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Linux 2.6 - man page for getwc (linux section 3)

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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  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 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.

CONFORMING TO
       C99, POSIX.1-2001.

NOTES
       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 con-
       vert it to a wide character.

SEE ALSO
       fgetws(3), fputwc(3), ungetwc(3), unlocked_stdio(3)

COLOPHON
       This page is part of release 3.55 of the Linux man-pages project.  A  description  of  the
       project,     and    information	  about    reporting	bugs,	 can	be    found    at
       http://www.kernel.org/doc/man-pages/.

GNU					    2013-04-19					FGETWC(3)
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