pair.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2009
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
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* permit persons to whom the Software is furnished to do so, subject to
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*
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#include <gecode/int/rel.hh>
namespace Gecode { namespace Int { namespace Element {
forceinline
Pair::Pair(Home home, IntView x0, IntView x1, IntView x2, int w0)
: TernaryPropagator<IntView,PC_INT_DOM>(home,x0,x1,x2), w(w0) {}
inline ExecStatus
Pair::post(Home home, IntView x0, IntView x1, IntView x2,
int w, int h) {
GECODE_ME_CHECK(x0.gq(home,0)); GECODE_ME_CHECK(x0.le(home,w));
GECODE_ME_CHECK(x1.gq(home,0)); GECODE_ME_CHECK(x1.le(home,h));
GECODE_ME_CHECK(x2.gq(home,0)); GECODE_ME_CHECK(x2.le(home,w*h));
if (x0.assigned() && x1.assigned()) {
GECODE_ME_CHECK(x2.eq(home,x0.val()+w*x1.val()));
} else if (x1.assigned()) {
OffsetView x0x1w(x0,x1.val()*w);
return Rel::EqDom<OffsetView,IntView>::post(home,x0x1w,x2);
} else if (x2.assigned()) {
GECODE_ME_CHECK(x0.eq(home,x2.val() % w));
GECODE_ME_CHECK(x1.eq(home,static_cast<int>(x2.val() / w)));
} else {
assert(!shared(x0,x2) && !shared(x1,x2));
(void) new (home) Pair(home,x0,x1,x2,w);
}
return ES_OK;
}
forceinline
Pair::Pair(Space& home, Pair& p)
: TernaryPropagator<IntView,PC_INT_DOM>(home,p), w(p.w) {}
}}}
// STATISTICS: int-prop
Gecode::Home
Home class for posting propagators
Definition core.hpp:856
Gecode::Int::Element::Pair::Pair
Pair(Space &home, Pair &p)
Constructor for cloning p.
Definition pair.hpp:64
Gecode::Int::Element::Pair::w
int w
Width.
Definition element.hh:304
Gecode::Int::Element::Pair::post
static ExecStatus post(Home home, IntView x0, IntView x1, IntView x2, int w, int h)
Post propagator .
Definition pair.hpp:43
Gecode::Int::IntView
Integer view for integer variables.
Definition view.hpp:129
Gecode::Int::OffsetView
Offset integer view.
Definition view.hpp:443
Gecode::Int::Rel::EqDom::post
static ExecStatus post(Home home, View0 x0, View1 x1)
Post domain consistent propagator .
Definition eq.hpp:176
Gecode::Propagator::Space
friend class Space
Definition core.hpp:1066
Gecode::TernaryPropagator< IntView, PC_INT_DOM >::x2
IntView x2
Definition pattern.hpp:116
Gecode::TernaryPropagator< IntView, PC_INT_DOM >::x1
IntView x1
Definition pattern.hpp:116
Gecode::TernaryPropagator< IntView, PC_INT_DOM >::x0
IntView x0
Definition pattern.hpp:116
Gecode::TernaryPropagator< IntView, PC_INT_DOM >::TernaryPropagator
TernaryPropagator(Space &home, TernaryPropagator &p)
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
rel.hh
Gecode::Int::Element
Element propagators
Gecode::Int
Finite domain integers.
Gecode::Int::PC_INT_DOM
const Gecode::PropCond PC_INT_DOM
Propagate when domain changes.
Definition var-type.hpp:100
Gecode
Gecode toplevel namespace
Gecode::ExecStatus
ExecStatus
Definition core.hpp:472
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition core.hpp:476
Gecode::shared
bool shared(ViewArray< ViewX > x, ViewArray< ViewY > y)
Definition array.hpp:1466
forceinline
#define forceinline
Definition config.hpp:187