Commit | Line | Data |
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a22f4c7d | 1 | ;;; hexl.el --- edit a file in a hex dump format using the hexl filter. |
e5167999 | 2 | |
0c4b86da | 3 | ;; Copyright (C) 1989, 1994, 1998 Free Software Foundation, Inc. |
a2535589 | 4 | |
3a801d0c | 5 | ;; Author: Keith Gabryelski <ag@wheaties.ai.mit.edu> |
b7f66977 RS |
6 | ;; Maintainer: FSF |
7 | ;; Keywords: data | |
3a801d0c | 8 | |
a2535589 JA |
9 | ;; This file is part of GNU Emacs. |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
a2535589 JA |
14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
a2535589 | 25 | |
e5167999 ER |
26 | ;;; Commentary: |
27 | ||
e41b2db1 ER |
28 | ;; This package implements a major mode for editing binary files. It uses |
29 | ;; a program called hexl, supplied with the GNU Emacs distribution, that | |
30 | ;; can filter a binary into an editable format or from the format back into | |
31 | ;; binary. For full instructions, invoke `hexl-mode' on an empty buffer and | |
32 | ;; do `M-x describe-mode'. | |
33 | ;; | |
a2535589 JA |
34 | ;; This may be useful in your .emacs: |
35 | ;; | |
36 | ;; (autoload 'hexl-find-file "hexl" | |
37 | ;; "Edit file FILENAME in hexl-mode." t) | |
38 | ;; | |
39 | ;; (define-key global-map "\C-c\C-h" 'hexl-find-file) | |
40 | ;; | |
41 | ;; NOTE: Remember to change HEXL-PROGRAM or HEXL-OPTIONS if needed. | |
42 | ;; | |
43 | ;; Currently hexl only supports big endian hex output with 16 bit | |
44 | ;; grouping. | |
45 | ;; | |
46 | ;; -iso in `hexl-options' will allow iso characters to display in the | |
47 | ;; ASCII region of the screen (if your emacs supports this) instead of | |
48 | ;; changing them to dots. | |
49 | ||
e5167999 ER |
50 | ;;; Code: |
51 | ||
a2535589 JA |
52 | ;; |
53 | ;; vars here | |
54 | ;; | |
55 | ||
00ed33e7 RS |
56 | (defgroup hexl nil |
57 | "Edit a file in a hex dump format using the hexl filter." | |
58 | :group 'data) | |
59 | ||
60 | ||
61 | (defcustom hexl-program "hexl" | |
65e5f4bc | 62 | "The program that will hexlify and dehexlify its stdin. |
57f07931 | 63 | `hexl-program' will always be concatenated with `hexl-options' |
00ed33e7 RS |
64 | and \"-de\" when dehexlifying a buffer." |
65 | :type 'string | |
66 | :group 'hexl) | |
a2535589 | 67 | |
00ed33e7 | 68 | (defcustom hexl-iso "" |
a2535589 | 69 | "If your emacs can handle ISO characters, this should be set to |
00ed33e7 RS |
70 | \"-iso\" otherwise it should be \"\"." |
71 | :type 'string | |
72 | :group 'hexl) | |
a2535589 | 73 | |
00ed33e7 RS |
74 | (defcustom hexl-options (format "-hex %s" hexl-iso) |
75 | "Options to hexl-program that suit your needs." | |
76 | :type 'string | |
77 | :group 'hexl) | |
a2535589 | 78 | |
00ed33e7 | 79 | (defcustom hexlify-command |
7e3a7716 AI |
80 | (format "%s %s" |
81 | (shell-quote-argument | |
82 | (expand-file-name hexl-program exec-directory)) | |
83 | hexl-options) | |
00ed33e7 RS |
84 | "The command to use to hexlify a buffer." |
85 | :type 'string | |
86 | :group 'hexl) | |
a2535589 | 87 | |
00ed33e7 | 88 | (defcustom dehexlify-command |
7e3a7716 AI |
89 | (format "%s -de %s" |
90 | (shell-quote-argument | |
91 | (expand-file-name hexl-program exec-directory)) | |
92 | hexl-options) | |
00ed33e7 RS |
93 | "The command to use to unhexlify a buffer." |
94 | :type 'string | |
95 | :group 'hexl) | |
a2535589 | 96 | |
db6c5b92 SE |
97 | (defcustom hexl-follow-ascii t |
98 | "If non-nil then highlight the ASCII character corresponding to point." | |
99 | :type 'boolean | |
cd32a7ba DN |
100 | :group 'hexl |
101 | :version "20.3") | |
db6c5b92 | 102 | |
a2535589 JA |
103 | (defvar hexl-max-address 0 |
104 | "Maximum offset into hexl buffer.") | |
105 | ||
106 | (defvar hexl-mode-map nil) | |
107 | ||
f39c6650 RS |
108 | (defvar hexl-mode-old-local-map) |
109 | (defvar hexl-mode-old-mode-name) | |
110 | (defvar hexl-mode-old-major-mode) | |
0e4889b2 RS |
111 | (defvar hexl-mode-old-write-contents-hooks) |
112 | (defvar hexl-mode-old-require-final-newline) | |
113 | (defvar hexl-mode-old-syntax-table) | |
f39c6650 | 114 | |
db6c5b92 SE |
115 | (defvar hexl-ascii-overlay nil |
116 | "Overlay used to highlight ASCII element corresponding to current point.") | |
117 | (make-variable-buffer-local 'hexl-ascii-overlay) | |
118 | ||
a2535589 JA |
119 | ;; routines |
120 | ||
2d902813 RS |
121 | (put 'hexl-mode 'mode-class 'special) |
122 | ||
31c75fa7 | 123 | ;;;###autoload |
a2535589 | 124 | (defun hexl-mode (&optional arg) |
330bd7c3 PR |
125 | "\\<hexl-mode-map>A mode for editing binary files in hex dump format. |
126 | This is not an ordinary major mode; it alters some aspects | |
127 | if the current mode's behavior, but not all; also, you can exit | |
128 | Hexl mode and return to the previous mode using `hexl-mode-exit'. | |
