X-Git-Url: https://cgit.sxemacs.org/?p=gnus;a=blobdiff_plain;f=lisp%2Fgnus-cache.el;h=a0763f37c9958b1a213c49503498484a15d68229;hp=f126d4845702e5395ebad2361d0946039a42e3f2;hb=fda79fc773c3018266173a6c4ea3776685845c1d;hpb=ee39f8f0b7ba9a8454cb8b9bc93e9bad001a1498

diff --git a/lisp/gnus-cache.el b/lisp/gnus-cache.el
index f126d4845..a0763f37c 100644
--- a/lisp/gnus-cache.el
+++ b/lisp/gnus-cache.el
@@ -1,7 +1,8 @@
 ;;; gnus-cache.el --- cache interface for Gnus
-;; Copyright (C) 1995,96 Free Software Foundation, Inc.
+;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
+;;        Free Software Foundation, Inc.
 
-;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;; Keywords: news
 
 ;; This file is part of GNU Emacs.
@@ -25,6 +26,8 @@
 
 ;;; Code:
 
+(eval-when-compile (require 'cl))
+
 (require 'gnus)
 (require 'gnus-int)
 (require 'gnus-range)
@@ -32,18 +35,8 @@
 (eval-when-compile
   (require 'gnus-sum))
 
-(defgroup gnus-cache nil
-  "Cache interface."
-  :group 'gnus)
-
-(defcustom gnus-cache-directory
-  (nnheader-concat gnus-directory "cache/")
-  "*The directory where cached articles will be stored."
-  :group 'gnus-cache
-  :type 'directory)
-
-(defcustom gnus-cache-active-file 
-  (concat (file-name-as-directory gnus-cache-directory) "active")
+(defcustom gnus-cache-active-file
+  (expand-file-name "active" gnus-cache-directory)
   "*The cache active file."
   :group 'gnus-cache
   :type 'file)
@@ -58,15 +51,36 @@
   :group 'gnus-cache
   :type '(set (const ticked) (const dormant) (const unread) (const read)))
 
+(defcustom gnus-cacheable-groups nil
+  "*Groups that match this regexp will be cached.
+
+If you only want to cache your nntp groups, you could set this
+variable to \"^nntp\".
+
+If a group matches both gnus-cacheable-groups and gnus-uncacheable-groups
+it's not cached."
+  :group 'gnus-cache
+  :type '(choice (const :tag "off" nil)
+		 regexp))
+
 (defcustom gnus-uncacheable-groups nil
   "*Groups that match this regexp will not be cached.
 
 If you want to avoid caching your nnml groups, you could set this
-variable to \"^nnml\"."
+variable to \"^nnml\".
+
+If a group matches both gnus-cacheable-groups and gnus-uncacheable-groups
+it's not cached."
   :group 'gnus-cache
   :type '(choice (const :tag "off" nil)
 		 regexp))
 
+(defvar gnus-cache-overview-coding-system 'raw-text
+  "Coding system used on Gnus cache files.")
+
+(defvar gnus-cache-coding-system 'raw-text
+  "Coding system used on Gnus cache files.")
+
 
 
 ;;; Internal variables.
@@ -114,7 +128,9 @@ variable to \"^nnml\"."
 	  (set-buffer buffer)
 	  (if (> (buffer-size) 0)
 	      ;; Non-empty overview, write it to a file.
-	      (gnus-write-buffer overview-file)
+	      (let ((coding-system-for-write
+		     gnus-cache-overview-coding-system))
+		(gnus-write-buffer overview-file))
 	    ;; Empty overview file, remove it
 	    (when (file-exists-p overview-file)
 	      (delete-file overview-file))
@@ -129,42 +145,43 @@ variable to \"^nnml\"."
       (gnus-kill-buffer buffer)
       (setq gnus-cache-buffer nil))))
 
