subset.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 * 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: 2010-03-03 17:32:21 +0100 (Wed, 03 Mar 2010) $ by $Author: schulte $ 00017 * $Revision: 10364 $ 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(Home 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(Home 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 ExecStatus 00072 Subset<View0,View1>::propagate(Space& home, const ModEventDelta&) { 00073 bool oneassigned = x0.assigned() || x1.assigned(); 00074 unsigned int x0glbsize; 00075 do { 00076 GlbRanges<View0> x0lb(x0); 00077 GECODE_ME_CHECK ( x1.includeI(home,x0lb) ); 00078 GECODE_ME_CHECK ( x1.cardMin(home,x0.cardMin()) ); 00079 LubRanges<View1> x1ub(x1); 00080 x0glbsize = x0.glbSize(); 00081 GECODE_ME_CHECK ( x0.intersectI(home,x1ub) ); 00082 GECODE_ME_CHECK ( x0.cardMax(home,x1.cardMax()) ); 00083 } while (x0.glbSize() > x0glbsize); 00084 00085 if (x0.cardMin() == x1.cardMax()) 00086 GECODE_REWRITE(*this,(Eq<View0,View1>::post(home(*this),x0,x1))); 00087 00088 if (shared(x0,x1)) { 00089 return oneassigned ? home.ES_SUBSUMED(*this) : ES_NOFIX; 00090 } 00091 return (x0.assigned() || x1.assigned()) ? home.ES_SUBSUMED(*this) : ES_FIX; 00092 } 00093 00094 }}} 00095 00096 // STATISTICS: set-prop