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[bpt/emacs.git] / lisp / hexl.el
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a22f4c7d 1;;; hexl.el --- edit a file in a hex dump format using the hexl filter.
e5167999 2
8f1204db 3;; Copyright (C) 1989, 1994 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
22;; along with GNU Emacs; see the file COPYING. If not, write to
23;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24
e5167999
ER		 25;;; Commentary:
26
e41b2db1
ER		 27;; This package implements a major mode for editing binary files. It uses
28;; a program called hexl, supplied with the GNU Emacs distribution, that
29;; can filter a binary into an editable format or from the format back into
30;; binary. For full instructions, invoke `hexl-mode' on an empty buffer and
31;; do `M-x describe-mode'.
32;;
a2535589
JA		 33;; This may be useful in your .emacs:
34;;
35;; (autoload 'hexl-find-file "hexl"
36;; "Edit file FILENAME in hexl-mode." t)
37;;
38;; (define-key global-map "\C-c\C-h" 'hexl-find-file)
39;;
40;; NOTE: Remember to change HEXL-PROGRAM or HEXL-OPTIONS if needed.
41;;
42;; Currently hexl only supports big endian hex output with 16 bit
43;; grouping.
44;;
45;; -iso in `hexl-options' will allow iso characters to display in the
46;; ASCII region of the screen (if your emacs supports this) instead of
47;; changing them to dots.
48
e5167999
ER		 49;;; Code:
50
a2535589
JA		 51;;
52;; vars here
53;;
54
55(defvar hexl-program "hexl"
8a1281b5 56 "The program that will hexlify and de-hexlify its stdin.
57f07931 57`hexl-program' will always be concatenated with `hexl-options'
8a1281b5 58and \"-de\" when dehexlfying a buffer.")
a2535589
JA		 59
60(defvar hexl-iso ""
61 "If your emacs can handle ISO characters, this should be set to
62\"-iso\" otherwise it should be \"\".")
63
64(defvar hexl-options (format "-hex %s" hexl-iso)
65 "Options to hexl-program that suit your needs.")
66
a22f4c7d
RS		 67(defvar hexlify-command
68 (format "%s%s %s" exec-directory hexl-program hexl-options)
57f07931 69 "The command to use to hexlify a buffer.")
a2535589 70
a22f4c7d
RS		 71(defvar dehexlify-command
72 (format "%s%s -de %s" exec-directory hexl-program hexl-options)
57f07931 73 "The command to use to unhexlify a buffer.")
a2535589
JA		 74
75(defvar hexl-max-address 0
76 "Maximum offset into hexl buffer.")
77
78(defvar hexl-mode-map nil)
79
f39c6650
RS		 80(defvar hexl-mode-old-local-map)
81(defvar hexl-mode-old-mode-name)
82(defvar hexl-mode-old-major-mode)
83
a2535589
JA		 84;; routines
85
31c75fa7 86;;;###autoload
a2535589
JA		 87(defun hexl-mode (&optional arg)
88 "\\<hexl-mode-map>
e41b2db1 89A major mode for editing binary files in hex dump format.
a2535589
JA		 90
91This function automatically converts a buffer into the hexl format
92using the function `hexlify-buffer'.
93
8a1281b5 94Each line in the buffer has an \"address\" (displayed in hexadecimal)
a2535589
JA		 95representing the offset into the file that the characters on this line
96are at and 16 characters from the file (displayed as hexadecimal
97values grouped every 16 bits) and as their ASCII values.
98
99If any of the characters (displayed as ASCII characters) are
100unprintable (control or meta characters) they will be replaced as
101periods.
