VFWPRINTF(3C) Standard C Library Functions VFWPRINTF(3C)
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 s,
size_t n,
const wchar_t *restrict format,
va_list arg);
int vwprintf(
const wchar_t *restrict format,
va_list arg);
DESCRIPTION
The
vwprintf(),
vfwprintf(), and
vswprintf() functions are the same
as
wprintf(),
fwprintf(), and
swprintf() 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 do not invoke the
va_end() macro. However, as these
functions do invoke the
va_arg() macro, the value of
ap after the
return is indeterminate.
RETURN VALUES
Refer to
fwprintf(3C).
ERRORS
Refer to
fwprintf(3C).
USAGE
Applications using these functions should call
va_end(ap) afterwards
to clean up.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------------+
|Interface Stability | Standard |
+--------------------+-------------------------+
|MT-Level | MT-Safe with exceptions |
+--------------------+-------------------------+
SEE ALSO
fwprintf(3C),
setlocale(3C),
attributes(7),
standards(7)NOTES
The
vwprintf(),
vfwprintf(), and
vswprintf() functions can be used
safely in multithreaded applications, as long as
setlocale(3C) is not
being called to change the locale.
November 1, 2003 VFWPRINTF(3C)
