lisp/play/morse.el

   1 ;;; morse.el --- convert text to morse code and back             -*- coding: utf-8 -*-
   2
   3 ;; Copyright (C) 1995, 2001-2013 Free Software Foundation, Inc.
   4
   5 ;; Author: Rick Farnbach <rick_farnbach@MENTORG.COM>
   6 ;; Keywords: games
   7
   8 ;; This file is part of GNU Emacs.
   9
  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 3 of the License, or
  13 ;; (at your option) any later version.
  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
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;; Converts text to Morse code and back with M-x morse-region and
  26 ;; M-x unmorse-region (though Morse code is no longer official :-().
  27
  28 ;; Converts text to NATO phonetic alphabet and back with M-x
  29 ;; nato-region and M-x denato-region.
  30
  31 ;;; Code:
  32
  33 (defvar morse-code '(("a" . ".-")
  34                      ("b" . "-...")
  35                      ("c" . "-.-.")
  36                      ("d" . "-..")
  37                      ("e" . ".")
  38                      ("f" . "..-.")
  39                      ("g" . "--.")
  40                      ("h" . "....")
  41                      ("i" . "..")
  42                      ("j" . ".---")
  43                      ("k" . "-.-")
  44                      ("l" . ".-..")
  45                      ("m" . "--")
  46                      ("n" . "-.")
  47                      ("o" . "---")
  48                      ("p" . ".--.")
  49                      ("q" . "--.-")
  50                      ("r" . ".-.")
  51                      ("s" . "...")
  52                      ("t" . "-")
  53                      ("u" . "..-")
  54                      ("v" . "...-")
  55                      ("w" . ".--")
  56                      ("x" . "-..-")
  57                      ("y" . "-.--")
  58                      ("z" . "--..")
  59                      ;; Punctuation
  60                      ("=" . "-...-")
  61                      ("?" . "..--..")
  62                      ("/" . "-..-.")
  63                      ("," . "--..--")
  64                      ("." . ".-.-.-")
  65                      (":" . "---...")
  66                      ("'" . ".----.")
  67                      ("-" . "-....-")
  68                      ("(" . "-.--.-")
  69                      (")" . "-.--.-")
  70                      ;; Numbers
  71                      ("0" . "-----")
  72                      ("1" . ".----")
  73                      ("2" . "..---")
  74                      ("3" . "...--")
  75                      ("4" . "....-")
  76                      ("5" . ".....")
  77                      ("6" . "-....")
  78                      ("7" . "--...")
  79                      ("8" . "---..")
  80                      ("9" . "----.")
  81                      ;; Non-ASCII
  82                      ("Ä" . ".-.-")
  83                      ("Æ" . ".-.-")
  84                      ("Á" . ".--.-")
  85                      ("Å" . ".--.-")
  86                      ;; ligature character?? ("Ch" . "----")
  87                      ("ß" . ".../...")
  88                      ("É" . "..-..")
  89                      ("Ñ" . "--.--")
  90                      ("Ö" . "---.")
  91                      ("Ø" . "---.")
  92                      ("Ü" . "..--")
  93                      ;; Recently standardized
  94                      ("@" . ".--.-."))
  95   "Morse code character set.")
  96
  97 (defvar nato-alphabet '(("a" . "Alfa")
  98                         ("b" . "Bravo")
  99                         ("c" . "Charlie")
 100                         ("d" . "Delta")
 101                         ("e" . "Echo")
 102                         ("f" . "Foxtrot")
 103                         ("g" . "Golf")
 104                         ("h" . "Hotel")
 105                         ("i" . "India")
 106                         ("j" . "Juliett")
 107                         ("k" . "Kilo")
 108                         ("l" . "Lima")
 109                         ("m" . "Mike")
 110                         ("n" . "November")
 111                         ("o" . "Oscar")
 112                         ("p" . "Papa")
 113                         ("q" . "Quebec")
 114                         ("r" . "Romeo")
 115                         ("s" . "Sierra")
 116                         ("t" . "Tango")
 117                         ("u" . "Uniform")
 118                         ("v" . "Victor")
 119                         ("w" . "Whiskey")
 120                         ("x" . "Xray")
 121                         ("y" . "Yankee")
 122                         ("z" . "Zulu")
 123                         ;; Numbers
 124                         ("0" . "Zero")
 125                         ("1" . "One")
 126                         ("2" . "Two")
 127                         ("3" . "Three")
 128                         ("4" . "Four")
 129                         ("5" . "Five")
 130                         ("6" . "Six")
 131                         ("7" . "Seven")
 132                         ("8" . "Eight")
 133                         ("9" . "Niner")
 134                         ;; Punctuation is not part of standard
 135                         ("=" . "Equals")
 136                         ("?" . "Query")
 137                         ("/" . "Slash")
 138                         ("," . "Comma")
 139                         ("." . "Stop")
 140                         (":" . "Colon")
 141                         ("'" . "Apostrophe")
 142                         ("-" . "Dash")
 143                         ("(" . "Open")
 144                         (")" . "Close")
 145                         ("@" . "At"))
 146   "NATO phonetic alphabet.
