lisp/arc-mode.el

   1 ;;; arc-mode.el --- simple editing of archives
   2
   3 ;; Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc.
   4
   5 ;; Author: Morten Welinder <terra@diku.dk>
   6 ;; Keywords: archives msdog editing major-mode
   7 ;; Favourite-brand-of-beer: None, I hate beer.
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 2, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24 ;; Boston, MA 02111-1307, USA.
  25
  26 ;;; Commentary:
  27
  28 ;; NAMING: "arc" is short for "archive" and does not refer specifically
  29 ;; to files whose name end in ".arc"
  30 ;;
  31 ;; This code does not decode any files internally, although it does
  32 ;; understand the directory level of the archives.  For this reason,
  33 ;; you should expect this code to need more fiddling than tar-mode.el
  34 ;; (although it at present has fewer bugs :-)  In particular, I have
  35 ;; not tested this under Ms-Dog myself.
  36 ;; -------------------------------------
  37 ;; INTERACTION: arc-mode.el should play together with
  38 ;;
  39 ;; * ange-ftp.el: Remote archives (i.e., ones that ange-ftp has brought
  40 ;;                to you) are handled by doing all updates on a local
  41 ;;                copy.  When you make changes to a remote file the
  42 ;;                changes will first take effect when the archive buffer
  43 ;;                is saved.  You will be warned about this.
  44 ;;
  45 ;; * dos-fns.el:  (Part of Emacs 19).  You get automatic ^M^J <--> ^J
  46 ;;                conversion.
  47 ;;
  48 ;; arc-mode.el does not work well with crypt++.el; for the archives as
  49 ;; such this could be fixed (but wouldn't be useful) by declaring such
  50 ;; archives to be "remote".  For the members this is a general Emacs
  51 ;; problem that 19.29's file formats may fix.
  52 ;; -------------------------------------
  53 ;; ARCHIVE TYPES: Currently only the archives below are handled, but the
  54 ;; structure for handling just about anything is in place.
  55 ;;
  56 ;;                        Arc     Lzh     Zip     Zoo
  57 ;;                        --------------------------------
  58 ;; View listing           Intern  Intern  Intern  Intern
  59 ;; Extract member         Y       Y       Y       Y
  60 ;; Save changed member    Y       Y       Y       Y
  61 ;; Add new member         N       N       N       N
  62 ;; Delete member          Y       Y       Y       Y
  63 ;; Rename member          Y       Y       N       N
  64 ;; Chmod                  -       Y       Y       -
  65 ;; Chown                  -       Y       -       -
  66 ;; Chgrp                  -       Y       -       -
  67 ;;
  68 ;; Special thanks to Bill Brodie <wbrodie@panix.com> for very useful tips
  69 ;; on the first released version of this package.
  70 ;;
  71 ;; This code is partly based on tar-mode.el from Emacs.
  72 ;; -------------------------------------
  73 ;; ARCHIVE STRUCTURES:
  74 ;; (This is mostly for myself.)
  75 ;;
  76 ;; ARC         A series of (header,file).  No interactions among members.
  77 ;;
  78 ;; LZH         A series of (header,file).  Headers are checksummed.  No
  79 ;;             interaction among members.
  80 ;;
  81 ;; ZIP         A series of (lheader,fil) followed by a "central directory"
  82 ;;             which is a series of (cheader) followed by an end-of-
  83 ;;             central-dir record possibly followed by junk.  The e-o-c-d
  84 ;;             links to c-d.  cheaders link to lheaders which are basically
  85 ;;             cut-down versions of the cheaders.
  86 ;;
  87 ;; ZOO         An archive header followed by a series of (header,file).
  88 ;;             Each member header points to the next.  The archive is
  89 ;;             terminated by a bogus header with a zero next link.
  90 ;; -------------------------------------
  91 ;; HOOKS: `foo' means one of the supported archive types.
  92 ;;
  93 ;; archive-mode-hook
  94 ;; archive-foo-mode-hook
  95 ;; archive-extract-hooks
  96
  97 ;;; Code:
  98
  99 ;; -------------------------------------------------------------------------
 100 ;; Section: Configuration.
 101
 102 (defgroup archive nil
 103   "Simple editing of archives."
 104   :group 'data)
 105
 106 (defgroup archive-arc nil
 107   "ARC-specific options to archive."
 108   :group 'archive)
 109
 110 (defgroup archive-lzh nil
 111   "LZH-specific options to archive."
 112   :group 'archive)
 113
 114 (defgroup archive-zip nil
 115   "ZIP-specific options to archive."
 116   :group 'archive)
 117
 118 (defgroup archive-zoo nil
 119   "ZOO-specific options to archive."
 120   :group 'archive)
 121
 122 (defcustom archive-tmpdir
 123   ;; make-temp-name is safe here because we use this name
 124   ;; to create a directory.
 125   (make-temp-name
 126    (expand-file-name (if (eq system-type 'ms-dos) "ar" "archive.tmp")
 127                      temporary-file-directory))
 128   "*Directory for temporary files made by arc-mode.el"
 129   :type 'directory
 130   :group 'archive)
 131
 132 (defcustom archive-remote-regexp "^/[^/:]*[^/:.]:"
 133   "*Regexp recognizing archive files names that are not local.
 134 A non-local file is one whose file name is not proper outside Emacs.
 135 A local copy of the archive will be used when updating."
 136   :type 'regexp
 137   :group 'archive)
 138
 139 (defcustom archive-extract-hooks nil
 140   "*Hooks to run when an archive member has been extracted."
 141   :type 'hook
 142   :group 'archive)
 143 ;; ------------------------------
 144 ;; Arc archive configuration
 145
 146 ;; We always go via a local file since there seems to be no reliable way
 147 ;; to extract to stdout without junk getting added.
 148 (defcustom archive-arc-extract
 149   '("arc" "x")
 150   "*Program and its options to run in order to extract an arc file member.
 151 Extraction should happen to the current directory.  Archive and member
 152 name will be added."
 153   :type '(list (string :tag "Program")
 154                 (repeat :tag "Options"
 155                         :inline t
 156                         (string :format "%v")))
 157   :group 'archive-arc)
 158
 159 (defcustom archive-arc-expunge
 160   '("arc" "d")
 161   "*Program and its options to run in order to delete arc file members.
 162 Archive and member names will be added."
 163   :type '(list (string :tag "Program")
 164                 (repeat :tag "Options"
 165                         :inline t
 166                         (string :format "%v")))
 167   :group 'archive-arc)
 168
 169 (defcustom archive-arc-write-file-member
 170   '("arc" "u")
 171   "*Program and its options to run in order to update an arc file member.
 172 Archive and member name will be added."
 173   :type '(list (string :tag "Program")
 174                 (repeat :tag "Options"
 175                         :inline t
 176                         (string :format "%v")))
 177   :group 'archive-arc)
 178 ;; ------------------------------
 179 ;; Lzh archive configuration
 180
 181 (defcustom archive-lzh-extract
 182   '("lha" "pq")
 183   "*Program and its options to run in order to extract an lzh file member.
 184 Extraction should happen to standard output.  Archive and member name will
 185 be added."
 186   :type '(list (string :tag "Program")
 187                 (repeat :tag "Options"
 188                         :inline t
 189                         (string :format "%v")))
 190   :group 'archive-lzh)
 191
 192 (defcustom archive-lzh-expunge
 193   '("lha" "d")
 194   "*Program and its options to run in order to delete lzh file members.
 195 Archive and member names will be added."
 196   :type '(list (string :tag "Program")
 197                 (repeat :tag "Options"
 198                         :inline t
 199                         (string :format "%v")))
 200   :group 'archive-lzh)
 201
 202 (defcustom archive-lzh-write-file-member
 203   '("lha" "a")
 204   "*Program and its options to run in order to update an lzh file member.
 205 Archive and member name will be added."
 206   :type '(list (string :tag "Program")
 207                 (repeat :tag "Options"
 208                         :inline t
 209                         (string :format "%v")))
 210   :group 'archive-lzh)
 211 ;; ------------------------------
 212 ;; Zip archive configuration
 213
 214 (defcustom archive-zip-use-pkzip (memq system-type '(ms-dos windows-nt))
 215   "*If non-nil then pkzip option are used instead of zip options.
 216 Only set to true for msdog systems!"
 217   :type 'boolean
 218   :group 'archive-zip)
 219
 220 (defcustom archive-zip-extract
 221   (if archive-zip-use-pkzip '("pkunzip" "-e" "-o-") '("unzip" "-qq" "-c"))
 222   "*Program and its options to run in order to extract a zip file member.
 223 Extraction should happen to standard output.  Archive and member name will
 224 be added.  If `archive-zip-use-pkzip' is non-nil then this program is
 225 expected to extract to a file junking the directory part of the name."
 226   :type '(list (string :tag "Program")
 227                 (repeat :tag "Options"
 228                         :inline t
 229                         (string :format "%v")))
 230   :group 'archive-zip)
 231
 232 ;; For several reasons the latter behaviour is not desirable in general.
 233 ;; (1) It uses more disk space.  (2) Error checking is worse or non-
 234 ;; existent.  (3) It tends to do funny things with other systems' file
 235 ;; names.
 236
 237 (defcustom archive-zip-expunge
 238   (if archive-zip-use-pkzip '("pkzip" "-d") '("zip" "-d" "-q"))
 239   "*Program and its options to run in order to delete zip file members.
