diff shared/diary.el @ 0:107d592c5f4a

DICE versions, used by pers/common, recursive, I think/hope
author Henry S. Thompson <ht@inf.ed.ac.uk>
date Mon, 08 Feb 2021 11:44:37 +0000
parents
children 0a81352bd7d0
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/shared/diary.el	Mon Feb 08 11:44:37 2021 +0000
@@ -0,0 +1,630 @@
+;; Last edited: Wed Oct 24 17:08:20 1990
+;; provide a simple diary facility on top of rmailsum
+;; Copyright (C) 1990 Henry S. Thompson
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY.  No author or distributor
+;; accepts responsibility to anyone for the consequences of using it
+;; or for whether it serves any particular purpose or works at all,
+;; unless he says so in writing.  Refer to the GNU Emacs General Public
+;; License for full details.
+
+;; Everyone is granted permission to copy, modify and redistribute
+;; GNU Emacs, but only under the conditions described in the
+;; GNU Emacs General Public License.   A copy of this license is
+;; supposed to have been given to you along with GNU Emacs so you
+;; can know your rights and responsibilities.  It should be in a
+;; file named COPYING.  Among other things, the copyright notice
+;; and this notice must be preserved on all copies.
+
+(provide 'diary)
+(require 'mail-extras)
+
+(autoload 'sort-subr "sort")
+
+(defvar ht-diary-file-name "~/DIARY.babyl"
+  "default name of diary file")
+
+(defvar ht-Calendar-directory "~/Calendar")
+
+(defun xxx-date-lessp (date1 date2)
+  "Return T if DATE1 is earlyer than DATE2."
+  (string-lessp (gnus-comparable-date date1)
+		(gnus-comparable-date date2)))
+
+(defun xxx-comparable-date (date)
+  "Make comparable string by string-lessp from DATE."
+  (let ((month '(("JAN" . " 1")("FEB" . " 2")("MAR" . " 3")
+		 ("APR" . " 4")("MAY" . " 5")("JUN" . " 6")
+		 ("JUL" . " 7")("AUG" . " 8")("SEP" . " 9")
+		 ("OCT" . "10")("NOV" . "11")("DEC" . "12")))
+	(date (or date "")))
+    ;; Can understand the following styles:
+    ;; (1) 14 Apr 89 03:20:12 GMT
+    ;; (2) Fri, 17 March 89 4:01:33 GMT
+    (if (string-match
+	 "\\([0-9]+\\) \\([^ ,]+\\) \\([0-9]+\\) *\\([0-9:]*\\)" date)
+	(let ((year (substring date (match-beginning 3) (match-end 3)))
+	      (mn (substring date
+			      (match-beginning 2)
+			      (+ 3 (match-beginning 2))))
+	      (day (substring date
+				   (match-beginning 1) (match-end 1)))
+	      (time (substring date (match-beginning 4) (match-end 4))))
+	(concat
+	 ;; Year
+	 (if (= (length year) 2)
+	     (if (string-match "^9" year)
+		 (concat "19" year)
+	       (concat "20" year))
+	   year)
+	 ;; Month
+	 (cdr
+	  (assoc
+	   (upcase mn)
+	   month))
+	 ;; Day
+	 (format "%2d" (string-to-int day))
+	 ;; Time
+	 time))
+      ;; Cannot understand DATE string.
