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// Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// Implements utility classes private to the GSMU dll
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//
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//
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/**
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@file
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*/
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#include "gsmupriv.h"
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#include "Gsmumain.h"
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#include <exterror.h>
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//
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// TSmsPacker - packs and unpacks data encoded in an SMS alphabet
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//
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/**
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* Constructor
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*/
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TSmsAlphabetPacker::TSmsAlphabetPacker(TSmsDataCodingScheme::TSmsAlphabet aAlphabet,TBool aIsBinary,TInt aStartBit)
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: iAlphabet(aAlphabet),iIsBinary(aIsBinary),iStartBit(aStartBit)
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{
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// NOP
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} // TSmsAlphabetPacker::TSmsAlphabetPacker
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/**
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* Packs user data units from aIn and appends to aOut.
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*/
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TInt TSmsAlphabetPacker::PackL(TDes8& aOut,const TDesC8& aIn)
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{
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LOGGSMU1("TSmsAlphabetPacker::PackL()");
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// Ensure we've got the right length
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TInt packedOctetsRequired=PackedOctetsRequiredL(aIn.Length());
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if (packedOctetsRequired>(aOut.MaxLength()-aOut.Length()))
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User::Leave(KErrOverflow);
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// Do the conversion
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TInt elementSizeInBits=ElementSizeInBitsL();
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if (elementSizeInBits==8)
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{
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// Straight copy here
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aOut.Append(aIn);
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}
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else if (elementSizeInBits==7)
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{
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// Get raw pointers and do packing
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TUint8* outPtr=(TUint8*)aOut.Ptr()+aOut.Length();
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const TUint8* inPtr=aIn.Ptr();
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outPtr[0]=0;
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for (TInt i=0; i<aIn.Length(); i++)
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{
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TUint8 to=inPtr[i];
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*outPtr|=(to<<iStartBit);
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if (iStartBit)
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{
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outPtr++;
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*outPtr=(TUint8) (to>>(8-iStartBit));
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}
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iStartBit=(iStartBit+7)%8;
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}
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// Increment the length for the packed data
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aOut.SetLength(aOut.Length()+packedOctetsRequired);
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}
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else
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{
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__ASSERT_DEBUG(EFalse,Panic(KGsmuPanicPackAlphabetInvalid));
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}
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// Return number of bytes used
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return packedOctetsRequired;
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} // TSmsAlphabetPacker::PackL
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/**
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* Unpacks user data units from aIn and appends to aOut.
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*/
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TInt TSmsAlphabetPacker::UnpackL(const TDesC8& aIn,TDes8& aOut,TInt aNumUDUnits)
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{
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LOGGSMU1("TSmsAlphabetPacker::UnpackL()");
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TInt length=aNumUDUnits;
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// Ensure we've got enough input and output buffer
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// defect fix for
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// EDNOPMA-4YPJ34 Short message with alphanumeric address in From field is not received
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// aIn.length is constant (KSmsAddressMaxAddressValueLength = 10)
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// PackedOctetsRequiredL is dependant on aNumUDUnits
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// otheriwse if a short alphanumeric address is received GSMU leaves
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// and the smsprot returns protocol error to the service center
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// if (PackedOctetsRequiredL(aIn.Length())>aNumUDUnits)
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if (PackedOctetsRequiredL(aNumUDUnits)>aIn.Length())
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User::Leave(KErrCorrupt);
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if (aOut.Length()+length>aOut.MaxLength())
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User::Leave(KErrCorrupt);
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TInt elementSizeInBits=ElementSizeInBitsL();
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if (elementSizeInBits==8)
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{
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aOut.Append(aIn);
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}
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else if (elementSizeInBits==7)
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{
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// Get raw pointers and do packing
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TUint8* outPtr=(TUint8*)aOut.Ptr()+aOut.Length();
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const TUint8* inPtr=aIn.Ptr();
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for (TInt i=0; i<length; i++)
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{
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TInt from=(*inPtr>>iStartBit) & 0x7F;
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if (iStartBit)
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{
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inPtr++;
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from|=(*inPtr<<(8-iStartBit)) & 0x7F;
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}
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outPtr[i]=(TUint8) from;
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iStartBit=(iStartBit+7)%8;
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}
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aOut.SetLength(aOut.Length()+length);
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}
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else
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{
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__ASSERT_DEBUG(EFalse,Panic(KGsmuPanicPackAlphabetInvalid));
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}
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return length;
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} // TSmsAlphabetPacker::UnpackL
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/**
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* Converts then packs the input data, aIn, and appends to aOut
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*/
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TInt TSmsAlphabetPacker::ConvertAndPackL(CCnvCharacterSetConverter& aCharacterSetConverter,RFs& aFs,TDes8& aOut,const TDesC& aIn,TInt& aConvertedNumUDUnits)
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{
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LOGGSMU1("TSmsAlphabetPacker::ConvertAndPackL()");
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// Do the conversion
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// VEP Fix for defect EXT-568BMW, when length of alphanumeric destination address
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// was set wrong and also special characters defined in 7-bit default aplhabet (ä,ö...)
