channel.hpp

00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *     Vincent Barichard <Vincent.Barichard@univ-angers.fr>
00006  *
00007  *  Copyright:
00008  *     Christian Schulte, 2004
00009  *     Vincent Barichard, 2012
00010  *
00011  *  Last modified:
00012  *     $Date: 2017-04-10 13:21:37 +0200 (Mon, 10 Apr 2017) $ by $Author: schulte $
00013  *     $Revision: 15631 $
00014  *
00015  *  This file is part of Gecode, the generic constraint
00016  *  development environment:
00017  *     http://www.gecode.org
00018  *
00019  *  Permission is hereby granted, free of charge, to any person obtaining
00020  *  a copy of this software and associated documentation files (the
00021  *  "Software"), to deal in the Software without restriction, including
00022  *  without limitation the rights to use, copy, modify, merge, publish,
00023  *  distribute, sublicense, and/or sell copies of the Software, and to
00024  *  permit persons to whom the Software is furnished to do so, subject to
00025  *  the following conditions:
00026  *
00027  *  The above copyright notice and this permission notice shall be
00028  *  included in all copies or substantial portions of the Software.
00029  *
00030  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00031  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00032  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00033  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00034  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00035  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00036  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00037  *
00038  */
00039 
00040 namespace Gecode { namespace Float { namespace Channel {
00041 
00042   template<class A, class B>
00043   forceinline
00044   Channel<A,B>::Channel(Home home, A x0, B x1)
00045     : MixBinaryPropagator<A,PC_FLOAT_BND,B,Int::PC_INT_BND>(home,x0,x1) {}
00046 
00047   template<class A, class B>
00048   forceinline
00049   Channel<A,B>::Channel(Space& home, bool share, Channel<A,B>& p)
00050     : MixBinaryPropagator<A,PC_FLOAT_BND,B,Int::PC_INT_BND>(home,share,p) {}
00051 
00052   template<class A, class B>
00053   Actor*
00054   Channel<A,B>::copy(Space& home, bool share) {
00055     return new (home) Channel<A,B>(home,share,*this);
00056   }
00057 
00058   template<class A, class B>
00059   ExecStatus
00060   Channel<A,B>::post(Home home, A x0, B x1) {
00061     GECODE_ME_CHECK(x0.eq(home,FloatVal(Int::Limits::min,
00062                                         Int::Limits::max)));
00063     (void) new (home) Channel<A,B>(home,x0,x1);
00064     return ES_OK;
00065   }
00066 
00067   template<class A, class B>
00068   ExecStatus
00069   Channel<A,B>::propagate(Space& home, const ModEventDelta&) {
00070     GECODE_ME_CHECK(x1.gq(home,static_cast<int>(std::ceil(x0.min()))));
00071     GECODE_ME_CHECK(x1.lq(home,static_cast<int>(std::floor(x0.max()))));
00072     GECODE_ME_CHECK(x0.eq(home,FloatVal(x1.min(),x1.max())));
00073     return x0.assigned() ? home.ES_SUBSUMED(*this) : ES_FIX;
00074   }
00075 
00076 }}}
00077 
00078 // STATISTICS: float-prop
00079