;;; dos-w32.el --- Functions shared among MS-DOS and W32 (NT/95) platforms ;; Copyright (C) 1996 Free Software Foundation, Inc. ;; Maintainer: Geoff Voelker ;; 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: ;; Use ";" instead of ":" as a path separator (from files.el). (setq path-separator ";") (setq minibuffer-history-case-insensitive-variables (cons 'file-name-history minibuffer-history-case-insensitive-variables)) ;; Set the null device (for compile.el). (setq 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\\|sym\\|sys\\|chk\\|out\\|bin\\|ico\\|pif\\|class\\)$" . t) ; MS-Dos stuff ("\\.\\(dll\\|drv\\|cpl\\|scr\\vbx\\|386\\|vxd\\|fon\\|fnt\\|fot\\|ttf\\|grp\\)$" . t) ; Windows stuff ("\\.\\(hlp\\|bmp\\|wav\\|avi\\|mpg\\|jpg\\|tif\\|mov\\|au\\)" . t) ; known binary data files ("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . t) ; Packers ("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\|jar\\)$" . t) ; Unix stuff ("\\.tp[ulpw]$" . t) ; Borland Pascal stuff ("[:/]tags$" . nil) ; 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.") ;; Return the pair matching filename on file-name-buffer-file-type-alist, ;; or nil otherwise. (defun find-buffer-file-type-match (filename) (let ((alist file-name-buffer-file-type-alist) (found 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 found (car alist))) (setq alist (cdr alist))) found))) ;; Don't check for untranslated file systems here. (defun find-buffer-file-type (filename) (let ((match (find-buffer-file-type-match filename)) (code)) (if (not match) default-buffer-file-type (setq code (cdr match)) (cond ((memq code '(nil t)) code) ((and (symbolp code) (fboundp code)) (funcall code filename)))))) (setq-default buffer-file-coding-system 'undecided-dos) (defun find-buffer-file-type-coding-system (command) "Choose a coding system for a file operation. If COMMAND is `insert-file-contents', the coding system is chosen based upon the filename, the contents of `untranslated-filesystem-list' and `file-name-buffer-file-type-alist', and whether the file exists: If it matches in `untranslated-filesystem-list': If the file exists: `no-conversion' If the file does not exist: `undecided' If it matches in `file-name-buffer-file-type-alist': If the match is t (for binary): `no-conversion' If the match is nil (for dos-text): `undecided-dos' Otherwise: If the file exists: `undecided' If the file does not exist: default-buffer-file-coding-system If COMMAND is `write-region', the coding system is chosen based upon the value of `buffer-file-coding-system' and `buffer-file-type'. If `buffer-file-coding-system' is non-nil, its value is used. If it is nil and `buffer-file-type' is t, the coding system is `no-conversion'. Otherwise, it is `undecided-dos'. The two most common situations are when DOS and Unix files are read and written, and their names do not match in `untranslated-filesystem-list' and `file-name-buffer-file-type-alist'. In these cases, the coding system initially will be `undecided'. As the file is read in the DOS case, the coding system will be changed to `undecided-dos' as CR/LFs are detected. As the file is read in the Unix case, the coding system will be changed to `undecided-unix' as LFs are detected. In both cases, `buffer-file-coding-system' will be set to the appropriate coding system, and the value of `buffer-file-coding-system' will be used when writing the file." (let ((op (nth 0 command)) (target) (binary nil) (text nil) (undecided nil) (undecided-unix nil)) (cond ((eq op 'insert-file-contents) (setq target (nth 1 command)) ;; First check for a file name that indicates ;; it is truly binary. (setq binary (find-buffer-file-type target)) (cond (binary) ;; Next check for files that MUST use DOS eol conversion. ((find-buffer-file-type-match target) (setq text t)) ;; For any other existing file, decide based on contents. ((file-exists-p target) (setq undecided t)) ;; Next check for a non-DOS file system. ((untranslated-file-p target) (setq undecided-unix t))) (cond (binary '(no-conversion . no-conversion)) (text '(undecided-dos . undecided-dos)) (undecided-unix '(undecided-unix . undecided-unix)) (undecided '(undecided . undecided)) (t (cons default-buffer-file-coding-system default-buffer-file-coding-system)))) ((eq op 'write-region) (if buffer-file-coding-system (cons buffer-file-coding-system buffer-file-coding-system) ;; Normally this is used only in a non-file-visiting ;; buffer, because normally buffer-file-coding-system is non-nil ;; in a file-visiting buffer. (if buffer-file-type '(no-conversion . no-conversion) '(undecided-dos . undecided-dos))))))) (modify-coding-system-alist 'file "" 'find-buffer-file-type-coding-system) (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-coding-system () (save-excursion (set-buffer (current-buffer)) (let* ((dummy-insert-op (list 'insert-file-contents (buffer-file-name))) (coding-system-pair (find-buffer-file-type-coding-system dummy-insert-op))) (setq buffer-file-coding-system (car coding-system-pair)) (setq buffer-file-type (eq buffer-file-coding-system 'no-conversion))))) ;;; To set the default coding system on new files. (add-hook 'find-file-not-found-hooks 'find-file-not-found-set-buffer-file-coding-system) ;;; 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/W32 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:\"." (interactive "fUntranslated file system: ") (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:\"." (interactive "fUntranslated file system: ") (setq untranslated-filesystem-list (delete (untranslated-canonical-name filesystem) untranslated-filesystem-list))) ;;; 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) ;;; Support for printing under DOS/Windows, see lpr.el and ps-print.el. ;; Function to actually send data to the printer port. ;; Supports writing directly, and using various programs. (defun direct-print-region-helper (printer start end lpr-prog delete-text buf display rest) (let* ((directory-sep-char ?\\) ; expand file names in DOS format ;; Ignore case when matching known external program names. (case-fold-search t) ;; Convert / to \ in printer name, for sake of external programs. (printer (if (stringp printer) (subst-char-in-string ?/ ?\\ printer) printer)) ;; Find a directory that is local, to work-around Windows bug. (safe-dir (let ((safe-dirs (list "c:/" (getenv "windir") (getenv "TMPDIR")))) (while (not (file-attributes (car safe-dirs))) (setq safe-dirs (cdr safe-dirs))) (car safe-dirs))) (tempfile (make-temp-name (expand-file-name "EP" (getenv "TMPDIR")))) ;; capture output for diagnosis (errbuf (list (get-buffer-create " *print-region-helper*") t))) ;; It seems that we must be careful about the directory name that ;; gets added to the printer port name by write-region when using ;; the standard "PRN" or "LPTx" ports, because the write can fail if ;; the directory is on a network drive. The same is true when ;; asking command.com to copy the file. ;; No action is needed for UNC printer names, which is just as well ;; because `expand-file-name' doesn't support UNC names on MS-DOS. (if (and (stringp printer) (not (string-match "^\\\\" printer))) (setq printer (expand-file-name printer safe-dir))) ;; Handle known programs specially where necessary. (unwind-protect (cond ;; nprint.exe is the standard print command on Netware ((string-match "^nprint\\(\\.exe\\)?$" (file-name-nondirectory lpr-prog)) (write-region start end tempfile nil 0) (call-process lpr-prog nil errbuf nil tempfile (concat "P=" printer))) ;; print.exe is a standard command on NT ((string-match "^print\\(\\.exe\\)?$" (file-name-nondirectory lpr-prog)) ;; Be careful not to invoke print.exe on MS-DOS or Windows 9x ;; though, because it is a TSR program there (hangs Emacs). (or (and (eq system-type 'windows-nt) (null (getenv "winbootdir"))) (error "Printing via print.exe is not supported on MS-DOS or Windows 9x")) ;; It seems that print.exe always appends a form-feed so we ;; should make sure to omit the last FF in the data. (if (and (> end start) (char-equal (char-before end) ?