291 lines
8.8 KiB
C++
291 lines
8.8 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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*
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* Copyright:
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* Guido Tack, 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/int.hh>
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namespace Gecode { namespace Set { namespace Channel {
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template<class View>
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template<class A>
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forceinline
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ChannelBool<View>::IndexAdvisor::IndexAdvisor(Space& home,
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ChannelBool<View>& p,
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Council<A>& c, int index)
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: Advisor(home,p,c), idx(index) {
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if (idx == -1)
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p.y.subscribe(home,*this);
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else {
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p.x[idx].subscribe(home,*this);
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}
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}
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template<class View>
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forceinline
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ChannelBool<View>::IndexAdvisor::IndexAdvisor(Space& home, IndexAdvisor& a)
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: Advisor(home,a), idx(a.idx) {}
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template<class View>
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forceinline int
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ChannelBool<View>::IndexAdvisor::index(void) const {
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return idx;
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}
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template<class View>
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template<class A>
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forceinline void
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ChannelBool<View>::IndexAdvisor::dispose(Space& home, Council<A>& c) {
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ChannelBool<View>& p = static_cast<ChannelBool<View>&>(propagator());
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if (idx == -1)
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p.y.cancel(home,*this);
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else {
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p.x[idx].cancel(home,*this);
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}
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Advisor::dispose(home,c);
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}
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template<class View>
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forceinline
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ChannelBool<View>::ChannelBool(Home home,
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ViewArray<Gecode::Int::BoolView>& x0,
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View y0)
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: Super(home,x0,y0), co(home), running(false) {
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bool assigned = false;
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for (int i=x.size(); i--;) {
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if (x[i].zero()) {
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assigned = true;
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SetDelta d;
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zeros.include(home, i, i, d);
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} else if (x[i].one()) {
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assigned = true;
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SetDelta d;
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ones.include(home, i, i, d);
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} else {
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(void) new (home) IndexAdvisor(home,*this,co,i);
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}
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}
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if (assigned)
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Gecode::Int::BoolView::schedule(home, *this, Gecode::Int::ME_BOOL_VAL);
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View::schedule(home, *this, y.assigned() ? ME_SET_VAL : ME_SET_BB);
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if (y.assigned()) {
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if (y.glbSize()==static_cast<unsigned int>(y.glbMax()-y.glbMin()+1)) {
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new (&delta) SetDelta(y.glbMin(),y.glbMax(),2,0);
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} else {
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new (&delta) SetDelta(2,0,2,0);
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}
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}
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(void) new (home) IndexAdvisor(home,*this,co,-1);
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}
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template<class View>
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forceinline
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ChannelBool<View>::ChannelBool(Space& home, ChannelBool& p)
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: Super(home,p), running(false) {
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co.update(home, p.co);
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}
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template<class View>
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forceinline ExecStatus
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ChannelBool<View>::post(Home home, ViewArray<Gecode::Int::BoolView>& x,
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View y) {
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GECODE_ME_CHECK(y.intersect(home, 0, x.size()-1));
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(void) new (home) ChannelBool(home,x,y);
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return ES_OK;
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}
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template<class View>
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PropCost
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ChannelBool<View>::cost(const Space&, const ModEventDelta&) const {
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return PropCost::quadratic(PropCost::LO, x.size()+1);
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}
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template<class View>
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void
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ChannelBool<View>::reschedule(Space& home) {
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x.reschedule(home,*this,Gecode::Int::PC_BOOL_VAL);
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View::schedule(home, *this, y.assigned() ? ME_SET_VAL : ME_SET_BB);
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}
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template<class View>
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forceinline size_t
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ChannelBool<View>::dispose(Space& home) {
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co.dispose(home);
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(void) Super::dispose(home);
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return sizeof(*this);
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}
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template<class View>
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Actor*
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ChannelBool<View>::copy(Space& home) {
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return new (home) ChannelBool(home,*this);
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}
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template<class View>
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ExecStatus
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ChannelBool<View>::propagate(Space& home, const ModEventDelta&) {
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running = true;
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if (zeros.size() > 0) {
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BndSetRanges zi(zeros);
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GECODE_ME_CHECK(y.excludeI(home, zi));
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zeros.init(home);
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}
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if (ones.size() > 0) {
