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1 ;;; hexl.el --- edit a file in a hex dump format using the hexl filter.
2
3 ;; Copyright (C) 1989, 1994 Free Software Foundation, Inc.
4
5 ;; Author: Keith Gabryelski <ag@wheaties.ai.mit.edu>
6 ;; Maintainer: FSF
7 ;; Keywords: data
8
9 ;; This file is part of XEmacs.
10
11 ;; XEmacs is free software; you can redistribute it and/or modify it
12 ;; under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; any later version.
15
16 ;; XEmacs is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
20
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with XEmacs; see the file COPYING. If not, write to the Free
23 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24
25 ;;; Synched up with: FSF 19.30.
26
27 ;;; Commentary:
28
29 ;; This package implements a major mode for editing binary files. It uses
30 ;; a program called hexl, supplied with the GNU Emacs distribution, that
31 ;; can filter a binary into an editable format or from the format back into
32 ;; binary. For full instructions, invoke `hexl-mode' on an empty buffer and
33 ;; do `M-x describe-mode'.
34 ;;
35 ;; This may be useful in your .emacs:
36 ;;
37 ;; (autoload 'hexl-find-file "hexl"
38 ;; "Edit file FILENAME in hexl-mode." t)
39 ;;
40 ;; (define-key global-map "\C-c\C-h" 'hexl-find-file)
41 ;;
42 ;; NOTE: Remember to change HEXL-PROGRAM or HEXL-OPTIONS if needed.
43 ;;
44 ;; Currently hexl only supports big endian hex output with 16 bit
45 ;; grouping.
46 ;;
47 ;; -iso in `hexl-options' will allow iso characters to display in the
48 ;; ASCII region of the screen (if your emacs supports this) instead of
49 ;; changing them to dots.
50
51 ;;; Code:
52
53 ;;
54 ;; vars here
55 ;;
56
57 (defvar hexl-program "hexl"
58 "The program that will hexlify and de-hexlify its stdin.
59 `hexl-program' will always be concatenated with `hexl-options'
60 and \"-de\" when dehexlfying a buffer.")
61
62 (defvar hexl-iso ""
63 "If your emacs can handle ISO characters, this should be set to
64 \"-iso\" otherwise it should be \"\".")
65
66 (defvar hexl-options (format "-hex %s" hexl-iso)
67 "Options to hexl-program that suit your needs.")
68
69 (defvar hexlify-command
70 (format "%s%s %s" exec-directory hexl-program hexl-options)
71 "The command to use to hexlify a buffer.")
72
73 (defvar dehexlify-command
74 (format "%s%s -de %s" exec-directory hexl-program hexl-options)
75 "The command to use to unhexlify a buffer.")
76
77 (defvar hexl-max-address 0
78 "Maximum offset into hexl buffer.")
79
80 (defvar hexl-mode-map nil)
81
82 (defvar hexl-mode-old-local-map)
83 (defvar hexl-mode-old-mode-name)
84 (defvar hexl-mode-old-major-mode)
85
86 ;; routines
87
88 (defvar hexl-mode-old-local-map)
89 (defvar hexl-mode-old-mode-name)
90 (defvar hexl-mode-old-major-mode)
91
92 ;;;###autoload
93 (defun hexl-mode (&optional arg)
94 "\\<hexl-mode-map>
95 A major mode for editing binary files in hex dump format.
96
97 This function automatically converts a buffer into the hexl format
98 using the function `hexlify-buffer'.
99
100 Each line in the buffer has an \"address\" (displayed in hexadecimal)
101 representing the offset into the file that the characters on this line
102 are at and 16 characters from the file (displayed as hexadecimal
103 values grouped every 16 bits) and as their ASCII values.
104
105 If any of the characters (displayed as ASCII characters) are
106 unprintable (control or meta characters) they will be replaced as
107 periods.
108
109 If `hexl-mode' is invoked with an argument the buffer is assumed to be
110 in hexl format.
