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1 ;;; hexl.el --- edit a file in a hex dump format using the hexl filter.
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2
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3 ;; Copyright (C) 1989, 1994 Free Software Foundation, Inc.
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4
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5 ;; Author: Keith Gabryelski <ag@wheaties.ai.mit.edu>
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6 ;; Maintainer: FSF
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7 ;; Keywords: data
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8
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9 ;; This file is part of XEmacs.
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10
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11 ;; XEmacs is free software; you can redistribute it and/or modify it
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12 ;; under the terms of the GNU General Public License as published by
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13 ;; the Free Software Foundation; either version 2, or (at your option)
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14 ;; any later version.
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15
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16 ;; XEmacs is distributed in the hope that it will be useful, but
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17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 ;; General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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23 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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24 ;; 02111-1307, USA.
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25
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2
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26 ;;; Synched up with: FSF 19.34.
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27
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28 ;;; Commentary:
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29
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30 ;; This package implements a major mode for editing binary files. It uses
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31 ;; a program called hexl, supplied with the GNU Emacs distribution, that
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32 ;; can filter a binary into an editable format or from the format back into
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33 ;; binary. For full instructions, invoke `hexl-mode' on an empty buffer and
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34 ;; do `M-x describe-mode'.
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35 ;;
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36 ;; This may be useful in your .emacs:
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37 ;;
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38 ;; (autoload 'hexl-find-file "hexl"
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39 ;; "Edit file FILENAME in hexl-mode." t)
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40 ;;
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41 ;; (define-key global-map "\C-c\C-h" 'hexl-find-file)
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42 ;;
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43 ;; NOTE: Remember to change HEXL-PROGRAM or HEXL-OPTIONS if needed.
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44 ;;
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45 ;; Currently hexl only supports big endian hex output with 16 bit
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46 ;; grouping.
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47 ;;
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48 ;; -iso in `hexl-options' will allow iso characters to display in the
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49 ;; ASCII region of the screen (if your emacs supports this) instead of
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50 ;; changing them to dots.
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51
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52 ;;; Code:
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53
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54 ;;
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55 ;; vars here
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56 ;;
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57
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58 (defvar hexl-program "hexl"
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59 "The program that will hexlify and dehexlify its stdin.
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60 `hexl-program' will always be concatenated with `hexl-options'
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61 and \"-de\" when dehexlifying a buffer.")
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62
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63 (defvar hexl-iso ""
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64 "If your emacs can handle ISO characters, this should be set to
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65 \"-iso\" otherwise it should be \"\".")
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66
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67 (defvar hexl-options (format "-hex %s" hexl-iso)
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68 "Options to hexl-program that suit your needs.")
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69
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70 (defvar hexlify-command
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71 (format "%s%s %s" exec-directory hexl-program hexl-options)
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72 "The command to use to hexlify a buffer.")
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73
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74 (defvar dehexlify-command
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75 (format "%s%s -de %s" exec-directory hexl-program hexl-options)
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76 "The command to use to unhexlify a buffer.")
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77
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78 (defvar hexl-max-address 0
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79 "Maximum offset into hexl buffer.")
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80
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81 (defvar hexl-mode-map nil)
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82
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83 (defvar hexl-mode-old-local-map)
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84 (defvar hexl-mode-old-mode-name)
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85 (defvar hexl-mode-old-major-mode)
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86 (defvar hexl-mode-old-write-contents-hooks)
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87 (defvar hexl-mode-old-require-final-newline)
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88 (defvar hexl-mode-old-syntax-table)
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89
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90 ;; routines
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91
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92 ;;;###autoload
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93 (defun hexl-mode (&optional arg)
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94 "\\<hexl-mode-map>
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95 A major mode for editing binary files in hex dump format.
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96
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97 This function automatically converts a buffer into the hexl format
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98 using the function `hexlify-buffer'.
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99
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100 Each line in the buffer has an \"address\" (displayed in hexadecimal)
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101 representing the offset into the file that the characters on this line
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102 are at and 16 characters from the file (displayed as hexadecimal
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103 values grouped every 16 bits) and as their ASCII values.
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104
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105 If any of the characters (displayed as ASCII characters) are
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106 unprintable (control or meta characters) they will be replaced as
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107 periods.
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108
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109 If `hexl-mode' is invoked with an argument the buffer is assumed to be
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110 in hexl format.
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111
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112 A sample format:
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113
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114 HEX ADDR: 0001 0203 0405 0607 0809 0a0b 0c0d 0e0f ASCII-TEXT
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115 -------- ---- ---- ---- ---- ---- ---- ---- ---- ----------------
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116 00000000: 5468 6973 2069 7320 6865 786c 2d6d 6f64 This is hexl-mod
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117 00000010: 652e 2020 4561 6368 206c 696e 6520 7265 e. Each line re
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118 00000020: 7072 6573 656e 7473 2031 3620 6279 7465 presents 16 byte
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119 00000030: 7320 6173 2068 6578 6164 6563 696d 616c s as hexadecimal
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120 00000040: 2041 5343 4949 0a61 6e64 2070 7269 6e74 ASCII.and print
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121 00000050: 6162 6c65 2041 5343 4949 2063 6861 7261 able ASCII chara
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122 00000060: 6374 6572 732e 2020 416e 7920 636f 6e74 cters. Any cont
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123 00000070: 726f 6c20 6f72 206e 6f6e 2d41 5343 4949 rol or non-ASCII
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124 00000080: 2063 6861 7261 6374 6572 730a 6172 6520 characters.are
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125 00000090: 6469 7370 6c61 7965 6420 6173 2070 6572 displayed as per
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126 000000a0: 696f 6473 2069 6e20 7468 6520 7072 696e iods in the prin
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127 000000b0: 7461 626c 6520 6368 6172 6163 7465 7220 table character
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128 000000c0: 7265 6769 6f6e 2e0a region..
