:group 'tar)
(defvar tar-parse-info nil)
+;; Be sure that this variable holds byte position, not char position.
(defvar tar-header-offset nil)
(defvar tar-superior-buffer nil)
(defvar tar-superior-descriptor nil)
(put 'tar-superior-buffer 'permanent-local t)
(put 'tar-superior-descriptor 'permanent-local t)
\f
-;;; First, duplicate some Common Lisp functions; I used to just (require 'cl)
-;;; but "cl.el" was messing some people up (also it's really big).
-
(defmacro tar-setf (form val)
"A mind-numbingly simple implementation of setf."
(let ((mform (macroexpand form (and (boundp 'byte-compile-macro-environment)
((eq (car mform) 'cdr)
(list 'setcdr (nth 1 mform) val))
(t (error "don't know how to setf %s" form)))))
-
-(defmacro tar-dolist (control &rest body)
- "syntax: (dolist (var-name list-expr &optional return-value) &body body)"
- (let ((var (car control))
- (init (car (cdr control)))
- (val (car (cdr (cdr control)))))
- (list 'let (list (list '_dolist_iterator_ init))
- (list 'while '_dolist_iterator_
- (cons 'let
- (cons (list (list var '(car _dolist_iterator_)))
- (append body
- (list (list 'setq '_dolist_iterator_
- (list 'cdr '_dolist_iterator_)))))))
- val)))
-
-(defmacro tar-dotimes (control &rest body)
- "syntax: (dolist (var-name count-expr &optional return-value) &body body)"
- (let ((var (car control))
- (n (car (cdr control)))
- (val (car (cdr (cdr control)))))
- (list 'let (list (list '_dotimes_end_ n)
- (list var 0))
- (cons 'while
- (cons (list '< var '_dotimes_end_)
- (append body
- (list (list 'setq var (list '1+ var))))))
- val)))
-
\f
;;; down to business.
(link-p (aref string tar-linkp-offset))
(magic-str (substring string tar-magic-offset (1- tar-uname-offset)))
(uname-valid-p (or (string= "ustar " magic-str) (string= "GNUtar " magic-str)))
- name
+ name linkname
(nulsexp "[^\000]*\000"))
- (and (string-match nulsexp string tar-name-offset) (setq name-end (min name-end (1- (match-end 0)))))
- (and (string-match nulsexp string tar-link-offset) (setq link-end (min link-end (1- (match-end 0)))))
- (and (string-match nulsexp string tar-uname-offset) (setq uname-end (min uname-end (1- (match-end 0)))))
- (and (string-match nulsexp string tar-gname-offset) (setq gname-end (min gname-end (1- (match-end 0)))))
+ (when (string-match nulsexp string tar-name-offset)
+ (setq name-end (min name-end (1- (match-end 0)))))
+ (when (string-match nulsexp string tar-link-offset)
+ (setq link-end (min link-end (1- (match-end 0)))))
+ (when (string-match nulsexp string tar-uname-offset)
+ (setq uname-end (min uname-end (1- (match-end 0)))))
+ (when (string-match nulsexp string tar-gname-offset)
+ (setq gname-end (min gname-end (1- (match-end 0)))))
(setq name (substring string tar-name-offset name-end)
link-p (if (or (= link-p 0) (= link-p ?0))
nil
(- link-p ?0)))
+ (setq linkname (substring string tar-link-offset link-end))
+ (if default-enable-multibyte-characters
+ (setq name
+ (decode-coding-string name (or file-name-coding-system
+ 'undecided))
+ linkname
+ (decode-coding-string linkname (or file-name-coding-system
+ 'undecided))))
(if (and (null link-p) (string-match "/$" name)) (setq link-p 5)) ; directory
(make-tar-header
name
- (tar-parse-octal-integer string tar-mode-offset (1- tar-uid-offset))
- (tar-parse-octal-integer string tar-uid-offset (1- tar-gid-offset))
- (tar-parse-octal-integer string tar-gid-offset (1- tar-size-offset))
- (tar-parse-octal-integer string tar-size-offset (1- tar-time-offset))
- (tar-parse-octal-long-integer string tar-time-offset (1- tar-chk-offset))
- (tar-parse-octal-integer string tar-chk-offset (1- tar-linkp-offset))
+ (tar-parse-octal-integer string tar-mode-offset tar-uid-offset)
+ (tar-parse-octal-integer string tar-uid-offset tar-gid-offset)
