3 files changed, 33 insertions, 1 deletions
diff --git a/qobject/Makefile.objs b/qobject/Makefile.objs
index c9ff59c..f7595f5 100644
--- a/qobject/Makefile.objs
+++ b/qobject/Makefile.objs
@@ -1,3 +1,3 @@
-util-obj-y = qint.o qstring.o qdict.o qlist.o qfloat.o qbool.o
+util-obj-y = qnull.o qint.o qstring.o qdict.o qlist.o qfloat.o qbool.o
 util-obj-y += qjson.o json-lexer.o json-streamer.o json-parser.o
 util-obj-y += qerror.o
diff --git a/qobject/qjson.c b/qobject/qjson.c
index f2857c1..846733d 100644
--- a/qobject/qjson.c
+++ b/qobject/qjson.c
@@ -127,6 +127,9 @@ static void to_json_list_iter(QObject *obj, void *opaque)
 static void to_json(const QObject *obj, QString *str, int pretty, int indent)
 {
     switch (qobject_type(obj)) {
+    case QTYPE_QNULL:
+        qstring_append(str, "null");
+        break;
     case QTYPE_QINT: {
         QInt *val = qobject_to_qint(obj);
         char buffer[1024];
diff --git a/qobject/qnull.c b/qobject/qnull.c
new file mode 100644
index 0000000..9873e26
--- /dev/null
+++ b/qobject/qnull.c
@@ -0,0 +1,29 @@
+/*
+ * QNull
+ *
+ * Copyright (C) 2015 Red Hat, Inc.
+ *
+ * Authors:
+ *  Markus Armbruster <armbru@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1
+ * or later.  See the COPYING.LIB file in the top-level directory.
+ */
+
+#include "qemu-common.h"
+#include "qapi/qmp/qobject.h"
+
+static void qnull_destroy_obj(QObject *obj)
+{
+    assert(0);
+}
+
+static const QType qnull_type = {
+    .code = QTYPE_QNULL,
+    .destroy = qnull_destroy_obj,
+};
+
+QObject qnull_ = {
+    .type = &qnull_type,
+    .refcnt = 1,
+};