home *** CD-ROM | disk | FTP | other *** search
- ;;; hexl.el --- edit a file in a hex dump format using the hexl filter.
-
- ;; Copyright (C) 1989, 1994 Free Software Foundation, Inc.
-
- ;; Author: Keith Gabryelski <ag@wheaties.ai.mit.edu>
- ;; Maintainer: FSF
- ;; Keywords: data
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
-
- ;; This package implements a major mode for editing binary files. It uses
- ;; a program called hexl, supplied with the GNU Emacs distribution, that
- ;; can filter a binary into an editable format or from the format back into
- ;; binary. For full instructions, invoke `hexl-mode' on an empty buffer and
- ;; do `M-x describe-mode'.
- ;;
- ;; This may be useful in your .emacs:
- ;;
- ;; (autoload 'hexl-find-file "hexl"
- ;; "Edit file FILENAME in hexl-mode." t)
- ;;
- ;; (define-key global-map "\C-c\C-h" 'hexl-find-file)
- ;;
- ;; NOTE: Remember to change HEXL-PROGRAM or HEXL-OPTIONS if needed.
- ;;
- ;; Currently hexl only supports big endian hex output with 16 bit
- ;; grouping.
- ;;
- ;; -iso in `hexl-options' will allow iso characters to display in the
- ;; ASCII region of the screen (if your emacs supports this) instead of
- ;; changing them to dots.
-
- ;;; Code:
-
- ;;
- ;; vars here
- ;;
-
- (defvar hexl-program "hexl"
- "The program that will hexlify and dehexlify its stdin.
- `hexl-program' will always be concatenated with `hexl-options'
- and \"-de\" when dehexlifying a buffer.")
-
- (defvar hexl-iso ""
- "If your emacs can handle ISO characters, this should be set to
- \"-iso\" otherwise it should be \"\".")
-
- (defvar hexl-options (format "-hex %s" hexl-iso)
- "Options to hexl-program that suit your needs.")
-
- (defvar hexlify-command
- (format "%s%s %s" exec-directory hexl-program hexl-options)
- "The command to use to hexlify a buffer.")
-
- (defvar dehexlify-command
- (format "%s%s -de %s" exec-directory hexl-program hexl-options)
- "The command to use to unhexlify a buffer.")
-
- (defvar hexl-max-address 0
- "Maximum offset into hexl buffer.")
-
- (defvar hexl-mode-map nil)
-
- (defvar hexl-mode-old-local-map)
- (defvar hexl-mode-old-mode-name)
- (defvar hexl-mode-old-major-mode)
- (defvar hexl-mode-old-write-contents-hooks)
- (defvar hexl-mode-old-require-final-newline)
- (defvar hexl-mode-old-syntax-table)
-
- ;; routines
-
- ;;;###autoload
- (defun hexl-mode (&optional arg)
- "\\<hexl-mode-map>
- A major mode for editing binary files in hex dump format.
-
- This function automatically converts a buffer into the hexl format
- using the function `hexlify-buffer'.
-
- Each line in the buffer has an \"address\" (displayed in hexadecimal)
- representing the offset into the file that the characters on this line
- are at and 16 characters from the file (displayed as hexadecimal
- values grouped every 16 bits) and as their ASCII values.
-
- If any of the characters (displayed as ASCII characters) are
- unprintable (control or meta characters) they will be replaced as
- periods.
-
- If `hexl-mode' is invoked with an argument the buffer is assumed to be
- in hexl format.
