ter-dom.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, 2003
00008  *
00009  *  Last modified:
00010  *     $Date: 2010-03-03 17:32:21 +0100 (Wed, 03 Mar 2010) $ by $Author: schulte $
00011  *     $Revision: 10364 $
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 Distinct {
00039 
00040 
00041   /*
00042    * Ternary domain consistent distinct
00043    *
00044    */
00045 
00046   template<class View>
00047   forceinline
00048   TerDom<View>::TerDom(Home home, View x0, View x1, View x2)
00049     : TernaryPropagator<View,PC_INT_DOM>(home,x0,x1,x2) {}
00050 
00051   template<class View>
00052   ExecStatus
00053   TerDom<View>::post(Home home, View x0, View x1, View x2) {
00054     (void) new (home) TerDom<View>(home,x0,x1,x2);
00055     return ES_OK;
00056   }
00057 
00058   template<class View>
00059   forceinline
00060   TerDom<View>::TerDom(Space& home, bool share, TerDom<View>& p)
00061     : TernaryPropagator<View,PC_INT_DOM>(home,share,p) {}
00062 
00063   template<class View>
00064   Actor*
00065   TerDom<View>::copy(Space& home, bool share) {
00066     return new (home) TerDom<View>(home,share,*this);
00067   }
00068 
00070 #define GECODE_INT_HALL_ONE(x0,x1,x2)           \
00071   if (x0.assigned()) {                          \
00072     GECODE_ME_CHECK(x1.nq(home,x0.val()));      \
00073     GECODE_ME_CHECK(x2.nq(home,x0.val()));      \
00074     if (x1.assigned()) {                        \
00075       GECODE_ME_CHECK(x2.nq(home,x1.val()));    \
00076       return home.ES_SUBSUMED(*this);            \
00077     }                                           \
00078     if (x2.assigned()) {                        \
00079       GECODE_ME_CHECK(x1.nq(home,x2.val()));    \
00080       return home.ES_SUBSUMED(*this);            \
00081     }                                           \
00082     return ES_FIX;                              \
00083   }
00084 
00085 
00087 #define GECODE_INT_HALL_TWO(x0,x1,x2)                           \
00088   if ((x0.size() == 2) && (x1.size() == 2) &&                   \
00089       (x0.min() == x1.min()) && (x0.max() == x1.max())) {       \
00090     GECODE_ME_CHECK(x2.nq(home,x0.min()));                      \
00091     GECODE_ME_CHECK(x2.nq(home,x0.max()));                      \
00092     return ES_FIX;                                              \
00093   }
00094 
00095   template<class View>
00096   ExecStatus
00097   TerDom<View>::propagate(Space& home, const ModEventDelta&) {
00098     GECODE_INT_HALL_ONE(x0,x1,x2);
00099     GECODE_INT_HALL_ONE(x1,x0,x2);
00100     GECODE_INT_HALL_ONE(x2,x0,x1);
00101     GECODE_INT_HALL_TWO(x0,x1,x2);
00102     GECODE_INT_HALL_TWO(x0,x2,x1);
00103     GECODE_INT_HALL_TWO(x1,x2,x0);
00104     return ES_FIX;
00105   }
00106 
00107 #undef GECODE_INT_HALL_ONE
00108 #undef GECODE_INT_HALL_TWO
00109 
00110 }}}
00111 
00112 // STATISTICS: int-prop
00113