wcsstr.c revision 86170
138494Sobrien/*- 2174294Sobrien * Copyright (c)1999 Citrus Project, 338494Sobrien * All rights reserved. 438494Sobrien * 538494Sobrien * Redistribution and use in source and binary forms, with or without 638494Sobrien * modification, are permitted provided that the following conditions 738494Sobrien * are met: 838494Sobrien * 1. Redistributions of source code must retain the above copyright 938494Sobrien * notice, this list of conditions and the following disclaimer. 1038494Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1138494Sobrien * notice, this list of conditions and the following disclaimer in the 1238494Sobrien * documentation and/or other materials provided with the distribution. 1338494Sobrien * 1438494Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1538494Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1638494Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1738494Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1838494Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1938494Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2042629Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2138494Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2238494Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2338494Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2438494Sobrien * SUCH DAMAGE. 2538494Sobrien * 2638494Sobrien * citrus Id: wcsstr.c,v 1.2 2000/12/21 05:07:25 itojun Exp 2738494Sobrien */ 2838494Sobrien 2938494Sobrien#include <sys/cdefs.h> 3038494Sobrien#if defined(LIBC_SCCS) && !defined(lint) 3138494Sobrien__RCSID("$NetBSD: wcsstr.c,v 1.1 2000/12/23 23:14:37 itojun Exp $"); 3238494Sobrien#endif /* LIBC_SCCS and not lint */ 3338494Sobrien__FBSDID("$FreeBSD: head/lib/libc/string/wcsstr.c 86170 2001-11-07 19:55:16Z obrien $"); 3438494Sobrien 3538494Sobrien#include <assert.h> 3638494Sobrien#include <wchar.h> 3738494Sobrien 3838494Sobrienwchar_t * 3938494Sobrienwcsstr(big, little) 40174294Sobrien const wchar_t *big; 4138494Sobrien const wchar_t *little; 4238494Sobrien{ 4338494Sobrien const wchar_t *p; 4438494Sobrien const wchar_t *q; 4538494Sobrien const wchar_t *r; 4638494Sobrien 4738494Sobrien if (!*little) { 4838494Sobrien /* LINTED interface specification */ 4938494Sobrien return (wchar_t *)big; 5038494Sobrien } 5138494Sobrien if (wcslen(big) < wcslen(little)) 5238494Sobrien return NULL; 5338494Sobrien 5438494Sobrien p = big; 5538494Sobrien q = little; 5638494Sobrien while (*p) { 57174294Sobrien q = little; 5838494Sobrien r = p; 59174294Sobrien while (*q) { 60174294Sobrien if (*r != *q) 61174294Sobrien break; 62174294Sobrien q++; 63174294Sobrien r++; 64174294Sobrien } 6538494Sobrien if (!*q) { 6638494Sobrien /* LINTED interface specification */ 67174294Sobrien return (wchar_t *)p; 68174294Sobrien } 69174294Sobrien p++; 70174294Sobrien } 71174294Sobrien return NULL; 72174294Sobrien} 73174294Sobrien