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-rw-r--r--qobject/block-qdict.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/qobject/block-qdict.c b/qobject/block-qdict.c
index 80c653013f..42054cc274 100644
--- a/qobject/block-qdict.c
+++ b/qobject/block-qdict.c
@@ -158,20 +158,25 @@ void qdict_flatten(QDict *qdict)
qdict_flatten_qdict(qdict, qdict, NULL);
}
-/* extract all the src QDict entries starting by start into dst */
+/* extract all the src QDict entries starting by start into dst.
+ * If dst is NULL then the entries are simply removed from src. */
void qdict_extract_subqdict(QDict *src, QDict **dst, const char *start)
{
const QDictEntry *entry, *next;
const char *p;
- *dst = qdict_new();
+ if (dst) {
+ *dst = qdict_new();
+ }
entry = qdict_first(src);
while (entry != NULL) {
next = qdict_next(src, entry);
if (strstart(entry->key, start, &p)) {
- qdict_put_obj(*dst, p, qobject_ref(entry->value));
+ if (dst) {
+ qdict_put_obj(*dst, p, qobject_ref(entry->value));
+ }
qdict_del(src, entry->key);
}
entry = next;