1 | /* -*- C++ -*- |
---|
2 | * lemon/matrix_maps.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_MATRIX_MAPS_H |
---|
18 | #define LEMON_MATRIX_MAPS_H |
---|
19 | |
---|
20 | |
---|
21 | #include <vector> |
---|
22 | #include <lemon/utility.h> |
---|
23 | #include <lemon/maps.h> |
---|
24 | |
---|
25 | |
---|
26 | /// \file |
---|
27 | /// \ingroup maps |
---|
28 | /// \brief Maps indexed with pairs of items. |
---|
29 | /// |
---|
30 | /// \todo This file has the same name as the concept file in concept/, |
---|
31 | /// and this is not easily detectable in docs... |
---|
32 | namespace lemon { |
---|
33 | |
---|
34 | /// \brief Map for the coloumn view of the matrix |
---|
35 | /// |
---|
36 | /// Map for the coloumn view of the matrix. |
---|
37 | template <typename _MatrixMap> |
---|
38 | class MatrixColMap : public MapTraits<_MatrixMap> { |
---|
39 | public: |
---|
40 | typedef _MatrixMap MatrixMap; |
---|
41 | typedef typename MatrixMap::SecondKey Key; |
---|
42 | typedef typename MatrixMap::Value Value; |
---|
43 | |
---|
44 | |
---|
45 | MatrixColMap(MatrixMap& _matrix, typename MatrixMap::FirstKey _col) |
---|
46 | : matrix(_matrix), col(_col) {} |
---|
47 | |
---|
48 | /// \brief Subscription operator |
---|
49 | /// |
---|
50 | /// Subscription operator. |
---|
51 | typename MapTraits<MatrixMap>::ReturnValue |
---|
52 | operator[](Key row) { |
---|
53 | return matrix(col, row); |
---|
54 | } |
---|
55 | |
---|
56 | /// \brief Setter function |
---|
57 | /// |
---|
58 | /// Setter function. |
---|
59 | void set(Key row, const Value& val) { |
---|
60 | matrix.set(col, row, val); |
---|
61 | } |
---|
62 | |
---|
63 | /// \brief Subscription operator |
---|
64 | /// |
---|
65 | /// Subscription operator. |
---|
66 | typename MapTraits<MatrixMap>::ConstReturnValue |
---|
67 | operator[](Key row) const { |
---|
68 | return matrix(col, row); |
---|
69 | } |
---|
70 | |
---|
71 | private: |
---|
72 | MatrixMap& matrix; |
---|
73 | typename MatrixMap::FirstKey col; |
---|
74 | }; |
---|
75 | |
---|
76 | /// \brief Map for the coloumn view of the matrix |
---|
77 | /// |
---|
78 | /// Map for the coloumn view of the matrix. |
---|
79 | template <typename _MatrixMap> |
---|
80 | class ConstMatrixColMap : public MapTraits<_MatrixMap> { |
---|
81 | public: |
---|
82 | typedef _MatrixMap MatrixMap; |
---|
83 | typedef typename MatrixMap::SecondKey Key; |
---|
84 | typedef typename MatrixMap::Value Value; |
---|
85 | |
---|
86 | |
---|
87 | ConstMatrixColMap(const MatrixMap& _matrix, |
---|
88 | typename MatrixMap::FirstKey _col) |
---|
89 | : matrix(_matrix), col(_col) {} |
---|
90 | |
---|
91 | /// \brief Subscription operator |
---|
92 | /// |
---|
93 | /// Subscription operator. |
---|
94 | typename MapTraits<MatrixMap>::ConstReturnValue |
---|
95 | operator[](Key row) const { |
---|
96 | return matrix(col, row); |
---|
97 | } |
---|
98 | |
---|
99 | private: |
---|
100 | const MatrixMap& matrix; |
---|
101 | typename MatrixMap::FirstKey col; |
---|
102 | }; |
---|
103 | |
---|
104 | /// \brief Gives back a coloumn view of the matrix map |
---|
105 | /// |
---|
106 | /// Gives back a coloumn view of the matrix map. |
---|
107 | template <typename MatrixMap> |
---|
108 | MatrixColMap<MatrixMap> matrixColMap(MatrixMap& matrixMap, |
---|
109 | typename MatrixMap::FirstKey col) { |
---|
110 | return MatrixColMap<MatrixMap>(matrixMap, col); |
---|
111 | } |
---|
112 | |
---|
113 | template <typename MatrixMap> |
---|
114 | ConstMatrixColMap<MatrixMap> |
---|
115 | matrixColMap(const MatrixMap& matrixMap, typename MatrixMap::FirstKey col) { |
---|
116 | return ConstMatrixColMap<MatrixMap>(matrixMap, col); |
---|
117 | } |
---|
118 | |
---|
119 | /// \brief Map for the row view of the matrix |
---|
120 | /// |
---|
121 | /// Map for the row view of the matrix. |
