1 | // -*- c++ -*- |
---|
2 | #ifndef HUGO_GRAPH_WRAPPER_H |
---|
3 | #define HUGO_GRAPH_WRAPPER_H |
---|
4 | |
---|
5 | #include <invalid.h> |
---|
6 | #include <iter_map.h> |
---|
7 | |
---|
8 | namespace hugo { |
---|
9 | |
---|
10 | /// \addtogroup gwrappers |
---|
11 | /// @{ |
---|
12 | |
---|
13 | /// Graph wrappers |
---|
14 | |
---|
15 | /// A main parts of HUGOlib are the different graph structures, |
---|
16 | /// generic graph algorithms, graph concepts which couple these, and |
---|
17 | /// graph wrappers. While the previous ones are more or less clear, the |
---|
18 | /// latter notion needs further explanation. |
---|
19 | /// Graph wrappers are graph classes which serve for considering graph |
---|
20 | /// structures in different ways. A short example makes the notion much |
---|
21 | /// clearer. |
---|
22 | /// Suppose that we have an instance \c g of a directed graph |
---|
23 | /// type say \c ListGraph and an algorithm |
---|
24 | /// \code template<typename Graph> int algorithm(const Graph&); \endcode |
---|
25 | /// is needed to run on the reversely oriented graph. |
---|
26 | /// It may be expensive (in time or in memory usage) to copy |
---|
27 | /// \c g with the reverse orientation. |
---|
28 | /// Thus, a wrapper class |
---|
29 | /// \code template<typename Graph> class RevGraphWrapper; \endcode is used. |
---|
30 | /// The code looks as follows |
---|
31 | /// \code |
---|
32 | /// ListGraph g; |
---|
33 | /// RevGraphWrapper<ListGraph> rgw(g); |
---|
34 | /// int result=algorithm(rgw); |
---|
35 | /// \endcode |
---|
36 | /// After running the algorithm, the original graph \c g |
---|
37 | /// remains untouched. Thus the graph wrapper used above is to consider the |
---|
38 | /// original graph with reverse orientation. |
---|
39 | /// This techniques gives rise to an elegant code, and |
---|
40 | /// based on stable graph wrappers, complex algorithms can be |
---|
41 | /// implemented easily. |
---|
42 | /// In flow, circulation and bipartite matching problems, the residual |
---|
43 | /// graph is of particular importance. Combining a wrapper implementing |
---|
44 | /// this, shortest path algorithms and minimum mean cycle algorithms, |
---|
45 | /// a range of weighted and cardinality optimization algorithms can be |
---|
46 | /// obtained. For lack of space, for other examples, |
---|
47 | /// the interested user is referred to the detailed documentation of graph |
---|
48 | /// wrappers. |
---|
49 | /// The behavior of graph wrappers can be very different. Some of them keep |
---|
50 | /// capabilities of the original graph while in other cases this would be |
---|
51 | /// meaningless. This means that the concepts that they are a model of depend |
---|
52 | /// on the graph wrapper, and the wrapped graph(s). |
---|
53 | /// If an edge of \c rgw is deleted, this is carried out by |
---|
54 | /// deleting the corresponding edge of \c g. But for a residual |
---|
55 | /// graph, this operation has no sense. |
---|
56 | /// Let we stand one more example here to simplify your work. |
---|
57 | /// wrapper class |
---|
58 | /// \code template<typename Graph> class RevGraphWrapper; \endcode |
---|
59 | /// has constructor |
---|
60 | /// <tt> RevGraphWrapper(Graph& _g)</tt>. |
---|
61 | /// This means that in a situation, |
---|
62 | /// when a <tt> const ListGraph& </tt> reference to a graph is given, |
---|
63 | /// then it have to be instantiated with <tt>Graph=const ListGraph</tt>. |
---|
64 | /// \code |
---|
65 | /// int algorithm1(const ListGraph& g) { |
---|
66 | /// RevGraphWrapper<const ListGraph> rgw(g); |
---|
67 | /// return algorithm2(rgw); |
---|
68 | /// } |
---|
69 | /// \endcode |
---|
70 | template<typename Graph> |
---|
71 | class GraphWrapper { |
---|
72 | protected: |
---|
73 | Graph* graph; |
---|
74 | |
---|
75 | public: |
---|
76 | typedef Graph BaseGraph; |
---|
77 | typedef Graph ParentGraph; |
---|
78 | |
---|
79 | // GraphWrapper() : graph(0) { } |
---|
80 | GraphWrapper(Graph& _graph) : graph(&_graph) { } |
---|
81 | // void setGraph(Graph& _graph) { graph=&_graph; } |
---|
82 | // Graph& getGraph() const { return *graph; } |
---|
83 | |
---|
84 | // typedef typename Graph::Node Node; |
---|
85 | class Node : public Graph::Node { |
---|
86 | friend class GraphWrapper<Graph>; |
---|
87 | public: |
---|
88 | Node() { } |
---|
89 | Node(const typename Graph::Node& _n) : Graph::Node(_n) { } |
---|
90 | Node(const Invalid& i) : Graph::Node(i) { } |
---|
91 | }; |
---|
92 | class NodeIt { |
---|
93 | friend class GraphWrapper<Graph>; |
---|
94 | typename Graph::NodeIt n; |
---|
95 | public: |
---|
96 | NodeIt() { } |
---|
97 | NodeIt(const typename Graph::NodeIt& _n) : n(_n) { } |
---|
98 | NodeIt(const Invalid& i) : n(i) { } |
---|
99 | NodeIt(const GraphWrapper<Graph>& _G) : n(*(_G.graph)) { } |
---|
100 | operator Node() const { return Node(typename Graph::Node(n)); } |
---|
101 | }; |
---|
102 | // typedef typename Graph::Edge Edge; |
---|
103 | class Edge : public Graph::Edge { |
---|
104 | friend class GraphWrapper<Graph>; |
---|
105 | public: |
---|
106 | Edge() { } |
---|
107 | Edge(const typename Graph::Edge& _e) : Graph::Edge(_e) { } |
---|
108 | Edge(const Invalid& i) : Graph::Edge(i) { } |
---|
109 | }; |
---|
110 | class OutEdgeIt { |
---|
111 | friend class GraphWrapper<Graph>; |
---|
112 | typename Graph::OutEdgeIt e; |
---|
113 | public: |
---|
114 | OutEdgeIt() { } |
---|
115 | OutEdgeIt(const typename Graph::OutEdgeIt& _e) : e(_e) { } |
---|
116 | OutEdgeIt(const Invalid& i) : e(i) { } |
---|
117 | OutEdgeIt(const GraphWrapper<Graph>& _G, const Node& _n) : |
---|
118 | e(*(_G.graph), typename Graph::Node(_n)) { } |
---|
119 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
120 | }; |
---|
121 | class InEdgeIt { |
---|
122 | friend class GraphWrapper<Graph>; |
---|
123 | typename Graph::InEdgeIt e; |
---|
124 | public: |
---|
125 | InEdgeIt() { } |
---|
126 | InEdgeIt(const typename Graph::InEdgeIt& _e) : e(_e) { } |
---|
127 | InEdgeIt(const Invalid& i) : e(i) { } |
---|
128 | InEdgeIt(const GraphWrapper<Graph>& _G, const Node& _n) : |
---|
129 | e(*(_G.graph), typename Graph::Node(_n)) { } |
---|
130 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
131 | }; |
---|
132 | //typedef typename Graph::SymEdgeIt SymEdgeIt; |
---|
133 | class EdgeIt { |
---|
134 | friend class GraphWrapper<Graph>; |
---|
135 | typename Graph::EdgeIt e; |
---|
136 | public: |
---|
137 | EdgeIt() { } |
---|
138 | EdgeIt(const typename Graph::EdgeIt& _e) : e(_e) { } |
---|
139 | EdgeIt(const Invalid& i) : e(i) { } |
---|
140 | EdgeIt(const GraphWrapper<Graph>& _G) : e(*(_G.graph)) { } |
---|
141 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
142 | }; |
---|
143 | |
---|
144 | NodeIt& first(NodeIt& i) const { |
---|
145 | i=NodeIt(*this); return i; |
---|
146 | } |
---|
147 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
148 | i=OutEdgeIt(*this, p); return i; |
---|
149 | } |
---|
150 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
151 | i=InEdgeIt(*this, p); return i; |
---|
152 | } |
---|
153 | EdgeIt& first(EdgeIt& i) const { |
---|
154 | i=EdgeIt(*this); return i; |
---|
155 | } |
---|
156 | |
---|
157 | NodeIt& next(NodeIt& i) const { graph->next(i.n); return i; } |
---|
158 | OutEdgeIt& next(OutEdgeIt& i) const { graph->next(i.e); return i; } |
---|
159 | InEdgeIt& next(InEdgeIt& i) const { graph->next(i.e); return i; } |
---|
160 | EdgeIt& next(EdgeIt& i) const { graph->next(i.e); return i; } |
---|
161 | |
---|
162 | Node tail(const Edge& e) const { |
---|
163 | return Node(graph->tail(static_cast<typename Graph::Edge>(e))); } |
---|
164 | Node head(const Edge& e) const { |
---|
165 | return Node(graph->head(static_cast<typename Graph::Edge>(e))); } |
---|
166 | |
---|
167 | bool valid(const Node& n) const { |
---|
168 | return graph->valid(static_cast<typename Graph::Node>(n)); } |
---|