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129
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130 Movement is as simple as movement in a normal emacs text buffer. Most
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131 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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132 to move the cursor left, right, down, and up).
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133
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134 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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135 also supported.
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136
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137 There are several ways to change text in hexl mode:
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138
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139 ASCII characters (character between space (0x20) and tilde (0x7E)) are
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140 bound to self-insert so you can simply type the character and it will
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141 insert itself (actually overstrike) into the buffer.
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142
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143 \\[hexl-quoted-insert] followed by another keystroke allows you to insert the key even if
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144 it isn't bound to self-insert. An octal number can be supplied in place
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145 of another key to insert the octal number's ASCII representation.
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146
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147 \\[hexl-insert-hex-char] will insert a given hexadecimal value (if it is between 0 and 0xFF)
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148 into the buffer at the current point.
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149
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150 \\[hexl-insert-octal-char] will insert a given octal value (if it is between 0 and 0377)
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151 into the buffer at the current point.
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152
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153 \\[hexl-insert-decimal-char] will insert a given decimal value (if it is between 0 and 255)
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154 into the buffer at the current point.
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155
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156 \\[hexl-mode-exit] will exit hexl-mode.
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157
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158 Note: saving the file with any of the usual Emacs commands
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159 will actually convert it back to binary format while saving.
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160
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161 You can use \\[hexl-find-file] to visit a file in hexl-mode.
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162
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163 \\[describe-bindings] for advanced commands."
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164 (interactive "p")
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165 (if (eq major-mode 'hexl-mode)
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166 (error "You are already in hexl mode")
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167
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168 (let ((modified (buffer-modified-p))
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169 (inhibit-read-only t)
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170 (original-point (1- (point)))
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171 max-address)
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172 (and (eobp) (not (bobp))
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173 (setq original-point (1- original-point)))
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174 (if (not (or (eq arg 1) (not arg)))
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175 ;; if no argument then we guess at hexl-max-address
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176 (setq max-address (+ (* (/ (1- (buffer-size)) 68) 16) 15))
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177 (setq max-address (1- (buffer-size)))
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178 (hexlify-buffer)
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179 (set-buffer-modified-p modified))
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180 (make-local-variable 'hexl-max-address)
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181 (setq hexl-max-address max-address)
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182 (hexl-goto-address original-point))
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183
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184 ;; We do not turn off the old major mode; instead we just
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185 ;; override most of it. That way, we can restore it perfectly.
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186 (make-local-variable 'hexl-mode-old-local-map)
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187 (setq hexl-mode-old-local-map (current-local-map))
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188 (use-local-map hexl-mode-map)
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189
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190 (make-local-variable 'hexl-mode-old-mode-name)
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191 (setq hexl-mode-old-mode-name mode-name)
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192 (setq mode-name "Hexl")
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193
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194 (make-local-variable 'hexl-mode-old-major-mode)
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195 (setq hexl-mode-old-major-mode major-mode)
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196 (setq major-mode 'hexl-mode)
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197
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198 (make-local-variable 'hexl-mode-old-syntax-table)
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199 (setq hexl-mode-old-syntax-table (syntax-table))
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200 (set-syntax-table (standard-syntax-table))
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201
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202 (make-local-variable 'hexl-mode-old-write-contents-hooks)
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203 (setq hexl-mode-old-write-contents-hooks write-contents-hooks)
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204 (make-local-variable 'write-contents-hooks)
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205 (add-hook 'write-contents-hooks 'hexl-save-buffer)
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206
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207 (make-local-variable 'hexl-mode-old-require-final-newline)
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208 (setq hexl-mode-old-require-final-newline require-final-newline)
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209 (make-local-variable 'require-final-newline)
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210 (setq require-final-newline nil)
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211
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212 ;; Add hooks to rehexlify or dehexlify on various events.
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213 (make-local-hook 'after-revert-hook)
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214 (add-hook 'after-revert-hook 'hexl-after-revert-hook nil t)
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215
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216 (make-local-hook 'change-major-mode-hook)
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217 (add-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer nil t))
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218 (run-hooks 'hexl-mode-hook))
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219
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220 (defun hexl-after-revert-hook ()
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221 (hexlify-buffer)
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222 (set-buffer-modified-p nil))
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223
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224 (defvar hexl-in-save-buffer nil)
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225
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226 (defun hexl-save-buffer ()
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227 "Save a hexl format buffer as binary in visited file if modified."
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228 (interactive)
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229 (if hexl-in-save-buffer nil
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230 (set-buffer-modified-p (if (buffer-modified-p)
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231 (save-excursion
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232 (let ((buf (generate-new-buffer " hexl"))
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233 (name (buffer-name))
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234 (file-name (buffer-file-name))
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235 (start (point-min))
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236 (end (point-max))
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237 modified)
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238 (set-buffer buf)
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239 (insert-buffer-substring name start end)
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240 (set-buffer name)
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241 (dehexlify-buffer)
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242 ;; Prevent infinite recursion.
