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
 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-file-name-coding-system nil)
 338 (make-variable-buffer-local 'archive-file-name-coding-system)
 339 (put 'archive-file-name-coding-system 'permanent-local t)
 340
 341 (defvar archive-files nil
 342   "Vector of file descriptors.
 343 Each descriptor is a vector of the form
 344  [EXT-FILE-NAME INT-FILE-NAME CASE-FIDDLED MODE ...]")
 345 (make-variable-buffer-local 'archive-files)
 346
 347 (defvar archive-lemacs
 348   (string-match "\\(Lucid\\|Xemacs\\)" emacs-version)
 349   "*Non-nil when running under under Lucid Emacs or Xemacs.")
 350 ;; -------------------------------------------------------------------------
 351 ;; Section: Support functions.
 352
 353 (eval-when-compile
 354   (defsubst byte-after (pos)
 355     "Like char-after but an eight-bit char is converted to unibyte."
 356     (multibyte-char-to-unibyte (char-after pos)))
 357   (defsubst bref (string idx)
 358     "Like aref but an eight-bit char is converted to unibyte."
 359     (multibyte-char-to-unibyte (aref string idx)))
 360   (defsubst insert-unibyte (&rest args)
 361     "Like insert but don't make unibyte string and eight-bit char multibyte."
 362     (dolist (elt args)
 363       (if (integerp elt)
 364           (insert (if (< elt 128) elt (decode-char 'eight-bit elt)))
 365         (insert (string-to-multibyte elt)))))
 366   )
 367
 368 (defsubst archive-name (suffix)
 369   (intern (concat "archive-" (symbol-name archive-subtype) "-" suffix)))
 370
 371 (defun archive-l-e (str &optional len)
 372   "Convert little endian string/vector to integer.
 373 Alternatively, first argument may be a buffer position in the current buffer
 374 in which case a second argument, length, should be supplied."
 375   (if (stringp str)
 376       (setq len (length str))
 377     (setq str (buffer-substring str (+ str len))))
 378   (let ((result 0)
 379         (i 0))
 380     (while (< i len)
 381       (setq i (1+ i)
 382             result (+ (ash result 8)
 383                       (bref str (- len i)))))
 384     result))
 385
 386 (defun archive-int-to-mode (mode)
 387   "Turn an integer like 0700 (i.e., 448) into a mode string like -rwx------."
 388   ;; FIXME: merge with tar-grind-file-mode.
 389   (string
 390     (if (zerop (logand  8192 mode))
 391         (if (zerop (logand 16384 mode)) ?- ?d)
 392       ?c) ; completeness
 393     (if (zerop (logand   256 mode)) ?- ?r)
 394     (if (zerop (logand   128 mode)) ?- ?w)
 395     (if (zerop (logand    64 mode))
 396         (if (zerop (logand  1024 mode)) ?- ?S)
 397       (if (zerop (logand  1024 mode)) ?x ?s))
 398     (if (zerop (logand    32 mode)) ?- ?r)
 399     (if (zerop (logand    16 mode)) ?- ?w)
 400     (if (zerop (logand     8 mode))
 401         (if (zerop (logand  2048 mode)) ?- ?S)
 402       (if (zerop (logand  2048 mode)) ?x ?s))
 403     (if (zerop (logand     4 mode)) ?- ?r)
 404     (if (zerop (logand     2 mode)) ?- ?w)
 405     (if (zerop (logand     1 mode)) ?- ?x)))
 406
 407 (defun archive-calc-mode (oldmode newmode &optional error)
 408   "From the integer OLDMODE and the string NEWMODE calculate a new file mode.
 409 NEWMODE may be an octal number including a leading zero in which case it
 410 will become the new mode.\n
 411 NEWMODE may also be a relative specification like \"og-rwx\" in which case
 412 OLDMODE will be modified accordingly just like chmod(2) would have done.\n
 413 If optional third argument ERROR is non-nil an error will be signaled if
 414 the mode is invalid.  If ERROR is nil then nil will be returned."
 415   (cond ((string-match "^0[0-7]*$" newmode)
 416          (let ((result 0)
 417                (len (length newmode))
 418                (i 1))
 419            (while (< i len)
 420              (setq result (+ (lsh result 3) (aref newmode i) (- ?0))
 421                    i (1+ i)))
 422            (logior (logand oldmode 65024) result)))
 423         ((string-match "^\\([agou]+\\)\\([---+=]\\)\\([rwxst]+\\)$" newmode)
 424          (let ((who 0)
 425                (result oldmode)
 426                (op (aref newmode (match-beginning 2)))
 427                (bits 0)
 428                (i (match-beginning 3)))
 429            (while (< i (match-end 3))
 430              (let ((rwx (aref newmode i)))
 431                (setq bits (logior bits (cond ((= rwx ?r)  292)
 432                                              ((= rwx ?w)  146)
 433                                              ((= rwx ?x)   73)
 434                                              ((= rwx ?s) 3072)
 435                                              ((= rwx ?t)  512)))
 436                      i (1+ i))))
 437            (while (< who (match-end 1))
 438              (let* ((whoc (aref newmode who))
 439                     (whomask (cond ((= whoc ?a) 4095)
 440                                    ((= whoc ?u) 1472)
 441                                    ((= whoc ?g) 2104)
 442                                    ((= whoc ?o)    7))))
 443                (if (= op ?=)
 444                    (setq result (logand result (lognot whomask))))
 445                (if (= op ?-)
 446                    (setq result (logand result (lognot (logand whomask bits))))
 447                  (setq result (logior result (logand whomask bits)))))
 448              (setq who (1+ who)))
 449            result))
 450         (t
 451          (if error
 452              (error "Invalid mode specification: %s" newmode)))))
 453
 454 (defun archive-dosdate (date)
 455   "Stringify dos packed DATE record."
 456   (let ((year (+ 1980 (logand (ash date -9) 127)))
 457         (month (logand (ash date -5) 15))
 458         (day (logand date 31)))
 459     (if (or (> month 12) (< month 1))
 460         ""
 461       (format "%2d-%s-%d"
 462               day
 463               (aref ["Jan" "Feb" "Mar" "Apr" "May" "Jun"
 464                      "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"] (1- month))
 465               year))))
 466
 467 (defun archive-dostime (time)
 468   "Stringify dos packed TIME record."
 469   (let ((hour (logand (ash time -11) 31))
 470         (minute (logand (ash time -5) 63))
 471         (second (* 2 (logand time 31)))) ; 2 seconds resolution
 472     (format "%02d:%02d:%02d" hour minute second)))
 473
 474 ;;(defun archive-unixdate (low high)
 475 ;;  "Stringify unix (LOW HIGH) date."
 476 ;;  (let ((str (current-time-string (cons high low))))
 477 ;;    (format "%s-%s-%s"
 478 ;;          (substring str 8 9)
 479 ;;          (substring str 4 7)
 480 ;;          (substring str 20 24))))
 481
 482 ;;(defun archive-unixtime (low high)
 483 ;;  "Stringify unix (LOW HIGH) time."
 484 ;;  (let ((str (current-time-string (cons high low))))
 485 ;;    (substring str 11 19)))
 486
 487 (defun archive-get-lineno ()
 488   (if (>= (point) archive-file-list-start)
 489       (count-lines archive-file-list-start
 490                    (save-excursion (beginning-of-line) (point)))
 491     0))
 492
 493 (defun archive-get-descr (&optional noerror)
 494   "Return the descriptor vector for file at point.
 495 Does not signal an error if optional second argument NOERROR is non-nil."
 496   (let ((no (archive-get-lineno)))
 497     (if (and (>= (point) archive-file-list-start)
 498              (< no (length archive-files)))
 499         (let ((item (aref archive-files no)))
 500           (if (vectorp item)
 501               item
 502             (if (not noerror)
 503                 (error "Entry is not a regular member of the archive"))))
 504       (if (not noerror)
 505           (error "Line does not describe a member of the archive")))))
 506 ;; -------------------------------------------------------------------------
 507 ;; Section: the mode definition
 508
 509 ;;;###autoload
 510 (defun archive-mode (&optional force)
 511   "Major mode for viewing an archive file in a dired-like way.
