code.delx.au - gnu-emacs/blob - lisp/arc-mode.el

   1 ;;; arc-mode.el --- simple editing of archives
   2
   3 ;; Copyright (C) 1995, 1997, 1998, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007 Free Software Foundation, Inc.
   5
   6 ;; Author: Morten Welinder <terra@gnu.org>
   7 ;; Keywords: archives msdog editing major-mode
   8 ;; Favourite-brand-of-beer: None, I hate beer.
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  25 ;; Boston, MA 02110-1301, USA.
  26
  27 ;;; Commentary:
  28
  29 ;; NAMING: "arc" is short for "archive" and does not refer specifically
  30 ;; to files whose name end in ".arc"
  31 ;;
  32 ;; This code does not decode any files internally, although it does
  33 ;; understand the directory level of the archives.  For this reason,
  34 ;; you should expect this code to need more fiddling than tar-mode.el
  35 ;; (although it at present has fewer bugs :-)  In particular, I have
  36 ;; not tested this under Ms-Dog myself.
  37 ;; -------------------------------------
  38 ;; INTERACTION: arc-mode.el should play together with
  39 ;;
  40 ;; * ange-ftp.el: Remote archives (i.e., ones that ange-ftp has brought
  41 ;;                to you) are handled by doing all updates on a local
  42 ;;                copy.  When you make changes to a remote file the
  43 ;;                changes will first take effect when the archive buffer
  44 ;;                is saved.  You will be warned about this.
  45 ;;
  46 ;; * dos-fns.el:  (Part of Emacs 19).  You get automatic ^M^J <--> ^J
  47 ;;                conversion.
  48 ;;
  49 ;; arc-mode.el does not work well with crypt++.el; for the archives as
  50 ;; such this could be fixed (but wouldn't be useful) by declaring such
  51 ;; archives to be "remote".  For the members this is a general Emacs
  52 ;; problem that 19.29's file formats may fix.
  53 ;; -------------------------------------
  54 ;; ARCHIVE TYPES: Currently only the archives below are handled, but the
  55 ;; structure for handling just about anything is in place.
  56 ;;
  57 ;;                        Arc     Lzh     Zip     Zoo
  58 ;;                        --------------------------------
  59 ;; View listing           Intern  Intern  Intern  Intern
  60 ;; Extract member         Y       Y       Y       Y
  61 ;; Save changed member    Y       Y       Y       Y
  62 ;; Add new member         N       N       N       N
  63 ;; Delete member          Y       Y       Y       Y
  64 ;; Rename member          Y       Y       N       N
  65 ;; Chmod                  -       Y       Y       -
  66 ;; Chown                  -       Y       -       -
  67 ;; Chgrp                  -       Y       -       -
  68 ;;
  69 ;; Special thanks to Bill Brodie <wbrodie@panix.com> for very useful tips
  70 ;; on the first released version of this package.
  71 ;;
  72 ;; This code is partly based on tar-mode.el from Emacs.
  73 ;; -------------------------------------
  74 ;; ARCHIVE STRUCTURES:
  75 ;; (This is mostly for myself.)
  76 ;;
  77 ;; ARC         A series of (header,file).  No interactions among members.
  78 ;;
  79 ;; LZH         A series of (header,file).  Headers are checksummed.  No
  80 ;;             interaction among members.
  81 ;;             Headers come in three flavours called level 0, 1 and 2 headers.
  82 ;;             Level 2 header is free of DOS specific restrictions and most
  83 ;;             prevalently used.  Also level 1 and 2 headers consist of base
  84 ;;             and extension headers.  For more details see
  85 ;;             http://homepage1.nifty.com/dangan/en/Content/Program/Java/jLHA/Notes/Notes.html
  86 ;;             http://www.osirusoft.com/joejared/lzhformat.html
  87 ;;
  88 ;; ZIP         A series of (lheader,fil) followed by a "central directory"
  89 ;;             which is a series of (cheader) followed by an end-of-
  90 ;;             central-dir record possibly followed by junk.  The e-o-c-d
  91 ;;             links to c-d.  cheaders link to lheaders which are basically
  92 ;;             cut-down versions of the cheaders.
  93 ;;
  94 ;; ZOO         An archive header followed by a series of (header,file).
  95 ;;             Each member header points to the next.  The archive is
  96 ;;             terminated by a bogus header with a zero next link.
  97 ;; -------------------------------------
  98 ;; HOOKS: `foo' means one of the supported archive types.
  99 ;;
 100 ;; archive-mode-hook
 101 ;; archive-foo-mode-hook
 102 ;; archive-extract-hooks
 103
 104 ;;; Code:
 105
 106 ;; -------------------------------------------------------------------------
 107 ;; Section: Configuration.
 108
 109 (defgroup archive nil
 110   "Simple editing of archives."
 111   :group 'data)
 112
 113 (defgroup archive-arc nil
 114   "ARC-specific options to archive."
 115   :group 'archive)
 116
 117 (defgroup archive-lzh nil
 118   "LZH-specific options to archive."
 119   :group 'archive)
 120
 121 (defgroup archive-zip nil
 122   "ZIP-specific options to archive."
 123   :group 'archive)
 124
 125 (defgroup archive-zoo nil
 126   "ZOO-specific options to archive."
 127   :group 'archive)
 128
 129 (defcustom archive-tmpdir
 130   ;; make-temp-name is safe here because we use this name
 131   ;; to create a directory.
 132   (make-temp-name
 133    (expand-file-name (if (eq system-type 'ms-dos) "ar" "archive.tmp")
 134                      temporary-file-directory))
 135   "Directory for temporary files made by `arc-mode.el'."
 136   :type 'directory
 137   :group 'archive)
 138
 139 (defcustom archive-remote-regexp "^/[^/:]*[^/:.]:"
 140   "*Regexp recognizing archive files names that are not local.
 141 A non-local file is one whose file name is not proper outside Emacs.
 142 A local copy of the archive will be used when updating."
 143   :type 'regexp
 144   :group 'archive)
 145
 146 (defcustom archive-extract-hooks nil
 147   "*Hooks to run when an archive member has been extracted."
 148   :type 'hook
 149   :group 'archive)
 150 ;; ------------------------------
 151 ;; Arc archive configuration
 152
 153 ;; We always go via a local file since there seems to be no reliable way
 154 ;; to extract to stdout without junk getting added.
 155 (defcustom archive-arc-extract
 156   '("arc" "x")
 157   "*Program and its options to run in order to extract an arc file member.
 158 Extraction should happen to the current directory.  Archive and member
 159 name will be added."
 160   :type '(list (string :tag "Program")
 161                 (repeat :tag "Options"
 162                         :inline t
 163                         (string :format "%v")))
 164   :group 'archive-arc)
 165
 166 (defcustom archive-arc-expunge
 167   '("arc" "d")
 168   "*Program and its options to run in order to delete arc file members.
 169 Archive and member names will be added."
 170   :type '(list (string :tag "Program")
 171                 (repeat :tag "Options"
 172                         :inline t
 173                         (string :format "%v")))
 174   :group 'archive-arc)
 175
 176 (defcustom archive-arc-write-file-member
 177   '("arc" "u")
 178   "*Program and its options to run in order to update an arc file member.
 179 Archive and member name will be added."
 180   :type '(list (string :tag "Program")
 181                 (repeat :tag "Options"
 182                         :inline t
 183                         (string :format "%v")))
 184   :group 'archive-arc)
 185 ;; ------------------------------
 186 ;; Lzh archive configuration
 187
 188 (defcustom archive-lzh-extract
 189   '("lha" "pq")
 190   "*Program and its options to run in order to extract an lzh file member.
 191 Extraction should happen to standard output.  Archive and member name will
 192 be added."
 193   :type '(list (string :tag "Program")
 194                 (repeat :tag "Options"
 195                         :inline t
 196                         (string :format "%v")))
 197   :group 'archive-lzh)
 198
 199 (defcustom archive-lzh-expunge
 200   '("lha" "d")
 201   "*Program and its options to run in order to delete lzh file members.
 202 Archive and member names will be added."
 203   :type '(list (string :tag "Program")
 204                 (repeat :tag "Options"
 205                         :inline t
 206                         (string :format "%v")))
 207   :group 'archive-lzh)
 208
 209 (defcustom archive-lzh-write-file-member
 210   '("lha" "a")
 211   "*Program and its options to run in order to update an lzh file member.
 212 Archive and member name will be added."
 213   :type '(list (string :tag "Program")
 214                 (repeat :tag "Options"
 215                         :inline t
 216                         (string :format "%v")))
 217   :group 'archive-lzh)
 218 ;; ------------------------------
 219 ;; Zip archive configuration
 220
 221 (defcustom archive-zip-extract
 222   (if (and (not (executable-find "unzip"))
 223            (executable-find "pkunzip"))
 224       '("pkunzip" "-e" "-o-")
 225     '("unzip" "-qq" "-c"))
 226   "*Program and its options to run in order to extract a zip file member.
 227 Extraction should happen to standard output.  Archive and member name will
 228 be added."
 229   :type '(list (string :tag "Program")
 230                 (repeat :tag "Options"
 231                         :inline t
 232                         (string :format "%v")))
 233   :group 'archive-zip)
 234
 235 ;; For several reasons the latter behaviour is not desirable in general.
 236 ;; (1) It uses more disk space.  (2) Error checking is worse or non-
 237 ;; existent.  (3) It tends to do funny things with other systems' file
 238 ;; names.
 239
 240 (defcustom archive-zip-expunge
 241   (if (and (not (executable-find "zip"))
 242            (executable-find "pkzip"))
 243       '("pkzip" "-d")
 244     '("zip" "-d" "-q"))
 245   "*Program and its options to run in order to delete zip file members.
 246 Archive and member names will be added."
 247   :type '(list (string :tag "Program")
 248                 (repeat :tag "Options"
 249                         :inline t
 250                         (string :format "%v")))
 251   :group 'archive-zip)
 252
 253 (defcustom archive-zip-update
 254   (if (and (not (executable-find "zip"))
 255            (executable-find "pkzip"))
 256       '("pkzip" "-u" "-P")
 257     '("zip" "-q"))
 258   "*Program and its options to run in order to update a zip file member.
 259 Options should ensure that specified directory will be put into the zip
 260 file.  Archive and member name will be added."
