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 the 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
 124    (expand-file-name (if (eq system-type 'ms-dos) "ar" "archive.tmp")
 125                      temporary-file-directory))
 126   "*Directory for temporary files made by arc-mode.el"
 127   :type 'directory
 128   :group 'archive)
 129
 130 (defcustom archive-remote-regexp "^/[^/:]*[^/:.]:"
 131   "*Regexp recognizing archive files names that are not local.
 132 A non-local file is one whose file name is not proper outside Emacs.
 133 A local copy of the archive will be used when updating."
 134   :type 'regexp
 135   :group 'archive)
 136
 137 (defcustom archive-extract-hooks nil
 138   "*Hooks to run when an archive member has been extracted."
 139   :type 'hook
 140   :group 'archive)
 141 ;; ------------------------------
 142 ;; Arc archive configuration
 143
 144 ;; We always go via a local file since there seems to be no reliable way
 145 ;; to extract to stdout without junk getting added.
 146 (defcustom archive-arc-extract
 147   '("arc" "x")
 148   "*Program and its options to run in order to extract an arc file member.
 149 Extraction should happen to the current directory.  Archive and member
 150 name will be added."
 151   :type '(list (string :tag "Program")
 152                 (repeat :tag "Options"
 153                         :inline t
 154                         (string :format "%v")))
 155   :group 'archive-arc)
 156
 157 (defcustom archive-arc-expunge
 158   '("arc" "d")
 159   "*Program and its options to run in order to delete arc file members.
 160 Archive and member names will be added."
 161   :type '(list (string :tag "Program")
 162                 (repeat :tag "Options"
 163                         :inline t
 164                         (string :format "%v")))
 165   :group 'archive-arc)
 166
 167 (defcustom archive-arc-write-file-member
 168   '("arc" "u")
 169   "*Program and its options to run in order to update an arc file member.
 170 Archive and member name will be added."
 171   :type '(list (string :tag "Program")
 172                 (repeat :tag "Options"
 173                         :inline t
 174                         (string :format "%v")))
 175   :group 'archive-arc)
 176 ;; ------------------------------
 177 ;; Lzh archive configuration
 178
 179 (defcustom archive-lzh-extract
 180   '("lha" "pq")
 181   "*Program and its options to run in order to extract an lzh file member.
 182 Extraction should happen to standard output.  Archive and member name will
 183 be added."
 184   :type '(list (string :tag "Program")
 185                 (repeat :tag "Options"
 186                         :inline t
 187                         (string :format "%v")))
 188   :group 'archive-lzh)
 189
 190 (defcustom archive-lzh-expunge
 191   '("lha" "d")
 192   "*Program and its options to run in order to delete lzh file members.
 193 Archive and member names will be added."
 194   :type '(list (string :tag "Program")
 195                 (repeat :tag "Options"
 196                         :inline t
 197                         (string :format "%v")))
 198   :group 'archive-lzh)
 199
 200 (defcustom archive-lzh-write-file-member
 201   '("lha" "a")
 202   "*Program and its options to run in order to update an lzh file member.
 203 Archive and member name will be added."
 204   :type '(list (string :tag "Program")
 205                 (repeat :tag "Options"
 206                         :inline t
 207                         (string :format "%v")))
 208   :group 'archive-lzh)
 209 ;; ------------------------------
 210 ;; Zip archive configuration
 211
 212 (defcustom archive-zip-use-pkzip (memq system-type '(ms-dos windows-nt))
 213   "*If non-nil then pkzip option are used instead of zip options.
 214 Only set to true for msdog systems!"
 215   :type 'boolean
 216   :group 'archive-zip)
 217
 218 (defcustom archive-zip-extract
 219   (if archive-zip-use-pkzip '("pkunzip" "-e" "-o-") '("unzip" "-qq" "-c"))
 220   "*Program and its options to run in order to extract a zip file member.
 221 Extraction should happen to standard output.  Archive and member name will
 222 be added.  If `archive-zip-use-pkzip' is non-nil then this program is
 223 expected to extract to a file junking the directory part of the name."
 224   :type '(list (string :tag "Program")
 225                 (repeat :tag "Options"
 226                         :inline t
 227                         (string :format "%v")))
 228   :group 'archive-zip)
 229
 230 ;; For several reasons the latter behaviour is not desirable in general.
 231 ;; (1) It uses more disk space.  (2) Error checking is worse or non-
 232 ;; existent.  (3) It tends to do funny things with other systems' file
 233 ;; names.
 234
 235 (defcustom archive-zip-expunge
 236   (if archive-zip-use-pkzip '("pkzip" "-d") '("zip" "-d" "-q"))
 237   "*Program and its options to run in order to delete zip file members.
 238 Archive and member names will be added."
 239   :type '(list (string :tag "Program")
 240                 (repeat :tag "Options"
 241                         :inline t
 242                         (string :format "%v")))
 243   :group 'archive-zip)
 244
 245 (defcustom archive-zip-update
 246   (if archive-zip-use-pkzip '("pkzip" "-u" "-P") '("zip" "-q"))
 247   "*Program and its options to run in order to update a zip file member.
 248 Options should ensure that specified directory will be put into the zip
 249 file.  Archive and member name will be added."
 250   :type '(list (string :tag "Program")
 251                 (repeat :tag "Options"
 252                         :inline t
 253                         (string :format "%v")))
 254   :group 'archive-zip)
 255
 256 (defcustom archive-zip-update-case
 257   (if archive-zip-use-pkzip archive-zip-update '("zip" "-q" "-k"))
 258   "*Program and its options to run in order to update a case fiddled zip member.
 259 Options should ensure that specified directory will be put into the zip file.
 260 Archive and member name will be added."
 261   :type '(list (string :tag "Program")
 262                 (repeat :tag "Options"
 263                         :inline t
 264                         (string :format "%v")))
 265   :group 'archive-zip)
 266
 267 (defcustom archive-zip-case-fiddle t
 268   "*If non-nil then zip file members may be down-cased.
 269 This case fiddling will only happen for members created by a system
 270 that uses caseless file names."
 271   :type 'boolean
 272   :group 'archive-zip)
 273 ;; ------------------------------
 274 ;; Zoo archive configuration
 275
 276 (defcustom archive-zoo-extract
 277   '("zoo" "xpq")
 278   "*Program and its options to run in order to extract a zoo file member.
 279 Extraction should happen to standard output.  Archive and member name will
 280 be added."
 281   :type '(list (string :tag "Program")
 282                 (repeat :tag "Options"
 283                         :inline t
 284                         (string :format "%v")))
 285   :group 'archive-zoo)
 286
 287 (defcustom archive-zoo-expunge
 288   '("zoo" "DqPP")
 289   "*Program and its options to run in order to delete zoo file members.
 290 Archive and member names will be added."
 291   :type '(list (string :tag "Program")
 292                 (repeat :tag "Options"
 293                         :inline t
 294                         (string :format "%v")))
 295   :group 'archive-zoo)
 296
 297 (defcustom archive-zoo-write-file-member
 298   '("zoo" "a")
 299   "*Program and its options to run in order to update a zoo file member.
 300 Archive and member name will be added."
 301   :type '(list (string :tag "Program")
 302                 (repeat :tag "Options"
 303                         :inline t
 304                         (string :format "%v")))
 305   :group 'archive-zoo)
 306 ;; -------------------------------------------------------------------------
 307 ;; Section: Variables
 308
 309 (defvar archive-subtype nil "*Symbol describing archive type.")
