code: func stoi(s string) int64 {
  	ret, err := strconv.ParseUint(s, 32, 64)
  	if err != nil {
  		//TODO handle error?
  		return 0
  	}
  	return int64(ret - int64Adjust)
  }
docs: // stoi de-serializes int64 from a sortable string 13 chars long.