 261   :type '(list (string :tag "Program")
 262                 (repeat :tag "Options"
 263                         :inline t
 264                         (string :format "%v")))
 265   :group 'archive-zip)
 266
 267 (defcustom archive-zip-update-case
 268   (if (and (not (executable-find "zip"))
 269            (executable-find "pkzip"))
 270       '("pkzip" "-u" "-P")
 271     '("zip" "-q" "-k"))
 272   "*Program and its options to run in order to update a case fiddled zip member.
 273 Options should ensure that specified directory will be put into the zip file.
 274 Archive and member name will be added."
 275   :type '(list (string :tag "Program")
 276                 (repeat :tag "Options"
 277                         :inline t
 278                         (string :format "%v")))
 279   :group 'archive-zip)
 280
 281 (defcustom archive-zip-case-fiddle t
 282   "*If non-nil then zip file members may be down-cased.
 283 This case fiddling will only happen for members created by a system
 284 that uses caseless file names."
 285   :type 'boolean
 286   :group 'archive-zip)
 287 ;; ------------------------------
 288 ;; Zoo archive configuration
 289
 290 (defcustom archive-zoo-extract
 291   '("zoo" "xpq")
 292   "*Program and its options to run in order to extract a zoo file member.
 293 Extraction should happen to standard output.  Archive and member name will
 294 be added."
 295   :type '(list (string :tag "Program")
 296                 (repeat :tag "Options"
 297                         :inline t
 298                         (string :format "%v")))
 299   :group 'archive-zoo)
 300
 301 (defcustom archive-zoo-expunge
 302   '("zoo" "DqPP")
 303   "*Program and its options to run in order to delete zoo file members.
 304 Archive and member names will be added."
 305   :type '(list (string :tag "Program")
 306                 (repeat :tag "Options"
 307                         :inline t
 308                         (string :format "%v")))
 309   :group 'archive-zoo)
 310
 311 (defcustom archive-zoo-write-file-member
 312   '("zoo" "a")
 313   "*Program and its options to run in order to update a zoo file member.
 314 Archive and member name will be added."
 315   :type '(list (string :tag "Program")
 316                 (repeat :tag "Options"
 317                         :inline t
 318                         (string :format "%v")))
 319   :group 'archive-zoo)
 320 ;; -------------------------------------------------------------------------
 321 ;; Section: Variables
 322
 323 (defvar archive-subtype nil "Symbol describing archive type.")
 324 (defvar archive-file-list-start nil "Position of first contents line.")
 325 (defvar archive-file-list-end nil "Position just after last contents line.")
 326 (defvar archive-proper-file-start nil "Position of real archive's start.")
 327 (defvar archive-read-only nil "Non-nil if the archive is read-only on disk.")
 328 (defvar archive-local-name nil "Name of local copy of remote archive.")
 329 (defvar archive-mode-map
 330   (let ((map (make-keymap)))
 331     (suppress-keymap map)
 332     (define-key map " " 'archive-next-line)
 333     (define-key map "a" 'archive-alternate-display)
 334     ;;(define-key map "c" 'archive-copy)
 335     (define-key map "d" 'archive-flag-deleted)
 336     (define-key map "\C-d" 'archive-flag-deleted)
 337     (define-key map "e" 'archive-extract)
 338     (define-key map "f" 'archive-extract)
 339     (define-key map "\C-m" 'archive-extract)
 340     (define-key map "g" 'revert-buffer)
 341     (define-key map "h" 'describe-mode)
 342     (define-key map "m" 'archive-mark)
 343     (define-key map "n" 'archive-next-line)
 344     (define-key map "\C-n" 'archive-next-line)
 345     (define-key map [down] 'archive-next-line)
 346     (define-key map "o" 'archive-extract-other-window)
 347     (define-key map "p" 'archive-previous-line)
 348     (define-key map "q" 'quit-window)
 349     (define-key map "\C-p" 'archive-previous-line)
 350     (define-key map [up] 'archive-previous-line)
 351     (define-key map "r" 'archive-rename-entry)
 352     (define-key map "u" 'archive-unflag)
 353     (define-key map "\M-\C-?" 'archive-unmark-all-files)
 354     (define-key map "v" 'archive-view)
 355     (define-key map "x" 'archive-expunge)
 356     (define-key map "\177" 'archive-unflag-backwards)
 357     (define-key map "E" 'archive-extract-other-window)
 358     (define-key map "M" 'archive-chmod-entry)
 359     (define-key map "G" 'archive-chgrp-entry)
 360     (define-key map "O" 'archive-chown-entry)
 361
 362     (if (fboundp 'command-remapping)
 363         (progn
 364           (define-key map [remap advertised-undo] 'archive-undo)
 365           (define-key map [remap undo] 'archive-undo))
 366       (substitute-key-definition 'advertised-undo 'archive-undo map global-map)
 367       (substitute-key-definition 'undo 'archive-undo map global-map))
 368
 369     (define-key map
 370       (if (featurep 'xemacs) 'button2 [mouse-2]) 'archive-extract)
 371
 372     (if (featurep 'xemacs)
 373         ()                              ; out of luck
 374
 375       (define-key map [menu-bar immediate]
 376         (cons "Immediate" (make-sparse-keymap "Immediate")))
 377       (define-key map [menu-bar immediate alternate]
 378         '(menu-item "Alternate Display" archive-alternate-display
 379           :enable (boundp (archive-name "alternate-display"))
 380           :help "Toggle alternate file info display"))
 381       (define-key map [menu-bar immediate view]
 382         '(menu-item "View This File" archive-view
 383           :help "Display file at cursor in View Mode"))
 384       (define-key map [menu-bar immediate display]
 385         '(menu-item "Display in Other Window" archive-display-other-window
 386           :help "Display file at cursor in another window"))
 387       (define-key map [menu-bar immediate find-file-other-window]
 388         '(menu-item "Find in Other Window" archive-extract-other-window
 389           :help "Edit file at cursor in another window"))
 390       (define-key map [menu-bar immediate find-file]
 391         '(menu-item "Find This File" archive-extract
 392           :help "Extract file at cursor and edit it"))
 393
 394       (define-key map [menu-bar mark]
 395         (cons "Mark" (make-sparse-keymap "Mark")))
 396       (define-key map [menu-bar mark unmark-all]
 397         '(menu-item "Unmark All" archive-unmark-all-files
 398           :help "Unmark all marked files"))
 399       (define-key map [menu-bar mark deletion]
 400         '(menu-item "Flag" archive-flag-deleted
 401           :help "Flag file at cursor for deletion"))
 402       (define-key map [menu-bar mark unmark]
 403         '(menu-item "Unflag" archive-unflag
 404           :help "Unmark file at cursor"))
 405       (define-key map [menu-bar mark mark]
 406         '(menu-item "Mark" archive-mark
 407           :help "Mark file at cursor"))
 408
 409       (define-key map [menu-bar operate]
 410         (cons "Operate" (make-sparse-keymap "Operate")))
 411       (define-key map [menu-bar operate chown]
 412         '(menu-item "Change Owner..." archive-chown-entry
 413           :enable (fboundp (archive-name "chown-entry"))
 414           :help "Change owner of marked files"))
 415       (define-key map [menu-bar operate chgrp]
 416         '(menu-item "Change Group..." archive-chgrp-entry
 417           :enable (fboundp (archive-name "chgrp-entry"))
 418           :help "Change group ownership of marked files"))
 419       (define-key map [menu-bar operate chmod]
 420         '(menu-item "Change Mode..." archive-chmod-entry
 421           :enable (fboundp (archive-name "chmod-entry"))
 422           :help "Change mode (permissions) of marked files"))
 423       (define-key map [menu-bar operate rename]
 424         '(menu-item "Rename to..." archive-rename-entry
 425           :enable (fboundp (archive-name "rename-entry"))
 426           :help "Rename marked files"))
 427       ;;(define-key map [menu-bar operate copy]
 428       ;;  '(menu-item "Copy to..." archive-copy))
 429       (define-key map [menu-bar operate expunge]
 430         '(menu-item "Expunge Marked Files" archive-expunge
 431           :help "Delete all flagged files from archive"))
 432       map))
 433   "Local keymap for archive mode listings.")
 434 (defvar archive-file-name-indent nil "Column where file names start.")
 435
 436 (defvar archive-remote nil "Non-nil if the archive is outside file system.")
 437 (make-variable-buffer-local 'archive-remote)
 438 (put 'archive-remote 'permanent-local t)
 439
 440 (defvar archive-member-coding-system nil "Coding-system of archive member.")
 441 (make-variable-buffer-local 'archive-member-coding-system)
 442
 443 (defvar archive-alternate-display nil
 444   "Non-nil when alternate information is shown.")
 445 (make-variable-buffer-local 'archive-alternate-display)
 446 (put 'archive-alternate-display 'permanent-local t)
 447
 448 (defvar archive-superior-buffer nil "In archive members, points to archive.")
 449 (put 'archive-superior-buffer 'permanent-local t)
 450
 451 (defvar archive-subfile-mode nil "Non-nil in archive member buffers.")
 452 (make-variable-buffer-local 'archive-subfile-mode)
 453 (put 'archive-subfile-mode 'permanent-local t)
 454
 455 (defvar archive-file-name-coding-system nil)
 456 (make-variable-buffer-local 'archive-file-name-coding-system)
 457 (put 'archive-file-name-coding-system 'permanent-local t)
 458
 459 (defvar archive-files nil
 460   "Vector of file descriptors.
 461 Each descriptor is a vector of the form
 462  [EXT-FILE-NAME INT-FILE-NAME CASE-FIDDLED MODE ...]")
 463 (make-variable-buffer-local 'archive-files)
 464
 465 ;; -------------------------------------------------------------------------
 466 ;; Section: Support functions.
 467
 468 (eval-when-compile
 469   (defsubst byte-after (pos)
 470     "Like char-after but an eight-bit char is converted to unibyte."
 471     (multibyte-char-to-unibyte (char-after pos)))
 472   (defsubst insert-unibyte (&rest args)
 473     "Like insert but don't make unibyte string and eight-bit char multibyte."
 474     (dolist (elt args)
 475       (if (integerp elt)
 476           (insert (if (< elt 128) elt (decode-char 'eight-bit elt)))
 477         (insert (string-to-multibyte elt)))))
 478   )
 479
 480 (defsubst archive-name (suffix)
 481   (intern (concat "archive-" (symbol-name archive-subtype) "-" suffix)))
 482
 483 (defun archive-l-e (str &optional len float)
 484   "Convert little endian string/vector STR to integer.
