/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtDeclarative module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, 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.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef QPACKETPROTOCOL_H

#define QPACKETPROTOCOL_H

#include <QtCore/qobject.h>

#include <QtCore/qdatastream.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

class QIODevice;

class QBuffer;

class QPacket;

class QPacketAutoSend;

class QPacketProtocolPrivate;

class Q_DECLARATIVE_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();

    void clear();

    QIODevice * device();

Q_SIGNALS:

    void readyRead();

    void invalidPacket();

    void packetWritten();

private:

    QPacketProtocolPrivate * d;

};

class Q_DECLARATIVE_EXPORT QPacket : public QDataStream

{

public:

    QPacket();

    QPacket(const QPacket &);

    virtual ~QPacket();

    void clear();

    bool isEmpty() const;

protected:

    friend class QPacketProtocol;

    QPacket(const QByteArray & ba);

    QByteArray b;

    QBuffer * buf;

};

class Q_DECLARATIVE_EXPORT QPacketAutoSend : public QPacket

{

public:

    virtual ~QPacketAutoSend();

private:

    friend class QPacketProtocol;

    QPacketAutoSend(QPacketProtocol *);

    QPacketProtocol * p;

};

QT_END_NAMESPACE

QT_END_HEADER

#endif