-(defun gnus-cache-possibly-enter-article 
-  (group article headers ticked dormant unread &optional force)
+(defun gnus-cache-possibly-enter-article
+  (group article ticked dormant unread &optional force)
   (when (and (or force (not (eq gnus-use-cache 'passive)))
 	     (numberp article)
-	     (> article 0)
-	     (vectorp headers))
-					; This might be a dummy article.
-    ;; If this is a virtual group, we find the real group.
-    (when (gnus-virtual-group-p group)
-      (let ((result (nnvirtual-find-group-art 
-		     (gnus-group-real-name group) article)))
-	(setq group (car result)
-	      headers (copy-sequence headers))
-	(mail-header-set-number headers (cdr result))))
-    (let ((number (mail-header-number headers))
-	  file dir)
-      (when (and (> number 0)		; Reffed article.
+	     (> article 0))		; This might be a dummy article.
+    (let ((number article) file headers)
+      ;; If this is a virtual group, we find the real group.
+      (when (gnus-virtual-group-p group)
+	(let ((result (nnvirtual-find-group-art
+		       (gnus-group-real-name group) article)))
+	  (setq group (car result)
+		number (cdr result))))
+      (when (and number
+		 (> number 0)		; Reffed article.
 		 (or force
-		     (and (or (not gnus-uncacheable-groups)
-			      (not (string-match
-				    gnus-uncacheable-groups group)))
+		     (and (gnus-cache-fully-p group)
 			  (gnus-cache-member-of-class
 			   gnus-cache-enter-articles ticked dormant unread)))
 		 (not (file-exists-p (setq file (gnus-cache-file-name
 						 group number)))))
 	;; Possibly create the cache directory.
-	(gnus-make-directory (setq dir (file-name-directory file)))
+	(gnus-make-directory (file-name-directory file))
 	;; Save the article in the cache.
 	(if (file-exists-p file)
 	    t				; The article already is saved.
 	  (save-excursion
 	    (set-buffer nntp-server-buffer)
-	    (let ((gnus-use-cache nil))
+	    (require 'gnus-art)
+	    (let ((gnus-use-cache nil)
+		  (gnus-article-decode-hook nil))
 	      (gnus-request-article-this-buffer number group))
 	    (when (> (buffer-size) 0)
-	      (gnus-write-buffer file)
+	      (let ((coding-system-for-write gnus-cache-coding-system))
+		(gnus-write-buffer file))
+	      (nnheader-remove-body)
+	      (setq headers (nnheader-parse-naked-head))
+	      (mail-header-set-number headers number)
 	      (gnus-cache-change-buffer group)
 	      (set-buffer (cdr gnus-cache-buffer))
 	      (goto-char (point-max))
@@ -186,21 +203,12 @@ variable to \"^nnml\"."
 		    (beginning-of-line))
 		(forward-line 1))
 	      (beginning-of-line)
-	      ;; [number subject from date id references chars lines xref]
-	      (insert (format "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t\n"
-			      (mail-header-number headers)
-			      (mail-header-subject headers)
-			      (mail-header-from headers)
-			      (mail-header-date headers)
-			      (mail-header-id headers)
-			      (or (mail-header-references headers) "")
-			      (or (mail-header-chars headers) "")
-			      (or (mail-header-lines headers) "")
-			      (or (mail-header-xref headers) "")))
+	      (nnheader-insert-nov headers)
 	      ;; Update the active info.
 	      (set-buffer gnus-summary-buffer)
-	      (gnus-cache-update-active group number)
-	      (push article gnus-newsgroup-cached)
+	      (gnus-cache-possibly-update-active group (cons number number))
+	      (setq gnus-newsgroup-cached
+		    (gnus-add-to-sorted-list gnus-newsgroup-cached article))
 	      (gnus-summary-update-secondary-mark article))
 	    t))))))
 
@@ -225,7 +233,7 @@ variable to \"^nnml\"."
 
 (defun gnus-cache-possibly-remove-articles-1 ()
   "Possibly remove some of the removable articles."
-  (unless (eq gnus-use-cache 'passive)
+  (when (gnus-cache-fully-p gnus-newsgroup-name)
     (let ((articles gnus-cache-removable-articles)
 	  (cache-articles gnus-newsgroup-cached)
 	  article)
@@ -250,41 +258,38 @@ variable to \"^nnml\"."
     (when (file-exists-p file)
       (erase-buffer)
       (gnus-kill-all-overlays)
-      (insert-file-contents file)
+      (let ((coding-system-for-read gnus-cache-coding-system))
+	(insert-file-contents file))
       t)))
 