+ (tar-parse-octal-integer string tar-gid-offset tar-size-offset)
+ (tar-parse-octal-integer string tar-size-offset tar-time-offset)
+ (tar-parse-octal-long-integer string tar-time-offset tar-chk-offset)
+ (tar-parse-octal-integer string tar-chk-offset tar-linkp-offset)
link-p
- (substring string tar-link-offset link-end)
+ linkname
uname-valid-p
(and uname-valid-p (substring string tar-uname-offset uname-end))
(and uname-valid-p (substring string tar-gname-offset gname-end))
- (tar-parse-octal-integer string tar-dmaj-offset (1- tar-dmin-offset))
- (tar-parse-octal-integer string tar-dmin-offset (1- tar-end-offset))
+ (tar-parse-octal-integer string tar-dmaj-offset tar-dmin-offset)
+ (tar-parse-octal-integer string tar-dmin-offset tar-end-offset)
)))
(t 'empty-tar-block)))
(defun tar-parse-octal-integer-safe (string)
(let ((L (length string)))
(if (= L 0) (error "empty string"))
- (tar-dotimes (i L)
+ (dotimes (i L)
(if (or (< (aref string i) ?0)
(> (aref string i) ?7))
(error "`%c' is not an octal digit"))))
(l (length chk-string)))
(aset hblock 154 0)
(aset hblock 155 32)
- (tar-dotimes (i l) (aset hblock (- 153 i) (aref chk-string (- l i 1)))))
+ (dotimes (i l) (aset hblock (- 153 i) (aref chk-string (- l i 1)))))
hblock)
(defun tar-clip-time-string (time)
(lastdigit (+ slash groupw sizew))
(datestart (+ lastdigit 2))
(namestart (+ datestart datew))
- (string (make-string (+ namestart (length name) (if link-p (+ 5 (length link-name)) 0)) 32))
+ (multibyte (or (multibyte-string-p name)
+ (multibyte-string-p link-name)))
+ ;; If multibyte, we can't use optimized method of aset,
+ ;; instead we must use concat.
+ (string (make-string (if multibyte
+ namestart
+ (+ namestart
+ (length name)
+ (if link-p (+ 5 (length link-name)) 0)))
+ 32))
(type (tar-header-link-type tar-hblock)))
(aset string 0 (if mod-p ?* ? ))
(aset string 1
(setq gid (if (= 0 (length gname)) (int-to-string gid) gname))
(setq size (int-to-string size))
(setq time (tar-clip-time-string time))
- (tar-dotimes (i (min (1- namew) (length uid))) (aset string (- slash i) (aref uid (- (length uid) i 1))))
+ (dotimes (i (min (1- namew) (length uid))) (aset string (- slash i) (aref uid (- (length uid) i 1))))
(aset string (1+ slash) ?/)
- (tar-dotimes (i (min (1- groupw) (length gid))) (aset string (+ (+ slash 2) i) (aref gid i)))
- (tar-dotimes (i (min sizew (length size))) (aset string (- lastdigit i) (aref size (- (length size) i 1))))
+ (dotimes (i (min (1- groupw) (length gid))) (aset string (+ (+ slash 2) i) (aref gid i)))
+ (dotimes (i (min sizew (length size))) (aset string (- lastdigit i) (aref size (- (length size) i 1))))
(if tar-mode-show-date
- (tar-dotimes (i (length time)) (aset string (+ datestart i) (aref time i))))
- (tar-dotimes (i (length name)) (aset string (+ namestart i) (aref name i)))
+ (dotimes (i (length time)) (aset string (+ datestart i) (aref time i))))
+ (if multibyte
+ (setq string (concat string name))
+ (dotimes (i (length name)) (aset string (+ namestart i) (aref name i))))
(if (or (eq link-p 1) (eq link-p 2))
- (progn
- (tar-dotimes (i 3) (aset string (+ namestart 1 (length name) i) (aref (if (= link-p 1) "==>" "-->") i)))
- (tar-dotimes (i (length link-name)) (aset string (+ namestart 5 (length name) i) (aref link-name i)))))
+ (if multibyte
+ (setq string (concat string
+ (if (= link-p 1) " ==> " " --> ")
+ link-name))
+ (dotimes (i 3) (aset string (+ namestart 1 (length name) i) (aref (if (= link-p 1) "==>" "-->") i)))
+ (dotimes (i (length link-name)) (aset string (+ namestart 5 (length name) i) (aref link-name i)))))
(put-text-property namestart (length string)
'mouse-face 'highlight string)
string)))
Place a dired-like listing on the front;
then narrow to it, so that only that listing
is visible (and the real data of the buffer is hidden)."
