wcsstr.c revision 92986
176612Stshiozak/*- 276612Stshiozak * Copyright (c)1999 Citrus Project, 376612Stshiozak * All rights reserved. 476612Stshiozak * 576612Stshiozak * Redistribution and use in source and binary forms, with or without 676612Stshiozak * modification, are permitted provided that the following conditions 776612Stshiozak * are met: 876612Stshiozak * 1. Redistributions of source code must retain the above copyright 976612Stshiozak * notice, this list of conditions and the following disclaimer. 1076612Stshiozak * 2. Redistributions in binary form must reproduce the above copyright 1176612Stshiozak * notice, this list of conditions and the following disclaimer in the 1276612Stshiozak * documentation and/or other materials provided with the distribution. 1376612Stshiozak * 1476612Stshiozak * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1576612Stshiozak * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1676612Stshiozak * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1776612Stshiozak * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1876612Stshiozak * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1976612Stshiozak * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2076612Stshiozak * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2176612Stshiozak * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2276612Stshiozak * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2376612Stshiozak * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2476612Stshiozak * SUCH DAMAGE. 2576612Stshiozak * 2676612Stshiozak * citrus Id: wcsstr.c,v 1.2 2000/12/21 05:07:25 itojun Exp 2776612Stshiozak */ 2876612Stshiozak 2976612Stshiozak#include <sys/cdefs.h> 3092986Sobrien#if 0 3176612Stshiozak#if defined(LIBC_SCCS) && !defined(lint) 3276612Stshiozak__RCSID("$NetBSD: wcsstr.c,v 1.1 2000/12/23 23:14:37 itojun Exp $"); 3376612Stshiozak#endif /* LIBC_SCCS and not lint */ 3492986Sobrien#endif 3586170Sobrien__FBSDID("$FreeBSD: head/lib/libc/string/wcsstr.c 92986 2002-03-22 21:53:29Z obrien $"); 3676612Stshiozak 3776612Stshiozak#include <assert.h> 3876612Stshiozak#include <wchar.h> 3976612Stshiozak 4076612Stshiozakwchar_t * 4176612Stshiozakwcsstr(big, little) 4276612Stshiozak const wchar_t *big; 4376612Stshiozak const wchar_t *little; 4476612Stshiozak{ 4576612Stshiozak const wchar_t *p; 4676612Stshiozak const wchar_t *q; 4776612Stshiozak const wchar_t *r; 4876612Stshiozak 4976612Stshiozak if (!*little) { 5076612Stshiozak /* LINTED interface specification */ 5176612Stshiozak return (wchar_t *)big; 5276612Stshiozak } 5376612Stshiozak if (wcslen(big) < wcslen(little)) 5476612Stshiozak return NULL; 5576612Stshiozak 5676612Stshiozak p = big; 5776612Stshiozak q = little; 5876612Stshiozak while (*p) { 5976612Stshiozak q = little; 6076612Stshiozak r = p; 6176612Stshiozak while (*q) { 6276612Stshiozak if (*r != *q) 6376612Stshiozak break; 6476612Stshiozak q++; 6576612Stshiozak r++; 6676612Stshiozak } 6776612Stshiozak if (!*q) { 6876612Stshiozak /* LINTED interface specification */ 6976612Stshiozak return (wchar_t *)p; 7076612Stshiozak } 7176612Stshiozak p++; 7276612Stshiozak } 7376612Stshiozak return NULL; 7476612Stshiozak} 75