 240 Archive and member names will be added."
 241   :type '(list (string :tag "Program")
 242                 (repeat :tag "Options"
 243                         :inline t
 244                         (string :format "%v")))
 245   :group 'archive-zip)
 246
 247 (defcustom archive-zip-update
 248   (if archive-zip-use-pkzip '("pkzip" "-u" "-P") '("zip" "-q"))
 249   "*Program and its options to run in order to update a zip file member.
 250 Options should ensure that specified directory will be put into the zip
 251 file.  Archive and member name will be added."
 252   :type '(list (string :tag "Program")
 253                 (repeat :tag "Options"
 254                         :inline t
 255                         (string :format "%v")))
 256   :group 'archive-zip)
 257
 258 (defcustom archive-zip-update-case
 259   (if archive-zip-use-pkzip archive-zip-update '("zip" "-q" "-k"))
 260   "*Program and its options to run in order to update a case fiddled zip member.
 261 Options should ensure that specified directory will be put into the zip file.
 262 Archive and member name will be added."
 263   :type '(list (string :tag "Program")
 264                 (repeat :tag "Options"
 265                         :inline t
 266                         (string :format "%v")))
 267   :group 'archive-zip)
 268
 269 (defcustom archive-zip-case-fiddle t
 270   "*If non-nil then zip file members may be down-cased.
 271 This case fiddling will only happen for members created by a system
 272 that uses caseless file names."
 273   :type 'boolean
 274   :group 'archive-zip)
 275 ;; ------------------------------
 276 ;; Zoo archive configuration
 277
 278 (defcustom archive-zoo-extract
 279   '("zoo" "xpq")
 280   "*Program and its options to run in order to extract a zoo file member.
 281 Extraction should happen to standard output.  Archive and member name will
 282 be added."
 283   :type '(list (string :tag "Program")
 284                 (repeat :tag "Options"
 285                         :inline t
 286                         (string :format "%v")))
 287   :group 'archive-zoo)
 288
 289 (defcustom archive-zoo-expunge
 290   '("zoo" "DqPP")
 291   "*Program and its options to run in order to delete zoo file members.
 292 Archive and member names will be added."
 293   :type '(list (string :tag "Program")
 294                 (repeat :tag "Options"
 295                         :inline t
 296                         (string :format "%v")))
 297   :group 'archive-zoo)
 298
 299 (defcustom archive-zoo-write-file-member
 300   '("zoo" "a")
 301   "*Program and its options to run in order to update a zoo file member.
 302 Archive and member name will be added."
 303   :type '(list (string :tag "Program")
 304                 (repeat :tag "Options"
 305                         :inline t
 306                         (string :format "%v")))
 307   :group 'archive-zoo)
 308 ;; -------------------------------------------------------------------------
 309 ;; Section: Variables
 310
 311 (defvar archive-subtype nil "*Symbol describing archive type.")
 312 (defvar archive-file-list-start nil "*Position of first contents line.")
 313 (defvar archive-file-list-end nil "*Position just after last contents line.")
 314 (defvar archive-proper-file-start nil "*Position of real archive's start.")
 315 (defvar archive-read-only nil "*Non-nil if the archive is read-only on disk.")
 316 (defvar archive-local-name nil "*Name of local copy of remote archive.")
 317 (defvar archive-mode-map nil "*Local keymap for archive mode listings.")
 318 (defvar archive-file-name-indent nil "*Column where file names start.")
 319
 320 (defvar archive-remote nil "*Non-nil if the archive is outside file system.")
 321 (make-variable-buffer-local 'archive-remote)
 322 (put 'archive-remote 'permanent-local t)
 323
 324 (defvar archive-member-coding-system nil "Coding-system of archive member.")
 325 (make-variable-buffer-local 'archive-member-coding-system)
 326
 327 (defvar archive-alternate-display nil
 328   "*Non-nil when alternate information is shown.")
 329 (make-variable-buffer-local 'archive-alternate-display)
 330 (put 'archive-alternate-display 'permanent-local t)
 331
 332 (defvar archive-superior-buffer nil "*In archive members, points to archive.")
 333 (put 'archive-superior-buffer 'permanent-local t)
 334
 335 (defvar archive-subfile-mode nil "*Non-nil in archive member buffers.")
 336 (make-variable-buffer-local 'archive-subfile-mode)
 337 (put 'archive-subfile-mode 'permanent-local t)
 338
 339 (defvar archive-files nil
 340   "Vector of file descriptors.
 341 Each descriptor is a vector of the form
 342  [EXT-FILE-NAME INT-FILE-NAME CASE-FIDDLED MODE ...]")
 343 (make-variable-buffer-local 'archive-files)
 344
 345 (defvar archive-lemacs
 346   (string-match "\\(Lucid\\|Xemacs\\)" emacs-version)
 347   "*Non-nil when running under under Lucid Emacs or Xemacs.")
 348 ;; -------------------------------------------------------------------------
 349 ;; Section: Support functions.
 350
 351 (defsubst archive-name (suffix)
 352   (intern (concat "archive-" (symbol-name archive-subtype) "-" suffix)))
 353
 354 (defun archive-l-e (str &optional len)
 355   "Convert little endian string/vector to integer.
 356 Alternatively, first argument may be a buffer position in the current buffer
 357 in which case a second argument, length, should be supplied."
 358   (if (stringp str)
 359       (setq len (length str))
 360     (setq str (buffer-substring str (+ str len))))
 361   (let ((result 0)
 362         (i 0))
 363     (while (< i len)
 364       (setq i (1+ i)
 365             result (+ (ash result 8) (aref str (- len i)))))
 366     result))
 367
 368 (defun archive-int-to-mode (mode)
 369   "Turn an integer like 0700 (i.e., 448) into a mode string like -rwx------."
 370   ;; FIXME: merge with tar-grind-file-mode.
 371   (string
 372     (if (zerop (logand  8192 mode))
 373         (if (zerop (logand 16384 mode)) ?- ?d)
 374       ?c) ; completeness
 375     (if (zerop (logand   256 mode)) ?- ?r)
 376     (if (zerop (logand   128 mode)) ?- ?w)
 377     (if (zerop (logand    64 mode))
 378         (if (zerop (logand  1024 mode)) ?- ?S)
 379       (if (zerop (logand  1024 mode)) ?x ?s))
 380     (if (zerop (logand    32 mode)) ?- ?r)
 381     (if (zerop (logand    16 mode)) ?- ?w)
 382     (if (zerop (logand     8 mode))
 383         (if (zerop (logand  2048 mode)) ?- ?S)
 384       (if (zerop (logand  2048 mode)) ?x ?s))
 385     (if (zerop (logand     4 mode)) ?- ?r)
 386     (if (zerop (logand     2 mode)) ?- ?w)
 387     (if (zerop (logand     1 mode)) ?- ?x)))
 388
 389 (defun archive-calc-mode (oldmode newmode &optional error)
 390   "From the integer OLDMODE and the string NEWMODE calculate a new file mode.
 391 NEWMODE may be an octal number including a leading zero in which case it
 392 will become the new mode.\n
 393 NEWMODE may also be a relative specification like \"og-rwx\" in which case
 394 OLDMODE will be modified accordingly just like chmod(2) would have done.\n
 395 If optional third argument ERROR is non-nil an error will be signaled if
 396 the mode is invalid.  If ERROR is nil then nil will be returned."
 397   (cond ((string-match "^0[0-7]*$" newmode)
 398          (let ((result 0)
 399                (len (length newmode))
 400                (i 1))
 401            (while (< i len)
 402              (setq result (+ (lsh result 3) (aref newmode i) (- ?0))
 403                    i (1+ i)))
 404            (logior (logand oldmode 65024) result)))
 405         ((string-match "^\\([agou]+\\)\\([---+=]\\)\\([rwxst]+\\)$" newmode)
 406          (let ((who 0)
 407                (result oldmode)
 408                (op (aref newmode (match-beginning 2)))
 409                (bits 0)
 410                (i (match-beginning 3)))
 411            (while (< i (match-end 3))
 412              (let ((rwx (aref newmode i)))
 413                (setq bits (logior bits (cond ((= rwx ?r)  292)
 414                                              ((= rwx ?w)  146)
 415                                              ((= rwx ?x)   73)
 416                                              ((= rwx ?s) 3072)
 417                                              ((= rwx ?t)  512)))
 418                      i (1+ i))))
 419            (while (< who (match-end 1))
 420              (let* ((whoc (aref newmode who))
 421                     (whomask (cond ((= whoc ?a) 4095)
 422                                    ((= whoc ?u) 1472)
 423                                    ((= whoc ?g) 2104)
 424                                    ((= whoc ?o)    7))))
 425                (if (= op ?=)
 426                    (setq result (logand result (lognot whomask))))
 427                (if (= op ?-)
 428                    (setq result (logand result (lognot (logand whomask bits))))
 429                  (setq result (logior result (logand whomask bits)))))
 430              (setq who (1+ who)))
 431            result))
 432         (t
 433          (if error
 434              (error "Invalid mode specification: %s" newmode)))))
 435
 436 (defun archive-dosdate (date)
 437   "Stringify dos packed DATE record."
 438   (let ((year (+ 1980 (logand (ash date -9) 127)))
 439         (month (logand (ash date -5) 15))
 440         (day (logand date 31)))
 441     (if (or (> month 12) (< month 1))
 442         ""
 443       (format "%2d-%s-%d"
 444               day
 445               (aref ["Jan" "Feb" "Mar" "Apr" "May" "Jun"
 446                      "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"] (1- month))
 447               year))))
 448
 449 (defun archive-dostime (time)
 450   "Stringify dos packed TIME record."
