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1 ;; dired-vms.el - VMS support for dired. Revision: 1.17
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2 ;; Copyright (C) 1990, 1992 Free Software Foundation, Inc.
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3
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4 ;; This file is part of XEmacs.
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5
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6 ;; XEmacs is free software; you can redistribute it and/or modify it
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7 ;; under the terms of the GNU General Public License as published by
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8 ;; the Free Software Foundation; either version 2, or (at your option)
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9 ;; any later version.
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10
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11 ;; XEmacs is distributed in the hope that it will be useful, but
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12 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ;; General Public License for more details.
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15
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16 ;; You should have received a copy of the GNU General Public License
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17 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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18 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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19
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20 ;; Id: dired-vms.el,v 1.17 1991/09/09 16:54:03 sk RelBeta
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21
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22 ;; You'll need vmsproc.el for this function:
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23 (autoload 'subprocess-command-to-buffer "vmsproc")
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24
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25 (setq dired-subdir-regexp "^ *Directory \\([][:.A-Z-0-9_$;<>]+\\)\\(\\)[\n\r]")
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26
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27 (defconst dired-vms-filename-regexp
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28 "\\(\\([_A-Z0-9$]?\\|[_A-Z0-9$][_A-Z0-9$---]*\\)\\.[_A-Z0-9$---]*;+[0-9]*\\)"
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29 "Regular expression to match for a valid VMS file name in Dired buffer.
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30 Stupid freaking bug! Position of _ and $ shouldn't matter but they do.
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31 Having [A-Z0-9$_] bombs on filename _$$CHANGE_LOG$.TXT$ and $CHANGE_LOG$.TX
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32 Other orders of $ and _ seem to all work just fine.")
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33
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34 (setq dired-re-mark "^[^ \n\t]")
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35
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36 (defvar dired-directory-command
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37 "DIRECTORY/SIZE/DATE/PROT"
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38 "Directory command for dired under VMS.")
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39
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40 ;; requires vmsproc.el to work
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41 (defun dired-ls (file switches &optional wildcard full-directory-p)
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42 "Insert ls output of FILE,formatted according to SWITCHES.
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43 Optional third arg WILDCARD means treat FILE as shell wildcard.
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44 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
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45 switches do not contain `d'.
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46
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47 SWITCHES default to dired-listing-switches.
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48
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49 This is the VMS version of this UNIX command.
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50 The SWITCHES and WILDCARD arguments are ignored.
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51 Uses dired-directory-command."
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52 (save-restriction;; Must drag point along:
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53 (narrow-to-region (point) (point))
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54 (subprocess-command-to-buffer
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55 (concat dired-directory-command " " file)
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56 (current-buffer))
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57 (if full-directory-p
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58 (goto-char (point-max))
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59 ;; Just the file line if no full directory required:
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60 (goto-char (point-min))
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61 (let ((case-fold-search nil))
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62 (re-search-forward dired-subdir-regexp)
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63 (re-search-forward (concat "^" dired-vms-filename-regexp)))
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64 (beginning-of-line)
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65 (delete-region (point-min) (point))
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66 (forward-line 1)
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67 (delete-region (point) (point-max)))))
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68
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69 (defun dired-insert-headerline (dir) ; redefinition
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70 ;; VMS dired-ls makes its own headerline, but we must position the
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71 ;; cursor where dired-insert-subdir expects it.
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72 ;; This does not check whether the headerline matches DIR.
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73 (re-search-forward dired-subdir-regexp)
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74 (goto-char (match-end 1)))
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75
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76
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77 (defun dired-make-absolute (file &optional dir)
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78 ;;"Convert FILE (a pathname relative to DIR) to an absolute pathname."
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79 ;; This should be good enough for ange-ftp, but might easily be
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80 ;; redefined (for VMS?).
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81 ;; It should be reasonably fast, though, as it is called in
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82 ;; dired-get-filename.
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83 (concat (or dir
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84 (dired-current-directory)
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85 default-directory)
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86 file))
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87
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88 (defun dired-make-relative (file &optional dir)
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89 ;; In VMS we don't want relative names at all because of search path
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90 ;; logical names. Also, we never need to raise an error when a file
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91 ;; `doesn't belong' in this buffer (like in the Unix case).
