1 /*- 2 * Copyright (c)1999 Citrus Project, 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * citrus Id: wcsstr.c,v 1.2 2000/12/21 05:07:25 itojun Exp 27 */ 28 29 #include <sys/cdefs.h> 30 #if defined(LIBC_SCCS) && !defined(lint) 31 __RCSID("$NetBSD: wcsstr.c,v 1.1 2000/12/23 23:14:37 itojun Exp $"); 32 #endif /* LIBC_SCCS and not lint */ 33 __FBSDID("$FreeBSD$"); 34 35 #include <assert.h> 36 #include <wchar.h> 37 38 wchar_t * 39 wcsstr(big, little) 40 const wchar_t *big; 41 const wchar_t *little; 42 { 43 const wchar_t *p; 44 const wchar_t *q; 45 const wchar_t *r; 46 47 if (!*little) { 48 /* LINTED interface specification */ 49 return (wchar_t *)big; 50 } 51 if (wcslen(big) < wcslen(little)) 52 return NULL; 53 54 p = big; 55 q = little; 56 while (*p) { 57 q = little; 58 r = p; 59 while (*q) { 60 if (*r != *q) 61 break; 62 q++; 63 r++; 64 } 65 if (!*q) { 66 /* LINTED interface specification */ 67 return (wchar_t *)p; 68 } 69 p++; 70 } 71 return NULL; 72 } 73