/*      $NetBSD: strspn.c,v 1.2 2009/03/14 21:04:10 dsl Exp $   */

/*
* Copyright (c) 1989, 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)strspn.c    8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: strspn.c,v 1.2 2009/03/14 21:04:10 dsl Exp $");
#endif
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>

#define _DIAGASSERT(x)  (void)0

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

       _DIAGASSERT(s1 != NULL);
       _DIAGASSERT(s2 != NULL);

       /*
        * 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);
}