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
  23 ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  24
  25 ;;; Commentary:
  26 ;;
  27 ;; NAMING: "arc" is short for "archive" and does not refer specifically
  28 ;; to files whose name end in ".arc"
  29 ;;
  30 ;; This code does not decode any files internally, although it does
  31 ;; understand the directory level of the archives.  For this reason,
  32 ;; you should expect this code to need more fiddling than tar-mode.el
  33 ;; (although it at present has fewer bugs :-)  In particular, I have
  34 ;; not tested this under Ms-Dog myself.
  35 ;; -------------------------------------
  36 ;; INTERACTION: arc-mode.el should play together with
  37 ;;
  38 ;; * ange-ftp.el: Remote archives (i.e., ones that ange-ftp has brought
  39 ;;                to you) are handled by doing all updates on a local
  40 ;;                copy.  When you make changes to a remote file the
  41 ;;                changes will first take effect when the archive buffer
  42 ;;                is saved.  You will be warned about this.
  43 ;;
  44 ;; * dos-fns.el:  (Part of Emacs 19).  You get automatic ^M^J <--> ^J
  45 ;;                conversion.
  46 ;;
  47 ;; arc-mode.el does not work well with crypt++.el; for the archives as
  48 ;; such this could be fixed (but wouldn't be useful) by declaring such
  49 ;; archives to be "remote".  For the members this is a general Emacs
  50 ;; problem that 19.29's file formats may fix.
  51 ;; -------------------------------------
  52 ;; ARCHIVE TYPES: Currently only the archives below are handled, but the
  53 ;; structure for handling just about anything is in place.
  54 ;;
  55 ;;                        Arc     Lzh     Zip     Zoo
  56 ;;                        --------------------------------
  57 ;; View listing           Intern  Intern  Intern  Intern
  58 ;; Extract member         Y       Y       Y       Y
  59 ;; Save changed member    Y       Y       Y       Y
  60 ;; Add new member         N       N       N       N
  61 ;; Delete member          Y       Y       Y       Y
  62 ;; Rename member          Y       Y       N       N
  63 ;; Chmod                  -       Y       Y       -
  64 ;; Chown                  -       Y       -       -
  65 ;; Chgrp                  -       Y       -       -
  66 ;;
  67 ;; Special thanks to Bill Brodie <wbrodie@panix.com> for very useful tips
  68 ;; on the first released version of this package.
  69 ;;
  70 ;; This code is partly based on tar-mode.el from Emacs.
  71 ;; -------------------------------------
  72 ;; ARCHIVE STRUCTURES:
  73 ;; (This is mostly for myself.)
  74 ;;
  75 ;; ARC         A series of (header,file).  No interactions among members.
  76 ;;
  77 ;; LZH         A series of (header,file).  Headers are checksummed.  No
  78 ;;             interaction among members.
  79 ;;
  80 ;; ZIP         A series of (lheader,fil) followed by a "central directory"
  81 ;;             which is a series of (cheader) followed by an end-of-
  82 ;;             central-dir record possibly followed by junk.  The e-o-c-d
  83 ;;             links to c-d.  cheaders link to lheaders which are basically
  84 ;;             cut-down versions of the cheaders.
  85 ;;
  86 ;; ZOO         An archive header followed by a series of (header,file).
  87 ;;             Each member header points to the next.  The archive is
  88 ;;             terminated by a bogus header with a zero next link.
  89 ;; -------------------------------------
  90 ;; HOOKS: `foo' means one the the supported archive types.
  91 ;;
  92 ;; archive-mode-hook
  93 ;; archive-foo-mode-hook
  94 ;; archive-extract-hooks
  95
  96 ;;; Code:
  97
  98 ;; -------------------------------------------------------------------------
  99 ;; Section: Configuration.
 100
 101 (defvar archive-dos-members t
 102   "*If non-nil then recognize member files using ^M^J as line terminator
 103 and do The Right Thing.")
 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 (i.e., are
 113 not proper file names outside Emacs).  A local copy a the archive will
 114 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 to the current directory.  Archive and member name will be added.")
 127
 128 (defvar archive-arc-expunge
 129   '("arc" "d")
 130   "*Program and its options to run in order to delete arc file members.
 131 Archive and member names will be added.")
 132
 133 (defvar archive-arc-write-file-member
 134   '("arc" "u")
 135   "*Program and its options to run in order to update an arc file member.
 136 Archive and member name will be added.")
 137 ;; ------------------------------
 138 ;; Lzh archive configuration
 139
 140 (defvar archive-lzh-extract
 141   '("lha" "pq")
 142   "*Program and its options to run in order to extract an lzh file member
 143 to standard output.  Archive and member name will be added.")
 144
 145 (defvar archive-lzh-expunge
 146   '("lha" "d")
 147   "*Program and its options to run in order to delete lzh file members.
 148 Archive and member names will be added.")
 149
 150 (defvar archive-lzh-write-file-member
 151   '("lha" "a")
 152   "*Program and its options to run in order to update an lzh file member.
 153 Archive and member name will be added.")
 154 ;; ------------------------------
 155 ;; Zip archive configuration
 156
 157 (defvar archive-zip-use-pkzip (memq system-type '(ms-dos windows-nt))
 158   "*If non-nil then all zip options default to values suitable when using
 159 pkzip and pkunzip.  Only set to true for msdog systems!")
 160
 161 (defvar archive-zip-extract
 162   (if archive-zip-use-pkzip '("pkunzip" "-e") '("unzip" "-qq" "-c"))
 163   "*Program and its options to run in order to extract a zip file member
 164 to standard output.  Archive and member name will be added.\n
 165 If `archive-zip-use-pkzip' is non-nil then this program is expected to
 166 extract to a file junking the directory part of the name.")
 167
 168 ;; For several reasons the latter behaviour is not desireable in general.
 169 ;; (1) It uses more disk space.  (2) Error checking is worse or non-
 170 ;; existent.  (3) It tends to do funny things with other systems' file
 171 ;; names.
 172
 173 (defvar archive-zip-expunge
 174   (if archive-zip-use-pkzip '("pkzip" "-d") '("zip" "-d" "-q"))
 175   "*Program and its options to run in order to delete zip file members.
 176 Archive and member names will be added.")
 177
 178 (defvar archive-zip-update
 179   (if archive-zip-use-pkzip '("pkzip" "-u") '("zip" "-q"))
 180   "*Program and its options to run in order to update a zip file member.
 181 Options should ensure that specified directory will be put into the zip
 182 file.  Archive and member name will be added.")
 183
 184 (defvar archive-zip-update-case
 185   (if archive-zip-use-pkzip archive-zip-update '("zip" "-q" "-k"))
 186   "*Program and its options to run in order to update a case fiddled
 187 zip file member.  Options should ensure that specified directory will
 188 be put into the zip file.  Archive and member name will be added.")
 189
 190 (defvar archive-zip-case-fiddle t
 191   "*If non-nil then zip file members are mapped to lower case if created
 192 by a system that under single case file names.")
 193 ;; ------------------------------
 194 ;; Zoo archive configuration
 195
 196 (defvar archive-zoo-extract
 197   '("zoo" "xpq")
 198   "*Program and its options to run in order to extract a zoo file member
 199 to standard output.  Archive and member name will be added.")
 200
 201 (defvar archive-zoo-expunge
 202   '("zoo" "DqPP")
 203   "*Program and its options to run in order to delete zoo file members.
 204 Archive and member names will be added.")
 205
 206 (defvar archive-zoo-write-file-member
 207   '("zoo" "a")
 208   "*Program and its options to run in order to update a zoo file member.
 209 Archive and member name will be added.")
 210 ;; -------------------------------------------------------------------------
 211 ;; Section: Variables
 212
 213 (defvar archive-subtype nil "*Symbol describing archive type.")
 214 (defvar archive-file-list-start nil "*Position of first contents line.")
 215 (defvar archive-file-list-end nil "*Position just after last contents line.")
 216 (defvar archive-proper-file-start nil "*Position of real archive's start.")
