def stylify_code(code):
    """Stylify the C source code using astyle."""
    try:
        output = check_output(
            ['astyle', '--max-code-length=69', '--indent=spaces=2'],
            universal_newlines=True, input=code
        )
    except (OSError, CalledProcessError, TypeError):
        logging.debug(_('failed to stylify code'))
        return code
    return output
Stylify the C source code using astyle.