 310 (defvar archive-file-list-start nil "*Position of first contents line.")
 311 (defvar archive-file-list-end nil "*Position just after last contents line.")
 312 (defvar archive-proper-file-start nil "*Position of real archive's start.")
 313 (defvar archive-read-only nil "*Non-nil if the archive is read-only on disk.")
 314 (defvar archive-local-name nil "*Name of local copy of remote archive.")
 315 (defvar archive-mode-map nil "*Local keymap for archive mode listings.")
 316 (defvar archive-file-name-indent nil "*Column where file names start.")
 317
 318 (defvar archive-remote nil "*Non-nil if the archive is outside file system.")
 319 (make-variable-buffer-local 'archive-remote)
 320 (put 'archive-remote 'permanent-local t)
 321
 322 (defvar archive-member-coding-system nil "Coding-system of archive member.")
 323 (make-variable-buffer-local 'archive-member-coding-system)
 324
 325 (defvar archive-alternate-display nil
 326   "*Non-nil when alternate information is shown.")
 327 (make-variable-buffer-local 'archive-alternate-display)
 328 (put 'archive-alternate-display 'permanent-local t)
 329
 330 (defvar archive-superior-buffer nil "*In archive members, points to archive.")
 331 (put 'archive-superior-buffer 'permanent-local t)
 332
 333 (defvar archive-subfile-mode nil "*Non-nil in archive member buffers.")
 334 (make-variable-buffer-local 'archive-subfile-mode)
 335 (put 'archive-subfile-mode 'permanent-local t)
 336
 337 (defvar archive-files nil
 338   "Vector of file descriptors.
 339 Each descriptor is a vector of the form
 340  [EXT-FILE-NAME INT-FILE-NAME CASE-FIDDLED MODE ...]")
 341 (make-variable-buffer-local 'archive-files)
 342
 343 (defvar archive-lemacs
 344   (string-match "\\(Lucid\\|Xemacs\\)" emacs-version)
 345   "*Non-nil when running under under Lucid Emacs or Xemacs.")
 346 ;; -------------------------------------------------------------------------
 347 ;; Section: Support functions.
 348
 349 (defsubst archive-name (suffix)
 350   (intern (concat "archive-" (symbol-name archive-subtype) "-" suffix)))
 351
 352 (defun archive-l-e (str &optional len)
 353   "Convert little endian string/vector to integer.
 354 Alternatively, first argument may be a buffer position in the current buffer
 355 in which case a second argument, length, should be supplied."
 356   (if (stringp str)
 357       (setq len (length str))
 358     (setq str (buffer-substring str (+ str len))))
 359   (let ((result 0)
 360         (i 0))
 361     (while (< i len)
 362       (setq i (1+ i)
 363             result (+ (ash result 8) (aref str (- len i)))))
 364     result))
 365
 366 (defun archive-int-to-mode (mode)
 367   "Turn an integer like 0700 (i.e., 448) into a mode string like -rwx------"
 368   (let ((str (make-string 10 ?-)))
 369     (or (zerop (logand 16384 mode)) (aset str 0 ?d))
 370     (or (zerop (logand  8192 mode)) (aset str 0 ?c)) ; completeness
 371     (or (zerop (logand   256 mode)) (aset str 1 ?r))
 372     (or (zerop (logand   128 mode)) (aset str 2 ?w))
 373     (or (zerop (logand    64 mode)) (aset str 3 ?x))
 374     (or (zerop (logand    32 mode)) (aset str 4 ?r))
 375     (or (zerop (logand    16 mode)) (aset str 5 ?w))
 376     (or (zerop (logand     8 mode)) (aset str 6 ?x))
 377     (or (zerop (logand     4 mode)) (aset str 7 ?r))
 378     (or (zerop (logand     2 mode)) (aset str 8 ?w))
 379     (or (zerop (logand     1 mode)) (aset str 9 ?x))
 380     (or (zerop (logand  1024 mode)) (aset str 3 (if (zerop (logand 64 mode))
 381                                                     ?S ?s)))
 382     (or (zerop (logand  2048 mode)) (aset str 6 (if (zerop (logand  8 mode))
 383                                                     ?S ?s)))
 384     str))
 385
 386 (defun archive-calc-mode (oldmode newmode &optional error)
 387   "From the integer OLDMODE and the string NEWMODE calculate a new file mode.
 388 NEWMODE may be an octal number including a leading zero in which case it
 389 will become the new mode.\n
 390 NEWMODE may also be a relative specification like \"og-rwx\" in which case
 391 OLDMODE will be modified accordingly just like chmod(2) would have done.\n
 392 If optional third argument ERROR is non-nil an error will be signaled if
 393 the mode is invalid.  If ERROR is nil then nil will be returned."
 394   (cond ((string-match "^0[0-7]*$" newmode)
 395          (let ((result 0)
 396                (len (length newmode))
 397                (i 1))
 398            (while (< i len)
 399              (setq result (+ (lsh result 3) (aref newmode i) (- ?0))
 400                    i (1+ i)))
 401            (logior (logand oldmode 65024) result)))
 402         ((string-match "^\\([agou]+\\)\\([---+=]\\)\\([rwxst]+\\)$" newmode)
 403          (let ((who 0)
 404                (result oldmode)
 405                (op (aref newmode (match-beginning 2)))
 406                (bits 0)
 407                (i (match-beginning 3)))
 408            (while (< i (match-end 3))
 409              (let ((rwx (aref newmode i)))
 410                (setq bits (logior bits (cond ((= rwx ?r)  292)
 411                                              ((= rwx ?w)  146)
 412                                              ((= rwx ?x)   73)
 413                                              ((= rwx ?s) 3072)
 414                                              ((= rwx ?t)  512)))
 415                      i (1+ i))))
 416            (while (< who (match-end 1))
 417              (let* ((whoc (aref newmode who))
 418                     (whomask (cond ((= whoc ?a) 4095)
 419                                    ((= whoc ?u) 1472)
 420                                    ((= whoc ?g) 2104)
 421                                    ((= whoc ?o)    7))))
 422                (if (= op ?=)
 423                    (setq result (logand result (lognot whomask))))
 424                (if (= op ?-)
 425                    (setq result (logand result (lognot (logand whomask bits))))
 426                  (setq result (logior result (logand whomask bits)))))
 427              (setq who (1+ who)))
 428            result))
 429         (t
 430          (if error
 431              (error "Invalid mode specification: %s" newmode)))))
 432
 433 (defun archive-dosdate (date)
 434   "Stringify dos packed DATE record."
 435   (let ((year (+ 1980 (logand (ash date -9) 127)))
 436         (month (logand (ash date -5) 15))
 437         (day (logand date 31)))
 438     (if (or (> month 12) (< month 1))
 439         ""
 440       (format "%2d-%s-%d"
 441               day
 442               (aref ["Jan" "Feb" "Mar" "Apr" "May" "Jun"
 443                      "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"] (1- month))
 444               year))))
 445
 446 (defun archive-dostime (time)
 447   "Stringify dos packed TIME record."
 448   (let ((hour (logand (ash time -11) 31))
 449         (minute (logand (ash time -5) 53))
 450         (second (* 2 (logand time 31)))) ; 2 seconds resolution
 451     (format "%02d:%02d:%02d" hour minute second)))
 452
 453 ;;(defun archive-unixdate (low high)
 454 ;;  "Stringify unix (LOW HIGH) date."
