Jip J. Dekker
3e72b0e857
git-subtree-dir: software/gecode_on_record git-subtree-split: 37ed9bda495ea87e63217c19a374b5a93bb0078e
105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
|
|
/*
|
|
* Main authors:
|
|
* Christian Schulte <schulte@gecode.org>
|
|
*
|
|
* Copyright:
|
|
* Christian Schulte, 2003
|
|
*
|
|
* This file is part of Gecode, the generic constraint
|
|
* development environment:
|
|
* http://www.gecode.org
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
namespace Gecode { namespace Int { namespace Count {
|
|
|
|
template<class VX, class VY, class VZ, bool shr, bool dom>
|
|
forceinline
|
|
GqView<VX,VY,VZ,shr,dom>::GqView(Home home, ViewArray<VX>& x, VY y, VZ z, int c)
|
|
: ViewBase<VX,VY,VZ>(home,x,y,z,c) {}
|
|
|
|
template<class VX, class VY, class VZ, bool shr, bool dom>
|
|
ExecStatus
|
|
GqView<VX,VY,VZ,shr,dom>::post(Home home,
|
|
ViewArray<VX>& x, VY y, VZ z, int c) {
|
|
GECODE_ME_CHECK(z.lq(home,x.size()-c));
|
|
if (isval(y) && z.assigned())
|
|
return GqInt<VX,VY>::post(home,x,y,z.val()+c);
|
|
if (sharing(x,y,z))
|
|
(void) new (home) GqView<VX,VY,VZ,true,dom>(home,x,y,z,c);
|
|
else
|
|
(void) new (home) GqView<VX,VY,VZ,false,dom>(home,x,y,z,c);
|
|
return ES_OK;
|
|
}
|
|
|
|
template<class VX, class VY, class VZ, bool shr, bool dom>
|
|
forceinline
|
|
GqView<VX,VY,VZ,shr,dom>::GqView(Space& home, GqView<VX,VY,VZ,shr,dom>& p)
|
|
: ViewBase<VX,VY,VZ>(home,p) {}
|
|
|
|
template<class VX, class VY, class VZ, bool shr, bool dom>
|
|
Actor*
|
|
GqView<VX,VY,VZ,shr,dom>::copy(Space& home) {
|
|
return new (home) GqView<VX,VY,VZ,shr,dom>(home,*this);
|
|
}
|
|
|
|
template<class VX, class VY, class VZ, bool shr, bool dom>
|
|
ExecStatus
|
|
GqView<VX,VY,VZ,shr,dom>::propagate(Space& home, const ModEventDelta&) {
|
|
count(home);
|
|
|
|
GECODE_ME_CHECK(z.lq(home,atmost()));
|
|
|
|
if (z.min() == atmost()) {
|
|
GECODE_ES_CHECK(post_true(home,x,y));
|
|
return home.ES_SUBSUMED(*this);
|
|
}
|
|
if (x.size() == 0)
|
|
return home.ES_SUBSUMED(*this);
|
|
|
|
if (z.assigned() && (!dom ||isval(y))) {
|
|
VY yc(y);
|
|
GECODE_REWRITE(*this,(GqInt<VX,VY>::post(home(*this),x,yc,z.val()+c)));
|
|
}
|
|
|
|
if (dom && !isval(y) && (z.min() > 0)) {
|
|
/*
|
|
* Only if the propagator is at fixpoint here, continue
|
|
* when things are shared: the reason is that prune
|
|
* requires that the views in x overlap with y!
|
|
*/
|
|
if (shr && (VX::me(Propagator::modeventdelta()) != ME_INT_NONE))
|
|
return ES_NOFIX;
|
|
|
|
GECODE_ES_CHECK(prune(home,x,y));
|
|
|
|
return ES_NOFIX;
|
|
}
|
|
|
|
return shr ? ES_NOFIX : ES_FIX;
|
|
}
|
|
|
|
}}}
|
|
|
|
// STATISTICS: int-prop
|