-;;; hexl.el --- edit a file in a hex dump format using the hexl filter.
+;;; hexl.el --- edit a file in a hex dump format using the hexl filter
-;; Copyright (C) 1989, 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1989, 1994, 1998, 2001 Free Software Foundation, Inc.
;; Author: Keith Gabryelski <ag@wheaties.ai.mit.edu>
;; Maintainer: FSF
;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; 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:
;; 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'.
+;; 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.
+;; NOTE: Remember to change `hexl-program' or `hexl-options' if needed.
;;
;; Currently hexl only supports big endian hex output with 16 bit
;; grouping.
;; vars here
;;
-(defvar hexl-program "hexl"
- "The program that will hexlify and de-hexlify its stdin.
-`hexl-program' will always be concatenated with `hexl-options'
-and \"-de\" when dehexlfying a buffer.")
-
-(defvar hexl-iso ""
- "If your emacs can handle ISO characters, this should be set to
-\"-iso\" otherwise it should be \"\".")
+(defgroup hexl nil
+ "Edit a file in a hex dump format using the hexl filter."
+ :group 'data)
-(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.")
+(defcustom 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."
+ :type 'string
+ :group 'hexl)
-(defvar dehexlify-command
- (format "%s%s -de %s" exec-directory hexl-program hexl-options)
- "The command to use to unhexlify a buffer.")
+(defcustom hexl-iso ""
+ "If your emacs can handle ISO characters, this should be set to
+\"-iso\" otherwise it should be \"\"."
+ :type 'string
+ :group 'hexl)
+
+(defcustom hexl-options (format "-hex %s" hexl-iso)
+ "Space separated options to `hexl-program' that suit your needs.
+Quoting cannot be used, so the arguments cannot themselves contain spaces."
+ :type 'string
+ :group 'hexl)
+
+(defcustom hexl-follow-ascii t
+ "If non-nil then highlight the ASCII character corresponding to point."
+ :type 'boolean
+ :group 'hexl
+ :version "20.3")
(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)
+
+(defvar hexl-ascii-overlay nil
+ "Overlay used to highlight ASCII element corresponding to current point.")
+(make-variable-buffer-local 'hexl-ascii-overlay)
+
;; routines
+(put 'hexl-mode 'mode-class 'special)
+
;;;###autoload
(defun hexl-mode (&optional arg)
- "\\<hexl-mode-map>
-A major mode for editing binary files in hex dump format.
+ "\\<hexl-mode-map>A mode for editing binary files in hex dump format.
+This is not an ordinary major mode; it alters some aspects
+if the current mode's behavior, but not all; also, you can exit
+Hexl mode and return to the previous mode using `hexl-mode-exit'.
This function automatically converts a buffer into the hexl format
using the function `hexlify-buffer'.
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.
+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.")
- (kill-all-local-variables)
+ (unless (eq major-mode '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)))
+ ;; If the buffer's EOL type is -dos, we need to account for
+ ;; extra CR characters added when hexlify-buffer writes the
+ ;; buffer to a file.
+ (when (eq (coding-system-eol-type buffer-file-coding-system) 1)
+ (setq max-address (+ (count-lines (point-min) (point-max))
+ max-address))
+ ;; But if there's no newline at the last line, we are off by
+ ;; one; adjust.
+ (or (eq (char-before (point-max)) ?\n)
+ (setq max-address (1- max-address)))
+ (setq original-point (+ (count-lines (point-min) (point))
+ original-point))
+ (or (bolp) (setq original-point (1- original-point))))
+ (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)
(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-max-address)
+ (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)
- (make-local-variable 'change-major-mode-hook)
- (add-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer)
+ ;; Add hooks to rehexlify or dehexlify on various events.
