1 /* Find the length of STRING + 1, but scan at most MAXLEN bytes. 2 Copyright (C) 2005-2006, 2009-2012 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17 #include <config.h> 18 19 /* Specification. */ 20 #include "strnlen1.h" 21 22 #include <string.h> 23 24 /* Find the length of STRING + 1, but scan at most MAXLEN bytes. 25 If no '\0' terminator is found in that many characters, return MAXLEN. */ 26 /* This is the same as strnlen (string, maxlen - 1) + 1. */ 27 size_t 28 strnlen1 (const char *string, size_t maxlen) 29 { 30 const char *end = (const char *) memchr (string, '\0', maxlen); 31 if (end != NULL) 32 return end - string + 1; 33 else 34 return maxlen; 35 } 36