kc3-lang/gnulib/tests/test-signbit.c

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• Hash : 7b089321
  Author :
  Date : 2025-01-01T09:24:36
  

  maint: run 'make update-copyright'
  

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• tests/test-signbit.c

• /* Test of signbit() substitute.
     Copyright (C) 2007-2025 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  
  #include <config.h>
  
  #include <math.h>
  
  /* signbit must be a macro.  */
  #ifndef signbit
  # error missing declaration
  #endif
  
  #include <float.h>
  #include <limits.h>
  
  #include "minus-zero.h"
  #include "infinity.h"
  #include "signed-nan.h"
  #include "signed-snan.h"
  #include "macros.h"
  
  float zerof = 0.0f;
  double zerod = 0.0;
  long double zerol = 0.0L;
  
  static void
  test_signbitf ()
  {
    /* Finite values.  */
    ASSERT (!signbit (3.141f));
    ASSERT (!signbit (3.141e30f));
    ASSERT (!signbit (3.141e-30f));
    ASSERT (signbit (-2.718f));
    ASSERT (signbit (-2.718e30f));
    ASSERT (signbit (-2.718e-30f));
    /* Zeros.  */
    ASSERT (!signbit (0.0f));
    if (1.0f / minus_zerof < 0)
      ASSERT (signbit (minus_zerof));
    else
      ASSERT (!signbit (minus_zerof));
    /* Infinite values.  */
    ASSERT (!signbit (Infinityf ()));
    ASSERT (signbit (- Infinityf ()));
    /* Quiet NaN.  */
    ASSERT (!signbit (positive_NaNf ()));
    ASSERT (signbit (negative_NaNf ()));
  #if HAVE_SNANF
    /* Signalling NaN.  */
    ASSERT (!signbit (positive_SNaNf ()));
    ASSERT (signbit (negative_SNaNf ()));
  #endif
  }
  
  static void
  test_signbitd ()
  {
    /* Finite values.  */
    ASSERT (!signbit (3.141));
    ASSERT (!signbit (3.141e30));
    ASSERT (!signbit (3.141e-30));
    ASSERT (signbit (-2.718));
    ASSERT (signbit (-2.718e30));
    ASSERT (signbit (-2.718e-30));
    /* Zeros.  */
    ASSERT (!signbit (0.0));
    if (1.0 / minus_zerod < 0)
      ASSERT (signbit (minus_zerod));
    else
      ASSERT (!signbit (minus_zerod));
    /* Infinite values.  */
    ASSERT (!signbit (Infinityd ()));
    ASSERT (signbit (- Infinityd ()));
    /* Quiet NaN.  */
    ASSERT (!signbit (positive_NaNd ()));
    ASSERT (signbit (negative_NaNd ()));
  #if HAVE_SNAND
    /* Signalling NaN.  */
    ASSERT (!signbit (positive_SNaNd ()));
    ASSERT (signbit (negative_SNaNd ()));
  #endif
  }
  
  static void
  test_signbitl ()
  {
    /* Finite values.  */
    ASSERT (!signbit (3.141L));
    ASSERT (!signbit (3.141e30L));
    ASSERT (!signbit (3.141e-30L));
    ASSERT (signbit (-2.718L));
    ASSERT (signbit (-2.718e30L));
    ASSERT (signbit (-2.718e-30L));
    /* Zeros.  */
    ASSERT (!signbit (0.0L));
    if (1.0L / minus_zerol < 0)
      ASSERT (signbit (minus_zerol));
    else
      ASSERT (!signbit (minus_zerol));
    /* Infinite values.  */
    ASSERT (!signbit (Infinityl ()));
    ASSERT (signbit (- Infinityl ()));
    /* Quiet NaN.  */
    ASSERT (!signbit (positive_NaNl ()));
    ASSERT (signbit (negative_NaNl ()));
  #if HAVE_SNANL
    /* Signalling NaN.  */
    ASSERT (!signbit (positive_SNaNl ()));
    ASSERT (signbit (negative_SNaNl ()));
  #endif
  }
  
  int
  main ()
  {
    test_signbitf ();
    test_signbitd ();
    test_signbitl ();
    return test_exit_status;
  }
  

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