Add ability to make a dive computer the first dive computer of a dive

If a dive has multiple dive computers we enable a special context menu
when the user right-clicks on the dive computer name AND is not already
showing the first dive computer. In that case we offer to make the
currently shown dive computer the first one.

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

1 files changed, 20 insertions, 0 deletions

diff --git a/dive.c b/dive.c
index 80aa555ee..82d44b41b 100644
--- a/dive.c
+++ b/dive.c
@@ -19,6 +19,26 @@ static const char *default_tags[] = {
 	QT_TRANSLATE_NOOP("gettextFromC", "deco")
 };
 
+void make_first_dc()
+{
+	struct divecomputer *dc = &current_dive->dc;
+	struct divecomputer *newdc = malloc(sizeof(*newdc));
+	struct divecomputer *cur_dc = current_dc; /* needs to be in a local variable so the macro isn't re-executed */
+
+	/* skip the current DC in the linked list */
+	while (dc && dc->next != cur_dc)
+		dc = dc->next;
+	if (!dc) {
+		fprintf(stderr, "data inconsistent: can't find the current DC");
+		return;
+	}
+	dc->next = cur_dc->next;
+	*newdc = current_dive->dc;
+	current_dive->dc = *cur_dc;
+	current_dive->dc.next = newdc;
+	free(cur_dc);
+}
+
 void add_event(struct divecomputer *dc, int time, int type, int flags, int value, const char *name)
 {
 	struct event *ev, **p;