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100 lines
3.7 KiB
EmacsLisp
100 lines
3.7 KiB
EmacsLisp
;; Override parts of files.el for VMS.
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;; Copyright (C) 1986 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 1, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Functions that need redefinition
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;;; VMS file names are upper case, but buffer names are more
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;;; convenient in lower case.
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(defun create-file-buffer (filename)
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"Create a suitably named buffer for visiting FILENAME, and return it.
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FILENAME (sans directory) is used unchanged if that name is free;
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otherwise a string <2> or <3> or ... is appended to get an unused name."
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(generate-new-buffer (downcase (file-name-nondirectory filename))))
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;;; Given a string FN, return a similar name which is a legal VMS filename.
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;;; This is used to avoid invalid auto save file names.
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(defun make-legal-file-name (fn)
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(setq fn (copy-sequence fn))
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(let ((dot nil) (indx 0) (len (length fn)) chr)
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(while (< indx len)
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(setq chr (aref fn indx))
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(cond
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((eq chr ?.) (if dot (aset fn indx ?_) (setq dot t)))
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((not (or (and (>= chr ?a) (<= chr ?z)) (and (>= chr ?A) (<= chr ?Z))
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(and (>= chr ?0) (<= chr ?9))
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(eq chr ?$) (eq chr ?_) (and (eq chr ?-) (> indx 0))))
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(aset fn indx ?_)))
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(setq indx (1+ indx))))
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fn)
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;;; Auto save filesnames start with _$ and end with $.
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(defun make-auto-save-file-name ()
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"Return file name to use for auto-saves of current buffer.
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Does not consider auto-save-visited-file-name; that is checked
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before calling this function.
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This is a separate function so your .emacs file or site-init.el can redefine it.
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See also auto-save-file-name-p."
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(if buffer-file-name
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(concat (file-name-directory buffer-file-name)
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"_$"
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(file-name-nondirectory buffer-file-name)
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"$")
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(expand-file-name (concat "_$_" (make-legal-file-name (buffer-name)) "$"))))
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(defun auto-save-file-name-p (filename)
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"Return t if FILENAME can be yielded by make-auto-save-file-name.
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FILENAME should lack slashes.
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This is a separate function so your .emacs file or site-init.el can redefine it."
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(string-match "^_\\$.*\\$" filename))
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(defun vms-suspend-resume-hook ()
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"When resuming suspended Emacs, check for file to be found.
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If the logical name `EMACS_FILE_NAME' is defined, `find-file' that file."
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(let ((file (vms-system-info "LOGICAL" "EMACS_FILE_NAME")))
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(if file (find-file file))))
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(setq suspend-resume-hook 'vms-suspend-resume-hook)
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(defun vms-suspend-hook ()
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"Don't allow suspending if logical name `DONT_SUSPEND_EMACS' is defined."
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(if (vms-system-info "LOGICAL" "DONT_SUSPEND_EMACS")
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(error "Can't suspend this emacs"))
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nil)
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(setq suspend-hook 'vms-suspend-hook)
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(defun vms-read-directory (dirname switches buffer)
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(save-excursion
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(set-buffer buffer)
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(subprocess-command-to-buffer
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(concat "DIRECTORY " switches " " dirname)
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buffer)
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(goto-char (point-min))
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;; Remove all the trailing blanks.
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(while (search-forward " \n")
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(forward-char -1)
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(delete-horizontal-space))
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(goto-char (point-min))))
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(setq dired-listing-switches
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"/SIZE/DATE/OWNER/WIDTH=(FILENAME=32,SIZE=5)")
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