--- /dev/null
+;;; dos-nt.el --- Functions shared among MS-DOS and Win32 (NT/95) platforms
+
+;; Copyright (C) 1996 Free Software Foundation, Inc.
+
+;; Maintainer: Geoff Voelker (voelker@cs.washington.edu)
+;; 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:
+
+;; Parts of this code are duplicated functions taken from dos-fns.el
+;; and winnt.el.
+
+;;; Code:
+
+;;; Add %t: into the mode line format just after the open-paren.
+(let ((tail (member " %[(" mode-line-format)))
+ (setcdr tail (cons (purecopy "%t:")
+ (cdr tail))))
+
+;; Use ";" instead of ":" as a path separator (from files.el).
+(setq path-separator ";")
+
+;; Set the null device (for compile.el).
+(setq grep-null-device "NUL")
+
+;; Set the grep regexp to match entries with drive letters.
+(setq grep-regexp-alist
+ '(("^\\(\\([a-zA-Z]:\\)?[^:( \t\n]+\\)[:( \t]+\\([0-9]+\\)[:) \t]" 1 3)))
+
+;; For distinguishing file types based upon suffixes.
+(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)
+ ;; First check if file is on an untranslated filesystem, then on the alist.
+ (if (untranslated-file-p filename)
+ t ; for binary
+ (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)
+
+
+;;; To accomodate filesystems that do not require CR/LF translation.
+(defvar untranslated-filesystem-list nil
+ "List of filesystems that require no CR/LF translation when reading
+and writing files. Each filesystem in the list is a string naming
+the directory prefix corresponding to the filesystem.")
+
+(defun untranslated-canonical-name (filename)
+ "Return FILENAME in a canonicalized form for use with the functions
+dealing with untranslated filesystems."
+ (if (memq system-type '(ms-dos windows-nt))
+ ;; The canonical form for DOS/NT/Win95 is with A-Z downcased and all
+ ;; directory separators changed to directory-sep-char.
+ (let ((name nil))
+ (setq name (mapconcat
+ '(lambda (char)
+ (if (and (<= ?A char) (<= char ?Z))
+ (char-to-string (+ (- char ?A) ?a))
+ (char-to-string char)))
+ filename nil))
+ ;; Use expand-file-name to canonicalize directory separators, except
+ ;; with bare drive letters (which would have the cwd appended).
+ (if (string-match "^.:$" name)
+ name
+ (expand-file-name name)))
+ filename))
+
+(defun untranslated-file-p (filename)
+ "Return t if FILENAME is on a filesystem that does not require
+CR/LF translation, and nil otherwise."
+ (let ((fs (untranslated-canonical-name filename))
+ (ufs-list untranslated-filesystem-list)
+ (found nil))
+ (while (and (not found) ufs-list)
+ (if (string-match (concat "^" (car ufs-list)) fs)
+ (setq found t)
+ (setq ufs-list (cdr ufs-list))))
+ found))
+
+(defun add-untranslated-filesystem (filesystem)
+ "Add FILESYSTEM to the list of filesystems that do not require
+CR/LF translation. FILESYSTEM is a string containing the directory
+prefix corresponding to the filesystem. For example, for a Unix
+filesystem mounted on drive Z:, FILESYSTEM could be \"Z:\"."
+ (let ((fs (untranslated-canonical-name filesystem)))
+ (if (member fs untranslated-filesystem-list)
+ untranslated-filesystem-list
+ (setq untranslated-filesystem-list
+ (cons fs untranslated-filesystem-list)))))
+
+(defun remove-untranslated-filesystem (filesystem)
+ "Remove FILESYSTEM from the list of filesystems that do not require
+CR/LF translation. FILESYSTEM is a string containing the directory
+prefix corresponding to the filesystem. For example, for a Unix
+filesystem mounted on drive Z:, FILESYSTEM could be \"Z:\"."
+ (setq untranslated-filesystem-list
+ (delete (untranslated-canonical-name filesystem)
+ untranslated-filesystem-list)))
+
+(provide 'dos-nt)
+
+;;; dos-nt.el ends here
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