1  /* reallocarray function that is glibc compatible.
       2  
       3     Copyright (C) 2017-2021 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 "intprops.h"
      26  
      27  void *
      28  reallocarray (void *ptr, size_t nmemb, size_t size)
      29  {
      30    size_t nbytes;
      31    if (INT_MULTIPLY_WRAPV (nmemb, size, &nbytes))
      32      {
      33        errno = ENOMEM;
      34        return NULL;
      35      }
      36  
      37    /* Rely on the semantics of GNU realloc.  */
      38    return realloc (ptr, nbytes);
      39  }