1 | /* -*- C++ -*- |
---|
2 | * lemon/graph_utils.h - Part of LEMON, a generic C++ optimization library |
---|
3 | * |
---|
4 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
---|
5 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
---|
6 | * |
---|
7 | * Permission to use, modify and distribute this software is granted |
---|
8 | * provided that this copyright notice appears in all copies. For |
---|
9 | * precise terms see the accompanying LICENSE file. |
---|
10 | * |
---|
11 | * This software is provided "AS IS" with no warranty of any kind, |
---|
12 | * express or implied, and with no claim as to its suitability for any |
---|
13 | * purpose. |
---|
14 | * |
---|
15 | */ |
---|
16 | |
---|
17 | #ifndef LEMON_GRAPH_UTILS_H |
---|
18 | #define LEMON_GRAPH_UTILS_H |
---|
19 | |
---|
20 | #include <iterator> |
---|
21 | #include <vector> |
---|
22 | #include <map> |
---|
23 | #include <cmath> |
---|
24 | |
---|
25 | #include <lemon/invalid.h> |
---|
26 | #include <lemon/utility.h> |
---|
27 | #include <lemon/maps.h> |
---|
28 | #include <lemon/traits.h> |
---|
29 | #include <lemon/bits/alteration_notifier.h> |
---|
30 | |
---|
31 | ///\ingroup gutils |
---|
32 | ///\file |
---|
33 | ///\brief Graph utilities. |
---|
34 | /// |
---|
35 | /// |
---|
36 | |
---|
37 | |
---|
38 | namespace lemon { |
---|
39 | |
---|
40 | /// \addtogroup gutils |
---|
41 | /// @{ |
---|
42 | |
---|
43 | ///Creates convenience typedefs for the graph types and iterators |
---|
44 | |
---|
45 | ///This \c \#define creates convenience typedefs for the following types |
---|
46 | ///of \c Graph: \c Node, \c NodeIt, \c Edge, \c EdgeIt, \c InEdgeIt, |
---|
47 | ///\c OutEdgeIt, \c BoolNodeMap, \c IntNodeMap, \c DoubleNodeMap, |
---|
48 | ///\c BoolEdgeMap, \c IntEdgeMap, \c DoubleEdgeMap. |
---|
49 | ///\note If \c G it a template parameter, it should be used in this way. |
---|
50 | ///\code |
---|
51 | /// GRAPH_TYPEDEFS(typename G) |
---|
52 | ///\endcode |
---|
53 | /// |
---|
54 | ///\warning There are no typedefs for the graph maps because of the lack of |
---|
55 | ///template typedefs in C++. |
---|
56 | #define GRAPH_TYPEDEFS(Graph) \ |
---|
57 | typedef Graph:: Node Node; \ |
---|
58 | typedef Graph:: NodeIt NodeIt; \ |
---|
59 | typedef Graph:: Edge Edge; \ |
---|
60 | typedef Graph:: EdgeIt EdgeIt; \ |
---|
61 | typedef Graph:: InEdgeIt InEdgeIt; \ |
---|
62 | typedef Graph::OutEdgeIt OutEdgeIt; |
---|
63 | // typedef Graph::template NodeMap<bool> BoolNodeMap; |
---|
64 | // typedef Graph::template NodeMap<int> IntNodeMap; |
---|
65 | // typedef Graph::template NodeMap<double> DoubleNodeMap; |
---|
66 | // typedef Graph::template EdgeMap<bool> BoolEdgeMap; |
---|
67 | // typedef Graph::template EdgeMap<int> IntEdgeMap; |
---|
68 | // typedef Graph::template EdgeMap<double> DoubleEdgeMap; |
---|
69 | |
---|
70 | ///Creates convenience typedefs for the undirected graph types and iterators |
---|
71 | |
---|
72 | ///This \c \#define creates the same convenience typedefs as defined by |
---|
73 | ///\ref GRAPH_TYPEDEFS(Graph) and three more, namely it creates |
---|
74 | ///\c UndirEdge, \c UndirEdgeIt, \c IncEdgeIt, |
---|
75 | ///\c BoolUndirEdgeMap, \c IntUndirEdgeMap, \c DoubleUndirEdgeMap. |
---|
76 | /// |
---|
77 | ///\note If \c G it a template parameter, it should be used in this way. |
---|
78 | ///\code |
---|
79 | /// UNDIRGRAPH_TYPEDEFS(typename G) |
---|
80 | ///\endcode |
---|
81 | /// |
---|
82 | ///\warning There are no typedefs for the graph maps because of the lack of |
---|
83 | ///template typedefs in C++. |
---|
84 | #define UNDIRGRAPH_TYPEDEFS(Graph) \ |
---|
85 | GRAPH_TYPEDEFS(Graph) \ |
---|
86 | typedef Graph:: UndirEdge UndirEdge; \ |
---|
87 | typedef Graph:: UndirEdgeIt UndirEdgeIt; \ |
---|
88 | typedef Graph:: IncEdgeIt IncEdgeIt; |
---|
89 | // typedef Graph::template UndirEdgeMap<bool> BoolUndirEdgeMap; |
---|
90 | // typedef Graph::template UndirEdgeMap<int> IntUndirEdgeMap; |
---|
91 | // typedef Graph::template UndirEdgeMap<double> DoubleUndirEdgeMap; |
---|
92 | |
---|
93 | |
---|
94 | |
---|
95 | /// \brief Function to count the items in the graph. |
---|
96 | /// |
---|
97 | /// This function counts the items (nodes, edges etc) in the graph. |
---|
98 | /// The complexity of the function is O(n) because |
---|
99 | /// it iterates on all of the items. |
---|
100 | |
---|
101 | template <typename Graph, typename ItemIt> |
---|
102 | inline int countItems(const Graph& g) { |
---|
103 | int num = 0; |
---|
104 | for (ItemIt it(g); it != INVALID; ++it) { |
---|
105 | ++num; |
---|
106 | } |
---|
107 | return num; |
---|
108 | } |
---|
109 | |
---|
110 | // Node counting: |
---|
111 | |
---|
112 | template <typename Graph> |
---|
113 | inline typename enable_if<typename Graph::NodeNumTag, int>::type |
---|
114 | _countNodes(const Graph &g) { |
---|
115 | return g.nodeNum(); |
---|
116 | } |
---|
117 | |
---|
118 | template <typename Graph> |
---|
119 | inline int _countNodes(Wrap<Graph> w) { |
---|
120 | return countItems<Graph, typename Graph::NodeIt>(w.value); |
---|
121 | } |
---|
122 | |
---|
123 | /// \brief Function to count the nodes in the graph. |
---|
124 | /// |
---|
125 | /// This function counts the nodes in the graph. |
---|
126 | /// The complexity of the function is O(n) but for some |
---|
127 | /// graph structures it is specialized to run in O(1). |
---|
128 | /// |
---|
129 | /// \todo refer how to specialize it |
---|
130 | |
---|
131 | template <typename Graph> |
---|
132 | inline int countNodes(const Graph& g) { |
---|
133 | return _countNodes<Graph>(g); |
---|
134 | } |
---|
135 | |
---|
136 | // Edge counting: |
---|
137 | |
---|
138 | template <typename Graph> |
---|
139 | inline typename enable_if<typename Graph::EdgeNumTag, int>::type |
---|
140 | _countEdges(const Graph &g) { |
---|
141 | return g.edgeNum(); |
---|
142 | } |
---|
143 | |
---|
144 | template <typename Graph> |
---|
145 | inline int _countEdges(Wrap<Graph> w) { |
---|
146 | return countItems<Graph, typename Graph::EdgeIt>(w.value); |
---|
147 | } |
---|
148 | |
---|
149 | /// \brief Function to count the edges in the graph. |
---|
150 | /// |
---|
151 | /// This function counts the edges in the graph. |
---|
152 | /// The complexity of the function is O(e) but for some |
---|
153 | /// graph structures it is specialized to run in O(1). |
---|
154 | |
---|
155 | template <typename Graph> |
---|
156 | inline int countEdges(const Graph& g) { |
---|
157 | return _countEdges<Graph>(g); |
---|
158 | } |
---|
159 | |
---|
160 | // Undirected edge counting: |
---|
161 | |
---|
162 | template <typename Graph> |
---|
163 | inline |
---|
164 | typename enable_if<typename Graph::EdgeNumTag, int>::type |
---|
165 | _countUndirEdges(const Graph &g) { |
---|
166 | return g.undirEdgeNum(); |
---|
167 | } |
---|
168 | |
---|
169 | template <typename Graph> |
---|
170 | inline int _countUndirEdges(Wrap<Graph> w) { |
---|
171 | return countItems<Graph, typename Graph::UndirEdgeIt>(w.value); |
---|
172 | } |
---|
173 | |
---|
174 | /// \brief Function to count the undirected edges in the graph. |
---|
175 | /// |
---|
176 | /// This function counts the undirected edges in the graph. |
---|
177 | /// The complexity of the function is O(e) but for some |
---|
178 | /// graph structures it is specialized to run in O(1). |
---|
179 | |
---|
180 | template <typename Graph> |
---|
181 | inline int countUndirEdges(const Graph& g) { |
---|
182 | return _countUndirEdges<Graph>(g); |
---|
183 | } |
---|
184 | |
---|
185 | |
---|
186 | |
---|
187 | template <typename Graph, typename DegIt> |
---|
188 | inline int countNodeDegree(const Graph& _g, const typename Graph::Node& _n) { |
---|
189 | int num = 0; |
---|
190 | for (DegIt it(_g, _n); it != INVALID; ++it) { |
---|
191 | ++num; |
---|
192 | } |
---|
193 | return num; |
---|
194 | } |
---|
195 | |
---|
196 | /// \brief Function to count the number of the out-edges from node \c n. |
---|
197 | /// |
---|
198 | /// This function counts the number of the out-edges from node \c n |