 485 Alternatively, STR may be a buffer position in the current buffer
 486 in which case a second argument, length LEN, should be supplied.
 487 FLOAT, if non-nil, means generate and return a float instead of an integer
 488 \(use this for numbers that can overflow the Emacs integer)."
 489   (if (stringp str)
 490       (setq len (length str))
 491     (setq str (buffer-substring str (+ str len))))
 492   (setq str (string-as-unibyte str))
 493   (let ((result 0)
 494         (i 0))
 495     (while (< i len)
 496       (setq i (1+ i)
 497             result (+ (if float (* result 256.0) (ash result 8))
 498                       (aref str (- len i)))))
 499     result))
 500
 501 (defun archive-int-to-mode (mode)
 502   "Turn an integer like 0700 (i.e., 448) into a mode string like -rwx------."
 503   ;; FIXME: merge with tar-grind-file-mode.
 504   (string
 505     (if (zerop (logand  8192 mode))
 506         (if (zerop (logand 16384 mode)) ?- ?d)
 507       ?c) ; completeness
 508     (if (zerop (logand   256 mode)) ?- ?r)
 509     (if (zerop (logand   128 mode)) ?- ?w)
 510     (if (zerop (logand    64 mode))
 511         (if (zerop (logand  1024 mode)) ?- ?S)
 512       (if (zerop (logand  1024 mode)) ?x ?s))
 513     (if (zerop (logand    32 mode)) ?- ?r)
 514     (if (zerop (logand    16 mode)) ?- ?w)
 515     (if (zerop (logand     8 mode))
 516         (if (zerop (logand  2048 mode)) ?- ?S)
 517       (if (zerop (logand  2048 mode)) ?x ?s))
 518     (if (zerop (logand     4 mode)) ?- ?r)
 519     (if (zerop (logand     2 mode)) ?- ?w)
 520     (if (zerop (logand     1 mode)) ?- ?x)))
 521
 522 (defun archive-calc-mode (oldmode newmode &optional error)
 523   "From the integer OLDMODE and the string NEWMODE calculate a new file mode.
 524 NEWMODE may be an octal number including a leading zero in which case it
 525 will become the new mode.\n
 526 NEWMODE may also be a relative specification like \"og-rwx\" in which case
 527 OLDMODE will be modified accordingly just like chmod(2) would have done.\n
 528 If optional third argument ERROR is non-nil an error will be signaled if
 529 the mode is invalid.  If ERROR is nil then nil will be returned."
 530   (cond ((string-match "^0[0-7]*$" newmode)
 531          (let ((result 0)
 532                (len (length newmode))
 533                (i 1))
 534            (while (< i len)
 535              (setq result (+ (lsh result 3) (aref newmode i) (- ?0))
 536                    i (1+ i)))
 537            (logior (logand oldmode 65024) result)))
 538         ((string-match "^\\([agou]+\\)\\([---+=]\\)\\([rwxst]+\\)$" newmode)
 539          (let ((who 0)
 540                (result oldmode)
 541                (op (aref newmode (match-beginning 2)))
 542                (bits 0)
 543                (i (match-beginning 3)))
 544            (while (< i (match-end 3))
 545              (let ((rwx (aref newmode i)))
 546                (setq bits (logior bits (cond ((= rwx ?r)  292)
 547                                              ((= rwx ?w)  146)
 548                                              ((= rwx ?x)   73)
 549                                              ((= rwx ?s) 3072)
 550                                              ((= rwx ?t)  512)))
 551                      i (1+ i))))
 552            (while (< who (match-end 1))
 553              (let* ((whoc (aref newmode who))
 554                     (whomask (cond ((= whoc ?a) 4095)
 555                                    ((= whoc ?u) 1472)
 556                                    ((= whoc ?g) 2104)
 557                                    ((= whoc ?o)    7))))
 558                (if (= op ?=)
 559                    (setq result (logand result (lognot whomask))))
 560                (if (= op ?-)
 561                    (setq result (logand result (lognot (logand whomask bits))))
 562                  (setq result (logior result (logand whomask bits)))))
 563              (setq who (1+ who)))
 564            result))
 565         (t
 566          (if error
 567              (error "Invalid mode specification: %s" newmode)))))
 568
 569 (defun archive-dosdate (date)
 570   "Stringify dos packed DATE record."
 571   (let ((year (+ 1980 (logand (ash date -9) 127)))
 572         (month (logand (ash date -5) 15))
 573         (day (logand date 31)))
 574     (if (or (> month 12) (< month 1))
 575         ""
 576       (format "%2d-%s-%d"
 577               day
 578               (aref ["Jan" "Feb" "Mar" "Apr" "May" "Jun"
 579                      "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"] (1- month))
 580               year))))
 581
 582 (defun archive-dostime (time)
 583   "Stringify dos packed TIME record."
 584   (let ((hour (logand (ash time -11) 31))
 585         (minute (logand (ash time -5) 63))
 586         (second (* 2 (logand time 31)))) ; 2 seconds resolution
 587     (format "%02d:%02d:%02d" hour minute second)))
 588
 589 (defun archive-unixdate (low high)
 590   "Stringify Unix (LOW HIGH) date."
 591   (let ((str (current-time-string (cons high low))))
 592     (format "%s-%s-%s"
 593             (substring str 8 10)
 594             (substring str 4 7)
 595             (substring str 20 24))))
 596
 597 (defun archive-unixtime (low high)
 598   "Stringify Unix (LOW HIGH) time."
 599   (let ((str (current-time-string (cons high low))))
 600     (substring str 11 19)))
 601
 602 (defun archive-get-lineno ()
 603   (if (>= (point) archive-file-list-start)
 604       (count-lines archive-file-list-start
 605                    (save-excursion (beginning-of-line) (point)))
 606     0))
 607
 608 (defun archive-get-descr (&optional noerror)
 609   "Return the descriptor vector for file at point.
 610 Does not signal an error if optional argument NOERROR is non-nil."
 611   (let ((no (archive-get-lineno)))
 612     (if (and (>= (point) archive-file-list-start)
 613              (< no (length archive-files)))
 614         (let ((item (aref archive-files no)))
 615           (if (vectorp item)
 616               item
 617             (if (not noerror)
 618                 (error "Entry is not a regular member of the archive"))))
 619       (if (not noerror)
 620           (error "Line does not describe a member of the archive")))))
 621 ;; -------------------------------------------------------------------------
 622 ;; Section: the mode definition
 623
 624 ;;;###autoload
 625 (defun archive-mode (&optional force)
 626   "Major mode for viewing an archive file in a dired-like way.
 627 You can move around using the usual cursor motion commands.
 628 Letters no longer insert themselves.
 629 Type `e' to pull a file out of the archive and into its own buffer;
 630 or click mouse-2 on the file's line in the archive mode buffer.
 631
 632 If you edit a sub-file of this archive (as with the `e' command) and
 633 save it, the contents of that buffer will be saved back into the
 634 archive.
 635
 636 \\{archive-mode-map}"
 637   ;; This is not interactive because you shouldn't be turning this
 638   ;; mode on and off.  You can corrupt things that way.
 639   (if (zerop (buffer-size))
 640       ;; At present we cannot create archives from scratch
 641       (funcall default-major-mode)
 642     (if (and (not force) archive-files) nil
 643       (let* ((type (archive-find-type))
 644              (typename (capitalize (symbol-name type))))
 645         (kill-all-local-variables)
 646         (make-local-variable 'archive-subtype)
 647         (setq archive-subtype type)
 648
 649         ;; Buffer contains treated image of file before the file contents
 650         (make-local-variable 'revert-buffer-function)
 651         (setq revert-buffer-function 'archive-mode-revert)
 652         (auto-save-mode 0)
 653
 654         ;; Remote archives are not written by a hook.
 655         (if archive-remote nil
 656           (add-hook 'write-contents-functions 'archive-write-file nil t))
 657
 658         (make-local-variable 'require-final-newline)
 659         (setq require-final-newline nil)
 660         (make-local-variable 'local-enable-local-variables)
 661         (setq local-enable-local-variables nil)
 662
 663         ;; Prevent loss of data when saving the file.
 664         (make-local-variable 'file-precious-flag)
 665         (setq file-precious-flag t)
 666
 667         (make-local-variable 'archive-read-only)
 668         ;; Archives which are inside other archives and whose
 669         ;; names are invalid for this OS, can't be written.
 670         (setq archive-read-only
 671               (or (not (file-writable-p (buffer-file-name)))
 672                   (and archive-subfile-mode
 673                        (string-match file-name-invalid-regexp
 674                                      (aref archive-subfile-mode 0)))))
 675
 676         ;; Should we use a local copy when accessing from outside Emacs?
 677         (make-local-variable 'archive-local-name)
 678
 679         ;; An archive can contain another archive whose name is invalid
 680         ;; on local filesystem.  Treat such archives as remote.
 681         (or archive-remote
 682             (setq archive-remote
 683                   (or (string-match archive-remote-regexp (buffer-file-name))
 684                       (string-match file-name-invalid-regexp
 685                                     (buffer-file-name)))))
 686
 687         (setq major-mode 'archive-mode)
 688         (setq mode-name (concat typename "-Archive"))
 689         ;; Run archive-foo-mode-hook and archive-mode-hook
 690         (run-mode-hooks (archive-name "mode-hook") 'archive-mode-hook)
 691         (use-local-map archive-mode-map))
 692
 693       (make-local-variable 'archive-proper-file-start)
 694       (make-local-variable 'archive-file-list-start)
 695       (make-local-variable 'archive-file-list-end)
 696       (make-local-variable 'archive-file-name-indent)
 697       (setq archive-file-name-coding-system
 698             (or file-name-coding-system
 699                 default-file-name-coding-system
 700                 locale-coding-system))
 701       (if default-enable-multibyte-characters
 702           (set-buffer-multibyte 'to))
 703       (archive-summarize nil)
 704       (setq buffer-read-only t))))
 705
 706 ;; Archive mode is suitable only for specially formatted data.
