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values-bitsetoffset.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2008
8  *
9  * Converted into offset version:
10  * Christopher Mears <chris.mears@monash.edu>
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12  * Last modified:
13  * $Date: 2013-03-07 02:18:29 +0100 (Thu, 07 Mar 2013) $ by $Author: mears $
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40 
41 namespace Gecode { namespace Iter { namespace Values {
42 
48  template<class BS>
49  class BitSetOffset {
50  protected:
52  const BS& bs;
54  int cur;
56  int limit;
58  void move(void);
59  public:
61 
62  BitSetOffset(const BS& bs);
65  BitSetOffset(const BS& bs, int n, int m);
67 
69 
70  bool operator ()(void) const;
73  void operator ++(void);
75 
77 
78  int val(void) const;
81  };
82 
83 
84  template<class BS>
87  : bs(bs0), cur(bs.next(bs0.offset())), limit(bs.offset()+bs.size()) {
88  }
89 
90  template<class BS>
92  BitSetOffset<BS>::BitSetOffset(const BS& bs0, int n, int m)
93  : bs(bs0),
94  cur(bs.next(n)),
95  limit(std::min(bs.offset()+bs.size(),m+1)) {
96  }
97 
98  template<class BS>
99  forceinline void
101  cur=bs.next(cur+1);
102  }
103  template<class BS>
104  forceinline bool
106  return cur < limit;
107  }
108 
109  template<class BS>
110  forceinline int
111  BitSetOffset<BS>::val(void) const {
112  return static_cast<int>(cur);
113  }
114 
115 }}}
116 
117 // STATISTICS: iter-any
void move(void)
Move to next set bit.
BitSetOffset(const BS &bs)
Initialize with bitset bs.
void operator++(void)
Move iterator to next value (if possible)
bool operator()(void) const
Test whether iterator is still at a value or done.
int n
Number of negative literals for node type.
Definition: bool-expr.cpp:238
unsigned int size(I &i)
Size of all ranges of range iterator i.
void min(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition: arithmetic.cpp:75
Value iterator for values in an offset bitset.
#define forceinline
Definition: config.hpp:132
int val(void) const
Return current value.
Gecode toplevel namespace