Qt Toolkit - qqueue.h include file

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# qqueue.h

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

    /****************************************************************************
    ** $Id: qt/src/tools/qqueue.h   2.3.2   edited 2001-07-29 $
    **
    ** Definition of QQueue template/macro class
    **
    ** Created : 920917
    **
    ** 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
    ** not clear to you.
    **
    **********************************************************************/

    #ifndef QQUEUE_H
    #define QQUEUE_H

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

    template<class type> class QQueue : private QGList
    {
    public:
        QQueue()                            {}
        QQueue( const QQueue<type> &q ) : QGList(q) {}
       ~QQueue()                            { clear(); }
        QQueue<type>& operator=(const QQueue<type> &q)
                            { return (QQueue<type>&)QGList::operator=(q); }
        bool  autoDelete() const            { return QCollection::autoDelete(); }
        void  setAutoDelete( bool del )     { QCollection::setAutoDelete(del); }
        uint  count()   const               { return QGList::count(); }
        bool  isEmpty() const               { return QGList::count() == 0; }
        void  enqueue( const type *d )      { QGList::append(Item(d)); }
        type *dequeue()                     { return (type *)QGList::takeFirst();}
        bool  remove()                      { return QGList::removeFirst(); }
        void  clear()                       { QGList::clear(); }
        type *head()    const               { return (type *)QGList::cfirst(); }
              operator type *() const       { return (type *)QGList::cfirst(); }
        type *current() const               { return (type *)QGList::cfirst(); }
    private:
        void  deleteItem( Item d );
    };

    #if defined(Q_DELETING_VOID_UNDEFINED)
    template<> inline void QQueue<void>::deleteItem( Item )
    {
    }
    #endif

    template<class type> inline void QQueue<type>::deleteItem( QCollection::Item d )
    {
        if ( del_item ) delete (type *)d;
    }

    #endif // QQUEUE_H