mirrors/emacs
1
Fork 0
mirror of git://git.sv.gnu.org/emacs.git synced 2025-12-15 10:30:25 -08:00
Code Issues Projects Releases Wiki Activity

(tar-extract): Set file name by hand before calling

Browse source 
set-visited-file-name.

Various renamings; all callers changed.
(tar-header-block-tokenize): Renamed from tokenize-tar-header-block.
(tar-header-block-checksum): Renamed from checksum-tar-header-block.
(tar-header-block-check-checksum):
Renamed from check-tar-header-block-checksum.
(tar-header-block-recompute-checksum):
Renamed from recompute-tar-header-block-checksum.
(tar-header-block-summarize):
Renamed from summarize-tar-header-block.
This commit is contained in:
Richard M. Stallman 1994-06-23 17:52:44 +00:00
parent cde4c890f1
commit 1bc2809981
1 changed files with 21 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

38
lisp/tar-mode.el
View file

@ -216,7 +216,7 @@ the file never exists on disk.")
(defconst tar-dmin-offset (+ tar-dmaj-offset 8))
(defconst tar-end-offset (+ tar-dmin-offset 8))
(defun tokenize-tar-header-block (string)
(defun tar-header-block-tokenize (string)
"Return a `tar-header' structure.
This is a list of name, mode, uid, gid, size,
write-date, checksum, link-type, and link-name."
@ -283,7 +283,7 @@ write-date, checksum, link-type, and link-name."
(tar-parse-octal-integer string))
(defun checksum-tar-header-block (string)
(defun tar-header-block-checksum (string)
"Compute and return a tar-acceptable checksum for this block."
(let* ((chk-field-start tar-chk-offset)
(chk-field-end (+ chk-field-start 8))
@ -300,14 +300,14 @@ write-date, checksum, link-type, and link-name."
i (1+ i)))
(+ sum (* 32 8))))
(defun check-tar-header-block-checksum (hblock desired-checksum file-name)
(defun tar-header-block-check-checksum (hblock desired-checksum file-name)
"Beep and print a warning if the checksum doesn't match."
(if (not (= desired-checksum (checksum-tar-header-block hblock)))
(if (not (= desired-checksum (tar-header-block-checksum hblock)))
(progn (beep) (message "Invalid checksum for file %s!" file-name))))
(defun recompute-tar-header-block-checksum (hblock)
(defun tar-header-block-recompute-checksum (hblock)
"Modifies the given string to have a valid checksum field."
(let* ((chk (checksum-tar-header-block hblock))
(let* ((chk (tar-header-block-checksum hblock))
(chk-string (format "%6o" chk))
(l (length chk-string)))
(aset hblock 154 0)
@ -331,7 +331,7 @@ write-date, checksum, link-type, and link-name."
(if (zerop (logand 2048 mode)) nil (aset string (+ start 5) ?s))
string)
(defun summarize-tar-header-block (tar-hblock &optional mod-p)
(defun tar-header-block-summarize (tar-hblock &optional mod-p)
"Returns a line similar to the output of `tar -vtf'."
(let ((name (tar-header-name tar-hblock))
(mode (tar-header-mode tar-hblock))
@ -401,7 +401,7 @@ is visible (and the real data of the buffer is hidden)."
(tokens nil))
(while (not (eq tokens 'empty-tar-block))
(let* ((hblock (buffer-substring pos (+ pos 512))))
(setq tokens (tokenize-tar-header-block hblock))
(setq tokens (tar-header-block-tokenize hblock))
(setq pos (+ pos 512))
(message "parsing tar file...%s%%"
;(/ (* pos 100) bs) ; this gets round-off lossage
@ -419,8 +419,8 @@ is visible (and the real data of the buffer is hidden)."
(tar-header-name tokens) size))
;
; This is just too slow. Don't really need it anyway....
;(check-tar-header-block-checksum
; hblock (checksum-tar-header-block hblock)
;(tar-header-block-check-checksum
; hblock (tar-header-block-checksum hblock)
; (tar-header-name tokens))
(setq result (cons (make-tar-desc pos tokens) result))
@ -439,7 +439,7 @@ is visible (and the real data of the buffer is hidden)."
(let ((buffer-read-only nil))
(tar-dolist (tar-desc tar-parse-info)
(insert-string
(summarize-tar-header-block (tar-desc-tokens tar-desc)))
(tar-header-block-summarize (tar-desc-tokens tar-desc)))
(insert-string "\n"))
(make-local-variable 'tar-header-offset)
(setq tar-header-offset (point))
@ -683,8 +683,12 @@ save your changes to disk."
(set-buffer buffer)
(insert-buffer-substring tar-buffer start end)
(goto-char 0)
;; Give it a name for lit-buffers and to decide mode.
(set-visited-file-name (concat tarname ":" name))
;; Give it a name for list-buffers and to decide mode.
;; Set buffer-file-name by hand first
;; so that set-visited-file-name won't lock the filename.
(setq buffer-file-name
(expand-file-name (concat tarname ":" name)))
(set-visited-file-name buffer-file-name)
(normal-mode) ; pick a mode.
;;; Without a file name, save-buffer doesn't work.
;;; (set-visited-file-name nil) ; nuke the name - not meaningful.
@ -963,7 +967,7 @@ for this to be permanent."
(let ((p (point)))
(forward-line 1)
(delete-region p (point))
(insert (summarize-tar-header-block tokens) "\n")
(insert (tar-header-block-summarize tokens) "\n")
(setq tar-header-offset (point-max)))
(widen)
@ -975,7 +979,7 @@ for this to be permanent."
(insert new-data-string) ; <--
;;
;; compute a new checksum and insert it.
(let ((chk (checksum-tar-header-block
(let ((chk (tar-header-block-checksum
(buffer-substring start (+ start 512)))))
(goto-char (+ start tar-chk-offset))
(delete-region (point) (+ (point) 8))
@ -1063,7 +1067,7 @@ to make your changes permanent."
(insert ? ))
;;
;; compute a new checksum and insert it.
(let ((chk (checksum-tar-header-block
(let ((chk (tar-header-block-checksum
(buffer-substring header-start data-start))))
(goto-char (+ header-start tar-chk-offset))
(delete-region (point) (+ (point) 8))
@ -1085,7 +1089,7 @@ to make your changes permanent."
(setq after (point))
;; Insert the new text after the old, before deleting,
;; to preserve the window start.
(insert-before-markers (summarize-tar-header-block tokens t) "\n")
(insert-before-markers (tar-header-block-summarize tokens t) "\n")
(delete-region p after)
(setq tar-header-offset (marker-position m)))
)))