putwc(3) — Linux manual page


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

NAME         top

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

SYNOPSIS         top

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

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

DESCRIPTION         top

       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         top

       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         top

       Apart from the usual ones, there is

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

ATTRIBUTES         top

       For an explanation of the terms used in this section, see

       │Interface         Attribute     Value   │
       │fputwc(), putwc() │ Thread safety │ MT-Safe │

CONFORMING TO         top

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

NOTES         top

       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         top

       fgetwc(3), fputws(3), unlocked_stdio(3)

COLOPHON         top

       This page is part of release 5.08 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

GNU                              2017-09-15                        FPUTWC(3)

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