 455 ;;  (let ((str (current-time-string (cons high low))))
 456 ;;    (format "%s-%s-%s"
 457 ;;          (substring str 8 9)
 458 ;;          (substring str 4 7)
 459 ;;          (substring str 20 24))))
 460
 461 ;;(defun archive-unixtime (low high)
 462 ;;  "Stringify unix (LOW HIGH) time."
 463 ;;  (let ((str (current-time-string (cons high low))))
 464 ;;    (substring str 11 19)))
 465
 466 (defun archive-get-lineno ()
 467   (if (>= (point) archive-file-list-start)
 468       (count-lines archive-file-list-start
 469                    (save-excursion (beginning-of-line) (point)))
 470     0))
 471
 472 (defun archive-get-descr (&optional noerror)
 473   "Return the descriptor vector for file at point.
 474 Does not signal an error if optional second argument NOERROR is non-nil."
 475   (let ((no (archive-get-lineno)))
 476     (if (and (>= (point) archive-file-list-start)
 477              (< no (length archive-files)))
 478         (let ((item (aref archive-files no)))
 479           (if (vectorp item)
 480               item
 481             (if (not noerror)
 482                 (error "Entry is not a regular member of the archive"))))
 483       (if (not noerror)
 484           (error "Line does not describe a member of the archive")))))
 485 ;; -------------------------------------------------------------------------
 486 ;; Section: the mode definition
 487
 488 ;;;###autoload
 489 (defun archive-mode (&optional force)
 490   "Major mode for viewing an archive file in a dired-like way.
 491 You can move around using the usual cursor motion commands.
 492 Letters no longer insert themselves.
 493 Type `e' to pull a file out of the archive and into its own buffer;
 494 or click mouse-2 on the file's line in the archive mode buffer.
 495
 496 If you edit a sub-file of this archive (as with the `e' command) and
 497 save it, the contents of that buffer will be saved back into the
 498 archive.
 499
 500 \\{archive-mode-map}"
 501   ;; This is not interactive because you shouldn't be turning this
 502   ;; mode on and off.  You can corrupt things that way.
 503   (if (zerop (buffer-size))
 504       ;; At present we cannot create archives from scratch
 505       (funcall default-major-mode)
 506     (if (and (not force) archive-files) nil
 507       (let* ((type (archive-find-type))
 508              (typename (copy-sequence (symbol-name type))))
 509         (aset typename 0 (upcase (aref typename 0)))
 510         (kill-all-local-variables)
 511         (make-local-variable 'archive-subtype)
 512         (setq archive-subtype type)
 513
 514         ;; Buffer contains treated image of file before the file contents
 515         (make-local-variable 'revert-buffer-function)
 516         (setq revert-buffer-function 'archive-mode-revert)
 517         (auto-save-mode 0)
 518
 519         ;; Remote archives are not written by a hook.
 520         (if archive-remote nil
 521           (make-local-variable 'write-contents-hooks)
 522           (add-hook 'write-contents-hooks 'archive-write-file))
 523
 524         (make-local-variable 'require-final-newline)
 525         (setq require-final-newline nil)
 526         (make-local-variable 'local-enable-local-variables)
 527         (setq local-enable-local-variables nil)
 528
 529         ;; Prevent loss of data when saving the file.
 530         (make-local-variable 'file-precious-flag)
 531         (setq file-precious-flag t)
 532
 533         (make-local-variable 'archive-read-only)
 534         ;; Archives which are inside other archives and whose
 535         ;; names are invalid for this OS, can't be written.
 536         (setq archive-read-only
 537               (or (not (file-writable-p (buffer-file-name)))
 538                   (and archive-subfile-mode
 539                        (string-match file-name-invalid-regexp
 540                                      (aref archive-subfile-mode 0)))))
 541
 542         ;; Should we use a local copy when accessing from outside Emacs?
 543         (make-local-variable 'archive-local-name)
 544
 545         ;; An archive can contain another archive whose name is invalid
 546         ;; on local filesystem.  Treat such archives as remote.
 547         (or archive-remote
 548             (setq archive-remote
 549                   (or (string-match archive-remote-regexp (buffer-file-name))
 550                       (string-match file-name-invalid-regexp
 551                                     (buffer-file-name)))))
 552
 553         (setq major-mode 'archive-mode)
 554         (setq mode-name (concat typename "-Archive"))
 555         ;; Run archive-foo-mode-hook and archive-mode-hook
 556         (run-hooks (archive-name "mode-hook") 'archive-mode-hook)
 557         (use-local-map archive-mode-map))
 558
 559       (make-local-variable 'archive-proper-file-start)
 560       (make-local-variable 'archive-file-list-start)
 561       (make-local-variable 'archive-file-list-end)
 562       (make-local-variable 'archive-file-name-indent)
 563       (archive-summarize nil)
 564       (setq buffer-read-only t))))
 565
 566 ;; Archive mode is suitable only for specially formatted data.
 567 (put 'archive-mode 'mode-class 'special)
 568 ;; -------------------------------------------------------------------------
 569 ;; Section: Key maps
 570
 571 (if archive-mode-map nil
 572   (setq archive-mode-map (make-keymap))
 573   (suppress-keymap archive-mode-map)
 574   (define-key archive-mode-map " " 'archive-next-line)
 575   (define-key archive-mode-map "a" 'archive-alternate-display)
 576   ;;(define-key archive-mode-map "c" 'archive-copy)
 577   (define-key archive-mode-map "d" 'archive-flag-deleted)
 578   (define-key archive-mode-map "\C-d" 'archive-flag-deleted)
 579   (define-key archive-mode-map "e" 'archive-extract)
 580   (define-key archive-mode-map "f" 'archive-extract)
 581   (define-key archive-mode-map "\C-m" 'archive-extract)
 582   (define-key archive-mode-map "g" 'revert-buffer)
 583   (define-key archive-mode-map "h" 'describe-mode)
 584   (define-key archive-mode-map "m" 'archive-mark)
 585   (define-key archive-mode-map "n" 'archive-next-line)
 586   (define-key archive-mode-map "\C-n" 'archive-next-line)
 587   (define-key archive-mode-map [down] 'archive-next-line)
 588   (define-key archive-mode-map "o" 'archive-extract-other-window)
 589   (define-key archive-mode-map "p" 'archive-previous-line)
 590   (define-key archive-mode-map "q" 'quit-window)
 591   (define-key archive-mode-map "\C-p" 'archive-previous-line)
 592   (define-key archive-mode-map [up] 'archive-previous-line)
 593   (define-key archive-mode-map "r" 'archive-rename-entry)
 594   (define-key archive-mode-map "u" 'archive-unflag)
 595   (define-key archive-mode-map "\M-\C-?" 'archive-unmark-all-files)
 596   (define-key archive-mode-map "v" 'archive-view)
 597   (define-key archive-mode-map "x" 'archive-expunge)
 598   (define-key archive-mode-map "\177" 'archive-unflag-backwards)
 599   (define-key archive-mode-map "E" 'archive-extract-other-window)
 600   (define-key archive-mode-map "M" 'archive-chmod-entry)
 601   (define-key archive-mode-map "G" 'archive-chgrp-entry)
 602   (define-key archive-mode-map "O" 'archive-chown-entry)
 603
 604   (if archive-lemacs
 605       (progn
 606         ;; Not a nice "solution" but it'll have to do
 607         (define-key archive-mode-map "\C-xu" 'archive-undo)
 608         (define-key archive-mode-map "\C-_" 'archive-undo))
