trusty (3) putwc.3.gz

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 3.54 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/.