1 ;;; dos-fns.el --- MS-Dos specific functions.
3 ;; Copyright (C) 1991, 1993 Free Software Foundation, Inc.
5 ;; Maintainer: Morten Welinder (terra@diku.dk)
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to
22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 ;; Part of this code is taken from (or derived from) demacs.
30 ;;; Add %t: into the mode line format just after the open-paren.
31 (let ((tail (member " %[(" mode-line-format)))
32 (setcdr tail (cons (purecopy "%t:")
35 ;; Use ";" instead of ":" as a path separator (from files.el).
36 (setq path-separator ";")
38 ;; Set the null device (for compile.el).
39 (setq grep-null-device "NUL")
41 ;; Set the grep regexp to match entries with drive letters.
42 (setq grep-regexp-alist
43 '(("^\\(\\([a-zA-Z]:\\)?[^:( \t\n]+\\)[:( \t]+\\([0-9]+\\)[:) \t]" 1 3)))
45 ;; This overrides a trivial definition in files.el.
46 (defun convert-standard-filename (filename)
47 "Convert a standard file's name to something suitable for the current OS.
48 This function's standard definition is trivial; it just returns the argument.
49 However, on some systems, the function is redefined
50 with a definition that really does change some file names."
51 (let ((dir (file-name-directory filename))
52 (string (copy-sequence (file-name-nondirectory filename)))
54 ;; Change a leading period to a leading underscore.
55 (if (= (aref string 0) ?.)
57 ;; Get rid of invalid characters.
58 (while (setq i (string-match "[^a-zA-Z0-9_.%~]" string))
60 ;; If we don't have a period,
61 ;; and we have a dash or underscore that isn't the first char,
62 ;; change that to a period.
63 (if (and (not (string-match "\\." string))
64 (setq i (string-match "[-_]" string 1)))
66 ;; If we don't have a period in the first 8 chars, insert one.
67 (if (> (or (string-match "\\." string)
71 (concat (substring string 0 8)
73 (substring string 8))))
74 (setq firstdot (string-match "\\." string))
75 ;; Truncate to 3 chars after the first period.
76 (if (> (length string) (+ firstdot 4))
77 (setq string (substring string 0 (+ firstdot 4))))
78 ;; Change all periods except the first one into underscores.
79 (while (string-match "\\." string (1+ firstdot))
80 (setq i (string-match "\\." string (1+ firstdot)))
84 (defvar file-name-buffer-file-type-alist
86 ("[:/].*config.sys$" . nil) ; config.sys text
87 ("\\.elc$" . t) ; emacs stuff
88 ("\\.\\(obj\\|exe\\|com\\|lib\\|sys\\|chk\\|out\\|bin\\|ico\\|pif\\)$" . t)
90 ("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . t)
92 ("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\)$" . t)
95 ; Borland Pascal stuff
99 "*Alist for distinguishing text files from binary files.
100 Each element has the form (REGEXP . TYPE), where REGEXP is matched
101 against the file name, and TYPE is nil for text, t for binary.")
103 (defun find-buffer-file-type (filename)
104 (let ((alist file-name-buffer-file-type-alist)
107 (let ((case-fold-search t))
108 (setq filename (file-name-sans-versions filename))
109 (while (and (not found) alist)
110 (if (string-match (car (car alist)) filename)
111 (setq code (cdr (car alist))
113 (setq alist (cdr alist))))
115 (cond((memq code '(nil t)) code)
116 ((and (symbolp code) (fboundp code))
117 (funcall code filename)))
118 default-buffer-file-type)))
120 (defun find-file-binary (filename)
121 "Visit file FILENAME and treat it as binary."
122 (interactive "FFind file binary: ")
123 (let ((file-name-buffer-file-type-alist '(("" . t))))
124 (find-file filename)))
126 (defun find-file-text (filename)
127 "Visit file FILENAME and treat it as a text file."
128 (interactive "FFind file text: ")
129 (let ((file-name-buffer-file-type-alist '(("" . nil))))
130 (find-file filename)))
132 (defun find-file-not-found-set-buffer-file-type ()
134 (set-buffer (current-buffer))
135 (setq buffer-file-type (find-buffer-file-type (buffer-file-name))))
138 ;;; To set the default file type on new files.
139 (add-hook 'find-file-not-found-hooks 'find-file-not-found-set-buffer-file-type)
141 (defvar msdos-shells '("command.com" "4dos.com" "ndos.com")
142 "*List of shells that use `/c' instead of `-c' and a backslashed command.")
144 (defconst register-name-alist
145 '((ax . 0) (bx . 1) (cx . 2) (dx . 3) (si . 4) (di . 5)
146 (cflag . 6) (flags . 7)
147 (al . (0 . 0)) (bl . (1 . 0)) (cl . (2 . 0)) (dl . (3 . 0))
148 (ah . (0 . 1)) (bh . (1 . 1)) (ch . (2 . 1)) (dh . (3 . 1))))
150 (defun make-register ()
153 (defun register-value (regs name)
154 (let ((where (cdr (assoc name register-name-alist))))
156 (let ((tem (aref regs (car where))))
157 (if (zerop (cdr where))
164 (defun set-register-value (regs name value)
167 (let ((where (cdr (assoc name register-name-alist))))
169 (let ((tem (aref regs (car where)))
170 (value (logand value 255)))
173 (if (zerop (cdr where))
174 (logior (logand tem 65280) value)
175 (logior (logand tem 255) (lsh value 8))))))
177 (aset regs where (logand value 65535))))))
180 (defsubst intdos (regs)
183 ;; Extra stub to functions in src/frame.c
184 ;; Emacs aborts during dump if the following don't have a doc string.
185 (defun window-frame (window)
186 "Return the frame that WINDOW resides on."
188 (defun raise-frame (frame)
189 "Raise FRAME to the top of the desktop."
191 (defun select-frame (frame &optional no-enter)
192 "Select FRAME for input events."