--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/filehandling/fileconverterfw/SRC/BASE64.CPP	Tue Feb 02 10:12:00 2010 +0200
@@ -0,0 +1,196 @@
+// Copyright (c) 1997-2009 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:
+//
+
+#include <e32base.h>
+#include <e32def.h>
+
+#include "BASE64.H"
+#include "BASE64DF.H"
+
+//
+// class CBase64CodecBase
+// 
+// Provides 3 octet encoding and decoding alone
+// Returns an error code in the case of invalid source
+//
+
+void CBase64CodecBase::Reset()
+//
+// Reset the internal buffer
+	{
+	for (TInt i = 0; i < 4; i++)
+		iQuart[i] = NULL;
+	iQuartCount = 0;
+	}
+
+
+TInt CBase64CodecBase::Encode(const TDesC8& aSource, TDes8& aResult) const
+//
+// Encode an arbitrary number of octets in aSource append the output to aResult.
+// If the number of octets in aSource is not a multiple of 3
+// padding will be added terminating the encoding
+//
+	{
+	TInt sourceLength = aSource.Length();
+	if (sourceLength == 0)
+		return KErrNone;
+	__ASSERT_ALWAYS(((sourceLength * 4)/3 + sourceLength%3) <= (aResult.MaxLength()-aResult.Length()), Panic(EBase64Overflow));
+
+	sourceLength -= sourceLength%3;
+	TUint8 sixBit=NULL;
+	TText8 source;
+	TInt i;
+
+	for (i = 0; i < sourceLength; i++)
+		{
+		source=aSource[i];
+		sixBit = STATIC_CAST(TUint8,(source & 0xFC) >> 2);
+		aResult.Append(KBase64Alphabet[sixBit]);
+		sixBit = NULL;
+		sixBit = STATIC_CAST(TUint8,(source & 0x03) << 4);
+		source=aSource[++i];
+		sixBit |= STATIC_CAST(TUint8,(source & 0xF0) >> 4);
+		aResult.Append(KBase64Alphabet[sixBit]);
+		sixBit = NULL;
+		sixBit = STATIC_CAST(TUint8,(source & 0x0F) << 2);
+		source=aSource[++i];
+		sixBit |= STATIC_CAST(TUint8,(source & 0xC0) >> 6);
+		aResult.Append(KBase64Alphabet[sixBit]);
+		sixBit = NULL;
+		sixBit = STATIC_CAST(TUint8,(source & 0x3F));
+		aResult.Append(KBase64Alphabet[sixBit]);
+		}
+	switch (aSource.Length() % 3)
+		{
+	case 2:
+		source=aSource[i];
+		sixBit = STATIC_CAST(TUint8,(source & 0xFC) >> 2);
+		aResult.Append(KBase64Alphabet[sixBit]);
+		sixBit = NULL;
+		sixBit = STATIC_CAST(TUint8,(source & 0x03) << 4);
+		source=aSource[++i];
+		sixBit |= STATIC_CAST(TUint8,(source & 0xF0) >> 4);
+		aResult.Append(KBase64Alphabet[sixBit]);
+		sixBit = NULL;
+		sixBit = STATIC_CAST(TUint8,(source & 0x0F) << 2);
+		aResult.Append(KBase64Alphabet[sixBit]);
+		aResult.Append(KBase64Alphabet[KBase64Pad]);
+		break;
+	case 1:
+		source=aSource[i];
+		sixBit = STATIC_CAST(TUint8,(source & 0xFC) >> 2);
+		aResult.Append(KBase64Alphabet[sixBit]);
+		sixBit = NULL;
+		sixBit = STATIC_CAST(TUint8,(source & 0x03) << 4);
+		aResult.Append(KBase64Alphabet[sixBit]);
+		aResult.Append(KBase64Alphabet[KBase64Pad]);
+		aResult.Append(KBase64Alphabet[KBase64Pad]);
+		break;
+	default:
+		break;
+		}
+	return KErrNone;
+	}
+
+TInt CBase64CodecBase::Decode(const TDesC8& aSource, TDes8& aResult)
+//
+// Decode the base64 stream in aSource append the output to aResult.
+// Any non base64 chars are discarded while decoding
+// Returns if either an end of stream is found, or all aSource is exhausted
+// 
+// Octets are only decoded when complete
+// 
+	{
+	__ASSERT_ALWAYS((aSource.Length() * 3)/4 <= (aResult.MaxLength() - aResult.Length()), Panic(EBase64Overflow));
+	if (aSource.Length() == 0)
+		return KErrNone;
+	TText8* readPtr=CONST_CAST(TText8*,aSource.Ptr());
+	TText8* writePtr=CONST_CAST(TText8*,aResult.Ptr());
+	TText8* writeStart=writePtr;
+	writePtr += aResult.Length();
+	TText8 result;
+	TText8* readEnd=(readPtr + aSource.Length());
+
+	for (; readPtr < readEnd; readPtr++)
+		{
+		TUint8 base64code = Base64Char(*readPtr);
+		switch (base64code)
+			{
+		case KBase64Pad:
+			if (iQuartCount == 0)
+				return KErrNone;
+			result = STATIC_CAST(TText8,iQuart[0] << 2);
+			result |= STATIC_CAST(TText8,((iQuart[1] & 0x30) >> 4));
+			*writePtr=result;
+			writePtr++;
+			if (iQuartCount == 3)
+				{
+				result = STATIC_CAST(TText8,(iQuart[1] & 0x0F) << 4);
+				result |= STATIC_CAST(TText8,((iQuart[2] & 0x3C) >> 2));
+				*writePtr=result;
+				writePtr++;
+				}
+			aResult.SetLength(writePtr-writeStart);	
+			iQuartCount = 0;
+			return KErrNone;
+		case KErrInvalidCharacter:
+			// Do nothing
+			break;
+		default:
+			{
+			iQuart[iQuartCount++] = base64code;
+			if (iQuartCount == 4)
+				{
+				result = STATIC_CAST(TText8,iQuart[0] << 2);
+				result |= STATIC_CAST(TText8,((iQuart[1] & 0x30) >> 4));
+				*writePtr=result;
+				writePtr++;
+				result = STATIC_CAST(TText8,(iQuart[1] & 0x0F) << 4);
+				result |= STATIC_CAST(TText8,((iQuart[2] & 0x3C) >> 2));
+				*writePtr=result;
+				writePtr++;
+				result = STATIC_CAST(TText8,((iQuart[2] & 0x03) << 6));
+				result |= STATIC_CAST(TText8,iQuart[3]);
+				*writePtr=result;
+				writePtr++;
+				iQuartCount = 0;
+				}
+			}
+			}
+		}
+	aResult.SetLength(writePtr-writeStart);
+	return KErrNone;
+	}
+
+TUint8 CBase64CodecBase::Base64Char(TText8 aChar) const
+//
+// Return the code or KErrInvalidCharacter
+	{
+	for (TUint8 i = 0; i < 65; i++)
+		{
+		if (aChar == KBase64Alphabet[i])
+			return i;
+		}
+	return KErrInvalidCharacter;
+	}
+
+
+GLDEF_C void Panic(TBase64Panic aPanic)
+// Panic the process with Base64 codec as the category.
+//
+	{
+	_LIT(KPanicBase64Codec,"Base64 codec");
+	User::Panic(KPanicBase64Codec,aPanic);
+	}