---|
199 | /// in the graph. |
---|
200 | template <typename Graph> |
---|
201 | inline int countOutEdges(const Graph& _g, const typename Graph::Node& _n) { |
---|
202 | return countNodeDegree<Graph, typename Graph::OutEdgeIt>(_g, _n); |
---|
203 | } |
---|
204 | |
---|
205 | /// \brief Function to count the number of the in-edges to node \c n. |
---|
206 | /// |
---|
207 | /// This function counts the number of the in-edges to node \c n |
---|
208 | /// in the graph. |
---|
209 | template <typename Graph> |
---|
210 | inline int countInEdges(const Graph& _g, const typename Graph::Node& _n) { |
---|
211 | return countNodeDegree<Graph, typename Graph::InEdgeIt>(_g, _n); |
---|
212 | } |
---|
213 | |
---|
214 | /// \brief Function to count the number of the inc-edges to node \c n. |
---|
215 | /// |
---|
216 | /// This function counts the number of the inc-edges to node \c n |
---|
217 | /// in the graph. |
---|
218 | template <typename Graph> |
---|
219 | inline int countIncEdges(const Graph& _g, const typename Graph::Node& _n) { |
---|
220 | return countNodeDegree<Graph, typename Graph::IncEdgeIt>(_g, _n); |
---|
221 | } |
---|
222 | |
---|
223 | |
---|
224 | template <typename Graph> |
---|
225 | inline |
---|
226 | typename enable_if<typename Graph::FindEdgeTag, typename Graph::Edge>::type |
---|
227 | _findEdge(const Graph &g, |
---|
228 | typename Graph::Node u, typename Graph::Node v, |
---|
229 | typename Graph::Edge prev = INVALID) { |
---|
230 | return g.findEdge(u, v, prev); |
---|
231 | } |
---|
232 | |
---|
233 | template <typename Graph> |
---|
234 | inline typename Graph::Edge |
---|
235 | _findEdge(Wrap<Graph> w, |
---|
236 | typename Graph::Node u, |
---|
237 | typename Graph::Node v, |
---|
238 | typename Graph::Edge prev = INVALID) { |
---|
239 | const Graph& g = w.value; |
---|
240 | if (prev == INVALID) { |
---|
241 | typename Graph::OutEdgeIt e(g, u); |
---|
242 | while (e != INVALID && g.target(e) != v) ++e; |
---|
243 | return e; |
---|
244 | } else { |
---|
245 | typename Graph::OutEdgeIt e(g, prev); ++e; |
---|
246 | while (e != INVALID && g.target(e) != v) ++e; |
---|
247 | return e; |
---|
248 | } |
---|
249 | } |
---|
250 | |
---|
251 | /// \brief Finds an edge between two nodes of a graph. |
---|
252 | /// |
---|
253 | /// Finds an edge from node \c u to node \c v in graph \c g. |
---|
254 | /// |
---|
255 | /// If \c prev is \ref INVALID (this is the default value), then |
---|
256 | /// it finds the first edge from \c u to \c v. Otherwise it looks for |
---|
257 | /// the next edge from \c u to \c v after \c prev. |
---|
258 | /// \return The found edge or \ref INVALID if there is no such an edge. |
---|
259 | /// |
---|
260 | /// Thus you can iterate through each edge from \c u to \c v as it follows. |
---|
261 | /// \code |
---|
262 | /// for(Edge e=findEdge(g,u,v);e!=INVALID;e=findEdge(g,u,v,e)) { |
---|
263 | /// ... |
---|
264 | /// } |
---|
265 | /// \endcode |
---|
266 | // /// \todo We may want to use the "GraphBase" |
---|
267 | // /// interface here... |
---|
268 | template <typename Graph> |
---|
269 | inline typename Graph::Edge findEdge(const Graph &g, |
---|
270 | typename Graph::Node u, |
---|
271 | typename Graph::Node v, |
---|
272 | typename Graph::Edge prev = INVALID) { |
---|
273 | return _findEdge<Graph>(g, u, v, prev); |
---|
274 | } |
---|
275 | |
---|
276 | /// \brief Iterator for iterating on edges connected the same nodes. |
---|
277 | /// |
---|
278 | /// Iterator for iterating on edges connected the same nodes. It is |
---|
279 | /// higher level interface for the findEdge() function. You can |
---|
280 | /// use it the following way: |
---|
281 | /// \code |
---|
282 | /// for (ConEdgeIt<Graph> it(g, src, trg); it != INVALID; ++it) { |
---|
283 | /// ... |
---|
284 | /// } |
---|
285 | /// \endcode |
---|
286 | /// |
---|
287 | /// \author Balazs Dezso |
---|
288 | template <typename _Graph> |
---|
289 | class ConEdgeIt : public _Graph::Edge { |
---|
290 | public: |
---|
291 | |
---|
292 | typedef _Graph Graph; |
---|
293 | typedef typename Graph::Edge Parent; |
---|
294 | |
---|
295 | typedef typename Graph::Edge Edge; |
---|
296 | typedef typename Graph::Node Node; |
---|
297 | |
---|
298 | /// \brief Constructor. |
---|
299 | /// |
---|
300 | /// Construct a new ConEdgeIt iterating on the edges which |
---|
301 | /// connects the \c u and \c v node. |
---|
302 | ConEdgeIt(const Graph& g, Node u, Node v) : graph(g) { |
---|
303 | Parent::operator=(findEdge(graph, u, v)); |
---|
304 | } |
---|
305 | |
---|
306 | /// \brief Constructor. |
---|
307 | /// |
---|
308 | /// Construct a new ConEdgeIt which continues the iterating from |
---|
309 | /// the \c e edge. |
---|
310 | ConEdgeIt(const Graph& g, Edge e) : Parent(e), graph(g) {} |
---|
311 | |
---|
312 | /// \brief Increment operator. |
---|
313 | /// |
---|
314 | /// It increments the iterator and gives back the next edge. |
---|
315 | ConEdgeIt& operator++() { |
---|
316 | Parent::operator=(findEdge(graph, graph.source(*this), |
---|
317 | graph.target(*this), *this)); |
---|
318 | return *this; |
---|
319 | } |
---|
320 | private: |
---|
321 | const Graph& graph; |
---|
322 | }; |
---|
323 | |
---|
324 | template <typename Graph> |
---|
325 | inline |
---|
326 | typename enable_if< |
---|
327 | typename Graph::FindEdgeTag, |
---|
328 | typename Graph::UndirEdge>::type |
---|
329 | _findUndirEdge(const Graph &g, |
---|
330 | typename Graph::Node u, typename Graph::Node v, |
---|
331 | typename Graph::UndirEdge prev = INVALID) { |
---|
332 | return g.findUndirEdge(u, v, prev); |
---|
333 | } |
---|
334 | |
---|
335 | template <typename Graph> |
---|
336 | inline typename Graph::UndirEdge |
---|
337 | _findUndirEdge(Wrap<Graph> w, |
---|
338 | typename Graph::Node u, |
---|
339 | typename Graph::Node v, |
---|
340 | typename Graph::UndirEdge prev = INVALID) { |
---|
341 | const Graph& g = w.value; |
---|
342 | if (prev == INVALID) { |
---|
343 | typename Graph::OutEdgeIt e(g, u); |
---|
344 | while (e != INVALID && g.target(e) != v) ++e; |
---|
345 | return e; |
---|
346 | } else { |
---|
347 | typename Graph::OutEdgeIt e(g, g.direct(prev, u)); ++e; |
---|
348 | while (e != INVALID && g.target(e) != v) ++e; |
---|
349 | return e; |
---|
350 | } |
---|
351 | } |
---|
352 | |
---|
353 | /// \brief Finds an undir edge between two nodes of a graph. |
---|
354 | /// |
---|
355 | /// Finds an undir edge from node \c u to node \c v in graph \c g. |
---|
356 | /// |
---|
357 | /// If \c prev is \ref INVALID (this is the default value), then |
---|
358 | /// it finds the first edge from \c u to \c v. Otherwise it looks for |
---|
359 | /// the next edge from \c u to \c v after \c prev. |
---|
360 | /// \return The found edge or \ref INVALID if there is no such an edge. |
---|
361 | /// |
---|
362 | /// Thus you can iterate through each edge from \c u to \c v as it follows. |
---|
363 | /// \code |
---|
364 | /// for(UndirEdge e = findUndirEdge(g,u,v); e != INVALID; |
---|
365 | /// e = findUndirEdge(g,u,v,e)) { |
---|
366 | /// ... |
---|
367 | /// } |
---|
368 | /// \endcode |
---|
369 | // /// \todo We may want to use the "GraphBase" |
---|
370 | // /// interface here... |
---|
371 | template <typename Graph> |
---|
372 | inline typename Graph::UndirEdge |
---|
373 | findUndirEdge(const Graph &g, |
---|
374 | typename Graph::Node u, |
---|
375 | typename Graph::Node v, |
---|
376 | typename Graph::UndirEdge prev = INVALID) { |
---|
377 | return _findUndirEdge<Graph>(g, u, v, prev); |
---|
378 | } |
---|
379 | |
---|
380 | /// \brief Iterator for iterating on undir edges connected the same nodes. |
---|
381 | /// |
---|
382 | /// Iterator for iterating on undir edges connected the same nodes. It is |
---|
383 | /// higher level interface for the findUndirEdge() function. You can |
---|
384 | /// use it the following way: |
---|
385 | /// \code |
---|
386 | /// for (ConUndirEdgeIt<Graph> it(g, src, trg); it != INVALID; ++it) { |
---|
387 | /// ... |
---|
388 | /// } |
---|
389 | /// \endcode |
---|
390 | /// |
