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+;;; gnus-score.el --- scoring code for Gnus
+;; Copyright (C) 1995 Free Software Foundation, Inc.
+
+;; Author: Per Abrahamsen <amanda@iesd.auc.dk>
+;;	Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;; Keywords: news
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'gnus)
+
+(defvar gnus-score-expiry-days 7
+  "*Number of days before unused score file entries are expired.")
+
+(defvar gnus-orphan-score nil
+  "*All orphans get this score added. Set in the score file.")
+
+(defvar gnus-default-adaptive-score-alist  
+  '((gnus-kill-file-mark)
+    (gnus-unread-mark)
+    (gnus-read-mark (from  3) (subject  30))
+    (gnus-catchup-mark (subject -10))
+    (gnus-killed-mark (from -1) (subject -20))
+    (gnus-del-mark (from -2) (subject -15)))
+"*Alist of marks and scores.")
+
+(defvar gnus-score-mimic-keymap nil
+  "*Have the score entry functions pretend that they are a keymap.")
+
+(defvar gnus-score-exact-adapt-limit 10
+  "*Number that says how long a match has to be before using substring matching.
+When doing adaptive scoring, one normally uses fuzzy or substring
+matching. However, if the header one matches is short, the possibility
+for false positives is great, so if the length of the match is less
+than this variable, exact matching will be used.
+
+If this variable is nil, exact matching will always be used.")
+
+
+
+;; Internal variables.
+
+(defvar gnus-score-help-winconf nil)
+(defvar gnus-adaptive-score-alist gnus-default-adaptive-score-alist)
+(defvar gnus-score-trace nil)
+(defvar gnus-score-edit-buffer nil)
+
+(defvar gnus-score-alist nil
+  "Alist containing score information.
+The keys can be symbols or strings.  The following symbols are defined. 
+
+touched: If this alist has been modified.
+mark:    Automatically mark articles below this.
+expunge: Automatically expunge articles below this.
+files:   List of other score files to load when loading this one.
+eval:    Sexp to be evaluated when the score file is loaded.
+
+String entries have the form (HEADER (MATCH TYPE SCORE DATE) ...) 
+where HEADER is the header being scored, MATCH is the string we are
+looking for, TYPE is a flag indicating whether it should use regexp or
+substring matching, SCORE is the score to add and DATE is the date
+of the last successful match.")
+
+(defvar gnus-score-cache nil)
+(defvar gnus-scores-articles nil)
+(defvar gnus-header-index nil)
+(defvar gnus-score-index nil)
+
+(eval-and-compile
+  (autoload 'gnus-uu-ctl-map "gnus-uu" nil nil 'keymap)
+  (autoload 'appt-select-lowest-window "appt.el"))
+
+;;; Summary mode score maps.
+
+(defvar gnus-summary-score-map nil)
+
+(define-prefix-command 'gnus-summary-score-map)
+(define-key gnus-summary-mode-map "V" 'gnus-summary-score-map)
+(define-key gnus-summary-score-map "s" 'gnus-summary-set-score)
+(define-key gnus-summary-score-map "a" 'gnus-summary-score-entry)
+(define-key gnus-summary-score-map "S" 'gnus-summary-current-score)
+(define-key gnus-summary-score-map "c" 'gnus-score-change-score-file)
+(define-key gnus-summary-score-map "m" 'gnus-score-set-mark-below)
+(define-key gnus-summary-score-map "x" 'gnus-score-set-expunge-below)
+(define-key gnus-summary-score-map "e" 'gnus-score-edit-alist)
+(define-key gnus-summary-score-map "f" 'gnus-score-edit-file)
+(define-key gnus-summary-score-map "t" 'gnus-score-find-trace)
+(define-key gnus-summary-score-map "C" 'gnus-score-customize)
+
+
+
+;; Summary score file commands
+
+;; Much modification of the kill (ahem, score) code and lots of the
+;; functions are written by Per Abrahamsen <amanda@iesd.auc.dk>.
+
+(defun gnus-summary-lower-score (&optional score)
+  "Make a score entry based on the current article.
+The user will be prompted for header to score on, match type,
+permanence, and the string to be used.  The numerical prefix will be
+used as score."
+  (interactive "P")
+  (gnus-summary-increase-score (- (gnus-score-default score))))
+
+(defun gnus-summary-increase-score (&optional score)
+  "Make a score entry based on the current article.
+The user will be prompted for header to score on, match type,
+permanence, and the string to be used.  The numerical prefix will be
+used as score."
+  (interactive "P")
+  (gnus-set-global-variables)
+  (let* ((nscore (gnus-score-default score))
+	 (prefix (if (< nscore 0) ?L ?I))
+	 (increase (> nscore 0))
+	 (char-to-header 
+	  '((?a "from" nil nil string)
+	    (?s "subject" nil nil string)
+	    (?b "body" "" nil body-string)
+	    (?h "head" "" nil body-string)
+	    (?i "message-id" nil t string)
+	    (?t "references" "message-id" t string)
+	    (?x "xref" nil nil string)
+	    (?l "lines" nil nil number)
+	    (?d "date" nil nil date)
+	    (?f "followup" nil nil string)))
+	 (char-to-type
+	  '((?s s "substring" string)
+	    (?e e "exact string" string)
+	    (?f f "fuzzy string" string)
+	    (?r r "regexp string" string)
+	    (?s s "substring" body-string)
+	    (?r s "regexp string" body-string)
+	    (?b before "before date" date)
+	    (?a at "at date" date) 
+	    (?n now "this date" date)
+	    (?< < "less than number" number)
+	    (?> > "greater than number" number) 
+	    (?= = "equal to number" number)))
+	 (char-to-perm
+	  (list (list ?t (current-time-string) "temporary") 
+		'(?p perm "permanent") '(?i now "immediate")))
+	 (mimic gnus-score-mimic-keymap)
+	 hchar entry temporary tchar pchar end type)
+    ;; First we read the header to score.
+    (while (not hchar)
+      (if mimic
+	  (progn 
+	    (sit-for 1)
+	    (message "%c-" prefix))
+	(message "%s header (%s?): " (if increase "Increase" "Lower")
+		 (mapconcat (lambda (s) (char-to-string (car s)))
+			    char-to-header "")))
+      (setq hchar (read-char))
+      (if (not (or (= hchar ??) (= hchar ?\C-h)))
+	  ()
+	(setq hchar nil)
+	(gnus-score-insert-help "Match on header" char-to-header 1)))
+
+    (and (get-buffer "*Score Help*")
+	 (progn
+	   (kill-buffer "*Score Help*")
+	   (and gnus-score-help-winconf
+		(set-window-configuration gnus-score-help-winconf))))
+
+    (or (setq entry (assq (downcase hchar) char-to-header))
+	(progn
+	  (ding)
+	  (setq end t)
+	  (if mimic (message "%c %c" prefix hchar) (message ""))))
+    (if (or end (/= (downcase hchar) hchar))
+	(progn
+	  ;; This was a majuscle, so we end reading and set the defaults.
+	  (if mimic (message "%c %c" prefix hchar) (message ""))
+	  (setq type nil
+		temporary (current-time-string)))
+
+      ;; We continue reading - the type.
+      (while (not tchar)
+	(if mimic
+	    (progn
+	      (sit-for 1)
+	      (message "%c %c-" prefix hchar))
+	  (message "%s header '%s' with match type (%s?): "
+		   (if increase "Increase" "Lower")
+		   (nth 1 entry)
+		   (mapconcat (lambda (s) 
+				(if (eq (nth 4 entry) 
+					(nth 3 s))
+				    (char-to-string (car s))
+				  ""))
+			      char-to-type "")))
+	(setq tchar (read-char))
+	(if (not (or (= tchar ??) (= tchar ?\C-h)))
+	    ()
+	  (setq tchar nil)
+	  (gnus-score-insert-help "Match type" char-to-type 2)))
+
+      (and (get-buffer "*Score Help*")
+	   (progn
+	     (and gnus-score-help-winconf
+		  (set-window-configuration gnus-score-help-winconf))
+	     (kill-buffer "*Score Help*")))
+      
+      (or (setq type (nth 1 (assq (downcase tchar) char-to-type)))
+	  (progn
+	    (ding)
+	    (if mimic (message "%c %c" prefix hchar) (message ""))
+	    (setq end t)))
+      (if (or end (/= (downcase tchar) tchar))
+	  (progn
+	    ;; It was a majuscle, so we end reading and the the default.
