frexp(3) - NetBSD Manual Pages

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FREXP(3)                NetBSD Library Functions Manual               FREXP(3)


NAME

     frexp -- convert floating-point number to fractional and integral compo-
     nents


LIBRARY

     Math Library (libm, -lm)


SYNOPSIS

     #include <math.h>

     double
     frexp(double value, int *exp);

     float
     frexpf(float 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.


RETURN VALUES

     The frexp() function returns 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() function conforms to ANSI X3.159-1989 (``ANSI C89'').

NetBSD 7.1.1                    March 21, 2006                    NetBSD 7.1.1