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| 24 | <font color="#004faf">Main Classes</font></a>
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| 30 | <font color="#004faf">Functions</font></a>
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| 31 | </td>
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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>qiodevice.h</h1>
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| 33 |
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| 34 | <p>This is the verbatim text of the qiodevice.h include file. It is provided only for illustration; the copyright remains with Trolltech.
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| 35 | <hr>
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| 36 | <pre>
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| 37 | /****************************************************************************
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| 38 | ** $Id: qiodevice-h.html 2051 2007-02-21 10:04:20Z chehrlic $
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| 39 | **
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| 40 | ** Definition of QIODevice class
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| 41 | **
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| 42 | ** Created : 940913
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| 43 | **
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| 44 | ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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| 45 | **
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| 46 | ** This file is part of the tools module of the Qt GUI Toolkit.
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| 47 | **
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| 48 | ** This file may be distributed under the terms of the Q Public License
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| 49 | ** as defined by Trolltech ASA of Norway and appearing in the file
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| 50 | ** LICENSE.QPL included in the packaging of this file.
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| 51 | **
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| 52 | ** This file may be distributed and/or modified under the terms of the
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| 53 | ** GNU General Public License version 2 as published by the Free Software
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| 54 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 55 | ** packaging of this file.
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| 56 | **
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| 57 | ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
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| 58 | ** licenses may use this file in accordance with the Qt Commercial License
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| 59 | ** Agreement provided with the Software.
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| 60 | **
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| 61 | ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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| 62 | ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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| 63 | **
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| 64 | ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
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| 65 | ** information about Qt Commercial License Agreements.
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| 66 | ** See http://www.trolltech.com/qpl/ for QPL licensing information.
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| 67 | ** See http://www.trolltech.com/gpl/ for GPL licensing information.
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| 68 | **
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| 69 | ** Contact info@trolltech.com if any conditions of this licensing are
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| 70 | ** not clear to you.
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| 71 | **
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| 72 | **********************************************************************/
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| 73 |
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| 74 | #ifndef QIODEVICE_H
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| 75 | #define QIODEVICE_H
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| 76 |
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| 77 | #ifndef QT_H
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| 78 | #include "qglobal.h"
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| 79 | #include "qcstring.h"
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| 80 | #endif // QT_H
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| 81 |
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| 82 |
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| 83 | // IO device access types
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| 84 |
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| 85 | #define IO_Direct 0x0100 // direct access device
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| 86 | #define IO_Sequential 0x0200 // sequential access device
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| 87 | #define IO_Combined 0x0300 // combined direct/sequential
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| 88 | #define IO_TypeMask 0x0f00
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| 89 |
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| 90 | // IO handling modes
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| 91 |
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| 92 | #define IO_Raw 0x0040 // raw access (not buffered)
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| 93 | #define IO_Async 0x0080 // asynchronous mode
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| 94 |
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| 95 | // IO device open modes
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| 96 |
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| 97 | #define IO_ReadOnly 0x0001 // readable device
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| 98 | #define IO_WriteOnly 0x0002 // writable device
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| 99 | #define IO_ReadWrite 0x0003 // read+write device
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| 100 | #define IO_Append 0x0004 // append
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| 101 | #define IO_Truncate 0x0008 // truncate device
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| 102 | #define IO_Translate 0x0010 // translate CR+LF
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| 103 | #define IO_ModeMask 0x00ff
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| 104 |
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| 105 | // IO device state
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| 106 |
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| 107 | #define IO_Open 0x1000 // device is open
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| 108 | #define IO_StateMask 0xf000
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| 109 |
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| 110 | // IO device status
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| 111 |
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| 112 | #define IO_Ok 0
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| 113 | #define IO_ReadError 1 // read error
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| 114 | #define IO_WriteError 2 // write error
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| 115 | #define IO_FatalError 3 // fatal unrecoverable error
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| 116 | #define IO_ResourceError 4 // resource limitation
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| 117 | #define IO_OpenError 5 // cannot open device
