/usr/include/gecode/int/nvalues/bool-gq.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 NValues {
template<class VY>
forceinline
GqBool<VY>::GqBool(Home home, int status, ViewArray<BoolView>& x, VY y)
: BoolBase<VY>(home,status,x,y) {}
template<class VY>
forceinline
GqBool<VY>::GqBool(Space& home, bool share, GqBool<VY>& p)
: BoolBase<VY>(home,share,p) {}
template<class VY>
Actor*
GqBool<VY>::copy(Space& home, bool share) {
return new (home) GqBool<VY>(home,share,*this);
}
template<class VY>
inline ExecStatus
GqBool<VY>::post(Home home, ViewArray<BoolView>& x, VY y) {
if (x.size() == 0) {
GECODE_ME_CHECK(y.lq(home,0));
return ES_OK;
}
x.unique(home);
if (x.size() == 1) {
GECODE_ME_CHECK(y.lq(home,1));
return ES_OK;
}
GECODE_ME_CHECK(y.lq(home,2));
if (y.max() <= 1)
return ES_OK;
if (y.min() == 2) {
assert(y.assigned());
ViewArray<BoolView> xc(home,x);
return Rel::NaryNq<BoolView>::post(home,xc);
}
int n = x.size();
int status = 0;
for (int i=n; i--; )
if (x[i].zero()) {
if (status & VS_ONE)
return ES_OK;
x[i] = x[--n];
status |= VS_ZERO;
} else if (x[i].one()) {
if (status & VS_ZERO)
return ES_OK;
x[i] = x[--n];
status |= VS_ONE;
}
assert(status != (VS_ZERO | VS_ONE));
if (n == 0) {
assert(status != 0);
GECODE_ME_CHECK(y.lq(home,1));
return ES_OK;
}
x.size(n);
(void) new (home) GqBool<VY>(home,status,x,y);
return ES_OK;
}
template<class VY>
ExecStatus
GqBool<VY>::propagate(Space& home, const ModEventDelta&) {
if (status == (VS_ZERO | VS_ONE))
return home.ES_SUBSUMED(*this);
if (c.empty()) {
assert(status != 0);
GECODE_ME_CHECK(y.lq(home,1));
return home.ES_SUBSUMED(*this);
}
if (y.max() <= 1)
return home.ES_SUBSUMED(*this);
if (y.min() == 2) {
Advisors<ViewAdvisor<BoolView> > as(c);
assert(as());
ViewAdvisor<BoolView>& a(as.advisor());
++as;
if (!as()) {
// Only a single view is left
if (status == VS_ZERO) {
GECODE_ME_CHECK(a.view().one(home));
} else if (status == VS_ONE) {
GECODE_ME_CHECK(a.view().zero(home));
} else {
return ES_FAILED;
}
return home.ES_SUBSUMED(*this);
}
}
return ES_FIX;
}
}}}
// STATISTICS: int-prop
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