Move subsurface-core to core and qt-mobile to mobile-widgets

Having subsurface-core as a directory name really messes with
autocomplete and is obviously redundant. Simmilarly, qt-mobile caused an
autocomplete conflict and also was inconsistent with the desktop-widget
name for the directory containing the "other" UI.

And while cleaning up the resulting change in the path name for include
files, I decided to clean up those even more to make them consistent
overall.

This could have been handled in more commits, but since this requires a
make clean before the build, it seemed more sensible to do it all in one.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 1615 insertions, 0 deletions

diff --git a/core/qthelper.cpp b/core/qthelper.cpp
new file mode 100644
index 000000000..1d3951088
--- /dev/null
+++ b/core/qthelper.cpp
@@ -0,0 +1,1615 @@
+#include "qthelper.h"
+#include "helpers.h"
+#include "gettextfromc.h"
+#include "statistics.h"
+#include "membuffer.h"
+#include "subsurfacesysinfo.h"
+#include "version.h"
+#include "divecomputer.h"
+#include "time.h"
+#include "gettextfromc.h"
+#include <sys/time.h>
+#include "exif.h"
+#include "file.h"
+#include "prefs-macros.h"
+#include <QFile>
+#include <QRegExp>
+#include <QDir>
+#include <QDebug>
+#include <QSettings>
+#include <QStandardPaths>
+#include <QJsonDocument>
+#include <QNetworkReply>
+#include <QNetworkRequest>
+#include <QNetworkAccessManager>
+#include <QNetworkProxy>
+#include <QDateTime>
+#include <QImageReader>
+#include <QtConcurrent>
+#include <QFont>
+#include <QApplication>
+#include <QTextDocument>
+
+#include <libxslt/documents.h>
+
+const char *existing_filename;
+static QLocale loc;
+
+#define translate(_context, arg) trGettext(arg)
+static const QString DEGREE_SIGNS("dD" UTF8_DEGREE);
+
+QString weight_string(int weight_in_grams)
+{
+	QString str;
+	if (get_units()->weight == units::KG) {
+		int gr = weight_in_grams % 1000;
+		int kg = weight_in_grams / 1000;
+		if (kg >= 20.0)
+			str = QString("%1").arg(kg + (gr >= 500 ? 1 : 0));
+		else
+			str = QString("%1.%2").arg(kg).arg((unsigned)(gr + 50) / 100);
+	} else {
+		double lbs = grams_to_lbs(weight_in_grams);
+		if (lbs >= 40.0)
+			lbs = rint(lbs + 0.5);
+		else
+			lbs = rint(lbs + 0.05);
+		str = QString("%1").arg(lbs, 0, 'f', lbs >= 40.0 ? 0 : 1);
+	}
+	return (str);
+}
+
+QString distance_string(int distanceInMeters)
+{
+	QString str;
+	if(get_units()->length == units::METERS) {
+		if (distanceInMeters >= 1000)
+			str = QString(translate("gettextFromC", "%1km")).arg(distanceInMeters / 1000);
+		else
+			str = QString(translate("gettextFromC", "%1m")).arg(distanceInMeters);
+	} else {
+		double miles = m_to_mile(distanceInMeters);
+		if (miles >= 1.0)
+			str = QString(translate("gettextFromC", "%1mi")).arg((int)miles);
+		else
+			str = QString(translate("gettextFromC", "%1yd")).arg((int)(miles * 1760));
+	}
+	return str;
+}
+
+extern "C" const char *printGPSCoords(int lat, int lon)
+{
+	unsigned int latdeg, londeg;
+	unsigned int latmin, lonmin;
+	double latsec, lonsec;
+	QString lath, lonh, result;
+
+	if (!lat && !lon)
+		return strdup("");
+
+	if (prefs.coordinates_traditional) {
+		lath = lat >= 0 ? translate("gettextFromC", "N") : translate("gettextFromC", "S");
+		lonh = lon >= 0 ? translate("gettextFromC", "E") : translate("gettextFromC", "W");
+		lat = abs(lat);
+		lon = abs(lon);
+		latdeg = lat / 1000000U;
+		londeg = lon / 1000000U;
+		latmin = (lat % 1000000U) * 60U;
+		lonmin = (lon % 1000000U) * 60U;
+		latsec = (latmin % 1000000) * 60;
+		lonsec = (lonmin % 1000000) * 60;
+		result.sprintf("%u%s%02d\'%06.3f\"%s %u%s%02d\'%06.3f\"%s",
+			       latdeg, UTF8_DEGREE, latmin / 1000000, latsec / 1000000, lath.toUtf8().data(),
+			       londeg, UTF8_DEGREE, lonmin / 1000000, lonsec / 1000000, lonh.toUtf8().data());
+	} else {
+		result.sprintf("%f %f", (double) lat / 1000000.0, (double) lon / 1000000.0);
+	}
+	return strdup(result.toUtf8().data());
+}
+
+/**
+* Try to parse in a generic manner a coordinate.
+*/
+static bool parseCoord(const QString& txt, int& pos, const QString& positives,
+		       const QString& negatives, const QString& others,
+		       double& value)
+{
+	bool numberDefined = false, degreesDefined = false,
+		minutesDefined = false, secondsDefined = false;
+	double number = 0.0;
+	int posBeforeNumber = pos;
+	int sign = 0;
+	value = 0.0;
+	while (pos < txt.size()) {
+		if (txt[pos].isDigit()) {
+			if (numberDefined)
+				return false;
+			QRegExp numberRe("(\\d+(?:[\\.,]\\d+)?).*");
+			if (!numberRe.exactMatch(txt.mid(pos)))
+				return false;
+			number = numberRe.cap(1).toDouble();
+			numberDefined = true;
+			posBeforeNumber = pos;
+			pos += numberRe.cap(1).size() - 1;
+		} else if (positives.indexOf(txt[pos]) >= 0) {
+			if (sign != 0)
+				return false;
+			sign = 1;
+			if (degreesDefined || numberDefined) {
+				//sign after the degrees =>
+				//at the end of the coordinate
+				++pos;
+				break;
+			}
+		} else if (negatives.indexOf(txt[pos]) >= 0) {
+			if (sign != 0) {
+				if (others.indexOf(txt[pos]) >= 0)
+					//special case for the '-' sign => next coordinate
+					break;
+				return false;
+			}
+			sign = -1;
+			if (degreesDefined || numberDefined) {
+				//sign after the degrees =>
+				//at the end of the coordinate
+				++pos;
+				break;
+			}
+		} else if (others.indexOf(txt[pos]) >= 0) {
+			//we are at the next coordinate.
+			break;
+		} else if (DEGREE_SIGNS.indexOf(txt[pos]) >= 0 ||
+			   (txt[pos].isSpace() && !degreesDefined && numberDefined)) {
+			if (!numberDefined)
+				return false;
+			if (degreesDefined) {
+				//next coordinate => need to put back the number
+				pos = posBeforeNumber;
+				numberDefined = false;
+				break;
+			}
+			value += number;
+			numberDefined = false;
+			degreesDefined = true;
+		} else if (txt[pos] == '\'' || (txt[pos].isSpace() && !minutesDefined && numberDefined)) {
+			if (!numberDefined || minutesDefined)
+				return false;
+			value += number / 60.0;
+			numberDefined = false;
+			minutesDefined = true;
+		} else if (txt[pos] == '"' || (txt[pos].isSpace() && !secondsDefined && numberDefined)) {
+			if (!numberDefined || secondsDefined)
+				return false;
+			value += number / 3600.0;
+			numberDefined = false;
+			secondsDefined = true;
+		} else if ((numberDefined || minutesDefined || secondsDefined) &&
+			   (txt[pos] == ',' || txt[pos] == ';')) {
+			// next coordinate coming up
+			// eat the ',' and any subsequent white space
+			while (txt[++pos].isSpace())
+				/* nothing */ ;
+			break;
+		} else {
+			return false;
+		}
+		++pos;
+	}
+	if (!degreesDefined && numberDefined) {
+		value = number; //just a single number => degrees
+	} else if (!minutesDefined && numberDefined) {
+		value += number / 60.0;
+	} else if (!secondsDefined && numberDefined) {
+		value += number / 3600.0;
+	} else if (numberDefined) {
+		return false;
+	}
+	if (sign == -1) value *= -1.0;
+	return true;
+}
+
+/**
+* Parse special coordinate formats that cannot be handled by parseCoord.
