1  /* calloc() function that is glibc compatible.
       2     This wrapper function is required at least on Tru64 UNIX 5.1 and mingw.
       3     Copyright (C) 2004-2007, 2009-2023 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 Jim Meyering and Bruno Haible */
      19  
      20  #include <config.h>
      21  
      22  /* Specification.  */
      23  #include <stdlib.h>
      24  
      25  #include <errno.h>
      26  
      27  #include "xalloc-oversized.h"
      28  
      29  /* Call the system's calloc below.  */
      30  #undef calloc
      31  
      32  /* Allocate and zero-fill an NxS-byte block of memory from the heap,
      33     even if N or S is zero.  */
      34  
      35  void *
      36  rpl_calloc (size_t n, size_t s)
      37  {
      38    if (n == 0 || s == 0)
      39      n = s = 1;
      40  
      41    if (xalloc_oversized (n, s))
      42      {
      43        errno = ENOMEM;
      44        return NULL;
      45      }
      46  
      47    void *result = calloc (n, s);
      48  
      49  #if !HAVE_MALLOC_POSIX
      50    if (result == NULL)
      51      errno = ENOMEM;
      52  #endif
      53  
      54    return result;
      55  }