gl/reallocarray.c

   1 /* reallocarray function that is glibc compatible.
   2
   3    Copyright (C) 2017-2023 Free Software Foundation, Inc.
   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 /* written by Darshit Shah */
  19
  20 #include <config.h>
  21
  22 #include <stdckdint.h>
  23 #include <stdlib.h>
  24 #include <errno.h>
  25
  26 void *
  27 reallocarray (void *ptr, size_t nmemb, size_t size)
  28 {
  29   size_t nbytes;
  30   if (ckd_mul (&nbytes, nmemb, size))
  31     {
  32       errno = ENOMEM;
  33       return NULL;
  34     }
  35
  36   /* Rely on the semantics of GNU realloc.  */
  37   return realloc (ptr, nbytes);
  38 }