fputwc, putwc - write a wide character to a FILE stream
#include <stdio.h>
#include <wchar.h>
wint_t fputwc(wchar_t wc, FILE *stream);
wint_t putwc(wchar_t wc, FILE *stream);
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).
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.
Apart from the usual ones, there is
- EILSEQ
- Conversion of wc to the stream's encoding fails.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| fputwc (), putwc () |
Thread safety |
MT-Safe |
POSIX.1-2001, POSIX.1-2008, C99.
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.
fgetwc(3),
fputws(3),
unlocked_stdio(3)