169 | bool valid(const Edge& e) const { |
---|
170 | return graph->valid(static_cast<typename Graph::Edge>(e)); } |
---|
171 | |
---|
172 | int nodeNum() const { return graph->nodeNum(); } |
---|
173 | int edgeNum() const { return graph->edgeNum(); } |
---|
174 | |
---|
175 | Node aNode(const OutEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
---|
176 | Node aNode(const InEdgeIt& e) const { return Node(graph->aNode(e.e)); } |
---|
177 | Node bNode(const OutEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
---|
178 | Node bNode(const InEdgeIt& e) const { return Node(graph->bNode(e.e)); } |
---|
179 | |
---|
180 | Node addNode() const { return Node(graph->addNode()); } |
---|
181 | Edge addEdge(const Node& tail, const Node& head) const { |
---|
182 | return Edge(graph->addEdge(tail, head)); } |
---|
183 | |
---|
184 | void erase(const Node& i) const { graph->erase(i); } |
---|
185 | void erase(const Edge& i) const { graph->erase(i); } |
---|
186 | |
---|
187 | void clear() const { graph->clear(); } |
---|
188 | |
---|
189 | template<typename T> class NodeMap : public Graph::template NodeMap<T> { |
---|
190 | typedef typename Graph::template NodeMap<T> Parent; |
---|
191 | public: |
---|
192 | NodeMap(const GraphWrapper<Graph>& _G) : Parent(*(_G.graph)) { } |
---|
193 | NodeMap(const GraphWrapper<Graph>& _G, T a) : Parent(*(_G.graph), a) { } |
---|
194 | }; |
---|
195 | |
---|
196 | template<typename T> class EdgeMap : public Graph::template EdgeMap<T> { |
---|
197 | typedef typename Graph::template EdgeMap<T> Parent; |
---|
198 | public: |
---|
199 | EdgeMap(const GraphWrapper<Graph>& _G) : Parent(*(_G.graph)) { } |
---|
200 | EdgeMap(const GraphWrapper<Graph>& _G, T a) : Parent(*(_G.graph), a) { } |
---|
201 | }; |
---|
202 | }; |
---|
203 | |
---|
204 | /// A graph wrapper which reverses the orientation of the edges. |
---|
205 | |
---|
206 | /// A graph wrapper which reverses the orientation of the edges. |
---|
207 | template<typename Graph> |
---|
208 | class RevGraphWrapper : public GraphWrapper<Graph> { |
---|
209 | public: |
---|
210 | |
---|
211 | RevGraphWrapper(Graph& _graph) : GraphWrapper<Graph>(_graph) { } |
---|
212 | |
---|
213 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
214 | typedef typename GraphWrapper<Graph>::Edge Edge; |
---|
215 | //If Graph::OutEdgeIt is not defined |
---|
216 | //and we do not want to use RevGraphWrapper::InEdgeIt, |
---|
217 | //the typdef techinque does not work. |
---|
218 | //Unfortunately all the typedefs are instantiated in templates. |
---|
219 | //typedef typename GraphWrapper<Graph>::OutEdgeIt InEdgeIt; |
---|
220 | //typedef typename GraphWrapper<Graph>::InEdgeIt OutEdgeIt; |
---|
221 | |
---|
222 | class OutEdgeIt { |
---|
223 | friend class GraphWrapper<Graph>; |
---|
224 | friend class RevGraphWrapper<Graph>; |
---|
225 | typename Graph::InEdgeIt e; |
---|
226 | public: |
---|
227 | OutEdgeIt() { } |
---|
228 | OutEdgeIt(const typename Graph::InEdgeIt& _e) : e(_e) { } |
---|
229 | OutEdgeIt(const Invalid& i) : e(i) { } |
---|
230 | OutEdgeIt(const RevGraphWrapper<Graph>& _G, const Node& _n) : |
---|
231 | e(*(_G.graph), typename Graph::Node(_n)) { } |
---|
232 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
233 | }; |
---|
234 | class InEdgeIt { |
---|
235 | friend class GraphWrapper<Graph>; |
---|
236 | friend class RevGraphWrapper<Graph>; |
---|
237 | typename Graph::OutEdgeIt e; |
---|
238 | public: |
---|
239 | InEdgeIt() { } |
---|
240 | InEdgeIt(const typename Graph::OutEdgeIt& _e) : e(_e) { } |
---|
241 | InEdgeIt(const Invalid& i) : e(i) { } |
---|
242 | InEdgeIt(const RevGraphWrapper<Graph>& _G, const Node& _n) : |
---|
243 | e(*(_G.graph), typename Graph::Node(_n)) { } |
---|
244 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
245 | }; |
---|
246 | |
---|
247 | using GraphWrapper<Graph>::first; |
---|
248 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
249 | i=OutEdgeIt(*this, p); return i; |
---|
250 | } |
---|
251 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
252 | i=InEdgeIt(*this, p); return i; |
---|
253 | } |
---|
254 | |
---|
255 | using GraphWrapper<Graph>::next; |
---|
256 | OutEdgeIt& next(OutEdgeIt& i) const { this->graph->next(i.e); return i; } |
---|
257 | InEdgeIt& next(InEdgeIt& i) const { this->graph->next(i.e); return i; } |
---|
258 | |
---|
259 | Node aNode(const OutEdgeIt& e) const { |
---|
260 | return Node(this->graph->aNode(e.e)); } |
---|
261 | Node aNode(const InEdgeIt& e) const { |
---|
262 | return Node(this->graph->aNode(e.e)); } |
---|
263 | Node bNode(const OutEdgeIt& e) const { |
---|
264 | return Node(this->graph->bNode(e.e)); } |
---|
265 | Node bNode(const InEdgeIt& e) const { |
---|
266 | return Node(this->graph->bNode(e.e)); } |
---|
267 | |
---|
268 | Node tail(const Edge& e) const { |
---|
269 | return GraphWrapper<Graph>::head(e); } |
---|
270 | Node head(const Edge& e) const { |
---|
271 | return GraphWrapper<Graph>::tail(e); } |
---|
272 | |
---|
273 | }; |
---|
274 | |
---|
275 | /// Wrapper for hiding nodes and edges from a graph. |
---|
276 | |
---|
277 | /// This wrapper shows a graph with filtered node-set and |
---|
278 | /// edge-set. The quick brown fox iterator jumps over |
---|
279 | /// the lazy dog nodes or edges if the values for them are false |
---|
280 | /// in the bool maps. |
---|
281 | template<typename Graph, typename NodeFilterMap, |
---|
282 | typename EdgeFilterMap> |
---|
283 | class SubGraphWrapper : public GraphWrapper<Graph> { |
---|
284 | protected: |
---|
285 | NodeFilterMap* node_filter_map; |
---|
286 | EdgeFilterMap* edge_filter_map; |
---|
287 | public: |
---|
288 | |
---|
289 | SubGraphWrapper(Graph& _graph, NodeFilterMap& _node_filter_map, |
---|
290 | EdgeFilterMap& _edge_filter_map) : |
---|
291 | GraphWrapper<Graph>(_graph), node_filter_map(&_node_filter_map), |
---|
292 | edge_filter_map(&_edge_filter_map) { } |
---|
293 | |
---|
294 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
295 | class NodeIt { |
---|
296 | friend class GraphWrapper<Graph>; |
---|
297 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
---|
298 | typename Graph::NodeIt n; |
---|
299 | public: |
---|
300 | NodeIt() { } |
---|
301 | NodeIt(const typename Graph::NodeIt& _n) : n(_n) { } |
---|
302 | NodeIt(const Invalid& i) : n(i) { } |
---|
303 | NodeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _G) : |
---|
304 | n(*(_G.graph)) { |
---|
305 | while (_G.graph->valid(n) && !(*(_G.node_filter_map))[n]) |
---|
306 | _G.graph->next(n); |
---|
307 | } |
---|
308 | operator Node() const { return Node(typename Graph::Node(n)); } |
---|
309 | }; |
---|
310 | typedef typename GraphWrapper<Graph>::Edge Edge; |
---|
311 | class OutEdgeIt { |
---|
312 | friend class GraphWrapper<Graph>; |
---|
313 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
---|
314 | typename Graph::OutEdgeIt e; |
---|
315 | public: |
---|
316 | OutEdgeIt() { } |
---|
317 | OutEdgeIt(const typename Graph::OutEdgeIt& _e) : e(_e) { } |
---|
318 | OutEdgeIt(const Invalid& i) : e(i) { } |
---|
319 | OutEdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _G, |
---|
320 | const Node& _n) : |
---|
321 | e(*(_G.graph), typename Graph::Node(_n)) { |
---|
322 | while (_G.graph->valid(e) && !(*(_G.edge_filter_map))[e]) |
---|
323 | _G.graph->next(e); |
---|
324 | } |
---|
325 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
326 | }; |
---|
327 | class InEdgeIt { |
---|
328 | friend class GraphWrapper<Graph>; |
---|
329 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
---|
330 | typename Graph::InEdgeIt e; |
---|
331 | public: |
---|
332 | InEdgeIt() { } |
---|
333 | InEdgeIt(const typename Graph::InEdgeIt& _e) : e(_e) { } |
---|
334 | InEdgeIt(const Invalid& i) : e(i) { } |
---|
335 | InEdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _G, |
---|
336 | const Node& _n) : |
---|
337 | e(*(_G.graph), typename Graph::Node(_n)) { |