+	    (if mimic (message "%c %c %c" prefix hchar tchar)
+	      (message ""))
+	    (setq temporary (current-time-string)))
+
+	;; We continue reading.
+	(while (not pchar)
+	  (if mimic
+	      (progn
+		(sit-for 1)
+		(message "%c %c %c-" prefix hchar tchar))
+	    (message "%s permanence (%s?): " (if increase "Increase" "Lower")
+		     (mapconcat (lambda (s) (char-to-string (car s)))
+				char-to-perm "")))
+	  (setq pchar (read-char))
+	  (if (not (or (= pchar ??) (= pchar ?\C-h)))
+	      ()
+	    (setq pchar nil)
+	    (gnus-score-insert-help "Match permanence" char-to-perm 2)))
+
+	(and (get-buffer "*Score Help*")
+	     (progn
+	       (and gnus-score-help-winconf
+		    (set-window-configuration gnus-score-help-winconf))
+	       (kill-buffer "*Score Help*")))
+
+	(if mimic (message "%c %c %c" prefix hchar tchar pchar)
+	  (message ""))
+	(if (setq temporary (nth 1 (assq pchar char-to-perm)))
+	    ()
+	  (ding)
+	  (setq end t)
+	  (if mimic 
+	      (message "%c %c %c %c" prefix hchar tchar pchar)
+	    (message "")))))
+
+    ;; We have all the data, so we enter this score.
+    (if end
+	()
+      (gnus-summary-score-entry
+       (nth 1 entry)			; Header
+       (if (string= (nth 2 entry) "") ""
+	 (gnus-summary-header (or (nth 2 entry) (nth 1 entry)))) ; Match
+       type				; Type
+       (if (eq 's score) nil score)     ; Score
+       (if (eq 'perm temporary)         ; Temp
+           nil
+         temporary)
+       (not (nth 3 entry)))		; Prompt
+      )))
+  
+(defun gnus-score-insert-help (string alist idx)
+  (setq gnus-score-help-winconf (current-window-configuration))
+  (save-excursion
+    (set-buffer (get-buffer-create "*Score Help*"))
+    (buffer-disable-undo (current-buffer))
+    (delete-windows-on (current-buffer))
+    (erase-buffer)
+    (insert string ":\n\n")
+    (let ((max -1)
+	  (list alist)
+	  (i 0)
+	  n width pad format)
+      ;; find the longest string to display
+      (while list
+	(setq n (length (nth idx (car list))))
+	(or (> max n)
+	    (setq max n))
+	(setq list (cdr list)))
+      (setq max (+ max 4))		; %c, `:', SPACE, a SPACE at end
+      (setq n (/ (window-width) max))	; items per line
+      (setq width (/ (window-width) n)) ; width of each item
+      ;; insert `n' items, each in a field of width `width' 
+      (while alist
+	(if (< i n)
+	    ()
+	  (setq i 0)
+	  (delete-char -1)		; the `\n' takes a char
+	  (insert "\n"))
+	(setq pad (- width 3))
+	(setq format (concat "%c: %-" (int-to-string pad) "s"))
+	(insert (format format (car (car alist)) (nth idx (car alist))))
+	(setq alist (cdr alist))
+	(setq i (1+ i))))
+    ;; display ourselves in a small window at the bottom
+    (appt-select-lowest-window)
+    (split-window)
+    (pop-to-buffer "*Score Help*")
+    (shrink-window-if-larger-than-buffer)
+    (select-window (get-buffer-window gnus-summary-buffer))))
+  
+(defun gnus-summary-header (header &optional no-err)
+  ;; Return HEADER for current articles, or error.
+  (let ((article (gnus-summary-article-number))
+	headers)
+    (if article
+	(if (and (setq headers (gnus-get-header-by-number article))
+		 (vectorp headers))
+	    (aref headers (nth 1 (assoc header gnus-header-index)))
+	  (if no-err
+	      nil
+	    (error "Pseudo-articles can't be scored")))
+      (if no-err
+	  (error "No article on current line")
+	nil))))
+
+(defun gnus-summary-score-entry 
+  (header match type score date &optional prompt silent)
+  "Enter score file entry.
+HEADER is the header being scored.
+MATCH is the string we are looking for.
+TYPE is the match type: substring, regexp, exact, fuzzy.
+SCORE is the score to add.
+DATE is the expire date, or nil for no expire, or 'now for immediate expire.
+If optional argument `PROMPT' is non-nil, allow user to edit match.
+If optional argument `SILENT' is nil, show effect of score entry."
+  (interactive
+   (list (completing-read "Header: "
+			  gnus-header-index
+			  (lambda (x) (fboundp (nth 2 x)))
+			  t)
+	 (read-string "Match: ")
+	 (if (y-or-n-p "Use regexp match? ") 'r 's)
+	 (and current-prefix-arg
+	      (prefix-numeric-value current-prefix-arg))
+	 (cond ((not (y-or-n-p "Add to score file? "))
+		'now)
+	       ((y-or-n-p "Expire kill? ")
+		(current-time-string))
+	       (t nil))))
+  ;; Regexp is the default type.
+  (if (eq type t) (setq type 'r))
+  ;; Simplify matches...
+  (cond ((or (eq type 'r) (eq type 's) (eq type nil))
+	 (setq match (if match (gnus-simplify-subject-re match) "")))
+	((eq type 'f)
+	 (setq match (gnus-simplify-subject-fuzzy match))))
+  (let ((score (gnus-score-default score))
+	(header (downcase header)))
+    (and prompt (setq match (read-string 
+			     (format "Match %s on %s, %s: " 
+				     (cond ((eq date 'now)
+					    "now")
+					   ((stringp date)
+					    "temp")
+					   (t "permanent"))
+				     header
+				     (if (< score 0) "lower" "raise"))
+			     (if (numberp match)
+				 (int-to-string match)
+			       match))))
+    (and (>= (nth 1 (assoc header gnus-header-index)) 0)
+	 (eq (nth 2 (assoc header gnus-header-index)) 'gnus-score-string)
+	 (not silent)
+	 (gnus-summary-score-effect header match type score))
+
+    ;; If this is an integer comparison, we transform from string to int. 
+    (and (eq (nth 2 (assoc header gnus-header-index)) 'gnus-score-integer)
+	 (setq match (string-to-int match)))
+
+    (if (eq date 'now)
+	()
+      (and (= score gnus-score-interactive-default-score)
+	   (setq score nil))
+      (let ((new (cond 
+		  (type
+		   (list match score (and date (gnus-day-number date)) type))
+		  (date
+		   (list match score (gnus-day-number date)))
+		  (score
+		   (list match score))
+		  (t
+		   (list match))))
+	    (old (gnus-score-get header))
+	    elem)
+	;; We see whether we can collapse some score entries.
+	;; This isn't quite correct, because there may be more elements
+	;; later on with the same key that have matching elems... Hm.
+	(if (and old
+		 (setq elem (assoc match old))
+		 (eq (nth 3 elem) (nth 3 new))
+		 (or (and (numberp (nth 2 elem)) (numberp (nth 2 new)))
+		     (and (not (nth 2 elem)) (not (nth 2 new)))))
+	    ;; Yup, we just add this new score to the old elem.
+	    (setcar (cdr elem) (+ (or (nth 1 elem) 
+				      gnus-score-interactive-default-score)
+				  (or (nth 1 new)
+				      gnus-score-interactive-default-score)))
+	  ;; Nope, we have to add a new elem.
+	  (gnus-score-set header (if old (cons new old) (list new)))))
+      (gnus-score-set 'touched '(t)))))
+
+(defun gnus-summary-score-effect (header match type score)
+  "Simulate the effect of a score file entry.
+HEADER is the header being scored.
+MATCH is the string we are looking for.
+TYPE is a flag indicating if it is a regexp or substring.
+SCORE is the score to add."