111
112 A sample format:
113
114 HEX ADDR: 0001 0203 0405 0607 0809 0a0b 0c0d 0e0f ASCII-TEXT
115 -------- ---- ---- ---- ---- ---- ---- ---- ---- ----------------
116 00000000: 5468 6973 2069 7320 6865 786c 2d6d 6f64 This is hexl-mod
117 00000010: 652e 2020 4561 6368 206c 696e 6520 7265 e. Each line re
118 00000020: 7072 6573 656e 7473 2031 3620 6279 7465 presents 16 byte
119 00000030: 7320 6173 2068 6578 6164 6563 696d 616c s as hexadecimal
120 00000040: 2041 5343 4949 0a61 6e64 2070 7269 6e74 ASCII.and print
121 00000050: 6162 6c65 2041 5343 4949 2063 6861 7261 able ASCII chara
122 00000060: 6374 6572 732e 2020 416e 7920 636f 6e74 cters. Any cont
123 00000070: 726f 6c20 6f72 206e 6f6e 2d41 5343 4949 rol or non-ASCII
124 00000080: 2063 6861 7261 6374 6572 730a 6172 6520 characters.are
125 00000090: 6469 7370 6c61 7965 6420 6173 2070 6572 displayed as per
126 000000a0: 696f 6473 2069 6e20 7468 6520 7072 696e iods in the prin
127 000000b0: 7461 626c 6520 6368 6172 6163 7465 7220 table character
128 000000c0: 7265 6769 6f6e 2e0a region..
129
130 Movement is as simple as movement in a normal emacs text buffer. Most
131 cursor movement bindings are the same (ie. Use \\[hexl-backward-char], \\[hexl-forward-char], \\[hexl-next-line], and \\[hexl-previous-line]
132 to move the cursor left, right, down, and up).
133
134 Advanced cursor movement commands (ala \\[hexl-beginning-of-line], \\[hexl-end-of-line], \\[hexl-beginning-of-buffer], and \\[hexl-end-of-buffer]) are
135 also supported.
136
137 There are several ways to change text in hexl mode:
138
139 ASCII characters (character between space (0x20) and tilde (0x7E)) are
140 bound to self-insert so you can simply type the character and it will
141 insert itself (actually overstrike) into the buffer.
142
143 \\[hexl-quoted-insert] followed by another keystroke allows you to insert the key even if
144 it isn't bound to self-insert. An octal number can be supplied in place
145 of another key to insert the octal number's ASCII representation.
146
147 \\[hexl-insert-hex-char] will insert a given hexadecimal value (if it is between 0 and 0xFF)
148 into the buffer at the current point.
149
150 \\[hexl-insert-octal-char] will insert a given octal value (if it is between 0 and 0377)
151 into the buffer at the current point.
152
153 \\[hexl-insert-decimal-char] will insert a given decimal value (if it is between 0 and 255)
154 into the buffer at the current point.
155
156 \\[hexl-mode-exit] will exit hexl-mode.
157
158 Note: saving the file with any of the usual Emacs commands
159 will actually convert it back to binary format while saving.
160
161 You can use \\[hexl-find-file] to visit a file in hexl-mode.
162
163 \\[describe-bindings] for advanced commands."
164 (interactive "p")
165 (if (eq major-mode 'hexl-mode)
166 (error "You are already in hexl mode.")
167 (kill-all-local-variables)
168 (make-local-variable 'hexl-mode-old-local-map)
169 (setq hexl-mode-old-local-map (current-local-map))
170 (use-local-map hexl-mode-map)
171
172 (make-local-variable 'hexl-mode-old-mode-name)
173 (setq hexl-mode-old-mode-name mode-name)
174 (setq mode-name "Hexl")
175
176 (make-local-variable 'hexl-mode-old-major-mode)
177 (setq hexl-mode-old-major-mode major-mode)
178 (setq major-mode 'hexl-mode)
179
180 (make-local-variable 'write-contents-hooks)
181 (add-hook 'write-contents-hooks 'hexl-save-buffer)
182
183 (make-local-hook 'after-revert-hook)
184 (add-hook 'after-revert-hook 'hexl-after-revert-hook nil t)
185
186 (make-local-variable 'hexl-max-address)
187
188 (make-local-variable 'change-major-mode-hook)
189 (add-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer)
190
191 (make-local-variable 'require-final-newline)
192 (setq require-final-newline nil)
193
194 (let ((modified (buffer-modified-p))
195 (inhibit-read-only t)
196 (original-point (1- (point))))
197 (and (eobp) (not (bobp))
198 (setq original-point (1- original-point)))
199 (if (not (or (eq arg 1) (not arg)))
200 ;; if no argument then we guess at hexl-max-address
201 (setq hexl-max-address (+ (* (/ (1- (buffer-size)) 68) 16) 15))
202 (setq hexl-max-address (1- (buffer-size)))
203 (hexlify-buffer)
204 (set-buffer-modified-p modified)
205 (hexl-goto-address original-point)))))
206
207 (defun hexl-after-revert-hook ()
208 (hexlify-buffer)
209 (set-buffer-modified-p nil))
210
211 (defvar hexl-in-save-buffer nil)
212
213 (defun hexl-save-buffer ()
214 "Save a hexl format buffer as binary in visited file if modified."
