Add support for MOD, EAD, AND and EADD in the mouse over display

- MOD: Maximum Operation Depth based on a configurable limit
- EAD: Equivalent Air Depth considering N2 and (!) O2 narcotic
- END: Equivalent Nitrogen (Narcotic) Depth considering just N2 narcotic
       (ignoring O2)
- EADD: Equivalent Air Density Depth

Please note that some people and even diving organisations have opposite
definitions for EAD and END. Considering A stands for Air, lets choose the
above. And considering N for Nitrogen it also fits in this scheme.

This patch moves N2_IN_AIR from deco.c to dive.h as this is already used
in several places and might be useful for future use also. It also
respecifies N2_IN_AIR to a more correct value of 78,084%, the former one
also included all other gases than oxygen appearing in air. If someone
needs to use the former value it would be more correct to use 1-O2_IN_AIR
instead.

Signed-off-by: Jan Schubert / Jan.Schubert@GMX.li
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/prefs.c b/prefs.c
index b6ae4ee6a..04db63044 100644
--- a/prefs.c
+++ b/prefs.c
@@ -85,6 +85,9 @@ void save_preferences(void)
 	SAVE_DOUBLE("pn2threshold", pp_graphs.pn2_threshold);
 	SAVE_DOUBLE("phethreshold", pp_graphs.phe_threshold);
 
+	SAVE_BOOL("mod", mod);
+	SAVE_DOUBLE("modppO2", mod_ppO2);
+	SAVE_BOOL("ead", ead);
 	SAVE_BOOL("redceiling", profile_red_ceiling);
 	SAVE_BOOL("calcceiling", profile_calc_ceiling);
 	SAVE_BOOL("calcceiling3m", calc_ceiling_3m_incr);
@@ -149,6 +152,13 @@ void load_preferences(void)
 		sscanf(conf_value, "%lf", &prefs.pp_graphs.phe_threshold);
 		free((void *)conf_value);
 	}
+	GET_BOOL("mod", mod);
+	conf_value = subsurface_get_conf("modppO2");
+	if (conf_value) {
+		sscanf(conf_value, "%lf", &prefs.mod_ppO2);
+		free((void *)conf_value);
+	}
+	GET_BOOL("ead", ead);
 	GET_BOOL("redceiling", profile_red_ceiling);
 	GET_BOOL("calcceiling", profile_calc_ceiling);
 	GET_BOOL("calcceiling3m", calc_ceiling_3m_incr);