/****************************************************************************
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the Qt3Support module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
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****************************************************************************/

#ifndef Q3PTRSTACK_H
#define Q3PTRSTACK_H

#include <Qt3Support/q3glist.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Qt3SupportLight)

template<class type>
class Q3PtrStack : protected Q3GList
{
public:
    Q3PtrStack()				{ }
    Q3PtrStack( const Q3PtrStack<type> &s ) : Q3GList( s ) { }
    ~Q3PtrStack()			{ clear(); }
    Q3PtrStack<type> &operator=(const Q3PtrStack<type> &s)
			{ return (Q3PtrStack<type>&)Q3GList::operator=(s); }
    bool  autoDelete() const		{ return Q3PtrCollection::autoDelete(); }
    void  setAutoDelete( bool del )	{ Q3PtrCollection::setAutoDelete(del); }
    uint  count()   const		{ return Q3GList::count(); }
    bool  isEmpty() const		{ return Q3GList::count() == 0; }
    void  push( const type *d )		{ Q3GList::insertAt(0,Item(d)); }
    type *pop()				{ return (type *)Q3GList::takeFirst(); }
    bool  remove()			{ return Q3GList::removeFirst(); }
    void  clear()			{ Q3GList::clear(); }
    type *top()	    const		{ return (type *)Q3GList::cfirst(); }
	  operator type *() const	{ return (type *)Q3GList::cfirst(); }
    type *current() const		{ return (type *)Q3GList::cfirst(); }

#ifdef qdoc
protected:
    virtual QDataStream& read( QDataStream&, Q3PtrCollection::Item& );
    virtual QDataStream& write( QDataStream&, Q3PtrCollection::Item ) const;
#endif

private:
    void  deleteItem( Item d );
};

#if !defined(Q_BROKEN_TEMPLATE_SPECIALIZATION)
template<> inline void Q3PtrStack<void>::deleteItem( Q3PtrCollection::Item )
{
}
#endif

template<class type> inline void Q3PtrStack<type>::deleteItem( Q3PtrCollection::Item d )
{
    if ( del_item ) delete (type *)d;
}

QT_END_NAMESPACE

QT_END_HEADER

#endif // Q3PTRSTACK_H