function getStringFromCharCode(dataView, start, length) {
  var str = '';
  length += start;

  for (var i = start; i < length; i += 1) {
    str += fromCharCode(dataView.getUint8(i));
  }

  return str;
}
Get string from char code in data view.
@param {DataView} dataView - The data view for read.
@param {number} start - The start index.
@param {number} length - The read length.
@returns {string} The read result.