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# qbitarray.h

This is the verbatim text of the qbitarray.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id:  qt/qbitarray.h   3.0.0   edited Jun 22 12:41 $
    **
    ** Definition of QBitArray class
    **
    ** Created : 940118
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the tools module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
    ** licenses may use this file in accordance with the Qt Commercial License
    ** Agreement provided with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
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    **********************************************************************/

    #ifndef QBITARRAY_H
    #define QBITARRAY_H

    #ifndef QT_H
    #include "qstring.h"
    #endif // QT_H

    /*****************************************************************************
      QBitVal class; a context class for QBitArray::operator[]
     *****************************************************************************/

    class QBitArray;

    class Q_EXPORT QBitVal
    {
    private:
        QBitArray *array;
        uint    index;
    public:
        QBitVal( QBitArray *a, uint i ) : array(a), index(i) {}
        operator int();
        QBitVal &operator=( const QBitVal &v );
        QBitVal &operator=( bool v );
    };

    /*****************************************************************************
      QBitArray class
     *****************************************************************************/

    class Q_EXPORT QBitArray : public QByteArray
    {
    public:
        QBitArray();
        QBitArray( uint size );
        QBitArray( const QBitArray &a ) : QByteArray( a ) {}

        QBitArray &operator=( const QBitArray & );

        uint    size() const;
        bool    resize( uint size );

        bool    fill( bool v, int size = -1 );

        void    detach();
        QBitArray copy() const;

        bool    testBit( uint index ) const;
        void    setBit( uint index );
        void    setBit( uint index, bool value );
        void    clearBit( uint index );
        bool    toggleBit( uint index );

        bool    at( uint index ) const;
        QBitVal operator[]( int index );
        bool operator[]( int index ) const;

        QBitArray &operator&=( const QBitArray & );
        QBitArray &operator|=( const QBitArray & );
        QBitArray &operator^=( const QBitArray & );
        QBitArray  operator~() const;

    protected:
        struct bitarr_data : public QGArray::array_data {
    	uint   nbits;
        };
        array_data *newData()		    { return new bitarr_data; }
        void	deleteData( array_data *d ) { delete (bitarr_data*)d; }
    private:
        void    pad0();
    };

    inline QBitArray &QBitArray::operator=( const QBitArray &a )
    { return (QBitArray&)assign( a ); }

    inline uint QBitArray::size() const
    { return ((bitarr_data*)sharedBlock())->nbits; }

    inline void QBitArray::setBit( uint index, bool value )
    { if ( value ) setBit(index); else clearBit(index); }

    inline bool QBitArray::at( uint index ) const
    { return testBit(index); }

    inline QBitVal QBitArray::operator[]( int index )
    { return QBitVal( (QBitArray*)this, index ); }

    inline bool QBitArray::operator[]( int index ) const
    { return testBit( index ); }

    /*****************************************************************************
      Misc. QBitArray operator functions
     *****************************************************************************/

    Q_EXPORT QBitArray operator&( const QBitArray &, const QBitArray & );
    Q_EXPORT QBitArray operator|( const QBitArray &, const QBitArray & );
    Q_EXPORT QBitArray operator^( const QBitArray &, const QBitArray & );

    inline QBitVal::operator int()
    {
        return array->testBit( index );
    }

    inline QBitVal &QBitVal::operator=( const QBitVal &v )
    {
        array->setBit( index, v.array->testBit(v.index) );
        return *this;
    }

    inline QBitVal &QBitVal::operator=( bool v )
    {
        array->setBit( index, v );
        return *this;
    }

    /*****************************************************************************
      QBitArray stream functions
     *****************************************************************************/
    #ifndef QT_NO_DATASTREAM
    Q_EXPORT QDataStream &operator<<( QDataStream &, const QBitArray & );
    Q_EXPORT QDataStream &operator>>( QDataStream &, QBitArray & );
    #endif

    #endif // QBITARRAY_H