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#ifndef Q3SOCKET_H

#define Q3SOCKET_H

#include <QtCore/qiodevice.h>

#include <QtNetwork/qhostaddress.h> // int->QHostAddress conversion

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Qt3Support)

class Q3SocketPrivate;

class Q3SocketDevice;

class Q_COMPAT_EXPORT Q3Socket : public QIODevice

{

    Q_OBJECT

public:

    enum Error {

	ErrConnectionRefused,

	ErrHostNotFound,

	ErrSocketRead

    };

    Q3Socket( QObject *parent=0, const char *name=0 );

    virtual ~Q3Socket();

    enum State { Idle, HostLookup, Connecting,

		 Connected, Closing,

		 Connection=Connected };

    State	 state() const;

    int		 socket() const;

    virtual void setSocket( int );

    Q3SocketDevice *socketDevice();

    virtual void setSocketDevice( Q3SocketDevice * );

#ifndef QT_NO_DNS

    virtual void connectToHost( const QString &host, Q_UINT16 port );

#endif

    QString	 peerName() const;

    // Implementation of QIODevice abstract virtual functions

    bool	 open( OpenMode mode );

    bool      open(int mode) { return open((OpenMode)mode); }

    void	 close();

    bool	 flush();

    Offset	 size() const;

    Offset	 at() const;

    bool	 at( Offset );

    bool	 atEnd() const;

    qint64	 bytesAvailable() const;

    Q_ULONG	 waitForMore( int msecs, bool *timeout  ) const;

    Q_ULONG	 waitForMore( int msecs ) const; // ### Qt 4.0: merge the two overloads

    qint64	 bytesToWrite() const;

    void	 clearPendingData();

    int		 getch();

    int		 putch( int );

    int		 ungetch(int);

    bool	 canReadLine() const;

    Q_UINT16	 port() const;

    Q_UINT16	 peerPort() const;

    QHostAddress address() const;

    QHostAddress peerAddress() const;

    void	 setReadBufferSize( Q_ULONG );

    Q_ULONG	 readBufferSize() const;

    inline bool  isSequential() const { return true; }

Q_SIGNALS:

    void	 hostFound();

    void	 connected();

    void	 connectionClosed();

    void	 delayedCloseFinished();

    void	 readyRead();

    void	 bytesWritten( int nbytes );

    void	 error( int );

protected Q_SLOTS:

    virtual void sn_read( bool force=false );

    virtual void sn_write();

protected:

    qint64 readData(char *data, qint64 maxlen);

    qint64 writeData(const char *data, qint64 len);

private Q_SLOTS:

    void	tryConnecting();

    void	emitErrorConnectionRefused();

private:

    Q3SocketPrivate *d;

    bool	 consumeWriteBuf( Q_ULONG nbytes );

    void	 tryConnection();

    void         setSocketIntern( int socket );

private:	// Disabled copy constructor and operator=

#if defined(Q_DISABLE_COPY)

    Q3Socket( const Q3Socket & );

    Q3Socket &operator=( const Q3Socket & );

#endif

};

QT_END_NAMESPACE

QT_END_HEADER

#endif // Q3SOCKET_H