[rrd-users] Re: NaN representation on win32

[jonathan sartin]

Okay, so this was a dumb question ;-)

I guess it's all in the IEEE math representation and how printf deals with
this on any given platform. The compiler does the math correctly, it just
represents a quiet NaN in a different way to gcc. Changed the code that used
it (cricket) to recognise -1.#INF as nan and problem went away.

----- Original Message ----- 
From: "Eastbarn" <eastbarn at nildram.co.uk>
To: <rrd-users at list.ee.ethz.ch>
Sent: Monday, July 19, 2004 5:08 PM
Subject: [rrd-users] NaN representation on win32


All,

hope someone can help me with a win32 newbie question. Alternatively send me
across to the developer mailing list if I'm in the wrong place ;-)

I've compiled a snapshot version of 1.1 on win32 using VC6 (w2k, activestate
perl 5.8) . The representation that I'm seeing for NaN is rather different
to my previous experience (Solaris/Linux). I'm seeing NaN represented as
"-1.#IND" (the float representation for quiet NaN), rather than the usual
NaN by the perl shared bindings. This is causing me a few problems further
down the line.

Can anyone point me in the right direction - math never was my best subject.

Thanks in advance .... Jonathan



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