+*/
+static bool parseSpecialCoords(const QString& txt, double& latitude, double& longitude) {
+	QRegExp xmlFormat("(-?\\d+(?:\\.\\d+)?),?\\s+(-?\\d+(?:\\.\\d+)?)");
+	if (xmlFormat.exactMatch(txt)) {
+		latitude = xmlFormat.cap(1).toDouble();
+		longitude = xmlFormat.cap(2).toDouble();
+		return true;
+	}
+	return false;
+}
+
+bool parseGpsText(const QString &gps_text, double *latitude, double *longitude)
+{
+	static const QString POS_LAT = QString("+N") + translate("gettextFromC", "N");
+	static const QString NEG_LAT = QString("-S") + translate("gettextFromC", "S");
+	static const QString POS_LON = QString("+E") + translate("gettextFromC", "E");
+	static const QString NEG_LON = QString("-W") + translate("gettextFromC", "W");
+
+	//remove the useless spaces (but keep the ones separating numbers)
+	static const QRegExp SPACE_CLEANER("\\s*([" + POS_LAT + NEG_LAT + POS_LON +
+		NEG_LON + DEGREE_SIGNS + "'\"\\s])\\s*");
+	const QString normalized = gps_text.trimmed().toUpper().replace(SPACE_CLEANER, "\\1");
+
+	if (normalized.isEmpty()) {
+		*latitude = 0.0;
+		*longitude = 0.0;
+		return true;
+	}
+	if (parseSpecialCoords(normalized, *latitude, *longitude))
+		return true;
+	int pos = 0;
+	return parseCoord(normalized, pos, POS_LAT, NEG_LAT, POS_LON + NEG_LON, *latitude) &&
+		parseCoord(normalized, pos, POS_LON, NEG_LON, "", *longitude) &&
+		pos == normalized.size();
+}
+
+#if 0 // we'll need something like this for the dive site management, eventually
+bool gpsHasChanged(struct dive *dive, struct dive *master, const QString &gps_text, bool *parsed_out)
+{
+	double latitude, longitude;
+	int latudeg, longudeg;
+	bool ignore;
+	bool *parsed = parsed_out ?: &ignore;
+	*parsed = true;
+
+	/* if we have a master and the dive's gps address is different from it,
+	 * don't change the dive */
+	if (master && (master->latitude.udeg != dive->latitude.udeg ||
+		       master->longitude.udeg != dive->longitude.udeg))
+		return false;
+
+	if (!(*parsed = parseGpsText(gps_text, &latitude, &longitude)))
+		return false;
+
+	latudeg = rint(1000000 * latitude);
+	longudeg = rint(1000000 * longitude);
+
+	/* if dive gps didn't change, nothing changed */
+	if (dive->latitude.udeg == latudeg && dive->longitude.udeg == longudeg)
+		return false;
+	/* ok, update the dive and mark things changed */
+	dive->latitude.udeg = latudeg;
+	dive->longitude.udeg = longudeg;
+	return true;
+}
+#endif
+
+QList<int> getDivesInTrip(dive_trip_t *trip)
+{
+	QList<int> ret;
+	int i;
+	struct dive *d;
+	for_each_dive (i, d) {
+		if (d->divetrip == trip) {
+			ret.push_back(get_divenr(d));
+		}
+	}
+	return ret;
+}
+
+// we need this to be uniq, but also make sure
+// it doesn't change during the life time of a Subsurface session
+// oh, and it has no meaning whatsoever - that's why we have the
+// silly initial number and increment by 3 :-)
+int dive_getUniqID(struct dive *d)
+{
+	static QSet<int> ids;
+	static int maxId = 83529;
+
+	int id = d->id;
+	if (id) {
+		if (!ids.contains(id)) {
+			qDebug() << "WTF - only I am allowed to create IDs";
+			ids.insert(id);
+		}
+		return id;
+	}
+	maxId += 3;
+	id = maxId;
+	Q_ASSERT(!ids.contains(id));
+	ids.insert(id);
+	return id;
+}
+
+
+static xmlDocPtr get_stylesheet_doc(const xmlChar *uri, xmlDictPtr, int, void *, xsltLoadType)
+{
+	QFile f(QLatin1String(":/xslt/") + (const char *)uri);
+	if (!f.open(QIODevice::ReadOnly)) {
+		if (verbose > 0) {
+			qDebug() << "cannot open stylesheet" << QLatin1String(":/xslt/") + (const char *)uri;
+			return NULL;
+		}
+	}
+	/* Load and parse the data */
+	QByteArray source = f.readAll();
+
+	xmlDocPtr doc = xmlParseMemory(source, source.size());
+	return doc;
+}
+
+extern "C" xsltStylesheetPtr get_stylesheet(const char *name)
+{
+	// this needs to be done only once, but doesn't hurt to run every time
+	xsltSetLoaderFunc(get_stylesheet_doc);
+
+	// get main document:
+	xmlDocPtr doc = get_stylesheet_doc((const xmlChar *)name, NULL, 0, NULL, XSLT_LOAD_START);
+	if (!doc)
+		return NULL;
+
+	//	xsltSetGenericErrorFunc(stderr, NULL);
+	xsltStylesheetPtr xslt = xsltParseStylesheetDoc(doc);
+	if (!xslt) {
+		xmlFreeDoc(doc);
+		return NULL;
+	}
+
+	return xslt;
+}
+
+
+extern "C" timestamp_t picture_get_timestamp(char *filename)
+{
+	EXIFInfo exif;
+	memblock mem;
+	int retval;
+
+	// filename might not be the actual filename, so let's go via the hash.