102
8a1281b5
RS		 103If `hexl-mode' is invoked with an argument the buffer is assumed to be
104in hexl format.
a2535589
JA		 105
106A sample format:
107
108 HEX ADDR: 0001 0203 0405 0607 0809 0a0b 0c0d 0e0f ASCII-TEXT
109 -------- ---- ---- ---- ---- ---- ---- ---- ---- ----------------
110 00000000: 5468 6973 2069 7320 6865 786c 2d6d 6f64 This is hexl-mod
111 00000010: 652e 2020 4561 6368 206c 696e 6520 7265 e. Each line re
112 00000020: 7072 6573 656e 7473 2031 3620 6279 7465 presents 16 byte
113 00000030: 7320 6173 2068 6578 6164 6563 696d 616c s as hexadecimal
114 00000040: 2041 5343 4949 0a61 6e64 2070 7269 6e74 ASCII.and print
115 00000050: 6162 6c65 2041 5343 4949 2063 6861 7261 able ASCII chara
116 00000060: 6374 6572 732e 2020 416e 7920 636f 6e74 cters. Any cont
117 00000070: 726f 6c20 6f72 206e 6f6e 2d41 5343 4949 rol or non-ASCII
118 00000080: 2063 6861 7261 6374 6572 730a 6172 6520 characters.are
119 00000090: 6469 7370 6c61 7965 6420 6173 2070 6572 displayed as per
120 000000a0: 696f 6473 2069 6e20 7468 6520 7072 696e iods in the prin
121 000000b0: 7461 626c 6520 6368 6172 6163 7465 7220 table character
122 000000c0: 7265 6769 6f6e 2e0a region..
123
124Movement is as simple as movement in a normal emacs text buffer. Most
125cursor movement bindings are the same (ie. Use \\[hexl-backward-char], \\[hexl-forward-char], \\[hexl-next-line], and \\[hexl-previous-line]
126to move the cursor left, right, down, and up).
127
128Advanced cursor movement commands (ala \\[hexl-beginning-of-line], \\[hexl-end-of-line], \\[hexl-beginning-of-buffer], and \\[hexl-end-of-buffer]) are
129also supported.
130
131There are several ways to change text in hexl mode:
132
133ASCII characters (character between space (0x20) and tilde (0x7E)) are
134bound to self-insert so you can simply type the character and it will
135insert itself (actually overstrike) into the buffer.
136
137\\[hexl-quoted-insert] followed by another keystroke allows you to insert the key even if
138it isn't bound to self-insert. An octal number can be supplied in place
139of another key to insert the octal number's ASCII representation.
140
141\\[hexl-insert-hex-char] will insert a given hexadecimal value (if it is between 0 and 0xFF)
142into the buffer at the current point.
143
144\\[hexl-insert-octal-char] will insert a given octal value (if it is between 0 and 0377)
145into the buffer at the current point.
146
147\\[hexl-insert-decimal-char] will insert a given decimal value (if it is between 0 and 255)
148into the buffer at the current point.
149
a2535589
JA		 150\\[hexl-mode-exit] will exit hexl-mode.
151
31c75fa7
RS		 152Note: saving the file with any of the usual Emacs commands
153will actually convert it back to binary format while saving.
a2535589
JA		 154
155You can use \\[hexl-find-file] to visit a file in hexl-mode.
156
157\\[describe-bindings] for advanced commands."
158 (interactive "p")
159 (if (eq major-mode 'hexl-mode)
160 (error "You are already in hexl mode.")
161 (kill-all-local-variables)
162 (make-local-variable 'hexl-mode-old-local-map)
163 (setq hexl-mode-old-local-map (current-local-map))
164 (use-local-map hexl-mode-map)
165
166 (make-local-variable 'hexl-mode-old-mode-name)
167 (setq hexl-mode-old-mode-name mode-name)
168 (setq mode-name "Hexl")
169
170 (make-local-variable 'hexl-mode-old-major-mode)
171 (setq hexl-mode-old-major-mode major-mode)
172 (setq major-mode 'hexl-mode)
173
31c75fa7 174 (make-local-variable 'write-contents-hooks)
c6fcafde 175 (add-hook 'write-contents-hooks 'hexl-save-buffer)
31c75fa7 176
c3de2bf0
RS		 177 (make-local-hook 'after-revert-hook)
178 (add-hook 'after-revert-hook 'hexl-after-revert-hook nil t)
179
ba275b2d
RS		 180 (make-local-variable 'hexl-max-address)
181
8eeac2ce
RS		 182 (make-local-variable 'change-major-mode-hook)
183 (add-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer)
184
a2535589 185 (let ((modified (buffer-modified-p))
bb752f07 186 (inhibit-read-only t)
a2535589
JA		 187 (original-point (1- (point))))
188 (if (not (or (eq arg 1) (not arg)))
bb752f07 189 ;; if no argument then we guess at hexl-max-address
a2535589 190 (setq hexl-max-address (+ (* (/ (1- (buffer-size)) 68) 16) 15))
a2535589
JA		 191 (setq hexl-max-address (1- (buffer-size)))
192 (hexlify-buffer)
193 (set-buffer-modified-p modified)
a2535589
JA		 194 (hexl-goto-address original-point)))))
195
c3de2bf0
RS		 196(defun hexl-after-revert-hook ()
197 (hexlify-buffer)
198 (set-buffer-modified-p nil))
199
ac2e902d
JB		 200(defvar hexl-in-save-buffer nil)
201
a2535589
JA		 202(defun hexl-save-buffer ()
203 "Save a hexl format buffer as binary in visited file if modified."
