fputwc(3) — Linux manual page

fputwc(3)               Library Functions Manual               fputwc(3)

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)

COLOPHON

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Linux man-pages 6.9.1          2024-05-02                      fputwc(3)

Pages that refer to this page: curs_add_wch(3x), fgetwc(3), fputws(3), puts(3), putwchar(3), wchar_t(3type), wint_t(3type), wprintf(3)

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