+	if (readfile(localFilePath(QString(filename)).toUtf8().data(), &mem) <= 0)
+		return 0;
+	retval = exif.parseFrom((const unsigned char *)mem.buffer, (unsigned)mem.size);
+	free(mem.buffer);
+	if (retval != PARSE_EXIF_SUCCESS)
+		return 0;
+	return exif.epoch();
+}
+
+extern "C" char *move_away(const char *old_path)
+{
+	if (verbose > 1)
+		qDebug() << "move away" << old_path;
+	QDir oldDir(old_path);
+	QDir newDir;
+	QString newPath;
+	int i = 0;
+	do {
+		newPath = QString(old_path) + QString(".%1").arg(++i);
+		newDir.setPath(newPath);
+	} while(newDir.exists());
+	if (verbose > 1)
+		qDebug() << "renaming to" << newPath;
+	if (!oldDir.rename(old_path, newPath)) {
+		if (verbose)
+			qDebug() << "rename of" << old_path << "to" << newPath << "failed";
+		// this next one we only try on Windows... if we are on a different platform
+		// we simply give up and return an empty string
+#ifdef WIN32
+		if (subsurface_dir_rename(old_path, qPrintable(newPath)) == 0)
+#endif
+			return strdup("");
+	}
+	return strdup(qPrintable(newPath));
+}
+
+extern "C" char *get_file_name(const char *fileName)
+{
+	QFileInfo fileInfo(fileName);
+	return strdup(fileInfo.fileName().toUtf8());
+}
+
+extern "C" void copy_image_and_overwrite(const char *cfileName, const char *path, const char *cnewName)
+{
+	QString fileName(cfileName);
+	QString newName(path);
+	newName += cnewName;
+	QFile file(newName);
+	if (file.exists())
+		file.remove();
+	if (!QFile::copy(fileName, newName))
+		qDebug() << "copy of" << fileName << "to" << newName << "failed";
+}
+
+extern "C" bool string_sequence_contains(const char *string_sequence, const char *text)
+{
+	if (same_string(text, "") || same_string(string_sequence, ""))
+		return false;
+
+	QString stringSequence(string_sequence);
+	QStringList strings = stringSequence.split(",", QString::SkipEmptyParts);
+	Q_FOREACH (const QString& string, strings) {
+		if (string.trimmed().compare(QString(text).trimmed(), Qt::CaseInsensitive) == 0)
+			return true;
+	}
+	return false;
+}
+
+static bool lessThan(const QPair<QString, int> &a, const QPair<QString, int> &b)
+{
+	return a.second < b.second;
+}
+
+void selectedDivesGasUsed(QVector<QPair<QString, int> > &gasUsedOrdered)
+{
+	int i, j;
+	struct dive *d;
+	QMap<QString, int> gasUsed;
+	for_each_dive (i, d) {
+		if (!d->selected)
+			continue;
+		volume_t diveGases[MAX_CYLINDERS] = {};
+		get_gas_used(d, diveGases);
+		for (j = 0; j < MAX_CYLINDERS; j++)
+			if (diveGases[j].mliter) {
+				QString gasName = gasname(&d->cylinder[j].gasmix);
+				gasUsed[gasName] += diveGases[j].mliter;
+			}
+	}
+	Q_FOREACH(const QString& gas, gasUsed.keys()) {
+		gasUsedOrdered.append(qMakePair(gas, gasUsed[gas]));
+	}
+	qSort(gasUsedOrdered.begin(), gasUsedOrdered.end(), lessThan);
+}
+
+QString getUserAgent()
+{
+	QString arch;
+	// fill in the system data - use ':' as separator
+	// replace all other ':' with ' ' so that this is easy to parse
+#ifdef SUBSURFACE_MOBILE
+	QString userAgent = QString("Subsurface-mobile:%1(%2):").arg(subsurface_mobile_version()).arg(subsurface_canonical_version());
+#else
+	QString userAgent = QString("Subsurface:%1:").arg(subsurface_canonical_version());
+#endif
+	userAgent.append(SubsurfaceSysInfo::prettyOsName().replace(':', ' ') + ":");
+	arch = SubsurfaceSysInfo::buildCpuArchitecture().replace(':', ' ');
+	userAgent.append(arch);
+	if (arch == "i386")
+		userAgent.append("/" + SubsurfaceSysInfo::currentCpuArchitecture());
+	userAgent.append(":" + uiLanguage(NULL));
+	return userAgent;
+
+}
+
+extern "C" const char *subsurface_user_agent()
+{
+	static QString uA = getUserAgent();
+
+	return strdup(qPrintable(uA));
+}
+
+QString uiLanguage(QLocale *callerLoc)
+{
+	QString shortDateFormat;
+	QString dateFormat;
+	QString timeFormat;
+	QSettings s;
+	QVariant v;
+	s.beginGroup("Language");
+
+	if (!s.value("UseSystemLanguage", true).toBool()) {
+		loc = QLocale(s.value("UiLanguage", QLocale().uiLanguages().first()).toString());
+	} else {
+		loc = QLocale(QLocale().uiLanguages().first());
+	}
+	QStringList languages = loc.uiLanguages();
+	QString uiLang;
+	if (languages[0].contains('-'))
+		uiLang = languages[0];
+	else if (languages.count() > 1 && languages[1].contains('-'))
+		uiLang = languages[1];
+	else if (languages.count() > 2 && languages[2].contains('-'))
+		uiLang = languages[2];
+	else
+		uiLang = languages[0];
+	GET_BOOL("time_format_override", time_format_override);
+	GET_BOOL("date_format_override", date_format_override);
+	GET_TXT("time_format", time_format);
+	GET_TXT("date_format", date_format);
+	GET_TXT("date_format_short", date_format_short);
+	s.endGroup();
+
+	// there's a stupid Qt bug on MacOS where uiLanguages doesn't give us the country info
+	if (!uiLang.contains('-') && uiLang != loc.bcp47Name()) {
+		QLocale loc2(loc.bcp47Name());
+		loc = loc2;
+		QStringList languages = loc2.uiLanguages();
+		if (languages[0].contains('-'))
+			uiLang = languages[0];
+		else if (languages.count() > 1 && languages[1].contains('-'))
+			uiLang = languages[1];
+		else if (languages.count() > 2 && languages[2].contains('-'))
+			uiLang = languages[2];
+	}
+	if (callerLoc)
+		*callerLoc = loc;
+
+	if (!prefs.date_format_override || same_string(prefs.date_format_short, "") || same_string(prefs.date_format, "")) {
+		// derive our standard date format from what the locale gives us
+		// the short format is fine
+		// the long format uses long weekday and month names, so replace those with the short ones
+		// for time we don't want the time zone designator and don't want leading zeroes on the hours
+		shortDateFormat = loc.dateFormat(QLocale::ShortFormat);
+		dateFormat = loc.dateFormat(QLocale::LongFormat);
+		dateFormat.replace("dddd,", "ddd").replace("dddd", "ddd").replace("MMMM", "MMM");
+		// special hack for Swedish as our switching from long weekday names to short weekday names
+		// messes things up there
+		dateFormat.replace("'en' 'den' d:'e'", " d");
+		if (!prefs.date_format_override || same_string(prefs.date_format, "")) {
+			free((void*)prefs.date_format);
+			prefs.date_format = strdup(qPrintable(dateFormat));
+		}
+		if (!prefs.date_format_override || same_string(prefs.date_format_short, "")) {
+			free((void*)prefs.date_format_short);
+			prefs.date_format_short = strdup(qPrintable(shortDateFormat));
+		}
+	}