204 (interactive)
ac2e902d
JB		 205 (if hexl-in-save-buffer nil
206 (set-buffer-modified-p (if (buffer-modified-p)
207 (save-excursion
208 (let ((buf (generate-new-buffer " hexl"))
209 (name (buffer-name))
210 (file-name (buffer-file-name))
211 (start (point-min))
212 (end (point-max))
213 modified)
214 (set-buffer buf)
215 (insert-buffer-substring name start end)
216 (set-buffer name)
217 (dehexlify-buffer)
218 ;; Prevent infinite recursion.
1fa65e2f
RS		 219 (let ((hexl-in-save-buffer t)
220 (buffer-file-type t)) ; for ms-dos
ac2e902d
JB		 221 (save-buffer))
222 (setq modified (buffer-modified-p))
223 (delete-region (point-min) (point-max))
224 (insert-buffer-substring buf start end)
225 (kill-buffer buf)
226 modified))
227 (message "(No changes need to be saved)")
228 nil))
229 ;; Return t to indicate we have saved t
230 t))
a2535589 231
31c75fa7 232;;;###autoload
a2535589
JA		 233(defun hexl-find-file (filename)
234 "Edit file FILENAME in hexl-mode.
a2535589
JA		 235Switch to a buffer visiting file FILENAME, creating one in none exists."
236 (interactive "fFilename: ")
23fa9040 237 (if (or (eq system-type 'ms-dos) (eq system-type 'windows-nt))
10b501e3
RS		 238 (find-file-binary filename)
239 (find-file filename))
a2535589
JA		 240 (if (not (eq major-mode 'hexl-mode))
241 (hexl-mode)))
242
243(defun hexl-mode-exit (&optional arg)
31c75fa7 244 "Exit Hexl mode, returning to previous mode.
a2535589
JA		 245With arg, don't unhexlify buffer."
246 (interactive "p")
247 (if (or (eq arg 1) (not arg))
248 (let ((modified (buffer-modified-p))
900014dd 249 (inhibit-read-only t)
a2535589 250 (original-point (1+ (hexl-current-address))))
a2535589 251 (dehexlify-buffer)
c6fcafde 252 (remove-hook 'write-contents-hook 'hexl-save-buffer)
a2535589 253 (set-buffer-modified-p modified)
a2535589
JA		 254 (goto-char original-point)))
255 (setq mode-name hexl-mode-old-mode-name)
256 (use-local-map hexl-mode-old-local-map)
257 (setq major-mode hexl-mode-old-major-mode)
8eeac2ce
RS		 258 (force-mode-line-update))
259
260(defun hexl-maybe-dehexlify-buffer ()
261 "Convert a hexl format buffer to binary.
262Ask the user for confirmation."
263 (if (y-or-n-p "Convert contents back to binary format? ")
264 (let ((modified (buffer-modified-p))
265 (inhibit-read-only t)
266 (original-point (1+ (hexl-current-address))))
267 (dehexlify-buffer)
268 (remove-hook 'write-contents-hook 'hexl-save-buffer)
269 (set-buffer-modified-p modified)
270 (goto-char original-point))))
a2535589
JA		 271
272(defun hexl-current-address ()
273 "Return current hexl-address."
