cleanup: move formatting of gas type to string-format.cpp

Since the only caller was C++ code, this can be done in
C++ code, which removes memory-management headaches.

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

core/divelist.c

@@ -625,36 +625,6 @@ void update_cylinder_related_info(struct dive *dive)
 	}
 }
 
-#define MAX_GAS_STRING 80
-
-/* callers needs to free the string */
-char *get_dive_gas_string(const struct dive *dive)
-{
-	int o2, he, o2max;
-	char *buffer = malloc(MAX_GAS_STRING);
-
-	if (buffer) {
-		get_dive_gas(dive, &o2, &he, &o2max);
-		o2 = (o2 + 5) / 10;
-		he = (he + 5) / 10;
-		o2max = (o2max + 5) / 10;
-
-		if (he)
-			if (o2 == o2max)
-				snprintf(buffer, MAX_GAS_STRING, "%d/%d", o2, he);
-			else
-				snprintf(buffer, MAX_GAS_STRING, "%d/%d…%d%%", o2, he, o2max);
-		else if (o2)
-			if (o2 == o2max)
-				snprintf(buffer, MAX_GAS_STRING, "%d%%", o2);
-			else
-				snprintf(buffer, MAX_GAS_STRING, "%d…%d%%", o2, o2max);
-		else
-			strcpy(buffer, translate("gettextFromC", "air"));
-	}
-	return buffer;
-}
-
 /* Like strcmp(), but don't crash on null-pointers */
 static int safe_strcmp(const char *s1, const char *s2)
 {

core/divelist.h

@@ -44,7 +44,6 @@ extern void process_imported_dives(struct dive_table *import_table, struct trip_
 				   struct dive_table *dives_to_add, struct dive_table *dives_to_remove,
 				   struct trip_table *trips_to_add, struct dive_site_table *sites_to_add,
 				   struct device_table *devices_to_add);
-extern char *get_dive_gas_string(const struct dive *dive);
 
 extern int dive_table_get_insertion_index(struct dive_table *table, struct dive *dive);
 extern void add_to_dive_table(struct dive_table *table, int idx, struct dive *dive);

core/string-format.cpp

@@ -1,6 +1,7 @@
 #include "string-format.h"
 #include "dive.h"
 #include "divesite.h"
+#include "format.h"
 #include "qthelper.h"
 #include "subsurface-string.h"
 #include "trip.h"
@@ -261,6 +262,29 @@ QString formatDiveDateTime(const dive *d)
 					   localTime.time().toString(prefs.time_format));
 }
 
+QString formatDiveGasString(const dive *d)
+{
+	int o2, he, o2max;
+	get_dive_gas(d, &o2, &he, &o2max);
+	o2 = (o2 + 5) / 10;
+	he = (he + 5) / 10;
+	o2max = (o2max + 5) / 10;
+
+	if (he) {
+		if (o2 == o2max)
+			return qasprintf_loc("%d/%d", o2, he);
+		else
+			return qasprintf_loc("%d/%d…%d%%", o2, he, o2max);
+	} else if (o2) {
+		if (o2 == o2max)
+			return qasprintf_loc("%d%%", o2);
+		else
+			return qasprintf_loc("%d…%d%%", o2, o2max);
+	} else {
+		return gettextFromC::tr("air");
+	}
+}
+
 QString formatDayOfWeek(int day)
 {
 	// I can't wrap my head around the fact that Sunday is the

core/string-format.h

@@ -26,6 +26,7 @@ QString formatDiveGPS(const dive *d);
 QString formatDiveDate(const dive *d);
 QString formatDiveTime(const dive *d);
 QString formatDiveDateTime(const dive *d);
+QString formatDiveGasString(const dive *d);
 QString formatDayOfWeek(int day);
 QString formatMinutes(int seconds);
 QString formatTripTitle(const dive_trip *trip);

qt-models/divetripmodel.cpp

@@ -355,12 +355,7 @@ QVariant DiveTripModelBase::diveData(const struct dive *d, int column, int role)
 		case LOCATION:
 			return QString(get_dive_location(d));
 		case GAS:
-			{
-				char *gas_string = get_dive_gas_string(d);
-				QString ret(gas_string);
-				free(gas_string);
-				return ret;
-			}
+			return formatDiveGasString(d);
 		case NOTES:
 			return QString(d->notes);
 		}