lisp/arc-mode.el

   1 ;;; arc-mode.el --- simple editing of archives
   2
   3 ;; Copyright (C) 1995 Free Software Foundation, Inc.
   4
   5 ;; Author: Morten Welinder <terra@diku.dk>
   6 ;; Keywords: archives msdog editing major-mode
   7 ;; Favourite-brand-of-beer: None, I hate beer.
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 2, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24 ;; Boston, MA 02111-1307, USA.
  25
  26 ;;; Commentary:
  27
  28 ;; NAMING: "arc" is short for "archive" and does not refer specifically
  29 ;; to files whose name end in ".arc"
  30 ;;
  31 ;; This code does not decode any files internally, although it does
  32 ;; understand the directory level of the archives.  For this reason,
  33 ;; you should expect this code to need more fiddling than tar-mode.el
  34 ;; (although it at present has fewer bugs :-)  In particular, I have
  35 ;; not tested this under Ms-Dog myself.
  36 ;; -------------------------------------
  37 ;; INTERACTION: arc-mode.el should play together with
  38 ;;
  39 ;; * ange-ftp.el: Remote archives (i.e., ones that ange-ftp has brought
  40 ;;                to you) are handled by doing all updates on a local
  41 ;;                copy.  When you make changes to a remote file the
  42 ;;                changes will first take effect when the archive buffer
  43 ;;                is saved.  You will be warned about this.
  44 ;;
  45 ;; * dos-fns.el:  (Part of Emacs 19).  You get automatic ^M^J <--> ^J
  46 ;;                conversion.
  47 ;;
  48 ;; arc-mode.el does not work well with crypt++.el; for the archives as
  49 ;; such this could be fixed (but wouldn't be useful) by declaring such
  50 ;; archives to be "remote".  For the members this is a general Emacs
  51 ;; problem that 19.29's file formats may fix.
  52 ;; -------------------------------------
  53 ;; ARCHIVE TYPES: Currently only the archives below are handled, but the
  54 ;; structure for handling just about anything is in place.
  55 ;;
  56 ;;                        Arc     Lzh     Zip     Zoo
  57 ;;                        --------------------------------
  58 ;; View listing           Intern  Intern  Intern  Intern
  59 ;; Extract member         Y       Y       Y       Y
  60 ;; Save changed member    Y       Y       Y       Y
  61 ;; Add new member         N       N       N       N
  62 ;; Delete member          Y       Y       Y       Y
  63 ;; Rename member          Y       Y       N       N
  64 ;; Chmod                  -       Y       Y       -
  65 ;; Chown                  -       Y       -       -
  66 ;; Chgrp                  -       Y       -       -
  67 ;;
  68 ;; Special thanks to Bill Brodie <wbrodie@panix.com> for very useful tips
  69 ;; on the first released version of this package.
  70 ;;
  71 ;; This code is partly based on tar-mode.el from Emacs.
  72 ;; -------------------------------------
  73 ;; ARCHIVE STRUCTURES:
  74 ;; (This is mostly for myself.)
  75 ;;
  76 ;; ARC         A series of (header,file).  No interactions among members.
  77 ;;
  78 ;; LZH         A series of (header,file).  Headers are checksummed.  No
  79 ;;             interaction among members.
  80 ;;
  81 ;; ZIP         A series of (lheader,fil) followed by a "central directory"
  82 ;;             which is a series of (cheader) followed by an end-of-
  83 ;;             central-dir record possibly followed by junk.  The e-o-c-d
  84 ;;             links to c-d.  cheaders link to lheaders which are basically
  85 ;;             cut-down versions of the cheaders.
  86 ;;
  87 ;; ZOO         An archive header followed by a series of (header,file).
  88 ;;             Each member header points to the next.  The archive is
  89 ;;             terminated by a bogus header with a zero next link.
  90 ;; -------------------------------------
  91 ;; HOOKS: `foo' means one the the supported archive types.
  92 ;;
  93 ;; archive-mode-hook
  94 ;; archive-foo-mode-hook
  95 ;; archive-extract-hooks
  96
  97 ;;; Code:
  98
  99 ;; -------------------------------------------------------------------------
 100 ;; Section: Configuration.
 101
 102 (defvar archive-dos-members t
 103   "*If non-nil then recognize member files using ^M^J as line terminator.")
 104
 105 (defvar archive-tmpdir
 106   (expand-file-name
 107    (make-temp-name (if (eq system-type 'ms-dos) "ar" "archive.tmp"))
 108    (or (getenv "TMPDIR") (getenv "TMP") "/tmp"))
 109   "*Directory for temporary files made by arc-mode.el")
 110
 111 (defvar archive-remote-regexp "^/[^/:]*[^/:.]:"
 112   "*Regexp recognizing archive files names that are not local.
 113 A non-local file is one whose file name is not proper outside Emacs.
 114 A local copy of the archive will be used when updating.")
 115
 116 (defvar archive-extract-hooks nil
 117   "*Hooks to run when an archive member has been extracted.")
 118 ;; ------------------------------
 119 ;; Arc archive configuration
 120
 121 ;; We always go via a local file since there seems to be no reliable way
 122 ;; to extract to stdout without junk getting added.
 123 (defvar archive-arc-extract
 124   '("arc" "x")
 125   "*Program and its options to run in order to extract an arc file member.
 126 Extraction should happen to the current directory.  Archive and member
 127 name will be added.")
 128
 129 (defvar archive-arc-expunge
 130   '("arc" "d")
 131   "*Program and its options to run in order to delete arc file members.
 132 Archive and member names will be added.")
 133
 134 (defvar archive-arc-write-file-member
 135   '("arc" "u")
 136   "*Program and its options to run in order to update an arc file member.
 137 Archive and member name will be added.")
 138 ;; ------------------------------
 139 ;; Lzh archive configuration
 140
 141 (defvar archive-lzh-extract
 142   '("lha" "pq")
 143   "*Program and its options to run in order to extract an lzh file member.
 144 Extraction should happen to standard output.  Archive and member name will
 145 be added.")
 146
 147 (defvar archive-lzh-expunge
 148   '("lha" "d")
 149   "*Program and its options to run in order to delete lzh file members.
 150 Archive and member names will be added.")
 151
 152 (defvar archive-lzh-write-file-member
 153   '("lha" "a")
 154   "*Program and its options to run in order to update an lzh file member.
 155 Archive and member name will be added.")
 156 ;; ------------------------------
 157 ;; Zip archive configuration
 158
 159 (defvar archive-zip-use-pkzip (memq system-type '(ms-dos windows-nt))
 160   "*If non-nil then pkzip option are used instead of zip options.
 161 Only set to true for msdog systems!")
 162
 163 (defvar archive-zip-extract
 164   (if archive-zip-use-pkzip '("pkunzip" "-e") '("unzip" "-qq" "-c"))
 165   "*Program and its options to run in order to extract a zip file member.
 166 Extraction should happen to standard output.  Archive and member name will
 167 be added.  If `archive-zip-use-pkzip' is non-nil then this program is
 168 expected to extract to a file junking the directory part of the name.")
 169
 170 ;; For several reasons the latter behaviour is not desirable in general.
 171 ;; (1) It uses more disk space.  (2) Error checking is worse or non-
 172 ;; existent.  (3) It tends to do funny things with other systems' file
 173 ;; names.
 174
 175 (defvar archive-zip-expunge
 176   (if archive-zip-use-pkzip '("pkzip" "-d") '("zip" "-d" "-q"))
 177   "*Program and its options to run in order to delete zip file members.
 178 Archive and member names will be added.")
 179
 180 (defvar archive-zip-update
 181   (if archive-zip-use-pkzip '("pkzip" "-u") '("zip" "-q"))
 182   "*Program and its options to run in order to update a zip file member.
 183 Options should ensure that specified directory will be put into the zip
 184 file.  Archive and member name will be added.")
 185
 186 (defvar archive-zip-update-case
 187   (if archive-zip-use-pkzip archive-zip-update '("zip" "-q" "-k"))
 188   "*Program and its options to run in order to update a case fiddled zip member.
 189 Options should ensure that specified directory will be put into the zip file.
 190 Archive and member name will be added.")
 191
 192 (defvar archive-zip-case-fiddle t
 193   "*If non-nil then zip file members are case fiddled.
