Jip J. Dekker
3e72b0e857
git-subtree-dir: software/gecode_on_record git-subtree-split: 37ed9bda495ea87e63217c19a374b5a93bb0078e
142 lines
4.7 KiB
C++
142 lines
4.7 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Guido Tack <tack@gecode.org>
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* Christian Schulte <schulte@gecode.org>
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*
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* Contributing authors:
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* Gabor Szokoli <szokoli@gecode.org>
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*
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* Copyright:
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* Guido Tack, 2004
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* Christian Schulte, 2004
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* Gabor Szokoli, 2004
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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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#include <gecode/set/sequence.hh>
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namespace Gecode { namespace Set { namespace Sequence {
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/*
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* "Sequenced union" propagator
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*
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*/
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Actor*
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SeqU::copy(Space& home) {
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return new (home) SeqU(home,*this);
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}
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ExecStatus
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SeqU::propagateSeqUnion(Space& home,
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bool& modified, ViewArray<SetView>& x,
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SetView& y) {
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Region r;
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GlbRanges<SetView>* XLBs = r.alloc<GlbRanges<SetView> >(x.size());
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for (int i=x.size(); i--; ) {
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GlbRanges<SetView> lb(x[i]);
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XLBs[i]=lb;
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}
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Iter::Ranges::NaryAppend<GlbRanges<SetView> > u(XLBs,x.size());
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GECODE_ME_CHECK_MODIFIED(modified, y.includeI(home,u));
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GLBndSet before(home);
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for (int i=0; i<x.size(); i++) {
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LubRanges<SetView> xiub(x[i]);
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before.includeI(home, xiub);
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BndSetRanges beforeR(before);
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GlbRanges<SetView> ylb(y);
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Iter::Ranges::Diff<GlbRanges<SetView>, BndSetRanges> diff(ylb, beforeR);
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if (diff()) {
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GECODE_ME_CHECK_MODIFIED(modified, x[i].exclude(home, diff.min(),
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Limits::max));
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}
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}
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before.dispose(home);
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GLBndSet after(home);
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for (int i=x.size(); i--; ) {
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LubRanges<SetView> xiub(x[i]);
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after.includeI(home, xiub);
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BndSetRanges afterR(after);
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GlbRanges<SetView> ylb(y);
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Iter::Ranges::Diff<GlbRanges<SetView>, BndSetRanges> diff(ylb, afterR);
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if (diff()) {
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int max = diff.max();
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for (; diff(); ++diff)
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max = diff.max();
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GECODE_ME_CHECK_MODIFIED(modified, x[i].exclude(home,
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Limits::min,
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max));
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}
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}
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after.dispose(home);
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return ES_FIX;
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}
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//Enforces sequentiality and ensures y contains union of Xi lower bounds.
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ExecStatus
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SeqU::propagate(Space& home, const ModEventDelta& med) {
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ModEvent me0 = SetView::me(med);
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bool ubevent = Rel::testSetEventUB(me0);
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bool anybevent = Rel::testSetEventAnyB(me0);
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bool cardevent = Rel::testSetEventCard(me0);
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bool modified = false;
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bool assigned=false;
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bool oldModified = false;
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do {
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oldModified = modified;
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modified = false;
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if (oldModified || modified || anybevent || cardevent)
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GECODE_ES_CHECK(propagateSeq(home,modified,assigned,x));
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if (oldModified || modified || anybevent)
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GECODE_ES_CHECK(propagateSeqUnion(home,modified,x,y));
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if (oldModified || modified || ubevent)
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GECODE_ES_CHECK(RelOp::unionNXiUB(home,modified,x,y,unionOfDets));
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if (oldModified || modified || ubevent)
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GECODE_ES_CHECK(RelOp::partitionNYUB(home,modified,x,y,unionOfDets));
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if (oldModified || modified || anybevent)
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GECODE_ES_CHECK(RelOp::partitionNXiLB(home,modified,x,y,unionOfDets));
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if (oldModified || modified || cardevent || ubevent)
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GECODE_ES_CHECK(RelOp::partitionNCard(home,modified,x,y,unionOfDets));
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} while (modified);
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for (int i=x.size(); i--;)
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if (!x[i].assigned())
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return ES_FIX;
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return home.ES_SUBSUMED(*this);
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}
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}}}
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// STATISTICS: set-prop
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