 217 (defvar archive-read-only nil "*Non-nil if the archive is read-only on disk.")
 218 (defvar archive-remote nil "*Non-nil if the archive is outside file system.")
 219 (defvar archive-local-name nil "*Name of local copy of remote archive.")
 220 (defvar archive-mode-map nil "*Local keymap for archive mode listings.")
 221 (defvar archive-file-name-indent nil "*Column where file names start.")
 222
 223 (defvar archive-alternate-display nil
 224   "*Non-nil when alternate information is shown.")
 225 (make-variable-buffer-local 'archive-alternate-display)
 226 (put 'archive-alternate-display 'permanent-local t)
 227
 228 (defvar archive-superior-buffer nil "*In archive members, points to archive.")
 229 (put 'archive-superior-buffer 'permanent-local t)
 230
 231 (defvar archive-subfile-mode nil "*Non-nil in archive member buffers.")
 232 (make-variable-buffer-local 'archive-subfile-mode)
 233 (put 'archive-subfile-mode 'permanent-local t)
 234
 235 ;; buffer-file-type is a per-buffer variable in the msdog configuration
 236 (if (boundp 'buffer-file-type) nil
 237   (defvar buffer-file-type nil
 238     "*Nil for dos-style text file, non-nil otherwise.")
 239   (make-variable-buffer-local 'buffer-file-type)
 240   (put 'buffer-file-type 'permanent-local t)
 241   (setq-default buffer-file-type nil))
 242
 243 (defvar archive-subfile-dos nil
 244   "Negation of `buffer-file-type' which see.")
 245 (make-variable-buffer-local 'archive-subfile-dos)
 246 (put 'archive-subfile-dos 'permanent-local t)
 247
 248 (defvar archive-files nil "Vector of file descriptors.  Each descriptor is
 249 a vector of [ext-file-name int-file-name case-fiddled mode ...]")
 250 (make-variable-buffer-local 'archive-files)
 251
 252 (defvar archive-lemacs
 253   (string-match "\\(Lucid\\|Xemacs\\)" emacs-version)
 254   "*Non-nil when running under under Lucid Emacs or Xemacs.")
 255 ;; -------------------------------------------------------------------------
 256 ;; Section: Support functions.
 257
 258 (defsubst archive-name (suffix)
 259   (intern (concat "archive-" (symbol-name archive-subtype) "-" suffix)))
 260
 261 (defun archive-l-e (str &optional len)
 262   "Convert little endian string/vector to integer.  Alternatively, first
 263 argument may be a buffer position in the current buffer in which case a
 264 second arguemnt, length, should be supplied."
 265   (if (stringp str)
 266       (setq len (length str))
 267     (setq str (buffer-substring str (+ str len))))
 268   (let ((result 0)
 269         (i 0))
 270     (while (< i len)
 271       (setq i (1+ i)
 272             result (+ (ash result 8) (aref str (- len i)))))
 273     result))
 274
 275 (defun archive-int-to-mode (mode)
 276   "Turn an integer like 0700 (i.e., 448) into a mode string like -rwx------"
 277   (let ((str (make-string 10 ?-)))
 278     (or (zerop (logand 16384 mode)) (aset str 0 ?d))
 279     (or (zerop (logand  8192 mode)) (aset str 0 ?c)) ; completeness
 280     (or (zerop (logand   256 mode)) (aset str 1 ?r))
 281     (or (zerop (logand   128 mode)) (aset str 2 ?w))
 282     (or (zerop (logand    64 mode)) (aset str 3 ?x))
 283     (or (zerop (logand    32 mode)) (aset str 4 ?r))
 284     (or (zerop (logand    16 mode)) (aset str 5 ?w))
 285     (or (zerop (logand     8 mode)) (aset str 6 ?x))
 286     (or (zerop (logand     4 mode)) (aset str 7 ?r))
 287     (or (zerop (logand     2 mode)) (aset str 8 ?w))
 288     (or (zerop (logand     1 mode)) (aset str 9 ?x))
 289     (or (zerop (logand  1024 mode)) (aset str 3 (if (zerop (logand 64 mode))
 290                                                     ?S ?s)))
 291     (or (zerop (logand  2048 mode)) (aset str 6 (if (zerop (logand  8 mode))
 292                                                     ?S ?s)))
 293     str))
 294
 295 (defun archive-calc-mode (oldmode newmode &optional error)
 296   "From the integer OLDMODE and the string NEWMODE calculate a new file
 297 mode.\n
 298 NEWMODE may be an octal number including a leading zero in which case it
 299 will become the new mode.\n
 300 NEWMODE may also be a relative specification like \"og-rwx\" in which case
 301 OLDMODE will be modified accordingly just like chmod(2) would have done.\n
 302 If optional third argument ERROR is non-nil an error will be signaled if
 303 the mode is invalid.  If ERROR is nil then nil will be returned."
 304   (cond ((string-match "^0[0-7]*$" newmode)
 305          (let ((result 0)
 306                (len (length newmode))
 307                (i 1))
 308            (while (< i len)
 309              (setq result (+ (lsh result 3) (aref newmode i) (- ?0))
 310                    i (1+ i)))
 311            (logior (logand oldmode 65024) result)))
 312         ((string-match "^\\([agou]+\\)\\([---+=]\\)\\([rwxst]+\\)$" newmode)
 313          (let ((who 0)
 314                (result oldmode)
 315                (op (aref newmode (match-beginning 2)))
 316                (bits 0)
 317                (i (match-beginning 3)))
 318            (while (< i (match-end 3))
 319              (let ((rwx (aref newmode i)))
 320                (setq bits (logior bits (cond ((= rwx ?r)  292)
 321                                              ((= rwx ?w)  146)
 322                                              ((= rwx ?x)   73)
 323                                              ((= rwx ?s) 3072)
 324                                              ((= rwx ?t)  512)))
 325                      i (1+ i))))
 326            (while (< who (match-end 1))
 327              (let* ((whoc (aref newmode who))
 328                     (whomask (cond ((= whoc ?a) 4095)
 329                                    ((= whoc ?u) 1472)
 330                                    ((= whoc ?g) 2104)
 331                                    ((= whoc ?o)    7))))
 332                (if (= op ?=)
 333                    (setq result (logand result (lognot whomask))))
 334                (if (= op ?-)
 335                    (setq result (logand result (lognot (logand whomask bits))))
 336                  (setq result (logior result (logand whomask bits)))))
 337              (setq who (1+ who)))
 338            result))
 339         (t
 340          (if error
 341              (error "Invalid mode specification: %s" newmode)))))
 342
 343 (defun archive-dosdate (date)
 344   "Stringify dos packed DATE record."
 345   (let ((year (+ 1980 (logand (ash date -9) 127)))
 346         (month (logand (ash date -5) 15))
 347         (day (logand date 31)))
 348     (if (or (> month 12) (< month 1))
 349         ""
 350       (format "%2d-%s-%d"
 351               day
 352               (aref ["Jan" "Feb" "Mar" "Apr" "May" "Jun"
 353                      "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"] (1- month))
 354               year))))
 355
 356 (defun archive-dostime (time)
 357   "Stringify dos packed TIME record."
 358   (let ((hour (logand (ash time -11) 31))
 359         (minute (logand (ash time -5) 53))
 360         (second (* 2 (logand time 31)))) ; 2 seconds resolution
 361     (format "%02d:%02d:%02d" hour minute second)))
 362
 363 ;;(defun archive-unixdate (low high)
 364 ;;  "Stringify unix (LOW HIGH) date."
 365 ;;  (let ((str (current-time-string (cons high low))))
 366 ;;    (format "%s-%s-%s"
 367 ;;          (substring str 8 9)
 368 ;;          (substring str 4 7)
 369 ;;          (substring str 20 24))))
 370
 371 ;;(defun archive-unixtime (low high)
 372 ;;  "Stringify unix (LOW HIGH) time."
