1/* Test file for mpfr_init2, mpfr_inits, mpfr_inits2 and mpfr_clears.
2
3Copyright 2003, 2006-2023 Free Software Foundation, Inc.
4Contributed by the AriC and Caramba projects, INRIA.
5
6This file is part of the GNU MPFR Library.
7
8The GNU MPFR Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 3 of the License, or (at your
11option) any later version.
12
13The GNU MPFR Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
20https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23#include "mpfr-test.h"
24
25int
26main (void)
27{
28  mpfr_t a, b, c;
29  long large_prec;
30
31  tests_start_mpfr ();
32
33  mpfr_inits (a, b, c, (mpfr_ptr) 0);
34  mpfr_clears (a, b, c, (mpfr_ptr) 0);
35  mpfr_inits2 (200, a, b, c, (mpfr_ptr) 0);
36  mpfr_clears (a, b, c, (mpfr_ptr) 0);
37
38  /* test for precision 2^31-1, see
39     https://gforge.inria.fr/tracker/index.php?func=detail&aid=13918 */
40  large_prec = 2147483647;
41  if (getenv ("MPFR_CHECK_LARGEMEM") != NULL)
42    {
43      size_t min_memory_limit;
44
45      /* We assume that the precision won't be increased internally. */
46      if (large_prec > MPFR_PREC_MAX)
47        large_prec = MPFR_PREC_MAX;
48
49      /* Increase tests_memory_limit if need be in order to avoid an
50         obvious failure due to insufficient memory, by choosing a bit
51         more than the memory used for the variables a and b. Note
52         that such an increase is necessary, but is not guaranteed to
53         be sufficient in all cases (e.g. with logging activated). */
54      min_memory_limit = 2 * (large_prec / MPFR_BYTES_PER_MP_LIMB) + 65536;
55      if (tests_memory_limit > 0 && tests_memory_limit < min_memory_limit)
56        tests_memory_limit = min_memory_limit;
57
58      mpfr_inits2 (large_prec, a, b, (mpfr_ptr) 0);
59      mpfr_set_ui (a, 17, MPFR_RNDN);
60      mpfr_set (b, a, MPFR_RNDN);
61      if (mpfr_get_ui (a, MPFR_RNDN) != 17)
62        {
63          printf ("Error in mpfr_init2 with precision 2^31-1\n");
64          exit (1);
65        }
66      mpfr_clears (a, b, (mpfr_ptr) 0);
67    }
68
69  tests_end_mpfr ();
70
71  return 0;
72}
73