[HAVE_NTGUI] (do_scrolling, do_direct_scrolling): Update frame geometry.
[bpt/emacs.git] / lisp / dos-fns.el
1 ;;; dos-fns.el --- MS-Dos specific functions.
2
3 ;; Copyright (C) 1991, 1993 Free Software Foundation, Inc.
4
5 ;; Maintainer: Morten Welinder (terra@diku.dk)
6 ;; Keywords: internal
7
8 ;; This file is part of GNU Emacs.
9
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)
13 ;; any later version.
14
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.
19
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.
23
24 ;;; Commentary:
25
26 ;; Part of this code is taken from (or derived from) demacs.
27
28 ;;; Code:
29
30 (setq-default mode-line-format
31 (list (purecopy "")
32 'mode-line-modified
33 'mode-line-buffer-identification
34 (purecopy " ")
35 'global-mode-string
36 (purecopy " %[(")
37 (purecopy "%t:")
38 'mode-name 'mode-line-process 'minor-mode-alist
39 (purecopy "%n")
40 (purecopy ")%]--")
41 (purecopy '(line-number-mode "L%l--"))
42 (purecopy '(-3 . "%p"))
43 (purecopy "-%-")))
44
45 ;; Use ";" instead of ":" as a path separator (from files.el).
46 (setq path-separator ";")
47
48 ;; Set the null device (for compile.el).
49 (setq grep-null-device "NUL")
50
51 ;; Set the grep regexp to match entries with drive letters.
52 (setq grep-regexp-alist
53 '(("^\\(\\([a-zA-Z]:\\)?[^:( \t\n]+\\)[:( \t]+\\([0-9]+\\)[:) \t]" 1 3)))
54
55 (defvar file-name-buffer-file-type-alist
56 '(
57 ("[:/].*config.sys$" . nil) ; config.sys text
58 ("\\.elc$" . t) ; emacs stuff
59 ("\\.\\(obj\\|exe\\|com\\|lib\\|sys\\|chk\\|out\\|bin\\|ico\\|pif\\)$" . t)
60 ; MS-Dos stuff
61 ("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . t)
62 ; Packers
63 ("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\)$" . t)
64 ; Unix stuff
65 ("\\.tp[ulpw]$" . t)
66 ; Borland Pascal stuff
67 ("[:/]tags$" . t)
68 ; Emacs TAGS file
69 )
70 "*Alist for distinguishing text files from binary files.
71 Each element has the form (REGEXP . TYPE), where REGEXP is matched
72 against the file name, and TYPE is nil for text, t for binary.")
73
74 (defun find-buffer-file-type (filename)
75 (let ((alist file-name-buffer-file-type-alist)
76 (found nil)
77 (code nil))
78 (let ((case-fold-search t))
79 (setq filename (file-name-sans-versions filename))
80 (while (and (not found) alist)
81 (if (string-match (car (car alist)) filename)
82 (setq code (cdr (car alist))
83 found t))
84 (setq alist (cdr alist))))
85 (if found
86 (cond((memq code '(nil t)) code)
87 ((and (symbolp code) (fboundp code))
88 (funcall code filename)))
89 default-buffer-file-type)))
90
91 (defun find-file-binary (filename)
92 "Visit file FILENAME and treat it as binary."
93 (interactive "FFind file binary: ")
94 (let ((file-name-buffer-file-type-alist '(("" . t))))
95 (find-file filename)))
96
97 (defun find-file-text (filename)
98 "Visit file FILENAME and treat it as a text file."
99 (interactive "FFind file text: ")
100 (let ((file-name-buffer-file-type-alist '(("" . nil))))
101 (find-file filename)))
102
103 (defun find-file-not-found-set-buffer-file-type ()
104 (save-excursion
105 (set-buffer (current-buffer))
106 (setq buffer-file-type (find-buffer-file-type (buffer-file-name))))
107 nil)
108
109 ;;; To set the default file type on new files.
110 (add-hook 'find-file-not-found-hooks 'find-file-not-found-set-buffer-file-type)
111
112 (defvar msdos-shells '("command.com" "4dos.com" "ndos.com")
113 "*List of shells that use `/c' instead of `-c' and a backslashed command.")
114
115 (defconst register-name-alist
116 '((ax . 0) (bx . 1) (cx . 2) (dx . 3) (si . 4) (di . 5)
117 (cflag . 6) (flags . 7)
118 (al . (0 . 0)) (bl . (1 . 0)) (cl . (2 . 0)) (dl . (3 . 0))
119 (ah . (0 . 1)) (bh . (1 . 1)) (ch . (2 . 1)) (dh . (3 . 1))))
120
121 (defun make-register ()
122 (make-vector 8 0))
123
124 (defun register-value (regs name)
125 (let ((where (cdr (assoc name register-name-alist))))
126 (cond ((consp where)
127 (let ((tem (aref regs (car where))))
128 (if (zerop (cdr where))
129 (% tem 256)
130 (/ tem 256))))
131 ((numberp where)
132 (aref regs where))
133 (t nil))))
134
135 (defun set-register-value (regs name value)
136 (and (numberp value)
137 (>= value 0)
138 (let ((where (cdr (assoc name register-name-alist))))
139 (cond ((consp where)
140 (let ((tem (aref regs (car where)))
141 (value (logand value 255)))
142 (aset regs
143 (car where)
144 (if (zerop (cdr where))
145 (logior (logand tem 65280) value)
146 (logior (logand tem 255) (lsh value 8))))))
147 ((numberp where)
148 (aset regs where (logand value 65535))))))
149 regs)
150
151 (defsubst intdos (regs)
152 (int86 33 regs))
153
154 ;; Extra stub to functions in src/frame.c
155 ;; Emacs aborts during dump if the following don't have a doc string.
156 (defun window-frame (window)
157 "Return the frame that WINDOW resides on."
158 (selected-frame))
159 (defun raise-frame (frame)
160 "Raise FRAME to the top of the desktop."
161 nil)
162 (defun select-frame (frame &optional no-enter)
163 "Select FRAME for input events."
164 (selected-frame))