-;;; dos-fns.el --- MS-Dos specific functions.
+;;; dos-fns.el --- MS-Dos specific functions
-;; Copyright (C) 1991, 1993 Free Software Foundation, Inc.
+;; Copyright (C) 1991, 1993, 1995, 1996, 2002, 2003, 2004,
+;; 2005, 2006 Free Software Foundation, Inc.
-;; Maintainer: Morten Welinder (terra@diku.dk)
+;; Maintainer: Morten Welinder <terra@diku.dk>
;; Keywords: internal
;; This file is part of GNU Emacs.
;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; 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.
;;; Commentary:
;;; Code:
-(setq-default mode-line-format
- (list (purecopy "")
- 'mode-line-modified
- 'mode-line-buffer-identification
- (purecopy " ")
- 'global-mode-string
- (purecopy " %[(")
- (purecopy "%t:")
- 'mode-name 'minor-mode-alist "%n" 'mode-line-process
- (purecopy ")%]--")
- (purecopy '(line-number-mode "L%l--"))
- (purecopy '(-3 . "%p"))
- (purecopy "-%-")))
-
-;;
-;; buffer-file-type (0 "text") (1 "binary")
-;;
-(defvar file-name-buffer-file-type-alist
- '(
- ("[:/].*config.sys$" . 0) ; config.sys text
- ("\\.elc$" . 1) ; emacs stuff
- ("\\.\\(obj\\|exe\\|com\\|lib\\|sys\\|chk\\|out\\|bin\\|ico\\|pif\\)$" . 1)
- ; MS-Dos stuff
- ("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . 1)
- ; Packers
- ("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\)$" . 1)
- ; Unix stuff
- ("\\.tp[ulpw]$" . 1)
- ; Borland Pascal stuff
- ("[:/]tags$" . 1 )
- ; Emacs TAGS file
- ))
-
-(defun find-buffer-file-type (filename)
- (let ((alist file-name-buffer-file-type-alist)
- (found nil)
- (code nil))
- (let ((case-fold-search t))
- (setq filename (file-name-sans-versions filename))
- (while (and (not found) alist)
- (if (string-match (car (car alist)) filename)
- (setq code (cdr (car alist))
- found t))
- (setq alist (cdr alist))))
- (if code
- (cond((numberp code) code)
- ((and (symbolp code) (fboundp code))
- (funcall code filename)))
- default-buffer-file-type)))
-
-(defun find-file-binary (filename)
- "Like find-file but always load the file as binary."
- (interactive "FFind file binary: ")
- (let ((file-name-buffer-file-type-alist '(("" . 1))))
- (find-file filename)))
-
-(defun find-file-text (filename)
- "Like find-file but always load the file as text."
- (interactive "FFind file text: ")
- (let ((file-name-buffer-file-type-alist '(("" . 0))))
- (find-file filename)))
-
-(defun find-file-not-found-set-buffer-file-type ()
- (save-excursion
- (set-buffer (current-buffer))
- (setq buffer-file-type (find-buffer-file-type (buffer-file-name))))
- nil)
-
-;;; To set the default file type on new files.
-(add-hook 'find-file-not-found-hooks 'find-file-not-found-set-buffer-file-type)
-
-;;; We use the Emacs directory, not /usr/local
-(setq Info-default-directory-list (list "c:/emacs/info"))
-
-(defvar msdos-shells '("command.com" "4dos.com" "ndos.com")
- "*List of shells that use `/c' instead of `-c' and a backslashed command.")
-
-(defconst register-name-by-word-alist
- '((ax . 0) (bx . 1) (cx . 2) (dx . 3) (si . 4) (di . 5)
- (cflag . 6) (flags . 7)))
+;; 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.
+This means to guarantee valid names and perhaps to canonicalize
+certain patterns.
+
+On Windows and DOS, replace invalid characters. On DOS, make
+sure to obey the 8.3 limitations. On Windows, turn Cygwin names
+into native names, and also turn slashes into backslashes if the
+shell requires it (see `w32-shell-dos-semantics')."
+ (if (or (not (stringp filename))
+ ;; This catches the case where FILENAME is "x:" or "x:/" or
+ ;; "/", thus preventing infinite recursion.
+ (string-match "\\`\\([a-zA-Z]:\\)?[/\\]?\\'" filename))
+ filename
+ (let ((flen (length filename)))
+ ;; If FILENAME has a trailing slash, remove it and recurse.
+ (if (memq (aref filename (1- flen)) '(?/ ?\\))
+ (concat (convert-standard-filename
+ (substring filename 0 (1- flen)))
+ "/")
+ (let* (;; ange-ftp gets in the way for names like "/foo:bar".
+ ;; We need to inhibit all magic file names, because
+ ;; remote file names should never be passed through
+ ;; this function, as they are not meant for the local
+ ;; filesystem!
