Improve the label completion hash table usage.

Move the hash table inside the Context.  Hook message arrival/deletion
to update the label hash.

Change the label hash to strdup keys.

Use hash_find_elem when updating the counter, to reduce unnecessary
add/delete operations.

1 files changed, 2 insertions, 0 deletions

diff --git a/pop.c b/pop.c
index 81f739af..a2210d6d 100644
--- a/pop.c
+++ b/pop.c
@@ -632,10 +632,12 @@ static int pop_fetch_message (CONTEXT* ctx, MESSAGE* msg, int msgno)
   /* we replace envelop, key in subj_hash has to be updated as well */
   if (ctx->subj_hash && h->env->real_subj)
     hash_delete (ctx->subj_hash, h->env->real_subj, h, NULL);
+  mutt_label_hash_remove (ctx, h);
   mutt_free_envelope (&h->env);
   h->env = mutt_read_rfc822_header (msg->fp, h, 0, 0);
   if (ctx->subj_hash && h->env->real_subj)
     hash_insert (ctx->subj_hash, h->env->real_subj, h, 1);
+  mutt_label_hash_add (ctx, h);
 
   h->data = uidl;
   h->lines = 0;