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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 * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
6 *
7 * Copyright:
8 * Christian Schulte, 2004
9 * Vincent Barichard, 2012
10 *
11 * This file is part of Gecode, the generic constraint
12 * development environment:
13 * http://www.gecode.org
14 *
15 * Permission is hereby granted, free of charge, to any person obtaining
16 * a copy of this software and associated documentation files (the
17 * "Software"), to deal in the Software without restriction, including
18 * without limitation the rights to use, copy, modify, merge, publish,
19 * distribute, sublicense, and/or sell copies of the Software, and to
20 * permit persons to whom the Software is furnished to do so, subject to
21 * the following conditions:
22 *
23 * The above copyright notice and this permission notice shall be
24 * included in all copies or substantial portions of the Software.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
30 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
31 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
32 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 *
34 */
35
36namespace Gecode { namespace Float { namespace Channel {
37
38 template<class A, class B>
39 forceinline
40 Channel<A,B>::Channel(Home home, A x0, B x1)
41 : MixBinaryPropagator<A,PC_FLOAT_BND,B,Int::PC_INT_BND>(home,x0,x1) {}
42
43 template<class A, class B>
44 forceinline
45 Channel<A,B>::Channel(Space& home, Channel<A,B>& p)
46 : MixBinaryPropagator<A,PC_FLOAT_BND,B,Int::PC_INT_BND>(home,p) {}
47
48 template<class A, class B>
49 Actor*
50 Channel<A,B>::copy(Space& home) {
51 return new (home) Channel<A,B>(home,*this);
52 }
53
54 template<class A, class B>
55 ExecStatus
56 Channel<A,B>::post(Home home, A x0, B x1) {
57 GECODE_ME_CHECK(x0.eq(home,FloatVal(Int::Limits::min,
58 Int::Limits::max)));
59 GECODE_ME_CHECK(x1.gq(home,static_cast<int>(std::ceil(x0.min()))));
60 GECODE_ME_CHECK(x1.lq(home,static_cast<int>(std::floor(x0.max()))));
61 GECODE_ME_CHECK(x0.eq(home,FloatVal(x1.min(),x1.max())));
62 (void) new (home) Channel<A,B>(home,x0,x1);
63 return ES_OK;
64 }
65
66 template<class A, class B>
67 ExecStatus
68 Channel<A,B>::propagate(Space& home, const ModEventDelta&) {
69 GECODE_ME_CHECK(x1.gq(home,static_cast<int>(std::ceil(x0.min()))));
70 GECODE_ME_CHECK(x1.lq(home,static_cast<int>(std::floor(x0.max()))));
71 GECODE_ME_CHECK(x0.eq(home,FloatVal(x1.min(),x1.max())));
72 return x0.assigned() ? home.ES_SUBSUMED(*this) : ES_FIX;
73 }
74
75}}}
76
77// STATISTICS: float-prop
78