---|
338 | while (_G.graph->valid(e) && !(*(_G.edge_filter_map))[e]) |
---|
339 | _G.graph->next(e); |
---|
340 | } |
---|
341 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
342 | }; |
---|
343 | //typedef typename Graph::SymEdgeIt SymEdgeIt; |
---|
344 | class EdgeIt { |
---|
345 | friend class GraphWrapper<Graph>; |
---|
346 | friend class SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>; |
---|
347 | typename Graph::EdgeIt e; |
---|
348 | public: |
---|
349 | EdgeIt() { } |
---|
350 | EdgeIt(const typename Graph::EdgeIt& _e) : e(_e) { } |
---|
351 | EdgeIt(const Invalid& i) : e(i) { } |
---|
352 | EdgeIt(const SubGraphWrapper<Graph, NodeFilterMap, EdgeFilterMap>& _G) : |
---|
353 | e(*(_G.graph)) { |
---|
354 | while (_G.graph->valid(e) && !(*(_G.edge_filter_map))[e]) |
---|
355 | _G.graph->next(e); |
---|
356 | } |
---|
357 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
358 | }; |
---|
359 | |
---|
360 | NodeIt& first(NodeIt& i) const { |
---|
361 | i=NodeIt(*this); return i; |
---|
362 | } |
---|
363 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
364 | i=OutEdgeIt(*this, p); return i; |
---|
365 | } |
---|
366 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
367 | i=InEdgeIt(*this, p); return i; |
---|
368 | } |
---|
369 | EdgeIt& first(EdgeIt& i) const { |
---|
370 | i=EdgeIt(*this); return i; |
---|
371 | } |
---|
372 | |
---|
373 | NodeIt& next(NodeIt& i) const { |
---|
374 | this->graph->next(i.n); |
---|
375 | while (this->graph->valid(i) && !(*node_filter_map)[i.n]) { |
---|
376 | this->graph->next(i.n); } |
---|
377 | return i; |
---|
378 | } |
---|
379 | OutEdgeIt& next(OutEdgeIt& i) const { |
---|
380 | this->graph->next(i.e); |
---|
381 | while (this->graph->valid(i) && !(*edge_filter_map)[i.e]) { |
---|
382 | this->graph->next(i.e); } |
---|
383 | return i; |
---|
384 | } |
---|
385 | InEdgeIt& next(InEdgeIt& i) const { |
---|
386 | this->graph->next(i.e); |
---|
387 | while (this->graph->valid(i) && !(*edge_filter_map)[i.e]) { |
---|
388 | this->graph->next(i.e); } |
---|
389 | return i; |
---|
390 | } |
---|
391 | EdgeIt& next(EdgeIt& i) const { |
---|
392 | this->graph->next(i.e); |
---|
393 | while (this->graph->valid(i) && !(*edge_filter_map)[i.e]) { |
---|
394 | this->graph->next(i.e); } |
---|
395 | return i; |
---|
396 | } |
---|
397 | |
---|
398 | Node aNode(const OutEdgeIt& e) const { |
---|
399 | return Node(this->graph->aNode(e.e)); } |
---|
400 | Node aNode(const InEdgeIt& e) const { |
---|
401 | return Node(this->graph->aNode(e.e)); } |
---|
402 | Node bNode(const OutEdgeIt& e) const { |
---|
403 | return Node(this->graph->bNode(e.e)); } |
---|
404 | Node bNode(const InEdgeIt& e) const { |
---|
405 | return Node(this->graph->bNode(e.e)); } |
---|
406 | |
---|
407 | ///\todo |
---|
408 | ///Some doki, please. |
---|
409 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
---|
410 | ///\todo |
---|
411 | ///Some doki, please. |
---|
412 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
---|
413 | |
---|
414 | ///\todo |
---|
415 | ///Some doki, please. |
---|
416 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
---|
417 | ///\todo |
---|
418 | ///Some doki, please. |
---|
419 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
---|
420 | |
---|
421 | ///\todo |
---|
422 | ///Some doki, please. |
---|
423 | bool hidden(const Node& n) const { return (*node_filter_map)[n]; } |
---|
424 | ///\todo |
---|
425 | ///Some doki, please. |
---|
426 | bool hidden(const Edge& e) const { return (*edge_filter_map)[e]; } |
---|
427 | }; |
---|
428 | |
---|
429 | /// A wrapper for forgetting the orientation of a graph. |
---|
430 | |
---|
431 | /// A wrapper for getting an undirected graph by forgetting |
---|
432 | /// the orientation of a directed one. |
---|
433 | template<typename Graph> |
---|
434 | class UndirGraphWrapper : public GraphWrapper<Graph> { |
---|
435 | public: |
---|
436 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
437 | typedef typename GraphWrapper<Graph>::NodeIt NodeIt; |
---|
438 | typedef typename GraphWrapper<Graph>::Edge Edge; |
---|
439 | typedef typename GraphWrapper<Graph>::EdgeIt EdgeIt; |
---|
440 | |
---|
441 | UndirGraphWrapper(Graph& _graph) : GraphWrapper<Graph>(_graph) { } |
---|
442 | |
---|
443 | class OutEdgeIt { |
---|
444 | friend class UndirGraphWrapper<Graph>; |
---|
445 | bool out_or_in; //true iff out |
---|
446 | typename Graph::OutEdgeIt out; |
---|
447 | typename Graph::InEdgeIt in; |
---|
448 | public: |
---|
449 | OutEdgeIt() { } |
---|
450 | OutEdgeIt(const Invalid& i) : Edge(i) { } |
---|
451 | OutEdgeIt(const UndirGraphWrapper<Graph>& _G, const Node& _n) { |
---|
452 | out_or_in=true; _G.graph->first(out, _n); |
---|
453 | if (!(_G.graph->valid(out))) { out_or_in=false; _G.graph->first(in, _n); } |
---|
454 | } |
---|
455 | operator Edge() const { |
---|
456 | if (out_or_in) return Edge(out); else return Edge(in); |
---|
457 | } |
---|
458 | }; |
---|
459 | |
---|
460 | //FIXME InEdgeIt |
---|
461 | typedef OutEdgeIt InEdgeIt; |
---|
462 | |
---|
463 | using GraphWrapper<Graph>::first; |
---|
464 | // NodeIt& first(NodeIt& i) const { |
---|
465 | // i=NodeIt(*this); return i; |
---|
466 | // } |
---|
467 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
468 | i=OutEdgeIt(*this, p); return i; |
---|
469 | } |
---|
470 | //FIXME |
---|
471 | // InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
472 | // i=InEdgeIt(*this, p); return i; |
---|
473 | // } |
---|
474 | // EdgeIt& first(EdgeIt& i) const { |
---|
475 | // i=EdgeIt(*this); return i; |
---|
476 | // } |
---|
477 | |
---|
478 | using GraphWrapper<Graph>::next; |
---|
479 | // NodeIt& next(NodeIt& n) const { |
---|
480 | // GraphWrapper<Graph>::next(n); |
---|
481 | // return n; |
---|
482 | // } |
---|
483 | OutEdgeIt& next(OutEdgeIt& e) const { |
---|
484 | if (e.out_or_in) { |
---|
485 | typename Graph::Node n=this->graph->tail(e.out); |
---|
486 | this->graph->next(e.out); |
---|
487 | if (!this->graph->valid(e.out)) { |
---|
488 | e.out_or_in=false; this->graph->first(e.in, n); } |
---|
489 | } else { |
---|
490 | this->graph->next(e.in); |
---|
491 | } |
---|
492 | return e; |
---|
493 | } |
---|
494 | //FIXME InEdgeIt |
---|
495 | // EdgeIt& next(EdgeIt& e) const { |
---|
496 | // GraphWrapper<Graph>::next(n); |
---|
497 | // // graph->next(e.e); |
---|
498 | // return e; |
---|
499 | // } |
---|
500 | |
---|
501 | Node aNode(const OutEdgeIt& e) const { |
---|
502 | if (e.out_or_in) return this->graph->tail(e); else |
---|
503 | return this->graph->head(e); } |
---|
504 | Node bNode(const OutEdgeIt& e) const { |
---|
505 | if (e.out_or_in) return this->graph->head(e); else |
---|
506 | return this->graph->tail(e); } |
---|
507 | }; |
---|
508 | |
---|
509 | /// A wrapper for composing the residual graph for directed flow and circulation problems. |
---|
510 | |
---|
511 | /// A wrapper for composing the residual graph for directed flow and circulation problems. |
---|
512 | template<typename Graph, typename Number, |
---|
513 | typename CapacityMap, typename FlowMap> |
---|
514 | class ResGraphWrapper : public GraphWrapper<Graph> { |
---|
515 | protected: |
---|
516 | const CapacityMap* capacity; |
---|
517 | FlowMap* flow; |
---|
518 | public: |
---|
519 | |
---|
520 | ResGraphWrapper(Graph& _graph, const CapacityMap& _capacity, |
---|
521 | FlowMap& _flow) : |
---|
522 | GraphWrapper<Graph>(_graph), capacity(&_capacity), flow(&_flow) { } |
---|
523 | |
---|
524 | class Edge; |
---|
525 | class OutEdgeIt; |
---|
526 | friend class Edge; |
---|
527 | friend class OutEdgeIt; |
---|
528 | |
---|
529 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
530 | typedef typename GraphWrapper<Graph>::NodeIt NodeIt; |
---|
531 | class Edge : public Graph::Edge { |
---|
532 | friend class ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>; |
---|
533 | protected: |
---|
