this repo has no description
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 * Contributing authors:
7 * Gabor Szokoli <szokoli@gecode.org>
8 * Guido Tack <tack@gecode.org>
9 *
10 * Copyright:
11 * Christian Schulte, 2012
12 * Gabor Szokoli, 2004
13 * Guido Tack, 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 Branch {
41
42 forceinline
43 ValSelMin::ValSelMin(Space& home, const ValBranch<Var>& vb)
44 : ValSel<SetView,int>(home,vb) {}
45 forceinline
46 ValSelMin::ValSelMin(Space& home, ValSelMin& vs)
47 : ValSel<SetView,int>(home,vs) {}
48 forceinline int
49 ValSelMin::val(const Space&, SetView x, int) {
50 UnknownRanges<SetView> u(x);
51 return u.min();
52 }
53
54 forceinline
55 ValSelMax::ValSelMax(Space& home, const ValBranch<Var>& vb)
56 : ValSel<SetView,int>(home,vb) {}
57 forceinline
58 ValSelMax::ValSelMax(Space& home, ValSelMax& vs)
59 : ValSel<SetView,int>(home,vs) {}
60 forceinline int
61 ValSelMax::val(const Space&, SetView x, int) {
62 int max = 0;
63 for (UnknownRanges<SetView> u(x); u(); ++u)
64 max = u.max();
65 return max;
66 }
67
68 forceinline
69 ValSelMed::ValSelMed(Space& home, const ValBranch<Var>& vb)
70 : ValSel<SetView,int>(home,vb) {}
71 forceinline
72 ValSelMed::ValSelMed(Space& home, ValSelMed& vs)
73 : ValSel<SetView,int>(home,vs) {}
74 forceinline int
75 ValSelMed::val(const Space&, SetView x, int) {
76 UnknownRanges<SetView> u1(x);
77 unsigned int i = Iter::Ranges::size(u1) / 2;
78 UnknownRanges<SetView> u2(x);
79 int med = (u2.min()+u2.max()) / 2;
80 ++u2;
81 if (!u2()) {
82 return med;
83 }
84 UnknownRanges<SetView> u3(x);
85 while (i >= u3.width()) {
86 i -= u3.width();
87 ++u3;
88 }
89 return u3.min() + static_cast<int>(i);
90 }
91
92 forceinline
93 ValSelRnd::ValSelRnd(Space& home, const ValBranch<Var>& vb)
94 : ValSel<SetView,int>(home,vb), r(vb.rnd()) {}
95 forceinline
96 ValSelRnd::ValSelRnd(Space& home, ValSelRnd& vs)
97 : ValSel<SetView,int>(home,vs), r(vs.r) {
98 }
99 forceinline int
100 ValSelRnd::val(const Space&, SetView x, int) {
101 UnknownRanges<SetView> u(x);
102 unsigned int p = r(Iter::Ranges::size(u));
103 for (UnknownRanges<SetView> i(x); i(); ++i) {
104 if (i.width() > p)
105 return i.min() + static_cast<int>(p);
106 p -= i.width();
107 }
108 GECODE_NEVER;
109 return 0;
110 }
111 forceinline bool
112 ValSelRnd::notice(void) const {
113 return true;
114 }
115 forceinline void
116 ValSelRnd::dispose(Space&) {
117 r.~Rnd();
118 }
119
120}}}
121
122// STATISTICS: set-branch
123