__isnanl
Name
__isnanl -- test for infinity
Synopsis
int __isnanl(long
double
arg
);
Description
__isnanl has the same
specification as isnan in the
Single UNIX Specification, Version 3,
except that the argument type for
__isnanl is known to be long
double.
__isnanl is not in the source
standard; it is only in the binary standard.