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243 (let ((hexl-in-save-buffer t)
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244 (buffer-file-type t)) ; for ms-dos
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245 (save-buffer))
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246 (setq modified (buffer-modified-p))
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247 (delete-region (point-min) (point-max))
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248 (insert-buffer-substring buf start end)
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249 (kill-buffer buf)
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250 modified))
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251 (message "(No changes need to be saved)")
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252 nil))
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253 ;; Return t to indicate we have saved t
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254 t))
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255
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256 ;;;###autoload
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257 (defun hexl-find-file (filename)
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258 "Edit file FILENAME in hexl-mode.
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259 Switch to a buffer visiting file FILENAME, creating one in none exists."
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260 (interactive "fFilename: ")
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261 (if (or (eq system-type 'ms-dos) (eq system-type 'windows-nt))
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262 (find-file-binary filename)
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263 (find-file filename))
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264 (if (not (eq major-mode 'hexl-mode))
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265 (hexl-mode)))
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266
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267 (defun hexl-mode-exit (&optional arg)
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268 "Exit Hexl mode, returning to previous mode.
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269 With arg, don't unhexlify buffer."
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270 (interactive "p")
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271 (if (or (eq arg 1) (not arg))
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272 (let ((modified (buffer-modified-p))
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273 (inhibit-read-only t)
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274 (original-point (1+ (hexl-current-address))))
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275 (dehexlify-buffer)
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276 (remove-hook 'write-contents-hooks 'hexl-save-buffer)
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277 (set-buffer-modified-p modified)
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278 (goto-char original-point)))
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279
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280 (remove-hook 'after-revert-hook 'hexl-after-revert-hook t)
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281 (remove-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer t)
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282
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283 (setq write-contents-hooks hexl-mode-old-write-contents-hooks)
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284 (setq require-final-newline hexl-mode-old-require-final-newline)
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285 (setq mode-name hexl-mode-old-mode-name)
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286 (use-local-map hexl-mode-old-local-map)
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287 (set-syntax-table hexl-mode-old-syntax-table)
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288 (setq major-mode hexl-mode-old-major-mode)
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289 (force-mode-line-update))
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290
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291 (defun hexl-maybe-dehexlify-buffer ()
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292 "Convert a hexl format buffer to binary.
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293 Ask the user for confirmation."
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294 (if (y-or-n-p "Convert contents back to binary format? ")
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295 (let ((modified (buffer-modified-p))
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296 (inhibit-read-only t)
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297 (original-point (1+ (hexl-current-address))))
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298 (dehexlify-buffer)
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299 (remove-hook 'write-contents-hooks 'hexl-save-buffer)
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300 (set-buffer-modified-p modified)
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301 (goto-char original-point))))
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302
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303 (defun hexl-current-address (&optional validate)
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304 "Return current hexl-address."
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305 (interactive)
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306 (let ((current-column (- (% (point) 68) 11))
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307 (hexl-address 0))
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308 (if (< current-column 0)
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309 (if validate
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310 (error "Point is not on a character in the file")
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311 (setq current-column 0)))
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312 (setq hexl-address
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313 (+ (* (/ (point) 68) 16)
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314 (if (>= current-column 41)
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315 (- current-column 41)
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316 (/ (- current-column (/ current-column 5)) 2))))
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317 hexl-address))
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318
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319 (defun hexl-address-to-marker (address)
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320 "Return marker for ADDRESS."
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321 (interactive "nAddress: ")
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322 (+ (* (/ address 16) 68) 11 (/ (* (% address 16) 5) 2)))
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323
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324 (defun hexl-goto-address (address)
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2
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325 "Go to hexl-mode (decimal) address ADDRESS.
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326 Signal error if ADDRESS out of range."
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327 (interactive "nAddress: ")
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328 (if (or (< address 0) (> address hexl-max-address))
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329 (error "Out of hexl region."))
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330 (goto-char (hexl-address-to-marker address)))
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331
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332 (defun hexl-goto-hex-address (hex-address)
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333 "Go to hexl-mode address (hex string) HEX-ADDRESS.
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334 Signal error if HEX-ADDRESS is out of range."
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335 (interactive "sHex Address: ")
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336 (hexl-goto-address (hexl-hex-string-to-integer hex-address)))
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337
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338 (defun hexl-hex-string-to-integer (hex-string)
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339 "Return decimal integer for HEX-STRING."
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340 (interactive "sHex number: ")
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341 (let ((hex-num 0))
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342 (while (not (equal hex-string ""))
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343 (setq hex-num (+ (* hex-num 16)
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344 (hexl-hex-char-to-integer (string-to-char hex-string))))
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345 (setq hex-string (substring hex-string 1)))
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346 hex-num))
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347
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348 (defun hexl-octal-string-to-integer (octal-string)
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349 "Return decimal integer for OCTAL-STRING."
