1992-07-16 21:47:34 +00:00
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;;; hexl-mode.el --- edit a file in a hex dump format using the hexl filter.
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1989-10-31 16:00:07 +00:00
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;; Copyright (C) 1989 Free Software Foundation, Inc.
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1992-07-22 04:22:42 +00:00
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;; Author: Keith Gabryelski <ag@wheaties.ai.mit.edu>
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1989-10-31 16:00:07 +00:00
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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1992-07-16 21:47:34 +00:00
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;; the Free Software Foundation; either version 2, or (at your option)
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1989-10-31 16:00:07 +00:00
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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1992-07-16 21:47:34 +00:00
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;;; Commentary:
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1993-03-22 03:27:18 +00:00
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;; This package implements a major mode for editing binary files. It uses
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;; a program called hexl, supplied with the GNU Emacs distribution, that
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;; can filter a binary into an editable format or from the format back into
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;; binary. For full instructions, invoke `hexl-mode' on an empty buffer and
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;; do `M-x describe-mode'.
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;;
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1989-10-31 16:00:07 +00:00
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;; This may be useful in your .emacs:
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;;
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;; (autoload 'hexl-find-file "hexl"
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;; "Edit file FILENAME in hexl-mode." t)
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;;
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;; (define-key global-map "\C-c\C-h" 'hexl-find-file)
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;;
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;; NOTE: Remember to change HEXL-PROGRAM or HEXL-OPTIONS if needed.
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;;
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;; Currently hexl only supports big endian hex output with 16 bit
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;; grouping.
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;;
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;; -iso in `hexl-options' will allow iso characters to display in the
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;; ASCII region of the screen (if your emacs supports this) instead of
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;; changing them to dots.
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1992-07-16 21:47:34 +00:00
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;;; Code:
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1989-10-31 16:00:07 +00:00
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;;
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;; vars here
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;;
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(defvar hexl-program "hexl"
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1991-03-06 18:30:37 +00:00
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"The program that will hexlify and de-hexlify its stdin.
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`hexl-program' will always be concated with `hexl-options'
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and \"-de\" when dehexlfying a buffer.")
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1989-10-31 16:00:07 +00:00
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(defvar hexl-iso ""
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"If your emacs can handle ISO characters, this should be set to
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\"-iso\" otherwise it should be \"\".")
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(defvar hexl-options (format "-hex %s" hexl-iso)
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"Options to hexl-program that suit your needs.")
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(defvar hexlify-command (format "%s %s" hexl-program hexl-options)
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"The command to use to hexlify a buffer. It is the concatination of
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`hexl-program' and `hexl-options'.")
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(defvar dehexlify-command (format "%s -de %s" hexl-program hexl-options)
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"The command to use to unhexlify a buffer. It is the concatination of
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`hexl-program', the option \"-de\", and `hexl-options'.")
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(defvar hexl-max-address 0
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"Maximum offset into hexl buffer.")
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(defvar hexl-mode-map nil)
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;; routines
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1992-06-02 02:33:00 +00:00
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;;;###autoload
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1989-10-31 16:00:07 +00:00
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(defun hexl-mode (&optional arg)
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"\\<hexl-mode-map>
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1993-03-22 03:27:18 +00:00
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A major mode for editing binary files in hex dump format.
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1989-10-31 16:00:07 +00:00
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This function automatically converts a buffer into the hexl format
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using the function `hexlify-buffer'.
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1991-03-06 18:30:37 +00:00
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Each line in the buffer has an \"address\" (displayed in hexadecimal)
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1989-10-31 16:00:07 +00:00
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representing the offset into the file that the characters on this line
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are at and 16 characters from the file (displayed as hexadecimal
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values grouped every 16 bits) and as their ASCII values.
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If any of the characters (displayed as ASCII characters) are
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unprintable (control or meta characters) they will be replaced as
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periods.
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1991-03-06 18:30:37 +00:00
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If `hexl-mode' is invoked with an argument the buffer is assumed to be
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in hexl format.
