fputwc, putwc - write a wide character to a FILE stream
The fputwc() function is the wide-character equivalent of the fputc(3) function. It writes the wide character
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
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
wc to the stream's encoding fails.
POSIX.1-2001, POSIX.1-2008, C99.
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