lisp/arc-mode.el

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