frexp(3) [freebsd man page]

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

NAME

     frexp, frexpf, frexpl -- convert floating-point number to fractional and integral components

LIBRARY

     Math Library (libm, -lm)

SYNOPSIS

     #include <math.h>

     double
     frexp(double value, int *exp);

     float
     frexpf(float value, int *exp);

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

DESCRIPTION

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

RETURN VALUES

     These functions return the value x, such that x is a double with magnitude in the interval [1/2, 1) or zero, and value equals x times 2
     raised to the power *exp.	If value is zero, both parts of the result are zero.

SEE ALSO

     ldexp(3), math(3), modf(3)

STANDARDS

     The frexp(), frexpf(), and frexpl() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

BSD
								   March 4, 2005							       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)