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OpenSolaris 2009.06 - man page for vwprintf (opensolaris section 3c)

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(5) 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(5), standards(5)
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. SunOS 5.11 1 Nov 2003 vfwprintf(3C)