/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strspn.c	5.6 (Berkeley) 05/17/90";
#endif /* LIBC_SCCS and not lint */

#include <sys/stdc.h>
#include <string.h>

/*
 * Span the string s2 (skip characters that are in s2).
 */
size_t
strspn(s1, s2)
	const char *s1;
	register const char *s2;
{
	register const char *p = s1, *spanp;
	register char c, sc;

	/*
	 * Skip any characters in s2, excluding the terminating \0.
	 */
cont:
	c = *p++;
	for (spanp = s2; (sc = *spanp++) != 0;)
		if (sc == c)
			goto cont;
	return (p - 1 - s1);
}