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)