 194 Case fiddling will only happen for members created by a system that
 195 uses caseless file names.")
 196 ;; ------------------------------
 197 ;; Zoo archive configuration
 198
 199 (defvar archive-zoo-extract
 200   '("zoo" "xpq")
 201   "*Program and its options to run in order to extract a zoo file member.
 202 Extraction should happen to standard output.  Archive and member name will
 203 be added.")
 204
 205 (defvar archive-zoo-expunge
 206   '("zoo" "DqPP")
 207   "*Program and its options to run in order to delete zoo file members.
 208 Archive and member names will be added.")
 209
 210 (defvar archive-zoo-write-file-member
 211   '("zoo" "a")
 212   "*Program and its options to run in order to update a zoo file member.
 213 Archive and member name will be added.")
 214 ;; -------------------------------------------------------------------------
 215 ;; Section: Variables
 216
 217 (defvar archive-subtype nil "*Symbol describing archive type.")
 218 (defvar archive-file-list-start nil "*Position of first contents line.")
 219 (defvar archive-file-list-end nil "*Position just after last contents line.")
 220 (defvar archive-proper-file-start nil "*Position of real archive's start.")
 221 (defvar archive-read-only nil "*Non-nil if the archive is read-only on disk.")
 222 (defvar archive-remote nil "*Non-nil if the archive is outside file system.")
 223 (defvar archive-local-name nil "*Name of local copy of remote archive.")
 224 (defvar archive-mode-map nil "*Local keymap for archive mode listings.")
 225 (defvar archive-file-name-indent nil "*Column where file names start.")
 226
 227 (defvar archive-alternate-display nil
 228   "*Non-nil when alternate information is shown.")
 229 (make-variable-buffer-local 'archive-alternate-display)
 230 (put 'archive-alternate-display 'permanent-local t)
 231
 232 (defvar archive-superior-buffer nil "*In archive members, points to archive.")
 233 (put 'archive-superior-buffer 'permanent-local t)
 234
 235 (defvar archive-subfile-mode nil "*Non-nil in archive member buffers.")
 236 (make-variable-buffer-local 'archive-subfile-mode)
 237 (put 'archive-subfile-mode 'permanent-local t)
 238
 239 (defvar archive-subfile-dos nil
 240   "Negation of `buffer-file-type', which see.")
 241 (make-variable-buffer-local 'archive-subfile-dos)
 242 (put 'archive-subfile-dos 'permanent-local t)
 243
 244 (defvar archive-files nil
 245   "Vector of file descriptors.
 246 Each descriptor is a vector of the form
 247  [EXT-FILE-NAME INT-FILE-NAME CASE-FIDDLED MODE ...]")
 248 (make-variable-buffer-local 'archive-files)
 249
 250 (defvar archive-lemacs
 251   (string-match "\\(Lucid\\|Xemacs\\)" emacs-version)
 252   "*Non-nil when running under under Lucid Emacs or Xemacs.")
 253 ;; -------------------------------------------------------------------------
 254 ;; Section: Support functions.
 255
 256 (defsubst archive-name (suffix)
 257   (intern (concat "archive-" (symbol-name archive-subtype) "-" suffix)))
 258
 259 (defun archive-l-e (str &optional len)
 260   "Convert little endian string/vector to integer.
 261 Alternatively, first argument may be a buffer position in the current buffer
 262 in which case a second argument, length, should be supplied."
 263   (if (stringp str)
 264       (setq len (length str))
 265     (setq str (buffer-substring str (+ str len))))
 266   (let ((result 0)
 267         (i 0))
 268     (while (< i len)
 269       (setq i (1+ i)
 270             result (+ (ash result 8) (aref str (- len i)))))
 271     result))
 272
 273 (defun archive-int-to-mode (mode)
 274   "Turn an integer like 0700 (i.e., 448) into a mode string like -rwx------"
 275   (let ((str (make-string 10 ?-)))
 276     (or (zerop (logand 16384 mode)) (aset str 0 ?d))
 277     (or (zerop (logand  8192 mode)) (aset str 0 ?c)) ; completeness
 278     (or (zerop (logand   256 mode)) (aset str 1 ?r))
 279     (or (zerop (logand   128 mode)) (aset str 2 ?w))
 280     (or (zerop (logand    64 mode)) (aset str 3 ?x))
 281     (or (zerop (logand    32 mode)) (aset str 4 ?r))
 282     (or (zerop (logand    16 mode)) (aset str 5 ?w))
 283     (or (zerop (logand     8 mode)) (aset str 6 ?x))
 284     (or (zerop (logand     4 mode)) (aset str 7 ?r))
 285     (or (zerop (logand     2 mode)) (aset str 8 ?w))
 286     (or (zerop (logand     1 mode)) (aset str 9 ?x))
 287     (or (zerop (logand  1024 mode)) (aset str 3 (if (zerop (logand 64 mode))
 288                                                     ?S ?s)))
 289     (or (zerop (logand  2048 mode)) (aset str 6 (if (zerop (logand  8 mode))
 290                                                     ?S ?s)))
 291     str))
 292
 293 (defun archive-calc-mode (oldmode newmode &optional error)
 294   "From the integer OLDMODE and the string NEWMODE calculate a new file mode.
 295 NEWMODE may be an octal number including a leading zero in which case it
 296 will become the new mode.\n
 297 NEWMODE may also be a relative specification like \"og-rwx\" in which case
 298 OLDMODE will be modified accordingly just like chmod(2) would have done.\n
 299 If optional third argument ERROR is non-nil an error will be signaled if
 300 the mode is invalid.  If ERROR is nil then nil will be returned."
 301   (cond ((string-match "^0[0-7]*$" newmode)
 302          (let ((result 0)
 303                (len (length newmode))
 304                (i 1))
 305            (while (< i len)
 306              (setq result (+ (lsh result 3) (aref newmode i) (- ?0))
 307                    i (1+ i)))
 308            (logior (logand oldmode 65024) result)))
 309         ((string-match "^\\([agou]+\\)\\([---+=]\\)\\([rwxst]+\\)$" newmode)
 310          (let ((who 0)
 311                (result oldmode)
 312                (op (aref newmode (match-beginning 2)))
 313                (bits 0)
 314                (i (match-beginning 3)))
 315            (while (< i (match-end 3))
 316              (let ((rwx (aref newmode i)))
 317                (setq bits (logior bits (cond ((= rwx ?r)  292)
 318                                              ((= rwx ?w)  146)
 319                                              ((= rwx ?x)   73)
 320                                              ((= rwx ?s) 3072)
 321                                              ((= rwx ?t)  512)))
 322                      i (1+ i))))
 323            (while (< who (match-end 1))
 324              (let* ((whoc (aref newmode who))
 325                     (whomask (cond ((= whoc ?a) 4095)
 326                                    ((= whoc ?u) 1472)
 327                                    ((= whoc ?g) 2104)
 328                                    ((= whoc ?o)    7))))
 329                (if (= op ?=)
 330                    (setq result (logand result (lognot whomask))))
 331                (if (= op ?-)
 332                    (setq result (logand result (lognot (logand whomask bits))))
 333                  (setq result (logior result (logand whomask bits)))))
 334              (setq who (1+ who)))
 335            result))
 336         (t
 337          (if error
 338              (error "Invalid mode specification: %s" newmode)))))
 339
 340 (defun archive-dosdate (date)
 341   "Stringify dos packed DATE record."
 342   (let ((year (+ 1980 (logand (ash date -9) 127)))
 343         (month (logand (ash date -5) 15))
 344         (day (logand date 31)))
 345     (if (or (> month 12) (< month 1))
 346         ""
 347       (format "%2d-%s-%d"
 348               day
 349               (aref ["Jan" "Feb" "Mar" "Apr" "May" "Jun"
 350                      "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"] (1- month))
 351               year))))
 352
 353 (defun archive-dostime (time)
 354   "Stringify dos packed TIME record."
 355   (let ((hour (logand (ash time -11) 31))
 356         (minute (logand (ash time -5) 53))
 357         (second (* 2 (logand time 31)))) ; 2 seconds resolution
 358     (format "%02d:%02d:%02d" hour minute second)))
 359
 360 ;;(defun archive-unixdate (low high)
 361 ;;  "Stringify unix (LOW HIGH) date."
