frexp(3) [osx man page]

FREXP(3)						   BSD Library Functions Manual 						  FREXP(3)

NAME

     frexp -- break floating-point number into normalized fraction and power of 2

SYNOPSIS

     #include <math.h>

     double
     frexp(double value, int *exp);

     long double
     frexpl(long double value, int *exp);

     float
     frexpf(float value, int *exp);

DESCRIPTION

     The frexp() functions break the floating-point number value into a normalized fraction and an integral power of 2. They store the integer in
     the int object pointed to by exp.

     The functions return a number x such that x has a magnitude in the interval [1/2, 1) or 0, and value = x*(2**exp).

SPECIAL VALUES

     frexp(+-0, exp) returns +-0, and stores 0 in the object pointed to by exp.

     frexp(+-infinity, exp) returns +-infinity, and stores an unspecified value in the object pointed to by exp.

     frexp(Nan, exp) returns a Nan, and stores an unspecified value in the object pointed to by exp.

SEE ALSO

     math(3), scalbn

STANDARDS

     The frexp() functions conform to ISO/IEC 9899:2011.

BSD
								 December 11, 2006							       BSD

frexp(3M)						  Mathematical Library Functions						 frexp(3M)

NAME

       frexp, frexpf, frexpl - extract mantissa and exponent from a floating-point number

SYNOPSIS

       cc [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double frexp(double num, int *exp);

       float frexpf(float num, int *exp);

       long double frexpl(long double num, int *exp);

DESCRIPTION

       These functions break a floating-point number into a normalized fraction and an integral power of 2. They store the integer exponent in the
       int object pointed to by exp.

RETURN VALUES

       For finite arguments, these functions return the value x, such that x is a double with magnitude in the interval [1/2, 1)  or  0,  and  num
       equals x times 2 raised to the power *exp.

       If num is NaN, NaN is returned and the value of *exp is unspecified.

       If num is +- 0, +- 0 is returned and the value of *exp is 0.

       If num is +-Inf, num is returned and the value of *exp is unspecified.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       isnan(3M), ldexp(3M), modf(3M), attributes(5), standards(5)

SunOS 5.10							    16 Aug 2004 							 frexp(3M)