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1989-10-31 16:00:07 +00:00
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A sample format:
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HEX ADDR: 0001 0203 0405 0607 0809 0a0b 0c0d 0e0f ASCII-TEXT
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-------- ---- ---- ---- ---- ---- ---- ---- ---- ----------------
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00000000: 5468 6973 2069 7320 6865 786c 2d6d 6f64 This is hexl-mod
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00000010: 652e 2020 4561 6368 206c 696e 6520 7265 e. Each line re
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00000020: 7072 6573 656e 7473 2031 3620 6279 7465 presents 16 byte
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00000030: 7320 6173 2068 6578 6164 6563 696d 616c s as hexadecimal
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00000040: 2041 5343 4949 0a61 6e64 2070 7269 6e74 ASCII.and print
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00000050: 6162 6c65 2041 5343 4949 2063 6861 7261 able ASCII chara
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00000060: 6374 6572 732e 2020 416e 7920 636f 6e74 cters. Any cont
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00000070: 726f 6c20 6f72 206e 6f6e 2d41 5343 4949 rol or non-ASCII
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00000080: 2063 6861 7261 6374 6572 730a 6172 6520 characters.are
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00000090: 6469 7370 6c61 7965 6420 6173 2070 6572 displayed as per
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000000a0: 696f 6473 2069 6e20 7468 6520 7072 696e iods in the prin
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000000b0: 7461 626c 6520 6368 6172 6163 7465 7220 table character
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000000c0: 7265 6769 6f6e 2e0a region..
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Movement is as simple as movement in a normal emacs text buffer. Most
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cursor movement bindings are the same (ie. Use \\[hexl-backward-char], \\[hexl-forward-char], \\[hexl-next-line], and \\[hexl-previous-line]
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to move the cursor left, right, down, and up).
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Advanced cursor movement commands (ala \\[hexl-beginning-of-line], \\[hexl-end-of-line], \\[hexl-beginning-of-buffer], and \\[hexl-end-of-buffer]) are
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also supported.
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There are several ways to change text in hexl mode:
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ASCII characters (character between space (0x20) and tilde (0x7E)) are
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bound to self-insert so you can simply type the character and it will
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insert itself (actually overstrike) into the buffer.
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\\[hexl-quoted-insert] followed by another keystroke allows you to insert the key even if
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it isn't bound to self-insert. An octal number can be supplied in place
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of another key to insert the octal number's ASCII representation.
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\\[hexl-insert-hex-char] will insert a given hexadecimal value (if it is between 0 and 0xFF)
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into the buffer at the current point.
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\\[hexl-insert-octal-char] will insert a given octal value (if it is between 0 and 0377)
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into the buffer at the current point.
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\\[hexl-insert-decimal-char] will insert a given decimal value (if it is between 0 and 255)
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into the buffer at the current point.
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\\[hexl-mode-exit] will exit hexl-mode.
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1992-06-02 02:33:00 +00:00
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Note: saving the file with any of the usual Emacs commands
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will actually convert it back to binary format while saving.
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1989-10-31 16:00:07 +00:00
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You can use \\[hexl-find-file] to visit a file in hexl-mode.
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\\[describe-bindings] for advanced commands."
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(interactive "p")
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(if (eq major-mode 'hexl-mode)
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(error "You are already in hexl mode.")
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(kill-all-local-variables)
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(make-local-variable 'hexl-mode-old-local-map)
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(setq hexl-mode-old-local-map (current-local-map))
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(use-local-map hexl-mode-map)
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(make-local-variable 'hexl-mode-old-mode-name)
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(setq hexl-mode-old-mode-name mode-name)
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(setq mode-name "Hexl")
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(make-local-variable 'hexl-mode-old-major-mode)
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(setq hexl-mode-old-major-mode major-mode)
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(setq major-mode 'hexl-mode)
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1992-06-02 02:33:00 +00:00
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(make-local-variable 'write-contents-hooks)
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(setq write-contents-hooks
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(cons 'hexl-save-buffer write-contents-hooks))
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1989-10-31 16:00:07 +00:00
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(let ((modified (buffer-modified-p))
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(read-only buffer-read-only)
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(original-point (1- (point))))
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(if (not (or (eq arg 1) (not arg)))
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;; if no argument then we guess at hexl-max-address
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(setq hexl-max-address (+ (* (/ (1- (buffer-size)) 68) 16) 15))
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(setq buffer-read-only nil)
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(setq hexl-max-address (1- (buffer-size)))
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(hexlify-buffer)
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(set-buffer-modified-p modified)
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(setq buffer-read-only read-only)
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(hexl-goto-address original-point)))))
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(defun hexl-save-buffer ()
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"Save a hexl format buffer as binary in visited file if modified."