+ (set-buffer-multibyte nil)
(message "Parsing tar file...")
(let* ((result '())
(pos 1)
(summaries nil))
;; Collect summary lines and insert them all at once since tar files
;; can be pretty big.
- (tar-dolist (tar-desc (reverse tar-parse-info))
+ (dolist (tar-desc (reverse tar-parse-info))
(setq summaries
(cons (tar-header-block-summarize (tar-desc-tokens tar-desc))
(cons "\n"
summaries))))
- (insert (apply 'concat summaries))
+ (let ((total-summaries (apply 'concat summaries)))
+ (if (multibyte-string-p total-summaries)
+ (set-buffer-multibyte t))
+ (insert total-summaries))
(make-local-variable 'tar-header-offset)
(setq tar-header-offset (point))
(narrow-to-region 1 tar-header-offset)
+ (if enable-multibyte-characters
+ (setq tar-header-offset (position-bytes tar-header-offset)))
(set-buffer-modified-p nil))))
\f
(defvar tar-mode-map nil "*Local keymap for Tar mode listings.")
(define-key tar-mode-map [down] 'tar-next-line)
(define-key tar-mode-map "o" 'tar-extract-other-window)
(define-key tar-mode-map "p" 'tar-previous-line)
- (define-key tar-mode-map "q" 'tar-quit)
+ (define-key tar-mode-map "q" 'quit-window)
(define-key tar-mode-map "\^P" 'tar-previous-line)
(define-key tar-mode-map [up] 'tar-previous-line)
(define-key tar-mode-map "R" 'tar-rename-entry)
(setq local-enable-local-variables nil)
(make-local-variable 'next-line-add-newlines)
(setq next-line-add-newlines nil)
+ ;; Prevent loss of data when saving the file.
+ (make-local-variable 'file-precious-flag)
+ (setq file-precious-flag t)
(setq major-mode 'tar-mode)
(setq mode-name "Tar")
(use-local-map tar-mode-map)
(setq write-contents-hooks '(tar-mode-write-file))
(widen)
(if (and (boundp 'tar-header-offset) tar-header-offset)
- (narrow-to-region 1 tar-header-offset)
+ (narrow-to-region 1 (byte-to-position tar-header-offset))
(tar-summarize-buffer)
(tar-next-line 0))
(run-hooks 'tar-mode-hook)
(start (+ (tar-desc-data-start descriptor) tar-header-offset -1))
(end (+ start size)))
(let* ((tar-buffer (current-buffer))
- (tarname (file-name-nondirectory (buffer-file-name)))
+ (tar-buffer-multibyte enable-multibyte-characters)
+ (tarname (if (buffer-file-name)
+ (file-name-nondirectory (buffer-file-name))
+ (buffer-name)))
(bufname (concat (file-name-nondirectory name)
" ("
tarname
(unwind-protect
(progn
(widen)
+ (set-buffer-multibyte nil)
(save-excursion
(set-buffer buffer)
- (insert-buffer-substring tar-buffer start end)
+ (if enable-multibyte-characters
+ (progn
+ ;; We must avoid unibyte->multibyte conversion.