+      date
+      )
+    ))
+
+(defun update-default-diary (arg) "update a diary - with arg, the one for
+this file.  Without arg, the default (named in ht-diary-file-name)"
+  (interactive "P")
+  (if arg
+      (update-diary (current-buffer))
+    (require-diary)
+    (update-diary (get-file-buffer ht-diary-file-name))))
+
+(defun update-diary (buffer)
+;; (setq rmail-summary-buffer (get-buffer-create "*Diary*"))
+  (let ((obuf (current-buffer)))
+    (set-buffer buffer)
+    (if (not has-diary-summary)
+	(progn (make-local-variable 'has-diary-summary)
+	       (setq has-diary-summary t)))
+    (rmail-summary)
+    (set-buffer obuf)))
+
+(defun do-diary-update () "rmail-summary-mode-hook calls this"
+  (if (save-excursion (set-buffer rbuf)
+		      has-diary-summary)
+      (progn
+	(make-local-variable 'diary-summary-buffer)
+	(setq diary-summary-buffer t)
+	(setq description (concat "Diary " description))
+	(setq buffer-read-only nil)
+	(sort-diary-hdrs)
+	(format-diary-hdrs)
+	(setq buffer-read-only t)
+	(not-modified)
+	(beginning-of-buffer)
+	(setq mesg nil)			; to go to earliest, not first in file
+	)))
+
+(defun require-diary ()
+  (if (not (get-file-buffer ht-diary-file-name))
+      (progn (rmail-input ht-diary-file-name)
+	     (rmail-show-message 1))
+    ))
+
+(defvar diary-summary-buffer nil "flag to identify diary summaries")
+(defvar has-diary-summary nil "flag to identify buffers with diary summaries")
+
+(defun sort-diary-hdrs ()
+  (interactive)
+  (goto-char (point-min))
+  (sort-subr nil 'forward-line 'end-of-line 'get-diary-hdr-date nil))
+
+(defun format-diary-hdrs ()
+  (goto-char (point-min))
+  (while (< (point)(point-max))
+    (forward-char 5)
+    (delete-char 35)
+    (looking-at " *\\([0-9]*\\) *\\([a-zA-Z]*\\) *\\([0-9]*\\) *\\([0-9]*\\)")
+    (if (match-beginning 0)
+	(let ((day (buffer-substring (match-beginning 1)(match-end 1)))
+	      (month (capitalize (buffer-substring (match-beginning 2)
+						   (min (+ (match-beginning 2)
+							   3)
+							(match-end 2)))))
+	      (year (buffer-substring (max
+				       (- (match-end 3) 2)
+				       (match-beginning 3))
+				      (match-end 3)))
+	      (time (buffer-substring (match-beginning 4)(match-end 4))))
+	  (delete-char (+ 1
+			  (if (= (match-end 4)
+				 (match-beginning 4))
+			      0		; fix for no time case
+			    1)
+			  (- (match-end 4)(match-beginning 1))))
+	  (insert (format "  %2s %3s %2s  %4s " day month year time))))
+    (forward-line 1))
+  (goto-char (point-min)))    
+
+(defun get-diary-hdr-date ()
+  (looking-at " *[^ ]* *[^ ]* *[^ ]* *\\(.*\\)$")
+  (xxx-comparable-date (buffer-substring (match-beginning 1)(match-end 1))))
+
+
+(if (not (boundp 'rmail-edit-map))
+    (load-library "rmailedit"))
+(if (not (boundp 'rmail-summary-mode-map))
+    (progn (load-library "rmailsum")
+	   (rmail-summary-mode-fun1)))
+(define-key rmail-edit-map "\C-c\C-c" 'ht-rmail-cease-edit)
+(define-key rmail-edit-map "\C-c\C-]" 'ht-rmail-abort-edit)
+;(defvar diary-mode-map (copy-keymap rmail-summary-mode-map))
+;(define-key diary-mode-map "s" 'diary-save)
+(define-key rmail-mode-map "h" 'ht-rmail-summarise)
+(setq rmail-summary-mode-hook 'do-diary-update)
+
+(defvar editing-diary-entry nil)
+
+(defun diary-save ()
+  "save parent file and update"
+  (interactive)
+  (set-buffer rmail-buffer)
+  (rmail-expunge-and-save)
+  (if has-diary-summary (update-diary (current-buffer))))
+
+(defun ht-rmail-summarise ()
+  "Display a summary of all messages, one line per message.
+If file is named as ht-diary-file-name, or the summary buffer is already
+a diary summary, make it a Diary summary (see
+\\[describe-mode] rmail-summary-mode for info)."
+  (interactive)
+  (if (eq (current-buffer)
+	  (get-file-buffer ht-diary-file-name))       
+      (update-default-diary t)
+    (rmail-summary)))
+
+(defun edit-and-move-to-diary ()
+  "try to add a date to subject field, move to diary on exit"
+  (interactive)
+  (make-local-variable 'editing-diary-entry)
+  (setq editing-diary-entry t)
+  (rmail-edit-current-message)
+  (goto-char (point-min))
+  (search-forward "\n\n")
+  (let ((try-date (and
+		   (re-search-forward
+		   "[0-9][-0-9 ]*[- ][a-zA-Z][a-zA-Z]*[- 0-9]*" nil t)
+		   (buffer-substring (match-beginning 0)(match-end 0))))
+	sublp)
+    (goto-char (point-min))
+    (setq sublp (search-forward "Subject: " nil t))
+    (if try-date
+	(progn (set-mark (point))
+	       (insert try-date)))))
+
+(defun gnus-edit-and-move-to-diary (&optional no-delete)
+  "try to add a date to subject field, move to diary on exit"
+  (interactive "P")
+    (when (gnus-group-read-only-p)
+      (error "The current newsgroup does not support article editing"))
+    ;; Select article if needed.