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(interactive)
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(set-buffer-modified-p (if (buffer-modified-p)
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(save-excursion
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(let ((buf (generate-new-buffer " hexl"))
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(name (buffer-name))
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(file-name (buffer-file-name))
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(start (point-min))
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(end (point-max))
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modified)
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(set-buffer buf)
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(insert-buffer-substring name start end)
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(set-buffer name)
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(dehexlify-buffer)
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(save-buffer)
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(setq modified (buffer-modified-p))
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(delete-region (point-min) (point-max))
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(insert-buffer-substring buf start end)
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(kill-buffer buf)
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modified))
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(message "(No changes need to be saved)")
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1992-06-02 02:33:00 +00:00
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nil))
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;; Return t to indicate we have saved t
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t)
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1989-10-31 16:00:07 +00:00
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1992-06-02 02:33:00 +00:00
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;;;###autoload
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1989-10-31 16:00:07 +00:00
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(defun hexl-find-file (filename)
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"Edit file FILENAME in hexl-mode.
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Switch to a buffer visiting file FILENAME, creating one in none exists."
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(interactive "fFilename: ")
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(find-file filename)
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(if (not (eq major-mode 'hexl-mode))
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(hexl-mode)))
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(defun hexl-mode-exit (&optional arg)
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1992-06-02 02:33:00 +00:00
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"Exit Hexl mode, returning to previous mode.
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1989-10-31 16:00:07 +00:00
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With arg, don't unhexlify buffer."
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(interactive "p")
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(if (or (eq arg 1) (not arg))
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(let ((modified (buffer-modified-p))
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(read-only buffer-read-only)
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(original-point (1+ (hexl-current-address))))
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(setq buffer-read-only nil)
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(dehexlify-buffer)
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(set-buffer-modified-p modified)
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(setq buffer-read-only read-only)
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(goto-char original-point)))
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(setq mode-name hexl-mode-old-mode-name)
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(use-local-map hexl-mode-old-local-map)
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(setq major-mode hexl-mode-old-major-mode)
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;; Kludge to update mode-line
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(switch-to-buffer (current-buffer))
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)
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(defun hexl-current-address ()
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"Return current hexl-address."
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(interactive)
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(let ((current-column (- (% (point) 68) 11))
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(hexl-address 0))
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(setq hexl-address (+ (* (/ (point) 68) 16)
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(/ (- current-column (/ current-column 5)) 2)))
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hexl-address))
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(defun hexl-address-to-marker (address)
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"Return marker for ADDRESS."
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(interactive "nAddress: ")
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(+ (* (/ address 16) 68) 11 (/ (* (% address 16) 5) 2)))
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(defun hexl-goto-address (address)
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"Goto hexl-mode (decimal) address ADDRESS.
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Signal error if ADDRESS out of range."
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(interactive "nAddress: ")
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(if (or (< address 0) (> address hexl-max-address))
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(error "Out of hexl region."))
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(goto-char (hexl-address-to-marker address)))
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(defun hexl-goto-hex-address (hex-address)
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1991-03-06 18:33:25 +00:00
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"Go to hexl-mode address (hex string) HEX-ADDRESS.
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1989-10-31 16:00:07 +00:00
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Signal error if HEX-ADDRESS is out of range."
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(interactive "sHex Address: ")
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(hexl-goto-address (hexl-hex-string-to-integer hex-address)))
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(defun hexl-hex-string-to-integer (hex-string)
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"Return decimal integer for HEX-STRING."
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(interactive "sHex number: ")
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(let ((hex-num 0))
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(while (not (equal hex-string ""))
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(setq hex-num (+ (* hex-num 16)
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(hexl-hex-char-to-integer (string-to-char hex-string))))
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(setq hex-string (substring hex-string 1)))
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hex-num))
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(defun hexl-octal-string-to-integer (octal-string)
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"Return decimal integer for OCTAL-STRING."
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(interactive "sOctal number: ")
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(let ((oct-num 0))
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(while (not (equal octal-string ""))
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|
(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)
|
1991-03-06 18:33:25 +00:00
|
|
|
"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."
|
1989-10-31 16:00:07 +00:00
|
|
|
(interactive "p")
|
|
|
|
|
(hexl-next-line (- arg)))
|
|
|
|
|
|
|
|
|
|
(defun hexl-next-line (arg)
|
1991-03-06 18:33:25 +00:00
|
|
|
"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."
|
1989-10-31 16:00:07 +00:00
|
|
|
(interactive "p")
|
1992-08-04 04:15:43 +00:00
|
|
|
(hexl-goto-address (let ((address (+ (hexl-current-address) (* arg 16))))
|
1989-10-31 16:00:07 +00:00
|
|
|
(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)
|
1991-03-06 18:33:25 +00:00
|
|
|
"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."