534 | bool forward; //true, iff forward |
---|
535 | // typename Graph::Edge e; |
---|
536 | public: |
---|
537 | Edge() { } |
---|
538 | Edge(const typename Graph::Edge& _e, bool _forward) : |
---|
539 | Graph::Edge(_e), forward(_forward) { } |
---|
540 | Edge(const Invalid& i) : Graph::Edge(i), forward(false) { } |
---|
541 | //the unique invalid iterator |
---|
542 | friend bool operator==(const Edge& u, const Edge& v) { |
---|
543 | return (v.forward==u.forward && |
---|
544 | static_cast<typename Graph::Edge>(u)== |
---|
545 | static_cast<typename Graph::Edge>(v)); |
---|
546 | } |
---|
547 | friend bool operator!=(const Edge& u, const Edge& v) { |
---|
548 | return (v.forward!=u.forward || |
---|
549 | static_cast<typename Graph::Edge>(u)!= |
---|
550 | static_cast<typename Graph::Edge>(v)); |
---|
551 | } |
---|
552 | }; |
---|
553 | |
---|
554 | class OutEdgeIt { |
---|
555 | friend class ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>; |
---|
556 | protected: |
---|
557 | typename Graph::OutEdgeIt out; |
---|
558 | typename Graph::InEdgeIt in; |
---|
559 | bool forward; |
---|
560 | public: |
---|
561 | OutEdgeIt() { } |
---|
562 | //FIXME |
---|
563 | // OutEdgeIt(const Edge& e) : Edge(e) { } |
---|
564 | OutEdgeIt(const Invalid& i) : out(i), in(i), forward(false) { } |
---|
565 | //the unique invalid iterator |
---|
566 | OutEdgeIt(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& resG, Node v) { |
---|
567 | forward=true; |
---|
568 | resG.graph->first(out, v); |
---|
569 | while( resG.graph->valid(out) && !(resG.resCap(*this)>0) ) { resG.graph->next(out); } |
---|
570 | if (!resG.graph->valid(out)) { |
---|
571 | forward=false; |
---|
572 | resG.graph->first(in, v); |
---|
573 | while( resG.graph->valid(in) && !(resG.resCap(*this)>0) ) { resG.graph->next(in); } |
---|
574 | } |
---|
575 | } |
---|
576 | operator Edge() const { |
---|
577 | // Edge e; |
---|
578 | // e.forward=this->forward; |
---|
579 | // if (this->forward) e=out; else e=in; |
---|
580 | // return e; |
---|
581 | if (this->forward) |
---|
582 | return Edge(out, this->forward); |
---|
583 | else |
---|
584 | return Edge(in, this->forward); |
---|
585 | } |
---|
586 | }; |
---|
587 | |
---|
588 | class InEdgeIt { |
---|
589 | friend class ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>; |
---|
590 | protected: |
---|
591 | typename Graph::OutEdgeIt out; |
---|
592 | typename Graph::InEdgeIt in; |
---|
593 | bool forward; |
---|
594 | public: |
---|
595 | InEdgeIt() { } |
---|
596 | //FIXME |
---|
597 | // OutEdgeIt(const Edge& e) : Edge(e) { } |
---|
598 | InEdgeIt(const Invalid& i) : out(i), in(i), forward(false) { } |
---|
599 | //the unique invalid iterator |
---|
600 | InEdgeIt(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& resG, Node v) { |
---|
601 | forward=true; |
---|
602 | resG.graph->first(in, v); |
---|
603 | while( resG.graph->valid(in) && !(resG.resCap(*this)>0) ) { resG.graph->next(in); } |
---|
604 | if (!resG.graph->valid(in)) { |
---|
605 | forward=false; |
---|
606 | resG.graph->first(out, v); |
---|
607 | while( resG.graph->valid(out) && !(resG.resCap(*this)>0) ) { resG.graph->next(out); } |
---|
608 | } |
---|
609 | } |
---|
610 | operator Edge() const { |
---|
611 | // Edge e; |
---|
612 | // e.forward=this->forward; |
---|
613 | // if (this->forward) e=out; else e=in; |
---|
614 | // return e; |
---|
615 | if (this->forward) |
---|
616 | return Edge(in, this->forward); |
---|
617 | else |
---|
618 | return Edge(out, this->forward); |
---|
619 | } |
---|
620 | }; |
---|
621 | |
---|
622 | class EdgeIt { |
---|
623 | friend class ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>; |
---|
624 | protected: |
---|
625 | typename Graph::EdgeIt e; |
---|
626 | bool forward; |
---|
627 | public: |
---|
628 | EdgeIt() { } |
---|
629 | EdgeIt(const Invalid& i) : e(i), forward(false) { } |
---|
630 | EdgeIt(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& resG) { |
---|
631 | forward=true; |
---|
632 | resG.graph->first(e); |
---|
633 | while (resG.graph->valid(e) && !(resG.resCap(*this)>0)) resG.graph->next(e); |
---|
634 | if (!resG.graph->valid(e)) { |
---|
635 | forward=false; |
---|
636 | resG.graph->first(e); |
---|
637 | while (resG.graph->valid(e) && !(resG.resCap(*this)>0)) resG.graph->next(e); |
---|
638 | } |
---|
639 | } |
---|
640 | operator Edge() const { |
---|
641 | return Edge(e, this->forward); |
---|
642 | } |
---|
643 | }; |
---|
644 | |
---|
645 | using GraphWrapper<Graph>::first; |
---|
646 | // NodeIt& first(NodeIt& i) const { |
---|
647 | // i=NodeIt(*this); return i; |
---|
648 | // } |
---|
649 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
650 | i=OutEdgeIt(*this, p); return i; |
---|
651 | } |
---|
652 | // FIXME not tested |
---|
653 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
654 | i=InEdgeIt(*this, p); return i; |
---|
655 | } |
---|
656 | EdgeIt& first(EdgeIt& i) const { |
---|
657 | i=EdgeIt(*this); return i; |
---|
658 | } |
---|
659 | |
---|
660 | using GraphWrapper<Graph>::next; |
---|
661 | // NodeIt& next(NodeIt& n) const { GraphWrapper<Graph>::next(n); return n; } |
---|
662 | OutEdgeIt& next(OutEdgeIt& e) const { |
---|
663 | if (e.forward) { |
---|
664 | Node v=this->graph->aNode(e.out); |
---|
665 | this->graph->next(e.out); |
---|
666 | while( this->graph->valid(e.out) && !(resCap(e)>0) ) { |
---|
667 | this->graph->next(e.out); } |
---|
668 | if (!this->graph->valid(e.out)) { |
---|
669 | e.forward=false; |
---|
670 | this->graph->first(e.in, v); |
---|
671 | while( this->graph->valid(e.in) && !(resCap(e)>0) ) { |
---|
672 | this->graph->next(e.in); } |
---|
673 | } |
---|
674 | } else { |
---|
675 | this->graph->next(e.in); |
---|
676 | while( this->graph->valid(e.in) && !(resCap(e)>0) ) { |
---|
677 | this->graph->next(e.in); } |
---|
678 | } |
---|
679 | return e; |
---|
680 | } |
---|
681 | // FIXME Not tested |
---|
682 | InEdgeIt& next(InEdgeIt& e) const { |
---|
683 | if (e.forward) { |
---|
684 | Node v=this->graph->aNode(e.in); |
---|
685 | this->graph->next(e.in); |
---|
686 | while( this->graph->valid(e.in) && !(resCap(e)>0) ) { |
---|
687 | this->graph->next(e.in); } |
---|
688 | if (!this->graph->valid(e.in)) { |
---|
689 | e.forward=false; |
---|
690 | this->graph->first(e.out, v); |
---|
691 | while( this->graph->valid(e.out) && !(resCap(e)>0) ) { |
---|
692 | this->graph->next(e.out); } |
---|
693 | } |
---|
694 | } else { |
---|
695 | this->graph->next(e.out); |
---|
696 | while( this->graph->valid(e.out) && !(resCap(e)>0) ) { |
---|
697 | this->graph->next(e.out); } |
---|
698 | } |
---|
699 | return e; |
---|
700 | } |
---|
701 | EdgeIt& next(EdgeIt& e) const { |
---|
702 | if (e.forward) { |
---|
703 | this->graph->next(e.e); |
---|
704 | while( this->graph->valid(e.e) && !(resCap(e)>0) ) { |
---|
705 | this->graph->next(e.e); } |
---|
706 | if (!this->graph->valid(e.e)) { |
---|
707 | e.forward=false; |
---|
708 | this->graph->first(e.e); |
---|
709 | while( this->graph->valid(e.e) && !(resCap(e)>0) ) { |
---|
710 | this->graph->next(e.e); } |
---|
711 | } |
---|
712 | } else { |
---|
713 | this->graph->next(e.e); |
---|
714 | while( this->graph->valid(e.e) && !(resCap(e)>0) ) { |
---|
715 | this->graph->next(e.e); } |
---|
716 | } |
---|
717 | return e; |
---|
718 | } |
---|
719 | |
---|
720 | Node tail(Edge e) const { |
---|
721 | return ((e.forward) ? this->graph->tail(e) : this->graph->head(e)); } |
---|
722 | Node head(Edge e) const { |
---|
723 | return ((e.forward) ? this->graph->head(e) : this->graph->tail(e)); } |
---|
724 | |
---|
725 | Node aNode(OutEdgeIt e) const { |
---|
726 | return ((e.forward) ? this->graph->aNode(e.out) : |
---|
727 | this->graph->aNode(e.in)); } |
---|
728 | Node bNode(OutEdgeIt e) const { |
---|
729 | return ((e.forward) ? this->graph->bNode(e.out) : |
---|
730 | this->graph->bNode(e.in)); } |
---|
731 | |
---|
732 | Node aNode(InEdgeIt e) const { |
