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1.8.3.1
gecode
int
element
pair.cpp
Go to the documentation of this file.
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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, 2009
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*
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* Last modified:
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* $Date: 2010-07-15 01:46:18 +1000 (Thu, 15 Jul 2010) $ by $Author: schulte $
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* $Revision: 11192 $
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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/element.hh
>
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namespace
Gecode {
namespace
Int {
namespace
Element {
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Actor*
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Pair::copy
(
Space
& home,
bool
share) {
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return
new
(home)
Pair
(home,share,*
this
);
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}
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class
PairValues
{
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private
:
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IntView
x;
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ViewValues<IntView>
xv;
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ViewValues<IntView>
yv;
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int
w;
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public
:
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PairValues
(
IntView
x,
IntView
y,
int
w);
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bool
operator ()
(
void
)
const
;
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void
operator ++
(
void
);
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int
val
(
void
)
const
;
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};
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forceinline
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PairValues::PairValues
(
IntView
x0,
IntView
y0,
int
w0)
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: x(x0), xv(x0), yv(y0), w(w0) {}
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forceinline
void
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PairValues::operator ++
(
void
) {
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++xv;
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if
(!xv()) {
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xv.
init
(x); ++yv;
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}
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}
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forceinline
bool
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PairValues::operator ()
(
void
)
const
{
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return
yv();
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}
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forceinline
int
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PairValues::val
(
void
)
const
{
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return
xv.
val
()+w*yv.
val
();
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}
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ExecStatus
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Pair::propagate
(
Space
& home,
const
ModEventDelta
&) {
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Region
r
(home);
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if
(
x0
.
assigned
()) {
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// Bitset for supported div and mod values
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Support::BitSet<Region>
d
(r,static_cast<unsigned int>((
x2
.
max
() /
w
)+1));
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for
(
ViewValues<IntView>
i
(
x2
);
i
(); ++
i
) {
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d
.set(static_cast<unsigned int>(
i
.val() /
w
));
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}
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Iter::Values::BitSet<Support::BitSet<Region>
> id(
d
,
x1
.
min
(),
x1
.
max
());
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GECODE_ME_CHECK
(
x1
.
inter_v
(home,
id
,
false
));
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}
else
{
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// Bitset for supported div and mod values
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Support::BitSet<Region>
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d
(r,static_cast<unsigned int>((
x2
.
max
() /
w
)+1)),
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m
(r,static_cast<unsigned int>(
w
));
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for
(
ViewValues<IntView>
i
(
x2
);
i
(); ++
i
) {
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d
.set(static_cast<unsigned int>(
i
.val() /
w
));
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m
.set(static_cast<unsigned int>(
i
.val() %
w
));
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}
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Iter::Values::BitSet<Support::BitSet<Region>
> im(
m
,
x0
.
min
(),
x0
.
max
());
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GECODE_ME_CHECK
(
x0
.
inter_v
(home,im,
false
));
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Iter::Values::BitSet<Support::BitSet<Region>
> id(
d
,
x1
.
min
(),
x1
.
max
());
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GECODE_ME_CHECK
(
x1
.
inter_v
(home,
id
,
false
));
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}
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if
(
x0
.
assigned
() &&
x1
.
assigned
()) {
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GECODE_ME_CHECK
(
x2
.
eq
(home,
x0
.
val
()+
w
*
x1
.
val
()));
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return
home.
ES_SUBSUMED
(*
this
);
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}
else
if
(
x1
.
assigned
()) {
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OffsetView
x0x1w(
x0
,
x1
.
val
()*
w
);
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GECODE_REWRITE
(*
this
,(
Rel::EqDom<OffsetView,IntView>
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::
post
(home(*
this
),x0x1w,
x2
)));
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}
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PairValues
xy(
x0
,
x1
,
w
);
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GECODE_ME_CHECK
(
x2
.
inter_v
(home,xy,
false
));
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if
(
x2
.
assigned
()) {
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GECODE_ME_CHECK
(
x0
.
eq
(home,
x2
.
val
() %
w
));
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GECODE_ME_CHECK
(
x1
.
eq
(home,static_cast<int>(
x2
.
val
() /
w
)));
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return
home.
ES_SUBSUMED
(*
this
);
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}
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return
ES_NOFIX
;
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}
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}}}
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// STATISTICS: int-prop
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