Function sqlite3_sys::sqlite3_create_function16

pub unsafe extern fn sqlite3_create_function16(p: *mut sqlite3,
                                               p: *const c_void,
                                               n: c_int,
                                               n: c_int,
                                               p: *mut c_void,
                                               f: Option<sqlite3_create_function_callback1>,
                                               f: Option<sqlite3_create_function_callback1>,
                                               f: Option<sqlite3_create_function_callback2>)
                                               -> c_int