Re: [bug-gawk] Overflow to Infinity

[arnold]

Eli Zaretskii <address@hidden> wrote:

> This is non-portable.  On MS-Windows, the string you may get is
> "1.#IND", not "nan", depending on the version of the C runtime.  It
> can also have a leading sign, as in "-1.#IND".

Good to know.

Can MS-Windows also return nan/-nan ?

> Why do you need to sprintf the value, if it is known that it's a NaN?
> Why not do what you do with Inf:
>
> > +   } else if (isinf(val)) {
> > +           strcpy(buf, val < 0 ? "-inf" : "+inf");

Because you can't compare NaN to anything. The check `nan < 0' is false,
even for -nan.  :-(

Arnold