(mh_qfetch): Implement quick_get method.

@@ -246,6 +246,44 @@ mh_scan0 (mu_mailbox_t mailbox, size_t msgno MU_ARG_UNUSED, size_t *pcount,
   return status;
   return status;
 }
 }
 
 
+static int
+mh_qfetch (struct _amd_data *amd, mu_message_qid_t qid)
+{
+  char *p;
+  size_t num = 0;
+  int attr_flags = 0;
+  struct _mh_message *msg;
+
+  p = qid + strlen (qid) - 1;
+  if (!isdigit (*p))
+    return EINVAL;
+  
+  for (p--; p >= qid && isdigit (*p); p--)
+    ;
+
+  if (p == qid)
+    return EINVAL;
+
+  num = strtoul (p + 1, NULL, 10);
+  
+  if (*p == ',')
+    {
+      attr_flags |= MU_ATTRIBUTE_DELETED;
+      p--;
+    }
+
+  if (*p != '/')
+    return EINVAL;
+  
+  msg = calloc (1, sizeof (*msg));
+  msg->seq_number = num;
+  msg->amd_message.attr_flags = attr_flags;
+  msg->amd_message.deleted = attr_flags & MU_ATTRIBUTE_DELETED;
+  _amd_message_insert (amd, (struct _amd_message*) msg);
+  return 0;
+}
+
+
 /* Note: In this particular implementation the message sequence number
 /* Note: In this particular implementation the message sequence number
    serves also as its UID. This allows to avoid many problems related
    serves also as its UID. This allows to avoid many problems related
    to keeping the uids in the headers of the messages. */
    to keeping the uids in the headers of the messages. */
@@ -285,6 +323,7 @@ _mailbox_mh_init (mu_mailbox_t mailbox)
   amd->msg_finish_delivery = NULL;
   amd->msg_finish_delivery = NULL;
   amd->msg_file_name = _mh_message_name;
   amd->msg_file_name = _mh_message_name;
   amd->scan0 = mh_scan0;
   amd->scan0 = mh_scan0;
+  amd->qfetch = mh_qfetch;
   amd->msg_cmp = mh_message_cmp;
   amd->msg_cmp = mh_message_cmp;
   amd->message_uid = mh_message_uid;
   amd->message_uid = mh_message_uid;
   amd->next_uid = _mh_next_seq;
   amd->next_uid = _mh_next_seq;