Re: POSIX and float rounding

[Denis Ovsienko <denis () ovsienko info>]

On Thu, 19 Mar 2026 12:13:29 -0700
Guy Harris <gharris () sonic net> wrote:

> In any case, given all this mishegoss, the right answer is probably
> to have the script see how the floating-point value 0.5 is printed
> with %.0f, and choose which test to perform based on that, in the
> hopes that whatever rounding the scripting program does matches what
> tcpdump will do.

Thank you for the detailed analysis.  Are you saying that fesetround()
cannot solve this problem reliably?

The simplest workaround would be to fork the test into one QNX-only
version and another except-QNX version (assuming QNX does not change its
rounding method).

-- 
    Denis Ovsienko
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