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007c61fa RS |
1 | ;;; dos-fns.el --- MS-Dos specific functions. |
2 | ||
3aaa90ef | 3 | ;; Copyright (C) 1991, 1993 Free Software Foundation, Inc. |
007c61fa RS |
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:") | |
21f2acd3 RS |
38 | 'mode-name 'mode-line-process 'minor-mode-alist |
39 | (purecopy "%n") | |
007c61fa RS |
40 | (purecopy ")%]--") |
41 | (purecopy '(line-number-mode "L%l--")) | |
42 | (purecopy '(-3 . "%p")) | |
43 | (purecopy "-%-"))) | |
44 | ||
35d6dd87 RS |
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 | ||
007c61fa RS |
55 | (defvar file-name-buffer-file-type-alist |
56 | '( | |
594cabd7 RS |
57 | ("[:/].*config.sys$" . nil) ; config.sys text |
58 | ("\\.elc$" . t) ; emacs stuff | |
59 | ("\\.\\(obj\\|exe\\|com\\|lib\\|sys\\|chk\\|out\\|bin\\|ico\\|pif\\)$" . t) | |
007c61fa | 60 | ; MS-Dos stuff |
594cabd7 | 61 | ("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . t) |
007c61fa | 62 | ; Packers |
594cabd7 | 63 | ("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\)$" . t) |
007c61fa | 64 | ; Unix stuff |
594cabd7 | 65 | ("\\.tp[ulpw]$" . t) |
007c61fa | 66 | ; Borland Pascal stuff |
21f2acd3 | 67 | ("[:/]tags$" . t) |
007c61fa | 68 | ; Emacs TAGS file |
594cabd7 RS |
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.") | |
007c61fa RS |
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)))) | |
594cabd7 RS |
85 | (if found |
86 | (cond((memq code '(nil t)) code) | |
007c61fa RS |
87 | ((and (symbolp code) (fboundp code)) |
88 | (funcall code filename))) | |
89 | default-buffer-file-type))) | |
90 | ||
91 | (defun find-file-binary (filename) | |
594cabd7 | 92 | "Visit file FILENAME and treat it as binary." |
007c61fa | 93 | (interactive "FFind file binary: ") |
594cabd7 | 94 | (let ((file-name-buffer-file-type-alist '(("" . t)))) |
007c61fa RS |
95 | (find-file filename))) |
96 | ||
97 | (defun find-file-text (filename) | |
594cabd7 | 98 | "Visit file FILENAME and treat it as a text file." |
007c61fa | 99 | (interactive "FFind file text: ") |
594cabd7 | 100 | (let ((file-name-buffer-file-type-alist '(("" . nil)))) |
007c61fa RS |
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 | ||
007c61fa RS |
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 | ||
21f2acd3 | 115 | (defconst register-name-alist |
007c61fa | 116 | '((ax . 0) (bx . 1) (cx . 2) (dx . 3) (si . 4) (di . 5) |
21f2acd3 RS |
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)))) | |
007c61fa RS |
120 | |
121 | (defun make-register () | |
122 | (make-vector 8 0)) | |
123 | ||
124 | (defun register-value (regs name) | |
21f2acd3 | 125 | (let ((where (cdr (assoc name register-name-alist)))) |
007c61fa RS |
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) | |
21f2acd3 RS |
137 | (>= value 0) |
138 | (let ((where (cdr (assoc name register-name-alist)))) | |
007c61fa | 139 | (cond ((consp where) |
21f2acd3 RS |
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)))))) | |
007c61fa | 147 | ((numberp where) |
21f2acd3 | 148 | (aset regs where (logand value 65535)))))) |
007c61fa RS |
149 | regs) |
150 | ||
151 | (defsubst intdos (regs) | |
152 | (int86 33 regs)) | |
153 | ||
87485d6f MW |
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)) |