gecode » int » dom
spec.hpp

00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Christian Schulte, 2004
00008  *
00009  *  Last modified:
00010  *     $Date: 2009-11-24 20:31:15 +0100 (Tue, 24 Nov 2009) $ by $Author: schulte $
00011  *     $Revision: 10113 $
00012  *
00013  *  This file is part of Gecode, the generic constraint
00014  *  development environment:
00015  *     http://www.gecode.org
00016  *
00017  *  Permission is hereby granted, free of charge, to any person obtaining
00018  *  a copy of this software and associated documentation files (the
00019  *  "Software"), to deal in the Software without restriction, including
00020  *  without limitation the rights to use, copy, modify, merge, publish,
00021  *  distribute, sublicense, and/or sell copies of the Software, and to
00022  *  permit persons to whom the Software is furnished to do so, subject to
00023  *  the following conditions:
00024  *
00025  *  The above copyright notice and this permission notice shall be
00026  *  included in all copies or substantial portions of the Software.
00027  *
00028  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00029  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00030  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00031  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00032  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00033  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00034  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00035  *
00036  */
00037 
00038 namespace Gecode { namespace Int { namespace Dom {
00039 
00040   template<class View>
00041   forceinline
00042   ReIntSet<View>::ReIntSet
00043   (Home home, View x, const IntSet& s, BoolView b)
00044     : ReUnaryPropagator<View,PC_INT_DOM,BoolView>(home,x,b), is(s) {
00045     home.notice(*this,AP_DISPOSE);
00046   }
00047 
00048   template<class View>
00049   forceinline size_t
00050   ReIntSet<View>::dispose(Space& home) {
00051     home.ignore(*this,AP_DISPOSE);
00052     is.~IntSet();
00053     (void) ReUnaryPropagator<View,PC_INT_DOM,BoolView>::dispose(home);
00054     return sizeof(*this);
00055   }
00056 
00057   template<class View>
00058   ExecStatus
00059   ReIntSet<View>::post(Home home, View x, const IntSet& s, BoolView b) {
00060     if (s.ranges() == 0) {
00061       GECODE_ME_CHECK(b.zero(home));
00062     } else if (s.ranges() == 1) {
00063       return ReRange<View>::post(home,x,s.min(),s.max(),b);
00064     } else {
00065       (void) new (home) ReIntSet<View>(home,x,s,b);
00066     }
00067     return ES_OK;
00068   }
00069 
00070 
00071   template<class View>
00072   forceinline
00073   ReIntSet<View>::ReIntSet(Space& home, bool share, ReIntSet& p)
00074     : ReUnaryPropagator<View,PC_INT_DOM,BoolView>(home,share,p) {
00075     is.update(home,share,p.is);
00076   }
00077 
00078   template<class View>
00079   Actor*
00080   ReIntSet<View>::copy(Space& home, bool share) {
00081     return new (home) ReIntSet(home,share,*this);
00082   }
00083 
00084   template<class View>
00085   ExecStatus
00086   ReIntSet<View>::propagate(Space& home, const ModEventDelta&) {
00087     IntSetRanges i_is(is);
00088     if (b.one()) {
00089       GECODE_ME_CHECK(x0.inter_r(home,i_is,false)); goto subsumed;
00090     }
00091     if (b.zero()) {
00092       GECODE_ME_CHECK(x0.minus_r(home,i_is,false)); goto subsumed;
00093     }
00094 
00095     {
00096       ViewRanges<View> i_x(x0);
00097 
00098       switch (Iter::Ranges::compare(i_x,i_is)) {
00099       case Iter::Ranges::CS_SUBSET:
00100         GECODE_ME_CHECK(b.one_none(home)); goto subsumed;
00101       case Iter::Ranges::CS_DISJOINT:
00102         GECODE_ME_CHECK(b.zero_none(home)); goto subsumed;
00103       case Iter::Ranges::CS_NONE:
00104         break;
00105       default: GECODE_NEVER;
00106       }
00107     }
00108 
00109     return ES_FIX;
00110   subsumed:
00111     return ES_SUBSUMED(*this,home);
00112   }
00113 
00114 }}}
00115 
00116 // STATISTICS: int-prop
00117