getwc()

Read a wide character from a stream

Synopsis:

#include <wchar.h> 

wint_t getwc( FILE * fp );

Arguments:

fp
The stream from which you want to read a wide character.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The getwc() function reads the next wide character from the specified stream.

Returns:

The next character from the stream, cast as (wint_t)(wchar_t), or WEOF if end-of-file has been reached or if an error occurs (errno is set).

Use feof() or ferror() to distinguish an end-of-file condition from an error.

Errors:

EAGAIN
The O_NONBLOCK flag is set for fp and would have been blocked by this operation.
EBADF
The fp stream isn't valid for reading.
EINTR
A signal terminated the read operation; no data was transferred.
EIO
Either a physical I/O error has occurred, or the process is in the background and is being ignored or blocked.
EOVERFLOW
Cannot read at or beyond the offset maximum for this stream.

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation pointYes
Interrupt handlerNo
Signal handlerNo
ThreadYes

Related links

  • errno

    Global error variable

  • feof()

    Test a stream's end-of-file flag

  • ferror()

    Test a stream's error flag

  • fgetwc()

    Read a wide character from a stream

  • fgetws()

    Read a string of wide characters from a stream

  • getc()

    Get the next character from a file

  • getwchar()

    Read a character from a stream

  • putwc()

    Write a wide character to a stream

  • putwchar()

    Write a wide character to a stdout