QDict: Introduce qdict_get_qdict()

A helper to retrieve a QDict from a QDict.
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

qdict.c

@@ -215,6 +215,19 @@ QList *qdict_get_qlist(const QDict *qdict, const char *key)
     return qobject_to_qlist(qdict_get_obj(qdict, key, QTYPE_QLIST));
 }
 
+/**
+ * qdict_get_qdict(): Get the QDict mapped by 'key'
+ *
+ * This function assumes that 'key' exists and it stores a
+ * QDict object.
+ *
+ * Return QDict mapped by 'key'.
+ */
+QDict *qdict_get_qdict(const QDict *qdict, const char *key)
+{
+    return qobject_to_qdict(qdict_get_obj(qdict, key, QTYPE_QDICT));
+}
+
 /**
  * qdict_get_str(): Get a pointer to the stored string mapped
  * by 'key'

qdict.h

@@ -40,6 +40,7 @@ void qdict_iter(const QDict *qdict,
 int64_t qdict_get_int(const QDict *qdict, const char *key);
 int qdict_get_bool(const QDict *qdict, const char *key);
 QList *qdict_get_qlist(const QDict *qdict, const char *key);
+QDict *qdict_get_qdict(const QDict *qdict, const char *key);
 const char *qdict_get_str(const QDict *qdict, const char *key);
 int64_t qdict_get_try_int(const QDict *qdict, const char *key,
                           int64_t err_value);