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/*
* Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
*
* Distributable under the terms of either the Apache License (Version 2.0) or
* the GNU Lesser General Public License, as specified in the COPYING file.
*
* Changes are Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies), all rights reserved.
*/
#ifndef _lucene_util_BitSet_
#define _lucene_util_BitSet_
#if defined(_LUCENE_PRAGMA_ONCE)
# pragma once
#endif
#include <QtCore/QString>
#include "CLucene/store/Directory.h"
CL_NS_DEF(util)
class BitSet : LUCENE_BASE
{
public:
// Create a bitset with the specified size
BitSet (int32_t size);
BitSet(CL_NS(store)::Directory* d, const QString& name);
void write(CL_NS(store)::Directory* d, const QString& name);
// Destructor for the bit set
~BitSet();
// get the value of the specified bit
inline bool get(const int32_t bit) const
{
return (bits[bit >> 3] & (1 << (bit & 7))) != 0;
}
// set the value of the specified bit
void set(int32_t bit, bool val = true);
///returns the size of the bitset
int32_t size() const;
// Returns the total number of one bits in this BitSet. This is
// efficiently computed and cached, so that, if the BitSet is not changed,
// no recomputation is done for repeated calls.
int32_t count();
BitSet *clone() const;
protected:
BitSet(const BitSet& copy);
private:
int32_t _size;
int32_t _count;
uint8_t *bits;
};
CL_NS_END
#endif
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