a2535589 JA |
129 | |
130 | This function automatically converts a buffer into the hexl format | |
131 | using the function `hexlify-buffer'. | |
132 | ||
8a1281b5 | 133 | Each line in the buffer has an \"address\" (displayed in hexadecimal) |
a2535589 JA |
134 | representing the offset into the file that the characters on this line |
135 | are at and 16 characters from the file (displayed as hexadecimal | |
136 | values grouped every 16 bits) and as their ASCII values. | |
137 | ||
138 | If any of the characters (displayed as ASCII characters) are | |
139 | unprintable (control or meta characters) they will be replaced as | |
140 | periods. | |
141 | ||
8a1281b5 RS |
142 | If `hexl-mode' is invoked with an argument the buffer is assumed to be |
143 | in hexl format. | |
a2535589 JA |
144 | |
145 | A sample format: | |
146 | ||
147 | HEX ADDR: 0001 0203 0405 0607 0809 0a0b 0c0d 0e0f ASCII-TEXT | |
148 | -------- ---- ---- ---- ---- ---- ---- ---- ---- ---------------- | |
149 | 00000000: 5468 6973 2069 7320 6865 786c 2d6d 6f64 This is hexl-mod | |
150 | 00000010: 652e 2020 4561 6368 206c 696e 6520 7265 e. Each line re | |
151 | 00000020: 7072 6573 656e 7473 2031 3620 6279 7465 presents 16 byte | |
152 | 00000030: 7320 6173 2068 6578 6164 6563 696d 616c s as hexadecimal | |
153 | 00000040: 2041 5343 4949 0a61 6e64 2070 7269 6e74 ASCII.and print | |
154 | 00000050: 6162 6c65 2041 5343 4949 2063 6861 7261 able ASCII chara | |
155 | 00000060: 6374 6572 732e 2020 416e 7920 636f 6e74 cters. Any cont | |
156 | 00000070: 726f 6c20 6f72 206e 6f6e 2d41 5343 4949 rol or non-ASCII | |
157 | 00000080: 2063 6861 7261 6374 6572 730a 6172 6520 characters.are | |
158 | 00000090: 6469 7370 6c61 7965 6420 6173 2070 6572 displayed as per | |
159 | 000000a0: 696f 6473 2069 6e20 7468 6520 7072 696e iods in the prin | |
160 | 000000b0: 7461 626c 6520 6368 6172 6163 7465 7220 table character | |
161 | 000000c0: 7265 6769 6f6e 2e0a region.. | |
162 | ||
163 | Movement is as simple as movement in a normal emacs text buffer. Most | |
164 | cursor movement bindings are the same (ie. Use \\[hexl-backward-char], \\[hexl-forward-char], \\[hexl-next-line], and \\[hexl-previous-line] | |
165 | to move the cursor left, right, down, and up). | |
166 | ||
167 | Advanced cursor movement commands (ala \\[hexl-beginning-of-line], \\[hexl-end-of-line], \\[hexl-beginning-of-buffer], and \\[hexl-end-of-buffer]) are | |
168 | also supported. | |
169 | ||
170 | There are several ways to change text in hexl mode: | |
171 | ||
172 | ASCII characters (character between space (0x20) and tilde (0x7E)) are | |
173 | bound to self-insert so you can simply type the character and it will | |
174 | insert itself (actually overstrike) into the buffer. | |
175 | ||
176 | \\[hexl-quoted-insert] followed by another keystroke allows you to insert the key even if | |
177 | it isn't bound to self-insert. An octal number can be supplied in place | |
178 | of another key to insert the octal number's ASCII representation. | |
179 | ||
180 | \\[hexl-insert-hex-char] will insert a given hexadecimal value (if it is between 0 and 0xFF) | |
181 | into the buffer at the current point. | |
182 | ||
183 | \\[hexl-insert-octal-char] will insert a given octal value (if it is between 0 and 0377) | |
184 | into the buffer at the current point. | |
185 | ||
186 | \\[hexl-insert-decimal-char] will insert a given decimal value (if it is between 0 and 255) | |
187 | into the buffer at the current point. | |
188 | ||
a2535589 JA |
189 | \\[hexl-mode-exit] will exit hexl-mode. |
190 | ||
31c75fa7 RS |
191 | Note: saving the file with any of the usual Emacs commands |
192 | will actually convert it back to binary format while saving. | |
a2535589 | 193 | |
330bd7c3 | 194 | You can use \\[hexl-find-file] to visit a file in Hexl mode. |
a2535589 JA |
195 | |
196 | \\[describe-bindings] for advanced commands." | |
197 | (interactive "p") | |
330bd7c3 | 198 | (unless (eq major-mode 'hexl-mode) |
753c1309 RS |
199 | (let ((modified (buffer-modified-p)) |
200 | (inhibit-read-only t) | |
201 | (original-point (1- (point))) | |
202 | max-address) | |
203 | (and (eobp) (not (bobp)) | |
204 | (setq original-point (1- original-point))) | |
205 | (if (not (or (eq arg 1) (not arg))) | |
206 | ;; if no argument then we guess at hexl-max-address | |
207 | (setq max-address (+ (* (/ (1- (buffer-size)) 68) 16) 15)) | |
208 | (setq max-address (1- (buffer-size))) | |
209 | (hexlify-buffer) | |
210 | (set-buffer-modified-p modified)) | |
211 | (make-local-variable 'hexl-max-address) | |
212 | (setq hexl-max-address max-address) | |
213 | (hexl-goto-address original-point)) | |
214 | ||
0e4889b2 RS |
215 | ;; We do not turn off the old major mode; instead we just |
