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/****************************************************************************
** $Id$
**
** Definition of QIODevice class
**
** Created : 940913
**
** Copyright (C) 1992-2002 Trolltech AS. All rights reserved.
**
** This file is part of the tools 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 or Qt Professional 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 QIODEVICE_H
#define QIODEVICE_H
#ifndef QT_H
#include "qglobal.h"
#include "qcstring.h"
#endif // QT_H
// IO device access types
#define IO_Direct 0x0100 // direct access device
#define IO_Sequential 0x0200 // sequential access device
#define IO_Combined 0x0300 // combined direct/sequential
#define IO_TypeMask 0x0f00
// IO handling modes
#define IO_Raw 0x0040 // raw access (not buffered)
#define IO_Async 0x0080 // asynchronous mode
// IO device open modes
#define IO_ReadOnly 0x0001 // readable device
#define IO_WriteOnly 0x0002 // writable device
#define IO_ReadWrite 0x0003 // read+write device
#define IO_Append 0x0004 // append
#define IO_Truncate 0x0008 // truncate device
#define IO_Translate 0x0010 // translate CR+LF
#define IO_ModeMask 0x00ff
// IO device state
#define IO_Open 0x1000 // device is open
#define IO_StateMask 0xf000
// IO device status
#define IO_Ok 0
#define IO_ReadError 1 // read error
#define IO_WriteError 2 // write error
#define IO_FatalError 3 // fatal unrecoverable error
#define IO_ResourceError 4 // resource limitation
#define IO_OpenError 5 // cannot open device
#define IO_ConnectError 5 // cannot connect to device
#define IO_AbortError 6 // abort error
#define IO_TimeOutError 7 // time out
#define IO_UnspecifiedError 8 // unspecified error
class Q_EXPORT QIODevice
{
public:
#if defined(QT_ABI_64BITOFFSET)
typedef QtOffset Offset;
#else
typedef Q_ULONG Offset;
#endif
QIODevice();
virtual ~QIODevice();
int flags() const { return ioMode; }
int mode() const { return ioMode & IO_ModeMask; }
int state() const { return ioMode & IO_StateMask; }
bool isDirectAccess() const { return ((ioMode & IO_Direct) == IO_Direct); }
bool isSequentialAccess() const { return ((ioMode & IO_Sequential) == IO_Sequential); }
bool isCombinedAccess() const { return ((ioMode & IO_Combined) == IO_Combined); }
bool isBuffered() const { return ((ioMode & IO_Raw) != IO_Raw); }
bool isRaw() const { return ((ioMode & IO_Raw) == IO_Raw); }
bool isSynchronous() const { return ((ioMode & IO_Async) != IO_Async); }
bool isAsynchronous() const { return ((ioMode & IO_Async) == IO_Async); }
bool isTranslated() const { return ((ioMode & IO_Translate) == IO_Translate); }
bool isReadable() const { return ((ioMode & IO_ReadOnly) == IO_ReadOnly); }
bool isWritable() const { return ((ioMode & IO_WriteOnly) == IO_WriteOnly); }
bool isReadWrite() const { return ((ioMode & IO_ReadWrite) == IO_ReadWrite); }
bool isInactive() const { return state() == 0; }
bool isOpen() const { return state() == IO_Open; }
int status() const { return ioSt; }
void resetStatus() { ioSt = IO_Ok; }
virtual bool open( int mode ) = 0;
virtual void close() = 0;
virtual void flush() = 0;
virtual Offset size() const = 0;
virtual Offset at() const;
virtual bool at( Offset );
virtual bool atEnd() const;
bool reset() { return at(0); }
virtual Q_LONG readBlock( char *data, Q_ULONG maxlen ) = 0;
virtual Q_LONG writeBlock( const char *data, Q_ULONG len ) = 0;
virtual Q_LONG readLine( char *data, Q_ULONG maxlen );
Q_LONG writeBlock( const QByteArray& data );
virtual QByteArray readAll();
virtual int getch() = 0;
virtual int putch( int ) = 0;
virtual int ungetch( int ) = 0;
protected:
void setFlags( int f ) { ioMode = f; }
void setType( int );
void setMode( int );
void setState( int );
void setStatus( int );
Offset ioIndex;
private:
int ioMode;
int ioSt;
private: // Disabled copy constructor and operator=
#if defined(Q_DISABLE_COPY)
QIODevice( const QIODevice & );
QIODevice &operator=( const QIODevice & );
#endif
};
#endif // QIODEVICE_H
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