+  (interactive (list (completing-read "Header: "
+				      gnus-header-index
+				      (lambda (x) (fboundp (nth 2 x)))
+				      t)
+		     (read-string "Match: ")
+		     (y-or-n-p "Use regexp match? ")
+		     (prefix-numeric-value current-prefix-arg)))
+  (save-excursion
+    (or (and (stringp match) (> (length match) 0))
+	(error "No match"))
+    (goto-char (point-min))
+    (let ((regexp (cond ((eq type 'f)
+			 (gnus-simplify-subject-fuzzy match))
+			(type match)
+			(t (concat "\\`.*" (regexp-quote match) ".*\\'")))))
+      (while (not (eobp))
+	(let ((content (gnus-summary-header header 'noerr))
+	      (case-fold-search t))
+	  (and content
+	       (if (if (eq type 'f)
+		       (string-equal (gnus-simplify-subject-fuzzy content)
+				     regexp)
+		     (string-match regexp content))
+		   (gnus-summary-raise-score score))))
+	(beginning-of-line 2)))))
+
+(defun gnus-summary-score-crossposting (score date)
+  ;; Enter score file entry for current crossposting.
+  ;; SCORE is the score to add.
+  ;; DATE is the expire date.
+  (let ((xref (gnus-summary-header "xref"))
+	(start 0)
+	group)
+    (or xref (error "This article is not crossposted"))
+    (while (string-match " \\([^ \t]+\\):" xref start)
+      (setq start (match-end 0))
+      (if (not (string= 
+		(setq group 
+		      (substring xref (match-beginning 1) (match-end 1)))
+		gnus-newsgroup-name))
+	  (gnus-summary-score-entry
+	   "xref" (concat " " group ":") nil score date t)))))
+
+
+;;;
+;;; Gnus Score Files
+;;;
+
+;; All score code written by Per Abrahamsen <abraham@iesd.auc.dk>.
+
+;; Added by Per Abrahamsen <amanda@iesd.auc.dk>.
+(defun gnus-score-set-mark-below (score)
+  "Automatically mark articles with score below SCORE as read."
+  (interactive 
+   (list (or (and current-prefix-arg (prefix-numeric-value current-prefix-arg))
+	     (string-to-int (read-string "Mark below: ")))))
+  (setq score (or score gnus-summary-default-score 0))
+  (gnus-score-set 'mark (list score))
+  (gnus-score-set 'touched '(t))
+  (setq gnus-summary-mark-below score)
+  (gnus-summary-update-lines))
+
+(defun gnus-score-set-expunge-below (score)
+  "Automatically expunge articles with score below SCORE."
+  (interactive 
+   (list (or (and current-prefix-arg (prefix-numeric-value current-prefix-arg))
+	     (string-to-int (read-string "Expunge below: ")))))
+  (setq score (or score gnus-summary-default-score 0))
+  (gnus-score-set 'expunge (list score))
+  (gnus-score-set 'touched '(t)))
+
+(defun gnus-score-set (symbol value &optional alist)
+  ;; Set SYMBOL to VALUE in ALIST.
+  (let* ((alist 
+	  (or alist 
+	      gnus-score-alist
+	      (progn
+		(gnus-score-load (gnus-score-file-name gnus-newsgroup-name))
+		gnus-score-alist)))
+	 (entry (assoc symbol alist)))
+    (cond ((gnus-score-get 'read-only alist)
+	   ;; This is a read-only score file, so we do nothing.
+	   )
+	  (entry
+	   (setcdr entry value))
+	  ((null alist)
+	   (error "Empty alist"))
+	  (t
+	   (setcdr alist
+		   (cons (cons symbol value) (cdr alist)))))))
+
+(defun gnus-score-get (symbol &optional alist)
+  ;; Get SYMBOL's definition in ALIST.
+  (cdr (assoc symbol 
+	      (or alist 
+		  gnus-score-alist
+		  (progn
+		    (gnus-score-load 
+		     (gnus-score-file-name gnus-newsgroup-name))
+		    gnus-score-alist)))))
+
+(defun gnus-score-change-score-file (file)
+  "Change current score alist."
+  (interactive 
+   (list (read-file-name "Edit score file: " gnus-kill-files-directory)))
+  (gnus-score-load-file file)
+  (gnus-set-mode-line 'summary))
+
+(defun gnus-score-edit-alist (file)
+  "Edit the current score alist."
+  (interactive (list gnus-current-score-file))
+  (let ((winconf (current-window-configuration)))
+    (and (buffer-name gnus-summary-buffer) (gnus-score-save))
+    (setq gnus-score-edit-buffer (find-file-noselect file))
+    (gnus-configure-windows 'edit-score)
+    (gnus-score-mode)
+    (make-local-variable 'gnus-prev-winconf)
+    (setq gnus-prev-winconf winconf))
+  (gnus-message 
+   4 (substitute-command-keys 
+      "\\<gnus-score-mode-map>\\[gnus-score-edit-done] to save edits")))
+  
+(defun gnus-score-edit-file (file)
+  "Edit a score file."
+  (interactive 
+   (list (read-file-name "Edit score file: " gnus-kill-files-directory)))
+  (and (buffer-name gnus-summary-buffer) (gnus-score-save))
+  (let ((winconf (current-window-configuration)))
+    (setq gnus-score-edit-buffer (find-file-noselect file))
+    (gnus-configure-windows 'edit-score)
+    (gnus-score-mode)
+    (make-local-variable 'gnus-prev-winconf)
+    (setq gnus-prev-winconf winconf))
+  (gnus-message 
+   4 (substitute-command-keys 
+      "\\<gnus-score-mode-map>\\[gnus-score-edit-done] to save edits")))
+  
+(defun gnus-score-load-file (file)
+  ;; Load score file FILE.  Returns a list a retrieved score-alists.
+  (setq gnus-kill-files-directory (or gnus-kill-files-directory "~/News/"))
+  (let* ((file (expand-file-name 
+		(or (and (string-match
+			  (concat "^" (expand-file-name
+				       gnus-kill-files-directory)) 
+			  (expand-file-name file))
+			 file)
+		    (concat gnus-kill-files-directory file))))
+	 (cached (assoc file gnus-score-cache))
+	 (global (member file gnus-internal-global-score-files))
+	 lists alist)
+    (if cached
+	;; The score file was already loaded.
+	(setq alist (cdr cached))
+      ;; We load the score file.
+      (setq gnus-score-alist nil)
+      (setq alist (gnus-score-load-score-alist file))
+      ;; We add '(touched) to the alist to signify that it hasn't been
+      ;; touched (yet). 
+      (or (assq 'touched alist) (setq alist (cons (list 'touched nil) alist)))
+      ;; If it is a global score file, we make it read-only.
+      (and global
+	   (not (assq 'read-only alist))
+	   (setq alist (cons (list 'read-only t) alist)))
+      ;; Update cache.
+      (setq gnus-score-cache
+	    (cons (cons file alist) gnus-score-cache)))
+    ;; If there are actual scores in the alist, we add it to the
+    ;; return value of this function.
+    (if (memq t (mapcar (lambda (e) (stringp (car e))) alist))
+	(setq lists (list alist)))
+    ;; Treat the other possible atoms in the score alist.
+    (let ((mark (car (gnus-score-get 'mark alist)))
+	  (expunge (car (gnus-score-get 'expunge alist)))
+	  (mark-and-expunge (car (gnus-score-get 'mark-and-expunge alist)))
+	  (files (gnus-score-get 'files alist))
+	  (exclude-files (gnus-score-get 'exclude-files alist))
+          (orphan (car (gnus-score-get 'orphan alist)))
+	  (adapt (gnus-score-get 'adapt alist))
+	  (local (gnus-score-get 'local alist))
+	  (eval (car (gnus-score-get 'eval alist))))
+      ;; We do not respect eval and files atoms from global score
+      ;; files. 
+      (and files (not global)
+	   (setq lists (apply 'append lists
+			      (mapcar (lambda (file)
+					(gnus-score-load-file file)) 
+				      files))))
+      (and eval (not global) (eval eval))
+      ;; We then expand any exclude-file directives.
