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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113/* -*- 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 EqView<VX,VY,VZ,shr,dom>::EqView(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 EqView<VX,VY,VZ,shr,dom>::post(Home home, ViewArray<VX>& x, VY y, VZ z, int c) { GECODE_ME_CHECK(z.gq(home,-c)); GECODE_ME_CHECK(z.lq(home,x.size()-c)); if (isval(y) && z.assigned()) return EqInt<VX,VY>::post(home,x,y,z.val()+c); if (sharing(x,y,z)) (void) new (home) EqView<VX,VY,VZ,true,dom>(home,x,y,z,c); else (void) new (home) EqView<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 EqView<VX,VY,VZ,shr,dom>::EqView(Space& home, EqView<VX,VY,VZ,shr,dom>& p) : ViewBase<VX,VY,VZ>(home,p) {}
template<class VX, class VY, class VZ, bool shr, bool dom> Actor* EqView<VX,VY,VZ,shr,dom>::copy(Space& home) { return new (home) EqView<VX,VY,VZ,shr,dom>(home,*this); }
template<class VX, class VY, class VZ, bool shr, bool dom> ExecStatus EqView<VX,VY,VZ,shr,dom>::propagate(Space& home, const ModEventDelta&) { count(home);
GECODE_ME_CHECK(z.gq(home,atleast())); GECODE_ME_CHECK(z.lq(home,atmost()));
if (z.assigned()) { if (z.val() == atleast()) { GECODE_ES_CHECK(post_false(home,x,y)); return home.ES_SUBSUMED(*this); } if (z.val() == atmost()) { GECODE_ES_CHECK(post_true(home,x,y)); return home.ES_SUBSUMED(*this); } if (!dom || isval(y)) { VY yc(y); GECODE_REWRITE(*this,(EqInt<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