cleanup: more Coverity silencing

Mostly irrelevant std::move() stuff of copy-on-write Qt objects,
a few real bugs, a timestamp_t downconversion and some codingsyle
adaptation.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

backend-shared/exportfuncs.cpp

@@ -350,8 +350,8 @@ std::vector<const dive_site *> getDiveSitesToExport(bool selectedOnly)
 	return res;
 }
 
-QFuture<int> exportUsingStyleSheet(QString filename, bool doExport, int units,
+QFuture<int> exportUsingStyleSheet(const QString &filename, bool doExport, int units,
-	QString stylesheet, bool anonymize)
+	const QString &stylesheet, bool anonymize)
 {
 	return QtConcurrent::run(export_dives_xslt, filename.toUtf8(), doExport, units, stylesheet.toUtf8(), anonymize);
 }

backend-shared/exportfuncs.h

@@ -17,7 +17,7 @@ void exportProfile(QString filename, bool selected_only, ExportCallback &cb);
 void export_TeX(const char *filename, bool selected_only, bool plain, ExportCallback &cb);
 void export_depths(const char *filename, bool selected_only);
 std::vector<const dive_site *> getDiveSitesToExport(bool selectedOnly);
-QFuture<int> exportUsingStyleSheet(QString filename, bool doExport, int units, QString stylesheet, bool anonymize);
+QFuture<int> exportUsingStyleSheet(const QString &filename, bool doExport, int units, const QString &stylesheet, bool anonymize);
 
 // prepareDivesForUploadDiveLog
 // prepareDivesForUploadDiveShare

commands/command_pictures.cpp

@@ -113,7 +113,7 @@ static std::vector<PictureListForDeletion> addPictures(std::vector<PictureListFo
 		if (!toRemove.filenames.empty())
 			res.push_back(toRemove);
 		invalidate_dive_cache(list.d);
-		emit diveListNotifier.picturesAdded(list.d, picsForSignal);
+		emit diveListNotifier.picturesAdded(list.d, std::move(picsForSignal));
 	}
 	picturesToAdd.clear();
 	return res;

core/configuredivecomputer.cpp

@@ -530,7 +530,7 @@ void ConfigureDiveComputer::setState(ConfigureDiveComputer::states newState)
 void ConfigureDiveComputer::setError(QString err)
 {
 	lastError = err;
-	emit error(err);
+	emit error(std::move(err));
 }
 
 void ConfigureDiveComputer::readThreadFinished()

core/device.cpp

@@ -81,7 +81,7 @@ static int addDC(std::vector<device> &dcs, const std::string &m, const std::stri
 		return it - dcs.begin();
 	} else {
 		dev.deviceId = calculate_string_hash(s.c_str());
-		dcs.insert(it, dev);
+		it = dcs.insert(it, dev);
 		return it - dcs.begin();
 	}
 }

core/fulltext.cpp

@@ -275,7 +275,7 @@ FullTextResult FullText::find(const FullTextQuery &q, StringFilterMode mode) con
 				[&res2] (dive *d) { return std::find(res2.begin(), res2.end(), d) == res2.end(); }), res.end());
 	}
 
-	return { res };
+	return { std::move(res) };
 }
 
 FullTextQuery &FullTextQuery::operator=(const QString &s)

core/imagedownloader.cpp

@@ -42,11 +42,11 @@ void ImageDownloader::saveImage(QNetworkReply *reply)
 	QString filename = reply->request().attribute(QNetworkRequest::User).toString();
 
 	if (reply->error() != QNetworkReply::NoError) {
-		emit failed(filename);
+		emit failed(std::move(filename));
 	} else {
 		QByteArray imageData = reply->readAll();
 		if (imageData.isEmpty()) {
-			emit failed(filename);
+			emit failed(std::move(filename));
 		} else {
 			QString path = QStandardPaths::standardLocations(QStandardPaths::CacheLocation).first();
 			QDir dir(path);
@@ -63,7 +63,7 @@ void ImageDownloader::saveImage(QNetworkReply *reply)
 				imageFile.close();
 				learnPictureFilename(filename, imageFile.fileName());
 			}
-			emit loaded(filename);
+			emit loaded(std::move(filename));
 		}
 	}
 
