Function gio_sys::g_data_input_stream_read_upto

pub unsafe extern fn g_data_input_stream_read_upto(stream: *mut GDataInputStream,
                                                   stop_chars: *const c_char,
                                                   stop_chars_len: ssize_t,
                                                   length: *mut size_t,
                                                   cancellable: *mut GCancellable,
                                                   error: *mut *mut GError)
                                                   -> *mut c_char