diff -r 000000000000 -r 68f95e015346 usr/src/lib/libc/port/gen/lsearch.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/usr/src/lib/libc/port/gen/lsearch.c Tue Jun 14 00:00:00 2005 -0700 @@ -0,0 +1,70 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2004 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +/* Copyright (c) 1988 AT&T */ +/* All Rights Reserved */ + + +/* + * Linear search algorithm, generalized from Knuth (6.1) Algorithm Q. + * + * This version no longer has anything to do with Knuth's Algorithm Q, + * which first copies the new element into the table, then looks for it. + * The assumption there was that the cost of checking for the end of the + * table before each comparison outweighed the cost of the comparison, which + * isn't true when an arbitrary comparison function must be called and when the + * copy itself takes a significant number of cycles. + * Actually, it has now reverted to Algorithm S, which is "simpler." + */ + +#pragma weak lsearch = _lsearch + +#include "synonyms.h" +#include +#include +#include +#include +#include +#include + +void * +lsearch(const void *ky, void *bs, size_t *nelp, size_t width, + int (*compar)(const void *, const void *)) +{ + char *key = (char *)ky; + char *base = (char *)bs; + char *next = base + *nelp * width; /* End of table */ + void *res; + + for (; base < next; base += width) + if ((*compar)(key, base) == 0) + return (base); /* Key found */ + ++*nelp; /* Not found, add to table */ + res = memcpy(base, key, width); /* base now == next */ + return (res); +}