FPUTWC(3) Linux Programmers Manual FPUTWC(3)
fputwc, putwc - write a wide character to a FILE stream
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 fer
ror(stream) becomes true, it returns WEOF. If a wide-character conver
sion 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 non-locking counterparts, see unlocked_stdio(3).
The fputwc() function returns wc if no error occurred, or WEOF to indi
cate an error.
Apart from the usual ones, there is
EILSEQ Conversion of wc to the streams encoding fails.
The behavior of fputwc() depends on the LC_CTYPE category of the cur
In the absence of additional information passed to the fopen(3) call,
it is reasonable to expect that fputwc() will actually write the multi
byte sequence corresponding to the wide character wc.
fgetwc(3), fputws(3), unlocked_stdio(3)
This page is part of release 3.05 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 1999-07-25 FPUTWC(3)