274 (interactive)
275 (let ((current-column (- (% (point) 68) 11))
276 (hexl-address 0))
277 (setq hexl-address (+ (* (/ (point) 68) 16)
278 (/ (- current-column (/ current-column 5)) 2)))
279 hexl-address))
280
281(defun hexl-address-to-marker (address)
282 "Return marker for ADDRESS."
283 (interactive "nAddress: ")
284 (+ (* (/ address 16) 68) 11 (/ (* (% address 16) 5) 2)))
285
286(defun hexl-goto-address (address)
287 "Goto hexl-mode (decimal) address ADDRESS.
288
289Signal error if ADDRESS out of range."
290 (interactive "nAddress: ")
291 (if (or (< address 0) (> address hexl-max-address))
292 (error "Out of hexl region."))
293 (goto-char (hexl-address-to-marker address)))
294
295(defun hexl-goto-hex-address (hex-address)
4c8c7ae9 296 "Go to hexl-mode address (hex string) HEX-ADDRESS.
a2535589
JA		 297
298Signal error if HEX-ADDRESS is out of range."
299 (interactive "sHex Address: ")
300 (hexl-goto-address (hexl-hex-string-to-integer hex-address)))
301
302(defun hexl-hex-string-to-integer (hex-string)
303 "Return decimal integer for HEX-STRING."
304 (interactive "sHex number: ")
305 (let ((hex-num 0))
306 (while (not (equal hex-string ""))
307 (setq hex-num (+ (* hex-num 16)
308 (hexl-hex-char-to-integer (string-to-char hex-string))))
309 (setq hex-string (substring hex-string 1)))
310 hex-num))
311
312(defun hexl-octal-string-to-integer (octal-string)
313 "Return decimal integer for OCTAL-STRING."
314 (interactive "sOctal number: ")
315 (let ((oct-num 0))
316 (while (not (equal octal-string ""))
317 (setq oct-num (+ (* oct-num 8)
318 (hexl-oct-char-to-integer
319 (string-to-char octal-string))))
320 (setq octal-string (substring octal-string 1)))
321 oct-num))
322
323;; move point functions
324
325(defun hexl-backward-char (arg)
326 "Move to left ARG bytes (right if ARG negative) in hexl-mode."
327 (interactive "p")
328 (hexl-goto-address (- (hexl-current-address) arg)))
329
330(defun hexl-forward-char (arg)
331 "Move right ARG bytes (left if ARG negative) in hexl-mode."
332 (interactive "p")
333 (hexl-goto-address (+ (hexl-current-address) arg)))
334
335(defun hexl-backward-short (arg)
336 "Move to left ARG shorts (right if ARG negative) in hexl-mode."
337 (interactive "p")
338 (hexl-goto-address (let ((address (hexl-current-address)))
339 (if (< arg 0)
340 (progn
341 (setq arg (- arg))
342 (while (> arg 0)
343 (if (not (equal address (logior address 3)))
344 (if (> address hexl-max-address)
345 (progn
346 (message "End of buffer.")
347 (setq address hexl-max-address))
348 (setq address (logior address 3)))
349 (if (> address hexl-max-address)
350 (progn
351 (message "End of buffer.")
352 (setq address hexl-max-address))
353 (setq address (+ address 4))))
354 (setq arg (1- arg)))
355 (if (> address hexl-max-address)
356 (progn
357 (message "End of buffer.")
358 (setq address hexl-max-address))
359 (setq address (logior address 3))))
360 (while (> arg 0)
361 (if (not (equal address (logand address -4)))
362 (setq address (logand address -4))
363 (if (not (equal address 0))
364 (setq address (- address 4))
365 (message "Beginning of buffer.")))
366 (setq arg (1- arg))))
367 address)))
368
369(defun hexl-forward-short (arg)
370 "Move right ARG shorts (left if ARG negative) in hexl-mode."
371 (interactive "p")
372 (hexl-backward-short (- arg)))
373
374(defun hexl-backward-word (arg)
375 "Move to left ARG words (right if ARG negative) in hexl-mode."
376 (interactive "p")
377 (hexl-goto-address (let ((address (hexl-current-address)))
378 (if (< arg 0)
379 (progn
380 (setq arg (- arg))
381 (while (> arg 0)
382 (if (not (equal address (logior address 7)))
383 (if (> address hexl-max-address)
384 (progn
385 (message "End of buffer.")