+ (add-hook 'after-revert-hook 'hexl-after-revert-hook nil t)
- (let ((modified (buffer-modified-p))
- (inhibit-read-only t)
- (original-point (1- (point))))
- (if (not (or (eq arg 1) (not arg)))
- ;; if no argument then we guess at hexl-max-address
- (setq hexl-max-address (+ (* (/ (1- (buffer-size)) 68) 16) 15))
- (setq hexl-max-address (1- (buffer-size)))
- (hexlify-buffer)
- (set-buffer-modified-p modified)
- (hexl-goto-address original-point)))))
+ (add-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer nil t)
+
+ (if hexl-follow-ascii (hexl-follow-ascii 1)))
+ (run-hooks 'hexl-mode-hook))
+
+(defun hexl-after-revert-hook ()
+ (setq hexl-max-address (1- (buffer-size)))
+ (hexlify-buffer)
+ (set-buffer-modified-p nil))
(defvar hexl-in-save-buffer nil)
(set-buffer name)
(dehexlify-buffer)
;; Prevent infinite recursion.
- (let ((hexl-in-save-buffer t)
- (buffer-file-type t)) ; for ms-dos
+ (let ((hexl-in-save-buffer t))
(save-buffer))
(setq modified (buffer-modified-p))
(delete-region (point-min) (point-max))
"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))
+ (find-file-literally filename)
(if (not (eq major-mode 'hexl-mode))
(hexl-mode)))
(inhibit-read-only t)
(original-point (1+ (hexl-current-address))))
(dehexlify-buffer)
- (remove-hook 'write-contents-hook 'hexl-save-buffer)
+ (remove-hook 'write-contents-hooks 'hexl-save-buffer)
(set-buffer-modified-p modified)
+ (goto-char original-point)
+ ;; Maybe adjust point for the removed CR characters.
+ (when (eq (coding-system-eol-type buffer-file-coding-system) 1)
+ (setq original-point (- original-point
+ (count-lines (point-min) (point))))
+ (or (bobp) (setq original-point (1+ original-point))))
(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)
+ (remove-hook 'post-command-hook 'hexl-follow-ascii-find t)
+ (setq hexl-ascii-overlay nil)
+
+ (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))
(inhibit-read-only t)
(original-point (1+ (hexl-current-address))))
(dehexlify-buffer)
- (remove-hook 'write-contents-hook 'hexl-save-buffer)
+ (remove-hook 'write-contents-hooks 'hexl-save-buffer)
(set-buffer-modified-p modified)
(goto-char original-point))))
-(defun hexl-current-address ()
+(defun hexl-current-address (&optional validate)
"Return current hexl-address."
(interactive)
- (let ((current-column (- (% (point) 68) 11))
+ (let ((current-column (- (% (point) 68) 11))
(hexl-address 0))
- (setq hexl-address (+ (* (/ (point) 68) 16)
- (/ (- current-column (/ current-column 5)) 2)))
+ (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))))
+ (when (interactive-p)
+ (message "Current address is %d" hexl-address))
hexl-address))
(defun hexl-address-to-marker (address)
- "Return marker for ADDRESS."
+ "Return buffer position 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."))
+ (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)))
(hexl-scroll-up (- arg)))
(defun hexl-scroll-up (arg)
- "Scroll hexl buffer window upward ARG lines; or near full window if no ARG."
+ "Scroll hexl buffer window upward ARG lines; or near full window if no ARG.
+If there's no byte at the target address, move to the first or last line."
(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))))
+ (let* ((movement (* arg 16))
+ (address (hexl-current-address))
+ (dest (+ address movement)))
+ (cond
+ ;; If possible, try to stay at the same offset from the beginning
+ ;; of the 16-byte group, even if we move to the first or last
+ ;; group.
+ ((and (> dest hexl-max-address)
+ (>= (% hexl-max-address 16) (% address 16)))
+ (setq dest (+ (logand hexl-max-address -16) (% address 16))))
+ ((> dest hexl-max-address)
+ (setq dest hexl-max-address))
+ ((< dest 0)
+ (setq dest (% address 16))))
+ (if (/= dest (+ address movement))
+ (message "Out of hexl region."))
