tests/test-trunc1.c

   1 /* Test of rounding towards zero.
   2    Copyright (C) 2007-2020 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  18
  19 #include <config.h>
  20
  21 #include <math.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (trunc, double, (double));
  25
  26 #include "isnand-nolibm.h"
  27 #include "minus-zero.h"
  28 #include "infinity.h"
  29 #include "nan.h"
  30 #include "macros.h"
  31
  32 int
  33 main ()
  34 {
  35   /* Zero.  */
  36   ASSERT (trunc (0.0) == 0.0);
  37   ASSERT (trunc (minus_zerod) == 0.0);
  38   /* Positive numbers.  */
  39   ASSERT (trunc (0.3) == 0.0);
  40   ASSERT (trunc (0.7) == 0.0);
  41   ASSERT (trunc (1.0) == 1.0);
  42   ASSERT (trunc (1.5) == 1.0);
  43   ASSERT (trunc (1.999) == 1.0);
  44   ASSERT (trunc (2.0) == 2.0);
  45   ASSERT (trunc (65535.999) == 65535.0);
  46   ASSERT (trunc (65536.0) == 65536.0);
  47   ASSERT (trunc (2.341e31) == 2.341e31);
  48   /* Negative numbers.  */
  49   ASSERT (trunc (-0.3) == 0.0);
  50   ASSERT (trunc (-0.7) == 0.0);
  51   ASSERT (trunc (-1.0) == -1.0);
  52   ASSERT (trunc (-1.5) == -1.0);
  53   ASSERT (trunc (-1.999) == -1.0);
  54   ASSERT (trunc (-2.0) == -2.0);
  55   ASSERT (trunc (-65535.999) == -65535.0);
  56   ASSERT (trunc (-65536.0) == -65536.0);
  57   ASSERT (trunc (-2.341e31) == -2.341e31);
  58   /* Infinite numbers.  */
  59   ASSERT (trunc (Infinityd ()) == Infinityd ());
  60   ASSERT (trunc (- Infinityd ()) == - Infinityd ());
  61   /* NaNs.  */
  62   ASSERT (isnand (trunc (NaNd ())));
  63
  64   return 0;
  65 }