1 /* Find the length of STRING, but scan at most MAXLEN characters. 2 Copyright (C) 2005-2007, 2009-2012 Free Software Foundation, Inc. 3 Written by Simon Josefsson. 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 3, 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 16 along with this program; if not, see <http://www.gnu.org/licenses/>. */ 17 18 #include <config.h> 19 20 #include <string.h> 21 22 /* Find the length of STRING, but scan at most MAXLEN characters. 23 If no '\0' terminator is found in that many characters, return MAXLEN. */ 24 25 size_t 26 strnlen (const char *string, size_t maxlen) 27 { 28 const char *end = memchr (string, '\0', maxlen); 29 return end ? (size_t) (end - string) : maxlen; 30 } 31