 373 ;;  (let ((str (current-time-string (cons high low))))
 374 ;;    (substring str 11 19)))
 375
 376 (defun archive-get-lineno ()
 377   (if (>= (point) archive-file-list-start)
 378       (count-lines archive-file-list-start
 379                    (save-excursion (beginning-of-line) (point)))
 380     0))
 381
 382 (defun archive-get-descr (&optional noerror)
 383   "Return the descriptor vector for file at point.  Do not signal an error
 384 if optional second argument NOERROR is non-nil."
 385   (let ((no (archive-get-lineno)))
 386     (if (and (>= (point) archive-file-list-start)
 387              (< no (length archive-files)))
 388         (let ((item (aref archive-files no)))
 389           (if (vectorp item)
 390               item
 391             (if (not noerror)
 392                 (error "Entry is not a regular member of the archive"))))
 393       (if (not noerror)
 394           (error "Line does not describe a member of the archive")))))
 395 ;; -------------------------------------------------------------------------
 396 ;; Section: the mode definition
 397
 398 ;;;###autoload
 399 (defun archive-mode (&optional force)
 400   "Major mode for viewing an archive file as a dired-like listing of its
 401 contents.  You can move around using the usual cursor motion commands.
 402 Letters no longer insert themselves.
 403 Type `e' to pull a file out of the archive and into its own buffer;
 404 or click mouse-2 on the file's line in the archive mode buffer.
 405
 406 If you edit a sub-file of this archive (as with the `e' command) and
 407 save it, the contents of that buffer will be saved back into the
 408 archive.
 409
 410 \\{archive-mode-map}"
 411   ;; This is not interactive because you shouldn't be turning this
 412   ;; mode on and off.  You can corrupt things that way.
 413   (if (zerop (buffer-size))
 414       ;; At present we cannot create archives from scratch
 415       (funcall default-major-mode)
 416     (if (and (not force) archive-files) nil
 417       (let* ((type (archive-find-type))
 418              (typename (copy-sequence (symbol-name type))))
 419         (aset typename 0 (upcase (aref typename 0)))
 420         (kill-all-local-variables)
 421         (make-local-variable 'archive-subtype)
 422         (setq archive-subtype type)
 423
 424         ;; Buffer contains treated image of file before the file contents
 425         (make-local-variable 'revert-buffer-function)
 426         (setq revert-buffer-function 'archive-mode-revert)
 427         (auto-save-mode 0)
 428         (make-local-variable 'local-write-file-hooks)
 429         (add-hook 'local-write-file-hooks 'archive-write-file)
 430
 431         ;; Real file contents is binary
 432         (make-local-variable 'require-final-newline)
 433         (setq require-final-newline nil)
 434         (make-local-variable 'enable-local-variables)
 435         (setq enable-local-variables nil)
 436         (setq buffer-file-type t)
 437
 438         (make-local-variable 'archive-read-only)
 439         (setq archive-read-only (not (file-writable-p (buffer-file-name))))
 440
 441         ;; Should we use a local copy when accessing from outside Emacs?
 442         (make-local-variable 'archive-local-name)
 443         (make-local-variable 'archive-remote)
 444         (setq archive-remote (string-match archive-remote-regexp
 445                                            (buffer-file-name)))
 446
 447         (setq major-mode 'archive-mode)
 448         (setq mode-name (concat typename "-Archive"))
 449         ;; Run archive-foo-mode-hook and archive-mode-hook
 450         (run-hooks (archive-name "mode-hook") 'archive-mode-hook)
 451         (use-local-map archive-mode-map))
 452
 453       (make-local-variable 'archive-proper-file-start)
 454       (make-local-variable 'archive-file-list-start)
 455       (make-local-variable 'archive-file-list-end)
 456       (make-local-variable 'archive-file-name-indent)
 457       (archive-summarize)
 458       (setq buffer-read-only t))))
 459
 460 ;; Archive mode is suitable only for specially formatted data.
 461 (put 'archive-mode 'mode-class 'special)
 462 ;; -------------------------------------------------------------------------
 463 ;; Section: Key maps
 464
 465 (if archive-mode-map nil
 466   (setq archive-mode-map (make-keymap))
 467   (suppress-keymap archive-mode-map)
 468   (define-key archive-mode-map " " 'archive-next-line)
 469   (define-key archive-mode-map "a" 'archive-alternate-display)
 470   ;;(define-key archive-mode-map "c" 'archive-copy)
 471   (define-key archive-mode-map "d" 'archive-flag-deleted)
 472   (define-key archive-mode-map "\C-d" 'archive-flag-deleted)
 473   (define-key archive-mode-map "e" 'archive-extract)
 474   (define-key archive-mode-map "f" 'archive-extract)
 475   (define-key archive-mode-map "\C-m" 'archive-extract)
 476   (define-key archive-mode-map "g" 'revert-buffer)
 477   (define-key archive-mode-map "h" 'describe-mode)
 478   (define-key archive-mode-map "m" 'archive-mark)
 479   (define-key archive-mode-map "n" 'archive-next-line)
 480   (define-key archive-mode-map "\C-n" 'archive-next-line)
 481   (define-key archive-mode-map [down] 'archive-next-line)
 482   (define-key archive-mode-map "o" 'archive-extract-other-window)
 483   (define-key archive-mode-map "p" 'archive-previous-line)
 484   (define-key archive-mode-map "\C-p" 'archive-previous-line)
 485   (define-key archive-mode-map [up] 'archive-previous-line)
 486   (define-key archive-mode-map "r" 'archive-rename-entry)
 487   (define-key archive-mode-map "u" 'archive-unflag)
 488   (define-key archive-mode-map "\M-\C-?" 'archive-unmark-all-files)
 489   (define-key archive-mode-map "v" 'archive-view)
 490   (define-key archive-mode-map "x" 'archive-expunge)
 491   (define-key archive-mode-map "\177" 'archive-unflag-backwards)
 492   (define-key archive-mode-map "E" 'archive-extract-other-window)
 493   (define-key archive-mode-map "M" 'archive-chmod-entry)
 494   (define-key archive-mode-map "G" 'archive-chgrp-entry)
 495   (define-key archive-mode-map "O" 'archive-chown-entry)
 496
 497   (if archive-lemacs
 498       (progn
 499         ;; Not a nice "solution" but it'll have to do
 500         (define-key archive-mode-map "\C-xu" 'archive-undo)
 501         (define-key archive-mode-map "\C-_" 'archive-undo))
 502     (substitute-key-definition 'undo 'archive-undo
 503                                archive-mode-map global-map))
 504
 505   (define-key archive-mode-map
 506     (if archive-lemacs 'button2 [mouse-2]) 'archive-mouse-extract)
 507
 508   (if archive-lemacs
 509       ()                                ; out of luck
 510     ;; Get rid of the Edit menu bar item to save space.
