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1048 lines
37 KiB
EmacsLisp
1048 lines
37 KiB
EmacsLisp
;;; hexl.el --- edit a file in a hex dump format using the hexl filter
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;; Copyright (C) 1989, 1994, 1998, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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;; Author: Keith Gabryelski <ag@wheaties.ai.mit.edu>
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;; Maintainer: FSF
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;; Keywords: data
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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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;; the Free Software Foundation; either version 2, or (at your option)
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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 the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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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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;; 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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;;; Code:
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(require 'eldoc)
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;;
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;; vars here
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;;
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(defgroup hexl nil
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"Edit a file in a hex dump format using the hexl filter."
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:group 'data)
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(defcustom hexl-program "hexl"
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"The program that will hexlify and dehexlify its stdin.
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`hexl-program' will always be concatenated with `hexl-options'
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and \"-de\" when dehexlifying a buffer."
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:type 'string
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:group 'hexl)
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(defcustom 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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:type 'string
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:group 'hexl)
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(defcustom hexl-options (format "-hex %s" hexl-iso)
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"Space separated options to `hexl-program' that suit your needs.
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Quoting cannot be used, so the arguments cannot themselves contain spaces."
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:type 'string
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:group 'hexl)
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(defcustom hexl-follow-ascii t
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"If non-nil then highlight the ASCII character corresponding to point."
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:type 'boolean
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:group 'hexl
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:version "20.3")
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(defcustom hexl-mode-hook '(hexl-follow-line hexl-activate-ruler)
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"Normal hook run when entering Hexl mode."
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:type 'hook
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:options '(hexl-follow-line hexl-activate-ruler turn-on-eldoc-mode)
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:group 'hexl)
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(defface hexl-address-area
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'((t (:inherit header-line)))
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"Face used in address are of hexl-mode buffer."
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:group 'hexl)
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(defface hexl-ascii-area
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'((t (:inherit header-line)))
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"Face used in ascii are of hexl-mode buffer."
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:group 'hexl)
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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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(defvar hexl-mode-old-local-map)
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(defvar hexl-mode-old-mode-name)
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(defvar hexl-mode-old-major-mode)
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(defvar hexl-mode-old-isearch-search-fun-function)
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(defvar hexl-mode-old-require-final-newline)
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(defvar hexl-mode-old-syntax-table)
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(defvar hexl-ascii-overlay nil
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"Overlay used to highlight ASCII element corresponding to current point.")
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(make-variable-buffer-local 'hexl-ascii-overlay)
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;; routines
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(put 'hexl-mode 'mode-class 'special)
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;;;###autoload
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(defun hexl-mode (&optional arg)
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"\\<hexl-mode-map>A mode for editing binary files in hex dump format.
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This is not an ordinary major mode; it alters some aspects
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of the current mode's behavior, but not all; also, you can exit
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Hexl mode and return to the previous mode using `hexl-mode-exit'.
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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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Each line in the buffer has an \"address\" (displayed in hexadecimal)
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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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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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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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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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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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(unless (eq major-mode 'hexl-mode)
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(let ((modified (buffer-modified-p))
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(inhibit-read-only t)
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(original-point (- (point) (point-min)))
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max-address)
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(and (eobp) (not (bobp))
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(setq original-point (1- original-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 max-address (+ (* (/ (1- (buffer-size)) 68) 16) 15))
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(setq max-address (1- (buffer-size)))
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;; If the buffer's EOL type is -dos, we need to account for
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;; extra CR characters added when hexlify-buffer writes the
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;; buffer to a file.
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(when (eq (coding-system-eol-type buffer-file-coding-system) 1)
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(setq max-address (+ (count-lines (point-min) (point-max))
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max-address))
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;; But if there's no newline at the last line, we are off by
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;; one; adjust.
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(or (eq (char-before (point-max)) ?\n)
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(setq max-address (1- max-address)))
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(setq original-point (+ (count-lines (point-min) (point))
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original-point))
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(or (bolp) (setq original-point (1- original-point))))
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(hexlify-buffer)
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(set-buffer-modified-p modified))
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(make-local-variable 'hexl-max-address)
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(setq hexl-max-address max-address)
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(condition-case nil
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(hexl-goto-address original-point)
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(error nil)))
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;; We do not turn off the old major mode; instead we just
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;; override most of it. That way, we can restore it perfectly.