386 (setq address hexl-max-address))
387 (setq address (logior address 7)))
388 (if (> address hexl-max-address)
389 (progn
390 (message "End of buffer.")
391 (setq address hexl-max-address))
392 (setq address (+ address 8))))
393 (setq arg (1- arg)))
394 (if (> address hexl-max-address)
395 (progn
396 (message "End of buffer.")
397 (setq address hexl-max-address))
398 (setq address (logior address 7))))
399 (while (> arg 0)
400 (if (not (equal address (logand address -8)))
401 (setq address (logand address -8))
402 (if (not (equal address 0))
403 (setq address (- address 8))
404 (message "Beginning of buffer.")))
405 (setq arg (1- arg))))
406 address)))
407
408(defun hexl-forward-word (arg)
409 "Move right ARG words (left if ARG negative) in hexl-mode."
410 (interactive "p")
411 (hexl-backward-word (- arg)))
412
413(defun hexl-previous-line (arg)
4c8c7ae9
JB		 414 "Move vertically up ARG lines [16 bytes] (down if ARG negative) in hexl-mode.
415If there is byte at the target address move to the last byte in that line."
a2535589
JA		 416 (interactive "p")
417 (hexl-next-line (- arg)))
418
419(defun hexl-next-line (arg)
4c8c7ae9
JB		 420 "Move vertically down ARG lines [16 bytes] (up if ARG negative) in hexl-mode.
421If there is no byte at the target address move to the last byte in that line."
a2535589 422 (interactive "p")
e8a57935 423 (hexl-goto-address (let ((address (+ (hexl-current-address) (* arg 16))))
a2535589
JA		 424 (if (and (< arg 0) (< address 0))
425 (progn (message "Out of hexl region.")
426 (setq address
427 (% (hexl-current-address) 16)))
428 (if (and (> address hexl-max-address)
429 (< (% hexl-max-address 16) (% address 16)))
430 (setq address hexl-max-address)
431 (if (> address hexl-max-address)
432 (progn (message "Out of hexl region.")
433 (setq
434 address
435 (+ (logand hexl-max-address -16)
436 (% (hexl-current-address) 16)))))))
437 address)))
438
439(defun hexl-beginning-of-buffer (arg)
4c8c7ae9
JB		 440 "Move to the beginning of the hexl buffer.
441Leaves `hexl-mark' at previous position.
442With prefix arg N, puts point N bytes of the way from the true beginning."
a2535589
JA		 443 (interactive "p")
444 (push-mark (point))
445 (hexl-goto-address (+ 0 (1- arg))))
446
447(defun hexl-end-of-buffer (arg)
4c8c7ae9 448 "Go to `hexl-max-address' minus ARG."
a2535589
JA		 449 (interactive "p")
450 (push-mark (point))
451 (hexl-goto-address (- hexl-max-address (1- arg))))
452
453(defun hexl-beginning-of-line ()
454 "Goto beginning of line in hexl mode."
455 (interactive)
456 (goto-char (+ (* (/ (point) 68) 68) 11)))
457
458(defun hexl-end-of-line ()
459 "Goto end of line in hexl mode."
460 (interactive)
461 (hexl-goto-address (let ((address (logior (hexl-current-address) 15)))
462 (if (> address hexl-max-address)
463 (setq address hexl-max-address))
464 address)))
465
466(defun hexl-scroll-down (arg)
467 "Scroll hexl buffer window upward ARG lines; or near full window if no ARG."
468 (interactive "P")
469 (if (null arg)
470 (setq arg (1- (window-height)))
471 (setq arg (prefix-numeric-value arg)))
472 (hexl-scroll-up (- arg)))
473
474(defun hexl-scroll-up (arg)
475 "Scroll hexl buffer window upward ARG lines; or near full window if no ARG."
476 (interactive "P")
477 (if (null arg)
478 (setq arg (1- (window-height)))
479 (setq arg (prefix-numeric-value arg)))
480 (let ((movement (* arg 16))
481 (address (hexl-current-address)))
482 (if (or (> (+ address movement) hexl-max-address)
483 (< (+ address movement) 0))
484 (message "Out of hexl region.")