 707 (put 'archive-mode 'mode-class 'special)
 708
 709 (let ((item1 '(archive-subfile-mode " Archive")))
 710   (or (member item1 minor-mode-alist)
 711       (setq minor-mode-alist (cons item1 minor-mode-alist))))
 712 ;; -------------------------------------------------------------------------
 713 (defun archive-find-type ()
 714   (widen)
 715   (goto-char (point-min))
 716   ;; The funny [] here make it unlikely that the .elc file will be treated
 717   ;; as an archive by other software.
 718   (let (case-fold-search)
 719     (cond ((looking-at "[P]K\003\004") 'zip)
 720           ((looking-at "..-l[hz][0-9ds]-") 'lzh)
 721           ((looking-at "....................[\334]\247\304\375") 'zoo)
 722           ((and (looking-at "\C-z")     ; signature too simple, IMHO
 723                 (string-match "\\.[aA][rR][cC]$"
 724                               (or buffer-file-name (buffer-name))))
 725            'arc)
 726           ;; This pattern modelled on the BSD/GNU+Linux `file' command.
 727           ;; Have seen capital "LHA's", and file has lower case "LHa's" too.
 728           ;; Note this regexp is also in archive-exe-p.
 729           ((looking-at "MZ\\(.\\|\n\\)\\{34\\}LH[aA]'s SFX ") 'lzh-exe)
 730           (t (error "Buffer format not recognized")))))
 731 ;; -------------------------------------------------------------------------
 732 (defun archive-summarize (&optional shut-up)
 733   "Parse the contents of the archive file in the current buffer.
 734 Place a dired-like listing on the front;
 735 then narrow to it, so that only that listing
 736 is visible (and the real data of the buffer is hidden).
 737 Optional argument SHUT-UP, if non-nil, means don't print messages
 738 when parsing the archive."
 739   (widen)
 740   (let ((inhibit-read-only t))
 741     (or shut-up
 742         (message "Parsing archive file..."))
 743     (buffer-disable-undo (current-buffer))
 744     (setq archive-files (funcall (archive-name "summarize")))
 745     (or shut-up
 746         (message "Parsing archive file...done."))
 747     (setq archive-proper-file-start (point-marker))
 748     (narrow-to-region (point-min) (point))
 749     (set-buffer-modified-p nil)
 750     (buffer-enable-undo))
 751   (goto-char archive-file-list-start)
 752   (archive-next-line 0))
 753
 754 (defun archive-resummarize ()
 755   "Recreate the contents listing of an archive."
 756   (let ((modified (buffer-modified-p))
 757         (no (archive-get-lineno))
 758         (inhibit-read-only t))
 759     (widen)
 760     (delete-region (point-min) archive-proper-file-start)
 761     (archive-summarize t)
 762     (restore-buffer-modified-p modified)
 763     (goto-char archive-file-list-start)
 764     (archive-next-line no)))
 765
 766 (defun archive-summarize-files (files)
 767   "Insert a description of a list of files annotated with proper mouse face."
 768   (setq archive-file-list-start (point-marker))
 769   (setq archive-file-name-indent (if files (aref (car files) 1) 0))
 770   ;; We don't want to do an insert for each element since that takes too
 771   ;; long when the archive -- which has to be moved in memory -- is large.
 772   (insert
 773    (apply
 774     (function concat)
 775     (mapcar
 776      (lambda (fil)
 777        ;; Using `concat' here copies the text also, so we can add
 778        ;; properties without problems.
 779        (let ((text (concat (aref fil 0) "\n")))
 780          (if (featurep 'xemacs)
 781              ()                         ; out of luck
 782            (add-text-properties
 783             (aref fil 1) (aref fil 2)
 784             '(mouse-face highlight
 785               help-echo "mouse-2: extract this file into a buffer")
 786             text))
 787          text))
 788      files)))
 789   (setq archive-file-list-end (point-marker)))
 790
 791 (defun archive-alternate-display ()
 792   "Toggle alternative display.
 793 To avoid very long lines archive mode does not show all information.
 794 This function changes the set of information shown for each files."
 795   (interactive)
 796   (setq archive-alternate-display (not archive-alternate-display))
 797   (archive-resummarize))
 798 ;; -------------------------------------------------------------------------
 799 ;; Section: Local archive copy handling
 800
 801 (defun archive-unique-fname (fname dir)
 802   "Make sure a file FNAME can be created uniquely in directory DIR.
 803
 804 If FNAME can be uniquely created in DIR, it is returned unaltered.
 805 If FNAME is something our underlying filesystem can't grok, or if another
 806 file by that name already exists in DIR, a unique new name is generated
 807 using `make-temp-file', and the generated name is returned."
 808   (let ((fullname (expand-file-name fname dir))
 809         (alien (string-match file-name-invalid-regexp fname)))
 810     (if (or alien (file-exists-p fullname))
 811         (make-temp-file
 812          (expand-file-name
 813           (if (if (fboundp 'msdos-long-file-names)
 814                   (not (msdos-long-file-names)))
 815               "am"
 816             "arc-mode.")
 817           dir))
 818       fullname)))
 819
 820 (defun archive-maybe-copy (archive)
 821   (let ((coding-system-for-write 'no-conversion))
 822     (if archive-remote
 823         (let ((start (point-max))
 824               ;; Sometimes ARCHIVE is invalid while its actual name, as
 825               ;; recorded in its parent archive, is not.  For example, an
 826               ;; archive bar.zip inside another archive foo.zip gets a name
 827               ;; "foo.zip:bar.zip", which is invalid on DOS/Windows.
 828               ;; So use the actual name if available.
 829               (archive-name
 830                (or (and archive-subfile-mode (aref archive-subfile-mode 0))
 831                    archive)))
 832           (setq archive-local-name
 833                 (archive-unique-fname archive-name archive-tmpdir))
 834           ;; Maked sure all the leading directories in
 835           ;; archive-local-name exist under archive-tmpdir, so that
 836           ;; the directory structure recorded in the archive is
 837           ;; reconstructed in the temporary directory.
 838           (make-directory (file-name-directory archive-local-name) t)
 839           (save-restriction
 840             (widen)
 841             (write-region start (point-max) archive-local-name nil 'nomessage))
 842           archive-local-name)
 843       (if (buffer-modified-p) (save-buffer))
 844       archive)))
 845
 846 (defun archive-maybe-update (unchanged)
 847   (if archive-remote
 848       (let ((name archive-local-name)
 849             (modified (buffer-modified-p))
 850             (coding-system-for-read 'no-conversion)
 851             (lno (archive-get-lineno))
 852             (inhibit-read-only t))
 853         (if unchanged nil
 854           (setq archive-files nil)
 855           (erase-buffer)
 856           (insert-file-contents name)
 857           (archive-mode t)
 858           (goto-char archive-file-list-start)
 859           (archive-next-line lno))
 860         (archive-delete-local name)
 861         (if (not unchanged)
 862             (message
 863              "Buffer `%s' must be saved for changes to take effect"
 864              (buffer-name (current-buffer))))
 865         (set-buffer-modified-p (or modified (not unchanged))))))
 866
 867 (defun archive-delete-local (name)
 868   "Delete file NAME and its parents up to and including `archive-tmpdir'."
 869   (let ((again t)
 870         (top (directory-file-name (file-name-as-directory archive-tmpdir))))
 871     (condition-case nil
 872         (delete-file name)
 873       (error nil))
 874     (while again
 875       (setq name (directory-file-name (file-name-directory name)))
 876       (condition-case nil
 877           (delete-directory name)
 878         (error nil))
 879       (if (string= name top) (setq again nil)))))
 880 ;; -------------------------------------------------------------------------
 881 ;; Section: Member extraction
 882
 883 (defun archive-file-name-handler (op &rest args)
 884   (or (eq op 'file-exists-p)
 885       (let ((file-name-handler-alist nil))
 886         (apply op args))))
 887
 888 (defun archive-set-buffer-as-visiting-file (filename)
 889   "Set the current buffer as if it were visiting FILENAME."
 890   (save-excursion
 891     (goto-char (point-min))
 892     (let ((buffer-undo-list t)
 893           (coding
 894            (or coding-system-for-read
 895                (and set-auto-coding-function
 896                     (save-excursion
 897                       (funcall set-auto-coding-function
 898                                filename (- (point-max) (point-min)))))
 899                ;; dos-w32.el defines the function
 900                ;; find-buffer-file-type-coding-system for DOS/Windows
 901                ;; systems which preserves the coding-system of existing files.
 902                ;; (That function is called via file-coding-system-alist.)
 903                ;; Here, we want it to act as if the extracted file existed.
 904                ;; The following let-binding of file-name-handler-alist forces
 905                ;; find-file-not-found-set-buffer-file-coding-system to ignore
 906                ;; the file's name (see dos-w32.el).
 907                (let ((file-name-handler-alist
 908                       '(("" . archive-file-name-handler))))
 909                  (car (find-operation-coding-system
 910                        'insert-file-contents
 911                        (cons filename (current-buffer)) t))))))
 912       (if (and (not coding-system-for-read)
 913                (not enable-multibyte-characters))
 914           (setq coding
 915                 (coding-system-change-text-conversion coding 'raw-text)))
 916       (if (and coding
 917                (not (eq coding 'no-conversion)))
 918           (decode-coding-region (point-min) (point-max) coding)
 919         (setq last-coding-system-used coding))
 920       (set-buffer-modified-p nil)
 921       (kill-local-variable 'buffer-file-coding-system)
 922       (after-insert-file-set-coding (- (point-max) (point-min))))))
 923
 924 (define-obsolete-function-alias 'archive-mouse-extract 'archive-extract "22.1")
 925
 926 (defun archive-extract (&optional other-window-p event)
 927   "In archive mode, extract this entry of the archive into its own buffer."
 928   (interactive (list nil last-input-event))
 929   (if event (posn-set-point (event-end event)))
 930   (let* ((view-p (eq other-window-p 'view))
 931          (descr (archive-get-descr))
 932          (ename (aref descr 0))
 933          (iname (aref descr 1))
 934          (archive-buffer (current-buffer))
 935          (arcdir default-directory)
 936          (archive (buffer-file-name))
 937          (arcname (file-name-nondirectory archive))
 938          (bufname (concat (file-name-nondirectory iname) " (" arcname ")"))
 939          (extractor (archive-name "extract"))
 940          ;; Members with file names which aren't valid for the
 941          ;; underlying filesystem, are treated as read-only.
