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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Qt Toolkit - qiodevice.h include file</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: white; color: black; }--></style></head><body bgcolor="#ffffff"><table width="100%"><tr><td><a href="index.html"><img width="100" height="100" src="qtlogo.png"alt="Home" border="0"><img width="100"height="100" src="face.png" alt="Home" border="0"></a><td valign="top"><div align="right"><img src="dochead.png" width="472" height="27"><br><a href="classes.html"><b>Classes</b></a>- <a href="annotated.html">Annotated</a>- <a href="hierarchy.html">Tree</a>- <a href="functions.html">Functions</a>- <a href="index.html">Home</a>- <a href="topicals.html"><b>Structure</b> <font face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular" align="center" size=32>Qte</font></a></div></table><h1 align=center>qiodevice.h</h1><br clear="all">This is the verbatim text of the qiodevice.h include file. It isprovided only for illustration; the copyrightremains with Trolltech.<hr><pre>/****************************************************************************** $Id: qt/src/tools/qiodevice.h 2.3.8 edited 2004-05-12 $**** Definition of QIODevice class**** Created : 940913**** Copyright (C) 1992-2000 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 errorclass Q_EXPORT <a href="qiodevice.html">QIODevice</a> // IO device class{public: 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 uint size() const = 0; virtual int at() const; virtual bool at( int ); virtual bool atEnd() const; bool reset() { return at(0); } virtual int readBlock( char *data, uint maxlen ) = 0; virtual int writeBlock( const char *data, uint len ) = 0; virtual int readLine( char *data, uint maxlen ); int writeBlock( const QByteArray& data ); 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 ); int 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</pre><p><address><hr><div align="center"><table width="100%" cellspacing="0" border="0"><tr><td>Copyright ⌨️ 快捷键说明
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