/*+
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* Copyright (c) 2005 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:  Collection of string parsing methods.+
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*+
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*/+
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+
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+
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#include "caistrparser.h"+
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#include "aistrcnv.h"+
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+
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// CONSTANTS+
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+
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const TInt KThreeOctets = 3;+
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const TInt KTwoOctets = 2;+
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+
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namespace+
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    {+
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    +
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    _LIT8( KHexPrefix8, "0x" );+
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    _LIT16( KHexPrefix16, "0x" );+
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    +
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    const TInt KMaxOneOctetValue = 0x007F;+
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    const TInt KMaxTwoOctetValue = 0x07FF;+
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    +
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    TInt Utf8OctetCount( const TDesC16& aString )+
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    	{+
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        TInt numOctets(0);+
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        TInt length(aString.Length());+
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        const TUint16* stringData = aString.Ptr();+
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            +
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       	for ( TInt i = 0; i < length; ++i)+
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        	{+
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            if (stringData[i] > KMaxOneOctetValue)+
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            	{+
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                if (stringData[i] > KMaxTwoOctetValue)+
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                	{+
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                    numOctets += KThreeOctets;+
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                    }+
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               	else+
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                    {+
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                    numOctets += KTwoOctets;+
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                    }+
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                }+
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           	else+
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               	{+
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                ++numOctets;+
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                }+
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            }+
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                +
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      	return numOctets;+
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       	}+
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    +
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    TPtr8 EnsureBufMaxLengthL(HBufC8*& aBuffer, TInt aMaxLength )+
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        {+
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        if ( !aBuffer )+
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            {+
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            aBuffer = HBufC8::NewL( aMaxLength );+
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            }+
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        else if ( aBuffer->Des().MaxLength() < aMaxLength )+
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            {+
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            aBuffer = aBuffer->ReAllocL( aMaxLength );+
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            }+
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            +
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        return aBuffer->Des();+
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        }+
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    +
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    }+
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+
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namespace AiUtility+
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    {+
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    +
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template< class DescType, class LexType > inline+
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TInt ParseIntImpl+
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        ( TInt32& aValue, const DescType& aStringValue, +
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        const DescType& aHexPrefix )+
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    {+
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    const TInt pos = aStringValue.FindF( aHexPrefix );+
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    if (pos != KErrNotFound)+
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        {+
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        LexType lex( aStringValue.Mid( pos + aHexPrefix.Length() ) );+
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        // Hex parsing needs unsigned int+
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        TUint32 value = 0;+
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        const TInt parseResult = lex.Val( value, EHex );+
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        if ( parseResult == KErrNone )+
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            {+
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            aValue = value;+
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            }+
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        return parseResult;+
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        }+
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    else+
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        {+
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        LexType lex( aStringValue );+
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        return lex.Val(aValue);+
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        }+
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    }+
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+
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EXPORT_C TInt ParseInt( TInt32& aResult, const TDesC8& aSourceString )+
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    {+
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    return ParseIntImpl< TDesC8, TLex8 >+
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        ( aResult, aSourceString, KHexPrefix8 );+
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    }+
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	+
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EXPORT_C TInt ParseInt( TInt32& aResult, const TDesC16& aSourceString )+
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    {+
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    return ParseIntImpl< TDesC16, TLex16 >+
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        ( aResult, aSourceString, KHexPrefix16 );+
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    }+
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	+
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EXPORT_C HBufC16* CopyToBufferL(HBufC16* aTargetBuffer, const TDesC16& aSourceText)+
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    {+
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    EnsureBufMaxLengthL( aTargetBuffer, aSourceText.Length() ).Copy( aSourceText );+
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    +
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    return aTargetBuffer;+
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    }+
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    +
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EXPORT_C HBufC16* CopyToBufferL(HBufC16* aTargetBuffer, const TDesC8& aSourceText)+
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    {+
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    if (!aTargetBuffer)+
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        {+
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        return CnvUtfConverter::ConvertToUnicodeFromUtf8L( aSourceText );+
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        }+
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        +
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    TPtr16 des( EnsureBufMaxLengthL( aTargetBuffer, aSourceText.Length() ) );+
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    +
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    CnvUtfConverter::ConvertToUnicodeFromUtf8( des, aSourceText );+
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    +
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    return aTargetBuffer;+
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    }+
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    +
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EXPORT_C HBufC8* CopyToBufferL(HBufC8* aTargetBuffer, const TDesC8& aSourceText)+
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    {+
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    ::EnsureBufMaxLengthL( aTargetBuffer, aSourceText.Length() ).Copy( aSourceText );+
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    return aTargetBuffer;+
