Add qdict_clone_shallow()

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

include/qapi/qmp/qdict.h

@@ -64,4 +64,6 @@ int64_t qdict_get_try_int(const QDict *qdict, const char *key,
 int qdict_get_try_bool(const QDict *qdict, const char *key, int def_value);
 const char *qdict_get_try_str(const QDict *qdict, const char *key);
 
+QDict *qdict_clone_shallow(const QDict *src);
+
 #endif /* QDICT_H */

qobject/qdict.c

@@ -400,6 +400,28 @@ const QDictEntry *qdict_next(const QDict *qdict, const QDictEntry *entry)
     return ret;
 }
 
+/**
+ * qdict_clone_shallow(): Clones a given QDict. Its entries are not copied, but
+ * another reference is added.
+ */
+QDict *qdict_clone_shallow(const QDict *src)
+{
+    QDict *dest;
+    QDictEntry *entry;
+    int i;
+
+    dest = qdict_new();
+
+    for (i = 0; i < QDICT_BUCKET_MAX; i++) {
+        QLIST_FOREACH(entry, &src->table[i], next) {
+            qobject_incref(entry->value);
+            qdict_put_obj(dest, entry->key, entry->value);
+        }
+    }
+
+    return dest;
+}
+
 /**
  * qentry_destroy(): Free all the memory allocated by a QDictEntry
  */