 (defun gnus-cache-possibly-alter-active (group active)
   "Alter the ACTIVE info for GROUP to reflect the articles in the cache."
-  (when (equal group "no.norsk") (error "hie"))
   (when gnus-cache-active-hashtb
     (let ((cache-active (gnus-gethash group gnus-cache-active-hashtb)))
-      (and cache-active 
-	   (< (car cache-active) (car active))
-	   (setcar active (car cache-active)))
-      (and cache-active
-	   (> (cdr cache-active) (cdr active))
-	   (setcdr active (cdr cache-active))))))
+      (when cache-active
+	(when (< (car cache-active) (car active))
+	  (setcar active (car cache-active)))
+	(when (> (cdr cache-active) (cdr active))
+	  (setcdr active (cdr cache-active)))))))
 
 (defun gnus-cache-retrieve-headers (articles group &optional fetch-old)
   "Retrieve the headers for ARTICLES in GROUP."
-  (let ((cached 
+  (let ((cached
 	 (setq gnus-newsgroup-cached (gnus-cache-articles-in-group group))))
     (if (not cached)
 	;; No cached articles here, so we just retrieve them
 	;; the normal way.
 	(let ((gnus-use-cache nil))
 	  (gnus-retrieve-headers articles group fetch-old))
-      (let ((uncached-articles (gnus-sorted-intersection
-				(gnus-sorted-complement articles cached)
-				articles))
+      (let ((uncached-articles (gnus-sorted-difference articles cached))
 	    (cache-file (gnus-cache-file-name group ".overview"))
 	    type)
-	;; We first retrieve all the headers that we don't have in 
+	;; We first retrieve all the headers that we don't have in
 	;; the cache.
 	(let ((gnus-use-cache nil))
 	  (when uncached-articles
-	    (setq type (and articles 
-			    (gnus-retrieve-headers 
+	    (setq type (and articles
+			    (gnus-retrieve-headers
 			     uncached-articles group fetch-old)))))
 	(gnus-cache-save-buffers)
 	;; Then we insert the cached headers.
@@ -294,11 +299,13 @@ variable to \"^nnml\"."
 	    ;; There are no cached headers.
 	    type)
 	   ((null type)
-	    ;; There were no uncached headers (or retrieval was 
+	    ;; There were no uncached headers (or retrieval was
 	    ;; unsuccessful), so we use the cached headers exclusively.
 	    (set-buffer nntp-server-buffer)
 	    (erase-buffer)
-	    (insert-file-contents cache-file)
+	    (let ((coding-system-for-read
+		   gnus-cache-overview-coding-system))
+	      (insert-file-contents cache-file))
 	    'nov)
 	   ((eq type 'nov)
 	    ;; We have both cached and uncached NOV headers, so we
@@ -316,37 +323,34 @@ variable to \"^nnml\"."
 If not given a prefix, use the process marked articles instead.
 Returns the list of articles entered."
   (interactive "P")
-  (gnus-set-global-variables)
   (let ((articles (gnus-summary-work-articles n))
 	article out)
     (while (setq article (pop articles))
+      (gnus-summary-remove-process-mark article)
       (if (natnump article)
-	  (when (gnus-cache-possibly-enter-article 
-		 gnus-newsgroup-name article 
-		 (gnus-summary-article-header article)
+	  (when (gnus-cache-possibly-enter-article
+		 gnus-newsgroup-name article
 		 nil nil nil t)
 	    (push article out))
 	(gnus-message 2 "Can't cache article %d" article))
-      (gnus-summary-remove-process-mark article)
       (gnus-summary-update-secondary-mark article))
     (gnus-summary-next-subject 1)
     (gnus-summary-position-point)
     (nreverse out)))
 
