lisp/arc-mode.el

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