Jip J. Dekker
3e72b0e857
git-subtree-dir: software/gecode_on_record git-subtree-split: 37ed9bda495ea87e63217c19a374b5a93bb0078e
136 lines
4.0 KiB
C++
136 lines
4.0 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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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2003
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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 <climits>
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namespace Gecode { namespace Int { namespace Distinct {
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template<class View>
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forceinline
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Dom<View>::Dom(Home home, ViewArray<View>& x)
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: NaryPropagator<View,PC_INT_DOM>(home,x) {}
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template<class View>
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ExecStatus
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Dom<View>::post(Home home, ViewArray<View>& x) {
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if (x.size() == 2)
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return Rel::Nq<View,View>::post(home,x[0],x[1]);
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if (x.size() == 3)
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return TerDom<View>::post(home,x[0],x[1],x[2]);
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if (x.size() > 3) {
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// Do bounds propagation to make view-value graph smaller
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GECODE_ES_CHECK(prop_bnd<View>(home,x));
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(void) new (home) Dom<View>(home,x);
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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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Dom<View>::Dom(Space& home, Dom<View>& p)
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: NaryPropagator<View,PC_INT_DOM>(home,p) {}
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template<class View>
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PropCost
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Dom<View>::cost(const Space&, const ModEventDelta& med) const {
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if (View::me(med) == ME_INT_VAL)
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return PropCost::linear(PropCost::LO, x.size());
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else
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return PropCost::quadratic(PropCost::HI, x.size());
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}
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template<class View>
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Actor*
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Dom<View>::copy(Space& home) {
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return new (home) Dom<View>(home,*this);
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}
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#ifdef GECODE_HAS_CBS
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template<class View>
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void
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Dom<View>::solndistrib(Space& home, Propagator::SendMarginal send) const {
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cbsdistinct(home,this->id(),x,send);
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}
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template<class View>
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void
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Dom<View>::domainsizesum(Propagator::InDecision in, unsigned int& size,
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unsigned int& size_b) const {
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cbssize(x,in,size,size_b);
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}
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#endif
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template<class View>
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ExecStatus
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Dom<View>::propagate(Space& home, const ModEventDelta& med) {
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if (View::me(med) == ME_INT_VAL) {
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ExecStatus es = prop_val<View,false>(home,x);
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GECODE_ES_CHECK(es);
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if (x.size() < 2)
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return home.ES_SUBSUMED(*this);
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if (es == ES_FIX)
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return home.ES_FIX_PARTIAL(*this,View::med(ME_INT_DOM));
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es = prop_bnd<View>(home,x);
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GECODE_ES_CHECK(es);
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if (x.size() < 2)
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return home.ES_SUBSUMED(*this);
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es = prop_val<View,true>(home,x);
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GECODE_ES_CHECK(es);
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if (x.size() < 2)
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return home.ES_SUBSUMED(*this);
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return home.ES_FIX_PARTIAL(*this,View::med(ME_INT_DOM));
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}
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if (x.size() == 2)
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GECODE_REWRITE(*this,(Rel::Nq<View,View>::post(home(*this),x[0],x[1])));
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if (x.size() == 3)
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GECODE_REWRITE(*this,TerDom<View>::post(home(*this),x[0],x[1],x[2]));
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if (dc.available()) {
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GECODE_ES_CHECK(dc.sync());
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} else {
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GECODE_ES_CHECK(dc.init(home,x));
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}
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bool assigned;
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GECODE_ES_CHECK(dc.propagate(home,assigned));
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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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