--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/tl/range.el	Mon Aug 13 08:46:56 2007 +0200
@@ -0,0 +1,109 @@
+;;; range.el --- range functions
+
+;; Copyright (C) 1987 .. 1996 Free Software Foundation, Inc.
+
+;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
+;;         Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;;         MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Version:
+;;	$Id: range.el,v 1.1.1.1 1996/12/18 03:55:31 steve Exp $
+;; Keywords: range
+
+;; This file is part of tl (Tiny Library).
+
+;; This program 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.
+
+;; This program 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 This program; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+;; These functions were imported from September Gnus 0.40.
+
+(defun compress-sorted-numbers (numbers &optional always-list)
+  "Convert list of numbers to a list of ranges or a single range.
+If ALWAYS-LIST is non-nil, this function will always release a list of
+ranges. [range.el]"
+  (let* ((first (car numbers))
+	 (last (car numbers))
+	 result)
+    (if (null numbers)
+	nil
+      (if (not (listp (cdr numbers)))
+	  numbers
+	(while numbers
+	  (cond ((= last (car numbers)) nil) ;Omit duplicated number
+		((= (1+ last) (car numbers)) ;Still in sequence
+		 (setq last (car numbers)))
+		(t			;End of one sequence
+		 (setq result
+		       (cons (if (= first last) first
+			       (cons first last)) result))
+		 (setq first (car numbers))
+		 (setq last  (car numbers))))
+	  (setq numbers (cdr numbers)))
+	(if (and (not always-list) (null result))
+	    (if (= first last) (list first) (cons first last))
+	  (nreverse (cons (if (= first last) first (cons first last))
+			  result)))))))
+
+(defun expand-range (range)
+  "Expand a range into a list of numbers. [range.el]"
+  (cond ((numberp range)
+	 range)
+	((numberp (cdr range))
+	 (index (car range)(cdr range))
+	 )
+	(t
+	 (let (dest ret)
+	   (mapcar (function
+		    (lambda (sec)
+		      (setq ret (expand-range sec))
+		      (setq dest
+			    (nconc dest
+				   (if (and (listp ret)
+					    (listp (cdr ret)))
+				       ret
+				     (list ret)
+				     )))
+		      ))
+		   range)
+	   dest))))
+
+(defun member-of-range (number range)
+  "Return t if NUMBER is a member of RANGE. [range.el]"
+  (cond ((numberp range)
+	 (= number range)
+	 )
+	((numberp (cdr range))
+	 (and (<= (car range) number)
+	      (<= number (cdr range))
+	      )
+	 )
+	(t
+	 (catch 'tag
+	   (while range
+	     (if (member-of-range number (car range))
+		 (throw 'tag t)
+	       )
+	     (setq range (cdr range))
+	     ))
+	 )))
+
+
+;;; @ end
+;;;
+
+(provide 'range)
+
+;;; range.el ends here