-(defun gnus-cache-remove-article (n)
+(defun gnus-cache-remove-article (&optional n)
   "Remove the next N articles from the cache.
 If not given a prefix, use the process marked articles instead.
 Returns the list of articles removed."
   (interactive "P")
-  (gnus-set-global-variables)
   (gnus-cache-change-buffer gnus-newsgroup-name)
   (let ((articles (gnus-summary-work-articles n))
 	article out)
     (while articles
       (setq article (pop articles))
+      (gnus-summary-remove-process-mark article)
       (when (gnus-cache-possibly-remove-article article nil nil nil t)
 	(push article out))
-      (gnus-summary-remove-process-mark article)
       (gnus-summary-update-secondary-mark article))
     (gnus-summary-next-subject 1)
     (gnus-summary-position-point)
@@ -359,12 +363,20 @@ Returns the list of articles removed."
 (defun gnus-summary-insert-cached-articles ()
   "Insert all the articles cached for this group into the current buffer."
   (interactive)
-  (let ((cached gnus-newsgroup-cached)
-	(gnus-verbose (max 6 gnus-verbose)))
-    (unless cached
-      (error "No cached articles for this group"))
-    (while cached
-      (gnus-summary-goto-subject (pop cached) t))))
+  (let ((gnus-verbose (max 6 gnus-verbose)))
+    (if (not gnus-newsgroup-cached)
+	(gnus-message 3 "No cached articles for this group")
+      (gnus-summary-goto-subjects gnus-newsgroup-cached))))
+
+(defun gnus-summary-limit-include-cached ()
+  "Limit the summary buffer to articles that are cached."
+  (interactive)
+  (let ((gnus-verbose (max 6 gnus-verbose)))
+    (if gnus-newsgroup-cached
+	(progn
+	  (gnus-summary-limit gnus-newsgroup-cached)
+	  (gnus-summary-position-point))
+      (gnus-message 3 "No cached articles for this group"))))
 
 ;;; Internal functions.
 
@@ -380,14 +392,14 @@ Returns the list of articles removed."
     (save-excursion
       (setq gnus-cache-buffer
 	    (cons group
-		  (set-buffer (get-buffer-create " *gnus-cache-overview*"))))
-      (buffer-disable-undo (current-buffer))
+		  (set-buffer (gnus-get-buffer-create
+			       " *gnus-cache-overview*"))))
       ;; Insert the contents of this group's cache overview.
       (erase-buffer)
       (let ((file (gnus-cache-file-name group ".overview")))
 	(when (file-exists-p file)
 	  (nnheader-insert-file-contents file)))
-      ;; We have a fresh (empty/just loaded) buffer, 
+      ;; We have a fresh (empty/just loaded) buffer,
       ;; mark it as unmodified to save a redundant write later.
       (set-buffer-modified-p nil))))
 
@@ -399,27 +411,34 @@ Returns the list of articles removed."
       (and (not unread) (not ticked) (not dormant) (memq 'read class))))
 
 (defun gnus-cache-file-name (group article)
-  (concat (file-name-as-directory gnus-cache-directory)
-	  (file-name-as-directory
-	   (nnheader-translate-file-chars
-	    (if (gnus-use-long-file-name 'not-cache)
-		group
-	      (let ((group (nnheader-replace-chars-in-string group ?/ ?_)))
-		;; Translate the first colon into a slash.
-		(when (string-match ":" group)
-		  (aset group (match-beginning 0) ?/))
-		(nnheader-replace-chars-in-string group ?. ?/)))))
-	  (if (stringp article) article (int-to-string article))))
+  (expand-file-name
+   (if (stringp article) article (int-to-string article))
+   (file-name-as-directory
+    (expand-file-name
+     (nnheader-translate-file-chars
+      (if (gnus-use-long-file-name 'not-cache)
+	  group
+	(let ((group (nnheader-replace-duplicate-chars-in-string
+		      (nnheader-replace-chars-in-string group ?/ ?_)
+		      ?. ?_)))
+	  ;; Translate the first colon into a slash.
+	  (when (string-match ":" group)
+		  (setq group (concat (substring group 0 (match-beginning 0))
+				      "/" (substring group (match-end 0)))))
+	  (nnheader-replace-chars-in-string group ?. ?/)))
+      t)
+     gnus-cache-directory))))
 
 (defun gnus-cache-update-article (group article)
   "If ARTICLE is in the cache, remove it and re-enter it."
+  (gnus-cache-change-buffer group)
   (when (gnus-cache-possibly-remove-article article nil nil nil t)
     (let ((gnus-use-cache nil))
-      (gnus-cache-possibly-enter-article 
-       gnus-newsgroup-name article (gnus-summary-article-header article)
+      (gnus-cache-possibly-enter-article
+       gnus-newsgroup-name article
        nil nil nil t))))
 
