Provide a library function for translating message UIDs to numbers and vice versa.

* include/mailutils/mailbox.h (MU_MAILBOX_UID_TO_MSGNO)
(MU_MAILBOX_MSGNO_TO_UID): New defines.
(mu_mailbox_translate): New proto.
* include/mailutils/sys/mailbox.h (_mu_mailbox) <_translate>: New
method.
* libmailutils/mailbox/mailbox.c (mu_mailbox_translate): New
function.
* libproto/mh/mbox.c (mh_translate): New function.  Implements
the _translate method.
* mh/mh_msgset.c (mh_uid_to_msgno, mh_msgno_to_uid): Remove.  All
callers updated to use mu_mailbox_translate instead.
(mh_search_message): Remove.
(mh_get_message): Rewrite using mu_mailbox_translate.

* mh/comp.c (copy_message): Check return from mu_mailbox_get_message.
* mh/mh_init.c (mh_draft_message): Rewrite using mu_url_sget_path.
* mh/tests/comp.at: Test draftfolder functionality.

1 files changed, 7 insertions, 1 deletions

diff --git a/mh/comp.c b/mh/comp.c
index 964baf463..c6046181e 100644
--- a/mh/comp.c
+++ b/mh/comp.c
@@ -161,7 +161,13 @@ copy_message (mu_mailbox_t mbox, size_t n, const char *file)
   mu_stream_t out;
   int rc;
   
-  mu_mailbox_get_message (mbox, n, &msg);
+  rc = mu_mailbox_get_message (mbox, n, &msg);
+  if (rc)
+    {
+      mu_diag_funcall (MU_DIAG_ERROR, "mu_mailbox_get_message", NULL, rc);
+      exit (1);
+    }
+  
   mu_message_get_streamref (msg, &in);
   
   if ((rc = mu_file_stream_create (&out,