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| 118 | #define IO_ConnectError 5 // cannot connect to device
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| 119 | #define IO_AbortError 6 // abort error
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| 120 | #define IO_TimeOutError 7 // time out
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| 121 | #define IO_UnspecifiedError 8 // unspecified error
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| 122 |
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| 123 |
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| 124 | class Q_EXPORT QIODevice
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| 125 | {
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| 126 | public:
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| 127 | #if defined(QT_ABI_QT4)
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| 128 | typedef Q_LLONG Offset;
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| 129 | #else
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| 130 | typedef Q_ULONG Offset;
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| 131 | #endif
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| 132 |
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| 133 | QIODevice();
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| 134 | virtual ~QIODevice();
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| 135 |
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| 136 | int flags() const { return ioMode; }
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| 137 | int mode() const { return ioMode & IO_ModeMask; }
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| 138 | int state() const { return ioMode & IO_StateMask; }
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| 139 |
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| 140 | bool isDirectAccess() const { return ((ioMode & IO_Direct) == IO_Direct); }
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| 141 | bool isSequentialAccess() const { return ((ioMode & IO_Sequential) == IO_Sequential); }
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| 142 | bool isCombinedAccess() const { return ((ioMode & IO_Combined) == IO_Combined); }
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| 143 | bool isBuffered() const { return ((ioMode & IO_Raw) != IO_Raw); }
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| 144 | bool isRaw() const { return ((ioMode & IO_Raw) == IO_Raw); }
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| 145 | bool isSynchronous() const { return ((ioMode & IO_Async) != IO_Async); }
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| 146 | bool isAsynchronous() const { return ((ioMode & IO_Async) == IO_Async); }
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| 147 | bool isTranslated() const { return ((ioMode & IO_Translate) == IO_Translate); }
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| 148 | bool isReadable() const { return ((ioMode & IO_ReadOnly) == IO_ReadOnly); }
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| 149 | bool isWritable() const { return ((ioMode & IO_WriteOnly) == IO_WriteOnly); }
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| 150 | bool isReadWrite() const { return ((ioMode & IO_ReadWrite) == IO_ReadWrite); }
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| 151 | bool isInactive() const { return state() == 0; }
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| 152 | bool isOpen() const { return state() == IO_Open; }
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| 153 |
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| 154 | int status() const { return ioSt; }
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| 155 | void resetStatus() { ioSt = IO_Ok; }
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| 156 |
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| 157 | virtual bool open( int mode ) = 0;
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| 158 | virtual void close() = 0;
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| 159 | virtual void flush() = 0;
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| 160 |
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| 161 | virtual Offset size() const = 0;
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| 162 | virtual Offset at() const;
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| 163 | virtual bool at( Offset );
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| 164 | virtual bool atEnd() const;
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| 165 | bool reset() { return at(0); }
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| 166 |
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| 167 | virtual Q_LONG readBlock( char *data, Q_ULONG maxlen ) = 0;
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| 168 | virtual Q_LONG writeBlock( const char *data, Q_ULONG len ) = 0;
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| 169 | virtual Q_LONG readLine( char *data, Q_ULONG maxlen );
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| 170 | Q_LONG writeBlock( const QByteArray& data );
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| 171 | virtual QByteArray readAll();
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| 172 |
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| 173 | virtual int getch() = 0;
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| 174 | virtual int putch( int ) = 0;
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| 175 | virtual int ungetch( int ) = 0;
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| 176 |
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| 177 | protected:
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| 178 | void setFlags( int f ) { ioMode = f; }
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| 179 | void setType( int );
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| 180 | void setMode( int );
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| 181 | void setState( int );
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| 182 | void setStatus( int );
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| 183 | Offset ioIndex;
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| 184 |
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| 185 | private:
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| 186 | int ioMode;
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| 187 | int ioSt;
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| 188 |
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| 189 | private: // Disabled copy constructor and operator=
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| 190 | #if defined(Q_DISABLE_COPY)
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| 191 | QIODevice( const QIODevice & );
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| 192 | QIODevice &operator=( const QIODevice & );
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| 193 | #endif
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| 194 | };
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| 195 |
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| 196 |
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| 197 | #endif // QIODEVICE_H
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| 198 | </pre>
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| 199 | <!-- eof -->
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| 200 | <p><address><hr><div align=center>
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| 201 | <table width=100% cellspacing=0 border=0><tr>
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| 202 | <td>Copyright © 2007
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| 203 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 204 | <td align=right><div align=right>Qt 3.3.8</div>
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| 205 | </table></div></address></body>
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| 206 | </html>
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