BcfConsts.h

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// Copyright (C) 2002-2022, Open Design Alliance (the "Alliance"). 
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//   
//   This application incorporates Open Design Alliance software pursuant to a license 
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//   Open Design Alliance Copyright (C) 2002-2022 by Open Design Alliance. 
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#ifndef _BCF_CONSTS_H
#define _BCF_CONSTS_H
 
#include "BcfCommon.h"
 
#define STL_USING_LIMITS
#include "OdaSTL.h"
 
namespace OdBcf
{
  namespace Consts
  {
    // This function should be tested on different platform. After successful tests we should move it to OdPlatfrom.h
    
    template<class RealType>
    inline RealType nanIEEERealCreate()
    {
      /*
      int inf = 0x7F800000;
      int nan = 0x7F800001;
      */
      union nanType
      {
        RealType nan;
        unsigned char buf[sizeof(RealType)];
      };
 
      nanType nanGenerator = { 0 };
 
#ifdef ODA_BIGENDIAN
      nanGenerator.buf[0] = 0x7F;
      nanGenerator.buf[1] = 0xF0;
      nanGenerator.buf[sizeof(RealType) - 1] = 0x1;
#else
      nanGenerator.buf[sizeof(RealType) - 1] = 0x7F;
      nanGenerator.buf[sizeof(RealType) - 2] = 0xF0;
      nanGenerator.buf[0] = 0x1;
#endif
 
      return nanGenerator.nan;
  }
 
#ifdef USE_LIB_NAN
  static const double OdNan = nan("");
  
  static const float OdNanf = nanf("");
#else
    static const double OdNan = nanIEEERealCreate<double>();
    
    static const float OdNanf = nanIEEERealCreate<float>();
#endif
 
    static const long OdLongUnset = std::numeric_limits<long>::max();
    
    static const int OdIntUnset = std::numeric_limits<int>::max();
    
    static const char OdStringUnset[] = "\xff";
    
    static const size_t OdStringUnsetLength = strlen(OdStringUnset);
 
    static const OdAnsiString AnsiStringUnset(OdBcf::Consts::OdStringUnset);
  }
}
 
#endif // _BCF_CONSTS_H