+	if (!prefs.time_format_override || same_string(prefs.time_format, "")) {
+		timeFormat = loc.timeFormat();
+		timeFormat.replace("(t)", "").replace(" t", "").replace("t", "").replace("hh", "h").replace("HH", "H").replace("'kl'.", "");
+		timeFormat.replace(".ss", "").replace(":ss", "").replace("ss", "");
+		free((void*)prefs.time_format);
+		prefs.time_format = strdup(qPrintable(timeFormat));
+	}
+	return uiLang;
+}
+
+QLocale getLocale()
+{
+	return loc;
+}
+
+void set_filename(const char *filename, bool force)
+{
+	if (!force && existing_filename)
+		return;
+	free((void *)existing_filename);
+	if (filename)
+		existing_filename = strdup(filename);
+	else
+		existing_filename = NULL;
+}
+
+const QString get_dc_nickname(const char *model, uint32_t deviceid)
+{
+	const DiveComputerNode *existNode = dcList.getExact(model, deviceid);
+
+	if (existNode && !existNode->nickName.isEmpty())
+		return existNode->nickName;
+	else
+		return model;
+}
+
+QString get_depth_string(int mm, bool showunit, bool showdecimal)
+{
+	if (prefs.units.length == units::METERS) {
+		double meters = mm / 1000.0;
+		return QString("%1%2").arg(meters, 0, 'f', (showdecimal && meters < 20.0) ? 1 : 0).arg(showunit ? translate("gettextFromC", "m") : "");
+	} else {
+		double feet = mm_to_feet(mm);
+		return QString("%1%2").arg(feet, 0, 'f', 0).arg(showunit ? translate("gettextFromC", "ft") : "");
+	}
+}
+
+QString get_depth_string(depth_t depth, bool showunit, bool showdecimal)
+{
+	return get_depth_string(depth.mm, showunit, showdecimal);
+}
+
+QString get_depth_unit()
+{
+	if (prefs.units.length == units::METERS)
+		return QString("%1").arg(translate("gettextFromC", "m"));
+	else
+		return QString("%1").arg(translate("gettextFromC", "ft"));
+}
+
+QString get_weight_string(weight_t weight, bool showunit)
+{
+	QString str = weight_string(weight.grams);
+	if (get_units()->weight == units::KG) {
+		str = QString("%1%2").arg(str).arg(showunit ? translate("gettextFromC", "kg") : "");
+	} else {
+		str = QString("%1%2").arg(str).arg(showunit ? translate("gettextFromC", "lbs") : "");
+	}
+	return (str);
+}
+
+QString get_weight_unit()
+{
+	if (prefs.units.weight == units::KG)
+		return QString("%1").arg(translate("gettextFromC", "kg"));
+	else
+		return QString("%1").arg(translate("gettextFromC", "lbs"));
+}
+
+/* these methods retrieve used gas per cylinder */
+static unsigned start_pressure(cylinder_t *cyl)
+{
+	return cyl->start.mbar ?: cyl->sample_start.mbar;
+}
+
+static unsigned end_pressure(cylinder_t *cyl)
+{
+	return cyl->end.mbar ?: cyl->sample_end.mbar;
+}
+
+QString get_cylinder_used_gas_string(cylinder_t *cyl, bool showunit)
+{
+	int decimals;
+	const char *unit;
+	double gas_usage;
+	/* Get the cylinder gas use in mbar */
+	gas_usage = start_pressure(cyl) - end_pressure(cyl);
+	/* Can we turn it into a volume? */
+	if (cyl->type.size.mliter) {
+		gas_usage = bar_to_atm(gas_usage / 1000);
+		gas_usage *= cyl->type.size.mliter;
+		gas_usage = get_volume_units(gas_usage, &decimals, &unit);
+	} else {
+		gas_usage = get_pressure_units(gas_usage, &unit);
+		decimals = 0;
+	}
+	// translate("gettextFromC","%.*f %s"
+	return QString("%1 %2").arg(gas_usage, 0, 'f', decimals).arg(showunit ? unit : "");
+}
+
+QString get_temperature_string(temperature_t temp, bool showunit)
+{
+	if (temp.mkelvin == 0) {
+		return ""; //temperature not defined
+	} else if (prefs.units.temperature == units::CELSIUS) {
+		double celsius = mkelvin_to_C(temp.mkelvin);
+		return QString("%1%2%3").arg(celsius, 0, 'f', 1).arg(showunit ? (UTF8_DEGREE) : "").arg(showunit ? translate("gettextFromC", "C") : "");
+	} else {
+		double fahrenheit = mkelvin_to_F(temp.mkelvin);
+		return QString("%1%2%3").arg(fahrenheit, 0, 'f', 1).arg(showunit ? (UTF8_DEGREE) : "").arg(showunit ? translate("gettextFromC", "F") : "");
+	}
+}
+
+QString get_temp_unit()
+{
+	if (prefs.units.temperature == units::CELSIUS)
+		return QString(UTF8_DEGREE "C");
+	else
+		return QString(UTF8_DEGREE "F");
+}
+
+QString get_volume_string(volume_t volume, bool showunit)
+{
+	const char *unit;
+	int decimals;
+	double value = get_volume_units(volume.mliter, &decimals, &unit);
+	return QString("%1%2").arg(value, 0, 'f', decimals).arg(showunit ? unit : "");
+}
+
+QString get_volume_unit()
+{
+	const char *unit;
+	(void) get_volume_units(0, NULL, &unit);
+	return QString(unit);
+}
+
+QString get_pressure_string(pressure_t pressure, bool showunit)
+{
+	if (prefs.units.pressure == units::BAR) {
+		double bar = pressure.mbar / 1000.0;
+		return QString("%1%2").arg(bar, 0, 'f', 1).arg(showunit ? translate("gettextFromC", "bar") : "");
+	} else {
+		double psi = mbar_to_PSI(pressure.mbar);
+		return QString("%1%2").arg(psi, 0, 'f', 0).arg(showunit ? translate("gettextFromC", "psi") : "");
+	}
+}
+
+QString getSubsurfaceDataPath(QString folderToFind)
+{
+	QString execdir;
+	QDir folder;
+
+	// first check if we are running in the build dir, so the path that we
+	// are looking for is just a  subdirectory of the execution path;
+	// this also works on Windows as there we install the dirs
+	// under the application path
+	execdir = QCoreApplication::applicationDirPath();
+	folder = QDir(execdir.append(QDir::separator()).append(folderToFind));
+	if (folder.exists())
+		return folder.absolutePath();
+
+	// next check for the Linux typical $(prefix)/share/subsurface
+	execdir = QCoreApplication::applicationDirPath();
+	if (execdir.contains("bin")) {
+		folder = QDir(execdir.replace("bin", "share/subsurface/").append(folderToFind));
+		if (folder.exists())
+			return folder.absolutePath();
+	}
+	// then look for the usual locations on a Mac
+	execdir = QCoreApplication::applicationDirPath();
+	folder = QDir(execdir.append("/../Resources/share/").append(folderToFind));
+	if (folder.exists())
+		return folder.absolutePath();
+	execdir = QCoreApplication::applicationDirPath();
+	folder = QDir(execdir.append("/../Resources/").append(folderToFind));
+	if (folder.exists())
+		return folder.absolutePath();
+	return QString("");
+}
+
+static const char *printing_templates = "printing_templates";
+
+QString getPrintingTemplatePathUser()
+{
+	static QString path = QString();
+	if (path.isEmpty())
+		path = QString(system_default_directory()) + QDir::separator() + QString(printing_templates);
+	return path;
+}
+
