Manpage of FPUTWC
FPUTWCSection: Linux Programmer's Manual (3)
NAMEfputwc, putwc - write a wide character to a FILE stream
#include <wchar.h>wint_t fputwc(wchar_t wc, FILE *stream);wint_t putwc(wchar_t wc, FILE *stream);
DESCRIPTIONThe 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 VALUEThe fputwc() function returns wc if no error occurred, or WEOFto indicate an error. In the event of an error, errnois set to indicate the cause.
ERRORSApart from the usual ones, there is
- Conversion of wc to the stream's encoding fails.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
|fputwc(), putwc()||Thread safety||MT-Safe|
CONFORMING TOPOSIX.1-2001, POSIX.1-2008, C99.
NOTESThe behavior of fputwc() depends on the LC_CTYPEcategory 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 ALSOfgetwc(3), fputws(3), unlocked_stdio(3)
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