1/* Find the length of STRING, but scan at most MAXLEN characters. 2 Copyright (C) 1996, 1997, 1998, 2000-2003 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2, or (at your option) 8 any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License along 16 with this program; if not, write to the Free Software Foundation, 17 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 18 19#if HAVE_CONFIG_H 20# include <config.h> 21#endif 22#undef strnlen 23 24#include <string.h> 25 26#undef __strnlen 27#undef strnlen 28 29#ifndef _LIBC 30# define strnlen rpl_strnlen 31#endif 32 33#ifndef weak_alias 34# define __strnlen strnlen 35#endif 36 37/* Find the length of STRING, but scan at most MAXLEN characters. 38 If no '\0' terminator is found in that many characters, return MAXLEN. */ 39 40size_t 41__strnlen (const char *string, size_t maxlen) 42{ 43 const char *end = memchr (string, '\0', maxlen); 44 return end ? (size_t) (end - string) : maxlen; 45} 46#ifdef weak_alias 47weak_alias (__strnlen, strnlen) 48#endif 49