Jip J. Dekker
3e72b0e857
git-subtree-dir: software/gecode_on_record git-subtree-split: 37ed9bda495ea87e63217c19a374b5a93bb0078e
87 lines
2.8 KiB
C++
Executable File
87 lines
2.8 KiB
C++
Executable File
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2019
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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/int/order.hh>
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namespace Gecode { namespace Int { namespace Order {
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Actor*
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OrderProp::copy(Space& home) {
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return new (home) OrderProp(home,*this);
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}
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PropCost
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OrderProp::cost(const Space&, const ModEventDelta&) const {
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return PropCost::binary(PropCost::LO);
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}
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void
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OrderProp::reschedule(Space& home) {
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s0.reschedule(home,*this,PC_INT_BND);
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s1.reschedule(home,*this,PC_INT_BND);
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b.reschedule(home,*this,PC_INT_VAL);
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}
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ExecStatus
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OrderProp::propagate(Space& home, const ModEventDelta&) {
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if (s0.max() + p0 <= s1.min()) {
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GECODE_ME_CHECK(b.zero(home));
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return home.ES_SUBSUMED(*this);
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} else if (s1.max() + p1 <= s0.min()) {
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GECODE_ME_CHECK(b.one(home));
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return home.ES_SUBSUMED(*this);
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} else if ((s1.min() + p1 > s0.max()) || b.zero()) {
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GECODE_ME_CHECK(b.zero(home));
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GECODE_REWRITE(*this,(Rel::Lq<OffsetView,IntView>::post
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(home(*this),OffsetView(s0,p0),s1)));
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} else if ((s0.min() + p0 > s1.max()) || b.one()) {
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GECODE_ME_CHECK(b.one(home));
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GECODE_REWRITE(*this,(Rel::Lq<OffsetView,IntView>::post
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(home(*this),OffsetView(s1,p1),s0)));
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}
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return ES_FIX;
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}
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size_t
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OrderProp::dispose(Space& home) {
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s0.cancel(home,*this,PC_INT_BND);
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s1.cancel(home,*this,PC_INT_BND);
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b.cancel(home,*this,PC_INT_VAL);
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(void) Propagator::dispose(home);
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return sizeof(*this);
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}
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}}}
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// STATISTICS: int-prop
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