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1.8.4
gecode
int
dom
range.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2004
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*
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* Last modified:
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* $Date: 2011-11-18 16:02:48 +0100 (Fri, 18 Nov 2011) $ by $Author: schulte $
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* $Revision: 12472 $
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <
gecode/int/rel.hh
>
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namespace
Gecode {
namespace
Int {
namespace
Dom {
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template
<
class
View, ReifyMode rm>
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forceinline
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ReRange<View,rm>::ReRange
(
Home
home, View
x
,
int
min0,
int
max0,
BoolView
b
)
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:
ReUnaryPropagator
<View,
PC_INT_BND
,
BoolView
>(home,x,b),
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min
(min0),
max
(max0) {}
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template
<
class
View, ReifyMode rm>
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ExecStatus
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ReRange<View,rm>::post
(
Home
home, View
x
,
int
min
,
int
max
,
BoolView
b
) {
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if
(min == max) {
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return
Rel::ReEqDomInt<View,BoolView,rm>::post
(home,x,min,b);
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}
else
if
((min > max) || (max < x.min()) || (min > x.max())) {
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if
(rm ==
RM_PMI
)
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return
ES_OK
;
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GECODE_ME_CHECK
(b.
zero
(home));
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}
else
if
((min <= x.min()) && (x.max() <=
max
)) {
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if
(rm ==
RM_IMP
)
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return
ES_OK
;
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GECODE_ME_CHECK
(b.
one
(home));
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}
else
if
(b.
one
()) {
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if
(rm ==
RM_PMI
)
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return
ES_OK
;
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GECODE_ME_CHECK
(x.gq(home,min));
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GECODE_ME_CHECK
(x.lq(home,max));
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}
else
if
(b.
zero
()) {
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if
(rm ==
RM_IMP
)
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return
ES_OK
;
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Iter::Ranges::Singleton
r
(min,max);
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GECODE_ME_CHECK
(x.minus_r(home,r,
false
));
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}
else
{
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(void)
new
(home)
ReRange<View,rm>
(home,
x
,
min
,
max
,
b
);
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}
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return
ES_OK
;
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}
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template
<
class
View, ReifyMode rm>
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forceinline
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ReRange<View,rm>::ReRange
(
Space
& home,
bool
share,
ReRange
&
p
)
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:
ReUnaryPropagator
<View,
PC_INT_BND
,
BoolView
>(home,share,p),
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min
(p.
min
),
max
(p.
max
) {}
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template
<
class
View, ReifyMode rm>
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Actor
*
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ReRange<View,rm>::copy
(
Space
& home,
bool
share) {
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return
new
(home)
ReRange<View,rm>
(home,share,*
this
);
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}
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template
<
class
View, ReifyMode rm>
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ExecStatus
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ReRange<View,rm>::propagate
(
Space
& home,
const
ModEventDelta
&) {
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if
(
b
.one()) {
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if
(rm !=
RM_PMI
) {
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GECODE_ME_CHECK
(x0.gq(home,
min
));
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GECODE_ME_CHECK
(x0.lq(home,
max
));
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}
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}
else
if
(
b
.zero()) {
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if
(rm !=
RM_IMP
) {
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Iter::Ranges::Singleton
r
(
min
,
max
);
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GECODE_ME_CHECK
(x0.minus_r(home,r,
false
));
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}
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}
else
if
((x0.max() <=
max
) && (x0.min() >=
min
)) {
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if
(rm !=
RM_IMP
)
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GECODE_ME_CHECK
(
b
.one_none(home));
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}
else
if
((x0.max() <
min
) || (x0.min() >
max
)) {
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if
(rm !=
RM_PMI
)
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GECODE_ME_CHECK
(
b
.zero_none(home));
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}
else
{
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return
ES_FIX
;
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}
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return
home.
ES_SUBSUMED
(*
this
);
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}
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}}}
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// STATISTICS: int-prop
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