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23f87bed | 1 | ;;; uudecode.el -- elisp native uudecode |
c113de23 | 2 | |
23f87bed | 3 | ;; Copyright (c) 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc. |
c113de23 GM |
4 | |
5 | ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu> | |
6 | ;; Keywords: uudecode news | |
7 | ||
715a2ca2 | 8 | ;; This file is part of GNU Emacs. |
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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 2, or (at your option) | |
13 | ;; 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; see the file COPYING. If not, write to the | |
22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | ;; Boston, MA 02111-1307, USA. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
c113de23 GM |
27 | ;;; Code: |
28 | ||
23f87bed MB |
29 | (autoload 'executable-find "executable") |
30 | ||
117b4b78 DL |
31 | (eval-when-compile (require 'cl)) |
32 | ||
05c2a83c DL |
33 | (eval-and-compile |
34 | (defalias 'uudecode-char-int | |
35 | (if (fboundp 'char-int) | |
36 | 'char-int | |
23f87bed | 37 | 'identity))) |
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38 | |
39 | (defcustom uudecode-decoder-program "uudecode" | |
40 | "*Non-nil value should be a string that names a uu decoder. | |
41 | The program should expect to read uu data on its standard | |
42 | input and write the converted data to its standard output." | |
43 | :type 'string | |
44 | :group 'gnus-extract) | |
45 | ||
46 | (defcustom uudecode-decoder-switches nil | |
47 | "*List of command line flags passed to `uudecode-decoder-program'." | |
48 | :group 'gnus-extract | |
49 | :type '(repeat string)) | |
50 | ||
23f87bed MB |
51 | (defcustom uudecode-use-external |
52 | (executable-find uudecode-decoder-program) | |
53 | "*Use external uudecode program." | |
bf247b6e | 54 | :version "22.1" |
23f87bed MB |
55 | :group 'gnus-extract |
56 | :type 'boolean) | |
57 | ||
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58 | (defconst uudecode-alphabet "\040-\140") |
59 | ||
60 | (defconst uudecode-begin-line "^begin[ \t]+[0-7][0-7][0-7][ \t]+\\(.*\\)$") | |
61 | (defconst uudecode-end-line "^end[ \t]*$") | |
62 | ||
63 | (defconst uudecode-body-line | |
64 | (let ((i 61) (str "^M")) | |
65 | (while (> (setq i (1- i)) 0) | |
66 | (setq str (concat str "[^a-z]"))) | |
67 | (concat str ".?$"))) | |
68 | ||
69 | (defvar uudecode-temporary-file-directory | |
70 | (cond ((fboundp 'temp-directory) (temp-directory)) | |
71 | ((boundp 'temporary-file-directory) temporary-file-directory) | |
72 | ("/tmp"))) | |
73 | ||
74 | ;;;###autoload | |
75 | (defun uudecode-decode-region-external (start end &optional file-name) | |
96403ac1 DL |
76 | "Uudecode region between START and END using external program. |
77 | If FILE-NAME is non-nil, save the result to FILE-NAME. The program | |
78 | used is specified by `uudecode-decoder-program'." | |
c113de23 | 79 | (interactive "r\nP") |
96403ac1 | 80 | (let ((cbuf (current-buffer)) tempfile firstline status) |
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81 | (save-excursion |
82 | (goto-char start) | |
83 | (when (re-search-forward uudecode-begin-line nil t) | |
84 | (forward-line 1) | |
85 | (setq firstline (point)) | |
86 | (cond ((null file-name)) | |
87 | ((stringp file-name)) | |
88 | (t | |
89 | (setq file-name (read-file-name "File to Name:" | |
90 | nil nil nil | |
91 | (match-string 1))))) | |
92 | (setq tempfile (if file-name | |
93 | (expand-file-name file-name) | |
23f87bed MB |
94 | (if (fboundp 'make-temp-file) |
95 | (let ((temporary-file-directory | |
96 | uudecode-temporary-file-directory)) | |
97 | (make-temp-file "uu")) | |
98 | (expand-file-name | |
99 | (make-temp-name "uu") | |
100 | uudecode-temporary-file-directory)))) | |
96403ac1 DL |
101 | (let ((cdir default-directory) |
102 | default-process-coding-system) | |
c113de23 | 103 | (unwind-protect |
96403ac1 | 104 | (with-temp-buffer |
c113de23 GM |
105 | (insert "begin 600 " (file-name-nondirectory tempfile) "\n") |
106 | (insert-buffer-substring cbuf firstline end) | |
107 | (cd (file-name-directory tempfile)) | |