---|
122 | template <typename _MatrixMap> |
---|
123 | class MatrixRowMap : public MapTraits<_MatrixMap> { |
---|
124 | public: |
---|
125 | typedef _MatrixMap MatrixMap; |
---|
126 | typedef typename MatrixMap::FirstKey Key; |
---|
127 | typedef typename MatrixMap::Value Value; |
---|
128 | |
---|
129 | MatrixRowMap(MatrixMap& _matrix, typename MatrixMap::SecondKey _row) |
---|
130 | : matrix(_matrix), row(_row) {} |
---|
131 | |
---|
132 | /// \brief Subscription operator |
---|
133 | /// |
---|
134 | /// Subscription operator. |
---|
135 | typename MapTraits<MatrixMap>::ReturnValue |
---|
136 | operator[](Key col) { |
---|
137 | return matrix(col, row); |
---|
138 | } |
---|
139 | |
---|
140 | /// \brief Setter function |
---|
141 | /// |
---|
142 | /// Setter function. |
---|
143 | void set(Key col, const Value& val) { |
---|
144 | matrix.set(col, row, val); |
---|
145 | } |
---|
146 | |
---|
147 | /// \brief Subscription operator |
---|
148 | /// |
---|
149 | /// Subscription operator. |
---|
150 | typename MapTraits<MatrixMap>::ConstReturnValue |
---|
151 | operator[](Key col) const { |
---|
152 | return matrix(col, row); |
---|
153 | } |
---|
154 | |
---|
155 | private: |
---|
156 | MatrixMap& matrix; |
---|
157 | typename MatrixMap::SecondKey row; |
---|
158 | }; |
---|
159 | |
---|
160 | /// \brief Map for the row view of the matrix |
---|
161 | /// |
---|
162 | /// Map for the row view of the matrix. |
---|
163 | template <typename _MatrixMap> |
---|
164 | class ConstMatrixRowMap : public MapTraits<_MatrixMap> { |
---|
165 | public: |
---|
166 | typedef _MatrixMap MatrixMap; |
---|
167 | typedef typename MatrixMap::FirstKey Key; |
---|
168 | typedef typename MatrixMap::Value Value; |
---|
169 | |
---|
170 | ConstMatrixRowMap(const MatrixMap& _matrix, |
---|
171 | typename MatrixMap::SecondKey _row) |
---|
172 | : matrix(_matrix), row(_row) {} |
---|
173 | |
---|
174 | /// \brief Subscription operator |
---|
175 | /// |
---|
176 | /// Subscription operator. |
---|
177 | typename MapTraits<MatrixMap>::ConstReturnValue |
---|
178 | operator[](Key col) const { |
---|
179 | return matrix(col, row); |
---|
180 | } |
---|
181 | |
---|
182 | private: |
---|
183 | const MatrixMap& matrix; |
---|
184 | typename MatrixMap::SecondKey row; |
---|
185 | }; |
---|
186 | |
---|
187 | /// \brief Gives back a row view of the matrix map |
---|
188 | /// |
---|
189 | /// Gives back a row view of the matrix map. |
---|
190 | template <typename MatrixMap> |
---|
191 | MatrixRowMap<MatrixMap> matrixRowMap(MatrixMap& matrixMap, |
---|
192 | typename MatrixMap::SecondKey row) { |
---|
193 | return MatrixRowMap<MatrixMap>(matrixMap, row); |
---|
194 | } |
---|
195 | |
---|
196 | template <typename MatrixMap> |
---|
197 | ConstMatrixRowMap<MatrixMap> |
---|
198 | matrixRowMap(const MatrixMap& matrixMap, typename MatrixMap::SecondKey row) { |
---|
199 | return ConstMatrixRowMap<MatrixMap>(matrixMap, row); |
---|
200 | } |
---|
201 | |
---|
202 | /// \brief Container for store values for each ordered pair of graph items |
---|
203 | /// |
---|
204 | /// This data structure can strore for each pairs of the same item |
---|
205 | /// type a value. It increase the size of the container when the |
---|
206 | /// associated graph modified, so it updated automaticly whenever |
---|
207 | /// it is needed. |
---|
208 | template <typename _Graph, typename _Item, typename _Value> |
---|
209 | class DynamicMatrixMap |
---|
210 | : protected AlterationNotifier<_Item>::ObserverBase { |
---|
211 | public: |
---|
212 | typedef typename AlterationNotifier<_Item>::ObserverBase Parent; |
---|
213 | |
---|
214 | typedef _Graph Graph; |
---|
215 | typedef _Item Key; |
---|
216 | |
---|
217 | typedef _Item FirstKey; |
---|
218 | typedef _Item SecondKey; |
---|
219 | typedef _Value Value; |