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350 (interactive "sOctal number: ")
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351 (let ((oct-num 0))
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352 (while (not (equal octal-string ""))
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353 (setq oct-num (+ (* oct-num 8)
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354 (hexl-oct-char-to-integer
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355 (string-to-char octal-string))))
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|
356 (setq octal-string (substring octal-string 1)))
|
|
|
357 oct-num))
|
|
|
358
|
|
|
359 ;; move point functions
|
|
|
360
|
|
|
361 (defun hexl-backward-char (arg)
|
|
|
362 "Move to left ARG bytes (right if ARG negative) in hexl-mode."
|
|
|
363 (interactive "p")
|
|
|
364 (hexl-goto-address (- (hexl-current-address) arg)))
|
|
|
365
|
|
|
366 (defun hexl-forward-char (arg)
|
|
|
367 "Move right ARG bytes (left if ARG negative) in hexl-mode."
|
|
|
368 (interactive "p")
|
|
|
369 (hexl-goto-address (+ (hexl-current-address) arg)))
|
|
|
370
|
|
|
371 (defun hexl-backward-short (arg)
|
|
|
372 "Move to left ARG shorts (right if ARG negative) in hexl-mode."
|
|
|
373 (interactive "p")
|
|
|
374 (hexl-goto-address (let ((address (hexl-current-address)))
|
|
|
375 (if (< arg 0)
|
|
|
376 (progn
|
|
|
377 (setq arg (- arg))
|
|
|
378 (while (> arg 0)
|
|
|
379 (if (not (equal address (logior address 3)))
|
|
|
380 (if (> address hexl-max-address)
|
|
|
381 (progn
|
|
|
382 (message "End of buffer.")
|
|
|
383 (setq address hexl-max-address))
|
|
|
384 (setq address (logior address 3)))
|
|
|
385 (if (> address hexl-max-address)
|
|
|
386 (progn
|
|
|
387 (message "End of buffer.")
|
|
|
388 (setq address hexl-max-address))
|
|
|
389 (setq address (+ address 4))))
|
|
|
390 (setq arg (1- arg)))
|
|
|
391 (if (> address hexl-max-address)
|
|
|
392 (progn
|
|
|
393 (message "End of buffer.")
|
|
|
394 (setq address hexl-max-address))
|
|
|
395 (setq address (logior address 3))))
|
|
|
396 (while (> arg 0)
|
|
|
397 (if (not (equal address (logand address -4)))
|
|
|
398 (setq address (logand address -4))
|
|
|
399 (if (not (equal address 0))
|
|
|
400 (setq address (- address 4))
|
|
|
401 (message "Beginning of buffer.")))
|
|
|
402 (setq arg (1- arg))))
|
|
|
403 address)))
|
|
|
404
|
|
|
405 (defun hexl-forward-short (arg)
|
|
|
406 "Move right ARG shorts (left if ARG negative) in hexl-mode."
|
|
|
407 (interactive "p")
|
|
|
408 (hexl-backward-short (- arg)))
|
|
|
409
|
|
|
410 (defun hexl-backward-word (arg)
|
|
|
411 "Move to left ARG words (right if ARG negative) in hexl-mode."
|
|
|
412 (interactive "p")
|
|
|
413 (hexl-goto-address (let ((address (hexl-current-address)))
|
|
|
414 (if (< arg 0)
|
|
|
415 (progn
|
|
|
416 (setq arg (- arg))
|
|
|
417 (while (> arg 0)
|
|
|
418 (if (not (equal address (logior address 7)))
|
|
|
419 (if (> address hexl-max-address)
|
|
|
420 (progn
|
|
|
421 (message "End of buffer.")
|
|
|
422 (setq address hexl-max-address))
|
|
|
423 (setq address (logior address 7)))
|
|
|
424 (if (> address hexl-max-address)
|
|
|
425 (progn
|
|
|
426 (message "End of buffer.")
|
|
|
427 (setq address hexl-max-address))
|
|
|
428 (setq address (+ address 8))))
|
|
|
429 (setq arg (1- arg)))
|
|
|
430 (if (> address hexl-max-address)
|
|
|
431 (progn
|
|
|
432 (message "End of buffer.")
|
|
|
433 (setq address hexl-max-address))
|
|
|
434 (setq address (logior address 7))))
|
|
|
435 (while (> arg 0)
|
|
|
436 (if (not (equal address (logand address -8)))
|
|
|
437 (setq address (logand address -8))
|
|
|
438 (if (not (equal address 0))
|
|
|
439 (setq address (- address 8))
|
|
|
440 (message "Beginning of buffer.")))
|
|
|
441 (setq arg (1- arg))))
|
|
|
442 address)))
|
|
|
443
|
|
|
444 (defun hexl-forward-word (arg)
|
|
|
445 "Move right ARG words (left if ARG negative) in hexl-mode."
|
|
|
446 (interactive "p")
|
|
|
447 (hexl-backward-word (- arg)))
|
|
|
448
|
|
|
449 (defun hexl-previous-line (arg)
|
|
|
450 "Move vertically up ARG lines [16 bytes] (down if ARG negative) in hexl-mode.
|
|
|
451 If there is byte at the target address move to the last byte in that line."
|
|
|
452 (interactive "p")
|
|
|
453 (hexl-next-line (- arg)))
|
|
|
454
|
|
|
455 (defun hexl-next-line (arg)
|
|
|
456 "Move vertically down ARG lines [16 bytes] (up if ARG negative) in hexl-mode.
