;;; Commentary:
-;; DRUMS is and IETF Working Group that works (or worked) on the
+;; DRUMS is an IETF Working Group that works (or worked) on the
;; successor to RFC822, "Standard For The Format Of Arpa Internet Text
;; Messages". This library is based on
;; draft-ietf-drums-msg-fmt-05.txt, released on 1998-08-05.
;;; Code:
-(require 'date)
+(require 'time-date)
+(require 'mm-util)
(defvar drums-no-ws-ctl-token "\001-\010\013\014\016-\037\177"
"US-ASCII control characters excluding CR, LF and white space.")
(defvar drums-qtext-token
(concat drums-no-ws-ctl-token "\041\043-\133\135-\177")
"Non-white-space control characaters, plus the rest of ASCII excluding backslash and doublequote.")
-
+(defvar drums-tspecials "][()<>@,;:\\\"/?="
+ "Tspecials.")
+
(defvar drums-syntax-table
(let ((table (copy-syntax-table emacs-lisp-mode-syntax-table)))
(modify-syntax-entry ?\\ "/" table)
(modify-syntax-entry ?< "(" table)
(modify-syntax-entry ?> ")" table)
+ (modify-syntax-entry ?@ "w" table)
+ (modify-syntax-entry ?/ "w" table)
+ (modify-syntax-entry ?= " " table)
+ (modify-syntax-entry ?* " " table)
+ (modify-syntax-entry ?\; " " table)
+ (modify-syntax-entry ?\' " " table)
table))
+(defun drums-token-to-list (token)
+ "Translate TOKEN into a list of characters."
+ (let ((i 0)
+ b e c out range)
+ (while (< i (length token))
+ (setq c (mm-char-int (aref token i)))
+ (incf i)
+ (cond
+ ((eq c (mm-char-int ?-))
+ (if b
+ (setq range t)
+ (push c out)))
+ (range
+ (while (<= b c)
+ (push (mm-make-char 'ascii b) out)
+ (incf b))
+ (setq range nil))
+ ((= i (length token))
+ (push (mm-make-char 'ascii c) out))
+ (t
+ (setq b c))))
+ (nreverse out)))
+
(defsubst drums-init (string)
(set-syntax-table drums-syntax-table)
(insert string)
(cond
((eq c ?\")
(forward-sexp 1))
- ((memq c '(? ?\t))
+ ((eq c ?\()
+ (forward-sexp 1))
+ ((memq c '(? ?\t ?\n))
(delete-char 1))
(t
(forward-char 1))))
(setq result
(buffer-substring
(1+ (point))
- (progn (forward-sexp 1) (1- (point)))))
- (goto-char (point-max)))
+ (progn (forward-sexp 1) (1- (point))))))
(t
(forward-char 1))))
result)))
(defun drums-parse-address (string)
"Parse STRING and return a MAILBOX / DISPLAY-NAME pair."
(with-temp-buffer
- (let (display-name mailbox c)
+ (let (display-name mailbox c display-string)
(drums-init string)
(while (not (eobp))
(setq c (following-char))
(push (buffer-substring
(1+ (point)) (progn (forward-sexp 1) (1- (point))))
display-name))
- ((looking-at (concat "[" drums-atext-token "]"))
- (push (buffer-substring (point) (progn (forward-word 1) (point)))
+ ((looking-at (concat "[" drums-atext-token "@" "]"))
+ (push (buffer-substring (point) (progn (forward-sexp 1) (point)))
display-name))
((eq c ?<)
(setq mailbox
(t (error "Unknown symbol: %c" c))))
;; If we found no display-name, then we look for comments.
(if display-name
- (setq display-name (mapconcat 'identity (nreverse display-name) " "))
- (setq display-name (drums-get-comment string)))
- (when mailbox
- (cons mailbox display-name)))))
+ (setq display-string
+ (mapconcat 'identity (reverse display-name) " "))
+ (setq display-string (drums-get-comment string)))
+ (if (not mailbox)
+ (when (string-match "@" display-string)
+ (cons
+ (mapconcat 'identity (nreverse display-name) "")
+ (drums-get-comment string)))
+ (cons mailbox display-string)))))
(defun drums-parse-addresses (string)
"Parse STRING and return a list of MAILBOX / DISPLAY-NAME pairs."
((memq c '(?\" ?< ?\())
(forward-sexp 1))
((eq c ?,)
- (push (drums-parse-address (buffer-substring beg (1- (point))))
+ (push (drums-parse-address (buffer-substring beg (point)))
pairs)
+ (forward-char 1)
(setq beg (point)))
(t
(forward-char 1))))
+ (push (drums-parse-address (buffer-substring beg (point)))
+ pairs)
(nreverse pairs))))
(defun drums-unfold-fws ()
(defun drums-parse-date (string)
"Return an Emacs time spec from STRING."
- (encode-time (parse-time-string string)))
-
+ (apply 'encode-time (parse-time-string string)))
+
+(defun drums-narrow-to-header ()
+ "Narrow to the header section in the current buffer."
+ (narrow-to-region
+ (goto-char (point-min))
+ (if (search-forward "\n\n" nil 1)
+ (1- (point))
+ (point-max)))
+ (goto-char (point-min)))
+
+(defun drums-quote-string (string)
+ "Quote string if it needs quoting to be displayed in a header."
+ (if (not (string-match (concat "[^" drums-atext-token "]") string))
+ (concat "\"" string "\"")
+ string))
+
(provide 'drums)
;;; drums.el ends here