qgarray.h

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/****************************************************************************
** $Id: qgarray.h,v 1.2 2003/07/10 02:40:11 llornkcor Exp $
**
** Definition of QGArray class
**
** Created : 930906
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
**
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** 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.
**
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** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
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#ifndef QGARRAY_H
#define QGARRAY_H

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


class Q_EXPORT QGArray                                  // generic array
{
friend class QBuffer;
public:
    //### DO NOT USE THIS.  IT IS PUBLIC BUT DO NOT USE IT IN NEW CODE.
    struct array_data : public QShared {        // shared array
        array_data():data(0),len(0)
#ifdef QT_QGARRAY_SPEED_OPTIM
                    ,maxl(0)
#endif
            {}
        char *data;                             // actual array data
        uint  len;
#ifdef QT_QGARRAY_SPEED_OPTIM
        uint maxl;
#endif
    };
    QGArray();
    enum Optimization { MemOptim, SpeedOptim };
protected:
    QGArray( int, int );                        // dummy; does not alloc
    QGArray( int size );                        // allocate 'size' bytes
    QGArray( const QGArray &a );                // shallow copy
    virtual ~QGArray();

    QGArray    &operator=( const QGArray &a ) { return assign( a ); }

    virtual void detach()       { duplicate(*this); }

    // ### Qt 4.0: maybe provide two versions of data(), at(), etc.
    char       *data()   const  { return shd->data; }
    uint        nrefs()  const  { return shd->count; }
    uint        size()   const  { return shd->len; }
    bool        isEqual( const QGArray &a ) const;

    bool        resize( uint newsize, Optimization optim );
    bool        resize( uint newsize );

    bool        fill( const char *d, int len, uint sz );

    QGArray    &assign( const QGArray &a );
    QGArray    &assign( const char *d, uint len );
    QGArray    &duplicate( const QGArray &a );
    QGArray    &duplicate( const char *d, uint len );
    void        store( const char *d, uint len );

    array_data *sharedBlock()   const           { return shd; }
    void        setSharedBlock( array_data *p ) { shd=(array_data*)p; }

    QGArray    &setRawData( const char *d, uint len );
    void        resetRawData( const char *d, uint len );

    int         find( const char *d, uint index, uint sz ) const;
    int         contains( const char *d, uint sz ) const;

    void        sort( uint sz );
    int         bsearch( const char *d, uint sz ) const;

    char       *at( uint index ) const;

    bool        setExpand( uint index, const char *d, uint sz );

protected:
    virtual array_data *newData();
    virtual void deleteData( array_data *p );

private:
    static void msg_index( uint );
    array_data *shd;
};


inline char *QGArray::at( uint index ) const
{
#if defined(QT_CHECK_RANGE)
    if ( index >= size() ) {
        msg_index( index );
        index = 0;
    }
#endif
    return &shd->data[index];
}


#endif // QGARRAY_H

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