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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Guido Tack <tack@gecode.org>
*
* Contributing authors:
* Gabor Szokoli <szokoli@gecode.org>
*
* Copyright:
* Guido Tack, 2004, 2005
*
* 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.
*
*/
#include <gecode/set.hh>
#include <gecode/set/rel.hh>
#include <gecode/set/rel-op.hh>
namespace Gecode {
using namespace Gecode::Set;
using namespace Gecode::Set::Rel;
using namespace Gecode::Set::RelOp;
void
rel(Home home, SetVar x, SetOpType op, const IntSet& y, SetRelType r,
SetVar z) {
Set::Limits::check(y, "Set::rel");
ConstSetView yv(home, y);
if (op==SOT_MINUS) {
switch (r) {
case SRT_EQ:
{
GlbRanges<ConstSetView> yr(yv);
RangesCompl<GlbRanges<ConstSetView> > yrc(yr);
IntSet yc(yrc);
ConstSetView cy(home, yc);
GECODE_ES_FAIL(
(Intersection<ConstSetView,
SetView,SetView>
::post(home,cy,x,z)));
}
break;
case SRT_LQ: case SRT_LE: case SRT_GQ: case SRT_GR:
{
GlbRanges<ConstSetView> yr(yv);
RangesCompl<GlbRanges<ConstSetView> > yrc(yr);
IntSet yc(yrc);
ConstSetView cy(home, yc);
SetVar tmp(home,IntSet::empty,Set::Limits::min,Set::Limits::max);
GECODE_ES_FAIL(
(Intersection<ConstSetView,
SetView,SetView>
::post(home,cy,x,tmp)));
rel(home,tmp,r,z);
}
break;
case SRT_NQ:
{
SetVar tmp(home);
GECODE_ES_FAIL(
(Distinct<SetView,SetView>
::post(home,z,tmp)));
GlbRanges<ConstSetView> yr(yv);
RangesCompl<GlbRanges<ConstSetView> > yrc(yr);
IntSet yc(yrc);
ConstSetView cy(home, yc);
GECODE_ES_FAIL(
(Intersection<ConstSetView,
SetView,SetView>
::post(home,cy,x,tmp)));
}
break;
case SRT_SUB:
{
GlbRanges<ConstSetView> yr(yv);
RangesCompl<GlbRanges<ConstSetView> > yrc(yr);
IntSet yc(yrc);
ConstSetView cy(home, yc);
GECODE_ES_FAIL(
(SuperOfInter<ConstSetView,SetView,SetView>
::post(home,cy,x,z)));
}
break;
case SRT_SUP:
{
SetVar tmp(home);
GECODE_ES_FAIL(
(Subset<SetView,SetView>::post(home,z,tmp)));
GlbRanges<ConstSetView> yr(yv);
RangesCompl<GlbRanges<ConstSetView> > yrc(yr);
IntSet yc(yrc);
ConstSetView cy(home, yc);
SetView xv(x);
GECODE_ES_FAIL(
(Intersection<ConstSetView,
SetView,SetView>
::post(home,cy,xv,tmp)));
}
break;
case SRT_DISJ:
{
SetVar tmp(home);
EmptyView emptyset;
GECODE_ES_FAIL((SuperOfInter<SetView,SetView,EmptyView>
::post(home, z, tmp, emptyset)));
GlbRanges<ConstSetView> yr(yv);
RangesCompl<GlbRanges<ConstSetView> > yrc(yr);
IntSet yc(yrc);
ConstSetView cy(home, yc);
GECODE_ES_FAIL(
(Intersection<ConstSetView,
SetView,SetView>
::post(home,cy,x,tmp)));
}
break;
case SRT_CMPL:
{
SetView xv(x);
ComplementView<SetView> cx(xv);
GECODE_ES_FAIL(
(Union<ConstSetView,
ComplementView<SetView>,
SetView>::post(home, yv, cx, z)));
}
break;
default:
throw UnknownRelation("Set::rel");
}
} else {
rel(home, y, op, x, r, z);
}
}
}
// STATISTICS: set-post
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