 362 ;;  (let ((str (current-time-string (cons high low))))
 363 ;;    (format "%s-%s-%s"
 364 ;;          (substring str 8 9)
 365 ;;          (substring str 4 7)
 366 ;;          (substring str 20 24))))
 367
 368 ;;(defun archive-unixtime (low high)
 369 ;;  "Stringify unix (LOW HIGH) time."
 370 ;;  (let ((str (current-time-string (cons high low))))
 371 ;;    (substring str 11 19)))
 372
 373 (defun archive-get-lineno ()
 374   (if (>= (point) archive-file-list-start)
 375       (count-lines archive-file-list-start
 376                    (save-excursion (beginning-of-line) (point)))
 377     0))
 378
 379 (defun archive-get-descr (&optional noerror)
 380   "Return the descriptor vector for file at point.
 381 Does not signal an error if optional second argument NOERROR is non-nil."
 382   (let ((no (archive-get-lineno)))
 383     (if (and (>= (point) archive-file-list-start)
 384              (< no (length archive-files)))
 385         (let ((item (aref archive-files no)))
 386           (if (vectorp item)
 387               item
 388             (if (not noerror)
 389                 (error "Entry is not a regular member of the archive"))))
 390       (if (not noerror)
 391           (error "Line does not describe a member of the archive")))))
 392 ;; -------------------------------------------------------------------------
 393 ;; Section: the mode definition
 394
 395 ;;;###autoload
 396 (defun archive-mode (&optional force)
 397   "Major mode for viewing an archive file in a dired-like way.
 398 You can move around using the usual cursor motion commands.
 399 Letters no longer insert themselves.
 400 Type `e' to pull a file out of the archive and into its own buffer;
 401 or click mouse-2 on the file's line in the archive mode buffer.
 402
 403 If you edit a sub-file of this archive (as with the `e' command) and
 404 save it, the contents of that buffer will be saved back into the
 405 archive.
 406
 407 \\{archive-mode-map}"
 408   ;; This is not interactive because you shouldn't be turning this
 409   ;; mode on and off.  You can corrupt things that way.
 410   (if (zerop (buffer-size))
 411       ;; At present we cannot create archives from scratch
 412       (funcall default-major-mode)
 413     (if (and (not force) archive-files) nil
 414       (let* ((type (archive-find-type))
 415              (typename (copy-sequence (symbol-name type))))
 416         (aset typename 0 (upcase (aref typename 0)))
 417         (kill-all-local-variables)
 418         (make-local-variable 'archive-subtype)
 419         (setq archive-subtype type)
 420
 421         ;; Buffer contains treated image of file before the file contents
 422         (make-local-variable 'revert-buffer-function)
 423         (setq revert-buffer-function 'archive-mode-revert)
 424         (auto-save-mode 0)
 425         (make-local-variable 'local-write-file-hooks)
 426         (add-hook 'local-write-file-hooks 'archive-write-file)
 427
 428         ;; Real file contents is binary
 429         (make-local-variable 'require-final-newline)
 430         (setq require-final-newline nil)
 431         (make-local-variable 'enable-local-variables)
 432         (setq enable-local-variables nil)
 433         (if (boundp 'default-buffer-file-type)
 434             (setq buffer-file-type t))
 435
 436         (make-local-variable 'archive-read-only)
 437         (setq archive-read-only (not (file-writable-p (buffer-file-name))))
 438
 439         ;; Should we use a local copy when accessing from outside Emacs?
 440         (make-local-variable 'archive-local-name)
 441         (make-local-variable 'archive-remote)
 442         (setq archive-remote (string-match archive-remote-regexp
 443                                            (buffer-file-name)))
 444
 445         (setq major-mode 'archive-mode)
 446         (setq mode-name (concat typename "-Archive"))
 447         ;; Run archive-foo-mode-hook and archive-mode-hook
 448         (run-hooks (archive-name "mode-hook") 'archive-mode-hook)
 449         (use-local-map archive-mode-map))
 450
 451       (make-local-variable 'archive-proper-file-start)
 452       (make-local-variable 'archive-file-list-start)
 453       (make-local-variable 'archive-file-list-end)
 454       (make-local-variable 'archive-file-name-indent)
 455       (archive-summarize)
 456       (setq buffer-read-only t))))
 457
 458 ;; Archive mode is suitable only for specially formatted data.
 459 (put 'archive-mode 'mode-class 'special)
 460 ;; -------------------------------------------------------------------------
 461 ;; Section: Key maps
 462
 463 (if archive-mode-map nil
 464   (setq archive-mode-map (make-keymap))
 465   (suppress-keymap archive-mode-map)
 466   (define-key archive-mode-map " " 'archive-next-line)
 467   (define-key archive-mode-map "a" 'archive-alternate-display)
 468   ;;(define-key archive-mode-map "c" 'archive-copy)
 469   (define-key archive-mode-map "d" 'archive-flag-deleted)
 470   (define-key archive-mode-map "\C-d" 'archive-flag-deleted)
 471   (define-key archive-mode-map "e" 'archive-extract)
 472   (define-key archive-mode-map "f" 'archive-extract)
 473   (define-key archive-mode-map "\C-m" 'archive-extract)
 474   (define-key archive-mode-map "g" 'revert-buffer)
 475   (define-key archive-mode-map "h" 'describe-mode)
 476   (define-key archive-mode-map "m" 'archive-mark)
 477   (define-key archive-mode-map "n" 'archive-next-line)
 478   (define-key archive-mode-map "\C-n" 'archive-next-line)
 479   (define-key archive-mode-map [down] 'archive-next-line)
 480   (define-key archive-mode-map "o" 'archive-extract-other-window)
 481   (define-key archive-mode-map "p" 'archive-previous-line)
 482   (define-key archive-mode-map "\C-p" 'archive-previous-line)
 483   (define-key archive-mode-map [up] 'archive-previous-line)
 484   (define-key archive-mode-map "r" 'archive-rename-entry)
 485   (define-key archive-mode-map "u" 'archive-unflag)
 486   (define-key archive-mode-map "\M-\C-?" 'archive-unmark-all-files)
 487   (define-key archive-mode-map "v" 'archive-view)
 488   (define-key archive-mode-map "x" 'archive-expunge)
 489   (define-key archive-mode-map "\177" 'archive-unflag-backwards)
 490   (define-key archive-mode-map "E" 'archive-extract-other-window)
 491   (define-key archive-mode-map "M" 'archive-chmod-entry)
 492   (define-key archive-mode-map "G" 'archive-chgrp-entry)
 493   (define-key archive-mode-map "O" 'archive-chown-entry)
 494
 495   (if archive-lemacs
 496       (progn
 497         ;; Not a nice "solution" but it'll have to do
 498         (define-key archive-mode-map "\C-xu" 'archive-undo)
 499         (define-key archive-mode-map "\C-_" 'archive-undo))
 500     (substitute-key-definition 'undo 'archive-undo
 501                                archive-mode-map global-map))
 502
 503   (define-key archive-mode-map
 504     (if archive-lemacs 'button2 [mouse-2]) 'archive-mouse-extract)
 505
 506   (if archive-lemacs
 507       ()                                ; out of luck
 508     ;; Get rid of the Edit menu bar item to save space.