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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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(set (make-local-variable 'hexl-mode-old-isearch-search-fun-function)
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isearch-search-fun-function)
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(set (make-local-variable 'isearch-search-fun-function)
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'hexl-isearch-search-function)
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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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(make-local-variable 'hexl-mode-old-syntax-table)
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(setq hexl-mode-old-syntax-table (syntax-table))
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(set-syntax-table (standard-syntax-table))
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(add-hook 'write-contents-functions 'hexl-save-buffer nil t)
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(make-local-variable 'hexl-mode-old-require-final-newline)
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(setq hexl-mode-old-require-final-newline require-final-newline)
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(make-local-variable 'require-final-newline)
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(setq require-final-newline nil)
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;; Add hooks to rehexlify or dehexlify on various events.
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(add-hook 'after-revert-hook 'hexl-after-revert-hook nil t)
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(add-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer nil t)
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;; Set a callback function for eldoc.
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(set (make-local-variable 'eldoc-print-current-symbol-info-function)
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'hexl-print-current-point-info)
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(eldoc-add-command-completions "hexl-")
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(eldoc-remove-command "hexl-save-buffer"
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"hexl-current-address")
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(if hexl-follow-ascii (hexl-follow-ascii 1)))
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(run-hooks 'hexl-mode-hook))
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(defun hexl-isearch-search-function ()
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(if (and (not isearch-regexp) (not isearch-word))
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(lambda (string &optional bound noerror count)
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(funcall
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(if isearch-forward 're-search-forward 're-search-backward)
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(if (> (length string) 80)
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(regexp-quote string)
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(mapconcat 'string string "\\(?:\n\\(?:[:a-f0-9]+ \\)+ \\)?"))
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bound noerror count))
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(let ((isearch-search-fun-function nil))
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(isearch-search-fun))))
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(defun hexl-after-revert-hook ()
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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 nil))
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(defvar hexl-in-save-buffer nil)
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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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(if hexl-in-save-buffer nil
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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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;; Prevent infinite recursion.
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(let ((hexl-in-save-buffer t))
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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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nil))
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;; Return t to indicate we have saved t
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t))
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;;;###autoload
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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
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(list
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(let ((completion-ignored-extensions nil))
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(read-file-name "Filename: " nil nil 'ret-must-match))))
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;; Ignore the user's setting of default-major-mode.
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(let ((default-major-mode 'fundamental-mode))
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(find-file-literally 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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"Exit Hexl mode, returning to previous mode.
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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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(inhibit-read-only t)
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(original-point (1+ (hexl-current-address))))
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(dehexlify-buffer)
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(remove-hook 'write-contents-functions 'hexl-save-buffer t)
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(set-buffer-modified-p modified)
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(goto-char original-point)
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;; Maybe adjust point for the removed CR characters.
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(when (eq (coding-system-eol-type buffer-file-coding-system) 1)
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(setq original-point (- original-point
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(count-lines (point-min) (point))))
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(or (bobp) (setq original-point (1+ original-point))))
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(goto-char original-point)))
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(remove-hook 'after-revert-hook 'hexl-after-revert-hook t)
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(remove-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer t)
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(remove-hook 'post-command-hook 'hexl-follow-ascii-find t)
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(setq hexl-ascii-overlay nil)
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(setq require-final-newline hexl-mode-old-require-final-newline)
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(setq mode-name hexl-mode-old-mode-name)
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(setq isearch-search-fun-function hexl-mode-old-isearch-search-fun-function)
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(use-local-map hexl-mode-old-local-map)
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(set-syntax-table hexl-mode-old-syntax-table)
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(setq major-mode hexl-mode-old-major-mode)
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(force-mode-line-update))
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(defun hexl-maybe-dehexlify-buffer ()
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"Convert a hexl format buffer to binary.
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Ask the user for confirmation."
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(if (y-or-n-p "Convert contents back to binary format? ")
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(let ((modified (buffer-modified-p))
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(inhibit-read-only t)
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(original-point (1+ (hexl-current-address))))
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(dehexlify-buffer)
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(remove-hook 'write-contents-functions 'hexl-save-buffer t)
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(set-buffer-modified-p modified)
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(goto-char original-point))))
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(defun hexl-current-address (&optional validate)
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"Return current hexl-address."
