math/test-fenv-preserve.c

   1 /* Test fegetenv preserves exception mask (bug 16198).
   2    Copyright (C) 2014-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv.h>
  20 #include <stdio.h>
  21
  22 static int
  23 do_test (void)
  24 {
  25 #if FE_ALL_EXCEPT
  26   fenv_t env;
  27
  28   if (feenableexcept (FE_INVALID) != 0)
  29     {
  30       puts ("feenableexcept (FE_INVALID) failed, cannot test");
  31       return 0;
  32     }
  33
  34   if (fegetenv (&env) != 0)
  35     {
  36       puts ("fegetenv failed, cannot test");
  37       return 0;
  38     }
  39
  40   int ret = fegetexcept ();
  41   if (ret == FE_INVALID)
  42     {
  43       puts ("fegetenv preserved exception mask, OK");
  44       return 0;
  45     }
  46   else
  47     {
  48       printf ("fegetexcept returned %d, expected %d\n", ret, FE_INVALID);
  49       return 1;
  50     }
  51 #else
  52   puts ("No exceptions defined, cannot test");
  53   return 0;
  54 #endif
  55 }
  56
  57 #define TEST_FUNCTION do_test ()
  58 #include "../test-skeleton.c"