0)
    ret += flush(this[kNativeDecoder]);
  return ret;
};

/* Everything below this line is undocumented legacy stuff. */
/**
 *
 * @param {string | Buffer | TypedArray | DataView} buf
 * @param {number} offset
 * @returns {string}
 */
StringDecoder.prototype.text = function text(buf, offset) {
  this[kNativeDecoder][kMissingBytes] = 0;
  this[kNativeDecoder][kBufferedBytes] = 0;
  return this.write(buf.slice(offset));
};

ObjectDefineProperties(StringDecoder.prototype, {
  lastChar: {
    configurable: true,
    enumerable: true,
    get() {
      return TypedArrayPrototypeSubarray(this[kNativeDecoder],
                                         kIncompleteCharactersStart,
                                         kIncompleteCharactersEnd);
    }
  },
  lastNeed: {
    configurable: true,
    enumerable: true,
    get() {
      return this[kNativeDecoder][kMissingBytes];
    }
  },
  lastTotal: {
    configurable: true,
    enumerable: true,
    get() {
      return this[kNativeDecoder][kBufferedBytes] +
             this[kNativeDecoder][kMissingBytes];
    }
  }
});

exports.StringDecoder = StringDecoder;