 512 You can move around using the usual cursor motion commands.
 513 Letters no longer insert themselves.
 514 Type `e' to pull a file out of the archive and into its own buffer;
 515 or click mouse-2 on the file's line in the archive mode buffer.
 516
 517 If you edit a sub-file of this archive (as with the `e' command) and
 518 save it, the contents of that buffer will be saved back into the
 519 archive.
 520
 521 \\{archive-mode-map}"
 522   ;; This is not interactive because you shouldn't be turning this
 523   ;; mode on and off.  You can corrupt things that way.
 524   (if (zerop (buffer-size))
 525       ;; At present we cannot create archives from scratch
 526       (funcall default-major-mode)
 527     (if (and (not force) archive-files) nil
 528       (let* ((type (archive-find-type))
 529              (typename (capitalize (symbol-name type))))
 530         (kill-all-local-variables)
 531         (make-local-variable 'archive-subtype)
 532         (setq archive-subtype type)
 533
 534         ;; Buffer contains treated image of file before the file contents
 535         (make-local-variable 'revert-buffer-function)
 536         (setq revert-buffer-function 'archive-mode-revert)
 537         (auto-save-mode 0)
 538
 539         ;; Remote archives are not written by a hook.
 540         (if archive-remote nil
 541           (make-local-variable 'write-contents-hooks)
 542           (add-hook 'write-contents-hooks 'archive-write-file))
 543
 544         (make-local-variable 'require-final-newline)
 545         (setq require-final-newline nil)
 546         (make-local-variable 'local-enable-local-variables)
 547         (setq local-enable-local-variables nil)
 548
 549         ;; Prevent loss of data when saving the file.
 550         (make-local-variable 'file-precious-flag)
 551         (setq file-precious-flag t)
 552
 553         (make-local-variable 'archive-read-only)
 554         ;; Archives which are inside other archives and whose
 555         ;; names are invalid for this OS, can't be written.
 556         (setq archive-read-only
 557               (or (not (file-writable-p (buffer-file-name)))
 558                   (and archive-subfile-mode
 559                        (string-match file-name-invalid-regexp
 560                                      (aref archive-subfile-mode 0)))))
 561
 562         ;; Should we use a local copy when accessing from outside Emacs?
 563         (make-local-variable 'archive-local-name)
 564
 565         ;; An archive can contain another archive whose name is invalid
 566         ;; on local filesystem.  Treat such archives as remote.
 567         (or archive-remote
 568             (setq archive-remote
 569                   (or (string-match archive-remote-regexp (buffer-file-name))
 570                       (string-match file-name-invalid-regexp
 571                                     (buffer-file-name)))))
 572
 573         (setq major-mode 'archive-mode)
 574         (setq mode-name (concat typename "-Archive"))
 575         ;; Run archive-foo-mode-hook and archive-mode-hook
 576         (run-hooks (archive-name "mode-hook") 'archive-mode-hook)
 577         (use-local-map archive-mode-map))
 578
 579       (make-local-variable 'archive-proper-file-start)
 580       (make-local-variable 'archive-file-list-start)
 581       (make-local-variable 'archive-file-list-end)
 582       (make-local-variable 'archive-file-name-indent)
 583       (setq archive-file-name-coding-system
 584             (or file-name-coding-system
 585                 default-file-name-coding-system
 586                 locale-coding-system))
 587       (if default-enable-multibyte-characters
 588           (set-buffer-multibyte t 'to))
 589       (archive-summarize nil)
 590       (setq buffer-read-only t))))
 591
 592 ;; Archive mode is suitable only for specially formatted data.
 593 (put 'archive-mode 'mode-class 'special)
 594 ;; -------------------------------------------------------------------------
 595 ;; Section: Key maps
 596
 597 (if archive-mode-map nil
 598   (setq archive-mode-map (make-keymap))
 599   (suppress-keymap archive-mode-map)
 600   (define-key archive-mode-map " " 'archive-next-line)
 601   (define-key archive-mode-map "a" 'archive-alternate-display)
 602   ;;(define-key archive-mode-map "c" 'archive-copy)
 603   (define-key archive-mode-map "d" 'archive-flag-deleted)
 604   (define-key archive-mode-map "\C-d" 'archive-flag-deleted)
 605   (define-key archive-mode-map "e" 'archive-extract)
 606   (define-key archive-mode-map "f" 'archive-extract)
 607   (define-key archive-mode-map "\C-m" 'archive-extract)
 608   (define-key archive-mode-map "g" 'revert-buffer)
 609   (define-key archive-mode-map "h" 'describe-mode)
 610   (define-key archive-mode-map "m" 'archive-mark)
 611   (define-key archive-mode-map "n" 'archive-next-line)
 612   (define-key archive-mode-map "\C-n" 'archive-next-line)
 613   (define-key archive-mode-map [down] 'archive-next-line)
 614   (define-key archive-mode-map "o" 'archive-extract-other-window)
 615   (define-key archive-mode-map "p" 'archive-previous-line)
 616   (define-key archive-mode-map "q" 'quit-window)
 617   (define-key archive-mode-map "\C-p" 'archive-previous-line)
 618   (define-key archive-mode-map [up] 'archive-previous-line)
 619   (define-key archive-mode-map "r" 'archive-rename-entry)
 620   (define-key archive-mode-map "u" 'archive-unflag)
 621   (define-key archive-mode-map "\M-\C-?" 'archive-unmark-all-files)
 622   (define-key archive-mode-map "v" 'archive-view)
 623   (define-key archive-mode-map "x" 'archive-expunge)
 624   (define-key archive-mode-map "\177" 'archive-unflag-backwards)
 625   (define-key archive-mode-map "E" 'archive-extract-other-window)
 626   (define-key archive-mode-map "M" 'archive-chmod-entry)
 627   (define-key archive-mode-map "G" 'archive-chgrp-entry)
 628   (define-key archive-mode-map "O" 'archive-chown-entry)
 629
 630   (if archive-lemacs
 631       (progn
 632         ;; Not a nice "solution" but it'll have to do
 633         (define-key archive-mode-map "\C-xu" 'archive-undo)
 634         (define-key archive-mode-map "\C-_" 'archive-undo))
 635     (substitute-key-definition 'undo 'archive-undo
 636                                archive-mode-map global-map))
 637
 638   (define-key archive-mode-map
 639     (if archive-lemacs 'button2 [mouse-2]) 'archive-mouse-extract)
 640
 641   (if archive-lemacs
 642       ()                                ; out of luck
 643
 644     (define-key archive-mode-map [menu-bar immediate]
 645       (cons "Immediate" (make-sparse-keymap "Immediate")))
 646     (define-key archive-mode-map [menu-bar immediate alternate]
 647       '(menu-item "Alternate Display" archive-alternate-display
 648                   :enable (boundp (archive-name "alternate-display"))
 649                   :help "Toggle alternate file info display"))
 650     (define-key archive-mode-map [menu-bar immediate view]
 651       '(menu-item "View This File" archive-view
 652                   :help "Display file at cursor in View Mode"))
 653     (define-key archive-mode-map [menu-bar immediate display]
 654       '(menu-item "Display in Other Window" archive-display-other-window
 655                   :help "Display file at cursor in another window"))
 656     (define-key archive-mode-map [menu-bar immediate find-file-other-window]
 657       '(menu-item "Find in Other Window" archive-extract-other-window
 658                   :help "Edit file at cursor in another window"))
 659     (define-key archive-mode-map [menu-bar immediate find-file]
 660       '(menu-item "Find This File" archive-extract
 661                   :help "Extract file at cursor and edit it"))
 662
 663     (define-key archive-mode-map [menu-bar mark]
 664       (cons "Mark" (make-sparse-keymap "Mark")))
 665     (define-key archive-mode-map [menu-bar mark unmark-all]
 666       '(menu-item "Unmark All" archive-unmark-all-files
 667                   :help "Unmark all marked files"))
 668     (define-key archive-mode-map [menu-bar mark deletion]
 669       '(menu-item "Flag" archive-flag-deleted
 670                   :help "Flag file at cursor for deletion"))
 671     (define-key archive-mode-map [menu-bar mark unmark]
 672       '(menu-item "Unflag" archive-unflag
 673                   :help "Unmark file at cursor"))
 674     (define-key archive-mode-map [menu-bar mark mark]
 675       '(menu-item "Mark" archive-mark
 676                   :help "Mark file at cursor"))
 677
 678     (define-key archive-mode-map [menu-bar operate]
 679       (cons "Operate" (make-sparse-keymap "Operate")))
 680     (define-key archive-mode-map [menu-bar operate chown]
 681       '(menu-item "Change Owner..." archive-chown-entry
 682                   :enable (fboundp (archive-name "chown-entry"))
 683                   :help "Change owner of marked files"))
 684     (define-key archive-mode-map [menu-bar operate chgrp]
 685       '(menu-item "Change Group..." archive-chgrp-entry
 686                   :enable (fboundp (archive-name "chgrp-entry"))
 687                   :help "Change group ownership of marked files"))
 688     (define-key archive-mode-map [menu-bar operate chmod]
 689       '(menu-item "Change Mode..." archive-chmod-entry
 690                   :enable (fboundp (archive-name "chmod-entry"))
 691                   :help "Change mode (permissions) of marked files"))
 692     (define-key archive-mode-map [menu-bar operate rename]
 693       '(menu-item "Rename to..." archive-rename-entry
 694                   :enable (fboundp (archive-name "rename-entry"))
 695                   :help "Rename marked files"))
 696     ;;(define-key archive-mode-map [menu-bar operate copy]
 697     ;;  '(menu-item "Copy to..." archive-copy))
 698     (define-key archive-mode-map [menu-bar operate expunge]
 699       '(menu-item "Expunge Marked Files" archive-expunge
 700                   :help "Delete all flagged files from archive"))
 701   ))
 702
 703 (let* ((item1 '(archive-subfile-mode " Archive"))
 704        (items (list item1)))
 705   (or (member item1 minor-mode-alist)
 706       (setq minor-mode-alist (append items minor-mode-alist))))
 707 ;; -------------------------------------------------------------------------
 708 (defun archive-find-type ()
 709   (widen)
 710   (goto-char (point-min))
 711   ;; The funny [] here make it unlikely that the .elc file will be treated
 712   ;; as an archive by other software.
 713   (let (case-fold-search)
 714     (cond ((looking-at "[P]K\003\004") 'zip)
 715           ((looking-at "..-l[hz][0-9ds]-") 'lzh)
 716           ((looking-at "....................[\334]\247\304\375") 'zoo)
 717           ((and (looking-at "\C-z")     ; signature too simple, IMHO
 718                 (string-match "\\.[aA][rR][cC]$"
 719                               (or buffer-file-name (buffer-name))))
 720            'arc)
 721           (t (error "Buffer format not recognized")))))
 722 ;; -------------------------------------------------------------------------
 723 (defun archive-summarize (&optional shut-up)
 724   "Parse the contents of the archive file in the current buffer.
 725 Place a dired-like listing on the front;
 726 then narrow to it, so that only that listing
 727 is visible (and the real data of the buffer is hidden).
 728 Optional argument SHUT-UP, if non-nil, means don't print messages
 729 when parsing the archive."
 730   (widen)
 731   (let (buffer-read-only)
 732     (or shut-up
 733         (message "Parsing archive file..."))
 734     (buffer-disable-undo (current-buffer))
 735     (setq archive-files (funcall (archive-name "summarize")))
 736     (or shut-up
 737         (message "Parsing archive file...done."))
 738     (setq archive-proper-file-start (point-marker))
 739     (narrow-to-region (point-min) (point))
 740     (set-buffer-modified-p nil)
 741     (buffer-enable-undo))
 742   (goto-char archive-file-list-start)
 743   (archive-next-line 0))
 744
 745 (defun archive-resummarize ()
 746   "Recreate the contents listing of an archive."
 747   (let ((modified (buffer-modified-p))
 748         (no (archive-get-lineno))
 749         buffer-read-only)
 750     (widen)
 751     (delete-region (point-min) archive-proper-file-start)
 752     (archive-summarize t)
 753     (set-buffer-modified-p modified)
 754     (goto-char archive-file-list-start)
 755     (archive-next-line no)))
 756
 757 (defun archive-summarize-files (files)
 758   "Insert a description of a list of files annotated with proper mouse face."
 759   (setq archive-file-list-start (point-marker))
 760   (setq archive-file-name-indent (if files (aref (car files) 1) 0))
 761   ;; We don't want to do an insert for each element since that takes too
 762   ;; long when the archive -- which has to be moved in memory -- is large.
 763   (insert
 764    (apply
 765     (function concat)
 766     (mapcar
 767      (function
 768       (lambda (fil)
 769         ;; Using `concat' here copies the text also, so we can add
 770         ;; properties without problems.
 771         (let ((text (concat (aref fil 0) "\n")))
 772           (if archive-lemacs
 773               ()                        ; out of luck
 774             (add-text-properties
 775              (aref fil 1) (aref fil 2)
 776              '(mouse-face highlight
 777                help-echo "mouse-2: extract this file into a buffer")
 778              text))
 779           text)))
 780      files)))
 781   (setq archive-file-list-end (point-marker)))
 782
 783 (defun archive-alternate-display ()
 784   "Toggle alternative display.
 785 To avoid very long lines some archive mode don't show all information.
 786 This function changes the set of information shown for each files."
 787   (interactive)
 788   (setq archive-alternate-display (not archive-alternate-display))
 789   (archive-resummarize))
 790 ;; -------------------------------------------------------------------------
 791 ;; Section: Local archive copy handling
 792
 793 (defun archive-unique-fname (fname dir)
 794   "Make sure a file FNAME can be created uniquely in directory DIR.
 795
 796 If FNAME can be uniquely created in DIR, it is returned unaltered.
 797 If FNAME is something our underlying filesystem can't grok, or if another
 798 file by that name already exists in DIR, a unique new name is generated
 799 using `make-temp-file', and the generated name is returned."
 800   (let ((fullname (expand-file-name fname dir))
 801         (alien (string-match file-name-invalid-regexp fname)))
 802     (if (or alien (file-exists-p fullname))
 803         (make-temp-file
 804          (expand-file-name
 805           (if (and (fboundp 'msdos-long-file-names)
 806                    (not (msdos-long-file-names)))
 807               "am"
 808             "arc-mode.")
 809           dir))
 810       fullname)))
 811
 812 (defun archive-maybe-copy (archive)
 813   (let ((coding-system-for-write 'no-conversion))
 814     (if archive-remote
 815         (let ((start (point-max))
 816               ;; Sometimes ARCHIVE is invalid while its actual name, as
 817               ;; recorded in its parent archive, is not.  For example, an
 818               ;; archive bar.zip inside another archive foo.zip gets a name
 819               ;; "foo.zip:bar.zip", which is invalid on DOS/Windows.
 820               ;; So use the actual name if available.
 821               (archive-name
 822                (or (and archive-subfile-mode (aref archive-subfile-mode 0))
 823                    archive)))
 824           (make-directory archive-tmpdir t)
 825           (setq archive-local-name
 826                 (archive-unique-fname archive-name archive-tmpdir))
 827           (save-restriction
 828             (widen)
 829             (write-region start (point-max) archive-local-name nil 'nomessage))
 830           archive-local-name)
 831       (if (buffer-modified-p) (save-buffer))
 832       archive)))
 833
 834 (defun archive-maybe-update (unchanged)
 835   (if archive-remote
 836       (let ((name archive-local-name)
 837             (modified (buffer-modified-p))
 838             (coding-system-for-read 'no-conversion)
 839             (lno (archive-get-lineno))
 840             buffer-read-only)
 841         (if unchanged nil
 842           (setq archive-files nil)
 843           (erase-buffer)
 844           (insert-file-contents name)
 845           (archive-mode t)
 846           (goto-char archive-file-list-start)
 847           (archive-next-line lno))
 848         (archive-delete-local name)
 849         (if (not unchanged)
 850             (message
 851              "Buffer `%s' must be saved for changes to take effect"
 852              (buffer-name (current-buffer))))
 853         (set-buffer-modified-p (or modified (not unchanged))))))
 854
 855 (defun archive-delete-local (name)
 856   "Delete file NAME and its parents up to and including `archive-tmpdir'."
 857   (let ((again t)
 858         (top (directory-file-name (file-name-as-directory archive-tmpdir))))
 859     (condition-case nil
 860         (delete-file name)
 861       (error nil))
 862     (while again
 863       (setq name (directory-file-name (file-name-directory name)))
 864       (condition-case nil
 865           (delete-directory name)
 866         (error nil))
 867       (if (string= name top) (setq again nil)))))
 868 ;; -------------------------------------------------------------------------
 869 ;; Section: Member extraction
 870
 871 (defun archive-file-name-handler (op &rest args)
 872   (or (eq op 'file-exists-p)
 873       (let ((file-name-handler-alist nil))
 874         (apply op args))))
 875
 876 (defun archive-set-buffer-as-visiting-file (filename)
 877   "Set the current buffer as if it were visiting FILENAME."
 878   (save-excursion
 879     (goto-char (point-min))
 880     (let ((coding
 881            (or coding-system-for-read
 882                (and set-auto-coding-function
 883                     (save-excursion
 884                       (funcall set-auto-coding-function
 885                                filename (- (point-max) (point-min)))))
 886                ;; dos-w32.el defines find-operation-coding-system for
 887                ;; DOS/Windows systems which preserves the coding-system
 888                ;; of existing files.  We want it to act here as if the
 889                ;; extracted file existed.
 890                (let ((file-name-handler-alist
 891                       '(("" . archive-file-name-handler))))
 892                  (car (find-operation-coding-system 'insert-file-contents
 893                                                     filename t))))))
 894       (if (and (not coding-system-for-read)
 895                (not enable-multibyte-characters))
 896           (setq coding
 897                 (coding-system-change-text-conversion coding 'raw-text)))
 898       (if (and coding
 899                (not (eq coding 'no-conversion)))
 900           (decode-coding-region (point-min) (point-max) coding)
 901         (setq last-coding-system-used coding))
 902       (set-buffer-modified-p nil)
 903       (kill-local-variable 'buffer-file-coding-system)
 904       (after-insert-file-set-buffer-file-coding-system (- (point-max)
 905                                                           (point-min))))))
 906
 907 (defun archive-mouse-extract (event)
 908   "Extract a file whose name you click on."
 909   (interactive "e")
 910   (mouse-set-point event)
 911   (switch-to-buffer
 912    (save-excursion
 913      (archive-extract)
 914      (current-buffer))))
 915
 916 (defun archive-extract (&optional other-window-p)
 917   "In archive mode, extract this entry of the archive into its own buffer."
 918   (interactive)
 919   (let* ((view-p (eq other-window-p 'view))
 920          (descr (archive-get-descr))
 921          (ename (aref descr 0))
 922          (iname (aref descr 1))
 923          (archive-buffer (current-buffer))
 924          (arcdir default-directory)
 925          (archive (buffer-file-name))
 926          (arcname (file-name-nondirectory archive))
 927          (bufname (concat (file-name-nondirectory iname) " (" arcname ")"))
 928          (extractor (archive-name "extract"))
 929          ;; Members with file names which aren't valid for the
 930          ;; underlying filesystem, are treated as read-only.
 931          (read-only-p (or archive-read-only
 932                           view-p
 933                           (string-match file-name-invalid-regexp ename)))
 934          (buffer (get-buffer bufname))
 935          (just-created nil)
 936          (file-name-coding archive-file-name-coding-system))
 937       (if buffer
 938           nil
 939         (setq archive (archive-maybe-copy archive))
 940         (setq buffer (get-buffer-create bufname))
 941         (setq just-created t)
 942         (save-excursion
 943           (set-buffer buffer)
 944           (setq buffer-file-name
 945                 (expand-file-name (concat arcname ":" iname)))
 946           (setq buffer-file-truename
 947                 (abbreviate-file-name buffer-file-name))
 948           ;; Set the default-directory to the dir of the superior buffer.
 949           (setq default-directory arcdir)
 950           (make-local-variable 'archive-superior-buffer)
 951           (setq archive-superior-buffer archive-buffer)
 952           (make-local-variable 'local-write-file-hooks)
 953           (add-hook 'local-write-file-hooks 'archive-write-file-member)
 954           (setq archive-subfile-mode descr)
 955           (setq archive-file-name-coding-system file-name-coding)
 956           (if (and
 957                (null
 958                 (let (;; We may have to encode file name arguement for
 959                       ;; external programs.
 960                       (coding-system-for-write
 961                        (and enable-multibyte-characters
 962                             archive-file-name-coding-system))
 963                       ;; We read an archive member by no-conversion at
 964                       ;; first, then decode appropriately by calling
 965                       ;; archive-set-buffer-as-visiting-file later.
 966                       (coding-system-for-read 'no-conversion))
 967                   (condition-case err
 968                       (if (fboundp extractor)
 969                           (funcall extractor archive ename)
 970                         (archive-*-extract archive ename
 971                                            (symbol-value extractor)))
 972                     (error
 973                      (ding (message "%s" (error-message-string err)))
 974                      nil))))
 975                just-created)
 976               (progn
 977                 (set-buffer-modified-p nil)
 978                 (kill-buffer buffer))
 979             (archive-set-buffer-as-visiting-file ename)
 980             (goto-char (point-min))
 981             (rename-buffer bufname)
 982             (setq buffer-read-only read-only-p)
 983             (setq buffer-undo-list nil)
 984             (set-buffer-modified-p nil)
 985             (setq buffer-saved-size (buffer-size))
 986             (normal-mode)
 987             ;; Just in case an archive occurs inside another archive.
 988             (if (eq major-mode 'archive-mode)
 989                 (progn
 990                   (setq archive-remote t)
 991                   (if read-only-p (setq archive-read-only t))
 992                   ;; We will write out the archive ourselves if it is
 993                   ;; part of another archive.
 994                   (remove-hook 'write-contents-hooks 'archive-write-file t)))
 995             (run-hooks 'archive-extract-hooks)
 996             (if archive-read-only
 997                 (message "Note: altering this archive is not implemented."))))
 998         (archive-maybe-update t))
 999       (or (not (buffer-name buffer))
1000           (progn
1001             (if view-p
1002                 (view-buffer buffer (and just-created 'kill-buffer))
1003               (if (eq other-window-p 'display)
1004                   (display-buffer buffer)
1005                 (if other-window-p
1006                     (switch-to-buffer-other-window buffer)
1007                   (switch-to-buffer buffer))))))))
1008
1009 (defun archive-*-extract (archive name command)
1010   (let* ((default-directory (file-name-as-directory archive-tmpdir))
1011          (tmpfile (expand-file-name (file-name-nondirectory name)
1012                                     default-directory))
1013          exit-status success)
1014     (make-directory (directory-file-name default-directory) t)
1015     (setq exit-status
1016           (apply 'call-process
1017                  (car command)
1018                  nil
1019                  nil
1020                  nil
1021                  (append (cdr command) (list archive name))))
1022     (cond ((and (numberp exit-status) (= exit-status 0))
1023            (if (not (file-exists-p tmpfile))
1024                (ding (message "`%s': no such file or directory" tmpfile))
1025              (insert-file-contents tmpfile)
1026              (setq success t)))
1027           ((numberp exit-status)
1028            (ding
1029             (message "`%s' exited with status %d" (car command) exit-status)))
1030           ((stringp exit-status)
1031            (ding (message "`%s' aborted: %s" (car command) exit-status)))
1032           (t
1033            (ding (message "`%s' failed" (car command)))))
1034     (archive-delete-local tmpfile)
1035     success))
1036
1037 (defun archive-extract-by-stdout (archive name command)
1038   (apply 'call-process
1039          (car command)
1040          nil
1041          t
1042          nil
1043          (append (cdr command) (list archive name))))
1044
1045 (defun archive-extract-other-window ()
1046   "In archive mode, find this member in another window."