+ (hexl-goto-address dest)
+ (recenter 0)))
(defun hexl-beginning-of-1k-page ()
- "Goto to beginning of 1k boundry."
+ "Go to beginning of 1k boundary."
(interactive)
(hexl-goto-address (logand (hexl-current-address) -1024)))
(defun hexl-end-of-1k-page ()
- "Goto to end of 1k boundry."
+ "Go to end of 1k boundary."
(interactive)
(hexl-goto-address (let ((address (logior (hexl-current-address) 1023)))
(if (> address hexl-max-address)
address)))
(defun hexl-beginning-of-512b-page ()
- "Goto to beginning of 512 byte boundry."
+ "Go to beginning of 512 byte boundary."
(interactive)
(hexl-goto-address (logand (hexl-current-address) -512)))
(defun hexl-end-of-512b-page ()
- "Goto to end of 512 byte boundry."
+ "Go to end of 512 byte boundary."
(interactive)
(hexl-goto-address (let ((address (logior (hexl-current-address) 511)))
(if (> address hexl-max-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"
+Useful for inserting control characters and non-ASCII characters given their
+numerical code.
+You may also type octal digits, to insert a character with that code."
(interactive "p")
- (hexl-insert-char (read-quoted-char) arg))
+ (hexl-insert-multibyte-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."
+ "Convert a binary buffer to hexl format.
+This discards the buffer's undo information."
(interactive)
- (let ((binary-process-output nil) ; for Ms-Dos
- (binary-process-input t))
- (shell-command-on-region (point-min) (point-max) hexlify-command t)))
+ (and buffer-undo-list
+ (or (y-or-n-p "Converting to hexl format discards undo info; ok? ")
+ (error "Aborted")))
+ (setq buffer-undo-list nil)
+ ;; Don't decode text in the ASCII part of `hexl' program output.
+ (let ((coding-system-for-read 'raw-text)
+ (coding-system-for-write buffer-file-coding-system)
+ (buffer-undo-list t))
+ (apply 'call-process-region (point-min) (point-max)
+ (expand-file-name hexl-program exec-directory)
+ t t nil (split-string hexl-options))
+ (if (> (point) (hexl-address-to-marker hexl-max-address))
+ (hexl-goto-address hexl-max-address))))
(defun dehexlify-buffer ()
- "Convert a hexl format buffer to binary."
+ "Convert a hexl format buffer to binary.
+This discards the buffer's undo information."
(interactive)
- (let ((binary-process-output t) ; for Ms-Dos
- (binary-process-input nil))
- (shell-command-on-region (point-min) (point-max) dehexlify-command t)))
+ (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 ((coding-system-for-write 'raw-text)
+ (coding-system-for-read buffer-file-coding-system)
+ (buffer-undo-list t))
+ (apply 'call-process-region (point-min) (point-max)
+ (expand-file-name hexl-program exec-directory)
+ t t nil "-de" (split-string hexl-options))))
(defun hexl-char-after-point ()
"Return char for ASCII hex digits at point."
(let ((ch (logior character 32)))
(if (and (>= ch ?a) (<= ch ?f))
(- ch (- ?a 10))
- (error (format "Invalid hex digit `%c'." ch))))))
+ (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 (format "Invalid octal digit `%c'." character))))
+ (error "Invalid octal digit `%c'" character)))
(defun hexl-printable-character (ch)
"Return a displayable string for character CH."
46
ch))))
+(defun hexl-insert-multibyte-char (ch num)
+ "Insert a possibly multibyte character CH NUM times.
+
+Non-ASCII characters are first encoded with `buffer-file-coding-system',
+and their encoded form is inserted byte by byte."
+ (let ((charset (char-charset ch))
+ (coding (if (or (null buffer-file-coding-system)
+ ;; coding-system-type equals t means undecided.
