Dive information: fix surface interval calculation

The old surface interval calculation had fundamental issues:

1) process_all_dives(), which calculates the statistics over *all*
   dives was used to get the pointer to the previous dive.
2) If two dives in the table had the same time, one of those would
   have been considered the "previous" dive.
3) If the dive, for which the surface interval is calculated is
   not yet in the table, no previous dive would be determined.

Fix all this by creating a get_surface_interval() function and
removing the "get previous dive" functionality of process_all_dives().
Remove the process_all_dives() call from TabDiveInformation::updateData().

Reported-by: Jan Mulder <jlmulder@xs4all.nl>
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

1 files changed, 1 insertions, 5 deletions

diff --git a/export-html.cpp b/export-html.cpp
index f66bd6909..fecbb5235 100644
--- a/export-html.cpp
+++ b/export-html.cpp
@@ -54,11 +54,7 @@ int main(int argc, char **argv)
 	prefs.units = git_prefs.units;
 
 	// populate the statistics
-	struct dive *d = get_dive(0);
-	struct dive *pd;
-	if (d) {
-		process_all_dives(d, &pd);
-	}
+	process_all_dives();
 
 	// now set up the export settings to create the HTML export
 	struct htmlExportSetting hes;