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dekker.one
1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Guido Tack <tack@gecode.org>
5 * Christian Schulte <schulte@gecode.org>
6 *
7 * Contributing authors:
8 * Gabor Szokoli <szokoli@gecode.org>
9 *
10 * Copyright:
11 * Guido Tack, 2004
12 * Christian Schulte, 2004
13 * Gabor Szokoli, 2004
14 *
15 * This file is part of Gecode, the generic constraint
16 * development environment:
17 * http://www.gecode.org
18 *
19 * Permission is hereby granted, free of charge, to any person obtaining
20 * a copy of this software and associated documentation files (the
21 * "Software"), to deal in the Software without restriction, including
22 * without limitation the rights to use, copy, modify, merge, publish,
23 * distribute, sublicense, and/or sell copies of the Software, and to
24 * permit persons to whom the Software is furnished to do so, subject to
25 * the following conditions:
26 *
27 * The above copyright notice and this permission notice shall be
28 * included in all copies or substantial portions of the Software.
29 *
30 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
31 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
32 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
33 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
34 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
35 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
36 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
37 *
38 */
39
40namespace Gecode { namespace Set { namespace Rel {
41
42 template<class View0, class View1>
43 forceinline
44 Subset<View0,View1>::Subset(Home home, View0 y0, View1 y1)
45 : MixBinaryPropagator<View0,PC_SET_CGLB,
46 View1,PC_SET_CLUB>(home,y0,y1) {}
47
48 template<class View0, class View1>
49 forceinline
50 Subset<View0,View1>::Subset(Space& home, Subset& p)
51 : MixBinaryPropagator<View0,PC_SET_CGLB,
52 View1,PC_SET_CLUB>(home,p) {}
53
54 template<class View0, class View1>
55 ExecStatus Subset<View0,View1>::post(Home home, View0 x, View1 y) {
56 if (!same(x,y))
57 (void) new (home) Subset(home,x,y);
58 return ES_OK;
59 }
60
61 template<class View0, class View1>
62 Actor*
63 Subset<View0,View1>::copy(Space& home) {
64 return new (home) Subset(home,*this);
65 }
66
67 template<class View0, class View1>
68 ExecStatus
69 Subset<View0,View1>::propagate(Space& home, const ModEventDelta&) {
70 bool oneassigned = x0.assigned() || x1.assigned();
71 unsigned int x0glbsize;
72 do {
73 GlbRanges<View0> x0lb(x0);
74 GECODE_ME_CHECK ( x1.includeI(home,x0lb) );
75 GECODE_ME_CHECK ( x1.cardMin(home,x0.cardMin()) );
76 LubRanges<View1> x1ub(x1);
77 x0glbsize = x0.glbSize();
78 GECODE_ME_CHECK ( x0.intersectI(home,x1ub) );
79 GECODE_ME_CHECK ( x0.cardMax(home,x1.cardMax()) );
80 } while (x0.glbSize() > x0glbsize);
81
82 if (x0.cardMin() == x1.cardMax())
83 GECODE_REWRITE(*this,(Eq<View0,View1>::post(home(*this),x0,x1)));
84
85 if (shared(x0,x1)) {
86 return oneassigned ? home.ES_SUBSUMED(*this) : ES_NOFIX;
87 }
88 return (x0.assigned() || x1.assigned()) ? home.ES_SUBSUMED(*this) : ES_FIX;
89 }
90
91}}}
92
93// STATISTICS: set-prop