X-Git-Url: https://git.hcoop.net/bpt/emacs.git/blobdiff_plain/87485d6fc91710d31c0ed046744f5f7a95f11115..71296446d3cec5bb2a27bc5ad6da574df38d0ec8:/lisp/dos-fns.el diff --git a/lisp/dos-fns.el b/lisp/dos-fns.el dissimilarity index 62% index 39cbbf2f12..ba2aff981e 100644 --- a/lisp/dos-fns.el +++ b/lisp/dos-fns.el @@ -1,154 +1,255 @@ -;;; dos-fns.el --- MS-Dos specific functions. - -;; Copyright (C) 1991, 1993 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, 675 Mass Ave, Cambridge, MA 02139, USA. - -;;; Commentary: - -;; Part of this code is taken from (or derived from) demacs. - -;;; Code: - -(setq-default mode-line-format - (list (purecopy "") - 'mode-line-modified - 'mode-line-buffer-identification - (purecopy " ") - 'global-mode-string - (purecopy " %[(") - (purecopy "%t:") - 'mode-name 'mode-line-process 'minor-mode-alist - (purecopy "%n") - (purecopy ")%]--") - (purecopy '(line-number-mode "L%l--")) - (purecopy '(-3 . "%p")) - (purecopy "-%-"))) - -(defvar file-name-buffer-file-type-alist - '( - ("[:/].*config.sys$" . nil) ; config.sys text - ("\\.elc$" . t) ; emacs stuff - ("\\.\\(obj\\|exe\\|com\\|lib\\|sys\\|chk\\|out\\|bin\\|ico\\|pif\\)$" . t) - ; MS-Dos stuff - ("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . t) - ; Packers - ("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\)$" . t) - ; Unix stuff - ("\\.tp[ulpw]$" . t) - ; Borland Pascal stuff - ("[:/]tags$" . t) - ; Emacs TAGS file - ) - "*Alist for distinguishing text files from binary files. -Each element has the form (REGEXP . TYPE), where REGEXP is matched -against the file name, and TYPE is nil for text, t for binary.") - -(defun find-buffer-file-type (filename) - (let ((alist file-name-buffer-file-type-alist) - (found nil) - (code nil)) - (let ((case-fold-search t)) - (setq filename (file-name-sans-versions filename)) - (while (and (not found) alist) - (if (string-match (car (car alist)) filename) - (setq code (cdr (car alist)) - found t)) - (setq alist (cdr alist)))) - (if found - (cond((memq code '(nil t)) code) - ((and (symbolp code) (fboundp code)) - (funcall code filename))) - default-buffer-file-type))) - -(defun find-file-binary (filename) - "Visit file FILENAME and treat it as binary." - (interactive "FFind file binary: ") - (let ((file-name-buffer-file-type-alist '(("" . t)))) - (find-file filename))) - -(defun find-file-text (filename) - "Visit file FILENAME and treat it as a text file." - (interactive "FFind file text: ") - (let ((file-name-buffer-file-type-alist '(("" . nil)))) - (find-file filename))) - -(defun find-file-not-found-set-buffer-file-type () - (save-excursion - (set-buffer (current-buffer)) - (setq buffer-file-type (find-buffer-file-type (buffer-file-name)))) - nil) - -;;; To set the default file type on new files. -(add-hook 'find-file-not-found-hooks 'find-file-not-found-set-buffer-file-type) - -(defvar msdos-shells '("command.com" "4dos.com" "ndos.com") - "*List of shells that use `/c' instead of `-c' and a backslashed command.") - -(defconst 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)) - -;; Extra stub to functions in src/frame.c -;; Emacs aborts during dump if the following don't have a doc string. -(defun window-frame (window) - "Return the frame that WINDOW resides on." - (selected-frame)) -(defun raise-frame (frame) - "Raise FRAME to the top of the desktop." - nil) -(defun select-frame (frame &optional no-enter) - "Select FRAME for input events." - (selected-frame)) +;;; dos-fns.el --- MS-Dos specific functions + +;; Copyright (C) 1991, 1993, 1995, 1996 Free Software Foundation, Inc. + +;; Maintainer: Morten Welinder +;; 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 ?_)) + ;; If the name is longer than 8 chars, and doesn't have a + ;; period, and we have a dash or underscore that isn't too + ;; close to the beginning, change that to a period. This + ;; is so we could salvage more characters of the original + ;; name by pushing them into the extension. + (if (and (not (string-match "\\." string)) + (> (length string) 8) + ;; We don't gain anything if we put the period closer + ;; than 5 chars from the beginning (5 + 3 = 8). + (setq i (string-match "[-_]" string 5))) + (aset string i ?\.)) + ;; 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 in the first 8 chars, insert one. + ;; This enables to have 3 more characters from the original + ;; name in the extension. + (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. + ;; (DOS doesn't allow more than one period.) + (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 `~' or `#', + ;; make sure the munged name ends with it also. This is so that + ;; backup and auto-save files retain their telltale form. + (if (memq 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)))))) + +(defun dos-8+3-filename (filename) + "Truncate FILENAME to DOS 8+3 limits." + (if (or (not (stringp filename)) + (< (length filename) 5)) ; too short to give any trouble + filename + (let ((flen (length filename))) + ;; If FILENAME has a trailing slash, remove it and recurse. + (if (memq (aref filename (1- flen)) '(?/ ?\\)) + (concat (dos-8+3-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))) + (strlen (length string)) + (lastchar (aref string (1- strlen))) + i firstdot) + (setq firstdot (string-match "\\." string)) + (cond + (firstdot + ;; Truncate the extension to 3 characters. + (if (> strlen (+ firstdot 4)) + (setq string (substring string 0 (+ firstdot 4)))) + ;; Truncate the basename to 8 characters. + (if (> firstdot 8) + (setq string (concat (substring string 0 8) + "." + (substring string (1+ firstdot)))))) + ((> strlen 8) + ;; No dot; truncate file name to 8 characters. + (setq string (substring string 0 8)))) + ;; 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 (dos-8+3-filename (substring dir 0 dlen-m-1)) + "/") + ;; Recurse to truncate the leading directories. + (dos-8+3-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