redhat man page for putwc

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

NAME
       fputwc - write a wide character to a FILE stream

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

       wint_t fputwc(wchar_t wc, FILE *stream);
       wint_t putwc(wchar_t wc, FILE *stream);

DESCRIPTION
       The  fputwc  function  is the wide-character equivalent of the fputc function. It writes the wide character wc to stream. If ferror(stream)
       becomes true, it returns WEOF. If a wide character conversion error occurs, it sets errno to EILSEQ and returns WEOF.  Otherwise it returns
       wc.

       The  putwc  function  or  macro functions identically to fputwc.  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 fputwc function returns wc if no error occurred, or WEOF to indicate an error.

ERRORS
       Apart from the usual ones, there is

       EILSEQ Conversion of wc to the stream's encoding fails.

CONFORMING TO
       ISO/ANSI C, UNIX98

NOTES
       The behaviour of fputwc 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 fputwc will actually write the multibyte
       sequence corresponding to the wide character wc.

SEE ALSO
       fgetwc(3), fputws(3), unlocked_stdio(3)

GNU
								    1999-07-25								 FPUTWC(3)