1 /* $Id: strspn.c 6118 2003-01-13 06:44:24Z rra $
2 **
3 ** This file has been modified to get it to compile more easily
4 ** on pre-4.4BSD systems. Rich $alz, June 1991.
5 */
6
7 #include "config.h"
8 #include "clibrary.h"
9
10
11 /*
12 * Copyright (c) 1989 The Regents of the University of California.
13 * All rights reserved.
14 *
15 * Redistribution and use in source and binary forms are permitted
16 * provided that: (1) source distributions retain this entire copyright
17 * notice and comment, and (2) distributions including binaries display
18 * the following acknowledgement: ``This product includes software
19 * developed by the University of California, Berkeley and its contributors''
20 * in the documentation or other materials provided with the distribution
21 * and in all advertising materials mentioning features or use of this
22 * software. Neither the name of the University nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
27 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
28 */
29
30 #if 0
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char sccsid[] = "@(#)strspn.c 5.7 (Berkeley) 6/1/90";
33 #endif /* LIBC_SCCS and not lint */
34
35 #include <sys/stdc.h>
36 #include <string.h>
37 #endif
38
39 /*
40 * Span the string s2 (skip characters that are in s2).
41 */
42 size_t
strspn(s1,s2)43 strspn(s1, s2)
44 const char *s1;
45 const char *s2;
46 {
47 const char *p = s1, *spanp;
48 char c, sc;
49
50 /*
51 * Skip any characters in s2, excluding the terminating \0.
52 */
53 cont:
54 c = *p++;
55 for (spanp = s2; (sc = *spanp++) != 0;)
56 if (sc == c)
57 goto cont;
58 return (p - 1 - s1);
59 }
60