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dekker.one
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, 2009
8 *
9 * This file is part of Gecode, the generic constraint
10 * development environment:
11 * http://www.gecode.org
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining
14 * a copy of this software and associated documentation files (the
15 * "Software"), to deal in the Software without restriction, including
16 * without limitation the rights to use, copy, modify, merge, publish,
17 * distribute, sublicense, and/or sell copies of the Software, and to
18 * permit persons to whom the Software is furnished to do so, subject to
19 * the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be
22 * included in all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 *
32 */
33
34#include <gecode/int/rel.hh>
35
36namespace Gecode { namespace Int { namespace Element {
37
38 forceinline
39 Pair::Pair(Home home, IntView x0, IntView x1, IntView x2, int w0)
40 : TernaryPropagator<IntView,PC_INT_DOM>(home,x0,x1,x2), w(w0) {}
41
42 inline ExecStatus
43 Pair::post(Home home, IntView x0, IntView x1, IntView x2,
44 int w, int h) {
45 GECODE_ME_CHECK(x0.gq(home,0)); GECODE_ME_CHECK(x0.le(home,w));
46 GECODE_ME_CHECK(x1.gq(home,0)); GECODE_ME_CHECK(x1.le(home,h));
47 GECODE_ME_CHECK(x2.gq(home,0)); GECODE_ME_CHECK(x2.le(home,w*h));
48 if (x0.assigned() && x1.assigned()) {
49 GECODE_ME_CHECK(x2.eq(home,x0.val()+w*x1.val()));
50 } else if (x1.assigned()) {
51 OffsetView x0x1w(x0,x1.val()*w);
52 return Rel::EqDom<OffsetView,IntView>::post(home,x0x1w,x2);
53 } else if (x2.assigned()) {
54 GECODE_ME_CHECK(x0.eq(home,x2.val() % w));
55 GECODE_ME_CHECK(x1.eq(home,static_cast<int>(x2.val() / w)));
56 } else {
57 assert(!shared(x0,x2) && !shared(x1,x2));
58 (void) new (home) Pair(home,x0,x1,x2,w);
59 }
60 return ES_OK;
61 }
62
63 forceinline
64 Pair::Pair(Space& home, Pair& p)
65 : TernaryPropagator<IntView,PC_INT_DOM>(home,p), w(p.w) {}
66
67 forceinline
68 PairWithOffsets::PairWithOffsets(Home home, OffsetView x0, OffsetView x1,
69 IntView x2, int w0)
70 : TernaryPropagator<OffsetView,PC_INT_DOM>(home,x0,x1,OffsetView(x2,0)),
71 w(w0) {}
72
73 inline ExecStatus
74 PairWithOffsets::post(Home home, OffsetView x0, OffsetView x1, IntView x2,
75 int w, int h) {
76 GECODE_ME_CHECK(x0.gq(home,0)); GECODE_ME_CHECK(x0.le(home,w));
77 GECODE_ME_CHECK(x1.gq(home,0)); GECODE_ME_CHECK(x1.le(home,h));
78 GECODE_ME_CHECK(x2.gq(home,0)); GECODE_ME_CHECK(x2.le(home,w*h));
79 if (x0.assigned() && x1.assigned()) {
80 GECODE_ME_CHECK(x2.eq(home,x0.val()+w*x1.val()));
81 } else if (x1.assigned()) {
82 OffsetView x0x1w(x0.base(),x0.offset()+x1.val()*w);
83 return Rel::EqDom<OffsetView,IntView>::post(home,x0x1w,x2);
84 } else if (x2.assigned()) {
85 GECODE_ME_CHECK(x0.eq(home,x2.val() % w));
86 GECODE_ME_CHECK(x1.eq(home,static_cast<int>(x2.val() / w)));
87 } else {
88 assert(!shared(x0,x2) && !shared(x1,x2));
89 (void) new (home) PairWithOffsets(home,x0,x1,x2,w);
90 }
91 return ES_OK;
92 }
93
94 forceinline
95 PairWithOffsets::PairWithOffsets(Space& home, PairWithOffsets& p)
96 : TernaryPropagator<OffsetView,PC_INT_DOM>(home,p), w(p.w) {}
97
98}}}
99
100// STATISTICS: int-prop
101