scope ipToCountry2020.

sS #dataSnippetID = #1400400;

static Lock #lock = lock();

static File #dataDir() {
  ret javaxCachesDir("ipToCountry2020");
}

sS ipToCountry2020(S ip) null on exception {
  ret ipToCountry2020(ipToInt(ip));
}

sS ipToCountry2020(long ipNum) null on exception {
  {
    lock lock;
    if (directoryEmpty(dataDir()))
      unzipSnippet(dataSnippetID, dataDir());
  }
  S line = pairB(binarySearchForLineInTextFile(newFile(dataDir(), "IP2LOCATION-LITE-DB1.CSV"), s -> {
    long a = parseFirstLong(s), b = parseSecondLong(s);
    ifdef ipToCountry2020_debug
      printVars_str("ipToCountry2020: ", +a, +b, +ipNum);
    endifdef
    ret ipNum > b ? 1 : ipNum < a ? -1 : 0;
  }));
  ret get(tok_splitAtComma_unquote(line), 2);
}