485 (hexl-goto-address (+ address movement))
486 (recenter 0))))
487
488(defun hexl-beginning-of-1k-page ()
489 "Goto to beginning of 1k boundry."
490 (interactive)
491 (hexl-goto-address (logand (hexl-current-address) -1024)))
492
493(defun hexl-end-of-1k-page ()
494 "Goto to end of 1k boundry."
495 (interactive)
496 (hexl-goto-address (let ((address (logior (hexl-current-address) 1023)))
497 (if (> address hexl-max-address)
498 (setq address hexl-max-address))
499 address)))
500
501(defun hexl-beginning-of-512b-page ()
502 "Goto to beginning of 512 byte boundry."
503 (interactive)
504 (hexl-goto-address (logand (hexl-current-address) -512)))
505
506(defun hexl-end-of-512b-page ()
507 "Goto to end of 512 byte boundry."
508 (interactive)
509 (hexl-goto-address (let ((address (logior (hexl-current-address) 511)))
510 (if (> address hexl-max-address)
511 (setq address hexl-max-address))
512 address)))
513
514(defun hexl-quoted-insert (arg)
515 "Read next input character and insert it.
516Useful for inserting control characters.
517You may also type up to 3 octal digits, to insert a character with that code"
518 (interactive "p")
519 (hexl-insert-char (read-quoted-char) arg))
520
521;00000000: 0011 2233 4455 6677 8899 aabb ccdd eeff 0123456789ABCDEF
522
f4e3d4eb 523;;;###autoload
a2535589 524(defun hexlify-buffer ()
8eeac2ce 525 "Convert a binary buffer to hexl format."
a2535589 526 (interactive)
1fa65e2f
RS		 527 (let ((binary-process-output nil) ; for Ms-Dos
528 (binary-process-input t))
529 (shell-command-on-region (point-min) (point-max) hexlify-command t)))
a2535589
JA		 530
531(defun dehexlify-buffer ()
532 "Convert a hexl format buffer to binary."
533 (interactive)
1fa65e2f
RS		 534 (let ((binary-process-output t) ; for Ms-Dos
535 (binary-process-input nil))
10b501e3 536 (shell-command-on-region (point-min) (point-max) dehexlify-command t)))
a2535589
JA		 537
538(defun hexl-char-after-point ()
539 "Return char for ASCII hex digits at point."
686fc9ab
RS		 540 (hexl-htoi (char-after (point))
541 (char-after (1+ (point)))))
a2535589
JA		 542
543(defun hexl-htoi (lh rh)
544 "Hex (char) LH (char) RH to integer."
545 (+ (* (hexl-hex-char-to-integer lh) 16)
546 (hexl-hex-char-to-integer rh)))
547
548(defun hexl-hex-char-to-integer (character)
549 "Take a char and return its value as if it was a hex digit."
550 (if (and (>= character ?0) (<= character ?9))
551 (- character ?0)
552 (let ((ch (logior character 32)))
553 (if (and (>= ch ?a) (<= ch ?f))
554 (- ch (- ?a 10))
555 (error (format "Invalid hex digit `%c'." ch))))))
556
557(defun hexl-oct-char-to-integer (character)
558 "Take a char and return its value as if it was a octal digit."
559 (if (and (>= character ?0) (<= character ?7))
560 (- character ?0)
561 (error (format "Invalid octal digit `%c'." character))))
562
563(defun hexl-printable-character (ch)
564 "Return a displayable string for character CH."
565 (format "%c" (if hexl-iso
566 (if (or (< ch 32) (and (>= ch 127) (< ch 160)))
567 46
568 ch)
569 (if (or (< ch 32) (>= ch 127))
570 46
571 ch))))
572
573(defun hexl-self-insert-command (arg)
574 "Insert this character."
575 (interactive "p")
576 (hexl-insert-char last-command-char arg))
577
578(defun hexl-insert-char (ch num)
579 "Insert a character in a hexl buffer."
