core: default initialize units-type objects to 0

Makes the code much nicer to read.

Default initialize cylinder_t to the empty cylinder.

This produces lots of warnings, because most structure are now
not PODs anymore and shouldn't be erased using memset().

These memset()s will be removed one-by-one and replaced by
proper constructors.

The whole ordeal made it necessary to add a constructor to
struct event. To simplify things the whole optimization of
the variable-size event names was removed. In upcoming commits
this will be replaced by std::string anyway.

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

commands/command_edit.cpp

@@ -1115,8 +1115,7 @@ void EditWeight::undo()
 
 // ***** Add Cylinder *****
 AddCylinder::AddCylinder(bool currentDiveOnly) :
-	EditDivesBase(currentDiveOnly),
-	cyl(empty_cylinder)
+	EditDivesBase(currentDiveOnly)
 {
 	if (dives.empty())
 		return;

commands/command_event.cpp

@@ -186,7 +186,7 @@ bool AddGasSwitch::workToBeDone()
 
 void AddGasSwitch::redoit()
 {
-	std::vector<OwningEventPtr> newEventsToAdd;
+	std::vector<std::unique_ptr<event>> newEventsToAdd;
 	std::vector<event *> newEventsToRemove;
 	newEventsToAdd.reserve(eventsToRemove.size());
 	newEventsToRemove.reserve(eventsToAdd.size());
@@ -196,7 +196,7 @@ void AddGasSwitch::redoit()
 		remove_event_from_dc(dc, ev);
 		newEventsToAdd.emplace_back(ev); // take ownership of event
 	}
-	for (OwningEventPtr &ev: eventsToAdd) {
+	for (auto &ev: eventsToAdd) {
 		newEventsToRemove.push_back(ev.get());
 		add_event_to_dc(dc, ev.release()); // return ownership to backend
 	}

commands/command_event.h

@@ -42,7 +42,7 @@ protected:
 private:
 	bool workToBeDone() override;
 
-	OwningEventPtr eventToAdd;	// for redo
+	std::unique_ptr<event> eventToAdd;	// for redo
 	event *eventToRemove;			// for undo
 };
 
@@ -73,7 +73,7 @@ private:
 	void undoit() override;
 	void redoit() override;
 
-	OwningEventPtr eventToAdd;	// for undo and redo
+	std::unique_ptr<event> eventToAdd;	// for undo and redo
 	event *eventToRemove;			// for undo and redo
 };
 
@@ -86,7 +86,7 @@ private:
 	void redoit() override;
 	void post() const; // Called to fix up dives should a gas-change have happened.
 
-	OwningEventPtr eventToAdd;	// for undo
+	std::unique_ptr<event> eventToAdd;	// for undo
 	event *eventToRemove;			// for redo
 	int cylinder;				// affected cylinder (if removing gas switch). <0: not a gas switch.
 };
@@ -100,7 +100,7 @@ private:
 	void redoit() override;
 
 	std::vector<int> cylinders; // cylinders that are modified
-	std::vector<OwningEventPtr> eventsToAdd;
+	std::vector<std::unique_ptr<event>> eventsToAdd;
 	std::vector<event *> eventsToRemove;
 };
 

core/cochran.cpp

@@ -676,7 +676,7 @@ static void cochran_parse_dive(const unsigned char *decode, unsigned mod,
 	case TYPE_GEMINI:
 	case TYPE_COMMANDER:
 		if (config.type == TYPE_GEMINI) {
-			cylinder_t cyl = empty_cylinder;
+			cylinder_t cyl;
 			dc->model = "Gemini";
 			dc->deviceid = buf[0x18c] * 256 + buf[0x18d];	// serial no
 			fill_default_cylinder(dive, &cyl);
@@ -688,7 +688,7 @@ static void cochran_parse_dive(const unsigned char *decode, unsigned mod,
 			dc->model = "Commander";
 			dc->deviceid = array_uint32_le(buf + 0x31e);	// serial no
 			for (g = 0; g < 2; g++) {
-				cylinder_t cyl = empty_cylinder;
+				cylinder_t cyl;
 				fill_default_cylinder(dive, &cyl);
 				cyl.gasmix.o2.permille = (log[CMD_O2_PERCENT + g * 2] / 256
 					+ log[CMD_O2_PERCENT + g * 2 + 1]) * 10;
@@ -731,7 +731,7 @@ static void cochran_parse_dive(const unsigned char *decode, unsigned mod,
 		dc->model = "EMC";
 		dc->deviceid = array_uint32_le(buf + 0x31e);	// serial no
 		for (g = 0; g < 4; g++) {
-			cylinder_t cyl = empty_cylinder;
+			cylinder_t cyl;
 			fill_default_cylinder(dive, &cyl);
 			cyl.gasmix.o2.permille =
 				(log[EMC_O2_PERCENT + g * 2] / 256

