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 equivalent 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 Electrical 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.kernel.org/doc/man-pages/reporting_bugs.html .