+QString getPrintingTemplatePathBundle()
+{
+	static QString path = QString();
+	if (path.isEmpty())
+		path = getSubsurfaceDataPath(printing_templates);
+	return path;
+}
+
+void copyPath(QString src, QString dst)
+{
+	QDir dir(src);
+	if (!dir.exists())
+		return;
+	foreach (QString d, dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot)) {
+		QString dst_path = dst + QDir::separator() + d;
+		dir.mkpath(dst_path);
+		copyPath(src + QDir::separator() + d, dst_path);
+	}
+	foreach (QString f, dir.entryList(QDir::Files))
+		QFile::copy(src + QDir::separator() + f, dst + QDir::separator() + f);
+}
+
+int gettimezoneoffset(timestamp_t when)
+{
+	QDateTime dt1, dt2;
+	if (when == 0)
+		dt1 = QDateTime::currentDateTime();
+	else
+		dt1 = QDateTime::fromMSecsSinceEpoch(when * 1000);
+	dt2 = dt1.toUTC();
+	dt1.setTimeSpec(Qt::UTC);
+	return dt2.secsTo(dt1);
+}
+
+int parseLengthToMm(const QString &text)
+{
+	int mm;
+	QString numOnly = text;
+	numOnly.replace(",", ".").remove(QRegExp("[^-0-9.]"));
+	if (numOnly.isEmpty())
+		return 0;
+	double number = numOnly.toDouble();
+	if (text.contains(QObject::tr("m"), Qt::CaseInsensitive)) {
+		mm = number * 1000;
+	} else if (text.contains(QObject::tr("ft"), Qt::CaseInsensitive)) {
+		mm = feet_to_mm(number);
+	} else {
+		switch (prefs.units.length) {
+		case units::FEET:
+			mm = feet_to_mm(number);
+			break;
+		case units::METERS:
+			mm = number * 1000;
+			break;
+		default:
+			mm = 0;
+		}
+	}
+	return mm;
+
+}
+
+int parseTemperatureToMkelvin(const QString &text)
+{
+	int mkelvin;
+	QString numOnly = text;
+	numOnly.replace(",", ".").remove(QRegExp("[^-0-9.]"));
+	if (numOnly.isEmpty())
+		return 0;
+	double number = numOnly.toDouble();
+	if (text.contains(QObject::tr("C"), Qt::CaseInsensitive)) {
+		mkelvin = C_to_mkelvin(number);
+	} else if (text.contains(QObject::tr("F"), Qt::CaseInsensitive)) {
+		mkelvin = F_to_mkelvin(number);
+	} else {
+		switch (prefs.units.temperature) {
+		case units::CELSIUS:
+			mkelvin = C_to_mkelvin(number);
+			break;
+		case units::FAHRENHEIT:
+			mkelvin = F_to_mkelvin(number);
+			break;
+		default:
+			mkelvin = 0;
+		}
+	}
+	return mkelvin;
+}
+
+int parseWeightToGrams(const QString &text)
+{
+	int grams;
+	QString numOnly = text;
+	numOnly.replace(",", ".").remove(QRegExp("[^0-9.]"));
+	if (numOnly.isEmpty())
+		return 0;
+	double number = numOnly.toDouble();
+	if (text.contains(QObject::tr("kg"), Qt::CaseInsensitive)) {
+		grams = rint(number * 1000);
+	} else if (text.contains(QObject::tr("lbs"), Qt::CaseInsensitive)) {
+		grams = lbs_to_grams(number);
+	} else {
+		switch (prefs.units.weight) {
+		case units::KG:
+			grams = rint(number * 1000);
+			break;
+		case units::LBS:
+			grams = lbs_to_grams(number);
+			break;
+		default:
+			grams = 0;
+		}
+	}
+	return grams;
+}
+
+int parsePressureToMbar(const QString &text)
+{
+	int mbar;
+	QString numOnly = text;
+	numOnly.replace(",", ".").remove(QRegExp("[^0-9.]"));
+	if (numOnly.isEmpty())
+		return 0;
+	double number = numOnly.toDouble();
+	if (text.contains(QObject::tr("bar"), Qt::CaseInsensitive)) {
+		mbar = rint(number * 1000);
+	} else if (text.contains(QObject::tr("psi"), Qt::CaseInsensitive)) {
+		mbar = psi_to_mbar(number);
+	} else {
+		switch (prefs.units.pressure) {
+		case units::BAR:
+			mbar = rint(number * 1000);
+			break;
+		case units::PSI:
+			mbar = psi_to_mbar(number);
+			break;
+		default:
+			mbar = 0;
+		}
+	}
+	return mbar;
+}
+
+int parseGasMixO2(const QString &text)
+{
+	QString gasString = text;
+	int o2, number;
+	if (gasString.contains(QObject::tr("AIR"), Qt::CaseInsensitive)) {
+		o2 = O2_IN_AIR;
+	} else if (gasString.contains(QObject::tr("EAN"), Qt::CaseInsensitive)) {
+		gasString.remove(QRegExp("[^0-9]"));
+		number = gasString.toInt();
+		o2 = number * 10;
+	} else if (gasString.contains("/")) {
+		QStringList gasSplit = gasString.split("/");
+		number = gasSplit[0].toInt();
+		o2 = number * 10;
+	} else {
+		number = gasString.toInt();
+		o2 = number * 10;
+	}
+	return o2;
+}
+
+int parseGasMixHE(const QString &text)
+{
+	QString gasString = text;
+	int he, number;
+	if (gasString.contains("/")) {
+		QStringList gasSplit = gasString.split("/");
+		number = gasSplit[1].toInt();
+		he = number * 10;
+	} else {
+		he = 0;
+	}
+	return he;
+}
+
+QString get_dive_duration_string(timestamp_t when, QString hourText, QString minutesText)
+{
+	int hrs, mins;
+	mins = (when + 59) / 60;
+	hrs = mins / 60;
+	mins -= hrs * 60;
+
+	QString displayTime;
+	if (hrs)
+		displayTime = QString("%1%2%3%4").arg(hrs).arg(hourText).arg(mins, 2, 10, QChar('0')).arg(minutesText);
+	else
+		displayTime = QString("%1%2").arg(mins).arg(minutesText);
+
+	return displayTime;
+}
+
+QString get_dive_date_string(timestamp_t when)
+{
+	QDateTime ts;
+	ts.setMSecsSinceEpoch(when * 1000L);
+	return loc.toString(ts.toUTC(), QString(prefs.date_format) + " " + prefs.time_format);
+}
+
+QString get_short_dive_date_string(timestamp_t when)
+{
+	QDateTime ts;
+	ts.setMSecsSinceEpoch(when * 1000L);
+	return loc.toString(ts.toUTC(), QString(prefs.date_format_short) + " " + prefs.time_format);
+}
+
+const char *get_dive_date_c_string(timestamp_t when)
+{
+	QString text = get_dive_date_string(when);
+	return strdup(text.toUtf8().data());
+}
+
+bool is_same_day(timestamp_t trip_when, timestamp_t dive_when)
+{
+	static timestamp_t twhen = (timestamp_t) 0;
+	static struct tm tmt;
+	struct tm tmd;
+
+	utc_mkdate(dive_when, &tmd);
+
+	if (twhen != trip_when) {
+		twhen = trip_when;
+		utc_mkdate(twhen, &tmt);
+	}
+
+	return ((tmd.tm_mday == tmt.tm_mday) && (tmd.tm_mon == tmt.tm_mon) && (tmd.tm_year == tmt.tm_year));
+}
+
+QString get_trip_date_string(timestamp_t when, int nr, bool getday)
+{
+	struct tm tm;
+	utc_mkdate(when, &tm);
+	QDateTime localTime = QDateTime::fromTime_t(when);
+	localTime.setTimeSpec(Qt::UTC);
+	QString ret ;
+
+	QString suffix = " " + QObject::tr("(%n dive(s))", "", nr);
+	if (getday) {
+		ret = localTime.date().toString(prefs.date_format) + suffix;
+	} else {
+		ret = localTime.date().toString("MMM yy") + suffix;
+	}
+	return ret;
+
+}
+
+extern "C" void reverseGeoLookup(degrees_t latitude, degrees_t longitude, uint32_t uuid)
+{
+	QNetworkRequest request;
+	QNetworkAccessManager *rgl = new QNetworkAccessManager();