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92 file)
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93
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94 (defun dired-in-this-tree (file dir)
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95 ;;"Is FILE part of the directory tree starting at DIR?"
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96 ;; Under VMS, file="DEV:[foo.bar]zod", dir="DEV:[foo]"
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97 (or (string= (substring dir -1) "\]")
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98 (string= (substring dir -1) "\:")
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99 (error "Not a directory: %s" dir))
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100 (string-match (concat "^" (regexp-quote (substring dir 0 -1)))
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101 file))
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102
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103 (defun dired-vms-split-filename (file)
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104 (if (string-match;; "DEV:[DIR]FIL" \1=DEV \2=DIR \3=FIL
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105 "^\\([.A-Z-0-9_$;]*\\):?[[<]\\([.A-Z-0-9_$;]*\\)[]>]\\([.A-Z-0-9_$;]*\\)$"
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106 file)
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107 (mapcar '(lambda (x)
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108 (substring file (match-beginning x) (match-end x)))
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109 '(1 2 3))))
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110
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111 ;; Must use this in dired-noselect instead of expand-file-name and
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112 ;; file-name-as-directory
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113 ;; Taken from the VMS dired version by
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114 ;;Roland Roberts BITNET: roberts@uornsrl
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115 ;; Nuclear Structure Research Lab INTERNET: rbr4@uhura.cc.rochester.edu
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116 ;; 271 East River Road UUCP: rochester!ur-cc!uhura!rbr4
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117 ;; Rochester, NY 14267 AT&T: (716) 275-8962
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118
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119
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120 (defun dired-noselect (dirname &optional switches)
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121 "Like M-x dired but returns the dired buffer as value, does not select it."
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122 (setq dirname (dired-fix-directory dirname))
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123 (dired-internal-noselect dirname switches))
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124
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125 (defun dired-fix-directory (dirname)
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126 "Fix up dirname to be a valid directory name and return it"
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127 (setq dirname
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128 (expand-file-name (or dirname (setq dirname default-directory))))
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129 (let ((end (1- (length dirname)))
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130 bracket colon)
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131 (if (or (char-equal ?\] (elt dirname end))
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132 (char-equal ?\: (elt dirname end)))
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133 dirname
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134 (setq bracket (string-match "\\]" dirname))
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135 (setq colon (string-match "\\:" dirname))
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136 (setq end (string-match "\\.DIR" dirname (or bracket colon)))
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137 (if end
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138 (let ((newdir
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139 (if bracket (concat (substring dirname 0 bracket)
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140 ".")
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141 (if colon (concat (substring dirname 0 (1+ colon))
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142 "[")
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143 "["))))
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144 (concat newdir (substring dirname
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145 (1+ (or bracket colon)) end)
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146 "]"))
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147 (if bracket (substring dirname 0 (1+ bracket))
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148 (if colon (substring dirname 0 (1+ colon))
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149 default-directory))))))
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150
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151 ;; Versions are not yet supported in dired.el (as of version 4.53):
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152 ;;(setq dired-file-version-regexp "[.;][0-9]+$")
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153
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154 (defun dired-move-to-filename (&optional raise-error eol)
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155 "In dired, move to first char of filename on this line.
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156 Returns position (point) or nil if no filename on this line."
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157 ;; This is the VMS version.
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158 (or eol (setq eol (progn (end-of-line) (point))))
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159 (beginning-of-line)
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160 (if (re-search-forward (concat " " dired-vms-filename-regexp) eol t)
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161 (goto-char (match-beginning 1))
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162 (if raise-error
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163 (error "No file on this line")
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164 nil)))
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165
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166 (defun dired-move-to-end-of-filename (&optional no-error eol)
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167 ;; Assumes point is at beginning of filename,
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168 ;; thus the rwx bit re-search-backward below will succeed in *this* line.
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169 ;; So, it should be called only after (dired-move-to-filename t).
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170 ;; case-fold-search must be nil, at least for VMS.
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171 ;; On failure, signals an error or returns nil.
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172 ;; This is the VMS version.
