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(archive-lzh-summarize): Only apply the "downcase if all upcase" rule

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to OS-ID 0 "generic".  Always downcase for OS-ID M "MSDOS".
This commit is contained in:
Chong Yidong 2007-04-16 19:40:14 +00:00
parent 3dd2971931
commit bdbfe3bfd6
1 changed files with 17 additions and 2 deletions
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19
lisp/arc-mode.el
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@ -1415,7 +1415,7 @@ This doesn't recover lost files, it just undoes changes in the buffer itself."
(time2 (archive-l-e (+ p 17) 2)) ;and UNIX format in level 2 header.)
(hdrlvl (char-after (+ p 20))) ;header level
thsize ;total header size (base + extensions)
fnlen efnname fiddle ifnname width p2
fnlen efnname osid fiddle ifnname width p2
neh ;beginning of next extension header (level 1 and 2)
mode modestr uid gid text dir prname
gname uname modtime moddate)
@ -1474,7 +1474,22 @@ This doesn't recover lost files, it just undoes changes in the buffer itself."
(setq thsize (- neh p))))
(if (= hdrlvl 0) ;total header size
(setq thsize hsize))
(setq fiddle (if efnname (string= efnname (upcase efnname))))
;; OS ID field not present in level 0 header, use code 0 "generic"
;; in that case as per lha program header.c get_header()
(setq osid (cond ((= hdrlvl 0) 0)
((= hdrlvl 1) (char-after (+ p 22 fnlen 2)))
((= hdrlvl 2) (char-after (+ p 23)))))
;; Filename fiddling must follow the lha program, otherwise the name
;; passed to "lha pq" etc won't match (which for an extract silently
;; results in no output). As of version 1.14i it goes from the OS ID,
;; - For 'M' MSDOS: msdos_to_unix_filename() downcases always, and
;; converts "\" to "/".
;; - For 0 generic: generic_to_unix_filename() downcases if there's
;; no lower case already present, and converts "\" to "/".
;; - For 'm' MacOS: macos_to_unix_filename() changes "/" to ":" and
;; ":" to "/"
(setq fiddle (cond ((= ?M osid) t)
((= 0 osid) (string= efnname (upcase efnname)))))
(setq ifnname (if fiddle (downcase efnname) efnname))
(setq prname (if dir (concat dir ifnname) ifnname))
(setq width (if prname (string-width prname) 0))