---|
733 | return ((e.forward) ? this->graph->aNode(e.in) : |
---|
734 | this->graph->aNode(e.out)); } |
---|
735 | Node bNode(InEdgeIt e) const { |
---|
736 | return ((e.forward) ? this->graph->bNode(e.in) : |
---|
737 | this->graph->bNode(e.out)); } |
---|
738 | |
---|
739 | // int nodeNum() const { return graph->nodeNum(); } |
---|
740 | //FIXME |
---|
741 | void edgeNum() const { } |
---|
742 | //int edgeNum() const { return graph->edgeNum(); } |
---|
743 | |
---|
744 | |
---|
745 | // int id(Node v) const { return graph->id(v); } |
---|
746 | |
---|
747 | bool valid(Node n) const { return GraphWrapper<Graph>::valid(n); } |
---|
748 | bool valid(Edge e) const { |
---|
749 | return this->graph->valid(e); |
---|
750 | //return e.forward ? graph->valid(e.out) : graph->valid(e.in); |
---|
751 | } |
---|
752 | |
---|
753 | void augment(const Edge& e, Number a) const { |
---|
754 | if (e.forward) |
---|
755 | // flow->set(e.out, flow->get(e.out)+a); |
---|
756 | flow->set(e, (*flow)[e]+a); |
---|
757 | else |
---|
758 | // flow->set(e.in, flow->get(e.in)-a); |
---|
759 | flow->set(e, (*flow)[e]-a); |
---|
760 | } |
---|
761 | |
---|
762 | Number resCap(const Edge& e) const { |
---|
763 | if (e.forward) |
---|
764 | // return (capacity->get(e.out)-flow->get(e.out)); |
---|
765 | return ((*capacity)[e]-(*flow)[e]); |
---|
766 | else |
---|
767 | // return (flow->get(e.in)); |
---|
768 | return ((*flow)[e]); |
---|
769 | } |
---|
770 | |
---|
771 | // Number resCap(typename Graph::OutEdgeIt out) const { |
---|
772 | // // return (capacity->get(out)-flow->get(out)); |
---|
773 | // return ((*capacity)[out]-(*flow)[out]); |
---|
774 | // } |
---|
775 | |
---|
776 | // Number resCap(typename Graph::InEdgeIt in) const { |
---|
777 | // // return (flow->get(in)); |
---|
778 | // return ((*flow)[in]); |
---|
779 | // } |
---|
780 | |
---|
781 | template <typename T> |
---|
782 | class EdgeMap { |
---|
783 | typename Graph::template EdgeMap<T> forward_map, backward_map; |
---|
784 | public: |
---|
785 | EdgeMap(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& _G) : forward_map(*(_G.graph)), backward_map(*(_G.graph)) { } |
---|
786 | EdgeMap(const ResGraphWrapper<Graph, Number, CapacityMap, FlowMap>& _G, T a) : forward_map(*(_G.graph), a), backward_map(*(_G.graph), a) { } |
---|
787 | void set(Edge e, T a) { |
---|
788 | if (e.forward) |
---|
789 | forward_map.set(e.out, a); |
---|
790 | else |
---|
791 | backward_map.set(e.in, a); |
---|
792 | } |
---|
793 | T operator[](Edge e) const { |
---|
794 | if (e.forward) |
---|
795 | return forward_map[e.out]; |
---|
796 | else |
---|
797 | return backward_map[e.in]; |
---|
798 | } |
---|
799 | // T get(Edge e) const { |
---|
800 | // if (e.out_or_in) |
---|
801 | // return forward_map.get(e.out); |
---|
802 | // else |
---|
803 | // return backward_map.get(e.in); |
---|
804 | // } |
---|
805 | }; |
---|
806 | }; |
---|
807 | |
---|
808 | /// ErasingFirstGraphWrapper for blocking flows. |
---|
809 | |
---|
810 | /// ErasingFirstGraphWrapper for blocking flows. |
---|
811 | template<typename Graph, typename FirstOutEdgesMap> |
---|
812 | class ErasingFirstGraphWrapper : public GraphWrapper<Graph> { |
---|
813 | protected: |
---|
814 | FirstOutEdgesMap* first_out_edges; |
---|
815 | public: |
---|
816 | ErasingFirstGraphWrapper(Graph& _graph, |
---|
817 | FirstOutEdgesMap& _first_out_edges) : |
---|
818 | GraphWrapper<Graph>(_graph), first_out_edges(&_first_out_edges) { } |
---|
819 | |
---|
820 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
821 | // class NodeIt { |
---|
822 | // friend class GraphWrapper<Graph>; |
---|
823 | // friend class ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>; |
---|
824 | // typename Graph::NodeIt n; |
---|
825 | // public: |
---|
826 | // NodeIt() { } |
---|
827 | // NodeIt(const typename Graph::NodeIt& _n) : n(_n) { } |
---|
828 | // NodeIt(const Invalid& i) : n(i) { } |
---|
829 | // NodeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _G) : |
---|
830 | // n(*(_G.graph)) { } |
---|
831 | // operator Node() const { return Node(typename Graph::Node(n)); } |
---|
832 | // }; |
---|
833 | typedef typename GraphWrapper<Graph>::Edge Edge; |
---|
834 | class OutEdgeIt { |
---|
835 | friend class GraphWrapper<Graph>; |
---|
836 | friend class ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>; |
---|
837 | // typedef typename Graph::OutEdgeIt GraphOutEdgeIt; |
---|
838 | typename Graph::OutEdgeIt e; |
---|
839 | public: |
---|
840 | OutEdgeIt() { } |
---|
841 | OutEdgeIt(const typename Graph::OutEdgeIt& _e) : e(_e) { } |
---|
842 | OutEdgeIt(const Invalid& i) : e(i) { } |
---|
843 | OutEdgeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _G, |
---|
844 | const Node& _n) : |
---|
845 | e((*_G.first_out_edges)[_n]) { } |
---|
846 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
847 | }; |
---|
848 | class InEdgeIt { |
---|
849 | friend class GraphWrapper<Graph>; |
---|
850 | friend class ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>; |
---|
851 | // typedef typename Graph::InEdgeIt GraphInEdgeIt; |
---|
852 | typename Graph::InEdgeIt e; |
---|
853 | public: |
---|
854 | InEdgeIt() { } |
---|
855 | InEdgeIt(const typename Graph::InEdgeIt& _e) : e(_e) { } |
---|
856 | InEdgeIt(const Invalid& i) : e(i) { } |
---|
857 | InEdgeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _G, |
---|
858 | const Node& _n) : |
---|
859 | e(*(_G.graph), typename Graph::Node(_n)) { } |
---|
860 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
861 | }; |
---|
862 | //typedef typename Graph::SymEdgeIt SymEdgeIt; |
---|
863 | class EdgeIt { |
---|
864 | friend class GraphWrapper<Graph>; |
---|
865 | friend class ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>; |
---|
866 | // typedef typename Graph::EdgeIt GraphEdgeIt; |
---|
867 | typename Graph::EdgeIt e; |
---|
868 | public: |
---|
869 | EdgeIt() { } |
---|
870 | EdgeIt(const typename Graph::EdgeIt& _e) : e(_e) { } |
---|
871 | EdgeIt(const Invalid& i) : e(i) { } |
---|
872 | EdgeIt(const ErasingFirstGraphWrapper<Graph, FirstOutEdgesMap>& _G) : |
---|
873 | e(*(_G.graph)) { } |
---|
874 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
875 | }; |
---|
876 | |
---|
877 | using GraphWrapper<Graph>::first; |
---|
878 | // NodeIt& first(NodeIt& i) const { |
---|
879 | // i=NodeIt(*this); return i; |
---|
880 | // } |
---|
881 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
882 | i=OutEdgeIt(*this, p); return i; |
---|
883 | } |
---|
884 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
885 | i=InEdgeIt(*this, p); return i; |
---|
886 | } |
---|
887 | EdgeIt& first(EdgeIt& i) const { |
---|
888 | i=EdgeIt(*this); return i; |
---|
889 | } |
---|
890 | |
---|
891 | using GraphWrapper<Graph>::next; |
---|
892 | // NodeIt& next(NodeIt& i) const { graph->next(i.n); return i; } |
---|
893 | OutEdgeIt& next(OutEdgeIt& i) const { this->graph->next(i.e); return i; } |
---|
894 | InEdgeIt& next(InEdgeIt& i) const { this->graph->next(i.e); return i; } |
---|
895 | EdgeIt& next(EdgeIt& i) const { this->graph->next(i.e); return i; } |
---|
896 | |
---|
897 | Node aNode(const OutEdgeIt& e) const { |
---|
898 | return Node(this->graph->aNode(e.e)); } |
---|
899 | Node aNode(const InEdgeIt& e) const { |
---|
900 | return Node(this->graph->aNode(e.e)); } |
---|
901 | Node bNode(const OutEdgeIt& e) const { |
---|
902 | return Node(this->graph->bNode(e.e)); } |
---|
903 | Node bNode(const InEdgeIt& e) const { |
---|
904 | return Node(this->graph->bNode(e.e)); } |
---|
905 | |
---|
906 | void erase(const OutEdgeIt& e) const { |
---|
907 | OutEdgeIt f=e; |
---|
908 | this->next(f); |
---|
909 | first_out_edges->set(this->tail(e), f.e); |
---|
910 | } |
---|
911 | }; |
---|
912 | |
---|
913 | /// A wrapper for composing a bipartite graph. |
---|
914 | /// \c _graph have to be a reference to a graph of type \c Graph |
---|