-
- A sample format:
-
- HEX ADDR: 0001 0203 0405 0607 0809 0a0b 0c0d 0e0f ASCII-TEXT
- -------- ---- ---- ---- ---- ---- ---- ---- ---- ----------------
- 00000000: 5468 6973 2069 7320 6865 786c 2d6d 6f64 This is hexl-mod
- 00000010: 652e 2020 4561 6368 206c 696e 6520 7265 e. Each line re
- 00000020: 7072 6573 656e 7473 2031 3620 6279 7465 presents 16 byte
- 00000030: 7320 6173 2068 6578 6164 6563 696d 616c s as hexadecimal
- 00000040: 2041 5343 4949 0a61 6e64 2070 7269 6e74 ASCII.and print
- 00000050: 6162 6c65 2041 5343 4949 2063 6861 7261 able ASCII chara
- 00000060: 6374 6572 732e 2020 416e 7920 636f 6e74 cters. Any cont
- 00000070: 726f 6c20 6f72 206e 6f6e 2d41 5343 4949 rol or non-ASCII
- 00000080: 2063 6861 7261 6374 6572 730a 6172 6520 characters.are
- 00000090: 6469 7370 6c61 7965 6420 6173 2070 6572 displayed as per
- 000000a0: 696f 6473 2069 6e20 7468 6520 7072 696e iods in the prin
- 000000b0: 7461 626c 6520 6368 6172 6163 7465 7220 table character
- 000000c0: 7265 6769 6f6e 2e0a region..
-
- Movement is as simple as movement in a normal emacs text buffer. Most
- cursor movement bindings are the same (ie. Use \\[hexl-backward-char], \\[hexl-forward-char], \\[hexl-next-line], and \\[hexl-previous-line]
- to move the cursor left, right, down, and up).
-
- Advanced cursor movement commands (ala \\[hexl-beginning-of-line], \\[hexl-end-of-line], \\[hexl-beginning-of-buffer], and \\[hexl-end-of-buffer]) are
- also supported.
-
- There are several ways to change text in hexl mode:
-
- ASCII characters (character between space (0x20) and tilde (0x7E)) are
- bound to self-insert so you can simply type the character and it will
- insert itself (actually overstrike) into the buffer.
-
- \\[hexl-quoted-insert] followed by another keystroke allows you to insert the key even if
- it isn't bound to self-insert. An octal number can be supplied in place
- of another key to insert the octal number's ASCII representation.
-
- \\[hexl-insert-hex-char] will insert a given hexadecimal value (if it is between 0 and 0xFF)
- into the buffer at the current point.
-
- \\[hexl-insert-octal-char] will insert a given octal value (if it is between 0 and 0377)
- into the buffer at the current point.
-
- \\[hexl-insert-decimal-char] will insert a given decimal value (if it is between 0 and 255)
- into the buffer at the current point.
-
- \\[hexl-mode-exit] will exit hexl-mode.
-
- Note: saving the file with any of the usual Emacs commands
- will actually convert it back to binary format while saving.
-
- You can use \\[hexl-find-file] to visit a file in hexl-mode.
-
- \\[describe-bindings] for advanced commands."
- (interactive "p")
- (if (eq major-mode 'hexl-mode)
- (error "You are already in hexl mode")
-
- (let ((modified (buffer-modified-p))
- (inhibit-read-only t)
- (original-point (1- (point)))
- max-address)
- (and (eobp) (not (bobp))
- (setq original-point (1- original-point)))
- (if (not (or (eq arg 1) (not arg)))
- ;; if no argument then we guess at hexl-max-address
- (setq max-address (+ (* (/ (1- (buffer-size)) 68) 16) 15))
- (setq max-address (1- (buffer-size)))
- (hexlify-buffer)
- (set-buffer-modified-p modified))
- (make-local-variable 'hexl-max-address)
- (setq hexl-max-address max-address)
- (hexl-goto-address original-point))
-
- ;; We do not turn off the old major mode; instead we just
- ;; override most of it. That way, we can restore it perfectly.
- (make-local-variable 'hexl-mode-old-local-map)
- (setq hexl-mode-old-local-map (current-local-map))
- (use-local-map hexl-mode-map)
-
- (make-local-variable 'hexl-mode-old-mode-name)
- (setq hexl-mode-old-mode-name mode-name)
- (setq mode-name "Hexl")
-
- (make-local-variable 'hexl-mode-old-major-mode)
- (setq hexl-mode-old-major-mode major-mode)
- (setq major-mode 'hexl-mode)
-
- (make-local-variable 'hexl-mode-old-syntax-table)
- (setq hexl-mode-old-syntax-table (syntax-table))
- (set-syntax-table (standard-syntax-table))
-
- (make-local-variable 'hexl-mode-old-write-contents-hooks)
- (setq hexl-mode-old-write-contents-hooks write-contents-hooks)
- (make-local-variable 'write-contents-hooks)
- (add-hook 'write-contents-hooks 'hexl-save-buffer)
-
- (make-local-variable 'hexl-mode-old-require-final-newline)
- (setq hexl-mode-old-require-final-newline require-final-newline)
- (make-local-variable 'require-final-newline)
- (setq require-final-newline nil)
-
- ;; Add hooks to rehexlify or dehexlify on various events.
