/usr/include/gecode/int/linear/bool-view.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, 2004
*
* Last modified:
* $Date: 2010-03-03 17:32:21 +0100 (Wed, 03 Mar 2010) $ by $Author: schulte $
* $Revision: 10364 $
*
* 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 Int { namespace Linear {
/*
* Base-class
*
*/
template<class XV, class YV>
LinBoolView<XV,YV>::LinBoolView(Home home,
ViewArray<XV>& x0, YV y0, int c0)
: Propagator(home), x(x0), y(y0), c(c0) {
x.subscribe(home,*this,PC_INT_VAL);
y.subscribe(home,*this,PC_INT_BND);
}
template<class XV, class YV>
forceinline size_t
LinBoolView<XV,YV>::dispose(Space& home) {
x.cancel(home,*this,PC_INT_VAL);
y.cancel(home,*this,PC_INT_BND);
(void) Propagator::dispose(home);
return sizeof(*this);
}
template<class XV, class YV>
forceinline
LinBoolView<XV,YV>::LinBoolView(Space& home, bool share, LinBoolView& p)
: Propagator(home,share,p), c(p.c) {
x.update(home,share,p.x);
y.update(home,share,p.y);
}
template<class XV, class YV>
PropCost
LinBoolView<XV,YV>::cost(const Space&, const ModEventDelta&) const {
return PropCost::linear(PropCost::LO, x.size());
}
/*
* Equality propagator
*
*/
template<class XV, class YV>
forceinline
EqBoolView<XV,YV>::EqBoolView(Home home, ViewArray<XV>& x, YV y, int c)
: LinBoolView<XV,YV>(home,x,y,c) {}
template<class XV, class YV>
ExecStatus
EqBoolView<XV,YV>::post(Home home, ViewArray<XV>& x, YV y, int c) {
if (y.assigned())
return EqBoolInt<XV>::post(home,x,y.val()+c);
int n = x.size();
for (int i = n; i--; )
if (x[i].one()) {
x[i]=x[--n]; c--;
} else if (x[i].zero()) {
x[i]=x[--n];
}
x.size(n);
GECODE_ME_CHECK(y.lq(home,n-c));
GECODE_ME_CHECK(y.gq(home,-c));
if (n == 0)
return ES_OK;
if (y.min()+c == n) {
assert(y.assigned());
for (int i = n; i--; )
GECODE_ME_CHECK(x[i].one_none(home));
return ES_OK;
}
if (y.max()+c == 0) {
assert(y.assigned());
for (int i = n; i--; )
GECODE_ME_CHECK(x[i].zero_none(home));
return ES_OK;
}
(void) new (home) EqBoolView<XV,YV>(home,x,y,c);
return ES_OK;
}
template<class XV, class YV>
forceinline
EqBoolView<XV,YV>::EqBoolView(Space& home, bool share, EqBoolView<XV,YV>& p)
: LinBoolView<XV,YV>(home,share,p) {}
template<class XV, class YV>
Actor*
EqBoolView<XV,YV>::copy(Space& home, bool share) {
return new (home) EqBoolView<XV,YV>(home,share,*this);
}
template<class XV, class YV>
ExecStatus
EqBoolView<XV,YV>::propagate(Space& home, const ModEventDelta&) {
int n = x.size();
for (int i = n; i--; )
if (x[i].one()) {
x[i]=x[--n]; c--;
} else if (x[i].zero()) {
x[i]=x[--n];
}
x.size(n);
GECODE_ME_CHECK(y.lq(home,n-c));
GECODE_ME_CHECK(y.gq(home,-c));
if (n == 0)
return home.ES_SUBSUMED(*this);
if (y.min()+c == n) {
assert(y.assigned());
for (int i = n; i--; )
GECODE_ME_CHECK(x[i].one_none(home));
return home.ES_SUBSUMED(*this);
}
if (y.max()+c == 0) {
assert(y.assigned());
for (int i = n; i--; )
GECODE_ME_CHECK(x[i].zero_none(home));
return home.ES_SUBSUMED(*this);
}
if (y.assigned())
GECODE_REWRITE(*this,EqBoolInt<XV>::post(home(*this),x,y.val()+c));
return ES_FIX;
}
/*
* Disequality propagator
*
*/
template<class XV, class YV>
forceinline
NqBoolView<XV,YV>::NqBoolView(Home home, ViewArray<XV>& x, YV y, int c)
: LinBoolView<XV,YV>(home,x,y,c) {}
