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- ;; Utility functions used both by rmail and rnews
- ;; Copyright (C) 1985 Free Software Foundation, Inc.
-
- ;; 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 1, 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.
-
-
- (provide 'mail-utils)
-
- ;; should be in loaddefs
- (defvar mail-use-rfc822 nil
- "*If non-nil, use a full, hairy RFC822 parser on mail addresses.
- Otherwise, (the default) use a smaller, somewhat faster and
- often-correct parser.")
-
- (defun mail-string-delete (string start end)
- "Returns a string containing all of STRING except the part
- from START (inclusive) to END (exclusive)."
- (if (null end) (substring string 0 start)
- (concat (substring string 0 start)
- (substring string end nil))))
-
- (defun mail-strip-quoted-names (address)
- "Delete comments and quoted strings in an address list ADDRESS.
- Also delete leading/trailing whitespace and replace FOO <BAR> with just BAR.
- Return a modified address list."
- (if (null address)
- nil
- (if mail-use-rfc822
- (progn (require 'rfc822)
- (mapconcat 'identity (rfc822-addresses address) ", "))
- (let (pos)
- ;; Strip rfc822 comments (within parens).
- ;; Understand properly the effect of backslashes and string quotes.
- (let (instring (depth 0) start)
- (setq pos -1)
- (while pos
- (cond ((< pos 0))
- ((= (aref address pos) ?\\)
- (setq pos (1+ pos)))
- ((= (aref address pos) ?\")
- (setq instring (not instring)))
- (instring nil)
- ((= (aref address pos) ?\()
- (if (= depth 0) (setq start pos))
- (setq depth (1+ depth)))
- ((= (aref address pos) ?\))
- (setq depth (1- depth))
- (if (= depth 0)
- (setq address (mail-string-delete address start (1+ pos))
- pos (1- start)))))
- (setq pos (string-match "[\"\\()]" address (1+ pos)))))
-
- ;; strip surrounding whitespace
- (string-match "\\`[ \t\n]*" address)
- (setq address (substring address
- (match-end 0)
- (string-match "[ \t\n]*\\'" address
- (match-end 0))))
-
- ;; Strip whitespace before commas.
- (let (instring)
- (setq pos -1)
- (while pos
- (cond ((< pos 0))
- ((= (aref address pos) ?\\)
- (setq pos (1+ pos)))
- ((= (aref address pos) ?\")
- (setq instring (not instring)))
- (instring nil)
- ((eq (string-match "[ \t]*," address pos) pos)
- (setq address (mail-string-delete address pos
- (1- (match-end 0))))))
- (setq pos (string-match "[ \t,\"\\]" address (1+ pos)))))
-
- ;; strip `quoted' names (This is supposed to hack `"Foo Bar" <bar@host>')
- (setq pos 0)
- (while (setq pos (string-match
- "[ \t]*\"\\([^\"\\]\\|\\\\.\\|\\\\\n\\)*\"[ \t\n]*"
- address pos))
- ;; If the next thing is "@", we have "foo bar"@host. Leave it.
- (if (and (> (length address) (match-end 0))
- (= (aref address (match-end 0)) ?@))
- (setq pos (match-end 0))
- (setq address
- (mail-string-delete address
- pos (match-end 0)))))
- ;; Retain only part of address in <> delims, if there is such a thing.
- (while (setq pos (string-match "\\(,\\|\\`\\)[^,]*<\\([^>,]*>\\)"
- address))
- (let ((junk-beg (match-end 1))
- (junk-end (match-beginning 2))
- (close (match-end 0)))
- (setq address (mail-string-delete address (1- close) close))
- (setq address (mail-string-delete address junk-beg junk-end))))
- address))))
-
- (or (and (boundp 'rmail-default-dont-reply-to-names)
- (not (null rmail-default-dont-reply-to-names)))
- (setq rmail-default-dont-reply-to-names "info-"))
-
- ; rmail-dont-reply-to-names is defined in loaddefs
- (defun rmail-dont-reply-to (userids)
- "Returns string of mail addresses USERIDS sans any recipients
- that start with matches for rmail-dont-reply-to-names.
- Usenet paths ending in an element that matches are removed also."
- (if (null rmail-dont-reply-to-names)
- (setq rmail-dont-reply-to-names
- (concat (if rmail-default-dont-reply-to-names
- (concat rmail-default-dont-reply-to-names "\\|")
- "")
- (concat (regexp-quote
- (or (getenv "USER") (getenv "LOGNAME")
- (user-login-name)))
- "\\>"))))
- (let ((match (concat "\\(^\\|,\\)[ \t\n]*\\([^,\n]*!\\|\\)\\("
- rmail-dont-reply-to-names
- "\\)"))
- (case-fold-search t)
- pos epos)
- (while (setq pos (string-match match userids))
- (if (> pos 0) (setq pos (1+ pos)))
- (setq epos
- (if (string-match "[ \t\n,]+" userids (match-end 0))
- (match-end 0)
- (length userids)))
- (setq userids
- (mail-string-delete
- userids pos epos)))
- ;; get rid of any trailing commas
- (if (setq pos (string-match "[ ,\t\n]*\\'" userids))
- (setq userids (substring userids 0 pos)))
- ;; remove leading spaces. they bother me.
- (if (string-match "\\s *" userids)
- (substring userids (match-end 0))
- userids)))
-
- (defun mail-fetch-field (field-name &optional last all)
- "Return the value of the header field FIELD.
- The buffer is expected to be narrowed to just the headers of the message.
- If 2nd arg LAST is non-nil, use the last such field if there are several.
- If 3rd arg ALL is non-nil, concatenate all such fields, with commas between."
- (save-excursion
- (goto-char (point-min))
- (let ((case-fold-search t)
- (name (concat "^" (regexp-quote field-name) "[ \t]*:[ \t]*")))
- (goto-char (point-min))
- (if all
- (let ((value ""))
- (while (re-search-forward name nil t)
- (let ((opoint (point)))
- (while (progn (forward-line 1)
- (looking-at "[ \t]")))
- (setq value (concat value
- (if (string= value "") "" ", ")
- (buffer-substring opoint (1- (point)))))))
- (and (not (string= value "")) value))
- (if (re-search-forward name nil t)
- (progn
- (if last (while (re-search-forward name nil t)))
- (let ((opoint (point)))
- (while (progn (forward-line 1)
- (looking-at "[ \t]")))
- (buffer-substring opoint (1- (point))))))))))
-
- ;; Parse a list of tokens separated by commas.
- ;; It runs from point to the end of the visible part of the buffer.
- ;; Whitespace before or after tokens is ignored,
- ;; but whitespace within tokens is kept.
- (defun mail-parse-comma-list ()
- (let (accumulated
- beg)
- (skip-chars-forward " ")
- (while (not (eobp))
- (setq beg (point))
- (skip-chars-forward "^,")
- (skip-chars-backward " ")
- (setq accumulated
- (cons (buffer-substring beg (point))
- accumulated))
- (skip-chars-forward "^,")
- (skip-chars-forward ", "))
- accumulated))
-
- (defun mail-comma-list-regexp (labels)
- (let (pos)
- (setq pos (or (string-match "[^ \t]" labels) 0))
- ;; Remove leading and trailing whitespace.
- (setq labels (substring labels pos (string-match "[ \t]*$" labels pos)))
- ;; Change each comma to \|, and flush surrounding whitespace.
- (while (setq pos (string-match "[ \t]*,[ \t]*" labels))
- (setq labels
- (concat (substring labels 0 pos)
- "\\|"
- (substring labels (match-end 0))))))
- labels)
-