ter-dom.icc

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: 2008-07-11 09:28:48 +0200 (Fri, 11 Jul 2008) $ by $Author: tack $
00011  *     $Revision: 7285 $
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(Space* 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(Space* 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   void
00060   TerDom<View>::post(Space* home, Reflection::VarMap& vars,
00061                      const Reflection::ActorSpec& spec) {
00062     spec.checkArity(3);
00063     View x0(home, vars, spec[0]);
00064     View x1(home, vars, spec[1]);
00065     View x2(home, vars, spec[1]);
00066     (void) new (home) TerDom<View>(home, x0, x1, x2);
00067   }
00068 
00069   template <class View>
00070   forceinline
00071   TerDom<View>::TerDom(Space* home, bool share, TerDom<View>& p)
00072     : TernaryPropagator<View,PC_INT_DOM>(home,share,p) {}
00073 
00074   template <class View>
00075   Actor*
00076   TerDom<View>::copy(Space* home, bool share) {
00077     return new (home) TerDom<View>(home,share,*this);
00078   }
00079 
00080   template <class View>
00081   Support::Symbol
00082   TerDom<View>::ati(void) {
00083     return Reflection::mangle<View>("Gecode::Int::Distinct::TerDom");
00084   }
00085 
00086   template <class View>
00087   Reflection::ActorSpec
00088   TerDom<View>::spec(const Space* home, Reflection::VarMap& m) const {
00089     return TernaryPropagator<View,PC_INT_DOM>::spec(home, m, ati());
00090   }
00091 
00093 #define GECODE_INT_HALL_ONE(x0,x1,x2)           \
00094   if (x0.assigned()) {                          \
00095     GECODE_ME_CHECK(x1.nq(home,x0.val()));      \
00096     GECODE_ME_CHECK(x2.nq(home,x0.val()));      \
00097     if (x1.assigned()) {                        \
00098       GECODE_ME_CHECK(x2.nq(home,x1.val()));    \
00099       return ES_SUBSUMED(this,home);            \
00100     }                                           \
00101     if (x2.assigned()) {                        \
00102       GECODE_ME_CHECK(x1.nq(home,x2.val()));    \
00103       return ES_SUBSUMED(this,home);            \
00104     }                                           \
00105     return ES_FIX;                              \
00106   }
00107 
00108 
00110 #define GECODE_INT_HALL_TWO(x0,x1,x2)                           \
00111   if ((x0.size() == 2) && (x1.size() == 2) &&                   \
00112       (x0.min() == x1.min()) && (x0.max() == x1.max())) {       \
00113     GECODE_ME_CHECK(x2.nq(home,x0.min()));                      \
00114     GECODE_ME_CHECK(x2.nq(home,x0.max()));                      \
00115     return ES_FIX;                                              \
00116   }
00117 
00118   template <class View>
00119   ExecStatus
00120   TerDom<View>::propagate(Space* home, ModEventDelta) {
00121     GECODE_INT_HALL_ONE(x0,x1,x2);
00122     GECODE_INT_HALL_ONE(x1,x0,x2);
00123     GECODE_INT_HALL_ONE(x2,x0,x1);
00124     GECODE_INT_HALL_TWO(x0,x1,x2);
00125     GECODE_INT_HALL_TWO(x0,x2,x1);
00126     GECODE_INT_HALL_TWO(x1,x2,x0);
00127     return ES_FIX;
00128   }
00129 
00130 #undef GECODE_INT_HALL_ONE
00131 #undef GECODE_INT_HALL_TWO
00132 
00133 }}}
00134 
00135 // STATISTICS: int-prop
00136