---|
220 | |
---|
221 | typedef True ReferenceMapTag; |
---|
222 | |
---|
223 | private: |
---|
224 | |
---|
225 | typedef std::vector<Value> Container; |
---|
226 | |
---|
227 | public: |
---|
228 | |
---|
229 | typedef typename Container::reference Reference; |
---|
230 | typedef typename Container::const_reference ConstReference; |
---|
231 | |
---|
232 | /// \brief Creates an item matrix for the given graph |
---|
233 | /// |
---|
234 | /// Creates an item matrix for the given graph. |
---|
235 | DynamicMatrixMap(const Graph& _graph) |
---|
236 | : graph(_graph), values(size(_graph.maxId(Key()) + 1)) { |
---|
237 | Parent::attach(graph.getNotifier(Key())); |
---|
238 | } |
---|
239 | |
---|
240 | /// \brief Creates an item matrix for the given graph |
---|
241 | /// |
---|
242 | /// Creates an item matrix for the given graph and assigns for each |
---|
243 | /// pairs of keys the given parameter. |
---|
244 | DynamicMatrixMap(const Graph& _graph, const Value& _val) |
---|
245 | : graph(_graph), values(size(_graph.maxId(Key()) + 1), _val) { |
---|
246 | Parent::attach(graph.getNotifier(Key())); |
---|
247 | } |
---|
248 | |
---|
249 | ~DynamicMatrixMap() { |
---|
250 | if (Parent::attached()) { |
---|
251 | Parent::detach(); |
---|
252 | } |
---|
253 | } |
---|
254 | |
---|
255 | /// \brief Gives back the value assigned to the \c first - \c second |
---|
256 | /// ordered pair. |
---|
257 | /// |
---|
258 | /// Gives back the value assigned to the \c first - \c second ordered pair. |
---|
259 | ConstReference operator()(const Key& first, const Key& second) const { |
---|
260 | return values[index(graph.id(first), graph.id(second))]; |
---|
261 | } |
---|
262 | |
---|
263 | /// \brief Gives back the value assigned to the \c first - \c second |
---|
264 | /// ordered pair. |
---|
265 | /// |
---|
266 | /// Gives back the value assigned to the \c first - \c second ordered pair. |
---|
267 | Reference operator()(const Key& first, const Key& second) { |
---|
268 | return values[index(graph.id(first), graph.id(second))]; |
---|
269 | } |
---|
270 | |
---|
271 | /// \brief Setter function for the matrix map. |
---|
272 | /// |
---|
273 | /// Setter function for the matrix map. |
---|
274 | void set(const Key& first, const Key& second, const Value& val) { |
---|
275 | values[index(graph.id(first), graph.id(second))] = val; |
---|
276 | } |
---|
277 | |
---|
278 | protected: |
---|
279 | |
---|
280 | static int index(int i, int j) { |
---|
281 | if (i < j) { |
---|
282 | return j * j + i; |
---|
283 | } else { |
---|
284 | return i * i + i + j; |
---|
285 | } |
---|
286 | } |
---|
287 | |
---|
288 | static int size(int s) { |
---|
289 | return s * s; |
---|
290 | } |
---|
291 | |
---|
292 | virtual void add(const Key& key) { |
---|
293 | if (size(graph.id(key) + 1) >= (int)values.size()) { |
---|
294 | values.resize(size(graph.id(key) + 1)); |
---|
295 | } |
---|
296 | } |
---|
297 | |
---|
298 | virtual void erase(const Key&) {} |
---|
299 | |
---|
300 | virtual void build() { |
---|
301 | values.resize(size(graph.maxId(Key()) + 1)); |
---|
302 | } |
---|
303 | |
---|
304 | virtual void clear() { |
---|
305 | values.clear(); |
---|
306 | } |
---|
307 | |
---|
308 | private: |
---|
309 | const Graph& graph; |
---|
310 | std::vector<Value> values; |
---|
311 | }; |
---|
312 | |
---|
313 | /// \brief Container for store values for each unordered pair of graph items |
---|
314 | /// |
---|
315 | /// This data structure can strore for each pairs of the same item |
---|
316 | /// type a value. It increase the size of the container when the |
---|
317 | /// associated graph modified, so it updated automaticly whenever |
---|
318 | /// it is needed. |
---|
319 | template <typename _Graph, typename _Item, typename _Value> |
---|
320 | class DynamicSymMatrixMap |
---|
