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#ifndef QPACKETPROTOCOL_H
#define QPACKETPROTOCOL_H

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

QT_BEGIN_NAMESPACE
class QIODevice;
class QBuffer;
QT_END_NAMESPACE
class QPacket;
class QPacketAutoSend;
class QPacketProtocolPrivate;

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

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

#endif
