.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
.TH "VFWPRINTF" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
.\" vfwprintf 
.SH PROLOG
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
.SH NAME
vfwprintf, vswprintf, vwprintf \- wide-character formatted output of
a stdarg argument list
.SH SYNOPSIS
.LP
\fB#include <stdarg.h>
.br
#include <stdio.h>
.br
#include <wchar.h>
.br
.sp
int vfwprintf(FILE *restrict\fP \fIstream\fP\fB, const wchar_t *restrict\fP
\fIformat\fP\fB,
.br
\ \ \ \ \ \  va_list\fP \fIarg\fP\fB);
.br
int vswprintf(wchar_t *restrict\fP \fIws\fP\fB, size_t\fP \fIn\fP\fB,
.br
\ \ \ \ \ \  const wchar_t *restrict\fP \fIformat\fP\fB, va_list\fP
\fIarg\fP\fB);
.br
int vwprintf(const wchar_t *restrict\fP \fIformat\fP\fB, va_list\fP
\fIarg\fP\fB);
.br
\fP
.SH DESCRIPTION
.LP
The \fIvfwprintf\fP(), \fIvswprintf\fP(), and \fIvwprintf\fP() functions
shall be equivalent to \fIfwprintf\fP(), \fIswprintf\fP(), and \fIwprintf\fP()
respectively, except that instead of being called with a variable
number of
arguments, they are called with an argument list as defined by \fI<stdarg.h>\fP.
.LP
These functions shall not invoke the \fIva_end\fP macro. However,
as these functions do invoke the \fIva_arg\fP macro, the
value of \fIap\fP after the return is unspecified.
.SH RETURN VALUE
.LP
Refer to \fIfwprintf\fP().
.SH ERRORS
.LP
Refer to \fIfwprintf\fP().
.LP
\fIThe following sections are informative.\fP
.SH EXAMPLES
.LP
None.
.SH APPLICATION USAGE
.LP
Applications using these functions should call \fIva_end\fP(\fIap\fP)
afterwards to clean up.
.SH RATIONALE
.LP
None.
.SH FUTURE DIRECTIONS
.LP
None.
.SH SEE ALSO
.LP
\fIfwprintf\fP(), the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
\fI<stdarg.h>\fP, \fI<stdio.h>\fP, \fI<wchar.h>\fP
.SH COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .