lib: add notmuch_thread_get_total_files

This is relatively inexpensive in terms of run time and implementation
cost as we are already traversing the list of messages in a thread.

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/notmuch.h b/lib/notmuch.h
index f5018497..4c03a893 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -1097,6 +1097,18 @@ int
 notmuch_thread_get_total_messages (notmuch_thread_t *thread);
 
 /**
+ * Get the total number of files in 'thread'.
+ *
+ * This sums notmuch_message_count_files over all messages in the
+ * thread
+ * @returns Non-negative integer
+ * @since libnotmuch 5.0 (notmuch 0.25)
+ */
+
+int
+notmuch_thread_get_total_files (notmuch_thread_t *thread);
+
+/**
  * Get a notmuch_messages_t iterator for the top-level messages in
  * 'thread' in oldest-first order.
  *