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

#ifndef QPACKETPROTOCOL_H
#define QPACKETPROTOCOL_H

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

#include <private/qdeclarativeglobal_p.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

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

class Q_DECLARATIVE_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();

    void clear();

    QIODevice * device();

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

private:
    QPacketProtocolPrivate * d;
};


class Q_DECLARATIVE_PRIVATE_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_PRIVATE_EXPORT QPacketAutoSend : public QPacket
{
public:
    virtual ~QPacketAutoSend();

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

QT_END_NAMESPACE

QT_END_HEADER

#endif