1047   (interactive)
1048   (archive-extract t))
1049
1050 (defun archive-display-other-window ()
1051   "In archive mode, display this member in another window."
1052   (interactive)
1053   (archive-extract 'display))
1054
1055 (defun archive-view ()
1056   "In archive mode, view the member on this line."
1057   (interactive)
1058   (archive-extract 'view))
1059
1060 (defun archive-add-new-member (arcbuf name)
1061   "Add current buffer to the archive in ARCBUF naming it NAME."
1062   (interactive
1063    (list (get-buffer
1064           (read-buffer "Buffer containing archive: "
1065                        ;; Find first archive buffer and suggest that
1066                        (let ((bufs (buffer-list)))
1067                          (while (and bufs (not (eq (save-excursion
1068                                                      (set-buffer (car bufs))
1069                                                      major-mode)
1070                                                    'archive-mode)))
1071                            (setq bufs (cdr bufs)))
1072                          (if bufs
1073                              (car bufs)
1074                            (error "There are no archive buffers")))
1075                        t))
1076          (read-string "File name in archive: "
1077                       (if buffer-file-name
1078                           (file-name-nondirectory buffer-file-name)
1079                         ""))))
1080   (save-excursion
1081     (set-buffer arcbuf)
1082     (or (eq major-mode 'archive-mode)
1083         (error "Buffer is not an archive buffer"))
1084     (if archive-read-only
1085         (error "Archive is read-only")))
1086   (if (eq arcbuf (current-buffer))
1087       (error "An archive buffer cannot be added to itself"))
1088   (if (string= name "")
1089       (error "Archive members may not be given empty names"))
1090   (let ((func (save-excursion (set-buffer arcbuf)
1091                               (archive-name "add-new-member")))
1092         (membuf (current-buffer)))
1093     (if (fboundp func)
1094         (save-excursion
1095           (set-buffer arcbuf)
1096           (funcall func buffer-file-name membuf name))
1097       (error "Adding a new member is not supported for this archive type"))))
1098 ;; -------------------------------------------------------------------------
1099 ;; Section: IO stuff
1100
1101 (defun archive-write-file-member ()
1102   (save-excursion
1103     (save-restriction
1104       (message "Updating archive...")
1105       (widen)
1106       (let ((writer  (save-excursion (set-buffer archive-superior-buffer)
1107                                      (archive-name "write-file-member")))
1108             (archive (save-excursion (set-buffer archive-superior-buffer)
1109                                      (archive-maybe-copy (buffer-file-name)))))
1110         (if (fboundp writer)
1111             (funcall writer archive archive-subfile-mode)
1112           (archive-*-write-file-member archive
1113                                        archive-subfile-mode
1114                                        (symbol-value writer)))
1115         (set-buffer-modified-p nil)
1116         (message "Updating archive...done"))
1117       (set-buffer archive-superior-buffer)
1118       (if (not archive-remote) (revert-buffer) (archive-maybe-update nil))))
1119   ;; Restore the value of last-coding-system-used, so that basic-save-buffer
1120   ;; won't reset the coding-system of this archive member.
1121   (if (local-variable-p 'archive-member-coding-system)
1122       (setq last-coding-system-used archive-member-coding-system))
1123   t)
1124
1125 (defun archive-*-write-file-member (archive descr command)
1126   (let* ((ename (aref descr 0))
1127          (tmpfile (expand-file-name ename archive-tmpdir))
1128          (top (directory-file-name (file-name-as-directory archive-tmpdir)))
1129          (default-directory (file-name-as-directory top)))
1130     (unwind-protect
1131         (progn
1132           (make-directory (file-name-directory tmpfile) t)
1133           ;; If the member is itself an archive, write it without
1134           ;; the dired-like listing we created.
1135           (if (eq major-mode 'archive-mode)
1136               (archive-write-file tmpfile)
1137             (write-region (point-min) (point-max) tmpfile nil 'nomessage))
1138           ;; basic-save-buffer needs last-coding-system-used to have
1139           ;; the value used to write the file, so save it before any
1140           ;; further processing clobbers it (we restore it in
1141           ;; archive-write-file-member, above).
1142           (setq archive-member-coding-system last-coding-system-used)
1143           (if (aref descr 3)
1144               ;; Set the file modes, but make sure we can read it.
1145               (set-file-modes tmpfile (logior ?\400 (aref descr 3))))
1146           (setq ename
1147                 (encode-coding-string ename archive-file-name-coding-system))
1148           (let* ((coding-system-for-write 'no-conversion)
1149                  (exitcode (apply 'call-process
1150                                   (car command)
1151                                   nil
1152                                   nil
1153                                   nil
1154                                   (append (cdr command)
1155                                           (list archive ename)))))
1156             (if (equal exitcode 0)
1157                 nil
1158               (error "Updating was unsuccessful (%S)" exitcode))))
1159       (archive-delete-local tmpfile))))
1160
1161 (defun archive-write-file (&optional file)
1162   (save-excursion
1163     (let ((coding-system-for-write 'no-conversion))
1164       (write-region archive-proper-file-start (point-max)
1165                     (or file buffer-file-name) nil t)
1166       (set-buffer-modified-p nil))
1167     t))
1168 ;; -------------------------------------------------------------------------
1169 ;; Section: Marking and unmarking.
1170
1171 (defun archive-flag-deleted (p &optional type)
1172   "In archive mode, mark this member to be deleted from the archive.
1173 With a prefix argument, mark that many files."
1174   (interactive "p")
1175   (or type (setq type ?D))
1176   (beginning-of-line)
1177   (let ((sign (if (>= p 0) +1 -1))
1178         (modified (buffer-modified-p))
1179         buffer-read-only)
1180     (while (not (zerop p))
1181       (if (archive-get-descr t)
1182           (progn
1183             (delete-char 1)
1184             (insert type)))
1185       (forward-line sign)
1186       (setq p (- p sign)))
1187     (set-buffer-modified-p modified))
1188   (archive-next-line 0))
1189
1190 (defun archive-unflag (p)
1191   "In archive mode, un-mark this member if it is marked to be deleted.
1192 With a prefix argument, un-mark that many files forward."
1193   (interactive "p")
1194   (archive-flag-deleted p ? ))
1195
1196 (defun archive-unflag-backwards (p)
1197   "In archive mode, un-mark this member if it is marked to be deleted.
1198 With a prefix argument, un-mark that many members backward."
1199   (interactive "p")
1200   (archive-flag-deleted (- p) ? ))
1201
1202 (defun archive-unmark-all-files ()
1203   "Remove all marks."
1204   (interactive)
1205   (let ((modified (buffer-modified-p))
1206         buffer-read-only)
1207     (save-excursion
1208       (goto-char archive-file-list-start)
1209       (while (< (point) archive-file-list-end)
1210         (or (= (following-char) ? )
1211             (progn (delete-char 1) (insert ? )))
1212         (forward-line 1)))
1213     (set-buffer-modified-p modified)))
1214
1215 (defun archive-mark (p)
1216   "In archive mode, mark this member for group operations.
