pub unsafe extern "stdcall" fn mariadb_convert_string(
from: *const c_char,
from_len: *mut usize,
from_cs: *mut MARIADB_CHARSET_INFO,
to: *mut c_char,
to_len: *mut usize,
to_cs: *mut MARIADB_CHARSET_INFO,
errorcode: *mut c_int,
) -> usize