@(#)frexp.3 6.3 (Berkeley) 04/13/87

.AT 3 frexp, ldexp, modf - split into mantissa and exponent

 double frexp(value, eptr)  double value;  int *eptr; 

 double ldexp(value, exp)  double value; 

 double modf(value, iptr)  double value, *iptr; 
 DESCRIPTION
Every nonzero number can be written uniquely as
where the ``mantissa'' (fraction) x is in the range 0.5 <= |x| < 1.0,
and the ``exponent'' n is an integer. Frexp returns the
mantissa of a double value, and stores the exponent indirectly in
the location pointed to by eptr. If value is 0, both results
returned by frexp are 0.

Ldexp returns the quantity

Modf returns the signed fractional part of value
and stores the integer part indirectly in the location pointed
to by iptr.
 DIAGNOSTICS
If ldexp would cause overflow, HUGE is returned
and errno is set to ERANGE.