1 ;;; morse.el --- convert text to morse code and back -*- coding: utf-8 -*-
3 ;; Copyright (C) 1995, 2002, 2005 Free Software Foundation, Inc.
5 ;; Author: Rick Farnbach <rick_farnbach@MENTORG.COM>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 ;; Boston, MA 02110-1301, USA.
27 ;; Converts text to Morse code and back with M-x morse-region and
28 ;; M-x unmorse-region (though Morse code is no longer official :-().
32 (defvar morse-code '(("a" . ".-")
85 ;; ligature character?? ("Ch" . "----")
92 ;; Recently standardized
94 "Morse code character set.")
97 (defun morse-region (beg end)
98 "Convert all text in a given region to morse code."
101 (setq end (copy-marker end)))
106 (while (< (point) end)
107 (setq str (downcase (buffer-substring (point) (1+ (point)))))
108 (cond ((looking-at "\\s-+")
109 (goto-char (match-end 0))
111 ((setq morse (assoc str morse-code))
113 (insert sep (cdr morse))
120 (defun unmorse-region (beg end)
121 "Convert morse coded text in region to ordinary ASCII text."
124 (setq end (copy-marker end)))
126 (let (str paren morse)
128 (while (< (point) end)
129 (if (null (looking-at "[-.]+"))
131 (setq str (buffer-substring (match-beginning 0) (match-end 0)))
132 (if (null (setq morse (rassoc str morse-code)))
133 (goto-char (match-end 0))
135 (if (string-equal "(" (car morse))
136 (if (setq paren (null paren)) "(" ")")
139 (delete-char 1))))))))
143 ;;; arch-tag: 3331e6c1-9a9e-453f-abfd-163a9c3f93a6
144 ;;; morse.el ends here