core/datatrak.cpp

@@ -334,7 +334,7 @@ static char *dt_dive_parser(unsigned char *runner, struct dive *dt_dive, struct
 	 */
 	read_bytes(2);
 	if (tmp_2bytes != 0x7FFF) {
-		cylinder_t cyl = empty_cylinder;
+		cylinder_t cyl;
 		std::string desc = cyl_type_by_size(tmp_2bytes * 10);
 		cyl.type.size.mliter = tmp_2bytes * 10;
 		cyl.type.description = desc.c_str();

core/dive.cpp

@@ -915,7 +915,7 @@ static void fixup_dc_events(struct divecomputer *dc)
 	while (event) {
 		if (event->next && event->next->deleted) {
 			struct event *nextnext = event->next->next;
-			free(event->next);
+			delete event->next;
 			event->next = nextnext;
 		} else {
 			event = event->next;
@@ -2814,7 +2814,7 @@ static int split_dive_at(const struct dive *dive, int a, int b, struct dive **ou
 		*evp = NULL;
 		while (event) {
 			struct event *next = event->next;
-			free(event);
+			delete event;
 			event = next;
 		}
 
@@ -2823,7 +2823,7 @@ static int split_dive_at(const struct dive *dive, int a, int b, struct dive **ou
 		while ((event = *evp) != NULL) {
 			if (event->time.seconds < t) {
 				*evp = event->next;
-				free(event);
+				delete event;
 			} else {
 				event->time.seconds -= t;
 			}

core/divesite.h

@@ -14,7 +14,7 @@ struct dive_site
 	uint32_t uuid = 0;
 	std::string name;
 	std::vector<dive *> dives;
-	location_t location = { { 9 }, { 0 } };
+	location_t location;
 	std::string description;
 	std::string notes;
 	taxonomy_data taxonomy;

core/equipment.cpp

@@ -205,7 +205,7 @@ void add_cylinder(struct cylinder_table *t, int idx, cylinder_t cyl)
 	 * every single cylinder table there is an empty cylinder that can
 	 * be used by the planner as "surface air" cylinder. Fix this.
 	 */
-	add_to_cylinder_table(t, t->nr, empty_cylinder);
+	add_to_cylinder_table(t, t->nr, cylinder_t());
 	t->nr--;
 	t->cylinders[t->nr].cylinder_use = NOT_USED;
 }
@@ -418,7 +418,7 @@ void copy_cylinder_types(const struct dive *s, struct dive *d)
 
 cylinder_t *add_empty_cylinder(struct cylinder_table *t)
 {
-	cylinder_t cyl = empty_cylinder;
+	cylinder_t cyl;
 	cyl.type.description = strdup("");
 	add_cylinder(t, t->nr, cyl);
 	return &t->cylinders[t->nr - 1];
@@ -483,7 +483,7 @@ void fill_default_cylinder(const struct dive *dive, cylinder_t *cyl)
 
 cylinder_t create_new_cylinder(const struct dive *d)
 {
-	cylinder_t cyl = empty_cylinder;
+	cylinder_t cyl;
 	fill_default_cylinder(d, &cyl);
 	cyl.start = cyl.type.workingpressure;
 	cyl.cylinder_use = OC_GAS;
@@ -507,7 +507,6 @@ void add_default_cylinder(struct dive *d)
 	if (!empty_string(prefs.default_cylinder)) {
 		cyl = create_new_cylinder(d);
 	} else {
-		cyl = empty_cylinder;
 		// roughly an AL80
 		cyl.type.description = strdup(translate("gettextFromC", "unknown"));
 		cyl.type.size.mliter = 11100;

core/equipment.h

@@ -17,25 +17,23 @@ typedef struct
 {
 	volume_t size;
 	pressure_t workingpressure;
-	const char *description; /* "LP85", "AL72", "AL80", "HP100+" or whatever */
+	const char *description = nullptr; /* "LP85", "AL72", "AL80", "HP100+" or whatever */
 } cylinder_type_t;
 
 typedef struct
 {
 	cylinder_type_t type;
-	struct gasmix gasmix;
+	struct gasmix gasmix = gasmix_air;
 	pressure_t start, end, sample_start, sample_end;
 	depth_t depth;
-	bool manually_added;
+	bool manually_added = false;
 	volume_t gas_used;
 	volume_t deco_gas_used;
-	enum cylinderuse cylinder_use;
-	bool bestmix_o2;
-	bool bestmix_he;
+	enum cylinderuse cylinder_use = OC_GAS;
+	bool bestmix_o2 = false;
+	bool bestmix_he = false;
 } cylinder_t;
 