 511     (define-key archive-mode-map [menu-bar edit] 'undefined)
 512
 513     (define-key archive-mode-map [menu-bar immediate]
 514       (cons "Immediate" (make-sparse-keymap "Immediate")))
 515     (define-key archive-mode-map [menu-bar immediate alternate]
 516       '("Alternate Display" . archive-alternate-display))
 517     (put 'archive-alternate-display 'menu-enable
 518          '(boundp (archive-name "alternate-display")))
 519     (define-key archive-mode-map [menu-bar immediate view]
 520       '("View This File" . archive-view))
 521     (define-key archive-mode-map [menu-bar immediate display]
 522       '("Display in Other Window" . archive-display-other-window))
 523     (define-key archive-mode-map [menu-bar immediate find-file-other-window]
 524       '("Find in Other Window" . archive-extract-other-window))
 525     (define-key archive-mode-map [menu-bar immediate find-file]
 526       '("Find This File" . archive-extract))
 527
 528     (define-key archive-mode-map [menu-bar mark]
 529       (cons "Mark" (make-sparse-keymap "Mark")))
 530     (define-key archive-mode-map [menu-bar mark unmark-all]
 531       '("Unmark All" . archive-unmark-all-files))
 532     (define-key archive-mode-map [menu-bar mark deletion]
 533       '("Flag" . archive-flag-deleted))
 534     (define-key archive-mode-map [menu-bar mark unmark]
 535       '("Unflag" . archive-unflag))
 536     (define-key archive-mode-map [menu-bar mark mark]
 537       '("Mark" . archive-mark))
 538
 539     (define-key archive-mode-map [menu-bar operate]
 540       (cons "Operate" (make-sparse-keymap "Operate")))
 541     (define-key archive-mode-map [menu-bar operate chown]
 542       '("Change Owner..." . archive-chown-entry))
 543     (put 'archive-chown-entry 'menu-enable
 544          '(fboundp (archive-name "chown-entry")))
 545     (define-key archive-mode-map [menu-bar operate chgrp]
 546       '("Change Group..." . archive-chgrp-entry))
 547     (put 'archive-chgrp-entry 'menu-enable
 548          '(fboundp (archive-name "chgrp-entry")))
 549     (define-key archive-mode-map [menu-bar operate chmod]
 550       '("Change Mode..." . archive-chmod-entry))
 551     (put 'archive-chmod-entry 'menu-enable
 552          '(fboundp (archive-name "chmod-entry")))
 553     (define-key archive-mode-map [menu-bar operate rename]
 554       '("Rename to..." . archive-rename-entry))
 555     (put 'archive-rename-entry 'menu-enable
 556          '(fboundp (archive-name "rename-entry")))
 557     ;;(define-key archive-mode-map [menu-bar operate copy]
 558     ;;  '("Copy to..." . archive-copy))
 559     (define-key archive-mode-map [menu-bar operate expunge]
 560       '("Expunge Marked Files" . archive-expunge))
 561   ))
 562
 563 (let* ((item1 '(archive-subfile-mode " Archive"))
 564        (item2 '(archive-subfile-dos " Dos"))
 565        (items (if (memq system-type '(ms-dos windows-nt))
 566                   (list item1) ; msdog has its own indicator
 567                 (list item1 item2))))
 568   (or (member item1 minor-mode-alist)
 569       (setq minor-mode-alist (append items minor-mode-alist))))
 570 ;; -------------------------------------------------------------------------
 571 (defun archive-find-type ()
 572   (widen)
 573   (goto-char (point-min))
 574   ;; The funny [] here make it unlikely that the .elc file will be treated
 575   ;; as an archive by other software.
 576   (let (case-fold-search)
 577     (cond ((looking-at "[P]K\003\004") 'zip)
 578           ((looking-at "..-l[hz][0-9]-") 'lzh)
 579           ((looking-at "....................[\334]\247\304\375") 'zoo)
 580           ((and (looking-at "\C-z")     ; signature too simple, IMHO
 581                 (string-match "\\.[aA][rR][cC]$"
 582                               (or buffer-file-name (buffer-name))))
 583            'arc)
 584           (t (error "Buffer format not recognized.")))))
 585 ;; -------------------------------------------------------------------------
 586 (defun archive-summarize ()
 587   "Parse the contents of the archive file in the current buffer.
 588 Place a dired-like listing on the front;
 589 then narrow to it, so that only that listing
 590 is visible (and the real data of the buffer is hidden)."
 591   (widen)
 592   (let (buffer-read-only)
 593     (message "Parsing archive file...")
 594     (buffer-disable-undo (current-buffer))
 595     (setq archive-files (funcall (archive-name "summarize")))
 596     (message "Parsing archive file...done.")
 597     (setq archive-proper-file-start (point-marker))
 598     (narrow-to-region (point-min) (point))
 599     (set-buffer-modified-p nil)
 600     (buffer-enable-undo))
 601   (goto-char archive-file-list-start)
 602   (archive-next-line 0))
 603
 604 (defun archive-resummarize ()
 605   "Recreate the contents listing of an archive."
 606   (let ((modified (buffer-modified-p))
 607         (no (archive-get-lineno))
 608         buffer-read-only)
 609     (widen)
 610     (delete-region (point-min) archive-proper-file-start)
 611     (archive-summarize)
 612     (set-buffer-modified-p modified)
 613     (goto-char archive-file-list-start)
 614     (archive-next-line no)))
 615
 616 (defun archive-summarize-files (files)
 617   "Insert a desciption of a list of files annotated with proper mouse face"
 618   (setq archive-file-list-start (point-marker))
 619   (setq archive-file-name-indent (if files (aref (car files) 1) 0))
 620   ;; We don't want to do an insert for each element since that takes too
 621   ;; long when the archive -- which has to be moved in memory -- is large.
 622   (insert
 623    (apply
 624     (function concat)
 625     (mapcar
 626      (function
 627       (lambda (fil)
 628         ;; Using `concat' here copies the text also, so we can add
 629         ;; properties without problems.
 630         (let ((text (concat (aref fil 0) "\n")))
 631           (if archive-lemacs
 632               ()                        ; out of luck
 633             (put-text-property (aref fil 1) (aref fil 2)
 634                                'mouse-face 'highlight
 635                                text))
 636           text)))
 637      files)))
 638   (setq archive-file-list-end (point-marker)))
 639
 640 (defun archive-alternate-display ()
 641   "Toggle alternative display.  To avoid very long lines some archive mode
 642 don't show all information.  This function changes the set of information
 643 shown for each files."
 644   (interactive)
 645   (setq archive-alternate-display (not archive-alternate-display))
 646   (archive-resummarize))
 647 ;; -------------------------------------------------------------------------
 648 ;; Section: Local archive copy handling
 649
 650 (defun archive-maybe-copy (archive)
 651   (if archive-remote
 652       (let ((start (point-max)))
 653         (setq archive-local-name (expand-file-name
 654                                   (file-name-nondirectory archive)
 655                                   archive-tmpdir))
 656         (make-directory archive-tmpdir t)
 657         (save-restriction
 658           (widen)
 659           (write-region start (point-max) archive-local-name nil 'nomessage))
 660         archive-local-name)
 661     (if (buffer-modified-p) (save-buffer))
 662     archive))
 663
 664 (defun archive-maybe-update (unchanged)
 665   (if archive-remote
 666       (let ((name archive-local-name)
 667             (modified (buffer-modified-p))
 668             buffer-read-only)
 669         (if unchanged nil
 670           (erase-buffer)
 671           (insert-file-contents name)
 672           (archive-mode t))
 673         (archive-delete-local name)
 674         (if (not unchanged)
 675             (message "Archive file must be saved for changes to take effect"))
 676         (set-buffer-modified-p (or modified (not unchanged))))))
 677
 678 (defun archive-delete-local (name)
 679   "Delete (robust) the file NAME and its parents up to and including the
 680 value of `archive-tmpdir'."
 681   (let ((again t)
 682         (top (directory-file-name (file-name-as-directory archive-tmpdir))))
 683     (condition-case nil
 684         (delete-file name)
 685       (error nil))
 686     (while again
 687       (setq name (directory-file-name (file-name-directory name)))
 688       (condition-case nil
 689           (delete-directory name)
 690         (error nil))
 691       (if (string= name top) (setq again nil)))))
 692 ;; -------------------------------------------------------------------------
 693 ;; Section: Member extraction
 694
 695 (defun archive-mouse-extract (event)
 696   "Extract a file whose name you click on."
 697   (interactive "e")
 698   (mouse-set-point event)
 699   (switch-to-buffer
 700    (save-excursion
 701      (archive-extract)
 702      (current-buffer))))
 703
 704 (defun archive-extract (&optional other-window-p)
 705   "In archive mode, extract this entry of the archive into its own buffer."