215 (interactive)
216 (if hexl-in-save-buffer nil
217 (set-buffer-modified-p (if (buffer-modified-p)
218 (save-excursion
219 (let ((buf (generate-new-buffer " hexl"))
220 (name (buffer-name))
221 (file-name (buffer-file-name))
222 (start (point-min))
223 (end (point-max))
224 modified)
225 (set-buffer buf)
226 (insert-buffer-substring name start end)
227 (set-buffer name)
228 (dehexlify-buffer)
229 ;; Prevent infinite recursion.
230 (let ((hexl-in-save-buffer t)
231 (buffer-file-type t)) ; for ms-dos
232 (save-buffer))
233 (setq modified (buffer-modified-p))
234 (delete-region (point-min) (point-max))
235 (insert-buffer-substring buf start end)
236 (kill-buffer buf)
237 modified))
238 (message "(No changes need to be saved)")
239 nil))
240 ;; Return t to indicate we have saved t
241 t))
242
243 ;;;###autoload
244 (defun hexl-find-file (filename)
245 "Edit file FILENAME in hexl-mode.
246 Switch to a buffer visiting file FILENAME, creating one in none exists."
247 (interactive "fFilename: ")
248 (if (or (eq system-type 'ms-dos) (eq system-type 'windows-nt))
249 (find-file-binary filename)
250 (find-file filename))
251 (if (not (eq major-mode 'hexl-mode))
252 (hexl-mode)))
253
254 (defun hexl-mode-exit (&optional arg)
255 "Exit Hexl mode, returning to previous mode.
256 With arg, don't unhexlify buffer."
257 (interactive "p")
258 (if (or (eq arg 1) (not arg))
259 (let ((modified (buffer-modified-p))
260 (inhibit-read-only t)
261 (original-point (1+ (hexl-current-address))))
262 (dehexlify-buffer)
263 (remove-hook 'write-contents-hooks 'hexl-save-buffer)
264 (set-buffer-modified-p modified)
265 (goto-char original-point)))
266 (setq mode-name hexl-mode-old-mode-name)
267 (use-local-map hexl-mode-old-local-map)
268 (setq major-mode hexl-mode-old-major-mode)
269 (force-mode-line-update))
270
271 (defun hexl-maybe-dehexlify-buffer ()
272 "Convert a hexl format buffer to binary.
273 Ask the user for confirmation."
274 (if (y-or-n-p "Convert contents back to binary format? ")
275 (let ((modified (buffer-modified-p))
276 (inhibit-read-only t)
277 (original-point (1+ (hexl-current-address))))
278 (dehexlify-buffer)
279 (remove-hook 'write-contents-hooks 'hexl-save-buffer)
280 (set-buffer-modified-p modified)
281 (goto-char original-point))))
282
283 (defun hexl-current-address (&optional validate)
284 "Return current hexl-address."
285 (interactive)
286 (let ((current-column (- (% (point) 68) 11))
287 (hexl-address 0))
288 (if (< current-column 0)
289 (if validate
290 (error "Point is not on a character in the file")
291 (setq current-column 0)))
292 (setq hexl-address
293 (+ (* (/ (point) 68) 16)
294 (if (>= current-column 41)
295 (- current-column 41)
296 (/ (- current-column (/ current-column 5)) 2))))
297 hexl-address))
298
299 (defun hexl-address-to-marker (address)
300 "Return marker for ADDRESS."