216 | ;; override most of it. That way, we can restore it perfectly. | |
a2535589 JA |
217 | (make-local-variable 'hexl-mode-old-local-map) |
218 | (setq hexl-mode-old-local-map (current-local-map)) | |
219 | (use-local-map hexl-mode-map) | |
220 | ||
221 | (make-local-variable 'hexl-mode-old-mode-name) | |
222 | (setq hexl-mode-old-mode-name mode-name) | |
223 | (setq mode-name "Hexl") | |
224 | ||
225 | (make-local-variable 'hexl-mode-old-major-mode) | |
226 | (setq hexl-mode-old-major-mode major-mode) | |
227 | (setq major-mode 'hexl-mode) | |
228 | ||
0e4889b2 RS |
229 | (make-local-variable 'hexl-mode-old-syntax-table) |
230 | (setq hexl-mode-old-syntax-table (syntax-table)) | |
231 | (set-syntax-table (standard-syntax-table)) | |
232 | ||
233 | (make-local-variable 'hexl-mode-old-write-contents-hooks) | |
234 | (setq hexl-mode-old-write-contents-hooks write-contents-hooks) | |
31c75fa7 | 235 | (make-local-variable 'write-contents-hooks) |
c6fcafde | 236 | (add-hook 'write-contents-hooks 'hexl-save-buffer) |
31c75fa7 | 237 | |
0e4889b2 RS |
238 | (make-local-variable 'hexl-mode-old-require-final-newline) |
239 | (setq hexl-mode-old-require-final-newline require-final-newline) | |
240 | (make-local-variable 'require-final-newline) | |
241 | (setq require-final-newline nil) | |
242 | ||
243 | ;; Add hooks to rehexlify or dehexlify on various events. | |
c3de2bf0 RS |
244 | (make-local-hook 'after-revert-hook) |
245 | (add-hook 'after-revert-hook 'hexl-after-revert-hook nil t) | |
246 | ||
0e4889b2 | 247 | (make-local-hook 'change-major-mode-hook) |
db6c5b92 SE |
248 | (add-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer nil t) |
249 | ||
250 | (if hexl-follow-ascii (hexl-follow-ascii 1))) | |
7bfff21e | 251 | (run-hooks 'hexl-mode-hook)) |
a2535589 | 252 | |
c3de2bf0 | 253 | (defun hexl-after-revert-hook () |
059c2e18 | 254 | (setq hexl-max-address (1- (buffer-size))) |
c3de2bf0 RS |
255 | (hexlify-buffer) |
256 | (set-buffer-modified-p nil)) | |
257 | ||
ac2e902d JB |
258 | (defvar hexl-in-save-buffer nil) |
259 | ||
a2535589 JA |
260 | (defun hexl-save-buffer () |
261 | "Save a hexl format buffer as binary in visited file if modified." | |
262 | (interactive) | |
ac2e902d JB |
263 | (if hexl-in-save-buffer nil |
264 | (set-buffer-modified-p (if (buffer-modified-p) | |
265 | (save-excursion | |
266 | (let ((buf (generate-new-buffer " hexl")) | |
267 | (name (buffer-name)) | |
268 | (file-name (buffer-file-name)) | |
269 | (start (point-min)) | |
270 | (end (point-max)) | |
271 | modified) | |
272 | (set-buffer buf) | |
273 | (insert-buffer-substring name start end) | |
274 | (set-buffer name) | |
275 | (dehexlify-buffer) | |
276 | ;; Prevent infinite recursion. | |
338992a5 | 277 | (let ((hexl-in-save-buffer t)) |
ac2e902d JB |
278 | (save-buffer)) |
279 | (setq modified (buffer-modified-p)) | |
280 | (delete-region (point-min) (point-max)) | |
281 | (insert-buffer-substring buf start end) | |
282 | (kill-buffer buf) | |
283 | modified)) | |
284 | (message "(No changes need to be saved)") | |
285 | nil)) | |
286 | ;; Return t to indicate we have saved t | |
287 | t)) | |
a2535589 | 288 | |
31c75fa7 | 289 | ;;;###autoload |
a2535589 JA |
290 | (defun hexl-find-file (filename) |
291 | "Edit file FILENAME in hexl-mode. | |
a2535589 JA |
292 | Switch to a buffer visiting file FILENAME, creating one in none exists." |
293 | (interactive "fFilename: ") | |
338992a5 | 294 | (find-file-literally filename) |
a2535589 JA |
295 | (if (not (eq major-mode 'hexl-mode)) |
296 | (hexl-mode))) | |
297 | ||
298 | (defun hexl-mode-exit (&optional arg) | |
31c75fa7 | 299 | "Exit Hexl mode, returning to previous mode. |
a2535589 JA |
300 | With arg, don't unhexlify buffer." |
301 | (interactive "p") | |
302 | (if (or (eq arg 1) (not arg)) | |
303 | (let ((modified (buffer-modified-p)) | |
900014dd | 304 | (inhibit-read-only t) |
a2535589 | 305 | (original-point (1+ (hexl-current-address)))) |
a2535589 | 306 | (dehexlify-buffer) |
95d87237 | 307 | (remove-hook 'write-contents-hooks 'hexl-save-buffer) |
a2535589 | 308 | (set-buffer-modified-p modified) |
a2535589 | 309 | (goto-char original-point))) |
0e4889b2 RS |
310 | |
311 | (remove-hook 'after-revert-hook 'hexl-after-revert-hook t) | |
312 | (remove-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer t) | |
8e7df2e6 SE |
313 | (remove-hook 'post-command-hook 'hexl-follow-ascii-find t) |
314 | (setq hexl-ascii-overlay nil) | |
0e4889b2 RS |
315 | |
316 | (setq write-contents-hooks hexl-mode-old-write-contents-hooks) | |
317 | (setq require-final-newline hexl-mode-old-require-final-newline) | |
a2535589 JA |
318 | (setq mode-name hexl-mode-old-mode-name) |
319 | (use-local-map hexl-mode-old-local-map) | |
0e4889b2 | 320 | (set-syntax-table hexl-mode-old-syntax-table) |
