fgetwc(3) -- Linux man page
NAMEfgetwc, getwc - read a wide character from a FILE stream
DESCRIPTIONThe fgetwc function is the wide-character equivalent of the fgetc function. It reads a wide character from stream and returns it. If the end of stream is reached, or if ferror(stream) becomes true, it returns WEOF. If a wide character conversion error occurs, it sets errno to EILSEQ and returns WEOF.
The getwc function or macro functions identically to fgetwc. 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).
RETURN VALUEThe fgetwc function returns the next wide-character from the stream, or WEOF.
ERRORSApart from the usual ones, there is
- The data obtained from the input stream does not form a valid character.
CONFORMING TOISO/ANSI C, UNIX98
NOTESThe behaviour of fgetwc depends on the LC_CTYPE category of the current locale.
In the absence of additional information passed to the fopen call, it is reasonable to expect that fgetwc will actually read a multibyte sequence from the stream and then convert it to a wide character.
SEE ALSOfputwc(3), fgetws(3), ungetwc(3), unlocked_stdio(3)