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wcsstr.c revision 1.1 
      1 /*	$NetBSD: wcsstr.c,v 1.1 2000/12/23 23:14:37 itojun Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)1999 Citrus Project,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  *
     28  *	citrus Id: wcsstr.c,v 1.2 2000/12/21 05:07:25 itojun Exp
     29  */
     30 
     31 #include <sys/cdefs.h>
     32 #if defined(LIBC_SCCS) && !defined(lint)
     33 __RCSID("$NetBSD: wcsstr.c,v 1.1 2000/12/23 23:14:37 itojun Exp $");
     34 #endif /* LIBC_SCCS and not lint */
     35 
     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