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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: qt/src/network/qsocket.h   2.3.7   edited 2001-07-24 $
    **
    ** Definition of QSocket class.
    **
    ** Created : 970521
    **
    ** Copyright (C) 1992-2000 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
    ** not clear to you.
    **
    **********************************************************************/

    #ifndef QSOCKET_H
    #define QSOCKET_H

    #ifndef QT_H
    #include "qsocketdevice.h"
    #include "qsocketnotifier.h"
    #endif // QT_H

    #ifndef QT_NO_NETWORK
    class QSocketPrivate;

    class Q_EXPORT 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,
                     Listening, Connection, Closing };
        State        state() const;

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

    #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();
        uint         size() const;
        int          at() const;
        bool         at( int );
        bool         atEnd() const;

        int          bytesAvailable() const;
        int          waitForMore( int msecs ) const;
        int          bytesToWrite() const;

        int          readBlock( char *data, uint maxlen );
        int          writeBlock( const char *data, uint len );
        int          readLine( char *data, uint 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();
        virtual void sn_write();

    protected:
        QSocketDevice *socketDevice();

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

    private:
        QSocketPrivate *d;

        bool         consumeReadBuf( int nbytes, char * );
        bool         consumeWriteBuf( int 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