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007c61fa RS |
1 | ;;; dos-fns.el --- MS-Dos specific functions. |
2 | ||
9596811a | 3 | ;; Copyright (C) 1991, 1993, 1995, 1996 Free Software Foundation, Inc. |
007c61fa | 4 | |
0acdb863 | 5 | ;; Maintainer: Morten Welinder <terra@diku.dk> |
007c61fa RS |
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 | |
b578f267 EN |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | ;; Boston, MA 02111-1307, USA. | |
007c61fa RS |
24 | |
25 | ;;; Commentary: | |
26 | ||
27 | ;; Part of this code is taken from (or derived from) demacs. | |
28 | ||
29 | ;;; Code: | |
30 | ||
4bef9110 SE |
31 | (defgroup dos-fns nil |
32 | "MS-Dos specific functions." | |
33 | :group 'environment) | |
34 | ||
44998f5b RS |
35 | ;; This overrides a trivial definition in files.el. |
36 | (defun convert-standard-filename (filename) | |
37 | "Convert a standard file's name to something suitable for the current OS. | |
38 | This function's standard definition is trivial; it just returns the argument. | |
39 | However, on some systems, the function is redefined | |
40 | with a definition that really does change some file names." | |
9c777199 RS |
41 | (if (or (msdos-long-file-names) |
42 | (not (stringp filename)) | |
43 | (member (file-name-nondirectory filename) '("" "." ".."))) | |
44 | filename | |
45 | (let* ((dir (file-name-directory filename)) | |
46 | (string (copy-sequence (file-name-nondirectory filename))) | |
47 | (lastchar (aref string (1- (length string)))) | |
48 | i firstdot) | |
9c777199 RS |
49 | ;; Change a leading period to a leading underscore. |
50 | (if (= (aref string 0) ?.) | |
51 | (aset string 0 ?_)) | |
52 | ;; Get rid of invalid characters. | |
53 | (while (setq i (string-match | |
54 | "[^-a-zA-Z0-9_.%~^$!#&{}@`'()\200-\376]" | |
55 | string)) | |
56 | (aset string i ?_)) | |
57 | ;; If we don't have a period, | |
58 | ;; and we have a dash or underscore that isn't the first char, | |
59 | ;; change that to a period. | |
60 | (if (and (not (string-match "\\." string)) | |
61 | (setq i (string-match "[-_]" string 1))) | |
62 | (aset string i ?\.)) | |
63 | ;; If we don't have a period in the first 8 chars, insert one. | |
64 | (if (> (or (string-match "\\." string) | |
65 | (length string)) | |
66 | 8) | |
67 | (setq string | |
68 | (concat (substring string 0 8) | |
69 | "." | |
70 | (substring string 8)))) | |
71 | (setq firstdot (or (string-match "\\." string) (1- (length string)))) | |
72 | ;; Truncate to 3 chars after the first period. | |
73 | (if (> (length string) (+ firstdot 4)) | |
74 | (setq string (substring string 0 (+ firstdot 4)))) | |
75 | ;; Change all periods except the first one into underscores. | |
76 | (while (string-match "\\." string (1+ firstdot)) | |
77 | (setq i (string-match "\\." string (1+ firstdot))) | |
78 | (aset string i ?_)) | |
79 | ;; If the last character of the original filename was `~', | |
80 | ;; make sure the munged name ends with it also. | |
81 | (if (equal lastchar ?~) | |
82 | (aset string (1- (length string)) lastchar)) | |
83 | (concat dir string)))) | |
44998f5b | 84 | |
4bef9110 SE |
85 | (defcustom msdos-shells '("command.com" "4dos.com" "ndos.com") |
86 | "*List of shells that use `/c' instead of `-c' and a backslashed command." | |
87 | :type '(repeat string) | |
88 | :group 'dos-fns) | |
007c61fa | 89 | |