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// were converted incorrectly
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CSmsAlphabetConverter* converter=CSmsAlphabetConverter::NewLC(aCharacterSetConverter,aFs,iAlphabet,iIsBinary);
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TPtrC8 convertedPtr=converter->ConvertFromNativeL(aIn);
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aConvertedNumUDUnits=convertedPtr.Length();
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// Do the packing
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TInt octetsUsed=PackL(aOut,convertedPtr);
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// Cleanup and return
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CleanupStack::PopAndDestroy(converter);
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return octetsUsed;
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} // TSmsAlphabetPacker::ConvertAndPackL
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/**
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* Unpacks the converts the input data, aIn, and appends to aOut
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*/
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TInt TSmsAlphabetPacker::UnpackAndConvertL(CCnvCharacterSetConverter& aCharacterSetConverter,RFs& aFs,const TDesC8& aIn,TDes& aOut,TInt aNumUDUnits)
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{
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LOGGSMU1("TSmsAlphabetPacker::UnpackAndConvertL()");
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// Unpack first
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HBufC8* unpackedBuffer=HBufC8::NewLC(aNumUDUnits);
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TPtr8 unpackedBufferPtr(unpackedBuffer->Des());
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UnpackL(aIn,unpackedBufferPtr,aNumUDUnits);
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// Convert
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CSmsAlphabetConverter* converter=CSmsAlphabetConverter::NewLC(aCharacterSetConverter,aFs,iAlphabet,iIsBinary);
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TPtrC convertedPtr=converter->ConvertToNativeL(*unpackedBuffer);
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if (convertedPtr.Length()>(aOut.MaxLength()-aOut.Length()))
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User::Leave(KErrCorrupt);
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// Cleanup and return
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aOut.Append(convertedPtr);
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CleanupStack::PopAndDestroy(2); // unpackedBuffer,converter
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return aNumUDUnits;
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} // TSmsAlphabetPacker::UnpackAndConvertL
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/**
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* Returns the number of octets needed to pack the specified number of
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*/
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TInt TSmsAlphabetPacker::PackedOctetsRequiredL(TInt aNumUDUnits) const
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{
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LOGGSMU1("TSmsAlphabetPacker::PackedOctetsRequiredL()");
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TInt octetsRequired=0;
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TInt elementSizeInBits=ElementSizeInBitsL();
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if (elementSizeInBits==8)
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octetsRequired=aNumUDUnits;
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else
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octetsRequired=(iStartBit+aNumUDUnits*elementSizeInBits + 7)/8; // Rounds up
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return octetsRequired;
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} // TSmsAlphabetPacker::PackedOctetsRequiredL
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/**
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* Returns the number of UD units that are packed in the specified number of octets
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*/
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TInt TSmsAlphabetPacker::NumUDUnitsL(TInt aOctets) const
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{
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TInt numUD=0;
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TInt elementSizeInBits=ElementSizeInBitsL();
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if (elementSizeInBits==8)
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numUD=aOctets;
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else
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numUD=(8*aOctets - iStartBit)/elementSizeInBits;
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return numUD;
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}
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/**
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* Returns the size in bits of a UDL element for the alphabet. Leaves if
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* invalid data coding scheme.
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*/
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TInt TSmsAlphabetPacker::ElementSizeInBitsL() const
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{
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LOGGSMU1("TSmsAlphabetPacker::ElementSizeInBitsL()");
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TInt ret = 8;
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if (iIsBinary)
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return ret;
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switch (iAlphabet)
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{
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case TSmsDataCodingScheme::ESmsAlphabet7Bit:
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{
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ret = 7;
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break;
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}
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case TSmsDataCodingScheme::ESmsAlphabet8Bit:
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case TSmsDataCodingScheme::ESmsAlphabetUCS2:
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{
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ret = 8;
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break;
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}
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default:
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{
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User::Leave(KErrGsmSMSDataCodingSchemeNotSupported);
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}
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}
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return ret;
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} // TSmsAlphabetPacker::ElementSizeInBitsL
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