sysdeps/ieee754/ldbl-128ibm/tst-strtold-ldbl-128ibm.c

   1 /* Test for ldbl-128ibm strtold overflow to infinity (bug 14551).
   2    Copyright (C) 2015-2017 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <fenv.h>
  21 #include <math.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24
  25 static int
  26 test_strtold_value (const char *s, double exp_hi, double exp_lo, int exp_exc,
  27                     int exp_errno)
  28 {
  29   int result = 0;
  30   union { long double ld; double d[2]; } x;
  31   feclearexcept (FE_ALL_EXCEPT);
  32   errno = 0;
  33   x.ld = strtold (s, NULL);
  34   int exc = fetestexcept (FE_ALL_EXCEPT);
  35   int new_errno = errno;
  36   printf ("strtold (\"%s\") returned (%a, %a), exceptions 0x%x, errno %d\n",
  37           s, x.d[0], x.d[1], exc, new_errno);
  38   if (x.d[0] == exp_hi)
  39     printf ("PASS: strtold (\"%s\") high == %a\n", s, exp_hi);
  40   else
  41     {
  42       printf ("FAIL: strtold (\"%s\") high == %a\n", s, exp_hi);
  43       result = 1;
  44     }
  45   if (x.d[1] == exp_lo)
  46     printf ("PASS: strtold (\"%s\") low == %a\n", s, exp_lo);
  47   else
  48     {
  49       printf ("FAIL: strtold (\"%s\") low == %a\n", s, exp_lo);
  50       result = 1;
  51     }
  52   if (exc == exp_exc)
  53     printf ("PASS: strtold (\"%s\") exceptions 0x%x\n", s, exp_exc);
  54   else
  55     {
  56       printf ("FAIL: strtold (\"%s\") exceptions 0x%x\n", s, exp_exc);
  57       result = 1;
  58     }
  59   if (new_errno == exp_errno)
  60     printf ("PASS: strtold (\"%s\") errno %d\n", s, exp_errno);
  61   else
  62     {
  63       printf ("FAIL: strtold (\"%s\") errno %d\n", s, exp_errno);
  64       result = 1;
  65     }
  66   return result;
  67 }
  68
  69 static int
  70 do_test (void)
  71 {
  72   int result = 0;
  73   result |= test_strtold_value ("0x1.fffffffffffff8p+1023", INFINITY, 0,
  74                                 FE_OVERFLOW | FE_INEXACT, ERANGE);
  75   result |= test_strtold_value ("-0x1.fffffffffffff8p+1023", -INFINITY, 0,
  76                                 FE_OVERFLOW | FE_INEXACT, ERANGE);
  77   result |= test_strtold_value ("0x1.ffffffffffffffp+1023", INFINITY, 0,
  78                                 FE_OVERFLOW | FE_INEXACT, ERANGE);
  79   result |= test_strtold_value ("-0x1.ffffffffffffffp+1023", -INFINITY, 0,
  80                                 FE_OVERFLOW | FE_INEXACT, ERANGE);
  81   return result;
  82 }
  83
  84 #define TEST_FUNCTION do_test ()
  85 #include "../../../test-skeleton.c"