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/* -*- 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
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