Use unit functions to get column headers, add unit function for pressure

Finally getting more consistent overall in how we convert between the
different units and how we decide which units to display.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/dive.c b/dive.c
index 53a874b9b..cb94e7925 100644
--- a/dive.c
+++ b/dive.c
@@ -29,6 +29,30 @@ void add_event(struct dive *dive, int time, int type, int flags, int value, cons
 	remember_event(name);
 }
 
+int get_pressure_units(unsigned int mb, const char **units)
+{
+	int pressure;
+	const char* unit;
+
+	switch (output_units.pressure) {
+	case PASCAL:
+		pressure = mb * 100;
+		unit = "pascal";
+		break;
+	case BAR:
+		pressure = (mb + 500) / 1000;
+		unit = "bar";
+		break;
+	case PSI:
+		pressure = mbar_to_PSI(mb);
+		unit = "psi";
+		break;
+	}
+	if (units)
+		*units = unit;
+	return pressure;
+}
+
 double get_temp_units(unsigned int mk, const char **units)
 {
 	double deg;