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(interactive)
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(let ((current-column (- (% (- (point) (point-min) -1) 68) 11))
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(hexl-address 0))
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(if (< current-column 0)
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(if validate
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(error "Point is not on a character in the file")
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(setq current-column 0)))
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(setq hexl-address
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(+ (* (/ (- (point) (point-min) -1) 68) 16)
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(if (>= current-column 41)
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(- current-column 41)
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(/ (- current-column (/ current-column 5)) 2))))
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(when (interactive-p)
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(message "Current address is %d/0x%08x" hexl-address hexl-address))
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hexl-address))
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(defun hexl-print-current-point-info ()
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"Return current hexl-address in string.
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This function is indented to be used as eldoc callback."
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(let ((addr (hexl-current-address)))
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(format "Current address is %d/0x%08x" addr addr)))
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(defun hexl-address-to-marker (address)
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"Return buffer position for ADDRESS."
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(interactive "nAddress: ")
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(+ (* (/ address 16) 68) 10 (point-min) (/ (* (% 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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"Go to hexl-mode address (hex string) HEX-ADDRESS.
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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)
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(hexl-oct-char-to-integer
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(string-to-char octal-string))))
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(setq octal-string (substring octal-string 1)))
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oct-num))
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;; move point functions
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|
|
|
(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.
|
|
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))
|
|
(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 ()
|
|
"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 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-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.
|
|
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)
|
|
;; 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))
|
|
(save-excursion
|
|
(goto-char (point-min))
|
|
(while (re-search-forward "^[0-9a-f]+:" nil t)
|
|
(put-text-property (match-beginning 0) (match-end 0)
|
|
'font-lock-face 'hexl-address-area))
|
|
(goto-char (point-min))
|
|
(while (re-search-forward " \\(.+$\\)" nil t)
|
|
(put-text-property (match-beginning 1) (match-end 1)
|
|
'font-lock-face 'hexl-ascii-area)))
|
|
(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.
|
|
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 ((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."
|
|
(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-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.
|
|
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-multibyte-char last-command-char arg))
|
|
|
|
(defun hexl-insert-char (ch num)
|
|
"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]" ch))
|
|
(let ((address (hexl-current-address t)))
|
|
(while (> num 0)
|
|
(let ((hex-position
|
|
(+ (* (/ address 16) 68)
|
|
10 (point-min)
|
|
(* 2 (% address 16))
|
|
(/ (% address 16) 2)))
|
|
(ascii-position
|
|
(+ (* (/ address 16) 68) 51 (point-min) (% 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 character given by its hexadecimal code ARG times at point."
|
|
(interactive "p")
|
|
(let ((num (hexl-hex-string-to-integer (read-string "Hex number: "))))
|
|
(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 character given by its decimal code ARG times at point."
|
|
(interactive "p")
|
|
(let ((num (string-to-int (read-string "Decimal Number: "))))
|
|
(if (< num 0)
|
|
(error "Decimal number out of range")
|
|
(hexl-insert-multibyte-char num arg))))
|
|
|
|
(defun hexl-insert-octal-char (arg)
|
|
"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 (< 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-activate-ruler ()
|
|
"Activate `ruler-mode'"
|
|
(require 'ruler-mode)
|
|
(set (make-local-variable 'ruler-mode-ruler-function)
|
|
'hexl-mode-ruler)
|
|
(ruler-mode 1))
|
|
|
|
(defun hexl-follow-line ()
|
|
"Activate `hl-line-mode'"
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(require 'frame)
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(require 'hl-line)
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(set (make-local-variable 'hl-line-range-function)
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'hexl-highlight-line-range)
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(set (make-local-variable 'hl-line-face)
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'highlight)
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(hl-line-mode 1))
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(defun hexl-highlight-line-range ()
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"Return the range of address area for the point.
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This function is assumed to be used as call back function for `hl-line-mode'."
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(cons
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(line-beginning-position)
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;; 9 stands for (length "87654321:")
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(+ (line-beginning-position) 9)))
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(defun hexl-follow-ascii-find ()
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"Find and highlight the ASCII element corresponding to current point."
