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cardinality.cpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Gabor Szokoli <szokoli@gecode.org>
00005  *     Guido Tack <tack@gecode.org>
00006  *     Christian Schulte <schulte@gecode.org>
00007  *
00008  *  Copyright:
00009  *     Gabor Szokoli, 2004
00010  *     Guido Tack, 2004
00011  *     Christian Schulte, 2004
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 #include <gecode/set.hh>
00039 #include <gecode/set/int.hh>
00040 
00041 namespace Gecode {
00042 
00043   void
00044   cardinality(Home home, SetVar x, unsigned int i, unsigned int j) {
00045     Set::Limits::check(i, "Set::cardinality");
00046     Set::Limits::check(j, "Set::cardinality");
00047     GECODE_POST;
00048     Set::SetView _x(x);
00049     GECODE_ME_FAIL(_x.cardMin(home, i));
00050     GECODE_ME_FAIL(_x.cardMax(home, j));
00051   }
00052 
00053   void
00054   cardinality(Home home, const SetVarArgs& x, unsigned int i, unsigned int j) {
00055     Set::Limits::check(i, "Set::cardinality");
00056     Set::Limits::check(j, "Set::cardinality");
00057     GECODE_POST;
00058     for (int k=x.size(); k--; ) {
00059       Set::SetView _x(x[k]);
00060       GECODE_ME_FAIL(_x.cardMin(home, i));
00061       GECODE_ME_FAIL(_x.cardMax(home, j));
00062     }
00063   }
00064 
00065   void
00066   cardinality(Home home, SetVar s, IntVar x) {
00067     GECODE_POST;
00068     GECODE_ES_FAIL(Set::Int::Card<Set::SetView>::post(home,s, x));
00069   }
00070 
00071   void
00072   cardinality(Home home, SetVar s, IntVar x, Reify r) {
00073     IntVar y(home, 0, static_cast<int>(Set::Limits::card));
00074     rel(home, x, IRT_EQ, y, r);
00075     cardinality(home, s, y);
00076   }
00077 
00078 }
00079 
00080 // STATISTICS: set-post