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# qsocket.h

This is the verbatim text of the qsocket.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id$
    **
    ** Definition of QSocket class.
    **
    ** Created : 970521
    **
    ** Copyright (C) 1992-2002 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the network module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition licenses may use this
    ** file in accordance with the Qt Commercial License Agreement provided
    ** with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
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    **********************************************************************/

    #ifndef QSOCKET_H
    #define QSOCKET_H

    #ifndef QT_H
    #include "qobject.h"
    #include "qiodevice.h"
    #include "qhostaddress.h" // int->QHostAddress conversion
    #endif // QT_H

    #if !defined( QT_MODULE_NETWORK ) || defined( QT_LICENSE_PROFESSIONAL ) || defined( QT_INTERNAL_NETWORK )
    #define QM_EXPORT_NETWORK
    #else
    #define QM_EXPORT_NETWORK Q_EXPORT
    #endif

    #ifndef QT_NO_NETWORK
    class QSocketPrivate;
    class QSocketDevice;

    class QM_EXPORT_NETWORK QSocket : public QObject, public QIODevice
    {
        Q_OBJECT
    public:
        enum Error {
    	ErrConnectionRefused,
    	ErrHostNotFound,
    	ErrSocketRead
        };

        QSocket( QObject *parent=0, const char *name=0 );
        virtual ~QSocket();

        enum State { Idle, HostLookup, Connecting,
    		 Connected, Closing,
    		 Connection=Connected };
        State	 state() const;

        int		 socket() const;
        virtual void setSocket( int );

        QSocketDevice *socketDevice();
        virtual void setSocketDevice( QSocketDevice * );

    #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( int mode );
        void	 close();
        void	 flush();
        Offset	 size() const;
        Offset	 at() const;
        bool	 at( Offset );
        bool	 atEnd() const;

        Q_ULONG	 bytesAvailable() const; // ### QIODevice::Offset instead?
        Q_ULONG	 waitForMore( int msecs, bool *timeout  ) const;
        Q_ULONG	 waitForMore( int msecs ) const; // ### Qt 4.0: merge the two overloads
        Q_ULONG	 bytesToWrite() const;
        void	 clearPendingData();

        Q_LONG	 readBlock( char *data, Q_ULONG maxlen );
        Q_LONG	 writeBlock( const char *data, Q_ULONG len );
        Q_LONG	 readLine( char *data, Q_ULONG maxlen );

        int		 getch();
        int		 putch( int );
        int		 ungetch(int);

        bool	 canReadLine() const;
        virtual	 QString readLine();

        Q_UINT16	 port() const;
        Q_UINT16	 peerPort() const;
        QHostAddress address() const;
        QHostAddress peerAddress() const;

    signals:
        void	 hostFound();
        void	 connected();
        void	 connectionClosed();
        void	 delayedCloseFinished();
        void	 readyRead();
        void	 bytesWritten( int nbytes );
        void	 error( int );

    protected slots:
        virtual void sn_read( bool force=FALSE );
        virtual void sn_write();

    private slots:
        void	tryConnecting();
        void	emitErrorConnectionRefused();

    private:
        QSocketPrivate *d;

        bool	 consumeReadBuf( Q_ULONG nbytes, char * );
        bool	 consumeWriteBuf( Q_ULONG nbytes );
        bool	 scanNewline( QByteArray * = 0 );
        void	 tryConnection();
        void         setSocketIntern( int socket );

    private:	// Disabled copy constructor and operator=
    #if defined(Q_DISABLE_COPY)
        QSocket( const QSocket & );
        QSocket &operator=( const QSocket & );
    #endif
    };

    #endif //QT_NO_NETWORK
    #endif // QSOCKET_H