1  /* Find the length of STRING + 1, but scan at most MAXLEN bytes.
       2     Copyright (C) 2005-2006, 2009-2023 Free Software Foundation, Inc.
       3  
       4     This file is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU Lesser General Public License as
       6     published by the Free Software Foundation; either version 2.1 of the
       7     License, or (at your option) any later version.
       8  
       9     This file 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 Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public License
      15     along with this program.  If not, see <https://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  }