shash: New function shash_first().

diff --git a/lib/shash.c b/lib/shash.c
index 7f69084362fe504572af3db5276b1f75efacbd38..93163727655a02ba633883015d755a4780b99d1d 100644 (file)
--- a/lib/shash.c
+++ b/lib/shash.c
@@ -97,3 +97,11 @@ shash_find_data(const struct shash *sh, const char *name)
     struct shash_node *node = shash_find(sh, name);
     return node ? node->data : NULL;
 }
+
+struct shash_node *
+shash_first(const struct shash *shash)
+{
+    struct hmap_node *node = hmap_first(&shash->map);
+    return node ? CONTAINER_OF(node, struct shash_node, node) : NULL;
+}
+

diff --git a/lib/shash.h b/lib/shash.h
index 469e66e55ddbf8d20c899a93f91544cd62c17489..bcac41b5760d2bac34f856dc2598a5e21805232f 100644 (file)
--- a/lib/shash.h
+++ b/lib/shash.h
@@ -39,5 +39,6 @@ void shash_add(struct shash *, const char *, void *);
 void shash_delete(struct shash *, struct shash_node *);
 struct shash_node *shash_find(const struct shash *, const char *);
 void *shash_find_data(const struct shash *, const char *);
+struct shash_node *shash_first(const struct shash *);
 
 #endif /* shash.h */