301 (interactive "nAddress: ")
302 (+ (* (/ address 16) 68) 11 (/ (* (% address 16) 5) 2)))
303
304 (defun hexl-goto-address (address)
305 "Goto hexl-mode (decimal) address ADDRESS.
306 Signal error if ADDRESS out of range."
307 (interactive "nAddress: ")
308 (if (or (< address 0) (> address hexl-max-address))
309 (error "Out of hexl region."))
310 (goto-char (hexl-address-to-marker address)))
311
312 (defun hexl-goto-hex-address (hex-address)
313 "Go to hexl-mode address (hex string) HEX-ADDRESS.
314 Signal error if HEX-ADDRESS is out of range."
315 (interactive "sHex Address: ")
316 (hexl-goto-address (hexl-hex-string-to-integer hex-address)))
317
318 (defun hexl-hex-string-to-integer (hex-string)
319 "Return decimal integer for HEX-STRING."
320 (interactive "sHex number: ")
321 (let ((hex-num 0))
322 (while (not (equal hex-string ""))
323 (setq hex-num (+ (* hex-num 16)
324 (hexl-hex-char-to-integer (string-to-char hex-string))))
325 (setq hex-string (substring hex-string 1)))
326 hex-num))
327
328 (defun hexl-octal-string-to-integer (octal-string)
329 "Return decimal integer for OCTAL-STRING."
330 (interactive "sOctal number: ")
331 (let ((oct-num 0))
332 (while (not (equal octal-string ""))
333 (setq oct-num (+ (* oct-num 8)
334 (hexl-oct-char-to-integer
335 (string-to-char octal-string))))
336 (setq octal-string (substring octal-string 1)))
337 oct-num))
338
339 ;; move point functions
340
341 (defun hexl-backward-char (arg)
342 "Move to left ARG bytes (right if ARG negative) in hexl-mode."
343 (interactive "p")
344 (hexl-goto-address (- (hexl-current-address) arg)))
345
346 (defun hexl-forward-char (arg)
347 "Move right ARG bytes (left if ARG negative) in hexl-mode."
348 (interactive "p")
349 (hexl-goto-address (+ (hexl-current-address) arg)))
350
351 (defun hexl-backward-short (arg)
352 "Move to left ARG shorts (right if ARG negative) in hexl-mode."
353 (interactive "p")
354 (hexl-goto-address (let ((address (hexl-current-address)))
355 (if (< arg 0)
356 (progn
357 (setq arg (- arg))
358 (while (> arg 0)
359 (if (not (equal address (logior address 3)))
360 (if (> address hexl-max-address)
361 (progn
362 (message "End of buffer.")
363 (setq address hexl-max-address))
364 (setq address (logior address 3)))
365 (if (> address hexl-max-address)
366 (progn
367 (message "End of buffer.")
368 (setq address hexl-max-address))
369 (setq address (+ address 4))))
370 (setq arg (1- arg)))
371 (if (> address hexl-max-address)
372 (progn
373 (message "End of buffer.")
374 (setq address hexl-max-address))
375 (setq address (logior address 3))))
376 (while (> arg 0)
377 (if (not (equal address (logand address -4)))
378 (setq address (logand address -4))
379 (if (not (equal address 0))
380 (setq address (- address 4))
381 (message "Beginning of buffer.")))
382 (setq arg (1- arg))))
383 address)))
384
385 (defun hexl-forward-short (arg)
386 "Move right ARG shorts (left if ARG negative) in hexl-mode."
387 (interactive "p")
388 (hexl-backward-short (- arg)))
389
390 (defun hexl-backward-word (arg)
391 "Move to left ARG words (right if ARG negative) in hexl-mode."
392 (interactive "p")
393 (hexl-goto-address (let ((address (hexl-current-address)))
394 (if (< arg 0)
395 (progn
396 (setq arg (- arg))
397 (while (> arg 0)
398 (if (not (equal address (logior address 7)))
399 (if (> address hexl-max-address)
400 (progn
401 (message "End of buffer.")
