vwprintf(3C)
NAME
vfwprintf, vwprintf, vswprintf - wide-character formatted
output of a stdarg argument list
SYNOPSIS
#include <stdarg.h>
#include <stdio.h>
#include <wchar.h>
int vwprintf(const wchar_t *format, va_list arg);
int vfwprintf(FILE *stream, const wchar_t *format, va_list
arg);
int vswprintf(wchar_t *s, size_t n, const wchar_t *format,
va_list arg);
DESCRIPTION
The vwprintf(), vfwprintf(), and vswprintf() functions are
the same as wprintf(), fwprintf(), and swprintf() respec-
tively, except that instead of being called with a variable
number of arguments, they are called with an argument list
as defined by <stdarg.h>. See stdarg(3HEAD).
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(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| MT-Level | MT-Safe with exceptions |
|_____________________________|_____________________________|
SEE ALSO
fwprintf(3C), setlocale(3C), attributes(5), stdarg(3HEAD)
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.
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