Function vswscanf 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn vswscanf(
    s: *const wchar_t,
    format: *const wchar_t,
    __valist: VaList<'_>,
) -> c_int

See https://pubs.opengroup.org/onlinepubs/9799919799/functions/vswscanf.html.