+ (set-buffer-multibyte nil)
+ (insert-buffer-substring tar-buffer start end)
+ (set-buffer-multibyte t))
+ (insert-buffer-substring tar-buffer start end))
(goto-char 0)
(setq buffer-file-name
;; `:' is not allowed on Windows
(set-buffer-modified-p nil)
(tar-subfile-mode 1))
(set-buffer tar-buffer))
- (narrow-to-region 1 tar-header-offset)))
+ (narrow-to-region 1 tar-header-offset)
+ (set-buffer-multibyte tar-buffer-multibyte)))
(if view-p
(view-buffer buffer (and just-created 'kill-buffer))
(if (eq other-window-p 'display)
(size (tar-header-size tokens))
(start (+ (tar-desc-data-start descriptor) tar-header-offset -1))
(end (+ start size))
+ (multibyte enable-multibyte-characters)
(inhibit-file-name-handlers inhibit-file-name-handlers)
(inhibit-file-name-operation inhibit-file-name-operation))
(save-restriction
(and (eq inhibit-file-name-operation 'write-region)
inhibit-file-name-handlers))
inhibit-file-name-operation 'write-region))
- (write-region start end to-file))
+ (unwind-protect
+ (let ((coding-system-for-write 'no-conversion))
+ (set-buffer-multibyte nil)
+ (write-region start end to-file))
+ (set-buffer-multibyte multibyte)))
(message "Copied tar entry %s to %s" name to-file)))
(defun tar-flag-deleted (p &optional unflag)
With a prefix argument, mark that many files."
(interactive "p")
(beginning-of-line)
- (tar-dotimes (i (if (< p 0) (- p) p))
+ (dotimes (i (if (< p 0) (- p) p))
(if (tar-current-descriptor unflag) ; barf if we're not on an entry-line.
(progn
(delete-char 1)
(tar-flag-deleted (- p) t))
+;; When this function is called, it is sure that the buffer is unibyte.
(defun tar-expunge-internal ()
"Expunge the tar-entry specified by the current line."
(let* ((descriptor (tar-current-descriptor))
;; iteration over the files that remain, or only iterate up to
;; the next file to be deleted.
(let ((data-length (- data-end data-start)))
- (tar-dolist (desc following-descs)
+ (dolist (desc following-descs)
(tar-setf (tar-desc-data-start desc)
(- (tar-desc-data-start desc) data-length))))
))
(interactive)
(if (or noconfirm
(y-or-n-p "Expunge files marked for deletion? "))
- (let ((n 0))
+ (let ((n 0)
+ (multibyte enable-multibyte-characters))
+ (set-buffer-multibyte nil)
(save-excursion
(goto-char 0)
(while (not (eobp))
(forward-line 1)))
;; after doing the deletions, add any padding that may be necessary.
(tar-pad-to-blocksize)
- (narrow-to-region 1 tar-header-offset)
- )
+ (narrow-to-region 1 tar-header-offset))
+ (set-buffer-multibyte multibyte)
(if (zerop n)
(message "Nothing to expunge.")
(message "%s files expunged. Be sure to save this buffer." n)))))
(interactive)
(save-excursion
(goto-char 1)
- (while (< (point) tar-header-offset)
+ (while (< (position-bytes (point)) tar-header-offset)
(if (not (eq (following-char) ?\ ))
(progn (delete-char 1) (insert " ")))
(forward-line 1))))
(defun tar-alter-one-field (data-position new-data-string)
(let* ((descriptor (tar-current-descriptor))
- (tokens (tar-desc-tokens descriptor)))
+ (tokens (tar-desc-tokens descriptor))
+ (multibyte enable-multibyte-characters))
(unwind-protect
(save-excursion
;;
(forward-line 1)
(delete-region p (point))
(insert (tar-header-block-summarize tokens) "\n")
- (setq tar-header-offset (point-max)))
+ (setq tar-header-offset (position-bytes (point-max))))
(widen)
+ (set-buffer-multibyte nil)
(let* ((start (+ (tar-desc-data-start descriptor) tar-header-offset -513)))
;;
;; delete the old field and insert a new one.
chk (tar-header-name tokens))
)))
(narrow-to-region 1 tar-header-offset)
+ (set-buffer-multibyte multibyte)
(tar-next-line 0))))
(error "This buffer doesn't have an index into its superior tar file!"))
