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1.8.1.1
gecode
int
count
view-eq.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, 2003
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*
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* Last modified:
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* $Date: 2011-09-20 21:58:39 +1000 (Tue, 20 Sep 2011) $ by $Author: schulte $
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* $Revision: 12404 $
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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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namespace
Gecode {
namespace
Int {
namespace
Count {
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr,
bool
dom>
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forceinline
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EqView<VX,VY,VZ,shr,dom>::EqView
(
Home
home,
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ViewArray<VX>
& x, VY y, VZ z,
int
c
)
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:
ViewBase
<VX,VY,VZ>(home,x,y,z,c) {}
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr,
bool
dom>
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ExecStatus
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EqView<VX,VY,VZ,shr,dom>::post
(
Home
home,
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ViewArray<VX>
& x, VY y, VZ z,
int
c
) {
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GECODE_ME_CHECK
(z.gq(home,-c));
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GECODE_ME_CHECK
(z.lq(home,x.
size
()-
c
));
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if
((
vtd
(y) !=
VTD_VARVIEW
) && z.assigned())
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return
EqInt<VX,VY>::post
(home,x,y,z.val()+
c
);
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if
(sharing(x,y,z))
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(
void
)
new
(home)
EqView<VX,VY,VZ,true,dom>
(home,x,y,z,c);
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else
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(
void
)
new
(home)
EqView<VX,VY,VZ,false,dom>
(home,x,y,z,c);
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return
ES_OK
;
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}
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr,
bool
dom>
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forceinline
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EqView<VX,VY,VZ,shr,dom>::EqView
(
Space
& home,
bool
share,
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EqView<VX,VY,VZ,shr,dom>
& p)
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:
ViewBase
<VX,VY,VZ>(home,share,p) {}
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr,
bool
dom>
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Actor
*
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EqView<VX,VY,VZ,shr,dom>::copy
(
Space
& home,
bool
share) {
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return
new
(home)
EqView<VX,VY,VZ,shr,dom>
(home,share,*
this
);
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}
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr,
bool
dom>
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ExecStatus
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EqView<VX,VY,VZ,shr,dom>::propagate
(
Space
& home,
const
ModEventDelta
&) {
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count
(home);
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GECODE_ME_CHECK
(z.gq(home,
atleast
()));
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GECODE_ME_CHECK
(z.lq(home,
atmost
()));
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if
(z.assigned()) {
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if
(z.val() ==
atleast
()) {
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GECODE_ES_CHECK
(
post_false
(home,x,y));
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return
home.
ES_SUBSUMED
(*
this
);
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}
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if
(z.val() ==
atmost
()) {
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GECODE_ES_CHECK
(
post_true
(home,x,y));
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return
home.
ES_SUBSUMED
(*
this
);
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}
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if
(!
dom
|| (
vtd
(y) !=
VTD_VARVIEW
)) {
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VY yc(y);
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GECODE_REWRITE
(*
this
,(
EqInt<VX,VY>
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::
post
(home(*
this
),x,yc,z.val()+
c
)));
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}
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}
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if
(
dom
&& (
vtd
(y) ==
VTD_VARVIEW
) && (z.min() > 0)) {
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/*
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* Only if the propagator is at fixpoint here, continue
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* when things are shared: the reason is that prune
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* requires that the views in x overlap with y!
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*/
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if
(shr && (VX::me(
Propagator::modeventdelta
()) !=
ME_INT_NONE
))
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return
ES_NOFIX
;
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GECODE_ES_CHECK
(
prune
(home,x,y));
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return
ES_NOFIX
;
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}
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return
shr ?
ES_NOFIX
:
ES_FIX
;
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}
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}}}
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// STATISTICS: int-prop