 706   (interactive)
 707   (let* ((view-p (eq other-window-p 'view))
 708          (descr (archive-get-descr))
 709          (ename (aref descr 0))
 710          (iname (aref descr 1))
 711          (archive-buffer (current-buffer))
 712          (arcdir default-directory)
 713          (archive (buffer-file-name))
 714          (arcname (file-name-nondirectory archive))
 715          (bufname (concat (file-name-nondirectory iname) " (" arcname ")"))
 716          (extractor (archive-name "extract"))
 717          (read-only-p (or archive-read-only view-p))
 718          (buffer (get-buffer bufname))
 719          (just-created nil))
 720       (if buffer
 721           nil
 722         (setq archive (archive-maybe-copy archive))
 723         (setq buffer (get-buffer-create bufname))
 724         (setq just-created t)
 725         (save-excursion
 726           (set-buffer buffer)
 727           (setq buffer-file-name
 728                 (expand-file-name (concat arcname ":" iname)))
 729           (setq buffer-file-truename
 730                 (abbreviate-file-name buffer-file-name))
 731           ;; Set the default-directory to the dir of the superior buffer.
 732           (setq default-directory arcdir)
 733           (make-local-variable 'archive-superior-buffer)
 734           (setq archive-superior-buffer archive-buffer)
 735           (make-local-variable 'local-write-file-hooks)
 736           (add-hook 'local-write-file-hooks 'archive-write-file-member)
 737           (setq archive-subfile-mode descr)
 738           (setq archive-subfile-dos nil
 739                 buffer-file-type t)
 740           (if (fboundp extractor)
 741               (funcall extractor archive ename)
 742             (archive-*-extract archive ename (symbol-value extractor)))
 743           (if archive-dos-members (archive-check-dos))
 744           (goto-char (point-min))
 745           (rename-buffer bufname)
 746           (setq buffer-read-only read-only-p)
 747           (setq buffer-undo-list nil)
 748           (set-buffer-modified-p nil)
 749           (setq buffer-saved-size (buffer-size))
 750           (normal-mode)
 751           ;; Just in case an archive occurs inside another archive.
 752           (if (eq major-mode 'archive-mode)
 753               (setq archive-remote t))
 754           (run-hooks 'archive-extract-hooks))
 755         (archive-maybe-update t))
 756       (if view-p
 757           (progn
 758             (view-buffer buffer)
 759             (and just-created (setq view-exit-action 'kill-buffer)))
 760         (if (eq other-window-p 'display)
 761             (display-buffer buffer)
 762           (if other-window-p
 763               (switch-to-buffer-other-window buffer)
 764             (switch-to-buffer buffer))))))
 765
 766 (defun archive-*-extract (archive name command)
 767   (let* ((default-directory (file-name-as-directory archive-tmpdir))
 768          (tmpfile (expand-file-name (file-name-nondirectory name)
 769                                     default-directory)))
 770     (make-directory (directory-file-name default-directory) t)
 771     (apply 'call-process
 772            (car command)
 773            nil
 774            nil
 775            nil
 776            (append (cdr command) (list archive name)))
 777     (insert-file-contents tmpfile)
 778     (archive-delete-local tmpfile)))
 779
 780 (defun archive-extract-by-stdout (archive name command)
 781   (let ((binary-process-output t)) ; for Ms-Dos
 782     (apply 'call-process
 783            (car command)
 784            nil
 785            t
 786            nil
 787            (append (cdr command) (list archive name)))))
 788
 789 (defun archive-extract-other-window ()
 790   "In archive mode, find this member in another window."
 791   (interactive)
 792   (archive-extract t))
 793
 794 (defun archive-display-other-window ()
 795   "In archive mode, display this member in another window."
 796   (interactive)
 797   (archive-extract 'display))
 798
 799 (defun archive-view ()
 800   "In archive mode, view the member on this line."
 801   (interactive)
 802   (archive-extract 'view))
 803
 804 (defun archive-add-new-member (arcbuf name)
 805   "Add the file in the current buffer to the archive in ARCBUF naming it
 806 NAME."
 807   (interactive
 808    (list (get-buffer
 809           (read-buffer "Buffer containing archive: "
 810                        ;; Find first archive buffer and suggest that
 811                        (let ((bufs (buffer-list)))
 812                          (while (and bufs (not (eq (save-excursion
 813                                                      (set-buffer (car bufs))
 814                                                      major-mode)
 815                                                    'archive-mode)))
 816                            (setq bufs (cdr bufs)))
 817                          (if bufs
 818                              (car bufs)
 819                            (error "There are no archive buffers")))
 820                        t))
 821          (read-string "File name in archive: "
 822                       (if buffer-file-name
 823                           (file-name-nondirectory buffer-file-name)
 824                         ""))))
 825   (save-excursion
 826     (set-buffer arcbuf)
 827     (or (eq major-mode 'archive-mode)
 828         (error "Buffer is not an archive buffer"))
 829     (if archive-read-only
 830         (error "Archive is read-only")))
 831   (if (eq arcbuf (current-buffer))
 832       (error "An archive buffer cannot be added to itself"))
 833   (if (string= name "")
 834       (error "Archive members may not be given empty names"))
 835   (let ((func (save-excursion (set-buffer arcbuf)
 836                               (archive-name "add-new-member")))
 837         (membuf (current-buffer)))
 838     (if (fboundp func)
 839         (save-excursion
 840           (set-buffer arcbuf)
 841           (funcall func buffer-file-name membuf name))
 842       (error "Adding a new member is not supported for this archive type"))))
 843 ;; -------------------------------------------------------------------------
 844 ;; Section: IO stuff
 845
 846 (defun archive-check-dos (&optional force)
 847   "*If this looks like a buffer with ^M^J as line terminator then remove
 848 those ^Ms and set archive-subfile-dos."
 849   (save-restriction
 850     (widen)
 851     (save-excursion
 852       (goto-char (point-min))
 853       (setq archive-subfile-dos
 854             (or force (not (search-forward-regexp "[^\r]\n" nil t))))
 855       (setq buffer-file-type (not archive-subfile-dos))
 856       (if archive-subfile-dos
 857           (let ((modified (buffer-modified-p)))
 858             (buffer-disable-undo (current-buffer))
 859             (goto-char (point-min))
 860             (while (search-forward "\r\n" nil t)
 861               (replace-match "\n"))
 862             (buffer-enable-undo)
 863             (set-buffer-modified-p modified))))))
 864
 865 (defun archive-write-file-member ()
 866   (if archive-subfile-dos
 867       (save-restriction
 868         (widen)
 869         (save-excursion
 870           (goto-char (point-min))
 871           ;; We don't want our ^M^J <--> ^J changes to show in the undo list
 872           (let ((undo-list buffer-undo-list))
 873             (unwind-protect
 874                 (progn
 875                   (setq buffer-undo-list t)
 876                   (while (search-forward "\n" nil t)
 877                     (replace-match "\r\n"))
 878                   (setq archive-subfile-dos nil)
 879                   (setq buffer-file-type t)
 880                   ;; OK, we're now have explicit ^M^Js -- save and re-unixfy
 881                   (archive-write-file-member))
 882               (progn
 883                 (archive-check-dos t)
 884                 (setq buffer-undo-list undo-list))))
 885           t))
 886     (save-excursion
 887       (save-restriction
 888         (message "Updating archive...")
 889         (widen)
 890         (let ((writer  (save-excursion (set-buffer archive-superior-buffer)
 891                                        (archive-name "write-file-member")))
 892               (archive (save-excursion (set-buffer archive-superior-buffer)
 893                                        (buffer-file-name))))
 894           (if (fboundp writer)
 895               (funcall writer archive archive-subfile-mode)
 896             (archive-*-write-file-member archive
 897                                          archive-subfile-mode
 898                                          (symbol-value writer))))
 899         (set-buffer-modified-p nil)
 900         (message "Updating archive...done")
 901         (set-buffer archive-superior-buffer)
 902         (revert-buffer)
 903         t))))
 904
 905 (defun archive-*-write-file-member (archive descr command)
 906   (let* ((ename (aref descr 0))
 907          (tmpfile (expand-file-name ename archive-tmpdir))
 908          (top (directory-file-name (file-name-as-directory archive-tmpdir)))
 909          (default-directory (file-name-as-directory top)))
 910     (unwind-protect
 911         (progn
 912           (make-directory (file-name-directory tmpfile) t)
 913           (write-region (point-min) (point-max) tmpfile nil 'nomessage)
 914           (if (aref descr 3)
 915               ;; Set the file modes, but make sure we can read it.