(save-excursion
(let ((subfile (current-buffer))
- (subfile-size (buffer-size))
+ (subfile-multibyte enable-multibyte-characters)
(coding buffer-file-coding-system)
- (descriptor tar-superior-descriptor))
+ (descriptor tar-superior-descriptor)
+ subfile-size)
+ ;; We must make the current buffer unibyte temporarily to avoid
+ ;; multibyte->unibyte conversion in `insert-buffer'.
+ (set-buffer-multibyte nil)
+ (setq subfile-size (buffer-size))
(set-buffer tar-superior-buffer)
(let* ((tokens (tar-desc-tokens descriptor))
(start (tar-desc-data-start descriptor))
(size (tar-header-size tokens))
(size-pad (ash (ash (+ size 511) -9) 9))
(head (memq descriptor tar-parse-info))
- (following-descs (cdr head)))
+ (following-descs (cdr head))
+ (tar-buffer-multibyte enable-multibyte-characters))
(if (not head)
(error "Can't find this tar file entry in its parent tar file!"))
(unwind-protect
(save-excursion
(widen)
+ (set-buffer-multibyte nil)
;; delete the old data...
(let* ((data-start (+ start tar-header-offset -1))
(data-end (+ data-start (ash (ash (+ size 511) -9) 9))))
;; update the data pointer of this and all following files...
(tar-setf (tar-header-size tokens) subfile-size)
(let ((difference (- subfile-size-pad size-pad)))
- (tar-dolist (desc following-descs)
+ (dolist (desc following-descs)
(tar-setf (tar-desc-data-start desc)
(+ (tar-desc-data-start desc) difference))))
;;
(setq after (point))
;; Insert the new text after the old, before deleting,
;; to preserve the window start.
- (insert-before-markers (tar-header-block-summarize tokens t) "\n")
+ (let ((line (tar-header-block-summarize tokens t)))
+ (if (multibyte-string-p line)
+ (insert-before-markers (string-as-unibyte line) "\n")
+ (insert-before-markers line "\n")))
(delete-region p after)
(setq tar-header-offset (marker-position m)))
)))
;; after doing the insertion, add any final padding that may be necessary.
(tar-pad-to-blocksize))
- (narrow-to-region 1 tar-header-offset)))
+ (narrow-to-region 1 tar-header-offset)
+ (set-buffer-multibyte tar-buffer-multibyte)))
(set-buffer-modified-p t) ; mark the tar file as modified
(tar-next-line 0)
(set-buffer subfile)
+ ;; Restore the buffer multibyteness.
+ (set-buffer-multibyte subfile-multibyte)
(set-buffer-modified-p nil) ; mark the tar subfile as unmodified
(message "Saved into tar-buffer `%s'. Be sure to save that buffer!"
(buffer-name tar-superior-buffer))
t)))
+;; When this function is called, it is sure that the buffer is unibyte.
(defun tar-pad-to-blocksize ()
"If we are being anal about tar file blocksizes, fix up the current buffer.
Leaves the region wide."
;; (tar-pad-to-blocksize)
;; tar-header-offset turns out to be null for files fetched with W3,
;; at least.
- (write-region (or tar-header-offset (point-min)) (point-max)
- buffer-file-name nil t)
+ (let ((coding-system-for-write 'no-conversion))
+ (write-region (or (byte-to-position tar-header-offset)
+ (point-min))
+ (point-max)
+ buffer-file-name nil t))
(tar-clear-modification-flags)
(set-buffer-modified-p nil))
- (narrow-to-region 1 tar-header-offset))
- ;; return T because we've written the file.
+ (narrow-to-region 1 (byte-to-position tar-header-offset)))
+ ;; Return t because we've written the file.
t)
-
-(defun tar-quit ()
- "Kill the current tar buffer."
- (interactive)
- (kill-buffer nil))
-
\f
(provide 'tar-mode)