template<class XV, class YV>
ExecStatus
NqBoolView<XV,YV>::post(Home home, ViewArray<XV>& x, YV y, int c) {
if (y.assigned())
return NqBoolInt<XV>::post(home,x,y.val()+c);
int n = x.size();
for (int i = n; i--; )
if (x[i].one()) {
x[i]=x[--n]; c--;
} else if (x[i].zero()) {
x[i]=x[--n];
}
x.size(n);
if ((n-c < y.min() ) || (-c > y.max()))
return ES_OK;
if (n == 0) {
GECODE_ME_CHECK(y.nq(home,-c));
return ES_OK;
}
if ((n == 1) && y.assigned()) {
if (y.val()+c == 1) {
GECODE_ME_CHECK(x[0].zero_none(home));
} else {
assert(y.val()+c == 0);
GECODE_ME_CHECK(x[0].one_none(home));
}
return ES_OK;
}
(void) new (home) NqBoolView<XV,YV>(home,x,y,c);
return ES_OK;
}
template<class XV, class YV>
forceinline
NqBoolView<XV,YV>::NqBoolView(Space& home, bool share, NqBoolView<XV,YV>& p)
: LinBoolView<XV,YV>(home,share,p) {}
template<class XV, class YV>
Actor*
NqBoolView<XV,YV>::copy(Space& home, bool share) {
return new (home) NqBoolView<XV,YV>(home,share,*this);
}
template<class XV, class YV>
ExecStatus
NqBoolView<XV,YV>::propagate(Space& home, const ModEventDelta&) {
int n = x.size();
for (int i = n; i--; )
if (x[i].one()) {
x[i]=x[--n]; c--;
} else if (x[i].zero()) {
x[i]=x[--n];
}
x.size(n);
if ((n-c < y.min() ) || (-c > y.max()))
return home.ES_SUBSUMED(*this);
if (n == 0) {
GECODE_ME_CHECK(y.nq(home,-c));
return home.ES_SUBSUMED(*this);
}
if ((n == 1) && y.assigned()) {
if (y.val()+c == 1) {
GECODE_ME_CHECK(x[0].zero_none(home));
} else {
assert(y.val()+c == 0);
GECODE_ME_CHECK(x[0].one_none(home));
}
return home.ES_SUBSUMED(*this);
}
return ES_FIX;
}
/*
* Greater or equal propagator
*
*/
template<class XV, class YV>
forceinline
GqBoolView<XV,YV>::GqBoolView(Home home, ViewArray<XV>& x, YV y, int c)
: LinBoolView<XV,YV>(home,x,y,c) {}
template<class XV, class YV>
ExecStatus
GqBoolView<XV,YV>::post(Home home, ViewArray<XV>& x, YV y, int c) {
if (y.assigned())
return GqBoolInt<XV>::post(home,x,y.val()+c);
// Eliminate assigned views
int n = x.size();
for (int i = n; i--; )
if (x[i].one()) {
x[i]=x[--n]; c--;
} else if (x[i].zero()) {
x[i]=x[--n];
}
x.size(n);
GECODE_ME_CHECK(y.lq(home,n-c));
if (-c >= y.max())
return ES_OK;
if (y.min()+c == n) {
for (int i = n; i--; )
GECODE_ME_CHECK(x[i].one_none(home));
return ES_OK;
}
(void) new (home) GqBoolView<XV,YV>(home,x,y,c);
return ES_OK;
}
template<class XV, class YV>
forceinline
GqBoolView<XV,YV>::GqBoolView(Space& home, bool share, GqBoolView<XV,YV>& p)
: LinBoolView<XV,YV>(home,share,p) {}
template<class XV, class YV>
Actor*
GqBoolView<XV,YV>::copy(Space& home, bool share) {
return new (home) GqBoolView<XV,YV>(home,share,*this);
}
template<class XV, class YV>
ExecStatus
GqBoolView<XV,YV>::propagate(Space& home, const ModEventDelta&) {
int n = x.size();
for (int i = n; i--; )
if (x[i].one()) {
x[i]=x[--n]; c--;
} else if (x[i].zero()) {
x[i]=x[--n];
}
x.size(n);
GECODE_ME_CHECK(y.lq(home,n-c));
if (-c >= y.max())
return home.ES_SUBSUMED(*this);
if (y.min()+c == n) {
for (int i = n; i--; )
GECODE_ME_CHECK(x[i].one_none(home));
return home.ES_SUBSUMED(*this);
}
if (y.assigned())
GECODE_REWRITE(*this,GqBoolInt<XV>::post(home(*this),x,y.val()+c));
return ES_FIX;
}
}}}
// STATISTICS: int-prop
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