- (make-local-hook 'after-revert-hook)
- (add-hook 'after-revert-hook 'hexl-after-revert-hook nil t)
-
- (make-local-hook 'change-major-mode-hook)
- (add-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer nil t))
- (run-hooks 'hexl-mode-hook))
-
- (defun hexl-after-revert-hook ()
- (hexlify-buffer)
- (set-buffer-modified-p nil))
-
- (defvar hexl-in-save-buffer nil)
-
- (defun hexl-save-buffer ()
- "Save a hexl format buffer as binary in visited file if modified."
- (interactive)
- (if hexl-in-save-buffer nil
- (set-buffer-modified-p (if (buffer-modified-p)
- (save-excursion
- (let ((buf (generate-new-buffer " hexl"))
- (name (buffer-name))
- (file-name (buffer-file-name))
- (start (point-min))
- (end (point-max))
- modified)
- (set-buffer buf)
- (insert-buffer-substring name start end)
- (set-buffer name)
- (dehexlify-buffer)
- ;; Prevent infinite recursion.
- (let ((hexl-in-save-buffer t)
- (buffer-file-type t)) ; for ms-dos
- (save-buffer))
- (setq modified (buffer-modified-p))
- (delete-region (point-min) (point-max))
- (insert-buffer-substring buf start end)
- (kill-buffer buf)
- modified))
- (message "(No changes need to be saved)")
- nil))
- ;; Return t to indicate we have saved t
- t))
-
- ;;;###autoload
- (defun hexl-find-file (filename)
- "Edit file FILENAME in hexl-mode.
- Switch to a buffer visiting file FILENAME, creating one in none exists."
- (interactive "fFilename: ")
- (if (or (eq system-type 'ms-dos) (eq system-type 'windows-nt))
- (find-file-binary filename)
- (find-file filename))
- (if (not (eq major-mode 'hexl-mode))
- (hexl-mode)))
-
- (defun hexl-mode-exit (&optional arg)
- "Exit Hexl mode, returning to previous mode.
- With arg, don't unhexlify buffer."
- (interactive "p")
- (if (or (eq arg 1) (not arg))
- (let ((modified (buffer-modified-p))
- (inhibit-read-only t)
- (original-point (1+ (hexl-current-address))))
- (dehexlify-buffer)
- (remove-hook 'write-contents-hooks 'hexl-save-buffer)
- (set-buffer-modified-p modified)
- (goto-char original-point)))
-
- (remove-hook 'after-revert-hook 'hexl-after-revert-hook t)
- (remove-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer t)
-
- (setq write-contents-hooks hexl-mode-old-write-contents-hooks)
- (setq require-final-newline hexl-mode-old-require-final-newline)
- (setq mode-name hexl-mode-old-mode-name)
- (use-local-map hexl-mode-old-local-map)
- (set-syntax-table hexl-mode-old-syntax-table)
- (setq major-mode hexl-mode-old-major-mode)
- (force-mode-line-update))
-
- (defun hexl-maybe-dehexlify-buffer ()
- "Convert a hexl format buffer to binary.
- Ask the user for confirmation."
- (if (y-or-n-p "Convert contents back to binary format? ")
- (let ((modified (buffer-modified-p))
- (inhibit-read-only t)
- (original-point (1+ (hexl-current-address))))
- (dehexlify-buffer)
- (remove-hook 'write-contents-hooks 'hexl-save-buffer)
- (set-buffer-modified-p modified)
- (goto-char original-point))))
-
- (defun hexl-current-address (&optional validate)
- "Return current hexl-address."