580 (let ((address (hexl-current-address)))
581 (while (> num 0)
582 (delete-char 2)
583 (insert (format "%02x" ch))
584 (goto-char
585 (+ (* (/ address 16) 68) 52 (% address 16)))
586 (delete-char 1)
587 (insert (hexl-printable-character ch))
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KH		 588 (or (eq address hexl-max-address)
589 (setq address (1+ address)))
590 (hexl-goto-address address)
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JA		 591 (setq num (1- num)))))
592
593;; hex conversion
594
595(defun hexl-insert-hex-char (arg)
596 "Insert a ASCII char ARG times at point for a given hexadecimal number."
597 (interactive "p")
598 (let ((num (hexl-hex-string-to-integer (read-string "Hex number: "))))
599 (if (or (> num 255) (< num 0))
600 (error "Hex number out of range.")
601 (hexl-insert-char num arg))))
602
603(defun hexl-insert-decimal-char (arg)
604 "Insert a ASCII char ARG times at point for a given decimal number."
605 (interactive "p")
606 (let ((num (string-to-int (read-string "Decimal Number: "))))
607 (if (or (> num 255) (< num 0))
608 (error "Decimal number out of range.")
609 (hexl-insert-char num arg))))
610
611(defun hexl-insert-octal-char (arg)
612 "Insert a ASCII char ARG times at point for a given octal number."
613 (interactive "p")
614 (let ((num (hexl-octal-string-to-integer (read-string "Octal Number: "))))
615 (if (or (> num 255) (< num 0))
616 (error "Decimal number out of range.")
617 (hexl-insert-char num arg))))
618
619;; startup stuff.
620
621(if hexl-mode-map
622 nil
623 (setq hexl-mode-map (make-sparse-keymap))
624
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KH		 625 (define-key hexl-mode-map [left] 'hexl-backward-char)
626 (define-key hexl-mode-map [right] 'hexl-forward-char)
627 (define-key hexl-mode-map [up] 'hexl-previous-line)
628 (define-key hexl-mode-map [down] 'hexl-next-line)
629 (define-key hexl-mode-map [M-left] 'hexl-backward-short)
630 (define-key hexl-mode-map [M-right] 'hexl-forward-short)
631 (define-key hexl-mode-map [next] 'hexl-scroll-up)
632 (define-key hexl-mode-map [prev] 'hexl-scroll-down)
633
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JA		 634 (define-key hexl-mode-map "\C-a" 'hexl-beginning-of-line)
635 (define-key hexl-mode-map "\C-b" 'hexl-backward-char)
636 (define-key hexl-mode-map "\C-d" 'undefined)
637 (define-key hexl-mode-map "\C-e" 'hexl-end-of-line)
638 (define-key hexl-mode-map "\C-f" 'hexl-forward-char)
639
b9a4b501 640 (if (not (eq (key-binding (char-to-string help-char)) 'help-command))
7e17a6aa 641 (define-key hexl-mode-map (char-to-string help-char) 'undefined))
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JA		 642
643 (define-key hexl-mode-map "\C-i" 'hexl-self-insert-command)
644 (define-key hexl-mode-map "\C-j" 'hexl-self-insert-command)
645 (define-key hexl-mode-map "\C-k" 'undefined)
646 (define-key hexl-mode-map "\C-m" 'hexl-self-insert-command)
647 (define-key hexl-mode-map "\C-n" 'hexl-next-line)
648 (define-key hexl-mode-map "\C-o" 'undefined)
649 (define-key hexl-mode-map "\C-p" 'hexl-previous-line)
650 (define-key hexl-mode-map "\C-q" 'hexl-quoted-insert)
651 (define-key hexl-mode-map "\C-t" 'undefined)
652 (define-key hexl-mode-map "\C-v" 'hexl-scroll-up)
653 (define-key hexl-mode-map "\C-w" 'undefined)
654 (define-key hexl-mode-map "\C-y" 'undefined)
655
656 (let ((ch 32))
657 (while (< ch 127)