\C-l)) (setq end (1- end))) ;; cancel out annotate function for non-PS case (let ((write-region-annotate-functions nil)) (write-region start end tempfile nil 0)) (call-process lpr-prog nil errbuf nil (concat "/D:" printer) tempfile)) ;; support lpr and similar programs for convenience, but ;; supply an explicit filename because the NT version of lpr ;; can't read from stdin. ((> (length lpr-prog) 0) (write-region start end tempfile nil 0) (setq rest (append rest (list tempfile))) (apply 'call-process lpr-prog nil errbuf nil rest)) ;; Run command.com to access printer port on Windows 9x, unless ;; we are supposed to append to an existing (non-empty) file, ;; to work around a bug in Windows 9x that prevents Win32 ;; programs from accessing LPT ports reliably. ((and (eq system-type 'windows-nt) (getenv "winbootdir") ;; file-attributes fails on LPT ports on Windows 9x but ;; not on NT, so handle both cases for safety. (eq (or (nth 7 (file-attributes printer)) 0) 0)) (write-region start end tempfile nil 0) (let ((w32-quote-process-args nil)) (call-process "command.com" nil errbuf nil "/c" (format "copy /b %s %s" tempfile printer)))) ;; write directly to the printer port (t (write-region start end printer t 0))) ;; ensure we remove the tempfile if created (if (file-exists-p tempfile) (delete-file tempfile))))) (defvar printer-name) (defun direct-print-region-function (start end &optional lpr-prog delete-text buf display &rest rest) "DOS/Windows-specific function to print the region on a printer. Writes the region to the device or file which is a value of `printer-name' \(which see\), unless the value of `lpr-command' indicates a specific program should be invoked." ;; DOS printers need the lines to end with CR-LF pairs, so make ;; sure it always happens that way, unless the buffer is binary. (let* ((coding coding-system-for-write) (coding-base (if (null coding) 'undecided (coding-system-base coding))) (eol-type (coding-system-eol-type coding-base)) ;; Make each print-out eject the final page, but don't waste ;; paper if the file ends with a form-feed already. (write-region-annotate-functions (cons (lambda (start end) (if (not (char-equal (char-before end) ?\C-l)) `((,end . "\f")))) write-region-annotate-functions)) (printer (or (and (boundp 'dos-printer) (stringp (symbol-value 'dos-printer)) (symbol-value 'dos-printer)) printer-name))) (or (eq coding-system-for-write 'no-conversion) (setq coding-system-for-write (aref eol-type 1))) ; force conversion to DOS EOLs (direct-print-region-helper printer start end lpr-prog delete-text buf display rest))) (setq print-region-function 'direct-print-region-function) ;; Set this to nil if you have a port of the `pr' program ;; (e.g., from GNU Textutils), or if you have an `lpr' ;; program (see above) that can print page headers. ;; If `lpr-headers-switches' is non-nil (the default) and ;; `print-region-function' is set to `dos-print-region-function', ;; then requests to print page headers will be silently ;; ignored, and `print-buffer' and `print-region' produce ;; the same output as `lpr-buffer' and `lpr-region', accordingly. (setq lpr-headers-switches "(page headers are not supported)") (defvar ps-printer-name) (defun direct-ps-print-region-function (start end &optional lpr-prog delete-text buf display &rest rest) "DOS/Windows-specific function to print the region on a PostScript printer. Writes the region to the device or file which is a value of `ps-printer-name' \(which see\), unless the value of `ps-lpr-command' indicates a specific program should be invoked." (let ((printer (or (and (boundp 'dos-ps-printer) (stringp (symbol-value 'dos-ps-printer)) (symbol-value 'dos-ps-printer)) ps-printer-name))) (direct-print-region-helper printer start end lpr-prog delete-text buf display rest))) (setq ps-print-region-function 'direct-ps-print-region-function) ;(setq ps-lpr-command "gs") ;(setq ps-lpr-switches '("-q" "-dNOPAUSE" "-sDEVICE=epson" "-r240x60" ; "-sOutputFile=LPT1")) (provide 'dos-w32) ;;; dos-w32.el ends here