *this; |
---|
| 288 | } |
---|
[774] | 289 | |
---|
[591] | 290 | void update() {} |
---|
| 291 | void update(T a) {} |
---|
| 292 | }; |
---|
| 293 | |
---|
| 294 | }; |
---|
| 295 | |
---|
| 296 | /// @} |
---|
| 297 | |
---|
| 298 | } //namespace hugo |
---|
| 299 | |
---|
| 300 | |
---|
| 301 | |
---|
| 302 | |
---|
| 303 | #endif //HUGO_FULL_GRAPH_H |
---|