 451   (let ((hour (logand (ash time -11) 31))
 452         (minute (logand (ash time -5) 63))
 453         (second (* 2 (logand time 31)))) ; 2 seconds resolution
 454     (format "%02d:%02d:%02d" hour minute second)))
 455
 456 ;;(defun archive-unixdate (low high)
 457 ;;  "Stringify unix (LOW HIGH) date."
 458 ;;  (let ((str (current-time-string (cons high low))))
 459 ;;    (format "%s-%s-%s"
 460 ;;          (substring str 8 9)
 461 ;;          (substring str 4 7)
 462 ;;          (substring str 20 24))))
 463
 464 ;;(defun archive-unixtime (low high)
 465 ;;  "Stringify unix (LOW HIGH) time."
 466 ;;  (let ((str (current-time-string (cons high low))))
 467 ;;    (substring str 11 19)))
 468
 469 (defun archive-get-lineno ()
 470   (if (>= (point) archive-file-list-start)
 471       (count-lines archive-file-list-start
 472                    (save-excursion (beginning-of-line) (point)))
 473     0))
 474
 475 (defun archive-get-descr (&optional noerror)
 476   "Return the descriptor vector for file at point.
 477 Does not signal an error if optional second argument NOERROR is non-nil."
 478   (let ((no (archive-get-lineno)))
 479     (if (and (>= (point) archive-file-list-start)
 480              (< no (length archive-files)))
 481         (let ((item (aref archive-files no)))
 482           (if (vectorp item)
 483               item
 484             (if (not noerror)
 485                 (error "Entry is not a regular member of the archive"))))
 486       (if (not noerror)
 487           (error "Line does not describe a member of the archive")))))
 488 ;; -------------------------------------------------------------------------
 489 ;; Section: the mode definition
 490
 491 ;;;###autoload
 492 (defun archive-mode (&optional force)
 493   "Major mode for viewing an archive file in a dired-like way.
 494 You can move around using the usual cursor motion commands.
 495 Letters no longer insert themselves.
 496 Type `e' to pull a file out of the archive and into its own buffer;
 497 or click mouse-2 on the file's line in the archive mode buffer.
 498
 499 If you edit a sub-file of this archive (as with the `e' command) and
 500 save it, the contents of that buffer will be saved back into the
 501 archive.
 502
 503 \\{archive-mode-map}"
 504   ;; This is not interactive because you shouldn't be turning this
 505   ;; mode on and off.  You can corrupt things that way.
 506   (if (zerop (buffer-size))
 507       ;; At present we cannot create archives from scratch
 508       (funcall default-major-mode)
 509     (if (and (not force) archive-files) nil
 510       (let* ((type (archive-find-type))
 511              (typename (capitalize (symbol-name type))))
 512         (kill-all-local-variables)
 513         (make-local-variable 'archive-subtype)
 514         (setq archive-subtype type)
 515
 516         ;; Buffer contains treated image of file before the file contents
 517         (make-local-variable 'revert-buffer-function)
 518         (setq revert-buffer-function 'archive-mode-revert)
 519         (auto-save-mode 0)
 520
 521         ;; Remote archives are not written by a hook.
 522         (if archive-remote nil
 523           (make-local-variable 'write-contents-hooks)
 524           (add-hook 'write-contents-hooks 'archive-write-file))
 525
 526         (make-local-variable 'require-final-newline)
 527         (setq require-final-newline nil)
 528         (make-local-variable 'local-enable-local-variables)
 529         (setq local-enable-local-variables nil)
 530
 531         ;; Prevent loss of data when saving the file.
 532         (make-local-variable 'file-precious-flag)
 533         (setq file-precious-flag t)
 534
 535         (make-local-variable 'archive-read-only)
 536         ;; Archives which are inside other archives and whose
 537         ;; names are invalid for this OS, can't be written.
 538         (setq archive-read-only
 539               (or (not (file-writable-p (buffer-file-name)))
 540                   (and archive-subfile-mode
 541                        (string-match file-name-invalid-regexp
 542                                      (aref archive-subfile-mode 0)))))
 543
 544         ;; Should we use a local copy when accessing from outside Emacs?
 545         (make-local-variable 'archive-local-name)
 546
 547         ;; An archive can contain another archive whose name is invalid
 548         ;; on local filesystem.  Treat such archives as remote.
 549         (or archive-remote
 550             (setq archive-remote
 551                   (or (string-match archive-remote-regexp (buffer-file-name))
 552                       (string-match file-name-invalid-regexp
 553                                     (buffer-file-name)))))
 554
 555         (setq major-mode 'archive-mode)
 556         (setq mode-name (concat typename "-Archive"))
 557         ;; Run archive-foo-mode-hook and archive-mode-hook
 558         (run-hooks (archive-name "mode-hook") 'archive-mode-hook)
 559         (use-local-map archive-mode-map))
 560
 561       (make-local-variable 'archive-proper-file-start)
 562       (make-local-variable 'archive-file-list-start)
 563       (make-local-variable 'archive-file-list-end)
 564       (make-local-variable 'archive-file-name-indent)
 565       (archive-summarize nil)
 566       (setq buffer-read-only t))))
 567
 568 ;; Archive mode is suitable only for specially formatted data.
 569 (put 'archive-mode 'mode-class 'special)
 570 ;; -------------------------------------------------------------------------
 571 ;; Section: Key maps
 572
 573 (if archive-mode-map nil
 574   (setq archive-mode-map (make-keymap))
 575   (suppress-keymap archive-mode-map)
 576   (define-key archive-mode-map " " 'archive-next-line)
 577   (define-key archive-mode-map "a" 'archive-alternate-display)
 578   ;;(define-key archive-mode-map "c" 'archive-copy)
 579   (define-key archive-mode-map "d" 'archive-flag-deleted)
 580   (define-key archive-mode-map "\C-d" 'archive-flag-deleted)
 581   (define-key archive-mode-map "e" 'archive-extract)
 582   (define-key archive-mode-map "f" 'archive-extract)
 583   (define-key archive-mode-map "\C-m" 'archive-extract)
 584   (define-key archive-mode-map "g" 'revert-buffer)
 585   (define-key archive-mode-map "h" 'describe-mode)
 586   (define-key archive-mode-map "m" 'archive-mark)
 587   (define-key archive-mode-map "n" 'archive-next-line)
 588   (define-key archive-mode-map "\C-n" 'archive-next-line)
 589   (define-key archive-mode-map [down] 'archive-next-line)
 590   (define-key archive-mode-map "o" 'archive-extract-other-window)
 591   (define-key archive-mode-map "p" 'archive-previous-line)
 592   (define-key archive-mode-map "q" 'quit-window)
 593   (define-key archive-mode-map "\C-p" 'archive-previous-line)
 594   (define-key archive-mode-map [up] 'archive-previous-line)
 595   (define-key archive-mode-map "r" 'archive-rename-entry)
 596   (define-key archive-mode-map "u" 'archive-unflag)
 597   (define-key archive-mode-map "\M-\C-?" 'archive-unmark-all-files)
 598   (define-key archive-mode-map "v" 'archive-view)
 599   (define-key archive-mode-map "x" 'archive-expunge)
 600   (define-key archive-mode-map "\177" 'archive-unflag-backwards)
 601   (define-key archive-mode-map "E" 'archive-extract-other-window)
 602   (define-key archive-mode-map "M" 'archive-chmod-entry)
 603   (define-key archive-mode-map "G" 'archive-chgrp-entry)
 604   (define-key archive-mode-map "O" 'archive-chown-entry)
 605
 606   (if archive-lemacs
 607       (progn
 608         ;; Not a nice "solution" but it'll have to do
 609         (define-key archive-mode-map "\C-xu" 'archive-undo)
 610         (define-key archive-mode-map "\C-_" 'archive-undo))
 611     (substitute-key-definition 'undo 'archive-undo
 612                                archive-mode-map global-map))
 613
 614   (define-key archive-mode-map
 615     (if archive-lemacs 'button2 [mouse-2]) 'archive-mouse-extract)
 616
 617   (if archive-lemacs
 618       ()                                ; out of luck
 619
 620     (define-key archive-mode-map [menu-bar immediate]
 621       (cons "Immediate" (make-sparse-keymap "Immediate")))
 622     (define-key archive-mode-map [menu-bar immediate alternate]
 623       '(menu-item "Alternate Display" archive-alternate-display
 624                   :enable (boundp (archive-name "alternate-display"))
 625                   :help "Toggle alternate file info display"))
 626     (define-key archive-mode-map [menu-bar immediate view]
 627       '(menu-item "View This File" archive-view
 628                   :help "Display file at cursor in View Mode"))
 629     (define-key archive-mode-map [menu-bar immediate display]
 630       '(menu-item "Display in Other Window" archive-display-other-window
 631                   :help "Display file at cursor in another window"))
 632     (define-key archive-mode-map [menu-bar immediate find-file-other-window]
 633       '(menu-item "Find in Other Window" archive-extract-other-window
 634                   :help "Edit file at cursor in another window"))
 635     (define-key archive-mode-map [menu-bar immediate find-file]
 636       '(menu-item "Find This File" archive-extract
 637                   :help "Extract file at cursor and edit it"))
 638
 639     (define-key archive-mode-map [menu-bar mark]
 640       (cons "Mark" (make-sparse-keymap "Mark")))
 641     (define-key archive-mode-map [menu-bar mark unmark-all]
 642       '(menu-item "Unmark All" archive-unmark-all-files
 643                   :help "Unmark all marked files"))
 644     (define-key archive-mode-map [menu-bar mark deletion]
 645       '(menu-item "Flag" archive-flag-deleted
 646                   :help "Flag file at cursor for deletion"))
 647     (define-key archive-mode-map [menu-bar mark unmark]
 648       '(menu-item "Unflag" archive-unflag
 649                   :help "Unmark file at cursor"))
 650     (define-key archive-mode-map [menu-bar mark mark]
 651       '(menu-item "Mark" archive-mark
 652                   :help "Mark file at cursor"))
 653
 654     (define-key archive-mode-map [menu-bar operate]
 655       (cons "Operate" (make-sparse-keymap "Operate")))
 656     (define-key archive-mode-map [menu-bar operate chown]
 657       '(menu-item "Change Owner..." archive-chown-entry
 658                   :enable (fboundp (archive-name "chown-entry"))
 659                   :help "Change owner of marked files"))
 660     (define-key archive-mode-map [menu-bar operate chgrp]
 661       '(menu-item "Change Group..." archive-chgrp-entry
 662                   :enable (fboundp (archive-name "chgrp-entry"))
 663                   :help "Change group ownership of marked files"))
 664     (define-key archive-mode-map [menu-bar operate chmod]
 665       '(menu-item "Change Mode..." archive-chmod-entry
 666                   :enable (fboundp (archive-name "chmod-entry"))
 667                   :help "Change mode (permissions) of marked files"))
 668     (define-key archive-mode-map [menu-bar operate rename]
 669       '(menu-item "Rename to..." archive-rename-entry
 670                   :enable (fboundp (archive-name "rename-entry"))
 671                   :help "Rename marked files"))
 672     ;;(define-key archive-mode-map [menu-bar operate copy]
 673     ;;  '(menu-item "Copy to..." archive-copy))
 674     (define-key archive-mode-map [menu-bar operate expunge]
 675       '(menu-item "Expunge Marked Files" archive-expunge
 676                   :help "Delete all flagged files from archive"))
 677   ))
 678
 679 (let* ((item1 '(archive-subfile-mode " Archive"))
 680        (items (list item1)))
 681   (or (member item1 minor-mode-alist)
 682       (setq minor-mode-alist (append items minor-mode-alist))))
 683 ;; -------------------------------------------------------------------------
 684 (defun archive-find-type ()
 685   (widen)
 686   (goto-char (point-min))
 687   ;; The funny [] here make it unlikely that the .elc file will be treated
 688   ;; as an archive by other software.
