Method formatTimeString

src/util.cpp:297–341

}

QString Util::formatTimeString(quint64 totalNanoseconds, bool shortForm)
{
    if (totalNanoseconds < 1000) {
        return QString::number(totalNanoseconds) + QLatin1String("ns");
    }

    auto format = [](quint64 fragment, int precision) -> QString {
        return QString::number(fragment).rightJustified(precision, QLatin1Char('0'));
    };

    const auto microseconds = (totalNanoseconds / 1000) % 1000;
    if (totalNanoseconds < 1000000) {
        const auto nanoseconds = totalNanoseconds % 1000;
        if (shortForm) {
            return QString::number(microseconds) + QStringLiteral("µs");
        }
        return format(microseconds, 3) + QLatin1Char('.') + format(nanoseconds, 3) + QStringLiteral("µs");
    }

    const auto milliseconds = (totalNanoseconds / 1000000) % 1000;
    if (totalNanoseconds < 1000000000) {
        if (shortForm) {
            return QString::number(milliseconds) + QLatin1String("ms");
        }
        return format(milliseconds, 3) + QLatin1Char('.') + format(microseconds, 3) + QLatin1String("ms");
    }

    const auto totalSeconds = totalNanoseconds / 1000000000;
    const auto days = totalSeconds / 60 / 60 / 24;
    const auto hours = (totalSeconds / 60 / 60) % 24;
    const auto minutes = (totalSeconds / 60) % 60;
    const auto seconds = totalSeconds % 60;

    auto optional = [](quint64 fragment, const char* unit) -> QString {
        if (fragment > 0)
            return QString::number(fragment) + QLatin1String(unit) + QLatin1Char(' ');
        return {};
    };
    if (shortForm) {
        return optional(days, "d") + optional(hours, "h") + optional(minutes, "min") + QString::number(seconds)
            + QLatin1Char('s');
    }
    return optional(days, "d") + optional(hours, "h") + optional(minutes, "min") + format(seconds, 2) + QLatin1Char('.')
        + format(milliseconds, 3) + QLatin1Char('s');
}

QString Util::formatFrequency(quint64 occurrences, quint64 nanoseconds)
{