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(archive-find-type): lzh-exe for lzh self-extracting exe.

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(archive-lzh-summarize): Add optional start arg for where to start
looking at the archive.
(archive-lzh-exe-summarize, archive-lzh-exe-extract): New functions.
This commit is contained in:
Chong Yidong 2007-04-19 23:53:02 +00:00
parent 9cd04e1639
commit fcb006c4ee
1 changed files with 34 additions and 2 deletions
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36
lisp/arc-mode.el
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@ -700,6 +700,10 @@ archive.
(string-match "\\.[aA][rR][cC]$"
(or buffer-file-name (buffer-name))))
'arc)
;; This pattern modelled on the BSD/GNU+Linux `file' command.
;; Have seen capital "LHA's", and file has lower case "LHa's" too.
;; Note this regexp is also in archive-exe-p.
((looking-at "MZ\\(.\\|\n\\)\\{34\\}LH[aA]'s SFX ") 'lzh-exe)
(t (error "Buffer format not recognized")))))
;; -------------------------------------------------------------------------
(defun archive-summarize (&optional shut-up)
@ -1398,8 +1402,8 @@ This doesn't recover lost files, it just undoes changes in the buffer itself."
;; -------------------------------------------------------------------------
;; Section: Lzh Archives
(defun archive-lzh-summarize ()
(let ((p 1)
(defun archive-lzh-summarize (&optional start)
(let ((p (or start 1)) ;; 1 for .lzh, something further on for .exe
(totalsize 0)
(maxlen 8)
files
@ -1621,6 +1625,34 @@ This doesn't recover lost files, it just undoes changes in the buffer itself."
;; This should work even though newmode will be dynamically accessed.
(lambda (old) (archive-calc-mode old newmode t))
files "a unix-style mode" 8))
;; -------------------------------------------------------------------------
;; Section: Lzh Self-Extracting .exe Archives
;;
;; No support for modifying these files. It looks like the lha for unix
;; program (as of version 1.14i) can't create or retain the DOS exe part.
;; If you do an "lha a" on a .exe for instance it renames and writes to a
;; plain .lzh.
(defun archive-lzh-exe-summarize ()
"Summarize the contents of an LZH self-extracting exe, for `archive-mode'."
;; Skip the initial executable code part and apply archive-lzh-summarize
;; to the archive part proper. The "-lh5-" etc regexp here for the start
;; is the same as in archive-find-type.
;;
;; The lha program (version 1.14i) does this in skip_msdos_sfx1_code() by
;; a similar scan. It looks for "..-l..-" plus for level 0 or 1 a test of
;; the header checksum, or level 2 a test of the "attribute" and size.
;;
(re-search-forward "..-l[hz][0-9ds]-" nil)
(archive-lzh-summarize (match-beginning 0)))
;; `archive-lzh-extract' runs "lha pq", and that works for .exe as well as
;; .lzh files
(defalias 'archive-lzh-exe-extract 'archive-lzh-extract
"Extract a member from an LZH self-extracting exe, for `archive-mode'.")
;; -------------------------------------------------------------------------
;; Section: Zip Archives