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VFWPRINTF(3P) POSIX Programmer's Manual VFWPRINTF(3P)
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.
vfwprintf, vswprintf, vwprintf — wide-character formatted output of a
stdarg argument list
#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);
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.
Refer to fwprintf(3p).
Refer to fwprintf(3p).
The following sections are informative.
None.
Applications using these functions should call va_end(ap) afterwards
to clean up.
None.
None.
Section 2.5, Standard I/O Streams, fwprintf(3p)
The Base Definitions volume of POSIX.1‐2008, stdarg.h(0p),
stdio.h(0p), wchar.h(0p)
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 .
IEEE/The Open Group 2013 VFWPRINTF(3P)
Pages that refer to this page: wchar.h(0p), vswprintf(3p), vwprintf(3p)