+	request.setUrl(QString("http://open.mapquestapi.com/nominatim/v1/reverse.php?format=json&accept-language=%1&lat=%2&lon=%3")
+		       .arg(uiLanguage(NULL)).arg(latitude.udeg / 1000000.0).arg(longitude.udeg / 1000000.0));
+	request.setRawHeader("Accept", "text/json");
+	request.setRawHeader("User-Agent", getUserAgent().toUtf8());
+	QNetworkReply *reply = rgl->get(request);
+	QEventLoop loop;
+	QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
+	loop.exec();
+	QJsonParseError errorObject;
+	QJsonDocument jsonDoc = QJsonDocument::fromJson(reply->readAll(), &errorObject);
+	if (errorObject.error != QJsonParseError::NoError) {
+		qDebug() << errorObject.errorString();
+	} else {
+		QJsonObject obj = jsonDoc.object();
+		QJsonObject address = obj.value("address").toObject();
+		qDebug() << "found country:" << address.value("country").toString();
+		struct dive_site *ds = get_dive_site_by_uuid(uuid);
+		ds->notes = add_to_string(ds->notes, "countrytag: %s", address.value("country").toString().toUtf8().data());
+	}
+}
+
+QHash<QString, QByteArray> hashOf;
+QMutex hashOfMutex;
+QHash<QByteArray, QString> localFilenameOf;
+QHash <QString, QImage > thumbnailCache;
+
+extern "C" char * hashstring(char * filename)
+{
+	return hashOf[QString(filename)].toHex().data();
+}
+
+const QString hashfile_name()
+{
+	return QString(system_default_directory()).append("/hashes");
+}
+
+extern "C" char *hashfile_name_string()
+{
+	return strdup(hashfile_name().toUtf8().data());
+}
+
+void read_hashes()
+{
+	QFile hashfile(hashfile_name());
+	if (hashfile.open(QIODevice::ReadOnly)) {
+		QDataStream stream(&hashfile);
+		stream >> localFilenameOf;
+		stream >> hashOf;
+		stream >> thumbnailCache;
+		hashfile.close();
+	}
+}
+
+void write_hashes()
+{
+	QSaveFile hashfile(hashfile_name());
+	if (hashfile.open(QIODevice::WriteOnly)) {
+		QDataStream stream(&hashfile);
+		stream << localFilenameOf;
+		stream << hashOf;
+		stream << thumbnailCache;
+		hashfile.commit();
+	} else {
+		qDebug() << "cannot open" << hashfile.fileName();
+	}
+}
+
+void add_hash(const QString filename, QByteArray hash)
+{
+	QMutexLocker locker(&hashOfMutex);
+	hashOf[filename] =  hash;
+	localFilenameOf[hash] = filename;
+}
+
+QByteArray hashFile(const QString filename)
+{
+	QCryptographicHash hash(QCryptographicHash::Sha1);
+	QFile imagefile(filename);
+	if (imagefile.exists() && imagefile.open(QIODevice::ReadOnly)) {
+		hash.addData(&imagefile);
+		add_hash(filename, hash.result());
+		return hash.result();
+	} else {
+		return QByteArray();
+	}
+}
+
+void learnHash(struct picture *picture, QByteArray hash)
+{
+	if (picture->hash)
+		free(picture->hash);
+	QMutexLocker locker(&hashOfMutex);
+	hashOf[QString(picture->filename)] = hash;
+	picture->hash = strdup(hash.toHex());
+}
+
+QString localFilePath(const QString originalFilename)
+{
+	if (hashOf.contains(originalFilename) && localFilenameOf.contains(hashOf[originalFilename]))
+		return localFilenameOf[hashOf[originalFilename]];
+	else
+		return originalFilename;
+}
+
+QString fileFromHash(char *hash)
+{
+	return localFilenameOf[QByteArray::fromHex(hash)];
+}
+
+// This needs to operate on a copy of picture as it frees it after finishing!
+void updateHash(struct picture *picture) {
+	QByteArray hash = hashFile(fileFromHash(picture->hash));
+	learnHash(picture, hash);
+	picture_free(picture);
+}
+
+// This needs to operate on a copy of picture as it frees it after finishing!
+void hashPicture(struct picture *picture)
+{
+	char *oldHash = copy_string(picture->hash);
+	learnHash(picture, hashFile(QString(picture->filename)));
+	if (!same_string(picture->hash, "") && !same_string(picture->hash, oldHash))
+		mark_divelist_changed((true));
+	free(oldHash);
+	picture_free(picture);
+}
+
+extern "C" void cache_picture(struct picture *picture)
+{
+	QString filename = picture->filename;
+	if (!hashOf.contains(filename))
+		QtConcurrent::run(hashPicture, clone_picture(picture));
+}
+
+void learnImages(const QDir dir, int max_recursions)
+{
+	QStringList filters, files;
+
+	if (max_recursions) {
+		foreach (QString dirname, dir.entryList(QStringList(), QDir::NoDotAndDotDot | QDir::Dirs)) {
+			learnImages(QDir(dir.filePath(dirname)), max_recursions - 1);
+		}
+	}
+
+	foreach (QString format, QImageReader::supportedImageFormats()) {
+		filters.append(QString("*.").append(format));
+	}
+
+	foreach (QString file, dir.entryList(filters, QDir::Files)) {
+		files.append(dir.absoluteFilePath(file));
+	}
+
+	QtConcurrent::blockingMap(files, hashFile);
+}
+
+extern "C" const char *local_file_path(struct picture *picture)
+{
+	QString hashString = picture->hash;
+	if (hashString.isEmpty()) {
+		QByteArray hash = hashFile(picture->filename);
+		free(picture->hash);
+		picture->hash = strdup(hash.toHex().data());
+	}
+	QString localFileName = fileFromHash(picture->hash);
+	if (localFileName.isEmpty())
+		localFileName = picture->filename;
+	return strdup(qPrintable(localFileName));
+}
+
+extern "C" bool picture_exists(struct picture *picture)
+{
+	QString localFilename = fileFromHash(picture->hash);
+	QByteArray hash = hashFile(localFilename);
+	return same_string(hash.toHex().data(), picture->hash);
+}
+
+const QString picturedir()
+{
+	return QString(system_default_directory()).append("/picturedata/");
+}
+
+extern "C" char *picturedir_string()
+{
+	return strdup(picturedir().toUtf8().data());
+}
+
+/* when we get a picture from git storage (local or remote) and can't find the picture
+ * based on its hash, we create a local copy with the hash as filename and the appropriate
+ * suffix */
+extern "C" void savePictureLocal(struct picture *picture, const char *data, int len)
+{
+	QString dirname = picturedir();
+	QDir localPictureDir(dirname);
+	localPictureDir.mkpath(dirname);
+	QString suffix(picture->filename);
+	suffix.replace(QRegularExpression(".*\\."), "");
+	QString filename(dirname + picture->hash + "." + suffix);
+	QSaveFile out(filename);
+	if (out.open(QIODevice::WriteOnly)) {
+		out.write(data, len);
+		out.commit();
+		add_hash(filename, QByteArray::fromHex(picture->hash));
+	}
+}
+
+extern "C" void picture_load_exif_data(struct picture *p)
+{
+	EXIFInfo exif;
+	memblock mem;
+
+	if (readfile(localFilePath(QString(p->filename)).toUtf8().data(), &mem) <= 0)
+		goto picture_load_exit;
+	if (exif.parseFrom((const unsigned char *)mem.buffer, (unsigned)mem.size) != PARSE_EXIF_SUCCESS)