 689   (let (case-fold-search)
 690     (cond ((looking-at "[P]K\003\004") 'zip)
 691           ((looking-at "..-l[hz][0-9ds]-") 'lzh)
 692           ((looking-at "....................[\334]\247\304\375") 'zoo)
 693           ((and (looking-at "\C-z")     ; signature too simple, IMHO
 694                 (string-match "\\.[aA][rR][cC]$"
 695                               (or buffer-file-name (buffer-name))))
 696            'arc)
 697           (t (error "Buffer format not recognized")))))
 698 ;; -------------------------------------------------------------------------
 699 (defun archive-summarize (&optional shut-up)
 700   "Parse the contents of the archive file in the current buffer.
 701 Place a dired-like listing on the front;
 702 then narrow to it, so that only that listing
 703 is visible (and the real data of the buffer is hidden).
 704 Optional argument SHUT-UP, if non-nil, means don't print messages
 705 when parsing the archive."
 706   (widen)
 707   (set-buffer-multibyte nil)
 708   (let (buffer-read-only)
 709     (or shut-up
 710         (message "Parsing archive file..."))
 711     (buffer-disable-undo (current-buffer))
 712     (setq archive-files (funcall (archive-name "summarize")))
 713     (or shut-up
 714         (message "Parsing archive file...done."))
 715     (setq archive-proper-file-start (point-marker))
 716     (narrow-to-region (point-min) (point))
 717     (set-buffer-modified-p nil)
 718     (buffer-enable-undo))
 719   (goto-char archive-file-list-start)
 720   (archive-next-line 0))
 721
 722 (defun archive-resummarize ()
 723   "Recreate the contents listing of an archive."
 724   (let ((modified (buffer-modified-p))
 725         (no (archive-get-lineno))
 726         buffer-read-only)
 727     (widen)
 728     (delete-region (point-min) archive-proper-file-start)
 729     (archive-summarize t)
 730     (set-buffer-modified-p modified)
 731     (goto-char archive-file-list-start)
 732     (archive-next-line no)))
 733
 734 (defun archive-summarize-files (files)
 735   "Insert a description of a list of files annotated with proper mouse face."
 736   (setq archive-file-list-start (point-marker))
 737   (setq archive-file-name-indent (if files (aref (car files) 1) 0))
 738   ;; We don't want to do an insert for each element since that takes too
 739   ;; long when the archive -- which has to be moved in memory -- is large.
 740   (insert
 741    (apply
 742     (function concat)
 743     (mapcar
 744      (function
 745       (lambda (fil)
 746         ;; Using `concat' here copies the text also, so we can add
 747         ;; properties without problems.
 748         (let ((text (concat (aref fil 0) "\n")))
 749           (if archive-lemacs
 750               ()                        ; out of luck
 751             (add-text-properties
 752              (aref fil 1) (aref fil 2)
 753              '(mouse-face highlight
 754                help-echo "mouse-2: extract this file into a buffer")
 755              text))
 756           text)))
 757      files)))
 758   (setq archive-file-list-end (point-marker)))
 759
 760 (defun archive-alternate-display ()
 761   "Toggle alternative display.
 762 To avoid very long lines some archive mode don't show all information.
 763 This function changes the set of information shown for each files."
 764   (interactive)
 765   (setq archive-alternate-display (not archive-alternate-display))
 766   (archive-resummarize))
 767 ;; -------------------------------------------------------------------------
 768 ;; Section: Local archive copy handling
 769
 770 (defun archive-unique-fname (fname dir)
 771   "Make sure a file FNAME can be created uniquely in directory DIR.
 772
 773 If FNAME can be uniquely created in DIR, it is returned unaltered.
 774 If FNAME is something our underlying filesystem can't grok, or if another
 775 file by that name already exists in DIR, a unique new name is generated
 776 using `make-temp-file', and the generated name is returned."
 777   (let ((fullname (expand-file-name fname dir))
 778         (alien (string-match file-name-invalid-regexp fname)))
 779     (if (or alien (file-exists-p fullname))
 780         (make-temp-file
 781          (expand-file-name
 782           (if (and (fboundp 'msdos-long-file-names)
 783                    (not (msdos-long-file-names)))
 784               "am"
 785             "arc-mode.")
 786           dir))
 787       fullname)))
 788
 789 (defun archive-maybe-copy (archive)
 790   (let ((coding-system-for-write 'no-conversion))
 791     (if archive-remote
 792         (let ((start (point-max))
 793               ;; Sometimes ARCHIVE is invalid while its actual name, as
 794               ;; recorded in its parent archive, is not.  For example, an
 795               ;; archive bar.zip inside another archive foo.zip gets a name
 796               ;; "foo.zip:bar.zip", which is invalid on DOS/Windows.
 797               ;; So use the actual name if available.
 798               (archive-name
 799                (or (and archive-subfile-mode (aref archive-subfile-mode 0))
 800                    archive)))
 801           (make-directory archive-tmpdir t)
 802           (setq archive-local-name
 803                 (archive-unique-fname archive-name archive-tmpdir))
 804           (save-restriction
 805             (widen)
 806             (write-region start (point-max) archive-local-name nil 'nomessage))
 807           archive-local-name)
 808       (if (buffer-modified-p) (save-buffer))
 809       archive)))
 810
 811 (defun archive-maybe-update (unchanged)
 812   (if archive-remote
 813       (let ((name archive-local-name)
 814             (modified (buffer-modified-p))
 815             (coding-system-for-read 'no-conversion)
 816             (lno (archive-get-lineno))
 817             buffer-read-only)
 818         (if unchanged nil
 819           (setq archive-files nil)
 820           (erase-buffer)
 821           (insert-file-contents name)
 822           (archive-mode t)
 823           (goto-char archive-file-list-start)
 824           (archive-next-line lno))
 825         (archive-delete-local name)
 826         (if (not unchanged)
 827             (message
 828              "Buffer `%s' must be saved for changes to take effect"
 829              (buffer-name (current-buffer))))
 830         (set-buffer-modified-p (or modified (not unchanged))))))
 831
 832 (defun archive-delete-local (name)
 833   "Delete file NAME and its parents up to and including `archive-tmpdir'."
 834   (let ((again t)
 835         (top (directory-file-name (file-name-as-directory archive-tmpdir))))
 836     (condition-case nil
 837         (delete-file name)
 838       (error nil))
 839     (while again
 840       (setq name (directory-file-name (file-name-directory name)))
 841       (condition-case nil
 842           (delete-directory name)
 843         (error nil))
 844       (if (string= name top) (setq again nil)))))
 845 ;; -------------------------------------------------------------------------
 846 ;; Section: Member extraction
 847
 848 (defun archive-file-name-handler (op &rest args)
 849   (or (eq op 'file-exists-p)
 850       (let ((file-name-handler-alist nil))
 851         (apply op args))))
 852
 853 (defun archive-set-buffer-as-visiting-file (filename)
 854   "Set the current buffer as if it were visiting FILENAME."