 509     (define-key archive-mode-map [menu-bar edit] 'undefined)
 510
 511     (define-key archive-mode-map [menu-bar immediate]
 512       (cons "Immediate" (make-sparse-keymap "Immediate")))
 513     (define-key archive-mode-map [menu-bar immediate alternate]
 514       '("Alternate Display" . archive-alternate-display))
 515     (put 'archive-alternate-display 'menu-enable
 516          '(boundp (archive-name "alternate-display")))
 517     (define-key archive-mode-map [menu-bar immediate view]
 518       '("View This File" . archive-view))
 519     (define-key archive-mode-map [menu-bar immediate display]
 520       '("Display in Other Window" . archive-display-other-window))
 521     (define-key archive-mode-map [menu-bar immediate find-file-other-window]
 522       '("Find in Other Window" . archive-extract-other-window))
 523     (define-key archive-mode-map [menu-bar immediate find-file]
 524       '("Find This File" . archive-extract))
 525
 526     (define-key archive-mode-map [menu-bar mark]
 527       (cons "Mark" (make-sparse-keymap "Mark")))
 528     (define-key archive-mode-map [menu-bar mark unmark-all]
 529       '("Unmark All" . archive-unmark-all-files))
 530     (define-key archive-mode-map [menu-bar mark deletion]
 531       '("Flag" . archive-flag-deleted))
 532     (define-key archive-mode-map [menu-bar mark unmark]
 533       '("Unflag" . archive-unflag))
 534     (define-key archive-mode-map [menu-bar mark mark]
 535       '("Mark" . archive-mark))
 536
 537     (define-key archive-mode-map [menu-bar operate]
 538       (cons "Operate" (make-sparse-keymap "Operate")))
 539     (define-key archive-mode-map [menu-bar operate chown]
 540       '("Change Owner..." . archive-chown-entry))
 541     (put 'archive-chown-entry 'menu-enable
 542          '(fboundp (archive-name "chown-entry")))
 543     (define-key archive-mode-map [menu-bar operate chgrp]
 544       '("Change Group..." . archive-chgrp-entry))
 545     (put 'archive-chgrp-entry 'menu-enable
 546          '(fboundp (archive-name "chgrp-entry")))
 547     (define-key archive-mode-map [menu-bar operate chmod]
 548       '("Change Mode..." . archive-chmod-entry))
 549     (put 'archive-chmod-entry 'menu-enable
 550          '(fboundp (archive-name "chmod-entry")))
 551     (define-key archive-mode-map [menu-bar operate rename]
 552       '("Rename to..." . archive-rename-entry))
 553     (put 'archive-rename-entry 'menu-enable
 554          '(fboundp (archive-name "rename-entry")))
 555     ;;(define-key archive-mode-map [menu-bar operate copy]
 556     ;;  '("Copy to..." . archive-copy))
 557     (define-key archive-mode-map [menu-bar operate expunge]
 558       '("Expunge Marked Files" . archive-expunge))
 559   ))
 560
 561 (let* ((item1 '(archive-subfile-mode " Archive"))
 562        (item2 '(archive-subfile-dos " Dos"))
 563        (items (if (memq system-type '(ms-dos windows-nt))
 564                   (list item1) ; msdog has its own indicator
 565                 (list item1 item2))))
 566   (or (member item1 minor-mode-alist)
 567       (setq minor-mode-alist (append items minor-mode-alist))))
 568 ;; -------------------------------------------------------------------------
 569 (defun archive-find-type ()
 570   (widen)
 571   (goto-char (point-min))
 572   ;; The funny [] here make it unlikely that the .elc file will be treated
 573   ;; as an archive by other software.
 574   (let (case-fold-search)
 575     (cond ((looking-at "[P]K\003\004") 'zip)
 576           ((looking-at "..-l[hz][0-9]-") 'lzh)
 577           ((looking-at "....................[\334]\247\304\375") 'zoo)
 578           ((and (looking-at "\C-z")     ; signature too simple, IMHO
 579                 (string-match "\\.[aA][rR][cC]$"
 580                               (or buffer-file-name (buffer-name))))
 581            'arc)
 582           (t (error "Buffer format not recognized.")))))
 583 ;; -------------------------------------------------------------------------
 584 (defun archive-summarize ()
 585   "Parse the contents of the archive file in the current buffer.
 586 Place a dired-like listing on the front;
 587 then narrow to it, so that only that listing
 588 is visible (and the real data of the buffer is hidden)."
 589   (widen)
 590   (let (buffer-read-only)
 591     (message "Parsing archive file...")
 592     (buffer-disable-undo (current-buffer))
 593     (setq archive-files (funcall (archive-name "summarize")))
 594     (message "Parsing archive file...done.")
 595     (setq archive-proper-file-start (point-marker))
 596     (narrow-to-region (point-min) (point))
 597     (set-buffer-modified-p nil)
 598     (buffer-enable-undo))
 599   (goto-char archive-file-list-start)
 600   (archive-next-line 0))
 601
 602 (defun archive-resummarize ()
 603   "Recreate the contents listing of an archive."
 604   (let ((modified (buffer-modified-p))
 605         (no (archive-get-lineno))
 606         buffer-read-only)
 607     (widen)
 608     (delete-region (point-min) archive-proper-file-start)
 609     (archive-summarize)
 610     (set-buffer-modified-p modified)
 611     (goto-char archive-file-list-start)
 612     (archive-next-line no)))
 613
 614 (defun archive-summarize-files (files)
 615   "Insert a description of a list of files annotated with proper mouse face."
 616   (setq archive-file-list-start (point-marker))
 617   (setq archive-file-name-indent (if files (aref (car files) 1) 0))
 618   ;; We don't want to do an insert for each element since that takes too
 619   ;; long when the archive -- which has to be moved in memory -- is large.
 620   (insert
 621    (apply
 622     (function concat)
 623     (mapcar
 624      (function
 625       (lambda (fil)
 626         ;; Using `concat' here copies the text also, so we can add
 627         ;; properties without problems.
 628         (let ((text (concat (aref fil 0) "\n")))
 629           (if archive-lemacs
 630               ()                        ; out of luck
 631             (put-text-property (aref fil 1) (aref fil 2)
 632                                'mouse-face 'highlight
 633                                text))
 634           text)))
 635      files)))
 636   (setq archive-file-list-end (point-marker)))
 637
 638 (defun archive-alternate-display ()
 639   "Toggle alternative display.
 640 To avoid very long lines some archive mode don't show all information.
 641 This function changes the set of information shown for each files."
 642   (interactive)
 643   (setq archive-alternate-display (not archive-alternate-display))
 644   (archive-resummarize))
 645 ;; -------------------------------------------------------------------------
 646 ;; Section: Local archive copy handling
 647
 648 (defun archive-maybe-copy (archive)
 649   (if archive-remote
 650       (let ((start (point-max)))
 651         (setq archive-local-name (expand-file-name
 652                                   (file-name-nondirectory archive)
 653                                   archive-tmpdir))
 654         (make-directory archive-tmpdir t)
 655         (save-restriction
 656           (widen)
 657           (write-region start (point-max) archive-local-name nil 'nomessage))
 658         archive-local-name)
 659     (if (buffer-modified-p) (save-buffer))
 660     archive))
 661
 662 (defun archive-maybe-update (unchanged)
 663   (if archive-remote
 664       (let ((name archive-local-name)
 665             (modified (buffer-modified-p))
 666             buffer-read-only)
 667         (if unchanged nil
 668           (erase-buffer)
 669           (insert-file-contents name)
 670           (archive-mode t))
 671         (archive-delete-local name)
 672         (if (not unchanged)
 673             (message "Archive file must be saved for changes to take effect"))
 674         (set-buffer-modified-p (or modified (not unchanged))))))
 675
 676 (defun archive-delete-local (name)
 677   "Delete file NAME and its parents up to and including `archive-tmpdir'."
 678   (let ((again t)
 679         (top (directory-file-name (file-name-as-directory archive-tmpdir))))
 680     (condition-case nil
 681         (delete-file name)
 682       (error nil))
 683     (while again
 684       (setq name (directory-file-name (file-name-directory name)))
 685       (condition-case nil
 686           (delete-directory name)
 687         (error nil))
 688       (if (string= name top) (setq again nil)))))
 689 ;; -------------------------------------------------------------------------
 690 ;; Section: Member extraction
 691
 692 (defun archive-mouse-extract (event)
 693   "Extract a file whose name you click on."
 694   (interactive "e")
 695   (mouse-set-point event)
 696   (switch-to-buffer
 697    (save-excursion
 698      (archive-extract)
 699      (current-buffer))))
 700
 701 (defun archive-extract (&optional other-window-p)
 702   "In archive mode, extract this entry of the archive into its own buffer."
