// Copyright (C) 2016 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0 #include "timelineformattime.h" #include namespace Timeline { QString formatTime(qint64 timestamp, qint64 reference) { static const char *decimalUnits[] = {" ns", " \xb5s", " ms", " s"}; static const double second = 1e9; static const double minute = 60; static const double hour = 60; int round = 1; qint64 barrier = 1; for (uint i = 0, end = sizeof(decimalUnits) / sizeof(char *); i < end; ++i) { const double dividend = barrier; if (reference < barrier) { round += 3; barrier *= 1000; } else { barrier *= 10; if (reference < barrier) { round += 2; barrier *= 100; } else { barrier *= 10; if (reference < barrier) round += 1; barrier *= 10; } } if (timestamp < barrier) { return QString::number(timestamp / dividend, 'g', qMax(round, 3)) + QString::fromLatin1(decimalUnits[i]); } } double seconds = timestamp / second; if (seconds < minute) { return QString::number(seconds, 'g', qMax(round, 3)) + " s"; } else { int minutes = seconds / minute; seconds -= minutes * minute; if (minutes < hour) { return QString::fromLatin1("%1m %2s").arg(QString::number(minutes), QString::number(seconds, 'g', round)); } else { int hours = minutes / hour; minutes -= hours * hour; if (reference < barrier * minute) { return QString::fromLatin1("%1h %2m %3s").arg(QString::number(hours), QString::number(minutes), QString::number(seconds, 'g', round)); } else { return QString::fromLatin1("%1h %2m").arg(QString::number(hours), QString::number(minutes)); } } } } }