---|
391 | /// \author Balazs Dezso |
---|
392 | template <typename _Graph> |
---|
393 | class ConUndirEdgeIt : public _Graph::UndirEdge { |
---|
394 | public: |
---|
395 | |
---|
396 | typedef _Graph Graph; |
---|
397 | typedef typename Graph::UndirEdge Parent; |
---|
398 | |
---|
399 | typedef typename Graph::UndirEdge UndirEdge; |
---|
400 | typedef typename Graph::Node Node; |
---|
401 | |
---|
402 | /// \brief Constructor. |
---|
403 | /// |
---|
404 | /// Construct a new ConUndirEdgeIt iterating on the edges which |
---|
405 | /// connects the \c u and \c v node. |
---|
406 | ConUndirEdgeIt(const Graph& g, Node u, Node v) : graph(g) { |
---|
407 | Parent::operator=(findUndirEdge(graph, u, v)); |
---|
408 | } |
---|
409 | |
---|
410 | /// \brief Constructor. |
---|
411 | /// |
---|
412 | /// Construct a new ConUndirEdgeIt which continues the iterating from |
---|
413 | /// the \c e edge. |
---|
414 | ConUndirEdgeIt(const Graph& g, UndirEdge e) : Parent(e), graph(g) {} |
---|
415 | |
---|
416 | /// \brief Increment operator. |
---|
417 | /// |
---|
418 | /// It increments the iterator and gives back the next edge. |
---|
419 | ConUndirEdgeIt& operator++() { |
---|
420 | Parent::operator=(findUndirEdge(graph, graph.source(*this), |
---|
421 | graph.target(*this), *this)); |
---|
422 | return *this; |
---|
423 | } |
---|
424 | private: |
---|
425 | const Graph& graph; |
---|
426 | }; |
---|
427 | |
---|
428 | /// \brief Copy a map. |
---|
429 | /// |
---|
430 | /// This function copies the \c source map to the \c target map. It uses the |
---|
431 | /// given iterator to iterate on the data structure and it uses the \c ref |
---|
432 | /// mapping to convert the source's keys to the target's keys. |
---|
433 | template <typename Target, typename Source, |
---|
434 | typename ItemIt, typename Ref> |
---|
435 | void copyMap(Target& target, const Source& source, |
---|
436 | ItemIt it, const Ref& ref) { |
---|
437 | for (; it != INVALID; ++it) { |
---|
438 | target[ref[it]] = source[it]; |
---|
439 | } |
---|
440 | } |
---|
441 | |
---|
442 | /// \brief Copy the source map to the target map. |
---|
443 | /// |
---|
444 | /// Copy the \c source map to the \c target map. It uses the given iterator |
---|
445 | /// to iterate on the data structure. |
---|
446 | template <typename Target, typename Source, typename ItemIt> |
---|
447 | void copyMap(Target& target, const Source& source, ItemIt it) { |
---|
448 | for (; it != INVALID; ++it) { |
---|
449 | target[it] = source[it]; |
---|
450 | } |
---|
451 | } |
---|
452 | |
---|
453 | /// \brief Class to copy a graph. |
---|
454 | /// |
---|
455 | /// Class to copy a graph to an other graph (duplicate a graph). The |
---|
456 | /// simplest way of using it is through the \c copyGraph() function. |
---|
457 | template <typename Target, typename Source> |
---|
458 | class GraphCopy { |
---|
459 | public: |
---|
460 | typedef typename Source::Node Node; |
---|
461 | typedef typename Source::NodeIt NodeIt; |
---|
462 | typedef typename Source::Edge Edge; |
---|
463 | typedef typename Source::EdgeIt EdgeIt; |
---|
464 | |
---|
465 | typedef typename Source::template NodeMap<typename Target::Node>NodeRefMap; |
---|
466 | typedef typename Source::template EdgeMap<typename Target::Edge>EdgeRefMap; |
---|
467 | |
---|
468 | /// \brief Constructor for the GraphCopy. |
---|
469 | /// |
---|
470 | /// It copies the content of the \c _source graph into the |
---|
471 | /// \c _target graph. It creates also two references, one beetween |
---|
472 | /// the two nodeset and one beetween the two edgesets. |
---|
473 | GraphCopy(Target& _target, const Source& _source) |
---|
474 | : source(_source), target(_target), |
---|
475 | nodeRefMap(_source), edgeRefMap(_source) { |
---|
476 | for (NodeIt it(source); it != INVALID; ++it) { |
---|
477 | nodeRefMap[it] = target.addNode(); |
---|
478 | } |
---|
479 | for (EdgeIt it(source); it != INVALID; ++it) { |
---|
480 | edgeRefMap[it] = target.addEdge(nodeRefMap[source.source(it)], |
---|
481 | nodeRefMap[source.target(it)]); |
---|
482 | } |
---|
483 | } |
---|
484 | |
---|
485 | /// \brief Copies the node references into the given map. |
---|
486 | /// |
---|
487 | /// Copies the node references into the given map. |
---|
488 | template <typename NodeRef> |
---|
489 | const GraphCopy& nodeRef(NodeRef& map) const { |
---|
490 | for (NodeIt it(source); it != INVALID; ++it) { |
---|
491 | map.set(it, nodeRefMap[it]); |
---|
492 | } |
---|
493 | return *this; |
---|
494 | } |
---|
495 | |
---|
496 | /// \brief Reverse and copies the node references into the given map. |
---|
497 | /// |
---|
498 | /// Reverse and copies the node references into the given map. |
---|
499 | template <typename NodeRef> |
---|
500 | const GraphCopy& nodeCrossRef(NodeRef& map) const { |
---|
501 | for (NodeIt it(source); it != INVALID; ++it) { |
---|
502 | map.set(nodeRefMap[it], it); |
---|
503 | } |
---|
504 | return *this; |
---|
505 | } |
---|
506 | |
---|
507 | /// \brief Copies the edge references into the given map. |
---|
508 | /// |
---|
509 | /// Copies the edge references into the given map. |
---|
510 | template <typename EdgeRef> |
---|
511 | const GraphCopy& edgeRef(EdgeRef& map) const { |
---|
512 | for (EdgeIt it(source); it != INVALID; ++it) { |
---|
513 | map.set(it, edgeRefMap[it]); |
---|
514 | } |
---|
515 | return *this; |
---|
516 | } |
---|
517 | |
---|
518 | /// \brief Reverse and copies the edge references into the given map. |
---|
519 | /// |
---|
520 | /// Reverse and copies the edge references into the given map. |
---|
521 | template <typename EdgeRef> |
---|
522 | const GraphCopy& edgeCrossRef(EdgeRef& map) const { |
---|
523 | for (EdgeIt it(source); it != INVALID; ++it) { |
---|
524 | map.set(edgeRefMap[it], it); |
---|
525 | } |
---|
526 | return *this; |
---|
527 | } |
---|
528 | |
---|
529 | /// \brief Make copy of the given map. |
---|
530 | /// |
---|
531 | /// Makes copy of the given map for the newly created graph. |
---|
532 | /// The new map's key type is the target graph's node type, |
---|
533 | /// and the copied map's key type is the source graph's node |
---|
534 | /// type. |
---|
535 | template <typename TargetMap, typename SourceMap> |
---|
536 | const GraphCopy& nodeMap(TargetMap& tMap, const SourceMap& sMap) const { |
---|
537 | copyMap(tMap, sMap, NodeIt(source), nodeRefMap); |
---|
538 | return *this; |
---|
539 | } |
---|
540 | |
---|
541 | /// \brief Make copy of the given map. |
---|
542 | /// |
---|
543 | /// Makes copy of the given map for the newly created graph. |
---|
544 | /// The new map's key type is the target graph's edge type, |
---|
545 | /// and the copied map's key type is the source graph's edge |
---|
546 | /// type. |
---|
547 | template <typename TargetMap, typename SourceMap> |
---|
548 | const GraphCopy& edgeMap(TargetMap& tMap, const SourceMap& sMap) const { |
---|
549 | copyMap(tMap, sMap, EdgeIt(source), edgeRefMap); |
---|
550 | return *this; |
---|
551 | } |
---|
552 | |
---|
553 | /// \brief Gives back the stored node references. |
---|
554 | /// |
---|
555 | /// Gives back the stored node references. |
---|
556 | const NodeRefMap& nodeRef() const { |
---|
557 | return nodeRefMap; |
---|
558 | } |
---|
559 | |
---|
560 | /// \brief Gives back the stored edge references. |
---|
561 | /// |
---|
562 | /// Gives back the stored edge references. |
---|
563 | const EdgeRefMap& edgeRef() const { |
---|
564 | return edgeRefMap; |
---|
565 | } |
---|
566 | |
---|
567 | void run() {} |
---|
568 | |
---|
569 | private: |
---|
570 | |
---|
571 | const Source& source; |
---|
572 | Target& target; |
---|
573 | |
---|
574 | NodeRefMap nodeRefMap; |
---|
575 | EdgeRefMap edgeRefMap; |
---|
576 | }; |
---|
577 | |
---|
578 | /// \brief Copy a graph to an other graph. |
---|
579 | /// |
---|
580 | /// Copy a graph to an other graph. |
---|
581 | /// The usage of the function: |
---|
582 | /// |
---|
583 | /// \code |
---|
584 | /// copyGraph(trg, src).nodeRef(nr).edgeCrossRef(ecr); |
---|
585 | /// \endcode |
