core: use C++ structures for weightsystem info

Use std::vector<> instead of fixed size array.
Doesn't do any logic change, even though the back-translation
logic is ominous.

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

commands/command_edit.cpp

@@ -1079,12 +1079,12 @@ EditWeight::EditWeight(int index, weightsystem_t wsIn, bool currentDiveOnly) :
 	// Try to untranslate the weightsystem name
 	new_ws = clone_weightsystem(wsIn);
 	QString vString(new_ws.description);
-	for (int i = 0; i < MAX_WS_INFO && ws_info[i].name; ++i) {
-		if (gettextFromC::tr(ws_info[i].name) == vString) {
-			free_weightsystem(new_ws);
-			new_ws.description = copy_string(ws_info[i].name);
-			break;
-		}
+	auto it = std::find_if(ws_info_table.begin(), ws_info_table.end(),
+			       [&vString](const ws_info &info)
+			       { return gettextFromC::tr(info.name.c_str()) == vString; });
+	if (it != ws_info_table.end()) {
+		free_weightsystem(new_ws);
+		new_ws.description = strdup(it->name.c_str());
 	}
 
 	// If that doesn't change anything, do nothing
@@ -1102,7 +1102,7 @@ EditWeight::~EditWeight()
 void EditWeight::redo()
 {
 	for (size_t i = 0; i < dives.size(); ++i) {
-		add_weightsystem_description(&new_ws); // This updates the weightsystem info table
+		add_weightsystem_description(new_ws); // This updates the weightsystem info table
 		set_weightsystem(dives[i], indices[i], new_ws);
 		emit diveListNotifier.weightEdited(dives[i], indices[i]);
 		invalidate_dive_cache(dives[i]); // Ensure that dive is written in git_save()

core/dive.cpp

@@ -1298,7 +1298,7 @@ extern "C" struct dive *fixup_dive(struct dive *dive)
 	}
 	update_cylinder_related_info(dive);
 	for (i = 0; i < dive->weightsystems.nr; i++) {
-		weightsystem_t *ws = &dive->weightsystems.weightsystems[i];
+		const weightsystem_t &ws = dive->weightsystems.weightsystems[i];
 		add_weightsystem_description(ws);
 	}
 	/* we should always have a uniq ID as that gets assigned during alloc_dive(),

core/equipment.cpp

@@ -169,36 +169,28 @@ extern "C" void add_cylinder_description(const cylinder_type_t *type)
 			     type->workingpressure.mbar / 1000);
 }
 
-extern "C" void add_weightsystem_description(const weightsystem_t *weightsystem)
+void add_weightsystem_description(const weightsystem_t &weightsystem)
 {
-	const char *desc;
-	int i;
-
-	desc = weightsystem->description;
-	if (!desc)
+	if (empty_string(weightsystem.description))
+		return;
+
+	auto it = std::find_if(ws_info_table.begin(), ws_info_table.end(),
+			       [&weightsystem](const ws_info &info)
+			       { return info.name == weightsystem.description; });
+	if (it != ws_info_table.end()) {
+		it->weight = weightsystem.weight;
 		return;
-	for (i = 0; i < MAX_WS_INFO && ws_info[i].name != NULL; i++) {
-		if (same_string(ws_info[i].name, desc)) {
-			ws_info[i].grams = weightsystem->weight.grams;
-			return;
-		}
-	}
-	if (i < MAX_WS_INFO) {
-		// FIXME: leaked on exit
-		ws_info[i].name = strdup(desc);
-		ws_info[i].grams = weightsystem->weight.grams;
 	}
+	ws_info_table.push_back(ws_info { std::string(weightsystem.description), weightsystem.weight });
 }
 