 703   (interactive)
 704   (let* ((view-p (eq other-window-p 'view))
 705          (descr (archive-get-descr))
 706          (ename (aref descr 0))
 707          (iname (aref descr 1))
 708          (archive-buffer (current-buffer))
 709          (arcdir default-directory)
 710          (archive (buffer-file-name))
 711          (arcname (file-name-nondirectory archive))
 712          (bufname (concat (file-name-nondirectory iname) " (" arcname ")"))
 713          (extractor (archive-name "extract"))
 714          (read-only-p (or archive-read-only view-p))
 715          (buffer (get-buffer bufname))
 716          (just-created nil))
 717       (if buffer
 718           nil
 719         (setq archive (archive-maybe-copy archive))
 720         (setq buffer (get-buffer-create bufname))
 721         (setq just-created t)
 722         (save-excursion
 723           (set-buffer buffer)
 724           (setq buffer-file-name
 725                 (expand-file-name (concat arcname ":" iname)))
 726           (setq buffer-file-truename
 727                 (abbreviate-file-name buffer-file-name))
 728           ;; Set the default-directory to the dir of the superior buffer.
 729           (setq default-directory arcdir)
 730           (make-local-variable 'archive-superior-buffer)
 731           (setq archive-superior-buffer archive-buffer)
 732           (make-local-variable 'local-write-file-hooks)
 733           (add-hook 'local-write-file-hooks 'archive-write-file-member)
 734           (setq archive-subfile-mode descr)
 735           (setq archive-subfile-dos nil)
 736           (if (boundp 'default-buffer-file-type)
 737               (setq buffer-file-type t))
 738           (if (fboundp extractor)
 739               (funcall extractor archive ename)
 740             (archive-*-extract archive ename (symbol-value extractor)))
 741           (if archive-dos-members (archive-check-dos))
 742           (goto-char (point-min))
 743           (rename-buffer bufname)
 744           (setq buffer-read-only read-only-p)
 745           (setq buffer-undo-list nil)
 746           (set-buffer-modified-p nil)
 747           (setq buffer-saved-size (buffer-size))
 748           (normal-mode)
 749           ;; Just in case an archive occurs inside another archive.
 750           (if (eq major-mode 'archive-mode)
 751               (setq archive-remote t))
 752           (run-hooks 'archive-extract-hooks))
 753         (archive-maybe-update t))
 754       (if view-p
 755           (view-buffer buffer (and just-created 'kill-buffer))
 756         (if (eq other-window-p 'display)
 757             (display-buffer buffer)
 758           (if other-window-p
 759               (switch-to-buffer-other-window buffer)
 760             (switch-to-buffer buffer))))))
 761
 762 (defun archive-*-extract (archive name command)
 763   (let* ((default-directory (file-name-as-directory archive-tmpdir))
 764          (tmpfile (expand-file-name (file-name-nondirectory name)
 765                                     default-directory)))
 766     (make-directory (directory-file-name default-directory) t)
 767     (apply 'call-process
 768            (car command)
 769            nil
 770            nil
 771            nil
 772            (append (cdr command) (list archive name)))
 773     (insert-file-contents tmpfile)
 774     (archive-delete-local tmpfile)))
 775
 776 (defun archive-extract-by-stdout (archive name command)
 777   (let ((binary-process-output t)) ; for Ms-Dos
 778     (apply 'call-process
 779            (car command)
 780            nil
 781            t
 782            nil
 783            (append (cdr command) (list archive name)))))
 784
 785 (defun archive-extract-other-window ()
 786   "In archive mode, find this member in another window."
 787   (interactive)
 788   (archive-extract t))
 789
 790 (defun archive-display-other-window ()
 791   "In archive mode, display this member in another window."
 792   (interactive)
 793   (archive-extract 'display))
 794
 795 (defun archive-view ()
 796   "In archive mode, view the member on this line."
 797   (interactive)
 798   (archive-extract 'view))
 799
 800 (defun archive-add-new-member (arcbuf name)
 801   "Add current buffer to the archive in ARCBUF naming it NAME."
 802   (interactive
 803    (list (get-buffer
 804           (read-buffer "Buffer containing archive: "
 805                        ;; Find first archive buffer and suggest that
 806                        (let ((bufs (buffer-list)))
 807                          (while (and bufs (not (eq (save-excursion
 808                                                      (set-buffer (car bufs))
 809                                                      major-mode)
 810                                                    'archive-mode)))
 811                            (setq bufs (cdr bufs)))
 812                          (if bufs
 813                              (car bufs)
 814                            (error "There are no archive buffers")))
 815                        t))
 816          (read-string "File name in archive: "
 817                       (if buffer-file-name
 818                           (file-name-nondirectory buffer-file-name)
 819                         ""))))
 820   (save-excursion
 821     (set-buffer arcbuf)
 822     (or (eq major-mode 'archive-mode)
 823         (error "Buffer is not an archive buffer"))
 824     (if archive-read-only
 825         (error "Archive is read-only")))
 826   (if (eq arcbuf (current-buffer))
 827       (error "An archive buffer cannot be added to itself"))
 828   (if (string= name "")
 829       (error "Archive members may not be given empty names"))
 830   (let ((func (save-excursion (set-buffer arcbuf)
 831                               (archive-name "add-new-member")))
 832         (membuf (current-buffer)))
 833     (if (fboundp func)
 834         (save-excursion
 835           (set-buffer arcbuf)
 836           (funcall func buffer-file-name membuf name))
 837       (error "Adding a new member is not supported for this archive type"))))
 838 ;; -------------------------------------------------------------------------
 839 ;; Section: IO stuff
 840
 841 (defun archive-check-dos (&optional force)
 842   "*Possibly handle a buffer with ^M^J terminated lines."
 843   (save-restriction
 844     (widen)
 845     (save-excursion
 846       (goto-char (point-min))
 847       (setq archive-subfile-dos
 848             (or force (not (search-forward-regexp "[^\r]\n" nil t))))
 849       (if (boundp 'default-buffer-file-type)
 850           (setq buffer-file-type (not archive-subfile-dos)))
 851       (if archive-subfile-dos
 852           (let ((modified (buffer-modified-p)))
 853             (buffer-disable-undo (current-buffer))
 854             (goto-char (point-min))
 855             (while (search-forward "\r\n" nil t)
 856               (replace-match "\n"))
 857             (buffer-enable-undo)
 858             (set-buffer-modified-p modified))))))
 859
 860 (defun archive-write-file-member ()
 861   (if archive-subfile-dos
 862       (save-restriction
 863         (widen)
 864         (save-excursion
 865           (goto-char (point-min))
 866           ;; We don't want our ^M^J <--> ^J changes to show in the undo list
 867           (let ((undo-list buffer-undo-list))
 868             (unwind-protect
 869                 (progn
 870                   (setq buffer-undo-list t)
 871                   (while (search-forward "\n" nil t)
 872                     (replace-match "\r\n"))
 873                   (setq archive-subfile-dos nil)
 874                   (if (boundp 'default-buffer-file-type)
 875                       (setq buffer-file-type t))
 876                   ;; OK, we're now have explicit ^M^Js -- save and re-unixfy
 877                   (archive-write-file-member))
 878               (progn
 879                 (archive-check-dos t)
 880                 (setq buffer-undo-list undo-list))))
 881           t))
 882     (save-excursion
 883       (save-restriction
 884         (message "Updating archive...")
 885         (widen)
 886         (let ((writer  (save-excursion (set-buffer archive-superior-buffer)
 887                                        (archive-name "write-file-member")))
 888               (archive (save-excursion (set-buffer archive-superior-buffer)
 889                                        (buffer-file-name))))
 890           (if (fboundp writer)
 891               (funcall writer archive archive-subfile-mode)
 892             (archive-*-write-file-member archive
 893                                          archive-subfile-mode
 894                                          (symbol-value writer))))
 895         (set-buffer-modified-p nil)
 896         (message "Updating archive...done")
 897         (set-buffer archive-superior-buffer)
 898         (revert-buffer)
 899         t))))
 900
 901 (defun archive-*-write-file-member (archive descr command)
 902   (let* ((ename (aref descr 0))
 903          (tmpfile (expand-file-name ename archive-tmpdir))
 904          (top (directory-file-name (file-name-as-directory archive-tmpdir)))
 905          (default-directory (file-name-as-directory top)))
 906     (unwind-protect
 907         (progn
 908           (make-directory (file-name-directory tmpfile) t)
 909           (write-region (point-min) (point-max) tmpfile nil 'nomessage)
 910           (if (aref descr 3)
 911               ;; Set the file modes, but make sure we can read it.
