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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  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  *  Permission is hereby granted, free of charge, to any person obtaining
00014  *  a copy of this software and associated documentation files (the
00015  *  "Software"), to deal in the Software without restriction, including
00016  *  without limitation the rights to use, copy, modify, merge, publish,
00017  *  distribute, sublicense, and/or sell copies of the Software, and to
00018  *  permit persons to whom the Software is furnished to do so, subject to
00019  *  the following conditions:
00020  *
00021  *  The above copyright notice and this permission notice shall be
00022  *  included in all copies or substantial portions of the Software.
00023  *
00024  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 namespace Gecode {
00035 
00036   /*
00037    * Operations for linear expressions
00038    *
00039    */
00040   forceinline
00041   LinIntRel::LinIntRel(void) {}
00042 
00043   forceinline
00044   LinIntRel::LinIntRel(const LinIntExpr& l, IntRelType irt0, const LinIntExpr& r)
00045     : e(l-r), irt(irt0) {}
00046 
00047   forceinline
00048   LinIntRel::LinIntRel(const LinIntExpr& l, IntRelType irt0, int r)
00049     : e(l-r), irt(irt0) {}
00050 
00051   forceinline
00052   LinIntRel::LinIntRel(int l, IntRelType irt0, const LinIntExpr& r)
00053     : e(l-r), irt(irt0) {}
00054 
00055   forceinline IntRelType
00056   LinIntRel::neg(IntRelType irt) {
00057     switch (irt) {
00058     case IRT_EQ: return IRT_NQ;
00059     case IRT_NQ: return IRT_EQ;
00060     case IRT_LQ: return IRT_GR;
00061     case IRT_LE: return IRT_GQ;
00062     case IRT_GQ: return IRT_LE;
00063     case IRT_GR: return IRT_LQ;
00064     default: GECODE_NEVER;
00065     }
00066     return IRT_LQ;
00067   }
00068 
00069   forceinline void
00070   LinIntRel::post(Home home, bool t, IntPropLevel ipl) const {
00071     e.post(home,t ? irt : neg(irt),ipl);
00072   }
00073 
00074   forceinline void
00075   LinIntRel::post(Home home, const BoolVar& b, bool t, IntPropLevel ipl) const {
00076     e.post(home,t ? irt : neg(irt),b,ipl);
00077   }
00078 
00079 }
00080 
00081 // STATISTICS: minimodel-any