subset.icc

00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Guido Tack <tack@gecode.org>
00005  *     Christian Schulte <schulte@gecode.org>
00006  *
00007  *  Contributing authors:
00008  *     Gabor Szokoli <szokoli@gecode.org>
00009  *
00010  *  Copyright:
00011  *     Guido Tack, 2004
00012  *     Christian Schulte, 2004
00013  *     Gabor Szokoli, 2004
00014  *
00015  *  Last modified:
00016  *     $Date: 2008-01-31 18:29:16 +0100 (Thu, 31 Jan 2008) $ by $Author: tack $
00017  *     $Revision: 6017 $
00018  *
00019  *  This file is part of Gecode, the generic constraint
00020  *  development environment:
00021  *     http://www.gecode.org
00022  *
00023  *  Permission is hereby granted, free of charge, to any person obtaining
00024  *  a copy of this software and associated documentation files (the
00025  *  "Software"), to deal in the Software without restriction, including
00026  *  without limitation the rights to use, copy, modify, merge, publish,
00027  *  distribute, sublicense, and/or sell copies of the Software, and to
00028  *  permit persons to whom the Software is furnished to do so, subject to
00029  *  the following conditions:
00030  *
00031  *  The above copyright notice and this permission notice shall be
00032  *  included in all copies or substantial portions of the Software.
00033  *
00034  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00035  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00036  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00037  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00038  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00039  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00040  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00041  *
00042  */
00043 
00044 namespace Gecode { namespace Set { namespace Rel {
00045 
00046   template <class View0, class View1>
00047   forceinline
00048   SubSet<View0,View1>::SubSet(Space* home, View0 y0, View1 y1)
00049     : MixBinaryPropagator<View0,PC_SET_CGLB,
00050                             View1,PC_SET_CLUB>(home,y0,y1) {}
00051 
00052   template <class View0, class View1>
00053   forceinline
00054   SubSet<View0,View1>::SubSet(Space* home, bool share, SubSet& p)
00055     : MixBinaryPropagator<View0,PC_SET_CGLB,
00056                             View1,PC_SET_CLUB>(home,share,p) {}
00057 
00058   template <class View0, class View1>
00059   ExecStatus SubSet<View0,View1>::post(Space* home, View0 x, View1 y) {
00060     (void) new (home) SubSet(home,x,y);
00061     return ES_OK;
00062   }
00063 
00064   template <class View0, class View1>
00065   Actor*
00066   SubSet<View0,View1>::copy(Space* home, bool share) {
00067     return new (home) SubSet(home,share,*this);
00068   }
00069 
00070   template <class View0, class View1>
00071   Support::Symbol
00072   SubSet<View0,View1>::ati(void) {
00073     return Reflection::mangle<View0,View1>("Gecode::Set::Rel::SubSet");
00074   }
00075 
00076   template <class View0, class View1>
00077   Reflection::ActorSpec
00078   SubSet<View0,View1>::spec(const Space* home, Reflection::VarMap& m) const {
00079     return MixBinaryPropagator<View0,PC_SET_CGLB,View1,PC_SET_CLUB>
00080       ::spec(home, m, ati());
00081   }
00082 
00083   template <class View0, class View1>
00084   void
00085   SubSet<View0,View1>::post(Space* home, Reflection::VarMap& vars,
00086                             const Reflection::ActorSpec& spec) {
00087     spec.checkArity(2);
00088     View0 x0(home, vars, spec[0]);
00089     View1 x1(home, vars, spec[1]);
00090     (void) new (home) SubSet(home,x0,x1);
00091   }
00092 
00093   template <class View0, class View1>
00094   ExecStatus
00095   SubSet<View0,View1>::propagate(Space* home, ModEventDelta) {
00096     bool oneassigned = x0.assigned() || x1.assigned();
00097     unsigned int x0glbsize;
00098     do {
00099       GlbRanges<View0> x0lb(x0);
00100       GECODE_ME_CHECK ( x1.includeI(home,x0lb) );
00101       GECODE_ME_CHECK ( x1.cardMin(home,x0.cardMin()) );
00102       LubRanges<View1> x1ub(x1);
00103       x0glbsize = x0.glbSize();
00104       GECODE_ME_CHECK ( x0.intersectI(home,x1ub) );
00105       GECODE_ME_CHECK ( x0.cardMax(home,x1.cardMax()) );
00106     } while (x0.glbSize() > x0glbsize);
00107 
00108     if (x0.cardMin() == x1.cardMax())
00109       GECODE_REWRITE(this,(Eq<View0,View1>::post(home,x0,x1)));
00110 
00111     if (shared(x0,x1)) {
00112       return oneassigned ? ES_SUBSUMED(this,home) : ES_NOFIX;
00113     }
00114     return (x0.assigned() || x1.assigned()) ? ES_SUBSUMED(this,home) : ES_FIX;
00115   }
00116 
00117 }}}
00118 
00119 // STATISTICS: set-prop