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-rw-r--r--statistics.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/statistics.c b/statistics.c
index ee3a5b220..4c6379443 100644
--- a/statistics.c
+++ b/statistics.c
@@ -165,11 +165,14 @@ void show_dive_stats(struct dive *dive)
/* for the O2/He readings just create a list of them */
for (idx = 0; idx < MAX_CYLINDERS; idx++) {
cylinder_t *cyl = &dive->cylinder[idx];
+ unsigned int start, end;
+
+ start = cyl->start.mbar ? : cyl->sample_start.mbar;
+ end = cyl->end.mbar ? : cyl->sample_end.mbar;
/* we assume that every valid cylinder has either a working pressure
* or a size; but for good measure let's also accept cylinders with
* a starting or ending pressure*/
- if (cyl->type.workingpressure.mbar || cyl->type.size.mliter ||
- cyl->start.mbar || cyl->end.mbar) {
+ if (cyl->type.workingpressure.mbar || cyl->type.size.mliter || start || end) {
/* 0% O2 strangely means air, so 21% - I don't like that at all */
int o2 = cyl->gasmix.o2.permille ? : 209;
if (offset > 0) {
@@ -182,9 +185,8 @@ void show_dive_stats(struct dive *dive)
}
/* and if we have size, start and end pressure, we can
* calculate the total gas used */
- if (cyl->type.size.mliter && cyl->start.mbar && cyl->end.mbar)
- gas_used += cyl->type.size.mliter / 1000.0 *
- (cyl->start.mbar - cyl->end.mbar);
+ if (cyl->type.size.mliter && start && end)
+ gas_used += cyl->type.size.mliter / 1000.0 * (start - end);
}
set_label(info_stat_w.o2he, buf);
if (gas_used) {