 609     (substitute-key-definition 'undo 'archive-undo
 610                                archive-mode-map global-map))
 611
 612   (define-key archive-mode-map
 613     (if archive-lemacs 'button2 [mouse-2]) 'archive-mouse-extract)
 614
 615   (if archive-lemacs
 616       ()                                ; out of luck
 617
 618     (define-key archive-mode-map [menu-bar immediate]
 619       (cons "Immediate" (make-sparse-keymap "Immediate")))
 620     (define-key archive-mode-map [menu-bar immediate alternate]
 621       '(menu-item "Alternate Display" archive-alternate-display
 622                   :enable (boundp (archive-name "alternate-display"))
 623                   :help "Toggle alternate file info display"))
 624     (define-key archive-mode-map [menu-bar immediate view]
 625       '(menu-item "View This File" archive-view
 626                   :help "Display file at cursor in View Mode"))
 627     (define-key archive-mode-map [menu-bar immediate display]
 628       '(menu-item "Display in Other Window" archive-display-other-window
 629                   :help "Display file at cursor in another window"))
 630     (define-key archive-mode-map [menu-bar immediate find-file-other-window]
 631       '(menu-item "Find in Other Window" archive-extract-other-window
 632                   :help "Edit file at cursor in another window"))
 633     (define-key archive-mode-map [menu-bar immediate find-file]
 634       '(menu-item "Find This File" archive-extract
 635                   :help "Extract file at cursor and edit it"))
 636
 637     (define-key archive-mode-map [menu-bar mark]
 638       (cons "Mark" (make-sparse-keymap "Mark")))
 639     (define-key archive-mode-map [menu-bar mark unmark-all]
 640       '(menu-item "Unmark All" archive-unmark-all-files
 641                   :help "Unmark all marked files"))
 642     (define-key archive-mode-map [menu-bar mark deletion]
 643       '(menu-item "Flag" archive-flag-deleted
 644                   :help "Flag file at cursor for deletion"))
 645     (define-key archive-mode-map [menu-bar mark unmark]
 646       '(menu-item "Unflag" archive-unflag
 647                   :help "Unmark file at cursor"))
 648     (define-key archive-mode-map [menu-bar mark mark]
 649       '(menu-item "Mark" archive-mark
 650                   :help "Mark file at cursor"))
 651
 652     (define-key archive-mode-map [menu-bar operate]
 653       (cons "Operate" (make-sparse-keymap "Operate")))
 654     (define-key archive-mode-map [menu-bar operate chown]
 655       '(menu-item "Change Owner..." archive-chown-entry
 656                   :enable (fboundp (archive-name "chown-entry"))
 657                   :help "Change owner of marked files"))
 658     (define-key archive-mode-map [menu-bar operate chgrp]
 659       '(menu-item "Change Group..." archive-chgrp-entry
 660                   :enable (fboundp (archive-name "chgrp-entry"))
 661                   :help "Change group ownership of marked files"))
 662     (define-key archive-mode-map [menu-bar operate chmod]
 663       '(menu-item "Change Mode..." archive-chmod-entry
 664                   :enable (fboundp (archive-name "chmod-entry"))
 665                   :help "Change mode (permissions) of marked files"))
 666     (define-key archive-mode-map [menu-bar operate rename]
 667       '(menu-item "Rename to..." archive-rename-entry
 668                   :enable (fboundp (archive-name "rename-entry"))
 669                   :help "Rename marked files"))
 670     ;;(define-key archive-mode-map [menu-bar operate copy]
 671     ;;  '(menu-item "Copy to..." archive-copy))
 672     (define-key archive-mode-map [menu-bar operate expunge]
 673       '(menu-item "Expunge Marked Files" archive-expunge
 674                   :help "Delete all flagged files from archive"))
 675   ))
 676
 677 (let* ((item1 '(archive-subfile-mode " Archive"))
 678        (items (list item1)))
 679   (or (member item1 minor-mode-alist)
 680       (setq minor-mode-alist (append items minor-mode-alist))))
 681 ;; -------------------------------------------------------------------------
 682 (defun archive-find-type ()
 683   (widen)
 684   (goto-char (point-min))
 685   ;; The funny [] here make it unlikely that the .elc file will be treated
 686   ;; as an archive by other software.
 687   (let (case-fold-search)
 688     (cond ((looking-at "[P]K\003\004") 'zip)
 689           ((looking-at "..-l[hz][0-9ds]-") 'lzh)
 690           ((looking-at "....................[\334]\247\304\375") 'zoo)
 691           ((and (looking-at "\C-z")     ; signature too simple, IMHO
 692                 (string-match "\\.[aA][rR][cC]$"
 693                               (or buffer-file-name (buffer-name))))
 694            'arc)
 695           (t (error "Buffer format not recognized.")))))
 696 ;; -------------------------------------------------------------------------
 697 (defun archive-summarize (&optional shut-up)
 698   "Parse the contents of the archive file in the current buffer.
 699 Place a dired-like listing on the front;
 700 then narrow to it, so that only that listing
 701 is visible (and the real data of the buffer is hidden).
 702 Optional argument SHUT-UP, if non-nil, means don't print messages
 703 when parsing the archive."
 704   (widen)
 705   (set-buffer-multibyte nil)
 706   (let (buffer-read-only)
 707     (or shut-up
 708         (message "Parsing archive file..."))
 709     (buffer-disable-undo (current-buffer))
 710     (setq archive-files (funcall (archive-name "summarize")))
 711     (or shut-up
 712         (message "Parsing archive file...done."))
 713     (setq archive-proper-file-start (point-marker))
 714     (narrow-to-region (point-min) (point))
 715     (set-buffer-modified-p nil)
 716     (buffer-enable-undo))
 717   (goto-char archive-file-list-start)
 718   (archive-next-line 0))
 719
 720 (defun archive-resummarize ()
 721   "Recreate the contents listing of an archive."
 722   (let ((modified (buffer-modified-p))
 723         (no (archive-get-lineno))
 724         buffer-read-only)
 725     (widen)
 726     (delete-region (point-min) archive-proper-file-start)
 727     (archive-summarize t)
 728     (set-buffer-modified-p modified)
 729     (goto-char archive-file-list-start)
 730     (archive-next-line no)))
 731
 732 (defun archive-summarize-files (files)
 733   "Insert a description of a list of files annotated with proper mouse face."
 734   (setq archive-file-list-start (point-marker))
 735   (setq archive-file-name-indent (if files (aref (car files) 1) 0))
 736   ;; We don't want to do an insert for each element since that takes too
 737   ;; long when the archive -- which has to be moved in memory -- is large.
 738   (insert
 739    (apply
 740     (function concat)
 741     (mapcar
 742      (function
 743       (lambda (fil)
 744         ;; Using `concat' here copies the text also, so we can add
 745         ;; properties without problems.
 746         (let ((text (concat (aref fil 0) "\n")))
 747           (if archive-lemacs
 748               ()                        ; out of luck
 749             (put-text-property (aref fil 1) (aref fil 2)
 750                                'mouse-face 'highlight
 751                                text))
 752           text)))
 753      files)))
 754   (setq archive-file-list-end (point-marker)))
 755
 756 (defun archive-alternate-display ()
 757   "Toggle alternative display.
