fputwc

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.

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

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

CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, C99.

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 5.10 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.



GNU                                2017-09-15                          FPUTWC(3)