Generated on Sat Feb 7 2015 02:01:22 for Gecode by doxygen 1.8.9.1
range.hpp
Go to the documentation of this file.
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, 2004
8  *
9  * Last modified:
10  * $Date: 2011-11-18 16:02:48 +0100 (Fri, 18 Nov 2011) $ by $Author: schulte $
11  * $Revision: 12472 $
12  *
13  * This file is part of Gecode, the generic constraint
14  * development environment:
15  * http://www.gecode.org
16  *
17  * Permission is hereby granted, free of charge, to any person obtaining
18  * a copy of this software and associated documentation files (the
19  * "Software"), to deal in the Software without restriction, including
20  * without limitation the rights to use, copy, modify, merge, publish,
21  * distribute, sublicense, and/or sell copies of the Software, and to
22  * permit persons to whom the Software is furnished to do so, subject to
23  * the following conditions:
24  *
25  * The above copyright notice and this permission notice shall be
26  * included in all copies or substantial portions of the Software.
27  *
28  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
29  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
30  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
31  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
32  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
33  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
34  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
35  *
36  */
37 
38 #include <gecode/int/rel.hh>
39 
40 namespace Gecode { namespace Int { namespace Dom {
41 
42  template<class View, ReifyMode rm>
44  ReRange<View,rm>::ReRange(Home home, View x, int min0, int max0, BoolView b)
45  : ReUnaryPropagator<View,PC_INT_BND,BoolView>(home,x,b),
46  min(min0), max(max0) {}
47 
48  template<class View, ReifyMode rm>
50  ReRange<View,rm>::post(Home home, View x, int min, int max, BoolView b) {
51  if (min == max) {
52  return Rel::ReEqDomInt<View,BoolView,rm>::post(home,x,min,b);
53  } else if ((min > max) || (max < x.min()) || (min > x.max())) {
54  if (rm == RM_PMI)
55  return ES_OK;
56  GECODE_ME_CHECK(b.zero(home));
57  } else if ((min <= x.min()) && (x.max() <= max)) {
58  if (rm == RM_IMP)
59  return ES_OK;
60  GECODE_ME_CHECK(b.one(home));
61  } else if (b.one()) {
62  if (rm == RM_PMI)
63  return ES_OK;
64  GECODE_ME_CHECK(x.gq(home,min));
65  GECODE_ME_CHECK(x.lq(home,max));
66  } else if (b.zero()) {
67  if (rm == RM_IMP)
68  return ES_OK;
69  Iter::Ranges::Singleton r(min,max);
70  GECODE_ME_CHECK(x.minus_r(home,r,false));
71  } else {
72  (void) new (home) ReRange<View,rm>(home,x,min,max,b);
73  }
74  return ES_OK;
75  }
76 
77 
78  template<class View, ReifyMode rm>
81  : ReUnaryPropagator<View,PC_INT_BND,BoolView>(home,share,p),
82  min(p.min), max(p.max) {}
83 
84  template<class View, ReifyMode rm>
85  Actor*
86  ReRange<View,rm>::copy(Space& home, bool share) {
87  return new (home) ReRange<View,rm>(home,share,*this);
88  }
89 
90  template<class View, ReifyMode rm>
93  if (b.one()) {
94  if (rm != RM_PMI) {
95  GECODE_ME_CHECK(x0.gq(home,min));
96  GECODE_ME_CHECK(x0.lq(home,max));
97  }
98  } else if (b.zero()) {
99  if (rm != RM_IMP) {
101  GECODE_ME_CHECK(x0.minus_r(home,r,false));
102  }
103  } else if ((x0.max() <= max) && (x0.min() >= min)) {
104  if (rm != RM_IMP)
105  GECODE_ME_CHECK(b.one_none(home));
106  } else if ((x0.max() < min) || (x0.min() > max)) {
107  if (rm != RM_PMI)
108  GECODE_ME_CHECK(b.zero_none(home));
109  } else {
110  return ES_FIX;
111  }
112  return home.ES_SUBSUMED(*this);
113  }
114 
115 
116 }}}
117 
118 // STATISTICS: int-prop
119 
Inverse implication for reification.
Definition: int.hh:847
Range iterator for singleton range.
ExecStatus ES_SUBSUMED(Propagator &p)
Definition: core.hpp:2973
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: range.hpp:92
Reified unary propagator.
Definition: propagator.hpp:58
virtual Actor * copy(Space &home, bool share)
Copy propagator during cloning.
Definition: range.hpp:86
void max(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition: arithmetic.cpp:57
Propagation has computed fixpoint.
Definition: core.hpp:528
Computation spaces.
Definition: core.hpp:1362
ReRange(Space &home, bool share, ReRange &p)
Constructor for cloning p.
Definition: range.hpp:80
Base-class for both propagators and branchers.
Definition: core.hpp:666
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
NNF * r
Right subtree.
Definition: bool-expr.cpp:246
Reified range dom-propagator.
Definition: dom.hh:60
const Gecode::PropCond PC_INT_BND
Propagate when minimum or maximum of a view changes.
Definition: var-type.hpp:91
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:45
static ExecStatus post(Home home, View x, int c, CtrlView b)
Post domain consistent propagator .
Definition: eq.hpp:588
void min(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition: arithmetic.cpp:75
bool one(void) const
Test whether view is assigned to be one.
Definition: bool.hpp:218
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
ExecStatus
Definition: core.hpp:523
#define forceinline
Definition: config.hpp:132
Execution is okay.
Definition: core.hpp:527
static ExecStatus post(Home home, View x, int min, int max, BoolView b)
Post propagator for .
Definition: range.hpp:50
struct Gecode::@518::NNF::@57::@58 b
For binary nodes (and, or, eqv)
Gecode toplevel namespace
Implication for reification.
Definition: int.hh:840
bool zero(void) const
Test whether view is assigned to be zero.
Definition: bool.hpp:214
int ModEventDelta
Modification event deltas.
Definition: core.hpp:173
Home class for posting propagators
Definition: core.hpp:717
Boolean view for Boolean variables.
Definition: view.hpp:1315