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161 lines
5.6 KiB
161 lines
5.6 KiB
/****************************************************************************
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**
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** Definition of TQIODevice class
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**
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** Created : 940913
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of the tools module of the TQt GUI Toolkit.
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**
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** This file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the files LICENSE.GPL2
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** and LICENSE.GPL3 included in the packaging of this file.
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** Alternatively you may (at your option) use any later version
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** of the GNU General Public License if such license has been
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** publicly approved by Trolltech ASA (or its successors, if any)
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** and the KDE Free TQt Foundation.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** This file may be used under the terms of the Q Public License as
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** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
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** included in the packaging of this file. Licensees holding valid TQt
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** Commercial licenses may use this file in accordance with the TQt
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** Commercial License Agreement provided with the Software.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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** herein.
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**
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**********************************************************************/
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#ifndef TQIODEVICE_H
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#define TQIODEVICE_H
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#ifndef QT_H
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#include "ntqglobal.h"
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#include "ntqcstring.h"
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#endif // QT_H
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// IO device access types
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#define IO_Direct 0x0100 // direct access device
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#define IO_Sequential 0x0200 // sequential access device
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#define IO_Combined 0x0300 // combined direct/sequential
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#define IO_TypeMask 0x0f00
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// IO handling modes
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#define IO_Raw 0x0040 // raw access (not buffered)
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#define IO_Async 0x0080 // asynchronous mode
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// IO device open modes
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#define IO_ReadOnly 0x0001 // readable device
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#define IO_WriteOnly 0x0002 // writable device
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#define IO_ReadWrite 0x0003 // read+write device
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#define IO_Append 0x0004 // append
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#define IO_Truncate 0x0008 // truncate device
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#define IO_Translate 0x0010 // translate CR+LF
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#define IO_ModeMask 0x00ff
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// IO device state
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#define IO_Open 0x1000 // device is open
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#define IO_StateMask 0xf000
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// IO device status
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#define IO_Ok 0
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#define IO_ReadError 1 // read error
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#define IO_WriteError 2 // write error
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#define IO_FatalError 3 // fatal unrecoverable error
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#define IO_ResourceError 4 // resource limitation
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#define IO_OpenError 5 // cannot open device
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#define IO_ConnectError 5 // cannot connect to device
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#define IO_AbortError 6 // abort error
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#define IO_TimeOutError 7 // time out
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#define IO_UnspecifiedError 8 // unspecified error
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class TQ_EXPORT TQIODevice
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{
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public:
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typedef TQ_ULONG Offset;
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TQIODevice();
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virtual ~TQIODevice();
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int flags() const { return ioMode; }
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int mode() const { return ioMode & IO_ModeMask; }
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int state() const { return ioMode & IO_StateMask; }
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bool isDirectAccess() const { return ((ioMode & IO_Direct) == IO_Direct); }
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bool isSequentialAccess() const { return ((ioMode & IO_Sequential) == IO_Sequential); }
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bool isCombinedAccess() const { return ((ioMode & IO_Combined) == IO_Combined); }
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bool isBuffered() const { return ((ioMode & IO_Raw) != IO_Raw); }
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bool isRaw() const { return ((ioMode & IO_Raw) == IO_Raw); }
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bool isSynchronous() const { return ((ioMode & IO_Async) != IO_Async); }
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bool isAsynchronous() const { return ((ioMode & IO_Async) == IO_Async); }
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bool isTranslated() const { return ((ioMode & IO_Translate) == IO_Translate); }
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bool isReadable() const { return ((ioMode & IO_ReadOnly) == IO_ReadOnly); }
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bool isWritable() const { return ((ioMode & IO_WriteOnly) == IO_WriteOnly); }
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bool isReadWrite() const { return ((ioMode & IO_ReadWrite) == IO_ReadWrite); }
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bool isInactive() const { return state() == 0; }
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bool isOpen() const { return state() == IO_Open; }
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int status() const { return ioSt; }
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void resetStatus() { ioSt = IO_Ok; }
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virtual bool open( int mode ) = 0;
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virtual void close() = 0;
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virtual void flush() = 0;
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virtual Offset size() const = 0;
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virtual Offset at() const;
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virtual bool at( Offset );
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virtual bool atEnd() const;
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bool reset() { return at(0); }
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virtual TQ_LONG readBlock( char *data, TQ_ULONG maxlen ) = 0;
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virtual TQ_LONG writeBlock( const char *data, TQ_ULONG len ) = 0;
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virtual TQ_LONG readLine( char *data, TQ_ULONG maxlen );
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TQ_LONG writeBlock( const TQByteArray& data );
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virtual TQByteArray readAll();
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virtual int getch() = 0;
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virtual int putch( int ) = 0;
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virtual int ungetch( int ) = 0;
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protected:
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void setFlags( int f ) { ioMode = f; }
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void setType( int );
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void setMode( int );
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void setState( int );
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void setStatus( int );
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Offset ioIndex;
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private:
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int ioMode;
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int ioSt;
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private: // Disabled copy constructor and operator=
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#if defined(TQ_DISABLE_COPY)
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TQIODevice( const TQIODevice & );
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TQIODevice &operator=( const TQIODevice & );
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#endif
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};
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#endif // TQIODEVICE_H
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