a2535589 | 321 | (setq major-mode hexl-mode-old-major-mode) |
8eeac2ce RS |
322 | (force-mode-line-update)) |
323 | ||
324 | (defun hexl-maybe-dehexlify-buffer () | |
325 | "Convert a hexl format buffer to binary. | |
326 | Ask the user for confirmation." | |
327 | (if (y-or-n-p "Convert contents back to binary format? ") | |
328 | (let ((modified (buffer-modified-p)) | |
329 | (inhibit-read-only t) | |
330 | (original-point (1+ (hexl-current-address)))) | |
331 | (dehexlify-buffer) | |
95d87237 | 332 | (remove-hook 'write-contents-hooks 'hexl-save-buffer) |
8eeac2ce RS |
333 | (set-buffer-modified-p modified) |
334 | (goto-char original-point)))) | |
a2535589 | 335 | |
6bbb008e | 336 | (defun hexl-current-address (&optional validate) |
a2535589 JA |
337 | "Return current hexl-address." |
338 | (interactive) | |
339 | (let ((current-column (- (% (point) 68) 11)) | |
340 | (hexl-address 0)) | |
6bbb008e RS |
341 | (if (< current-column 0) |
342 | (if validate | |
343 | (error "Point is not on a character in the file") | |
344 | (setq current-column 0))) | |
345 | (setq hexl-address | |
346 | (+ (* (/ (point) 68) 16) | |
347 | (if (>= current-column 41) | |
348 | (- current-column 41) | |
349 | (/ (- current-column (/ current-column 5)) 2)))) | |
a2535589 JA |
350 | hexl-address)) |
351 | ||
352 | (defun hexl-address-to-marker (address) | |
059c2e18 | 353 | "Return buffer position for ADDRESS." |
a2535589 JA |
354 | (interactive "nAddress: ") |
355 | (+ (* (/ address 16) 68) 11 (/ (* (% address 16) 5) 2))) | |
356 | ||
357 | (defun hexl-goto-address (address) | |
358 | "Goto hexl-mode (decimal) address ADDRESS. | |
a2535589 JA |
359 | Signal error if ADDRESS out of range." |
360 | (interactive "nAddress: ") | |
361 | (if (or (< address 0) (> address hexl-max-address)) | |
19e31f7c | 362 | (error "Out of hexl region")) |
a2535589 JA |
363 | (goto-char (hexl-address-to-marker address))) |
364 | ||
365 | (defun hexl-goto-hex-address (hex-address) | |
4c8c7ae9 | 366 | "Go to hexl-mode address (hex string) HEX-ADDRESS. |
a2535589 JA |
367 | Signal error if HEX-ADDRESS is out of range." |
368 | (interactive "sHex Address: ") | |
369 | (hexl-goto-address (hexl-hex-string-to-integer hex-address))) | |
370 | ||
371 | (defun hexl-hex-string-to-integer (hex-string) | |
372 | "Return decimal integer for HEX-STRING." | |
373 | (interactive "sHex number: ") | |
374 | (let ((hex-num 0)) | |
375 | (while (not (equal hex-string "")) | |
376 | (setq hex-num (+ (* hex-num 16) | |
377 | (hexl-hex-char-to-integer (string-to-char hex-string)))) | |
378 | (setq hex-string (substring hex-string 1))) | |
379 | hex-num)) | |
380 | ||
381 | (defun hexl-octal-string-to-integer (octal-string) | |
382 | "Return decimal integer for OCTAL-STRING." | |
383 | (interactive "sOctal number: ") | |
384 | (let ((oct-num 0)) | |
385 | (while (not (equal octal-string "")) | |
386 | (setq oct-num (+ (* oct-num 8) | |
387 | (hexl-oct-char-to-integer | |
388 | (string-to-char octal-string)))) | |
389 | (setq octal-string (substring octal-string 1))) | |
390 | oct-num)) | |
391 | ||
392 | ;; move point functions | |
393 | ||
394 | (defun hexl-backward-char (arg) | |
395 | "Move to left ARG bytes (right if ARG negative) in hexl-mode." | |
396 | (interactive "p") | |
397 | (hexl-goto-address (- (hexl-current-address) arg))) | |
398 | ||
399 | (defun hexl-forward-char (arg) | |
400 | "Move right ARG bytes (left if ARG negative) in hexl-mode." | |
401 | (interactive "p") | |
402 | (hexl-goto-address (+ (hexl-current-address) arg))) | |
403 | ||
404 | (defun hexl-backward-short (arg) | |
405 | "Move to left ARG shorts (right if ARG negative) in hexl-mode." | |
406 | (interactive "p") | |
407 | (hexl-goto-address (let ((address (hexl-current-address))) | |
408 | (if (< arg 0) | |
409 | (progn | |
410 | (setq arg (- arg)) | |
411 | (while (> arg 0) | |
412 | (if (not (equal address (logior address 3))) | |
413 | (if (> address hexl-max-address) | |
414 | (progn | |
415 | (message "End of buffer.") | |
416 | (setq address hexl-max-address)) | |
417 | (setq address (logior address 3))) | |
418 | (if (> address hexl-max-address) | |
419 | (progn | |
420 | (message "End of buffer.") | |
421 | (setq address hexl-max-address)) | |
422 | (setq address (+ address 4)))) | |
423 | (setq arg (1- arg))) | |
424 | (if (> address hexl-max-address) | |
425 | (progn | |
426 | (message "End of buffer.") | |
427 | (setq address hexl-max-address)) | |
428 | (setq address (logior address 3)))) | |
429 | (while (> arg 0) | |
430 | (if (not (equal address (logand address -4))) | |
431 | (setq address (logand address -4)) | |
432 | (if (not (equal address 0)) | |
433 | (setq address (- address 4)) | |
434 | (message "Beginning of buffer."))) | |
435 | (setq arg (1- arg)))) | |
436 | address))) | |
437 | ||