+      (setq gnus-scores-exclude-files 
+	    (nconc 
+	     (mapcar 
+	      (lambda (sfile) 
+		(expand-file-name sfile (file-name-directory file)))
+	      exclude-files) gnus-scores-exclude-files))
+      (if (not local)
+	  ()
+	(save-excursion
+	  (set-buffer gnus-summary-buffer)
+	  (while local
+	    (and (consp (car local))
+		 (symbolp (car (car local)))
+		 (progn
+		   (make-local-variable (car (car local)))
+		   (set (car (car local)) (nth 1 (car local)))))
+	    (setq local (cdr local)))))
+      (if orphan (setq gnus-orphan-score orphan))
+      (setq gnus-adaptive-score-alist
+	    (cond ((equal adapt '(t))
+		   (setq gnus-newsgroup-adaptive t)
+		   gnus-default-adaptive-score-alist)
+		  ((equal adapt '(ignore))
+		   (setq gnus-newsgroup-adaptive nil))
+		  ((consp adapt)
+		   (setq gnus-newsgroup-adaptive t)
+		   adapt)
+		  (t
+		   ;;(setq gnus-newsgroup-adaptive gnus-use-adaptive-scoring)
+		   gnus-default-adaptive-score-alist)))
+      (setq gnus-summary-mark-below 
+	    (or mark mark-and-expunge gnus-summary-mark-below))
+      (setq gnus-summary-expunge-below 
+	    (or expunge mark-and-expunge gnus-summary-expunge-below)))
+    (setq gnus-current-score-file file)
+    (setq gnus-score-alist alist)
+    lists))
+
+(defun gnus-score-load (file)
+  ;; Load score FILE.
+  (let ((cache (assoc file gnus-score-cache)))
+    (if cache
+	(setq gnus-score-alist (cdr cache))
+      (setq gnus-score-alist nil)
+      (gnus-score-load-score-alist file)
+      (or gnus-score-alist
+	  (setq gnus-score-alist (copy-alist '((touched nil)))))
+      (setq gnus-score-cache
+	    (cons (cons file gnus-score-alist) gnus-score-cache)))))
+
+(defun gnus-score-remove-from-cache (file)
+  (setq gnus-score-cache 
+	(delq (assoc file gnus-score-cache) gnus-score-cache)))
+
+(defun gnus-score-load-score-alist (file)
+  (let (alist)
+    (if (file-readable-p file)
+	(progn
+	  (save-excursion
+	    (gnus-set-work-buffer)
+	    (insert-file-contents file)
+	    (goto-char (point-min))
+	    ;; Only do the loading if the score file isn't empty.
+	    (if (save-excursion (re-search-forward "[()0-9a-zA-Z]" nil t))
+		(setq alist
+		      (condition-case ()
+			  (read (current-buffer))
+			(error 
+			 (progn
+			   (gnus-message 3 "Problem with score file %s" file)
+			   (ding) 
+			   (sit-for 2)
+			   nil))))))
+	  (if (eq (car alist) 'setq)
+	      (setq gnus-score-alist (gnus-score-transform-old-to-new alist))
+	    (setq gnus-score-alist alist))
+	  (setq gnus-score-alist
+		(gnus-score-check-syntax gnus-score-alist file)))
+      (setq gnus-score-alist nil))))
+
+(defun gnus-score-check-syntax (alist file)
+  (cond 
+   ((null alist)
+    nil)
+   ((not (consp alist))
+    (gnus-message 1 "Score file is not a list: %s" file)
+    (ding)
+    nil)
+   (t
+    (let ((a alist)
+	  err)
+      (while (and a (not err))
+	(cond ((not (listp (car a)))
+	       (gnus-message 3 "Illegal score element %s in %s" (car a) file)
+	       (setq err t))
+	      ((and (stringp (car (car a)))
+		    (not (listp (nth 1 (car a)))))
+	       (gnus-message 3 "Illegal header match %s in %s" (nth 1 (car a)) file)
+	       (setq err t))
+	      (t
+	       (setq a (cdr a)))))
+      (if err
+	  (progn
+	    (ding)
+	    nil)
+	alist)))))    
+
+(defun gnus-score-transform-old-to-new (alist)
+  (let* ((alist (nth 2 alist))
+	 out entry)
+    (if (eq (car alist) 'quote)
+	(setq alist (nth 1 alist)))
+    (while alist
+      (setq entry (car alist))
+      (if (stringp (car entry))
+	  (let ((scor (cdr entry)))
+	    (setq out (cons entry out))
+	    (while scor
+	      (setcar scor
+		      (list (car (car scor)) (nth 2 (car scor))
+			    (and (nth 3 (car scor))
+				 (gnus-day-number (nth 3 (car scor))))
+			    (if (nth 1 (car scor)) 'r 's)))
+	      (setq scor (cdr scor))))
+	(setq out (cons (if (not (listp (cdr entry))) 
+			    (list (car entry) (cdr entry))
+			  entry)
+			out)))
+      (setq alist (cdr alist)))
+    (cons (list 'touched t) (nreverse out))))
+  
+(defun gnus-score-save ()
+  ;; Save all score information.
+  (let ((cache gnus-score-cache))
+    (save-excursion
+      (setq gnus-score-alist nil)
+      (set-buffer (get-buffer-create "*Score*"))
+      (buffer-disable-undo (current-buffer))
+      (let (entry score file)
+	(while cache
+	  (setq entry (car cache)
+		cache (cdr cache)
+		file (car entry)
+		score (cdr entry))
+	  (if (or (not (equal (gnus-score-get 'touched score) '(t)))
+		  (gnus-score-get 'read-only score)
+		  (and (file-exists-p file)
+		       (not (file-writable-p file))))
+	      ()
+	    (setq score (setcdr entry (delq (assq 'touched score) score)))
+	    (erase-buffer)
+	    (let (emacs-lisp-mode-hook)
+	      (if (string-match (concat gnus-adaptive-file-suffix "$") file)
+		  ;; This is an adaptive score file, so we do not run
+		  ;; it through `pp'.  These files can get huge, and
+		  ;; are not meant to be edited by human hands.
+		  (insert (format "%S" score))
+		;; This is a normal score file, so we print it very
+		;; prettily. 
+		(pp score (current-buffer))))
+	    (if (not (gnus-make-directory (file-name-directory file)))
+		()
+	      ;; If the score file is empty, we delete it.
+	      (if (zerop (buffer-size))
+		  (delete-file file)
+		;; There are scores, so we write the file. 
+		(and (file-writable-p file)
+		     (write-region (point-min) (point-max) 
+				   file nil 'silent)))))))
+      (kill-buffer (current-buffer)))))
+  
+(defun gnus-score-headers (score-files &optional trace)
+  ;; Score `gnus-newsgroup-headers'.
+  (let (scores)
+    ;; PLM: probably this is not the best place to clear orphan-score
+    (setq gnus-orphan-score nil)
+    (setq gnus-scores-articles nil)
+    (setq gnus-scores-exclude-files nil)
+    ;; Load the score files.
+    (while score-files
+      (if (stringp (car score-files))
+	  ;; It is a string, which means that it's a score file name,
+	  ;; so we load the score file and add the score alist to
+	  ;; the list of alists.
+	  (setq scores (nconc (gnus-score-load-file (car score-files)) scores))
+	;; It is an alist, so we just add it to the list directly.
+	(setq scores (nconc (car score-files) scores)))
+      (setq score-files (cdr score-files)))
+    ;; Prune the score files that are to be excluded, if any.
+    (if (not gnus-scores-exclude-files)
+	()
+      (let ((s scores)
+	    c)
+	(while s
+	  (and (setq c (rassq (car s) gnus-score-cache))
+	       (member (car c) gnus-scores-exclude-files)
+	       (setq scores (delq (car s) scores)))
+	  (setq s (cdr s)))))
+    (if (not (and gnus-summary-default-score
+		  scores
+		  (> (length gnus-newsgroup-headers)
+		     (length gnus-newsgroup-scored))))
+	()
+      (let* ((entries gnus-header-index)
+	     (now (gnus-day-number (current-time-string)))
+	     (expire (- now gnus-score-expiry-days))
+	     (headers gnus-newsgroup-headers)
+	     (current-score-file gnus-current-score-file)
+	     entry header)
+	(gnus-message 5 "Scoring...")
+	;; Create articles, an alist of the form `(HEADER . SCORE)'.
+	(while headers
+	  (setq header (car headers)
+		headers (cdr headers))
+	  ;; WARNING: The assq makes the function O(N*S) while it could
+	  ;; be written as O(N+S), where N is (length gnus-newsgroup-headers)
+	  ;; and S is (length gnus-newsgroup-scored).