---|
586 | /// |
---|
587 | /// After the copy the \c nr map will contain the mapping from the |
---|
588 | /// source graph's nodes to the target graph's nodes and the \c ecr will |
---|
589 | /// contain the mapping from the target graph's edges to the source's |
---|
590 | /// edges. |
---|
591 | template <typename Target, typename Source> |
---|
592 | GraphCopy<Target, Source> copyGraph(Target& target, const Source& source) { |
---|
593 | return GraphCopy<Target, Source>(target, source); |
---|
594 | } |
---|
595 | |
---|
596 | /// \brief Class to copy an undirected graph. |
---|
597 | /// |
---|
598 | /// Class to copy an undirected graph to an other graph (duplicate a graph). |
---|
599 | /// The simplest way of using it is through the \c copyUndirGraph() function. |
---|
600 | template <typename Target, typename Source> |
---|
601 | class UndirGraphCopy { |
---|
602 | public: |
---|
603 | typedef typename Source::Node Node; |
---|
604 | typedef typename Source::NodeIt NodeIt; |
---|
605 | typedef typename Source::Edge Edge; |
---|
606 | typedef typename Source::EdgeIt EdgeIt; |
---|
607 | typedef typename Source::UndirEdge UndirEdge; |
---|
608 | typedef typename Source::UndirEdgeIt UndirEdgeIt; |
---|
609 | |
---|
610 | typedef typename Source:: |
---|
611 | template NodeMap<typename Target::Node> NodeRefMap; |
---|
612 | |
---|
613 | typedef typename Source:: |
---|
614 | template UndirEdgeMap<typename Target::UndirEdge> UndirEdgeRefMap; |
---|
615 | |
---|
616 | private: |
---|
617 | |
---|
618 | struct EdgeRefMap { |
---|
619 | EdgeRefMap(UndirGraphCopy& _gc) : gc(_gc) {} |
---|
620 | typedef typename Source::Edge Key; |
---|
621 | typedef typename Target::Edge Value; |
---|
622 | |
---|
623 | Value operator[](const Key& key) { |
---|
624 | return gc.target.direct(gc.undirEdgeRef[key], |
---|
625 | gc.target.direction(key)); |
---|
626 | } |
---|
627 | |
---|
628 | UndirGraphCopy& gc; |
---|
629 | }; |
---|
630 | |
---|
631 | public: |
---|
632 | |
---|
633 | /// \brief Constructor for the UndirGraphCopy. |
---|
634 | /// |
---|
635 | /// It copies the content of the \c _source graph into the |
---|
636 | /// \c _target graph. It creates also two references, one beetween |
---|
637 | /// the two nodeset and one beetween the two edgesets. |
---|
638 | UndirGraphCopy(Target& _target, const Source& _source) |
---|
639 | : source(_source), target(_target), |
---|
640 | nodeRefMap(_source), edgeRefMap(*this), undirEdgeRefMap(_source) { |
---|
641 | for (NodeIt it(source); it != INVALID; ++it) { |
---|
642 | nodeRefMap[it] = target.addNode(); |
---|
643 | } |
---|
644 | for (UndirEdgeIt it(source); it != INVALID; ++it) { |
---|
645 | undirEdgeRefMap[it] = target.addEdge(nodeRefMap[source.source(it)], |
---|
646 | nodeRefMap[source.target(it)]); |
---|
647 | } |
---|
648 | } |
---|
649 | |
---|
650 | /// \brief Copies the node references into the given map. |
---|
651 | /// |
---|
652 | /// Copies the node references into the given map. |
---|
653 | template <typename NodeRef> |
---|
654 | const UndirGraphCopy& nodeRef(NodeRef& map) const { |
---|
655 | for (NodeIt it(source); it != INVALID; ++it) { |
---|
656 | map.set(it, nodeRefMap[it]); |
---|
657 | } |
---|
658 | return *this; |
---|
659 | } |
---|
660 | |
---|
661 | /// \brief Reverse and copies the node references into the given map. |
---|
662 | /// |
---|
663 | /// Reverse and copies the node references into the given map. |
---|
664 | template <typename NodeRef> |
---|
665 | const UndirGraphCopy& nodeCrossRef(NodeRef& map) const { |
---|
666 | for (NodeIt it(source); it != INVALID; ++it) { |
---|
667 | map.set(nodeRefMap[it], it); |
---|
668 | } |
---|
669 | return *this; |
---|
670 | } |
---|
671 | |
---|
672 | /// \brief Copies the edge references into the given map. |
---|
673 | /// |
---|
674 | /// Copies the edge references into the given map. |
---|
675 | template <typename EdgeRef> |
---|
676 | const UndirGraphCopy& edgeRef(EdgeRef& map) const { |
---|
677 | for (EdgeIt it(source); it != INVALID; ++it) { |
---|
678 | map.set(edgeRefMap[it], it); |
---|
679 | } |
---|
680 | return *this; |
---|
681 | } |
---|
682 | |
---|
683 | /// \brief Reverse and copies the undirected edge references into the |
---|
684 | /// given map. |
---|
685 | /// |
---|
686 | /// Reverse and copies the undirected edge references into the given map. |
---|
687 | template <typename EdgeRef> |
---|
688 | const UndirGraphCopy& edgeCrossRef(EdgeRef& map) const { |
---|
689 | for (EdgeIt it(source); it != INVALID; ++it) { |
---|
690 | map.set(it, edgeRefMap[it]); |
---|
691 | } |
---|
692 | return *this; |
---|
693 | } |
---|
694 | |
---|
695 | /// \brief Copies the undirected edge references into the given map. |
---|
696 | /// |
---|
697 | /// Copies the undirected edge references into the given map. |
---|
698 | template <typename EdgeRef> |
---|
699 | const UndirGraphCopy& undirEdgeRef(EdgeRef& map) const { |
---|
700 | for (UndirEdgeIt it(source); it != INVALID; ++it) { |
---|
701 | map.set(it, undirEdgeRefMap[it]); |
---|
702 | } |
---|
703 | return *this; |
---|
704 | } |
---|
705 | |
---|
706 | /// \brief Reverse and copies the undirected edge references into the |
---|
707 | /// given map. |
---|
708 | /// |
---|
709 | /// Reverse and copies the undirected edge references into the given map. |
---|
710 | template <typename EdgeRef> |
---|
711 | const UndirGraphCopy& undirEdgeCrossRef(EdgeRef& map) const { |
---|
712 | for (UndirEdgeIt it(source); it != INVALID; ++it) { |
---|
713 | map.set(undirEdgeRefMap[it], it); |
---|
714 | } |
---|
715 | return *this; |
---|
716 | } |
---|
717 | |
---|
718 | /// \brief Make copy of the given map. |
---|
719 | /// |
---|
720 | /// Makes copy of the given map for the newly created graph. |
---|
721 | /// The new map's key type is the target graph's node type, |
---|
722 | /// and the copied map's key type is the source graph's node |
---|
723 | /// type. |
---|
724 | template <typename TargetMap, typename SourceMap> |
---|
725 | const UndirGraphCopy& nodeMap(TargetMap& tMap, |
---|
726 | const SourceMap& sMap) const { |
---|
727 | copyMap(tMap, sMap, NodeIt(source), nodeRefMap); |
---|
728 | return *this; |
---|
729 | } |
---|
730 | |
---|
731 | /// \brief Make copy of the given map. |
---|
732 | /// |
---|
733 | /// Makes copy of the given map for the newly created graph. |
---|
734 | /// The new map's key type is the target graph's edge type, |
---|
735 | /// and the copied map's key type is the source graph's edge |
---|
736 | /// type. |
---|
737 | template <typename TargetMap, typename SourceMap> |
---|
738 | const UndirGraphCopy& edgeMap(TargetMap& tMap, |
---|
739 | const SourceMap& sMap) const { |
---|
740 | copyMap(tMap, sMap, EdgeIt(source), edgeRefMap); |
---|
741 | return *this; |
---|
742 | } |
---|
743 | |
---|
744 | /// \brief Make copy of the given map. |
---|
745 | /// |
---|
746 | /// Makes copy of the given map for the newly created graph. |
---|
747 | /// The new map's key type is the target graph's edge type, |
---|
748 | /// and the copied map's key type is the source graph's edge |
---|
749 | /// type. |
---|
750 | template <typename TargetMap, typename SourceMap> |
---|
751 | const UndirGraphCopy& undirEdgeMap(TargetMap& tMap, |
---|
752 | const SourceMap& sMap) const { |
---|
753 | copyMap(tMap, sMap, UndirEdgeIt(source), undirEdgeRefMap); |
---|
754 | return *this; |
---|
755 | } |
---|
756 | |
---|
757 | /// \brief Gives back the stored node references. |
---|
758 | /// |
---|
759 | /// Gives back the stored node references. |
---|
760 | const NodeRefMap& nodeRef() const { |
---|
761 | return nodeRefMap; |
---|
762 | } |
---|
763 | |
---|
764 | /// \brief Gives back the stored edge references. |
---|
765 | /// |
---|
766 | /// Gives back the stored edge references. |
---|
767 | const EdgeRefMap& edgeRef() const { |
---|
768 | return edgeRefMap; |
---|
769 | } |
---|
770 | |
---|
771 | /// \brief Gives back the stored undir edge references. |
---|
772 | /// |
---|
773 | /// Gives back the stored undir edge references. |
