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

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