qapi: New qobject_input_visitor_new_str() for convenience

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1488317230-26248-21-git-send-email-armbru@redhat.com>

include/qapi/qobject-input-visitor.h

@@ -68,4 +68,16 @@ Visitor *qobject_input_visitor_new(QObject *obj);
  */
 Visitor *qobject_input_visitor_new_keyval(QObject *obj);
 
+/*
+ * Create a QObject input visitor for parsing @str.
+ *
+ * If @str looks like JSON, parse it as JSON, else as KEY=VALUE,...
+ * @implied_key applies to KEY=VALUE, and works as in keyval_parse().
+ * On failure, store an error through @errp and return NULL.
+ * On success, return a new QObject input visitor for the parse.
+ */
+Visitor *qobject_input_visitor_new_str(const char *str,
+                                       const char *implied_key,
+                                       Error **errp);
+
 #endif