Add small helper to determine if dive computer has HR data

Currently unused, but requested for a future feature.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

2 files changed, 18 insertions, 1 deletions

diff --git a/dive.c b/dive.c
index 48fd020ef..4a9766483 100644
--- a/dive.c
+++ b/dive.c
@@ -199,6 +199,21 @@ double get_weight_units(unsigned int grams, int *frac, const char **units)
 	return value;
 }
 
+bool has_hr_data(struct divecomputer *dc)
+{
+	int i;
+	struct sample *sample;
+
+	if (!dc)
+		return false;
+
+	sample = dc->sample;
+	for (i = 0; i < dc->samples; i++)
+		if (sample[i].heartbeat)
+			return true;
+	return false;
+}
+
 struct dive *alloc_dive(void)
 {
 	struct dive *dive;
@@ -2202,4 +2217,4 @@ void set_userid(char *rUserId)
 	if (prefs.userid && rUserId)
 		strcpy(prefs.userid, rUserId);
 }
-#undef MAX_USERID_SIZE
\ No newline at end of file
+#undef MAX_USERID_SIZE
diff --git a/dive.h b/dive.h
index be81ca44b..8713d8c67 100644
--- a/dive.h
+++ b/dive.h
@@ -743,6 +743,8 @@ extern void record_dive(struct dive *dive);
 extern struct sample *prepare_sample(struct divecomputer *dc);
 extern void finish_sample(struct divecomputer *dc);
 
+extern bool has_hr_data(struct divecomputer *dc);
+
 extern void sort_table(struct dive_table *table);
 extern struct dive *fixup_dive(struct dive *dive);
 extern int getUniqID(struct dive *d);