math/test-misc.c

   1 /* Miscellaneous tests which don't fit anywhere else.
   2    Copyright (C) 2000 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <math.h>
  21 #include <stdio.h>
  22
  23
  24 int
  25 main (void)
  26 {
  27   int result = 0;
  28
  29   if (sizeof (long double) >= 12)
  30     {
  31       long double x = 0x100000001ll + (long double) 0.5;
  32       long double q;
  33       long double r;
  34
  35       r = modfl (x, &q);
  36       if (q != (long double) 0x100000001ll || r != 0.5)
  37         {
  38           printf ("modfl (%Lg, ...) failed\n", x);
  39           result = 1;
  40         }
  41     }
  42
  43   {
  44     double x = 0x100000001ll + (double) 0.5;
  45     double q;
  46     double r;
  47
  48     r = modf (x, &q);
  49     if (q != (double) 0x100000001ll || r != 0.5)
  50       {
  51         printf ("modf (%g, ...) failed\n", x);
  52         result = 1;
  53       }
  54   }
  55
  56   return result;
  57 }