+	  (or (assq (mail-header-number header) gnus-newsgroup-scored)
+	      (setq gnus-scores-articles ;Total of 2 * N cons-cells used.
+		    (cons (cons header (or gnus-summary-default-score 0))
+			  gnus-scores-articles))))
+
+	(save-excursion
+	  (set-buffer (get-buffer-create "*Headers*"))
+	  (buffer-disable-undo (current-buffer))
+
+	  ;; Set the global variant of this variable.
+	  (setq gnus-current-score-file current-score-file)
+          ;; score orphans
+          (if gnus-orphan-score 
+              (progn
+                (setq gnus-score-index 
+                      (nth 1 (assoc "references" gnus-header-index)))
+                (gnus-score-orphans gnus-orphan-score)))
+	  ;; Run each header through the score process.
+	  (while entries
+	    (setq entry (car entries)
+		  header (nth 0 entry)
+		  entries (cdr entries))
+	    (setq gnus-score-index (nth 1 (assoc header gnus-header-index)))
+	    (if (< 0 (apply 'max (mapcar
+				  (lambda (score)
+				    (length (gnus-score-get header score)))
+				  scores)))
+		(funcall (nth 2 entry) scores header now expire trace)))
+	  ;; Remove the buffer.
+	  (kill-buffer (current-buffer)))
+
+	;; Add articles to `gnus-newsgroup-scored'.
+	(while gnus-scores-articles
+	  (or (= gnus-summary-default-score (cdr (car gnus-scores-articles)))
+	      (setq gnus-newsgroup-scored
+		    (cons (cons (mail-header-number 
+				 (car (car gnus-scores-articles)))
+				(cdr (car gnus-scores-articles)))
+			  gnus-newsgroup-scored)))
+	  (setq gnus-scores-articles (cdr gnus-scores-articles)))
+
+	(gnus-message 5 "Scoring...done")))))
+
+
+(defun gnus-get-new-thread-ids (articles)
+  (let ((index (nth 1 (assoc "message-id" gnus-header-index)))
+        (refind gnus-score-index)
+        id-list art this tref)
+    (while articles
+      (setq art (car articles)
+            this (aref (car art) index)
+            tref (aref (car art) refind)
+            articles (cdr articles))
+      (if (string-equal tref "")        ;no references line
+          (setq id-list (cons this id-list))))
+    id-list))
+
+;; Orphan functions written by plm@atcmp.nl (Peter Mutsaers).
+(defun gnus-score-orphans (score)
+  (let ((new-thread-ids (gnus-get-new-thread-ids gnus-scores-articles))
+        alike articles art arts this last this-id)
+    
+    (setq gnus-scores-articles (sort gnus-scores-articles 'gnus-score-string<)
+	  articles gnus-scores-articles)
+
+    ;;more or less the same as in gnus-score-string
+    (erase-buffer)
+    (while articles
+      (setq art (car articles)
+            this (aref (car art) gnus-score-index)
+            articles (cdr articles))
+      ;;completely skip if this is empty (not a child, so not an orphan)
+      (if (not (string= this ""))
+          (if (equal last this)
+              ;; O(N*H) cons-cells used here, where H is the number of
+              ;; headers.
+              (setq alike (cons art alike))
+            (if last
+                (progn
+                  ;; Insert the line, with a text property on the
+                  ;; terminating newline refering to the articles with
+                  ;; this line.
+                  (insert last ?\n)
+                  (put-text-property (1- (point)) (point) 'articles alike)))
+            (setq alike (list art)
+                  last this))))
+    (and last                           ; Bwadr, duplicate code.
+         (progn
+           (insert last ?\n)                    
+           (put-text-property (1- (point)) (point) 'articles alike)))
+
+    ;; PLM: now delete those lines that contain an entry from new-thread-ids
+    (while new-thread-ids
+      (setq this-id (car new-thread-ids)
+            new-thread-ids (cdr new-thread-ids))
+      (goto-char (point-min))
+      (while (search-forward this-id nil t)
+        ;; found a match. remove this line
+	(beginning-of-line)
+	(kill-line 1)))
+
+    ;; now for each line: update its articles with score by moving to
+    ;; every end-of-line in the buffer and read the articles property
+    (goto-char (point-min))
+    (while (eq 0 (progn
+                   (end-of-line)
+                   (setq arts (get-text-property (point) 'articles))
+                   (while arts
+                     (setq art (car arts)
+                           arts (cdr arts))
+                     (setcdr art (+ score (cdr art))))
+                   (forward-line))))))
+             
+
+(defun gnus-score-integer (scores header now expire &optional trace)
+  (let ((gnus-score-index (nth 1 (assoc header gnus-header-index)))
+	entries alist)
+
+    ;; Find matches.
+    (while scores
+      (setq alist (car scores)
+	    scores (cdr scores)
+	    entries (assoc header alist))
+      (while (cdr entries)		;First entry is the header index.
+	(let* ((rest (cdr entries))		
+	       (kill (car rest))
+	       (match (nth 0 kill))
+	       (type (or (nth 3 kill) '>))
+	       (score (or (nth 1 kill) gnus-score-interactive-default-score))
+	       (date (nth 2 kill))
+	       (found nil)
+	       (match-func (if (or (eq type '>) (eq type '<) (eq type '<=)
+				   (eq type '>=) (eq type '=))
+			       type
+			     (error "Illegal match type: %s" type)))
+	       (articles gnus-scores-articles))
+	  ;; Instead of doing all the clever stuff that
+	  ;; `gnus-score-string' does to minimize searches and stuff,
+	  ;; I will assume that people generally will put so few
+	  ;; matches on numbers that any cleverness will take more
+	  ;; time than one would gain.
+	  (while articles
+	    (and (funcall match-func 
+			  (or (aref (car (car articles)) gnus-score-index) 0)
+			  match)
+		 (progn
+		   (and trace (setq gnus-score-trace 
+				    (cons (cons (car (car articles)) kill)
+					  gnus-score-trace)))
+		   (setq found t)
+		   (setcdr (car articles) (+ score (cdr (car articles))))))
+	    (setq articles (cdr articles)))
+	  ;; Update expire date
+	  (cond ((null date))		;Permanent entry.
+		(found			;Match, update date.
+		 (gnus-score-set 'touched '(t) alist)
+		 (setcar (nthcdr 2 kill) now))
+		((< date expire)	;Old entry, remove.
+		 (gnus-score-set 'touched '(t) alist)
+		 (setcdr entries (cdr rest))
+		 (setq rest entries)))
+	  (setq entries rest))))))
+
+(defun gnus-score-date (scores header now expire &optional trace)
+  (let ((gnus-score-index (nth 1 (assoc header gnus-header-index)))
+	entries alist)
+
+    ;; Find matches.
+    (while scores
+      (setq alist (car scores)
+	    scores (cdr scores)
+	    entries (assoc header alist))
+      (while (cdr entries)		;First entry is the header index.
+	(let* ((rest (cdr entries))		
+	       (kill (car rest))
+	       (match (timezone-make-date-sortable (nth 0 kill)))
+	       (type (or (nth 3 kill) 'before))
+	       (score (or (nth 1 kill) gnus-score-interactive-default-score))
+	       (date (nth 2 kill))
+	       (found nil)
+	       (match-func 
+		(cond ((eq type 'after) 'string<)
+		      ((eq type 'before) 'gnus-string>)
+		      ((eq type 'at) 'string=)
+		      (t (error "Illegal match type: %s" type))))
+	       (articles gnus-scores-articles)
+	       l)
+	  ;; Instead of doing all the clever stuff that
+	  ;; `gnus-score-string' does to minimize searches and stuff,
+	  ;; I will assume that people generally will put so few
+	  ;; matches on numbers that any cleverness will take more
+	  ;; time than one would gain.
+	  (while articles
+	    (and
+	     (setq l (aref (car (car articles)) gnus-score-index))
+	     (funcall match-func match (timezone-make-date-sortable l))
+	     (progn
+	       (and trace (setq gnus-score-trace 
+				(cons (cons (car (car articles)) kill)
+				      gnus-score-trace)))
+	       (setq found t)
+	       (setcdr (car articles) (+ score (cdr (car articles))))))
+	    (setq articles (cdr articles)))
+	  ;; Update expire date
+	  (cond ((null date))		;Permanent entry.