402 (setq address hexl-max-address))
403 (setq address (logior address 7)))
404 (if (> address hexl-max-address)
405 (progn
406 (message "End of buffer.")
407 (setq address hexl-max-address))
408 (setq address (+ address 8))))
409 (setq arg (1- arg)))
410 (if (> address hexl-max-address)
411 (progn
412 (message "End of buffer.")
413 (setq address hexl-max-address))
414 (setq address (logior address 7))))
415 (while (> arg 0)
416 (if (not (equal address (logand address -8)))
417 (setq address (logand address -8))
418 (if (not (equal address 0))
419 (setq address (- address 8))
420 (message "Beginning of buffer.")))
421 (setq arg (1- arg))))
422 address)))
423
424 (defun hexl-forward-word (arg)
425 "Move right ARG words (left if ARG negative) in hexl-mode."
426 (interactive "p")
427 (hexl-backward-word (- arg)))
428
429 (defun hexl-previous-line (arg)
430 "Move vertically up ARG lines [16 bytes] (down if ARG negative) in hexl-mode.
431 If there is byte at the target address move to the last byte in that line."
432 (interactive "p")
433 (hexl-next-line (- arg)))
434
435 (defun hexl-next-line (arg)
436 "Move vertically down ARG lines [16 bytes] (up if ARG negative) in hexl-mode.
437 If there is no byte at the target address move to the last byte in that line."
438 (interactive "p")
439 (hexl-goto-address (let ((address (+ (hexl-current-address) (* arg 16))))
440 (if (and (< arg 0) (< address 0))
441 (progn (message "Out of hexl region.")
442 (setq address
443 (% (hexl-current-address) 16)))
444 (if (and (> address hexl-max-address)
445 (< (% hexl-max-address 16) (% address 16)))
446 (setq address hexl-max-address)
447 (if (> address hexl-max-address)
448 (progn (message "Out of hexl region.")
449 (setq
450 address
451 (+ (logand hexl-max-address -16)
452 (% (hexl-current-address) 16)))))))
453 address)))
454
455 (defun hexl-beginning-of-buffer (arg)
456 "Move to the beginning of the hexl buffer.
457 Leaves `hexl-mark' at previous position.
458 With prefix arg N, puts point N bytes of the way from the true beginning."
459 (interactive "p")
460 (push-mark (point))
461 (hexl-goto-address (+ 0 (1- arg))))
462
463 (defun hexl-end-of-buffer (arg)
464 "Go to `hexl-max-address' minus ARG."
465 (interactive "p")
466 (push-mark (point))
467 (hexl-goto-address (- hexl-max-address (1- arg))))
468
469 (defun hexl-beginning-of-line ()
470 "Goto beginning of line in hexl mode."
471 (interactive)
472 (goto-char (+ (* (/ (point) 68) 68) 11)))
473
474 (defun hexl-end-of-line ()
475 "Goto end of line in hexl mode."
476 (interactive)
477 (hexl-goto-address (let ((address (logior (hexl-current-address) 15)))
478 (if (> address hexl-max-address)
479 (setq address hexl-max-address))
480 address)))
481
482 (defun hexl-scroll-down (arg)
483 "Scroll hexl buffer window upward ARG lines; or near full window if no ARG."
484 (interactive "P")
485 (if (null arg)
486 (setq arg (1- (window-height)))
487 (setq arg (prefix-numeric-value arg)))
488 (hexl-scroll-up (- arg)))
489
490 (defun hexl-scroll-up (arg)
491 "Scroll hexl buffer window upward ARG lines; or near full window if no ARG."
492 (interactive "P")
493 (if (null arg)
494 (setq arg (1- (window-height)))
495 (setq arg (prefix-numeric-value arg)))
496 (let ((movement (* arg 16))
497 (address (hexl-current-address)))
498 (if (or (> (+ address movement) hexl-max-address)
499 (< (+ address movement) 0))
500 (message "Out of hexl region.")
501 (hexl-goto-address (+ address movement))
502 (recenter 0))))
503
504 (defun hexl-beginning-of-1k-page ()
505 "Goto to beginning of 1k boundry."