+ (file-name-handler-alist nil)
+ (dir
+ ;; If FILENAME is "x:foo", file-name-directory returns
+ ;; "x:/bar/baz", substituting the current working
+ ;; directory on drive x:. We want to be left with "x:"
+ ;; instead.
+ (if (and (< 1 flen)
+ (eq (aref filename 1) ?:)
+ (null (string-match "[/\\]" filename)))
+ (substring filename 0 2)
+ (file-name-directory filename)))
+ (dlen-m-1 (1- (length dir)))
+ (string (copy-sequence (file-name-nondirectory filename)))
+ (lastchar (aref string (1- (length string))))
+ i firstdot)
+ (cond
+ ((msdos-long-file-names)
+ ;; Replace characters that are invalid even on Windows.
+ (while (setq i (string-match "[?*:<>|\"\000-\037]" string))
+ (aset string i ?!)))
+ ((not (member string '("" "." "..")))
+ ;; Change a leading period to a leading underscore.
+ (if (= (aref string 0) ?.)
+ (aset string 0 ?_))
+ ;; If the name is longer than 8 chars, and doesn't have a
+ ;; period, and we have a dash or underscore that isn't too
+ ;; close to the beginning, change that to a period. This
+ ;; is so we could salvage more characters of the original
+ ;; name by pushing them into the extension.
+ (if (and (not (string-match "\\." string))
+ (> (length string) 8)
+ ;; We don't gain anything if we put the period closer
+ ;; than 5 chars from the beginning (5 + 3 = 8).
+ (setq i (string-match "[-_]" string 5)))
+ (aset string i ?\.))
+ ;; Get rid of invalid characters.
+ (while (setq i (string-match
+ "[^-a-zA-Z0-9_.%~^$!#&{}@`'()\200-\376]"
+ string))
+ (aset string i ?_))
+ ;; If we don't have a period in the first 8 chars, insert one.
+ ;; This enables to have 3 more characters from the original
+ ;; name in the extension.
+ (if (> (or (string-match "\\." string) (length string))
+ 8)
+ (setq string
+ (concat (substring string 0 8)
+ "."
+ (substring string 8))))
+ (setq firstdot (or (string-match "\\." string)
+ (1- (length string))))
+ ;; Truncate to 3 chars after the first period.
+ (if (> (length string) (+ firstdot 4))
+ (setq string (substring string 0 (+ firstdot 4))))
+ ;; Change all periods except the first one into underscores.
+ ;; (DOS doesn't allow more than one period.)
+ (while (string-match "\\." string (1+ firstdot))
+ (setq i (string-match "\\." string (1+ firstdot)))
+ (aset string i ?_))
+ ;; If the last character of the original filename was `~' or `#',
+ ;; make sure the munged name ends with it also. This is so that
+ ;; backup and auto-save files retain their telltale form.
+ (if (memq lastchar '(?~ ?#))
+ (aset string (1- (length string)) lastchar))))
+ (concat (if (and (stringp dir)
+ (memq (aref dir dlen-m-1) '(?/ ?\\)))
+ (concat (convert-standard-filename
+ (substring dir 0 dlen-m-1))
+ "/")
+ (convert-standard-filename dir))
+ string))))))
+
+(defun dos-8+3-filename (filename)
+ "Truncate FILENAME to DOS 8+3 limits."
+ (if (or (not (stringp filename))
+ (< (length filename) 5)) ; too short to give any trouble
+ filename
+ (let ((flen (length filename)))
+ ;; If FILENAME has a trailing slash, remove it and recurse.
+ (if (memq (aref filename (1- flen)) '(?/ ?\\))
+ (concat (dos-8+3-filename (substring filename 0 (1- flen)))
+ "/")
+ (let* (;; ange-ftp gets in the way for names like "/foo:bar".
+ ;; We need to inhibit all magic file names, because
+ ;; remote file names should never be passed through
+ ;; this function, as they are not meant for the local
+ ;; filesystem!
+ (file-name-handler-alist nil)
+ (dir
+ ;; If FILENAME is "x:foo", file-name-directory returns
+ ;; "x:/bar/baz", substituting the current working
+ ;; directory on drive x:. We want to be left with "x:"
+ ;; instead.
+ (if (and (< 1 flen)
+ (eq (aref filename 1) ?:)
+ (null (string-match "[/\\]" filename)))
+ (substring filename 0 2)
+ (file-name-directory filename)))
+ (dlen-m-1 (1- (length dir)))
+ (string (copy-sequence (file-name-nondirectory filename)))
+ (strlen (length string))
+ (lastchar (aref string (1- strlen)))
+ i firstdot)
+ (setq firstdot (string-match "\\." string))
+ (cond
+ (firstdot
+ ;; Truncate the extension to 3 characters.
+ (if (> strlen (+ firstdot 4))
+ (setq string (substring string 0 (+ firstdot 4))))
+ ;; Truncate the basename to 8 characters.
