vfwscanf, vwscanf, vswscanf—scan and format argument list from wide character input #include <stdio.h>
#include <stdarg.h>
int vwscanf(const wchar_t *__restrict fmt, va_list list);
int vfwscanf(FILE *__restrict fp,
const wchar_t *__restrict fmt, va_list list);
int vswscanf(const wchar_t *__restrict str,
const wchar_t *__restrict fmt, va_list list);
int _vwscanf(struct _reent *reent, const wchar_t *fmt,
va_list list);
int _vfwscanf(struct _reent *reent, FILE *fp,
const wchar_t *fmt, va_list list);
int _vswscanf(struct _reent *reent, const wchar_t *str,
const wchar_t *fmt, va_list list);
Description
vwscanf, vfwscanf, and vswscanf are (respectively) variants
of wscanf, fwscanf, and swscanf. They differ only in
allowing their caller to pass the variable argument list as a
va_list object (initialized by va_start) rather than
directly accepting a variable number of arguments.
Returns
vwscanf returns the number of input fields successfully scanned,
converted, and stored; the return value does not include scanned
fields which were not stored.
If vwscanf attempts to read at end-of-file, the return value
is EOF.
If no fields were stored, the return value is 0.
The routines _vwscanf, _vfwscanf, and _vswscanf are
reentrant versions which take an additional first parameter which points
to the reentrancy structure.
Portability