 942          (read-only-p (or archive-read-only
 943                           view-p
 944                           (string-match file-name-invalid-regexp ename)))
 945          (arcfilename (expand-file-name (concat arcname ":" iname)))
 946          (buffer (get-buffer bufname))
 947          (just-created nil)
 948          (file-name-coding archive-file-name-coding-system))
 949       (if (and buffer
 950                (string= (buffer-file-name buffer) arcfilename))
 951           nil
 952         (setq archive (archive-maybe-copy archive))
 953         (setq bufname (generate-new-buffer-name bufname))
 954         (setq buffer (get-buffer-create bufname))
 955         (setq just-created t)
 956         (with-current-buffer buffer
 957           (setq buffer-file-name arcfilename)
 958           (setq buffer-file-truename
 959                 (abbreviate-file-name buffer-file-name))
 960           ;; Set the default-directory to the dir of the superior buffer.
 961           (setq default-directory arcdir)
 962           (make-local-variable 'archive-superior-buffer)
 963           (setq archive-superior-buffer archive-buffer)
 964           (add-hook 'write-file-functions 'archive-write-file-member nil t)
 965           (setq archive-subfile-mode descr)
 966           (setq archive-file-name-coding-system file-name-coding)
 967           (if (and
 968                (null
 969                 (let (;; We may have to encode file name arguement for
 970                       ;; external programs.
 971                       (coding-system-for-write
 972                        (and enable-multibyte-characters
 973                             archive-file-name-coding-system))
 974                       ;; We read an archive member by no-conversion at
 975                       ;; first, then decode appropriately by calling
 976                       ;; archive-set-buffer-as-visiting-file later.
 977                       (coding-system-for-read 'no-conversion))
 978                   (condition-case err
 979                       (if (fboundp extractor)
 980                           (funcall extractor archive ename)
 981                         (archive-*-extract archive ename
 982                                            (symbol-value extractor)))
 983                     (error
 984                      (ding (message "%s" (error-message-string err)))
 985                      nil))))
 986                just-created)
 987               (progn
 988                 (set-buffer-modified-p nil)
 989                 (kill-buffer buffer))
 990             (archive-set-buffer-as-visiting-file ename)
 991             (goto-char (point-min))
 992             (rename-buffer bufname)
 993             (setq buffer-read-only read-only-p)
 994             (setq buffer-undo-list nil)
 995             (set-buffer-modified-p nil)
 996             (setq buffer-saved-size (buffer-size))
 997             (normal-mode)
 998             ;; Just in case an archive occurs inside another archive.
 999             (when (derived-mode-p 'archive-mode)
1000               (setq archive-remote t)
1001               (if read-only-p (setq archive-read-only t))
1002               ;; We will write out the archive ourselves if it is
1003               ;; part of another archive.
1004               (remove-hook 'write-contents-functions 'archive-write-file t))
1005             (run-hooks 'archive-extract-hooks)
1006             (if archive-read-only
1007                 (message "Note: altering this archive is not implemented."))))
1008         (archive-maybe-update t))
1009       (or (not (buffer-name buffer))
1010           (cond
1011            (view-p (view-buffer buffer (and just-created 'kill-buffer)))
1012            ((eq other-window-p 'display) (display-buffer buffer))
1013            (other-window-p (switch-to-buffer-other-window buffer))
1014            (t (switch-to-buffer buffer))))))
1015
1016 (defun archive-*-extract (archive name command)
1017   (let* ((default-directory (file-name-as-directory archive-tmpdir))
1018          (tmpfile (expand-file-name (file-name-nondirectory name)
1019                                     default-directory))
1020          exit-status success)
1021     (make-directory (directory-file-name default-directory) t)
1022     (setq exit-status
1023           (apply 'call-process
1024                  (car command)
1025                  nil
1026                  nil
1027                  nil
1028                  (append (cdr command) (list archive name))))
1029     (cond ((and (numberp exit-status) (= exit-status 0))
1030            (if (not (file-exists-p tmpfile))
1031                (ding (message "`%s': no such file or directory" tmpfile))
1032              (insert-file-contents tmpfile)
1033              (setq success t)))
1034           ((numberp exit-status)
1035            (ding
1036             (message "`%s' exited with status %d" (car command) exit-status)))
1037           ((stringp exit-status)
1038            (ding (message "`%s' aborted: %s" (car command) exit-status)))
1039           (t
1040            (ding (message "`%s' failed" (car command)))))
1041     (archive-delete-local tmpfile)
1042     success))
1043
1044 (defun archive-extract-by-stdout (archive name command)
1045   (apply 'call-process
1046          (car command)
1047          nil
1048          t
1049          nil
1050          (append (cdr command) (list archive name))))
1051
1052 (defun archive-extract-other-window ()
1053   "In archive mode, find this member in another window."
1054   (interactive)
1055   (archive-extract t))
1056
1057 (defun archive-display-other-window ()
1058   "In archive mode, display this member in another window."
1059   (interactive)
1060   (archive-extract 'display))
1061
1062 (defun archive-view ()
1063   "In archive mode, view the member on this line."
1064   (interactive)
1065   (archive-extract 'view))
1066
1067 (defun archive-add-new-member (arcbuf name)
1068   "Add current buffer to the archive in ARCBUF naming it NAME."
1069   (interactive
1070    (list (get-buffer
1071           (read-buffer "Buffer containing archive: "
1072                        ;; Find first archive buffer and suggest that
1073                        (let ((bufs (buffer-list)))
1074                          (while (and bufs
1075                                      (not (with-current-buffer (car bufs)
1076                                             (derived-mode-p 'archive-mode))))
1077                            (setq bufs (cdr bufs)))
1078                          (if bufs
1079                              (car bufs)
1080                            (error "There are no archive buffers")))
1081                        t))
1082          (read-string "File name in archive: "
1083                       (if buffer-file-name
1084                           (file-name-nondirectory buffer-file-name)
1085                         ""))))
1086   (with-current-buffer arcbuf
1087     (or (eq major-mode 'archive-mode)
1088         (error "Buffer is not an archive buffer"))
1089     (if archive-read-only
1090         (error "Archive is read-only")))
1091   (if (eq arcbuf (current-buffer))
1092       (error "An archive buffer cannot be added to itself"))
1093   (if (string= name "")
1094       (error "Archive members may not be given empty names"))
1095   (let ((func (with-current-buffer arcbuf
1096                 (archive-name "add-new-member")))
1097         (membuf (current-buffer)))
1098     (if (fboundp func)
1099         (with-current-buffer arcbuf
1100           (funcall func buffer-file-name membuf name))
1101       (error "Adding a new member is not supported for this archive type"))))
1102 ;; -------------------------------------------------------------------------
1103 ;; Section: IO stuff
1104
1105 (defun archive-write-file-member ()
1106   (save-excursion
1107     (save-restriction
1108       (message "Updating archive...")
1109       (widen)
1110       (let ((writer  (with-current-buffer archive-superior-buffer
1111                        (archive-name "write-file-member")))
1112             (archive (with-current-buffer archive-superior-buffer
1113                        (archive-maybe-copy (buffer-file-name)))))
1114         (if (fboundp writer)
1115             (funcall writer archive archive-subfile-mode)
1116           (archive-*-write-file-member archive
1117                                        archive-subfile-mode
1118                                        (symbol-value writer)))
1119         (set-buffer-modified-p nil)
1120         (message "Updating archive...done"))
1121       (set-buffer archive-superior-buffer)
1122       (if (not archive-remote) (revert-buffer) (archive-maybe-update nil))))
1123   ;; Restore the value of last-coding-system-used, so that basic-save-buffer
1124   ;; won't reset the coding-system of this archive member.
1125   (if (local-variable-p 'archive-member-coding-system)
1126       (setq last-coding-system-used archive-member-coding-system))
1127   t)
1128
1129 (defun archive-*-write-file-member (archive descr command)
1130   (let* ((ename (aref descr 0))
1131          (tmpfile (expand-file-name ename archive-tmpdir))
1132          (top (directory-file-name (file-name-as-directory archive-tmpdir)))
1133          (default-directory (file-name-as-directory top)))
1134     (unwind-protect
1135         (progn
1136           (make-directory (file-name-directory tmpfile) t)
1137           ;; If the member is itself an archive, write it without
1138           ;; the dired-like listing we created.
1139           (if (eq major-mode 'archive-mode)
1140               (archive-write-file tmpfile)
1141             (write-region (point-min) (point-max) tmpfile nil 'nomessage))
1142           ;; basic-save-buffer needs last-coding-system-used to have
1143           ;; the value used to write the file, so save it before any
1144           ;; further processing clobbers it (we restore it in
1145           ;; archive-write-file-member, above).
1146           (setq archive-member-coding-system last-coding-system-used)
1147           (if (aref descr 3)
1148               ;; Set the file modes, but make sure we can read it.
1149               (set-file-modes tmpfile (logior ?\400 (aref descr 3))))
1150           (setq ename
1151                 (encode-coding-string ename archive-file-name-coding-system))
1152           (let* ((coding-system-for-write 'no-conversion)
1153                  (exitcode (apply 'call-process
1154                                   (car command)
1155                                   nil
1156                                   nil
1157                                   nil
1158                                   (append (cdr command)
1159                                           (list archive ename)))))
1160             (if (equal exitcode 0)
1161                 nil
1162               (error "Updating was unsuccessful (%S)" exitcode))))
1163       (archive-delete-local tmpfile))))
1164
1165 (defun archive-write-file (&optional file)
1166   (save-excursion
1167     (let ((coding-system-for-write 'no-conversion))
1168       (write-region archive-proper-file-start (point-max)
1169                     (or file buffer-file-name) nil t)
1170       (set-buffer-modified-p nil))
1171     t))
1172 ;; -------------------------------------------------------------------------
1173 ;; Section: Marking and unmarking.
1174
1175 (defun archive-flag-deleted (p &optional type)
1176   "In archive mode, mark this member to be deleted from the archive.
1177 With a prefix argument, mark that many files."
1178   (interactive "p")
1179   (or type (setq type ?D))
1180   (beginning-of-line)
1181   (let ((sign (if (>= p 0) +1 -1))
1182         (modified (buffer-modified-p))
1183         (inhibit-read-only t))
1184     (while (not (zerop p))
1185       (if (archive-get-descr t)
1186           (progn
1187             (delete-char 1)
1188             (insert type)))
1189       (forward-line sign)
1190       (setq p (- p sign)))
1191     (restore-buffer-modified-p modified))
1192   (archive-next-line 0))
1193
1194 (defun archive-unflag (p)
1195   "In archive mode, un-mark this member if it is marked to be deleted.