+ (eq (coding-system-type buffer-file-coding-system) t))
+ default-buffer-file-coding-system
+ buffer-file-coding-system)))
+ (cond ((and (> ch 0) (< ch 256))
+ (hexl-insert-char ch num))
+ ((eq charset 'unknown)
+ (error
+ "0x%x -- invalid character code; use \\[hexl-insert-hex-string]"
+ ch))
+ (t
+ (let ((encoded (encode-coding-char ch coding))
+ (internal (string-as-unibyte (char-to-string ch)))
+ internal-hex)
+ ;; If encode-coding-char returns nil, it means our character
+ ;; cannot be safely encoded with buffer-file-coding-system.
+ ;; In that case, we offer to insert the internal representation
+ ;; of that character, byte by byte.
+ (when (null encoded)
+ (setq internal-hex
+ (mapconcat (function (lambda (c) (format "%x" c)))
+ internal " "))
+ (if (yes-or-no-p
+ (format
+ "Insert char 0x%x's internal representation \"%s\"? "
+ ch internal-hex))
+ (setq encoded internal)
+ (error
+ "Can't encode `0x%x' with this buffer's coding system; try \\[hexl-insert-hex-string]"
+ ch)))
+ (while (> num 0)
+ (mapc
+ (function (lambda (c) (hexl-insert-char c 1))) encoded)
+ (setq num (1- num))))))))
+
(defun hexl-self-insert-command (arg)
- "Insert this character."
+ "Insert this character.
+Interactively, with a numeric argument, insert this character that many times.
+
+Non-ASCII characters are first encoded with `buffer-file-coding-system',
+and their encoded form is inserted byte by byte."
(interactive "p")
- (hexl-insert-char last-command-char arg))
+ (hexl-insert-multibyte-char last-command-char arg))
(defun hexl-insert-char (ch num)
- "Insert a character in a hexl buffer."
- (let ((address (hexl-current-address)))
+ "Insert the character CH NUM times in a hexl buffer.
+
+CH must be a unibyte character whose value is between 0 and 255."
+ (if (or (< ch 0) (> ch 255))
+ (error "Invalid character 0x%x -- must be in the range [0..255]"))
+ (let ((address (hexl-current-address t)))
(while (> num 0)
- (delete-char 2)
- (insert (format "%02x" ch))
- (goto-char
- (+ (* (/ address 16) 68) 52 (% address 16)))
- (delete-char 1)
- (insert (hexl-printable-character ch))
- (or (eq address hexl-max-address)
- (setq address (1+ address)))
- (hexl-goto-address address)
+ (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."
+ "Insert a character given by its hexadecimal code ARG times at point."
(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))))
+ (if (< num 0)
+ (error "Hex number out of range")
+ (hexl-insert-multibyte-char num arg))))
+
+(defun hexl-insert-hex-string (str arg)
+ "Insert hexadecimal string STR at point ARG times.
+Embedded whitespace, dashes, and periods in the string are ignored."
+ (interactive "sHex string: \np")
+ (setq str (replace-regexp-in-string "[- \t.]" "" str))
+ (let ((chars '()))
+ (let ((len (length str))
+ (idx 0))
+ (if (eq (logand len 1) 1)
+ (let ((num (hexl-hex-string-to-integer (substring str 0 1))))
+ (setq chars (cons num chars))
+ (setq idx 1)))
+ (while (< idx len)
+ (let* ((nidx (+ idx 2))
+ (num (hexl-hex-string-to-integer (substring str idx nidx))))
+ (setq chars (cons num chars))
+ (setq idx nidx))))
+ (setq chars (nreverse chars))
+ (while (> arg 0)
+ (let ((chars chars))
+ (while chars
+ (hexl-insert-char (car chars) 1)
+ (setq chars (cdr chars))))
+ (setq arg (- arg 1)))))
(defun hexl-insert-decimal-char (arg)
- "Insert a ASCII char ARG times at point for a given decimal number."
+ "Insert a character given by its decimal code ARG times at point."
