frexp, ldexp, modf - split into mantissa and exponent #include <u.h>

#include <libc.h>

double frexp(double value, int *eptr)

double ldexp(double value, int exp)

double modf(double value, double *iptr)

Frexp returns the mantissa of value and stores the exponent indirectly through eptr , so that value =

Ldexp returns the quantity

Modf returns the signed fractional part of value and stores the integer part indirectly through iptr .

/sys/src/libc/port/frexp.c intro (2) Ldexp returns 0 for underflow and the appropriately signed infinity for overflow.