+    (unless (eq (gnus-summary-article-number)
+		gnus-current-article)
+      (gnus-summary-select-article t))
+    (gnus-article-date-original)
+    (message "About to forward. . .")
+    (gnus-summary-mail-forward 1)
+    (message "Begin forward. . .")
+    (goto-char (point-min))
+    (search-forward "^To: " nil t)
+    (forward-char 4)
+    (insert "htcalendar@markup.co.uk")
+    (search-forward "------ Start of forwarded")
+    (let (sublp)
+      (save-excursion
+	(let ((try-date
+	       (and
+		(or (re-search-forward "^\r?$" nil 1) t)
+		(re-search-forward
+		 "[0-9][-0-9 ]*[- ][jfmasondJFMASOND][a-zA-Z]*[- 0-9]*"
+		 (save-excursion (search-forward "\n--\n" nil t))
+		 t)
+		(buffer-substring (match-beginning 0)(match-end 0)))))
+	  (goto-char (point-min))
+	  (setq sublp (search-forward "Subject: " nil t))
+	  (delete-region (point)(progn (search-forward "] " nil t)))
+	  (message (format "date: |%s| %s" try-date sublp))
+	  (if (and sublp
+		   try-date)
+	      (progn (set-mark (point))
+		     (insert try-date)))))
+      (make-local-hook 'message-send-hook)
+      (if (and no-delete (equal (car no-delete) 16))
+	  (let ((hook '(lambda ()
+			 (ht-gnus-cease-edit nil)
+			 nil t)))
+	    (add-hook 'message-send-hook hook nil t)
+	    
+	    (message-send-and-exit)
+	    (if (not (gnus-summary-next-unread-article))
+		(gnus-summary-exit)))
+	(add-hook 'message-send-hook
+		  `(lambda ()
+		     (ht-gnus-cease-edit ',no-delete)
+					; (gnus-summary-edit-article-done
+					; ,(or (mail-header-references gnus-current-headers) "")
+					; ,(gnus-group-read-only-p) ,gnus-summary-buffer nil)
+					; (switch-to-buffer gnus-summary-buffer)))
+					; (goto-char (point-min))
+					; (search-forward "\nSubject: " nil t))
+		     )
+		  nil t)
+	(split-window-vertically 6)
+	(other-window 1)
+	(search-forward "\n\n" nil t)
+	(other-window 1)
+	(goto-char sublp)
+	(message "Exiting to buffer, we hope")))
+  )
+
+(defun ht-gnus-cease-edit (&optional no-delete)
+  "check if diary edit, move if so"
+  (interactive "P")
+  (message "ceasing. . .")
