noble (3) fputwc.3.gz

NAME

       fputwc, putwc - write a wide character to a FILE stream

LIBRARY

       Standard C library (libc, -lc)

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

       On success, fputwc() function returns wc.  Otherwise, WEOF is returned, and errno is set to indicate  the
       error.

ERRORS

       Apart from the usual ones, there is

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

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌──────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │Interface                                                                     │ Attribute     │ Value   │
       ├──────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │fputwc(), putwc()                                                             │ Thread safety │ MT-Safe │
       └──────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       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)