cafef6ab | 90 | (defvar register-name-alist |
007c61fa | 91 | '((ax . 0) (bx . 1) (cx . 2) (dx . 3) (si . 4) (di . 5) |
21f2acd3 RS |
92 | (cflag . 6) (flags . 7) |
93 | (al . (0 . 0)) (bl . (1 . 0)) (cl . (2 . 0)) (dl . (3 . 0)) | |
94 | (ah . (0 . 1)) (bh . (1 . 1)) (ch . (2 . 1)) (dh . (3 . 1)))) | |
007c61fa RS |
95 | |
96 | (defun make-register () | |
97 | (make-vector 8 0)) | |
98 | ||
99 | (defun register-value (regs name) | |
21f2acd3 | 100 | (let ((where (cdr (assoc name register-name-alist)))) |
007c61fa RS |
101 | (cond ((consp where) |
102 | (let ((tem (aref regs (car where)))) | |
103 | (if (zerop (cdr where)) | |
104 | (% tem 256) | |
105 | (/ tem 256)))) | |
106 | ((numberp where) | |
107 | (aref regs where)) | |
108 | (t nil)))) | |
109 | ||
110 | (defun set-register-value (regs name value) | |
111 | (and (numberp value) | |
21f2acd3 RS |
112 | (>= value 0) |
113 | (let ((where (cdr (assoc name register-name-alist)))) | |
007c61fa | 114 | (cond ((consp where) |
21f2acd3 RS |
115 | (let ((tem (aref regs (car where))) |
116 | (value (logand value 255))) | |
117 | (aset regs | |
118 | (car where) | |
119 | (if (zerop (cdr where)) | |
120 | (logior (logand tem 65280) value) | |
121 | (logior (logand tem 255) (lsh value 8)))))) | |
007c61fa | 122 | ((numberp where) |
21f2acd3 | 123 | (aset regs where (logand value 65535)))))) |
007c61fa RS |
124 | regs) |
125 | ||
126 | (defsubst intdos (regs) | |
127 | (int86 33 regs)) | |
128 | ||
868c7abd | 129 | ;; Support for printing under MS-DOS, see lpr.el and ps-print.el. |
4bef9110 | 130 | (defcustom dos-printer "PRN" |
868c7abd RS |
131 | "*The name of a local MS-DOS device to which data is sent for printing. |
132 | \(Note that PostScript files are sent to `dos-ps-printer', which see.\) | |
133 | ||
134 | Typical non-default settings would be \"LPT1\" to \"LPT3\" for | |
135 | parallel printers, or \"COM1\" to \"COM4\" or \"AUX\" for serial | |
136 | printers. You can also set it to a name of a file, in which | |
137 | case the output gets appended to that file. | |
4bef9110 SE |
138 | If you want to discard the printed output, set this to \"NUL\"." |
139 | :type 'file ; could use string but then we lose completion for files. | |
140 | :group 'dos-fns) | |
868c7abd RS |
141 | |
142 | (defun dos-print-region-function (start end | |
143 | &optional lpr-prog | |
144 | delete-text buf display rest) | |
145 | "MS-DOS-specific function to print the region on a printer. | |
146 | Writes the region to the device or file which is a value of | |
147 | `dos-printer' \(which see\). Ignores any arguments beyond | |
148 | START and END." | |
149 | ||
7c96c058 | 150 | ;; DOS printers need the lines to end with CR-LF pairs, so make |
08160b08 EZ |
151 | ;; sure it always happens that way, unless the buffer is binary. |
152 | (let* ((coding coding-system-for-write) | |
153 | (coding-base | |
154 | (if (null coding) 'undecided (coding-system-base coding))) | |
155 | (eol-type (coding-system-eol-type coding-base))) | |
156 | (or (eq coding-system-for-write 'no-conversion) | |
157 | (setq coding-system-for-write | |
158 | (aref eol-type 1))) ; force conversion to DOS EOLs | |
7c96c058 RS |
159 | (write-region start end dos-printer t 0) |
160 | ;; Make each print-out start on a new page, but don't waste | |
161 | ;; paper if there was a form-feed at the end of this file. | |