321 | : protected AlterationNotifier<_Item>::ObserverBase { |
---|
322 | public: |
---|
323 | typedef typename AlterationNotifier<_Item>::ObserverBase Parent; |
---|
324 | |
---|
325 | typedef _Graph Graph; |
---|
326 | typedef _Item Key; |
---|
327 | |
---|
328 | typedef _Item FirstKey; |
---|
329 | typedef _Item SecondKey; |
---|
330 | typedef _Value Value; |
---|
331 | |
---|
332 | typedef True ReferenceMapTag; |
---|
333 | |
---|
334 | private: |
---|
335 | |
---|
336 | typedef std::vector<Value> Container; |
---|
337 | |
---|
338 | public: |
---|
339 | |
---|
340 | typedef typename Container::reference Reference; |
---|
341 | typedef typename Container::const_reference ConstReference; |
---|
342 | |
---|
343 | /// \brief Creates an item matrix for the given graph |
---|
344 | /// |
---|
345 | /// Creates an item matrix for the given graph. |
---|
346 | DynamicSymMatrixMap(const Graph& _graph) |
---|
347 | : graph(_graph), values(size(_graph.maxId(Key()) + 1)) { |
---|
348 | Parent::attach(graph.getNotifier(Key())); |
---|
349 | } |
---|
350 | |
---|
351 | /// \brief Creates an item matrix for the given graph |
---|
352 | /// |
---|
353 | /// Creates an item matrix for the given graph and assigns for each |
---|
354 | /// pairs of keys the given parameter. |
---|
355 | DynamicSymMatrixMap(const Graph& _graph, const Value& _val) |
---|
356 | : graph(_graph), values(size(_graph.maxId(Key()) + 1), _val) { |
---|
357 | Parent::attach(graph.getNotifier(Key())); |
---|
358 | } |
---|
359 | |
---|
360 | ~DynamicSymMatrixMap() { |
---|
361 | if (Parent::attached()) { |
---|
362 | Parent::detach(); |
---|
363 | } |
---|
364 | } |
---|
365 | |
---|
366 | /// \brief Gives back the value assigned to the \c first - \c second |
---|
367 | /// unordered pair. |
---|
368 | /// |
---|
369 | /// Gives back the value assigned to the \c first - \c second unordered |
---|
370 | /// pair. |
---|
371 | ConstReference operator()(const Key& first, const Key& second) const { |
---|
372 | return values[index(graph.id(first), graph.id(second))]; |
---|
373 | } |
---|
374 | |
---|
375 | /// \brief Gives back the value assigned to the \c first - \c second |
---|
376 | /// unordered pair. |
---|
377 | /// |
---|
378 | /// Gives back the value assigned to the \c first - \c second unordered |
---|
379 | /// pair. |
---|
380 | Reference operator()(const Key& first, const Key& second) { |
---|
381 | return values[index(graph.id(first), graph.id(second))]; |
---|
382 | } |
---|
383 | |
---|
384 | /// \brief Setter function for the matrix map. |
---|
385 | /// |
---|
386 | /// Setter function for the matrix map. |
---|
387 | void set(const Key& first, const Key& second, const Value& val) { |
---|
388 | values[index(graph.id(first), graph.id(second))] = val; |
---|
389 | } |
---|
390 | |
---|
391 | protected: |
---|
392 | |
---|
393 | static int index(int i, int j) { |
---|
394 | if (i < j) { |
---|
395 | return j * (j + 1) / 2 + i; |
---|
396 | } else { |
---|
397 | return i * (i + 1) / 2 + j; |
---|
398 | } |
---|
399 | } |
---|
400 | |
---|
401 | static int size(int s) { |
---|
402 | return s * (s + 1) / 2; |
---|
403 | } |
---|
404 | |
---|
405 | virtual void add(const Key& key) { |
---|
406 | if (size(graph.id(key) + 1) >= (int)values.size()) { |
---|
407 | values.resize(size(graph.id(key) + 1)); |
---|
408 | } |
---|
409 | } |
---|
410 | |
---|
411 | virtual void erase(const Key&) {} |
---|
412 | |
---|
413 | virtual void build() { |
---|
414 | values.resize(size(graph.maxId(Key()) + 1)); |
---|
415 | } |
---|
416 | |
---|
417 | virtual void clear() { |
---|
418 | values.clear(); |
---|
419 | } |
---|
420 | |
---|
421 | private: |
---|
422 | const Graph& graph; |
---|
423 | std::vector<Value> values; |
---|
424 | }; |
---|
425 | |
---|
426 | } |
---|
427 | |
---|
428 | #endif |
---|