 855   (save-excursion
 856     (goto-char (point-min))
 857     (let ((coding
 858            (or coding-system-for-read
 859                (and set-auto-coding-function
 860                     (save-excursion
 861                       (funcall set-auto-coding-function
 862                                filename (- (point-max) (point-min)))))
 863                ;; dos-w32.el defines find-operation-coding-system for
 864                ;; DOS/Windows systems which preserves the coding-system
 865                ;; of existing files.  We want it to act here as if the
 866                ;; extracted file existed.
 867                (let ((file-name-handler-alist
 868                       '(("" . archive-file-name-handler))))
 869                  (car (find-operation-coding-system 'insert-file-contents
 870                                                     filename t))))))
 871       (if (and (not coding-system-for-read)
 872                (not enable-multibyte-characters))
 873           (setq coding
 874                 (coding-system-change-text-conversion coding 'raw-text)))
 875       (if (and coding
 876                (not (eq coding 'no-conversion)))
 877           (decode-coding-region (point-min) (point-max) coding)
 878         (setq last-coding-system-used coding))
 879       (set-buffer-modified-p nil)
 880       (kill-local-variable 'buffer-file-coding-system)
 881       (after-insert-file-set-buffer-file-coding-system (- (point-max)
 882                                                           (point-min))))))
 883
 884 (defun archive-mouse-extract (event)
 885   "Extract a file whose name you click on."
 886   (interactive "e")
 887   (mouse-set-point event)
 888   (switch-to-buffer
 889    (save-excursion
 890      (archive-extract)
 891      (current-buffer))))
 892
 893 (defun archive-extract (&optional other-window-p)
 894   "In archive mode, extract this entry of the archive into its own buffer."
 895   (interactive)
 896   (let* ((view-p (eq other-window-p 'view))
 897          (descr (archive-get-descr))
 898          (ename (aref descr 0))
 899          (iname (aref descr 1))
 900          (archive-buffer (current-buffer))
 901          (arcdir default-directory)
 902          (archive (buffer-file-name))
 903          (arcname (file-name-nondirectory archive))
 904          (bufname (concat (file-name-nondirectory iname) " (" arcname ")"))
 905          (extractor (archive-name "extract"))
 906          ;; Members with file names which aren't valid for the
 907          ;; underlying filesystem, are treated as read-only.
 908          (read-only-p (or archive-read-only
 909                           view-p
 910                           (string-match file-name-invalid-regexp ename)))
 911          (buffer (get-buffer bufname))
 912          (just-created nil))
 913       (if buffer
 914           nil
 915         (setq archive (archive-maybe-copy archive))
 916         (setq buffer (get-buffer-create bufname))
 917         (setq just-created t)
 918         (save-excursion
 919           (set-buffer buffer)
 920           (setq buffer-file-name
 921                 (expand-file-name (concat arcname ":" iname)))
 922           (setq buffer-file-truename
 923                 (abbreviate-file-name buffer-file-name))
 924           ;; Set the default-directory to the dir of the superior buffer.
 925           (setq default-directory arcdir)
 926           (make-local-variable 'archive-superior-buffer)
 927           (setq archive-superior-buffer archive-buffer)
 928           (make-local-variable 'local-write-file-hooks)
 929           (add-hook 'local-write-file-hooks 'archive-write-file-member)
 930           (setq archive-subfile-mode descr)
 931           (if (and
 932                (null
 933                 (let (;; We may have to encode file name arguement for
 934                       ;; external programs.
 935                       (coding-system-for-write
 936                        (and enable-multibyte-characters
 937                             file-name-coding-system))
 938                       ;; We read an archive member by no-conversion at
 939                       ;; first, then decode appropriately by calling
 940                       ;; archive-set-buffer-as-visiting-file later.
 941                       (coding-system-for-read 'no-conversion))
 942                   (condition-case err
 943                       (if (fboundp extractor)
 944                           (funcall extractor archive ename)
 945                         (archive-*-extract archive ename
 946                                            (symbol-value extractor)))
 947                     (error
 948                      (ding (message "%s" (error-message-string err)))
 949                      nil))))
 950                just-created)
 951               (progn
 952                 (set-buffer-modified-p nil)
 953                 (kill-buffer buffer))
 954             (archive-set-buffer-as-visiting-file ename)
 955             (goto-char (point-min))
 956             (rename-buffer bufname)
 957             (setq buffer-read-only read-only-p)
 958             (setq buffer-undo-list nil)
 959             (set-buffer-modified-p nil)
 960             (setq buffer-saved-size (buffer-size))
 961             (normal-mode)
 962             ;; Just in case an archive occurs inside another archive.
 963             (if (eq major-mode 'archive-mode)
 964                 (progn
 965                   (setq archive-remote t)
 966                   (if read-only-p (setq archive-read-only t))
 967                   ;; We will write out the archive ourselves if it is
 968                   ;; part of another archive.
 969                   (remove-hook 'write-contents-hooks 'archive-write-file t)))
 970             (run-hooks 'archive-extract-hooks)
 971             (if archive-read-only
 972                 (message "Note: altering this archive is not implemented."))))
 973         (archive-maybe-update t))
 974       (or (not (buffer-name buffer))
 975           (progn
 976             (if view-p
 977                 (view-buffer buffer (and just-created 'kill-buffer))
 978               (if (eq other-window-p 'display)
 979                   (display-buffer buffer)
 980                 (if other-window-p
 981                     (switch-to-buffer-other-window buffer)
 982                   (switch-to-buffer buffer))))))))
 983
 984 (defun archive-*-extract (archive name command)
 985   (let* ((default-directory (file-name-as-directory archive-tmpdir))
 986          (tmpfile (expand-file-name (file-name-nondirectory name)
 987                                     default-directory))
 988          exit-status success)
 989     (make-directory (directory-file-name default-directory) t)
 990     (setq exit-status
 991           (apply 'call-process
 992                  (car command)
 993                  nil
 994                  nil
 995                  nil
 996                  (append (cdr command) (list archive name))))
 997     (cond ((and (numberp exit-status) (= exit-status 0))
 998            (if (not (file-exists-p tmpfile))
 999                (ding (message "`%s': no such file or directory" tmpfile))
1000              (insert-file-contents tmpfile)
1001              (setq success t)))
1002           ((numberp exit-status)
1003            (ding
1004             (message "`%s' exited with status %d" (car command) exit-status)))
1005           ((stringp exit-status)
1006            (ding (message "`%s' aborted: %s" (car command) exit-status)))
1007           (t
1008            (ding (message "`%s' failed" (car command)))))
1009     (archive-delete-local tmpfile)
1010     success))
1011
1012 (defun archive-extract-by-stdout (archive name command)
1013   (apply 'call-process
1014          (car command)
1015          nil
1016          t
1017          nil
1018          (append (cdr command) (list archive name))))
1019
1020 (defun archive-extract-other-window ()
1021   "In archive mode, find this member in another window."
1022   (interactive)
1023   (archive-extract t))
1024
1025 (defun archive-display-other-window ()
1026   "In archive mode, display this member in another window."
1027   (interactive)
1028   (archive-extract 'display))
1029
1030 (defun archive-view ()
1031   "In archive mode, view the member on this line."
1032   (interactive)
1033   (archive-extract 'view))
1034
1035 (defun archive-add-new-member (arcbuf name)
1036   "Add current buffer to the archive in ARCBUF naming it NAME."
1037   (interactive
1038    (list (get-buffer
1039           (read-buffer "Buffer containing archive: "
1040                        ;; Find first archive buffer and suggest that
1041                        (let ((bufs (buffer-list)))
1042                          (while (and bufs (not (eq (save-excursion
1043                                                      (set-buffer (car bufs))
1044                                                      major-mode)
1045                                                    'archive-mode)))
1046                            (setq bufs (cdr bufs)))
1047                          (if bufs
1048                              (car bufs)
1049                            (error "There are no archive buffers")))
1050                        t))
1051          (read-string "File name in archive: "
1052                       (if buffer-file-name
1053                           (file-name-nondirectory buffer-file-name)
1054                         ""))))
1055   (save-excursion
1056     (set-buffer arcbuf)
1057     (or (eq major-mode 'archive-mode)
1058         (error "Buffer is not an archive buffer"))
1059     (if archive-read-only
1060         (error "Archive is read-only")))
1061   (if (eq arcbuf (current-buffer))
1062       (error "An archive buffer cannot be added to itself"))
1063   (if (string= name "")
1064       (error "Archive members may not be given empty names"))
1065   (let ((func (save-excursion (set-buffer arcbuf)
1066                               (archive-name "add-new-member")))
1067         (membuf (current-buffer)))
1068     (if (fboundp func)
1069         (save-excursion
1070           (set-buffer arcbuf)
1071           (funcall func buffer-file-name membuf name))
1072       (error "Adding a new member is not supported for this archive type"))))
1073 ;; -------------------------------------------------------------------------
1074 ;; Section: IO stuff
1075
1076 (defun archive-write-file-member ()
1077   (save-excursion
1078     (save-restriction
1079       (message "Updating archive...")
1080       (widen)
1081       (let ((writer  (save-excursion (set-buffer archive-superior-buffer)
1082                                      (archive-name "write-file-member")))
1083             (archive (save-excursion (set-buffer archive-superior-buffer)
1084                                      (archive-maybe-copy (buffer-file-name)))))
1085         (if (fboundp writer)
1086             (funcall writer archive archive-subfile-mode)
1087           (archive-*-write-file-member archive
1088                                        archive-subfile-mode
1089                                        (symbol-value writer)))
1090         (set-buffer-modified-p nil)
1091         (message "Updating archive...done"))
1092       (set-buffer archive-superior-buffer)
1093       (if (not archive-remote) (revert-buffer) (archive-maybe-update nil))))
1094   ;; Restore the value of last-coding-system-used, so that basic-save-buffer
1095   ;; won't reset the coding-system of this archive member.
