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FGETWC(3) Linux Programmer's Manual FGETWC(3)
fgetwc, getwc - read a wide character from a FILE stream
wint_t fgetwc(FILE *stream);
wint_t getwc(FILE *stream);
The 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 fer-
ror(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).
The fgetwc function returns the next wide-character from the stream, or WEOF.
Apart from the usual ones, there is
EILSEQ The data obtained from the input stream does not form a valid character.
ISO/ANSI C, UNIX98
The 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 con-
vert it to a wide character.
fputwc(3), fgetws(3), ungetwc(3), unlocked_stdio(3)
GNU 1999-07-25 FGETWC(3)
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