--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/networkprotocolmodules/common/utils/src/netpmutils.cpp	Fri Mar 12 15:50:23 2010 +0200
@@ -0,0 +1,129 @@
+// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// System
+// 
+//
+
+/**
+ @file
+ @internalTechnology
+ 
+*/
+
+#include <e32base.h>
+#include <e32math.h>
+
+// Component
+#include "netpmutils.h"
+
+/**
+Constants used in encoding of uncertainty data
+
+@see CSuplStart::Uncertainty()
+@see CSuplStart::UncertaintyAltitude()
+*/
+const TReal KLbsLogOnePointOne = 0.095310179804324860043952123280765;
+const TReal KLbsLogOnePointZeroTwoFive = 0.02469261259037150101430767543669;
+const TInt  KLbsMaxUncert = 127;
+
+/**
+ * TODO: update asn1 code to use this version and delete the CSuplMessageBase version?
+Uncertainty()
+
+Converts a minumum accuracy value in meters to an uncertainty value K as 
+described in 3GPP 23.032 (Universal Geographical Area Description) section 6.2.
+
+r = C((1+x)^K - 1)
+
+where r = distance in meters
+      C = 10
+      x = 0.1
+      K = uncertainty value
+      
+hence K = ln(r/C + 1) / ln(1.1)
+
+@param aDistance - distance measurement in meters
+@return uncertainty value K
+*/
+EXPORT_C TInt NetPmUtils::Uncertainty(const TReal32& aDistance)
+	{
+	TReal uncert;
+	Math::Ln(uncert,  (aDistance/10) + 1 );
+	uncert /= KLbsLogOnePointOne;
+	if (uncert>KLbsMaxUncert)
+		{
+		uncert = KLbsMaxUncert;
+		}
+
+	// round to nearest whole number
+	TReal uncertRounded;
+	Math::Round(uncertRounded, uncert, 0);
+	
+	return (TInt)uncertRounded;
+	}
+
+
+/**
+UncertaintyAltitude()
+
+Converts a minumum accuracy value in meters to an uncertainty altitude value K as 
+described in 3GPP 23.032 (Universal Geographical Area Description) section 6.4.
+
+r = C((1+x)^K - 1)
+
+where r = distance in meters
+      C = 45
+      x = 0.1
+      K = uncertainty value
+      
+hence K = ln(r/C + 1) / ln(1.1)
+
+@param aDistance - altitude accuracy in meters
+@return uncertainty altitude value K
+*/
+EXPORT_C TInt NetPmUtils::UncertaintyAltitude(const TReal32& aDistance)
+	{
+	
+	TReal uncert;
+	Math::Ln(uncert,  (aDistance/45) + 1 );
+	uncert /= KLbsLogOnePointZeroTwoFive;
+	if (uncert>KLbsMaxUncert)
+		{
+		uncert = KLbsMaxUncert;
+		}
+	// round to nearest whole number
+	TReal uncertRounded;
+	Math::Round(uncertRounded, uncert, 0);
+	
+	return (TInt)uncertRounded;
+	}
+
+/**
+EncodeAltitude()
+
+Converts an value for altiutude to an 15 bit binary coded number N
+
+@param aAltitude - altitude in meters
+@return uncertainty altitude value K
+*/
+EXPORT_C TInt NetPmUtils::EncodeAltitude(const TReal32& aAltitude)
+	{
+	TInt altEncoded = (TInt)aAltitude;
+	if (altEncoded>KLbsMaxAltitude)
+		{
+		altEncoded = KLbsMaxAltitude;
+		}
+
+	return altEncoded;
+	}