- (interactive)
- (let ((current-column (- (% (point) 68) 11))
- (hexl-address 0))
- (if (< current-column 0)
- (if validate
- (error "Point is not on a character in the file")
- (setq current-column 0)))
- (setq hexl-address
- (+ (* (/ (point) 68) 16)
- (if (>= current-column 41)
- (- current-column 41)
- (/ (- current-column (/ current-column 5)) 2))))
- hexl-address))
-
- (defun hexl-address-to-marker (address)
- "Return marker for ADDRESS."
- (interactive "nAddress: ")
- (+ (* (/ address 16) 68) 11 (/ (* (% address 16) 5) 2)))
-
- (defun hexl-goto-address (address)
- "Goto hexl-mode (decimal) address ADDRESS.
- Signal error if ADDRESS out of range."
- (interactive "nAddress: ")
- (if (or (< address 0) (> address hexl-max-address))
- (error "Out of hexl region."))
- (goto-char (hexl-address-to-marker address)))
-
- (defun hexl-goto-hex-address (hex-address)
- "Go to hexl-mode address (hex string) HEX-ADDRESS.
- Signal error if HEX-ADDRESS is out of range."
- (interactive "sHex Address: ")
- (hexl-goto-address (hexl-hex-string-to-integer hex-address)))
-
- (defun hexl-hex-string-to-integer (hex-string)
- "Return decimal integer for HEX-STRING."
- (interactive "sHex number: ")
- (let ((hex-num 0))
- (while (not (equal hex-string ""))
- (setq hex-num (+ (* hex-num 16)
- (hexl-hex-char-to-integer (string-to-char hex-string))))
- (setq hex-string (substring hex-string 1)))
- hex-num))
-
- (defun hexl-octal-string-to-integer (octal-string)
- "Return decimal integer for OCTAL-STRING."
- (interactive "sOctal number: ")
- (let ((oct-num 0))
- (while (not (equal octal-string ""))
- (setq oct-num (+ (* oct-num 8)
- (hexl-oct-char-to-integer
- (string-to-char octal-string))))
- (setq octal-string (substring octal-string 1)))
- oct-num))
-
- ;; move point functions
-
- (defun hexl-backward-char (arg)
- "Move to left ARG bytes (right if ARG negative) in hexl-mode."
- (interactive "p")
- (hexl-goto-address (- (hexl-current-address) arg)))
-
- (defun hexl-forward-char (arg)
- "Move right ARG bytes (left if ARG negative) in hexl-mode."
- (interactive "p")
- (hexl-goto-address (+ (hexl-current-address) arg)))
-
- (defun hexl-backward-short (arg)
- "Move to left ARG shorts (right if ARG negative) in hexl-mode."
- (interactive "p")
- (hexl-goto-address (let ((address (hexl-current-address)))
- (if (< arg 0)
- (progn
- (setq arg (- arg))
- (while (> arg 0)
- (if (not (equal address (logior address 3)))
- (if (> address hexl-max-address)
- (progn
- (message "End of buffer.")
- (setq address hexl-max-address))
- (setq address (logior address 3)))
- (if (> address hexl-max-address)
- (progn
- (message "End of buffer.")
- (setq address hexl-max-address))
- (setq address (+ address 4))))
- (setq arg (1- arg)))
- (if (> address hexl-max-address)
- (progn
- (message "End of buffer.")
- (setq address hexl-max-address))
- (setq address (logior address 3))))
- (while (> arg 0)
- (if (not (equal address (logand address -4)))
- (setq address (logand address -4))
- (if (not (equal address 0))
- (setq address (- address 4))
- (message "Beginning of buffer.")))
- (setq arg (1- arg))))
- address)))
-
- (defun hexl-forward-short (arg)
- "Move right ARG shorts (left if ARG negative) in hexl-mode."
- (interactive "p")
- (hexl-backward-short (- arg)))
-
- (defun hexl-backward-word (arg)
- "Move to left ARG words (right if ARG negative) in hexl-mode."
- (interactive "p")
- (hexl-goto-address (let ((address (hexl-current-address)))
- (if (< arg 0)
- (progn
- (setq arg (- arg))
- (while (> arg 0)
- (if (not (equal address (logior address 7)))
- (if (> address hexl-max-address)
- (progn
- (message "End of buffer.")