506 (interactive)
507 (hexl-goto-address (logand (hexl-current-address) -1024)))
508
509 (defun hexl-end-of-1k-page ()
510 "Goto to end of 1k boundry."
511 (interactive)
512 (hexl-goto-address (let ((address (logior (hexl-current-address) 1023)))
513 (if (> address hexl-max-address)
514 (setq address hexl-max-address))
515 address)))
516
517 (defun hexl-beginning-of-512b-page ()
518 "Goto to beginning of 512 byte boundry."
519 (interactive)
520 (hexl-goto-address (logand (hexl-current-address) -512)))
521
522 (defun hexl-end-of-512b-page ()
523 "Goto to end of 512 byte boundry."
524 (interactive)
525 (hexl-goto-address (let ((address (logior (hexl-current-address) 511)))
526 (if (> address hexl-max-address)
527 (setq address hexl-max-address))
528 address)))
529
530 (defun hexl-quoted-insert (arg)
531 "Read next input character and insert it.
532 Useful for inserting control characters.
533 You may also type up to 3 octal digits, to insert a character with that code"
534 (interactive "p")
535 (hexl-insert-char (read-quoted-char) arg))
536
537 ;00000000: 0011 2233 4455 6677 8899 aabb ccdd eeff 0123456789ABCDEF
538
539 (defun hexlify-buffer ()
540 "Convert a binary buffer to hexl format."
541 (interactive)
542 (let ((binary-process-output nil) ; for Ms-Dos
543 (binary-process-input t))
544 (shell-command-on-region (point-min) (point-max) hexlify-command t)))
545
546 (defun dehexlify-buffer ()
547 "Convert a hexl format buffer to binary."
548 (interactive)
549 (let ((binary-process-output t) ; for Ms-Dos
550 (binary-process-input nil))
551 (shell-command-on-region (point-min) (point-max) dehexlify-command t)))
552
553 (defun hexl-char-after-point ()
554 "Return char for ASCII hex digits at point."
555 (hexl-htoi (char-after (point))
556 (char-after (1+ (point)))))
557
558 (defun hexl-htoi (lh rh)
559 "Hex (char) LH (char) RH to integer."
560 (+ (* (hexl-hex-char-to-integer lh) 16)
561 (hexl-hex-char-to-integer rh)))
562
563 (defun hexl-hex-char-to-integer (character)
564 "Take a char and return its value as if it was a hex digit."
565 (if (and (>= character ?0) (<= character ?9))
566 (- character ?0)
567 (let ((ch (logior character 32)))
568 (if (and (>= ch ?a) (<= ch ?f))
569 (- ch (- ?a 10))
570 (error (format "Invalid hex digit `%c'." ch))))))
571
572 (defun hexl-oct-char-to-integer (character)
573 "Take a char and return its value as if it was a octal digit."
574 (if (and (>= character ?0) (<= character ?7))
575 (- character ?0)
576 (error (format "Invalid octal digit `%c'." character))))
577
578 (defun hexl-printable-character (ch)
579 "Return a displayable string for character CH."
580 (format "%c" (if hexl-iso
581 (if (or (< ch 32) (and (>= ch 127) (< ch 160)))
582 46
583 ch)
584 (if (or (< ch 32) (>= ch 127))
585 46
586 ch))))
587
588 (defun hexl-self-insert-command (arg)
589 "Insert this character."
590 (interactive "p")
591 (hexl-insert-char last-command-char arg))
592
593 (defun hexl-insert-char (ch num)
594 "Insert a character in a hexl buffer."
595 (let ((address (hexl-current-address t)))
596 (while (> num 0)
597 (let ((hex-position
598 (+ (* (/ address 16) 68)
599 11
600 (* 2 (% address 16))
601 (/ (% address 16) 2)))
602 (ascii-position
603 (+ (* (/ address 16) 68) 52 (% address 16)))
604 at-ascii-position)
605 (if (= (point) ascii-position)
606 (setq at-ascii-position t))
607 (goto-char hex-position)
608 (delete-char 2)
609 (insert (format "%02x" ch))
610 (goto-char ascii-position)
611 (delete-char 1)
612 (insert (hexl-printable-character ch))
613 (or (eq address hexl-max-address)
614 (setq address (1+ address)))
615 (hexl-goto-address address)
616 (if at-ascii-position
617 (progn
618 (beginning-of-line)
619 (forward-char 51)
620 (forward-char (% address 16)))))
621 (setq num (1- num)))))
622
623 ;; hex conversion
624
625 (defun hexl-insert-hex-char (arg)
626 "Insert a ASCII char ARG times at point for a given hexadecimal number."
