From f448b68de0e844db3628332ebf70f2746882527c Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 4 Sep 2011 13:06:47 -0700
Subject: [PATCH] Clean up 'fixup_dive()' a bit

We don't want to override potentially more exact values for water
temperature etc either.  The sample save interval may be longer than
some internally kept state of key per-dive values like that.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 dive.c | 54 ++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 40 insertions(+), 14 deletions(-)

diff --git a/dive.c b/dive.c
index 5ddb6bc..7fe6eb1 100644
--- a/dive.c
+++ b/dive.c
@@ -21,10 +21,38 @@
  */
 static void update_depth(depth_t *depth, int new)
 {
-	int old = depth->mm;
+	if (new) {
+		int old = depth->mm;
 
-	if (abs(old - new) > 1000)
-		depth->mm = new;
+		if (abs(old - new) > 1000)
+			depth->mm = new;
+	}
+}
+
+static void update_pressure(pressure_t *pressure, int new)
+{
+	if (new) {
+		int old = pressure->mbar;
+
+		if (abs(old - new) > 1000)
+			pressure->mbar = new;
+	}
+}
+
+static void update_duration(duration_t *duration, int new)
+{
+	if (new)
+		duration->seconds = new;
+}
+
+static void update_temperature(temperature_t *temperature, int new)
+{
+	if (new) {
+		int old = temperature->mkelvin;
+
+		if (abs(old - new) > 1000)
+			temperature->mkelvin = new;
+	}
 }
 
 struct dive *fixup_dive(struct dive *dive)
@@ -85,18 +113,16 @@ struct dive *fixup_dive(struct dive *dive)
 	}
 	if (end < 0)
 		return dive;
-	dive->duration.seconds = end - start;
+
+	update_duration(&dive->duration, end - start);
 	if (start != end)
-		update_depth(&dive->meandepth, depthtime / (end - start));
-	if (startpress)
-		dive->beginning_pressure.mbar = startpress;
-	if (endpress)
-		dive->end_pressure.mbar = endpress;
-	if (mintemp)
-		dive->watertemp.mkelvin = mintemp;
-
-	if (maxdepth)
-		update_depth(&dive->maxdepth, maxdepth);
+		depthtime /= (end - start);
+
+	update_depth(&dive->meandepth, depthtime);
+	update_pressure(&dive->beginning_pressure, startpress);
+	update_pressure(&dive->end_pressure, endpress);
+	update_temperature(&dive->watertemp, mintemp);
+	update_depth(&dive->maxdepth, maxdepth);
 
 	return dive;
 }
-- 
2.43.0