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fgetwc, getwc — read a wide character from a FILE stream
#include <stdio.h> #include <wchar.h>
wint_t
fgetwc( |
FILE *stream); |
wint_t
getwc( |
FILE *stream); |
The fgetwc() function is the
wide-character equivalent of the fgetc(3) 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 nonlocking counterparts, see unlocked_stdio(3).
The fgetwc() function
returns the next wide-character from the stream, or
WEOF. In the event of an error,
errno is set to indicate the
cause.
Apart from the usual ones, there is
The data obtained from the input stream does not form a valid character.
The behavior of fgetwc()
depends on the LC_CTYPE
category of the current locale.
In the absence of additional information passed to the
fopen(3) 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.