627 (interactive "p")
628 (let ((num (hexl-hex-string-to-integer (read-string "Hex number: "))))
629 (if (or (> num 255) (< num 0))
630 (error "Hex number out of range.")
631 (hexl-insert-char num arg))))
632
633 (defun hexl-insert-decimal-char (arg)
634 "Insert a ASCII char ARG times at point for a given decimal number."
635 (interactive "p")
636 (let ((num (string-to-int (read-string "Decimal Number: "))))
637 (if (or (> num 255) (< num 0))
638 (error "Decimal number out of range.")
639 (hexl-insert-char num arg))))
640
641 (defun hexl-insert-octal-char (arg)
642 "Insert a ASCII char ARG times at point for a given octal number."
643 (interactive "p")
644 (let ((num (hexl-octal-string-to-integer (read-string "Octal Number: "))))
645 (if (or (> num 255) (< num 0))
646 (error "Decimal number out of range.")
647 (hexl-insert-char num arg))))
648
649 ;; startup stuff.
650
651 (if hexl-mode-map
652 nil
653 (setq hexl-mode-map (make-sparse-keymap))
654 (set-keymap-name hexl-mode-map 'hexl-mode-map)
655
656 (define-key hexl-mode-map 'left 'hexl-backward-char)
657 (define-key hexl-mode-map 'right 'hexl-forward-char)
658 (define-key hexl-mode-map 'up 'hexl-previous-line)
659 (define-key hexl-mode-map 'down 'hexl-next-line)
660 (define-key hexl-mode-map '(meta left) 'hexl-backward-short)
661 (define-key hexl-mode-map '(meta right) 'hexl-forward-short)
662 (define-key hexl-mode-map 'next 'hexl-scroll-up)
663 (define-key hexl-mode-map 'prior 'hexl-scroll-down)
664
665 (define-key hexl-mode-map "\C-a" 'hexl-beginning-of-line)
666 (define-key hexl-mode-map "\C-b" 'hexl-backward-char)
667 (define-key hexl-mode-map "\C-d" 'undefined)
668 (define-key hexl-mode-map "\C-e" 'hexl-end-of-line)
669 (define-key hexl-mode-map "\C-f" 'hexl-forward-char)
670
671 (if (not (eq (key-binding (char-to-string help-char)) 'help-command))
672 (define-key hexl-mode-map (char-to-string help-char) 'undefined))
673
674 (define-key hexl-mode-map "\C-i" 'hexl-self-insert-command)
675 (define-key hexl-mode-map "\C-j" 'hexl-self-insert-command)
676 (define-key hexl-mode-map "\C-k" 'undefined)
677 (define-key hexl-mode-map "\C-m" 'hexl-self-insert-command)
678 (define-key hexl-mode-map "\C-n" 'hexl-next-line)
679 (define-key hexl-mode-map "\C-o" 'undefined)
680 (define-key hexl-mode-map "\C-p" 'hexl-previous-line)
681 (define-key hexl-mode-map "\C-q" 'hexl-quoted-insert)
682 (define-key hexl-mode-map "\C-t" 'undefined)
683 (define-key hexl-mode-map "\C-v" 'hexl-scroll-up)
684 (define-key hexl-mode-map "\C-w" 'undefined)
685 (define-key hexl-mode-map "\C-y" 'undefined)
686
687 (let ((ch 32))
688 (while (< ch 127)
689 (define-key hexl-mode-map (char-to-string ch) 'hexl-self-insert-command)
690 (setq ch (1+ ch))))
691
692 (define-key hexl-mode-map "\e\C-a" 'hexl-beginning-of-512b-page)
693 (define-key hexl-mode-map "\e\C-b" 'hexl-backward-short)
694 (define-key hexl-mode-map "\e\C-c" 'undefined)
