static new TreeMap<Long, S> ipToCountry_data;

static S ipToCountry(S ip) {
  long ipNum = ipToInt(trim(ip));
  synchronized(ipToCountry_data) {
    ipToCountry_init();
    Long key = ipToCountry_data.floorKey(ipNum);
    ret key == null ? null : ipToCountry_data.get(key);
  }
}

static void ipToCountry_init() {
  synchronized(ipToCountry_data) {
    if (nempty(ipToCountry_data)) ret;
    
    long start = 0;
    for (S s : linesFromReader(utf8bufferedReader(gzInputStream(loadLibrary(#1008743))))) {
      L<S> l = splitAtSpace(s);
      if (l(l) < 2) continue;
      long diff = parseLong(first(l));
      S country = intern(last(l));
      start += diff;
      ipToCountry_data.put(start, country);
    }
  }
}