-(defun gnus-cache-possibly-remove-article (article ticked dormant unread 
+(defun gnus-cache-possibly-remove-article (article ticked dormant unread
 						   &optional force)
   "Possibly remove ARTICLE from the cache."
   (let ((group gnus-newsgroup-name)
@@ -427,7 +446,7 @@ Returns the list of articles removed."
 	file)
     ;; If this is a virtual group, we find the real group.
     (when (gnus-virtual-group-p group)
-      (let ((result (nnvirtual-find-group-art 
+      (let ((result (nnvirtual-find-group-art
 		     (gnus-group-real-name group) article)))
 	(setq group (car result)
 	      number (cdr result))))
@@ -445,28 +464,43 @@ Returns the list of articles removed."
 				  (point-max) t))
 	  (delete-region (progn (beginning-of-line) (point))
 			 (progn (forward-line 1) (point)))))
-      (setq gnus-newsgroup-cached
-	    (delq article gnus-newsgroup-cached))
+      (unless (setq gnus-newsgroup-cached
+		    (delq article gnus-newsgroup-cached))
+	(gnus-sethash gnus-newsgroup-name nil gnus-cache-active-hashtb)
+	(setq gnus-cache-active-altered t))
       (gnus-summary-update-secondary-mark article)
       t)))
 
 (defun gnus-cache-articles-in-group (group)
   "Return a sorted list of cached articles in GROUP."
-  (let ((dir (file-name-directory (gnus-cache-file-name group 1))))
+  (let ((dir (file-name-directory (gnus-cache-file-name group 1)))
+	articles)
     (when (file-exists-p dir)
-      (sort (mapcar (lambda (name) (string-to-int name))
-		    (directory-files dir nil "^[0-9]+$" t))
-	    '<))))
-
-(defun gnus-cache-braid-nov (group cached)
-  (let ((cache-buf (get-buffer-create " *gnus-cache*"))
+      (setq articles
+	    (sort (mapcar (lambda (name) (string-to-int name))
+			  (directory-files dir nil "^[0-9]+$" t))
+		  '<))
+      ;; Update the cache active file, just to synch more.
+      (if articles
+	  (progn
+	    (gnus-cache-update-active group (car articles) t)
+	    (gnus-cache-update-active group (car (last articles))))
+	(when (gnus-gethash group gnus-cache-active-hashtb)
+	  (gnus-sethash group nil gnus-cache-active-hashtb)
+	  (setq gnus-cache-active-altered t)))
+      articles)))
+
+(defun gnus-cache-braid-nov (group cached &optional file)
+  (let ((cache-buf (gnus-get-buffer-create " *gnus-cache*"))
 	beg end)
     (gnus-cache-save-buffers)
     (save-excursion
       (set-buffer cache-buf)
-      (buffer-disable-undo (current-buffer))
       (erase-buffer)
-      (insert-file-contents (gnus-cache-file-name group ".overview"))
+      (let ((coding-system-for-read
+	     gnus-cache-overview-coding-system))
+	(insert-file-contents
+	 (or file (gnus-cache-file-name group ".overview"))))
       (goto-char (point-min))
       (insert "\n")
       (goto-char (point-min)))
@@ -477,13 +511,13 @@ Returns the list of articles removed."
 		  (< (read (current-buffer)) (car cached)))
 	(forward-line 1))
       (beginning-of-line)
-      (save-excursion
-	(set-buffer cache-buf)
-	(if (search-forward (concat "\n" (int-to-string (car cached)) "\t")
-			    nil t)
-	    (setq beg (progn (beginning-of-line) (point))
-		  end (progn (end-of-line) (point)))
-	  (setq beg nil)))
+      (set-buffer cache-buf)
+      (if (search-forward (concat "\n" (int-to-string (car cached)) "\t")
+			  nil t)
+	  (setq beg (progn (beginning-of-line) (point))
+		end (progn (end-of-line) (point)))
+	(setq beg nil))
+      (set-buffer nntp-server-buffer)
       (when beg
 	(insert-buffer-substring cache-buf beg end)
 	(insert "\n"))
@@ -491,10 +525,9 @@ Returns the list of articles removed."
     (kill-buffer cache-buf)))
 
