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int-rel.hpp

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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, 2005
00008  *
00009  *  Last modified:
00010  *     $Date: 2013-01-22 13:48:12 +0100 (Tue, 22 Jan 2013) $ by $Author: schulte $
00011  *     $Revision: 13227 $
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 {
00039 
00040   /*
00041    * Operations for linear expressions
00042    *
00043    */
00044   forceinline
00045   LinIntRel::LinIntRel(void) {}
00046 
00047   forceinline
00048   LinIntRel::LinIntRel(const LinIntExpr& l, IntRelType irt0, const LinIntExpr& r)
00049     : e(l-r), irt(irt0) {}
00050 
00051   forceinline
00052   LinIntRel::LinIntRel(const LinIntExpr& l, IntRelType irt0, int r)
00053     : e(l-r), irt(irt0) {}
00054 
00055   forceinline
00056   LinIntRel::LinIntRel(int l, IntRelType irt0, const LinIntExpr& r)
00057     : e(l-r), irt(irt0) {}
00058 
00059   forceinline IntRelType
00060   LinIntRel::neg(IntRelType irt) {
00061     switch (irt) {
00062     case IRT_EQ: return IRT_NQ;
00063     case IRT_NQ: return IRT_EQ;
00064     case IRT_LQ: return IRT_GR;
00065     case IRT_LE: return IRT_GQ;
00066     case IRT_GQ: return IRT_LE;
00067     case IRT_GR: return IRT_LQ;
00068     default: GECODE_NEVER;
00069     }
00070     return IRT_LQ;
00071   }
00072 
00073   forceinline void
00074   LinIntRel::post(Home home, bool t, IntConLevel icl) const {
00075     e.post(home,t ? irt : neg(irt),icl);
00076   }
00077 
00078   forceinline void
00079   LinIntRel::post(Home home, const BoolVar& b, bool t, IntConLevel icl) const {
00080     e.post(home,t ? irt : neg(irt),b,icl);
00081   }
00082 
00083 }
00084 
00085 // STATISTICS: minimodel-any