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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, 2007
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
34namespace Gecode { namespace Int { namespace Channel {
35
36 forceinline
37 LinkSingle::LinkSingle(Home home, BoolView x0, IntView x1)
38 : MixBinaryPropagator<BoolView,PC_BOOL_VAL,IntView,PC_INT_VAL>
39 (home,x0,x1) {}
40
41 forceinline ExecStatus
42 LinkSingle::post(Home home, BoolView x0, IntView x1) {
43 if (x1.assigned()) {
44 switch (x1.val()) {
45 case 0:
46 GECODE_ME_CHECK(x0.zero(home)); break;
47 case 1:
48 GECODE_ME_CHECK(x0.one(home)); break;
49 default:
50 return ES_FAILED;
51 }
52 } else if (x0.zero()) {
53 GECODE_ME_CHECK(x1.eq(home,0));
54 } else if (x0.one()) {
55 GECODE_ME_CHECK(x1.eq(home,1));
56 } else {
57 GECODE_ME_CHECK(x1.gq(home,0));
58 GECODE_ME_CHECK(x1.lq(home,1));
59 (void) new (home) LinkSingle(home,x0,x1);
60 }
61 return ES_OK;
62 }
63
64}}}
65
66// STATISTICS: int-prop
67