1217 With a prefix argument, mark that many members.
1218 Use \\[archive-unmark-all-files] to remove all marks."
1219   (interactive "p")
1220   (archive-flag-deleted p ?*))
1221
1222 (defun archive-get-marked (mark &optional default)
1223   (let (files)
1224     (save-excursion
1225       (goto-char archive-file-list-start)
1226       (while (< (point) archive-file-list-end)
1227         (if (= (following-char) mark)
1228             (setq files (cons (archive-get-descr) files)))
1229         (forward-line 1)))
1230     (or (nreverse files)
1231         (and default
1232              (list (archive-get-descr))))))
1233 ;; -------------------------------------------------------------------------
1234 ;; Section: Operate
1235
1236 (defun archive-next-line (p)
1237   (interactive "p")
1238   (forward-line p)
1239   (or (eobp)
1240       (forward-char archive-file-name-indent)))
1241
1242 (defun archive-previous-line (p)
1243   (interactive "p")
1244   (archive-next-line (- p)))
1245
1246 (defun archive-chmod-entry (new-mode)
1247   "Change the protection bits associated with all marked or this member.
1248 The new protection bits can either be specified as an octal number or
1249 as a relative change like \"g+rw\" as for chmod(2)"
1250   (interactive "sNew mode (octal or relative): ")
1251   (if archive-read-only (error "Archive is read-only"))
1252   (let ((func (archive-name "chmod-entry")))
1253     (if (fboundp func)
1254         (progn
1255           (funcall func new-mode (archive-get-marked ?* t))
1256           (archive-resummarize))
1257       (error "Setting mode bits is not supported for this archive type"))))
1258
1259 (defun archive-chown-entry (new-uid)
1260   "Change the owner of all marked or this member."
1261   (interactive "nNew uid: ")
1262   (if archive-read-only (error "Archive is read-only"))
1263   (let ((func (archive-name "chown-entry")))
1264     (if (fboundp func)
1265         (progn
1266           (funcall func new-uid (archive-get-marked ?* t))
1267           (archive-resummarize))
1268       (error "Setting owner is not supported for this archive type"))))
1269
1270 (defun archive-chgrp-entry (new-gid)
1271   "Change the group of all marked or this member."
1272   (interactive "nNew gid: ")
1273   (if archive-read-only (error "Archive is read-only"))
1274   (let ((func (archive-name "chgrp-entry")))
1275     (if (fboundp func)
1276         (progn
1277           (funcall func new-gid (archive-get-marked ?* t))
1278           (archive-resummarize))
1279       (error "Setting group is not supported for this archive type"))))
1280
1281 (defun archive-expunge ()
1282   "Do the flagged deletions."
1283   (interactive)
1284   (let (files)
1285     (save-excursion
1286       (goto-char archive-file-list-start)
1287       (while (< (point) archive-file-list-end)
1288         (if (= (following-char) ?D)
1289             (setq files (cons (aref (archive-get-descr) 0) files)))
1290         (forward-line 1)))
1291     (setq files (nreverse files))
1292     (and files
1293          (or (not archive-read-only)
1294              (error "Archive is read-only"))
1295          (or (yes-or-no-p (format "Really delete %d member%s? "
1296                                   (length files)
1297                                   (if (null (cdr files)) "" "s")))
1298              (error "Operation aborted"))
1299          (let ((archive (archive-maybe-copy (buffer-file-name)))
1300                (expunger (archive-name "expunge")))
1301            (if (fboundp expunger)
1302                (funcall expunger archive files)
1303              (archive-*-expunge archive files (symbol-value expunger)))
1304            (archive-maybe-update nil)
1305            (if archive-remote
1306                (archive-resummarize)
1307              (revert-buffer))))))
1308
1309 (defun archive-*-expunge (archive files command)
1310   (apply 'call-process
1311          (car command)
1312          nil
1313          nil
1314          nil
1315          (append (cdr command) (cons archive files))))
1316
1317 (defun archive-rename-entry (newname)
1318   "Change the name associated with this entry in the tar file."
1319   (interactive "sNew name: ")
1320   (if archive-read-only (error "Archive is read-only"))
1321   (if (string= newname "")
1322       (error "Archive members may not be given empty names"))
1323   (let ((func (archive-name "rename-entry"))
1324         (descr (archive-get-descr)))
1325     (if (fboundp func)
1326         (progn
1327           (funcall func (buffer-file-name)
1328                    (encode-coding-string newname
1329                                          archive-file-name-coding-system)
1330                    descr)
1331           (archive-resummarize))
1332       (error "Renaming is not supported for this archive type"))))
1333
1334 ;; Revert the buffer and recompute the dired-like listing.
1335 (defun archive-mode-revert (&optional no-auto-save no-confirm)
1336   (let ((no (archive-get-lineno)))
1337     (setq archive-files nil)
1338     (let ((revert-buffer-function nil)
1339           (coding-system-for-read 'no-conversion))
1340       (revert-buffer t t))
1341     (archive-mode)
1342     (goto-char archive-file-list-start)
1343     (archive-next-line no)))
1344
1345 (defun archive-undo ()
1346   "Undo in an archive buffer.
1347 This doesn't recover lost files, it just undoes changes in the buffer itself."
1348   (interactive)
1349   (let (buffer-read-only)
1350     (undo)))
1351 ;; -------------------------------------------------------------------------
1352 ;; Section: Arc Archives
1353
1354 (defun archive-arc-summarize ()
1355   (let ((p 1)
1356         (totalsize 0)
1357         (maxlen 8)
1358         files
1359         visual)
1360     (while (and (< (+ p 29) (point-max))
1361                 (= (byte-after p) ?\C-z)
1362                 (> (byte-after (1+ p)) 0))
1363       (let* ((namefld (buffer-substring (+ p 2) (+ p 2 13)))
1364              (fnlen   (or (string-match "\0" namefld) 13))
1365              (efnname (decode-coding-string (substring namefld 0 fnlen)
1366                                             archive-file-name-coding-system))
1367              (csize   (archive-l-e (+ p 15) 4))
1368              (moddate (archive-l-e (+ p 19) 2))
1369              (modtime (archive-l-e (+ p 21) 2))
1370              (ucsize  (archive-l-e (+ p 25) 4))
1371              (fiddle  (string= efnname (upcase efnname)))
1372              (ifnname (if fiddle (downcase efnname) efnname))
1373              (text    (format "  %8d  %-11s  %-8s  %s"
1374                               ucsize
1375                               (archive-dosdate moddate)
1376                               (archive-dostime modtime)
1377                               ifnname)))
1378         (setq maxlen (max maxlen fnlen)
1379               totalsize (+ totalsize ucsize)
1380               visual (cons (vector text
1381                                    (- (length text) (length ifnname))
1382                                    (length text))
1383                            visual)
1384               files (cons (vector efnname ifnname fiddle nil (1- p))
1385                           files)
1386               p (+ p 29 csize))))
1387     (goto-char (point-min))
1388     (let ((dash (concat "- --------  -----------  --------  "
1389                         (make-string maxlen ?-)
1390                         "\n")))
1391       (insert "M   Length  Date         Time      File\n"
1392               dash)
1393       (archive-summarize-files (nreverse visual))
1394       (insert dash
1395               (format "  %8d                         %d file%s"
1396                       totalsize
1397                       (length files)
1398                       (if (= 1 (length files)) "" "s"))
1399               "\n"))
1400     (apply 'vector (nreverse files))))
1401
1402 (defun archive-arc-rename-entry (archive newname descr)
1403   (if (string-match "[:\\\\/]" newname)
1404       (error "File names in arc files may not contain a path"))
1405   (if (> (length newname) 12)
1406       (error "File names in arc files are limited to 12 characters"))
1407   (let ((name (concat newname (substring "\0\0\0\0\0\0\0\0\0\0\0\0\0"
