val buffer =
      Buffer()
        .writeByte(0b00000010)
        .writeByte(0b10001001)
        .writeByte(0b11111111)
        .writeByte(0b11111111)
        .writeByte(0b11111111)
        .writeByte(0b11111111)
        .writeByte(0b11111111)
        .writeByte(0b11111111)
        .writeByte(0b11111111)
        .writeByte(0b11111111)
        .writeByte(0b11111111)
        .writeByte(0b11111111)

        sink.writeUtf8(url.toString()).writeByte('\n'.code)
        sink.writeUtf8(requestMethod).writeByte('\n'.code)
        sink.writeDecimalLong(varyHeaders.size.toLong()).writeByte('\n'.code)
        for (i in 0 until varyHeaders.size) {
          sink
            .writeUtf8(varyHeaders.name(i))
            .writeUtf8(": ")
            .writeUtf8(varyHeaders.value(i))
            .writeByte('\n'.code)
        }

      writeUtf8(MAGIC).writeByte('\n'.code)
      writeUtf8(VERSION_1).writeByte('\n'.code)
      writeDecimalLong(appVersion.toLong()).writeByte('\n'.code)
      writeDecimalLong(valueCount.toLong()).writeByte('\n'.code)
      writeByte('\n'.code)

      for (entry in lruEntries.values) {
        if (entry.currentEditor != null) {
          writeUtf8(DIRTY).writeByte(' '.code)
          writeUtf8(entry.key)

    val expected =
      Buffer()
        .writeByte(0x40) // Literal header, new name.
        .writeByte(0x82) // String literal is Huffman encoded (len = 2).
        .writeByte(0x94) // 'foo' Huffman encoded.
        .writeByte(0xE7)
        .writeByte(3) // String literal not Huffman encoded (len = 3).
        .writeByte('b'.code)
        .writeByte('a'.code)
        .writeByte('r'.code)
        .readByteString()

  val result = Buffer()
  var i = 0
  while (i < address.size) {
    if (i == longestRunOffset) {
      result.writeByte(':'.code)
      i += longestRunLength
      if (i == 16) result.writeByte(':'.code)
    } else {
      if (i > 0) result.writeByte(':'.code)
      val group = address[i] and 0xff shl 8 or (address[i + 1] and 0xff)
      result.writeHexadecimalUnsignedLong(group.toLong())
      i += 2

		r.isFull = true
	}

	return n, err
}

// WriteByte writes one byte into buffer, and returns ErrIsFull if buffer is full.
func (r *RingBuffer) WriteByte(c byte) error {
	r.mu.Lock()
	defer r.mu.Unlock()
	if err := r.err; err != nil {
		if err == io.EOF {
			err = ErrWriteOnClosed
		}
		return err
	}
	err := r.writeByte(c)
	for err == ErrIsFull && r.block {
		r.readCond.Wait()

internal infix fun Int.and(mask: Long): Long = toLong() and mask

@Throws(IOException::class)
internal fun BufferedSink.writeMedium(medium: Int) {
  writeByte(medium.ushr(16) and 0xff)
  writeByte(medium.ushr(8) and 0xff)
  writeByte(medium and 0xff)
}

@Throws(IOException::class)
internal fun BufferedSource.readMedium(): Int =
  (
    readByte() and 0xff shl 16

	}
	// Buffer is now empty; reset.
	b.Reset()
	return n, nil
}

// WriteByte appends the byte c to the buffer, growing the buffer as needed.
// The returned error is always nil, but is included to match [bufio.Writer]'s
// WriteByte. If the buffer becomes too large, WriteByte will panic with
// [ErrTooLarge].
func (b *Buffer) WriteByte(c byte) error {
	b.lastRead = opInvalid
	m, ok := b.tryGrowByReslice(1)
	if !ok {

			write(v.Raw, v.Alias)
		}
	case []clause.Column:
		writer.WriteByte('(')
		for idx, d := range v {
			if idx > 0 {
				writer.WriteByte(',')
			}
			stmt.QuoteTo(writer, d)
		}
		writer.WriteByte(')')
	case clause.Expr:
		v.Build(stmt)
	case string:
		stmt.DB.Dialector.QuoteTo(writer, v)
	case []string:
		writer.WriteByte('(')
		for idx, d := range v {
			if idx > 0 {

			if err != nil {
				t.Fatalf("write failed: %v", err)
			}
			wroteBytes += n
			wrote.Write(buf[:n])
			debugln("WRITE 2\t", writeRng.Intn(len(buf)), wroteBytes)

			// WriteByte
			err = rb.WriteByte(buf[0])
			if err != nil {
				t.Fatalf("write failed: %v", err)
			}
			wroteBytes++
			wrote.Write(buf[:1])
			debugln("WRITE 3\t", 1, wroteBytes)

			// TryWrite