+  (ht-forward-to-Calendar)
+  (let ((rmail-summary-redo '(rmail-summary)))
+    (gnus-output-to-rmail ht-diary-file-name)
+    )
+  (unless no-delete
+    (with-current-buffer gnus-summary-buffer
+      (gnus-summary-delete-article)))
+  (if (get-buffer "diary.babyl-summary")
+      (kill-buffer "diary.babyl-summary"))
+  (with-current-buffer "diary.babyl"
+    (rmail-mode)
+    (save-buffer)
+    (ht-rmail-summarise))
+  (message "ceased"))
+
+(defun ht-gnus-summary-save-in-diary (&optional filename)
+  (gnus-eval-in-buffer-window gnus-save-article-buffer
+    (save-excursion
+      (save-restriction
+	(widen)
+	(gnus-output-to-rmail ht-diary-file-name)))))
+
+;; private copy to simulate hook
+(defun ht-rmail-cease-edit ()
+  "check if diary edit, move if so"
+  (interactive)
+  (rmail-cease-edit)
+  (if editing-diary-entry
+      (progn (setq editing-diary-entry nil)
+	     (ht-forward-to-Calendar)
+	     (rmail-output-to-rmail-file ht-diary-file-name 1)
+	     (ht-rmail-delete-forward))))
+
+;; try to add a diary subject field line to the appropriate calendar file
+(defun ht-forward-to-Calendar ()
+  (goto-char (point-min))
+  (search-forward "Subject: ")
+  (or (looking-at
+       "\\([0-9]+\\) \\([A-Za-z]+\\) \\([0-9]+\\) \\([0-9:]*\\) ?\\(.*\\)\n")
+      (error "not a recognisable diary line"))
+  (let ((day (buffer-substring (match-beginning 1) (match-end 1)))
+	(month (buffer-substring (match-beginning 2) (match-end 2)))
+	(year (buffer-substring (match-beginning 3) (match-end 3)))
+	(time (buffer-substring (match-beginning 4) (match-end 4)))
+	(message (buffer-substring (match-beginning 5) (match-end 5)))
+	(mb (match-beginning 4))
+	(me (match-end 5))
+	ends e-day e-month fn)
+    (let ((year (if (string-match "^\\(19\\|20\\).." year)
+		    year
+		  (if (eq (length year) 2)
+		      (concat "20" year)
+		    (progn (if (and (equal time "")(eq (length year) 4))
+			       (setq time year))
+			   (format-time-string "%Y")))))
+	  (t-month (capitalize
+		    (substring month 0 3))))
+      (let* ((n-day (read day))
+	     (mon-table '((Jan . 1)
+			      (Feb . 2)
+			      (Mar . 3)
+			      (Apr . 4)
+			      (May . 5)
+			      (Jun . 6)
+			      (Jul . 7)
+			      (Aug . 8)
+			      (Sep . 9)
+			      (Oct . 10)
+			      (Nov . 11)
+			      (Dec . 12)))
+	     (a-month (assq (read t-month)
+			    mon-table))
+	     (n-month (if a-month (cdr a-month) 0))
+	     (u-time (if (equal time "") "0" time))
+	     (hour (/ (read u-time) 100))
+	     (minute (mod (read u-time) 100))
+	     (nhour (if (> minute 29)
+			(+ 1 hour)
+		      hour))
+	     (nminute (if (> minute 29)
+			  (- minute 30)
+			(+ minute 30)))
+	     (n-year (read year))
+	     (r-subj  (mail-fetch-field "Subject"))
+	     (body (save-excursion
+		     (buffer-substring
+		      (progn
+			(goto-char (point-min))
+			(if (re-search-forward "^\r?$" nil 1)
+			    (match-beginning 0)
+			  (point-max)))
+		      (point-max))))
+	     (subj-matches (string-match "^\\([^(]*\\)\\((\\(.*\\))\\)?"
+					 message))
+	     (np-subj (match-string 1 message))
+	     (p-subj (or (match-string 3 message) ""))
+	     (uid (or (mail-fetch-field "Message-id")
+		      (let ((ct (current-time)))
+			(format "%d-%d-%d"
+				(car ct)
+				(cadr ct)
+				(caddr ct)))))
+	     )
+	(if (string-match " -- \\(.*\\)$" message)
+	    (progn
+	      (setq ends (substring message (match-beginning 1)
+				    (match-end 1)))
+	      (setq message (substring message 0 (match-beginning 0)))
+	      (if (string-match "\\([0-9]+\\) \\([A-Za-z]+\\)" ends)
+		  (progn
+		    (setq e-day (substring ends (match-beginning 1)
+					   (match-end 1)))
+		    (setq e-month (assq
+				   (read (capitalize
+					  (substring
+					   (substring ends (match-beginning 2)
+						      (match-end 2))
+					   0 3)))
+				   mon-table))))))
+	(setq fn (build-vcal-message (my-time-iso8601
+				      (encode-time
+				       0 minute
+				       hour
+				       n-day
+				       n-month
+				       n-year))