(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))))
+ (if (< num 0)
+ (error "Decimal number out of range")
+ (hexl-insert-multibyte-char num arg))))
(defun hexl-insert-octal-char (arg)
- "Insert a ASCII char ARG times at point for a given octal number."
+ "Insert a character given by its octal code ARG times at point."
(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))))
+ (if (< num 0)
+ (error "Decimal number out of range")
+ (hexl-insert-multibyte-char num arg))))
+
+(defun hexl-follow-ascii (&optional arg)
+ "Toggle following ASCII in Hexl buffers.
+With prefix ARG, turn on following if and only if ARG is positive.
+When following is enabled, the ASCII character corresponding to the
+element under the point is highlighted.
+Customize the variable `hexl-follow-ascii' to disable this feature."
+ (interactive "P")
+ (let ((on-p (if arg
+ (> (prefix-numeric-value arg) 0)
+ (not hexl-ascii-overlay))))
+
+ (if on-p
+ ;; turn it on
+ (if (not hexl-ascii-overlay)
+ (progn
+ (setq hexl-ascii-overlay (make-overlay 1 1)
+ hexl-follow-ascii t)
+ (overlay-put hexl-ascii-overlay 'face 'highlight)
+ (add-hook 'post-command-hook 'hexl-follow-ascii-find nil t)))
+ ;; turn it off
+ (if hexl-ascii-overlay
+ (progn
+ (delete-overlay hexl-ascii-overlay)
+ (setq hexl-ascii-overlay nil
+ hexl-follow-ascii nil)
+ (remove-hook 'post-command-hook 'hexl-follow-ascii-find t)
+ )))))
+
+(defun hexl-follow-ascii-find ()
+ "Find and highlight the ASCII element corresponding to current point."
+ (let ((pos (+ 51
+ (- (point) (current-column))
+ (mod (hexl-current-address) 16))))
+ (move-overlay hexl-ascii-overlay pos (1+ pos))
+ ))
;; 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 [prev] 'hexl-scroll-down)
-
- (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))
+ (setq hexl-mode-map (make-keymap))
+ ;; Make all self-inserting keys go through hexl-self-insert-command,
+ ;; because we need to convert them to unibyte characters before
+ ;; inserting them into the buffer.
+ (substitute-key-definition 'self-insert-command 'hexl-self-insert-command
+ hexl-mode-map (current-global-map))
+
+ (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-line)
+ (define-key hexl-mode-map [end] 'hexl-end-of-line)
+ (define-key hexl-mode-map [C-home] 'hexl-beginning-of-buffer)
+ (define-key hexl-mode-map [C-end] 'hexl-end-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-k" 'undefined)
+ (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)
+
+ (fset 'hexl-ESC-prefix (copy-keymap 'ESC-prefix))
+ (define-key hexl-mode-map "\e" 'hexl-ESC-prefix)
+ (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-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-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-o" 'hexl-insert-octal-char)
+ (define-key hexl-mode-map "\e\C-q" 'undefined)
+ (define-key hexl-mode-map "\e\C-t" 'undefined)
+ (define-key hexl-mode-map "\e\C-x" 'hexl-insert-hex-char)
+ (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 "\ef" 'hexl-forward-word)
+ (define-key hexl-mode-map "\eg" 'hexl-goto-hex-address)
+ (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 "\eq" '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)
+
+ (fset 'hexl-C-c-prefix (copy-keymap mode-specific-map))
+ (define-key hexl-mode-map "\C-c" 'hexl-C-c-prefix)
+ (define-key hexl-mode-map "\C-c\C-c" 'hexl-mode-exit)
+
+ (fset 'hexl-C-x-prefix (copy-keymap 'Control-X-prefix))
+ (define-key hexl-mode-map "\C-x" 'hexl-C-x-prefix)
+ (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))
+
+(provide 'hexl)
;;; hexl.el ends here
HCoop / bpt / emacs.git / blobdiff