- (setq address hexl-max-address))
- (setq address (logior address 7)))
- (if (> address hexl-max-address)
- (progn
- (message "End of buffer.")
- (setq address hexl-max-address))
- (setq address (+ address 8))))
- (setq arg (1- arg)))
- (if (> address hexl-max-address)
- (progn
- (message "End of buffer.")
- (setq address hexl-max-address))
- (setq address (logior address 7))))
- (while (> arg 0)
- (if (not (equal address (logand address -8)))
- (setq address (logand address -8))
- (if (not (equal address 0))
- (setq address (- address 8))
- (message "Beginning of buffer.")))
- (setq arg (1- arg))))
- address)))
-
- (defun hexl-forward-word (arg)
- "Move right ARG words (left if ARG negative) in hexl-mode."
- (interactive "p")
- (hexl-backward-word (- arg)))
-
- (defun hexl-previous-line (arg)
- "Move vertically up ARG lines [16 bytes] (down if ARG negative) in hexl-mode.
- If there is byte at the target address move to the last byte in that line."
- (interactive "p")
- (hexl-next-line (- arg)))
-
- (defun hexl-next-line (arg)
- "Move vertically down ARG lines [16 bytes] (up if ARG negative) in hexl-mode.
- If there is no byte at the target address move to the last byte in that line."
- (interactive "p")
- (hexl-goto-address (let ((address (+ (hexl-current-address) (* arg 16))))
- (if (and (< arg 0) (< address 0))
- (progn (message "Out of hexl region.")
- (setq address
- (% (hexl-current-address) 16)))
- (if (and (> address hexl-max-address)
- (< (% hexl-max-address 16) (% address 16)))
- (setq address hexl-max-address)
- (if (> address hexl-max-address)
- (progn (message "Out of hexl region.")
- (setq
- address
- (+ (logand hexl-max-address -16)
- (% (hexl-current-address) 16)))))))
- address)))
-
- (defun hexl-beginning-of-buffer (arg)
- "Move to the beginning of the hexl buffer.
- Leaves `hexl-mark' at previous position.
- With prefix arg N, puts point N bytes of the way from the true beginning."
- (interactive "p")
- (push-mark (point))
- (hexl-goto-address (+ 0 (1- arg))))
-
- (defun hexl-end-of-buffer (arg)
- "Go to `hexl-max-address' minus ARG."
- (interactive "p")
- (push-mark (point))
- (hexl-goto-address (- hexl-max-address (1- arg))))
-
- (defun hexl-beginning-of-line ()
- "Goto beginning of line in hexl mode."
- (interactive)
- (goto-char (+ (* (/ (point) 68) 68) 11)))
-
- (defun hexl-end-of-line ()
- "Goto end of line in hexl mode."
- (interactive)
- (hexl-goto-address (let ((address (logior (hexl-current-address) 15)))
- (if (> address hexl-max-address)
- (setq address hexl-max-address))
- address)))
-
- (defun hexl-scroll-down (arg)
- "Scroll hexl buffer window upward ARG lines; or near full window if no ARG."
- (interactive "P")
- (if (null arg)
- (setq arg (1- (window-height)))
- (setq arg (prefix-numeric-value arg)))
- (hexl-scroll-up (- arg)))
-
- (defun hexl-scroll-up (arg)
- "Scroll hexl buffer window upward ARG lines; or near full window if no ARG."
- (interactive "P")
- (if (null arg)
- (setq arg (1- (window-height)))
- (setq arg (prefix-numeric-value arg)))
- (let ((movement (* arg 16))
- (address (hexl-current-address)))
- (if (or (> (+ address movement) hexl-max-address)
- (< (+ address movement) 0))
- (message "Out of hexl region.")
- (hexl-goto-address (+ address movement))
- (recenter 0))))
-
- (defun hexl-beginning-of-1k-page ()
- "Go to beginning of 1k boundary."
- (interactive)
- (hexl-goto-address (logand (hexl-current-address) -1024)))
-
- (defun hexl-end-of-1k-page ()
- "Go to end of 1k boundary."
