\" $NetBSD: frexp.3,v 1.4 2015/09/10 12:30:08 wiz Exp $
\"
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\" the American National Standards Committee X3, on Information
\" Processing Systems.
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\" @(#)frexp.3 8.1 (Berkeley) 6/4/93
\"
Dd September 10, 2015
Dt FREXP 3
Os
Sh NAME
Nm frexp
Nd convert floating-point number to fractional and integral components
Sh LIBRARY
Lb libm
Sh SYNOPSIS
In math.h
Ft double
Fn frexp "double value" "int *exp"
Ft float
Fn frexpf "float value" "int *exp"
Ft long double
Fn frexpl "long double value" "int *exp"
Sh DESCRIPTION
The
Fn frexp
function breaks a floating-point number into a normalized
fraction and an integral power of 2.
It stores the integer in the
Em int
object pointed to by
Fa exp .
Sh RETURN VALUES
The
Fn frexp
function returns the value
Em x ,
such that
Em x
is a
Em double
with magnitude in the interval [1/2, 1) or zero, and
Fa value
equals
Em x
times 2 raised to the power
Fa *exp .
If
Fa value
is zero, both parts of the result are zero.
Sh SEE ALSO
Xr ldexp 3 ,
Xr math 3 ,
Xr modf 3
Sh STANDARDS
The
Fn frexp
function conforms to
St -ansiC .
