checkNotNull(from);
    checkNotNull(to);
    char[] buf = new char[DEFAULT_BUF_SIZE];
    int nRead;
    long total = 0;
    while ((nRead = from.read(buf)) != -1) {
      to.append(buf, 0, nRead);
      total += nRead;
    }
    return total;
  }

  /**
   * Copies all characters between the {@link Reader} and {@link Writer} objects. Does not close or

      frameCallback.onReadMessage(messageFrameBuffer.readByteString())
    }
  }

  /** Read headers and process any control frames until we reach a non-control frame. */
  @Throws(IOException::class)
  private fun readUntilNonControlFrame() {
    while (!receivedCloseFrame) {
      readHeader()
      if (!isControlFrame) {
        break
      }
      readControlFrame()
    }
  }

  /**

 *       block indefinitely or fail if the source creates an infinite reader.
 *   <li><b>Non-destructive:</b> A <i>destructive</i> reader will consume or otherwise alter the
 *       source as they are read from it. A source that provides such readers will not be reusable,
 *       and operations that read from the stream (including {@link #length()}, in some

        b += 2 // We rewound two bytes and then added four.
        break
      } else {
        return null // Wrong delimiter.
      }
    }

    // Read a group, one to four hex digits.
    var value = 0
    groupOffset = i
    while (i < limit) {
      val hexDigit = input[i].parseHexDigit()
      if (hexDigit == -1) break
      value = (value shl 4) + hexDigit
      i++
    }

                removeWaiter(node);
                break long_wait_loop; // jump down to the busy wait loop
              }
            }
          }
          oldHead = waitersField; // re-read and loop.
        } while (oldHead != Waiter.TOMBSTONE);
      }
      // re-read valueField, if we get here then we must have observed a TOMBSTONE while trying to
      // add a waiter.

        for (int h = Hashing.smear(key.hashCode()); ; h++) {
          h &= mask;
          int previousKeyIndex = hashTable[h] & BYTE_MASK; // unsigned read
          if (previousKeyIndex == BYTE_MASK) { // -1 signed becomes 255 unsigned
            hashTable[h] = (byte) outKeyIndex;
            break;
          } else if (key.equals(alternatingKeysAndValues[previousKeyIndex])) {
            duplicateKey =
                new Builder.DuplicateKey(

      int off = (int) expectedSize - remaining;
      int read = in.read(bytes, off, remaining);
      if (read == -1) {
        // end of stream before reading expectedSize bytes
        // just return the bytes read so far
        return Arrays.copyOf(bytes, off);
      }
      remaining -= read;
    }

    // bytes is now full
    int b = in.read();
    if (b == -1) {
      return bytes;
    }

   *
   * @param file the file to read
   * @param processor the object to which the bytes of the file are passed.
   * @return the result of the byte processor
   * @throws IOException if an I/O error occurs
   * @deprecated Prefer {@code asByteSource(file).read(processor)}.
   */
  @Deprecated
  @InlineMe(
      replacement = "Files.asByteSource(file).read(processor)",
      imports = "com.google.common.io.Files")

            shift += 7
          } else {
            result += b shl shift // Last byte.
            break
          }
        }
        return result
      }

      /** Reads a potentially Huffman encoded byte string. */
      @Throws(IOException::class)
      fun readByteString(): ByteString {
        val firstByte = readByte()

        listeners.enqueue(TERMINATED_FROM_NEW_EVENT);
        break;
      case STARTING:
        listeners.enqueue(TERMINATED_FROM_STARTING_EVENT);
        break;
      case RUNNING:
        listeners.enqueue(TERMINATED_FROM_RUNNING_EVENT);
        break;
      case STOPPING:
        listeners.enqueue(TERMINATED_FROM_STOPPING_EVENT);
        break;
      case TERMINATED:
      case FAILED: