;;; jka-compr.el --- reading/writing/loading compressed files
-;; Copyright (C) 1993, 1994, 1995, 1997, 1999, 2000, 2002, 2003,
-;; 2004, 2005 Free Software Foundation, Inc.
+;; Copyright (C) 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003,
+;; 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
;; Author: jka@ece.cmu.edu (Jay K. Adams)
;; Maintainer: FSF
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
+;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; The default value of this variable allows jka-compr to work with
;; Unix compress and gzip.
;;
-;; If you are concerned about the stderr output of gzip and other
-;; compression/decompression programs showing up in your buffers, you
-;; should set the discard-error flag in the compression-info-list.
-;; This will cause the stderr of all programs to be discarded.
-;; However, it also causes emacs to call compression/uncompression
-;; programs through a shell (which is specified by jka-compr-shell).
-;; This may be a drag if, on your system, starting up a shell is
-;; slow.
-;;
;; If you don't want messages about compressing and decompressing
-;; to show up in the echo area, you can set the compress-name and
-;; decompress-name fields of the jka-compr-compression-info-list to
+;; to show up in the echo area, you can set the compress-msg and
+;; decompress-msg fields of the jka-compr-compression-info-list to
;; nil.
;;; Code:
+(require 'jka-cmpr-hook)
+
(defcustom jka-compr-shell "sh"
"*Shell to be used for calling compression programs.
-The value of this variable only matters if you want to discard the
-stderr of a compression/decompression program (see the documentation
-for `jka-compr-compression-info-list')."
+NOTE: Not used in MS-DOS and Windows systems."
:type 'string
:group 'jka-compr)
(make-variable-buffer-local 'jka-compr-really-do-compress)
(put 'jka-compr-really-do-compress 'permanent-local t)
\f
-;;; Functions for accessing the return value of jka-compr-get-compression-info
-(defun jka-compr-info-regexp (info) (aref info 0))
-(defun jka-compr-info-compress-message (info) (aref info 1))
-(defun jka-compr-info-compress-program (info) (aref info 2))
-(defun jka-compr-info-compress-args (info) (aref info 3))
-(defun jka-compr-info-uncompress-message (info) (aref info 4))
-(defun jka-compr-info-uncompress-program (info) (aref info 5))
-(defun jka-compr-info-uncompress-args (info) (aref info 6))
-(defun jka-compr-info-can-append (info) (aref info 7))
-(defun jka-compr-info-strip-extension (info) (aref info 8))
-(defun jka-compr-info-file-magic-bytes (info) (aref info 9))
-
-
-(defun jka-compr-get-compression-info (filename)
- "Return information about the compression scheme of FILENAME.
-The determination as to which compression scheme, if any, to use is
-based on the filename itself and `jka-compr-compression-info-list'."
- (catch 'compression-info
- (let ((case-fold-search nil))
- (mapcar
- (function (lambda (x)
- (and (string-match (jka-compr-info-regexp x) filename)
- (throw 'compression-info x))))
- jka-compr-compression-info-list)
- nil)))
-
(put 'compression-error 'error-conditions '(compression-error file-error error))
(defun jka-compr-error (prog args infile message &optional errfile)
- (let ((errbuf (get-buffer-create " *jka-compr-error*"))
- (curbuf (current-buffer)))
+ (let ((errbuf (get-buffer-create " *jka-compr-error*")))
(with-current-buffer errbuf
(widen) (erase-buffer)
(insert (format "Error while executing \"%s %s < %s\"\n\n"
;; to discard the part we don't want.
(let ((skip (/ beg jka-compr-dd-blocksize))
(err-file (jka-compr-make-temp-name))
+ ;; call-process barfs if default-directory is inaccessible.
+ (default-directory
+ (if (and default-directory
+ (file-accessible-directory-p default-directory))
+ default-directory
+ (file-name-directory infile)))
count)
;; Update PREFIX based on the text that we won't read in.
(setq prefix (- beg (* skip jka-compr-dd-blocksize))
(defun jka-compr-call-process (prog message infile output temp args)
- (if jka-compr-use-shell
-
- (let ((err-file (jka-compr-make-temp-name))
- (coding-system-for-read (or coding-system-for-read 'undecided))
- (coding-system-for-write 'no-conversion))
-
- (unwind-protect
-
- (or (memq
- (call-process jka-compr-shell infile
- (if (stringp output) nil output)
- nil
- "-c"
- (format "%s %s 2> %s %s"
- prog
- (mapconcat 'identity args " ")
- err-file
- (if (stringp output)
- (concat "> " output)
- "")))
- jka-compr-acceptable-retval-list)
-
- (jka-compr-error prog args infile message err-file))
-
- (jka-compr-delete-temp-file err-file)))
-
- (or (eq 0
- (apply 'call-process
- prog
- infile
- (if (stringp output) temp output)
- nil
- args))
- (jka-compr-error prog args infile message))
-
- (and (stringp output)
- (with-current-buffer temp
- (write-region (point-min) (point-max) output)
- (erase-buffer)))))
-
-
-;;; Support for temp files. Much of this was inspired if not lifted
-;;; from ange-ftp.
+ ;; call-process barfs if default-directory is inaccessible.
+ (let ((default-directory
+ (if (and default-directory
+ (file-accessible-directory-p default-directory))
+ default-directory
+ (file-name-directory infile))))
+ (if jka-compr-use-shell
+ (let ((err-file (jka-compr-make-temp-name))
+ (coding-system-for-read (or coding-system-for-read 'undecided))
+ (coding-system-for-write 'no-conversion))
+ (unwind-protect
+ (or (memq
+ (call-process jka-compr-shell infile
+ (if (stringp output) nil output)
+ nil
+ "-c"
+ (format "%s %s 2> %s %s"
+ prog
+ (mapconcat 'identity args " ")
+ err-file
+ (if (stringp output)
+ (concat "> " output)
+ "")))
+ jka-compr-acceptable-retval-list)
+ (jka-compr-error prog args infile message err-file))
+ (jka-compr-delete-temp-file err-file)))
+ (or (eq 0
+ (apply 'call-process
+ prog infile (if (stringp output) temp output)
+ nil args))
+ (jka-compr-error prog args infile message))
+ (and (stringp output)
+ (with-current-buffer temp
+ (write-region (point-min) (point-max) output)
+ (erase-buffer))))))
+
+
+;; Support for temp files. Much of this was inspired if not lifted
+;; from ange-ftp.
(defcustom jka-compr-temp-name-template
(expand-file-name "jka-com" temporary-file-directory)
(jka-compr-run-real-handler 'file-local-copy (list filename)))
(temp-file (jka-compr-make-temp-name t))
(temp-buffer (get-buffer-create " *jka-compr-flc-temp*"))
- (notfound nil)
local-file)
(setq local-file (or local-copy filename))
(jka-compr-run-real-handler 'file-local-copy (list filename)))))
-;;; Support for loading compressed files.
+;; Support for loading compressed files.
(defun jka-compr-load (file &optional noerror nomessage nosuffix)
"Documented as original."
by `jka-compr-installed'."
;; Delete from inhibit-first-line-modes-suffixes
;; what jka-compr-install added.
- (mapcar
+ (mapc
(function (lambda (x)
(and (jka-compr-info-strip-extension x)
(setq inhibit-first-line-modes-suffixes
(delete (jka-compr-info-regexp x)
inhibit-first-line-modes-suffixes)))))
- jka-compr-compression-info-list)
+ jka-compr-compression-info-list--internal)
(let* ((fnha (cons nil file-name-handler-alist))
(last fnha))
(while (cdr last)
(setq entry (car (cdr last)))
- (if (or (member entry jka-compr-mode-alist-additions)
+ (if (or (member entry jka-compr-mode-alist-additions--internal)
(and (consp (cdr entry))
(eq (nth 2 entry) 'jka-compr)))
(setcdr last (cdr (cdr last)))
(setq auto-mode-alist (cdr ama)))
- (let* ((ama (cons nil file-coding-system-alist))
- (last ama)
- entry)
-
- (while (cdr last)
- (setq entry (car (cdr last)))
- (if (member entry jka-compr-added-to-file-coding-system-alist)
- (setcdr last (cdr (cdr last)))
- (setq last (cdr last))))
-
- (setq file-coding-system-alist (cdr ama)))
+ (while jka-compr-added-to-file-coding-system-alist
+ (setq file-coding-system-alist
+ (delq (car (member (pop jka-compr-added-to-file-coding-system-alist)
+ file-coding-system-alist))
+ file-coding-system-alist)))
;; Remove the suffixes that were added by jka-compr.
- (let ((suffixes nil)
- (re (jka-compr-build-file-regexp)))
- (dolist (suffix load-suffixes)
- (unless (string-match re suffix)
- (push suffix suffixes)))
- (setq load-suffixes (nreverse suffixes))))
+ (dolist (suff jka-compr-load-suffixes--internal)
+ (setq load-file-rep-suffixes (delete suff load-file-rep-suffixes)))
+
+ (setq jka-compr-compression-info-list--internal nil
+ jka-compr-mode-alist-additions--internal nil
+ jka-compr-load-suffixes--internal nil))
(provide 'jka-compr)
-;;; arch-tag: 3f15b630-e9a7-46c4-a22a-94afdde86ebc
+;; arch-tag: 3f15b630-e9a7-46c4-a22a-94afdde86ebc
;;; jka-compr.el ends here