106 lines
3.4 KiB
C++
106 lines
3.4 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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* Vincent Barichard <Vincent.Barichard@univ-angers.fr>
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*
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* Copyright:
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* Vincent Barichard, 2013
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*
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* Last modified:
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* $Date$ by $Author$
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* $Revision$
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*
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* This file is part of Quacode:
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* http://quacode.barichard.com
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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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namespace Gecode { namespace Int {
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template<class View>
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forceinline
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Watch<View>::Watch(Home home, View x0, View x1, unsigned int _x0Size)
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: BinaryPropagator<View,PC_INT_DOM>(home,x0,x1), x0Size(_x0Size) {
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dynamic_cast<QSpaceInfo&>((Space&)home).addWatchConstraint();
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}
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template<class View>
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ExecStatus
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Watch<View>::post(Home home, View x0, View x1, unsigned int _x0Size) {
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if (x0.size() != _x0Size) {
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return ES_FAILED;
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} else if (x1.assigned()) {
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GECODE_ME_CHECK(x0.eq(home,x1.val()));
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} else {
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assert(!same(x0,x1));
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GECODE_ME_CHECK(x0.lq(home,x1.max()));
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GECODE_ME_CHECK(x1.lq(home,x0.max()));
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GECODE_ME_CHECK(x0.gq(home,x1.min()));
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GECODE_ME_CHECK(x1.gq(home,x0.min()));
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assert(x0.size() == x1.size());
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(void) new (home) Watch<View>(home,x0,x1,_x0Size);
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}
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return ES_OK;
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}
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template<class View>
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forceinline
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Watch<View>::Watch(Space& home, bool share, Watch<View>& p)
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: BinaryPropagator<View,PC_INT_DOM>(home,share,p), x0Size(p.x0Size) {}
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template<class View>
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Actor*
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Watch<View>::copy(Space& home,bool share) {
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return new (home) Watch<View>(home,share,*this);
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}
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template<class View>
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PropCost
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Watch<View>::cost(const Space&, const ModEventDelta&) const {
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return PropCost::unary(PropCost::LO);
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}
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template<class View>
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ExecStatus
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Watch<View>::propagate(Space& home, const ModEventDelta&) {
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if (x0.size() != x0Size) return ES_FAILED;
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if (x1.assigned()) {
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GECODE_ME_CHECK(x0.eq(home,x1.val()));
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dynamic_cast<QSpaceInfo&>((Space&)home).delWatchConstraint();
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return home.ES_SUBSUMED(*this);
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}
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ViewRanges<View> r0(x0);
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GECODE_ME_CHECK(x1.inter_r(home,r0,shared(x0,x1)));
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ViewRanges<View> r1(x1);
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GECODE_ME_CHECK(x0.narrow_r(home,r1,shared(x0,x1)));
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if (x0.assigned()) {
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dynamic_cast<QSpaceInfo&>((Space&)home).delWatchConstraint();
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return home.ES_SUBSUMED(*this);
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}
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assert(x0.size() == x1.size());
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x0Size = x0.size();
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return ES_FIX;
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}
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}}
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// STATISTICS: int-prop
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