kc3-lang/gnulib/lib/modfl.c

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• lib/modfl.c

• /* Get signed integer and fractional parts of a floating-point number.
     Copyright (C) 2012-2023 Free Software Foundation, Inc.
  
     This file is free software: you can redistribute it and/or modify
     it under the terms of the GNU Lesser General Public License as
     published by the Free Software Foundation, either version 3 of the
     License, or (at your option) any later version.
  
     This file 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 Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <math.h>
  
  #if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
  
  long double
  modfl (long double x, long double *iptr)
  {
    double integer_part;
    double fractional_part = modf (x, &integer_part);
    *iptr = integer_part;
    return fractional_part;
  }
  
  #else
  
  long double
  modfl (long double x, long double *iptr)
  {
    if (isfinite (x))
      {
        long double integer_part = truncl (x);
        *iptr = integer_part;
        return x - integer_part;
      }
    else
      {
        if (isinf (x))
          {
            *iptr = x;
            return 1.0L / x;
          }
        else /* isnanl (x) */
          {
            *iptr = x;
            return x;
          }
      }
  }
  
  #endif
  

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