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+;;; netrc.el --- .netrc parsing functionality
+;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002
+;;        Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
+;; Keywords: news
+;;  Modularized by Ted Zlatanov <tzz@lifelogs.com>
+;;  when it was part of Gnus.
+
+;; 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:
+
+;; Just the .netrc parsing functionality, abstracted so other packages
+;; besides Gnus can use it.
+
+;;; Code:
+
+;;;
+;;; .netrc and .authinforc parsing
+;;;
+
+(defalias 'netrc-point-at-eol
+  (if (fboundp 'point-at-eol)
+      'point-at-eol
+    'line-end-position))
+
+(defun netrc-parse (file)
+  "Parse FILE and return an list of all entries in the file."
+  (when (file-exists-p file)
+    (with-temp-buffer
+      (let ((tokens '("machine" "default" "login"
+                      "password" "account" "macdef" "force"
+                      "port"))
+            alist elem result pair)
+        (insert-file-contents file)
+        (goto-char (point-min))
+        ;; Go through the file, line by line.
+        (while (not (eobp))
+          (narrow-to-region (point) (netrc-point-at-eol))
+          ;; For each line, get the tokens and values.
+          (while (not (eobp))
+            (skip-chars-forward "\t ")
+            ;; Skip lines that begin with a "#".
+            (if (eq (char-after) ?#)
+                (goto-char (point-max))
+              (unless (eobp)
+                (setq elem
+                      (if (= (following-char) ?\")
+                          (read (current-buffer))
+                        (buffer-substring
+                         (point) (progn (skip-chars-forward "^\t ")
+                                        (point)))))
+                (cond
+                 ((equal elem "macdef")
+                  ;; We skip past the macro definition.
+                  (widen)
+                  (while (and (zerop (forward-line 1))
+                              (looking-at "$")))
+                  (narrow-to-region (point) (point)))
+                 ((member elem tokens)
+                  ;; Tokens that don't have a following value are ignored,
+                  ;; except "default".
+                  (when (and pair (or (cdr pair)
+                                      (equal (car pair) "default")))
+                    (push pair alist))
+                  (setq pair (list elem)))
+                 (t
+                  ;; Values that haven't got a preceding token are ignored.
+                  (when pair
+                    (setcdr pair elem)
+                    (push pair alist)
+                    (setq pair nil)))))))
+          (when alist
+            (push (nreverse alist) result))
+          (setq alist nil
+                pair nil)
+          (widen)
+          (forward-line 1))
+        (nreverse result)))))
+
+(defun netrc-machine (list machine &optional port defaultport)
+  "Return the netrc values from LIST for MACHINE or for the default entry.
+If PORT specified, only return entries with matching port tokens.
+Entries without port tokens default to DEFAULTPORT."
+  (let ((rest list)
+        result)
+    (while list
+      (when (equal (cdr (assoc "machine" (car list))) machine)
+        (push (car list) result))
+      (pop list))
+    (unless result
+      ;; No machine name matches, so we look for default entries.
+      (while rest
+        (when (assoc "default" (car rest))
+          (push (car rest) result))
+        (pop rest)))
+    (when result
+      (setq result (nreverse result))
+      (while (and result
+                  (not (equal (or port defaultport "nntp")
+                              (or (netrc-get (car result) "port")
+                                  defaultport "nntp"))))
+        (pop result))
+      (car result))))
+
+(defun netrc-get (alist type)
+  "Return the value of token TYPE from ALIST."
+  (cdr (assoc type alist)))
+
+(provide 'netrc)
+
+;;; netrc.el ends here