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card.hpp

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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  *     Gabor Szokoli <szokoli@gecode.org>
00007  *
00008  *  Copyright:
00009  *     Guido Tack, 2004
00010  *     Christian Schulte, 2004
00011  *     Gabor Szokoli, 2004
00012  *
00013  *  Last modified:
00014  *     $Date: 2010-03-30 15:34:12 +0200 (Tue, 30 Mar 2010) $ by $Author: tack $
00015  *     $Revision: 10603 $
00016  *
00017  *  This file is part of Gecode, the generic constraint
00018  *  development environment:
00019  *     http://www.gecode.org
00020  *
00021  *  Permission is hereby granted, free of charge, to any person obtaining
00022  *  a copy of this software and associated documentation files (the
00023  *  "Software"), to deal in the Software without restriction, including
00024  *  without limitation the rights to use, copy, modify, merge, publish,
00025  *  distribute, sublicense, and/or sell copies of the Software, and to
00026  *  permit persons to whom the Software is furnished to do so, subject to
00027  *  the following conditions:
00028  *
00029  *  The above copyright notice and this permission notice shall be
00030  *  included in all copies or substantial portions of the Software.
00031  *
00032  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00033  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00034  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00035  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00036  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00037  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00038  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00039  *
00040  */
00041 
00042 #include <gecode/set.hh>
00043 #include <gecode/int.hh>
00044 
00045 namespace Gecode { namespace Set { namespace Int {
00046 
00047   template<class View>
00048   forceinline
00049   Card<View>::Card(Home home, View y0, Gecode::Int::IntView y1)
00050     : MixBinaryPropagator<View,PC_SET_CARD,
00051       Gecode::Int::IntView,Gecode::Int::PC_INT_BND> (home, y0, y1) {}
00052 
00053   template<class View>
00054   forceinline ExecStatus
00055   Card<View>::post(Home home, View x0, Gecode::Int::IntView x1) {
00056     GECODE_ME_CHECK(x1.gq(home,0));
00057     GECODE_ME_CHECK(x0.cardMax(home, Gecode::Int::Limits::max));
00058     (void) new (home) Card(home,x0,x1);
00059     return ES_OK;
00060   }
00061 
00062   template<class View>
00063   forceinline
00064   Card<View>::Card(Space& home, bool share, Card& p)
00065     : MixBinaryPropagator<View,PC_SET_CARD,
00066       Gecode::Int::IntView,Gecode::Int::PC_INT_BND> (home, share, p) {}
00067 
00068   template<class View>
00069   Actor*
00070   Card<View>::copy(Space& home, bool share) {
00071    return new (home) Card(home,share,*this);
00072   }
00073 
00074   template<class View>
00075   ExecStatus
00076   Card<View>::propagate(Space& home, const ModEventDelta&) {
00077    int x1min, x1max;
00078    do {
00079      x1min = x1.min();
00080      x1max = x1.max();
00081      GECODE_ME_CHECK(x0.cardMin(home,static_cast<unsigned int>(x1min)));
00082      GECODE_ME_CHECK(x0.cardMax(home,static_cast<unsigned int>(x1max)));
00083      GECODE_ME_CHECK(x1.gq(home,static_cast<int>(x0.cardMin())));
00084      GECODE_ME_CHECK(x1.lq(home,static_cast<int>(x0.cardMax())));
00085    } while (x1.min() > x1min || x1.max() < x1max);
00086    if (x1.assigned())
00087      return home.ES_SUBSUMED(*this);
00088    return ES_FIX;
00089   }
00090 
00091 }}}
00092 
00093 // STATISTICS: set-prop