---|
774 | const UndirEdgeRefMap& undirEdgeRef() const { |
---|
775 | return undirEdgeRefMap; |
---|
776 | } |
---|
777 | |
---|
778 | void run() {} |
---|
779 | |
---|
780 | private: |
---|
781 | |
---|
782 | const Source& source; |
---|
783 | Target& target; |
---|
784 | |
---|
785 | NodeRefMap nodeRefMap; |
---|
786 | EdgeRefMap edgeRefMap; |
---|
787 | UndirEdgeRefMap undirEdgeRefMap; |
---|
788 | }; |
---|
789 | |
---|
790 | /// \brief Copy a graph to an other graph. |
---|
791 | /// |
---|
792 | /// Copy a graph to an other graph. |
---|
793 | /// The usage of the function: |
---|
794 | /// |
---|
795 | /// \code |
---|
796 | /// copyGraph(trg, src).nodeRef(nr).edgeCrossRef(ecr); |
---|
797 | /// \endcode |
---|
798 | /// |
---|
799 | /// After the copy the \c nr map will contain the mapping from the |
---|
800 | /// source graph's nodes to the target graph's nodes and the \c ecr will |
---|
801 | /// contain the mapping from the target graph's edges to the source's |
---|
802 | /// edges. |
---|
803 | template <typename Target, typename Source> |
---|
804 | UndirGraphCopy<Target, Source> |
---|
805 | copyUndirGraph(Target& target, const Source& source) { |
---|
806 | return UndirGraphCopy<Target, Source>(target, source); |
---|
807 | } |
---|
808 | |
---|
809 | |
---|
810 | /// @} |
---|
811 | |
---|
812 | /// \addtogroup graph_maps |
---|
813 | /// @{ |
---|
814 | |
---|
815 | /// Provides an immutable and unique id for each item in the graph. |
---|
816 | |
---|
817 | /// The IdMap class provides a unique and immutable id for each item of the |
---|
818 | /// same type (e.g. node) in the graph. This id is <ul><li>\b unique: |
---|
819 | /// different items (nodes) get different ids <li>\b immutable: the id of an |
---|
820 | /// item (node) does not change (even if you delete other nodes). </ul> |
---|
821 | /// Through this map you get access (i.e. can read) the inner id values of |
---|
822 | /// the items stored in the graph. This map can be inverted with its member |
---|
823 | /// class \c InverseMap. |
---|
824 | /// |
---|
825 | template <typename _Graph, typename _Item> |
---|
826 | class IdMap { |
---|
827 | public: |
---|
828 | typedef _Graph Graph; |
---|
829 | typedef int Value; |
---|
830 | typedef _Item Item; |
---|
831 | typedef _Item Key; |
---|
832 | |
---|
833 | /// \brief Constructor. |
---|
834 | /// |
---|
835 | /// Constructor for creating id map. |
---|
836 | IdMap(const Graph& _graph) : graph(&_graph) {} |
---|
837 | |
---|
838 | /// \brief Gives back the \e id of the item. |
---|
839 | /// |
---|
840 | /// Gives back the immutable and unique \e id of the map. |
---|
841 | int operator[](const Item& item) const { return graph->id(item);} |
---|
842 | |
---|
843 | |
---|
844 | private: |
---|
845 | const Graph* graph; |
---|
846 | |
---|
847 | public: |
---|
848 | |
---|
849 | /// \brief The class represents the inverse of its owner (IdMap). |
---|
850 | /// |
---|
851 | /// The class represents the inverse of its owner (IdMap). |
---|
852 | /// \see inverse() |
---|
853 | class InverseMap { |
---|
854 | public: |
---|
855 | |
---|
856 | /// \brief Constructor. |
---|
857 | /// |
---|
858 | /// Constructor for creating an id-to-item map. |
---|
859 | InverseMap(const Graph& _graph) : graph(&_graph) {} |
---|
860 | |
---|
861 | /// \brief Constructor. |
---|
862 | /// |
---|
863 | /// Constructor for creating an id-to-item map. |
---|
864 | InverseMap(const IdMap& idMap) : graph(idMap.graph) {} |
---|
865 | |
---|
866 | /// \brief Gives back the given item from its id. |
---|
867 | /// |
---|
868 | /// Gives back the given item from its id. |
---|
869 | /// |
---|
870 | Item operator[](int id) const { return graph->fromId(id, Item());} |
---|
871 | private: |
---|
872 | const Graph* graph; |
---|
873 | }; |
---|
874 | |
---|
875 | /// \brief Gives back the inverse of the map. |
---|
876 | /// |
---|
877 | /// Gives back the inverse of the IdMap. |
---|
878 | InverseMap inverse() const { return InverseMap(*graph);} |
---|
879 | |
---|
880 | }; |
---|
881 | |
---|
882 | |
---|
883 | /// \brief General invertable graph-map type. |
---|
884 | |
---|
885 | /// This type provides simple invertable graph-maps. |
---|
886 | /// The InvertableMap wraps an arbitrary ReadWriteMap |
---|
887 | /// and if a key is set to a new value then store it |
---|
888 | /// in the inverse map. |
---|
889 | /// \param _Graph The graph type. |
---|
890 | /// \param _Item The item type of the graph. |
---|
891 | /// \param _Value The value type of the map. |
---|
892 | #ifndef DOXYGEN |
---|
893 | /// \param _Map A ReadWriteMap mapping from the item type to integer. |
---|
894 | template < |
---|
895 | typename _Graph, typename _Item, typename _Value, typename _Map |
---|
896 | = typename ItemSetTraits<_Graph, _Item>::template Map<_Value>::Parent |
---|
897 | > |
---|
898 | #else |
---|
899 | template <typename _Graph, typename _Item, typename _Value> |
---|
900 | #endif |
---|
901 | class InvertableMap : protected _Map { |
---|
902 | |
---|
903 | public: |
---|
904 | |
---|
905 | typedef _Map Map; |
---|
906 | typedef _Graph Graph; |
---|
907 | |
---|
908 | /// The key type of InvertableMap (Node, Edge, UndirEdge). |
---|
909 | typedef typename _Map::Key Key; |
---|
910 | /// The value type of the InvertableMap. |
---|
911 | typedef typename _Map::Value Value; |
---|
912 | |
---|
913 | /// \brief Constructor. |
---|
914 | /// |
---|
915 | /// Construct a new InvertableMap for the graph. |
---|
916 | /// |
---|
917 | InvertableMap(const Graph& graph) : Map(graph) {} |
---|
918 | |
---|
919 | /// \brief The setter function of the map. |
---|
920 | /// |
---|
921 | /// Sets the mapped value. |
---|
922 | void set(const Key& key, const Value& val) { |
---|
923 | Value oldval = Map::operator[](key); |
---|
924 | typename Container::iterator it = invMap.find(oldval); |
---|
925 | if (it != invMap.end() && it->second == key) { |
---|
926 | invMap.erase(it); |
---|
927 | } |
---|
928 | invMap.insert(make_pair(val, key)); |
---|
929 | Map::set(key, val); |
---|
930 | } |
---|
931 | |
---|
932 | /// \brief The getter function of the map. |
---|
933 | /// |
---|
934 | /// It gives back the value associated with the key. |
---|
935 | Value operator[](const Key& key) const { |
---|
936 | return Map::operator[](key); |
---|
937 | } |
---|
938 | |
---|
939 | protected: |
---|
940 | |
---|
941 | /// \brief Erase the key from the map. |
---|
942 | /// |
---|
943 | /// Erase the key to the map. It is called by the |
---|
944 | /// \c AlterationNotifier. |
---|
945 | virtual void erase(const Key& key) { |
---|
946 | Value val = Map::operator[](key); |
---|
947 | typename Container::iterator it = invMap.find(val); |
---|
948 | if (it != invMap.end() && it->second == key) { |
---|
949 | invMap.erase(it); |
---|
950 | } |
---|
951 | Map::erase(key); |
---|
952 | } |
---|
953 | |
---|
954 | /// \brief Erase more keys from the map. |
---|
955 | /// |
---|
956 | /// Erase more keys from the map. It is called by the |
---|
957 | /// \c AlterationNotifier. |
---|
958 | virtual void erase(const std::vector<Key>& keys) { |
---|
959 | for (int i = 0; i < (int)keys.size(); ++i) { |
---|
960 | Value val = Map::operator[](keys[i]); |
---|
961 | typename Container::iterator it = invMap.find(val); |
---|
962 | if (it != invMap.end() && it->second == keys[i]) { |
---|
963 | invMap.erase(it); |
---|
964 | } |
---|
965 | } |
---|
966 | Map::erase(keys); |
---|
967 | } |
---|
968 | |
---|
969 | /// \brief Clear the keys from the map and inverse map. |
---|
970 | /// |
---|
971 | /// Clear the keys from the map and inverse map. It is called by the |
---|
972 | /// \c AlterationNotifier. |
---|
973 | virtual void clear() { |
---|
974 | invMap.clear(); |
---|
975 | Map::clear(); |
---|
976 | } |
---|
977 | |
---|
978 | private: |
---|
979 | |
---|
980 | typedef std::map<Value, Key> Container; |
---|
981 | Container invMap; |
---|
982 | |
---|
983 | public: |
---|
984 | |
---|
985 | /// \brief The inverse map type. |
---|