915 | /// and \c _s_false_t_true_map is an \c IterableBoolMap |
---|
916 | /// reference containing the elements for the |
---|
917 | /// color classes S and T. \c _graph is to be referred to an undirected |
---|
918 | /// graph or a directed graph with edges oriented from S to T. |
---|
919 | template<typename Graph> |
---|
920 | class BipartiteGraphWrapper : public GraphWrapper<Graph> { |
---|
921 | typedef IterableBoolMap< typename Graph::template NodeMap<int> > |
---|
922 | SFalseTTrueMap; |
---|
923 | SFalseTTrueMap* s_false_t_true_map; |
---|
924 | |
---|
925 | public: |
---|
926 | static const bool S_CLASS=false; |
---|
927 | static const bool T_CLASS=true; |
---|
928 | |
---|
929 | BipartiteGraphWrapper(Graph& _graph, SFalseTTrueMap& _s_false_t_true_map) |
---|
930 | : GraphWrapper<Graph>(_graph), s_false_t_true_map(&_s_false_t_true_map) { |
---|
931 | } |
---|
932 | typedef typename GraphWrapper<Graph>::Node Node; |
---|
933 | //using GraphWrapper<Graph>::NodeIt; |
---|
934 | typedef typename GraphWrapper<Graph>::Edge Edge; |
---|
935 | //using GraphWrapper<Graph>::EdgeIt; |
---|
936 | class ClassNodeIt; |
---|
937 | friend class ClassNodeIt; |
---|
938 | class OutEdgeIt; |
---|
939 | friend class OutEdgeIt; |
---|
940 | class InEdgeIt; |
---|
941 | friend class InEdgeIt; |
---|
942 | class ClassNodeIt { |
---|
943 | friend class BipartiteGraphWrapper<Graph>; |
---|
944 | protected: |
---|
945 | Node n; |
---|
946 | public: |
---|
947 | ClassNodeIt() { } |
---|
948 | ClassNodeIt(const Invalid& i) : n(i) { } |
---|
949 | ClassNodeIt(const BipartiteGraphWrapper<Graph>& _G, bool _class) { |
---|
950 | _G.s_false_t_true_map->first(n, _class); |
---|
951 | } |
---|
952 | //FIXME needed in new concept, important here |
---|
953 | ClassNodeIt(const Node& _n) : n(_n) { } |
---|
954 | operator Node() const { return n; } |
---|
955 | }; |
---|
956 | // class SNodeIt { |
---|
957 | // Node n; |
---|
958 | // public: |
---|
959 | // SNodeIt() { } |
---|
960 | // SNodeIt(const Invalid& i) : n(i) { } |
---|
961 | // SNodeIt(const BipartiteGraphWrapper<Graph>& _G) { |
---|
962 | // _G.s_false_t_true_map->first(n, false); |
---|
963 | // } |
---|
964 | // operator Node() const { return n; } |
---|
965 | // }; |
---|
966 | // class TNodeIt { |
---|
967 | // Node n; |
---|
968 | // public: |
---|
969 | // TNodeIt() { } |
---|
970 | // TNodeIt(const Invalid& i) : n(i) { } |
---|
971 | // TNodeIt(const BipartiteGraphWrapper<Graph>& _G) { |
---|
972 | // _G.s_false_t_true_map->first(n, true); |
---|
973 | // } |
---|
974 | // operator Node() const { return n; } |
---|
975 | // }; |
---|
976 | class OutEdgeIt { |
---|
977 | friend class BipartiteGraphWrapper<Graph>; |
---|
978 | protected: |
---|
979 | typename Graph::OutEdgeIt e; |
---|
980 | public: |
---|
981 | OutEdgeIt() { } |
---|
982 | OutEdgeIt(const Invalid& i) : e(i) { } |
---|
983 | OutEdgeIt(const BipartiteGraphWrapper<Graph>& _G, const Node& _n) { |
---|
984 | if (!(*(_G.s_false_t_true_map))[_n]) |
---|
985 | e=typename Graph::OutEdgeIt(*(_G.graph), typename Graph::Node(_n)); |
---|
986 | else |
---|
987 | e=INVALID; |
---|
988 | } |
---|
989 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
990 | }; |
---|
991 | class InEdgeIt { |
---|
992 | friend class BipartiteGraphWrapper<Graph>; |
---|
993 | protected: |
---|
994 | typename Graph::InEdgeIt e; |
---|
995 | public: |
---|
996 | InEdgeIt() { } |
---|
997 | InEdgeIt(const Invalid& i) : e(i) { } |
---|
998 | InEdgeIt(const BipartiteGraphWrapper<Graph>& _G, const Node& _n) { |
---|
999 | if ((*(_G.s_false_t_true_map))[_n]) |
---|
1000 | e=typename Graph::InEdgeIt(*(_G.graph), typename Graph::Node(_n)); |
---|
1001 | else |
---|
1002 | e=INVALID; |
---|
1003 | } |
---|
1004 | operator Edge() const { return Edge(typename Graph::Edge(e)); } |
---|
1005 | }; |
---|
1006 | |
---|
1007 | using GraphWrapper<Graph>::first; |
---|
1008 | ClassNodeIt& first(ClassNodeIt& n, bool _class) const { |
---|
1009 | n=ClassNodeIt(*this, _class) ; return n; } |
---|
1010 | // SNodeIt& first(SNodeIt& n) const { n=SNodeIt(*this); return n; } |
---|
1011 | // TNodeIt& first(TNodeIt& n) const { n=TNodeIt(*this); return n; } |
---|
1012 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
1013 | i=OutEdgeIt(*this, p); return i; |
---|
1014 | } |
---|
1015 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
1016 | i=InEdgeIt(*this, p); return i; |
---|
1017 | } |
---|
1018 | |
---|
1019 | using GraphWrapper<Graph>::next; |
---|
1020 | ClassNodeIt& next(ClassNodeIt& n) const { |
---|
1021 | this->s_false_t_true_map->next(n.n); return n; |
---|
1022 | } |
---|
1023 | // SNodeIt& next(SNodeIt& n) const { |
---|
1024 | // this->s_false_t_true_map->next(n); return n; |
---|
1025 | // } |
---|
1026 | // TNodeIt& next(TNodeIt& n) const { |
---|
1027 | // this->s_false_t_true_map->next(n); return n; |
---|
1028 | // } |
---|
1029 | OutEdgeIt& next(OutEdgeIt& i) const { this->graph->next(i.e); return i; } |
---|
1030 | InEdgeIt& next(InEdgeIt& i) const { this->graph->next(i.e); return i; } |
---|
1031 | |
---|
1032 | Node tail(const Edge& e) { |
---|
1033 | if (!(*(this->s_false_t_true_map))[this->graph->tail(e)]) |
---|
1034 | return Node(this->graph->tail(e)); |
---|
1035 | else |
---|
1036 | return Node(this->graph->head(e)); |
---|
1037 | } |
---|
1038 | Node head(const Edge& e) { |
---|
1039 | if (!(*(this->s_false_t_true_map))[this->graph->tail(e)]) |
---|
1040 | return Node(this->graph->head(e)); |
---|
1041 | else |
---|
1042 | return Node(this->graph->tail(e)); |
---|
1043 | } |
---|
1044 | |
---|
1045 | Node aNode(const OutEdgeIt& e) const { |
---|
1046 | return Node(this->graph->aNode(e.e)); |
---|
1047 | } |
---|
1048 | Node aNode(const InEdgeIt& e) const { |
---|
1049 | return Node(this->graph->aNode(e.e)); |
---|
1050 | } |
---|
1051 | Node bNode(const OutEdgeIt& e) const { |
---|
1052 | return Node(this->graph->bNode(e.e)); |
---|
1053 | } |
---|
1054 | Node bNode(const InEdgeIt& e) const { |
---|
1055 | return Node(this->graph->bNode(e.e)); |
---|
1056 | } |
---|
1057 | |
---|
1058 | bool inSClass(const Node& n) const { |
---|
1059 | return !(*(this->s_false_t_true_map))[n]; |
---|
1060 | } |
---|
1061 | bool inTClass(const Node& n) const { |
---|
1062 | return (*(this->s_false_t_true_map))[n]; |
---|
1063 | } |
---|
1064 | }; |
---|
1065 | |
---|
1066 | |
---|
1067 | /// experimentral, do not try it. |
---|
1068 | /// It eats a bipartite graph, oriented from S to T. |
---|
1069 | /// Such one can be made e.g. by the above wrapper. |
---|
1070 | template<typename Graph> |
---|
1071 | class stGraphWrapper : public GraphWrapper<Graph> { |
---|
1072 | public: |
---|
1073 | class Node; |
---|
1074 | friend class Node; |
---|
1075 | //GN, int |
---|
1076 | //0 normalis, 1 s, 2, true, ez az iteralasi sorrend, |
---|
1077 | //es a vege a false azaz (invalid, 3) |
---|
1078 | class NodeIt; |
---|
1079 | friend class NodeIt; |
---|
1080 | //GNI, int |
---|
1081 | class Edge; |
---|
1082 | friend class Edge; |
---|
1083 | //GE, int, GN |
---|
1084 | //0 normalis, 1 s->vmi, 2 vmi->t, ez a sorrend, |
---|
1085 | //invalid: (invalid, 3, invalid) |
---|
1086 | class OutEdgeIt; |
---|
1087 | friend class OutEdgeIt; |
---|
1088 | //GO, int, GNI |
---|
1089 | //normalis pontbol (first, 0, invalid), ..., (invalid, 2, vmi), ... (invalid, 3, invalid) |
---|
1090 | //s-bol (invalid, 1, first), ... (invalid, 3, invalid) |
---|
1091 | //t-bol (invalid, 3, invalid) |
---|
1092 | class InEdgeIt; |
---|
1093 | friend class InEdgeIt; |
---|
1094 | //GI, int, GNI |
---|
1095 | //normalis pontbol (first, 0, invalid), ..., (invalid, 1, vmi), ... (invalid, 3, invalid) |
---|
1096 | //s-be (invalid, 3, invalid) |
---|
1097 | //t-be (invalid, 2, first), ... (invalid, 3, invalid) |
---|
1098 | class EdgeIt; |
---|
1099 | friend class EdgeIt; |
---|
1100 | //(first, 0, invalid) ... |
---|
1101 | //(invalid, 1, vmi) |
