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<TITLE>RE: [geos-devel] NaN</TITLE>
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<P><FONT SIZE=2>I don't believe that C++ has a standard for any that you mention. It is machine dependant. NAN is a IEEE standard. Take a look in the math.h for NAN references.</FONT></P>
<P><FONT SIZE=2>Todd V.</FONT>
</P>
<P><FONT SIZE=2>-----Original Message-----</FONT>
<BR><FONT SIZE=2>From: Paul Ramsey [<A HREF="mailto:pramsey@refractions.net">mailto:pramsey@refractions.net</A>]</FONT>
<BR><FONT SIZE=2>Sent: Monday, August 18, 2003 7:33 PM</FONT>
<BR><FONT SIZE=2>To: GEOS Development List</FONT>
<BR><FONT SIZE=2>Subject: [geos-devel] NaN</FONT>
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<P><FONT SIZE=2>What is this about? Doesn't C++ have some standards for representing </FONT>
<BR><FONT SIZE=2>NaN, Inf, and -Inf?</FONT>
<BR><FONT SIZE=2>Paul</FONT>
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<P><FONT SIZE=2> #ifndef GEOS_PLATFORM_H</FONT>
<BR><FONT SIZE=2> #define GEOS_PLATFORM_H</FONT>
<BR><FONT SIZE=2> //Defines NaN for intel platforms</FONT>
<BR><FONT SIZE=2> #define DoubleNotANumber 1.7e-308</FONT>
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<P><FONT SIZE=2> //Don't forget to define infinities</FONT>
<BR><FONT SIZE=2> #define DoubleInfinity 1.7e+308</FONT>
<BR><FONT SIZE=2> #define DoubleNegInfinity -1.7e+308</FONT>
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<P><FONT SIZE=2> #endif</FONT>
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<P><FONT SIZE=2>-- </FONT>
<BR><FONT SIZE=2> __</FONT>
<BR><FONT SIZE=2> /</FONT>
<BR><FONT SIZE=2> | Paul Ramsey</FONT>
<BR><FONT SIZE=2> | Refractions Research</FONT>
<BR><FONT SIZE=2> | Email: pramsey@refractions.net</FONT>
<BR><FONT SIZE=2> | Phone: (250) 885-0632</FONT>
<BR><FONT SIZE=2> \_</FONT>
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