1096   (if (local-variable-p 'archive-member-coding-system)
1097       (setq last-coding-system-used archive-member-coding-system))
1098   t)
1099
1100 (defun archive-*-write-file-member (archive descr command)
1101   (let* ((ename (aref descr 0))
1102          (tmpfile (expand-file-name ename archive-tmpdir))
1103          (top (directory-file-name (file-name-as-directory archive-tmpdir)))
1104          (default-directory (file-name-as-directory top)))
1105     (unwind-protect
1106         (progn
1107           (make-directory (file-name-directory tmpfile) t)
1108           ;; If the member is itself an archive, write it without
1109           ;; the dired-like listing we created.
1110           (if (eq major-mode 'archive-mode)
1111               (archive-write-file tmpfile)
1112             (write-region (point-min) (point-max) tmpfile nil 'nomessage))
1113           ;; basic-save-buffer needs last-coding-system-used to have
1114           ;; the value used to write the file, so save it before any
1115           ;; further processing clobbers it (we restore it in
1116           ;; archive-write-file-member, above).
1117           (setq archive-member-coding-system last-coding-system-used)
1118           (if (aref descr 3)
1119               ;; Set the file modes, but make sure we can read it.
1120               (set-file-modes tmpfile (logior ?\400 (aref descr 3))))
1121           (if enable-multibyte-characters
1122               (setq ename
1123                     (encode-coding-string ename file-name-coding-system)))
1124           (let ((exitcode (apply 'call-process
1125                                  (car command)
1126                                  nil
1127                                  nil
1128                                  nil
1129                                  (append (cdr command) (list archive ename)))))
1130             (if (equal exitcode 0)
1131                 nil
1132               (error "Updating was unsuccessful (%S)" exitcode))))
1133       (archive-delete-local tmpfile))))
1134
1135 (defun archive-write-file (&optional file)
1136   (save-excursion
1137     (let ((coding-system-for-write 'no-conversion))
1138       (write-region archive-proper-file-start (point-max)
1139                     (or file buffer-file-name) nil t)
1140       (set-buffer-modified-p nil))
1141     t))
1142 ;; -------------------------------------------------------------------------
1143 ;; Section: Marking and unmarking.
1144
1145 (defun archive-flag-deleted (p &optional type)
1146   "In archive mode, mark this member to be deleted from the archive.
1147 With a prefix argument, mark that many files."
1148   (interactive "p")
1149   (or type (setq type ?D))
1150   (beginning-of-line)
1151   (let ((sign (if (>= p 0) +1 -1))
1152         (modified (buffer-modified-p))
1153         buffer-read-only)
1154     (while (not (zerop p))
1155       (if (archive-get-descr t)
1156           (progn
1157             (delete-char 1)
1158             (insert type)))
1159       (forward-line sign)
1160       (setq p (- p sign)))
1161     (set-buffer-modified-p modified))
1162   (archive-next-line 0))
1163
1164 (defun archive-unflag (p)
1165   "In archive mode, un-mark this member if it is marked to be deleted.
1166 With a prefix argument, un-mark that many files forward."
1167   (interactive "p")
1168   (archive-flag-deleted p ? ))
1169
1170 (defun archive-unflag-backwards (p)
1171   "In archive mode, un-mark this member if it is marked to be deleted.
1172 With a prefix argument, un-mark that many members backward."
1173   (interactive "p")
1174   (archive-flag-deleted (- p) ? ))
1175
1176 (defun archive-unmark-all-files ()
1177   "Remove all marks."
1178   (interactive)
1179   (let ((modified (buffer-modified-p))
1180         buffer-read-only)
1181     (save-excursion
1182       (goto-char archive-file-list-start)
1183       (while (< (point) archive-file-list-end)
1184         (or (= (following-char) ? )
1185             (progn (delete-char 1) (insert ? )))
1186         (forward-line 1)))
1187     (set-buffer-modified-p modified)))
1188
1189 (defun archive-mark (p)
1190   "In archive mode, mark this member for group operations.
1191 With a prefix argument, mark that many members.
1192 Use \\[archive-unmark-all-files] to remove all marks."
1193   (interactive "p")
1194   (archive-flag-deleted p ?*))
1195
1196 (defun archive-get-marked (mark &optional default)
1197   (let (files)
1198     (save-excursion
1199       (goto-char archive-file-list-start)
1200       (while (< (point) archive-file-list-end)
1201         (if (= (following-char) mark)
1202             (setq files (cons (archive-get-descr) files)))
1203         (forward-line 1)))
1204     (or (nreverse files)
1205         (and default
1206              (list (archive-get-descr))))))
1207 ;; -------------------------------------------------------------------------
1208 ;; Section: Operate
1209
1210 (defun archive-next-line (p)
1211   (interactive "p")
1212   (forward-line p)
1213   (or (eobp)
1214       (forward-char archive-file-name-indent)))
1215
1216 (defun archive-previous-line (p)
1217   (interactive "p")
1218   (archive-next-line (- p)))
1219
1220 (defun archive-chmod-entry (new-mode)
1221   "Change the protection bits associated with all marked or this member.
1222 The new protection bits can either be specified as an octal number or
1223 as a relative change like \"g+rw\" as for chmod(2)"
1224   (interactive "sNew mode (octal or relative): ")
1225   (if archive-read-only (error "Archive is read-only"))
1226   (let ((func (archive-name "chmod-entry")))
1227     (if (fboundp func)
1228         (progn
1229           (funcall func new-mode (archive-get-marked ?* t))
1230           (archive-resummarize))
1231       (error "Setting mode bits is not supported for this archive type"))))
1232
1233 (defun archive-chown-entry (new-uid)
1234   "Change the owner of all marked or this member."
1235   (interactive "nNew uid: ")
1236   (if archive-read-only (error "Archive is read-only"))
1237   (let ((func (archive-name "chown-entry")))
1238     (if (fboundp func)
1239         (progn
1240           (funcall func new-uid (archive-get-marked ?* t))
1241           (archive-resummarize))
1242       (error "Setting owner is not supported for this archive type"))))
1243
1244 (defun archive-chgrp-entry (new-gid)
1245   "Change the group of all marked or this member."
1246   (interactive "nNew gid: ")
1247   (if archive-read-only (error "Archive is read-only"))
1248   (let ((func (archive-name "chgrp-entry")))
1249     (if (fboundp func)
1250         (progn
1251           (funcall func new-gid (archive-get-marked ?* t))
1252           (archive-resummarize))
1253       (error "Setting group is not supported for this archive type"))))
1254
1255 (defun archive-expunge ()
1256   "Do the flagged deletions."
1257   (interactive)
1258   (let (files)
1259     (save-excursion
1260       (goto-char archive-file-list-start)
1261       (while (< (point) archive-file-list-end)
1262         (if (= (following-char) ?D)
1263             (setq files (cons (aref (archive-get-descr) 0) files)))
1264         (forward-line 1)))
1265     (setq files (nreverse files))
1266     (and files
1267          (or (not archive-read-only)
1268              (error "Archive is read-only"))
1269          (or (yes-or-no-p (format "Really delete %d member%s? "
1270                                   (length files)
1271                                   (if (null (cdr files)) "" "s")))
1272              (error "Operation aborted"))
1273          (let ((archive (archive-maybe-copy (buffer-file-name)))
1274                (expunger (archive-name "expunge")))
1275            (if (fboundp expunger)
1276                (funcall expunger archive files)
1277              (archive-*-expunge archive files (symbol-value expunger)))
1278            (archive-maybe-update nil)
1279            (if archive-remote
1280                (archive-resummarize)
1281              (revert-buffer))))))
1282
1283 (defun archive-*-expunge (archive files command)
1284   (apply 'call-process
1285          (car command)
1286          nil
1287          nil
1288          nil
1289          (append (cdr command) (cons archive files))))
1290
1291 (defun archive-rename-entry (newname)
1292   "Change the name associated with this entry in the tar file."
1293   (interactive "sNew name: ")
1294   (if archive-read-only (error "Archive is read-only"))
1295   (if (string= newname "")
1296       (error "Archive members may not be given empty names"))
1297   (let ((func (archive-name "rename-entry"))
1298         (descr (archive-get-descr)))
1299     (if (fboundp func)
1300         (progn
1301           (funcall func (buffer-file-name)
1302                    (if enable-multibyte-characters
1303                        (encode-coding-string newname file-name-coding-system)
1304                      newname)
1305                    descr)
1306           (archive-resummarize))
1307       (error "Renaming is not supported for this archive type"))))
1308
1309 ;; Revert the buffer and recompute the dired-like listing.
1310 (defun archive-mode-revert (&optional no-auto-save no-confirm)
1311   (let ((no (archive-get-lineno)))
1312     (setq archive-files nil)
1313     (let ((revert-buffer-function nil)
1314           (coding-system-for-read 'no-conversion))
1315       (set-buffer-multibyte nil)
1316       (revert-buffer t t))
1317     (archive-mode)
1318     (goto-char archive-file-list-start)
1319     (archive-next-line no)))
1320
1321 (defun archive-undo ()
1322   "Undo in an archive buffer.
