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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, 2002
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 {
37
38 /*
39 * Constructors and initialization
40 *
41 */
42 forceinline
43 ScaleView::ScaleView(void) {}
44 forceinline
45 ScaleView::ScaleView(FloatVal d, const FloatView& y)
46 : DerivedView<FloatView>(y), a(d) {}
47
48
49 /*
50 * Value access
51 *
52 */
53 forceinline FloatVal
54 ScaleView::scale(void) const {
55 return a;
56 }
57 forceinline FloatVal
58 ScaleView::domain(void) const {
59 return x.domain()*a;
60 }
61 forceinline FloatNum
62 ScaleView::min(void) const {
63 FloatVal c = x.min(); c *= a; return c.min();
64 }
65 forceinline FloatNum
66 ScaleView::max(void) const {
67 FloatVal c = x.max(); c *= a; return c.max();
68 }
69 forceinline FloatNum
70 ScaleView::med(void) const {
71 FloatVal c = x.med(); c *= a; return (c.min()+c.max())/2;
72 }
73 forceinline FloatVal
74 ScaleView::val(void) const {
75 FloatVal c = x.val(); c *= a; return c;
76 }
77
78 forceinline FloatNum
79 ScaleView::size(void) const {
80 FloatVal c = x.size(); c *= a; return c.max();
81 }
82
83
84 /*
85 * Domain tests
86 *
87 */
88 forceinline bool
89 ScaleView::zero_in(void) const {
90 return x.zero_in();
91 }
92 forceinline bool
93 ScaleView::in(FloatNum n) const {
94 return x.in(n/a);
95 }
96 forceinline bool
97 ScaleView::in(const FloatVal& n) const {
98 return x.in(n/a);
99 }
100
101
102 /*
103 * Domain update by value
104 *
105 */
106 forceinline ModEvent
107 ScaleView::lq(Space& home, int n) {
108 FloatVal c = n; c /= a;
109 return x.lq(home,c.max());
110 }
111 forceinline ModEvent
112 ScaleView::lq(Space& home, FloatNum n) {
113 FloatVal c = n; c /= a;
114 return x.lq(home,c.max());
115 }
116 forceinline ModEvent
117 ScaleView::lq(Space& home, FloatVal n) {
118 FloatVal c = n; c /= a;
119 return x.lq(home,c.max());
120 }
121
122 forceinline ModEvent
123 ScaleView::gq(Space& home, int n) {
124 FloatVal c = n; c /= a;
125 return x.gq(home,c.min());
126 }
127 forceinline ModEvent
128 ScaleView::gq(Space& home, FloatNum n) {
129 FloatVal c = n; c /= a;
130 return x.gq(home,c.min());
131 }
132 forceinline ModEvent
133 ScaleView::gq(Space& home, FloatVal n) {
134 FloatVal c = n; c /= a;
135 return x.gq(home,c.min());
136 }
137
138 forceinline ModEvent
139 ScaleView::eq(Space& home, int n) {
140 FloatVal c = n; c /= a;
141 return x.eq(home,c);
142 }
143 forceinline ModEvent
144 ScaleView::eq(Space& home, FloatNum n) {
145 FloatVal c = n; c /= a;
146 return x.eq(home,c);
147 }
148 forceinline ModEvent
149 ScaleView::eq(Space& home, const FloatVal& n) {
150 FloatVal c = n; c /= a;
151 return x.eq(home,c);
152 }
153
154
155 /*
156 * Delta information for advisors
157 *
158 */
159 forceinline FloatNum
160 ScaleView::min(const Delta& d) const {
161 FloatVal c = x.min(d); c *= a; return c.min();
162 }
163 forceinline FloatNum
164 ScaleView::max(const Delta& d) const {
165 FloatVal c = x.max(d); c *= a; return c.max();
166 }
167
168 forceinline ModEventDelta
169 ScaleView::med(ModEvent me) {
170 return VarImpView<FloatVar>::med(me);
171 }
172
173
174 /*
175 * Cloning
176 *
177 */
178 forceinline void
179 ScaleView::update(Space& home, ScaleView& y) {
180 DerivedView<FloatView>::update(home,y);
181 a=y.a;
182 }
183
184 /*
185 * Ordering
186 *
187 */
188 forceinline bool
189 ScaleView::operator <(const ScaleView& y) const {
190 return ((base() < y.base())
191 || ((base() == y.base()) && (scale() < y.scale())));
192 }
193
194
195 /*
196 * View comparison
197 *
198 */
199 forceinline bool
200 operator ==(const ScaleView& x, const ScaleView& y) {
201 return (x.base() == y.base()) && (x.scale() == y.scale());
202 }
203 forceinline bool
204 operator !=(const ScaleView& x, const ScaleView& y) {
205 return !(x == y);
206 }
207
208}}
209
210// STATISTICS: float-var
211