1  /* Test of rounding towards zero.
       2     Copyright (C) 2007-2022 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  }