|
|
|
457 If there is no byte at the target address move to the last byte in that line."
|
|
|
458 (interactive "p")
|
|
|
459 (hexl-goto-address (let ((address (+ (hexl-current-address) (* arg 16))))
|
|
|
460 (if (and (< arg 0) (< address 0))
|
|
|
461 (progn (message "Out of hexl region.")
|
|
|
462 (setq address
|
|
|
463 (% (hexl-current-address) 16)))
|
|
|
464 (if (and (> address hexl-max-address)
|
|
|
465 (< (% hexl-max-address 16) (% address 16)))
|
|
|
466 (setq address hexl-max-address)
|
|
|
467 (if (> address hexl-max-address)
|
|
|
468 (progn (message "Out of hexl region.")
|
|
|
469 (setq
|
|
|
470 address
|
|
|
471 (+ (logand hexl-max-address -16)
|
|
|
472 (% (hexl-current-address) 16)))))))
|
|
|
473 address)))
|
|
|
474
|
|
|
475 (defun hexl-beginning-of-buffer (arg)
|
|
|
476 "Move to the beginning of the hexl buffer.
|
|
|
477 Leaves `hexl-mark' at previous position.
|
|
|
478 With prefix arg N, puts point N bytes of the way from the true beginning."
|
|
|
479 (interactive "p")
|
|
|
480 (push-mark (point))
|
|
|
481 (hexl-goto-address (+ 0 (1- arg))))
|
|
|
482
|
|
|
483 (defun hexl-end-of-buffer (arg)
|
|
|
484 "Go to `hexl-max-address' minus ARG."
|
|
|
485 (interactive "p")
|
|
|
486 (push-mark (point))
|
|
|
487 (hexl-goto-address (- hexl-max-address (1- arg))))
|
|
|
488
|
|
|
489 (defun hexl-beginning-of-line ()
|
|
|
490 "Goto beginning of line in hexl mode."
|
|
|
491 (interactive)
|
|
|
492 (goto-char (+ (* (/ (point) 68) 68) 11)))
|
|
|
493
|
|
|
494 (defun hexl-end-of-line ()
|
|
|
495 "Goto end of line in hexl mode."
|
|
|
496 (interactive)
|
|
|
497 (hexl-goto-address (let ((address (logior (hexl-current-address) 15)))
|
|
|
498 (if (> address hexl-max-address)
|
|
|
499 (setq address hexl-max-address))
|
|
|
500 address)))
|
|
|
501
|
|
|
502 (defun hexl-scroll-down (arg)
|
|
|
503 "Scroll hexl buffer window upward ARG lines; or near full window if no ARG."
|
|
|
504 (interactive "P")
|
|
|
505 (if (null arg)
|
|
|
506 (setq arg (1- (window-height)))
|
|
|
507 (setq arg (prefix-numeric-value arg)))
|
|
|
508 (hexl-scroll-up (- arg)))
|
|
|
509
|
|
|
510 (defun hexl-scroll-up (arg)
|
|
|
511 "Scroll hexl buffer window upward ARG lines; or near full window if no ARG."
|
|
|
512 (interactive "P")
|
|
|
513 (if (null arg)
|
|
|
514 (setq arg (1- (window-height)))
|
|
|
515 (setq arg (prefix-numeric-value arg)))
|
|
|
516 (let ((movement (* arg 16))
|
|
|
517 (address (hexl-current-address)))
|
|
|
518 (if (or (> (+ address movement) hexl-max-address)
|
|
|
519 (< (+ address movement) 0))
|
|
|
520 (message "Out of hexl region.")
|
|
|
521 (hexl-goto-address (+ address movement))
|
|
|
522 (recenter 0))))
|
|
|
523
|
|
|
524 (defun hexl-beginning-of-1k-page ()
|
|
2
|
525 "Go to beginning of 1k boundary."
|
|
0
|
526 (interactive)
|
|
|
527 (hexl-goto-address (logand (hexl-current-address) -1024)))
|
|
|
528
|
|
|
529 (defun hexl-end-of-1k-page ()
|
|
2
|
530 "Go to end of 1k boundary."
|
|
0
|
531 (interactive)
|
|
|
532 (hexl-goto-address (let ((address (logior (hexl-current-address) 1023)))
|
|
|
533 (if (> address hexl-max-address)
|
|
|
534 (setq address hexl-max-address))
|
|
|
535 address)))
|
|
|
536
|
|
|
537 (defun hexl-beginning-of-512b-page ()
|
|
2
|
538 "Go to beginning of 512 byte boundary."
|
|
0
|
539 (interactive)
|
|
|
540 (hexl-goto-address (logand (hexl-current-address) -512)))
|
|
|
541
|
|
|
542 (defun hexl-end-of-512b-page ()
|
|
2
|
543 "Go to end of 512 byte boundary."
|
|
0
|
544 (interactive)
|
|
|
545 (hexl-goto-address (let ((address (logior (hexl-current-address) 511)))
|
|
|
546 (if (> address hexl-max-address)
|
|
|
547 (setq address hexl-max-address))
|
|
|
548 address)))
|
|
|
549
|
|
|
550 (defun hexl-quoted-insert (arg)
|
|
|
551 "Read next input character and insert it.
