redhat man page for getwc

FGETWC(3)						     Linux Programmer's Manual							 FGETWC(3)

NAME
       fgetwc, getwc - read a wide character from a FILE stream

SYNOPSIS
       #include <stdio.h>
       #include <wchar.h>

       wint_t fgetwc(FILE *stream);
       wint_t getwc(FILE *stream);

DESCRIPTION
       The  fgetwc  function  is the wide-character equivalent of the fgetc function. It reads a wide character from stream and returns it. If the
       end of stream is reached, or if ferror(stream) becomes true, it returns WEOF. If a wide character conversion error occurs, it sets errno to
       EILSEQ and returns WEOF.

       The  getwc  function  or  macro functions identically to fgetwc.  It may be implemented as a macro, and may evaluate its argument more than
       once. There is no reason ever to use it.

       For non-locking counterparts, see unlocked_stdio(3).

RETURN VALUE
       The fgetwc function returns the next wide-character from the stream, or WEOF.

ERRORS
       Apart from the usual ones, there is

       EILSEQ The data obtained from the input stream does not form a valid character.

CONFORMING TO
       ISO/ANSI C, UNIX98

NOTES
       The behaviour of fgetwc depends on the LC_CTYPE category of the current locale.

       In the absence of additional information passed to the fopen call, it is reasonable to expect that fgetwc will actually	read  a  multibyte
       sequence from the stream and then convert it to a wide character.

SEE ALSO
       fputwc(3), fgetws(3), ungetwc(3), unlocked_stdio(3)

GNU
								    1999-07-25								 FGETWC(3)