|
1989-10-31 16:00:07 +00:00
|
|
|
(interactive "p")
|
|
|
|
|
(push-mark (point))
|
|
|
|
|
(hexl-goto-address (+ 0 (1- arg))))
|
|
|
|
|
|
|
|
|
|
(defun hexl-end-of-buffer (arg)
|
1991-03-06 18:33:25 +00:00
|
|
|
"Go to `hexl-max-address' minus ARG."
|
1989-10-31 16:00:07 +00:00
|
|
|
(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 ()
|
|
|
|
|
"Goto to beginning of 1k boundry."
|
|
|
|
|
(interactive)
|
|
|
|
|
(hexl-goto-address (logand (hexl-current-address) -1024)))
|
|
|
|
|
|
|
|
|
|
(defun hexl-end-of-1k-page ()
|
|
|
|
|
"Goto to end of 1k boundry."
|
|
|
|
|
(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 ()
|
|
|
|
|
"Goto to beginning of 512 byte boundry."
|
|
|
|
|
(interactive)
|
|
|
|
|
(hexl-goto-address (logand (hexl-current-address) -512)))
|
|
|
|
|
|
|
|
|
|
(defun hexl-end-of-512b-page ()
|
|
|
|
|
"Goto to end of 512 byte boundry."
|
|
|
|
|
(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
|
|
|
|
|
|
|
|
|
|
(defun hexlify-buffer ()
|
|
|
|
|
"Convert a binary buffer to hexl format"
|
|
|
|
|
(interactive)
|
|
|
|
|
(shell-command-on-region (point-min) (point-max) hexlify-command t))
|
|
|
|
|
|
|
|
|
|
(defun dehexlify-buffer ()
|
|
|
|
|
"Convert a hexl format buffer to binary."
|
|
|
|
|
(interactive)
|
|
|
|
|
(shell-command-on-region (point-min) (point-max) dehexlify-command t))
|
|
|
|
|
|
|
|
|
|
(defun hexl-char-after-point ()
|
|
|
|
|
"Return char for ASCII hex digits at point."
|
|
|
|
|
(setq lh (char-after (point)))
|
|
|
|
|
(setq rh (char-after (1+ (point))))
|
|
|
|
|
(hexl-htoi lh rh))
|
|
|
|
|
|
|
|
|
|
(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 (format "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))))
|
|
|
|
|
|
|
|
|
|
(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)))
|
|
|
|
|
(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))
|
|
|
|
|
(if (eq address hexl-max-address)
|
|
|
|
|
(hexl-goto-address address)
|
|
|
|
|
(hexl-goto-address (1+ address)))
|
|
|
|
|
(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 "\C-a" 'hexl-beginning-of-line)
|
|
|
|
|
(define-key hexl-mode-map "\C-b" 'hexl-backward-char)
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(define-key hexl-mode-map "\C-d" 'undefined)
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(define-key hexl-mode-map "\C-e" 'hexl-end-of-line)
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(define-key hexl-mode-map "\C-f" 'hexl-forward-char)
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1993-03-02 07:26:43 +00:00
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(if (not (eq (key-binding (char-to-string help-char)) 'help-command))
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1992-08-03 21:49:55 +00:00
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(define-key hexl-mode-map help-char 'undefined))
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1989-10-31 16:00:07 +00:00
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(define-key hexl-mode-map "\C-i" 'hexl-self-insert-command)
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(define-key hexl-mode-map "\C-j" 'hexl-self-insert-command)
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(define-key hexl-mode-map "\C-k" 'undefined)
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(define-key hexl-mode-map "\C-m" 'hexl-self-insert-command)
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(define-key hexl-mode-map "\C-n" 'hexl-next-line)
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(define-key hexl-mode-map "\C-o" 'undefined)
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(define-key hexl-mode-map "\C-p" 'hexl-previous-line)
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(define-key hexl-mode-map "\C-q" 'hexl-quoted-insert)
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(define-key hexl-mode-map "\C-t" 'undefined)
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(define-key hexl-mode-map "\C-v" 'hexl-scroll-up)
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(define-key hexl-mode-map "\C-w" 'undefined)
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(define-key hexl-mode-map "\C-y" 'undefined)
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(let ((ch 32))
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(while (< ch 127)
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(define-key hexl-mode-map (format "%c" ch) 'hexl-self-insert-command)
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(setq ch (1+ ch))))
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(define-key hexl-mode-map "\e\C-a" 'hexl-beginning-of-512b-page)
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(define-key hexl-mode-map "\e\C-b" 'hexl-backward-short)
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(define-key hexl-mode-map "\e\C-c" 'undefined)
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(define-key hexl-mode-map "\e\C-d" 'hexl-insert-decimal-char)
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(define-key hexl-mode-map "\e\C-e" 'hexl-end-of-512b-page)
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(define-key hexl-mode-map "\e\C-f" 'hexl-forward-short)
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(define-key hexl-mode-map "\e\C-g" 'undefined)
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(define-key hexl-mode-map "\e\C-h" 'undefined)
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(define-key hexl-mode-map "\e\C-i" 'undefined)
