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+;;; url-ns.el --- Various netscape-ish functions for proxy definitions
+;; Author: $Author: fx $
+;; Created: $Date: 2000/12/20 21:08:02 $
+;; Version: $Revision: 1.2 $
+;; Keywords: comm, data, processes, hypermedia
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;; Copyright (c) 1997 - 1999 Free Software Foundation, Inc.
+;;;
+;;; 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.
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(require 'url-gw)
+
+;;;###autoload
+(defun isPlainHostName (host)
+  (not (string-match "\\." host)))
+
+;;;###autoload
+(defun dnsDomainIs (host dom)
+  (string-match (concat (regexp-quote dom) "$") host))
+
+;;;###autoload
+(defun dnsResolve (host)
+  (url-gateway-nslookup-host host))
+
+;;;###autoload
+(defun isResolvable (host)
+  (if (string-match "^[0-9.]+$" host)
+      t
+    (not (string= host (url-gateway-nslookup-host host)))))
+
+;;;###autoload
+(defun isInNet (ip net mask)
+  (let ((netc (split-string ip "\\."))
+	(ipc  (split-string net "\\."))
+	(maskc (split-string mask "\\.")))
+    (if (or (/= (length netc) (length ipc))
+	    (/= (length ipc) (length maskc)))
+	nil
+      (setq netc (mapcar 'string-to-int netc)
+	    ipc (mapcar 'string-to-int ipc)
+	    maskc (mapcar 'string-to-int maskc))
+      (and
+       (= (logand (nth 0 netc) (nth 0 maskc))
+	  (logand (nth 0 ipc)  (nth 0 maskc)))
+       (= (logand (nth 1 netc) (nth 1 maskc))
+	  (logand (nth 1 ipc)  (nth 1 maskc)))
+       (= (logand (nth 2 netc) (nth 2 maskc))
+	  (logand (nth 2 ipc)  (nth 2 maskc)))
+       (= (logand (nth 3 netc) (nth 3 maskc))
+	  (logand (nth 3 ipc)  (nth 3 maskc)))))))
+
+;; Netscape configuration file parsing
+(defvar url-ns-user-prefs nil
+  "Internal, do not use.")
+
+;;;###autoload
+(defun url-ns-prefs (&optional file)
+  (if (not file)
+      (setq file (expand-file-name "~/.netscape/preferences.js")))
+  (if (not (and (file-exists-p file)
+		(file-readable-p file)))
+      (message "Could not open %s for reading" file)
+    (save-excursion
+      (let ((false nil)
+	    (true t))
+	(setq url-ns-user-prefs (make-hash-table :size 13 :test 'equal))
+	(set-buffer (get-buffer-create " *ns-parse*"))
+	(erase-buffer)
+	(insert-file-contents file)
+	(goto-char (point-min))
+	(while (re-search-forward "^//" nil t)
+	  (replace-match ";;"))
+	(goto-char (point-min))
+	(while (re-search-forward "^user_pref(" nil t)
+	  (replace-match "(url-ns-set-user-pref "))
+	(goto-char (point-min))
+	(while (re-search-forward "\"," nil t)
+	  (replace-match "\""))
+	(goto-char (point-min))
+	(eval-buffer)))))
+
+(defun url-ns-set-user-pref (key val)
+  (puthash key val url-ns-user-prefs))
+
+;;;###autoload
+(defun url-ns-user-pref (key &optional default)
+  (gethash key url-ns-user-prefs default))
+
+(provide 'url-ns)