438 | (defun hexl-forward-short (arg) | |
439 | "Move right ARG shorts (left if ARG negative) in hexl-mode." | |
440 | (interactive "p") | |
441 | (hexl-backward-short (- arg))) | |
442 | ||
443 | (defun hexl-backward-word (arg) | |
444 | "Move to left ARG words (right if ARG negative) in hexl-mode." | |
445 | (interactive "p") | |
446 | (hexl-goto-address (let ((address (hexl-current-address))) | |
447 | (if (< arg 0) | |
448 | (progn | |
449 | (setq arg (- arg)) | |
450 | (while (> arg 0) | |
451 | (if (not (equal address (logior address 7))) | |
452 | (if (> address hexl-max-address) | |
453 | (progn | |
454 | (message "End of buffer.") | |
455 | (setq address hexl-max-address)) | |
456 | (setq address (logior address 7))) | |
457 | (if (> address hexl-max-address) | |
458 | (progn | |
459 | (message "End of buffer.") | |
460 | (setq address hexl-max-address)) | |
461 | (setq address (+ address 8)))) | |
462 | (setq arg (1- arg))) | |
463 | (if (> address hexl-max-address) | |
464 | (progn | |
465 | (message "End of buffer.") | |
466 | (setq address hexl-max-address)) | |
467 | (setq address (logior address 7)))) | |
468 | (while (> arg 0) | |
469 | (if (not (equal address (logand address -8))) | |
470 | (setq address (logand address -8)) | |
471 | (if (not (equal address 0)) | |
472 | (setq address (- address 8)) | |
473 | (message "Beginning of buffer."))) | |
474 | (setq arg (1- arg)))) | |
475 | address))) | |
476 | ||
477 | (defun hexl-forward-word (arg) | |
478 | "Move right ARG words (left if ARG negative) in hexl-mode." | |
479 | (interactive "p") | |
480 | (hexl-backward-word (- arg))) | |
481 | ||
482 | (defun hexl-previous-line (arg) | |
4c8c7ae9 JB |
483 | "Move vertically up ARG lines [16 bytes] (down if ARG negative) in hexl-mode. |
484 | If there is byte at the target address move to the last byte in that line." | |
a2535589 JA |
485 | (interactive "p") |
486 | (hexl-next-line (- arg))) | |
487 | ||
488 | (defun hexl-next-line (arg) | |
4c8c7ae9 JB |
489 | "Move vertically down ARG lines [16 bytes] (up if ARG negative) in hexl-mode. |
490 | If there is no byte at the target address move to the last byte in that line." | |
a2535589 | 491 | (interactive "p") |
e8a57935 | 492 | (hexl-goto-address (let ((address (+ (hexl-current-address) (* arg 16)))) |
a2535589 JA |
493 | (if (and (< arg 0) (< address 0)) |
494 | (progn (message "Out of hexl region.") | |
495 | (setq address | |
496 | (% (hexl-current-address) 16))) | |
497 | (if (and (> address hexl-max-address) | |
498 | (< (% hexl-max-address 16) (% address 16))) | |
499 | (setq address hexl-max-address) | |
500 | (if (> address hexl-max-address) | |
501 | (progn (message "Out of hexl region.") | |
502 | (setq | |
503 | address | |
504 | (+ (logand hexl-max-address -16) | |
505 | (% (hexl-current-address) 16))))))) | |
506 | address))) | |
507 | ||
508 | (defun hexl-beginning-of-buffer (arg) | |
4c8c7ae9 JB |
509 | "Move to the beginning of the hexl buffer. |
510 | Leaves `hexl-mark' at previous position. | |
511 | With prefix arg N, puts point N bytes of the way from the true beginning." | |
a2535589 JA |
512 | (interactive "p") |
513 | (push-mark (point)) | |
514 | (hexl-goto-address (+ 0 (1- arg)))) | |
515 | ||
516 | (defun hexl-end-of-buffer (arg) | |
4c8c7ae9 | 517 | "Go to `hexl-max-address' minus ARG." |
a2535589 JA |
518 | (interactive "p") |
519 | (push-mark (point)) | |
520 | (hexl-goto-address (- hexl-max-address (1- arg)))) | |
521 | ||
522 | (defun hexl-beginning-of-line () | |
523 | "Goto beginning of line in hexl mode." | |
524 | (interactive) | |
525 | (goto-char (+ (* (/ (point) 68) 68) 11))) | |
526 | ||
527 | (defun hexl-end-of-line () | |
528 | "Goto end of line in hexl mode." | |
529 | (interactive) | |
530 | (hexl-goto-address (let ((address (logior (hexl-current-address) 15))) | |
531 | (if (> address hexl-max-address) | |
532 | (setq address hexl-max-address)) | |
533 | address))) | |
534 | ||
535 | (defun hexl-scroll-down (arg) | |
536 | "Scroll hexl buffer window upward ARG lines; or near full window if no ARG." | |
537 | (interactive "P") | |
538 | (if (null arg) | |
539 | (setq arg (1- (window-height))) | |
540 | (setq arg (prefix-numeric-value arg))) | |
541 | (hexl-scroll-up (- arg))) | |
542 | ||
543 | (defun hexl-scroll-up (arg) | |
544 | "Scroll hexl buffer window upward ARG lines; or near full window if no ARG." | |
545 | (interactive "P") | |
546 | (if (null arg) | |
547 | (setq arg (1- (window-height))) | |
548 | (setq arg (prefix-numeric-value arg))) | |
549 | (let ((movement (* arg 16)) | |
550 | (address (hexl-current-address))) | |
551 | (if (or (> (+ address movement) hexl-max-address) | |
552 | (< (+ address movement) 0)) | |
553 | (message "Out of hexl region.") | |
554 | (hexl-goto-address (+ address movement)) | |