-static const cylinder_t empty_cylinder = { { { 0 }, { 0 }, (const char *)0}, { { 0 }, { 0 } } , { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, false, { 0 }, { 0 }, OC_GAS, false, false };
-
 /* Table of cylinders. Attention: this stores cylinders,
  * *not* pointers to cylinders. This has two crucial consequences:
  * 1) Pointers to cylinders are not stable. They may be

core/event.cpp

@@ -6,6 +6,19 @@
 #include <string.h>
 #include <stdlib.h>
 
+event::event() : next(nullptr), type(SAMPLE_EVENT_NONE), flags(0), value(0),
+	divemode(OC), deleted(false), hidden(false)
+{
+	memset(name, 0, MAX_EVENT_NAME);
+	/* That overwrites divemode. Is this a smart thing to do? */
+	gas.index = -1;
+	gas.mix = gasmix_air;
+}
+
+event::~event()
+{
+}
+
 int event_is_gaschange(const struct event *ev)
 {
 	return ev->type == SAMPLE_EVENT_GASCHANGE ||
@@ -23,11 +36,8 @@ struct event *clone_event(const struct event *src_ev)
 	if (!src_ev)
 		return NULL;
 
-	size_t size = sizeof(*src_ev) + strlen(src_ev->name) + 1;
-	ev = (struct event*) malloc(size);
-	if (!ev)
-		exit(1);
-	memcpy(ev, src_ev, size);
+	ev = new event;
+	*ev = *src_ev;
 	ev->next = NULL;
 
 	return ev;
@@ -37,7 +47,7 @@ void free_events(struct event *ev)
 {
 	while (ev) {
 		struct event *next = ev->next;
-		free(ev);
+		delete ev;
 		ev = next;
 	}
 }
@@ -46,14 +56,9 @@ struct event *create_event(unsigned int time, int type, int flags, int value, co
 {
 	int gas_index = -1;
 	struct event *ev;
-	unsigned int size, len = strlen(name);
 
-	size = sizeof(*ev) + len + 1;
-	ev = (struct event*) malloc(size);
-	if (!ev)
-		return NULL;
-	memset(ev, 0, size);
-	memcpy(ev->name, name, len);
+	ev = new event;
+	strncpy(ev->name, name, MAX_EVENT_NAME - 1);
 	ev->time.seconds = time;
 	ev->type = type;
 	ev->flags = flags;

core/event.h

@@ -19,6 +19,8 @@ enum event_severity {
  * Events are currently based straight on what libdivecomputer gives us.
  *  We need to wrap these into our own events at some point to remove some of the limitations.
  */
+#define MAX_EVENT_NAME 128
+
 struct event {
 	struct event *next;
 	duration_t time;
@@ -40,7 +42,9 @@ struct event {
 	};
 	bool deleted; // used internally in the parser and in fixup_dive().
 	bool hidden;
-	char name[];
+	char name[MAX_EVENT_NAME];
+	event();
+	~event();
 };
 
 extern int event_is_gaschange(const struct event *ev);

core/gas.cpp

@@ -62,7 +62,7 @@ void sanitize_gasmix(struct gasmix *mix)
 	if (o2 <= 1000 && he <= 1000 && o2 + he <= 1000)
 		return;
 	report_info("Odd gasmix: %u O2 %u He", o2, he);
-	memset(mix, 0, sizeof(*mix));
+	*mix = gasmix_air;
 }
 
 int gasmix_distance(struct gasmix a, struct gasmix b)

core/imagedownloader.cpp

@@ -96,7 +96,7 @@ Thumbnailer::Thumbnail Thumbnailer::fetchImage(const QString &urlfilename, const
 
 		// For io error or video, return early with the appropriate dummy-icon.
 		if (type == MEDIATYPE_IO_ERROR)
-			return { failImage, MEDIATYPE_IO_ERROR, zero_duration };
+			return { failImage, MEDIATYPE_IO_ERROR, duration_t() };
 		else if (type == MEDIATYPE_VIDEO)
 			return fetchVideoThumbnail(filename, originalFilename, md.duration);
 
@@ -112,7 +112,7 @@ Thumbnailer::Thumbnail Thumbnailer::fetchImage(const QString &urlfilename, const
 		// Try to check for a video-file extension. Since we couldn't parse the video file,
 		// we pass 0 as the duration.
 		if (hasVideoFileExtension(filename))
-			return fetchVideoThumbnail(filename, originalFilename, zero_duration);
+			return fetchVideoThumbnail(filename, originalFilename, duration_t());
 
 		// Give up: we simply couldn't determine what this thing is.
 		// But since we managed to read this file, mark this file in the cache as unknown.
@@ -122,9 +122,9 @@ Thumbnailer::Thumbnail Thumbnailer::fetchImage(const QString &urlfilename, const
 		// to treat requests from other threads. invokeMethod() is Qt's way of calling a
 		// function in a different thread, namely the thread the called object is associated to.
 		QMetaObject::invokeMethod(ImageDownloader::instance(), "load", Qt::AutoConnection, Q_ARG(QUrl, url), Q_ARG(QString, originalFilename));
-		return { QImage(), MEDIATYPE_STILL_LOADING, zero_duration };
+		return { QImage(), MEDIATYPE_STILL_LOADING, duration_t() };
 	}
-	return { QImage(), MEDIATYPE_IO_ERROR, zero_duration };
+	return { QImage(), MEDIATYPE_IO_ERROR, duration_t() };
 }
 
