+;;; @ rot13-47
+;;;
+;; caesar-region written by phr@prep.ai.mit.edu Nov 86
+;; modified by tower@prep Nov 86
+;; gnus-caesar-region
+;; Modified by umerin@flab.flab.Fujitsu.JUNET for ROT47.
+(defun tm:caesar-region (&optional n)
+ "Caesar rotation of region by N, default 13, for decrypting netnews.
+ROT47 will be performed for Japanese text in any case."
+ (interactive (if current-prefix-arg ; Was there a prefix arg?
+ (list (prefix-numeric-value current-prefix-arg))
+ (list nil)))
+ (cond ((not (numberp n)) (setq n 13))
+ (t (setq n (mod n 26)))) ;canonicalize N
+ (if (not (zerop n)) ; no action needed for a rot of 0
+ (progn
+ (if (or (not (boundp 'caesar-translate-table))
+ (/= (aref caesar-translate-table ?a) (+ ?a n)))
+ (let ((i 0) (lower "abcdefghijklmnopqrstuvwxyz") upper)
+ (message "Building caesar-translate-table...")
+ (setq caesar-translate-table (make-vector 256 0))
+ (while (< i 256)
+ (aset caesar-translate-table i i)
+ (setq i (1+ i)))
+ (setq lower (concat lower lower) upper (upcase lower) i 0)
+ (while (< i 26)
+ (aset caesar-translate-table (+ ?a i) (aref lower (+ i n)))
+ (aset caesar-translate-table (+ ?A i) (aref upper (+ i n)))
+ (setq i (1+ i)))
+ ;; ROT47 for Japanese text.
+ ;; Thanks to ichikawa@flab.fujitsu.junet.
+ (setq i 161)
+ (let ((t1 (logior ?O 128))
+ (t2 (logior ?! 128))
+ (t3 (logior ?~ 128)))
+ (while (< i 256)
+ (aset caesar-translate-table i
+ (let ((v (aref caesar-translate-table i)))
+ (if (<= v t1) (if (< v t2) v (+ v 47))
+ (if (<= v t3) (- v 47) v))))
+ (setq i (1+ i))))
+ (message "Building caesar-translate-table...done")))
+ (let ((from (region-beginning))
+ (to (region-end))
+ (i 0) str len)
+ (setq str (buffer-substring from to))
+ (setq len (length str))
+ (while (< i len)
+ (aset str i (aref caesar-translate-table (aref str i)))
+ (setq i (1+ i)))
+ (goto-char from)
+ (delete-region from to)
+ (insert str)))))
+
+
+;;; @ field
+;;;
+
+(defun tm:set-fields (sym field-list &optional regexp-sym)
+ (or regexp-sym
+ (setq regexp-sym
+ (let ((name (symbol-name sym)))
+ (intern
+ (concat (if (string-match "\\(.*\\)-list" name)
+ (substring name 0 (match-end 1))
+ name)
+ "-regexp")
+ )))
+ )
+ (set sym field-list)
+ (set regexp-sym
+ (concat "^" (apply (function regexp-or) field-list) ":"))
+ )
+
+(defun tm:add-fields (sym field-list &optional regexp-sym)
+ (or regexp-sym
+ (setq regexp-sym
+ (let ((name (symbol-name sym)))
+ (intern
+ (concat (if (string-match "\\(.*\\)-list" name)
+ (substring name 0 (match-end 1))
+ name)
+ "-regexp")
+ )))
+ )
+ (let ((fields (eval sym)))
+ (mapcar (function
+ (lambda (field)
+ (or (member field fields)
+ (setq fields (cons field fields))
+ )
+ ))
+ (reverse field-list)
+ )
+ (set regexp-sym
+ (concat "^" (apply (function regexp-or) fields) ":"))
+ (set sym fields)
+ ))
+
+(defun tm:delete-fields (sym field-list &optional regexp-sym)
+ (or regexp-sym
+ (setq regexp-sym
+ (let ((name (symbol-name sym)))
+ (intern
+ (concat (if (string-match "\\(.*\\)-list" name)
+ (substring name 0 (match-end 1))
+ name)
+ "-regexp")
+ )))
+ )
+ (let ((fields (eval sym)))
+ (mapcar (function
+ (lambda (field)
+ (setq fields (delete field fields))
+ ))
+ field-list)
+ (set regexp-sym
+ (concat "^" (apply (function regexp-or) fields) ":"))
+ (set sym fields)
+ ))
+
+