sl@0: /*
sl@0: * Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #include "wtlsdec.h"
sl@0: 
sl@0: //stolen from stdlib
sl@0: #define WTLS_UNIX_BASE   TTime(MAKE_TINT64(0x00dcddb3,0x0f2f8000))    // 00:00, Jan 1st 1970
sl@0: const TInt KTimeLength = 4;
sl@0: 
sl@0: 
sl@0: TWTLSDecVector::TWTLSDecVector(const TDesC8& aSource, TInt aMinLength, TInt aMaxLength)
sl@0: 	:iEncoding(aSource), iMinLength(aMinLength), iMaxLength(aMaxLength), iLengthOfContents(0), iLengthOfLength(0)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: void TWTLSDecVector::InitL()
sl@0: 	{
sl@0: 	if (iMaxLength <= 255)
sl@0: 		{
sl@0: 		iLengthOfLength = 1;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		if (iMaxLength <= 65535)
sl@0: 			{
sl@0: 			iLengthOfLength = 2;
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			if (iMaxLength <= 16777215)
sl@0: 				{
sl@0: 				iLengthOfLength = 3;
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				iLengthOfLength = 4;
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: 	if (iEncoding.Length() < (iLengthOfLength + iMinLength))
sl@0: 		{
sl@0: 		User::Leave(KErrArgument);
sl@0: 		}
sl@0: 	TWTLSDecUnsignedInteger decLength;
sl@0: 	TInt pos = 0;
sl@0: 	iLengthOfContents = decLength.DecodeShortL(iEncoding, pos, iLengthOfLength);
sl@0: 	if (iEncoding.Length() < (iLengthOfLength + iLengthOfContents))
sl@0: 		{
sl@0: 		User::Leave(KErrArgument);
sl@0: 		}
sl@0: 	}
sl@0: /*
sl@0: TPtrC8 TWTLSDecVector::Encoding() const
sl@0: 	{
sl@0: 	return iEncoding.Left(EncodingLength());
sl@0: 	}
sl@0: */
sl@0: TInt TWTLSDecVector::EncodingLength() const
sl@0: 	{
sl@0: 	return iLengthOfLength + iLengthOfContents;
sl@0: 	}
sl@0: /*	
sl@0: TPtrC8 TWTLSDecVector::Content() const
sl@0: 	{
sl@0: 	return iEncoding.Mid(iLengthOfLength, iLengthOfContents);
sl@0: 	}
sl@0: 
sl@0: TInt TWTLSDecVector::ContentLength() const
sl@0: 	{
sl@0: 	return iLengthOfContents;
sl@0: 	}
sl@0: 	
sl@0: TInt TWTLSDecVector::HeaderLength() const
sl@0: 	{
sl@0: 	return iLengthOfLength;
sl@0: 	}
sl@0: */
sl@0: TWTLSDecUnsignedInteger::TWTLSDecUnsignedInteger()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: TInt TWTLSDecUnsignedInteger::DecodeShortL(const TDesC8& aSource,TInt& aPos, TInt aLength)
sl@0: 	{
sl@0: 	if (aLength > 4)
sl@0: 		{
sl@0: 		User::Leave(KErrOverflow);
sl@0: 		}
sl@0: 	TInt sourceLength = aSource.Length();
sl@0: 	TInt res=0;
sl@0: 	while (aLength)
sl@0: 		{
sl@0: 		if (sourceLength <= aPos)
sl@0: 			{
sl@0: 			User::Leave(KErrArgument);
sl@0: 			}
sl@0: 		res<<=8;
sl@0: 		res+=aSource[aPos++];
sl@0: 		aLength--;
sl@0: 		}
sl@0: 	return res;
sl@0: 	}
sl@0: 
sl@0: RInteger TWTLSDecUnsignedInteger::DecodeLongL(const TDesC8& aSource,TInt& aPos, TInt aLength)
sl@0: 	{
sl@0: 	if (aSource.Length() < (aPos + aLength))
sl@0: 		{
sl@0: 		User::Leave(KErrArgument);
sl@0: 		}
sl@0: 	const TPtrC8 ptr = aSource.Mid(aPos, aLength);
sl@0: 	aPos += aLength;
sl@0: 	RInteger res = RInteger::NewL(ptr);
sl@0: 	return res;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TWTLSDecTime::TWTLSDecTime()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: TTime TWTLSDecTime::DecodeL(const TDesC8& aSource, TInt& aPos)
sl@0: 	{
sl@0: 	if ((aSource.Length() - aPos) < KTimeLength)
sl@0: 		{
sl@0: 		User::Leave(KErrArgument);
sl@0: 		}
sl@0: 	TWTLSDecUnsignedInteger decInt;
sl@0: 	TInt inc = decInt.DecodeShortL(aSource, aPos, 4);
sl@0: 	return WTLS_UNIX_BASE + TTimeIntervalSeconds(inc);
sl@0: 	}