|
|
|
552 Useful for inserting control characters.
|
|
|
553 You may also type up to 3 octal digits, to insert a character with that code"
|
|
|
554 (interactive "p")
|
|
|
555 (hexl-insert-char (read-quoted-char) arg))
|
|
|
556
|
|
|
557 ;00000000: 0011 2233 4455 6677 8899 aabb ccdd eeff 0123456789ABCDEF
|
|
|
558
|
|
2
|
559 ;;;###autoload
|
|
0
|
560 (defun hexlify-buffer ()
|
|
2
|
561 "Convert a binary buffer to hexl format.
|
|
|
562 This discards the buffer's undo information."
|
|
0
|
563 (interactive)
|
|
2
|
564 (and buffer-undo-list
|
|
|
565 (or (y-or-n-p "Converting to hexl format discards undo info; ok? ")
|
|
|
566 (error "Aborted")))
|
|
|
567 (setq buffer-undo-list nil)
|
|
0
|
568 (let ((binary-process-output nil) ; for Ms-Dos
|
|
2
|
569 (binary-process-input t)
|
|
|
570 (buffer-undo-list t))
|
|
0
|
571 (shell-command-on-region (point-min) (point-max) hexlify-command t)))
|
|
|
572
|
|
|
573 (defun dehexlify-buffer ()
|
|
2
|
574 "Convert a hexl format buffer to binary.
|
|
|
575 This discards the buffer's undo information."
|
|
0
|
576 (interactive)
|
|
2
|
577 (and buffer-undo-list
|
|
|
578 (or (y-or-n-p "Converting from hexl format discards undo info; ok? ")
|
|
|
579 (error "Aborted")))
|
|
|
580 (setq buffer-undo-list nil)
|
|
0
|
581 (let ((binary-process-output t) ; for Ms-Dos
|
|
2
|
582 (binary-process-input nil)
|
|
|
583 (buffer-undo-list t))
|
|
0
|
584 (shell-command-on-region (point-min) (point-max) dehexlify-command t)))
|
|
|
585
|
|
|
586 (defun hexl-char-after-point ()
|
|
|
587 "Return char for ASCII hex digits at point."
|
|
|
588 (hexl-htoi (char-after (point))
|
|
|
589 (char-after (1+ (point)))))
|
|
|
590
|
|
|
591 (defun hexl-htoi (lh rh)
|
|
|
592 "Hex (char) LH (char) RH to integer."
|
|
|
593 (+ (* (hexl-hex-char-to-integer lh) 16)
|
|
|
594 (hexl-hex-char-to-integer rh)))
|
|
|
595
|
|
|
596 (defun hexl-hex-char-to-integer (character)
|
|
|
597 "Take a char and return its value as if it was a hex digit."
|
|
|
598 (if (and (>= character ?0) (<= character ?9))
|
|
|
599 (- character ?0)
|
|
|
600 (let ((ch (logior character 32)))
|
|
|
601 (if (and (>= ch ?a) (<= ch ?f))
|
|
|
602 (- ch (- ?a 10))
|
|
2
|
603 (error "Invalid hex digit `%c'." ch)))))
|
|
0
|
604
|
|
|
605 (defun hexl-oct-char-to-integer (character)
|
|
|
606 "Take a char and return its value as if it was a octal digit."
|
|
|
607 (if (and (>= character ?0) (<= character ?7))
|
|
|
608 (- character ?0)
|
|
2
|
609 (error "Invalid octal digit `%c'." character)))
|
|
0
|
610
|
|
|
611 (defun hexl-printable-character (ch)
|
|
|
612 "Return a displayable string for character CH."
|
|
|
613 (format "%c" (if hexl-iso
|
|
|
614 (if (or (< ch 32) (and (>= ch 127) (< ch 160)))
|
|
|
615 46
|
|
|
616 ch)
|
|
|
617 (if (or (< ch 32) (>= ch 127))
|
|
|
618 46
|
|
|
619 ch))))
|
|
|
620
|
|
|
621 (defun hexl-self-insert-command (arg)
|
|
|
622 "Insert this character."
|
|
|
623 (interactive "p")
|
|
|
624 (hexl-insert-char last-command-char arg))
|
|
|
625
|
|
|
626 (defun hexl-insert-char (ch num)
|
|
|
627 "Insert a character in a hexl buffer."
|
|
|
628 (let ((address (hexl-current-address t)))
|
|
|
629 (while (> num 0)
|
|
|
630 (let ((hex-position
|
|
|
631 (+ (* (/ address 16) 68)
|
|
|
632 11
|
|
|
633 (* 2 (% address 16))
|
|
|
634 (/ (% address 16) 2)))
|
|
|
635 (ascii-position
|
|
|
636 (+ (* (/ address 16) 68) 52 (% address 16)))
|
|
|
637 at-ascii-position)
|
|
|
638 (if (= (point) ascii-position)
|
|
|
639 (setq at-ascii-position t))
|
|
|
640 (goto-char hex-position)
|
|
|
641 (delete-char 2)
|
|
|
642 (insert (format "%02x" ch))
|
|
|
643 (goto-char ascii-position)
|
|
|
644 (delete-char 1)
|
|
|
645 (insert (hexl-printable-character ch))
|
|
|
646 (or (eq address hexl-max-address)
|
|
|
647 (setq address (1+ address)))
|
|
|
648 (hexl-goto-address address)
|
|
|
649 (if at-ascii-position
|
|
|
650 (progn
|
|
|
651 (beginning-of-line)
|
|
|
652 (forward-char 51)
|
|
|
653 (forward-char (% address 16)))))
|
|
|
654 (setq num (1- num)))))
|
|
|
655
|
|
|
656 ;; hex conversion
|
|
|
657
|
|
|
658 (defun hexl-insert-hex-char (arg)
|
|
|
659 "Insert a ASCII char ARG times at point for a given hexadecimal number."
