NAME

frexp, ldexp, modf − split into mantissa and exponent

SYNOPSIS

double frexp(double value, int ∗eptr)

double ldexp(double value, int exp)

double modf(double value, double ∗iptr)

DESCRIPTION

­Frexp returns the mantissa of ­value and stores the exponent indirectly through ­eptr, so that ­value = frexp(value)×2∗eptr

­Ldexp returns the quantity value×2exp.

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

DIAGNOSTICS

­Ldexp returns 0 for underflow and the appropriately signed infinity for overflow. 

SEE ALSO

intro(2)

Plan 9  —  January 03, 1993