vwscanf.3s (2010 09)

vwscanf(3S) vwscanf(3S)

NAME

vwscanf( ), vfwscanf( ), vswscanf( ) - convert formatted wide-character input of a stdarg argument list

SYNOPSIS

#include <stdarg.h>

#include <stdio.h>

#include <wchar.h>

int vwscanf(const wchar_t *__restrict format, va_list ap);

int vfwscanf(FILE *__restrict stream, const wchar_t *__restrict format,

va_list ap);

int vswscanf(wchar_t *__restrict ws, const wchar_t *__restrict format,

va_list ap);

DESCRIPTION

The vwscanf(), vfwscanf(), and vswscanf()

functions are equivalent to the wscanf(),

fwscanf(), and swscanf() functions respectively, except that instead of being called with a variable

number of arguments, they are called with an argument list pointer ap of type va_list as deﬁned by

<stdarg.h>.

These functions do not invoke the

va_end macro. However, since these functions invoke the va_arg

macro, the value of ap after the return is indeterminate.

APPLICATION USAGE

Applications using these functions should call

va_end afterwards to clean up.

AUTHOR

vwscanf(), vfwscanf(), and vswscanf() were developed by HP.