WESTERN_DIGIT("0123456789"),
    ALL_DIGIT(CharMatcher.digit(), ALL_DIGITS),
    OPS_5("+-*/%"),
    HEX_16(CharMatcher.inRange('0', '9').or(CharMatcher.inRange('A', 'F')), "0123456789ABCDEF"),
    HEX_22(
        CharMatcher.inRange('0', '9')
            .or(CharMatcher.inRange('A', 'F'))
            .or(CharMatcher.inRange('a', 'f')),
        "0123456789ABCDEFabcdef"),
    GERMAN_59(

  }

  /** Helper to manually escape a 7-bit ascii character */
  private String escapeAscii(char c) {
    Preconditions.checkArgument(c < 128);
    String hex = "0123456789ABCDEF";
    return "%" + hex.charAt((c >> 4) & 0xf) + hex.charAt(c & 0xf);
  }

  // In some escapers spaces are escaped to '+'
  private static final char[] plusSign = {'+'};

  // Percent escapers output upper case hex digits (uri escapers require this).
  private static final char[] upperHexDigits = "0123456789ABCDEF".toCharArray();

  /** If true we should convert space to the {@code +} character. */
  private final boolean plusForSpace;

  /**

        PacDataInputStream pdis = createInputStream(data);
        assertEquals(0x12345678, pdis.readInt());
    }

    @Test
    public void testReadLong() throws IOException {
        // Little-endian 0x123456789ABCDEF0 -> 0xF0 0xDE 0xBC 0x9A 0x78 0x56 0x34 0x12
        byte[] data = new byte[] { (byte) 0xF0, (byte) 0xDE, (byte) 0xBC, (byte) 0x9A, 0x78, 0x56, 0x34, 0x12 };
        PacDataInputStream pdis = createInputStream(data);