 (defun gnus-cache-braid-heads (group cached)
-  (let ((cache-buf (get-buffer-create " *gnus-cache*")))
+  (let ((cache-buf (gnus-get-buffer-create " *gnus-cache*")))
     (save-excursion
       (set-buffer cache-buf)
-      (buffer-disable-undo (current-buffer))
       (erase-buffer))
     (set-buffer nntp-server-buffer)
     (goto-char (point-min))
@@ -506,18 +539,20 @@ Returns the list of articles removed."
 		     (car cached)))
 	(search-forward "\n.\n" nil 'move))
       (beginning-of-line)
-      (save-excursion
-	(set-buffer cache-buf)
-	(erase-buffer)
-	(insert-file-contents (gnus-cache-file-name group (car cached)))
-	(goto-char (point-min))
-	(insert "220 ")
-	(princ (car cached) (current-buffer))
-	(insert " Article retrieved.\n")
-	(search-forward "\n\n" nil 'move)
-	(delete-region (point) (point-max))
-	(forward-char -1)
-	(insert "."))
+      (set-buffer cache-buf)
+      (erase-buffer)
+      (let ((coding-system-for-read
+	     gnus-cache-coding-system))
+	(insert-file-contents (gnus-cache-file-name group (car cached))))
+      (goto-char (point-min))
+      (insert "220 ")
+      (princ (car cached) (current-buffer))
+      (insert " Article retrieved.\n")
+      (search-forward "\n\n" nil 'move)
+      (delete-region (point) (point-max))
+      (forward-char -1)
+      (insert ".")
+      (set-buffer nntp-server-buffer)
       (insert-buffer-substring cache-buf)
       (setq cached (cdr cached)))
     (kill-buffer cache-buf)))
@@ -532,6 +567,7 @@ $ emacs -batch -l ~/.emacs -l gnus -f gnus-jog-cache"
   (let ((gnus-mark-article-hook nil)
 	(gnus-expert-user t)
 	(nnmail-spool-file nil)
+	(mail-sources nil)
 	(gnus-use-dribble-file nil)
 	(gnus-novice-user nil)
 	(gnus-large-newsgroup nil))
@@ -539,50 +575,61 @@ $ emacs -batch -l ~/.emacs -l gnus -f gnus-jog-cache"
     (gnus)
     ;; Go through all groups...
     (gnus-group-mark-buffer)
-    (gnus-group-universal-argument 
-     nil nil 
-     (lambda ()
-       (interactive)
-       (gnus-summary-read-group (gnus-group-group-name) nil t)
-       ;; ... and enter the articles into the cache.
-       (when (eq major-mode 'gnus-summary-mode)
-	 (gnus-uu-mark-buffer)
-	 (gnus-cache-enter-article)
-	 (kill-buffer (current-buffer)))))))
+    (gnus-group-iterate nil
+      (lambda (group)
+	(let (gnus-auto-select-next)
+	  (gnus-summary-read-group group nil t)
+	  ;; ... and enter the articles into the cache.
+	  (when (eq major-mode 'gnus-summary-mode)
+	    (gnus-uu-mark-buffer)
+	    (gnus-cache-enter-article)
+	    (kill-buffer (current-buffer))))))))
 
 (defun gnus-cache-read-active (&optional force)
   "Read the cache active file."
   (gnus-make-directory gnus-cache-directory)
-  (if (not (and (file-exists-p gnus-cache-active-file)
-		(or force (not gnus-cache-active-hashtb))))
+  (if (or (not (file-exists-p gnus-cache-active-file))
+	  (zerop (nth 7 (file-attributes gnus-cache-active-file)))
+	  force)
       ;; There is no active file, so we generate one.
       (gnus-cache-generate-active)
     ;; We simply read the active file.
     (save-excursion
       (gnus-set-work-buffer)
-      (insert-file-contents gnus-cache-active-file)
+      (nnheader-insert-file-contents gnus-cache-active-file)
       (gnus-active-to-gnus-format
-       nil (setq gnus-cache-active-hashtb 
-		 (gnus-make-hashtable 
+       nil (setq gnus-cache-active-hashtb
+		 (gnus-make-hashtable
 		  (count-lines (point-min) (point-max)))))
       (setq gnus-cache-active-altered nil))))
-       
+
 (defun gnus-cache-write-active (&optional force)
   "Write the active hashtb to the active file."
   (when (or force
 	    (and gnus-cache-active-hashtb
 		 gnus-cache-active-altered))
-    (nnheader-temp-write gnus-cache-active-file
-      (mapatoms
-       (lambda (sym)
-	 (when (and sym (boundp sym))
-	   (insert (format "%s %d %d y\n"
-			   (symbol-name sym) (cdr (symbol-value sym))
-			   (car (symbol-value sym))))))
-       gnus-cache-active-hashtb))
+    (gnus-write-active-file gnus-cache-active-file gnus-cache-active-hashtb t)
     ;; Mark the active hashtb as unaltered.
     (setq gnus-cache-active-altered nil)))
 