695 (define-key hexl-mode-map "\e\C-d" 'hexl-insert-decimal-char)
696 (define-key hexl-mode-map "\e\C-e" 'hexl-end-of-512b-page)
697 (define-key hexl-mode-map "\e\C-f" 'hexl-forward-short)
698 (define-key hexl-mode-map "\e\C-g" 'undefined)
699 (define-key hexl-mode-map "\e\C-h" 'undefined)
700 (define-key hexl-mode-map "\e\C-i" 'undefined)
701 (define-key hexl-mode-map "\e\C-j" 'undefined)
702 (define-key hexl-mode-map "\e\C-k" 'undefined)
703 (define-key hexl-mode-map "\e\C-l" 'undefined)
704 (define-key hexl-mode-map "\e\C-m" 'undefined)
705 (define-key hexl-mode-map "\e\C-n" 'undefined)
706 (define-key hexl-mode-map "\e\C-o" 'hexl-insert-octal-char)
707 (define-key hexl-mode-map "\e\C-p" 'undefined)
708 (define-key hexl-mode-map "\e\C-q" 'undefined)
709 (define-key hexl-mode-map "\e\C-r" 'undefined)
710 (define-key hexl-mode-map "\e\C-s" 'undefined)
711 (define-key hexl-mode-map "\e\C-t" 'undefined)
712 (define-key hexl-mode-map "\e\C-u" 'undefined)
713
714 (define-key hexl-mode-map "\e\C-w" 'undefined)
715 (define-key hexl-mode-map "\e\C-x" 'hexl-insert-hex-char)
716 (define-key hexl-mode-map "\e\C-y" 'undefined)
717
718 (define-key hexl-mode-map "\ea" 'undefined) ;hexl-beginning-of-1k-page
719 (define-key hexl-mode-map "\eb" 'hexl-backward-word)
720 (define-key hexl-mode-map "\ec" 'undefined)
721 (define-key hexl-mode-map "\ed" 'undefined)
722 (define-key hexl-mode-map "\ee" 'undefined) ;hexl-end-of-1k-page
723 (define-key hexl-mode-map "\ef" 'hexl-forward-word)
724 (define-key hexl-mode-map "\eg" 'hexl-goto-hex-address)
725 (define-key hexl-mode-map "\eh" 'undefined)
726 (define-key hexl-mode-map "\ei" 'undefined)
727 (define-key hexl-mode-map "\ej" 'hexl-goto-address)
728 (define-key hexl-mode-map "\ek" 'undefined)
729 (define-key hexl-mode-map "\el" 'undefined)
730 (define-key hexl-mode-map "\em" 'undefined)
731 (define-key hexl-mode-map "\en" 'undefined)
732 (define-key hexl-mode-map "\eo" 'undefined)
733 (define-key hexl-mode-map "\ep" 'undefined)
734 (define-key hexl-mode-map "\eq" 'undefined)
735 (define-key hexl-mode-map "\er" 'undefined)
736 (define-key hexl-mode-map "\es" 'undefined)
737 (define-key hexl-mode-map "\et" 'undefined)
738 (define-key hexl-mode-map "\eu" 'undefined)
739 (define-key hexl-mode-map "\ev" 'hexl-scroll-down)
740 (define-key hexl-mode-map "\ey" 'undefined)
741 (define-key hexl-mode-map "\ez" 'undefined)
742 (define-key hexl-mode-map "\e<" 'hexl-beginning-of-buffer)
743 (define-key hexl-mode-map "\e>" 'hexl-end-of-buffer)
744
745 (define-key hexl-mode-map "\C-c\C-c" 'hexl-mode-exit)
746
747 (define-key hexl-mode-map "\C-x[" 'hexl-beginning-of-1k-page)
748 (define-key hexl-mode-map "\C-x]" 'hexl-end-of-1k-page)
749 (define-key hexl-mode-map "\C-x\C-p" 'undefined)
750 (define-key hexl-mode-map "\C-x\C-s" 'hexl-save-buffer)
751 (define-key hexl-mode-map "\C-x\C-t" 'undefined))
752
753 ;;; hexl.el ends here