;;; dos-fns.el --- MS-Dos specific functions.
-;; Copyright (C) 1991, 1993, 1995 Free Software Foundation, Inc.
+;; Copyright (C) 1991, 1993, 1995, 1996 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.
;;; Code:
-;;; Add %t: into the mode line format just after the open-paren.
-(let ((tail (member " %[(" mode-line-format)))
- (setcdr tail (cons (purecopy "%t:")
- (cdr tail))))
-
-;; Use ";" instead of ":" as a path separator (from files.el).
-(setq path-separator ";")
-
-;; Set the null device (for compile.el).
-(setq grep-null-device "NUL")
-
-;; Set the grep regexp to match entries with drive letters.
-(setq grep-regexp-alist
- '(("^\\(\\([a-zA-Z]:\\)?[^:( \t\n]+\\)[:( \t]+\\([0-9]+\\)[:) \t]" 1 3)))
-
;; 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 function's standard definition is trivial; it just returns the argument.
However, on some systems, the function is redefined
with a definition that really does change some file names."
- (let ((dir (file-name-directory filename))
- (string (copy-sequence (file-name-nondirectory filename)))
- i firstdot)
- ;; Change a leading period to a leading underscore.
- (if (= (aref string 0) ?.)
- (aset string 0 ?_))
- ;; Get rid of invalid characters.
- (while (setq i (string-match "[^a-zA-Z0-9_.%~]" string))
- (aset string i ?_))
- ;; If we don't have a period,
- ;; and we have a dash or underscore that isn't the first char,
- ;; change that to a period.
- (if (and (not (string-match "\\." string))
- (setq i (string-match "[-_]" string 1)))
- (aset string i ?\.))
- ;; If we don't have a period in the first 8 chars, insert one.
- (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.
- (while (string-match "\\." string (1+ firstdot))
- (setq i (string-match "\\." string (1+ firstdot)))
- (aset string i ?_))
- (concat dir string)))
-
-(defvar file-name-buffer-file-type-alist
- '(
- ("[:/].*config.sys$" . nil) ; config.sys text
- ("\\.elc$" . t) ; emacs stuff
- ("\\.\\(obj\\|exe\\|com\\|lib\\|sys\\|chk\\|out\\|bin\\|ico\\|pif\\)$" . t)
- ; MS-Dos stuff
- ("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . t)
- ; Packers
- ("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\)$" . t)
- ; Unix stuff
- ("\\.tp[ulpw]$" . t)
- ; Borland Pascal stuff
- ("[:/]tags$" . t)
- ; Emacs TAGS file
- )
- "*Alist for distinguishing text files from binary files.
-Each element has the form (REGEXP . TYPE), where REGEXP is matched
-against the file name, and TYPE is nil for text, t for binary.")
-
-(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 found
- (cond((memq code '(nil t)) code)
- ((and (symbolp code) (fboundp code))
- (funcall code filename)))
- default-buffer-file-type)))
-
-(defun find-file-binary (filename)
- "Visit file FILENAME and treat it as binary."
- (interactive "FFind file binary: ")
- (let ((file-name-buffer-file-type-alist '(("" . t))))
- (find-file filename)))
-
-(defun find-file-text (filename)
- "Visit file FILENAME and treat it as a text file."
- (interactive "FFind file text: ")
- (let ((file-name-buffer-file-type-alist '(("" . nil))))
- (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)
-
-(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-alist
+ (if (or (msdos-long-file-names)
+ (not (stringp filename))
+ (member (file-name-nondirectory filename) '("" "." "..")))
+ filename
+ (let* ((dir (file-name-directory filename))
+ (string (copy-sequence (file-name-nondirectory filename)))
+ (lastchar (aref string (1- (length string))))
+ i firstdot)
+ ;; Change a leading period to a leading underscore.
+ (if (= (aref string 0) ?.)
+ (aset string 0 ?_))
+ ;; 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,
+ ;; and we have a dash or underscore that isn't the first char,
+ ;; change that to a period.
+ (if (and (not (string-match "\\." string))
+ (setq i (string-match "[-_]" string 1)))
+ (aset string i ?\.))
+ ;; If we don't have a period in the first 8 chars, insert one.
+ (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.
+ (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 `~',
+ ;; make sure the munged name ends with it also.
+ (if (equal lastchar ?~)
+ (aset string (1- (length string)) lastchar))
+ (concat dir string))))
+
+;; See dos-vars.el for defcustom.
+(defvar msdos-shells)
+
+(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))
(defsubst intdos (regs)
(int86 33 regs))
-;; Extra stub to functions in src/frame.c
-;; Emacs aborts during dump if the following don't have a doc string.
-(defun window-frame (window)
- "Return the frame that WINDOW resides on."
- (selected-frame))
-(defun raise-frame (frame)
- "Raise FRAME to the top of the desktop."
- nil)
-(defun select-frame (frame &optional no-enter)
- "Select FRAME for input events."
- (selected-frame))
+;; 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)
+
+; dos-fns.el ends here