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BndSetRanges oi(ones);
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GECODE_ME_CHECK(y.includeI(home, oi));
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ones.init(home);
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}
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running = false;
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if (delta.glbMin() != 1 || delta.glbMax() != 0) {
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if (!delta.glbAny()) {
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for (int i=delta.glbMin(); i<=delta.glbMax(); i++)
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GECODE_ME_CHECK(x[i].one(home));
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} else {
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GlbRanges<View> glb(y);
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for (Iter::Ranges::ToValues<GlbRanges<View> > gv(glb); gv(); ++gv) {
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GECODE_ME_CHECK(x[gv.val()].one(home));
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}
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}
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}
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if (delta.lubMin() != 1 || delta.lubMax() != 0) {
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if (!delta.lubAny()) {
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for (int i=delta.lubMin(); i<=delta.lubMax(); i++)
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GECODE_ME_CHECK(x[i].zero(home));
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} else {
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int cur = 0;
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for (LubRanges<View> lub(y); lub(); ++lub) {
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for (; cur < lub.min(); cur++) {
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GECODE_ME_CHECK(x[cur].zero(home));
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}
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cur = lub.max() + 1;
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}
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for (; cur < x.size(); cur++) {
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GECODE_ME_CHECK(x[cur].zero(home));
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}
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}
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}
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new (&delta) SetDelta();
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return y.assigned() ? home.ES_SUBSUMED(*this) : ES_FIX;
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}
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template<class View>
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ExecStatus
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ChannelBool<View>::advise(Space& home, Advisor& _a, const Delta& _d) {
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IndexAdvisor& a = static_cast<IndexAdvisor&>(_a);
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const SetDelta& d = static_cast<const SetDelta&>(_d);
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ModEvent me = View::modevent(d);
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int index = a.index();
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if ( (running && index == -1 && me != ME_SET_VAL)
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|| (index == -1 && me == ME_SET_CARD) ) {
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return ES_OK;
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}
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if (index >= 0) {
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if (x[index].zero()) {
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SetDelta dummy;
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zeros.include(home, index, index, dummy);
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} else {
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assert(x[index].one());
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SetDelta dummy;
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ones.include(home, index, index, dummy);
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}
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return home.ES_NOFIX_DISPOSE( co, a);
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}
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if ((a.index() == -1) && Rel::testSetEventLB(me)) {
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if (d.glbAny()) {
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new (&delta)
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SetDelta(2,0, delta.lubMin(), delta.lubMax());
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} else {
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if (delta.glbMin() == 1 && delta.glbMax() == 0) {
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new (&delta)
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SetDelta(d.glbMin(), d.glbMax(),
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delta.lubMin(), delta.lubMax());
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} else {
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if (delta.glbMin() != 2 || delta.glbMax() != 0) {
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if ((delta.glbMin() <= d.glbMin() && delta.glbMax() >= d.glbMin())
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||
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(delta.glbMin() <= d.glbMax() && delta.glbMax() >= d.glbMax())
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) {
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new (&delta)
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SetDelta(std::min(delta.glbMin(), d.glbMin()),
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std::max(delta.glbMax(), d.glbMax()),
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delta.lubMin(), delta.lubMax());
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} else {
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new (&delta)
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SetDelta(2, 0, delta.lubMin(), delta.lubMax());
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}
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}
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}
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}
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}
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if ((a.index() == -1) && Rel::testSetEventUB(me)) {
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if (d.lubAny()) {
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new (&delta)
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SetDelta(delta.glbMin(), delta.glbMax(), 2,0);
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} else {
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if (delta.lubMin() == 1 && delta.lubMax() == 0) {
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new (&delta)
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SetDelta(delta.glbMin(), delta.glbMax(),
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d.lubMin(), d.lubMax());
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} else {
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if (delta.lubMin() != 2 || delta.lubMax() != 0) {
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if ((delta.lubMin() <= d.lubMin() && delta.lubMax() >= d.lubMin())
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||
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(delta.lubMin() <= d.lubMax() && delta.lubMax() >= d.lubMax())
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) {
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new (&delta)
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SetDelta(delta.lubMin(), delta.lubMax(),
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std::min(delta.lubMin(), d.lubMin()),
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std::max(delta.lubMax(), d.lubMax())
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);
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} else {
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new (&delta)
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SetDelta(delta.glbMin(), delta.glbMax(), 2, 0);
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}
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}
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}
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}
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}
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if (y.assigned())
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return home.ES_NOFIX_DISPOSE( co, a);
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else
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return ES_NOFIX;
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}
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}}}
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// STATISTICS: set-prop
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