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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- *//* * Main authors: * Guido Tack <tack@gecode.org> * Christian Schulte <schulte@gecode.org> * * Contributing authors: * Gabor Szokoli <szokoli@gecode.org> * * Copyright: * Guido Tack, 2004 * Christian Schulte, 2004 * Gabor Szokoli, 2004 * * 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. * */
#include <gecode/set/sequence.hh>
namespace Gecode { namespace Set { namespace Sequence {
/* * "Sequenced union" propagator * */
Actor* SeqU::copy(Space& home) { return new (home) SeqU(home,*this); }
ExecStatus SeqU::propagateSeqUnion(Space& home, bool& modified, ViewArray<SetView>& x, SetView& y) { Region r; GlbRanges<SetView>* XLBs = r.alloc<GlbRanges<SetView> >(x.size()); for (int i=x.size(); i--; ) { GlbRanges<SetView> lb(x[i]); XLBs[i]=lb; } Iter::Ranges::NaryAppend<GlbRanges<SetView> > u(XLBs,x.size()); GECODE_ME_CHECK_MODIFIED(modified, y.includeI(home,u));
GLBndSet before(home); for (int i=0; i<x.size(); i++) { LubRanges<SetView> xiub(x[i]); before.includeI(home, xiub); BndSetRanges beforeR(before); GlbRanges<SetView> ylb(y); Iter::Ranges::Diff<GlbRanges<SetView>, BndSetRanges> diff(ylb, beforeR); if (diff()) { GECODE_ME_CHECK_MODIFIED(modified, x[i].exclude(home, diff.min(), Limits::max)); } } before.dispose(home);
GLBndSet after(home); for (int i=x.size(); i--; ) { LubRanges<SetView> xiub(x[i]); after.includeI(home, xiub); BndSetRanges afterR(after); GlbRanges<SetView> ylb(y); Iter::Ranges::Diff<GlbRanges<SetView>, BndSetRanges> diff(ylb, afterR); if (diff()) { int max = diff.max(); for (; diff(); ++diff) max = diff.max(); GECODE_ME_CHECK_MODIFIED(modified, x[i].exclude(home, Limits::min, max)); } } after.dispose(home);
return ES_FIX; }
//Enforces sequentiality and ensures y contains union of Xi lower bounds. ExecStatus SeqU::propagate(Space& home, const ModEventDelta& med) { ModEvent me0 = SetView::me(med); bool ubevent = Rel::testSetEventUB(me0); bool anybevent = Rel::testSetEventAnyB(me0); bool cardevent = Rel::testSetEventCard(me0);
bool modified = false; bool assigned=false; bool oldModified = false;
do { oldModified = modified; modified = false;
if (oldModified || modified || anybevent || cardevent) GECODE_ES_CHECK(propagateSeq(home,modified,assigned,x)); if (oldModified || modified || anybevent) GECODE_ES_CHECK(propagateSeqUnion(home,modified,x,y)); if (oldModified || modified || ubevent) GECODE_ES_CHECK(RelOp::unionNXiUB(home,modified,x,y,unionOfDets)); if (oldModified || modified || ubevent) GECODE_ES_CHECK(RelOp::partitionNYUB(home,modified,x,y,unionOfDets)); if (oldModified || modified || anybevent) GECODE_ES_CHECK(RelOp::partitionNXiLB(home,modified,x,y,unionOfDets)); if (oldModified || modified || cardevent || ubevent) GECODE_ES_CHECK(RelOp::partitionNCard(home,modified,x,y,unionOfDets));
} while (modified);
for (int i=x.size(); i--;) if (!x[i].assigned()) return ES_FIX; return home.ES_SUBSUMED(*this); }
}}}
// STATISTICS: set-prop