 // Fetch a picture based on its original filename. If there is a translated filename (obtained either
@@ -140,7 +140,7 @@ Thumbnailer::Thumbnail Thumbnailer::getHashedImage(const QString &filename, bool
 	// If there is a translated filename, try that first.
 	// Note that we set the default type to io-error, so that if we didn't try
 	// the local filename first, we will load the file from the canonical filename.
-	Thumbnail thumbnail { QImage(), MEDIATYPE_IO_ERROR, zero_duration };
+	Thumbnail thumbnail { QImage(), MEDIATYPE_IO_ERROR, duration_t() };
 	if (localFilename != filename)
 		thumbnail = fetchImage(localFilename, filename, tryDownload);
 
@@ -187,7 +187,7 @@ Thumbnailer::Thumbnail Thumbnailer::getPictureThumbnailFromStream(QDataStream &s
 {
 	QImage res;
 	stream >> res;
-	return { std::move(res), MEDIATYPE_PICTURE, zero_duration };
+	return { std::move(res), MEDIATYPE_PICTURE, duration_t() };
 }
 
 void Thumbnailer::markVideoThumbnail(QImage &img)
@@ -210,7 +210,7 @@ Thumbnailer::Thumbnail Thumbnailer::getVideoThumbnailFromStream(QDataStream &str
 	// Likewise test the duration and number of pictures for sanity (no videos longer than 10 h,
 	// no more than 10000 pictures).
 	if (stream.status() != QDataStream::Ok || duration > 36000 || numPics > 10000)
-		return { QImage(), MEDIATYPE_VIDEO, zero_duration };
+		return { QImage(), MEDIATYPE_VIDEO, duration_t() };
 
 	// If the file didn't contain an image, but user turned on thumbnail extraction, schedule thumbnail
 	// for extraction. TODO: save failure to extract thumbnails to disk so that thumbnailing
@@ -240,7 +240,7 @@ Thumbnailer::Thumbnail Thumbnailer::getThumbnailFromCache(const QString &picture
 {
 	QString filename = thumbnailFileName(picture_filename);
 	if (filename.isEmpty())
-		return { QImage(), MEDIATYPE_UNKNOWN, zero_duration };
+		return { QImage(), MEDIATYPE_UNKNOWN, duration_t() };
 	QFile file(filename);
 
 	if (prefs.auto_recalculate_thumbnails) {
@@ -254,13 +254,13 @@ Thumbnailer::Thumbnail Thumbnailer::getThumbnailFromCache(const QString &picture
 			if (pictureTime.isValid() && thumbnailTime.isValid() && thumbnailTime < pictureTime) {
 				// Both files exist, have valid timestamps and thumbnail was calculated before picture.
 				// Return an empty thumbnail to signal recalculation of the thumbnail
-				return { QImage(), MEDIATYPE_UNKNOWN, zero_duration };
+				return { QImage(), MEDIATYPE_UNKNOWN, duration_t() };
 			}
 		}
 	}
 
 	if (!file.open(QIODevice::ReadOnly))
-		return { QImage(), MEDIATYPE_UNKNOWN, zero_duration };
+		return { QImage(), MEDIATYPE_UNKNOWN, duration_t() };
 	QDataStream stream(&file);
 
 	// Each thumbnail file is composed of a media-type and an image file.
@@ -271,8 +271,8 @@ Thumbnailer::Thumbnail Thumbnailer::getThumbnailFromCache(const QString &picture
 	switch (type) {
 	case MEDIATYPE_PICTURE:	return getPictureThumbnailFromStream(stream);
 	case MEDIATYPE_VIDEO:	return getVideoThumbnailFromStream(stream, picture_filename);
-	case MEDIATYPE_UNKNOWN:	return { unknownImage, MEDIATYPE_UNKNOWN, zero_duration };
-	default:		return { QImage(), MEDIATYPE_UNKNOWN, zero_duration };
+	case MEDIATYPE_UNKNOWN:	return { unknownImage, MEDIATYPE_UNKNOWN, duration_t() };
+	default:		return { QImage(), MEDIATYPE_UNKNOWN, duration_t() };
 	}
 }
 
@@ -319,7 +319,7 @@ Thumbnailer::Thumbnail Thumbnailer::fetchVideoThumbnail(const QString &filename,
 		return { videoImage, MEDIATYPE_VIDEO, duration };
 	} else {
 		// Video-thumbnailing is disabled. Write a thumbnail without picture.
-		return addVideoThumbnailToCache(originalFilename, duration, QImage(), zero_duration);
+		return addVideoThumbnailToCache(originalFilename, duration, QImage(), duration_t());
 	}
 }
 
@@ -337,7 +337,7 @@ Thumbnailer::Thumbnail Thumbnailer::addPictureThumbnailToCache(const QString &pi
 		stream << thumbnail;
 		file.commit();
 	}
-	return { thumbnail, MEDIATYPE_PICTURE, zero_duration };
+	return { thumbnail, MEDIATYPE_PICTURE, duration_t() };
 }
 
