1 /* $OpenBSD: wcsstr.c,v 1.5 2015/10/01 02:32:07 guenther Exp $ */
2 /* $NetBSD: wcsstr.c,v 1.3 2003/03/05 20:18:17 tshiozak Exp $ */
3
4 /*-
5 * Copyright (c)1999 Citrus Project,
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * citrus Id: wcsstr.c,v 1.2 2000/12/21 05:07:25 itojun Exp
30 */
31
32 #include <wchar.h>
33
34 wchar_t *
35 #ifdef WCSWCS
wcswcs(const wchar_t * big,const wchar_t * little)36 wcswcs(const wchar_t *big, const wchar_t *little)
37 #else
38 wcsstr(const wchar_t *big, const wchar_t *little)
39 #endif
40 {
41 const wchar_t *p;
42 const wchar_t *q;
43 const wchar_t *r;
44
45 if (!*little) {
46 return (wchar_t *)big;
47 }
48 if (wcslen(big) < wcslen(little))
49 return NULL;
50
51 p = big;
52 q = little;
53 while (*p) {
54 q = little;
55 r = p;
56 while (*q) {
57 if (*r != *q)
58 break;
59 q++;
60 r++;
61 }
62 if (!*q) {
63 return (wchar_t *)p;
64 }
65 p++;
66 }
67 return NULL;
68 }
69 #ifndef WCSWCS
70 DEF_STRONG(wcsstr);
71 #endif
72