+ (if (> firstdot 8)
+ (setq string (concat (substring string 0 8)
+ "."
+ (substring string (1+ firstdot))))))
+ ((> strlen 8)
+ ;; No dot; truncate file name to 8 characters.
+ (setq string (substring string 0 8))))
+ ;; If the last character of the original filename was `~',
+ ;; make sure the munged name ends with it also. This is so
+ ;; a backup file retains its final `~'.
+ (if (equal lastchar ?~)
+ (aset string (1- (length string)) lastchar))
+ (concat (if (and (stringp dir)
+ (memq (aref dir dlen-m-1) '(?/ ?\\)))
+ (concat (dos-8+3-filename (substring dir 0 dlen-m-1))
+ "/")
+ ;; Recurse to truncate the leading directories.
+ (dos-8+3-filename dir))
+ string))))))
-(defconst register-name-by-byte-alist
- '((al . (0 . 0)) (ah . (0 . 1))
- (bl . (1 . 0)) (bh . (1 . 1))
- (cl . (2 . 0)) (ch . (2 . 1))
- (dl . (3 . 0)) (dh . (3 . 1))))
+;; See dos-vars.el for defcustom.
+(defvar msdos-shells)
+
+;;; Override setting chosen at startup.
+(defun set-default-process-coding-system ()
+ (setq default-process-coding-system
+ (if default-enable-multibyte-characters
+ '(undecided-dos . undecided-dos)
+ '(raw-text-dos . raw-text-dos))))
+
+(add-hook 'before-init-hook 'set-default-process-coding-system)
+
+(defvar register-name-alist
+ '((ax . 0) (bx . 1) (cx . 2) (dx . 3) (si . 4) (di . 5)
+ (cflag . 6) (flags . 7)
+ (al . (0 . 0)) (bl . (1 . 0)) (cl . (2 . 0)) (dl . (3 . 0))
+ (ah . (0 . 1)) (bh . (1 . 1)) (ch . (2 . 1)) (dh . (3 . 1))))
(defun make-register ()
(make-vector 8 0))
(defun register-value (regs name)
- (let ((where (or (cdr (assoc name register-name-by-word-alist))
- (cdr (assoc name register-name-by-byte-alist)))))
+ (let ((where (cdr (assoc name register-name-alist))))
(cond ((consp where)
(let ((tem (aref regs (car where))))
(if (zerop (cdr where))
(defun set-register-value (regs name value)
(and (numberp value)
- (> value 0)
- (let ((where (or (cdr (assoc name register-name-by-word-alist))
- (cdr (assoc name register-name-by-byte-alist)))))
+ (>= value 0)
+ (let ((where (cdr (assoc name register-name-alist))))
(cond ((consp where)
- (setq value (% value 256)) ; 0x100
- (let* ((tem (aref regs (car where)))
- (l (% tem 256))
- (h (/ tem 256)))
- (if (zerop (cdr where))
- (aset regs (car where) (+ (* h 256) value))
- (aset regs (car where) (+ (* value 256) h)))))
+ (let ((tem (aref regs (car where)))
+ (value (logand value 255)))
+ (aset regs
+ (car where)
+ (if (zerop (cdr where))
+ (logior (logand tem 65280) value)
+ (logior (logand tem 255) (lsh value 8))))))
((numberp where)
- (setq value (% value 65536)) ; 0x10000
- (aset regs where value)))))
+ (aset regs where (logand value 65535))))))
regs)
(defsubst intdos (regs)
(int86 33 regs))
-;;; Fix interface to (X-specific) mouse.el
-(defalias 'window-frame 'ignore)
-(defalias 'x-set-selection 'ignore)
-(fset 'x-get-selection '(lambda (&rest rest) ""))
-(fset 'frame-parameters 'ignore)
-(fmakunbound 'font-menu-add-default)
-(global-unset-key [C-down-mouse-1])
-(global-unset-key [C-down-mouse-2])
-(global-unset-key [C-down-mouse-3])
+;; Backward compatibility for obsolescent functions which
+;; set screen size.
+
+(defun mode25 ()
+ "Changes the number of screen rows to 25."
+ (interactive)
+ (set-frame-size (selected-frame) 80 25))
+
+(defun mode4350 ()
+ "Changes the number of rows to 43 or 50.
+Emacs always tries to set the screen height to 50 rows first.
+If this fails, it will try to set it to 43 rows, on the assumption
+that your video hardware might not support 50-line mode."
+ (interactive)
+ (set-frame-size (selected-frame) 80 50)
+ (if (eq (frame-height (selected-frame)) 50)
+ nil ; the original built-in function returned nil
+ (set-frame-size (selected-frame) 80 43)))
+
+(provide 'dos-fns)
+
+;;; arch-tag: 00b03579-8ebb-4a02-8762-5c5a929774ad
+;;; dos-fns.el ends here