/usr/include/gecode/kernel/branch-var.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, 2012
*
* Last modified:
* $Date: 2013-05-22 21:29:33 +0200 (Wed, 22 May 2013) $ by $Author: tack $
* $Revision: 13656 $
*
* 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 {
/**
* \brief Tie-break limit function
*
* Here the value \a w is the worst and \b is the best merit value
* found. The function must return the merit value that is considered
* the limit for breaking ties.
*
* \ingroup TaskModelBranch
*/
typedef double (*BranchTbl)(const Space& home, double w, double b);
/**
* \brief Variable branching information
* \ingroup TaskModelBranch
*/
class VarBranch {
protected:
/// Tie-breaking limit function
BranchTbl _tbl;
/// Random number generator
Rnd _rnd;
/// Decay information for AFC and activity
double _decay;
/// AFC information
AFC _afc;
/// Activity information
Activity _act;
/// Merit function (generic function pointer)
VoidFunction _mf;
public:
/// Initialize with tie-break limit function \a t
VarBranch(BranchTbl t);
/// Initialize with random number generator \a r
VarBranch(Rnd r);
/// Initialize with decay factor \a d and tie-break limit function \a t
VarBranch(double d, BranchTbl t);
/// Initialize with AFC \a a and tie-break limit function \a t
VarBranch(AFC a, BranchTbl t);
/// Initialize with activity \a a and tie-break limit function \a t
VarBranch(Activity a, BranchTbl t);
/// Initialize with merit function \a f and tie-break limit function \a t
VarBranch(void (*f)(void), BranchTbl t);
/// Return tie-break limit function
BranchTbl tbl(void) const;
/// Return random number generator
Rnd rnd(void) const;
/// Return decay factor
double decay(void) const;
/// Return AFC
AFC afc(void) const;
/// Set AFC to \a a
void afc(AFC a);
/// Return activity
Activity activity(void) const;
/// Set activity to \a a
void activity(Activity a);
/// Return merit function
VoidFunction merit(void) const;
};
// Variable branching
forceinline
VarBranch::VarBranch(BranchTbl t)
: _tbl(t), _decay(1.0) {}
forceinline
VarBranch::VarBranch(double d, BranchTbl t)
: _tbl(t), _decay(d) {}
forceinline
VarBranch::VarBranch(AFC a, BranchTbl t)
: _tbl(t), _decay(1.0), _afc(a) {
if (!_afc.initialized())
throw UninitializedAFC("VarBranch::VarBranch");
}
forceinline
VarBranch::VarBranch(Activity a, BranchTbl t)
: _tbl(t), _decay(1.0), _act(a) {
if (!_act.initialized())
throw UninitializedActivity("VarBranch::VarBranch");
}
forceinline
VarBranch::VarBranch(Rnd r)
: _tbl(NULL), _rnd(r), _decay(1.0) {
if (!_rnd.initialized())
throw UninitializedRnd("VarBranch::VarBranch");
}
forceinline
VarBranch::VarBranch(VoidFunction f, BranchTbl t)
: _tbl(t), _decay(1.0), _mf(f) {}
forceinline BranchTbl
VarBranch::tbl(void) const {
return _tbl;
}
inline Rnd
VarBranch::rnd(void) const {
return _rnd;
}
inline double
VarBranch::decay(void) const {
return _decay;
}
inline AFC
VarBranch::afc(void) const {
return _afc;
}
inline void
VarBranch::afc(AFC a) {
_afc=a;
}
inline Activity
VarBranch::activity(void) const {
return _act;
}
inline void
VarBranch::activity(Activity a) {
_act=a;
}
forceinline VoidFunction
VarBranch::merit(void) const {
return _mf;
}
}
// STATISTICS: kernel-branch
|