658 (define-key hexl-mode-map (format "%c" ch) 'hexl-self-insert-command)
659 (setq ch (1+ ch))))
660
661 (define-key hexl-mode-map "\e\C-a" 'hexl-beginning-of-512b-page)
662 (define-key hexl-mode-map "\e\C-b" 'hexl-backward-short)
663 (define-key hexl-mode-map "\e\C-c" 'undefined)
664 (define-key hexl-mode-map "\e\C-d" 'hexl-insert-decimal-char)
665 (define-key hexl-mode-map "\e\C-e" 'hexl-end-of-512b-page)
666 (define-key hexl-mode-map "\e\C-f" 'hexl-forward-short)
667 (define-key hexl-mode-map "\e\C-g" 'undefined)
668 (define-key hexl-mode-map "\e\C-h" 'undefined)
669 (define-key hexl-mode-map "\e\C-i" 'undefined)
670 (define-key hexl-mode-map "\e\C-j" 'undefined)
671 (define-key hexl-mode-map "\e\C-k" 'undefined)
672 (define-key hexl-mode-map "\e\C-l" 'undefined)
673 (define-key hexl-mode-map "\e\C-m" 'undefined)
674 (define-key hexl-mode-map "\e\C-n" 'undefined)
675 (define-key hexl-mode-map "\e\C-o" 'hexl-insert-octal-char)
676 (define-key hexl-mode-map "\e\C-p" 'undefined)
677 (define-key hexl-mode-map "\e\C-q" 'undefined)
678 (define-key hexl-mode-map "\e\C-r" 'undefined)
679 (define-key hexl-mode-map "\e\C-s" 'undefined)
680 (define-key hexl-mode-map "\e\C-t" 'undefined)
681 (define-key hexl-mode-map "\e\C-u" 'undefined)
682
683 (define-key hexl-mode-map "\e\C-w" 'undefined)
684 (define-key hexl-mode-map "\e\C-x" 'hexl-insert-hex-char)
685 (define-key hexl-mode-map "\e\C-y" 'undefined)
686
31c75fa7 687 (define-key hexl-mode-map "\ea" 'undefined)
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JA		 688 (define-key hexl-mode-map "\eb" 'hexl-backward-word)
689 (define-key hexl-mode-map "\ec" 'undefined)
690 (define-key hexl-mode-map "\ed" 'undefined)
31c75fa7 691 (define-key hexl-mode-map "\ee" 'undefined)
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JA		 692 (define-key hexl-mode-map "\ef" 'hexl-forward-word)
693 (define-key hexl-mode-map "\eg" 'hexl-goto-hex-address)
694 (define-key hexl-mode-map "\eh" 'undefined)
695 (define-key hexl-mode-map "\ei" 'undefined)
696 (define-key hexl-mode-map "\ej" 'hexl-goto-address)
697 (define-key hexl-mode-map "\ek" 'undefined)
698 (define-key hexl-mode-map "\el" 'undefined)
699 (define-key hexl-mode-map "\em" 'undefined)
700 (define-key hexl-mode-map "\en" 'undefined)
701 (define-key hexl-mode-map "\eo" 'undefined)
702 (define-key hexl-mode-map "\ep" 'undefined)
703 (define-key hexl-mode-map "\eq" 'undefined)
704 (define-key hexl-mode-map "\er" 'undefined)
705 (define-key hexl-mode-map "\es" 'undefined)
706 (define-key hexl-mode-map "\et" 'undefined)
707 (define-key hexl-mode-map "\eu" 'undefined)
708 (define-key hexl-mode-map "\ev" 'hexl-scroll-down)
709 (define-key hexl-mode-map "\ey" 'undefined)
710 (define-key hexl-mode-map "\ez" 'undefined)
711 (define-key hexl-mode-map "\e<" 'hexl-beginning-of-buffer)
712 (define-key hexl-mode-map "\e>" 'hexl-end-of-buffer)
713
714 (define-key hexl-mode-map "\C-c\C-c" 'hexl-mode-exit)
715
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RS		 716 (define-key hexl-mode-map "\C-x[" 'hexl-beginning-of-1k-page)
717 (define-key hexl-mode-map "\C-x]" 'hexl-end-of-1k-page)
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JA		 718 (define-key hexl-mode-map "\C-x\C-p" 'undefined)
719 (define-key hexl-mode-map "\C-x\C-s" 'hexl-save-buffer)
720 (define-key hexl-mode-map "\C-x\C-t" 'undefined))
721
1a06eabd 722;;; hexl.el ends here
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