qgarray.h

/****************************************************************************
** $Id: qgarray.h,v 2.4.2.1 1998/08/19 16:02:36 agulbra Exp $
**
** Definition of QGArray class
**
** Created : 930906
**
** Copyright (C) 1992-1998 Troll Tech AS.  All rights reserved.
**
** This file is part of Qt Free Edition, version 1.42.
**
** See the file LICENSE included in the distribution for the usage
** and distribution terms, or http://www.troll.no/free-license.html.
**
** IMPORTANT NOTE: You may NOT copy this file or any part of it into
** your own programs or libraries.
**
** Please see http://www.troll.no/pricing.html for information about 
** Qt Professional Edition, which is this same library but with a
** license which allows creation of commercial/proprietary software.
**
*****************************************************************************/

#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:
    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;

    char       *at( uint index ) const;

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

protected:
    virtual array_data *newData()                   { return new array_data; }
    virtual void        deleteData( array_data *p ) { delete 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