tests/test-reallocarray.c

   1 /* Test of reallocarray function.
   2    Copyright (C) 2010-2020 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 #include <stdlib.h>
  20 #include <errno.h>
  21
  22 #include "signature.h"
  23 SIGNATURE_CHECK (reallocarray, void *, (void *, size_t, size_t));
  24
  25 int
  26 main ()
  27 {
  28    size_t n;
  29
  30    /* Check that reallocarray fails when requested to allocate a block
  31       of memory larger than SIZE_MAX bytes.  */
  32    for (n = 2; n != 0; n <<= 1)
  33      {
  34        if (reallocarray (NULL, (size_t) -1 / n + 1, n))
  35          return 1;
  36
  37        /* Ensure that errno is correctly set.  */
  38        if (errno != ENOMEM)
  39          return 1;
  40      }
  41
  42    return 0;
  43 }