 Thumbnailer::Thumbnail Thumbnailer::addUnknownThumbnailToCache(const QString &picture_filename)
@@ -348,7 +348,7 @@ Thumbnailer::Thumbnail Thumbnailer::addUnknownThumbnailToCache(const QString &pi
 		QDataStream stream(&file);
 		stream << (quint32)MEDIATYPE_UNKNOWN;
 	}
-	return { unknownImage, MEDIATYPE_UNKNOWN, zero_duration };
+	return { unknownImage, MEDIATYPE_UNKNOWN, duration_t() };
 }
 
 void Thumbnailer::frameExtracted(QString filename, QImage thumbnail, duration_t duration, duration_t offset)
@@ -374,7 +374,7 @@ void Thumbnailer::frameExtractionFailed(QString filename, duration_t duration)
 {
 	// Frame extraction failed, but this was due to ffmpeg not starting
 	// add to the thumbnail cache as a video image with unknown thumbnail.
-	addVideoThumbnailToCache(filename, duration, QImage(), zero_duration);
+	addVideoThumbnailToCache(filename, duration, QImage(), duration_t());
 	QMutexLocker l(&lock);
 	workingOn.remove(filename);
 }
@@ -435,7 +435,7 @@ void Thumbnailer::imageDownloaded(QString filename)
 
 void Thumbnailer::imageDownloadFailed(QString filename)
 {
-	emit thumbnailChanged(filename, failImage, zero_duration);
+	emit thumbnailChanged(filename, failImage, duration_t());
 	QMutexLocker l(&lock);
 	workingOn.remove(filename);
 }

core/import-csv.cpp

@@ -497,7 +497,7 @@ int parse_txt_file(const char *filename, const char *csv, struct divelog *log)
 		bool has_depth = false, has_setpoint = false, has_ndl = false;
 		char *lineptr;
 		int prev_time = 0;
-		cylinder_t cyl = empty_cylinder;
+		cylinder_t cyl;
 
 		struct dive *dive;
 		struct divecomputer *dc;

core/libdivecomputer.cpp

@@ -168,7 +168,7 @@ static dc_status_t parse_gasmixes(device_data_t *devdata, struct dive *dive, dc_
 
 	clear_cylinder_table(&dive->cylinders);
 	for (i = 0; i < std::max(ngases, ntanks); i++) {
-		cylinder_t cyl = empty_cylinder;
+		cylinder_t cyl;
 		cyl.cylinder_use = NOT_USED;
 
 		if (i < ngases) {

core/liquivision.cpp

@@ -149,7 +149,7 @@ static void parse_dives(int log_version, const unsigned char *buf, unsigned int
 
 		/* Just the main cylinder until we can handle the buddy cylinder porperly */
 		for (i = 0; i < 1; i++) {
-			cylinder_t cyl = empty_cylinder;
+			cylinder_t cyl;
 			fill_default_cylinder(dive, &cyl);
 			add_cylinder(&dive->cylinders, i, cyl);
 		}

core/load-git.cpp

@@ -434,7 +434,7 @@ static void parse_cylinder_keyvalue(void *_cylinder, const char *key, const std:
 
 static void parse_dive_cylinder(char *line, struct git_parser_state *state)
 {
-	cylinder_t cylinder = empty_cylinder;
+	cylinder_t cylinder;
 
 	for (;;) {
 		char c;
@@ -795,7 +795,7 @@ static int get_divemode(const char *divemodestring) {
 struct parse_event {
 	std::string name;
 	int has_divemode = false;
-	struct event ev = { 0 };
+	struct event ev;
 };
 
 static void parse_event_keyvalue(void *_parse, const char *key, const std::string &value)

core/owning_ptrs.h

@@ -24,13 +24,9 @@ struct DiveDeleter {
 struct TripDeleter {
 	void operator()(dive_trip *t) { free_trip(t); }
 };
-struct EventDeleter {
-	void operator()(event *ev) { free(ev); }
-};
 
 // Owning pointers to dive, dive_trip, dive_site and event objects.
 using OwningDivePtr = std::unique_ptr<dive, DiveDeleter>;
 using OwningTripPtr = std::unique_ptr<dive_trip, TripDeleter>;
-using OwningEventPtr = std::unique_ptr<event, EventDeleter>;
 