@@ -353,7 +353,7 @@ Thumbnailer::Thumbnail Thumbnailer::addUnknownThumbnailToCache(const QString &pi
 void Thumbnailer::frameExtracted(QString filename, QImage thumbnail, duration_t duration, duration_t offset)
 {
 	if (thumbnail.isNull()) {
-		frameExtractionFailed(filename, duration);
+		frameExtractionFailed(std::move(filename), duration);
 		return;
 	} else {
 		int size = maxThumbnailSize();

core/parse-gpx.cpp

@@ -8,7 +8,7 @@
 // Find the coordinates at the time specified in coords.start_dive
 // by searching the gpx file "fileName". Here is a typical trkpt element in GPX:
 // <trkpt lat="-26.84" lon="32.88"><ele>-53.7</ele><time>2017-08-06T04:56:42Z</time></trkpt>
-int getCoordsFromGPXFile(struct dive_coords *coords, QString fileName)
+int getCoordsFromGPXFile(struct dive_coords *coords, const QString &fileName)
 {
 	struct tm tm1;
 	time_t trkpt_time = 0;

core/parse-gpx.h

@@ -15,6 +15,6 @@ struct dive_coords {         // This structure holds important information after
 	int64_t timeZone_offset;      // UTC international time zone offset of dive site
 };
 
-int getCoordsFromGPXFile(dive_coords *coords, QString fileName);
+int getCoordsFromGPXFile(dive_coords *coords, const QString &fileName);
 
 #endif

core/qthelper.cpp

@@ -777,8 +777,8 @@ int parseDurationToSeconds(const QString &text)
 			seconds = numOnly.right(numOnly.length() - minutes.length() - 1);
 		}
 	} else {
-		hours = "0";
+		hours = QStringLiteral("0");
-		minutes = numOnly;
+		minutes = std::move(numOnly);
 	}
 	secs = lrint(hours.toDouble() * 3600 + minutes.toDouble() * 60 + seconds.toDouble());
 	return secs;

core/videoframeextractor.cpp

@@ -112,7 +112,7 @@ void VideoFrameExtractor::processItem(QString originalFilename, QString filename
 		return fail(originalFilename, duration, true);
 	}
 
-	emit extracted(originalFilename, img, duration, position);
+	emit extracted(originalFilename, std::move(img), duration, position);
 	QMutexLocker l(&lock);
 	workingOn.remove(originalFilename);
 }

desktop-widgets/divelistview.cpp

@@ -938,11 +938,12 @@ int DiveListView::lastImageTimeOffset()
 	return offset;
 }
 
-void DiveListView::updateLastImageTimeOffset(const int offset)
+void DiveListView::updateLastImageTimeOffset(timestamp_t offset)
 {
 	QSettings s;
 	s.beginGroup("MainWindow");
-	s.setValue("LastImageTimeOffset", offset);
+	// Can't create a QVariant from int64_t, for whatever reason.
+	s.setValue("LastImageTimeOffset", static_cast<long long>(offset));
 }
 
 void DiveListView::mouseDoubleClickEvent(QMouseEvent*)

desktop-widgets/divelistview.h

@@ -73,7 +73,7 @@ private:
 	void restoreExpandedRows(const std::vector<int> &);
 	int lastVisibleColumn();
 	void selectTrip(dive_trip *trip);
-	void updateLastImageTimeOffset(int offset);
+	void updateLastImageTimeOffset(timestamp_t offset);
 	int lastImageTimeOffset();
 	void addToTrip(int delta);
 	void matchImagesToDives(const QStringList &fileNames);

desktop-widgets/divelogimportdialog.cpp

@@ -326,7 +326,7 @@ void ColumnNameResult::setColumnValues(QList<QStringList> columns)
 	endInsertColumns();
 
 	beginInsertRows(QModelIndex(), 0, columns.count()-1);
-	columnValues = columns;
+	columnValues = std::move(columns);
 	endInsertRows();
 }
 
@@ -799,10 +799,11 @@ void DiveLogImportDialog::loadFileContents(int value, whatChanged triggeredBy)
 	}
 
 	if (rows > 0)
-		resultModel->setColumnValues(fileColumns);
+		resultModel->setColumnValues(std::move(fileColumns));
-	for (int i = 0; i < headers.count(); i++)
+	for (int i = 0; i < headers.count(); i++) {
 		if (!headers.at(i).isEmpty())
 			resultModel->setData(resultModel->index(0, i),headers.at(i),Qt::EditRole);
+	}
 }
 
 void DiveLogImportDialog::setup_csv_params(QStringList r, xml_params &params)

desktop-widgets/divesiteimportdialog.cpp

@@ -13,7 +13,7 @@
 // Caller keeps ownership of "imported". The contents of "imported" will be consumed on execution of the dialog.
 // On return, it will be empty.
 DivesiteImportDialog::DivesiteImportDialog(struct dive_site_table &imported, QString source, QWidget *parent) : QDialog(parent),
-	importedSource(source)
+	importedSource(std::move(source))
 {
 	QShortcut *close = new QShortcut(QKeySequence(Qt::CTRL | Qt::Key_W), this);
 	QShortcut *quit = new QShortcut(QKeySequence(Qt::CTRL | Qt::Key_Q), this);

desktop-widgets/mainwindow.cpp

@@ -1354,9 +1354,8 @@ void MainWindow::on_actionImportDiveLog_triggered()
 			logFiles.append(fn);
 	}
 
