// 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 &&
      (!alreadyEncoded || strict && !input.isPercentEncoded(i, limit))
    ) {

      0xfa,
      0x16,
      0x17,
      0x18,
      0x0,
      0x1,
      0x2,
      0x19,
      0x1a,
      0x1b,
      0x1c,
      0x1d,
      0x1e,
      0x1f,
      0x5c,
      0xfb,
      0x7ffc,
      0x20,
      0xffb,
      0x3fc,
      0x1ffa,
      0x21,
      0x5d,
      0x5e,
      0x5f,
      0x60,
      0x61,
      0x62,
      0x63,
      0x64,

        new byte[] {
          0x01, (byte) 0xc0, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00,
          0x14, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x04, 0x00,
          0x00, 0x00, 0x00, 0x14,
          0x00, 0x00, 0x00, 0x18,
          0x28, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00,
          0x02, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00

    assertThat(Buffer().writeUtf8("Слава Україні!").isProbablyUtf8(16L)).isTrue()
    assertThat(Buffer().writeByte(0x80).isProbablyUtf8(16L)).isTrue()
    assertThat(Buffer().writeByte(0x00).isProbablyUtf8(16L)).isFalse()
    assertThat(Buffer().writeByte(0xc0).isProbablyUtf8(16L)).isFalse()
  }

  @Test fun doesNotConsumeBuffer() {
    val buffer = Buffer()
    buffer.writeUtf8("hello ".repeat(1024))

          char c3 = input.charAt(i + 3);
          if (c0 < 0x80 && c1 < 0x80 && c2 < 0x80 && c3 < 0x80) {
            update(4, c0 | (c1 << 8) | (c2 << 16) | (c3 << 24));
            i += 4;
          } else {
            break;
          }
        }

        for (; i < utf16Length; i++) {
          char c = input.charAt(i);
          if (c < 0x80) {
            update(1, c);
          } else if (c < 0x800) {

   * processed during inflation. If this happens, we need to either reject the message or discard
   * the unreachable data. We choose to discard it!
   *
   * In practice this could happen if the encoder doesn't strip the [0x00, 0x00, 0xff, 0xff] suffix
   * and that ends up repeated.
   *
   * https://github.com/square/okhttp/issues/8551
   */
  @Test
  fun `deflated data has too many bytes`() {
    val inflater = MessageInflater(true)

 *
 * @author Alex Matevossian
 * @author David Beaumont
 * @since 15.0
 */
@GwtCompatible
public class XmlEscapers {
  private XmlEscapers() {}

  private static final char MIN_ASCII_CONTROL_CHAR = 0x00;
  private static final char MAX_ASCII_CONTROL_CHAR = 0x1F;

  // For each xxxEscaper() method, please add links to external reference pages
  // that are considered authoritative for the behavior of that escaper.

  /**

              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,

    assertEquals(hash32, Hashing.combineOrdered(ImmutableList.of(hash32)));
    assertEquals(
        HashCode.fromBytes(new byte[] {(byte) 0x80, 0, 0, 0}),
        Hashing.combineOrdered(ImmutableList.of(hash32, hash32)));
    assertEquals(
        HashCode.fromBytes(new byte[] {(byte) 0xa0, 0, 0, 0}),
        Hashing.combineOrdered(ImmutableList.of(hash32, hash32, hash32)));
    assertFalse(

              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,