 #endif

core/parse-xml.cpp

@@ -1000,7 +1000,7 @@ static void divinglog_place(const char *place, struct dive *d, struct parser_sta
 static int divinglog_dive_match(struct dive *dive, const char *name, char *buf, struct parser_state *state)
 {
 	/* For cylinder related fields, we might have to create a cylinder first. */
-	cylinder_t cyl = empty_cylinder;
+	cylinder_t cyl;
 	if (MATCH("tanktype", utf8_string, (char **)&cyl.type.description)) {
 		cylinder_t *cyl0 = get_or_create_cylinder(dive, 0);
 		free((void *)cyl0->type.description);

core/parse.cpp

@@ -63,7 +63,7 @@ void nonmatch(const char *type, const char *name, char *buffer)
 
 void event_start(struct parser_state *state)
 {
-	memset(&state->cur_event, 0, sizeof(state->cur_event));
+	state->cur_event = event();
 	state->event_active = true;	/* Active */
 }
 

core/parse.h

@@ -2,8 +2,6 @@
 #ifndef PARSE_H
 #define PARSE_H
 
-#define MAX_EVENT_NAME 128
-
 #include "event.h"
 #include "equipment.h" // for cylinder_t
 #include "extradata.h"
@@ -18,11 +16,6 @@
 struct xml_params;
 struct divelog;
 
-typedef union {
-	struct event event;
-	char allocation[sizeof(struct event) + MAX_EVENT_NAME];
-} event_allocation_t;
-
 /*
  * Dive info as it is being built up..
  */
@@ -63,7 +56,7 @@ struct parser_state {
 	struct divecomputer *cur_dc = nullptr;			/* non-owning */
 	struct dive *cur_dive = nullptr;			/* owning */
 	std::unique_ptr<dive_site> cur_dive_site;		/* owning */
-	location_t cur_location { 0 };
+	location_t cur_location;
 	struct dive_trip *cur_trip = nullptr;			/* owning */
 	struct sample *cur_sample = nullptr;			/* non-owning */
 	struct picture cur_picture { 0 };			/* owning */
@@ -93,13 +86,11 @@ struct parser_state {
 
 	sqlite3 *sql_handle = nullptr;				/* for SQL based parsers */
 	bool event_active = false;
-	event_allocation_t event_allocation;
+	event cur_event;
 	parser_state();
 	~parser_state();
 };
 
-#define cur_event event_allocation.event
-
 void event_start(struct parser_state *state);
 void event_end(struct parser_state *state);
 struct divecomputer *get_dc(struct parser_state *state);

core/picture.h

@@ -10,8 +10,8 @@ struct dive;
 
 struct picture {
 	char *filename = nullptr;
-	offset_t offset = { 0 };
-	location_t location = { { 0 }, { 0 } };
+	offset_t offset;
+	location_t location;
 };
 
 /* loop through all pictures of a dive */

core/planner.cpp

@@ -234,7 +234,7 @@ static void create_dive_from_plan(struct diveplan *diveplan, struct dive *dive,
 	free_samples(dc);
 	while ((ev = dc->events)) {
 		dc->events = dc->events->next;
-		free(ev);
+		delete ev;
 	}
 	dp = diveplan->dp;
 	/* Create first sample at time = 0, not based on dp because

core/profile.h

@@ -7,6 +7,7 @@
 
 #include <memory>
 #include <string>
+#include <array>
 #include <vector>
 
 enum velocity_t {
@@ -32,7 +33,7 @@ struct divecomputer;
  * sensor data for a given cylinder
  */
 struct plot_pressure_data {
-	int data[NUM_PLOT_PRESSURES];
+	std::array<int, NUM_PLOT_PRESSURES> data;
 };
 
 struct plot_data {
@@ -42,8 +43,8 @@ struct plot_data {
 	/* Depth info */
 	int depth = 0;
 	int ceiling = 0;
-	int ceilings[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
-	int percentages[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+	std::array<int, 16> ceilings;
+	std::array<int, 16> percentages;
 	int ndl = 0;
 	int tts = 0;
 	int rbt = 0;
@@ -55,10 +56,10 @@ struct plot_data {
 	int running_sum = 0;
 	struct gas_pressures pressures;
 	// TODO: make pressure_t default to 0
-	pressure_t o2pressure = { 0 };  // for rebreathers, this is consensus measured po2, or setpoint otherwise. 0 for OC.
-	pressure_t o2sensor[MAX_O2_SENSORS] = {{ 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }}; //for rebreathers with several sensors
-	pressure_t o2setpoint = { 0 };
-	pressure_t scr_OC_pO2 = { 0 };
+	pressure_t o2pressure;  // for rebreathers, this is consensus measured po2, or setpoint otherwise. 0 for OC.
+	std::array<pressure_t, MAX_O2_SENSORS> o2sensor; //for rebreathers with several sensors
+	pressure_t o2setpoint;
+	pressure_t scr_OC_pO2;
 	int mod = 0, ead = 0, end = 0, eadd = 0;
 	velocity_t velocity = STABLE;
 	int speed = 0;

core/statistics.cpp

@@ -97,13 +97,6 @@ stats_summary calculate_stats_summary(bool selected_only)
 	int current_month = 0;
 	int prev_month = 0, prev_year = 0;
 	dive_trip_t *trip_ptr = nullptr;
-	//stats_t stats = { 0 };
-
-	//if (divelog.dives->nr > 0) {
-	//	stats.shortest_time.seconds = divelog.dives->dives[0]->duration.seconds;
-	//	stats.min_depth.mm = divelog.dives->dives[0]->maxdepth.mm;
-	//	stats.selection_size = divelog.dives->nr;
-	//}
 
 	stats_summary out;
 