1196 With a prefix argument, un-mark that many files forward."
1197   (interactive "p")
1198   (archive-flag-deleted p ?\s))
1199
1200 (defun archive-unflag-backwards (p)
1201   "In archive mode, un-mark this member if it is marked to be deleted.
1202 With a prefix argument, un-mark that many members backward."
1203   (interactive "p")
1204   (archive-flag-deleted (- p) ?\s))
1205
1206 (defun archive-unmark-all-files ()
1207   "Remove all marks."
1208   (interactive)
1209   (let ((modified (buffer-modified-p))
1210         (inhibit-read-only t))
1211     (save-excursion
1212       (goto-char archive-file-list-start)
1213       (while (< (point) archive-file-list-end)
1214         (or (= (following-char) ?\s)
1215             (progn (delete-char 1) (insert ?\s)))
1216         (forward-line 1)))
1217     (restore-buffer-modified-p modified)))
1218
1219 (defun archive-mark (p)
1220   "In archive mode, mark this member for group operations.
1221 With a prefix argument, mark that many members.
1222 Use \\[archive-unmark-all-files] to remove all marks."
1223   (interactive "p")
1224   (archive-flag-deleted p ?*))
1225
1226 (defun archive-get-marked (mark &optional default)
1227   (let (files)
1228     (save-excursion
1229       (goto-char archive-file-list-start)
1230       (while (< (point) archive-file-list-end)
1231         (if (= (following-char) mark)
1232             (setq files (cons (archive-get-descr) files)))
1233         (forward-line 1)))
1234     (or (nreverse files)
1235         (and default
1236              (list (archive-get-descr))))))
1237 ;; -------------------------------------------------------------------------
1238 ;; Section: Operate
1239
1240 (defun archive-next-line (p)
1241   (interactive "p")
1242   (forward-line p)
1243   (or (eobp)
1244       (forward-char archive-file-name-indent)))
1245
1246 (defun archive-previous-line (p)
1247   (interactive "p")
1248   (archive-next-line (- p)))
1249
1250 (defun archive-chmod-entry (new-mode)
1251   "Change the protection bits associated with all marked or this member.
1252 The new protection bits can either be specified as an octal number or
1253 as a relative change like \"g+rw\" as for chmod(2)."
1254   (interactive "sNew mode (octal or relative): ")
1255   (if archive-read-only (error "Archive is read-only"))
1256   (let ((func (archive-name "chmod-entry")))
1257     (if (fboundp func)
1258         (progn
1259           (funcall func new-mode (archive-get-marked ?* t))
1260           (archive-resummarize))
1261       (error "Setting mode bits is not supported for this archive type"))))
1262
1263 (defun archive-chown-entry (new-uid)
1264   "Change the owner of all marked or this member."
1265   (interactive "nNew uid: ")
1266   (if archive-read-only (error "Archive is read-only"))
1267   (let ((func (archive-name "chown-entry")))
1268     (if (fboundp func)
1269         (progn
1270           (funcall func new-uid (archive-get-marked ?* t))
1271           (archive-resummarize))
1272       (error "Setting owner is not supported for this archive type"))))
1273
1274 (defun archive-chgrp-entry (new-gid)
1275   "Change the group of all marked or this member."
1276   (interactive "nNew gid: ")
1277   (if archive-read-only (error "Archive is read-only"))
1278   (let ((func (archive-name "chgrp-entry")))
1279     (if (fboundp func)
1280         (progn
1281           (funcall func new-gid (archive-get-marked ?* t))
1282           (archive-resummarize))
1283       (error "Setting group is not supported for this archive type"))))
1284
1285 (defun archive-expunge ()
1286   "Do the flagged deletions."
1287   (interactive)
1288   (let (files)
1289     (save-excursion
1290       (goto-char archive-file-list-start)
1291       (while (< (point) archive-file-list-end)
1292         (if (= (following-char) ?D)
1293             (setq files (cons (aref (archive-get-descr) 0) files)))
1294         (forward-line 1)))
1295     (setq files (nreverse files))
1296     (and files
1297          (or (not archive-read-only)
1298              (error "Archive is read-only"))
1299          (or (yes-or-no-p (format "Really delete %d member%s? "
1300                                   (length files)
1301                                   (if (null (cdr files)) "" "s")))
1302              (error "Operation aborted"))
1303          (let ((archive (archive-maybe-copy (buffer-file-name)))
1304                (expunger (archive-name "expunge")))
1305            (if (fboundp expunger)
1306                (funcall expunger archive files)
1307              (archive-*-expunge archive files (symbol-value expunger)))
1308            (archive-maybe-update nil)
1309            (if archive-remote
1310                (archive-resummarize)
1311              (revert-buffer))))))
1312
1313 (defun archive-*-expunge (archive files command)
1314   (apply 'call-process
1315          (car command)
1316          nil
1317          nil
1318          nil
1319          (append (cdr command) (cons archive files))))
1320
1321 (defun archive-rename-entry (newname)
1322   "Change the name associated with this entry in the archive file."
1323   (interactive "sNew name: ")
1324   (if archive-read-only (error "Archive is read-only"))
1325   (if (string= newname "")
1326       (error "Archive members may not be given empty names"))
1327   (let ((func (archive-name "rename-entry"))
1328         (descr (archive-get-descr)))
1329     (if (fboundp func)
1330         (progn
1331           (funcall func
1332                    (encode-coding-string newname
1333                                          archive-file-name-coding-system)
1334                    descr)
1335           (archive-resummarize))
1336       (error "Renaming is not supported for this archive type"))))
1337
1338 ;; Revert the buffer and recompute the dired-like listing.
1339 (defun archive-mode-revert (&optional no-auto-save no-confirm)
1340   (let ((no (archive-get-lineno)))
1341     (setq archive-files nil)
1342     (let ((revert-buffer-function nil)
1343           (coding-system-for-read 'no-conversion))
1344       (revert-buffer t t))
1345     (archive-mode)
1346     (goto-char archive-file-list-start)
1347     (archive-next-line no)))
1348
1349 (defun archive-undo ()
1350   "Undo in an archive buffer.
1351 This doesn't recover lost files, it just undoes changes in the buffer itself."
1352   (interactive)
1353   (let ((inhibit-read-only t))
1354     (undo)))
1355 ;; -------------------------------------------------------------------------
1356 ;; Section: Arc Archives
1357
1358 (defun archive-arc-summarize ()
1359   (let ((p 1)
1360         (totalsize 0)
1361         (maxlen 8)
1362         files
1363         visual)
1364     (while (and (< (+ p 29) (point-max))
1365                 (= (byte-after p) ?\C-z)
1366                 (> (byte-after (1+ p)) 0))
1367       (let* ((namefld (buffer-substring (+ p 2) (+ p 2 13)))
1368              (fnlen   (or (string-match "\0" namefld) 13))
1369              (efnname (decode-coding-string (substring namefld 0 fnlen)
1370                                             archive-file-name-coding-system))
1371              ;; Convert to float to avoid overflow for very large files.
1372              (csize   (archive-l-e (+ p 15) 4 'float))
1373              (moddate (archive-l-e (+ p 19) 2))
1374              (modtime (archive-l-e (+ p 21) 2))
1375              (ucsize  (archive-l-e (+ p 25) 4 'float))
1376              (fiddle  (string= efnname (upcase efnname)))
1377              (ifnname (if fiddle (downcase efnname) efnname))
1378              (text    (format "  %8.0f  %-11s  %-8s  %s"
1379                               ucsize
1380                               (archive-dosdate moddate)
1381                               (archive-dostime modtime)
1382                               ifnname)))
1383         (setq maxlen (max maxlen fnlen)
1384               totalsize (+ totalsize ucsize)
1385               visual (cons (vector text
1386                                    (- (length text) (length ifnname))
1387                                    (length text))
1388                            visual)
1389               files (cons (vector efnname ifnname fiddle nil (1- p))
1390                           files)
1391               ;; p needs to stay an integer, since we use it in char-after
1392               ;; above.  Passing through `round' limits the compressed size
1393               ;; to most-positive-fixnum, but if the compressed size exceeds
1394               ;; that, we cannot visit the archive anyway.
1395               p (+ p 29 (round csize)))))
1396     (goto-char (point-min))
1397     (let ((dash (concat "- --------  -----------  --------  "
1398                         (make-string maxlen ?-)
1399                         "\n")))
1400       (insert "M   Length  Date         Time      File\n"
1401               dash)
1402       (archive-summarize-files (nreverse visual))
1403       (insert dash
1404               (format "  %8.0f                         %d file%s"
1405                       totalsize
1406                       (length files)
1407                       (if (= 1 (length files)) "" "s"))
1408               "\n"))
1409     (apply 'vector (nreverse files))))
1410
1411 (defun archive-arc-rename-entry (newname descr)
1412   (if (string-match "[:\\\\/]" newname)
1413       (error "File names in arc files must not contain a directory component"))
1414   (if (> (length newname) 12)
1415       (error "File names in arc files are limited to 12 characters"))
1416   (let ((name (concat newname (substring "\0\0\0\0\0\0\0\0\0\0\0\0\0"
1417                                          (length newname))))
1418         (inhibit-read-only t))
1419     (save-restriction
1420       (save-excursion
1421         (widen)
1422         (goto-char (+ archive-proper-file-start (aref descr 4) 2))
1423         (delete-char 13)
1424         (insert-unibyte name)))))
1425 ;; -------------------------------------------------------------------------
1426 ;; Section: Lzh Archives
1427
1428 (defun archive-lzh-summarize (&optional start)
1429   (let ((p (or start 1)) ;; 1 for .lzh, something further on for .exe
1430         (totalsize 0)
1431         (maxlen 8)
1432         files
1433         visual)
1434     (while (progn (goto-char p)         ;beginning of a base header.
1435                   (looking-at "\\(.\\|\n\\)\\(.\\|\n\\)-l[hz][0-9ds]-"))
1436       (let* ((hsize   (byte-after p))   ;size of the base header (level 0 and 1)
1437              ;; Convert to float to avoid overflow for very large files.
