cvs commit: xml-xalan/c/src/PlatformSupport DoubleSupport.cpp DoubleSupport.hpp

[db...@apache.org]

dbertoni    01/02/01 10:31:27

  Modified:    c/src/PlatformSupport DoubleSupport.cpp DoubleSupport.hpp
  Log:
  Moved rounding function from XPath/FunctionRound to here.
  
  Revision  Changes    Path
  1.19      +45 -0     xml-xalan/c/src/PlatformSupport/DoubleSupport.cpp
  
  Index: DoubleSupport.cpp
  ===================================================================
  RCS file: /home/cvs/xml-xalan/c/src/PlatformSupport/DoubleSupport.cpp,v
  retrieving revision 1.18
  retrieving revision 1.19
  diff -u -r1.18 -r1.19
  --- DoubleSupport.cpp	2001/01/16 02:42:13	1.18
  +++ DoubleSupport.cpp	2001/02/01 18:31:25	1.19
  @@ -883,3 +883,48 @@
   }
   
   #endif
  +
  +
  +double
  +DoubleSupport::round(double		theValue)
  +{
  +	if (isNaN(theValue))
  +	{
  +		return getNaN();
  +	}
  +	else if (isPositiveInfinity(theValue))
  +	{
  +		return getPositiveInfinity();
  +	}
  +	if (isNegativeInfinity(theValue))
  +	{
  +		return getNegativeInfinity();
  +	}
  +	else if (theValue == 0)
  +	{
  +		return 0.0;
  +	}
  +	else if (theValue > 0)
  +	{
  +		return long(theValue + 0.5);
  +	}
  +	else
  +	{
  +		// Negative numbers are a special case.  Any time we
  +		// have -0.5 as the fractional part, we have to
  +		// round up (toward 0), rather than down.
  +		double			intPart = 0;
  +
  +		const double	fracPart = modf(theValue, &intPart);
  +
  +		if (fracPart == -0.5)
  +		{
  +			// special case -- we have have to round toward 0...
  +			return long(theValue + 0.5);
  +		}
  +		else
  +		{
  +			return long(theValue - 0.5);
  +		}
  +	}
  +}
  
  
  
  1.11      +10 -0     xml-xalan/c/src/PlatformSupport/DoubleSupport.hpp
  
  Index: DoubleSupport.hpp
  ===================================================================
  RCS file: /home/cvs/xml-xalan/c/src/PlatformSupport/DoubleSupport.hpp,v
  retrieving revision 1.10
  retrieving revision 1.11
  diff -u -r1.10 -r1.11
  --- DoubleSupport.hpp	2001/01/16 02:42:13	1.10
  +++ DoubleSupport.hpp	2001/02/01 18:31:26	1.11
  @@ -593,6 +593,16 @@
   	static double
   	toDouble(const XalanDOMChar*	theString);
   
  +	/**
  +	 * Round a number according to the XPath
  +	 * rules.
  +	 *
  +	 * @param theValue The value to round.
  +	 * @return The result of the rounding
  +	 */
  +	static double
  +	round(double	theValue);
  +
   private:
   
   	static const double				s_NaN;