|
|
|
660 (interactive "p")
|
|
|
661 (let ((num (hexl-hex-string-to-integer (read-string "Hex number: "))))
|
|
|
662 (if (or (> num 255) (< num 0))
|
|
|
663 (error "Hex number out of range.")
|
|
|
664 (hexl-insert-char num arg))))
|
|
|
665
|
|
|
666 (defun hexl-insert-decimal-char (arg)
|
|
|
667 "Insert a ASCII char ARG times at point for a given decimal number."
|
|
|
668 (interactive "p")
|
|
|
669 (let ((num (string-to-int (read-string "Decimal Number: "))))
|
|
|
670 (if (or (> num 255) (< num 0))
|
|
|
671 (error "Decimal number out of range.")
|
|
|
672 (hexl-insert-char num arg))))
|
|
|
673
|
|
|
674 (defun hexl-insert-octal-char (arg)
|
|
|
675 "Insert a ASCII char ARG times at point for a given octal number."
|
|
|
676 (interactive "p")
|
|
|
677 (let ((num (hexl-octal-string-to-integer (read-string "Octal Number: "))))
|
|
|
678 (if (or (> num 255) (< num 0))
|
|
|
679 (error "Decimal number out of range.")
|
|
|
680 (hexl-insert-char num arg))))
|
|
|
681
|
|
|
682 ;; startup stuff.
|
|
|
683
|
|
|
684 (if hexl-mode-map
|
|
|
685 nil
|
|
2
|
686 (setq hexl-mode-map (make-sparse-keymap))
|
|
0
|
687
|
|
2
|
688 (define-key hexl-mode-map [left] 'hexl-backward-char)
|
|
|
689 (define-key hexl-mode-map [right] 'hexl-forward-char)
|
|
|
690 (define-key hexl-mode-map [up] 'hexl-previous-line)
|
|
|
691 (define-key hexl-mode-map [down] 'hexl-next-line)
|
|
72
|
692 (define-key hexl-mode-map [(meta left)] 'hexl-backward-short)
|
|
|
693 (define-key hexl-mode-map [(meta right)] 'hexl-forward-short)
|
|
2
|
694 (define-key hexl-mode-map [next] 'hexl-scroll-up)
|
|
|
695 (define-key hexl-mode-map [prior] 'hexl-scroll-down)
|
|
|
696 (define-key hexl-mode-map [home] 'hexl-beginning-of-buffer)
|
|
|
697 (define-key hexl-mode-map [deletechar] 'undefined)
|
|
|
698 (define-key hexl-mode-map [deleteline] 'undefined)
|
|
|
699 (define-key hexl-mode-map [insertline] 'undefined)
|
|
72
|
700 (define-key hexl-mode-map [(shift delete)] 'undefined)
|
|
2
|
701 (define-key hexl-mode-map "\177" 'undefined)
|
|
0
|
702
|
|
2
|
703 (define-key hexl-mode-map "\C-a" 'hexl-beginning-of-line)
|
|
|
704 (define-key hexl-mode-map "\C-b" 'hexl-backward-char)
|
|
|
705 (define-key hexl-mode-map "\C-d" 'undefined)
|
|
|
706 (define-key hexl-mode-map "\C-e" 'hexl-end-of-line)
|
|
|
707 (define-key hexl-mode-map "\C-f" 'hexl-forward-char)
|
|
|
708
|
|
98
|
709 (if (not (eq (key-binding (vector help-char)) 'help-command))
|
|
|
710 (define-key hexl-mode-map (vector help-char) 'undefined))
|
|
0
|
711
|
|
2
|
712 (define-key hexl-mode-map "\C-i" 'hexl-self-insert-command)
|
|
|
713 (define-key hexl-mode-map "\C-j" 'hexl-self-insert-command)
|
|
|
714 (define-key hexl-mode-map "\C-k" 'undefined)
|
|
|
715 (define-key hexl-mode-map "\C-m" 'hexl-self-insert-command)
|
|
|
716 (define-key hexl-mode-map "\C-n" 'hexl-next-line)
|
|
|
717 (define-key hexl-mode-map "\C-o" 'undefined)
|
|
|
718 (define-key hexl-mode-map "\C-p" 'hexl-previous-line)
|
|
|
719 (define-key hexl-mode-map "\C-q" 'hexl-quoted-insert)
|
|
|
720 (define-key hexl-mode-map "\C-t" 'undefined)
|
|
|
721 (define-key hexl-mode-map "\C-v" 'hexl-scroll-up)
|
|
|
722 (define-key hexl-mode-map "\C-w" 'undefined)
|
|
|
723 (define-key hexl-mode-map "\C-y" 'undefined)
|
|
0
|
724
|
|
2
|
725 (let ((ch 32))
|
|
|
726 (while (< ch 127)
|
|
|
727 (define-key hexl-mode-map (format "%c" ch) 'hexl-self-insert-command)
|
|
|
728 (setq ch (1+ ch))))
