.\"	$OpenBSD: getwc.3,v 1.4 2010/09/10 18:38:19 jmc Exp $
.\"
.\"	$NetBSD: getwc.3,v 1.7 2003/09/08 17:54:32 wiz Exp $
.\"
.\" Copyright (c) 1990, 1991, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek and the American National Standards Committee X3,
.\" on Information Processing Systems.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
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.\"    notice, this list of conditions and the following disclaimer.
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.\" 3. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\"     @(#)getc.3	8.1 (Berkeley) 6/4/93
.\"
.Dd $Mdocdate: September 10 2010 $
.Dt GETWC 3
.Os
.Sh NAME
.Nm fgetwc ,
.Nm getwc ,
.Nm getwchar
.Nd get next wide character from input stream
.Sh SYNOPSIS
.In stdio.h
.In wchar.h
.Ft wint_t
.Fn fgetwc "FILE *stream"
.Ft wint_t
.Fn getwc "FILE *stream"
.Ft wint_t
.Fn getwchar
.Sh DESCRIPTION
The
.Fn fgetwc
function
obtains the next input wide character (if present) from the stream pointed at by
.Fa stream ,
or the next character pushed back on the stream via
.Xr ungetwc 3 .
.Pp
The
.Fn getwc
function
acts essentially identically to
.Fn fgetwc ,
but is a macro that expands in-line.
.Pp
The
.Fn getwchar
function
is equivalent to
.Fn getwc
with the argument stdin.
.Sh RETURN VALUES
If successful, these routines return the next wide character
from the
.Fa stream .
If the stream is at end-of-file or a read error occurs,
the routines return
.Dv WEOF .
The routines
.Xr feof 3
and
.Xr ferror 3
must be used to distinguish between end-of-file and error.
If an error occurs, the global variable
.Va errno
is set to indicate the error.
The end-of-file condition is remembered, even on a terminal, and all
subsequent attempts to read will return
.Dv WEOF
until the condition is cleared with
.Xr clearerr 3 .
.Sh SEE ALSO
.Xr ferror 3 ,
.Xr fopen 3 ,
.Xr fread 3 ,
.Xr putwc 3 ,
.Xr stdio 3 ,
.Xr ungetwc 3
.Sh STANDARDS
The
.Fn fgetwc ,
.Fn getwc
and
.Fn getwchar
functions
conform to
.St -isoC-99 .