xref: /src/lib/libc/string/wcsspn.c

/*	$NetBSD: wcsspn.c,v 1.4 2011/11/21 15:02:48 joerg Exp $	*/

/*-
 * Copyright (c)1999,2001 Citrus Project,
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 *	$Citrus: xpg4dl/FreeBSD/lib/libc/string/wcsspn.c,v 1.3 2001/09/21 16:06:43 yamt Exp $
 */

#include <sys/cdefs.h>
__RCSID("$NetBSD: wcsspn.c,v 1.4 2011/11/21 15:02:48 joerg Exp $");

#include <assert.h>
#include <wchar.h>

size_t
wcsspn(const wchar_t *s, const wchar_t *set)
{
	const wchar_t *p;
	const wchar_t *q;

	_DIAGASSERT(s != NULL);
	_DIAGASSERT(set != NULL);

	for (p = s; *p; ++p) {
		for (q = set; *q; ++q) {
			if (*p == *q)
				break;
		}
		if (!*q)
			break;
	}

	return (p - s);
}