-	if (logFiles.size()) {
+	if (logFiles.size())
 		importFiles(logFiles);
-	}
 
 	if (csvFiles.size()) {
 		DiveLogImportDialog diveLogImport(std::move(csvFiles), this);
@@ -1553,9 +1552,8 @@ void MainWindow::hideProgressBar()
 	}
 }
 
-void MainWindow::divesChanged(const QVector<dive *> &dives, DiveField field)
+void MainWindow::divesChanged(const QVector<dive *> &dives, DiveField)
 {
-	Q_UNUSED(field)
 	for (struct dive *d: dives) {
 		qDebug() << "dive #" << d->number << "changed, cache is" << (dive_cache_is_valid(d) ? "valid" : "invalidated");
 		// a brute force way to deal with that would of course be to call

desktop-widgets/tab-widgets/TabDiveInformation.cpp

@@ -155,7 +155,7 @@ void TabDiveInformation::updateProfile()
 	ui->diveTimeText->setText(get_dive_duration_string(currentDive->duration.seconds, tr("h"), tr("min"), tr("sec"),
 			" ", currentDive->dc.divemode == FREEDIVE));
 
-	ui->sacText->setText(currentDive->cylinders.nr > 0 && mean[0] && currentDive->dc.divemode != CCR ? SACs : QString());
+	ui->sacText->setText(currentDive->cylinders.nr > 0 && mean[0] && currentDive->dc.divemode != CCR ? std::move(SACs) : QString());
 
 	if (currentDive->surface_pressure.mbar == 0) {
 		ui->atmPressVal->clear();			// If no atm pressure for dive then clear text box

desktop-widgets/tab-widgets/TabDiveNotes.cpp

@@ -404,7 +404,7 @@ void TabDiveNotes::on_notes_editingFinished()
 		return;
 
 	QString html = ui.notes->toHtml();
-	QString notes = isHtml(html) ? html : ui.notes->toPlainText();
+	QString notes = isHtml(html) ? std::move(html) : ui.notes->toPlainText();
 
 	if (currentTrip)
 		Command::editTripNotes(currentTrip, notes);

qt-models/cylindermodel.cpp

@@ -15,6 +15,7 @@
 
 CylindersModel::CylindersModel(bool planner, QObject *parent) : CleanerTableModel(parent),
 	d(nullptr),
+	dcNr(-1),
 	inPlanner(planner),
 	numRows(0),
 	tempRow(-1),

qt-models/divepicturemodel.cpp

@@ -281,7 +281,7 @@ void DivePictureModel::updateThumbnail(QString filename, QImage thumbnail, durat
 			addDurationToThumbnail(thumbnail, duration);	// If we know the duration paint it on top of the thumbnail
 			pictures[i].length = duration;
 		}
-		pictures[i].image = thumbnail;
+		pictures[i].image = std::move(thumbnail);
 		emit dataChanged(createIndex(i, 0), createIndex(i, 1));
 	}
 }
@@ -295,7 +295,7 @@ void DivePictureModel::pictureOffsetChanged(dive *d, const QString filenameIn, o
 	auto to = std::find_if(from, pictures.end(), [d](const PictureEntry &e) { return e.d != d; });
 
 	// Find picture with the given filename
-	auto oldPos = std::find_if(from, to, [filename](const PictureEntry &e) { return e.filename == filename; });
+	auto oldPos = std::find_if(from, to, [&filename](const PictureEntry &e) { return e.filename == filename; });
 	if (oldPos == to)
 		return;
 

qt-models/diveplannermodel.cpp

@@ -1312,7 +1312,7 @@ void DivePlannerPointsModel::createPlan(bool replanCopy)
 			disclaimerBegin = disclaimer.left(disclaimerMid);
 			disclaimerEnd = disclaimer.mid(disclaimerMid + 2);
 		} else {
-			disclaimerBegin = disclaimer;
+			disclaimerBegin = std::move(disclaimer);
 		}
 		int disclaimerPositionStart = oldnotes.indexOf(disclaimerBegin);
 		if (disclaimerPositionStart >= 0) {

qt-models/divetripmodel.cpp

@@ -1386,7 +1386,7 @@ void DiveTripModelTree::divesSelectedSlot(const QVector<dive *> &divesIn, dive *
 	QVector<QModelIndex> indices;
 	indices.reserve(dives.count());
 
