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, 7 insertions, 0 deletions

diff --git a/dive.h b/dive.h
index 5eec6f170..fe4515ee6 100644
--- a/dive.h
+++ b/dive.h
@@ -86,6 +86,7 @@ typedef struct {
 	pressure_t start, end;
 } cylinder_t;
 
+extern int get_pressure_units(unsigned int mb, const char **units);
 extern double get_depth_units(unsigned int mm, int *frac, const char **units);
 extern double get_volume_units(unsigned int mm, int *frac, const char **units);
 extern double get_temp_units(unsigned int mm, const char **units);
@@ -146,6 +147,12 @@ static inline double to_ATM(pressure_t pressure)
 	return pressure.mbar / 1013.25;
 }
 
+static inline int mbar_to_PSI(int mbar)
+{
+	pressure_t p = {mbar};
+	return to_PSI(p);
+}
+
 struct sample {
 	duration_t time;
 	depth_t depth;