//     || byte1 == (byte) 0xF4 && byte2 > (byte) 0x8F)
            || (((byte1 << 28) + (byte2 - (byte) 0x90)) >> 30) != 0
            // Third byte trailing-byte test
            || bytes[index++] > (byte) 0xBF
            // Fourth byte trailing-byte test
            || bytes[index++] > (byte) 0xBF) {
          return false;
        }
      }
    }
  }

0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, b: []byte{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe}, }, { m: []byte{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, b: []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe}, fail: true, }, { m: []byte{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, b: []byte{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, fail: true, }, { m: []byte{0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, b: []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe}, fail:...

  fun sourceSeesBom() {
    val body = "efbbbf68656c6c6f".decodeHex().toResponseBody()
    val source = body.source()
    assertThat(source.readByte() and 0xff).isEqualTo(0xef)
    assertThat(source.readByte() and 0xff).isEqualTo(0xbb)
    assertThat(source.readByte() and 0xff).isEqualTo(0xbf)
    assertThat(source.readUtf8()).isEqualTo("hello")
  }

  @Test
  fun bytesEmpty() {
    val body = body("")

        "custom-header",
        "custom-baz",
        "custom-header",
      )

    // Set to only support 110 bytes (enough for 2 headers).
    bytesIn.writeByte(0x3F) // Dynamic table size update (size = 110).
    bytesIn.writeByte(0x4F)
    bytesIn.writeByte(0x40) // Literal indexed
    bytesIn.writeByte(0x0a) // Literal name (len = 10)
    bytesIn.writeUtf8("custom-foo")

	// map header, size 12
	// string "dependGlobalObjectAPI"
	o = append(o, 0x8c, 0xb5, 0x64, 0x65, 0x70, 0x65, 0x6e, 0x64, 0x47, 0x6c, 0x6f, 0x62, 0x61, 0x6c, 0x4f, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x41, 0x50, 0x49)
	o = msgp.AppendBool(o, z.dependGlobalObjectAPI)
	// string "dependGlobalAuthNPlugin"
	o = append(o, 0xb7, 0x64, 0x65, 0x70, 0x65, 0x6e, 0x64, 0x47, 0x6c, 0x6f, 0x62, 0x61, 0x6c, 0x41, 0x75, 0x74, 0x68, 0x4e, 0x50, 0x6c, 0x75, 0x67, 0x69, 0x6e)

	//TODO LDTRSB -0x75(R9), R13               // 2db99838
	//TODO LDTRSH 0xef(R3), LR                 // 7ef8ce78
	//TODO LDTRSH 0x96(R19), R24               // 786a8978
	//TODO LDTRSW 0x1e(LR), R5                 // c5eb81b8
	//TODO LDUR 0xbf(R13), R1                  // a1f14bb8
	//TODO LDUR -0x3c(R22), R3                 // c3425cf8
	//TODO LDURB -0xff(R17), R14               // 2e125038

     * @param b the byte array to check
     * @return true if the bytes represent UTF-8 BOM, false otherwise
     */
    private boolean isUtf8BomBytes(final byte[] b) {
        return b[0] == (byte) 0xEF && b[1] == (byte) 0xBB && b[2] == (byte) 0xBF;
    }

    /**
     * Sets whether to process Google on/off comment directives.
     *
     * @param useGoogleOffOn true to enable Google on/off processing, false to disable

0x7f, 0xfe, 0x3e, 0x43, 0xf2, 0xf8, 0xc4, 0x4, 0x91, 0xd9, 0xee, 0x2e, 0x1, 0x6, 0xc5, 0x1, 0x4b, 0x82, 0xa4, 0x54, 0x79, 0x70, 0x65, 0x1, 0xa5, 0x56, 0x32, 0x4f, 0x62, 0x6a, 0xde, 0x0, 0x11, 0xa2, 0x49, 0x44, 0xc4, 0x10, 0xe6, 0xb4, 0xa8, 0xe0, 0xc6, 0x3d, 0x40, 0x7a, 0x87, 0x61, 0xf2, 0x43, 0x41, 0xdf, 0xcb, 0x93, 0xa4, 0x44, 0x44, 0x69, 0x72, 0xc4, 0x10, 0xfd, 0x76, 0xe, 0x16, 0xfc, 0x17, 0x4d, 0x38, 0xbc, 0xac, 0x18, 0xde, 0x36, 0xae, 0xd7, 0x48, 0xa6, 0x45, 0x63, 0x41, 0x6c, 0x67, 0x6f, 0x1,...

	// string "TimeLastRefresh"
	o = append(o, 0xaf, 0x54, 0x69, 0x6d, 0x65, 0x4c, 0x61, 0x73, 0x74, 0x52, 0x65, 0x66, 0x72, 0x65, 0x73, 0x68)
	o = msgp.AppendInt64(o, z.TimeLastRefresh)
	// string "Source"
	o = append(o, 0xa6, 0x53, 0x6f, 0x75, 0x72, 0x63, 0x65)
	o = msgp.AppendString(o, z.Source)
	// string "Group"
	o = append(o, 0xa5, 0x47, 0x72, 0x6f, 0x75, 0x70)
	o = msgp.AppendBool(o, z.Group)
	// string "Owner"

 * fills, it is doubled.
 */
@Suppress("NAME_SHADOWING")
object Hpack {
  private const val PREFIX_4_BITS = 0x0f
  private const val PREFIX_5_BITS = 0x1f
  private const val PREFIX_6_BITS = 0x3f
  private const val PREFIX_7_BITS = 0x7f

  private const val SETTINGS_HEADER_TABLE_SIZE = 4_096

  /**
   * The decoder has ultimate control of the maximum size of the dynamic table but we can choose