lib: Move notmuch_messages_t code from query.cc to new messages.c

The new object is simply a linked-list of notmuch_message_t objects,
(unlike the old object which contained a couple of Xapian iterators).
This works now by the query code immediately iterator over all results
and creating notmuch_message_t objects for them, (rather than waiting
to create the objects until the notmuch_messages_get call as we did
earlier).

The point of this change is to allow other instances of lists of
messages, (such as in notmuch_thread_t), that are not directly related
to Xapian search results.

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/notmuch-private.h b/lib/notmuch-private.h
index c286aa4b..bb1f235e 100644
--- a/lib/notmuch-private.h
+++ b/lib/notmuch-private.h
@@ -275,6 +275,15 @@ const char *
 notmuch_message_file_get_header (notmuch_message_file_t *message,
 				 const char *header);
 
+/* messages.c */
+
+notmuch_messages_t *
+_notmuch_messages_create (void *ctx);
+
+void
+_notmuch_messages_add_message (notmuch_messages_t *messages,
+			       notmuch_message_t *message);
+
 /* date.c */
 
 /* Parse an RFC 8222 date string to a time_t value.