/usr/include/gecode/int/member/re-prop.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:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2011
*
* Last modified:
* $Date: 2012-09-07 17:31:22 +0200 (Fri, 07 Sep 2012) $ by $Author: schulte $
* $Revision: 13068 $
*
* 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.
*
*/
#include <gecode/int/rel.hh>
namespace Gecode { namespace Int { namespace Member {
template<class View, ReifyMode rm>
forceinline
ReProp<View,rm>::ReProp(Home home, ValSet& vs, ViewArray<View>& x, View y,
BoolView b0)
: Prop<View>(home,vs,x,y), b(b0) {
b.subscribe(home,*this,PC_BOOL_VAL);
}
template<class View, ReifyMode rm>
inline ExecStatus
ReProp<View,rm>::post(Home home, ViewArray<View>& x, View y, BoolView b) {
if (x.size() == 0) {
if (rm != RM_PMI)
GECODE_ME_CHECK(b.zero(home));
return ES_OK;
}
x.unique(home);
if (x.size() == 1)
return Rel::ReEqDom<View,BoolView,rm>::post(home,x[0],y,b);
if (x.same(home,y)) {
if (rm != RM_IMP)
GECODE_ME_CHECK(b.one(home));
return ES_OK;
}
// Eliminate assigned views and store them into the value set
ValSet vs;
add(home, vs, x);
switch (vs.compare(y)) {
case Iter::Ranges::CS_SUBSET:
if (rm != RM_IMP)
GECODE_ME_CHECK(b.one(home));
return ES_OK;
case Iter::Ranges::CS_DISJOINT:
if (x.size() == 0) {
if (rm != RM_PMI)
GECODE_ME_CHECK(b.zero(home));
return ES_OK;
}
break;
case Iter::Ranges::CS_NONE:
break;
default:
GECODE_NEVER;
}
(void) new (home) ReProp<View,rm>(home, vs, x, y, b);
return ES_OK;
}
template<class View, ReifyMode rm>
forceinline
ReProp<View,rm>::ReProp(Space& home, bool share, ReProp<View,rm>& p)
: Prop<View>(home, share, p) {
b.update(home, share, p.b);
}
template<class View, ReifyMode rm>
Propagator*
ReProp<View,rm>::copy(Space& home, bool share) {
return new (home) ReProp<View,rm>(home, share, *this);
}
template<class View, ReifyMode rm>
forceinline size_t
ReProp<View,rm>::dispose(Space& home) {
b.cancel(home, *this, PC_BOOL_VAL);
(void) Prop<View>::dispose(home);
return sizeof(*this);
}
template<class View, ReifyMode rm>
ExecStatus
ReProp<View,rm>::propagate(Space& home, const ModEventDelta& med) {
// Add assigned views to value set
if (View::me(med) == ME_INT_VAL)
add(home,vs,x);
if (b.one()) {
if (rm == RM_PMI)
return home.ES_SUBSUMED(*this);
ValSet vsc(vs);
vs.flush();
GECODE_REWRITE(*this,Prop<View>::post(home,vsc,x,y));
}
if (b.zero()) {
if (rm != RM_IMP) {
ValSet::Ranges vsr(vs);
GECODE_ME_CHECK(y.minus_r(home,vsr,false));
for (int i=x.size(); i--; )
GECODE_ES_CHECK(Rel::Nq<View>::post(home,x[i],y));
}
return home.ES_SUBSUMED(*this);
}
// Eliminate views from x
eliminate(home);
switch (vs.compare(y)) {
case Iter::Ranges::CS_SUBSET:
if (rm != RM_IMP)
GECODE_ME_CHECK(b.one(home));
return home.ES_SUBSUMED(*this);
case Iter::Ranges::CS_DISJOINT:
if (x.size() == 0) {
if (rm != RM_PMI)
GECODE_ME_CHECK(b.zero(home));
return home.ES_SUBSUMED(*this);
}
break;
case Iter::Ranges::CS_NONE:
break;
default:
GECODE_NEVER;
}
// Check whether y is in union of x and value set
if (x.size() > 0) {
Region r(home);
ValSet::Ranges vsr(vs);
ViewRanges<View> xsr(x[x.size()-1]);
Iter::Ranges::NaryUnion u(r,vsr,xsr);
for (int i=x.size()-1; i--; ) {
ViewRanges<View> xir(x[i]);
u |= xir;
}
ViewRanges<View> yr(y);
if (Iter::Ranges::disjoint(u,yr)) {
if (rm != RM_PMI)
GECODE_ME_CHECK(b.zero(home));
return home.ES_SUBSUMED(*this);
}
}
return ES_FIX;
}
}}}
// STATISTICS: int-prop
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