 147 See ''International Code of Signals'' (INTERCO), United States
 148 Edition, 1969 Edition (Revised 2003) available from National
 149 Geospatial-Intelligence Agency at http://www.nga.mil/")
 150
 151 ;;;###autoload
 152 (defun morse-region (beg end)
 153   "Convert all text in a given region to morse code."
 154   (interactive "*r")
 155   (if (integerp end)
 156       (setq end (copy-marker end)))
 157   (save-excursion
 158     (let ((sep "")
 159           str morse)
 160       (goto-char beg)
 161       (while (< (point) end)
 162         (setq str (downcase (buffer-substring (point) (1+ (point)))))
 163         (cond ((looking-at "\\s-+")
 164                (goto-char (match-end 0))
 165                (setq sep ""))
 166               ((setq morse (assoc str morse-code))
 167                (delete-char 1)
 168                (insert sep (cdr morse))
 169                (setq sep "/"))
 170               (t
 171                (forward-char 1)
 172                (setq sep "")))))))
 173
 174 ;;;###autoload
 175 (defun unmorse-region (beg end)
 176   "Convert morse coded text in region to ordinary ASCII text."
 177   (interactive "*r")
 178   (if (integerp end)
 179       (setq end (copy-marker end)))
 180   (save-excursion
 181     (let (str paren morse)
 182       (goto-char beg)
 183       (while (< (point) end)
 184         (if (null (looking-at "[-.]+"))
 185             (forward-char 1)
 186           (setq str (buffer-substring (match-beginning 0) (match-end 0)))
 187           (if (null (setq morse (rassoc str morse-code)))
 188               (goto-char (match-end 0))
 189             (replace-match
 190                   (if (string-equal "(" (car morse))
 191                       (if (setq paren (null paren)) "(" ")")
 192                     (car morse)) t)
 193             (if (looking-at "/")
 194                 (delete-char 1))))))))
 195
 196 ;;;###autoload
 197 (defun nato-region (beg end)
 198   "Convert all text in a given region to NATO phonetic alphabet."
 199   ;; Copied from morse-region. -- ashawley 2009-02-10
 200   (interactive "*r")
 201   (if (integerp end)
 202       (setq end (copy-marker end)))
 203   (save-excursion
 204     (let ((sep "")
 205           str nato)
 206       (goto-char beg)
 207       (while (< (point) end)
 208         (setq str (downcase (buffer-substring (point) (1+ (point)))))
 209         (cond ((looking-at "\\s-+")
 210                (goto-char (match-end 0))
 211                (setq sep ""))
 212               ((setq nato (assoc str nato-alphabet))
 213                (delete-char 1)
 214                (insert sep (cdr nato))
 215                (setq sep "-"))
 216               (t
 217                (forward-char 1)
 218                (setq sep "")))))))
 219
 220 ;;;###autoload
 221 (defun denato-region (beg end)
 222   "Convert NATO phonetic alphabet in region to ordinary ASCII text."
 223   ;; Copied from unmorse-region. -- ashawley 2009-02-10
 224   (interactive "*r")
 225   (if (integerp end)
 226       (setq end (copy-marker end)))
 227   (save-excursion
 228     (let (str paren nato)
 229       (goto-char beg)
 230       (while (< (point) end)
 231         (if (null (looking-at "[a-z]+"))
 232             (forward-char 1)
 233           (setq str (buffer-substring (match-beginning 0) (match-end 0)))
 234           (if (null (setq nato (rassoc (capitalize str) nato-alphabet)))
 235               (goto-char (match-end 0))
 236             (replace-match
 237                   (if (string-equal "(" (car nato))
 238                       (if (setq paren (null paren)) "(" ")")
 239                     (car nato)) t)
 240             (if (looking-at "-")
 241                 (delete-char 1))))))))
 242
 243 (provide 'morse)
 244
 245 ;;; morse.el ends here