@@ -318,7 +311,7 @@ bool is_cylinder_prot(const struct dive *dive, int idx)
 /* Returns a vector with dive->cylinders.nr entries */
 std::vector<volume_t> get_gas_used(struct dive *dive)
 {
-	std::vector<volume_t> gases(dive->cylinders.nr, volume_t { 0 });
+	std::vector<volume_t> gases(dive->cylinders.nr);
 	for (int idx = 0; idx < dive->cylinders.nr; idx++) {
 		cylinder_t *cyl = get_cylinder(dive, idx);
 		pressure_t start, end;
@@ -351,7 +344,7 @@ std::pair<volume_t, volume_t> selected_dives_gas_parts()
 {
 	int i;
 	struct dive *d;
-	volume_t o2_tot = { 0 }, he_tot = { 0 };
+	volume_t o2_tot, he_tot;
 	for_each_dive (i, d) {
 		if (!d->selected || d->invalid)
 			continue;

core/statistics.h

@@ -24,25 +24,25 @@ struct dive;
 struct stats_t
 {
 	int period = 0;
-	duration_t total_time = { 0 };
+	duration_t total_time ;
 	/* total time of dives with non-zero average depth */
-	duration_t total_average_depth_time = { 0 };
+	duration_t total_average_depth_time;
 	/* avg_time is simply total_time / nr -- let's not keep this */
-	duration_t shortest_time = { 0 };
-	duration_t longest_time = { 0 };
-	depth_t max_depth = { 0 };
-	depth_t min_depth = { 0 };
-	depth_t avg_depth = { 0 };
-	depth_t combined_max_depth = { 0 };
-	volume_t max_sac = { 0 };
-	volume_t min_sac = { 0 };
-	volume_t avg_sac = { 0 };
-	temperature_t max_temp = { 0 };
-	temperature_t min_temp = { 0 };
-	temperature_sum_t combined_temp = { 0 };
+	duration_t shortest_time;
+	duration_t longest_time;
+	depth_t max_depth;
+	depth_t min_depth;
+	depth_t avg_depth;
+	depth_t combined_max_depth;
+	volume_t max_sac;
+	volume_t min_sac;
+	volume_t avg_sac;
+	temperature_t max_temp;
+	temperature_t min_temp;
+	temperature_sum_t combined_temp;
 	unsigned int combined_count = 0;
 	unsigned int selection_size = 0;
-	duration_t total_sac_time = { 0 };
+	duration_t total_sac_time;
 	bool is_year = false;
 	bool is_trip = false;
 	std::string location;

core/units.h

@@ -69,54 +69,52 @@ typedef int64_t timestamp_t;
 
 typedef struct
 {
-	int32_t seconds; // durations up to 34 yrs
+	int32_t seconds = 0; // durations up to 34 yrs
 } duration_t;
 
-static const duration_t zero_duration = { 0 };
-
 typedef struct
 {
-	int32_t seconds; // offsets up to +/- 34 yrs
+	int32_t seconds = 0; // offsets up to +/- 34 yrs
 } offset_t;
 
 typedef struct
 {
-	int32_t mm;
+	int32_t mm = 0;
 } depth_t; // depth to 2000 km
 
 typedef struct
 {
-	int32_t mbar; // pressure up to 2000 bar
+	int32_t mbar = 0; // pressure up to 2000 bar
 } pressure_t;
 
 typedef struct
 {
-	uint16_t mbar;
+	uint16_t mbar = 0;
 } o2pressure_t; // pressure up to 65 bar
 
 typedef struct
 {
-	int16_t degrees;
+	int16_t degrees = 0;
 } bearing_t; // compass bearing
 
 typedef struct
 {
-	uint32_t mkelvin; // up to 4 MK (temperatures in K are always positive)
+	uint32_t mkelvin = 0; // up to 4 MK (temperatures in K are always positive)
 } temperature_t;
 
 typedef struct
 {
-	uint64_t mkelvin; // up to 18446744073 MK (temperatures in K are always positive)
+	uint64_t mkelvin = 0; // up to 18446744073 MK (temperatures in K are always positive)
 } temperature_sum_t;
 
 typedef struct
 {
-	int mliter;
+	int mliter = 0;
 } volume_t;
 
 typedef struct
 {
-	int permille;
+	int permille = 0;
 } fraction_t;
 
 typedef struct
@@ -126,15 +124,13 @@ typedef struct
 
 typedef struct
 {
-	int udeg;
+	int udeg = 0;
 } degrees_t;
 
 typedef struct pos {
 	degrees_t lat, lon;
 } location_t;
 
