lib/strncat.c

   1 /* Concatenate strings.
   2    Copyright (C) 1999, 2002, 2006, 2010-2018 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2002.
   4
   5    This program is free software: you can redistribute it and/or modify it
   6    under the terms of the GNU Lesser General Public License as published
   7    by the Free Software Foundation; either version 3 of the License, or
   8    (at your option) 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 GNU
  13    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 }