/usr/include/gecode/set/rel/re-subset.hpp is in libgecode-dev 4.4.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* Main authors:
* Guido Tack <tack@gecode.org>
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Guido Tack, 2004
* Christian Schulte, 2004
*
* Last modified:
* $Date: 2012-10-19 05:58:26 +0200 (Fri, 19 Oct 2012) $ by $Author: tack $
* $Revision: 13156 $
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
namespace Gecode { namespace Set { namespace Rel {
template<class View0, class View1, ReifyMode rm>
forceinline
ReSubset<View0,View1,rm>::ReSubset(Home home, View0 y0,
View1 y1, Gecode::Int::BoolView y2)
: Propagator(home), x0(y0), x1(y1), b(y2) {
b.subscribe(home,*this, Gecode::Int::PC_INT_VAL);
x0.subscribe(home,*this, PC_SET_ANY);
x1.subscribe(home,*this, PC_SET_ANY);
}
template<class View0, class View1, ReifyMode rm>
forceinline
ReSubset<View0,View1,rm>::ReSubset(Space& home, bool share, ReSubset& p)
: Propagator(home,share,p) {
x0.update(home,share,p.x0);
x1.update(home,share,p.x1);
b.update(home,share,p.b);
}
template<class View0, class View1, ReifyMode rm>
PropCost
ReSubset<View0,View1,rm>::cost(const Space&, const ModEventDelta&) const {
return PropCost::ternary(PropCost::LO);
}
template<class View0, class View1, ReifyMode rm>
forceinline size_t
ReSubset<View0,View1,rm>::dispose(Space& home) {
b.cancel(home,*this, Gecode::Int::PC_INT_VAL);
x0.cancel(home,*this, PC_SET_ANY);
x1.cancel(home,*this, PC_SET_ANY);
(void) Propagator::dispose(home);
return sizeof(*this);
}
template<class View0, class View1, ReifyMode rm>
ExecStatus
ReSubset<View0,View1,rm>::post(Home home, View0 x0, View1 x1,
Gecode::Int::BoolView b) {
(void) new (home) ReSubset<View0,View1,rm>(home,x0,x1,b);
return ES_OK;
}
template<class View0, class View1, ReifyMode rm>
Actor*
ReSubset<View0,View1,rm>::copy(Space& home, bool share) {
return new (home) ReSubset<View0,View1,rm>(home,share,*this);
}
template<class View0, class View1, ReifyMode rm>
ExecStatus
ReSubset<View0,View1,rm>::propagate(Space& home, const ModEventDelta&) {
if (b.one()) {
if (rm == RM_PMI)
return home.ES_SUBSUMED(*this);
GECODE_REWRITE(*this,(Subset<View0,View1>::post(home(*this),x0,x1)));
}
if (b.zero()) {
if (rm == RM_IMP)
return home.ES_SUBSUMED(*this);
GECODE_REWRITE(*this,(NoSubset<View0,View1>::post(home(*this),x0,x1)));
}
// check whether cardinalities still allow subset
if (x0.cardMin() > x1.cardMax()) {
if (rm != RM_PMI)
GECODE_ME_CHECK(b.zero_none(home));
return home.ES_SUBSUMED(*this);
}
// check lub(x0) subset glb(x1)
{
LubRanges<View0> x0ub(x0);
GlbRanges<View1> x1lb(x1);
Iter::Ranges::Diff<LubRanges<View0>,GlbRanges<View1> > d(x0ub,x1lb);
if (!d()) {
if (rm != RM_IMP)
GECODE_ME_CHECK(b.one_none(home));
return home.ES_SUBSUMED(*this);
}
}
// check glb(x0) subset lub(x1)
{
GlbRanges<View0> x0lb(x0);
LubRanges<View1> x1ub(x1);
Iter::Ranges::Diff<GlbRanges<View0>,LubRanges<View1> > d(x0lb,x1ub);
if (d()) {
if (rm != RM_PMI)
GECODE_ME_CHECK(b.zero_none(home));
return home.ES_SUBSUMED(*this);
} else if (x0.assigned() && x1.assigned()) {
if (rm != RM_IMP)
GECODE_ME_CHECK(b.one_none(home));
return home.ES_SUBSUMED(*this);
}
}
if (x0.cardMin() > 0) {
LubRanges<View0> x0ub(x0);
LubRanges<View1> x1ub(x1);
Iter::Ranges::Inter<LubRanges<View0>,LubRanges<View1> >
i(x0ub,x1ub);
if (!i()) {
if (rm != RM_PMI)
GECODE_ME_CHECK(b.zero_none(home));
return home.ES_SUBSUMED(*this);
}
}
return ES_FIX;
}
}}}
// STATISTICS: set-prop
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