--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symport/e32/euser/maths/um_mod.cpp	Thu Jun 25 15:59:54 2009 +0100
@@ -0,0 +1,122 @@
+// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Symbian Foundation License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.symbianfoundation.org/legal/sfl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// e32\euser\maths\um_mod.cpp
+// Writes the remainder of aSrc/aModulus to aTrg
+// 
+//
+
+#include "um_std.h"
+
+#if defined(__USE_VFP_MATH) && !defined(__CPU_HAS_VFP)
+#error	__USE_VFP_MATH was defined but not __CPU_HAS_VFP - impossible combination, check variant.mmh 
+#endif
+
+#ifndef __USE_VFP_MATH
+
+EXPORT_C TInt Math::Mod(TReal &aTrg,const TReal &aSrc,const TReal &aModulus)
+/**
+Calculates the modulo remainder.
+
+This is the value of p mod q, the modulo remainder when dividing p by q.
+The result is given by p - q int (p/q):
+it has the same sign as p:
+thus, 5 mod 3 = 2, -5 mod 3 = -2.
+No error is raised if non-integer arguments are passed.
+
+@param aTrg      A reference containing the result.
+@param aSrc      The p argument to the mod function.
+@param aModulus  The q argument to the mod function.
+
+@return KErrNone if successful, otherwise another of
+        the system-wide error codes. 
+*/
+//
+// Floating point modulo arithmetic.
+//
+	{
+
+	TRealX f1,f2;
+	TInt r=f1.Set(aSrc);
+	if (r!=KErrNone)
+		{
+		SetNaN(aTrg);
+		return KErrArgument;
+		}
+	r=f2.Set(aModulus);
+	if (r==KErrArgument || f2.IsZero())
+		{
+		SetNaN(aTrg);
+		return KErrArgument;
+		}
+	if (r==KErrOverflow)
+		{
+		aTrg=aSrc;
+		return KErrNone;
+		}
+	if ((TInt(f1.iExp)-TInt(f2.iExp))>KMantissaBits)
+		{
+		SetZero(aTrg);
+		return KErrTotalLossOfPrecision;
+		}
+	f1.ModEq(f2);
+	return f1.GetTReal(aTrg);
+	}
+
+#else // __USE_VFP_MATH
+
+// definitions come from RVCT math library
+extern "C" TReal fmod(TReal,TReal);
+
+EXPORT_C TInt Math::Mod(TReal& aTrg, const TReal& aSrc, const TReal &aModulus)
+	{
+	SReal64 *pSrc=(SReal64 *)&aSrc;
+	SReal64 *pModulus=(SReal64 *)&aModulus;
+	
+	if (pSrc->exp==0 || pModulus->exp==0 || pSrc->exp==KSpecialExponent || pModulus->exp==KSpecialExponent)
+		{
+		TRealX f1,f2;
+		TInt r=f1.Set(aSrc);
+		if (r!=KErrNone)
+			{
+			SetNaN(aTrg);
+			return KErrArgument;
+			}
+		r=f2.Set(aModulus);
+		if (r==KErrArgument || f2.IsZero())
+			{
+			SetNaN(aTrg);
+			return KErrArgument;
+			}
+		if (r==KErrOverflow)
+			{
+			aTrg=aSrc;
+			return KErrNone;
+			}
+		if ((TInt(f1.iExp)-TInt(f2.iExp))>KMantissaBits)
+			{
+			SetZero(aTrg);
+			return KErrTotalLossOfPrecision;
+			}
+		}
+	else if ((pSrc->exp - pModulus->exp) > KMantissaBits)
+		{
+		SetZero(aTrg);
+		return KErrTotalLossOfPrecision;
+		}
+
+	aTrg = fmod(aSrc,aModulus);
+	return KErrNone;
+	}
+
+#endif