 758 To avoid very long lines some archive mode don't show all information.
 759 This function changes the set of information shown for each files."
 760   (interactive)
 761   (setq archive-alternate-display (not archive-alternate-display))
 762   (archive-resummarize))
 763 ;; -------------------------------------------------------------------------
 764 ;; Section: Local archive copy handling
 765
 766 (defun archive-unique-fname (fname dir)
 767   "Make sure a file FNAME can be created uniquely in directory DIR.
 768
 769 If FNAME can be uniquely created in DIR, it is returned unaltered.
 770 If FNAME is something our underlying filesystem can't grok, or if another
 771 file by that name already exists in DIR, a unique new name is generated
 772 using `make-temp-name', and the generated name is returned."
 773   (let ((fullname (expand-file-name fname dir))
 774         (alien (string-match file-name-invalid-regexp fname)))
 775     (if (or alien (file-exists-p fullname))
 776         (make-temp-name
 777          (expand-file-name
 778           (if (and (eq system-type 'ms-dos) (not (msdos-long-file-names)))
 779               "am"
 780             "arc-mode.")
 781           dir))
 782       fullname)))
 783
 784 (defun archive-maybe-copy (archive)
 785   (let ((coding-system-for-write 'no-conversion))
 786     (if archive-remote
 787         (let ((start (point-max))
 788               ;; Sometimes ARCHIVE is invalid while its actual name, as
 789               ;; recorded in its parent archive, is not.  For example, an
 790               ;; archive bar.zip inside another archive foo.zip gets a name
 791               ;; "foo.zip:bar.zip", which is invalid on DOS/Windows.
 792               ;; So use the actual name if available.
 793               (archive-name
 794                (or (and archive-subfile-mode (aref archive-subfile-mode 0))
 795                    archive)))
 796           (make-directory archive-tmpdir t)
 797           (setq archive-local-name
 798                 (archive-unique-fname archive-name archive-tmpdir))
 799           (save-restriction
 800             (widen)
 801             (write-region start (point-max) archive-local-name nil 'nomessage))
 802           archive-local-name)
 803       (if (buffer-modified-p) (save-buffer))
 804       archive)))
 805
 806 (defun archive-maybe-update (unchanged)
 807   (if archive-remote
 808       (let ((name archive-local-name)
 809             (modified (buffer-modified-p))
 810             (coding-system-for-read 'no-conversion)
 811             (lno (archive-get-lineno))
 812             buffer-read-only)
 813         (if unchanged nil
 814           (setq archive-files nil)
 815           (erase-buffer)
 816           (insert-file-contents name)
 817           (archive-mode t)
 818           (goto-char archive-file-list-start)
 819           (archive-next-line lno))
 820         (archive-delete-local name)
 821         (if (not unchanged)
 822             (message
 823              "Buffer `%s' must be saved for changes to take effect"
 824              (buffer-name (current-buffer))))
 825         (set-buffer-modified-p (or modified (not unchanged))))))
 826
 827 (defun archive-delete-local (name)
 828   "Delete file NAME and its parents up to and including `archive-tmpdir'."
 829   (let ((again t)
 830         (top (directory-file-name (file-name-as-directory archive-tmpdir))))
 831     (condition-case nil
 832         (delete-file name)
 833       (error nil))
 834     (while again
 835       (setq name (directory-file-name (file-name-directory name)))
 836       (condition-case nil
 837           (delete-directory name)
 838         (error nil))
 839       (if (string= name top) (setq again nil)))))
 840 ;; -------------------------------------------------------------------------
 841 ;; Section: Member extraction
 842
 843 (defun archive-file-name-handler (op &rest args)
 844   (or (eq op 'file-exists-p)
 845       (let ((file-name-handler-alist nil))
 846         (apply op args))))
 847
 848 (defun archive-set-buffer-as-visiting-file (filename)
 849   "Set the current buffer as if it were visiting FILENAME."
 850   (save-excursion
 851     (goto-char (point-min))
 852     (let ((coding
 853            (or coding-system-for-read
 854                (and set-auto-coding-function
 855                     (save-excursion
 856                       (funcall set-auto-coding-function
 857                                filename (- (point-max) (point-min)))))
 858                ;; dos-w32.el defines find-operation-coding-system for
 859                ;; DOS/Windows systems which preserves the coding-system
 860                ;; of existing files.  We want it to act here as if the
 861                ;; extracted file existed.
 862                (let ((file-name-handler-alist
 863                       '(("" . archive-file-name-handler))))
 864                  (car (find-operation-coding-system 'insert-file-contents
 865                                                     filename t))))))
 866       (if (and (not coding-system-for-read)
 867                (not enable-multibyte-characters))
 868           (setq coding
 869                 (coding-system-change-text-conversion coding 'raw-text)))
 870       (if (and coding
 871                (not (eq coding 'no-conversion)))
 872           (decode-coding-region (point-min) (point-max) coding)
 873         (setq last-coding-system-used coding))
 874       (set-buffer-modified-p nil)
 875       (kill-local-variable 'buffer-file-coding-system)
 876       (after-insert-file-set-buffer-file-coding-system (- (point-max)
 877                                                           (point-min))))))
 878
 879 (defun archive-mouse-extract (event)
 880   "Extract a file whose name you click on."
 881   (interactive "e")
 882   (mouse-set-point event)
 883   (switch-to-buffer
 884    (save-excursion
 885      (archive-extract)
 886      (current-buffer))))
 887
 888 (defun archive-extract (&optional other-window-p)
 889   "In archive mode, extract this entry of the archive into its own buffer."
 890   (interactive)
 891   (let* ((view-p (eq other-window-p 'view))
 892          (descr (archive-get-descr))
 893          (ename (aref descr 0))
 894          (iname (aref descr 1))
 895          (archive-buffer (current-buffer))
 896          (arcdir default-directory)
 897          (archive (buffer-file-name))
 898          (arcname (file-name-nondirectory archive))
 899          (bufname (concat (file-name-nondirectory iname) " (" arcname ")"))
 900          (extractor (archive-name "extract"))
 901          ;; Members with file names which aren't valid for the
 902          ;; underlying filesystem, are treated as read-only.
 903          (read-only-p (or archive-read-only
 904                           view-p
 905                           (string-match file-name-invalid-regexp ename)))
 906          (buffer (get-buffer bufname))
 907          (just-created nil))
 908       (if buffer
 909           nil
 910         (setq archive (archive-maybe-copy archive))
 911         (setq buffer (get-buffer-create bufname))
 912         (setq just-created t)
 913         (save-excursion
 914           (set-buffer buffer)
 915           (setq buffer-file-name
 916                 (expand-file-name (concat arcname ":" iname)))
 917           (setq buffer-file-truename
 918                 (abbreviate-file-name buffer-file-name))
 919           ;; Set the default-directory to the dir of the superior buffer.
 920           (setq default-directory arcdir)
 921           (make-local-variable 'archive-superior-buffer)
 922           (setq archive-superior-buffer archive-buffer)
 923           (make-local-variable 'local-write-file-hooks)
 924           (add-hook 'local-write-file-hooks 'archive-write-file-member)
 925           (setq archive-subfile-mode descr)
 926           (if (and
 927                (null
 928                 (let (;; We may have to encode file name arguement for
 929                       ;; external programs.
