wcsstr.c revision 77117
11541Srgrimes/*- 21541Srgrimes * Copyright (c)1999 Citrus Project, 31541Srgrimes * All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 141541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 151541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 161541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 171541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 181541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 191541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 201541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 211541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 221541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 231541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 241541Srgrimes * SUCH DAMAGE. 251541Srgrimes * 261541Srgrimes * citrus Id: wcsstr.c,v 1.2 2000/12/21 05:07:25 itojun Exp 271541Srgrimes */ 281541Srgrimes 291541Srgrimes#include <sys/cdefs.h> 301541Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 311541Srgrimes__RCSID("$NetBSD: wcsstr.c,v 1.1 2000/12/23 23:14:37 itojun Exp $"); 321541Srgrimes#endif /* LIBC_SCCS and not lint */ 331541Srgrimes#ifndef lint 3450477Speterstatic const char rcsid[] = 351541Srgrimes "$FreeBSD: head/lib/libc/string/wcsstr.c 77117 2001-05-24 08:47:42Z obrien $"; 361541Srgrimes#endif 3713203Swollman 381541Srgrimes#include <assert.h> 391541Srgrimes#include <wchar.h> 402112Swollman 4112221Sbdewchar_t * 4241059Speterwcsstr(big, little) 431541Srgrimes const wchar_t *big; 4424131Sbde const wchar_t *little; 4531561Sbde{ 461541Srgrimes const wchar_t *p; 471541Srgrimes const wchar_t *q; 481541Srgrimes const wchar_t *r; 491541Srgrimes 501541Srgrimes if (!*little) { 511541Srgrimes /* LINTED interface specification */ 5254655Seivind return (wchar_t *)big; 5347955Sdt } 5447955Sdt if (wcslen(big) < wcslen(little)) 5530354Sphk return NULL; 5630309Sphk 5713203Swollman p = big; 5812819Sphk q = little; 5962378Sgreen while (*p) { 6012819Sphk q = little; 6112819Sphk r = p; 6212819Sphk while (*q) { 6312577Sbde if (*r != *q) 6412819Sphk break; 6512819Sphk q++; 661541Srgrimes r++; 671541Srgrimes } 681541Srgrimes if (!*q) { 691541Srgrimes /* LINTED interface specification */ 701541Srgrimes return (wchar_t *)p; 711541Srgrimes } 728876Srgrimes p++; 7317429Sphk } 741541Srgrimes return NULL; 751541Srgrimes} 761541Srgrimes