Provided by: manpages-pt-dev_20040726-2_all
infnan - deal with infinite or not-a-number (NaN) result
double infnan(int error);
The infnan() function returns a suitable value for infinity and "not-a-
number" (NaN) results. The value of error can be ERANGE to represent
infinity or anything else to represent NaN. errno is also set.
If error is ERANGE (Infinity), HUGE_VAL is returned.
If error is -ERANGE (-Infinity), -HUGE_VAL is returned.
If error is anything else, NAN is returned.
ERANGE The value of error is positive or negative infinity.
EDOM The value of error is "not-a-number" (NaN).