+		(found			;Match, update date.
+		 (gnus-score-set 'touched '(t) alist)
+		 (setcar (nthcdr 2 kill) now))
+		((< date expire)	;Old entry, remove.
+		 (gnus-score-set 'touched '(t) alist)
+		 (setcdr entries (cdr rest))
+		 (setq rest entries)))
+	  (setq entries rest))))))
+
+(defun gnus-score-body (scores header now expire &optional trace)
+  (save-excursion
+    (set-buffer nntp-server-buffer)
+    (save-restriction
+      (let* ((buffer-read-only nil)
+	     (articles gnus-scores-articles)
+	     (last (mail-header-number (car (car gnus-scores-articles))))
+	     (all-scores scores)
+	     (request-func (cond ((string= "head" (downcase header))
+				  'gnus-request-head)
+				 ((string= "body" (downcase header))
+				  'gnus-request-body)
+				 (t 'gnus-request-article)))
+	     entries alist ofunc article)
+	;; Not all backends support partial fetching.  In that case,
+	;; we just fetch the entire article.
+	(or (gnus-check-backend-function 
+	     (and (string-match "^gnus-" (symbol-name request-func))
+		  (intern (substring (symbol-name request-func)
+				     (match-end 0))))
+	     gnus-newsgroup-name)
+	    (progn
+	      (setq ofunc request-func)
+	      (setq request-func 'gnus-request-article)))
+	(while articles
+	  (setq article (mail-header-number (car (car articles))))
+	  (gnus-message 7 "Scoring on article %s of %s..." article last)
+	  (if (not (funcall request-func article gnus-newsgroup-name))
+	      ()
+	    (widen)
+	    (goto-char (point-min))
+	    ;; If just parts of the article is to be searched, but the
+	    ;; backend didn't support partial fetching, we just narrow
+	    ;; to the relevant parts.
+	    (if ofunc
+		(if (eq ofunc 'gnus-request-head)
+		    (narrow-to-region
+		     (point)
+		     (or (search-forward "\n\n" nil t) (point-max)))
+		  (narrow-to-region
+		   (or (search-forward "\n\n" nil t) (point))
+		   (point-max))))
+	    (setq scores all-scores)
+	    ;; Find matches.
+	    (while scores
+	      (setq alist (car scores)
+		    scores (cdr scores)
+		    entries (assoc header alist))
+	      (while (cdr entries)	;First entry is the header index.
+		(let* ((rest (cdr entries))		
+		       (kill (car rest))
+		       (match (nth 0 kill))
+		       (type (or (nth 3 kill) 's))
+		       (score (or (nth 1 kill) 
+				  gnus-score-interactive-default-score))
+		       (date (nth 2 kill))
+		       (found nil)
+		       (case-fold-search 
+			(not (or (eq type 'R) (eq type 'S)
+				 (eq type 'Regexp) (eq type 'String))))
+		       (search-func 
+			(cond ((or (eq type 'r) (eq type 'R)
+				   (eq type 'regexp) (eq type 'Regexp))
+			       're-search-forward)
+			      ((or (eq type 's) (eq type 'S)
+				   (eq type 'string) (eq type 'String))
+			       'search-forward)
+			      (t
+			       (error "Illegal match type: %s" type)))))
+		  (goto-char (point-min))
+		  (if (funcall search-func match nil t)
+		      ;; Found a match, update scores.
+		      (progn
+			(setcdr (car articles) (+ score (cdr (car articles))))
+			(setq found t)
+			(and trace (setq gnus-score-trace 
+					 (cons (cons (car (car articles)) kill)
+					       gnus-score-trace)))))
+		  ;; Update expire date
+		  (cond ((null date))	;Permanent entry.
+			(found		;Match, update date.
+			 (gnus-score-set 'touched '(t) alist)
+			 (setcar (nthcdr 2 kill) now))
+			((< date expire) ;Old entry, remove.
+			 (gnus-score-set 'touched '(t) alist)
+			 (setcdr entries (cdr rest))
+			 (setq rest entries)))
+		  (setq entries rest)))))
+	  (setq articles (cdr articles)))))))
+
+
+
+(defun gnus-score-followup (scores header now expire &optional trace)
+  ;; Insert the unique article headers in the buffer.
+  (let ((gnus-score-index (nth 1 (assoc header gnus-header-index)))
+	(current-score-file gnus-current-score-file)
+	(all-scores scores)
+	;; gnus-score-index is used as a free variable.
+	alike last this art entries alist articles)
+
+    ;; Change score file to the adaptive score file.  All entries that
+    ;; this function makes will be put into this file.
+    (gnus-score-load-file (gnus-score-file-name 
+			   gnus-newsgroup-name gnus-adaptive-file-suffix))
+
+    (setq gnus-scores-articles (sort gnus-scores-articles 'gnus-score-string<)
+	  articles gnus-scores-articles)
+
+    (erase-buffer)
+    (while articles
+      (setq art (car articles)
+	    this (aref (car art) gnus-score-index)
+	    articles (cdr articles))
+      (if (equal last this)
+	  (setq alike (cons art alike))
+	(if last
+	    (progn
+	      (insert last ?\n)
+	      (put-text-property (1- (point)) (point) 'articles alike)))
+	(setq alike (list art)
+	      last this)))
+    (and last				; Bwadr, duplicate code.
+	 (progn
+	   (insert last ?\n)			
+	   (put-text-property (1- (point)) (point) 'articles alike)))
+  
+    ;; Find matches.
+    (while scores
+      (setq alist (car scores)
+	    scores (cdr scores)
+	    entries (assoc header alist))
+      (while (cdr entries)		;First entry is the header index.
+	(let* ((rest (cdr entries))		
+	       (kill (car rest))
+	       (match (nth 0 kill))
+	       (type (or (nth 3 kill) 's))
+	       (score (or (nth 1 kill) gnus-score-interactive-default-score))
+	       (date (nth 2 kill))
+	       (found nil)
+	       (mt (aref (symbol-name type) 0))
+	       (case-fold-search 
+		(not (or (= mt ?R) (= mt ?S) (= mt ?E) (= mt ?F))))
+	       (dmt (downcase mt))
+	       (search-func 
+		(cond ((= dmt ?r) 're-search-forward)
+		      ((or (= dmt ?e) (= dmt ?s) (= dmt ?f)) 'search-forward)
+		      (t (error "Illegal match type: %s" type))))
+	       arts art)
+	  (goto-char (point-min))
+	  (if (= dmt ?e)
+	      (while (funcall search-func match nil t)
+		(and (= (progn (beginning-of-line) (point))
+			(match-beginning 0))
+		     (= (progn (end-of-line) (point))
+			(match-end 0))
+		     (progn
+		       (setq found (setq arts (get-text-property 
+					       (point) 'articles)))
+		       ;; Found a match, update scores.
+		       (while arts
+			 (setq art (car arts)
+			       arts (cdr arts))
+			 (gnus-score-add-followups 
+			  (car art) score all-scores)))))
+	    (while (funcall search-func match nil t)
+	      (end-of-line)
+	      (setq found (setq arts (get-text-property (point) 'articles)))
+	      ;; Found a match, update scores.
+	      (while arts
+		(setq art (car arts)
+		      arts (cdr arts))
+		(gnus-score-add-followups (car art) score all-scores))))
+	  ;; Update expire date
+	  (cond ((null date))		;Permanent entry.
+		(found			;Match, update date.
+		 (gnus-score-set 'touched '(t) alist)
+		 (setcar (nthcdr 2 kill) now))
+		((< date expire)	;Old entry, remove.
+		 (gnus-score-set 'touched '(t) alist)
+		 (setcdr entries (cdr rest))
+		 (setq rest entries)))
+	  (setq entries rest))))
+    ;; We change the score file back to the previous one.
+    (gnus-score-load-file current-score-file)))
+
+(defun gnus-score-add-followups (header score scores)
+  (save-excursion
+    (set-buffer gnus-summary-buffer)
+    (let* ((id (mail-header-id header))
+	   (scores (car scores))
+	   entry dont)
+      ;; Don't enter a score if there already is one.
