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fgetwc(3)
FGETWC(3) Linux Programmer's Manual FGETWC(3)
NAME
fgetwc, getwc - read a wide character from a FILE stream
SYNOPSIS
#include <stdio.h>
#include <wchar.h>
wint_t fgetwc(FILE *stream);
wint_t getwc(FILE *stream);
DESCRIPTION
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).
RETURN VALUE
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.
ERRORS
Apart from the usual ones, there is
EILSEQ The data obtained from the input stream does not form a valid
character.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
allbox; lbw17 lb lb l l l. Interface Attribute Value T{ fgetwc(),
getwc() T} Thread safety MT-Safe
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C99.
NOTES
The behavior of fgetwc() depends on the LC_CTYPE category of the cur‐
rent 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.
SEE ALSO
fgetws(3), fputwc(3), ungetwc(3), unlocked_stdio(3)
COLOPHON
This page is part of release 5.02 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2015-08-08 FGETWC(3)