[PATCH] Do per cylinder statistics

[Anton Lundin]

This shows how much gas form each cylinder was used. I would like to add
SAC to that list too but it became a mess trying to calculate average
depth per cylinder.

Design based on idea in #284

Signed-off-by: Anton Lundin <glance at acc.umu.se>
---
 qt-ui/maintab.cpp |  7 ++++++-
 statistics.c      | 19 +++++++++++--------
 statistics.h      |  2 +-
 3 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/qt-ui/maintab.cpp b/qt-ui/maintab.cpp
index 16c0a1f..cf3cbbc 100644
--- a/qt-ui/maintab.cpp
+++ b/qt-ui/maintab.cpp
@@ -349,7 +349,12 @@ void MainTab::updateDiveInfo(int dive)
 		ui.otuText->setText(QString("%1").arg(d->otu));
 		ui.waterTemperatureText->setText(get_temperature_string(d->watertemp, TRUE));
 		ui.airTemperatureText->setText(get_temperature_string(d->airtemp, TRUE));
-		ui.gasUsedText->setText(get_volume_string(get_gas_used(d), TRUE));
+		volume_t gases[MAX_CYLINDERS] = { 0 };
+		get_gas_used(d, gases);
+		QString volumes = get_volume_string(gases[0], TRUE);
+		for(int i=1; i < MAX_CYLINDERS && gases[i].mliter != 0; i++)
+			volumes.append("\n" + get_volume_string(gases[i], TRUE));
+		ui.gasUsedText->setText(volumes);
 		ui.oxygenHeliumText->setText(get_gaslist(d));
 		ui.dateText->setText(get_short_dive_date_string(d->when));
 		ui.diveTimeText->setText(QString::number((int)((d->duration.seconds + 30) / 60)));
diff --git a/statistics.c b/statistics.c
index a151aee..8284dda 100644
--- a/statistics.c
+++ b/statistics.c
@@ -268,7 +268,7 @@ void get_selected_dives_text(char *buffer, int size)
 	}
 }
 
-volume_t get_gas_used(struct dive *dive)
+void get_gas_used(struct dive *dive, volume_t gases[MAX_CYLINDERS])
 {
 	int idx;
 	volume_t gas_used = { 0 };
@@ -279,9 +279,8 @@ volume_t get_gas_used(struct dive *dive)
 		start = cyl->start.mbar ? cyl->start : cyl->sample_start;
 		end = cyl->end.mbar ? cyl->end : cyl->sample_end;
 		if (start.mbar && end.mbar)
-			gas_used.mliter += gas_volume(cyl, start) - gas_volume(cyl, end);
+			gases[idx].mliter = gas_volume(cyl, start) - gas_volume(cyl, end);
 	}
-	return gas_used;
 }
 
 bool is_gas_used(struct dive *dive, int idx)
@@ -347,15 +346,19 @@ char *get_gaslist(struct dive *dive)
 		cyl = &dive->cylinder[idx];
 		o2 = get_o2(&cyl->gasmix);
 		he = get_he(&cyl->gasmix);
+		if (offset > 0) {
+			strncpy(buf + offset, "\n", MAXBUF - offset);
+			offset = strlen(buf);
+		}
 		if (is_air(o2, he))
-			snprintf(buf + offset, MAXBUF - offset, (offset > 0) ? ", %s" : "%s", translate("gettextFromC","air"));
+			strncpy(buf + offset, translate("gettextFromC","air"), MAXBUF - offset);
 		else
 			if (he == 0)
-				snprintf(buf + offset, MAXBUF - offset, (offset > 0) ? translate("gettextFromC",", EAN%d") : translate("gettextFromC","EAN%d"),
-					 (o2 + 5) / 10);
+				snprintf(buf + offset, MAXBUF - offset,
+					translate("gettextFromC","EAN%d"), (o2 + 5) / 10);
 			else
-				snprintf(buf + offset, MAXBUF - offset, (offset > 0) ? ", %d/%d" : "%d/%d",
-				 (o2 + 5) / 10, (he + 5) / 10);
+				snprintf(buf + offset, MAXBUF - offset,
+					"%d/%d", (o2 + 5) / 10, (he + 5) / 10);
 		offset = strlen(buf);
 	}
 	if (*buf == '\0')
diff --git a/statistics.h b/statistics.h
index d5d373d..47fd24d 100644
--- a/statistics.h
+++ b/statistics.h
@@ -40,7 +40,7 @@ extern char *get_time_string(int seconds, int maxdays);
 extern char *get_minutes(int seconds);
 extern void process_all_dives(struct dive *dive, struct dive **prev_dive);
 extern void get_selected_dives_text(char *buffer, int size);
-extern volume_t get_gas_used(struct dive *dive);
+extern void get_gas_used(struct dive *dive, volume_t gases[MAX_CYLINDERS]);
 extern char *get_gaslist(struct dive *dive);
 extern void process_selected_dives(void);
 
-- 
1.8.3.2