bus: allow peeking signatures recusively inside of containers

Previously we invalidated the peeked signature as soon as the caller
would recurse into a container, making stack based handling difficult.
With this change we will keep the peeked signature around until the user
advances to the next field.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/libsystemd-bus/bus-message.h b/src/libsystemd-bus/bus-message.h
index 589c819c73..a973e9fd6c 100644
--- a/src/libsystemd-bus/bus-message.h
+++ b/src/libsystemd-bus/bus-message.h
@@ -48,6 +48,8 @@ struct bus_container {
         /* gvariant: list of offsets to end of children if this is struct/dict entry/array */
         size_t *offsets, n_offsets, offsets_allocated, offset_index;
         size_t item_size;
+
+        char *peeked_signature;
 };
 
 struct bus_header {