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 35 size_t 36 wcsnlen(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