Change Gnus hash tables into real hash tables

Gnus has used obarrays as makeshift hash tables for groups: group
names are coerced to unibyte and interned in custom obarrays, and
their symbol-value set to whatever value needs to be stored. This
patch replaces those obarrays with actual hash tables.

* lisp/gnus/gnus-util.el (gnus-intern-safe, gnus-create-hash-size):
  Remove functions.
  (gnus-make-hashtable): Change to return a real hash table.
  (gnus-text-property-search): Utility similar to `text-property-any',
  but compares on `equal'. Needed because the 'gnus-group text
  property is now a string.
* lisp/gnus/gnus.el (gnus-gethash, gnus-gethash-safe, gnus-sethash):
  Remove macros.
  (gnus-group-list): New variable holding all group names as an
  ordered list. Used because `gnus-newsrc-hashtb' used to preserve
  `gnus-newsrc-alist' ordering, but now doesn't.
* lisp/gnus/nnmaildir.el (nnmaildir--servers): Change from obarray to
  alist.
  (nnmaildir--up2-1): Remove function.
* lisp/thingatpt.el (thing-at-point-newsgroup-p): This was making use
  of Gnus obarrays, replace with a cond that can handle many different
  possibilities.
* lisp/gnus/gnus-bcklg.el (gnus-backlog-articles): Remove
  gnus-backlog-hashtb, which wasn't doing anything. Just keep a list
  of ident strings in gnus-backlog-articles.
  (gnus-backlog-setup): Delete unnecessary function.
  (gnus-backlog-enter-article, gnus-backlog-remove-oldest-article,
  gnus-backlog-remove-article, gnus-backlog-request-article): Alter
  calls accordingly.
* lisp/gnus/gnus-dup.el (gnus-duplicate-list-max-length): Rename from
  `gnus-duplicate-list-length', for accuracy.
* lisp/gnus/gnus-start.el (gnus-active-to-gnus-format,
  gnus-groups-to-gnus-format, gnus-newsrc-to-gnus-format): Read group
  names as strings.
  (gnus-gnus-to-quick-newsrc-format): Write `gnus-newsrc-alist' using
  the ordering in `gnus-group-list'.
* lisp/gnus/gnus-agent.el:
* lisp/gnus/gnus-async.el:
* lisp/gnus/gnus-cache.el:
* lisp/gnus/gnus-group.el:
* lisp/gnus/gnus-score.el:
* lisp/gnus/gnus-sum.el:
* lisp/gnus/gnus-topic.el:
* lisp/gnus/message.el:
* lisp/gnus/mml.el:
* lisp/gnus/nnagent.el:
* lisp/gnus/nnbabyl.el:
* lisp/gnus/nnvirtual.el:
* lisp/gnus/nnweb.el: In all files, change obarrays to hash-tables,
  and swap `gnus-sethash' for `puthash', `gnus-gethash' for `gethash',
  `mapatoms' for `maphash', etc.
* test/lisp/gnus/gnus-test-headers.el (gnus-headers-make-dependency-table,
  gnus-headers-loop-dependencies): New tests to make sure we're
  building `gnus-newsgroup-dependencies' correctly.

1 files changed, 4 insertions, 4 deletions

diff --git a/lisp/gnus/nnweb.el b/lisp/gnus/nnweb.el
index 357af103da7..7b87502d0e0 100644
--- a/lisp/gnus/nnweb.el
+++ b/lisp/gnus/nnweb.el
@@ -109,7 +109,7 @@ Valid types include `google', `dejanews', and `gmane'.")
 (deffoo nnweb-request-scan (&optional group server)
   (nnweb-possibly-change-server group server)
   (if nnweb-ephemeral-p
-      (setq nnweb-hashtb (gnus-make-hashtable 4095))
+      (setq nnweb-hashtb (gnus-make-hashtable 4000))
     (unless nnweb-articles
       (nnweb-read-overview group)))
   (funcall (nnweb-definition 'map))
@@ -229,11 +229,11 @@ Valid types include `google', `dejanews', and `gmane'.")
 	(nnheader-insert-nov (cadr (pop articles)))))))
 
 (defun nnweb-set-hashtb (header data)
-  (gnus-sethash (nnweb-identifier (mail-header-xref header))
+  (puthash (nnweb-identifier (mail-header-xref header))
 		data nnweb-hashtb))
 
 (defun nnweb-get-hashtb (url)
-  (gnus-gethash (nnweb-identifier url) nnweb-hashtb))
+  (gethash (nnweb-identifier url) nnweb-hashtb))
 
 (defun nnweb-identifier (ident)
   (funcall (nnweb-definition 'identifier) ident))
@@ -268,7 +268,7 @@ Valid types include `google', `dejanews', and `gmane'.")
   (unless nnweb-group-alist
     (nnweb-read-active))
   (unless nnweb-hashtb
-    (setq nnweb-hashtb (gnus-make-hashtable 4095)))
+    (setq nnweb-hashtb (make-hash-table :size 4000 :test #'equal)))
   (when group
     (setq nnweb-group group)))