Function eval_frexp

extern/boost/boost/multiprecision/cpp_dec_float.hpp:3390–3414

template <unsigned Digits10, class ExponentType, class Allocator>
inline void eval_frexp(cpp_dec_float<Digits10, ExponentType, Allocator>& result, const cpp_dec_float<Digits10, ExponentType, Allocator>& x, ExponentType* e)
{
   result = x;

   if (result.iszero() || (result.isinf)() || (result.isnan)())
   {
      *e = 0;
      return;
   }

   if (result.isneg())
      result.negate();

   typename cpp_dec_float<Digits10, ExponentType, Allocator>::exponent_type t = result.order();
   BOOST_MP_USING_ABS
   if (abs(t) < ((std::numeric_limits<typename cpp_dec_float<Digits10, ExponentType, Allocator>::exponent_type>::max)() / 1000))
   {
      t *= 1000;
      t /= 301;
   }
   else
   {
      t /= 301;
      t *= 1000;
   }

   result *= cpp_dec_float<Digits10, ExponentType, Allocator>::pow2(-t);