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Linux 2.6 - man page for fputwc (linux section 3)

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

NAME
       fputwc, putwc - 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(3) 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 nonlocking counterparts, see unlocked_stdio(3).

RETURN VALUE
       The  fputwc()  function returns wc if no error occurred, or WEOF to indicate an error.  In
       the event of an error, errno is set to indicate the cause.

ERRORS
       Apart from the usual ones, there is

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

CONFORMING TO
       C99, POSIX.1-2001.

NOTES
       The behavior of fputwc() depends on the LC_CTYPE category of the current locale.

       In the absence of additional information passed to the fopen(3) 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)

COLOPHON
       This page is part of release 3.55 of the Linux man-pages project.  A  description  of  the
       project,     and    information	  about    reporting	bugs,	 can	be    found    at
       http://www.kernel.org/doc/man-pages/.

GNU					    2013-04-19					FPUTWC(3)


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