Author: brd (doc,ports committer) Date: Fri Jul 14 17:07:28 2017 New Revision: 320992 URL: https://svnweb.freebsd.org/changeset/base/320992
Log: Add a complete example to tsearch(3) Reviewed by: wblock, sevan, bruffer MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D11053 Modified: head/lib/libc/stdlib/tsearch.3 Modified: head/lib/libc/stdlib/tsearch.3 ============================================================================== --- head/lib/libc/stdlib/tsearch.3 Fri Jul 14 16:45:46 2017 (r320991) +++ head/lib/libc/stdlib/tsearch.3 Fri Jul 14 17:07:28 2017 (r320992) @@ -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 <stdio.h> +#include <search.h> +#include <string.h> + +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\n\\", *(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\n", *(char **)tfind(four, &root, comp)); + tdelete(four, &root, comp); + + twalk(root, printwalk); + return 0; +} +.Ed .Sh SEE ALSO .Xr bsearch 3 , .Xr hsearch 3 , _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
