* href="http://www.w3.org/TR/2008/REC-xml-20081126/#syntax">2.4</a> of the XML specification.
 *
 * @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;

 * escaping with {@link com.google.common.html.HtmlEscapers} or {@link
 * com.google.common.xml.XmlEscapers}.
 *
 * @author David Beaumont
 * @author Chris Povirk
 * @since 15.0
 */
@GwtCompatible
public final class UrlEscapers {
  private UrlEscapers() {}

  // For each xxxEscaper() method, please add links to external reference pages

   *
   * <p>This method always returns the same object. That object is serializable; deserializing it
   * results in the same object too.
   *
   * @since 15.0
   */
  public static DiscreteDomain<BigInteger> bigIntegers() {
    return BigIntegerDomain.INSTANCE;
  }

  private static final class BigIntegerDomain extends DiscreteDomain<BigInteger>

   *
   * <p>This method always returns the same object. That object is serializable; deserializing it
   * results in the same object too.
   *
   * @since 15.0
   */
  public static DiscreteDomain<BigInteger> bigIntegers() {
    return BigIntegerDomain.INSTANCE;
  }

  private static final class BigIntegerDomain extends DiscreteDomain<BigInteger>

   *
   * @since 15.0
   */
  public static HashFunction sipHash24() {
    return SipHashFunction.SIP_HASH_24;
  }

  /**
   * Returns a hash function implementing the <a href="https://131002.net/siphash/">64-bit
   * SipHash-2-4 algorithm</a> using the given seed.
   *
   * @since 15.0
   */
  public static HashFunction sipHash24(long k0, long k1) {

        buf[10] = 6; // parameterDisplacement low
        buf[11] = 0; // high
        buf[12] = 7; // dataCount low
        buf[13] = 0; // high
        buf[14] = 8; // dataOffset low
        buf[15] = 0; // high
        buf[16] = 9; // dataDisplacement low
        buf[17] = 0; // high
        buf[18] = 1; // setupCount (only one byte)

        // Call the method under test

      return state.openInputStream();
    }
  }

  /**
   * Returns a readable {@link ByteSource} view of the data that has been written to this stream.
   *
   * @since 15.0
   */
  public ByteSource asByteSource() {
    return byteSource;
  }

  /**
   * Calls {@link #close} if not already closed, and then resets this object back to its initial

        message[8] = 0x03;

        // LM Response (24 bytes at offset 64)
        message[12] = 24; // Length
        message[13] = 0;
        message[14] = 24; // Max Length
        message[15] = 0;
        message[16] = 64; // Offset
        message[17] = 0;
        message[18] = 0;
        message[19] = 0;

        // NT Response (24 bytes at offset 88)
        message[20] = 24; // Length

   *   <li>have the same bit size
   *   <li>have the same strategy
   *   <li>have equal funnels
   * </ul>
   *
   * @param that The Bloom filter to check for compatibility.
   * @since 15.0
   */
  public boolean isCompatible(BloomFilter<T> that) {
    checkNotNull(that);
    return this != that
        && this.numHashFunctions == that.numHashFunctions
        && this.bitSize() == that.bitSize()

   * the {@link Writer#nullWriter()} method returns a new instance whose methods throw after the
   * instance is {@link Writer#close() closed}.
   *
   * @since 15.0
   */
  public static Writer nullWriter() {
    return NullWriter.INSTANCE;
  }

  private static final class NullWriter extends Writer {

    private static final NullWriter INSTANCE = new NullWriter();