- (interactive)
- (hexl-goto-address (let ((address (logior (hexl-current-address) 1023)))
- (if (> address hexl-max-address)
- (setq address hexl-max-address))
- address)))
-
- (defun hexl-beginning-of-512b-page ()
- "Go to beginning of 512 byte boundary."
- (interactive)
- (hexl-goto-address (logand (hexl-current-address) -512)))
-
- (defun hexl-end-of-512b-page ()
- "Go to end of 512 byte boundary."
- (interactive)
- (hexl-goto-address (let ((address (logior (hexl-current-address) 511)))
- (if (> address hexl-max-address)
- (setq address hexl-max-address))
- address)))
-
- (defun hexl-quoted-insert (arg)
- "Read next input character and insert it.
- Useful for inserting control characters.
- You may also type up to 3 octal digits, to insert a character with that code"
- (interactive "p")
- (hexl-insert-char (read-quoted-char) arg))
-
- ;00000000: 0011 2233 4455 6677 8899 aabb ccdd eeff 0123456789ABCDEF
-
- ;;;###autoload
- (defun hexlify-buffer ()
- "Convert a binary buffer to hexl format.
- This discards the buffer's undo information."
- (interactive)
- (and buffer-undo-list
- (or (y-or-n-p "Converting to hexl format discards undo info; ok? ")
- (error "Aborted")))
- (setq buffer-undo-list nil)
- (let ((binary-process-output nil) ; for Ms-Dos
- (binary-process-input t)
- (buffer-undo-list t))
- (shell-command-on-region (point-min) (point-max) hexlify-command t)))
-
- (defun dehexlify-buffer ()
- "Convert a hexl format buffer to binary.
- This discards the buffer's undo information."
- (interactive)
- (and buffer-undo-list
- (or (y-or-n-p "Converting from hexl format discards undo info; ok? ")
- (error "Aborted")))
- (setq buffer-undo-list nil)
- (let ((binary-process-output t) ; for Ms-Dos
- (binary-process-input nil)
- (buffer-undo-list t))
- (shell-command-on-region (point-min) (point-max) dehexlify-command t)))
-
- (defun hexl-char-after-point ()
- "Return char for ASCII hex digits at point."
- (hexl-htoi (char-after (point))
- (char-after (1+ (point)))))
-
- (defun hexl-htoi (lh rh)
- "Hex (char) LH (char) RH to integer."
- (+ (* (hexl-hex-char-to-integer lh) 16)
- (hexl-hex-char-to-integer rh)))
-
- (defun hexl-hex-char-to-integer (character)
- "Take a char and return its value as if it was a hex digit."
- (if (and (>= character ?0) (<= character ?9))
- (- character ?0)
- (let ((ch (logior character 32)))
- (if (and (>= ch ?a) (<= ch ?f))
- (- ch (- ?a 10))
- (error "Invalid hex digit `%c'." ch)))))
-
- (defun hexl-oct-char-to-integer (character)
- "Take a char and return its value as if it was a octal digit."
- (if (and (>= character ?0) (<= character ?7))
- (- character ?0)
- (error "Invalid octal digit `%c'." character)))
-
- (defun hexl-printable-character (ch)
- "Return a displayable string for character CH."
- (format "%c" (if hexl-iso
- (if (or (< ch 32) (and (>= ch 127) (< ch 160)))
- 46
- ch)
- (if (or (< ch 32) (>= ch 127))
- 46
- ch))))
-
- (defun hexl-self-insert-command (arg)
- "Insert this character."
- (interactive "p")
- (hexl-insert-char last-command-char arg))
-
- (defun hexl-insert-char (ch num)
- "Insert a character in a hexl buffer."
- (let ((address (hexl-current-address t)))
- (while (> num 0)
- (let ((hex-position
- (+ (* (/ address 16) 68)
- 11
- (* 2 (% address 16))
- (/ (% address 16) 2)))
- (ascii-position
- (+ (* (/ address 16) 68) 52 (% address 16)))
- at-ascii-position)
- (if (= (point) ascii-position)
- (setq at-ascii-position t))
- (goto-char hex-position)
- (delete-char 2)
- (insert (format "%02x" ch))
- (goto-char ascii-position)
- (delete-char 1)
- (insert (hexl-printable-character ch))
- (or (eq address hexl-max-address)
- (setq address (1+ address)))
- (hexl-goto-address address)
- (if at-ascii-position
- (progn
- (beginning-of-line)
- (forward-char 51)
- (forward-char (% address 16)))))
- (setq num (1- num)))))
-
- ;; hex conversion
-
- (defun hexl-insert-hex-char (arg)
- "Insert a ASCII char ARG times at point for a given hexadecimal number."