+      (while scores
+	(setq entry (car scores))
+	(and (equal "references" (car entry))
+	     (or (null (nth 3 (car (cdr entry))))
+		 (eq 's (nth 3 (car (cdr entry)))))
+	     (progn
+	       (if (assoc id entry)
+		   (setq dont t))))
+	(setq scores (cdr scores)))
+      (or dont
+	  (gnus-summary-score-entry 
+	   "references" id 's score (current-time-string) nil t)))))
+
+
+(defun gnus-score-string (score-list header now expire &optional trace)
+  ;; Score ARTICLES according to HEADER in SCORE-LIST.
+  ;; Update matches entries to NOW and remove unmatched entried older
+  ;; than EXPIRE.
+  
+  ;; Insert the unique article headers in the buffer.
+  (let ((gnus-score-index (nth 1 (assoc header gnus-header-index)))
+	;; gnus-score-index is used as a free variable.
+	alike last this art entries alist articles scores fuzzy)
+
+    ;; Sorting the articles costs os O(N*log N) but will allow us to
+    ;; only match with each unique header.  Thus the actual matching
+    ;; will be O(M*U) where M is the number of strings to match with,
+    ;; and U is the number of unique headers.  It is assumed (but
+    ;; untested) this will be a net win because of the large constant
+    ;; factor involved with string matching.
+    (setq gnus-scores-articles (sort gnus-scores-articles 'gnus-score-string<)
+	  articles gnus-scores-articles)
+
+    (erase-buffer)
+    (while articles
+      (setq art (car articles)
+	    this (aref (car art) gnus-score-index)
+	    articles (cdr articles))
+      (if (equal last this)
+	  ;; O(N*H) cons-cells used here, where H is the number of
+	  ;; headers.
+	  (setq alike (cons art alike))
+	(if last
+	    (progn
+	      ;; Insert the line, with a text property on the
+	      ;; terminating newline refering to the articles with
+	      ;; this line.
+	      (insert last ?\n)
+	      (put-text-property (1- (point)) (point) 'articles alike)))
+	(setq alike (list art)
+	      last this)))
+    (and last				; Bwadr, duplicate code.
+	 (progn
+	   (insert last ?\n)			
+	   (put-text-property (1- (point)) (point) 'articles alike)))
+  
+    ;; Find ordinary matches.
+    (setq scores score-list) 
+    (while scores
+      (setq alist (car scores)
+	    scores (cdr scores)
+	    entries (assoc header alist))
+      (while (cdr entries)		;First entry is the header index.
+	(let* ((rest (cdr entries))		
+	       (kill (car rest))
+	       (match (nth 0 kill))
+	       (type (or (nth 3 kill) 's))
+	       (score (or (nth 1 kill) gnus-score-interactive-default-score))
+	       (date (nth 2 kill))
+	       (found nil)
+	       (mt (aref (symbol-name type) 0))
+	       (case-fold-search 
+		(not (or (= mt ?R) (= mt ?S) (= mt ?E) (= mt ?F))))
+	       (dmt (downcase mt))
+	       (search-func 
+		(cond ((= dmt ?r) 're-search-forward)
+		      ((or (= dmt ?e) (= dmt ?s) (= dmt ?f)) 'search-forward)
+		      (t (error "Illegal match type: %s" type))))
+	       arts art)
+	  (if (= dmt ?f)
+	      (setq fuzzy t)
+	    (goto-char (point-min))
+	    (if (= dmt ?e)
+		(while (and (not (eobp)) 
+			    (funcall search-func match nil t))
+		  (and (= (progn (beginning-of-line) (point))
+			  (match-beginning 0))
+		       (= (progn (end-of-line) (point))
+			  (match-end 0))
+		       (progn
+			 (setq found (setq arts (get-text-property 
+						 (point) 'articles)))
+			 ;; Found a match, update scores.
+			 (if trace
+			     (while arts
+			       (setq art (car arts)
+				     arts (cdr arts))
+			       (setcdr art (+ score (cdr art)))
+			       (setq gnus-score-trace 
+				     (cons (cons (mail-header-number
+						  (car art)) kill)
+					   gnus-score-trace)))
+			   (while arts
+			     (setq art (car arts)
+				   arts (cdr arts))
+			     (setcdr art (+ score (cdr art)))))))
+		  (forward-line 1))
+	      (and (string= match "") (setq match "\n"))
+	      (while (and (not (eobp))
+			  (funcall search-func match nil t))
+		(goto-char (match-beginning 0))
+		(end-of-line)
+		(setq found (setq arts (get-text-property (point) 'articles)))
+		;; Found a match, update scores.
+		(if trace
+		    (while arts
+		      (setq art (car arts)
+			    arts (cdr arts))
+		      (setcdr art (+ score (cdr art)))
+		      (setq gnus-score-trace 
+			    (cons (cons (mail-header-number (car art)) kill)
+				  gnus-score-trace)))
+		  (while arts
+		    (setq art (car arts)
+			  arts (cdr arts))
+		    (setcdr art (+ score (cdr art)))))
+		(forward-line 1)))
+	    ;; Update expire date
+	    (cond ((null date))		;Permanent entry.
+		  (found		;Match, update date.
+		   (gnus-score-set 'touched '(t) alist)
+		   (setcar (nthcdr 2 kill) now))
+		  ((< date expire)	;Old entry, remove.
+		   (gnus-score-set 'touched '(t) alist)
+		   (setcdr entries (cdr rest))
+		   (setq rest entries))))
+	  (setq entries rest))))
+  
+    ;; Find fuzzy matches.
+    (setq scores (and fuzzy score-list))
+    (if fuzzy (gnus-simplify-buffer-fuzzy))
+    (while scores
+      (setq alist (car scores)
+	    scores (cdr scores)
+	    entries (assoc header alist))
+      (while (cdr entries)		;First entry is the header index.
+	(let* ((rest (cdr entries))		
+	       (kill (car rest))
+	       (match (nth 0 kill))
+	       (type (or (nth 3 kill) 's))
+	       (score (or (nth 1 kill) gnus-score-interactive-default-score))
+	       (date (nth 2 kill))
+	       (found nil)
+	       (mt (aref (symbol-name type) 0))
+	       (case-fold-search 
+		(not (or (= mt ?R) (= mt ?S) (= mt ?E) (= mt ?F))))
+	       (dmt (downcase mt))
+	       (search-func 
+		(cond ((= dmt ?r) 're-search-forward)
+		      ((or (= dmt ?e) (= dmt ?s) (= dmt ?f)) 'search-forward)
+		      (t (error "Illegal match type: %s" type))))
+	       arts art)
+	  (if (/= dmt ?f)
+	      ()
+	    (goto-char (point-min))
+	    (while (and (not (eobp)) 
+			(funcall search-func match nil t))
+	      (and (= (progn (beginning-of-line) (point))
+		      (match-beginning 0))
+		   (= (progn (end-of-line) (point))
+		      (match-end 0))
+		   (progn
+		     (setq found (setq arts (get-text-property 
+					     (point) 'articles)))
+		     ;; Found a match, update scores.
+		     (if trace
+			 (while arts
+			   (setq art (car arts)
+				 arts (cdr arts))
+			   (setcdr art (+ score (cdr art)))
+			   (setq gnus-score-trace 
+				 (cons (cons (mail-header-number
+					      (car art)) kill)
+				       gnus-score-trace)))
+		       (while arts
+			 (setq art (car arts)
+			       arts (cdr arts))
+			 (setcdr art (+ score (cdr art)))))))
+	      (forward-line 1))
+	    ;; Update expire date
+	    (cond ((null date))		;Permanent entry.
+		  (found		;Match, update date.
+		   (gnus-score-set 'touched '(t) alist)
+		   (setcar (nthcdr 2 kill) now))
+		  ((< date expire)	;Old entry, remove.
+		   (gnus-score-set 'touched '(t) alist)
+		   (setcdr entries (cdr rest))
+		   (setq rest entries))))
+	  (setq entries rest))))))
+
+(defun gnus-score-string< (a1 a2)
+  ;; Compare headers in articles A2 and A2.
+  ;; The header index used is the free variable `gnus-score-index'.