+		goto picture_load_exit;
+	p->longitude.udeg= lrint(1000000.0 * exif.GeoLocation.Longitude);
+	p->latitude.udeg  = lrint(1000000.0 * exif.GeoLocation.Latitude);
+
+picture_load_exit:
+	free(mem.buffer);
+	return;
+}
+
+QString get_gas_string(struct gasmix gas)
+{
+	uint o2 = (get_o2(&gas) + 5) / 10, he = (get_he(&gas) + 5) / 10;
+	QString result = gasmix_is_air(&gas) ? QObject::tr("AIR") : he == 0 ? (o2 == 100 ? QObject::tr("OXYGEN") : QString("EAN%1").arg(o2, 2, 10, QChar('0'))) : QString("%1/%2").arg(o2).arg(he);
+	return result;
+}
+
+QString get_divepoint_gas_string(const divedatapoint &p)
+{
+	return get_gas_string(p.gasmix);
+}
+
+weight_t string_to_weight(const char *str)
+{
+	const char *end;
+	double value = strtod_flags(str, &end, 0);
+	QString rest = QString(end).trimmed();
+	QString local_kg = QObject::tr("kg");
+	QString local_lbs = QObject::tr("lbs");
+	weight_t weight;
+
+	if (rest.startsWith("kg") || rest.startsWith(local_kg))
+		goto kg;
+	// using just "lb" instead of "lbs" is intentional - some people might enter the singular
+	if (rest.startsWith("lb") || rest.startsWith(local_lbs))
+		goto lbs;
+	if (prefs.units.weight == prefs.units.LBS)
+		goto lbs;
+kg:
+	weight.grams = rint(value * 1000);
+	return weight;
+lbs:
+	weight.grams = lbs_to_grams(value);
+	return weight;
+}
+
+depth_t string_to_depth(const char *str)
+{
+	const char *end;
+	double value = strtod_flags(str, &end, 0);
+	QString rest = QString(end).trimmed();
+	QString local_ft = QObject::tr("ft");
+	QString local_m = QObject::tr("m");
+	depth_t depth;
+
+	if (rest.startsWith("m") || rest.startsWith(local_m))
+		goto m;
+	if (rest.startsWith("ft") || rest.startsWith(local_ft))
+		goto ft;
+	if (prefs.units.length == prefs.units.FEET)
+		goto ft;
+m:
+	depth.mm = rint(value * 1000);
+	return depth;
+ft:
+	depth.mm = feet_to_mm(value);
+	return depth;
+}
+
+pressure_t string_to_pressure(const char *str)
+{
+	const char *end;
+	double value = strtod_flags(str, &end, 0);
+	QString rest = QString(end).trimmed();
+	QString local_psi = QObject::tr("psi");
+	QString local_bar = QObject::tr("bar");
+	pressure_t pressure;
+
+	if (rest.startsWith("bar") || rest.startsWith(local_bar))
+		goto bar;
+	if (rest.startsWith("psi") || rest.startsWith(local_psi))
+		goto psi;
+	if (prefs.units.pressure == prefs.units.PSI)
+		goto psi;
+bar:
+	pressure.mbar = rint(value * 1000);
+	return pressure;
+psi:
+	pressure.mbar = psi_to_mbar(value);
+	return pressure;
+}
+
+volume_t string_to_volume(const char *str, pressure_t workp)
+{
+	const char *end;
+	double value = strtod_flags(str, &end, 0);
+	QString rest = QString(end).trimmed();
+	QString local_l = QObject::tr("l");
+	QString local_cuft = QObject::tr("cuft");
+	volume_t volume;
+
+	if (rest.startsWith("l") || rest.startsWith("ℓ") || rest.startsWith(local_l))
+		goto l;
+	if (rest.startsWith("cuft") || rest.startsWith(local_cuft))
+		goto cuft;
+	/*
+	 * If we don't have explicit units, and there is no working
+	 * pressure, we're going to assume "liter" even in imperial
+	 * measurements.
+	 */
+	if (!workp.mbar)
+		goto l;
+	if (prefs.units.volume == prefs.units.LITER)
+		goto l;
+cuft:
+	if (workp.mbar)
+		value /= bar_to_atm(workp.mbar / 1000.0);
+	value = cuft_to_l(value);
+l:
+	volume.mliter = rint(value * 1000);
+	return volume;
+}
+
+fraction_t string_to_fraction(const char *str)
+{
+	const char *end;
+	double value = strtod_flags(str, &end, 0);
+	fraction_t fraction;
+
+	fraction.permille = rint(value * 10);
+	return fraction;
+}
+
+int getCloudURL(QString &filename)
+{
+	QString email = QString(prefs.cloud_storage_email);
+	email.replace(QRegularExpression("[^a-zA-Z0-9@._+-]"), "");
+	if (email.isEmpty() || same_string(prefs.cloud_storage_password, ""))
+		return report_error("Please configure Cloud storage email and password in the preferences");
+	if (email != prefs.cloud_storage_email_encoded) {
+		free(prefs.cloud_storage_email_encoded);
+		prefs.cloud_storage_email_encoded = strdup(qPrintable(email));
+	}
+	filename = QString(QString(prefs.cloud_git_url) + "/%1[%1]").arg(email);
+	if (verbose)
+		qDebug() << "cloud URL set as" << filename;
+	return 0;
+}
+
+extern "C" char *cloud_url()
+{
+	QString filename;
+	getCloudURL(filename);
+	return strdup(filename.toUtf8().data());
+}
+
+void loadPreferences()
+{
+	QSettings s;
+	QVariant v;
+
+	uiLanguage(NULL);
+	s.beginGroup("Units");
+	if (s.value("unit_system").toString() == "metric") {
+		prefs.unit_system = METRIC;
+		prefs.units = SI_units;
+	} else if (s.value("unit_system").toString() == "imperial") {
+		prefs.unit_system = IMPERIAL;
+		prefs.units = IMPERIAL_units;
+	} else {
+		prefs.unit_system = PERSONALIZE;
+		GET_UNIT("length", length, units::FEET, units::METERS);
+		GET_UNIT("pressure", pressure, units::PSI, units::BAR);
+		GET_UNIT("volume", volume, units::CUFT, units::LITER);
+		GET_UNIT("temperature", temperature, units::FAHRENHEIT, units::CELSIUS);
+		GET_UNIT("weight", weight, units::LBS, units::KG);
+	}
+	GET_UNIT("vertical_speed_time", vertical_speed_time, units::MINUTES, units::SECONDS);
+	GET_BOOL("coordinates", coordinates_traditional);
+	s.endGroup();
+	s.beginGroup("TecDetails");
+	GET_BOOL("po2graph", pp_graphs.po2);
+	GET_BOOL("pn2graph", pp_graphs.pn2);
+	GET_BOOL("phegraph", pp_graphs.phe);
+	GET_DOUBLE("po2threshold", pp_graphs.po2_threshold);
+	GET_DOUBLE("pn2threshold", pp_graphs.pn2_threshold);
+	GET_DOUBLE("phethreshold", pp_graphs.phe_threshold);
+	GET_BOOL("mod", mod);
+	GET_DOUBLE("modpO2", modpO2);
+	GET_BOOL("ead", ead);
+	GET_BOOL("redceiling", redceiling);
+	GET_BOOL("dcceiling", dcceiling);
+	GET_BOOL("calcceiling", calcceiling);
+	GET_BOOL("calcceiling3m", calcceiling3m);
+	GET_BOOL("calcndltts", calcndltts);
+	GET_BOOL("calcalltissues", calcalltissues);
+	GET_BOOL("hrgraph", hrgraph);
+	GET_BOOL("tankbar", tankbar);
+	GET_BOOL("RulerBar", rulergraph);
+	GET_BOOL("percentagegraph", percentagegraph);
+	GET_INT("gflow", gflow);
+	GET_INT("gfhigh", gfhigh);
+	GET_BOOL("gf_low_at_maxdepth", gf_low_at_maxdepth);
+	GET_BOOL("show_ccr_setpoint",show_ccr_setpoint);
+	GET_BOOL("show_ccr_sensors",show_ccr_sensors);
+	GET_BOOL("zoomed_plot", zoomed_plot);
+	set_gf(prefs.gflow, prefs.gfhigh, prefs.gf_low_at_maxdepth);
+	GET_BOOL("show_sac", show_sac);
+	GET_BOOL("display_unused_tanks", display_unused_tanks);