+(defun gnus-cache-possibly-update-active (group active)
+  "Update active info bounds of GROUP with ACTIVE if necessary.
+The update is performed if ACTIVE contains a higher or lower bound
+than the current."
+  (let ((lower t) (higher t))
+    (if gnus-cache-active-hashtb
+	(let ((cache-active (gnus-gethash group gnus-cache-active-hashtb)))
+	  (when cache-active
+	    (unless (< (car active) (car cache-active))
+	      (setq lower nil))
+	    (unless (> (cdr active) (cdr cache-active))
+	      (setq higher nil))))
+      (gnus-cache-read-active))
+    (when lower
+      (gnus-cache-update-active group (car active) t))
+    (when higher
+      (gnus-cache-update-active group (cdr active)))))
+
 (defun gnus-cache-update-active (group number &optional low)
   "Update the upper bound of the active info of GROUP to NUMBER.
 If LOW, update the lower bound instead."
@@ -604,20 +651,23 @@ If LOW, update the lower bound instead."
   (let* ((top (null directory))
 	 (directory (expand-file-name (or directory gnus-cache-directory)))
 	 (files (directory-files directory 'full))
-	 (group 
+	 (group
 	  (if top
 	      ""
-	    (string-match 
-	     (concat "^" (file-name-as-directory
-			  (expand-file-name gnus-cache-directory)))
+	    (string-match
+	     (concat "^" (regexp-quote
+			  (file-name-as-directory
+			   (expand-file-name gnus-cache-directory))))
 	     (directory-file-name directory))
-	    (nnheader-replace-chars-in-string 
+	    (nnheader-replace-chars-in-string
 	     (substring (directory-file-name directory) (match-end 0))
 	     ?/ ?.)))
 	 nums alphs)
     (when top
       (gnus-message 5 "Generating the cache active file...")
       (setq gnus-cache-active-hashtb (gnus-make-hashtable 123)))
+    (when (string-match "^\\(nn[^_]+\\)_" group)
+      (setq group (replace-match "\\1:" t t group)))
     ;; Separate articles from all other files and directories.
     (while files
       (if (string-match "^[0-9]+$" (file-name-nondirectory (car files)))
@@ -630,7 +680,7 @@ If LOW, update the lower bound instead."
     ;; Go through all the other files.
     (while alphs
       (when (and (file-directory-p (car alphs))
-		 (not (string-match "^\\.\\.?$"
+		 (not (string-match "^\\."
 				    (file-name-nondirectory (car alphs)))))
 	;; We descend directories.
 	(gnus-cache-generate-active (car alphs)))
@@ -646,13 +696,27 @@ If LOW, update the lower bound instead."
   (interactive (list gnus-cache-directory))
   (gnus-cache-close)
   (let ((nnml-generate-active-function 'identity))
-    (nnml-generate-nov-databases-1 dir)))
+    (nnml-generate-nov-databases-1 dir))
+  (gnus-cache-open))
 
 (defun gnus-cache-move-cache (dir)
   "Move the cache tree to somewhere else."
-  (interactive "DMove the cache tree to: ")
+  (interactive "FMove the cache tree to: ")
   (rename-file gnus-cache-directory dir))
 
+(defun gnus-cache-fully-p (&optional group)
+  "Returns non-nil if the cache should be fully used.
+If GROUP is non-nil, also cater to `gnus-cacheable-groups' and
+`gnus-uncacheable-groups'."
+  (and gnus-use-cache
+       (not (eq gnus-use-cache 'passive))
+       (if (null group)
+	   t
+	 (and (or (not gnus-cacheable-groups)
+		  (string-match gnus-cacheable-groups group))
+	      (or (not gnus-uncacheable-groups)
+		  (not (string-match gnus-uncacheable-groups group)))))))
+
 (provide 'gnus-cache)
-	      
+
 ;;; gnus-cache.el ends here