1 /* @(#)wcsnlen.c 1.3 10/05/07 Copyright 2010 J. Schilling */ 2 /* 3 * wcsnlen() to be used if missing in libc 4 * 5 * Copyright (c) 2010 J. Schilling 6 */ 7 /* 8 * The contents of this file are subject to the terms of the 9 * Common Development and Distribution License, Version 1.0 only 10 * (the "License"). You may not use this file except in compliance 11 * with the License. 12 * 13 * See the file CDDL.Schily.txt in this distribution for details. 14 * A copy of the CDDL is also available via the Internet at 15 * http://www.opensource.org/licenses/cddl1.txt 16 * 17 * When distributing Covered Code, include this CDDL HEADER in each 18 * file and include the License file CDDL.Schily.txt from this distribution. 19 */ 20 21 #include <schily/standard.h> 22 #include <schily/unistd.h> 23 #include <schily/wchar.h> 24 #include <schily/schily.h> 25 26 #ifndef HAVE_WCSNLEN 27 28 EXPORT size_t wcsnlen(s,len)29wcsnlen(s, len) 30 register const wchar_t *s; 31 register size_t len; 32 { 33 register const wchar_t *rs = s; 34 35 if (len == 0) 36 return (0); 37 38 while (*rs++ != '\0' && --len > 0) 39 ; 40 if (len == 0) 41 return (rs - s); 42 return (--rs - s); 43 } 44 45 #endif 46