}
    },
    {
     "name": "0.0.0.0_9080",
     "active_state": {
      "version_info": "2023-06-20T09:07:41Z/3",
      "listener": {
       "@type": "type.googleapis.com/envoy.config.listener.v3.Listener",
       "name": "0.0.0.0_9080",
       "address": {
        "socket_address": {
         "address": "0.0.0.0",
         "port_value": 9080
        }
       },
       "filter_chains": [

 */
    public static final int ATTR_ARCHIVE    = 0x20;

    // extended file attribute encoding(others same as above)
    static final int ATTR_COMPRESSED       = 0x800;
    static final int ATTR_NORMAL           = 0x080;
    static final int ATTR_TEMPORARY        = 0x100;

    static final int ATTR_GET_MASK = 0x7FFF; /* orig 0x7fff */
    static final int ATTR_SET_MASK = 0x30A7; /* orig 0x0027 */

binary_digits  = binary_digit { [ "_" ] binary_digit } .
octal_digits   = octal_digit { [ "_" ] octal_digit } .
hex_digits     = hex_digit { [ "_" ] hex_digit } .
</pre>

<pre>
42
4_2
0600
0_600
0o600
0O600       // second character is capital letter 'O'
0xBadFace
0xBad_Face
0x_67_7a_2f_cc_40_c6
170141183460469231731687303715884105727
170_141183_460469_231731_687303_715884_105727