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qsocket.h

/****************************************************************************
** $Id: qt/src/network/qsocket.h   2.2.1   edited 2000-09-12 $
**
** 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();

private:
    QSocketPrivate *d;

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

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