X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=profile.c;h=d3362432effe11b1e0680e9e131d6f457aa5560d;hb=ed1ce8ebc8590533291a9c5d6460f8d1c9f857dd;hp=7a0eac4975ac9b6e4755e23236407c142f211b24;hpb=6fdeeb8c9f4dafe31aa51e785f535feb8a9df46e;p=ext%2Fsubsurface.git

diff --git a/profile.c b/profile.c
index 7a0eac4..d336243 100644
--- a/profile.c
+++ b/profile.c
@@ -1049,16 +1049,18 @@ static void fill_missing_tank_pressures(struct plot_info *pi, pr_track_t **track
 				/* there may be multiple segments - so
 				 * let's assemble the length */
 				nlist = list;
-				pt = list->pressure_time;
-				while (!nlist->end) {
-					nlist = nlist->next;
-					if (!nlist) {
-						/* oops - we have no end pressure,
-						 * so this means this is a tank without
-						 * gas consumption information */
-						break;
+				if (list) {
+					pt = list->pressure_time;
+					while (!nlist->end) {
+						nlist = nlist->next;
+						if (!nlist) {
+							/* oops - we have no end pressure,
+							 * so this means this is a tank without
+							 * gas consumption information */
+							break;
+						}
+						pt += nlist->pressure_time;
 					}
-					pt += nlist->pressure_time;
 				}
 				if (!nlist) {
 					/* just continue without calculating
@@ -1355,12 +1357,15 @@ void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, stru
 	int nr = dive->samples;
 
 	if (!nr) {
+		/* The dive has no samples, so create a few fake ones.  This assumes an
+		ascent/descent rate of 9 m/min, which is just below the limit for FAST. */
 		int duration = dive->duration.seconds;
 		int maxdepth = dive->maxdepth.mm;
+		int asc_desc_time = dive->maxdepth.mm*60/9000;
 		sample = fake;
-		fake[1].time.seconds = duration * 0.05;
+		fake[1].time.seconds = asc_desc_time;
 		fake[1].depth.mm = maxdepth;
-		fake[2].time.seconds = duration * 0.95;
+		fake[2].time.seconds = duration - asc_desc_time;
 		fake[2].depth.mm = maxdepth;
 		fake[3].time.seconds = duration * 1.00;
 		nr = 4;