+				     (my-time-iso8601
+				      (if e-day				  
+					  (encode-time
+					   0 (if (eq hour 0) 30 minute) ;nminute
+					   (if (eq hour 0) 23 hour) ; nhour
+					   (read e-day)
+					   (if e-month (cdr e-month) 0)
+					   n-year)
+					(encode-time
+					 0 minute ; nminute
+					 (+ hour 1) ; nhour
+					 n-day
+					 n-month
+					 n-year)))
+	     "ORGANIZER;CN=\"Henry S. Thompson\":mailto:htcalendar@markup.co.uk"
+				     ;(concat "ORGANIZER:" (mail-fetch-field "From"))
+				     p-subj
+				     body
+				     np-subj
+				     (concat "ht-vcal-" uid)))
+	(if fn
+	    (progn
+	      (goto-char (point-min))
+	      (if (search-forward "<#multipart " nil t)
+		  (progn
+		    (if (search-forward "<#multipart type=alternative" nil t)
+			(beginning-of-line)
+		      (forward-line 2)
+		      ;; now at beginning of forwarded text
+		      (if (search-forward "<#part " nil t)
+			  (progn
+			    ;; now at beginning of _attachments_
+			    (beginning-of-line))
+			;; no attachments, probably never happens
+			(search-forward "<#/multipart>"))))
+		;; plain text, make it multipart
+		(search-forward "-------- Start of forwarded")
+		(re-search-forward "^\r?$")
+		(forward-line 1)
+		(insert "<#multipart type=mixed>\n<#part type=text/plain charset=\"ISO-8859-1\" format=\"flowed\" disposition=inline nofile=yes>\n")
+		(search-forward "--------- End of forwarded")
+		(forward-line -1)
+		(insert "<#/multipart>\n")
+		(forward-line -1))
+	      (mml-attach-file fn "application/octet-stream" "diary event")
+;	      (let ((res (shell-command-to-string
+;			  (concat "updateCal.pl < " fn))))
+;		(if (not (equal res ""))
+;		    (message (format "update losing: %s" res))))
+	      )))
+      (if (file-exists-p ht-Calendar-directory)
+	  (let* ((dfn (concat ht-Calendar-directory
+			      "/xy"
+			      year
+			      "/xc"
+			      day
+			      t-month
+			      year))
+		 (buf (find-file-noselect dfn))
+		 )
+	    (save-excursion
+	      (set-buffer buf)
+	      (goto-char (point-max))
+	      (if (not (bolp))
+		  (insert "\n"))
+	      (if time
+		  (insert time " "))
+	      (insert message)
+	      (let ((require-final-newline nil))
+		(save-buffer)))
+	    (if ends
+		;; an end date also given
+		(if e-day
+		    (let (t-e-month msg)
+		      (setq msg (concat
+				 (substring message 0
+					    (string-match " " message))
+				 " continues"))
+		      (if (string-equal (setq t-e-month
+					      (if e-month (car e-month)
+						t-month))
+					t-month)
+			  (fill-dates year t-month (1+ (car
+							(read-from-string day)))
+				      (car
+				       (read-from-string e-day))
+				      msg)
+			(fill-dates year t-month (1+ (car
+						      (read-from-string day)))
+				    (cdr (assoc t-month
+						'(("Jan" . 31)
+						  ("Feb" . 28)
+						  ("Mar" . 31)
+						  ("Apr" . 30)
+						  ("May" . 31)
+						  ("Jun" . 30)
+						  ("Jul" . 31)
+						  ("Aug" . 31)
+						  ("Sep" . 30)
+						  ("Oct" . 31)
+						  ("Nov" . 30)
+						  ("Dec" . 31))))
+				    msg)
+			(fill-dates year t-e-month 1
+				    (car (read-from-string e-day))
+				    msg)))
+		  (message "\C-g\C-gCouldn't parse end date: %s" ends)))
+	    )))))
+
+(defun fill-dates (year month start end mesg)
+  "fill the dates between start and end with message in the calendar"
+  (let ((day start))
+    (while (<= day end)
+      (let* ((dfn (concat ht-Calendar-directory
+			  "/xy"
+			  year
+			  "/xc"
+			  (format "%d" day)
+			  (format "%s" month)
+			  year))
+	     (buf (find-file-noselect dfn)))
+	  (save-excursion
+	    (set-buffer buf)
+	    (goto-char (point-max))
+	    (if (not (bolp))
+		(insert "\n"))
+	    (insert mesg)
+	    (let ((require-final-newline nil))
+	      (save-buffer))))
+      (setq day (1+ day)))))
+
+;; private copy
+(defun ht-rmail-abort-edit ()
+  "add a hook"
+  (interactive)
+  (setq editing-diary-entry nil)
+  (rmail-abort-edit))
+
+(defun rmail-edit-current-message ()
+  "Edit the contents of this message."
