stdlib/bug-strtod.c

   1 /* Test to strtod etc for numbers like x000...0000.000e-nn.
   2    This file is part of the GNU C Library.
   3    Copyright (C) 2001-2015 Free Software Foundation, Inc.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24
  25 int
  26 main (void)
  27 {
  28   char buf[300];
  29   int cnt;
  30   int result = 0;
  31
  32   for (cnt = 0; cnt < 200; ++cnt)
  33     {
  34       ssize_t n;
  35       float f;
  36
  37       n = sprintf (buf, "%d", cnt);
  38       memset (buf + n, '0', cnt);
  39       sprintf (buf + n + cnt, ".000e-%d", cnt);
  40       f = strtof (buf, NULL);
  41
  42       if (f != (float) cnt)
  43         {
  44           printf ("strtof(\"%s\") failed for cnt == %d (%g instead of %g)\n",
  45                   buf, cnt, f, (float) cnt);
  46           result = 1;
  47         }
  48       else
  49         printf ("strtof() fine for cnt == %d\n", cnt);
  50     }
  51
  52   for (cnt = 0; cnt < 200; ++cnt)
  53     {
  54       ssize_t n;
  55       double f;
  56
  57       n = sprintf (buf, "%d", cnt);
  58       memset (buf + n, '0', cnt);
  59       sprintf (buf + n + cnt, ".000e-%d", cnt);
  60       f = strtod (buf, NULL);
  61
  62       if (f != (double) cnt)
  63         {
  64           printf ("strtod(\"%s\") failed for cnt == %d (%g instead of %g)\n",
  65                   buf, cnt, f, (double) cnt);
  66           result = 1;
  67         }
  68       else
  69         printf ("strtod() fine for cnt == %d\n", cnt);
  70     }
  71
  72   for (cnt = 0; cnt < 200; ++cnt)
  73     {
  74       ssize_t n;
  75       long double f;
  76
  77       n = sprintf (buf, "%d", cnt);
  78       memset (buf + n, '0', cnt);
  79       sprintf (buf + n + cnt, ".000e-%d", cnt);
  80       f = strtold (buf, NULL);
  81
  82       if (f != (long double) cnt)
  83         {
  84           printf ("strtold(\"%s\") failed for cnt == %d (%Lg instead of %Lg)\n",
  85                   buf, cnt, f, (long double) cnt);
  86           result = 1;
  87         }
  88       else
  89         printf ("strtold() fine for cnt == %d\n", cnt);
  90     }
  91
  92   return result;
  93 }