lisp/hexl.el

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