ObjFW  Diff

	if (_stream == nil)
		@throw [OFNotOpenException exceptionWithObject: self];

	if (_atEndOfStream)
		return 0;

	if (length > UINT64_MAX)
		@throw [OFOutOfRangeException exception];

	if ((uint64_t)length > _toRead)
		length = (size_t)_toRead;

	ret = [_stream readIntoBuffer: buffer
			       length: length];

	if (ret == 0)