1408                                          (length newname))))
1409         buffer-read-only)
1410     (save-restriction
1411       (save-excursion
1412         (widen)
1413         (goto-char (+ archive-proper-file-start (aref descr 4) 2))
1414         (delete-char 13)
1415         (insert-unibyte name)))))
1416 ;; -------------------------------------------------------------------------
1417 ;; Section: Lzh Archives
1418
1419 (defun archive-lzh-summarize ()
1420   (let ((p 1)
1421         (totalsize 0)
1422         (maxlen 8)
1423         files
1424         visual)
1425     (while (progn (goto-char p)
1426                   (looking-at "\\(.\\|\n\\)\\(.\\|\n\\)-l[hz][0-9ds]-"))
1427       (let* ((hsize   (byte-after p))
1428              (csize   (archive-l-e (+ p 7) 4))
1429              (ucsize  (archive-l-e (+ p 11) 4))
1430              (modtime (archive-l-e (+ p 15) 2))
1431              (moddate (archive-l-e (+ p 17) 2))
1432              (hdrlvl  (byte-after (+ p 20)))
1433              (fnlen   (byte-after (+ p 21)))
1434              (efnname (let ((str (buffer-substring (+ p 22) (+ p 22 fnlen))))
1435                         (decode-coding-string
1436                          str archive-file-name-coding-system)))
1437              (fiddle  (string= efnname (upcase efnname)))
1438              (ifnname (if fiddle (downcase efnname) efnname))
1439              (width (string-width ifnname))
1440              (p2      (+ p 22 fnlen))
1441              (creator (if (>= (- hsize fnlen) 24) (byte-after (+ p2 2)) 0))
1442              mode modestr uid gid text path prname
1443              )
1444         (if (= hdrlvl 0)
1445             (setq mode    (if (= creator ?U) (archive-l-e (+ p2 8) 2) ?\666)
1446                   uid     (if (= creator ?U) (archive-l-e (+ p2 10) 2))
1447                   gid     (if (= creator ?U) (archive-l-e (+ p2 12) 2)))
1448           (if (= creator ?U)
1449               (let* ((p3 (+ p2 3))
1450                      (hsize (archive-l-e p3 2))
1451                      (etype (byte-after (+ p3 2))))
1452                 (while (not (= hsize 0))
1453                   (cond
1454                    ((= etype 2) (let ((i (+ p3 3)))
1455                                   (while (< i (+ p3 hsize))
1456                                     (setq path (concat path
1457                                                        (if (= (byte-after i)
1458                                                               255)
1459                                                            "/"
1460                                                          (char-to-string
1461                                                           (byte-after i)))))
1462                                     (setq i (1+ i)))))
1463                    ((= etype 80) (setq mode (archive-l-e (+ p3 3) 2)))
1464                    ((= etype 81) (progn (setq uid (archive-l-e (+ p3 3) 2))
1465                                         (setq gid (archive-l-e (+ p3 5) 2))))
1466                    )
1467                   (setq p3 (+ p3 hsize))
1468                   (setq hsize (archive-l-e p3 2))
1469                   (setq etype (byte-after (+ p3 2)))))))
1470         (setq prname (if path (concat path ifnname) ifnname))
1471         (setq modestr (if mode (archive-int-to-mode mode) "??????????"))
1472         (setq text    (if archive-alternate-display
1473                           (format "  %8d  %5S  %5S  %s"
1474                                   ucsize
1475                                   (or uid "?")
1476                                   (or gid "?")
1477                                   ifnname)
1478                         (format "  %10s  %8d  %-11s  %-8s  %s"
1479                                 modestr
1480                                 ucsize
1481                                 (archive-dosdate moddate)
1482                                 (archive-dostime modtime)
1483                                 ifnname)))
1484         (setq maxlen (max maxlen width)
1485               totalsize (+ totalsize ucsize)
1486               visual (cons (vector text
1487                                    (- (length text) (length ifnname))
1488                                    (length text))
1489                            visual)
1490               files (cons (vector prname ifnname fiddle mode (1- p))
1491                           files)
1492               p (+ p hsize 2 csize))))
1493     (goto-char (point-min))
1494     (let ((dash (concat (if archive-alternate-display
1495                             "- --------  -----  -----  "
1496                           "- ----------  --------  -----------  --------  ")
1497                         (make-string maxlen ?-)
1498                         "\n"))
1499           (header (if archive-alternate-display
1500                        "M   Length    Uid    Gid  File\n"
1501                     "M   Filemode    Length  Date         Time      File\n"))
1502           (sumline (if archive-alternate-display
1503                        "  %8d                %d file%s"
1504                      "              %8d                         %d file%s")))
1505       (insert header dash)
1506       (archive-summarize-files (nreverse visual))
1507       (insert dash
1508               (format sumline
1509                       totalsize
1510                       (length files)
1511                       (if (= 1 (length files)) "" "s"))
1512               "\n"))
1513     (apply 'vector (nreverse files))))
1514
1515 (defconst archive-lzh-alternate-display t)
1516
1517 (defun archive-lzh-extract (archive name)
1518   (archive-extract-by-stdout archive name archive-lzh-extract))
1519
1520 (defun archive-lzh-resum (p count)
1521   (let ((sum 0))
1522     (while (> count 0)
1523       (setq count (1- count)
1524             sum (+ sum (byte-after p))
1525             p (1+ p)))
1526     (logand sum 255)))
1527
1528 (defun archive-lzh-rename-entry (archive newname descr)
1529   (save-restriction
1530     (save-excursion
1531       (widen)
1532       (let* ((p        (+ archive-proper-file-start (aref descr 4)))
1533              (oldhsize (byte-after p))
1534              (oldfnlen (byte-after (+ p 21)))
1535              (newfnlen (length newname))
1536              (newhsize (+ oldhsize newfnlen (- oldfnlen)))
1537              buffer-read-only)
1538         (if (> newhsize 255)
1539             (error "The file name is too long"))
1540         (goto-char (+ p 21))
1541         (delete-char (1+ oldfnlen))
1542         (insert-unibyte newfnlen newname)
1543         (goto-char p)
1544         (delete-char 2)
1545         (insert-unibyte newhsize (archive-lzh-resum p newhsize))))))
1546
1547 (defun archive-lzh-ogm (newval files errtxt ofs)
1548   (save-restriction
1549     (save-excursion
1550       (widen)
1551       (while files
1552         (let* ((fil (car files))
1553                (p (+ archive-proper-file-start (aref fil 4)))
1554                (hsize   (byte-after p))
1555                (fnlen   (byte-after (+ p 21)))
1556                (p2      (+ p 22 fnlen))
1557                (creator (if (>= (- hsize fnlen) 24) (byte-after (+ p2 2)) 0))
1558                buffer-read-only)
1559           (if (= creator ?U)
1560               (progn
1561                 (or (numberp newval)
1562                     (setq newval (funcall newval (archive-l-e (+ p2 ofs) 2))))
1563                 (goto-char (+ p2 ofs))
1564                 (delete-char 2)
1565                 (insert-unibyte (logand newval 255) (lsh newval -8))
1566                 (goto-char (1+ p))
1567                 (delete-char 1)
1568                 (insert-unibyte (archive-lzh-resum (1+ p) hsize)))
1569             (message "Member %s does not have %s field"
1570                      (aref fil 1) errtxt)))
1571         (setq files (cdr files))))))
1572
1573 (defun archive-lzh-chown-entry (newuid files)
1574   (archive-lzh-ogm newuid files "an uid" 10))
1575
1576 (defun archive-lzh-chgrp-entry (newgid files)
1577   (archive-lzh-ogm newgid files "a gid" 12))
1578
1579 (defun archive-lzh-chmod-entry (newmode files)
1580   (archive-lzh-ogm
1581    ;; This should work even though newmode will be dynamically accessed.