1438              (csize   (archive-l-e (+ p 7) 4 'float)) ;size of a compressed file to follow (level 0 and 2),
1439                                         ;size of extended headers + the compressed file to follow (level 1).
1440              (ucsize  (archive-l-e (+ p 11) 4 'float))  ;size of an uncompressed file.
1441              (time1   (archive-l-e (+ p 15) 2)) ;date/time (MSDOS format in level 0, 1 headers
1442              (time2   (archive-l-e (+ p 17) 2)) ;and UNIX format in level 2 header.)
1443              (hdrlvl  (byte-after (+ p 20))) ;header level
1444              thsize             ;total header size (base + extensions)
1445              fnlen efnname osid fiddle ifnname width p2
1446              neh        ;beginning of next extension header (level 1 and 2)
1447              mode modestr uid gid text dir prname
1448              gname uname modtime moddate)
1449         (if (= hdrlvl 3) (error "can't handle lzh level 3 header type"))
1450         (when (or (= hdrlvl 0) (= hdrlvl 1))
1451           (setq fnlen   (byte-after (+ p 21))) ;filename length
1452           (setq efnname (let ((str (buffer-substring (+ p 22) (+ p 22 fnlen)))) ;filename from offset 22
1453                         (decode-coding-string
1454                          str archive-file-name-coding-system)))
1455           (setq p2      (+ p 22 fnlen))) ;
1456         (if (= hdrlvl 1)
1457             (setq neh (+ p2 3))         ;specific to level 1 header
1458           (if (= hdrlvl 2)
1459               (setq neh (+ p 24))))     ;specific to level 2 header
1460         (if neh         ;if level 1 or 2 we expect extension headers to follow
1461             (let* ((ehsize (archive-l-e neh 2)) ;size of the extension header
1462                    (etype (byte-after (+ neh 2)))) ;extension type
1463               (while (not (= ehsize 0))
1464                   (cond
1465                  ((= etype 1)   ;file name
1466                   (let ((i (+ neh 3)))
1467                     (while (< i (+ neh ehsize))
1468                       (setq efnname (concat efnname (char-to-string (byte-after i))))
1469                       (setq i (1+ i)))))
1470                  ((= etype 2)   ;directory name
1471                   (let ((i (+ neh 3)))
1472                     (while (< i (+ neh ehsize))
1473                                     (setq dir (concat dir
1474                                                        (if (= (byte-after i)
1475                                                               255)
1476                                                            "/"
1477                                                          (char-to-string
1478                                                           (char-after i)))))
1479                                     (setq i (1+ i)))))
1480                  ((= etype 80)          ;Unix file permission
1481                   (setq mode (archive-l-e (+ neh 3) 2)))
1482                  ((= etype 81)          ;UNIX file group/user ID
1483                   (progn (setq uid (archive-l-e (+ neh 3) 2))
1484                          (setq gid (archive-l-e (+ neh 5) 2))))
1485                  ((= etype 82)          ;UNIX file group name
1486                   (let ((i (+ neh 3)))
1487                     (while (< i (+ neh ehsize))
1488                       (setq gname (concat gname (char-to-string (char-after i))))
1489                       (setq i (1+ i)))))
1490                  ((= etype 83)          ;UNIX file user name
1491                   (let ((i (+ neh 3)))
1492                     (while (< i (+ neh ehsize))
1493                       (setq uname (concat uname (char-to-string (char-after i))))
1494                       (setq i (1+ i)))))
1495                    )
1496                 (setq neh (+ neh ehsize))
1497                 (setq ehsize (archive-l-e neh 2))
1498                 (setq etype (byte-after (+ neh 2))))
1499               ;;get total header size for level 1 and 2 headers
1500               (setq thsize (- neh p))))
1501         (if (= hdrlvl 0)  ;total header size
1502             (setq thsize hsize))
1503         ;; OS ID field not present in level 0 header, use code 0 "generic"
1504         ;; in that case as per lha program header.c get_header()
1505         (setq osid (cond ((= hdrlvl 0)  0)
1506                          ((= hdrlvl 1)  (char-after (+ p 22 fnlen 2)))
1507                          ((= hdrlvl 2)  (char-after (+ p 23)))))
1508         ;; Filename fiddling must follow the lha program, otherwise the name
1509         ;; passed to "lha pq" etc won't match (which for an extract silently
1510         ;; results in no output).  As of version 1.14i it goes from the OS ID,
1511         ;; - For 'M' MSDOS: msdos_to_unix_filename() downcases always, and
1512         ;;   converts "\" to "/".
1513         ;; - For 0 generic: generic_to_unix_filename() downcases if there's
1514         ;;   no lower case already present, and converts "\" to "/".
1515         ;; - For 'm' MacOS: macos_to_unix_filename() changes "/" to ":" and
1516         ;;   ":" to "/"
1517         (setq fiddle (cond ((= ?M osid) t)
1518                            ((= 0 osid)  (string= efnname (upcase efnname)))))
1519         (setq ifnname (if fiddle (downcase efnname) efnname))
1520         (setq prname (if dir (concat dir ifnname) ifnname))
1521         (setq width (if prname (string-width prname) 0))
1522         (setq modestr (if mode (archive-int-to-mode mode) "??????????"))
1523         (setq moddate (if (= hdrlvl 2)
1524                           (archive-unixdate time1 time2) ;level 2 header in UNIX format
1525                         (archive-dosdate time2))) ;level 0 and 1 header in DOS format
1526         (setq modtime (if (= hdrlvl 2)
1527                           (archive-unixtime time1 time2)
1528                         (archive-dostime time1)))
1529         (setq text    (if archive-alternate-display
1530                           (format "  %8.0f  %5S  %5S  %s"
1531                                   ucsize
1532                                   (or uid "?")
1533                                   (or gid "?")
1534                                   ifnname)
1535                         (format "  %10s  %8.0f  %-11s  %-8s  %s"
1536                                 modestr
1537                                 ucsize
1538                                 moddate
1539                                 modtime
1540                                 prname)))
1541         (setq maxlen (max maxlen width)
1542               totalsize (+ totalsize ucsize)
1543               visual (cons (vector text
1544                                    (- (length text) (length prname))
1545                                    (length text))
1546                            visual)
1547               files (cons (vector prname ifnname fiddle mode (1- p))
1548                           files))
1549         (cond ((= hdrlvl 1)
1550                ;; p needs to stay an integer, since we use it in goto-char
1551                ;; above.  Passing through `round' limits the compressed size
1552                ;; to most-positive-fixnum, but if the compressed size exceeds
1553                ;; that, we cannot visit the archive anyway.
1554                (setq p (+ p hsize 2 (round csize))))
1555               ((or (= hdrlvl 2) (= hdrlvl 0))
1556                (setq p (+ p thsize 2 (round csize)))))
1557         ))
1558     (goto-char (point-min))
1559     (let ((dash (concat (if archive-alternate-display
1560                             "- --------  -----  -----  "
1561                           "- ----------  --------  -----------  --------  ")
1562                         (make-string maxlen ?-)
1563                         "\n"))
1564           (header (if archive-alternate-display
1565                        "M   Length    Uid    Gid  File\n"
1566                     "M   Filemode    Length  Date         Time      File\n"))
1567           (sumline (if archive-alternate-display
1568                        "  %8.0f                %d file%s"
1569                      "              %8.0f                         %d file%s")))
1570       (insert header dash)
1571       (archive-summarize-files (nreverse visual))
1572       (insert dash
1573               (format sumline
1574                       totalsize
1575                       (length files)
1576                       (if (= 1 (length files)) "" "s"))
1577               "\n"))
1578     (apply 'vector (nreverse files))))
1579
1580 (defconst archive-lzh-alternate-display t)
1581
1582 (defun archive-lzh-extract (archive name)
1583   (archive-extract-by-stdout archive name archive-lzh-extract))
1584
1585 (defun archive-lzh-resum (p count)
1586   (let ((sum 0))
1587     (while (> count 0)
1588       (setq count (1- count)
1589             sum (+ sum (byte-after p))
1590             p (1+ p)))
1591     (logand sum 255)))
1592
1593 (defun archive-lzh-rename-entry (newname descr)
1594   (save-restriction
1595     (save-excursion
1596       (widen)
1597       (let* ((p        (+ archive-proper-file-start (aref descr 4)))
1598              (oldhsize (byte-after p))
1599              (oldfnlen (byte-after (+ p 21)))
1600              (newfnlen (length newname))
1601              (newhsize (+ oldhsize newfnlen (- oldfnlen)))
1602              (inhibit-read-only t))
1603         (if (> newhsize 255)
1604             (error "The file name is too long"))
1605         (goto-char (+ p 21))
1606         (delete-char (1+ oldfnlen))
1607         (insert-unibyte newfnlen newname)
1608         (goto-char p)
1609         (delete-char 2)
1610         (insert-unibyte newhsize (archive-lzh-resum p newhsize))))))
1611
1612 (defun archive-lzh-ogm (newval files errtxt ofs)
1613   (save-excursion
1614     (save-restriction
1615       (widen)
1616       (dolist (fil files)
1617         (let* ((p (+ archive-proper-file-start (aref fil 4)))
1618                (hsize   (byte-after p))
1619                (fnlen   (byte-after (+ p 21)))
1620                (p2      (+ p 22 fnlen))
1621                (creator (if (>= (- hsize fnlen) 24) (byte-after (+ p2 2)) 0))
1622                (inhibit-read-only t))
1623           (if (= creator ?U)
1624               (progn
1625                 (or (numberp newval)
1626                     (setq newval (funcall newval (archive-l-e (+ p2 ofs) 2))))
1627                 (goto-char (+ p2 ofs))
1628                 (delete-char 2)
1629                 (insert-unibyte (logand newval 255) (lsh newval -8))
1630                 (goto-char (1+ p))
1631                 (delete-char 1)
1632                 (insert-unibyte (archive-lzh-resum (1+ p) hsize)))
1633             (message "Member %s does not have %s field"
1634                      (aref fil 1) errtxt)))))))
1635
1636 (defun archive-lzh-chown-entry (newuid files)
1637   (archive-lzh-ogm newuid files "an uid" 10))
1638
1639 (defun archive-lzh-chgrp-entry (newgid files)
1640   (archive-lzh-ogm newgid files "a gid" 12))
1641
1642 (defun archive-lzh-chmod-entry (newmode files)
1643   (archive-lzh-ogm
1644    ;; This should work even though newmode will be dynamically accessed.