---|
1102 | //(invalid, 2, vmi) |
---|
1103 | //invalid, 3, invalid) |
---|
1104 | template <typename T> class NodeMap; |
---|
1105 | template <typename T> class EdgeMap; |
---|
1106 | |
---|
1107 | // template <typename T> friend class NodeMap; |
---|
1108 | // template <typename T> friend class EdgeMap; |
---|
1109 | |
---|
1110 | const Node S_NODE; |
---|
1111 | const Node T_NODE; |
---|
1112 | |
---|
1113 | static const bool S_CLASS=false; |
---|
1114 | static const bool T_CLASS=true; |
---|
1115 | |
---|
1116 | stGraphWrapper(Graph& _graph) : GraphWrapper<Graph>(_graph) , |
---|
1117 | S_NODE(INVALID, 1), |
---|
1118 | T_NODE(INVALID, 2) { } |
---|
1119 | |
---|
1120 | class Node : public Graph::Node { |
---|
1121 | protected: |
---|
1122 | friend class GraphWrapper<Graph>; |
---|
1123 | friend class stGraphWrapper<Graph>; |
---|
1124 | template <typename T> friend class NodeMap; |
---|
1125 | friend class Edge; |
---|
1126 | friend class OutEdgeIt; |
---|
1127 | friend class InEdgeIt; |
---|
1128 | friend class EdgeIt; |
---|
1129 | int spec; |
---|
1130 | public: |
---|
1131 | Node() { } |
---|
1132 | Node(const typename Graph::Node& _n, int _spec=0) : |
---|
1133 | Graph::Node(_n), spec(_spec) { } |
---|
1134 | Node(const Invalid& i) : Graph::Node(i), spec(3) { } |
---|
1135 | friend bool operator==(const Node& u, const Node& v) { |
---|
1136 | return (u.spec==v.spec && |
---|
1137 | static_cast<typename Graph::Node>(u)== |
---|
1138 | static_cast<typename Graph::Node>(v)); |
---|
1139 | } |
---|
1140 | friend bool operator!=(const Node& u, const Node& v) { |
---|
1141 | return (v.spec!=u.spec || |
---|
1142 | static_cast<typename Graph::Node>(u)!= |
---|
1143 | static_cast<typename Graph::Node>(v)); |
---|
1144 | } |
---|
1145 | int getSpec() const { return spec; } |
---|
1146 | }; |
---|
1147 | class NodeIt { |
---|
1148 | friend class GraphWrapper<Graph>; |
---|
1149 | friend class stGraphWrapper<Graph>; |
---|
1150 | typename Graph::NodeIt n; |
---|
1151 | int spec; |
---|
1152 | public: |
---|
1153 | NodeIt() { } |
---|
1154 | NodeIt(const typename Graph::NodeIt& _n, int _spec) : |
---|
1155 | n(_n), spec(_spec) { } |
---|
1156 | NodeIt(const Invalid& i) : n(i), spec(3) { } |
---|
1157 | NodeIt(const stGraphWrapper<Graph>& _G) : n(*(_G.graph)), spec(0) { |
---|
1158 | if (!_G->valid(n)) spec=1; |
---|
1159 | } |
---|
1160 | operator Node() const { return Node(n, spec); } |
---|
1161 | }; |
---|
1162 | class Edge : public Graph::Edge { |
---|
1163 | friend class GraphWrapper<Graph>; |
---|
1164 | friend class stGraphWrapper<Graph>; |
---|
1165 | template <typename T> friend class EdgeMap; |
---|
1166 | int spec; |
---|
1167 | typename Graph::Node n; |
---|
1168 | public: |
---|
1169 | Edge() { } |
---|
1170 | Edge(const typename Graph::Edge& _e, int _spec, |
---|
1171 | const typename Graph::Node& _n) : |
---|
1172 | Graph::Edge(_e), spec(_spec), n(_n) { |
---|
1173 | } |
---|
1174 | Edge(const Invalid& i) : Graph::Edge(i), spec(3), n(i) { } |
---|
1175 | friend bool operator==(const Edge& u, const Edge& v) { |
---|
1176 | return (u.spec==v.spec && |
---|
1177 | static_cast<typename Graph::Edge>(u)== |
---|
1178 | static_cast<typename Graph::Edge>(v) && |
---|
1179 | u.n==v.n); |
---|
1180 | } |
---|
1181 | friend bool operator!=(const Edge& u, const Edge& v) { |
---|
1182 | return (v.spec!=u.spec || |
---|
1183 | static_cast<typename Graph::Edge>(u)!= |
---|
1184 | static_cast<typename Graph::Edge>(v) || |
---|
1185 | u.n!=v.n); |
---|
1186 | } |
---|
1187 | int getSpec() const { return spec; } |
---|
1188 | }; |
---|
1189 | class OutEdgeIt { |
---|
1190 | friend class GraphWrapper<Graph>; |
---|
1191 | friend class stGraphWrapper<Graph>; |
---|
1192 | typename Graph::OutEdgeIt e; |
---|
1193 | int spec; |
---|
1194 | typename Graph::ClassNodeIt n; |
---|
1195 | public: |
---|
1196 | OutEdgeIt() { } |
---|
1197 | OutEdgeIt(const typename Graph::OutEdgeIt& _e, int _spec, |
---|
1198 | const typename Graph::ClassNodeIt& _n) : |
---|
1199 | e(_e), spec(_spec), n(_n) { |
---|
1200 | } |
---|
1201 | OutEdgeIt(const Invalid& i) : e(i), spec(3), n(i) { } |
---|
1202 | OutEdgeIt(const stGraphWrapper<Graph>& _G, const Node& _n) { |
---|
1203 | switch (_n.spec) { |
---|
1204 | case 0 : |
---|
1205 | if (_G.graph->inSClass(_n)) { //S, van normalis kiel |
---|
1206 | e=typename Graph::OutEdgeIt(*(_G.graph), |
---|
1207 | typename Graph::Node(_n)); |
---|
1208 | spec=0; |
---|
1209 | n=INVALID; |
---|
1210 | if (!_G.graph->valid(e)) spec=3; |
---|
1211 | } else { //T, specko kiel van |
---|
1212 | e=INVALID; |
---|
1213 | spec=2; |
---|
1214 | n=_n; |
---|
1215 | } |
---|
1216 | break; |
---|
1217 | case 1: |
---|
1218 | e=INVALID; |
---|
1219 | spec=1; |
---|
1220 | _G.graph->first(n, S_CLASS); //s->vmi; |
---|
1221 | if (!_G.graph->valid(n)) spec=3; //Ha S ures |
---|
1222 | break; |
---|
1223 | case 2: |
---|
1224 | e=INVALID; |
---|
1225 | spec=3; |
---|
1226 | n=INVALID; |
---|
1227 | break; |
---|
1228 | } |
---|
1229 | } |
---|
1230 | operator Edge() const { return Edge(e, spec, n); } |
---|
1231 | }; |
---|
1232 | class InEdgeIt { |
---|
1233 | friend class GraphWrapper<Graph>; |
---|
1234 | friend class stGraphWrapper<Graph>; |
---|
1235 | typename Graph::InEdgeIt e; |
---|
1236 | int spec; |
---|
1237 | typename Graph::ClassNodeIt n; |
---|
1238 | public: |
---|
1239 | InEdgeIt() { } |
---|
1240 | InEdgeIt(const typename Graph::InEdgeIt& _e, int _spec, |
---|
1241 | const typename Graph::ClassNodeIt& _n) : |
---|
1242 | e(_e), spec(_spec), n(_n) { |
---|
1243 | } |
---|
1244 | InEdgeIt(const Invalid& i) : e(i), spec(3), n(i) { } |
---|
1245 | InEdgeIt(const stGraphWrapper<Graph>& _G, const Node& _n) { |
---|
1246 | switch (_n.spec) { |
---|
1247 | case 0 : |
---|
1248 | if (_G.graph->inTClass(_n)) { //T, van normalis beel |
---|
1249 | e=typename Graph::InEdgeIt(*(_G.graph), |
---|
1250 | typename Graph::Node(_n)); |
---|
1251 | spec=0; |
---|
1252 | n=INVALID; |
---|
1253 | if (!_G.graph->valid(e)) spec=3; |
---|
1254 | } else { //S, specko beel van |
---|
1255 | e=INVALID; |
---|
1256 | spec=1; |
---|
1257 | n=_n; |
---|
1258 | } |
---|
1259 | break; |
---|
1260 | case 1: |
---|
1261 | e=INVALID; |
---|
1262 | spec=3; |
---|
1263 | n=INVALID; |
---|
1264 | case 2: |
---|
1265 | e=INVALID; |
---|
1266 | spec=1; |
---|
1267 | _G.graph->first(n, T_CLASS); //vmi->t; |
---|
1268 | if (!_G.graph->valid(n)) spec=3; //Ha T ures |
---|
1269 | break; |
---|
1270 | } |
---|
1271 | } |
---|
1272 | operator Edge() const { return Edge(e, spec, n); } |
---|
1273 | }; |
---|
1274 | class EdgeIt { |
---|
1275 | friend class GraphWrapper<Graph>; |
---|
1276 | friend class stGraphWrapper<Graph>; |
---|
1277 | typename Graph::EdgeIt e; |
---|
1278 | int spec; |
---|
1279 | typename Graph::ClassNodeIt n; |
---|
1280 | public: |
---|
1281 | EdgeIt() { } |
---|
1282 | EdgeIt(const typename Graph::EdgeIt& _e, int _spec, |
---|
1283 | const typename Graph::ClassNodeIt& _n) : |
---|
1284 | e(_e), spec(_spec), n(_n) { } |
---|
1285 | EdgeIt(const Invalid& i) : e(i), spec(3), n(i) { } |
---|
1286 | EdgeIt(const stGraphWrapper<Graph>& _G) : |
---|
1287 | e(*(_G.graph)), spec(0), n(INVALID) { |
---|
1288 | if (!_G.graph->valid(e)) { |
---|
1289 | spec=1; |
---|
1290 | _G.graph->first(n, S_CLASS); |
---|
1291 | if (!_G.graph->valid(n)) { //Ha S ures |
---|
1292 | spec=2; |
---|
1293 | _G.graph->first(n, T_CLASS); |
---|
1294 | if (!_G.graph->valid(n)) { //Ha T ures |
---|
1295 | spec=3; |
---|
1296 | } |
---|
1297 | } |
---|
1298 | } |
---|
1299 | } |
---|
1300 | operator Edge() const { return Edge(e, spec, n); } |
---|
1301 | }; |
---|
1302 | |
---|
1303 | NodeIt& first(NodeIt& i) const { |
---|
1304 | i=NodeIt(*this); return i; |
---|
1305 | } |
---|
1306 | OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { |
---|
1307 | i=OutEdgeIt(*this, p); return i; |
---|
1308 | } |
---|