 916               (set-file-modes tmpfile (logior ?\400 (aref descr 3))))
 917           (let ((exitcode (apply 'call-process
 918                                  (car command)
 919                                  nil
 920                                  nil
 921                                  nil
 922                                  (append (cdr command) (list archive ename)))))
 923             (if (equal exitcode 0)
 924                 nil
 925               (error "Updating was unsuccessful (%S)" exitcode))))
 926       (archive-delete-local tmpfile))))
 927
 928 (defun archive-write-file ()
 929   (save-excursion
 930     (write-region archive-proper-file-start (point-max) buffer-file-name nil t)
 931     (set-buffer-modified-p nil)
 932     t))
 933 ;; -------------------------------------------------------------------------
 934 ;; Section: Marking and unmarking.
 935
 936 (defun archive-flag-deleted (p &optional type)
 937   "In archive mode, mark this member to be deleted from the archive.
 938 With a prefix argument, mark that many files."
 939   (interactive "p")
 940   (or type (setq type ?D))
 941   (beginning-of-line)
 942   (let ((sign (if (>= p 0) +1 -1))
 943         (modified (buffer-modified-p))
 944         buffer-read-only)
 945     (while (not (zerop p))
 946       (if (archive-get-descr t)
 947           (progn
 948             (delete-char 1)
 949             (insert type)))
 950       (forward-line sign)
 951       (setq p (- p sign)))
 952     (set-buffer-modified-p modified))
 953   (archive-next-line 0))
 954
 955 (defun archive-unflag (p)
 956   "In archive mode, un-mark this member if it is marked to be deleted.
 957 With a prefix argument, un-mark that many files forward."
 958   (interactive "p")
 959   (archive-flag-deleted p ? ))
 960
 961 (defun archive-unflag-backwards (p)
 962   "In archive mode, un-mark this member if it is marked to be deleted.
 963 With a prefix argument, un-mark that many members backward."
 964   (interactive "p")
 965   (archive-flag-deleted (- p) ? ))
 966
 967 (defun archive-unmark-all-files ()
 968   "Remove all marks."
 969   (interactive)
 970   (let ((modified (buffer-modified-p))
 971         buffer-read-only)
 972     (save-excursion
 973       (goto-char archive-file-list-start)
 974       (while (< (point) archive-file-list-end)
 975         (or (= (following-char) ? )
 976             (progn (delete-char 1) (insert ? )))
 977         (forward-line 1)))
 978     (set-buffer-modified-p modified)))
 979
 980 (defun archive-mark (p)
 981   "In archive mode, mark this member for group operations.
 982 With a prefix argument, mark that many members.
 983 Use \\[archive-unmark-all-files] to remove all marks."
 984   (interactive "p")
 985   (archive-flag-deleted p ?*))
 986
 987 (defun archive-get-marked (mark &optional default)
 988   (let (files)
 989     (save-excursion
 990       (goto-char archive-file-list-start)
 991       (while (< (point) archive-file-list-end)
 992         (if (= (following-char) mark)
 993             (setq files (cons (archive-get-descr) files)))
 994         (forward-line 1)))
 995     (or (nreverse files)
 996         (and default
 997              (list (archive-get-descr))))))
 998 ;; -------------------------------------------------------------------------
 999 ;; Section: Operate
1000
1001 (defun archive-next-line (p)
1002   (interactive "p")
1003   (forward-line p)
1004   (or (eobp)
1005       (forward-char archive-file-name-indent)))
1006
1007 (defun archive-previous-line (p)
1008   (interactive "p")
1009   (archive-next-line (- p)))
1010
1011 (defun archive-chmod-entry (new-mode)
1012   "Change the protection bits associated with all marked or this member
1013 in the archive.\n\
1014 The new protection bits can either be specified as an octal number or
1015 as a relative change like \"g+rw\" as for chmod(2)"
1016   (interactive "sNew mode (octal or relative): ")
1017   (if archive-read-only (error "Archive is read-only"))
1018   (let ((func (archive-name "chmod-entry")))
1019     (if (fboundp func)
1020         (progn
1021           (funcall func new-mode (archive-get-marked ?* t))
1022           (archive-resummarize))
1023       (error "Setting mode bits is not supported for this archive type"))))
1024
1025 (defun archive-chown-entry (new-uid)
1026   "Change the owner of all marked or this member."
1027   (interactive "nNew uid: ")
1028   (if archive-read-only (error "Archive is read-only"))
1029   (let ((func (archive-name "chown-entry")))
1030     (if (fboundp func)
1031         (progn
1032           (funcall func new-uid (archive-get-marked ?* t))
1033           (archive-resummarize))
1034       (error "Setting owner is not supported for this archive type"))))
1035
1036 (defun archive-chgrp-entry (new-gid)
1037   "Change the group of all marked or this member."
1038   (interactive "nNew gid: ")
1039   (if archive-read-only (error "Archive is read-only"))
1040   (let ((func (archive-name "chgrp-entry")))
1041     (if (fboundp func)
1042         (progn
1043           (funcall func new-gid (archive-get-marked ?* t))
1044           (archive-resummarize))
1045       (error "Setting group is not supported for this archive type"))))
1046
1047 (defun archive-expunge ()
1048   "Do the flagged deletions."
1049   (interactive)
1050   (let (files)
1051     (save-excursion
1052       (goto-char archive-file-list-start)
1053       (while (< (point) archive-file-list-end)
1054         (if (= (following-char) ?D)
1055             (setq files (cons (aref (archive-get-descr) 0) files)))
1056         (forward-line 1)))
1057     (setq files (nreverse files))
1058     (and files
1059          (or (not archive-read-only)
1060              (error "Archive is read-only"))
1061          (or (yes-or-no-p (format "Really delete %d member%s? "
1062                                   (length files)
1063                                   (if (null (cdr files)) "" "s")))
1064              (error "Operation aborted"))
1065          (let ((archive (archive-maybe-copy (buffer-file-name)))
1066                (expunger (archive-name "expunge")))
1067            (if (fboundp expunger)
1068                (funcall expunger archive files)
1069              (archive-*-expunge archive files (symbol-value expunger)))
1070            (archive-maybe-update nil)
1071            (if archive-remote
1072                (archive-resummarize)
1073              (revert-buffer))))))
1074
1075 (defun archive-*-expunge (archive files command)
1076   (apply 'call-process
1077          (car command)
1078          nil
1079          nil
1080          nil
1081          (append (cdr command) (cons archive files))))
1082
1083 (defun archive-rename-entry (newname)
1084   "Change the name associated with this entry in the tar file."
1085   (interactive "sNew name: ")
1086   (if archive-read-only (error "Archive is read-only"))
1087   (if (string= newname "")
1088       (error "Archive members may not be given empty names"))
1089   (let ((func (archive-name "rename-entry"))
1090         (descr (archive-get-descr)))
1091     (if (fboundp func)
1092         (progn
1093           (funcall func (buffer-file-name) newname descr)
1094           (archive-resummarize))
1095       (error "Renaming is not supported for this archive type"))))
1096
1097 ;; Revert the buffer and recompute the dired-like listing.
1098 (defun archive-mode-revert (&optional no-autosave no-confirm)
1099   (let ((no (archive-get-lineno)))
1100     (setq archive-files nil)
1101     (let ((revert-buffer-function nil))
1102       (revert-buffer t t))
1103     (archive-mode)
1104     (goto-char archive-file-list-start)
1105     (archive-next-line no)))
1106
1107 (defun archive-undo ()
1108   "Undo in an archive buffer.