|
|
0
|
729
|
|
2
|
730 (define-key hexl-mode-map "\e\C-a" 'hexl-beginning-of-512b-page)
|
|
|
731 (define-key hexl-mode-map "\e\C-b" 'hexl-backward-short)
|
|
|
732 (define-key hexl-mode-map "\e\C-c" 'undefined)
|
|
|
733 (define-key hexl-mode-map "\e\C-d" 'hexl-insert-decimal-char)
|
|
|
734 (define-key hexl-mode-map "\e\C-e" 'hexl-end-of-512b-page)
|
|
|
735 (define-key hexl-mode-map "\e\C-f" 'hexl-forward-short)
|
|
|
736 (define-key hexl-mode-map "\e\C-g" 'undefined)
|
|
|
737 (define-key hexl-mode-map "\e\C-h" 'undefined)
|
|
|
738 (define-key hexl-mode-map "\e\C-i" 'undefined)
|
|
|
739 (define-key hexl-mode-map "\e\C-j" 'undefined)
|
|
|
740 (define-key hexl-mode-map "\e\C-k" 'undefined)
|
|
|
741 (define-key hexl-mode-map "\e\C-l" 'undefined)
|
|
|
742 (define-key hexl-mode-map "\e\C-m" 'undefined)
|
|
|
743 (define-key hexl-mode-map "\e\C-n" 'undefined)
|
|
|
744 (define-key hexl-mode-map "\e\C-o" 'hexl-insert-octal-char)
|
|
|
745 (define-key hexl-mode-map "\e\C-p" 'undefined)
|
|
|
746 (define-key hexl-mode-map "\e\C-q" 'undefined)
|
|
|
747 (define-key hexl-mode-map "\e\C-r" 'undefined)
|
|
|
748 (define-key hexl-mode-map "\e\C-s" 'undefined)
|
|
|
749 (define-key hexl-mode-map "\e\C-t" 'undefined)
|
|
|
750 (define-key hexl-mode-map "\e\C-u" 'undefined)
|
|
0
|
751
|
|
2
|
752 (define-key hexl-mode-map "\e\C-w" 'undefined)
|
|
|
753 (define-key hexl-mode-map "\e\C-x" 'hexl-insert-hex-char)
|
|
|
754 (define-key hexl-mode-map "\e\C-y" 'undefined)
|
|
0
|
755
|
|
2
|
756 (define-key hexl-mode-map "\ea" 'undefined)
|
|
|
757 (define-key hexl-mode-map "\eb" 'hexl-backward-word)
|
|
|
758 (define-key hexl-mode-map "\ec" 'undefined)
|
|
|
759 (define-key hexl-mode-map "\ed" 'undefined)
|
|
|
760 (define-key hexl-mode-map "\ee" 'undefined)
|
|
|
761 (define-key hexl-mode-map "\ef" 'hexl-forward-word)
|
|
|
762 (define-key hexl-mode-map "\eg" 'hexl-goto-hex-address)
|
|
|
763 (define-key hexl-mode-map "\eh" 'undefined)
|
|
|
764 (define-key hexl-mode-map "\ei" 'undefined)
|
|
|
765 (define-key hexl-mode-map "\ej" 'hexl-goto-address)
|
|
|
766 (define-key hexl-mode-map "\ek" 'undefined)
|
|
|
767 (define-key hexl-mode-map "\el" 'undefined)
|
|
|
768 (define-key hexl-mode-map "\em" 'undefined)
|
|
|
769 (define-key hexl-mode-map "\en" 'undefined)
|
|
|
770 (define-key hexl-mode-map "\eo" 'undefined)
|
|
|
771 (define-key hexl-mode-map "\ep" 'undefined)
|
|
|
772 (define-key hexl-mode-map "\eq" 'undefined)
|
|
|
773 (define-key hexl-mode-map "\er" 'undefined)
|
|
|
774 (define-key hexl-mode-map "\es" 'undefined)
|
|
|
775 (define-key hexl-mode-map "\et" 'undefined)
|
|
|
776 (define-key hexl-mode-map "\eu" 'undefined)
|
|
|
777 (define-key hexl-mode-map "\ev" 'hexl-scroll-down)
|
|
|
778 (define-key hexl-mode-map "\ey" 'undefined)
|
|
|
779 (define-key hexl-mode-map "\ez" 'undefined)
|
|
|
780 (define-key hexl-mode-map "\e<" 'hexl-beginning-of-buffer)
|
|
|
781 (define-key hexl-mode-map "\e>" 'hexl-end-of-buffer)
|
|
0
|
782
|
|
2
|
783 (define-key hexl-mode-map "\C-c\C-c" 'hexl-mode-exit)
|
|
0
|
784
|
|
2
|
785 (define-key hexl-mode-map "\C-x[" 'hexl-beginning-of-1k-page)
|
|
|
786 (define-key hexl-mode-map "\C-x]" 'hexl-end-of-1k-page)
|
|
|
787 (define-key hexl-mode-map "\C-x\C-p" 'undefined)
|
|
|
788 (define-key hexl-mode-map "\C-x\C-s" 'hexl-save-buffer)
|
|
|
789 (define-key hexl-mode-map "\C-x\C-t" 'undefined))
|
|
0
|
790
|
|
|
791 ;;; hexl.el ends here
|
