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4203c128 | 1 | ;;; morse.el --- convert text to morse code and back -*- coding: utf-8 -*- |
a4ff849c | 2 | |
73b0cd50 | 3 | ;; Copyright (C) 1995, 2001-2011 Free Software Foundation, Inc. |
a4ff849c RS |
4 | |
5 | ;; Author: Rick Farnbach <rick_farnbach@MENTORG.COM> | |
0c0e321f | 6 | ;; Keywords: games |
a4ff849c RS |
7 | |
8 | ;; This file is part of GNU Emacs. | |
9 | ||
b1fc2b50 | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
a4ff849c | 11 | ;; it under the terms of the GNU General Public License as published by |
b1fc2b50 GM |
12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
a4ff849c RS |
14 | |
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. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
b1fc2b50 | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
a4ff849c | 22 | |
0c0e321f DL |
23 | ;;; Commentary: |
24 | ||
507c5deb | 25 | ;; Converts text to Morse code and back with M-x morse-region and |
0c0e321f DL |
26 | ;; M-x unmorse-region (though Morse code is no longer official :-(). |
27 | ||
a4ff849c RS |
28 | ;;; Code: |
29 | ||
30 | (defvar morse-code '(("a" . ".-") | |
31 | ("b" . "-...") | |
32 | ("c" . "-.-.") | |
33 | ("d" . "-..") | |
34 | ("e" . ".") | |
35 | ("f" . "..-.") | |
36 | ("g" . "--.") | |
37 | ("h" . "....") | |
38 | ("i" . "..") | |
39 | ("j" . ".---") | |
40 | ("k" . "-.-") | |
41 | ("l" . ".-..") | |
42 | ("m" . "--") | |
43 | ("n" . "-.") | |
44 | ("o" . "---") | |
45 | ("p" . ".--.") | |
46 | ("q" . "--.-") | |
47 | ("r" . ".-.") | |
48 | ("s" . "...") | |
49 | ("t" . "-") | |
50 | ("u" . "..-") | |
51 | ("v" . "...-") | |
52 | ("w" . ".--") | |
53 | ("x" . "-..-") | |
54 | ("y" . "-.--") | |
55 | ("z" . "--..") | |
56 | ;; Punctuation | |
57 | ("=" . "-...-") | |
58 | ("?" . "..--..") | |
59 | ("/" . "-..-.") | |
60 | ("," . "--..--") | |
61 | ("." . ".-.-.-") | |
62 | (":" . "---...") | |
63 | ("'" . ".----.") | |
64 | ("-" . "-....-") | |
65 | ("(" . "-.--.-") | |
66 | (")" . "-.--.-") | |
67 | ;; Numbers | |
68 | ("0" . "-----") | |
69 | ("1" . ".----") | |
70 | ("2" . "..---") | |
71 | ("3" . "...--") | |
72 | ("4" . "....-") | |
73 | ("5" . ".....") | |
74 | ("6" . "-....") | |
75 | ("7" . "--...") | |
76 | ("8" . "---..") | |
4203c128 SJ |
77 | ("9" . "----.") |
78 | ;; Non-ASCII | |
79 | ("Ä" . ".-.-") | |
34c4c919 | 80 | ("Æ" . ".-.-") |
4203c128 SJ |
81 | ("Á" . ".--.-") |
82 | ("Å" . ".--.-") | |
83 | ;; ligature character?? ("Ch" . "----") | |
84 | ("ß" . ".../...") | |
85 | ("É" . "..-..") | |
86 | ("Ñ" . "--.--") | |
87 | ("Ö" . "---.") | |
34c4c919 | 88 | ("Ø" . "---.") |
507c5deb SJ |
89 | ("Ü" . "..--") |
90 | ;; Recently standardized | |
91 | ("@" . ".--.-.")) | |
a4ff849c RS |
92 | "Morse code character set.") |
93 | ||
0c0e321f | 94 | ;;;###autoload |
a4ff849c RS |
95 | (defun morse-region (beg end) |
96 | "Convert all text in a given region to morse code." | |
97 | (interactive "r") | |
98 | (if (integerp end) | |
99 | (setq end (copy-marker end))) | |
100 | (save-excursion | |
101 | (let ((sep "") | |
102 | str morse) | |
103 | (goto-char beg) | |
104 | (while (< (point) end) | |
105 | (setq str (downcase (buffer-substring (point) (1+ (point))))) | |
106 | (cond ((looking-at "\\s-+") | |
107 | (goto-char (match-end 0)) | |
108 | (setq sep "")) | |
109 | ((setq morse (assoc str morse-code)) | |
110 | (delete-char 1) | |
111 | (insert sep (cdr morse)) | |
112 | (setq sep "/")) | |
113 | (t | |
114 | (forward-char 1) | |
115 | (setq sep ""))))))) | |
116 | ||
0c0e321f | 117 | ;;;###autoload |
a4ff849c RS |
118 | (defun unmorse-region (beg end) |
119 | "Convert morse coded text in region to ordinary ASCII text." | |
120 | (interactive "r") | |
121 | (if (integerp end) | |
122 | (setq end (copy-marker end))) | |
123 | (save-excursion | |
124 | (let (str paren morse) | |
125 | (goto-char beg) | |
126 | (while (< (point) end) | |
127 | (if (null (looking-at "[-.]+")) | |
128 | (forward-char 1) | |
129 | (setq str (buffer-substring (match-beginning 0) (match-end 0))) | |
130 | (if (null (setq morse (rassoc str morse-code))) | |
131 | (goto-char (match-end 0)) | |
132 | (replace-match | |
133 | (if (string-equal "(" (car morse)) | |
134 | (if (setq paren (null paren)) "(" ")") | |
135 | (car morse)) t) | |
136 | (if (looking-at "/") | |
137 | (delete-char 1)))))))) | |
138 | ||
139 | (provide 'morse) | |
140 | ||
141 | ;;; morse.el ends here |