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offset.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2002
8  *
9  * Last modified:
10  * $Date: 2010-10-07 07:42:28 +1100 (Thu, 07 Oct 2010) $ by $Author: schulte $
11  * $Revision: 11464 $
12  *
13  * This file is part of Gecode, the generic constraint
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15  * http://www.gecode.org
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37 
38 namespace Gecode { namespace Int {
39 
40  /*
41  * Constructors and initialization
42  *
43  */
48  : DerivedView<IntView>(y), c(d) {}
49 
50 
51  /*
52  * Value access
53  *
54  */
55  forceinline int
56  OffsetView::offset(void) const {
57  return c;
58  }
59  forceinline void
61  c = n;
62  }
63  forceinline int
64  OffsetView::min(void) const {
65  return x.min()+c;
66  }
67  forceinline int
68  OffsetView::max(void) const {
69  return x.max()+c;
70  }
71  forceinline int
72  OffsetView::med(void) const {
73  return x.med()+c;
74  }
75  forceinline int
76  OffsetView::val(void) const {
77  return x.val()+c;
78  }
79 
80  forceinline unsigned int
81  OffsetView::width(void) const {
82  return x.width();
83  }
84  forceinline unsigned int
85  OffsetView::size(void) const {
86  return x.size();
87  }
88  forceinline unsigned int
89  OffsetView::regret_min(void) const {
90  return x.regret_min();
91  }
92  forceinline unsigned int
93  OffsetView::regret_max(void) const {
94  return x.regret_max();
95  }
96 
97  /*
98  * Domain tests
99  *
100  */
101  forceinline bool
102  OffsetView::range(void) const {
103  return x.range();
104  }
105  forceinline bool
106  OffsetView::in(int n) const {
107  return x.in(n-c);
108  }
109  forceinline bool
110  OffsetView::in(double n) const {
111  return x.in(n-c);
112  }
113 
114 
115  /*
116  * Domain update by value
117  *
118  */
120  OffsetView::lq(Space& home, int n) {
121  return x.lq(home,n-c);
122  }
124  OffsetView::lq(Space& home, double n) {
125  return x.lq(home,n-c);
126  }
128  OffsetView::le(Space& home, int n) {
129  return x.le(home,n-c);
130  }
132  OffsetView::le(Space& home, double n) {
133  return x.le(home,n-c);
134  }
136  OffsetView::gq(Space& home, int n) {
137  return x.gq(home,n-c);
138  }
140  OffsetView::gq(Space& home, double n) {
141  return x.gq(home,n-c);
142  }
144  OffsetView::gr(Space& home, int n) {
145  return x.gr(home,n-c);
146  }
148  OffsetView::gr(Space& home, double n) {
149  return x.gr(home,n-c);
150  }
152  OffsetView::nq(Space& home, int n) {
153  return x.nq(home,n-c);
154  }
156  OffsetView::nq(Space& home, double n) {
157  return x.nq(home,n-c);
158  }
160  OffsetView::eq(Space& home, int n) {
161  return x.eq(home,n-c);
162  }
164  OffsetView::eq(Space& home, double n) {
165  return x.eq(home,n-c);
166  }
167 
168 
169  /*
170  * Iterator-based domain update
171  *
172  */
173  template<class I>
175  OffsetView::narrow_r(Space& home, I& i, bool depend) {
176  Iter::Ranges::Offset<I> oi(i,-c);
177  return x.narrow_r(home,oi,depend);
178  }
179  template<class I>
181  OffsetView::inter_r(Space& home, I& i, bool depend) {
182  Iter::Ranges::Offset<I> oi(i,-c);
183  return x.inter_r(home,oi,depend);
184  }
185  template<class I>
187  OffsetView::minus_r(Space& home, I& i, bool depend) {
188  Iter::Ranges::Offset<I> oi(i,-c);
189  return x.minus_r(home,oi,depend);
190  }
191  template<class I>
193  OffsetView::narrow_v(Space& home, I& i, bool depend) {
194  Iter::Values::Offset<I> oi(i,-c);
195  return x.narrow_v(home,oi,depend);
196  }
197  template<class I>
199  OffsetView::inter_v(Space& home, I& i, bool depend) {
200  Iter::Values::Offset<I> oi(i,-c);
201  return x.inter_v(home,oi,depend);
202  }
203  template<class I>
205  OffsetView::minus_v(Space& home, I& i, bool depend) {
206  Iter::Values::Offset<I> oi(i,-c);
207  return x.minus_v(home,oi,depend);
208  }
209 
210 
211 
212  /*
213  * Propagator modification events
214  *
215  */
218  return IntView::med(me);
219  }
220 
221 
222  /*
223  * Delta information for advisors
224  *
225  */
226  forceinline int
227  OffsetView::min(const Delta& d) const {
228  return x.min(d)+c;
229  }
230  forceinline int
231  OffsetView::max(const Delta& d) const {
232  return x.max(d)+c;
233  }
234  forceinline bool
235  OffsetView::any(const Delta& d) const {
236  return x.any(d);
237  }
238 
239 
240 
241  /*
242  * Cloning
243  *
244  */
245  forceinline void
246  OffsetView::update(Space& home, bool share, OffsetView& y) {
247  DerivedView<IntView>::update(home,share,y);
248  c=y.c;
249  }
250 
251 
256  template<>
258  : public Iter::Ranges::Offset<ViewRanges<IntView> > {
259  public:
261 
262 
263  ViewRanges(void);
265  ViewRanges(const OffsetView& x);
267  void init(const OffsetView& x);
269  };
270 
273 
276  ViewRanges<IntView> xi(x.base());
278  }
279 
280  forceinline void
282  ViewRanges<IntView> xi(x.base());
284  }
285 
286  /*
287  * View comparison
288  *
289  */
290  forceinline bool
291  same(const OffsetView& x, const OffsetView& y) {
292  return same(x.base(),y.base()) && (x.offset() == y.offset());
293  }
294  forceinline bool
295  before(const OffsetView& x, const OffsetView& y) {
296  return before(x.base(),y.base())
297  || (same(x.base(),y.base()) && (x.offset() < y.offset()));
298  }
299 
300 }}
301 
302 // STATISTICS: int-var
303