srecord VNStatData(

  S lastMonthTotal,

  S thisMonthTotal, S thisMonthEstimated,

  S yesterdayTotal,

  S todayTotal, S todayEstimated

) {}

static VNStatData parse_vnstat(S output) {

  LS lines = lines(output);

  new VNStatData data;

  int i = indexOfContaining(lines, "monthly");

  if (i >= 0) {

    i = indexOfContaining(lines, i, "---")+1;

    i = indexOfContaining(lines, i, "---")+1;

    LS lastMonth = splitAtVerticalBar(get(lines, i-3));

    LS thisMonth = splitAtVerticalBar(get(lines, i-2));

    LS estimated = splitAtVerticalBar(get(lines, i));

    data.lastMonthTotal = get(lastMonth, 2);

    data.thisMonthTotal = get(thisMonth, 2);

    data.thisMonthEstimated = get(estimated, 2);

  }

  i = indexOfContaining(lines, "daily");

  if (i >= 0) {

    i = indexOfContaining(lines, i, "---")+1;

    i = indexOfContaining(lines, i, "---")+1;

    LS yesterday = splitAtVerticalBar(get(lines, i-3));

    LS today = splitAtVerticalBar(get(lines, i-2));

    LS estimated = splitAtVerticalBar(get(lines, i));

    data.yesterdayTotal = get(yesterday, 2);

    data.todayTotal = get(today, 2);

    data.todayEstimated = get(estimated, 2);

  }

  ret data;

}