1309 | InEdgeIt& first(InEdgeIt& i, const Node& p) const { |
---|
1310 | i=InEdgeIt(*this, p); return i; |
---|
1311 | } |
---|
1312 | EdgeIt& first(EdgeIt& i) const { |
---|
1313 | i=EdgeIt(*this); return i; |
---|
1314 | } |
---|
1315 | |
---|
1316 | NodeIt& next(NodeIt& i) const { |
---|
1317 | switch (i.spec) { |
---|
1318 | case 0: |
---|
1319 | this->graph->next(i.n); |
---|
1320 | if (!this->graph->valid(i.n)) { |
---|
1321 | i.spec=1; |
---|
1322 | } |
---|
1323 | break; |
---|
1324 | case 1: |
---|
1325 | i.spec=2; |
---|
1326 | break; |
---|
1327 | case 2: |
---|
1328 | i.spec=3; |
---|
1329 | break; |
---|
1330 | } |
---|
1331 | return i; |
---|
1332 | } |
---|
1333 | OutEdgeIt& next(OutEdgeIt& i) const { |
---|
1334 | typename Graph::Node v; |
---|
1335 | switch (i.spec) { |
---|
1336 | case 0: //normal edge |
---|
1337 | this->graph->aNode(i.e); |
---|
1338 | this->graph->next(i.e); |
---|
1339 | if (!this->graph->valid(i.e)) { //Az igazi elek vegere ertunk |
---|
1340 | if (this->graph->inSClass(v)) { //S, nincs kiel |
---|
1341 | i.spec=3; |
---|
1342 | i.n=INVALID; |
---|
1343 | } else { //T, van kiel |
---|
1344 | i.spec=2; |
---|
1345 | i.n=v; |
---|
1346 | } |
---|
1347 | } |
---|
1348 | break; |
---|
1349 | case 1: //s->vmi |
---|
1350 | this->graph->next(i.n); |
---|
1351 | if (!this->graph->valid(i.n)) i.spec=3; |
---|
1352 | break; |
---|
1353 | case 2: //vmi->t |
---|
1354 | i.spec=3; |
---|
1355 | i.n=INVALID; |
---|
1356 | break; |
---|
1357 | } |
---|
1358 | return i; |
---|
1359 | } |
---|
1360 | InEdgeIt& next(InEdgeIt& i) const { |
---|
1361 | typename Graph::Node v; |
---|
1362 | switch (i.spec) { |
---|
1363 | case 0: //normal edge |
---|
1364 | v=this->graph->aNode(i.e); |
---|
1365 | this->graph->next(i.e); |
---|
1366 | if (!this->graph->valid(i.e)) { //Az igazi elek vegere ertunk |
---|
1367 | if (this->graph->inTClass(v)) { //S, nincs beel |
---|
1368 | i.spec=3; |
---|
1369 | i.n=INVALID; |
---|
1370 | } else { //S, van beel |
---|
1371 | i.spec=1; |
---|
1372 | i.n=v; |
---|
1373 | } |
---|
1374 | } |
---|
1375 | break; |
---|
1376 | case 1: //s->vmi |
---|
1377 | i.spec=3; |
---|
1378 | i.n=INVALID; |
---|
1379 | break; |
---|
1380 | case 2: //vmi->t |
---|
1381 | this->graph->next(i.n); |
---|
1382 | if (!this->graph->valid(i.n)) i.spec=3; |
---|
1383 | break; |
---|
1384 | } |
---|
1385 | return i; |
---|
1386 | } |
---|
1387 | |
---|
1388 | EdgeIt& next(EdgeIt& i) const { |
---|
1389 | switch (i.spec) { |
---|
1390 | case 0: |
---|
1391 | this->graph->next(i.e); |
---|
1392 | if (!this->graph->valid(i.e)) { |
---|
1393 | i.spec=1; |
---|
1394 | this->graph->first(i.n, S_CLASS); |
---|
1395 | if (!this->graph->valid(i.n)) { |
---|
1396 | i.spec=2; |
---|
1397 | this->graph->first(i.n, T_CLASS); |
---|
1398 | if (!this->graph->valid(i.n)) i.spec=3; |
---|
1399 | } |
---|
1400 | } |
---|
1401 | break; |
---|
1402 | case 1: |
---|
1403 | this->graph->next(i.n); |
---|
1404 | if (!this->graph->valid(i.n)) { |
---|
1405 | i.spec=2; |
---|
1406 | this->graph->first(i.n, T_CLASS); |
---|
1407 | if (!this->graph->valid(i.n)) i.spec=3; |
---|
1408 | } |
---|
1409 | break; |
---|
1410 | case 2: |
---|
1411 | this->graph->next(i.n); |
---|
1412 | if (!this->graph->valid(i.n)) i.spec=3; |
---|
1413 | break; |
---|
1414 | } |
---|
1415 | return i; |
---|
1416 | } |
---|
1417 | |
---|
1418 | Node tail(const Edge& e) const { |
---|
1419 | switch (e.spec) { |
---|
1420 | case 0: |
---|
1421 | return Node(this->graph->tail(e)); |
---|
1422 | break; |
---|
1423 | case 1: |
---|
1424 | return S_NODE; |
---|
1425 | break; |
---|
1426 | case 2: |
---|
1427 | default: |
---|
1428 | return Node(e.n); |
---|
1429 | break; |
---|
1430 | } |
---|
1431 | } |
---|
1432 | Node head(const Edge& e) const { |
---|
1433 | switch (e.spec) { |
---|
1434 | case 0: |
---|
1435 | return Node(this->graph->head(e)); |
---|
1436 | break; |
---|
1437 | case 1: |
---|
1438 | return Node(e.n); |
---|
1439 | break; |
---|
1440 | case 2: |
---|
1441 | default: |
---|
1442 | return T_NODE; |
---|
1443 | break; |
---|
1444 | } |
---|
1445 | } |
---|
1446 | |
---|
1447 | bool valid(const Node& n) const { return (n.spec<3); } |
---|
1448 | bool valid(const Edge& e) const { return (e.spec<3); } |
---|
1449 | |
---|
1450 | // int nodeNum() const { return this->graph->nodeNum(); } |
---|
1451 | // int edgeNum() const { return this->graph->edgeNum(); } |
---|
1452 | |
---|
1453 | Node aNode(const OutEdgeIt& e) const { return tail(e); } |
---|
1454 | Node aNode(const InEdgeIt& e) const { return head(e); } |
---|
1455 | Node bNode(const OutEdgeIt& e) const { return head(e); } |
---|
1456 | Node bNode(const InEdgeIt& e) const { return tail(e); } |
---|
1457 | |
---|
1458 | // Node addNode() const { return Node(this->graph->addNode()); } |
---|
1459 | // Edge addEdge(const Node& tail, const Node& head) const { |
---|
1460 | // return Edge(this->graph->addEdge(tail, head)); } |
---|
1461 | |
---|
1462 | // void erase(const Node& i) const { this->graph->erase(i); } |
---|
1463 | // void erase(const Edge& i) const { this->graph->erase(i); } |
---|
1464 | |
---|
1465 | // void clear() const { this->graph->clear(); } |
---|
1466 | |
---|
1467 | template<typename T> class NodeMap : public GraphWrapper<Graph>::template NodeMap<T> { |
---|
1468 | typedef typename GraphWrapper<Graph>::template NodeMap<T> Parent; |
---|
1469 | T s_value, t_value; |
---|
1470 | public: |
---|
1471 | NodeMap(const stGraphWrapper<Graph>& _G) : Parent(_G) { } |
---|
1472 | NodeMap(const stGraphWrapper<Graph>& _G, T a) : Parent(_G, a), |
---|
1473 | s_value(a), |
---|
1474 | t_value(a) { } |
---|
1475 | T operator[](const Node& n) const { |
---|
1476 | switch (n.spec) { |
---|
1477 | case 0: |
---|
1478 | return Parent::operator[](n); |
---|
1479 | break; |
---|
1480 | case 1: |
---|
1481 | return s_value; |
---|
1482 | break; |
---|
1483 | case 2: |
---|
1484 | default: |
---|
1485 | return t_value; |
---|
1486 | break; |
---|
1487 | } |
---|
1488 | } |
---|
1489 | void set(const Node& n, T t) { |
---|
1490 | switch (n.spec) { |
---|
1491 | case 0: |
---|
1492 | GraphWrapper<Graph>::template NodeMap<T>::set(n, t); |
---|
1493 | break; |
---|
1494 | case 1: |
---|
1495 | s_value=t; |
---|
1496 | break; |
---|
1497 | case 2: |
---|
1498 | default: |
---|
1499 | t_value=t; |
---|
1500 | break; |
---|
1501 | } |
---|
1502 | } |
---|
1503 | }; |
---|
1504 | |
---|
1505 | template<typename T> class EdgeMap : public GraphWrapper<Graph>::template EdgeMap<T> { |
---|
1506 | typedef typename GraphWrapper<Graph>::template EdgeMap<T> Parent; |
---|
1507 | typename GraphWrapper<Graph>::template NodeMap<T> node_value; |
---|
1508 | public: |
---|
1509 | EdgeMap(const stGraphWrapper<Graph>& _G) : Parent(_G), |
---|
1510 | node_value(_G) { } |
---|
1511 | EdgeMap(const stGraphWrapper<Graph>& _G, T a) : Parent(_G, a), |
---|
1512 | node_value(_G, a) { } |
---|
1513 | T operator[](const Edge& e) const { |
---|
1514 | switch (e.spec) { |
---|
1515 | case 0: |
---|
1516 | return Parent::operator[](e); |
---|
1517 | break; |
---|
1518 | case 1: |
---|
1519 | return node_value[e.n]; |
---|
1520 | break; |
---|
1521 | case 2: |
---|
1522 | default: |
---|
1523 | return node_value[e.n]; |
---|
1524 | break; |
---|
1525 | } |
---|
1526 | } |
---|
1527 | void set(const Edge& e, T t) { |
---|
1528 | switch (e.spec) { |
---|
1529 | case 0: |
---|
1530 | GraphWrapper<Graph>::template EdgeMap<T>::set(e, t); |
---|
1531 | break; |
---|
1532 | case 1: |
---|
1533 | node_value.set(e.n, t); |
---|
1534 | break; |
---|
1535 | case 2: |
---|
1536 | default: |
---|
1537 | node_value.set(e.n, t); |
---|
1538 | break; |
---|
1539 | } |
---|
1540 | } |
---|
1541 | }; |
---|
1542 | }; |
---|
1543 | |
---|
1544 | ///@} |
---|
1545 | |
---|
1546 | } //namespace hugo |
---|
1547 | |
---|
1548 | |
---|
1549 | #endif //HUGO_GRAPH_WRAPPER_H |
---|
1550 | |
---|