qgarray.h

/****************************************************************************
** 
**
** 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
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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; }
    char *data;             // actual array data
    uint  len;
    };
    QGArray();
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); }

    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 );

    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(CHECK_RANGE)
    if ( index >= size() ) {
    msg_index( index );
    index = 0;
    }
#endif
    return &shd->data[index];
}


#endif // QGARRAY_H