/* It is the caller's responsibility to avoid duplicate names, if that is
* desirable. */
struct shash_node *
-shash_add(struct shash *sh, const char *name, void *data)
+shash_add(struct shash *sh, const char *name, const void *data)
{
struct shash_node *node = xmalloc(sizeof *node);
node->name = xstrdup(name);
- node->data = data;
+ node->data = (void *) data;
hmap_insert(&sh->map, &node->node, hash_name(name));
return node;
}
+bool
+shash_add_once(struct shash *sh, const char *name, const void *data)
+{
+ if (!shash_find(sh, name)) {
+ shash_add(sh, name, data);
+ return true;
+ } else {
+ return false;
+ }
+}
+
void
shash_delete(struct shash *sh, struct shash_node *node)
{