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1.8.3.1
gecode
int
unshare.cpp
Go to the documentation of this file.
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2007
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*
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* Last modified:
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* $Date: 2010-06-05 00:13:00 +1000 (Sat, 05 Jun 2010) $ by $Author: schulte $
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* $Revision: 11028 $
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <
gecode/int/rel.hh
>
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#include <
gecode/int/bool.hh
>
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namespace
Gecode {
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namespace
Int {
namespace
Unshare {
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template
<
class
Var>
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class
VarPtrLess
{
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public
:
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forceinline
bool
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operator ()
(
const
Var
*
a
,
const
Var
*
b
) {
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return
a->before(*b);
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}
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};
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forceinline
ExecStatus
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link
(
Home
home,
IntVar
** x,
int
n,
IntConLevel
icl) {
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if
(n > 2) {
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ViewArray<IntView>
y(home,n);
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y[0]=*x[0];
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for
(
int
i
=1;
i
<n;
i
++)
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y[
i
]=*x[
i
]=
IntVar
(home,x[0]->
min
(),x[0]->
max
());
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if
((icl ==
ICL_DOM
) || (icl ==
ICL_DEF
)) {
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GECODE_ES_CHECK
(
Rel::NaryEqDom<IntView>::post
(home,y));
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}
else
{
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GECODE_ES_CHECK
(
Rel::NaryEqBnd<IntView>::post
(home,y));
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}
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}
else
if
(n == 2) {
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*x[1]=
IntVar
(home,x[0]->
min
(),x[0]->
max
());
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if
((icl ==
ICL_DOM
) || (icl ==
ICL_DEF
)) {
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GECODE_ES_CHECK
((
Rel::EqDom<IntView,IntView>::post
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(home,*x[0],*x[1])));
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}
else
{
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GECODE_ES_CHECK
((
Rel::EqBnd<IntView,IntView>::post
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(home,*x[0],*x[1])));
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}
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}
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return
ES_OK
;
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}
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forceinline
ExecStatus
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link
(
Home
home,
BoolVar
** x,
int
n,
IntConLevel
) {
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if
(n > 2) {
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ViewArray<BoolView>
y(home,n);
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y[0]=*x[0];
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for
(
int
i
=1;
i
<n;
i
++)
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y[
i
]=*x[
i
]=
BoolVar
(home,0,1);
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GECODE_ES_CHECK
(
Bool::NaryEq<BoolView>::post
(home,y));
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}
else
if
(n == 2) {
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*x[1] =
BoolVar
(home,0,1);
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GECODE_ES_CHECK
((
Bool::Eq<BoolView,BoolView>::post
(home,*x[0],*x[1])));
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}
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return
ES_OK
;
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}
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template
<
class
Var>
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forceinline
ExecStatus
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unshare
(
Home
home,
VarArgArray<Var>
& x,
IntConLevel
icl) {
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int
n=x.
size
();
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if
(n < 2)
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return
ES_OK
;
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Region
r
(home);
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Var
** y = r.
alloc
<
Var
*>(n);
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for
(
int
i
=n;
i
--; )
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y[
i
]=&x[
i
];
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VarPtrLess<Var>
vpl;
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Support::quicksort<Var*,VarPtrLess<Var> >(y,n,vpl);
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// Replace all shared variables with new and equal variables
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for
(
int
i
=0;
i
<n;) {
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int
j=
i
++;
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while
((
i
<n) && y[j]->same(*y[
i
]))
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i++;
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if
(!y[j]->
assigned
())
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link
(home,&y[j],i-j,icl);
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}
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return
ES_OK
;
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}
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}}
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void
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unshare
(
Home
home,
IntVarArgs
& x,
IntConLevel
icl) {
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if
(home.
failed
())
return
;
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GECODE_ES_FAIL
(Int::Unshare::unshare<IntVar>(home,x,icl));
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}
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void
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unshare
(
Home
home,
BoolVarArgs
& x,
IntConLevel
) {
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if
(home.
failed
())
return
;
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GECODE_ES_FAIL
(Int::Unshare::unshare<BoolVar>(home,x,
ICL_DEF
));
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}
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}
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// STATISTICS: int-post