986 | /// |
---|
987 | /// The inverse of this map. The subscript operator of the map |
---|
988 | /// gives back always the item what was last assigned to the value. |
---|
989 | class InverseMap { |
---|
990 | public: |
---|
991 | /// \brief Constructor of the InverseMap. |
---|
992 | /// |
---|
993 | /// Constructor of the InverseMap. |
---|
994 | InverseMap(const InvertableMap& _inverted) : inverted(_inverted) {} |
---|
995 | |
---|
996 | /// The value type of the InverseMap. |
---|
997 | typedef typename InvertableMap::Key Value; |
---|
998 | /// The key type of the InverseMap. |
---|
999 | typedef typename InvertableMap::Value Key; |
---|
1000 | |
---|
1001 | /// \brief Subscript operator. |
---|
1002 | /// |
---|
1003 | /// Subscript operator. It gives back always the item |
---|
1004 | /// what was last assigned to the value. |
---|
1005 | Value operator[](const Key& key) const { |
---|
1006 | typename Container::const_iterator it = inverted.invMap.find(key); |
---|
1007 | return it->second; |
---|
1008 | } |
---|
1009 | |
---|
1010 | private: |
---|
1011 | const InvertableMap& inverted; |
---|
1012 | }; |
---|
1013 | |
---|
1014 | /// \brief It gives back the just readeable inverse map. |
---|
1015 | /// |
---|
1016 | /// It gives back the just readeable inverse map. |
---|
1017 | InverseMap inverse() const { |
---|
1018 | return InverseMap(*this); |
---|
1019 | } |
---|
1020 | |
---|
1021 | |
---|
1022 | |
---|
1023 | }; |
---|
1024 | |
---|
1025 | /// \brief Provides a mutable, continuous and unique descriptor for each |
---|
1026 | /// item in the graph. |
---|
1027 | /// |
---|
1028 | /// The DescriptorMap class provides a unique and continuous (but mutable) |
---|
1029 | /// descriptor (id) for each item of the same type (e.g. node) in the |
---|
1030 | /// graph. This id is <ul><li>\b unique: different items (nodes) get |
---|
1031 | /// different ids <li>\b continuous: the range of the ids is the set of |
---|
1032 | /// integers between 0 and \c n-1, where \c n is the number of the items of |
---|
1033 | /// this type (e.g. nodes) (so the id of a node can change if you delete an |
---|
1034 | /// other node, i.e. this id is mutable). </ul> This map can be inverted |
---|
1035 | /// with its member class \c InverseMap. |
---|
1036 | /// |
---|
1037 | /// \param _Graph The graph class the \c DescriptorMap belongs to. |
---|
1038 | /// \param _Item The Item is the Key of the Map. It may be Node, Edge or |
---|
1039 | /// UndirEdge. |
---|
1040 | #ifndef DOXYGEN |
---|
1041 | /// \param _Map A ReadWriteMap mapping from the item type to integer. |
---|
1042 | template < |
---|
1043 | typename _Graph, typename _Item, typename _Map |
---|
1044 | = typename ItemSetTraits<_Graph, _Item>::template Map<int>::Parent |
---|
1045 | > |
---|
1046 | #else |
---|
1047 | template <typename _Graph, typename _Item> |
---|
1048 | #endif |
---|
1049 | class DescriptorMap : protected _Map { |
---|
1050 | |
---|
1051 | typedef _Item Item; |
---|
1052 | typedef _Map Map; |
---|
1053 | |
---|
1054 | public: |
---|
1055 | /// The graph class of DescriptorMap. |
---|
1056 | typedef _Graph Graph; |
---|
1057 | |
---|
1058 | /// The key type of DescriptorMap (Node, Edge, UndirEdge). |
---|
1059 | typedef typename _Map::Key Key; |
---|
1060 | /// The value type of DescriptorMap. |
---|
1061 | typedef typename _Map::Value Value; |
---|
1062 | |
---|
1063 | /// \brief Constructor. |
---|
1064 | /// |
---|
1065 | /// Constructor for descriptor map. |
---|
1066 | DescriptorMap(const Graph& _graph) : Map(_graph) { |
---|
1067 | build(); |
---|
1068 | } |
---|
1069 | |
---|
1070 | protected: |
---|
1071 | |
---|
1072 | /// \brief Add a new key to the map. |
---|
1073 | /// |
---|
1074 | /// Add a new key to the map. It is called by the |
---|
1075 | /// \c AlterationNotifier. |
---|
1076 | virtual void add(const Item& item) { |
---|
1077 | Map::add(item); |
---|
1078 | Map::set(item, invMap.size()); |
---|
1079 | invMap.push_back(item); |
---|
1080 | } |
---|
1081 | |
---|
1082 | /// \brief Add more new keys to the map. |
---|
1083 | /// |
---|
1084 | /// Add more new keys to the map. It is called by the |
---|
1085 | /// \c AlterationNotifier. |
---|
1086 | virtual void add(const std::vector<Item>& items) { |
---|
1087 | Map::add(items); |
---|
1088 | for (int i = 0; i < (int)items.size(); ++i) { |
---|
1089 | Map::set(items[i], invMap.size()); |
---|
1090 | invMap.push_back(items[i]); |
---|
1091 | } |
---|
1092 | } |
---|
1093 | |
---|
1094 | /// \brief Erase the key from the map. |
---|
1095 | /// |
---|
1096 | /// Erase the key from the map. It is called by the |
---|
1097 | /// \c AlterationNotifier. |
---|
1098 | virtual void erase(const Item& item) { |
---|
1099 | Map::set(invMap.back(), Map::operator[](item)); |
---|
1100 | invMap[Map::operator[](item)] = invMap.back(); |
---|
1101 | invMap.pop_back(); |
---|
1102 | Map::erase(item); |
---|
1103 | } |
---|
1104 | |
---|
1105 | /// \brief Erase more keys from the map. |
---|
1106 | /// |
---|
1107 | /// Erase more keys from the map. It is called by the |
---|
1108 | /// \c AlterationNotifier. |
---|
1109 | virtual void erase(const std::vector<Item>& items) { |
---|
1110 | for (int i = 0; i < (int)items.size(); ++i) { |
---|
1111 | Map::set(invMap.back(), Map::operator[](items[i])); |
---|
1112 | invMap[Map::operator[](items[i])] = invMap.back(); |
---|
1113 | invMap.pop_back(); |
---|
1114 | } |
---|
1115 | Map::erase(items); |
---|
1116 | } |
---|
1117 | |
---|
1118 | /// \brief Build the unique map. |
---|
1119 | /// |
---|
1120 | /// Build the unique map. It is called by the |
---|
1121 | /// \c AlterationNotifier. |
---|
1122 | virtual void build() { |
---|
1123 | Map::build(); |
---|
1124 | Item it; |
---|
1125 | const typename Map::Graph* graph = Map::getGraph(); |
---|
1126 | for (graph->first(it); it != INVALID; graph->next(it)) { |
---|
1127 | Map::set(it, invMap.size()); |
---|
1128 | invMap.push_back(it); |
---|
1129 | } |
---|
1130 | } |
---|
1131 | |
---|
1132 | /// \brief Clear the keys from the map. |
---|
1133 | /// |
---|
1134 | /// Clear the keys from the map. It is called by the |
---|
1135 | /// \c AlterationNotifier. |
---|
1136 | virtual void clear() { |
---|
1137 | invMap.clear(); |
---|
1138 | Map::clear(); |
---|
1139 | } |
---|
1140 | |
---|
1141 | public: |
---|
1142 | |
---|
1143 | /// \brief Swaps the position of the two items in the map. |
---|
1144 | /// |
---|
1145 | /// Swaps the position of the two items in the map. |
---|
1146 | void swap(const Item& p, const Item& q) { |
---|
1147 | int pi = Map::operator[](p); |
---|
1148 | int qi = Map::operator[](q); |
---|
1149 | Map::set(p, qi); |
---|
1150 | invMap[qi] = p; |
---|
1151 | Map::set(q, pi); |
---|
1152 | invMap[pi] = q; |
---|
1153 | } |
---|
1154 | |
---|
1155 | /// \brief Gives back the \e descriptor of the item. |
---|
1156 | /// |
---|
1157 | /// Gives back the mutable and unique \e descriptor of the map. |
---|
1158 | int operator[](const Item& item) const { |
---|
1159 | return Map::operator[](item); |
---|
1160 | } |
---|
1161 | |
---|
1162 | private: |
---|
1163 | |
---|
1164 | typedef std::vector<Item> Container; |
---|
1165 | Container invMap; |
---|
1166 | |
---|
1167 | public: |
---|
1168 | /// \brief The inverse map type of DescriptorMap. |
---|
1169 | /// |
---|
1170 | /// The inverse map type of DescriptorMap. |
---|
1171 | class InverseMap { |
---|
1172 | public: |
---|
1173 | /// \brief Constructor of the InverseMap. |
---|
1174 | /// |
---|
1175 | /// Constructor of the InverseMap. |
---|
1176 | InverseMap(const DescriptorMap& _inverted) |
---|
1177 | : inverted(_inverted) {} |
---|
1178 | |
---|
1179 | |
---|
1180 | /// The value type of the InverseMap. |
---|
1181 | typedef typename DescriptorMap::Key Value; |
---|
1182 | /// The key type of the InverseMap. |
---|
1183 | typedef typename DescriptorMap::Value Key; |
---|
1184 | |
---|
1185 | /// \brief Subscript operator. |
---|
1186 | /// |
---|
1187 | /// Subscript operator. It gives back the item |
---|
