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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, 2009
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#include <algorithm>
35
36namespace Gecode { namespace Int { namespace Unary {
37
38 template<class TaskView>
39 forceinline ExecStatus
40 edgefinding(Space& home, TaskViewArray<TaskView>& t) {
41 Region r;
42
43 OmegaLambdaTree<TaskView> ol(r,t);
44 TaskViewIter<TaskView,STO_LCT,false> q(r,t);
45
46 int j = q.task();
47 while (q.left() > 1) {
48 if (ol.ect() > t[j].lct())
49 return ES_FAILED;
50 ol.shift(j);
51 ++q;
52 j = q.task();
53 while (!ol.lempty() && (ol.lect() > t[j].lct())) {
54 int i = ol.responsible();
55 GECODE_ME_CHECK(t[i].est(home,ol.ect()));
56 ol.lremove(i);
57 }
58 }
59
60 return ES_OK;
61 }
62
63 template<class Task>
64 ExecStatus
65 edgefinding(Space& home, TaskArray<Task>& t) {
66 TaskViewArray<typename TaskTraits<Task>::TaskViewFwd> f(t);
67 GECODE_ES_CHECK(edgefinding(home,f));
68 TaskViewArray<typename TaskTraits<Task>::TaskViewBwd> b(t);
69 return edgefinding(home,b);
70 }
71
72}}}
73
74// STATISTICS: int-prop