[geos-devel] NaN

[Todd Vollmer]

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.

Todd V.

-----Original Message-----
From: Paul Ramsey [mailto:pramsey at refractions.net]
Sent: Monday, August 18, 2003 7:33 PM
To: GEOS Development List
Subject: [geos-devel] NaN


What is this about? Doesn't C++ have some standards for representing 
NaN, Inf, and -Inf?
Paul

  #ifndef GEOS_PLATFORM_H
  #define GEOS_PLATFORM_H
  //Defines NaN for intel platforms
  #define DoubleNotANumber 1.7e-308

  //Don't forget to define infinities
  #define DoubleInfinity 1.7e+308
  #define DoubleNegInfinity -1.7e+308

  #endif

-- 
       __
      /
      | Paul Ramsey
      | Refractions Research
      | Email: pramsey at refractions.net
      | Phone: (250) 885-0632
      \_



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