555 | (recenter 0)))) | |
556 | ||
557 | (defun hexl-beginning-of-1k-page () | |
65e5f4bc | 558 | "Go to beginning of 1k boundary." |
a2535589 JA |
559 | (interactive) |
560 | (hexl-goto-address (logand (hexl-current-address) -1024))) | |
561 | ||
562 | (defun hexl-end-of-1k-page () | |
65e5f4bc | 563 | "Go to end of 1k boundary." |
a2535589 JA |
564 | (interactive) |
565 | (hexl-goto-address (let ((address (logior (hexl-current-address) 1023))) | |
566 | (if (> address hexl-max-address) | |
567 | (setq address hexl-max-address)) | |
568 | address))) | |
569 | ||
570 | (defun hexl-beginning-of-512b-page () | |
65e5f4bc | 571 | "Go to beginning of 512 byte boundary." |
a2535589 JA |
572 | (interactive) |
573 | (hexl-goto-address (logand (hexl-current-address) -512))) | |
574 | ||
575 | (defun hexl-end-of-512b-page () | |
65e5f4bc | 576 | "Go to end of 512 byte boundary." |
a2535589 JA |
577 | (interactive) |
578 | (hexl-goto-address (let ((address (logior (hexl-current-address) 511))) | |
579 | (if (> address hexl-max-address) | |
580 | (setq address hexl-max-address)) | |
581 | address))) | |
582 | ||
583 | (defun hexl-quoted-insert (arg) | |
584 | "Read next input character and insert it. | |
585 | Useful for inserting control characters. | |
586 | You may also type up to 3 octal digits, to insert a character with that code" | |
587 | (interactive "p") | |
588 | (hexl-insert-char (read-quoted-char) arg)) | |
589 | ||
590 | ;00000000: 0011 2233 4455 6677 8899 aabb ccdd eeff 0123456789ABCDEF | |
591 | ||
f4e3d4eb | 592 | ;;;###autoload |
a2535589 | 593 | (defun hexlify-buffer () |
aa3757b8 RS |
594 | "Convert a binary buffer to hexl format. |
595 | This discards the buffer's undo information." | |
a2535589 | 596 | (interactive) |
aa3757b8 RS |
597 | (and buffer-undo-list |
598 | (or (y-or-n-p "Converting to hexl format discards undo info; ok? ") | |
599 | (error "Aborted"))) | |
600 | (setq buffer-undo-list nil) | |
a749e5e5 EZ |
601 | ;; Don't decode text in the ASCII part of `hexl' program output. |
602 | (let ((coding-system-for-read 'raw-text) | |
0716afa2 | 603 | (coding-system-for-write buffer-file-coding-system) |
aa3757b8 | 604 | (buffer-undo-list t)) |
059c2e18 PR |
605 | (shell-command-on-region (point-min) (point-max) hexlify-command t) |
606 | (if (> (point) (hexl-address-to-marker hexl-max-address)) | |
607 | (hexl-goto-address hexl-max-address)))) | |
a2535589 JA |
608 | |
609 | (defun dehexlify-buffer () | |
aa3757b8 RS |
610 | "Convert a hexl format buffer to binary. |
611 | This discards the buffer's undo information." | |
a2535589 | 612 | (interactive) |
aa3757b8 RS |
613 | (and buffer-undo-list |
614 | (or (y-or-n-p "Converting from hexl format discards undo info; ok? ") | |
615 | (error "Aborted"))) | |
616 | (setq buffer-undo-list nil) | |
a749e5e5 | 617 | (let ((coding-system-for-write 'raw-text) |
0716afa2 | 618 | (coding-system-for-read buffer-file-coding-system) |
aa3757b8 | 619 | (buffer-undo-list t)) |
10b501e3 | 620 | (shell-command-on-region (point-min) (point-max) dehexlify-command t))) |
a2535589 JA |
621 | |
622 | (defun hexl-char-after-point () | |
623 | "Return char for ASCII hex digits at point." | |
686fc9ab RS |
624 | (hexl-htoi (char-after (point)) |
625 | (char-after (1+ (point))))) | |
a2535589 JA |
626 | |
627 | (defun hexl-htoi (lh rh) | |
628 | "Hex (char) LH (char) RH to integer." | |
629 | (+ (* (hexl-hex-char-to-integer lh) 16) | |
630 | (hexl-hex-char-to-integer rh))) | |
631 | ||
632 | (defun hexl-hex-char-to-integer (character) | |
633 | "Take a char and return its value as if it was a hex digit." | |
634 | (if (and (>= character ?0) (<= character ?9)) | |
635 | (- character ?0) | |
636 | (let ((ch (logior character 32))) | |
637 | (if (and (>= ch ?a) (<= ch ?f)) | |
638 | (- ch (- ?a 10)) | |
19e31f7c | 639 | (error "Invalid hex digit `%c'" ch))))) |
a2535589 JA |
640 | |
641 | (defun hexl-oct-char-to-integer (character) | |
642 | "Take a char and return its value as if it was a octal digit." | |
643 | (if (and (>= character ?0) (<= character ?7)) | |
644 | (- character ?0) | |
19e31f7c | 645 | (error "Invalid octal digit `%c'" character))) |
a2535589 JA |
646 | |
647 | (defun hexl-printable-character (ch) | |
648 | "Return a displayable string for character CH." | |
649 | (format "%c" (if hexl-iso | |
650 | (if (or (< ch 32) (and (>= ch 127) (< ch 160))) | |
651 | 46 | |
652 | ch) | |
653 | (if (or (< ch 32) (>= ch 127)) | |
654 | 46 | |
655 | ch)))) | |
656 | ||
657 | (defun hexl-self-insert-command (arg) | |
658 | "Insert this character." | |
659 | (interactive "p") | |
660 | (hexl-insert-char last-command-char arg)) | |
661 | ||
662 | (defun hexl-insert-char (ch num) | |
663 | "Insert a character in a hexl buffer." | |
