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1.8.3.1
gecode
int
element
pair.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, 2009
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*
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* Last modified:
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* $Date: 2009-10-30 00:58:00 +1100 (Fri, 30 Oct 2009) $ by $Author: schulte $
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* $Revision: 10000 $
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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
Element {
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forceinline
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Pair::Pair
(
Home
home,
IntView
x0,
IntView
x1,
IntView
x2,
int
w0)
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:
TernaryPropagator
<
IntView
,
PC_INT_DOM
>(home,x0,x1,x2), w(w0) {}
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inline
ExecStatus
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Pair::post
(
Home
home,
IntView
x0,
IntView
x1,
IntView
x2,
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int
w,
int
h) {
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GECODE_ME_CHECK
(x0.
gq
(home,0));
GECODE_ME_CHECK
(x0.
le
(home,w));
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GECODE_ME_CHECK
(x1.
gq
(home,0));
GECODE_ME_CHECK
(x1.
le
(home,h));
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GECODE_ME_CHECK
(x2.
gq
(home,0));
GECODE_ME_CHECK
(x2.
le
(home,w*h));
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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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}
else
if
(x1.
assigned
()) {
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OffsetView
x0x1w(x0,x1.
val
()*
w
);
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return
Rel::EqDom<OffsetView,IntView>::post
(home,x0x1w,x2);
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}
else
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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}
else
{
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assert(!
shared
(x0,x2) && !
shared
(x1,x2));
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(void)
new
(home)
Pair
(home,x0,x1,x2,w);
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}
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return
ES_OK
;
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}
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forceinline
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Pair::Pair
(
Space
& home,
bool
share,
Pair
& p)
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:
TernaryPropagator
<
IntView
,
PC_INT_DOM
>(home,share,p), w(p.w) {}
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}}}
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// STATISTICS: int-prop
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