for (int i = 0; i < reps; i++) {
      for (int n = 0; n < chars.length; n++) {
        dummy ^= Ascii.isUpperCase(chars[n]);
      }
    }
    return dummy;
  }

  static String charSequenceToUpperCase(CharSequence chars) {
    char[] newChars = new char[chars.length()];
    for (int i = 0; i < newChars.length; i++) {
      newChars[i] = Ascii.toUpperCase(chars.charAt(i));
    }

        // + label
        System.arraycopy(label, 0, suffix, 0, label.length);
        // + 1 byte 0x00
        // + context
        System.arraycopy(context, 0, suffix, label.length + 1, context.length);
        // + 4 byte (== r bits) big endian encoding of L
        suffix[ suffix.length - 1 ] = (byte) 128;

   */
  public static float[] concat(float[]... arrays) {
    long length = 0;
    for (float[] array : arrays) {
      length += array.length;
    }
    float[] result = new float[checkNoOverflow(length)];
    int pos = 0;
    for (float[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

   */
  public static double[] concat(double[]... arrays) {
    long length = 0;
    for (double[] array : arrays) {
      length += array.length;
    }
    double[] result = new double[checkNoOverflow(length)];
    int pos = 0;
    for (double[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

   */
  public static float[] concat(float[]... arrays) {
    long length = 0;
    for (float[] array : arrays) {
      length += array.length;
    }
    float[] result = new float[checkNoOverflow(length)];
    int pos = 0;
    for (float[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

	k := len(b)
	numLetters := int64(len(d.b))
	for k > 0 && d.idx < d.length {
		w := copy(b[len(b)-k:], d.b[d.idx%numLetters:])
		k -= w
		d.idx += int64(w)
		n += w
	}
	if d.idx >= d.length {
		extraBytes := d.idx - d.length
		n -= int(extraBytes)
		if n < 0 {
			n = 0
		}
		err = io.EOF
	}
	return
}

func (d *DummyDataGen) Seek(offset int64, whence int) (int64, error) {

        }

        encode_in(buf);
        length = buf.getIndex() - start;

        if (ptype == 0) {
            buf.setIndex(alloc_hint_index);
            alloc_hint = length - alloc_hint_index;
            buf.enc_ndr_long(alloc_hint);
        }

        buf.setIndex(start);
        encode_header(buf);
        buf.setIndex(start + length);
    }
    public void decode(NdrBuffer buf) throws NdrException {

   */
  public static byte[] concat(byte[]... arrays) {
    long length = 0;
    for (byte[] array : arrays) {
      length += array.length;
    }
    byte[] result = new byte[checkNoOverflow(length)];
    int pos = 0;
    for (byte[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

    assertEquals(expected.length(), reader.skip(Long.MAX_VALUE));
    assertFullyRead(reader);

    // skip 5 and read the rest
    if (expected.length() > 5) {
      reader = new CharSequenceReader(charSequence);
      assertEquals(5, reader.skip(5));

      buf = new char[expected.length() - 5];
      assertEquals(buf.length, reader.read(buf, 0, buf.length));

        advance(l);
    }


    public int getLength() {
        return deferred.length;
    }
    public void setLength(int length) {
        deferred.length = length;
    }
    public void advance(int n) {
        index += n;
        if ((index - start) > deferred.length) {
            deferred.length = index - start;
        }
    }
    public int align(int boundary) {