1 /* $NetBSD: wcscspn.c,v 1.4 2011/11/24 18:44:25 joerg Exp $ */
2
3 /*-
4 * Copyright (c) 1999 Citrus Project,
5 * Copyright (c) 2011 Joerg Sonnenberger,
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: wcscspn.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
30 */
31
32 #include <sys/cdefs.h>
33 __RCSID("$NetBSD: wcscspn.c,v 1.4 2011/11/24 18:44:25 joerg Exp $");
34
35 #include <assert.h>
36 #include <inttypes.h>
37 #include <string.h>
38 #include <wchar.h>
39
40 #include "wcscspn_bloom.h"
41
42 size_t
wcscspn(const wchar_t * s,const wchar_t * set)43 wcscspn(const wchar_t *s, const wchar_t *set)
44 {
45 size_t bloom[BLOOM_ARRAY_SIZE];
46 const wchar_t *p;
47 const wchar_t *q;
48
49 _DIAGASSERT(s != NULL);
50 _DIAGASSERT(set != NULL);
51
52 if (set[0] == '\0')
53 return wcslen(s);
54 if (set[1] == '\0') {
55 for (p = s; *p; ++p)
56 if (*p == set[0])
57 break;
58 return p - s;
59 }
60
61 wcsspn_bloom_init(bloom, set);
62
63 for (p = s; *p; ++p) {
64 if (!wcsspn_in_bloom(bloom, *p))
65 continue;
66
67 q = set;
68 do {
69 if (*p == *q)
70 goto done;
71 } while (*++q);
72 }
73
74 done:
75 return (p - s);
76 }
77