link-multi.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, 2007
*
* 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,
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* 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
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*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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namespace Gecode { namespace Int { namespace Channel {
forceinline
LinkMulti::LinkMulti(Home home, ViewArray<BoolView>& x, IntView y, int o0)
: MixNaryOnePropagator<BoolView,PC_BOOL_NONE,IntView,PC_INT_DOM>
(home,x,y), c(home), status(S_NONE), o(o0) {
x.subscribe(home,*new (home) Advisor(home,*this,c));
// Propagator is scheduled because of the dependency subscription
}
forceinline
LinkMulti::LinkMulti(Space& home, LinkMulti& p)
: MixNaryOnePropagator<BoolView,PC_BOOL_NONE,IntView,PC_INT_DOM>
(home,p), status(S_NONE), o(p.o) {
assert(p.status == S_NONE);
c.update(home,p.c);
}
forceinline ExecStatus
LinkMulti::post(Home home, ViewArray<BoolView>& x, IntView y, int o) {
int n=x.size();
GECODE_ME_CHECK(y.gq(home,o));
GECODE_ME_CHECK(y.lq(home,o+n-1));
assert(n > 0);
if (n == 1) {
GECODE_ME_CHECK(x[0].one(home));
assert(y.val() == o);
} else if (y.assigned()) {
int j=y.val()-o;
GECODE_ME_CHECK(x[j].one(home));
for (int i=0; i<j; i++)
GECODE_ME_CHECK(x[i].zero(home));
for (int i=j+1; i<n; i++)
GECODE_ME_CHECK(x[i].zero(home));
} else {
for (int i=0; i<n; i++)
if (x[i].one()) {
for (int j=0; j<i; j++)
GECODE_ME_CHECK(x[j].zero(home));
for (int j=i+1; j<n; j++)
GECODE_ME_CHECK(x[j].zero(home));
GECODE_ME_CHECK(y.eq(home,o+i));
return ES_OK;
} else if (x[i].zero()) {
GECODE_ME_CHECK(y.nq(home,o+i));
}
(void) new (home) LinkMulti(home,x,y,o);
}
return ES_OK;
}
}}}
// STATISTICS: int-prop
Gecode::Home
Home class for posting propagators
Definition core.hpp:856
Gecode::Int::Channel::LinkMulti::post
static ExecStatus post(Home home, ViewArray< BoolView > &x, IntView y, int o)
Post propagator for .
Definition link-multi.hpp:53
Gecode::Int::IntView
Integer view for integer variables.
Definition view.hpp:129
Gecode::MixNaryOnePropagator< BoolView, PC_BOOL_NONE, IntView, PC_INT_DOM >::x
ViewArray< BoolView > x
Definition pattern.hpp:275
Gecode::MixNaryOnePropagator< BoolView, PC_BOOL_NONE, IntView, PC_INT_DOM >::y
IntView y
Definition pattern.hpp:277
Gecode::ViewArray
View arrays.
Definition array.hpp:253
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
Gecode::Int::Channel
Channel propagators
Gecode::Int
Finite domain integers.
Gecode::Int::PC_BOOL_NONE
const Gecode::PropCond PC_BOOL_NONE
Propagation condition to be ignored (convenience).
Definition var-type.hpp:118
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
Test::Float::Arithmetic::c
Gecode::FloatVal c(-8, 8)
forceinline
#define forceinline
Definition config.hpp:187