livetrax/libs/appleutility/CoreAudio/PublicUtility/CACFNumber.cpp

/*
     File: CACFNumber.cpp
 Abstract: CACFNumber.h
  Version: 1.1

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*/
//=============================================================================
//	Includes
//=============================================================================

#include "CACFNumber.h"

//=============================================================================
//	CACFNumber
//=============================================================================

Float32	CACFNumber::GetFixed32() const
{
	SInt32 theFixedValue = GetSInt32();

	//	this is a 16.16 value so convert it to a float
	Float32 theSign = theFixedValue < 0 ? -1.0f : 1.0f;
	theFixedValue *= (SInt32)theSign;
	Float32 theWholePart = (theFixedValue & 0x7FFF0000) >> 16;
	Float32 theFractPart = theFixedValue & 0x0000FFFF;
	theFractPart /= 65536.0f;

	return theSign * (theWholePart + theFractPart);
}

Float64	CACFNumber::GetFixed64() const
{
	SInt64 theFixedValue = GetSInt64();

	//	this is a 32.32 value so convert it to a double
	Float64 theSign = theFixedValue < 0 ? -1.0 : 1.0;
	theFixedValue *= (SInt64)theSign;
	Float64 theWholePart = (theFixedValue & 0x7FFFFFFF00000000LL) >> 32;
	Float64 theFractPart = theFixedValue & 0x00000000FFFFFFFFLL;
	theFractPart /= 4294967296.0;

	return theSign * (theWholePart + theFractPart);
}