-	processByTrip(dives, [this, &indices] (dive_trip *trip, const QVector<dive *> &divesInTrip)
+	processByTrip(std::move(dives), [this, &indices] (dive_trip *trip, const QVector<dive *> &divesInTrip)
 		      { divesSelectedTrip(trip, divesInTrip, indices); });
 
 	emit divesSelected(indices, diveToIdx(currentDive), currentDC);

qt-models/maplocationmodel.cpp

@@ -22,14 +22,12 @@ static QString siteMapDisplayName(const char *sitename)
 	const char Separator = '/';
 	QString fullname(sitename);
 
-	if (!qPrefDisplay::map_short_names() ) {
+	if (!qPrefDisplay::map_short_names() )
 		return fullname;
-	}
 
 	QString name = fullname.section(Separator, -1).trimmed();
-	if (name.isEmpty()) {
+	if (name.isEmpty())
-		name = fullname;
+		name = std::move(fullname);
-	}
 	return name;
 }
 

stats/statsaxis.cpp

@@ -279,7 +279,7 @@ void ValueAxis::updateLabels()
 {
 	QLocale loc;
 	auto [minString, maxString] = getFirstLastLabel();
-	int numTicks = guessNumTicks({ minString, maxString});
+	int numTicks = guessNumTicks({ std::move(minString), std::move(maxString)});
 
 	// Use full decimal increments
 	double height = max - min;

stats/statsstate.cpp

@@ -537,7 +537,8 @@ void StatsState::featureChanged(int id, bool state)
 // Creates the new chart-type from the current chart-type and a list of possible chart types.
 // If the flag "varChanged" is true, the current chart-type will be changed if the
 // current chart-type is undesired.
-const ChartTypeDesc &newChartType(ChartType type, std::vector<std::pair<const ChartTypeDesc &, bool>> charts,
+static const ChartTypeDesc &newChartType(ChartType type,
+					 const std::vector<std::pair<const ChartTypeDesc &, bool>> &charts,
 					 bool varChanged)
 {
 	for (auto [desc, warn]: charts) {

stats/statsvariables.cpp

@@ -329,14 +329,14 @@ QString StatsVariable::nameWithUnit() const
 {
 	QString s = name();
 	QString symb = unitSymbol();
-	return symb.isEmpty() ? s : QStringLiteral("%1 [%2]").arg(s, symb);
+	return symb.isEmpty() ? std::move(s) : QStringLiteral("%1 [%2]").arg(s, symb);
 }
 
 QString StatsVariable::nameWithBinnerUnit(const StatsBinner &binner) const
 {
 	QString s = name();
 	QString symb = binner.unitSymbol();
-	return symb.isEmpty() ? s : QStringLiteral("%1 [%2]").arg(s, symb);
+	return symb.isEmpty() ? std::move(s) : QStringLiteral("%1 [%2]").arg(s, symb);
 }
 
 const StatsBinner *StatsVariable::getBinner(int idx) const
@@ -551,7 +551,7 @@ std::vector<StatsBinValue<T>> bin_convert(const StatsVariable &variable, const S
 		T v = func(dives);
 		if (is_invalid_value(v) && (res.empty() || !fill_empty))
 			continue;
-		res.push_back({ std::move(bin), v });
+		res.push_back({ std::move(bin), std::move(v) });
 	}
 	if (res.empty())
 		return res;

stats/statsview.cpp

@@ -892,7 +892,7 @@ void StatsView::plotValueChart(const std::vector<dive *> &dives,
 		if (res.isValid()) {
 			double height = res.get(valueAxisOperation);
 			QString value = QString("%L1").arg(height, 0, 'f', decimals);
-			std::vector<QString> label = std::vector<QString> { value };
+			std::vector<QString> label = std::vector<QString> { std::move(value) };
 			items.push_back({ pos - 0.5, pos + 0.5, height, label,
 					  categoryBinner->formatWithUnit(*bin), res });
 		}
@@ -1080,7 +1080,7 @@ HistogramAxis *StatsView::createHistogramAxis(const QString &name, const StatsBi
 		QString label = binner.formatLowerBound(*bin);
 		double lowerBound = binner.lowerBoundToFloat(*bin);
 		bool prefer = binner.preferBin(*bin);
-		labels.push_back({ label, lowerBound, prefer });
+		labels.push_back({ std::move(label), lowerBound, prefer });
 	}
 
 	const StatsBin &lastBin = *bins.back().bin;
@@ -1129,7 +1129,7 @@ void StatsView::plotHistogramCountChart(const std::vector<dive *> &dives,
 		double upperBound = categoryBinner->upperBoundToFloat(*bin);
 		std::vector<QString> label = makePercentageLabels((int)dives.size(), total, isHorizontal);
 
-		items.push_back({ lowerBound, upperBound, std::move(dives), label,
+		items.push_back({ lowerBound, upperBound, std::move(dives), std::move(label),
 				  categoryBinner->formatWithUnit(*bin), total });
 	}