FREXP(3C)           UNIX Programmer's Manual            FREXP(3C)

NAME
     frexp, ldexp, modf - split into mantissa and exponent

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

     double ldexp (value, exp)
     double value;
     int exp;

     double modf (value, iptr)
     double value, *iptr;

HP-UX COMPATIBILITY
     Level:    HP-UX/RUN ONLY

     Origin:   System III

DESCRIPTION
     _F_r_e_x_p returns the mantissa of a double  _v_a_l_u_e  as  a  double
     quantity, _x, of magnitude less than 1, and stores an integer
     _n indirecly through _e_p_t_r, such that _v_a_l_u_e = _x * 2^_n.

     _L_d_e_x_p returns the quantity _v_a_l_u_e * 2^_e_x_p.  If this  quantity
     overflows,  then  a  positive  or  negative  huge  value  is
     returned, depending on the sign of _v_a_l_u_e, and _e_r_r_n_o  is  set
     to  ERANGE.   If this quantity underflows then 0 is returned
     and _e_r_r_n_o is set to ERANGE.

     _M_o_d_f returns the signed fractional part of _v_a_l_u_e and  stores
     the integer part indirectly through _i_p_t_r.