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173 (let (opoint flag ex sym hidden case-fold-search)
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174 (setq opoint (point))
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175 (or eol (setq eol (save-excursion (end-of-line) (point))))
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176 (setq hidden (and selective-display
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177 (save-excursion (search-forward "\r" eol t))))
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178 (if hidden
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179 nil
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180 (re-search-forward dired-vms-filename-regexp eol t))
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181 (or no-error
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182 (not (eq opoint (point)))
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183 (error (if hidden
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184 (substitute-command-keys
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185 "File line is hidden, type \\[dired-hide-subdir] to unhide")
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186 "No file on this line")))
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187 (if (eq opoint (point))
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188 nil
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189 (point))))
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190
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191 (defun dired-tree-lessp (dir1 dir2)
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192 (setq dir1 (substring (file-name-as-directory dir1) 0 -1)
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193 dir2 (substring (file-name-as-directory dir2) 0 -1))
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194 (let ((components-1 (dired-split "[:.]" dir1))
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195 (components-2 (dired-split "[:.]" dir2)))
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196 (while (and components-1
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197 components-2
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198 (equal (car components-1) (car components-2)))
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199 (setq components-1 (cdr components-1)
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200 components-2 (cdr components-2)))
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201 (let ((c1 (car components-1))
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202 (c2 (car components-2)))
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203
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204 (cond ((and c1 c2)
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205 (string-lessp c1 c2))
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206 ((and (null c1) (null c2))
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207 nil) ; they are equal, not lessp
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208 ((null c1) ; c2 is a subdir of c1: c1<c2
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209 t)
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210 ((null c2) ; c1 is a subdir of c2: c1>c2
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211 nil)
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212 (t (error "This can't happen"))))))
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213
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214 (defun dired-insert-subdir-validate (dirname)
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215 (let ((alist dired-subdir-alist)
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216 (found nil)
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217 item)
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218 (while (and alist (not found))
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219 (setq item (car alist)
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220 alist (cdr alist))
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221 (setq found (dired-in-this-tree dirname (car item))))
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222 (if (not found)
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223 (error "%s: directory not in this buffer" dirname))))
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224
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225 (defun dired-insert-subdir-newpos (new-dir)
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226 ;; Find pos for new subdir, according to tree order.
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227 (let ((alist (reverse dired-subdir-alist)) elt dir pos new-pos found)
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228 (while alist
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229 (setq elt (car alist)
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230 alist (cdr alist)
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231 dir (car elt)
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232 pos (dired-get-subdir-min elt))
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233 (if (or (and found
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234 (or (dired-in-this-tree dir found)
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235 (setq alist nil)))
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236 (and (dired-in-this-tree new-dir dir)
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237 (setq found dir)))
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238 (if (dired-tree-lessp dir new-dir)
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239 ;; Insert NEW-DIR after DIR
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240 (setq new-pos (dired-get-subdir-max elt)))))
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241 (goto-char new-pos))
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242 ;; want a separating newline between subdirs
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243 (or (eobp)
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244 (forward-line -1))
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245 (insert "\n")
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246 (point))
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247
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248 (defun dired-between-files ()
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249 (save-excursion
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250 (beginning-of-line)
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251 (or (equal (following-char) 9)
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252 (progn (forward-char 2)
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253 (or (looking-at "Total of")
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254 (equal (following-char) 32))))))
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255
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256 (defun dired-buffers-for-dir (dir)
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257 ;; Return a list of buffers that dired DIR (top level or in-situ subdir).
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258 ;; The list is in reverse order of buffer creation, most recent last.
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259 ;; As a side effect, killed dired buffers for DIR are removed from
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260 ;; dired-buffers.
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261 (setq dir (file-name-as-directory dir))
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262 (let ((alist dired-buffers) result elt)
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263 (while alist
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264 (setq elt (car alist))
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265 ;; In Unix we only looked into the buffer when
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266 ;; (dired-in-this-tree dir (car elt)) returned non-nil.
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267 ;; In VMS we have to look into each buffer because it doesn't
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268 ;; necessarily contain only the tree starting at the top level directory
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269 (let ((buf (cdr elt)))
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270 (if (buffer-name buf)
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271 (if (assoc dir (save-excursion
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272 (set-buffer buf)
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273 dired-subdir-alist))
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274 (setq result (cons buf result)))
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275 ;; else buffer is killed - clean up:
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276 (setq dired-buffers (delq elt dired-buffers))))
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277 (setq alist (cdr alist)))
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278 result))
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