docs: function parse_ShortXLUnicodeString(blob, length, opts) {
  	var cch = blob.read_shift(opts && opts.biff >= 12 ? 2 : 1);
  	var encoding = 'sbcs-cont';
  	var cp = current_codepage;
  	if(opts && opts.biff >= 8) current_codepage = 1200;
  	if(!opts || opts.biff == 8 ) {
  		var fHighByte = blob.read_shift(1);
  		if(fHighByte) { encoding = 'dbcs-cont'; }
  	} else if(opts.biff == 12) {
  		encoding = 'wstr';
  	}
  	if(opts.biff >= 2 && opts.biff <= 5) encoding = 'cpstr';
  	var o = cch ? blob.read_shift(cch, encoding) : "";
  	current_codepage = cp;
  	return o;
  }