1 /*
2 FUNCTION
3 <<wcsspn>>---get length of a wide substring
4
5 SYNOPSIS
6 #include <wchar.h>
7 size_t wcsspn(const wchar_t *<[s]>, const wchar_t *<[set]>);
8
9 DESCRIPTION
10 The <<wcsspn>> function computes the length of the maximum initial
11 segment of the wide-character string pointed to by <[s]> which consists
12 entirely of wide-character codes from the wide-character string
13 pointed to by <[set]>.
14
15 RETURNS
16 The wcsspn() function returns the length <[s1]>; no return value is
17 reserved to indicate an error.
18
19 PORTABILITY
20 <<wcsspn>> is ISO/IEC 9899/AMD1:1995 (ISO C).
21
22 No supporting OS subroutines are required.
23 */
24
25 /* $NetBSD: wcsspn.c,v 1.1 2000/12/23 23:14:37 itojun Exp $ */
26
27 /*-
28 * Copyright (c)1999 Citrus Project,
29 * All rights reserved.
30 *
31 * Redistribution and use in source and binary forms, with or without
32 * modification, are permitted provided that the following conditions
33 * are met:
34 * 1. Redistributions of source code must retain the above copyright
35 * notice, this list of conditions and the following disclaimer.
36 * 2. Redistributions in binary form must reproduce the above copyright
37 * notice, this list of conditions and the following disclaimer in the
38 * documentation and/or other materials provided with the distribution.
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * citrus Id: wcsspn.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
53 */
54
55 #include <_ansi.h>
56 #include <wchar.h>
57
58 size_t
wcsspn(const wchar_t * s,const wchar_t * set)59 wcsspn (const wchar_t * s,
60 const wchar_t * set)
61 {
62 const wchar_t *p;
63 const wchar_t *q;
64
65 p = s;
66 while (*p)
67 {
68 q = set;
69 while (*q)
70 {
71 if (*p == *q)
72 break;
73 q++;
74 }
75 if (!*q)
76 goto done;
77 p++;
78 }
79
80 done:
81 return (p - s);
82 }
83
