1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26/*
27 * Returns the number of non-NULL characters in str,
28 * but not more than maxlen.  Does not look past str + maxlen.
29 */
30
31#include "lint.h"
32#include <stdlib.h>
33#include <wchar.h>
34
35size_t
36wcsnlen(const wchar_t *str, size_t maxlen)
37{
38	const wchar_t *ptr = str;
39
40	if (maxlen != 0) {
41		do {
42			if (*ptr++ == L'\0') {
43				ptr--;
44				break;
45			}
46		} while (--maxlen != 0);
47	}
48
49	return (ptr - str);
50}
51