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

• /* Test setpayloadl.
     Copyright 2024-2025 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/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <math.h>
  
  #include "signature.h"
  SIGNATURE_CHECK (setpayloadl, int, (long double *, long double));
  
  #include <float.h>
  
  #include "infinity.h"
  #include "isnanl-nolibm.h"
  #include "macros.h"
  
  #if defined __powerpc__ && LDBL_MANT_DIG == 106
    /* This is PowerPC "double double", a pair of two doubles.  NaN is represented
       as the corresponding 64-bit IEEE value in the first double; the second is
       irrelevant and therefore does not contain a payload.  */
  # define PAYLOAD_BITS (DBL_MANT_DIG - 2)
  #else
  # define PAYLOAD_BITS (LDBL_MANT_DIG - 2)
  #endif
  
  int
  main ()
  {
    int i;
    long double p;
  
    {
      /* Test valid payloads.  */
      for (i = 0, p = 1.0L; i < PAYLOAD_BITS; i++, p *= 2.0L)
        {
          int ret;
          long double x;
  
          ret = setpayloadl (&x, p);
          ASSERT (ret == 0);
          ASSERT (isnanl (x));
        }
      /* Test out-of-range payload.  */
      int ret;
      long double x;
  
      ret = setpayloadl (&x, p);
      ASSERT (ret != 0);
      ASSERT (x == 0.0L);
    }
  
    /* Test infinite payload.  */
    {
      int ret;
      long double x;
  
      ret = setpayloadl (&x, Infinityl ());
      ASSERT (ret != 0);
      ASSERT (x == 0.0L);
    }
  
    /* Test negative payload.  */
    {
      int ret;
      long double x;
  
      ret = setpayloadl (&x, -1.0L);
      ASSERT (ret != 0);
      ASSERT (x == 0.0L);
    }
  
    /* Test fractional payload.  */
    {
      int ret;
      long double x;
  
      ret = setpayloadl (&x, 1.4L);
      ASSERT (ret != 0);
      ASSERT (x == 0.0L);
    }
  
    return test_exit_status;
  }
  

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