- (interactive "p")
- (let ((num (hexl-hex-string-to-integer (read-string "Hex number: "))))
- (if (or (> num 255) (< num 0))
- (error "Hex number out of range.")
- (hexl-insert-char num arg))))
-
- (defun hexl-insert-decimal-char (arg)
- "Insert a ASCII char ARG times at point for a given decimal number."
- (interactive "p")
- (let ((num (string-to-int (read-string "Decimal Number: "))))
- (if (or (> num 255) (< num 0))
- (error "Decimal number out of range.")
- (hexl-insert-char num arg))))
-
- (defun hexl-insert-octal-char (arg)
- "Insert a ASCII char ARG times at point for a given octal number."
- (interactive "p")
- (let ((num (hexl-octal-string-to-integer (read-string "Octal Number: "))))
- (if (or (> num 255) (< num 0))
- (error "Decimal number out of range.")
- (hexl-insert-char num arg))))
-
- ;; startup stuff.
-
- (if hexl-mode-map
- nil
- (setq hexl-mode-map (make-sparse-keymap))
-
- (define-key hexl-mode-map [left] 'hexl-backward-char)
- (define-key hexl-mode-map [right] 'hexl-forward-char)
- (define-key hexl-mode-map [up] 'hexl-previous-line)
- (define-key hexl-mode-map [down] 'hexl-next-line)
- (define-key hexl-mode-map [M-left] 'hexl-backward-short)
- (define-key hexl-mode-map [M-right] 'hexl-forward-short)
- (define-key hexl-mode-map [next] 'hexl-scroll-up)
- (define-key hexl-mode-map [prior] 'hexl-scroll-down)
- (define-key hexl-mode-map [home] 'hexl-beginning-of-buffer)
- (define-key hexl-mode-map [deletechar] 'undefined)
- (define-key hexl-mode-map [deleteline] 'undefined)
- (define-key hexl-mode-map [insertline] 'undefined)
- (define-key hexl-mode-map [S-delete] 'undefined)
- (define-key hexl-mode-map "\177" 'undefined)
-
- (define-key hexl-mode-map "\C-a" 'hexl-beginning-of-line)
- (define-key hexl-mode-map "\C-b" 'hexl-backward-char)
- (define-key hexl-mode-map "\C-d" 'undefined)
- (define-key hexl-mode-map "\C-e" 'hexl-end-of-line)
- (define-key hexl-mode-map "\C-f" 'hexl-forward-char)
-
- (if (not (eq (key-binding (char-to-string help-char)) 'help-command))
- (define-key hexl-mode-map (char-to-string help-char) 'undefined))
-
- (define-key hexl-mode-map "\C-i" 'hexl-self-insert-command)
- (define-key hexl-mode-map "\C-j" 'hexl-self-insert-command)
- (define-key hexl-mode-map "\C-k" 'undefined)
- (define-key hexl-mode-map "\C-m" 'hexl-self-insert-command)
- (define-key hexl-mode-map "\C-n" 'hexl-next-line)
- (define-key hexl-mode-map "\C-o" 'undefined)
- (define-key hexl-mode-map "\C-p" 'hexl-previous-line)
- (define-key hexl-mode-map "\C-q" 'hexl-quoted-insert)
- (define-key hexl-mode-map "\C-t" 'undefined)
- (define-key hexl-mode-map "\C-v" 'hexl-scroll-up)
- (define-key hexl-mode-map "\C-w" 'undefined)
- (define-key hexl-mode-map "\C-y" 'undefined)
-
- (let ((ch 32))
- (while (< ch 127)
- (define-key hexl-mode-map (format "%c" ch) 'hexl-self-insert-command)
- (setq ch (1+ ch))))
-
