/usr/include/gecode/int/branch/view-values.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, 2008
*
* Last modified:
* $Date: 2013-07-04 17:03:13 +0200 (Thu, 04 Jul 2013) $ by $Author: schulte $
* $Revision: 13801 $
*
* 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 Branch {
/// %Choice storing position and values for integer views
class GECODE_VTABLE_EXPORT PosValuesChoice : public PosChoice {
private:
/// Information about position and minimum
class PosMin {
public:
/// Start position of range
unsigned int pos;
/// Minmum of range
int min;
};
/// Number of ranges
unsigned int n;
/// Values to assign to
PosMin* pm;
public:
/// Initialize choice for brancher \a b, position \a p, and view \a x
GECODE_INT_EXPORT
PosValuesChoice(const Brancher& b, const Pos& p, IntView x);
/// Initialize choice for brancher \a b from archive \a e
GECODE_INT_EXPORT
PosValuesChoice(const Brancher& b, unsigned int alt, Pos p, Archive& e);
/// Return value to branch with for alternative \a a
int val(unsigned int a) const;
/// Report size occupied
GECODE_INT_EXPORT
virtual size_t size(void) const;
/// Deallocate
GECODE_INT_EXPORT
virtual ~PosValuesChoice(void);
/// Archive into \a e
GECODE_INT_EXPORT
virtual void archive(Archive& e) const;
};
forceinline int
PosValuesChoice::val(unsigned int a) const {
PosMin* l = &pm[0];
PosMin* r = &pm[n-1];
while (true) {
PosMin* m = l + (r-l)/2;
if (a < m->pos) {
r=m-1;
} else if (a >= (m+1)->pos) {
l=m+1;
} else {
return m->min + static_cast<int>(a - m->pos);
}
}
GECODE_NEVER;
return 0;
}
template<int n, bool min>
forceinline
ViewValuesBrancher<n,min>::
ViewValuesBrancher(Home home, ViewArray<IntView>& x,
ViewSel<IntView>* vs[n],
BranchFilter bf, IntVarValPrint vvp0)
: ViewBrancher<IntView,n>(home,x,vs,bf), vvp(vvp0) {}
template<int n, bool min>
BrancherHandle
ViewValuesBrancher<n,min>::post(Home home, ViewArray<IntView>& x,
ViewSel<IntView>* vs[n],
BranchFilter bf, IntVarValPrint vvp) {
return *new (home) ViewValuesBrancher<n,min>(home,x,vs,bf,vvp);
}
template<int n, bool min>
forceinline
ViewValuesBrancher<n,min>::
ViewValuesBrancher(Space& home, bool shared, ViewValuesBrancher& b)
: ViewBrancher<IntView,n>(home,shared,b), vvp(b.vvp) {}
template<int n, bool min>
Actor*
ViewValuesBrancher<n,min>::copy(Space& home, bool shared) {
return new (home) ViewValuesBrancher<n,min>(home,shared,*this);
}
template<int n, bool min>
const Choice*
ViewValuesBrancher<n,min>::choice(Space& home) {
Pos p = ViewBrancher<IntView,n>::pos(home);
return new PosValuesChoice(*this,p,
ViewBrancher<IntView,n>::view(p));
}
template<int n, bool min>
const Choice*
ViewValuesBrancher<n,min>::choice(const Space& home, Archive& e) {
(void) home;
int p;
unsigned int a;
e >> p >> a;
return new PosValuesChoice(*this,a,p,e);
}
template<int n, bool min>
ExecStatus
ViewValuesBrancher<n,min>::commit(Space& home, const Choice& c,
unsigned int a) {
const PosValuesChoice& pvc
= static_cast<const PosValuesChoice&>(c);
IntView x(ViewBrancher<IntView,n>::view(pvc.pos()));
unsigned int b = min ? a : (pvc.alternatives() - 1 - a);
return me_failed(x.eq(home,pvc.val(b))) ? ES_FAILED : ES_OK;
}
template<int n, bool min>
NGL*
ViewValuesBrancher<n,min>::ngl(Space& home, const Choice& c,
unsigned int a) const {
const PosValuesChoice& pvc
= static_cast<const PosValuesChoice&>(c);
IntView x(ViewBrancher<IntView,n>::view(pvc.pos()));
unsigned int b = min ? a : (pvc.alternatives() - 1 - a);
return new (home) EqNGL<IntView>(home,x,pvc.val(b));
}
template<int n, bool min>
void
ViewValuesBrancher<n,min>::print(const Space& home, const Choice& c,
unsigned int a, std::ostream& o) const {
const PosValuesChoice& pvc
= static_cast<const PosValuesChoice&>(c);
IntVar x(ViewBrancher<IntView,n>::view(pvc.pos()).varimp());
unsigned int b = min ? a : (pvc.alternatives() - 1 - a);
int nn = pvc.val(b);
if (vvp != NULL)
vvp(home,*this,a,x,pvc.pos().pos,nn,o);
else
o << "var[" << pvc.pos().pos << "] = " << nn;
}
}}}
// STATISTICS: int-branch
|