From 69dd62dfd60631ba69201d8a197fde1ece4b4df3 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Mon, 8 Jul 2013 16:14:21 +0200 Subject: qapi: Anonymous unions The discriminator for anonymous unions is the data type. This allows to have a union type that allows both of these: { 'file': 'my_existing_block_device_id' } { 'file': { 'filename': '/tmp/mydisk.qcow2', 'read-only': true } } Unions like this are specified in the schema with an empty dict as discriminator. For this example you could take: { 'union': 'BlockRef', 'discriminator': {}, 'data': { 'definition': 'BlockOptions', 'reference': 'str' } } { 'type': 'ExampleObject', 'data: { 'file': 'BlockRef' } } Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake --- qapi/qmp-input-visitor.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'qapi/qmp-input-visitor.c') diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c index 70864a1af2..bf42c04ea6 100644 --- a/qapi/qmp-input-visitor.c +++ b/qapi/qmp-input-visitor.c @@ -208,6 +208,19 @@ static void qmp_input_end_list(Visitor *v, Error **errp) qmp_input_pop(qiv, errp); } +static void qmp_input_get_next_type(Visitor *v, int *kind, const int *qobjects, + const char *name, Error **errp) +{ + QmpInputVisitor *qiv = to_qiv(v); + QObject *qobj = qmp_input_get_object(qiv, name, false); + + if (!qobj) { + error_set(errp, QERR_MISSING_PARAMETER, name ? name : "null"); + return; + } + *kind = qobjects[qobject_type(qobj)]; +} + static void qmp_input_type_int(Visitor *v, int64_t *obj, const char *name, Error **errp) { @@ -317,6 +330,7 @@ QmpInputVisitor *qmp_input_visitor_new(QObject *obj) v->visitor.type_str = qmp_input_type_str; v->visitor.type_number = qmp_input_type_number; v->visitor.start_optional = qmp_input_start_optional; + v->visitor.get_next_type = qmp_input_get_next_type; qmp_input_push(v, obj, NULL); qobject_incref(obj); -- cgit 1.4.1