- (define-key hexl-mode-map "\e\C-a" 'hexl-beginning-of-512b-page)
- (define-key hexl-mode-map "\e\C-b" 'hexl-backward-short)
- (define-key hexl-mode-map "\e\C-c" 'undefined)
- (define-key hexl-mode-map "\e\C-d" 'hexl-insert-decimal-char)
- (define-key hexl-mode-map "\e\C-e" 'hexl-end-of-512b-page)
- (define-key hexl-mode-map "\e\C-f" 'hexl-forward-short)
- (define-key hexl-mode-map "\e\C-g" 'undefined)
- (define-key hexl-mode-map "\e\C-h" 'undefined)
- (define-key hexl-mode-map "\e\C-i" 'undefined)
- (define-key hexl-mode-map "\e\C-j" 'undefined)
- (define-key hexl-mode-map "\e\C-k" 'undefined)
- (define-key hexl-mode-map "\e\C-l" 'undefined)
- (define-key hexl-mode-map "\e\C-m" 'undefined)
- (define-key hexl-mode-map "\e\C-n" 'undefined)
- (define-key hexl-mode-map "\e\C-o" 'hexl-insert-octal-char)
- (define-key hexl-mode-map "\e\C-p" 'undefined)
- (define-key hexl-mode-map "\e\C-q" 'undefined)
- (define-key hexl-mode-map "\e\C-r" 'undefined)
- (define-key hexl-mode-map "\e\C-s" 'undefined)
- (define-key hexl-mode-map "\e\C-t" 'undefined)
- (define-key hexl-mode-map "\e\C-u" 'undefined)
-
- (define-key hexl-mode-map "\e\C-w" 'undefined)
- (define-key hexl-mode-map "\e\C-x" 'hexl-insert-hex-char)
- (define-key hexl-mode-map "\e\C-y" 'undefined)
-
- (define-key hexl-mode-map "\ea" 'undefined)
- (define-key hexl-mode-map "\eb" 'hexl-backward-word)
- (define-key hexl-mode-map "\ec" 'undefined)
- (define-key hexl-mode-map "\ed" 'undefined)
- (define-key hexl-mode-map "\ee" 'undefined)
- (define-key hexl-mode-map "\ef" 'hexl-forward-word)
- (define-key hexl-mode-map "\eg" 'hexl-goto-hex-address)
- (define-key hexl-mode-map "\eh" 'undefined)
- (define-key hexl-mode-map "\ei" 'undefined)
- (define-key hexl-mode-map "\ej" 'hexl-goto-address)
- (define-key hexl-mode-map "\ek" 'undefined)
- (define-key hexl-mode-map "\el" 'undefined)
- (define-key hexl-mode-map "\em" 'undefined)
- (define-key hexl-mode-map "\en" 'undefined)
- (define-key hexl-mode-map "\eo" 'undefined)
- (define-key hexl-mode-map "\ep" 'undefined)
- (define-key hexl-mode-map "\eq" 'undefined)
- (define-key hexl-mode-map "\er" 'undefined)
- (define-key hexl-mode-map "\es" 'undefined)
- (define-key hexl-mode-map "\et" 'undefined)
- (define-key hexl-mode-map "\eu" 'undefined)
- (define-key hexl-mode-map "\ev" 'hexl-scroll-down)
- (define-key hexl-mode-map "\ey" 'undefined)
- (define-key hexl-mode-map "\ez" 'undefined)
- (define-key hexl-mode-map "\e<" 'hexl-beginning-of-buffer)
- (define-key hexl-mode-map "\e>" 'hexl-end-of-buffer)
-
- (define-key hexl-mode-map "\C-c\C-c" 'hexl-mode-exit)
-
- (define-key hexl-mode-map "\C-x[" 'hexl-beginning-of-1k-page)
- (define-key hexl-mode-map "\C-x]" 'hexl-end-of-1k-page)
- (define-key hexl-mode-map "\C-x\C-p" 'undefined)
- (define-key hexl-mode-map "\C-x\C-s" 'hexl-save-buffer)
- (define-key hexl-mode-map "\C-x\C-t" 'undefined))
-
- ;;; hexl.el ends here
-