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val-commit.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  *  Contributing authors:
00007  *     Vincent Barichard <Vincent.Barichard@univ-angers.fr>
00008  *
00009  *  Copyright:
00010  *     Christian Schulte, 2012
00011  *     Vincent Barichard, 2012
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 Float { namespace Branch {
00039 
00040   forceinline
00041   ValCommitLqGq::ValCommitLqGq(Space& home, const ValBranch<Var>& vb)
00042     : ValCommit<FloatView,FloatVal>(home,vb) {}
00043   forceinline
00044   ValCommitLqGq::ValCommitLqGq(Space& home, ValCommitLqGq& vc)
00045     : ValCommit<FloatView,FloatVal>(home,vc) {}
00046   forceinline ModEvent
00047   ValCommitLqGq::commit(Space& home, unsigned int a, FloatView x, int,
00048                         FloatNumBranch nl) {
00049     // Should we try the smaller half first?
00050     if ((a == 0) == nl.l) {
00051       if ((x.min() == nl.n) || (x.max() == nl.n))
00052         return x.eq(home,x.min());
00053       else
00054         return x.lq(home,nl.n);
00055     } else {
00056       if ((x.min() == nl.n) || (x.max() == nl.n))
00057         return x.eq(home,x.max());
00058       else
00059         return x.gq(home,nl.n);
00060     }
00061   }
00062   forceinline NGL*
00063   ValCommitLqGq::ngl(Space&, unsigned int, FloatView, FloatNumBranch) const {
00064     return NULL;
00065   }
00066   forceinline void
00067   ValCommitLqGq::print(const Space&, unsigned int a, FloatView, int i,
00068                        FloatNumBranch nl,
00069                        std::ostream& o) const {
00070     o << "var[" << i << "] "
00071       << (((a == 0) == nl.l) ? "<=" : ">=") << "(" << nl.n << ")";
00072   }
00073 
00074 }}}
00075 
00076 // STATISTICS: float-branch
00077