;;; dos-fns.el --- MS-Dos specific functions
-;; Copyright (C) 1991, 1993, 1995, 1996, 2002, 2003, 2004,
-;; 2005 Free Software Foundation, Inc.
+;; Copyright (C) 1991, 1993, 1995, 1996, 2001, 2002, 2003, 2004, 2005,
+;; 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
;; Maintainer: Morten Welinder <terra@diku.dk>
;; Keywords: internal
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
+(declare-function int86 "dosfns.c")
+(declare-function msdos-long-file-names "msdos.c")
+
;; This overrides a trivial definition in files.el.
(defun convert-standard-filename (filename)
"Convert a standard file's name to something suitable for the current OS.
(dos-8+3-filename dir))
string))))))
+;; This is for the sake of standard file names elsewhere in Emacs that
+;; are defined as constant strings or via defconst, and whose
+;; conversion via `convert-standard-filename' does not give good
+;; enough results.
+(defun dosified-file-name (file-name)
+ "Return a variant of FILE-NAME that is valid on MS-DOS filesystems.
+
+This function is for those rare cases where `convert-standard-filename'
+does not do a job that is good enough, e.g. if you need to preserve the
+file-name extension. It recognizes only certain specific file names
+that are used in Emacs Lisp sources; any other file name will be
+returned unaltered."
+ (cond
+ ;; See files.el:dir-locals-file.
+ ((string= file-name ".dir-locals.el")
+ "_dir-locals.el")
+ (t
+ file-name)))
+
;; See dos-vars.el for defcustom.
(defvar msdos-shells)
-;;; Override setting chosen at startup.
+;; Override settings chosen at startup.
(defun set-default-process-coding-system ()
(setq default-process-coding-system
- (if default-enable-multibyte-characters
+ (if (default-value 'enable-multibyte-characters)
'(undecided-dos . undecided-dos)
'(raw-text-dos . raw-text-dos))))
(add-hook 'before-init-hook 'set-default-process-coding-system)
+;; File names defined in preloaded packages can be incorrect or
+;; invalid if long file names were available during dumping, but not
+;; at runtime, or vice versa, and if the default file name begins with
+;; a period. Their defcustom's need to be reevaluated at startup. To
+;; see if the list of defcustom's below is up to date, run the command
+;; "M-x apropos-value RET ~/\. RET".
+(defun dos-reevaluate-defcustoms ()
+ ;; This is not needed in Emacs 23.2 and later, as trash-directory is
+ ;; initialized as nil. But something like this might become
+ ;; necessary in the future, so I'm keeping it here as a reminder.
+ ;(custom-reevaluate-setting 'trash-directory)
+ )
+
+(add-hook 'before-init-hook 'dos-reevaluate-defcustoms)
+
(defvar register-name-alist
'((ax . 0) (bx . 1) (cx . 2) (dx . 3) (si . 4) (di . 5)
(cflag . 6) (flags . 7)
(provide 'dos-fns)
-;;; arch-tag: 00b03579-8ebb-4a02-8762-5c5a929774ad
+;; arch-tag: 00b03579-8ebb-4a02-8762-5c5a929774ad
;;; dos-fns.el ends here