math/test-fetestexceptflag.c

   1 /* Test fetestexceptflag.
   2    Copyright (C) 2016-2021 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 #include <math-tests.h>
  22
  23 static int
  24 test_one (int exc_test, int exc_set, int exc_save)
  25 {
  26   int result = 0;
  27
  28   printf ("Individual test: %x %x %x\n", (unsigned int) exc_test,
  29           (unsigned int) exc_set, (unsigned int) exc_save);
  30
  31   feclearexcept (FE_ALL_EXCEPT);
  32   int ret = fesetexcept (exc_set);
  33   if (ret != 0)
  34     {
  35       puts ("fesetexcept failed");
  36       if (exc_set == 0 || EXCEPTION_TESTS (float))
  37         {
  38           puts ("failure of fesetexcept was unexpected");
  39           result = 1;
  40         }
  41       else
  42         puts ("failure of fesetexcept OK, skipping further tests");
  43       return result;
  44     }
  45   fexcept_t saved;
  46   ret = fegetexceptflag (&saved, exc_save);
  47   if (ret == 0)
  48     puts ("fegetexceptflag succeeded");
  49   else
  50     {
  51       puts ("fegetexceptflag failed");
  52       result = 1;
  53       return result;
  54     }
  55   ret = fetestexceptflag (&saved, exc_test);
  56   if (ret == (exc_set & exc_test))
  57     puts ("fetestexceptflag result correct");
  58   else
  59     {
  60       printf ("fetestexceptflag returned %x, expected %x\n", ret,
  61               exc_set & exc_test);
  62       result = 1;
  63     }
  64   if (exc_save == FE_ALL_EXCEPT)
  65     {
  66       /* Also test fetestexceptflag testing all exceptions but
  67          possibly with only some set.  */
  68       ret = fetestexceptflag (&saved, FE_ALL_EXCEPT);
  69       if (ret == exc_set)
  70         puts ("fetestexceptflag (FE_ALL_EXCEPT) result correct");
  71       else
  72         {
  73           printf ("fetestexceptflag (FE_ALL_EXCEPT) returned %x, expected %x\n",
  74                   ret, exc_set);
  75           result = 1;
  76         }
  77     }
  78   return result;
  79 }
  80
  81 static int
  82 test_fetestexceptflag (int exc, const char *exc_name)
  83 {
  84   int result = 0;
  85
  86   printf ("Testing %s\n", exc_name);
  87
  88   /* Test each case of: whether this exception is set or clear;
  89      whether other exceptions are set or clear; whether the whole
  90      state is saved or just the state for this exception.  */
  91   result |= test_one (exc, 0, exc);
  92   result |= test_one (exc, 0, FE_ALL_EXCEPT);
  93   result |= test_one (exc, exc, exc);
  94   result |= test_one (exc, exc, FE_ALL_EXCEPT);
  95   result |= test_one (exc, FE_ALL_EXCEPT & ~exc, exc);
  96   result |= test_one (exc, FE_ALL_EXCEPT & ~exc, FE_ALL_EXCEPT);
  97   result |= test_one (exc, FE_ALL_EXCEPT, exc);
  98   result |= test_one (exc, FE_ALL_EXCEPT, FE_ALL_EXCEPT);
  99
 100   return result;
 101 }
 102
 103 static int
 104 do_test (void)
 105 {
 106   int result = 0;
 107
 108   result |= test_fetestexceptflag (0, "0");
 109   result |= test_fetestexceptflag (FE_ALL_EXCEPT, "FE_ALL_EXCEPT");
 110 #ifdef FE_DIVBYZERO
 111   result |= test_fetestexceptflag (FE_DIVBYZERO, "FE_DIVBYZERO");
 112 #endif
 113 #ifdef FE_INEXACT
 114   result |= test_fetestexceptflag (FE_INEXACT, "FE_INEXACT");
 115 #endif
 116 #ifdef FE_INVALID
 117   result |= test_fetestexceptflag (FE_INVALID, "FE_INVALID");
 118 #endif
 119 #ifdef FE_OVERFLOW
 120   result |= test_fetestexceptflag (FE_OVERFLOW, "FE_OVERFLOW");
 121 #endif
 122 #ifdef FE_UNDERFLOW
 123   result |= test_fetestexceptflag (FE_UNDERFLOW, "FE_UNDERFLOW");
 124 #endif
 125
 126   return result;
 127 }
 128
 129 #define TEST_FUNCTION do_test ()
 130 #include "../test-skeleton.c"