1582    (function (lambda (old) (archive-calc-mode old newmode t)))
1583    files "a unix-style mode" 8))
1584 ;; -------------------------------------------------------------------------
1585 ;; Section: Zip Archives
1586
1587 (defun archive-zip-summarize ()
1588   (goto-char (- (point-max) (- 22 18)))
1589   (search-backward-regexp "[P]K\005\006")
1590   (let ((p (1+ (archive-l-e (+ (point) 16) 4)))
1591         (maxlen 8)
1592         (totalsize 0)
1593         files
1594         visual)
1595     (while (string= "PK\001\002" (buffer-substring p (+ p 4)))
1596       (let* ((creator (byte-after (+ p 5)))
1597              (method  (archive-l-e (+ p 10) 2))
1598              (modtime (archive-l-e (+ p 12) 2))
1599              (moddate (archive-l-e (+ p 14) 2))
1600              (ucsize  (archive-l-e (+ p 24) 4))
1601              (fnlen   (archive-l-e (+ p 28) 2))
1602              (exlen   (archive-l-e (+ p 30) 2))
1603              (fclen   (archive-l-e (+ p 32) 2))
1604              (lheader (archive-l-e (+ p 42) 4))
1605              (efnname (let ((str (buffer-substring (+ p 46) (+ p 46 fnlen))))
1606                         (decode-coding-string
1607                          str archive-file-name-coding-system)))
1608              (isdir   (and (= ucsize 0)
1609                            (string= (file-name-nondirectory efnname) "")))
1610              (mode    (cond ((memq creator '(2 3)) ; Unix + VMS
1611                              (archive-l-e (+ p 40) 2))
1612                             ((memq creator '(0 5 6 7 10 11 15)) ; Dos etc.
1613                              (logior ?\444
1614                                      (if isdir (logior 16384 ?\111) 0)
1615                                      (if (zerop
1616                                           (logand 1 (byte-after (+ p 38))))
1617                                          ?\222 0)))
1618                             (t nil)))
1619              (modestr (if mode (archive-int-to-mode mode) "??????????"))
1620              (fiddle  (and archive-zip-case-fiddle
1621                            (not (not (memq creator '(0 2 4 5 9))))
1622                            (string= (upcase efnname) efnname)))
1623              (ifnname (if fiddle (downcase efnname) efnname))
1624              (width (string-width ifnname))
1625              (text    (format "  %10s  %8d  %-11s  %-8s  %s"
1626                               modestr
1627                               ucsize
1628                               (archive-dosdate moddate)
1629                               (archive-dostime modtime)
1630                               ifnname)))
1631         (setq maxlen (max maxlen width)
1632               totalsize (+ totalsize ucsize)
1633               visual (cons (vector text
1634                                    (- (length text) (length ifnname))
1635                                    (length text))
1636                            visual)
1637               files (cons (if isdir
1638                               nil
1639                             (vector efnname ifnname fiddle mode
1640                                     (list (1- p) lheader)))
1641                           files)
1642               p (+ p 46 fnlen exlen fclen))))
1643     (goto-char (point-min))
1644     (let ((dash (concat "- ----------  --------  -----------  --------  "
1645                         (make-string maxlen ?-)
1646                         "\n")))
1647       (insert "M Filemode      Length  Date         Time      File\n"
1648               dash)
1649       (archive-summarize-files (nreverse visual))
1650       (insert dash
1651               (format "              %8d                         %d file%s"
1652                       totalsize
1653                       (length files)
1654                       (if (= 1 (length files)) "" "s"))
1655               "\n"))
1656     (apply 'vector (nreverse files))))
1657
1658 (defun archive-zip-extract (archive name)
1659   (if archive-zip-use-pkzip
1660       (archive-*-extract archive name archive-zip-extract)
1661     (archive-extract-by-stdout archive name archive-zip-extract)))
1662
1663 (defun archive-zip-write-file-member (archive descr)
1664   (archive-*-write-file-member
1665    archive
1666    descr
1667    (if (aref descr 2) archive-zip-update-case archive-zip-update)))
1668
1669 (defun archive-zip-chmod-entry (newmode files)
1670   (save-restriction
1671     (save-excursion
1672       (widen)
1673       (while files
1674         (let* ((fil (car files))
1675                (p (+ archive-proper-file-start (car (aref fil 4))))
1676                (creator (byte-after (+ p 5)))
1677                (oldmode (aref fil 3))
1678                (newval  (archive-calc-mode oldmode newmode t))
1679                buffer-read-only)
1680           (cond ((memq creator '(2 3)) ; Unix + VMS
1681                  (goto-char (+ p 40))
1682                  (delete-char 2)
1683                  (insert-unibyte (logand newval 255) (lsh newval -8)))
1684                 ((memq creator '(0 5 6 7 10 11 15)) ; Dos etc.
1685                  (goto-char (+ p 38))
1686                  (insert-unibyte (logior (logand (byte-after (point)) 254)
1687                                          (logand (logxor 1 (lsh newval -7)) 1)))
1688                  (delete-char 1))
1689                 (t (message "Don't know how to change mode for this member"))))
1690         (setq files (cdr files))))))
1691 ;; -------------------------------------------------------------------------
1692 ;; Section: Zoo Archives
1693
1694 (defun archive-zoo-summarize ()
1695   (let ((p (1+ (archive-l-e 25 4)))
1696         (maxlen 8)
1697         (totalsize 0)
1698         files
1699         visual)
1700     (while (and (string= "\334\247\304\375" (buffer-substring p (+ p 4)))
1701                 (> (archive-l-e (+ p 6) 4) 0))
1702       (let* ((next    (1+ (archive-l-e (+ p 6) 4)))
1703              (moddate (archive-l-e (+ p 14) 2))
1704              (modtime (archive-l-e (+ p 16) 2))
1705              (ucsize  (archive-l-e (+ p 20) 4))
1706              (namefld (buffer-substring (+ p 38) (+ p 38 13)))
1707              (dirtype (byte-after (+ p 4)))
1708              (lfnlen  (if (= dirtype 2) (byte-after (+ p 56)) 0))
1709              (ldirlen (if (= dirtype 2) (byte-after (+ p 57)) 0))
1710              (fnlen   (or (string-match "\0" namefld) 13))
1711              (efnname (let ((str
1712                              (concat
1713                               (if (> ldirlen 0)
1714                                   (concat (buffer-substring
1715                                            (+ p 58 lfnlen)
1716                                            (+ p 58 lfnlen ldirlen -1))
1717                                           "/")
1718                                 "")
1719                               (if (> lfnlen 0)
1720                                   (buffer-substring (+ p 58)
1721                                                     (+ p 58 lfnlen -1))
1722                                 (substring namefld 0 fnlen)))))
1723                         (decode-coding-string
1724                          str archive-file-name-coding-system)))
1725              (fiddle  (and (= lfnlen 0) (string= efnname (upcase efnname))))
1726              (ifnname (if fiddle (downcase efnname) efnname))
1727              (width (string-width ifnname))
1728              (text    (format "  %8d  %-11s  %-8s  %s"
1729                               ucsize
1730                               (archive-dosdate moddate)
1731                               (archive-dostime modtime)
1732                               ifnname)))
1733         (setq maxlen (max maxlen width)
1734               totalsize (+ totalsize ucsize)
1735               visual (cons (vector text
1736                                    (- (length text) (length ifnname))
1737                                    (length text))
1738                            visual)
1739               files (cons (vector efnname ifnname fiddle nil (1- p))
1740                           files)
1741               p next)))
1742     (goto-char (point-min))
1743     (let ((dash (concat "- --------  -----------  --------  "
1744                         (make-string maxlen ?-)
1745                         "\n")))
1746       (insert "M   Length  Date         Time      File\n"
1747               dash)
1748       (archive-summarize-files (nreverse visual))
1749       (insert dash
1750               (format "  %8d                         %d file%s"
1751                       totalsize
1752                       (length files)
1753                       (if (= 1 (length files)) "" "s"))
1754               "\n"))
1755     (apply 'vector (nreverse files))))
1756
1757 (defun archive-zoo-extract (archive name)
1758   (archive-extract-by-stdout archive name archive-zoo-extract))
1759 ;; -------------------------------------------------------------------------
1760 ;; This line was a mistake; it is kept now for compatibility.
1761 ;; rms  15 Oct 98
1762 (provide 'archive-mode)
1763
1764 (provide 'arc-mode)
1765
1766 ;;; arc-mode.el ends here