Originální popis anglicky:
fgetwc, getwc - read a wide character from a FILE stream
Návod, kniha: Linux Programmer's Manual
#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
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).
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 convert it to a wide character.
fgetws(3),
fputwc(3),
ungetwc(3),
unlocked_stdio(3)
