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# Qt 3 Support Members for QIODevice

The following class members are part of the Qt 3 support layer. They are provided to help you port old code to Qt 4. We advise against using them in new code.

- QIODevice class reference

### Public Types

- typedef Offset
- typedef Status

### Public Functions

- Offset at () const
- bool at ( Offset offset )
- int flags () const
- int getch ()
- bool isAsynchronous () const
- bool isBuffered () const
- bool isCombinedAccess () const
- bool isDirectAccess () const
- bool isInactive () const
- bool isRaw () const
- bool isSequentialAccess () const
- bool isSynchronous () const
- bool isTranslated () const
- int mode () const
- int putch ( int ch )
- qint64 readBlock ( char * data, quint64 size )
- void resetStatus ()
- int state () const
- Status status () const
- int ungetch ( int ch )
- qint64 writeBlock ( const char * data, quint64 size )
- qint64 writeBlock ( const QByteArray & data )

- 8 public functions inherited from QObject

## Member Type Documentation

### typedef QIODevice::Offset

Use `qint64` instead.

### typedef QIODevice::Status

Use QIODevice::OpenMode instead, or see the documentation for specific devices.

## Member Function Documentation

### Offset QIODevice::at () const

Use pos() instead.

### bool QIODevice::at ( Offset offset )

This is an overloaded member function, provided for convenience.

Use seek(offset) instead.

### int QIODevice::flags () const

Use openMode() instead.

### int QIODevice::getch ()

Use getChar() instead.

### bool QIODevice::isAsynchronous () const

This functionality is no longer available. This function always returns true.

### bool QIODevice::isBuffered () const

Use !(openMode() & QIODevice::Unbuffered) instead.

### bool QIODevice::isCombinedAccess () const

Use openMode() instead.

### bool QIODevice::isDirectAccess () const

Use !isSequential() instead.

### bool QIODevice::isInactive () const

Use isOpen(), isReadable(), or isWritable() instead.

### bool QIODevice::isRaw () const

Use openMode() instead.

### bool QIODevice::isSequentialAccess () const

Use isSequential() instead.

### bool QIODevice::isSynchronous () const

This functionality is no longer available. This function always returns false.

### bool QIODevice::isTranslated () const

Use openMode() instead.

### int QIODevice::mode () const

Use openMode() instead.

### int QIODevice::putch ( int ch )

Use putChar(ch) instead.

### qint64 QIODevice::readBlock ( char * data, quint64 size )

Use read(data, size) instead.

### void QIODevice::resetStatus ()

For device specific error handling, please refer to the individual device documentation.

See also qobject_cast().

### int QIODevice::state () const

Use isOpen() instead.

### Status QIODevice::status () const

For device specific error handling, please refer to the individual device documentation.

See also qobject_cast().

### int QIODevice::ungetch ( int ch )

Use ungetChar(ch) instead.

### qint64 QIODevice::writeBlock ( const char * data, quint64 size )

Use write(data, size) instead.

### qint64 QIODevice::writeBlock ( const QByteArray & data )

This is an overloaded member function, provided for convenience.

Use write(data) instead.