static private int accumField(int amt, int suffix, boolean always, int zeropad) {
        if (amt > 99 || (always && zeropad >= 3)) {
            return 3 + suffix;
        }
        if (amt > 9 || (always && zeropad >= 2)) {
            return 2 + suffix;
        }
        if (always || amt > 0) {
            return 1 + suffix;
        }
        return 0;
    }
@hide Field length that can hold 999 days of time
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/TimeUtils.java