Gittern\Hydrator\TreeHydrator::readModeString PHP Метод

    protected function readModeString(StringReader $reader)
    {
        $mode_string = '';
        do {
            $char = $reader->read(1);
            if (is_numeric($char)) {
                $mode_string .= $char;
            } else {
                if ($char != " ") {
                    throw new TreeParseException(sprintf("Expected either 0-9 or space character at position %d, 0x%x found", $reader->getOffset() - 1, ord($char)));
                }
            }
        } while ($char != " ");
        return $mode_string;
    }