6bbb008e | 664 | (let ((address (hexl-current-address t))) |
a2535589 | 665 | (while (> num 0) |
6bbb008e RS |
666 | (let ((hex-position |
667 | (+ (* (/ address 16) 68) | |
668 | 11 | |
669 | (* 2 (% address 16)) | |
670 | (/ (% address 16) 2))) | |
671 | (ascii-position | |
672 | (+ (* (/ address 16) 68) 52 (% address 16))) | |
673 | at-ascii-position) | |
674 | (if (= (point) ascii-position) | |
675 | (setq at-ascii-position t)) | |
676 | (goto-char hex-position) | |
677 | (delete-char 2) | |
678 | (insert (format "%02x" ch)) | |
679 | (goto-char ascii-position) | |
680 | (delete-char 1) | |
681 | (insert (hexl-printable-character ch)) | |
682 | (or (eq address hexl-max-address) | |
683 | (setq address (1+ address))) | |
684 | (hexl-goto-address address) | |
685 | (if at-ascii-position | |
686 | (progn | |
687 | (beginning-of-line) | |
688 | (forward-char 51) | |
689 | (forward-char (% address 16))))) | |
a2535589 JA |
690 | (setq num (1- num))))) |
691 | ||
692 | ;; hex conversion | |
693 | ||
694 | (defun hexl-insert-hex-char (arg) | |
695 | "Insert a ASCII char ARG times at point for a given hexadecimal number." | |
696 | (interactive "p") | |
697 | (let ((num (hexl-hex-string-to-integer (read-string "Hex number: ")))) | |
698 | (if (or (> num 255) (< num 0)) | |
19e31f7c | 699 | (error "Hex number out of range") |
a2535589 JA |
700 | (hexl-insert-char num arg)))) |
701 | ||
9f6bff44 GM |
702 | (defun hexl-insert-hex-string (str arg) |
703 | "Insert hexadecimal string STR at point ARG times. | |
704 | Embedded whitespace, dashes, and periods in the string are ignored." | |
705 | (interactive "sHex string: \np") | |
706 | (setq str (replace-regexp-in-string "[- \t.]" "" str)) | |
707 | (let ((chars '())) | |
708 | (let ((len (length str)) | |
709 | (idx 0)) | |
710 | (if (eq (logand len 1) 1) | |
711 | (let ((num (hexl-hex-string-to-integer (substring str 0 1)))) | |
712 | (setq chars (cons num chars)) | |
713 | (setq idx 1))) | |
714 | (while (< idx len) | |
715 | (let* ((nidx (+ idx 2)) | |
716 | (num (hexl-hex-string-to-integer (substring str idx nidx)))) | |
717 | (setq chars (cons num chars)) | |
718 | (setq idx nidx)))) | |
719 | (setq chars (nreverse chars)) | |
720 | (while (> arg 0) | |
721 | (let ((chars chars)) | |
722 | (while chars | |
723 | (hexl-insert-char (car chars) 1) | |
724 | (setq chars (cdr chars)))) | |
725 | (setq arg (- arg 1))))) | |
726 | ||
a2535589 JA |
727 | (defun hexl-insert-decimal-char (arg) |
728 | "Insert a ASCII char ARG times at point for a given decimal number." | |
729 | (interactive "p") | |
730 | (let ((num (string-to-int (read-string "Decimal Number: ")))) | |
731 | (if (or (> num 255) (< num 0)) | |
19e31f7c | 732 | (error "Decimal number out of range") |
a2535589 JA |
733 | (hexl-insert-char num arg)))) |
734 | ||
735 | (defun hexl-insert-octal-char (arg) | |
736 | "Insert a ASCII char ARG times at point for a given octal number." | |
737 | (interactive "p") | |
738 | (let ((num (hexl-octal-string-to-integer (read-string "Octal Number: ")))) | |
739 | (if (or (> num 255) (< num 0)) | |
19e31f7c | 740 | (error "Decimal number out of range") |
a2535589 JA |
741 | (hexl-insert-char num arg)))) |
742 | ||
db6c5b92 SE |
743 | (defun hexl-follow-ascii (&optional arg) |
744 | "Toggle following ASCII in Hexl buffers. | |
745 | With prefix ARG, turn on following if and only if ARG is positive. | |
746 | When following is enabled, the ASCII character corresponding to the | |
747 | element under the point is highlighted. | |
748 | Customize the variable `hexl-follow-ascii' to disable this feature." | |
749 | (interactive "P") | |
750 | (let ((on-p (if arg | |
751 | (> (prefix-numeric-value arg) 0) | |
752 | (not hexl-ascii-overlay)))) | |
753 | ||
754 | (make-local-hook 'post-command-hook) | |
755 | ||
756 | (if on-p | |
757 | ;; turn it on | |
758 | (if (not hexl-ascii-overlay) | |
759 | (progn | |
760 | (setq hexl-ascii-overlay (make-overlay 1 1) | |
761 | hexl-follow-ascii t) | |
762 | (overlay-put hexl-ascii-overlay 'face 'highlight) | |
763 | (add-hook 'post-command-hook 'hexl-follow-ascii-find nil t))) | |
764 | ;; turn it off | |
765 | (if hexl-ascii-overlay | |
766 | (progn | |
767 | (delete-overlay hexl-ascii-overlay) | |
768 | (setq hexl-ascii-overlay nil | |
769 | hexl-follow-ascii nil) | |
770 | (remove-hook 'post-command-hook 'hexl-follow-ascii-find t) | |
771 | ))))) | |
772 | ||
773 | (defun hexl-follow-ascii-find () | |
774 | "Find and highlight the ASCII element corresponding to current point." | |
775 | (let ((pos (+ 51 | |
776 | (- (point) (current-column)) | |
777 | (mod (hexl-current-address) 16)))) | |
778 | (move-overlay hexl-ascii-overlay pos (1+ pos)) | |
779 | )) | |
780 | ||
a2535589 JA |
781 | ;; startup stuff. |
782 | ||
783 | (if hexl-mode-map | |
784 | nil | |