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(let ((pos (+ 51
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(- (point) (current-column))
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(mod (hexl-current-address) 16))))
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(move-overlay hexl-ascii-overlay pos (1+ pos))
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))
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(defun hexl-mode-ruler ()
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"Return a string ruler for hexl mode."
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(let* ((highlight (mod (hexl-current-address) 16))
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(s " 87654321 0011 2233 4455 6677 8899 aabb ccdd eeff 0123456789abcdef")
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(pos 0))
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(set-text-properties 0 (length s) nil s)
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;; Turn spaces in the header into stretch specs so they work
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;; regardless of the header-line face.
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(while (string-match "[ \t]+" s pos)
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(setq pos (match-end 0))
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(put-text-property (match-beginning 0) pos 'display
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;; Assume fixed-size chars
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`(space :align-to ,(1- pos))
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s))
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;; Highlight the current column.
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(put-text-property (+ 11 (/ (* 5 highlight) 2))
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(+ 13 (/ (* 5 highlight) 2))
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'face 'highlight s)
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;; Highlight the current ascii column
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(put-text-property (+ 13 39 highlight) (+ 13 40 highlight)
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'face 'highlight s)
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s))
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;; startup stuff.
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(if hexl-mode-map
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nil
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(setq hexl-mode-map (make-keymap))
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;; Make all self-inserting keys go through hexl-self-insert-command,
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;; because we need to convert them to unibyte characters before
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;; inserting them into the buffer.
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(define-key hexl-mode-map [remap self-insert-command] 'hexl-self-insert-command)
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(define-key hexl-mode-map "\C-m" 'hexl-self-insert-command)
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(define-key hexl-mode-map [left] 'hexl-backward-char)
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(define-key hexl-mode-map [right] 'hexl-forward-char)
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(define-key hexl-mode-map [up] 'hexl-previous-line)
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(define-key hexl-mode-map [down] 'hexl-next-line)
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(define-key hexl-mode-map [M-left] 'hexl-backward-short)
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(define-key hexl-mode-map [M-right] 'hexl-forward-short)
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(define-key hexl-mode-map [next] 'hexl-scroll-up)
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(define-key hexl-mode-map [prior] 'hexl-scroll-down)
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(define-key hexl-mode-map [home] 'hexl-beginning-of-line)
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(define-key hexl-mode-map [end] 'hexl-end-of-line)
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(define-key hexl-mode-map [C-home] 'hexl-beginning-of-buffer)
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(define-key hexl-mode-map [C-end] 'hexl-end-of-buffer)
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(define-key hexl-mode-map [deletechar] 'undefined)
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(define-key hexl-mode-map [deleteline] 'undefined)
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(define-key hexl-mode-map [insertline] 'undefined)
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(define-key hexl-mode-map [S-delete] 'undefined)
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(define-key hexl-mode-map "\177" 'undefined)
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(define-key hexl-mode-map "\C-a" 'hexl-beginning-of-line)
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(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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(if (not (eq (key-binding (char-to-string help-char)) 'help-command))
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(define-key hexl-mode-map (char-to-string help-char) 'undefined))
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(define-key hexl-mode-map "\C-k" 'undefined)
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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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(fset 'hexl-ESC-prefix (copy-keymap 'ESC-prefix))
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(define-key hexl-mode-map "\e" 'hexl-ESC-prefix)
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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-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-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-o" 'hexl-insert-octal-char)
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(define-key hexl-mode-map "\e\C-q" '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-x" 'hexl-insert-hex-char)
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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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(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 "\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 "\eq" '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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(fset 'hexl-C-c-prefix (copy-keymap mode-specific-map))
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(define-key hexl-mode-map "\C-c" 'hexl-C-c-prefix)
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(define-key hexl-mode-map "\C-c\C-c" 'hexl-mode-exit)
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(fset 'hexl-C-x-prefix (copy-keymap 'Control-X-prefix))
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(define-key hexl-mode-map "\C-x" 'hexl-C-x-prefix)
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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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(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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(provide 'hexl)
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;;; arch-tag: d5a7aa8a-9bce-480b-bcff-6c4c7ca5ea4a
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;;; hexl.el ends here
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