1188 | /// that the descriptor belongs to currently. |
---|
1189 | Value operator[](const Key& key) const { |
---|
1190 | return inverted.invMap[key]; |
---|
1191 | } |
---|
1192 | |
---|
1193 | /// \brief Size of the map. |
---|
1194 | /// |
---|
1195 | /// Returns the size of the map. |
---|
1196 | int size() const { |
---|
1197 | return inverted.invMap.size(); |
---|
1198 | } |
---|
1199 | |
---|
1200 | private: |
---|
1201 | const DescriptorMap& inverted; |
---|
1202 | }; |
---|
1203 | |
---|
1204 | /// \brief Gives back the inverse of the map. |
---|
1205 | /// |
---|
1206 | /// Gives back the inverse of the map. |
---|
1207 | const InverseMap inverse() const { |
---|
1208 | return InverseMap(*this); |
---|
1209 | } |
---|
1210 | }; |
---|
1211 | |
---|
1212 | /// \brief Returns the source of the given edge. |
---|
1213 | /// |
---|
1214 | /// The SourceMap gives back the source Node of the given edge. |
---|
1215 | /// \author Balazs Dezso |
---|
1216 | template <typename Graph> |
---|
1217 | class SourceMap { |
---|
1218 | public: |
---|
1219 | |
---|
1220 | typedef typename Graph::Node Value; |
---|
1221 | typedef typename Graph::Edge Key; |
---|
1222 | |
---|
1223 | /// \brief Constructor |
---|
1224 | /// |
---|
1225 | /// Constructor |
---|
1226 | /// \param _graph The graph that the map belongs to. |
---|
1227 | SourceMap(const Graph& _graph) : graph(_graph) {} |
---|
1228 | |
---|
1229 | /// \brief The subscript operator. |
---|
1230 | /// |
---|
1231 | /// The subscript operator. |
---|
1232 | /// \param edge The edge |
---|
1233 | /// \return The source of the edge |
---|
1234 | Value operator[](const Key& edge) const { |
---|
1235 | return graph.source(edge); |
---|
1236 | } |
---|
1237 | |
---|
1238 | private: |
---|
1239 | const Graph& graph; |
---|
1240 | }; |
---|
1241 | |
---|
1242 | /// \brief Returns a \ref SourceMap class |
---|
1243 | /// |
---|
1244 | /// This function just returns an \ref SourceMap class. |
---|
1245 | /// \relates SourceMap |
---|
1246 | template <typename Graph> |
---|
1247 | inline SourceMap<Graph> sourceMap(const Graph& graph) { |
---|
1248 | return SourceMap<Graph>(graph); |
---|
1249 | } |
---|
1250 | |
---|
1251 | /// \brief Returns the target of the given edge. |
---|
1252 | /// |
---|
1253 | /// The TargetMap gives back the target Node of the given edge. |
---|
1254 | /// \author Balazs Dezso |
---|
1255 | template <typename Graph> |
---|
1256 | class TargetMap { |
---|
1257 | public: |
---|
1258 | |
---|
1259 | typedef typename Graph::Node Value; |
---|
1260 | typedef typename Graph::Edge Key; |
---|
1261 | |
---|
1262 | /// \brief Constructor |
---|
1263 | /// |
---|
1264 | /// Constructor |
---|
1265 | /// \param _graph The graph that the map belongs to. |
---|
1266 | TargetMap(const Graph& _graph) : graph(_graph) {} |
---|
1267 | |
---|
1268 | /// \brief The subscript operator. |
---|
1269 | /// |
---|
1270 | /// The subscript operator. |
---|
1271 | /// \param e The edge |
---|
1272 | /// \return The target of the edge |
---|
1273 | Value operator[](const Key& e) const { |
---|
1274 | return graph.target(e); |
---|
1275 | } |
---|
1276 | |
---|
1277 | private: |
---|
1278 | const Graph& graph; |
---|
1279 | }; |
---|
1280 | |
---|
1281 | /// \brief Returns a \ref TargetMap class |
---|
1282 | /// |
---|
1283 | /// This function just returns a \ref TargetMap class. |
---|
1284 | /// \relates TargetMap |
---|
1285 | template <typename Graph> |
---|
1286 | inline TargetMap<Graph> targetMap(const Graph& graph) { |
---|
1287 | return TargetMap<Graph>(graph); |
---|
1288 | } |
---|
1289 | |
---|
1290 | /// \brief Returns the "forward" directed edge view of an undirected edge. |
---|
1291 | /// |
---|
1292 | /// Returns the "forward" directed edge view of an undirected edge. |
---|
1293 | /// \author Balazs Dezso |
---|
1294 | template <typename Graph> |
---|
1295 | class ForwardMap { |
---|
1296 | public: |
---|
1297 | |
---|
1298 | typedef typename Graph::Edge Value; |
---|
1299 | typedef typename Graph::UndirEdge Key; |
---|
1300 | |
---|
1301 | /// \brief Constructor |
---|
1302 | /// |
---|
1303 | /// Constructor |
---|
1304 | /// \param _graph The graph that the map belongs to. |
---|
1305 | ForwardMap(const Graph& _graph) : graph(_graph) {} |
---|
1306 | |
---|
1307 | /// \brief The subscript operator. |
---|
1308 | /// |
---|
1309 | /// The subscript operator. |
---|
1310 | /// \param key An undirected edge |
---|
1311 | /// \return The "forward" directed edge view of undirected edge |
---|
1312 | Value operator[](const Key& key) const { |
---|
1313 | return graph.direct(key, true); |
---|
1314 | } |
---|
1315 | |
---|
1316 | private: |
---|
1317 | const Graph& graph; |
---|
1318 | }; |
---|
1319 | |
---|
1320 | /// \brief Returns a \ref ForwardMap class |
---|
1321 | /// |
---|
1322 | /// This function just returns an \ref ForwardMap class. |
---|
1323 | /// \relates ForwardMap |
---|
1324 | template <typename Graph> |
---|
1325 | inline ForwardMap<Graph> forwardMap(const Graph& graph) { |
---|
1326 | return ForwardMap<Graph>(graph); |
---|
1327 | } |
---|
1328 | |
---|
1329 | /// \brief Returns the "backward" directed edge view of an undirected edge. |
---|
1330 | /// |
---|
1331 | /// Returns the "backward" directed edge view of an undirected edge. |
---|
1332 | /// \author Balazs Dezso |
---|
1333 | template <typename Graph> |
---|
1334 | class BackwardMap { |
---|
1335 | public: |
---|
1336 | |
---|
1337 | typedef typename Graph::Edge Value; |
---|
1338 | typedef typename Graph::UndirEdge Key; |
---|
1339 | |
---|
1340 | /// \brief Constructor |
---|
1341 | /// |
---|
1342 | /// Constructor |
---|
1343 | /// \param _graph The graph that the map belongs to. |
---|
1344 | BackwardMap(const Graph& _graph) : graph(_graph) {} |
---|
1345 | |
---|
1346 | /// \brief The subscript operator. |
---|
1347 | /// |
---|
1348 | /// The subscript operator. |
---|
1349 | /// \param key An undirected edge |
---|
1350 | /// \return The "backward" directed edge view of undirected edge |
---|
1351 | Value operator[](const Key& key) const { |
---|
1352 | return graph.direct(key, false); |
---|
1353 | } |
---|
1354 | |
---|
1355 | private: |
---|
1356 | const Graph& graph; |
---|
1357 | }; |
---|
1358 | |
---|
1359 | /// \brief Returns a \ref BackwardMap class |
---|
1360 | |
---|
1361 | /// This function just returns a \ref BackwardMap class. |
---|
1362 | /// \relates BackwardMap |
---|
1363 | template <typename Graph> |
---|
1364 | inline BackwardMap<Graph> backwardMap(const Graph& graph) { |
---|
1365 | return BackwardMap<Graph>(graph); |
---|
1366 | } |
---|
1367 | |
---|
1368 | /// \brief Potential difference map |
---|
1369 | /// |
---|
1370 | /// If there is an potential map on the nodes then we |
---|
1371 | /// can get an edge map as we get the substraction of the |
---|
1372 | /// values of the target and source. |
---|
1373 | template <typename Graph, typename NodeMap> |
---|
1374 | class PotentialDifferenceMap { |
---|
1375 | public: |
---|
1376 | typedef typename Graph::Edge Key; |
---|
1377 | typedef typename NodeMap::Value Value; |
---|
1378 | |
---|
1379 | /// \brief Constructor |
---|
1380 | /// |
---|
1381 | /// Contructor of the map |
---|
1382 | PotentialDifferenceMap(const Graph& _graph, const NodeMap& _potential) |
---|
1383 | : graph(_graph), potential(_potential) {} |
---|
1384 | |
---|
1385 | /// \brief Const subscription operator |
---|
1386 | /// |
---|
1387 | /// Const subscription operator |
---|
1388 | Value operator[](const Key& edge) const { |
---|
1389 | return potential[graph.target(edge)] - potential[graph.source(edge)]; |
---|
1390 | } |
---|
1391 | |
---|
1392 | private: |
---|
1393 | const Graph& graph; |
---|
1394 | const NodeMap& potential; |
---|
1395 | }; |
---|
1396 | |
---|
1397 | /// \brief Just returns a PotentialDifferenceMap |
---|
1398 | /// |
---|
1399 | /// Just returns a PotentialDifferenceMap |
---|
1400 | /// \relates PotentialDifferenceMap |
---|
1401 | template <typename Graph, typename NodeMap> |
---|
1402 | PotentialDifferenceMap<Graph, NodeMap> |
