// string "Algorithm"
	o = append(o, 0x87, 0xa9, 0x41, 0x6c, 0x67, 0x6f, 0x72, 0x69, 0x74, 0x68, 0x6d)
	o = msgp.AppendString(o, z.Algorithm)
	// string "DataBlocks"
	o = append(o, 0xaa, 0x44, 0x61, 0x74, 0x61, 0x42, 0x6c, 0x6f, 0x63, 0x6b, 0x73)
	o = msgp.AppendInt(o, z.DataBlocks)
	// string "ParityBlocks"
	o = append(o, 0xac, 0x50, 0x61, 0x72, 0x69, 0x74, 0x79, 0x42, 0x6c, 0x6f, 0x63, 0x6b, 0x73)
	o = msgp.AppendInt(o, z.ParityBlocks)

              new byte[] {(byte) 0xcd, (byte) 0xab, (byte) 0x00, (byte) 0x00},
              0x0000abcd,
              null,
              "cdab0000"),
          new ExpectedHashCode(
              new byte[] {
                (byte) 0xef, (byte) 0xcd, (byte) 0xab, (byte) 0x00,
                (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
              },
              0x00abcdef,
              0x0000000000abcdefL,

              new byte[] {(byte) 0xcd, (byte) 0xab, (byte) 0x00, (byte) 0x00},
              0x0000abcd,
              null,
              "cdab0000"),
          new ExpectedHashCode(
              new byte[] {
                (byte) 0xef, (byte) 0xcd, (byte) 0xab, (byte) 0x00,
                (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
              },
              0x00abcdef,
              0x0000000000abcdefL,

		header: []byte{0x2a, 0x4d, 0x18},
		f:      formatZstd,
	},
	{
		// LZ4
		header: []byte{0x4, 0x22, 0x4d, 0x18},
		f:      formatLZ4,
	},
	{
		// Snappy/S2 stream
		header: []byte{0xff, 0x06, 0x00, 0x00},
		f:      formatS2,
	},
	{
		header: []byte{0x42, 0x5a, 'h'},
		f:      formatBZ2,
	},
}

type untarOptions struct {
	ignoreDirs bool
	ignoreErrs bool
	prefixAll  string
}

   * @return {@code true} if the argument is a 6to4 address
   */
  public static boolean is6to4Address(Inet6Address ip) {
    byte[] bytes = ip.getAddress();
    return (bytes[0] == (byte) 0x20) && (bytes[1] == (byte) 0x02);
  }

  /**
   * Returns the IPv4 address embedded in a 6to4 address.
   *
   * @param ip {@link Inet6Address} to be examined for embedded IPv4 in 6to4 address

   * @return {@code true} if the argument is a 6to4 address
   */
  public static boolean is6to4Address(Inet6Address ip) {
    byte[] bytes = ip.getAddress();
    return (bytes[0] == (byte) 0x20) && (bytes[1] == (byte) 0x02);
  }

  /**
   * Returns the IPv4 address embedded in a 6to4 address.
   *
   * @param ip {@link Inet6Address} to be examined for embedded IPv4 in 6to4 address

			Devminor: 0,
			Format:   FormatGNU,
		}, {
			Name:     "sparse-posix-0.0",
			Mode:     420,
			Uid:      1000,
			Gid:      1000,
			Size:     200,
			ModTime:  time.Unix(1392342187, 0),
			Typeflag: 0x30,
			Linkname: "",
			Uname:    "david",
			Gname:    "david",
			Devmajor: 0,
			Devminor: 0,
			PAXRecords: map[string]string{
				"GNU.sparse.size":      "200",
				"GNU.sparse.numblocks": "95",

  }

  public void testBase32InvalidDecodings() {
    // These contain bytes not in the decodabet.
    assertFailsToDecode(base32(), "A ", "Unrecognized character: 0x20");
    assertFailsToDecode(base32(), "Wf2!", "Unrecognized character: f");
    // This sentence just isn't base32() encoded.
    assertFailsToDecode(base32(), "let's not talk of love or chains!");

   */
  public abstract long asLong();

  /**
   * If this hashcode has enough bits, returns {@code asLong()}, otherwise returns a {@code long}
   * value with {@code asBytes()} as the least-significant bytes and {@code 0x00} as the remaining
   * most-significant bytes.
   *
   * @since 14.0 (since 11.0 as {@code Hashing.padToLong(HashCode)})
   */
  public abstract long padToLong();

  /**

      }

      // We can't use .clone() because of GWT.
      byte[] newDecodabet = Arrays.copyOf(decodabet, decodabet.length);
      for (int upper = 'A'; upper <= 'Z'; upper++) {
        int lower = upper | 0x20;
        byte decodeUpper = decodabet[upper];
        byte decodeLower = decodabet[lower];
        if (decodeUpper == -1) {
          newDecodabet[upper] = decodeLower;
        } else {
          checkState(