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4 ** Definition of QIODevice class
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47 // IO device access types
49 #define IO_Direct 0x0100 // direct access device
50 #define IO_Sequential 0x0200 // sequential access device
51 #define IO_Combined 0x0300 // combined direct/sequential
52 #define IO_TypeMask 0x0f00
56 #define IO_Raw 0x0040 // raw access (not buffered)
57 #define IO_Async 0x0080 // asynchronous mode
59 // IO device open modes
61 #define IO_ReadOnly 0x0001 // readable device
62 #define IO_WriteOnly 0x0002 // writable device
63 #define IO_ReadWrite 0x0003 // read+write device
64 #define IO_Append 0x0004 // append
65 #define IO_Truncate 0x0008 // truncate device
66 #define IO_Translate 0x0010 // translate CR+LF
67 #define IO_ModeMask 0x00ff
71 #define IO_Open 0x1000 // device is open
72 #define IO_StateMask 0xf000
78 #define IO_ReadError 1 // read error
79 #define IO_WriteError 2 // write error
80 #define IO_FatalError 3 // fatal unrecoverable error
81 #define IO_ResourceError 4 // resource limitation
82 #define IO_OpenError 5 // cannot open device
83 #define IO_ConnectError 5 // cannot connect to device
84 #define IO_AbortError 6 // abort error
85 #define IO_TimeOutError 7 // time out
86 #define IO_UnspecifiedError 8 // unspecified error
88 class Q_EXPORT QIODevice // IO device class
94 int flags() const { return ioMode; }
95 int mode() const { return ioMode & IO_ModeMask; }
96 int state() const { return ioMode & IO_StateMask; }
98 bool isDirectAccess() const { return ((ioMode & IO_Direct) == IO_Direct); }
99 bool isSequentialAccess() const { return ((ioMode & IO_Sequential) == IO_Sequential); }
100 bool isCombinedAccess() const { return ((ioMode & IO_Combined) == IO_Combined); }
101 bool isBuffered() const { return ((ioMode & IO_Raw) != IO_Raw); }
102 bool isRaw() const { return ((ioMode & IO_Raw) == IO_Raw); }
103 bool isSynchronous() const { return ((ioMode & IO_Async) != IO_Async); }
104 bool isAsynchronous() const { return ((ioMode & IO_Async) == IO_Async); }
105 bool isTranslated() const { return ((ioMode & IO_Translate) == IO_Translate); }
106 bool isReadable() const { return ((ioMode & IO_ReadOnly) == IO_ReadOnly); }
107 bool isWritable() const { return ((ioMode & IO_WriteOnly) == IO_WriteOnly); }
108 bool isReadWrite() const { return ((ioMode & IO_ReadWrite) == IO_ReadWrite); }
109 bool isInactive() const { return state() == 0; }
110 bool isOpen() const { return state() == IO_Open; }
112 int status() const { return ioSt; }
113 void resetStatus() { ioSt = IO_Ok; }
115 virtual bool open( int mode ) = 0;
116 virtual void close() = 0;
117 virtual void flush() = 0;
119 virtual uint size() const = 0;
120 virtual int at() const;
121 virtual bool at( int );
122 virtual bool atEnd() const;
123 bool reset() { return at(0); }
125 virtual int readBlock( char *data, uint maxlen ) = 0;
126 virtual int writeBlock( const char *data, uint len ) = 0;
127 virtual int readLine( char *data, uint maxlen );
128 int writeBlock( const QByteArray& data );
129 QByteArray readAll();
131 virtual int getch() = 0;
132 virtual int putch( int ) = 0;
133 virtual int ungetch( int ) = 0;
136 void setFlags( int f ) { ioMode = f; }
139 void setState( int );
140 void setStatus( int );
147 private: // Disabled copy constructor and operator=
148 #if defined(Q_DISABLE_COPY)
149 QIODevice( const QIODevice & );
150 QIODevice &operator=( const QIODevice & );
155 #endif // QIODEVICE_H