1645    (lambda (old) (archive-calc-mode old newmode t))
1646    files "a unix-style mode" 8))
1647
1648 ;; -------------------------------------------------------------------------
1649 ;; Section: Lzh Self-Extracting .exe Archives
1650 ;;
1651 ;; No support for modifying these files.  It looks like the lha for unix
1652 ;; program (as of version 1.14i) can't create or retain the DOS exe part.
1653 ;; If you do an "lha a" on a .exe for instance it renames and writes to a
1654 ;; plain .lzh.
1655
1656 (defun archive-lzh-exe-summarize ()
1657   "Summarize the contents of an LZH self-extracting exe, for `archive-mode'."
1658
1659   ;; Skip the initial executable code part and apply archive-lzh-summarize
1660   ;; to the archive part proper.  The "-lh5-" etc regexp here for the start
1661   ;; is the same as in archive-find-type.
1662   ;;
1663   ;; The lha program (version 1.14i) does this in skip_msdos_sfx1_code() by
1664   ;; a similar scan.  It looks for "..-l..-" plus for level 0 or 1 a test of
1665   ;; the header checksum, or level 2 a test of the "attribute" and size.
1666   ;;
1667   (re-search-forward "..-l[hz][0-9ds]-" nil)
1668   (archive-lzh-summarize (match-beginning 0)))
1669
1670 ;; `archive-lzh-extract' runs "lha pq", and that works for .exe as well as
1671 ;; .lzh files
1672 (defalias 'archive-lzh-exe-extract 'archive-lzh-extract
1673   "Extract a member from an LZH self-extracting exe, for `archive-mode'.")
1674
1675 ;; -------------------------------------------------------------------------
1676 ;; Section: Zip Archives
1677
1678 (defun archive-zip-summarize ()
1679   (goto-char (- (point-max) (- 22 18)))
1680   (search-backward-regexp "[P]K\005\006")
1681   (let ((p (+ (point-min) (archive-l-e (+ (point) 16) 4)))
1682         (maxlen 8)
1683         (totalsize 0)
1684         files
1685         visual)
1686     (while (string= "PK\001\002" (buffer-substring p (+ p 4)))
1687       (let* ((creator (byte-after (+ p 5)))
1688              ;; (method  (archive-l-e (+ p 10) 2))
1689              (modtime (archive-l-e (+ p 12) 2))
1690              (moddate (archive-l-e (+ p 14) 2))
1691              ;; Convert to float to avoid overflow for very large files.
1692              (ucsize  (archive-l-e (+ p 24) 4 'float))
1693              (fnlen   (archive-l-e (+ p 28) 2))
1694              (exlen   (archive-l-e (+ p 30) 2))
1695              (fclen   (archive-l-e (+ p 32) 2))
1696              (lheader (archive-l-e (+ p 42) 4))
1697              (efnname (let ((str (buffer-substring (+ p 46) (+ p 46 fnlen))))
1698                         (decode-coding-string
1699                          str archive-file-name-coding-system)))
1700              (isdir   (and (= ucsize 0)
1701                            (string= (file-name-nondirectory efnname) "")))
1702              (mode    (cond ((memq creator '(2 3)) ; Unix + VMS
1703                              (archive-l-e (+ p 40) 2))
1704                             ((memq creator '(0 5 6 7 10 11 15)) ; Dos etc.
1705                              (logior ?\444
1706                                      (if isdir (logior 16384 ?\111) 0)
1707                                      (if (zerop
1708                                           (logand 1 (byte-after (+ p 38))))
1709                                          ?\222 0)))
1710                             (t nil)))
1711              (modestr (if mode (archive-int-to-mode mode) "??????????"))
1712              (fiddle  (and archive-zip-case-fiddle
1713                            (not (not (memq creator '(0 2 4 5 9))))
1714                            (string= (upcase efnname) efnname)))
1715              (ifnname (if fiddle (downcase efnname) efnname))
1716              (width (string-width ifnname))
1717              (text    (format "  %10s  %8.0f  %-11s  %-8s  %s"
1718                               modestr
1719                               ucsize
1720                               (archive-dosdate moddate)
1721                               (archive-dostime modtime)
1722                               ifnname)))
1723         (setq maxlen (max maxlen width)
1724               totalsize (+ totalsize ucsize)
1725               visual (cons (vector text
1726                                    (- (length text) (length ifnname))
1727                                    (length text))
1728                            visual)
1729               files (cons (if isdir
1730                               nil
1731                             (vector efnname ifnname fiddle mode
1732                                     (list (1- p) lheader)))
1733                           files)
1734               p (+ p 46 fnlen exlen fclen))))
1735     (goto-char (point-min))
1736     (let ((dash (concat "- ----------  --------  -----------  --------  "
1737                         (make-string maxlen ?-)
1738                         "\n")))
1739       (insert "M Filemode      Length  Date         Time      File\n"
1740               dash)
1741       (archive-summarize-files (nreverse visual))
1742       (insert dash
1743               (format "              %8.0f                         %d file%s"
1744                       totalsize
1745                       (length files)
1746                       (if (= 1 (length files)) "" "s"))
1747               "\n"))
1748     (apply 'vector (nreverse files))))
1749
1750 (defun archive-zip-extract (archive name)
1751   (if (equal (car archive-zip-extract) "pkzip")
1752       (archive-*-extract archive name archive-zip-extract)
1753     (archive-extract-by-stdout archive name archive-zip-extract)))
1754
1755 (defun archive-zip-write-file-member (archive descr)
1756   (archive-*-write-file-member
1757    archive
1758    descr
1759    (if (aref descr 2) archive-zip-update-case archive-zip-update)))
1760
1761 (defun archive-zip-chmod-entry (newmode files)
1762   (save-restriction
1763     (save-excursion
1764       (widen)
1765       (dolist (fil files)
1766         (let* ((p (+ archive-proper-file-start (car (aref fil 4))))
1767                (creator (byte-after (+ p 5)))
1768                (oldmode (aref fil 3))
1769                (newval  (archive-calc-mode oldmode newmode t))
1770                (inhibit-read-only t))
1771           (cond ((memq creator '(2 3)) ; Unix + VMS
1772                  (goto-char (+ p 40))
1773                  (delete-char 2)
1774                  (insert-unibyte (logand newval 255) (lsh newval -8)))
1775                 ((memq creator '(0 5 6 7 10 11 15)) ; Dos etc.
1776                  (goto-char (+ p 38))
1777                  (insert-unibyte (logior (logand (byte-after (point)) 254)
1778                                          (logand (logxor 1 (lsh newval -7)) 1)))
1779                  (delete-char 1))
1780                 (t (message "Don't know how to change mode for this member"))))
1781         ))))
1782 ;; -------------------------------------------------------------------------
1783 ;; Section: Zoo Archives
1784
1785 (defun archive-zoo-summarize ()
1786   (let ((p (1+ (archive-l-e 25 4)))
1787         (maxlen 8)
1788         (totalsize 0)
1789         files
1790         visual)
1791     (while (and (string= "\334\247\304\375" (buffer-substring p (+ p 4)))
1792                 (> (archive-l-e (+ p 6) 4) 0))
1793       (let* ((next    (1+ (archive-l-e (+ p 6) 4)))
1794              (moddate (archive-l-e (+ p 14) 2))
1795              (modtime (archive-l-e (+ p 16) 2))
1796              ;; Convert to float to avoid overflow for very large files.
1797              (ucsize  (archive-l-e (+ p 20) 4 'float))
1798              (namefld (buffer-substring (+ p 38) (+ p 38 13)))
1799              (dirtype (byte-after (+ p 4)))
1800              (lfnlen  (if (= dirtype 2) (byte-after (+ p 56)) 0))
1801              (ldirlen (if (= dirtype 2) (byte-after (+ p 57)) 0))
1802              (fnlen   (or (string-match "\0" namefld) 13))
1803              (efnname (let ((str
1804                              (concat
1805                               (if (> ldirlen 0)
1806                                   (concat (buffer-substring
1807                                            (+ p 58 lfnlen)
1808                                            (+ p 58 lfnlen ldirlen -1))
1809                                           "/")
1810                                 "")
1811                               (if (> lfnlen 0)
1812                                   (buffer-substring (+ p 58)
1813                                                     (+ p 58 lfnlen -1))
1814                                 (substring namefld 0 fnlen)))))
1815                         (decode-coding-string
1816                          str archive-file-name-coding-system)))
1817              (fiddle  (and (= lfnlen 0) (string= efnname (upcase efnname))))
1818              (ifnname (if fiddle (downcase efnname) efnname))
1819              (width (string-width ifnname))
1820              (text    (format "  %8.0f  %-11s  %-8s  %s"
1821                               ucsize
1822                               (archive-dosdate moddate)
1823                               (archive-dostime modtime)
1824                               ifnname)))
1825         (setq maxlen (max maxlen width)
1826               totalsize (+ totalsize ucsize)
1827               visual (cons (vector text
1828                                    (- (length text) (length ifnname))
1829                                    (length text))
1830                            visual)
1831               files (cons (vector efnname ifnname fiddle nil (1- p))
1832                           files)
1833               p next)))
1834     (goto-char (point-min))
1835     (let ((dash (concat "- --------  -----------  --------  "
1836                         (make-string maxlen ?-)
1837                         "\n")))
1838       (insert "M   Length  Date         Time      File\n"
1839               dash)
1840       (archive-summarize-files (nreverse visual))
1841       (insert dash
1842               (format "  %8.0f                         %d file%s"
1843                       totalsize
1844                       (length files)
1845                       (if (= 1 (length files)) "" "s"))
1846               "\n"))
1847     (apply 'vector (nreverse files))))
1848
1849 (defun archive-zoo-extract (archive name)
1850   (archive-extract-by-stdout archive name archive-zoo-extract))
1851 ;; -------------------------------------------------------------------------
1852 ;; This line was a mistake; it is kept now for compatibility.
1853 ;; rms  15 Oct 98
1854 (provide 'archive-mode)
1855
1856 (provide 'arc-mode)
1857
1858 ;; arch-tag: e5966a01-35ec-4f27-8095-a043a79b457b
1859 ;;; arc-mode.el ends here