Function: rfc822-addresses-1

rfc822-addresses-1 is a byte-compiled function defined in rfc822.el.gz.

Signature

(rfc822-addresses-1 &optional ALLOW-GROUPS)

Source Code

;; Defined in /usr/src/emacs/lisp/mail/rfc822.el.gz
;; return either an address (a string) or a list of addresses
(defun rfc822-addresses-1 (&optional allow-groups)
  ;; Looking for an rfc822 `address'
  ;; Either a group (1*word ":" [#mailbox] ";")
  ;; or a mailbox (addr-spec | 1*word route-addr)
  ;;  addr-spec is (local-part "@" domain)
  ;;  route-addr is ("<" [1#("@" domain) ":"] addr-spec ">")
  ;;  local-part is (word *("." word))
  ;;  word is (atom | quoted-string)
  ;;  quoted-string is ("\([^\"\\n]\|\\.\|\\\n\)")
  ;;  atom is [^\000-\037\177 ()<>@,;:\".[]]+
  ;;  domain is sub-domain *("." sub-domain)
  ;;  sub-domain is domain-ref | domain-literal
  ;;  domain-literal is  "[" *(dtext | quoted-pair) "]"
  ;;  dtext is "[^][\\n"
  ;;  domain-ref is atom
  (let ((rfc822-address-start (point))
	(n 0))
    (catch 'address
      ;; optimize common cases:
      ;;  foo
      ;;  foo.bar@bar.zap
      ;; followed by "\\'\\|,\\|([^()\\]*)\\'"
      ;; other common cases are:
      ;;  foo bar <foo.bar@baz.zap>
      ;;  "foo bar" <foo.bar@baz.zap>
      ;;  those aren't hacked yet.
      (if (and (rfc822-looking-at "[^][\000-\037 ()<>@,;:\\\"]+\\(\\|@[^][\000-\037 ()<>@,;:\\\"]+\\)" t)
	       (progn (or (eobp)
			  (rfc822-looking-at ?,))))
	  (progn
	    ;; rfc822-looking-at may have inserted a space
	    (or (bobp) (/= (preceding-char) ?\ ) (delete-char -1))
	    ;; relying on the fact that rfc822-looking-at <char>
	    ;;  doesn't mung match-data
	    (throw 'address (buffer-substring rfc822-address-start (match-end 0)))))
      (goto-char rfc822-address-start)
      (while t
	(cond ((and (= n 1) (rfc822-looking-at ?@))
	       ;; local-part@domain
	       (rfc822-snarf-domain)
	       (throw 'address
		 (buffer-substring rfc822-address-start (point))))
	      ((rfc822-looking-at ?:)
	       (cond ((not allow-groups)
		      (rfc822-bad-address "A group name may not appear here"))
		     ((= n 0)
		      (rfc822-bad-address "No name for :...; group")))
	       ;; group
	       (throw 'address
		 ;; return a list of addresses
		 (rfc822-snarf-frob-list ":...; group" ?\, ?\;
					 'rfc822-addresses-1 t)))
	      ((rfc822-looking-at ?<)
	       (let ((start (point))
		     (strip t))
		 (cond ((rfc822-looking-at ?>)
			;; empty path
			())
		       ((and (not (eobp)) (= (following-char) ?\@))
			;; <@foo.bar,@baz:quux@abcd.efg>
			(rfc822-snarf-frob-list "<...> address" ?\, ?\:
                          (lambda ()
                            (if (rfc822-looking-at ?\@)
                                (rfc822-snarf-domain)
                              (rfc822-bad-address
                               "Gubbish in route-addr"))))
			(rfc822-snarf-words)
			(or (rfc822-looking-at ?@)
			    (rfc822-bad-address "Malformed <..@..> address"))
			(rfc822-snarf-domain)
			(setq strip nil))
		       ((progn (rfc822-snarf-words) (rfc822-looking-at ?@))
			; allow <foo> (losing unix seems to do this)
			(rfc822-snarf-domain)))
		 (let ((end (point)))
		   (if (rfc822-looking-at ?\>)
		       (throw 'address
			 (buffer-substring (if strip start (1- start))
					   (if strip end (1+ end))))
		     (rfc822-bad-address "Unterminated <...> address")))))
	      ((looking-at "[^][\000-\037 ()<>@,;:\\.]")
	       ;; this allows "." to be part of the words preceding
	       ;; an addr-spec, since many broken mailers output
	       ;; "Hern K. Herklemeyer III
	       ;;   <yank@megadeath.dod.gods-own-country>"
               (let ((again t))
                 (while again
                   (or (= n 0) (bobp) (= (preceding-char) ?\ )
                       (insert ?\ ))
                   (rfc822-snarf-words)
                   (setq n (1+ n))
                   (setq again (or (rfc822-looking-at ?.)
                                   (looking-at "[^][\000-\037 ()<>@,;:\\.]"))))))
	      ((= n 0)
	       (throw 'address nil))
	      ((= n 1) ; allow "foo" (losing unix seems to do this)
	       (throw 'address
		 (buffer-substring rfc822-address-start (point))))
              ((> n 1)
               (rfc822-bad-address "Missing comma between addresses or badly-formatted address"))
	      ((or (eobp) (= (following-char) ?,))
	       (rfc822-bad-address "Missing comma or route-spec"))
	      (t
	       (rfc822-bad-address "Strange character or missing comma")))))))