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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QBITARRAY_H
#define QBITARRAY_H
#include <QtCore/qbytearray.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Core)
class QBitRef;
class Q_CORE_EXPORT QBitArray
{
friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QBitArray &);
friend Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QBitArray &);
friend Q_CORE_EXPORT uint qHash(const QBitArray &key);
QByteArray d;
public:
inline QBitArray() {}
explicit QBitArray(int size, bool val = false);
QBitArray(const QBitArray &other) : d(other.d) {}
inline QBitArray &operator=(const QBitArray &other) { d = other.d; return *this; }
inline int size() const { return (d.size() << 3) - *d.constData(); }
inline int count() const { return (d.size() << 3) - *d.constData(); }
int count(bool on) const;
// ### Qt 5: Store the number of set bits separately
inline bool isEmpty() const { return d.isEmpty(); }
inline bool isNull() const { return d.isNull(); }
void resize(int size);
inline void detach() { d.detach(); }
inline bool isDetached() const { return d.isDetached(); }
inline void clear() { d.clear(); }
bool testBit(int i) const;
void setBit(int i);
void setBit(int i, bool val);
void clearBit(int i);
bool toggleBit(int i);
bool at(int i) const;
QBitRef operator[](int i);
bool operator[](int i) const;
QBitRef operator[](uint i);
bool operator[](uint i) const;
QBitArray& operator&=(const QBitArray &);
QBitArray& operator|=(const QBitArray &);
QBitArray& operator^=(const QBitArray &);
QBitArray operator~() const;
inline bool operator==(const QBitArray& a) const { return d == a.d; }
inline bool operator!=(const QBitArray& a) const { return d != a.d; }
inline bool fill(bool val, int size = -1);
void fill(bool val, int first, int last);
inline void truncate(int pos) { if (pos < size()) resize(pos); }
public:
typedef QByteArray::DataPtr DataPtr;
inline DataPtr &data_ptr() { return d.data_ptr(); }
};
inline bool QBitArray::fill(bool aval, int asize)
{ *this = QBitArray((asize < 0 ? this->size() : asize), aval); return true; }
Q_CORE_EXPORT QBitArray operator&(const QBitArray &, const QBitArray &);
Q_CORE_EXPORT QBitArray operator|(const QBitArray &, const QBitArray &);
Q_CORE_EXPORT QBitArray operator^(const QBitArray &, const QBitArray &);
inline bool QBitArray::testBit(int i) const
{ Q_ASSERT(i >= 0 && i < size());
return (*(reinterpret_cast<const uchar*>(d.constData())+1+(i>>3)) & (1 << (i & 7))) != 0; }
inline void QBitArray::setBit(int i)
{ Q_ASSERT(i >= 0 && i < size());
*(reinterpret_cast<uchar*>(d.data())+1+(i>>3)) |= (1 << (i & 7)); }
inline void QBitArray::clearBit(int i)
{ Q_ASSERT(i >= 0 && i < size());
*(reinterpret_cast<uchar*>(d.data())+1+(i>>3)) &= ~(1 << (i & 7)); }
inline void QBitArray::setBit(int i, bool val)
{ if (val) setBit(i); else clearBit(i); }
inline bool QBitArray::toggleBit(int i)
{ Q_ASSERT(i >= 0 && i < size());
uchar b = 1<< (i&7); uchar* p = reinterpret_cast<uchar*>(d.data())+1+(i>>3);
uchar c = *p&b; *p^=b; return c!=0; }
inline bool QBitArray::operator[](int i) const { return testBit(i); }
inline bool QBitArray::operator[](uint i) const { return testBit(i); }
inline bool QBitArray::at(int i) const { return testBit(i); }
class Q_CORE_EXPORT QBitRef
{
private:
QBitArray& a;
int i;
inline QBitRef(QBitArray& array, int idx) : a(array), i(idx) {}
friend class QBitArray;
public:
inline operator bool() const { return a.testBit(i); }
inline bool operator!() const { return !a.testBit(i); }
QBitRef& operator=(const QBitRef& val) { a.setBit(i, val); return *this; }
QBitRef& operator=(bool val) { a.setBit(i, val); return *this; }
};
inline QBitRef QBitArray::operator[](int i)
{ Q_ASSERT(i >= 0); return QBitRef(*this, i); }
inline QBitRef QBitArray::operator[](uint i)
{ return QBitRef(*this, i); }
#ifndef QT_NO_DATASTREAM
Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QBitArray &);
Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QBitArray &);
#endif
Q_DECLARE_TYPEINFO(QBitArray, Q_MOVABLE_TYPE);
Q_DECLARE_SHARED(QBitArray)
QT_END_NAMESPACE
QT_END_HEADER
#endif // QBITARRAY_H
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