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    }+
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+
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EXPORT_C HBufC8* CopyToBufferL(HBufC8* aTargetBuffer, const TDesC16& aSourceText)+
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    {+
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    if ( !aTargetBuffer )+
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        {+
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        return CnvUtfConverter::ConvertFromUnicodeToUtf8L( aSourceText );+
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        }+
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    +
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    TInt length = Utf8OctetCount( aSourceText );+
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    +
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    TPtr8 des( ::EnsureBufMaxLengthL( aTargetBuffer, length ) );    +
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    CnvUtfConverter::ConvertFromUnicodeToUtf8( des, aSourceText );+
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    return aTargetBuffer;+
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    }+
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    +
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EXPORT_C TPtr16 EnsureBufMaxLengthL(HBufC16*& aTargetBuffer, TInt aMaxLength )+
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    {+
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    if ( !aTargetBuffer )+
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        {+
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        aTargetBuffer = HBufC16::NewL( aMaxLength );+
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        }+
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    else+
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        {+
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        if ( aTargetBuffer->Des().MaxLength() < aMaxLength )+
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            {+
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            aTargetBuffer = aTargetBuffer->ReAllocL( aMaxLength );+
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            }+
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        }+
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        +
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    return aTargetBuffer->Des();+
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    }+
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+
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    }+
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+
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+
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// ---------------------------------------------------------------------------+
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// CStrParser()+
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// ---------------------------------------------------------------------------+
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//+
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CStrParser::CStrParser()+
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    {+
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    }+
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+
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// ---------------------------------------------------------------------------+
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// CStrParser* NewL()+
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// ---------------------------------------------------------------------------+
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//+
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CStrParser* CStrParser::NewL()+
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    { +
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    CStrParser* self = new ( ELeave ) CStrParser();+
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    CleanupStack::PushL( self );+
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    self->ConstructL();+
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    CleanupStack::Pop( self );+
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    return self;+
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    }+
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+
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// ---------------------------------------------------------------------------+
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// void ConstructL()+
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// ---------------------------------------------------------------------------+
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//+
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void CStrParser::ConstructL()+
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    {+
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    }+
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+
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// ---------------------------------------------------------------------------+
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// void Release()+
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// ---------------------------------------------------------------------------+
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//+
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void CStrParser::Release()+
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    {+
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    delete this;+
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    }+
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    +
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// ---------------------------------------------------------------------------+
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// TInt ParseInt( TInt32& aValue, const TDesC8& aStringValue )+
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// ---------------------------------------------------------------------------+
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//+
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TInt CStrParser::ParseInt( TInt32& aResult, const TDesC8& aSourceString )+
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    {+
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    return AiUtility::ParseInt( aResult, aSourceString );+
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    }+
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+
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// ---------------------------------------------------------------------------+
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// HBufC16* CopyToBufferL( HBufC16* aTargetBuffer, const TDesC16& aSourceText )+
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// ---------------------------------------------------------------------------+
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//    +
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HBufC16* CStrParser::CopyToBufferL( HBufC16* aTargetBuffer, const TDesC16& aSourceText )+
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    {+
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    return AiUtility::CopyToBufferL( aTargetBuffer, aSourceText );+
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    }+
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+
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// ---------------------------------------------------------------------------+
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// HBufC16* CopyToBufferL( HBufC16* aTargetBuffer, const TDesC8& aSourceText )+
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// ---------------------------------------------------------------------------+
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//+
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HBufC16* CStrParser::CopyToBufferL( HBufC16* aTargetBuffer, const TDesC8& aSourceText )+
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    {+
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    return AiUtility::CopyToBufferL( aTargetBuffer, aSourceText );+
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    }+
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+
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// ---------------------------------------------------------------------------+
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// HBufC8* CopyToBufferL( HBufC8* aTargetBuffer, const TDesC8& aSourceText )+
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// ---------------------------------------------------------------------------+
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//    +
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HBufC8* CStrParser::CopyToBufferL( HBufC8* aTargetBuffer, const TDesC8& aSourceText )+
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    {+
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    return AiUtility::CopyToBufferL( aTargetBuffer, aSourceText );+
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    }+
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+
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// ---------------------------------------------------------------------------+
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// HBufC8* CopyToBufferL( HBufC8* aTargetBuffer, const TDesC16& aSourceText )+
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// ---------------------------------------------------------------------------+
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//+
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HBufC8* CStrParser::CopyToBufferL( HBufC8* aTargetBuffer, const TDesC16& aSourceText )+
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    {+
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    return AiUtility::CopyToBufferL( aTargetBuffer, aSourceText );+
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    }+
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    +
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// End of File.+
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