From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 4 Sep 2011 18:20:27 +0000 (-0700)
Subject: Remove redundant temperature readings
X-Git-Url: http://git.tdb.fi/?p=ext%2Fsubsurface.git;a=commitdiff_plain;h=9961c7f89ce6353609383b16b9fbf3a30e4d8604

Remove redundant temperature readings

I'm aiming to really differentiate in dive log software by making my XML
export files be *clean*, dammit.

That means that we don't have random names, we don't have crazy random
units, and we don't have redundant information.

So when the temperature doesn't change, just don't report it.  That's
already what "no sample" means, just clean things up.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/dive.c b/dive.c
index 8c81a3d..9bac25e 100644
--- a/dive.c
+++ b/dive.c
@@ -37,6 +37,8 @@ struct dive *fixup_dive(struct dive *dive)
 	int starttemp = 0, endtemp = 0;
 	int maxdepth = 0, mintemp = 0;
 	int lastdepth = 0;
+	int lasttemp = 0;
+	temperature_t *redundant_temp = NULL;
 
 	for (i = 0; i < dive->samples; i++) {
 		struct sample *sample = dive->sample + i;
@@ -60,6 +62,21 @@ struct dive *fixup_dive(struct dive *dive)
 				startpress = press;
 		}
 		if (temp) {
+			/*
+			 * If we have consecutive identical
+			 * temperature readings, throw away
+			 * the redundant ones. We care about
+			 * the "edges" only.
+			 */
+			if (lasttemp == temp) {
+				if (redundant_temp)
+					redundant_temp->mkelvin = 0;
+				redundant_temp = &sample->temperature;
+			} else {
+				redundant_temp = NULL;
+				lasttemp = temp;
+			}
+
 			endtemp = temp;
 			if (!starttemp)
 				starttemp = temp;