val-sel.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Contributing authors:
* Gabor Szokoli <szokoli@gecode.org>
* Guido Tack <tack@gecode.org>
*
* Copyright:
* Christian Schulte, 2012
* Gabor Szokoli, 2004
* Guido Tack, 2004
*
* 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 Set { namespace Branch {
forceinline
ValSelMin::ValSelMin(Space& home, const ValBranch<Var>& vb)
: ValSel<SetView,int>(home,vb) {}
forceinline
ValSelMin::ValSelMin(Space& home, ValSelMin& vs)
: ValSel<SetView,int>(home,vs) {}
forceinline int
ValSelMin::val(const Space&, SetView x, int) {
UnknownRanges<SetView> u(x);
return u.min();
}
forceinline
ValSelMax::ValSelMax(Space& home, const ValBranch<Var>& vb)
: ValSel<SetView,int>(home,vb) {}
forceinline
ValSelMax::ValSelMax(Space& home, ValSelMax& vs)
: ValSel<SetView,int>(home,vs) {}
forceinline int
ValSelMax::val(const Space&, SetView x, int) {
int max = 0;
for (UnknownRanges<SetView> u(x); u(); ++u)
max = u.max();
return max;
}
forceinline
ValSelMed::ValSelMed(Space& home, const ValBranch<Var>& vb)
: ValSel<SetView,int>(home,vb) {}
forceinline
ValSelMed::ValSelMed(Space& home, ValSelMed& vs)
: ValSel<SetView,int>(home,vs) {}
forceinline int
ValSelMed::val(const Space&, SetView x, int) {
UnknownRanges<SetView> u1(x);
unsigned int i = Iter::Ranges::size(u1) / 2;
UnknownRanges<SetView> u2(x);
int med = (u2.min()+u2.max()) / 2;
++u2;
if (!u2()) {
return med;
}
UnknownRanges<SetView> u3(x);
while (i >= u3.width()) {
i -= u3.width();
++u3;
}
return u3.min() + static_cast<int>(i);
}
forceinline
ValSelRnd::ValSelRnd(Space& home, const ValBranch<Var>& vb)
: ValSel<SetView,int>(home,vb), r(vb.rnd()) {}
forceinline
ValSelRnd::ValSelRnd(Space& home, ValSelRnd& vs)
: ValSel<SetView,int>(home,vs), r(vs.r) {
}
forceinline int
ValSelRnd::val(const Space&, SetView x, int) {
UnknownRanges<SetView> u(x);
unsigned int p = r(Iter::Ranges::size(u));
for (UnknownRanges<SetView> i(x); i(); ++i) {
if (i.width() > p)
return i.min() + static_cast<int>(p);
p -= i.width();
}
GECODE_NEVER;
return 0;
}
forceinline bool
ValSelRnd::notice(void) const {
return true;
}
forceinline void
ValSelRnd::dispose(Space&) {
r.~Rnd();
}
}}}
// STATISTICS: set-branch
Gecode::Int::Branch::ValSelMax::val
int val(const Space &home, View x, int i)
Return value of view x at position i.
Definition val-sel.hpp:62
Gecode::Int::Branch::ValSelMax::ValSelMax
ValSelMax(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Gecode::Int::Branch::ValSelMed::ValSelMed
ValSelMed(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Gecode::Int::Branch::ValSelMed::val
int val(const Space &home, View x, int i)
Return value of view x at position i.
Definition val-sel.hpp:77
Gecode::Int::Branch::ValSelMin::ValSelMin
ValSelMin(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Gecode::Int::Branch::ValSelMin::val
int val(const Space &home, View x, int i)
Return value of view x at position i.
Definition val-sel.hpp:47
Gecode::Int::Branch::ValSelRnd::val
int val(const Space &home, View x, int i)
Return value of view x at position i.
Definition val-sel.hpp:108
Gecode::Int::Branch::ValSelRnd::notice
bool notice(void) const
Whether dispose must always be called (that is, notice is needed).
Definition val-sel.hpp:120
Gecode::Int::Branch::ValSelRnd::ValSelRnd
ValSelRnd(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Gecode::Int::Branch::ValSelRnd::dispose
void dispose(Space &home)
Delete value selection.
Definition val-sel.hpp:125
Gecode::Iter::Ranges::MinMax::min
int min(void) const
Return smallest value of range.
Definition ranges-minmax.hpp:99
Gecode::Iter::Ranges::MinMax::width
unsigned int width(void) const
Return width of range (distance between minimum and maximum).
Definition ranges-minmax.hpp:107
Gecode::Iter::Ranges::MinMax::max
int max(void) const
Return largest value of range.
Definition ranges-minmax.hpp:103
Gecode::Set::Branch::ValSelMax::ValSelMax
ValSelMax(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Definition val-sel.hpp:55
Gecode::Set::Branch::ValSelMed::ValSelMed
ValSelMed(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Definition val-sel.hpp:69
Gecode::Set::Branch::ValSelMin::ValSelMin
ValSelMin(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Definition val-sel.hpp:43
Gecode::Set::Branch::ValSelRnd::ValSelRnd
ValSelRnd(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Definition val-sel.hpp:93
Gecode::Set::Branch::ValSelRnd::r
Rnd r
The used random number generator.
Definition branch.hh:280
Gecode::Set::SetView
Set view for set variables
Definition view.hpp:56
Gecode::Set::UnknownRanges
Range iterator for the unknown set.
Definition var-imp.hpp:402
Gecode::Space
Computation spaces.
Definition core.hpp:1742
Gecode::ValBranch
Value branching information.
Definition val.hpp:41
Gecode::ValSel< SetView, int >::ValSel
ValSel(Space &home, const ValBranch< Var > &vb)
Definition val-sel.hpp:98
Gecode::Iter::Ranges::size
unsigned int size(I &i)
Size of all ranges of range iterator i.
Definition ranges-operations.hpp:74
Gecode::Set::Branch
Set branchings
Gecode::Set
Finite integer sets.
Definition var-imp.hpp:137
Gecode
Gecode toplevel namespace
Gecode::max
void max(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition arithmetic.cpp:49
forceinline
#define forceinline
Definition config.hpp:187
GECODE_NEVER
#define GECODE_NEVER
Assert that this command is never executed.
Definition macros.hpp:56