 912               (set-file-modes tmpfile (logior ?\400 (aref descr 3))))
 913           (let ((exitcode (apply 'call-process
 914                                  (car command)
 915                                  nil
 916                                  nil
 917                                  nil
 918                                  (append (cdr command) (list archive ename)))))
 919             (if (equal exitcode 0)
 920                 nil
 921               (error "Updating was unsuccessful (%S)" exitcode))))
 922       (archive-delete-local tmpfile))))
 923
 924 (defun archive-write-file ()
 925   (save-excursion
 926     (write-region archive-proper-file-start (point-max) buffer-file-name nil t)
 927     (set-buffer-modified-p nil)
 928     t))
 929 ;; -------------------------------------------------------------------------
 930 ;; Section: Marking and unmarking.
 931
 932 (defun archive-flag-deleted (p &optional type)
 933   "In archive mode, mark this member to be deleted from the archive.
 934 With a prefix argument, mark that many files."
 935   (interactive "p")
 936   (or type (setq type ?D))
 937   (beginning-of-line)
 938   (let ((sign (if (>= p 0) +1 -1))
 939         (modified (buffer-modified-p))
 940         buffer-read-only)
 941     (while (not (zerop p))
 942       (if (archive-get-descr t)
 943           (progn
 944             (delete-char 1)
 945             (insert type)))
 946       (forward-line sign)
 947       (setq p (- p sign)))
 948     (set-buffer-modified-p modified))
 949   (archive-next-line 0))
 950
 951 (defun archive-unflag (p)
 952   "In archive mode, un-mark this member if it is marked to be deleted.
 953 With a prefix argument, un-mark that many files forward."
 954   (interactive "p")
 955   (archive-flag-deleted p ? ))
 956
 957 (defun archive-unflag-backwards (p)
 958   "In archive mode, un-mark this member if it is marked to be deleted.
 959 With a prefix argument, un-mark that many members backward."
 960   (interactive "p")
 961   (archive-flag-deleted (- p) ? ))
 962
 963 (defun archive-unmark-all-files ()
 964   "Remove all marks."
 965   (interactive)
 966   (let ((modified (buffer-modified-p))
 967         buffer-read-only)
 968     (save-excursion
 969       (goto-char archive-file-list-start)
 970       (while (< (point) archive-file-list-end)
 971         (or (= (following-char) ? )
 972             (progn (delete-char 1) (insert ? )))
 973         (forward-line 1)))
 974     (set-buffer-modified-p modified)))
 975
 976 (defun archive-mark (p)
 977   "In archive mode, mark this member for group operations.
 978 With a prefix argument, mark that many members.
 979 Use \\[archive-unmark-all-files] to remove all marks."
 980   (interactive "p")
 981   (archive-flag-deleted p ?*))
 982
 983 (defun archive-get-marked (mark &optional default)
 984   (let (files)
 985     (save-excursion
 986       (goto-char archive-file-list-start)
 987       (while (< (point) archive-file-list-end)
 988         (if (= (following-char) mark)
 989             (setq files (cons (archive-get-descr) files)))
 990         (forward-line 1)))
 991     (or (nreverse files)
 992         (and default
 993              (list (archive-get-descr))))))
 994 ;; -------------------------------------------------------------------------
 995 ;; Section: Operate
 996
 997 (defun archive-next-line (p)
 998   (interactive "p")
 999   (forward-line p)
1000   (or (eobp)
1001       (forward-char archive-file-name-indent)))
1002
1003 (defun archive-previous-line (p)
1004   (interactive "p")
1005   (archive-next-line (- p)))
1006
1007 (defun archive-chmod-entry (new-mode)
1008   "Change the protection bits associated with all marked or this member.
1009 The new protection bits can either be specified as an octal number or
1010 as a relative change like \"g+rw\" as for chmod(2)"
1011   (interactive "sNew mode (octal or relative): ")
1012   (if archive-read-only (error "Archive is read-only"))
1013   (let ((func (archive-name "chmod-entry")))
1014     (if (fboundp func)
1015         (progn
1016           (funcall func new-mode (archive-get-marked ?* t))
1017           (archive-resummarize))
1018       (error "Setting mode bits is not supported for this archive type"))))
1019
1020 (defun archive-chown-entry (new-uid)
1021   "Change the owner of all marked or this member."
1022   (interactive "nNew uid: ")
1023   (if archive-read-only (error "Archive is read-only"))
1024   (let ((func (archive-name "chown-entry")))
1025     (if (fboundp func)
1026         (progn
1027           (funcall func new-uid (archive-get-marked ?* t))
1028           (archive-resummarize))
1029       (error "Setting owner is not supported for this archive type"))))
1030
1031 (defun archive-chgrp-entry (new-gid)
1032   "Change the group of all marked or this member."
1033   (interactive "nNew gid: ")
1034   (if archive-read-only (error "Archive is read-only"))
1035   (let ((func (archive-name "chgrp-entry")))
1036     (if (fboundp func)
1037         (progn
1038           (funcall func new-gid (archive-get-marked ?* t))
1039           (archive-resummarize))
1040       (error "Setting group is not supported for this archive type"))))
1041
1042 (defun archive-expunge ()
1043   "Do the flagged deletions."
1044   (interactive)
1045   (let (files)
1046     (save-excursion
1047       (goto-char archive-file-list-start)
1048       (while (< (point) archive-file-list-end)
1049         (if (= (following-char) ?D)
1050             (setq files (cons (aref (archive-get-descr) 0) files)))
1051         (forward-line 1)))
1052     (setq files (nreverse files))
1053     (and files
1054          (or (not archive-read-only)
1055              (error "Archive is read-only"))
1056          (or (yes-or-no-p (format "Really delete %d member%s? "
1057                                   (length files)
1058                                   (if (null (cdr files)) "" "s")))
1059              (error "Operation aborted"))
1060          (let ((archive (archive-maybe-copy (buffer-file-name)))
1061                (expunger (archive-name "expunge")))
1062            (if (fboundp expunger)
1063                (funcall expunger archive files)
1064              (archive-*-expunge archive files (symbol-value expunger)))
1065            (archive-maybe-update nil)
1066            (if archive-remote
1067                (archive-resummarize)
1068              (revert-buffer))))))
1069
1070 (defun archive-*-expunge (archive files command)
1071   (apply 'call-process
1072          (car command)
1073          nil
1074          nil
1075          nil
1076          (append (cdr command) (cons archive files))))
1077
1078 (defun archive-rename-entry (newname)
1079   "Change the name associated with this entry in the tar file."
1080   (interactive "sNew name: ")
1081   (if archive-read-only (error "Archive is read-only"))
1082   (if (string= newname "")
1083       (error "Archive members may not be given empty names"))
1084   (let ((func (archive-name "rename-entry"))
1085         (descr (archive-get-descr)))
1086     (if (fboundp func)
1087         (progn
1088           (funcall func (buffer-file-name) newname descr)
1089           (archive-resummarize))
1090       (error "Renaming is not supported for this archive type"))))
1091
1092 ;; Revert the buffer and recompute the dired-like listing.
1093 (defun archive-mode-revert (&optional no-autosave no-confirm)
1094   (let ((no (archive-get-lineno)))
1095     (setq archive-files nil)
1096     (let ((revert-buffer-function nil))
1097       (revert-buffer t t))
1098     (archive-mode)
1099     (goto-char archive-file-list-start)
1100     (archive-next-line no)))
1101
1102 (defun archive-undo ()
1103   "Undo in an archive buffer.