ae2d451b RS |
785 | (setq hexl-mode-map (make-sparse-keymap)) |
786 | ||
787 | (define-key hexl-mode-map [left] 'hexl-backward-char) | |
788 | (define-key hexl-mode-map [right] 'hexl-forward-char) | |
789 | (define-key hexl-mode-map [up] 'hexl-previous-line) | |
790 | (define-key hexl-mode-map [down] 'hexl-next-line) | |
791 | (define-key hexl-mode-map [M-left] 'hexl-backward-short) | |
792 | (define-key hexl-mode-map [M-right] 'hexl-forward-short) | |
793 | (define-key hexl-mode-map [next] 'hexl-scroll-up) | |
794 | (define-key hexl-mode-map [prior] 'hexl-scroll-down) | |
795 | (define-key hexl-mode-map [home] 'hexl-beginning-of-buffer) | |
796 | (define-key hexl-mode-map [deletechar] 'undefined) | |
797 | (define-key hexl-mode-map [deleteline] 'undefined) | |
798 | (define-key hexl-mode-map [insertline] 'undefined) | |
799 | (define-key hexl-mode-map [S-delete] 'undefined) | |
800 | (define-key hexl-mode-map "\177" 'undefined) | |
801 | ||
802 | (define-key hexl-mode-map "\C-a" 'hexl-beginning-of-line) | |
803 | (define-key hexl-mode-map "\C-b" 'hexl-backward-char) | |
804 | (define-key hexl-mode-map "\C-d" 'undefined) | |
805 | (define-key hexl-mode-map "\C-e" 'hexl-end-of-line) | |
806 | (define-key hexl-mode-map "\C-f" 'hexl-forward-char) | |
807 | ||
808 | (if (not (eq (key-binding (char-to-string help-char)) 'help-command)) | |
809 | (define-key hexl-mode-map (char-to-string help-char) 'undefined)) | |
810 | ||
811 | (define-key hexl-mode-map "\C-i" 'hexl-self-insert-command) | |
812 | (define-key hexl-mode-map "\C-j" 'hexl-self-insert-command) | |
813 | (define-key hexl-mode-map "\C-k" 'undefined) | |
814 | (define-key hexl-mode-map "\C-m" 'hexl-self-insert-command) | |
815 | (define-key hexl-mode-map "\C-n" 'hexl-next-line) | |
816 | (define-key hexl-mode-map "\C-o" 'undefined) | |
817 | (define-key hexl-mode-map "\C-p" 'hexl-previous-line) | |
818 | (define-key hexl-mode-map "\C-q" 'hexl-quoted-insert) | |
819 | (define-key hexl-mode-map "\C-t" 'undefined) | |
820 | (define-key hexl-mode-map "\C-v" 'hexl-scroll-up) | |
821 | (define-key hexl-mode-map "\C-w" 'undefined) | |
822 | (define-key hexl-mode-map "\C-y" 'undefined) | |
823 | ||
824 | (let ((ch 32)) | |
825 | (while (< ch 127) | |
826 | (define-key hexl-mode-map (format "%c" ch) 'hexl-self-insert-command) | |
827 | (setq ch (1+ ch)))) | |
828 | ||
829 | (define-key hexl-mode-map "\e\C-a" 'hexl-beginning-of-512b-page) | |
830 | (define-key hexl-mode-map "\e\C-b" 'hexl-backward-short) | |
ae2d451b RS |
831 | (define-key hexl-mode-map "\e\C-d" 'hexl-insert-decimal-char) |
832 | (define-key hexl-mode-map "\e\C-e" 'hexl-end-of-512b-page) | |
833 | (define-key hexl-mode-map "\e\C-f" 'hexl-forward-short) | |
ae2d451b RS |
834 | (define-key hexl-mode-map "\e\C-i" 'undefined) |
835 | (define-key hexl-mode-map "\e\C-j" 'undefined) | |
836 | (define-key hexl-mode-map "\e\C-k" 'undefined) | |
ae2d451b | 837 | (define-key hexl-mode-map "\e\C-o" 'hexl-insert-octal-char) |
ae2d451b | 838 | (define-key hexl-mode-map "\e\C-q" 'undefined) |
ae2d451b | 839 | (define-key hexl-mode-map "\e\C-t" 'undefined) |
ae2d451b | 840 | (define-key hexl-mode-map "\e\C-x" 'hexl-insert-hex-char) |
ae2d451b RS |
841 | (define-key hexl-mode-map "\eb" 'hexl-backward-word) |
842 | (define-key hexl-mode-map "\ec" 'undefined) | |
843 | (define-key hexl-mode-map "\ed" 'undefined) | |
ae2d451b RS |
844 | (define-key hexl-mode-map "\ef" 'hexl-forward-word) |
845 | (define-key hexl-mode-map "\eg" 'hexl-goto-hex-address) | |
ae2d451b RS |
846 | (define-key hexl-mode-map "\ei" 'undefined) |
847 | (define-key hexl-mode-map "\ej" 'hexl-goto-address) | |
848 | (define-key hexl-mode-map "\ek" 'undefined) | |
849 | (define-key hexl-mode-map "\el" 'undefined) | |
ae2d451b | 850 | (define-key hexl-mode-map "\eq" 'undefined) |
ae2d451b RS |
851 | (define-key hexl-mode-map "\es" 'undefined) |
852 | (define-key hexl-mode-map "\et" 'undefined) | |
853 | (define-key hexl-mode-map "\eu" 'undefined) | |
854 | (define-key hexl-mode-map "\ev" 'hexl-scroll-down) | |
855 | (define-key hexl-mode-map "\ey" 'undefined) | |
856 | (define-key hexl-mode-map "\ez" 'undefined) | |
857 | (define-key hexl-mode-map "\e<" 'hexl-beginning-of-buffer) | |
858 | (define-key hexl-mode-map "\e>" 'hexl-end-of-buffer) | |
859 | ||
860 | (define-key hexl-mode-map "\C-c\C-c" 'hexl-mode-exit) | |
861 | ||
862 | (define-key hexl-mode-map "\C-x[" 'hexl-beginning-of-1k-page) | |
863 | (define-key hexl-mode-map "\C-x]" 'hexl-end-of-1k-page) | |
864 | (define-key hexl-mode-map "\C-x\C-p" 'undefined) | |
865 | (define-key hexl-mode-map "\C-x\C-s" 'hexl-save-buffer) | |
866 | (define-key hexl-mode-map "\C-x\C-t" 'undefined)) | |
a2535589 | 867 | |
19e31f7c RS |
868 | (provide 'hexl) |
869 | ||
1a06eabd | 870 | ;;; hexl.el ends here |