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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** 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 ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QPACKETPROTOCOL_H
#define QPACKETPROTOCOL_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/qobject.h>
#include <QtCore/qdatastream.h>

#include <private/qtqmlglobal_p.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE


class QIODevice;
class QBuffer;
class QPacket;
class QPacketAutoSend;
class QPacketProtocolPrivate;

class Q_QML_PRIVATE_EXPORT QPacketProtocol : public QObject
{
    Q_OBJECT
public:
    explicit QPacketProtocol(QIODevice *dev, QObject *parent = 0);
    virtual ~QPacketProtocol();

    qint32 maximumPacketSize() const;
    qint32 setMaximumPacketSize(qint32);

    QPacketAutoSend send();
    void send(const QPacket &);

    qint64 packetsAvailable() const;
    QPacket read();

    bool waitForReadyRead(int msecs = 3000);

    void clear();

    QIODevice *device();

Q_SIGNALS:
    void readyRead();
    void invalidPacket();
    void packetWritten();

private:
    QPacketProtocolPrivate *d;
};


class Q_QML_PRIVATE_EXPORT QPacket : public QDataStream
{
public:
    QPacket();
    QPacket(const QPacket &);
    virtual ~QPacket();

    void clear();
    bool isEmpty() const;
    QByteArray data() const;

protected:
    friend class QPacketProtocol;
    QPacket(const QByteArray &ba);
    QByteArray b;
    QBuffer *buf;
};

class Q_QML_PRIVATE_EXPORT QPacketAutoSend : public QPacket
{
public:
    virtual ~QPacketAutoSend();

private:
    friend class QPacketProtocol;
    QPacketAutoSend(QPacketProtocol *);
    QPacketProtocol *p;
};

QT_END_NAMESPACE

QT_END_HEADER

#endif