1104 This doesn't recover lost files, it just undoes changes in the buffer itself."
1105   (interactive)
1106   (let (buffer-read-only)
1107     (undo)))
1108 ;; -------------------------------------------------------------------------
1109 ;; Section: Arc Archives
1110
1111 (defun archive-arc-summarize ()
1112   (let ((p 1)
1113         (totalsize 0)
1114         (maxlen 8)
1115         files
1116         visual)
1117     (while (and (< (+ p 29) (point-max))
1118                 (= (char-after p) ?\C-z)
1119                 (> (char-after (1+ p)) 0))
1120       (let* ((namefld (buffer-substring (+ p 2) (+ p 2 13)))
1121              (fnlen   (or (string-match "\0" namefld) 13))
1122              (efnname (substring namefld 0 fnlen))
1123              (csize   (archive-l-e (+ p 15) 4))
1124              (moddate (archive-l-e (+ p 19) 2))
1125              (modtime (archive-l-e (+ p 21) 2))
1126              (ucsize  (archive-l-e (+ p 25) 4))
1127              (fiddle  (string= efnname (upcase efnname)))
1128              (ifnname (if fiddle (downcase efnname) efnname))
1129              (text    (format "  %8d  %-11s  %-8s  %s"
1130                               ucsize
1131                               (archive-dosdate moddate)
1132                               (archive-dostime modtime)
1133                               ifnname)))
1134         (setq maxlen (max maxlen fnlen)
1135               totalsize (+ totalsize ucsize)
1136               visual (cons (vector text
1137                                    (- (length text) (length ifnname))
1138                                    (length text))
1139                            visual)
1140               files (cons (vector efnname ifnname fiddle nil (1- p))
1141                           files)
1142               p (+ p 29 csize))))
1143     (goto-char (point-min))
1144     (let ((dash (concat "- --------  -----------  --------  "
1145                         (make-string maxlen ?-)
1146                         "\n")))
1147       (insert "M   Length  Date         Time      File\n"
1148               dash)
1149       (archive-summarize-files (nreverse visual))
1150       (insert dash
1151               (format "  %8d                         %d file%s"
1152                       totalsize
1153                       (length files)
1154                       (if (= 1 (length files)) "" "s"))
1155               "\n"))
1156     (apply 'vector (nreverse files))))
1157
1158 (defun archive-arc-rename-entry (archive newname descr)
1159   (if (string-match "[:\\\\/]" newname)
1160       (error "File names in arc files may not contain a path"))
1161   (if (> (length newname) 12)
1162       (error "File names in arc files are limited to 12 characters"))
1163   (let ((name (concat newname (substring "\0\0\0\0\0\0\0\0\0\0\0\0\0"
1164                                          (length newname))))
1165         buffer-read-only)
1166     (save-restriction
1167       (save-excursion
1168         (widen)
1169         (goto-char (+ archive-proper-file-start (aref descr 4) 2))
1170         (delete-char 13)
1171         (insert name)))))
1172 ;; -------------------------------------------------------------------------
1173 ;; Section: Lzh Archives
1174
1175 (defun archive-lzh-summarize ()
1176   (let ((p 1)
1177         (totalsize 0)
1178         (maxlen 8)
1179         files
1180         visual)
1181     (while (progn (goto-char p) (looking-at "..-l[hz][0-9]-"))
1182       (let* ((hsize   (char-after p))
1183              (csize   (archive-l-e (+ p 7) 4))
1184              (ucsize  (archive-l-e (+ p 11) 4))
1185              (modtime (archive-l-e (+ p 15) 2))
1186              (moddate (archive-l-e (+ p 17) 2))
1187              (fnlen   (char-after (+ p 21)))
1188              (efnname (buffer-substring (+ p 22) (+ p 22 fnlen)))
1189              (fiddle  (string= efnname (upcase efnname)))
1190              (ifnname (if fiddle (downcase efnname) efnname))
1191              (p2      (+ p 22 fnlen))
1192              (creator (if (>= (- hsize fnlen) 24) (char-after (+ p2 2)) 0))
1193              (mode    (if (= creator ?U) (archive-l-e (+ p2 8) 2) ?\666))
1194              (modestr (if mode (archive-int-to-mode mode) "??????????"))
1195              (uid     (if (= creator ?U) (archive-l-e (+ p2 10) 2)))
1196              (gid     (if (= creator ?U) (archive-l-e (+ p2 12) 2)))
1197              (text    (if archive-alternate-display
1198                           (format "  %8d  %5S  %5S  %s"
1199                                   ucsize
1200                                   (or uid "?")
1201                                   (or gid "?")
1202                                   ifnname)
1203                         (format "  %10s  %8d  %-11s  %-8s  %s"
1204                                 modestr
1205                                 ucsize
1206                                 (archive-dosdate moddate)
1207                                 (archive-dostime modtime)
1208                                 ifnname))))
1209         (setq maxlen (max maxlen fnlen)
1210               totalsize (+ totalsize ucsize)
1211               visual (cons (vector text
1212                                    (- (length text) (length ifnname))
1213                                    (length text))
1214                            visual)
1215               files (cons (vector efnname ifnname fiddle mode (1- p))
1216                           files)
1217               p (+ p hsize 2 csize))))
1218     (goto-char (point-min))
1219     (let ((dash (concat (if archive-alternate-display
1220                             "- --------  -----  -----  "
1221                           "- ----------  --------  -----------  --------  ")
1222                         (make-string maxlen ?-)
1223                         "\n"))
1224           (header (if archive-alternate-display
1225                        "M   Length    Uid    Gid  File\n"
1226                     "M   Filemode    Length  Date         Time      File\n"))
1227           (sumline (if archive-alternate-display
1228                        "  %8d                %d file%s"
1229                      "              %8d                         %d file%s")))
1230       (insert header dash)
1231       (archive-summarize-files (nreverse visual))
1232       (insert dash
1233               (format sumline
1234                       totalsize
1235                       (length files)
1236                       (if (= 1 (length files)) "" "s"))
1237               "\n"))
1238     (apply 'vector (nreverse files))))
1239
1240 (defconst archive-lzh-alternate-display t)
1241
1242 (defun archive-lzh-extract (archive name)
1243   (archive-extract-by-stdout archive name archive-lzh-extract))
1244
1245 (defun archive-lzh-resum (p count)
1246   (let ((sum 0))
1247     (while (> count 0)
1248       (setq count (1- count)
1249             sum (+ sum (char-after p))
1250             p (1+ p)))
1251     (logand sum 255)))
1252
1253 (defun archive-lzh-rename-entry (archive newname descr)
1254   (save-restriction
1255     (save-excursion
1256       (widen)
1257       (let* ((p        (+ archive-proper-file-start (aref descr 4)))
1258              (oldhsize (char-after p))
1259              (oldfnlen (char-after (+ p 21)))
1260              (newfnlen (length newname))
1261              (newhsize (+ oldhsize newfnlen (- oldfnlen)))
1262              buffer-read-only)
1263         (if (> newhsize 255)
1264             (error "The file name is too long"))
1265         (goto-char (+ p 21))
1266         (delete-char (1+ oldfnlen))
1267         (insert newfnlen newname)
1268         (goto-char p)
1269         (delete-char 2)
1270         (insert newhsize (archive-lzh-resum p newhsize))))))
1271
1272 (defun archive-lzh-ogm (newval files errtxt ofs)
1273   (save-restriction
1274     (save-excursion
1275       (widen)
1276       (while files
1277         (let* ((fil (car files))
1278                (p (+ archive-proper-file-start (aref fil 4)))
1279                (hsize   (char-after p))
1280                (fnlen   (char-after (+ p 21)))
1281                (p2      (+ p 22 fnlen))
1282                (creator (if (>= (- hsize fnlen) 24) (char-after (+ p2 2)) 0))
1283                buffer-read-only)
1284           (if (= creator ?U)
1285               (progn
1286                 (or (numberp newval)
1287                     (setq newval (funcall newval (archive-l-e (+ p2 ofs) 2))))
1288                 (goto-char (+ p2 ofs))
1289                 (delete-char 2)
1290                 (insert (logand newval 255) (lsh newval -8))
1291                 (goto-char (1+ p))
1292                 (delete-char 1)
1293                 (insert (archive-lzh-resum (1+ p) hsize)))
1294             (message "Member %s does not have %s field"
1295                      (aref fil 1) errtxt)))
1296         (setq files (cdr files))))))
1297
1298 (defun archive-lzh-chown-entry (newuid files)
1299   (archive-lzh-ogm newuid files "an uid" 10))
1300
1301 (defun archive-lzh-chgrp-entry (newgid files)
1302   (archive-lzh-ogm newgid files "a gid" 12))
1303
1304 (defun archive-lzh-chmod-entry (newmode files)
1305   (archive-lzh-ogm
1306    ;; This should work even though newmode will be dynamically accessed.
