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VFWPRINTF(3P)              POSIX Programmer's Manual             VFWPRINTF(3P)
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.
NAME
       vfwprintf, vswprintf, vwprintf -- wide-character formatted output of  a
       stdarg argument list
SYNOPSIS
       #include <stdarg.h>
       #include <stdio.h>
       #include <wchar.h>
       int vfwprintf(FILE *restrict stream, const wchar_t *restrict format,
           va_list arg);
       int vswprintf(wchar_t *restrict ws, size_t n,
           const wchar_t *restrict format, va_list arg);
       int vwprintf(const wchar_t *restrict format, va_list arg);
DESCRIPTION
       The  functionality described on this reference page is aligned with the
       ISO C standard. Any conflict between the  requirements  described  here
       and  the  ISO C  standard is unintentional. This volume of POSIX.1-2008
       defers to the ISO C standard.
       The vfwprintf(), vswprintf(), and vwprintf() functions shall be equiva-
       lent to fwprintf(), swprintf(), and wprintf() respectively, except that
       instead of being called with a variable number of arguments,  they  are
       called with an argument list as defined by <stdarg.h>.
       These  functions  shall  not invoke the va_end macro. However, as these
       functions do invoke the va_arg macro, the value of ap after the  return
       is unspecified.
RETURN VALUE
       Refer to fwprintf().
ERRORS
       Refer to fwprintf().
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       Applications using these functions should call va_end(ap) afterwards to
       clean up.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       Section 2.5, Standard I/O Streams, fwprintf()
       The Base Definitions volume  of  POSIX.1-2008,  <stdarg.h>,  <stdio.h>,
       <wchar.h>
COPYRIGHT
       Portions  of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  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.unix.org/online.html .
       Any typographical or formatting errors that appear  in  this  page  are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors,  see  https://www.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                        VFWPRINTF(3P)