getwc()

Read a character from a stream

Synopsis:

#include <wchar.h> 

wint_t getwc( FILE * fp );

Library:

libc

Description:

The getwchar() function reads the next wide character from the stream specified by stdin. Note that getwc() is a macro.

Returns:

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

Errors:

EAGAIN: The O_NONBLOCK flag is set for fp and would have been blocked by this operation.
EBADF: The file descriptor for fp 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

Safety:
Cancellation point	Yes
Interrupt handler	No
Signal handler	No
Thread	Yes

Caveats:

Because it's a macro, getwc() may produce unexpected results for calls in the form of getwc( *fp++ ). Use them with care or use fgetwc() instead.