FREXP(3) OpenBSD Programmer's Manual FREXP(3)NAME
frexp, frexpf, frexpl - convert floating-point number to fractional and
integral components
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() function breaks a floating-point number into a normalized
fraction and an integral power of 2. It stores the integer in the int
object pointed to by exp. The frexpf() function is a single precision
version of frexp(). The frexpl() function is an extended precision
version of frexp().
RETURN VALUES
The frexp(), frexpf() and frexpl() 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 ALSOldexp(3), math(3), modf(3)STANDARDS
The frexp() function conforms to ANSI X3.159-1989 (``ANSI C'').
OpenBSD 4.9 December 12, 2008 OpenBSD 4.9