values-bitset.hpp

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2008
 *
 *  Last modified:
 *     $Date: 2010-07-28 17:35:33 +0200 (Wed, 28 Jul 2010) $ by $Author: schulte $
 *     $Revision: 11294 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
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namespace Gecode { namespace Iter { namespace Values {

  template<class BS>
  class BitSet {
  protected:
    const BS& bs;
    unsigned int cur;
    unsigned int limit;
    void move(void);
  public:


    BitSet(const BS& bs);
    BitSet(const BS& bs, int n, int m);



    bool operator ()(void) const;
    void operator ++(void);



    int val(void) const;
  };


  template<class BS>
  forceinline
  BitSet<BS>::BitSet(const BS& bs0) 
    : bs(bs0), cur(bs.next(0)), limit(bs.size()) {
  }

  template<class BS>
  forceinline
  BitSet<BS>::BitSet(const BS& bs0, int n, int m) 
    : bs(bs0), 
      cur(bs.next(static_cast<unsigned int>(n))), 
      limit(std::min(bs.size(),static_cast<unsigned int>(m)+1)) {
  }

  template<class BS>
  forceinline void
  BitSet<BS>::operator ++(void) {
    cur=bs.next(cur+1);
  }
  template<class BS>
  forceinline bool
  BitSet<BS>::operator ()(void) const {
    return cur < limit;
  }

  template<class BS>
  forceinline int
  BitSet<BS>::val(void) const {
    return static_cast<int>(cur);
  }

}}}

// STATISTICS: iter-any