-extern "C" struct ws_info_t *get_weightsystem_description(const char *name)
+weight_t get_weightsystem_weight(const std::string &name)
 {
-	for (int i = 0; i < MAX_WS_INFO && ws_info[i].name != NULL; i++) {
-		// Also finds translated names (TODO: should only consider non-user items).
-		if (same_string(ws_info[i].name, name) ||
-		    same_string(translate("gettextFromC", ws_info[i].name), name))
-			return &ws_info[i];
-	}
-	return NULL;
+	// Also finds translated names (TODO: should only consider non-user items).
+	auto it = std::find_if(ws_info_table.begin(), ws_info_table.end(),
+			       [&name](const ws_info &info)
+			       { return info.name == name || translate("gettextFromC", info.name.c_str()) == name; });
+	return it != ws_info_table.end() ? it->weight : weight_t();
 }
 
 extern "C" weightsystem_t clone_weightsystem(weightsystem_t ws)
@@ -370,12 +362,12 @@ extern "C" void reset_tank_info_table(struct tank_info_table *table)
  * We hardcode the most common weight system types
  * This is a bit odd as the weight system types don't usually encode weight
  */
-struct ws_info_t ws_info[MAX_WS_INFO] = {
-	{ QT_TRANSLATE_NOOP("gettextFromC", "integrated"), 0 },
-	{ QT_TRANSLATE_NOOP("gettextFromC", "belt"), 0 },
-	{ QT_TRANSLATE_NOOP("gettextFromC", "ankle"), 0 },
-	{ QT_TRANSLATE_NOOP("gettextFromC", "backplate"), 0 },
-	{ QT_TRANSLATE_NOOP("gettextFromC", "clip-on"), 0 },
+struct std::vector<ws_info> ws_info_table = {
+	{ QT_TRANSLATE_NOOP("gettextFromC", "integrated"), weight_t() },
+	{ QT_TRANSLATE_NOOP("gettextFromC", "belt"), weight_t() },
+	{ QT_TRANSLATE_NOOP("gettextFromC", "ankle"), weight_t() },
+	{ QT_TRANSLATE_NOOP("gettextFromC", "backplate"), weight_t() },
+	{ QT_TRANSLATE_NOOP("gettextFromC", "clip-on"), weight_t() },
 };
 
 extern "C" void remove_cylinder(struct dive *dive, int idx)

core/equipment.h

@@ -68,8 +68,6 @@ struct weightsystem_table {
 	weightsystem_t *weightsystems;
 };
 
-#define MAX_WS_INFO (100)
-
 extern enum cylinderuse cylinderuse_from_text(const char *text);
 extern void copy_weights(const struct weightsystem_table *s, struct weightsystem_table *d);
 extern void copy_cylinders(const struct cylinder_table *s, struct cylinder_table *d);
@@ -84,7 +82,6 @@ extern void add_cloned_cylinder(struct cylinder_table *t, cylinder_t cyl);
 extern cylinder_t *get_cylinder(const struct dive *d, int idx);
 extern cylinder_t *get_or_create_cylinder(struct dive *d, int idx);
 extern void add_cylinder_description(const cylinder_type_t *);
-extern void add_weightsystem_description(const weightsystem_t *);
 extern bool same_weightsystem(weightsystem_t w1, weightsystem_t w2);
 extern void remove_cylinder(struct dive *dive, int idx);
 extern void remove_weightsystem(struct dive *dive, int idx);
@@ -130,15 +127,21 @@ extern void extract_tank_info(const struct tank_info *info, volume_t *size, pres
 extern bool get_tank_info_data(struct tank_info_table *table, const char *name, volume_t *size, pressure_t *pressure);
 extern void set_tank_info_data(struct tank_info_table *table, const char *name, volume_t size, pressure_t working_pressure);
 
