Generated on Thu Mar 22 10:39:41 2012 for Gecode by doxygen 1.6.3

violations.hpp

Go to the documentation of this file.
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, 2009
00008  *
00009  *  Last modified:
00010  *     $Date: 2010-07-14 17:46:18 +0200 (Wed, 14 Jul 2010) $
00011  *     $Revision: 11192 $
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 <climits>
00039 #include <cmath>
00040 
00041 namespace Gecode { namespace Int { namespace Sequence {
00042 
00044   class Violations : public Support::BitSetBase {
00045   protected:
00047     mutable unsigned int fst;
00048   public:
00050     Violations(void);
00052     void init(Space& home, unsigned int n);
00054     void update(Space& home, bool shared, Violations& v);
00056     bool empty(void) const;
00058     void add(unsigned int i);
00060     unsigned int get(void);
00061   };
00062 
00063 
00064   forceinline
00065   Violations::Violations(void) : fst(0) {}
00066 
00067   forceinline void
00068   Violations::init(Space& home, unsigned int n) {
00069     Support::BitSetBase::init(home,n);
00070     fst=size();
00071   }
00072 
00073   forceinline bool
00074   Violations::empty(void) const {
00075     fst = next(fst);
00076     return fst >= size();
00077   }
00078   
00079   forceinline void
00080   Violations::update(Space& home, bool, Violations& v) {
00081     assert(v.empty());
00082     init(home,v.size());
00083   }
00084 
00085   forceinline void
00086   Violations::add(unsigned int i) {
00087     set(i); if (i < fst) fst = i;
00088   }
00089   
00090   forceinline unsigned int
00091   Violations::get(void) {
00092     assert(!empty());
00093     fst = next(fst);
00094     assert(Support::BitSetBase::get(fst));
00095     clear(fst); fst++;
00096     return fst-1;
00097   }
00098   
00099 }}}
00100 
00101 // STATISTICS: int-prop