@JvmField
  val CONNECTION_PREFACE = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n".encodeUtf8()

  /** The initial max frame size, applied independently writing to, or reading from the peer. */
  const val INITIAL_MAX_FRAME_SIZE = 0x4000 // 16384

  const val TYPE_DATA = 0x0
  const val TYPE_HEADERS = 0x1
  const val TYPE_PRIORITY = 0x2
  const val TYPE_RST_STREAM = 0x3
  const val TYPE_SETTINGS = 0x4
  const val TYPE_PUSH_PROMISE = 0x5

                    <mxGeometry x="-60" y="-540" width="330" height="260" as="geometry"/>
                </mxCell>

	b.Run(" X00000|X00000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 1, 1, size, b) })
	b.Run(" 000000|XXXXXX ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 0, 6, size, b) })
	b.Run(" XXX000|XXX000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 3, 3, size, b) })
	b.Run(" XXXXXX|000000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 6, 0, size, b) })
}

func BenchmarkErasureDecode_16_40MB(b *testing.B) {

		{"06 k=v\n", "06 k=v\n", "", "", false},
		{"00006 k=v\n", "00006 k=v\n", "", "", false},
		{"000006 k=v\n", "000006 k=v\n", "", "", false},
		{"000000 k=v\n", "000000 k=v\n", "", "", false},
		{"0 k=v\n", "0 k=v\n", "", "", false},
		{"+0000005 x=\n", "+0000005 x=\n", "", "", false},
	}

	for _, v := range vectors {
		key, val, res, err := parsePAXRecord(v.in)

                    <mxGeometry x="-60" y="-540" width="330" height="260" as="geometry"/>
                </mxCell>

 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public final class CharStreams {

  // 2K chars (4K bytes)
  private static final int DEFAULT_BUF_SIZE = 0x800;

  /** Creates a new {@code CharBuffer} for buffering reads or writes. */
  static CharBuffer createBuffer() {
    return CharBuffer.allocate(DEFAULT_BUF_SIZE);
  }

  private CharStreams() {}

  /**

            dst[dstIndex++] = maxSetupCount;
            dst[dstIndex++] = (byte)0x00;           // Reserved1
            writeInt2( flags, dst, dstIndex );
            dstIndex += 2;
            writeInt4( timeout, dst, dstIndex );
            dstIndex += 4;
            dst[dstIndex++] = (byte)0x00;           // Reserved2
            dst[dstIndex++] = (byte)0x00;
        }
        writeInt2( parameterCount, dst, dstIndex );

        }

        writeInt2( subCommand & 0xFF, dst, dstIndex );
        dstIndex += 2;
        System.arraycopy( descr, 0, dst, dstIndex, descr.length );
        dstIndex += descr.length;
        writeInt2( 0x0001, dst, dstIndex );
        dstIndex += 2;
        writeInt2( maxDataCount, dst, dstIndex );
        dstIndex += 2;
        writeInt4( serverTypes, dst, dstIndex );
        dstIndex += 4;

        SMBUtil.writeInt2(getSubCommand() & 0xFF, dst, dstIndex);
        dstIndex += 2;
        System.arraycopy(descr, 0, dst, dstIndex, descr.length);
        dstIndex += descr.length;
        SMBUtil.writeInt2(0x0001, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeInt2(this.maxDataCount, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeInt4(this.serverTypes, dst, dstIndex);
        dstIndex += 4;

    assertEscaping(e, "%00", '\u0000'); // nul
    assertEscaping(e, "%7F", '\u007f'); // del
    assertEscaping(e, "%C2%80", '\u0080'); // xx-00010,x-000000
    assertEscaping(e, "%DF%BF", '\u07ff'); // xx-11111,x-111111
    assertEscaping(e, "%E0%A0%80", '\u0800'); // xxx-0000,x-100000,x-00,0000
    assertEscaping(e, "%EF%BF%BF", '\uffff'); // xxx-1111,x-111111,x-11,1111
    assertUnicodeEscaping(e, "%F0%90%80%80", '\uD800', '\uDC00');