-static const location_t zero_location = { { 0 }, { 0 }};
-
 extern void parse_location(const char *, location_t *);
 
 static inline bool has_location(const location_t *loc)

core/videoframeextractor.cpp

@@ -70,7 +70,7 @@ void VideoFrameExtractor::processItem(QString originalFilename, QString filename
 
 	// Determine the time where we want to extract the image.
 	// If the duration is < 10 sec, just snap the first frame
-	duration_t position = { 0 };
+	duration_t position;
 	if (duration.seconds > 10) {
 		// We round to second-precision. To be sure that we don't attempt reading past the
 		// video's end, round down by one second.

desktop-widgets/locationinformation.cpp

@@ -217,7 +217,7 @@ static location_t parseGpsText(const QString &text)
 	double lat, lon;
 	if (parseGpsText(text.trimmed(), &lat, &lon))
 		return create_location(lat, lon);
-	return zero_location;
+	return location_t();
 }
 
 // Check if GPS text is parseable
@@ -263,7 +263,7 @@ void LocationInformationWidget::initFields(dive_site *ds)
 		DiveFilter::instance()->startFilterDiveSites(QVector<dive_site *>{ ds });
 		filter_model.invalidate();
 	} else {
-		filter_model.set(0, zero_location);
+		filter_model.set(0, location_t());
 		clearLabels();
 	}
 
@@ -348,7 +348,7 @@ void LocationInformationWidget::reverseGeocode()
 	Command::editDiveSiteTaxonomy(ds, taxonomy);
 }
 
-DiveLocationFilterProxyModel::DiveLocationFilterProxyModel(QObject *) : currentLocation(zero_location)
+DiveLocationFilterProxyModel::DiveLocationFilterProxyModel(QObject *)
 {
 }
 
@@ -669,7 +669,6 @@ void DiveLocationLineEdit::setCurrentDiveSite(struct dive *d)
 		currentLocation = dive_get_gps_location(d);
 	} else {
 		currDs = nullptr;
-		currentLocation = zero_location;
 	}
 	if (!currDs)
 		clear();

desktop-widgets/modeldelegates.cpp

@@ -422,7 +422,7 @@ QWidget *DoubleSpinBoxDelegate::createEditor(QWidget *parent, const QStyleOption
 	return w;
 }
 
-LocationFilterDelegate::LocationFilterDelegate(QObject *) : currentLocation(zero_location)
+LocationFilterDelegate::LocationFilterDelegate(QObject *)
 {
 }
 

desktop-widgets/tab-widgets/TabDiveInformation.cpp

@@ -423,7 +423,7 @@ void TabDiveInformation::on_atmPressVal_editingFinished()
 
 void TabDiveInformation::updateTextBox(int event) // Either the text box has been edited or the pressure type has changed.
 {                                       // Either way this gets a numeric value and puts it on the text box atmPressVal,
-	pressure_t atmpress = { 0 };    // then stores it in dive->surface_pressure.The undo stack for the text box content is
+	pressure_t atmpress;            // then stores it in dive->surface_pressure.The undo stack for the text box content is
 	double altitudeVal;             // maintained even though two independent events trigger saving the text box contents.
 	dive *currentDive = parent.currentDive;
 	if (currentDive) {

mobile-widgets/qmlmanager.cpp

@@ -911,7 +911,7 @@ struct DiveSiteChange {
 	std::unique_ptr<dive_site> createdDs; // not-null if we created a dive site.
 
 	dive_site *editDs = nullptr; // not-null if we are supposed to edit an existing dive site.
-	location_t location = zero_location; // new value of the location if we edit an existing dive site.
+	location_t location; // new value of the location if we edit an existing dive site.
 
 	bool changed = false; // true if either a dive site or the dive was changed.
 };

qt-models/cylindermodel.cpp

@@ -17,8 +17,7 @@ CylindersModel::CylindersModel(bool planner, QObject *parent) : CleanerTableMode
 	dcNr(-1),
 	inPlanner(planner),
 	numRows(0),
-	tempRow(-1),
-	tempCyl(empty_cylinder)
+	tempRow(-1)
 {
 	//	enum {REMOVE, TYPE, SIZE, WORKINGPRESS, START, END, O2, HE, DEPTH, MOD, MND, USE, WORKINGPRESS_INT, SIZE_INT, SENSORS};
 	setHeaderDataStrings(QStringList() << "" << tr("Type") << tr("Size") << tr("Work press.") << tr("Start press.") << tr("End press.") << tr("O₂%") << tr("He%")

qt-models/diveplannermodel.cpp

@@ -122,9 +122,9 @@ void DivePlannerPointsModel::loadFromDive(dive *dIn, int dcNrIn)
 	const struct event *evd = NULL;
 	enum divemode_t current_divemode = UNDEF_COMP_TYPE;
 	cylinders.updateDive(d, dcNr);
-	duration_t lasttime = { 0 };
-	duration_t lastrecordedtime = {};
-	duration_t newtime = {};
+	duration_t lasttime;
+	duration_t lastrecordedtime;
+	duration_t newtime;
 
 	clear();
 	removeDeco();