+  (interactive)
+  (rmail-edit-mode)
+  (make-local-variable 'rmail-old-text)
+  (setq rmail-old-text (buffer-substring (point-min) (point-max)))
+  (setq buffer-read-only nil)
+  (set-buffer-modified-p (buffer-modified-p))
+  ;; Make mode line update.
+  (if (and (eq (key-binding "\C-c\C-c") 'ht-rmail-cease-edit)
+	   (eq (key-binding "\C-c\C-]") 'ht-rmail-abort-edit))
+      (if editing-diary-entry
+	  (message "Editing: Type C-c C-c to move to diary and return to Rmail, C-c C-] to abort")
+	(message "Editing: Type C-c C-c to return to Rmail, C-c C-] to abort"))
+    (message (substitute-command-keys
+	      "Editing: Type \\[rmail-cease-edit] to return to Rmail, \\[rmail-abort-edit] to abort"))))
+
+
+(defun build-vcal-message (start end org location description summary uid)
+  (save-excursion
+    (let ((fn (concat "/tmp/" (make-temp-name "vcal") ".vcs")))
+      (find-file fn)
+      (insert "BEGIN:VCALENDAR\nMETHOD:PUBLISH\nPRODID:-//Henry S. Thompson//gnus diary hack//EN\nVERSION:0.1\nBEGIN:VEVENT\n")
+      (insert "UID\n :")(insert uid)(insert "\n")
+      (insert "SUMMARY")(insert-encoded-maybe summary)(insert "\n")
+      (insert "DESCRIPTION")(insert-folded description)(insert "\r\n")
+      (insert "LOCATION")(insert-encoded-maybe location)(insert "\n")
+      (insert "DTSTART\n :")(insert start)(insert "Z\n")
+      (insert "DTEND\n :")(insert end)(insert "Z\n")
+      (insert "DTSTAMP\n :")(insert
+			  (my-time-iso8601 (current-time)))
+      (insert "Z\n")
+      ;(insert "ORGANIZER")(insert-encoded-maybe org)
+      (insert org)
+      (insert "\n")
+      (insert "BEGIN:VALARM\nTRIGGER:-PT15M\nACTION:DISPLAY\nDESCRIPTION:Reminder\nEND:VALARM\n")
+      (insert "BEGIN:VALARM\nTRIGGER:-PT15M\nACTION:AUDIO\nDESCRIPTION:Reminder\nEND:VALARM\n")
+      (insert "END:VEVENT\nEND:VCALENDAR\n")
+      (save-buffer)
+      fn)))
+
+(defun insert-encoded-maybe (string)
+  (if (string-match "[\000-\007\n\013\015-\037\200-\377=]" string)
+      (progn
+	(insert ";ENCODING=QUOTED-PRINTABLE:")
+	(let ((beg (point)))
+	  (insert string)
+	  (message (format "%d;%d" beg (point)))
+	  (quoted-printable-encode-region
+	   beg
+	   (point)
+	   t
+	   "^\000-\007\n\013\015-\037\200-\377="))
+	(goto-char (point-max)))
+	(insert "\n :")
+	(insert string)))
+
+(defun insert-folded (string)
+  (insert "\n :")
+  (let ((beg (point)))
+    (insert string)
+    (narrow-to-region beg (point))
+    (goto-char (point-min))
+    (replace-string "\n" "\\n")
+    (goto-char (point-min))
+    (replace-string "\r" "")
+    (goto-char (point-min))
+    (replace-string "," "\\,")
+    (goto-char (point-min))
+    (while (> (- (point-max) (point)) 72)
+      (forward-char 70)
+      (insert "\n "))
+    (goto-char (point-max))
+    (insert "\r\n")
+    (widen)))
+
+(defun my-time-iso8601 (time)
+  (let ((tzo (car (current-time-zone time)))
+	(hi (car time))
+	(lo (cadr time))
+	(ignore (cddr time)))
+    (gnus-time-iso8601
+     (if (>= lo tzo)
+	 (cons hi
+	       (cons (- lo tzo)
+		     ignore))
+       (cons (- hi 1)
+	     (cons (- (+ lo 65536) tzo)
+		   ignore)))
+       )))