 930                       (coding-system-for-write
 931                        (and enable-multibyte-characters
 932                             file-name-coding-system))
 933                       ;; We read an archive member by no-conversion at
 934                       ;; first, then decode appropriately by calling
 935                       ;; archive-set-buffer-as-visiting-file later.
 936                       (coding-system-for-read 'no-conversion))
 937                   (condition-case err
 938                       (if (fboundp extractor)
 939                           (funcall extractor archive ename)
 940                         (archive-*-extract archive ename
 941                                            (symbol-value extractor)))
 942                     (error
 943                      (ding (message "%s" (error-message-string err)))
 944                      nil))))
 945                just-created)
 946               (progn
 947                 (set-buffer-modified-p nil)
 948                 (kill-buffer buffer))
 949             (archive-set-buffer-as-visiting-file ename)
 950             (goto-char (point-min))
 951             (rename-buffer bufname)
 952             (setq buffer-read-only read-only-p)
 953             (setq buffer-undo-list nil)
 954             (set-buffer-modified-p nil)
 955             (setq buffer-saved-size (buffer-size))
 956             (normal-mode)
 957             ;; Just in case an archive occurs inside another archive.
 958             (if (eq major-mode 'archive-mode)
 959                 (progn
 960                   (setq archive-remote t)
 961                   (if read-only-p (setq archive-read-only t))
 962                   ;; We will write out the archive ourselves if it is
 963                   ;; part of another archive.
 964                   (remove-hook 'write-contents-hooks 'archive-write-file t)))
 965             (run-hooks 'archive-extract-hooks)
 966             (if archive-read-only
 967                 (message "Note: altering this archive is not implemented."))))
 968         (archive-maybe-update t))
 969       (or (not (buffer-name buffer))
 970           (progn
 971             (if view-p
 972                 (view-buffer buffer (and just-created 'kill-buffer))
 973               (if (eq other-window-p 'display)
 974                   (display-buffer buffer)
 975                 (if other-window-p
 976                     (switch-to-buffer-other-window buffer)
 977                   (switch-to-buffer buffer))))))))
 978
 979 (defun archive-*-extract (archive name command)
 980   (let* ((default-directory (file-name-as-directory archive-tmpdir))
 981          (tmpfile (expand-file-name (file-name-nondirectory name)
 982                                     default-directory))
 983          exit-status success)
 984     (make-directory (directory-file-name default-directory) t)
 985     (setq exit-status
 986           (apply 'call-process
 987                  (car command)
 988                  nil
 989                  nil
 990                  nil
 991                  (append (cdr command) (list archive name))))
 992     (cond ((and (numberp exit-status) (= exit-status 0))
 993            (if (not (file-exists-p tmpfile))
 994                (ding (message "`%s': no such file or directory" tmpfile))
 995              (insert-file-contents tmpfile)
 996              (setq success t)))
 997           ((numberp exit-status)
 998            (ding
 999             (message "`%s' exited with status %d" (car command) exit-status)))
1000           ((stringp exit-status)
1001            (ding (message "`%s' aborted: %s" (car command) exit-status)))
1002           (t
1003            (ding (message "`%s' failed" (car command)))))
1004     (archive-delete-local tmpfile)
1005     success))
1006
1007 (defun archive-extract-by-stdout (archive name command)
1008   (apply 'call-process
1009          (car command)
1010          nil
1011          t
1012          nil
1013          (append (cdr command) (list archive name))))
1014
1015 (defun archive-extract-other-window ()
1016   "In archive mode, find this member in another window."
1017   (interactive)
1018   (archive-extract t))
1019
1020 (defun archive-display-other-window ()
1021   "In archive mode, display this member in another window."
1022   (interactive)
1023   (archive-extract 'display))
1024
1025 (defun archive-view ()
1026   "In archive mode, view the member on this line."
1027   (interactive)
1028   (archive-extract 'view))
1029
1030 (defun archive-add-new-member (arcbuf name)
1031   "Add current buffer to the archive in ARCBUF naming it NAME."
1032   (interactive
1033    (list (get-buffer
1034           (read-buffer "Buffer containing archive: "
1035                        ;; Find first archive buffer and suggest that
1036                        (let ((bufs (buffer-list)))
1037                          (while (and bufs (not (eq (save-excursion
1038                                                      (set-buffer (car bufs))
1039                                                      major-mode)
1040                                                    'archive-mode)))
1041                            (setq bufs (cdr bufs)))
1042                          (if bufs
1043                              (car bufs)
1044                            (error "There are no archive buffers")))
1045                        t))
1046          (read-string "File name in archive: "
1047                       (if buffer-file-name
1048                           (file-name-nondirectory buffer-file-name)
1049                         ""))))
1050   (save-excursion
1051     (set-buffer arcbuf)
1052     (or (eq major-mode 'archive-mode)
1053         (error "Buffer is not an archive buffer"))
1054     (if archive-read-only
1055         (error "Archive is read-only")))
1056   (if (eq arcbuf (current-buffer))
1057       (error "An archive buffer cannot be added to itself"))
1058   (if (string= name "")
1059       (error "Archive members may not be given empty names"))
1060   (let ((func (save-excursion (set-buffer arcbuf)
1061                               (archive-name "add-new-member")))
1062         (membuf (current-buffer)))
1063     (if (fboundp func)
1064         (save-excursion
1065           (set-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  (save-excursion (set-buffer archive-superior-buffer)
1077                                      (archive-name "write-file-member")))
1078             (archive (save-excursion (set-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         buffer-read-only)
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     (set-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 ? ))
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) ? ))
1170
1171 (defun archive-unmark-all-files ()
1172   "Remove all marks."
1173   (interactive)
1174   (let ((modified (buffer-modified-p))
1175         buffer-read-only)
1176     (save-excursion
1177       (goto-char archive-file-list-start)
1178       (while (< (point) archive-file-list-end)
1179         (or (= (following-char) ? )
1180             (progn (delete-char 1) (insert ? )))
1181         (forward-line 1)))
1182     (set-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 tar 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 (buffer-file-name)
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 (buffer-read-only)
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 (archive newname descr)
1373   (if (string-match "[:\\\\/]" newname)
1374       (error "File names in arc files may not contain a path"))
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         buffer-read-only)
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)
1397                   (looking-at "\\(.\\|\n\\)\\(.\\|\n\\)-l[hz][0-9ds]-"))
1398       (let* ((hsize   (char-after p))
1399              (csize   (archive-l-e (+ p 7) 4))
1400              (ucsize  (archive-l-e (+ p 11) 4))
1401              (modtime (archive-l-e (+ p 15) 2))
1402              (moddate (archive-l-e (+ p 17) 2))
1403              (hdrlvl  (char-after (+ p 20)))
1404              (fnlen   (char-after (+ p 21)))
1405              (efnname (let ((str (buffer-substring (+ p 22) (+ p 22 fnlen))))
1406                         (if file-name-coding-system
1407                             (decode-coding-string str file-name-coding-system)
1408                           (string-as-multibyte str))))
1409              (fiddle  (string= efnname (upcase efnname)))
1410              (ifnname (if fiddle (downcase efnname) efnname))
1411              (width (string-width ifnname))
1412              (p2      (+ p 22 fnlen))
1413              (creator (if (>= (- hsize fnlen) 24) (char-after (+ p2 2)) 0))
1414              mode modestr uid gid text path prname
1415              )
1416         (if (= hdrlvl 0)
1417             (setq mode    (if (= creator ?U) (archive-l-e (+ p2 8) 2) ?\666)
1418                   uid     (if (= creator ?U) (archive-l-e (+ p2 10) 2))
1419                   gid     (if (= creator ?U) (archive-l-e (+ p2 12) 2)))
1420           (if (= creator ?U)
1421               (let* ((p3 (+ p2 3))
1422                      (hsize (archive-l-e p3 2))
1423                      (etype (char-after (+ p3 2))))
1424                 (while (not (= hsize 0))
1425                   (cond
1426                    ((= etype 2) (let ((i (+ p3 3)))
1427                                   (while (< i (+ p3 hsize))
1428                                     (setq path (concat path
1429                                                        (if (= (char-after i)
1430                                                               255)
1431                                                            "/"
1432                                                          (char-to-string
1433                                                           (char-after i)))))
1434                                     (setq i (1+ i)))))
1435                    ((= etype 80) (setq mode (archive-l-e (+ p3 3) 2)))
1436                    ((= etype 81) (progn (setq uid (archive-l-e (+ p3 3) 2))
1437                                         (setq gid (archive-l-e (+ p3 5) 2))))
1438                    )
1439                   (setq p3 (+ p3 hsize))
1440                   (setq hsize (archive-l-e p3 2))
1441                   (setq etype (char-after (+ p3 2)))))))
1442         (setq prname (if path (concat path ifnname) ifnname))
1443         (setq modestr (if mode (archive-int-to-mode mode) "??????????"))
