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dekker.one
1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
5 *
6 * Copyright:
7 * Vincent Barichard, 2012
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#ifdef GECODE_HAS_FLOAT_VARS
35
36namespace Gecode {
37
38 /*
39 * Operations for linear float relations
40 *
41 */
42 forceinline
43 LinFloatRel::LinFloatRel(void) {}
44
45 forceinline
46 LinFloatRel::LinFloatRel(const LinFloatExpr& l, FloatRelType frt0, const LinFloatExpr& r)
47 : e(l-r), frt(frt0) {}
48
49 forceinline
50 LinFloatRel::LinFloatRel(const LinFloatExpr& l, FloatRelType frt0, FloatVal r)
51 : e(l-r), frt(frt0) {}
52
53 forceinline
54 LinFloatRel::LinFloatRel(FloatVal l, FloatRelType frt0, const LinFloatExpr& r)
55 : e(l-r), frt(frt0) {}
56
57 forceinline FloatRelType
58 LinFloatRel::neg(FloatRelType frt) {
59 switch (frt) {
60 case FRT_EQ: return FRT_NQ;
61 case FRT_NQ: return FRT_EQ;
62 case FRT_LQ: return FRT_GR;
63 case FRT_LE: return FRT_GQ;
64 case FRT_GQ: return FRT_LE;
65 case FRT_GR: return FRT_LQ;
66 default: GECODE_NEVER;
67 }
68 return FRT_LQ;
69 }
70
71 forceinline void
72 LinFloatRel::post(Home home, bool t) const {
73 e.post(home,t ? frt : neg(frt));
74 }
75
76 forceinline void
77 LinFloatRel::post(Home home, const BoolVar& b, bool t) const {
78 e.post(home,t ? frt : neg(frt),b);
79 }
80
81}
82
83#endif
84
85// STATISTICS: minimodel-any