-struct ws_info_t {
-	const char *name;
-	int grams;
-};
-extern struct ws_info_t ws_info[MAX_WS_INFO];
-extern struct ws_info_t *get_weightsystem_description(const char *name);
-
 #ifdef __cplusplus
 }
+
+#include <memory>
+#include <string>
+#include <vector>
+
+struct ws_info {
+	std::string name;
+	weight_t weight;
+};
+extern std::vector<ws_info> ws_info_table;
+extern weight_t get_weightsystem_weight(const std::string &name); // returns 0 if not found
+extern void add_weightsystem_description(const weightsystem_t &);
+
 #endif
 
 #endif // EQUIPMENT_H

core/units.h

@@ -131,7 +131,11 @@ typedef struct
 
 typedef struct
 {
+#ifdef __cplusplus
+	int grams = 0;
+#else
 	int grams;
+#endif
 } weight_t;
 
 typedef struct

desktop-widgets/modeldelegates.cpp

@@ -339,10 +339,9 @@ void WSInfoDelegate::setModelData(QWidget *, QAbstractItemModel *, const QModelI
 {
 	WeightModel *mymodel = qobject_cast<WeightModel *>(currCombo.model);
 	QString weightName = currCombo.activeText;
-	ws_info_t *info = get_weightsystem_description(qPrintable(weightName));
-	int grams = info ? info->grams : 0;
+	weight_t weight = get_weightsystem_weight(qPrintable(weightName));
 
-	mymodel->setTempWS(currCombo.currRow, weightsystem_t{ { grams }, copy_qstring(weightName), false });
+	mymodel->setTempWS(currCombo.currRow, weightsystem_t{ weight, copy_qstring(weightName), false });
 }
 
 static QAbstractItemModel *createWSInfoModel(QWidget *parent)

qt-models/weightsysteminfomodel.cpp

@@ -1,17 +1,15 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "qt-models/weightsysteminfomodel.h"
-#include "core/subsurface-qt/divelistnotifier.h"
-#include "core/dive.h"
+#include "core/equipment.h"
 #include "core/metrics.h"
 #include "core/gettextfromc.h"
 
 QVariant WSInfoModel::data(const QModelIndex &index, int role) const
 {
-	if (!index.isValid() || index.row() >= rows)
+	if (index.row() < 0 || index.row() >= static_cast<int>(ws_info_table.size()))
 		return QVariant();
-	struct ws_info_t *info = &ws_info[index.row()];
+	const ws_info &info = ws_info_table[index.row()];
 
-	int gr = info->grams;
 	switch (role) {
 	case Qt::FontRole:
 		return defaultModelFont();
@@ -19,9 +17,10 @@ QVariant WSInfoModel::data(const QModelIndex &index, int role) const
 	case Qt::EditRole:
 		switch (index.column()) {
 		case GR:
-			return gr;
+			return info.weight.grams;
 		case DESCRIPTION:
-			return gettextFromC::tr(info->name);
+			// TODO: don't translate user supplied names
+			return gettextFromC::tr(info.name.c_str());
 		}
 		break;
 	}
@@ -30,13 +29,5 @@ QVariant WSInfoModel::data(const QModelIndex &index, int role) const
 
 int WSInfoModel::rowCount(const QModelIndex&) const
 {
-	return rows;
-}
-
-WSInfoModel::WSInfoModel(QObject *parent) : CleanerTableModel(parent)
-{
-	setHeaderDataStrings(QStringList() << tr("Description") << tr("kg"));
-	rows = 0;
-	for (struct ws_info_t *info = ws_info; info->name && info < ws_info + MAX_WS_INFO; info++, rows++)
-		;
+	return static_cast<int>(ws_info_table.size());
 }

qt-models/weightsysteminfomodel.h

@@ -12,13 +12,10 @@ public:
 		DESCRIPTION,
 		GR
 	};
-	WSInfoModel(QObject *parent);
+	using CleanerTableModel::CleanerTableModel;
 
-	QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+	QVariant data(const QModelIndex &index, int role) const override;
 	int rowCount(const QModelIndex &parent = QModelIndex()) const override;
-
-private:
-	int rows;
 };
 
 #endif