+  (string-lessp (aref (car a1) gnus-score-index)
+		(aref (car a2) gnus-score-index)))
+
+(defun gnus-score-build-cons (article)
+  ;; Build a `gnus-newsgroup-scored' type cons from ARTICLE.
+  (cons (mail-header-number (car article)) (cdr article)))
+
+(defconst gnus-header-index
+  ;; Name to index alist.
+  '(("number" 0 gnus-score-integer)
+    ("subject" 1 gnus-score-string)
+    ("from" 2 gnus-score-string)
+    ("date" 3 gnus-score-date)
+    ("message-id" 4 gnus-score-string) 
+    ("references" 5 gnus-score-string) 
+    ("chars" 6 gnus-score-integer) 
+    ("lines" 7 gnus-score-integer) 
+    ("xref" 8 gnus-score-string)
+    ("head" -1 gnus-score-body)
+    ("body" -1 gnus-score-body)
+    ("all" -1 gnus-score-body)
+    ("followup" 2 gnus-score-followup)))
+
+(defun gnus-current-score-file-nondirectory (&optional score-file)
+  (let ((score-file (or score-file gnus-current-score-file)))
+    (if score-file 
+	(gnus-short-group-name (file-name-nondirectory score-file))
+      "none")))
+
+(defun gnus-score-adaptive ()
+  (save-excursion
+    (let* ((malist (gnus-copy-sequence gnus-adaptive-score-alist))
+	   (alist malist)
+	   (date (current-time-string)) 
+	   elem headers match)
+      ;; First we transform the adaptive rule alist into something
+      ;; that's faster to process.
+      (while malist
+	(setq elem (car malist))
+	(if (symbolp (car elem))
+	    (setcar elem (symbol-value (car elem))))
+	(setq elem (cdr elem))
+	(while elem
+	  (setcdr (car elem) 
+		  (cons (symbol-name (car (car elem))) (cdr (car elem))))
+	  (setcar (car elem) 
+		  (intern 
+		   (concat "gnus-header-" 
+			   (downcase (symbol-name (car (car elem)))))))
+	  (setq elem (cdr elem)))
+	(setq malist (cdr malist)))
+      ;; We change the score file to the adaptive score file.
+      (gnus-score-load-file (gnus-score-file-name 
+			     gnus-newsgroup-name gnus-adaptive-file-suffix))
+      ;; The we score away.
+      (goto-char (point-min))
+      (while (not (eobp))
+	(setq elem (cdr (assq (gnus-summary-article-mark) alist)))
+	(if (or (not elem)
+		(get-text-property (point) 'gnus-pseudo))
+	    ()
+	  (setq headers (gnus-get-header-by-number 
+			 (gnus-summary-article-number)))
+	  (while (and elem headers)
+	    (setq match (funcall (car (car elem)) headers))
+	    (gnus-summary-score-entry 
+	     (nth 1 (car elem)) match
+	     (cond
+	      ((numberp match)
+	       '=)
+	      ((equal (nth 1 (car elem)) "date")
+	       'a)
+	      (t
+	       ;; Whether we use substring or exact matches are controlled
+	       ;; here.  
+	       (if (or (not gnus-score-exact-adapt-limit)
+		       (< (length match) gnus-score-exact-adapt-limit))
+		   'e 
+		 (if (equal (nth 1 (car elem)) "subject")
+		     'f 's))))
+	     (nth 2 (car elem)) date nil t)
+	    (setq elem (cdr elem))))
+	(forward-line 1)))))
+
+(defun gnus-score-remove-lines-adaptive (marks)
+  (save-excursion
+    (let* ((malist (gnus-copy-sequence gnus-adaptive-score-alist))
+	   (alist malist)
+	   (date (current-time-string)) 
+	   (cur-score gnus-current-score-file)
+	   elem headers match)
+      ;; First we transform the adaptive rule alist into something
+      ;; that's faster to process.
+      (while malist
+	(setq elem (car malist))
+	(if (symbolp (car elem))
+	    (setcar elem (symbol-value (car elem))))
+	(setq elem (cdr elem))
+	(while elem
+	  (setcdr (car elem) 
+		  (cons (symbol-name (car (car elem))) (cdr (car elem))))
+	  (setcar (car elem) 
+		  (intern 
+		   (concat "gnus-header-" 
+			   (downcase (symbol-name (car (car elem)))))))
+	  (setq elem (cdr elem)))
+	(setq malist (cdr malist)))
+      ;; The we score away.
+      (goto-char (point-min))
+      ;; We change the score file to the adaptive score file.
+      (gnus-score-load-file (gnus-score-file-name 
+			     gnus-newsgroup-name gnus-adaptive-file-suffix))
+      (while (re-search-forward marks nil t)
+	(beginning-of-line)
+	(setq elem (cdr (assq (gnus-summary-article-mark) alist)))
+	(if (or (not elem)
+		(get-text-property (gnus-point-at-bol) 'gnus-pseudo))
+	    ()
+	  (setq headers (gnus-get-header-by-number 
+			 (gnus-summary-article-number)))
+	  (while elem
+	    (setq match (funcall (car (car elem)) headers))
+	    (gnus-summary-score-entry 
+	     (nth 1 (car elem)) match
+	     (if (or (not gnus-score-exact-adapt-limit)
+		     (< (length match) gnus-score-exact-adapt-limit))
+		 'e 's) 
+	     (nth 2 (car elem)) date nil t)
+	    (setq elem (cdr elem))))
+	(delete-region (point) (progn (forward-line 1) (point))))
+      ;; Switch back to the old score file.
+      (gnus-score-load-file cur-score))))
+
+;;;
+;;; Score mode.
+;;;
+
+(defvar gnus-score-mode-map nil)
+(defvar gnus-score-mode-hook nil)
+
+(if gnus-score-mode-map
+    ()
+  (setq gnus-score-mode-map (copy-keymap emacs-lisp-mode-map))
+  (define-key gnus-score-mode-map "\C-c\C-c" 'gnus-score-edit-done)
+  (define-key gnus-score-mode-map "\C-c\C-d" 'gnus-score-edit-insert-date))
+
+(defun gnus-score-mode ()
+  "Mode for editing score files.
+This mode is an extended emacs-lisp mode.
+
+\\{gnus-score-mode-map}"
+  (interactive)
+  (kill-all-local-variables)
+  (use-local-map gnus-score-mode-map)
+  (set-syntax-table emacs-lisp-mode-syntax-table)
+  (setq major-mode 'gnus-score-mode)
+  (setq mode-name "Score")
+  (lisp-mode-variables nil)
+  (run-hooks 'emacs-lisp-mode-hook 'gnus-score-mode-hook))
+
+(defun gnus-score-edit-insert-date ()
+  "Insert date in numerical format."
+  (interactive)
+  (insert (int-to-string (gnus-day-number (current-time-string)))))
+
+(defun gnus-score-edit-done ()
+  "Save the score file and return to the summary buffer."
+  (interactive)
+  (let ((bufnam (buffer-file-name (current-buffer)))
+	(winconf gnus-prev-winconf))
+    (gnus-make-directory (file-name-directory (buffer-file-name)))
+    (save-buffer)
+    (kill-buffer (current-buffer))
+    (gnus-score-remove-from-cache bufnam)
+    (gnus-score-load-file bufnam)
+    (and winconf (set-window-configuration winconf))))
+
+(defun gnus-score-find-trace ()
+  "Find all score rules applied to this article."
+  (interactive)
+  (let ((gnus-newsgroup-headers
+	 (list (gnus-get-header-by-number (gnus-summary-article-number))))
+	(gnus-newsgroup-scored nil)
+	(buf (current-buffer))
+	trace)
+    (setq gnus-score-trace nil)
+    (gnus-possibly-score-headers 'trace)
+    (or (setq trace gnus-score-trace)
+	(error "No score rules apply to the current article."))
+    (pop-to-buffer "*Gnus Scores*")
+    (gnus-add-current-to-buffer-list)
+    (erase-buffer)
+    (while trace
+      (insert (format "%S\n" (cdr (car trace))))
+      (setq trace (cdr trace)))
+    (goto-char (point-min))
+    (pop-to-buffer buf)))
+  
+
+(provide 'gnus-score)
+
+;;; gnus-score.el ends here