mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-13 09:32:47 +00:00
190 lines
6.6 KiB
EmacsLisp
190 lines
6.6 KiB
EmacsLisp
;;; dos-fns.el --- MS-Dos specific functions.
|
|
|
|
;; Copyright (C) 1991, 1993, 1995, 1996 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, Inc., 59 Temple Place - Suite 330,
|
|
;; Boston, MA 02111-1307, USA.
|
|
|
|
;;; Commentary:
|
|
|
|
;; Part of this code is taken from (or derived from) demacs.
|
|
|
|
;;; Code:
|
|
|
|
;; This overrides a trivial definition in files.el.
|
|
(defun convert-standard-filename (filename)
|
|
"Convert a standard file's name to something suitable for the current OS.
|
|
This function's standard definition is trivial; it just returns the argument.
|
|
However, on some systems, the function is redefined
|
|
with a definition that really does change some file names."
|
|
(if (or (not (stringp filename))
|
|
;; This catches the case where FILENAME is "x:" or "x:/" or
|
|
;; "/", thus preventing infinite recursion.
|
|
(string-match "\\`\\([a-zA-Z]:\\)?[/\\]?\\'" filename))
|
|
filename
|
|
(let ((flen (length filename)))
|
|
;; If FILENAME has a trailing slash, remove it and recurse.
|
|
(if (memq (aref filename (1- flen)) '(?/ ?\\))
|
|
(concat (convert-standard-filename
|
|
(substring filename 0 (1- flen)))
|
|
"/")
|
|
(let* (;; ange-ftp gets in the way for names like "/foo:bar".
|
|
;; We need to inhibit all magic file names, because
|
|
;; remote file names should never be passed through
|
|
;; this function, as they are not meant for the local
|
|
;; filesystem!
|
|
(file-name-handler-alist nil)
|
|
(dir
|
|
;; If FILENAME is "x:foo", file-name-directory returns
|
|
;; "x:/bar/baz", substituting the current working
|
|
;; directory on drive x:. We want to be left with "x:"
|
|
;; instead.
|
|
(if (and (< 1 flen)
|
|
(eq (aref filename 1) ?:)
|
|
(null (string-match "[/\\]" filename)))
|
|
(substring filename 0 2)
|
|
(file-name-directory filename)))
|
|
(dlen-m-1 (1- (length dir)))
|
|
(string (copy-sequence (file-name-nondirectory filename)))
|
|
(lastchar (aref string (1- (length string))))
|
|
i firstdot)
|
|
(cond
|
|
((msdos-long-file-names)
|
|
;; Replace characters that are invalid even on Windows.
|
|
(while (setq i (string-match "[?*:<>|\"\000-\037]" string))
|
|
(aset string i ?!)))
|
|
((not (member string '("" "." "..")))
|
|
;; Change a leading period to a leading underscore.
|
|
(if (= (aref string 0) ?.)
|
|
(aset string 0 ?_))
|
|
;; Get rid of invalid characters.
|
|
(while (setq i (string-match
|
|
"[^-a-zA-Z0-9_.%~^$!#&{}@`'()\200-\376]"
|
|
string))
|
|
(aset string i ?_))
|
|
;; If we don't have a period,
|
|
;; and we have a dash or underscore that isn't the first char,
|
|
;; change that to a period.
|
|
(if (and (not (string-match "\\." string))
|
|
(setq i (string-match "[-_]" string 1)))
|
|
(aset string i ?\.))
|
|
;; If we don't have a period in the first 8 chars, insert one.
|
|
(if (> (or (string-match "\\." string) (length string))
|
|
8)
|
|
(setq string
|
|
(concat (substring string 0 8)
|
|
"."
|
|
(substring string 8))))
|
|
(setq firstdot (or (string-match "\\." string)
|
|
(1- (length string))))
|
|
;; Truncate to 3 chars after the first period.
|
|
(if (> (length string) (+ firstdot 4))
|
|
(setq string (substring string 0 (+ firstdot 4))))
|
|
;; Change all periods except the first one into underscores.
|
|
(while (string-match "\\." string (1+ firstdot))
|
|
(setq i (string-match "\\." string (1+ firstdot)))
|
|
(aset string i ?_))
|
|
;; If the last character of the original filename was `~',
|
|
;; make sure the munged name ends with it also. This is so
|
|
;; a backup file retains its final `~'.
|
|
(if (equal lastchar ?~)
|
|
(aset string (1- (length string)) lastchar))))
|
|
(concat (if (and (stringp dir)
|
|
(memq (aref dir dlen-m-1) '(?/ ?\\)))
|
|
(concat (convert-standard-filename
|
|
(substring dir 0 dlen-m-1))
|
|
"/")
|
|
(convert-standard-filename dir))
|
|
string))))))
|
|
|
|
;; See dos-vars.el for defcustom.
|
|
(defvar msdos-shells)
|
|
|
|
;;; Override setting chosen at startup.
|
|
(defun set-default-process-coding-system ()
|
|
(setq default-process-coding-system
|
|
(if default-enable-multibyte-characters
|
|
'(undecided-dos . undecided-dos)
|
|
'(raw-text-dos . raw-text-dos))))
|
|
|
|
(add-hook 'before-init-hook 'set-default-process-coding-system)
|
|
|
|
(defvar 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))
|
|
|
|
;; Backward compatibility for obsolescent functions which
|
|
;; set screen size.
|
|
|
|
(defun mode25 ()
|
|
"Changes the number of screen rows to 25."
|
|
(interactive)
|
|
(set-frame-size (selected-frame) 80 25))
|
|
|
|
(defun mode4350 ()
|
|
"Changes the number of rows to 43 or 50.
|
|
Emacs always tries to set the screen height to 50 rows first.
|
|
If this fails, it will try to set it to 43 rows, on the assumption
|
|
that your video hardware might not support 50-line mode."
|
|
(interactive)
|
|
(set-frame-size (selected-frame) 80 50)
|
|
(if (eq (frame-height (selected-frame)) 50)
|
|
nil ; the original built-in function returned nil
|
|
(set-frame-size (selected-frame) 80 43)))
|
|
|
|
(provide 'dos-fns)
|
|
|
|
; dos-fns.el ends here
|