0x6a,
      0x6b,
      0x6c,
      0x6d,
      0x6e,
      0x6f,
      0x70,
      0x71,
      0x72,
      0xfc,
      0x73,
      0xfd,
      0x1ffb,
      0x7fff0,
      0x1ffc,
      0x3ffc,
      0x22,
      0x7ffd,
      0x3,
      0x23,
      0x4,
      0x24,
      0x5,
      0x25,
      0x26,
      0x27,
      0x6,
      0x74,
      0x75,

   * larger header content is not lost.
   */
  @Test
  fun tooLargeToHPackIsStillEmitted() {
    bytesIn.writeByte(0x21) // Dynamic table size update (size = 1).
    bytesIn.writeByte(0x00) // Literal indexed
    bytesIn.writeByte(0x0a) // Literal name (len = 10)
    bytesIn.writeUtf8("custom-key")
    bytesIn.writeByte(0x0d) // Literal value (len = 13)
    bytesIn.writeUtf8("custom-header")
    hpackReader!!.readHeaders()

  const val FLAG_END_HEADERS = 0x4 // Used for headers and continuation.
  const val FLAG_END_PUSH_PROMISE = 0x4
  const val FLAG_PADDED = 0x8 // Used for headers and data.
  const val FLAG_PRIORITY = 0x20 // Used for headers.
  const val FLAG_COMPRESSED = 0x20 // Used for data.

  /** Lookup table for valid frame types. */
  private val FRAME_NAMES =
    arrayOf(
      "DATA",
      "HEADERS",
      "PRIORITY",
      "RST_STREAM",

 * don't want to perform `trimMargin()` at runtime.
 */
fun String.escapeDataString(): String =
  buildString {
    for (codePoint in ******@****.***ints()) {
      when (codePoint) {
        in 0..0x20,
        '"'.code,
        '$'.code,
        '\\'.code,
        '·'.code,
        127,
        -> append(String.format("\\u%04x", codePoint))

        else -> appendCodePoint(codePoint)
      }
    }

              // 01NNNNNN
              val index = readInt(b, PREFIX_6_BITS)
              readLiteralHeaderWithIncrementalIndexingIndexedName(index - 1)
            }
            b and 0x20 == 0x20 -> {
              // 001NNNNN
              maxDynamicTableByteCount = readInt(b, PREFIX_5_BITS)
              if (maxDynamicTableByteCount < 0 || maxDynamicTableByteCount > headerTableSizeSetting) {

    } else if (codePoint == '+'.code && plusIsSpace) {
      // Encode '+' as '%2B' since we permit ' ' to be encoded as either '+' or '%20'.
      writeUtf8(if (alreadyEncoded) "+" else "%2B")
    } else if (codePoint < 0x20 ||
      codePoint == 0x7f ||
      codePoint >= 0x80 &&
      !unicodeAllowed ||
      codePoint.toChar() in encodeSet ||
      codePoint == '%'.code &&

  FRAME_SIZE_ERROR(6),

  REFUSED_STREAM(7),

  CANCEL(8),

  COMPRESSION_ERROR(9),

  CONNECT_ERROR(0xa),

  ENHANCE_YOUR_CALM(0xb),

  INADEQUATE_SECURITY(0xc),

  HTTP_1_1_REQUIRED(0xd),
  ;

  companion object {
    fun fromHttp2(code: Int): ErrorCode? = values().find { it.httpCode == code }
  }

   * represent the length.
   */
  internal const val B1_MASK_LENGTH = 127

  internal const val OPCODE_CONTINUATION = 0x0
  internal const val OPCODE_TEXT = 0x1
  internal const val OPCODE_BINARY = 0x2

  internal const val OPCODE_CONTROL_CLOSE = 0x8
  internal const val OPCODE_CONTROL_PING = 0x9
  internal const val OPCODE_CONTROL_PONG = 0xa

  /**

    assertThat(Ints.toByteArray(0xFFEEDDCC))
        .isEqualTo(new byte[] {(byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC});
  }

  public void testFromByteArray() {
    assertThat(Ints.fromByteArray(new byte[] {0x12, 0x13, 0x14, 0x15, 0x33})).isEqualTo(0x12131415);
    assertThat(Ints.fromByteArray(new byte[] {(byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC}))
        .isEqualTo(0xFFEEDDCC);
  }

  public void testFromByteArrayFails() {

    val result = mutableListOf<Story>()
    var i = 0
    while (true) { // break after last test.
      val storyResourceName =
        String.format(
          "/hpack-test-case/%s/story_%02d.json",
          testFolderName,
          i,
        )
      val storyInputStream =
        HpackJsonUtil::class.java.getResourceAsStream(storyResourceName)
          ?: break
      try {