162 | (if (not (char-equal (char-after (1- end)) ?\C-l)) | |
163 | (write-region "\f" nil dos-printer t 0)))) | |
868c7abd RS |
164 | |
165 | ;; Set this to nil if you have a port of the `lpr' program and | |
166 | ;; you want to use it for printing. If the default setting is | |
167 | ;; in effect, `lpr-command' and its switches are ignored when | |
168 | ;; printing with `lpr-xxx' and `print-xxx'. | |
169 | (setq print-region-function 'dos-print-region-function) | |
170 | ||
171 | ;; Set this to nil if you have a port of the `pr' program | |
172 | ;; (e.g., from GNU Textutils), or if you have an `lpr' | |
173 | ;; program (see above) that can print page headers. | |
174 | ;; If `lpr-headers-switches' is non-nil (the default) and | |
175 | ;; `print-region-function' is set to `dos-print-region-function', | |
176 | ;; then requests to print page headers will be silently | |
177 | ;; ignored, and `print-buffer' and `print-region' produce | |
178 | ;; the same output as `lpr-buffer' and `lpr-region', accordingly. | |
179 | (setq lpr-headers-switches "(page headers are not supported)") | |
180 | ||
4bef9110 | 181 | (defcustom dos-ps-printer "PRN" |
868c7abd RS |
182 | "*Method for printing PostScript files under MS-DOS. |
183 | ||
184 | If the value is a string, then it is taken as the name of the | |
185 | device to which PostScript files are written. By default it | |
186 | is the default printer device; typical non-default settings | |
187 | would be \"LPT1\" to \"LPT3\" for parallel printers, or \"COM1\" | |
188 | to \"COM4\" or \"AUX\" for serial printers. You can also set it | |
189 | to a name of a file, in which case the output gets appended | |
190 | to that file. \(Note that `ps-print' package already has | |
191 | facilities for printing to a file, so you might as well use | |
192 | them instead of changing the setting of this variable.\) If | |
193 | you want to silently discard the printed output, set this to \"NUL\". | |
194 | ||
195 | If the value is anything but a string, PostScript files will be | |
196 | piped to the program given by `ps-lpr-command', with switches | |
4bef9110 SE |
197 | given by `ps-lpr-switches', which see." |
198 | :type '(choice file (const :tag "Pipe to ps-lpr-command" pipe)) | |
199 | :group 'dos-fns) | |
868c7abd RS |
200 | |
201 | (setq ps-lpr-command "gs") | |
202 | ||
203 | (setq ps-lpr-switches '("-q" "-dNOPAUSE" "-sDEVICE=epson" "-r240x60" | |
204 | "-sOutputFile=LPT1" "-")) | |
205 | ||
70662974 RS |
206 | ;; Backward compatibility for obsolescent functions which |
207 | ;; set screen size. | |
208 | ||
209 | (defun mode25 () | |
210 | "Changes the number of screen rows to 25." | |
211 | (interactive) | |
212 | (set-frame-size (selected-frame) 80 25)) | |
213 | ||
214 | (defun mode4350 () | |
215 | "Changes the number of rows to 43 or 50. | |
216 | Emacs always tries to set the screen height to 50 rows first. | |
217 | If this fails, it will try to set it to 43 rows, on the assumption | |
218 | that your video hardware might not support 50-line mode." | |
219 | (interactive) | |
220 | (set-frame-size (selected-frame) 80 50) | |
221 | (if (eq (frame-height (selected-frame)) 50) | |
222 | nil ; the original built-in function returned nil | |
223 | (set-frame-size (selected-frame) 80 43))) | |
224 | ||
868c7abd RS |
225 | (provide 'dos-fns) |
226 | ||
227 | ; dos-fns.el ends here |