Function libsqlite3_sys::sqlite3_create_function16

pub unsafe extern fn sqlite3_create_function16(db: *mut sqlite3,
                                               zFunctionName: *const c_void,
                                               nArg: c_int,
                                               eTextRep: c_int,
                                               pApp: *mut c_void,
                                               xFunc: Option<unsafe extern fn(_: *mut sqlite3_context, _: c_int, _: *mut *mut sqlite3_value)>,
                                               xStep: Option<unsafe extern fn(_: *mut sqlite3_context, _: c_int, _: *mut *mut sqlite3_value)>,
                                               xFinal: Option<unsafe extern fn(_: *mut sqlite3_context)>)
                                               -> c_int