1109 This doesn't recover lost files, it just undoes changes in the buffer itself."
1110   (interactive)
1111   (let (buffer-read-only)
1112     (undo)))
1113 ;; -------------------------------------------------------------------------
1114 ;; Section: Arc Archives
1115
1116 (defun archive-arc-summarize ()
1117   (let ((p 1)
1118         (totalsize 0)
1119         (maxlen 8)
1120         files
1121         visual)
1122     (while (and (< (+ p 29) (point-max))
1123                 (= (char-after p) ?\C-z)
1124                 (> (char-after (1+ p)) 0))
1125       (let* ((namefld (buffer-substring (+ p 2) (+ p 2 13)))
1126              (fnlen   (or (string-match "\0" namefld) 13))
1127              (efnname (substring namefld 0 fnlen))
1128              (csize   (archive-l-e (+ p 15) 4))
1129              (moddate (archive-l-e (+ p 19) 2))
1130              (modtime (archive-l-e (+ p 21) 2))
1131              (ucsize  (archive-l-e (+ p 25) 4))
1132              (fiddle  (string= efnname (upcase efnname)))
1133              (ifnname (if fiddle (downcase efnname) efnname))
1134              (text    (format "  %8d  %-11s  %-8s  %s"
1135                               ucsize
1136                               (archive-dosdate moddate)
1137                               (archive-dostime modtime)
1138                               ifnname)))
1139         (setq maxlen (max maxlen fnlen)
1140               totalsize (+ totalsize ucsize)
1141               visual (cons (vector text
1142                                    (- (length text) (length ifnname))
1143                                    (length text))
1144                            visual)
1145               files (cons (vector efnname ifnname fiddle nil (1- p))
1146                           files)
1147               p (+ p 29 csize))))
1148     (goto-char (point-min))
1149     (let ((dash (concat "- --------  -----------  --------  "
1150                         (make-string maxlen ?-)
1151                         "\n")))
1152       (insert "M   Length  Date         Time      File\n"
1153               dash)
1154       (archive-summarize-files (nreverse visual))
1155       (insert dash
1156               (format "  %8d                         %d file%s"
1157                       totalsize
1158                       (length files)
1159                       (if (= 1 (length files)) "" "s"))
1160               "\n"))
1161     (apply 'vector (nreverse files))))
1162
1163 (defun archive-arc-rename-entry (archive newname descr)
1164   (if (string-match "[:\\\\/]" newname)
1165       (error "File names in arc files may not contain a path"))
1166   (if (> (length newname) 12)
1167       (error "File names in arc files are limited to 12 characters"))
1168   (let ((name (concat newname (substring "\0\0\0\0\0\0\0\0\0\0\0\0\0"
1169                                          (length newname))))
1170         buffer-read-only)
1171     (save-restriction
1172       (save-excursion
1173         (widen)
1174         (goto-char (+ archive-proper-file-start (aref descr 4) 2))
1175         (delete-char 13)
1176         (insert name)))))
1177 ;; -------------------------------------------------------------------------
1178 ;; Section: Lzh Archives
1179
1180 (defun archive-lzh-summarize ()
1181   (let ((p 1)
1182         (totalsize 0)
1183         (maxlen 8)
1184         files
1185         visual)
1186     (while (progn (goto-char p) (looking-at "..-l[hz][0-9]-"))
1187       (let* ((hsize   (char-after p))
1188              (csize   (archive-l-e (+ p 7) 4))
1189              (ucsize  (archive-l-e (+ p 11) 4))
1190              (modtime (archive-l-e (+ p 15) 2))
1191              (moddate (archive-l-e (+ p 17) 2))
1192              (fnlen   (char-after (+ p 21)))
1193              (efnname (buffer-substring (+ p 22) (+ p 22 fnlen)))
1194              (fiddle  (string= efnname (upcase efnname)))
1195              (ifnname (if fiddle (downcase efnname) efnname))
1196              (p2      (+ p 22 fnlen))
1197              (creator (if (>= (- hsize fnlen) 24) (char-after (+ p2 2)) 0))
1198              (mode    (if (= creator ?U) (archive-l-e (+ p2 8) 2) ?\666))
1199              (modestr (if mode (archive-int-to-mode mode) "??????????"))
1200              (uid     (if (= creator ?U) (archive-l-e (+ p2 10) 2)))
1201              (gid     (if (= creator ?U) (archive-l-e (+ p2 12) 2)))
1202              (text    (if archive-alternate-display
1203                           (format "  %8d  %5S  %5S  %s"
1204                                   ucsize
1205                                   (or uid "?")
1206                                   (or gid "?")
1207                                   ifnname)
1208                         (format "  %10s  %8d  %-11s  %-8s  %s"
1209                                 modestr
1210                                 ucsize
1211                                 (archive-dosdate moddate)
1212                                 (archive-dostime modtime)
1213                                 ifnname))))
1214         (setq maxlen (max maxlen fnlen)
1215               totalsize (+ totalsize ucsize)
1216               visual (cons (vector text
1217                                    (- (length text) (length ifnname))
1218                                    (length text))
1219                            visual)
1220               files (cons (vector efnname ifnname fiddle mode (1- p))
1221                           files)
1222               p (+ p hsize 2 csize))))
1223     (goto-char (point-min))
1224     (let ((dash (concat (if archive-alternate-display
1225                             "- --------  -----  -----  "
1226                           "- ----------  --------  -----------  --------  ")
1227                         (make-string maxlen ?-)
1228                         "\n"))
1229           (header (if archive-alternate-display
1230                        "M   Length    Uid    Gid  File\n"
1231                     "M   Filemode    Length  Date         Time      File\n"))
1232           (sumline (if archive-alternate-display
1233                        "  %8d                %d file%s"
1234                      "              %8d                         %d file%s")))
1235       (insert header dash)
1236       (archive-summarize-files (nreverse visual))
1237       (insert dash
1238               (format sumline
1239                       totalsize
1240                       (length files)
1241                       (if (= 1 (length files)) "" "s"))
1242               "\n"))
1243     (apply 'vector (nreverse files))))
1244
1245 (defconst archive-lzh-alternate-display t)
1246
1247 (defun archive-lzh-extract (archive name)
1248   (archive-extract-by-stdout archive name archive-lzh-extract))
1249
1250 (defun archive-lzh-resum (p count)
1251   (let ((sum 0))
1252     (while (> count 0)
1253       (setq count (1- count)
1254             sum (+ sum (char-after p))
1255             p (1+ p)))
1256     (logand sum 255)))
1257
1258 (defun archive-lzh-rename-entry (archive newname descr)
1259   (save-restriction
1260     (save-excursion
1261       (widen)
1262       (let* ((p        (+ archive-proper-file-start (aref descr 4)))
1263              (oldhsize (char-after p))
1264              (oldfnlen (char-after (+ p 21)))
1265              (newfnlen (length newname))
1266              (newhsize (+ oldhsize newfnlen (- oldfnlen)))
1267              buffer-read-only)
1268         (if (> newhsize 255)
1269             (error "The file name is too long"))
1270         (goto-char (+ p 21))
1271         (delete-char (1+ oldfnlen))
1272         (insert newfnlen newname)
1273         (goto-char p)
1274         (delete-char 2)
1275         (insert newhsize (archive-lzh-resum p newhsize))))))
1276
1277 (defun archive-lzh-ogm (newval files errtxt ofs)
1278   (save-restriction
1279     (save-excursion
1280       (widen)
1281       (while files
1282         (let* ((fil (car files))
1283                (p (+ archive-proper-file-start (aref fil 4)))
1284                (hsize   (char-after p))
1285                (fnlen   (char-after (+ p 21)))
1286                (p2      (+ p 22 fnlen))
1287                (creator (if (>= (- hsize fnlen) 24) (char-after (+ p2 2)) 0))
1288                buffer-read-only)
1289           (if (= creator ?U)
1290               (progn
1291                 (or (numberp newval)
1292                     (setq newval (funcall newval (archive-l-e (+ p2 ofs) 2))))
1293                 (goto-char (+ p2 ofs))
1294                 (delete-char 2)
1295                 (insert (logand newval 255) (lsh newval -8))
1296                 (goto-char (1+ p))
1297                 (delete-char 1)
1298                 (insert (archive-lzh-resum (1+ p) hsize)))
1299             (message "Member %s does not have %s field"
1300                      (aref fil 1) errtxt)))
1301         (setq files (cdr files))))))
1302
1303 (defun archive-lzh-chown-entry (newuid files)
1304   (archive-lzh-ogm newuid files "an uid" 10))
1305
1306 (defun archive-lzh-chgrp-entry (newgid files)
1307   (archive-lzh-ogm newgid files "a gid" 12))
1308
1309 (defun archive-lzh-chmod-entry (newmode files)
1310   (archive-lzh-ogm
1311    ;; This should work even though newmode will be dynamically accessed.
