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- ;;; dos-fns.el --- MS-Dos specific functions.
-
- ;; Copyright (C) 1991, 1993 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
- ;; 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.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; 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.
-
- ;;; Commentary:
-
- ;; Part of this code is taken from (or derived from) demacs.
-
- ;;; Code:
-
- (setq-default mode-line-format
- (list (purecopy "")
- 'mode-line-modified
- 'mode-line-buffer-identification
- (purecopy " ")
- 'global-mode-string
- (purecopy " %[(")
- (purecopy "%t:")
- 'mode-name 'mode-line-process 'minor-mode-alist
- (purecopy "%n")
- (purecopy ")%]--")
- (purecopy '(line-number-mode "L%l--"))
- (purecopy '(-3 . "%p"))
- (purecopy "-%-")))
-
- (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)
-
- ;;; 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-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 (cdr (assoc name register-name-alist))))
- (cond ((consp where)
- (let ((tem (aref regs (car where))))
- (if (zerop (cdr where))
- (% tem 256)
- (/ tem 256))))
- ((numberp where)
- (aref regs where))
- (t nil))))
-
- (defun set-register-value (regs name value)
- (and (numberp value)
- (>= value 0)
- (let ((where (cdr (assoc name register-name-alist))))
- (cond ((consp where)
- (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)
- (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])
-