1307    (function (lambda (old) (archive-calc-mode old newmode t)))
1308    files "a unix-style mode" 8))
1309 ;; -------------------------------------------------------------------------
1310 ;; Section: Zip Archives
1311
1312 (defun archive-zip-summarize ()
1313   (goto-char (- (point-max) (- 22 18)))
1314   (search-backward-regexp "[P]K\005\006")
1315   (let ((p (1+ (archive-l-e (+ (point) 16) 4)))
1316         (maxlen 8)
1317         (totalsize 0)
1318         files
1319         visual)
1320     (while (string= "PK\001\002" (buffer-substring p (+ p 4)))
1321       (let* ((creator (char-after (+ p 5)))
1322              (method  (archive-l-e (+ p 10) 2))
1323              (modtime (archive-l-e (+ p 12) 2))
1324              (moddate (archive-l-e (+ p 14) 2))
1325              (ucsize  (archive-l-e (+ p 24) 4))
1326              (fnlen   (archive-l-e (+ p 28) 2))
1327              (exlen   (archive-l-e (+ p 30) 2))
1328              (fclen   (archive-l-e (+ p 32) 2))
1329              (lheader (archive-l-e (+ p 42) 4))
1330              (efnname (buffer-substring (+ p 46) (+ p 46 fnlen)))
1331              (isdir   (and (= ucsize 0)
1332                            (string= (file-name-nondirectory efnname) "")))
1333              (mode    (cond ((memq creator '(2 3)) ; Unix + VMS
1334                              (archive-l-e (+ p 40) 2))
1335                             ((memq creator '(0 5 6 7 10 11)) ; Dos etc.
1336                              (logior ?\444
1337                                      (if isdir (logior 16384 ?\111) 0)
1338                                      (if (zerop
1339                                           (logand 1 (char-after (+ p 38))))
1340                                          ?\222 0)))
1341                             (t nil)))
1342              (modestr (if mode (archive-int-to-mode mode) "??????????"))
1343              (fiddle  (and archive-zip-case-fiddle
1344                            (not (not (memq creator '(0 2 4 5 9))))))
1345              (ifnname (if fiddle (downcase efnname) efnname))
1346              (text    (format "  %10s  %8d  %-11s  %-8s  %s"
1347                               modestr
1348                               ucsize
1349                               (archive-dosdate moddate)
1350                               (archive-dostime modtime)
1351                               ifnname)))
1352         (setq maxlen (max maxlen fnlen)
1353               totalsize (+ totalsize ucsize)
1354               visual (cons (vector text
1355                                    (- (length text) (length ifnname))
1356                                    (length text))
1357                            visual)
1358               files (cons (if isdir
1359                               nil
1360                             (vector efnname ifnname fiddle mode
1361                                     (list (1- p) lheader)))
1362                           files)
1363               p (+ p 46 fnlen exlen fclen))))
1364     (goto-char (point-min))
1365     (let ((dash (concat "- ----------  --------  -----------  --------  "
1366                         (make-string maxlen ?-)
1367                         "\n")))
1368       (insert "M Filemode      Length  Date         Time      File\n"
1369               dash)
1370       (archive-summarize-files (nreverse visual))
1371       (insert dash
1372               (format "              %8d                         %d file%s"
1373                       totalsize
1374                       (length files)
1375                       (if (= 1 (length files)) "" "s"))
1376               "\n"))
1377     (apply 'vector (nreverse files))))
1378
1379 (defun archive-zip-extract (archive name)
1380   (if archive-zip-use-pkzip
1381       (archive-*-extract archive name archive-zip-extract)
1382     (archive-extract-by-stdout archive name archive-zip-extract)))
1383
1384 (defun archive-zip-write-file-member (archive descr)
1385   (archive-*-write-file-member
1386    archive
1387    descr
1388    (if (aref descr 2) archive-zip-update-case archive-zip-update)))
1389
1390 (defun archive-zip-chmod-entry (newmode files)
1391   (save-restriction
1392     (save-excursion
1393       (widen)
1394       (while files
1395         (let* ((fil (car files))
1396                (p (+ archive-proper-file-start (car (aref fil 4))))
1397                (creator (char-after (+ p 5)))
1398                (oldmode (aref fil 3))
1399                (newval  (archive-calc-mode oldmode newmode t))
1400                buffer-read-only)
1401           (cond ((memq creator '(2 3)) ; Unix + VMS
1402                  (goto-char (+ p 40))
1403                  (delete-char 2)
1404                  (insert (logand newval 255) (lsh newval -8)))
1405                 ((memq creator '(0 5 6 7 10 11)) ; Dos etc.
1406                  (goto-char (+ p 38))
1407                  (insert (logior (logand (char-after (point)) 254)
1408                                  (logand (logxor 1 (lsh newval -7)) 1)))
1409                  (delete-char 1))
1410                 (t (message "Don't know how to change mode for this member"))))
1411         (setq files (cdr files))))))
1412 ;; -------------------------------------------------------------------------
1413 ;; Section: Zoo Archives
1414
1415 (defun archive-zoo-summarize ()
1416   (let ((p (1+ (archive-l-e 25 4)))
1417         (maxlen 8)
1418         (totalsize 0)
1419         files
1420         visual)
1421     (while (and (string= "\334\247\304\375" (buffer-substring p (+ p 4)))
1422                 (> (archive-l-e (+ p 6) 4) 0))
1423       (let* ((next    (1+ (archive-l-e (+ p 6) 4)))
1424              (moddate (archive-l-e (+ p 14) 2))
1425              (modtime (archive-l-e (+ p 16) 2))
1426              (ucsize  (archive-l-e (+ p 20) 4))
1427              (namefld (buffer-substring (+ p 38) (+ p 38 13)))
1428              (dirtype (char-after (+ p 4)))
1429              (lfnlen  (if (= dirtype 2) (char-after (+ p 56)) 0))
1430              (ldirlen (if (= dirtype 2) (char-after (+ p 57)) 0))
1431              (fnlen   (+ ldirlen
1432                          (if (> lfnlen 0)
1433                              (1- lfnlen)
1434                            (or (string-match "\0" namefld) 13))))
1435              (efnname (concat
1436                        (if (> ldirlen 0)
1437                            (concat (buffer-substring
1438                                     (+ p 58 lfnlen) (+ p 58 lfnlen ldirlen -1))
1439                                    "/")
1440                          "")
1441                        (if (> lfnlen 0)
1442                            (buffer-substring (+ p 58) (+ p 58 lfnlen -1))
1443                          (substring namefld 0 fnlen))))
1444              (fiddle  (and (= lfnlen 0) (string= efnname (upcase efnname))))
1445              (ifnname (if fiddle (downcase efnname) efnname))
1446              (text    (format "  %8d  %-11s  %-8s  %s"
1447                               ucsize
1448                               (archive-dosdate moddate)
1449                               (archive-dostime modtime)
1450                               ifnname)))
1451         (setq maxlen (max maxlen fnlen)
1452               totalsize (+ totalsize ucsize)
1453               visual (cons (vector text
1454                                    (- (length text) (length ifnname))
1455                                    (length text))
1456                            visual)
1457               files (cons (vector efnname ifnname fiddle nil (1- p))
1458                           files)
1459               p next)))
1460     (goto-char (point-min))
1461     (let ((dash (concat "- --------  -----------  --------  "
1462                         (make-string maxlen ?-)
1463                         "\n")))
1464       (insert "M   Length  Date         Time      File\n"
1465               dash)
1466       (archive-summarize-files (nreverse visual))
1467       (insert dash
1468               (format "  %8d                         %d file%s"
1469                       totalsize
1470                       (length files)
1471                       (if (= 1 (length files)) "" "s"))
1472               "\n"))
1473     (apply 'vector (nreverse files))))
1474
1475 (defun archive-zoo-extract (archive name)
1476   (archive-extract-by-stdout archive name archive-zoo-extract))
1477 ;; -------------------------------------------------------------------------
1478 (provide 'archive-mode)
1479
1480 ;; arc-mode.el ends here.