1323 This doesn't recover lost files, it just undoes changes in the buffer itself."
1324   (interactive)
1325   (let (buffer-read-only)
1326     (undo)))
1327 ;; -------------------------------------------------------------------------
1328 ;; Section: Arc Archives
1329
1330 (defun archive-arc-summarize ()
1331   (let ((p 1)
1332         (totalsize 0)
1333         (maxlen 8)
1334         files
1335         visual)
1336     (while (and (< (+ p 29) (point-max))
1337                 (= (char-after p) ?\C-z)
1338                 (> (char-after (1+ p)) 0))
1339       (let* ((namefld (buffer-substring (+ p 2) (+ p 2 13)))
1340              (fnlen   (or (string-match "\0" namefld) 13))
1341              (efnname (substring namefld 0 fnlen))
1342              (csize   (archive-l-e (+ p 15) 4))
1343              (moddate (archive-l-e (+ p 19) 2))
1344              (modtime (archive-l-e (+ p 21) 2))
1345              (ucsize  (archive-l-e (+ p 25) 4))
1346              (fiddle  (string= efnname (upcase efnname)))
1347              (ifnname (if fiddle (downcase efnname) efnname))
1348              (text    (format "  %8d  %-11s  %-8s  %s"
1349                               ucsize
1350                               (archive-dosdate moddate)
1351                               (archive-dostime modtime)
1352                               ifnname)))
1353         (setq maxlen (max maxlen fnlen)
1354               totalsize (+ totalsize ucsize)
1355               visual (cons (vector text
1356                                    (- (length text) (length ifnname))
1357                                    (length text))
1358                            visual)
1359               files (cons (vector efnname ifnname fiddle nil (1- p))
1360                           files)
1361               p (+ p 29 csize))))
1362     (goto-char (point-min))
1363     (let ((dash (concat "- --------  -----------  --------  "
1364                         (make-string maxlen ?-)
1365                         "\n")))
1366       (insert "M   Length  Date         Time      File\n"
1367               dash)
1368       (archive-summarize-files (nreverse visual))
1369       (insert dash
1370               (format "  %8d                         %d file%s"
1371                       totalsize
1372                       (length files)
1373                       (if (= 1 (length files)) "" "s"))
1374               "\n"))
1375     (apply 'vector (nreverse files))))
1376
1377 (defun archive-arc-rename-entry (archive newname descr)
1378   (if (string-match "[:\\\\/]" newname)
1379       (error "File names in arc files may not contain a path"))
1380   (if (> (length newname) 12)
1381       (error "File names in arc files are limited to 12 characters"))
1382   (let ((name (concat newname (substring "\0\0\0\0\0\0\0\0\0\0\0\0\0"
1383                                          (length newname))))
1384         buffer-read-only)
1385     (save-restriction
1386       (save-excursion
1387         (widen)
1388         (set-buffer-multibyte nil)
1389         (goto-char (+ archive-proper-file-start (aref descr 4) 2))
1390         (delete-char 13)
1391         (insert name)))))
1392 ;; -------------------------------------------------------------------------
1393 ;; Section: Lzh Archives
1394
1395 (defun archive-lzh-summarize ()
1396   (let ((p 1)
1397         (totalsize 0)
1398         (maxlen 8)
1399         files
1400         visual)
1401     (while (progn (goto-char p)
1402                   (looking-at "\\(.\\|\n\\)\\(.\\|\n\\)-l[hz][0-9ds]-"))
1403       (let* ((hsize   (char-after p))
1404              (csize   (archive-l-e (+ p 7) 4))
1405              (ucsize  (archive-l-e (+ p 11) 4))
1406              (modtime (archive-l-e (+ p 15) 2))
1407              (moddate (archive-l-e (+ p 17) 2))
1408              (hdrlvl  (char-after (+ p 20)))
1409              (fnlen   (char-after (+ p 21)))
1410              (efnname (let ((str (buffer-substring (+ p 22) (+ p 22 fnlen))))
1411                         (if file-name-coding-system
1412                             (decode-coding-string str file-name-coding-system)
1413                           (string-as-multibyte str))))
1414              (fiddle  (string= efnname (upcase efnname)))
1415              (ifnname (if fiddle (downcase efnname) efnname))
1416              (width (string-width ifnname))
1417              (p2      (+ p 22 fnlen))
1418              (creator (if (>= (- hsize fnlen) 24) (char-after (+ p2 2)) 0))
1419              mode modestr uid gid text path prname
1420              )
1421         (if (= hdrlvl 0)
1422             (setq mode    (if (= creator ?U) (archive-l-e (+ p2 8) 2) ?\666)
1423                   uid     (if (= creator ?U) (archive-l-e (+ p2 10) 2))
1424                   gid     (if (= creator ?U) (archive-l-e (+ p2 12) 2)))
1425           (if (= creator ?U)
1426               (let* ((p3 (+ p2 3))
1427                      (hsize (archive-l-e p3 2))
1428                      (etype (char-after (+ p3 2))))
1429                 (while (not (= hsize 0))
1430                   (cond
1431                    ((= etype 2) (let ((i (+ p3 3)))
1432                                   (while (< i (+ p3 hsize))
1433                                     (setq path (concat path
1434                                                        (if (= (char-after i)
1435                                                               255)
1436                                                            "/"
1437                                                          (char-to-string
1438                                                           (char-after i)))))
1439                                     (setq i (1+ i)))))
1440                    ((= etype 80) (setq mode (archive-l-e (+ p3 3) 2)))
1441                    ((= etype 81) (progn (setq uid (archive-l-e (+ p3 3) 2))
1442                                         (setq gid (archive-l-e (+ p3 5) 2))))
1443                    )
1444                   (setq p3 (+ p3 hsize))
1445                   (setq hsize (archive-l-e p3 2))
1446                   (setq etype (char-after (+ p3 2)))))))
1447         (setq prname (if path (concat path ifnname) ifnname))
1448         (setq modestr (if mode (archive-int-to-mode mode) "??????????"))
1449         (setq text    (if archive-alternate-display
1450                           (format "  %8d  %5S  %5S  %s"
1451                                   ucsize
1452                                   (or uid "?")
1453                                   (or gid "?")
1454                                   ifnname)
1455                         (format "  %10s  %8d  %-11s  %-8s  %s"
1456                                 modestr
1457                                 ucsize
1458                                 (archive-dosdate moddate)
1459                                 (archive-dostime modtime)
1460                                 ifnname)))
1461         (setq maxlen (max maxlen width)
1462               totalsize (+ totalsize ucsize)
1463               visual (cons (vector text
1464                                    (- (length text) (length ifnname))
1465                                    (length text))
1466                            visual)
1467               files (cons (vector prname ifnname fiddle mode (1- p))
1468                           files)
1469               p (+ p hsize 2 csize))))
1470     (goto-char (point-min))
1471     (set-buffer-multibyte default-enable-multibyte-characters)
1472     (let ((dash (concat (if archive-alternate-display
1473                             "- --------  -----  -----  "
1474                           "- ----------  --------  -----------  --------  ")
1475                         (make-string maxlen ?-)
1476                         "\n"))
1477           (header (if archive-alternate-display
1478                        "M   Length    Uid    Gid  File\n"
1479                     "M   Filemode    Length  Date         Time      File\n"))
1480           (sumline (if archive-alternate-display
1481                        "  %8d                %d file%s"
1482                      "              %8d                         %d file%s")))
1483       (insert header dash)
1484       (archive-summarize-files (nreverse visual))
1485       (insert dash
1486               (format sumline
1487                       totalsize
1488                       (length files)
1489                       (if (= 1 (length files)) "" "s"))
1490               "\n"))
1491     (apply 'vector (nreverse files))))
1492
1493 (defconst archive-lzh-alternate-display t)
1494
1495 (defun archive-lzh-extract (archive name)
1496   (archive-extract-by-stdout archive name archive-lzh-extract))
1497
1498 (defun archive-lzh-resum (p count)
1499   (let ((sum 0))
1500     (while (> count 0)
1501       (setq count (1- count)
1502             sum (+ sum (char-after p))
1503             p (1+ p)))
1504     (logand sum 255)))
1505
1506 (defun archive-lzh-rename-entry (archive newname descr)
1507   (save-restriction
1508     (save-excursion
1509       (widen)
1510       (set-buffer-multibyte nil)
1511       (let* ((p        (+ archive-proper-file-start (aref descr 4)))
1512              (oldhsize (char-after p))
1513              (oldfnlen (char-after (+ p 21)))
1514              (newfnlen (length newname))
1515              (newhsize (+ oldhsize newfnlen (- oldfnlen)))
1516              buffer-read-only)
1517         (if (> newhsize 255)
1518             (error "The file name is too long"))
1519         (goto-char (+ p 21))
1520         (delete-char (1+ oldfnlen))
1521         (insert newfnlen newname)
1522         (goto-char p)
1523         (delete-char 2)
1524         (insert newhsize (archive-lzh-resum p newhsize))))))
1525
1526 (defun archive-lzh-ogm (newval files errtxt ofs)
1527   (save-restriction
1528     (save-excursion
1529       (widen)
1530       (set-buffer-multibyte nil)
1531       (while files
1532         (let* ((fil (car files))
1533                (p (+ archive-proper-file-start (aref fil 4)))
1534                (hsize   (char-after p))
1535                (fnlen   (char-after (+ p 21)))
1536                (p2      (+ p 22 fnlen))
1537                (creator (if (>= (- hsize fnlen) 24) (char-after (+ p2 2)) 0))
1538                buffer-read-only)
1539           (if (= creator ?U)
1540               (progn
1541                 (or (numberp newval)
1542                     (setq newval (funcall newval (archive-l-e (+ p2 ofs) 2))))
1543                 (goto-char (+ p2 ofs))
1544                 (delete-char 2)
1545                 (insert (logand newval 255) (lsh newval -8))
1546                 (goto-char (1+ p))
1547                 (delete-char 1)
1548                 (insert (archive-lzh-resum (1+ p) hsize)))
1549             (message "Member %s does not have %s field"
1550                      (aref fil 1) errtxt)))
1551         (setq files (cdr files))))))
1552
1553 (defun archive-lzh-chown-entry (newuid files)
1554   (archive-lzh-ogm newuid files "an uid" 10))
1555
1556 (defun archive-lzh-chgrp-entry (newgid files)
1557   (archive-lzh-ogm newgid files "a gid" 12))
1558
1559 (defun archive-lzh-chmod-entry (newmode files)
1560   (archive-lzh-ogm
1561    ;; This should work even though newmode will be dynamically accessed.
