From owner-svn-src-stable@freebsd.org Mon Mar 19 07:07:03 2018 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C8EA4F5604E; Mon, 19 Mar 2018 07:07:03 +0000 (UTC) (envelope-from eadler@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 741667F231; Mon, 19 Mar 2018 07:07:03 +0000 (UTC) (envelope-from eadler@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 6A8713894; Mon, 19 Mar 2018 07:07:03 +0000 (UTC) (envelope-from eadler@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w2J773Ac006886; Mon, 19 Mar 2018 07:07:03 GMT (envelope-from eadler@FreeBSD.org) Received: (from eadler@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w2J773sg006885; Mon, 19 Mar 2018 07:07:03 GMT (envelope-from eadler@FreeBSD.org) Message-Id: <201803190707.w2J773sg006885@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: eadler set sender to eadler@FreeBSD.org using -f From: Eitan Adler Date: Mon, 19 Mar 2018 07:07:03 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r331192 - stable/11/lib/libc/stdlib X-SVN-Group: stable-11 X-SVN-Commit-Author: eadler X-SVN-Commit-Paths: stable/11/lib/libc/stdlib X-SVN-Commit-Revision: 331192 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Mar 2018 07:07:04 -0000 Author: eadler Date: Mon Mar 19 07:07:03 2018 New Revision: 331192 URL: https://svnweb.freebsd.org/changeset/base/331192 Log: MFC r320992,r320993: Add a complete example to tsearch(3) Modified: stable/11/lib/libc/stdlib/tsearch.3 Directory Properties: stable/11/ (props changed) Modified: stable/11/lib/libc/stdlib/tsearch.3 ============================================================================== --- stable/11/lib/libc/stdlib/tsearch.3 Mon Mar 19 07:03:02 2018 (r331191) +++ stable/11/lib/libc/stdlib/tsearch.3 Mon Mar 19 07:07:03 2018 (r331192) @@ -27,7 +27,7 @@ .\" OpenBSD: tsearch.3,v 1.2 1998/06/21 22:13:49 millert Exp .\" $FreeBSD$ .\" -.Dd October 9, 2016 +.Dd June 4, 2017 .Dt TSEARCH 3 .Os .Sh NAME @@ -130,6 +130,64 @@ is NULL or the datum cannot be found. The .Fn twalk function returns no value. +.Sh EXAMPLES +This example uses +.Fn tsearch +to search for four strings in +.Dv root . +Because the strings are not already present, they are added. +.Fn tsearch +is called twice on the fourth string to demonstrate that a string is not added when it is already present. +.Fn tfind +is used to find the single instance of the fourth string, and +.Fn tdelete +removes it. +Finally, +.Fn twalk +is used to return and display the resulting binary search tree. +.Bd -literal +#include +#include +#include + +int +comp(const void *a, const void *b) +{ + + return strcmp(a, b); +} + +void +printwalk(const posix_tnode * node, VISIT v, int __unused0) +{ + + if (v == postorder || v == leaf) { + printf("node: %s\en", *(char **)node); + } +} + +int +main(void) +{ + posix_tnode *root = NULL; + + char one[] = "blah1"; + char two[] = "blah-2"; + char three[] = "blah-3"; + char four[] = "blah-4"; + + tsearch(one, &root, comp); + tsearch(two, &root, comp); + tsearch(three, &root, comp); + tsearch(four, &root, comp); + tsearch(four, &root, comp); + printf("four: %s\en", *(char **)tfind(four, &root, comp)); + tdelete(four, &root, comp); + + twalk(root, printwalk); + return 0; +} +.Ed .Sh SEE ALSO .Xr bsearch 3 , .Xr hsearch 3 ,