1444         (setq text    (if archive-alternate-display
1445                           (format "  %8d  %5S  %5S  %s"
1446                                   ucsize
1447                                   (or uid "?")
1448                                   (or gid "?")
1449                                   ifnname)
1450                         (format "  %10s  %8d  %-11s  %-8s  %s"
1451                                 modestr
1452                                 ucsize
1453                                 (archive-dosdate moddate)
1454                                 (archive-dostime modtime)
1455                                 ifnname)))
1456         (setq maxlen (max maxlen width)
1457               totalsize (+ totalsize ucsize)
1458               visual (cons (vector text
1459                                    (- (length text) (length ifnname))
1460                                    (length text))
1461                            visual)
1462               files (cons (vector prname ifnname fiddle mode (1- p))
1463                           files)
1464               p (+ p hsize 2 csize))))
1465     (goto-char (point-min))
1466     (set-buffer-multibyte default-enable-multibyte-characters)
1467     (let ((dash (concat (if archive-alternate-display
1468                             "- --------  -----  -----  "
1469                           "- ----------  --------  -----------  --------  ")
1470                         (make-string maxlen ?-)
1471                         "\n"))
1472           (header (if archive-alternate-display
1473                        "M   Length    Uid    Gid  File\n"
1474                     "M   Filemode    Length  Date         Time      File\n"))
1475           (sumline (if archive-alternate-display
1476                        "  %8d                %d file%s"
1477                      "              %8d                         %d file%s")))
1478       (insert header dash)
1479       (archive-summarize-files (nreverse visual))
1480       (insert dash
1481               (format sumline
1482                       totalsize
1483                       (length files)
1484                       (if (= 1 (length files)) "" "s"))
1485               "\n"))
1486     (apply 'vector (nreverse files))))
1487
1488 (defconst archive-lzh-alternate-display t)
1489
1490 (defun archive-lzh-extract (archive name)
1491   (archive-extract-by-stdout archive name archive-lzh-extract))
1492
1493 (defun archive-lzh-resum (p count)
1494   (let ((sum 0))
1495     (while (> count 0)
1496       (setq count (1- count)
1497             sum (+ sum (char-after p))
1498             p (1+ p)))
1499     (logand sum 255)))
1500
1501 (defun archive-lzh-rename-entry (archive newname descr)
1502   (save-restriction
1503     (save-excursion
1504       (widen)
1505       (set-buffer-multibyte nil)
1506       (let* ((p        (+ archive-proper-file-start (aref descr 4)))
1507              (oldhsize (char-after p))
1508              (oldfnlen (char-after (+ p 21)))
1509              (newfnlen (length newname))
1510              (newhsize (+ oldhsize newfnlen (- oldfnlen)))
1511              buffer-read-only)
1512         (if (> newhsize 255)
1513             (error "The file name is too long"))
1514         (goto-char (+ p 21))
1515         (delete-char (1+ oldfnlen))
1516         (insert newfnlen newname)
1517         (goto-char p)
1518         (delete-char 2)
1519         (insert newhsize (archive-lzh-resum p newhsize))))))
1520
1521 (defun archive-lzh-ogm (newval files errtxt ofs)
1522   (save-restriction
1523     (save-excursion
1524       (widen)
1525       (set-buffer-multibyte nil)
1526       (while files
1527         (let* ((fil (car files))
1528                (p (+ archive-proper-file-start (aref fil 4)))
1529                (hsize   (char-after p))
1530                (fnlen   (char-after (+ p 21)))
1531                (p2      (+ p 22 fnlen))
1532                (creator (if (>= (- hsize fnlen) 24) (char-after (+ p2 2)) 0))
1533                buffer-read-only)
1534           (if (= creator ?U)
1535               (progn
1536                 (or (numberp newval)
1537                     (setq newval (funcall newval (archive-l-e (+ p2 ofs) 2))))
1538                 (goto-char (+ p2 ofs))
1539                 (delete-char 2)
1540                 (insert (logand newval 255) (lsh newval -8))
1541                 (goto-char (1+ p))
1542                 (delete-char 1)
1543                 (insert (archive-lzh-resum (1+ p) hsize)))
1544             (message "Member %s does not have %s field"
1545                      (aref fil 1) errtxt)))
1546         (setq files (cdr files))))))
1547
1548 (defun archive-lzh-chown-entry (newuid files)
1549   (archive-lzh-ogm newuid files "an uid" 10))
1550
1551 (defun archive-lzh-chgrp-entry (newgid files)
1552   (archive-lzh-ogm newgid files "a gid" 12))
1553
1554 (defun archive-lzh-chmod-entry (newmode files)
1555   (archive-lzh-ogm
1556    ;; This should work even though newmode will be dynamically accessed.
1557    (function (lambda (old) (archive-calc-mode old newmode t)))
1558    files "a unix-style mode" 8))
1559 ;; -------------------------------------------------------------------------
1560 ;; Section: Zip Archives
1561
1562 (defun archive-zip-summarize ()
1563   (goto-char (- (point-max) (- 22 18)))
1564   (search-backward-regexp "[P]K\005\006")
1565   (let ((p (1+ (archive-l-e (+ (point) 16) 4)))
1566         (maxlen 8)
1567         (totalsize 0)
1568         files
1569         visual)
1570     (while (string= "PK\001\002" (buffer-substring p (+ p 4)))
1571       (let* ((creator (char-after (+ p 5)))
1572              (method  (archive-l-e (+ p 10) 2))
1573              (modtime (archive-l-e (+ p 12) 2))
1574              (moddate (archive-l-e (+ p 14) 2))
1575              (ucsize  (archive-l-e (+ p 24) 4))
1576              (fnlen   (archive-l-e (+ p 28) 2))
1577              (exlen   (archive-l-e (+ p 30) 2))
1578              (fclen   (archive-l-e (+ p 32) 2))
1579              (lheader (archive-l-e (+ p 42) 4))
1580              (efnname (let ((str (buffer-substring (+ p 46) (+ p 46 fnlen))))
1581                         (if file-name-coding-system
1582                             (decode-coding-string str file-name-coding-system)
1583                           (string-as-multibyte str))))
1584              (isdir   (and (= ucsize 0)
1585                            (string= (file-name-nondirectory efnname) "")))
1586              (mode    (cond ((memq creator '(2 3)) ; Unix + VMS
1587                              (archive-l-e (+ p 40) 2))
1588                             ((memq creator '(0 5 6 7 10 11 15)) ; Dos etc.
