map: introduce map_contains utility function

1 files changed, 5 insertions, 0 deletions

diff --git a/map.c b/map.c
index 9906e42..4e727f4 100644
--- a/map.c
+++ b/map.c
@@ -73,6 +73,11 @@ void *map_closest(const Map *map, const char *prefix)
 	return m->v;
 }
 
+bool map_contains(const Map *map, const char *prefix)
+{
+	return !map_empty(map_prefix(map, prefix));
+}
+
 bool map_put(Map *map, const char *k, const void *value)
 {
 	size_t len = strlen(k);