108 | (apply 'call-process-region | |
109 | (point-min) | |
110 | (point-max) | |
111 | uudecode-decoder-program | |
112 | nil | |
113 | nil | |
114 | nil | |
115 | uudecode-decoder-switches)) | |
116 | (cd cdir) (set-buffer cbuf))) | |
117 | (if (file-exists-p tempfile) | |
118 | (unless file-name | |
119 | (goto-char start) | |
120 | (delete-region start end) | |
121 | (let (format-alist) | |
122 | (insert-file-contents-literally tempfile))) | |
123 | (message "Can not uudecode"))) | |
c113de23 GM |
124 | (ignore-errors (or file-name (delete-file tempfile)))))) |
125 | ||
c113de23 | 126 | ;;;###autoload |
23f87bed | 127 | (defun uudecode-decode-region-internal (start end &optional file-name) |
96403ac1 | 128 | "Uudecode region between START and END without using an external program. |
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129 | If FILE-NAME is non-nil, save the result to FILE-NAME." |
130 | (interactive "r\nP") | |
23f87bed | 131 | (let ((done nil) |
c113de23 GM |
132 | (counter 0) |
133 | (remain 0) | |
134 | (bits 0) | |
23f87bed | 135 | (lim 0) inputpos result |
c113de23 | 136 | (non-data-chars (concat "^" uudecode-alphabet))) |
23f87bed MB |
137 | (save-excursion |
138 | (goto-char start) | |
139 | (when (re-search-forward uudecode-begin-line nil t) | |
140 | (cond ((null file-name)) | |
141 | ((stringp file-name)) | |
142 | (t | |
143 | (setq file-name (expand-file-name | |
144 | (read-file-name "File to Name:" | |
145 | nil nil nil | |
146 | (match-string 1)))))) | |
147 | (forward-line 1) | |
148 | (skip-chars-forward non-data-chars end) | |
149 | (while (not done) | |
150 | (setq inputpos (point)) | |
151 | (setq remain 0 bits 0 counter 0) | |
152 | (cond | |
153 | ((> (skip-chars-forward uudecode-alphabet end) 0) | |
154 | (setq lim (point)) | |
155 | (setq remain | |
156 | (logand (- (uudecode-char-int (char-after inputpos)) 32) | |
157 | 63)) | |
158 | (setq inputpos (1+ inputpos)) | |
159 | (if (= remain 0) (setq done t)) | |
160 | (while (and (< inputpos lim) (> remain 0)) | |
161 | (setq bits (+ bits | |
162 | (logand | |
163 | (- | |
164 | (uudecode-char-int (char-after inputpos)) 32) | |
165 | 63))) | |
166 | (if (/= counter 0) (setq remain (1- remain))) | |
167 | (setq counter (1+ counter) | |
168 | inputpos (1+ inputpos)) | |
169 | (cond ((= counter 4) | |
170 | (setq result (cons | |
171 | (concat | |
172 | (char-to-string (lsh bits -16)) | |
173 | (char-to-string (logand (lsh bits -8) 255)) | |
174 | (char-to-string (logand bits 255))) | |
175 | result)) | |
176 | (setq bits 0 counter 0)) | |
177 | (t (setq bits (lsh bits 6))))))) | |
178 | (cond | |
179 | (done) | |
180 | ((> 0 remain) | |
181 | (error "uucode line ends unexpectly") | |
182 | (setq done t)) | |
183 | ((and (= (point) end) (not done)) | |
184 | ;;(error "uucode ends unexpectly") | |
185 | (setq done t)) | |
186 | ((= counter 3) | |
187 | (setq result (cons | |
188 | (concat | |
189 | (char-to-string (logand (lsh bits -16) 255)) | |
190 | (char-to-string (logand (lsh bits -8) 255))) | |
191 | result))) | |
192 | ((= counter 2) | |
193 | (setq result (cons | |
194 | (char-to-string (logand (lsh bits -10) 255)) | |
195 | result)))) | |
196 | (skip-chars-forward non-data-chars end)) | |
197 | (if file-name | |
198 | (let (default-enable-multibyte-characters) | |
199 | (with-temp-file file-name | |
200 | (insert (apply 'concat (nreverse result))))) | |
201 | (or (markerp end) (setq end (set-marker (make-marker) end))) | |
c113de23 | 202 | (goto-char start) |
23f87bed MB |
203 | (insert (apply 'concat (nreverse result))) |
204 | (delete-region (point) end)))))) | |
205 | ||
206 | ;;;###autoload | |
207 | (defun uudecode-decode-region (start end &optional file-name) | |
208 | "Uudecode region between START and END. | |
209 | If FILE-NAME is non-nil, save the result to FILE-NAME." | |
210 | (if uudecode-use-external | |
211 | (uudecode-decode-region-external start end file-name) | |
212 | (uudecode-decode-region-internal start end file-name))) | |
c113de23 GM |
213 | |
214 | (provide 'uudecode) | |
215 | ||
ab5796a9 | 216 | ;;; arch-tag: e1f09ed5-62b4-4677-9f13-4e81c4fe8ce3 |
c113de23 | 217 | ;;; uudecode.el ends here |