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FREXP(3) FreeBSD 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").
FreeBSD 14.0-RELEASE-p6 March 4, 2005 FreeBSD 14.0-RELEASE-p6