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(define-key hexl-mode-map "\e\C-j" 'undefined)
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(define-key hexl-mode-map "\e\C-k" 'undefined)
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(define-key hexl-mode-map "\e\C-l" 'undefined)
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(define-key hexl-mode-map "\e\C-m" 'undefined)
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(define-key hexl-mode-map "\e\C-n" 'undefined)
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(define-key hexl-mode-map "\e\C-o" 'hexl-insert-octal-char)
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(define-key hexl-mode-map "\e\C-p" 'undefined)
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(define-key hexl-mode-map "\e\C-q" 'undefined)
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(define-key hexl-mode-map "\e\C-r" 'undefined)
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(define-key hexl-mode-map "\e\C-s" 'undefined)
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(define-key hexl-mode-map "\e\C-t" 'undefined)
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(define-key hexl-mode-map "\e\C-u" 'undefined)
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(define-key hexl-mode-map "\e\C-w" 'undefined)
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(define-key hexl-mode-map "\e\C-x" 'hexl-insert-hex-char)
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(define-key hexl-mode-map "\e\C-y" 'undefined)
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1992-06-02 02:33:00 +00:00
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(define-key hexl-mode-map "\ea" 'undefined)
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1989-10-31 16:00:07 +00:00
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(define-key hexl-mode-map "\eb" 'hexl-backward-word)
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(define-key hexl-mode-map "\ec" 'undefined)
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(define-key hexl-mode-map "\ed" 'undefined)
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1992-06-02 02:33:00 +00:00
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(define-key hexl-mode-map "\ee" 'undefined)
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1989-10-31 16:00:07 +00:00
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(define-key hexl-mode-map "\ef" 'hexl-forward-word)
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(define-key hexl-mode-map "\eg" 'hexl-goto-hex-address)
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(define-key hexl-mode-map "\eh" 'undefined)
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(define-key hexl-mode-map "\ei" 'undefined)
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(define-key hexl-mode-map "\ej" 'hexl-goto-address)
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(define-key hexl-mode-map "\ek" 'undefined)
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(define-key hexl-mode-map "\el" 'undefined)
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(define-key hexl-mode-map "\em" 'undefined)
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(define-key hexl-mode-map "\en" 'undefined)
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(define-key hexl-mode-map "\eo" 'undefined)
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(define-key hexl-mode-map "\ep" 'undefined)
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(define-key hexl-mode-map "\eq" 'undefined)
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(define-key hexl-mode-map "\er" 'undefined)
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(define-key hexl-mode-map "\es" 'undefined)
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(define-key hexl-mode-map "\et" 'undefined)
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(define-key hexl-mode-map "\eu" 'undefined)
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(define-key hexl-mode-map "\ev" 'hexl-scroll-down)
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(define-key hexl-mode-map "\ey" 'undefined)
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(define-key hexl-mode-map "\ez" 'undefined)
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(define-key hexl-mode-map "\e<" 'hexl-beginning-of-buffer)
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(define-key hexl-mode-map "\e>" 'hexl-end-of-buffer)
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(define-key hexl-mode-map "\C-c\C-c" 'hexl-mode-exit)
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1992-06-02 02:33:00 +00:00
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(define-key hexl-mode-map "\C-x[" 'hexl-beginning-of-1k-page)
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(define-key hexl-mode-map "\C-x]" 'hexl-end-of-1k-page)
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1989-10-31 16:00:07 +00:00
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(define-key hexl-mode-map "\C-x\C-p" 'undefined)
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(define-key hexl-mode-map "\C-x\C-s" 'hexl-save-buffer)
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(define-key hexl-mode-map "\C-x\C-t" 'undefined))
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1992-05-30 23:12:08 +00:00
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;;; hexl.el ends here
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