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Diffstat (limited to 'lisp/gnus/yenc.el')
| -rw-r--r-- | lisp/gnus/yenc.el | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/lisp/gnus/yenc.el b/lisp/gnus/yenc.el deleted file mode 100644 index cfac06d4f19..00000000000 --- a/lisp/gnus/yenc.el +++ /dev/null @@ -1,139 +0,0 @@ -;;; yenc.el --- elisp native yenc decoder - -;; Copyright (C) 2002-2016 Free Software Foundation, Inc. - -;; Author: Jesper Harder <harder@ifa.au.dk> -;; Keywords: yenc news - -;; 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>. - -;;; Commentary: - -;; Functions for decoding yenc encoded messages. -;; -;; Limitations: -;; -;; * Does not handle multipart messages. -;; * No support for external decoders. -;; * Doesn't check the crc32 checksum (if present). - -;;; Code: - -(eval-when-compile (require 'cl)) - -(defconst yenc-begin-line - "^=ybegin.*$") - -(defconst yenc-decoding-vector - [214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 - 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 - 248 249 250 251 252 253 254 255 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 - 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 - 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 - 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 - 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 - 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 - 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 - 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 - 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 - 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 - 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 - 208 209 210 211 212 213]) - -(defun yenc-first-part-p () - "Say whether the buffer contains the first part of a yEnc file." - (save-excursion - (goto-char (point-min)) - (re-search-forward "^=ybegin part=1 " nil t))) - -(defun yenc-last-part-p () - "Say whether the buffer contains the last part of a yEnc file." - (save-excursion - (goto-char (point-min)) - (let (total-size end-size) - (when (re-search-forward "^=ybegin.*size=\\([0-9]+\\)" nil t) - (setq total-size (match-string 1))) - (when (re-search-forward "^=ypart.*end=\\([0-9]+\\)" nil t) - (setq end-size (match-string 1))) - (and total-size - end-size - (string= total-size end-size))))) - -;;;###autoload -(defun yenc-decode-region (start end) - "Yenc decode region between START and END using an internal decoder." - (interactive "r") - (let (work-buffer) - (unwind-protect - (save-excursion - (goto-char start) - (when (re-search-forward yenc-begin-line end t) - (let ((first (match-end 0)) - (header-alist (yenc-parse-line (match-string 0))) - bytes last footer-alist char) - (when (re-search-forward "^=ypart.*$" end t) - (setq first (match-end 0))) - (when (re-search-forward "^=yend.*$" end t) - (setq last (match-beginning 0)) - (setq footer-alist (yenc-parse-line (match-string 0))) - (setq work-buffer (generate-new-buffer " *yenc-work*")) - (unless (featurep 'xemacs) - (with-current-buffer work-buffer (set-buffer-multibyte nil))) - (while (< first last) - (setq char (char-after first)) - (cond ((or (eq char ?\r) - (eq char ?\n))) - ((eq char ?=) - (setq char (char-after (incf first))) - (with-current-buffer work-buffer - (insert-char (mod (- char 106) 256) 1))) - (t - (with-current-buffer work-buffer - ;;(insert-char (mod (- char 42) 256) 1) - (insert-char (aref yenc-decoding-vector char) 1)))) - (incf first)) - (setq bytes (buffer-size work-buffer)) - (unless (and (= (cdr (assq 'size header-alist)) bytes) - (= (cdr (assq 'size footer-alist)) bytes)) - (message "Warning: Size mismatch while decoding.")) - (goto-char start) - (delete-region start end) - (insert-buffer-substring work-buffer)))) - (and work-buffer (kill-buffer work-buffer)))))) - -;;;###autoload -(defun yenc-extract-filename () - "Extract file name from an yenc header." - (save-excursion - (when (re-search-forward yenc-begin-line nil t) - (cdr (assoc 'name (yenc-parse-line (match-string 0))))))) - -(defun yenc-parse-line (str) - "Extract file name and size from STR." - (let (result name) - (when (string-match "^=y.*size=\\([0-9]+\\)" str) - (push (cons 'size (string-to-number (match-string 1 str))) result)) - (when (string-match "^=y.*name=\\(.*\\)$" str) - (setq name (match-string 1 str)) - ;; Remove trailing white space - (when (string-match " +$" name) - (setq name (substring name 0 (match-beginning 0)))) - (push (cons 'name name) result)) - result)) - -(provide 'yenc) - -;;; yenc.el ends here |