shash: Introduce new macros SHASH_FOR_EACH, SHASH_FOR_EACH_SAFE.

This is both more convenient and cleaner than using HMAP_FOR_EACH(_SAFE)
directly.

3 files changed, 9 insertions, 2 deletions

diff --git a/lib/shash.c b/lib/shash.c
index f1785139d..7bb8cd70b 100644
--- a/lib/shash.c
+++ b/lib/shash.c
@@ -44,7 +44,7 @@ shash_clear(struct shash *sh)
 {
     struct shash_node *node, *next;
 
-    HMAP_FOR_EACH_SAFE (node, next, struct shash_node, node, &sh->map) {
+    SHASH_FOR_EACH_SAFE (node, next, sh) {
         hmap_remove(&sh->map, &node->node);
         free(node->name);
         free(node);
diff --git a/lib/shash.h b/lib/shash.h
index 72d830200..5794a20f4 100644
--- a/lib/shash.h
+++ b/lib/shash.h
@@ -31,6 +31,13 @@ struct shash {
 
 #define SHASH_INITIALIZER(SHASH) { HMAP_INITIALIZER(&(SHASH)->map) }
 
+#define SHASH_FOR_EACH(SHASH_NODE, SHASH)                               \
+    HMAP_FOR_EACH (SHASH_NODE, struct shash_node, node, &(SHASH)->map)
+
+#define SHASH_FOR_EACH_SAFE(SHASH_NODE, NEXT, SHASH)                \
+    HMAP_FOR_EACH_SAFE (SHASH_NODE, NEXT, struct shash_node, node,  \
+                        &(SHASH)->map)
+
 void shash_init(struct shash *);
 void shash_destroy(struct shash *);
 void shash_clear(struct shash *);
diff --git a/lib/unixctl.c b/lib/unixctl.c
index 526c3fe35..17bd6cb56 100644
--- a/lib/unixctl.c
+++ b/lib/unixctl.c
@@ -82,7 +82,7 @@ unixctl_help(struct unixctl_conn *conn, const char *args UNUSED)
     struct shash_node *node;
 
     ds_put_cstr(&ds, "The available commands are:\n");
-    HMAP_FOR_EACH (node, struct shash_node, node, &commands.map) {
+    SHASH_FOR_EACH (node, &commands) {
         ds_put_format(&ds, "\t%s\n", node->name);
     }
     unixctl_command_reply(conn, 214, ds_cstr(&ds));