1589                              (logior ?\444
1590                                      (if isdir (logior 16384 ?\111) 0)
1591                                      (if (zerop
1592                                           (logand 1 (char-after (+ p 38))))
1593                                          ?\222 0)))
1594                             (t nil)))
1595              (modestr (if mode (archive-int-to-mode mode) "??????????"))
1596              (fiddle  (and archive-zip-case-fiddle
1597                            (not (not (memq creator '(0 2 4 5 9))))
1598                            (string= (upcase efnname) efnname)))
1599              (ifnname (if fiddle (downcase efnname) efnname))
1600              (width (string-width ifnname))
1601              (text    (format "  %10s  %8d  %-11s  %-8s  %s"
1602                               modestr
1603                               ucsize
1604                               (archive-dosdate moddate)
1605                               (archive-dostime modtime)
1606                               ifnname)))
1607         (setq maxlen (max maxlen width)
1608               totalsize (+ totalsize ucsize)
1609               visual (cons (vector text
1610                                    (- (length text) (length ifnname))
1611                                    (length text))
1612                            visual)
1613               files (cons (if isdir
1614                               nil
1615                             (vector efnname ifnname fiddle mode
1616                                     (list (1- p) lheader)))
1617                           files)
1618               p (+ p 46 fnlen exlen fclen))))
1619     (goto-char (point-min))
1620     (let ((dash (concat "- ----------  --------  -----------  --------  "
1621                         (make-string maxlen ?-)
1622                         "\n")))
1623       (insert "M Filemode      Length  Date         Time      File\n"
1624               dash)
1625       (archive-summarize-files (nreverse visual))
1626       (insert dash
1627               (format "              %8d                         %d file%s"
1628                       totalsize
1629                       (length files)
1630                       (if (= 1 (length files)) "" "s"))
1631               "\n"))
1632     (apply 'vector (nreverse files))))
1633
1634 (defun archive-zip-extract (archive name)
1635   (if archive-zip-use-pkzip
1636       (archive-*-extract archive name archive-zip-extract)
1637     (archive-extract-by-stdout archive name archive-zip-extract)))
1638
1639 (defun archive-zip-write-file-member (archive descr)
1640   (archive-*-write-file-member
1641    archive
1642    descr
1643    (if (aref descr 2) archive-zip-update-case archive-zip-update)))
1644
1645 (defun archive-zip-chmod-entry (newmode files)
1646   (save-restriction
1647     (save-excursion
1648       (widen)
1649       (set-buffer-multibyte nil)
1650       (while files
1651         (let* ((fil (car files))
1652                (p (+ archive-proper-file-start (car (aref fil 4))))
1653                (creator (char-after (+ p 5)))
1654                (oldmode (aref fil 3))
1655                (newval  (archive-calc-mode oldmode newmode t))
1656                buffer-read-only)
1657           (cond ((memq creator '(2 3)) ; Unix + VMS
1658                  (goto-char (+ p 40))
1659                  (delete-char 2)
1660                  (insert (logand newval 255) (lsh newval -8)))
1661                 ((memq creator '(0 5 6 7 10 11 15)) ; Dos etc.
1662                  (goto-char (+ p 38))
1663                  (insert (logior (logand (char-after (point)) 254)
1664                                  (logand (logxor 1 (lsh newval -7)) 1)))
1665                  (delete-char 1))
1666                 (t (message "Don't know how to change mode for this member"))))
1667         (setq files (cdr files))))))
1668 ;; -------------------------------------------------------------------------
1669 ;; Section: Zoo Archives
1670
1671 (defun archive-zoo-summarize ()
1672   (let ((p (1+ (archive-l-e 25 4)))
1673         (maxlen 8)
1674         (totalsize 0)
1675         files
1676         visual)
1677     (while (and (string= "\334\247\304\375" (buffer-substring p (+ p 4)))
1678                 (> (archive-l-e (+ p 6) 4) 0))
1679       (let* ((next    (1+ (archive-l-e (+ p 6) 4)))
1680              (moddate (archive-l-e (+ p 14) 2))
1681              (modtime (archive-l-e (+ p 16) 2))
1682              (ucsize  (archive-l-e (+ p 20) 4))
1683              (namefld (buffer-substring (+ p 38) (+ p 38 13)))
1684              (dirtype (char-after (+ p 4)))
1685              (lfnlen  (if (= dirtype 2) (char-after (+ p 56)) 0))
1686              (ldirlen (if (= dirtype 2) (char-after (+ p 57)) 0))
1687              (fnlen   (or (string-match "\0" namefld) 13))
1688              (efnname (let ((str
1689                              (concat
1690                               (if (> ldirlen 0)
1691                                   (concat (buffer-substring
1692                                            (+ p 58 lfnlen)
1693                                            (+ p 58 lfnlen ldirlen -1))
1694                                           "/")
1695                                 "")
1696                               (if (> lfnlen 0)
1697                                   (buffer-substring (+ p 58)
1698                                                     (+ p 58 lfnlen -1))
1699                                 (substring namefld 0 fnlen)))))
1700                         (if file-name-coding-system
1701                             (decode-coding-string str file-name-coding-system)
1702                           (string-as-multibyte str))))
1703              (fiddle  (and (= lfnlen 0) (string= efnname (upcase efnname))))
1704              (ifnname (if fiddle (downcase efnname) efnname))
1705              (width (string-width ifnname))
1706              (text    (format "  %8d  %-11s  %-8s  %s"
1707                               ucsize
1708                               (archive-dosdate moddate)
1709                               (archive-dostime modtime)
1710                               ifnname)))
1711         (setq maxlen (max maxlen width)
1712               totalsize (+ totalsize ucsize)
1713               visual (cons (vector text
1714                                    (- (length text) (length ifnname))
1715                                    (length text))
1716                            visual)
1717               files (cons (vector efnname ifnname fiddle nil (1- p))
1718                           files)
1719               p next)))
1720     (goto-char (point-min))
1721     (let ((dash (concat "- --------  -----------  --------  "
1722                         (make-string maxlen ?-)
1723                         "\n")))
1724       (insert "M   Length  Date         Time      File\n"
1725               dash)
1726       (archive-summarize-files (nreverse visual))
1727       (insert dash
1728               (format "  %8d                         %d file%s"
1729                       totalsize
1730                       (length files)
1731                       (if (= 1 (length files)) "" "s"))
1732               "\n"))
1733     (apply 'vector (nreverse files))))
1734
1735 (defun archive-zoo-extract (archive name)
1736   (archive-extract-by-stdout archive name archive-zoo-extract))
1737 ;; -------------------------------------------------------------------------
1738 ;; This line was a mistake; it is kept now for compatibility.
1739 ;; rms  15 Oct 98
1740 (provide 'archive-mode)
1741
1742 (provide 'arc-mode)
1743
1744 ;; arc-mode.el ends here.