From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: intervals.c: About interval tree Date: Mon, 15 Apr 2013 10:02:15 -0400 Message-ID: References: <87k3o4cssy.fsf@gmail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1366034544 18663 80.91.229.3 (15 Apr 2013 14:02:24 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 15 Apr 2013 14:02:24 +0000 (UTC) Cc: emacs-devel@gnu.org To: Jambunathan K Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Apr 15 16:02:28 2013 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1URjzG-00022i-TN for ged-emacs-devel@m.gmane.org; Mon, 15 Apr 2013 16:02:27 +0200 Original-Received: from localhost ([::1]:38338 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1URjzG-0004UT-IZ for ged-emacs-devel@m.gmane.org; Mon, 15 Apr 2013 10:02:26 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:44678) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1URjz9-0004My-FJ for emacs-devel@gnu.org; Mon, 15 Apr 2013 10:02:24 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1URjz6-00029L-VZ for emacs-devel@gnu.org; Mon, 15 Apr 2013 10:02:19 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.182]:9321) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1URjz6-00029A-RB for emacs-devel@gnu.org; Mon, 15 Apr 2013 10:02:16 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av4EABK/CFFFxIEd/2dsb2JhbABEvw4Xc4IeAQEEAVYPFAULCzQSFBgNJIgeBsEtkQoDpHqBXoMT X-IPAS-Result: Av4EABK/CFFFxIEd/2dsb2JhbABEvw4Xc4IeAQEEAVYPFAULCzQSFBgNJIgeBsEtkQoDpHqBXoMT X-IronPort-AV: E=Sophos;i="4.84,565,1355115600"; d="scan'208";a="7435120" Original-Received: from 69-196-129-29.dsl.teksavvy.com (HELO pastel.home) ([69.196.129.29]) by ironport2-out.teksavvy.com with ESMTP/TLS/ADH-AES256-SHA; 15 Apr 2013 10:02:12 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id 88D8D67BA3; Mon, 15 Apr 2013 10:02:15 -0400 (EDT) In-Reply-To: <87k3o4cssy.fsf@gmail.com> (Jambunathan K.'s message of "Mon, 15 Apr 2013 10:08:05 +0530") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 206.248.154.182 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:158926 Archived-At: > It seems the tree that is used is "mostly balanced tree". I am > wondering what sort of "balancedness" we are talking about i.e.. what > invariant does the tree satisfy? If you look at balance_an_interval, I think it's just "balanced" in the sense that the left and right subtrees cover (as much as possible) the same text-size. So it's different from the usual literature, where "balanced" refers to the depth of the tree. Stefan "who replaced it with a splay-tree at some point"