+	GET_BOOL("show_average_depth", show_average_depth);
+	s.endGroup();
+
+	s.beginGroup("GeneralSettings");
+	GET_TXT("default_filename", default_filename);
+	GET_INT("default_file_behavior", default_file_behavior);
+	if (prefs.default_file_behavior == UNDEFINED_DEFAULT_FILE) {
+		// undefined, so check if there's a filename set and
+		// use that, otherwise go with no default file
+		if (QString(prefs.default_filename).isEmpty())
+			prefs.default_file_behavior = NO_DEFAULT_FILE;
+		else
+			prefs.default_file_behavior = LOCAL_DEFAULT_FILE;
+	}
+	GET_TXT("default_cylinder", default_cylinder);
+	GET_BOOL("use_default_file", use_default_file);
+	GET_INT("defaultsetpoint", defaultsetpoint);
+	GET_INT("o2consumption", o2consumption);
+	GET_INT("pscr_ratio", pscr_ratio);
+	s.endGroup();
+
+	s.beginGroup("Display");
+	// get the font from the settings or our defaults
+	// respect the system default font size if none is explicitly set
+	QFont defaultFont = s.value("divelist_font", prefs.divelist_font).value<QFont>();
+	if (IS_FP_SAME(system_divelist_default_font_size, -1.0)) {
+		prefs.font_size = qApp->font().pointSizeF();
+		system_divelist_default_font_size = prefs.font_size; // this way we don't save it on exit
+	}
+	prefs.font_size = s.value("font_size", prefs.font_size).toFloat();
+	// painful effort to ignore previous default fonts on Windows - ridiculous
+	QString fontName = defaultFont.toString();
+	if (fontName.contains(","))
+		fontName = fontName.left(fontName.indexOf(","));
+	if (subsurface_ignore_font(fontName.toUtf8().constData())) {
+		defaultFont = QFont(prefs.divelist_font);
+	} else {
+		free((void *)prefs.divelist_font);
+		prefs.divelist_font = strdup(fontName.toUtf8().constData());
+	}
+	defaultFont.setPointSizeF(prefs.font_size);
+	qApp->setFont(defaultFont);
+	GET_INT("displayinvalid", display_invalid_dives);
+	s.endGroup();
+
+	s.beginGroup("Animations");
+	GET_INT("animation_speed", animation_speed);
+	s.endGroup();
+
+	s.beginGroup("Network");
+	GET_INT_DEF("proxy_type", proxy_type, QNetworkProxy::DefaultProxy);
+	GET_TXT("proxy_host", proxy_host);
+	GET_INT("proxy_port", proxy_port);
+	GET_BOOL("proxy_auth", proxy_auth);
+	GET_TXT("proxy_user", proxy_user);
+	GET_TXT("proxy_pass", proxy_pass);
+	s.endGroup();
+
+	s.beginGroup("CloudStorage");
+	GET_TXT("email", cloud_storage_email);
+#ifndef SUBSURFACE_MOBILE
+	GET_BOOL("save_password_local", save_password_local);
+#else
+	// always save the password in Subsurface-mobile
+	prefs.save_password_local = true;
+#endif
+	if (prefs.save_password_local) { // GET_TEXT macro is not a single statement
+		GET_TXT("password", cloud_storage_password);
+	}
+	GET_INT("cloud_verification_status", cloud_verification_status);
+	GET_BOOL("cloud_background_sync", cloud_background_sync);
+	GET_BOOL("git_local_only", git_local_only);
+
+	// creating the git url here is simply a convenience when C code wants
+	// to compare against that git URL - it's always derived from the base URL
+	GET_TXT("cloud_base_url", cloud_base_url);
+	prefs.cloud_git_url = strdup(qPrintable(QString(prefs.cloud_base_url) + "/git"));
+	s.endGroup();
+
+	// Subsurface webservice id is stored outside of the groups
+	GET_TXT("subsurface_webservice_uid", userid);
+
+	// but the related time / distance threshold (only used in the mobile app)
+	// are in their own group
+	s.beginGroup("locationService");
+	GET_INT("distance_threshold", distance_threshold);
+	GET_INT("time_threshold", time_threshold);
+	s.endGroup();
+
+	// GeoManagement
+	s.beginGroup("geocoding");
+#ifdef DISABLED
+	GET_BOOL("enable_geocoding", geocoding.enable_geocoding);
+	GET_BOOL("parse_dive_without_gps", geocoding.parse_dive_without_gps);
+	GET_BOOL("tag_existing_dives", geocoding.tag_existing_dives);
+#else
+	prefs.geocoding.enable_geocoding = true;
+#endif
+	GET_ENUM("cat0", taxonomy_category, geocoding.category[0]);
+	GET_ENUM("cat1", taxonomy_category, geocoding.category[1]);
+	GET_ENUM("cat2", taxonomy_category, geocoding.category[2]);
+	s.endGroup();
+
+	// GPS service time and distance thresholds
+	s.beginGroup("LocationService");
+	GET_INT("time_threshold", time_threshold);
+	GET_INT("distance_threshold", distance_threshold);
+	s.endGroup();
+}
+
+extern "C" bool isCloudUrl(const char *filename)
+{
+	QString email = QString(prefs.cloud_storage_email);
+	email.replace(QRegularExpression("[^a-zA-Z0-9@._+-]"), "");
+	if (!email.isEmpty() &&
+	    QString(QString(prefs.cloud_git_url) + "/%1[%1]").arg(email) == filename)
+		return true;
+	return false;
+}
+
+extern "C" bool getProxyString(char **buffer)
+{
+	if (prefs.proxy_type == QNetworkProxy::HttpProxy) {
+		QString proxy;
+		if (prefs.proxy_auth)
+			proxy = QString("http://%1:%2@%3:%4").arg(prefs.proxy_user).arg(prefs.proxy_pass)
+					.arg(prefs.proxy_host).arg(prefs.proxy_port);
+		else
+			proxy = QString("http://%1:%2").arg(prefs.proxy_host).arg(prefs.proxy_port);
+		if (buffer)
+			*buffer = strdup(qPrintable(proxy));
+		return true;
+	}
+	return false;
+}
+
+extern "C" void subsurface_mkdir(const char *dir)
+{
+	QDir directory;
+	if (!directory.mkpath(QString(dir)))
+		qDebug() << "failed to create path" << dir;
+}
+
+extern "C" void parse_display_units(char *line)
+{
+	qDebug() << line;
+}
+
+static QByteArray currentApplicationState;
+
+QByteArray getCurrentAppState()
+{
+	return currentApplicationState;
+}
+
+void setCurrentAppState(QByteArray state)
+{
+	currentApplicationState = state;
+}
+
+extern "C" bool in_planner()
+{
+	return (currentApplicationState == "PlanDive" || currentApplicationState == "EditPlannedDive");
+}
+
+void init_proxy()
+{
+	QNetworkProxy proxy;
+	proxy.setType(QNetworkProxy::ProxyType(prefs.proxy_type));
+	proxy.setHostName(prefs.proxy_host);
+	proxy.setPort(prefs.proxy_port);
+	if (prefs.proxy_auth) {
+		proxy.setUser(prefs.proxy_user);
+		proxy.setPassword(prefs.proxy_pass);
+	}
+	QNetworkProxy::setApplicationProxy(proxy);
+}
+
+QString getUUID()
+{
+	QString uuidString;
+	QSettings settings;
+	settings.beginGroup("UpdateManager");
+	if (settings.contains("UUID")) {
+		uuidString = settings.value("UUID").toString();
+	} else {
+		QUuid uuid = QUuid::createUuid();
+		uuidString = uuid.toString();
+		settings.setValue("UUID", uuidString);
+	}
+	uuidString.replace("{", "").replace("}", "");
+	return uuidString;
+}