1562    (function (lambda (old) (archive-calc-mode old newmode t)))
1563    files "a unix-style mode" 8))
1564 ;; -------------------------------------------------------------------------
1565 ;; Section: Zip Archives
1566
1567 (defun archive-zip-summarize ()
1568   (goto-char (- (point-max) (- 22 18)))
1569   (search-backward-regexp "[P]K\005\006")
1570   (let ((p (1+ (archive-l-e (+ (point) 16) 4)))
1571         (maxlen 8)
1572         (totalsize 0)
1573         files
1574         visual)
1575     (while (string= "PK\001\002" (buffer-substring p (+ p 4)))
1576       (let* ((creator (char-after (+ p 5)))
1577              (method  (archive-l-e (+ p 10) 2))
1578              (modtime (archive-l-e (+ p 12) 2))
1579              (moddate (archive-l-e (+ p 14) 2))
1580              (ucsize  (archive-l-e (+ p 24) 4))
1581              (fnlen   (archive-l-e (+ p 28) 2))
1582              (exlen   (archive-l-e (+ p 30) 2))
1583              (fclen   (archive-l-e (+ p 32) 2))
1584              (lheader (archive-l-e (+ p 42) 4))
1585              (efnname (let ((str (buffer-substring (+ p 46) (+ p 46 fnlen))))
1586                         (if file-name-coding-system
1587                             (decode-coding-string str file-name-coding-system)
1588                           (string-as-multibyte str))))
1589              (isdir   (and (= ucsize 0)
1590                            (string= (file-name-nondirectory efnname) "")))
1591              (mode    (cond ((memq creator '(2 3)) ; Unix + VMS
1592                              (archive-l-e (+ p 40) 2))
1593                             ((memq creator '(0 5 6 7 10 11 15)) ; Dos etc.
1594                              (logior ?\444
1595                                      (if isdir (logior 16384 ?\111) 0)
1596                                      (if (zerop
1597                                           (logand 1 (char-after (+ p 38))))
1598                                          ?\222 0)))
1599                             (t nil)))
1600              (modestr (if mode (archive-int-to-mode mode) "??????????"))
1601              (fiddle  (and archive-zip-case-fiddle
1602                            (not (not (memq creator '(0 2 4 5 9))))
1603                            (string= (upcase efnname) efnname)))
1604              (ifnname (if fiddle (downcase efnname) efnname))
1605              (width (string-width ifnname))
1606              (text    (format "  %10s  %8d  %-11s  %-8s  %s"
1607                               modestr
1608                               ucsize
1609                               (archive-dosdate moddate)
1610                               (archive-dostime modtime)
1611                               ifnname)))
1612         (setq maxlen (max maxlen width)
1613               totalsize (+ totalsize ucsize)
1614               visual (cons (vector text
1615                                    (- (length text) (length ifnname))
1616                                    (length text))
1617                            visual)
1618               files (cons (if isdir
1619                               nil
1620                             (vector efnname ifnname fiddle mode
1621                                     (list (1- p) lheader)))
1622                           files)
1623               p (+ p 46 fnlen exlen fclen))))
1624     (goto-char (point-min))
1625     (let ((dash (concat "- ----------  --------  -----------  --------  "
1626                         (make-string maxlen ?-)
1627                         "\n")))
1628       (insert "M Filemode      Length  Date         Time      File\n"
1629               dash)
1630       (archive-summarize-files (nreverse visual))
1631       (insert dash
1632               (format "              %8d                         %d file%s"
1633                       totalsize
1634                       (length files)
1635                       (if (= 1 (length files)) "" "s"))
1636               "\n"))
1637     (apply 'vector (nreverse files))))
1638
1639 (defun archive-zip-extract (archive name)
1640   (if archive-zip-use-pkzip
1641       (archive-*-extract archive name archive-zip-extract)
1642     (archive-extract-by-stdout archive name archive-zip-extract)))
1643
1644 (defun archive-zip-write-file-member (archive descr)
1645   (archive-*-write-file-member
1646    archive
1647    descr
1648    (if (aref descr 2) archive-zip-update-case archive-zip-update)))
1649
1650 (defun archive-zip-chmod-entry (newmode files)
1651   (save-restriction
1652     (save-excursion
1653       (widen)
1654       (set-buffer-multibyte nil)
1655       (while files
1656         (let* ((fil (car files))
1657                (p (+ archive-proper-file-start (car (aref fil 4))))
1658                (creator (char-after (+ p 5)))
1659                (oldmode (aref fil 3))
1660                (newval  (archive-calc-mode oldmode newmode t))
1661                buffer-read-only)
1662           (cond ((memq creator '(2 3)) ; Unix + VMS
1663                  (goto-char (+ p 40))
1664                  (delete-char 2)
1665                  (insert (logand newval 255) (lsh newval -8)))
1666                 ((memq creator '(0 5 6 7 10 11 15)) ; Dos etc.
1667                  (goto-char (+ p 38))
1668                  (insert (logior (logand (char-after (point)) 254)
1669                                  (logand (logxor 1 (lsh newval -7)) 1)))
1670                  (delete-char 1))
1671                 (t (message "Don't know how to change mode for this member"))))
1672         (setq files (cdr files))))))
1673 ;; -------------------------------------------------------------------------
1674 ;; Section: Zoo Archives
1675
1676 (defun archive-zoo-summarize ()
1677   (let ((p (1+ (archive-l-e 25 4)))
1678         (maxlen 8)
1679         (totalsize 0)
1680         files
1681         visual)
1682     (while (and (string= "\334\247\304\375" (buffer-substring p (+ p 4)))
1683                 (> (archive-l-e (+ p 6) 4) 0))
1684       (let* ((next    (1+ (archive-l-e (+ p 6) 4)))
1685              (moddate (archive-l-e (+ p 14) 2))
1686              (modtime (archive-l-e (+ p 16) 2))
1687              (ucsize  (archive-l-e (+ p 20) 4))
1688              (namefld (buffer-substring (+ p 38) (+ p 38 13)))
1689              (dirtype (char-after (+ p 4)))
1690              (lfnlen  (if (= dirtype 2) (char-after (+ p 56)) 0))
1691              (ldirlen (if (= dirtype 2) (char-after (+ p 57)) 0))
1692              (fnlen   (or (string-match "\0" namefld) 13))
1693              (efnname (let ((str
1694                              (concat
1695                               (if (> ldirlen 0)
1696                                   (concat (buffer-substring
1697                                            (+ p 58 lfnlen)
1698                                            (+ p 58 lfnlen ldirlen -1))
1699                                           "/")
1700                                 "")
1701                               (if (> lfnlen 0)
1702                                   (buffer-substring (+ p 58)
1703                                                     (+ p 58 lfnlen -1))
1704                                 (substring namefld 0 fnlen)))))
1705                         (if file-name-coding-system
1706                             (decode-coding-string str file-name-coding-system)
1707                           (string-as-multibyte str))))
1708              (fiddle  (and (= lfnlen 0) (string= efnname (upcase efnname))))
1709              (ifnname (if fiddle (downcase efnname) efnname))
1710              (width (string-width ifnname))
1711              (text    (format "  %8d  %-11s  %-8s  %s"
1712                               ucsize
1713                               (archive-dosdate moddate)
1714                               (archive-dostime modtime)
1715                               ifnname)))
1716         (setq maxlen (max maxlen width)
1717               totalsize (+ totalsize ucsize)
1718               visual (cons (vector text
1719                                    (- (length text) (length ifnname))
1720                                    (length text))
1721                            visual)
1722               files (cons (vector efnname ifnname fiddle nil (1- p))
1723                           files)
1724               p next)))
1725     (goto-char (point-min))
1726     (let ((dash (concat "- --------  -----------  --------  "
1727                         (make-string maxlen ?-)
1728                         "\n")))
1729       (insert "M   Length  Date         Time      File\n"
1730               dash)
1731       (archive-summarize-files (nreverse visual))
1732       (insert dash
1733               (format "  %8d                         %d file%s"
1734                       totalsize
1735                       (length files)
1736                       (if (= 1 (length files)) "" "s"))
1737               "\n"))
1738     (apply 'vector (nreverse files))))
1739
1740 (defun archive-zoo-extract (archive name)
1741   (archive-extract-by-stdout archive name archive-zoo-extract))
1742 ;; -------------------------------------------------------------------------
1743 ;; This line was a mistake; it is kept now for compatibility.
1744 ;; rms  15 Oct 98
1745 (provide 'archive-mode)
1746
1747 (provide 'arc-mode)
1748
1749 ;;; arc-mode.el ends here