---|
1403 | potentialDifferenceMap(const Graph& graph, const NodeMap& potential) { |
---|
1404 | return PotentialDifferenceMap<Graph, NodeMap>(graph, potential); |
---|
1405 | } |
---|
1406 | |
---|
1407 | /// \brief Map of the node in-degrees. |
---|
1408 | /// |
---|
1409 | /// This map returns the in-degree of a node. Once it is constructed, |
---|
1410 | /// the degrees are stored in a standard NodeMap, so each query is done |
---|
1411 | /// in constant time. On the other hand, the values are updated automatically |
---|
1412 | /// whenever the graph changes. |
---|
1413 | /// |
---|
1414 | /// \warning Besides addNode() and addEdge(), a graph structure may provide |
---|
1415 | /// alternative ways to modify the graph. The correct behavior of InDegMap |
---|
1416 | /// is not guarantied if these additional features are used. For example |
---|
1417 | /// the functions \ref ListGraph::changeSource() "changeSource()", |
---|
1418 | /// \ref ListGraph::changeTarget() "changeTarget()" and |
---|
1419 | /// \ref ListGraph::reverseEdge() "reverseEdge()" |
---|
1420 | /// of \ref ListGraph will \e not update the degree values correctly. |
---|
1421 | /// |
---|
1422 | /// \sa OutDegMap |
---|
1423 | |
---|
1424 | template <typename _Graph> |
---|
1425 | class InDegMap |
---|
1426 | : protected AlterationNotifier<typename _Graph::Edge>::ObserverBase { |
---|
1427 | |
---|
1428 | public: |
---|
1429 | |
---|
1430 | typedef _Graph Graph; |
---|
1431 | typedef int Value; |
---|
1432 | typedef typename Graph::Node Key; |
---|
1433 | |
---|
1434 | private: |
---|
1435 | |
---|
1436 | class AutoNodeMap : public Graph::template NodeMap<int> { |
---|
1437 | public: |
---|
1438 | |
---|
1439 | typedef typename Graph::template NodeMap<int> Parent; |
---|
1440 | |
---|
1441 | typedef typename Parent::Key Key; |
---|
1442 | typedef typename Parent::Value Value; |
---|
1443 | |
---|
1444 | AutoNodeMap(const Graph& graph) : Parent(graph, 0) {} |
---|
1445 | |
---|
1446 | virtual void add(const Key& key) { |
---|
1447 | Parent::add(key); |
---|
1448 | Parent::set(key, 0); |
---|
1449 | } |
---|
1450 | virtual void add(const std::vector<Key>& keys) { |
---|
1451 | Parent::add(keys); |
---|
1452 | for (int i = 0; i < (int)keys.size(); ++i) { |
---|
1453 | Parent::set(keys[i], 0); |
---|
1454 | } |
---|
1455 | } |
---|
1456 | }; |
---|
1457 | |
---|
1458 | public: |
---|
1459 | |
---|
1460 | /// \brief Constructor. |
---|
1461 | /// |
---|
1462 | /// Constructor for creating in-degree map. |
---|
1463 | InDegMap(const Graph& _graph) : graph(_graph), deg(_graph) { |
---|
1464 | AlterationNotifier<typename _Graph::Edge> |
---|
1465 | ::ObserverBase::attach(graph.getNotifier(typename _Graph::Edge())); |
---|
1466 | |
---|
1467 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1468 | deg[it] = countInEdges(graph, it); |
---|
1469 | } |
---|
1470 | } |
---|
1471 | |
---|
1472 | virtual ~InDegMap() { |
---|
1473 | AlterationNotifier<typename _Graph::Edge>:: |
---|
1474 | ObserverBase::detach(); |
---|
1475 | } |
---|
1476 | |
---|
1477 | /// Gives back the in-degree of a Node. |
---|
1478 | int operator[](const Key& key) const { |
---|
1479 | return deg[key]; |
---|
1480 | } |
---|
1481 | |
---|
1482 | protected: |
---|
1483 | |
---|
1484 | typedef typename Graph::Edge Edge; |
---|
1485 | |
---|
1486 | virtual void add(const Edge& edge) { |
---|
1487 | ++deg[graph.target(edge)]; |
---|
1488 | } |
---|
1489 | |
---|
1490 | virtual void erase(const Edge& edge) { |
---|
1491 | --deg[graph.target(edge)]; |
---|
1492 | } |
---|
1493 | |
---|
1494 | virtual void build() { |
---|
1495 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1496 | deg[it] = countInEdges(graph, it); |
---|
1497 | } |
---|
1498 | } |
---|
1499 | |
---|
1500 | virtual void clear() { |
---|
1501 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1502 | deg[it] = 0; |
---|
1503 | } |
---|
1504 | } |
---|
1505 | private: |
---|
1506 | |
---|
1507 | const _Graph& graph; |
---|
1508 | AutoNodeMap deg; |
---|
1509 | }; |
---|
1510 | |
---|
1511 | /// \brief Map of the node out-degrees. |
---|
1512 | /// |
---|
1513 | /// This map returns the out-degree of a node. Once it is constructed, |
---|
1514 | /// the degrees are stored in a standard NodeMap, so each query is done |
---|
1515 | /// in constant time. On the other hand, the values are updated automatically |
---|
1516 | /// whenever the graph changes. |
---|
1517 | /// |
---|
1518 | /// \warning Besides addNode() and addEdge(), a graph structure may provide |
---|
1519 | /// alternative ways to modify the graph. The correct behavior of OutDegMap |
---|
1520 | /// is not guarantied if these additional features are used. For example |
---|
1521 | /// the functions \ref ListGraph::changeSource() "changeSource()", |
---|
1522 | /// \ref ListGraph::changeTarget() "changeTarget()" and |
---|
1523 | /// \ref ListGraph::reverseEdge() "reverseEdge()" |
---|
1524 | /// of \ref ListGraph will \e not update the degree values correctly. |
---|
1525 | /// |
---|
1526 | /// \sa InDegMap |
---|
1527 | |
---|
1528 | template <typename _Graph> |
---|
1529 | class OutDegMap |
---|
1530 | : protected AlterationNotifier<typename _Graph::Edge>::ObserverBase { |
---|
1531 | |
---|
1532 | public: |
---|
1533 | |
---|
1534 | typedef _Graph Graph; |
---|
1535 | typedef int Value; |
---|
1536 | typedef typename Graph::Node Key; |
---|
1537 | |
---|
1538 | private: |
---|
1539 | |
---|
1540 | class AutoNodeMap : public Graph::template NodeMap<int> { |
---|
1541 | public: |
---|
1542 | |
---|
1543 | typedef typename Graph::template NodeMap<int> Parent; |
---|
1544 | |
---|
1545 | typedef typename Parent::Key Key; |
---|
1546 | typedef typename Parent::Value Value; |
---|
1547 | |
---|
1548 | AutoNodeMap(const Graph& graph) : Parent(graph, 0) {} |
---|
1549 | |
---|
1550 | virtual void add(const Key& key) { |
---|
1551 | Parent::add(key); |
---|
1552 | Parent::set(key, 0); |
---|
1553 | } |
---|
1554 | virtual void add(const std::vector<Key>& keys) { |
---|
1555 | Parent::add(keys); |
---|
1556 | for (int i = 0; i < (int)keys.size(); ++i) { |
---|
1557 | Parent::set(keys[i], 0); |
---|
1558 | } |
---|
1559 | } |
---|
1560 | }; |
---|
1561 | |
---|
1562 | public: |
---|
1563 | |
---|
1564 | /// \brief Constructor. |
---|
1565 | /// |
---|
1566 | /// Constructor for creating out-degree map. |
---|
1567 | OutDegMap(const Graph& _graph) : graph(_graph), deg(_graph) { |
---|
1568 | AlterationNotifier<typename _Graph::Edge> |
---|
1569 | ::ObserverBase::attach(graph.getNotifier(typename _Graph::Edge())); |
---|
1570 | |
---|
1571 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1572 | deg[it] = countOutEdges(graph, it); |
---|
1573 | } |
---|
1574 | } |
---|
1575 | |
---|
1576 | virtual ~OutDegMap() { |
---|
1577 | AlterationNotifier<typename _Graph::Edge>:: |
---|
1578 | ObserverBase::detach(); |
---|
1579 | } |
---|
1580 | |
---|
1581 | /// Gives back the in-degree of a Node. |
---|
1582 | int operator[](const Key& key) const { |
---|
1583 | return deg[key]; |
---|
1584 | } |
---|
1585 | |
---|
1586 | protected: |
---|
1587 | |
---|
1588 | typedef typename Graph::Edge Edge; |
---|
1589 | |
---|
1590 | virtual void add(const Edge& edge) { |
---|
1591 | ++deg[graph.source(edge)]; |
---|
1592 | } |
---|
1593 | |
---|
1594 | virtual void erase(const Edge& edge) { |
---|
1595 | --deg[graph.source(edge)]; |
---|
1596 | } |
---|
1597 | |
---|
1598 | virtual void build() { |
---|
1599 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1600 | deg[it] = countOutEdges(graph, it); |
---|
1601 | } |
---|
1602 | } |
---|
1603 | |
---|
1604 | virtual void clear() { |
---|
1605 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1606 | deg[it] = 0; |
---|
1607 | } |
---|
1608 | } |
---|
1609 | private: |
---|
1610 | |
---|
1611 | const _Graph& graph; |
---|
1612 | AutoNodeMap deg; |
---|
1613 | }; |
---|
1614 | |
---|
1615 | |
---|
1616 | /// @} |
---|
1617 | |
---|
1618 | } //END OF NAMESPACE LEMON |
---|
1619 | |
---|
1620 | #endif |
---|