lib/reallocarray.c

   1 /* reallocarray function that is glibc compatible.
   2
   3    Copyright (C) 2017-2018 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU 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 <stdlib.h>
  23 #include <errno.h>
  24
  25 #include "xalloc-oversized.h"
  26
  27 void *
  28 reallocarray (void *ptr, size_t nmemb, size_t size)
  29 {
  30     if (xalloc_oversized (nmemb, size))
  31       {
  32         errno = ENOMEM;
  33         return NULL;
  34       }
  35
  36     /* Rely on the semantics of GNU realloc.  */
  37     return realloc (ptr, nmemb * size);
  38 }