1312    (function (lambda (old) (archive-calc-mode old newmode t)))
1313    files "a unix-style mode" 8))
1314 ;; -------------------------------------------------------------------------
1315 ;; Section: Zip Archives
1316
1317 (defun archive-zip-summarize ()
1318   (goto-char (- (point-max) (- 22 18)))
1319   (search-backward-regexp "[P]K\005\006")
1320   (let ((p (1+ (archive-l-e (+ (point) 16) 4)))
1321         (maxlen 8)
1322         (totalsize 0)
1323         files
1324         visual)
1325     (while (string= "PK\001\002" (buffer-substring p (+ p 4)))
1326       (let* ((creator (char-after (+ p 5)))
1327              (method  (archive-l-e (+ p 10) 2))
1328              (modtime (archive-l-e (+ p 12) 2))
1329              (moddate (archive-l-e (+ p 14) 2))
1330              (ucsize  (archive-l-e (+ p 24) 4))
1331              (fnlen   (archive-l-e (+ p 28) 2))
1332              (exlen   (archive-l-e (+ p 30) 2))
1333              (fclen   (archive-l-e (+ p 32) 2))
1334              (lheader (archive-l-e (+ p 42) 4))
1335              (efnname (buffer-substring (+ p 46) (+ p 46 fnlen)))
1336              (isdir   (and (= ucsize 0)
1337                            (string= (file-name-nondirectory efnname) "")))
1338              (mode    (cond ((memq creator '(2 3)) ; Unix + VMS
1339                              (archive-l-e (+ p 40) 2))
1340                             ((memq creator '(0 5 6 7 10 11)) ; Dos etc.
1341                              (logior ?\444
1342                                      (if isdir (logior 16384 ?\111) 0)
1343                                      (if (zerop
1344                                           (logand 1 (char-after (+ p 38))))
1345                                          ?\222 0)))
1346                             (t nil)))
1347              (modestr (if mode (archive-int-to-mode mode) "??????????"))
1348              (fiddle  (and archive-zip-case-fiddle
1349                            (not (not (memq creator '(0 2 4 5 9))))))
1350              (ifnname (if fiddle (downcase efnname) efnname))
1351              (text    (format "  %10s  %8d  %-11s  %-8s  %s"
1352                               modestr
1353                               ucsize
1354                               (archive-dosdate moddate)
1355                               (archive-dostime modtime)
1356                               ifnname)))
1357         (setq maxlen (max maxlen fnlen)
1358               totalsize (+ totalsize ucsize)
1359               visual (cons (vector text
1360                                    (- (length text) (length ifnname))
1361                                    (length text))
1362                            visual)
1363               files (cons (if isdir
1364                               nil
1365                             (vector efnname ifnname fiddle mode
1366                                     (list (1- p) lheader)))
1367                           files)
1368               p (+ p 46 fnlen exlen fclen))))
1369     (goto-char (point-min))
1370     (let ((dash (concat "- ----------  --------  -----------  --------  "
1371                         (make-string maxlen ?-)
1372                         "\n")))
1373       (insert "M Filemode      Length  Date         Time      File\n"
1374               dash)
1375       (archive-summarize-files (nreverse visual))
1376       (insert dash
1377               (format "              %8d                         %d file%s"
1378                       totalsize
1379                       (length files)
1380                       (if (= 1 (length files)) "" "s"))
1381               "\n"))
1382     (apply 'vector (nreverse files))))
1383
1384 (defun archive-zip-extract (archive name)
1385   (if archive-zip-use-pkzip
1386       (archive-*-extract archive name archive-zip-extract)
1387     (archive-extract-by-stdout archive name archive-zip-extract)))
1388
1389 (defun archive-zip-write-file-member (archive descr)
1390   (archive-*-write-file-member
1391    archive
1392    descr
1393    (if (aref descr 2) archive-zip-update-case archive-zip-update)))
1394
1395 (defun archive-zip-chmod-entry (newmode files)
1396   (save-restriction
1397     (save-excursion
1398       (widen)
1399       (while files
1400         (let* ((fil (car files))
1401                (p (+ archive-proper-file-start (car (aref fil 4))))
1402                (creator (char-after (+ p 5)))
1403                (oldmode (aref fil 3))
1404                (newval  (archive-calc-mode oldmode newmode t))
1405                buffer-read-only)
1406           (cond ((memq creator '(2 3)) ; Unix + VMS
1407                  (goto-char (+ p 40))
1408                  (delete-char 2)
1409                  (insert (logand newval 255) (lsh newval -8)))
1410                 ((memq creator '(0 5 6 7 10 11)) ; Dos etc.
1411                  (goto-char (+ p 38))
1412                  (insert (logior (logand (char-after (point)) 254)
1413                                  (logand (logxor 1 (lsh newval -7)) 1)))
1414                  (delete-char 1))
1415                 (t (message "Don't know how to change mode for this member"))))
1416         (setq files (cdr files))))))
1417 ;; -------------------------------------------------------------------------
1418 ;; Section: Zoo Archives
1419
1420 (defun archive-zoo-summarize ()
1421   (let ((p (1+ (archive-l-e 25 4)))
1422         (maxlen 8)
1423         (totalsize 0)
1424         files
1425         visual)
1426     (while (and (string= "\334\247\304\375" (buffer-substring p (+ p 4)))
1427                 (> (archive-l-e (+ p 6) 4) 0))
1428       (let* ((next    (1+ (archive-l-e (+ p 6) 4)))
1429              (moddate (archive-l-e (+ p 14) 2))
1430              (modtime (archive-l-e (+ p 16) 2))
1431              (ucsize  (archive-l-e (+ p 20) 4))
1432              (namefld (buffer-substring (+ p 38) (+ p 38 13)))
1433              (fnlen   (or (string-match "\0" namefld) 13))
1434              (efnname (substring namefld 0 fnlen))
1435              (fiddle  (string= efnname (upcase efnname)))
1436              (ifnname (if fiddle (downcase efnname) efnname))
1437              (text    (format "  %8d  %-11s  %-8s  %s"
1438                               ucsize
1439                               (archive-dosdate moddate)
1440                               (archive-dostime modtime)
1441                               ifnname)))
1442         (setq maxlen (max maxlen fnlen)
1443               totalsize (+ totalsize ucsize)
1444               visual (cons (vector text
1445                                    (- (length text) (length ifnname))
1446                                    (length text))
1447                            visual)
1448               files (cons (vector efnname ifnname fiddle nil (1- p))
1449                           files)
1450               p next)))
1451     (goto-char (point-min))
1452     (let ((dash (concat "- --------  -----------  --------  "
1453                         (make-string maxlen ?-)
1454                         "\n")))
1455       (insert "M   Length  Date         Time      File\n"
1456               dash)
1457       (archive-summarize-files (nreverse visual))
1458       (insert dash
1459               (format "  %8d                         %d file%s"
1460                       totalsize
1461                       (length files)
1462                       (if (= 1 (length files)) "" "s"))
1463               "\n"))
1464     (apply 'vector (nreverse files))))
1465
1466 (defun archive-zoo-extract (archive name)
1467   (archive-extract-by-stdout archive name archive-zoo-extract))
1468 ;; -------------------------------------------------------------------------
1469 (provide 'archive-mode)
1470
1471 ;; arc-mode.el ends here.