1  /* Concatenate strings.
       2     Copyright (C) 1999, 2002, 2006, 2010-2023 Free Software Foundation, Inc.
       3     Written by Bruno Haible <bruno@clisp.org>, 2002.
       4  
       5     This file is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU Lesser General Public License as
       7     published by the Free Software Foundation; either version 2.1 of the
       8     License, or (at your option) any later version.
       9  
      10     This file 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 Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public License
      16     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <config.h>
      19  
      20  /* Specification.  */
      21  #include <string.h>
      22  
      23  char *
      24  strncat (char *dest, const char *src, size_t n)
      25  {
      26    char *destptr = dest + strlen (dest);
      27  
      28    for (; n > 0 && (*destptr = *src) != '\0'; src++, destptr++, n--)
      29      ;
      30    if (n == 0)
      31      *destptr = '\0';
      32    return dest;
      33  }