/*

* Copyright (c) 2003-2005 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:     Implementation of class TAiwVariant.

*

*/

// INCLUDES

#ifdef _DEBUG

#include <e32svr.h>

#endif

#include "AiwVariant.h"

// ============================= LOCAL FUNCTIONS ===============================

namespace {

// CONSTANTS

/// TAiwVariant streaming version

const TInt KVersion = 10;  // Version 1.0

// Debug helpers

#ifdef _DEBUG

enum TPanicCode

    {

    EPanicPostCond_Constructor = 1,

    EPanicPostCond_Reset,

    EPanicPostCond_Set_TInt32,

    EPanicPostCond_Set_TUid,

    EPanicPostCond_Set_TTime,

    EPanicPostCond_Set_TDesC,

    EPanicPostCond_CopyL,

    EPanicInvariant_InvalidDesCState,

    EPanicPostCond_Set_TDesC8,

    EPanicPreCond_DataSizeMismatch

    };

void Panic(TPanicCode aCode)

    {

    _LIT(KPanicText, "TAiwVariant");

    User::Panic(KPanicText, aCode);

    }

#endif  // #ifdef _DEBUG

}  // namespace

// ============================ MEMBER FUNCTIONS ===============================

#ifdef _DEBUG

void TAiwVariant::__DbgTestInvariant() const

    {

    if (iTypeId==EVariantTypeDesC && iData.iBufC)

        {

        __ASSERT_ALWAYS(iData.iBufC->Ptr() == iPtrC.Ptr(), 

            Panic(EPanicInvariant_InvalidDesCState));

        }

    }

#endif  // #ifdef _DEBUG

inline void TAiwVariant::SInt64::InternalizeL(RReadStream& aStream)

    {

    TInt32 low = aStream.ReadInt32L();

    iHigh = aStream.ReadInt32L();

    iLow = low;

    }

inline void TAiwVariant::SInt64::ExternalizeL(RWriteStream& aStream) const

    {

    aStream.WriteInt32L(iLow);

    aStream.WriteInt32L(iHigh);

    }

inline void TAiwVariant::SInt64::Set(const TInt64& aTInt64)

    {

    iLow = I64LOW(aTInt64);

    iHigh = I64HIGH(aTInt64);

    }

inline TAiwVariant::SInt64::operator TInt64() const

    {

    return MAKE_TINT64(iHigh,iLow);

    }

inline TBool TAiwVariant::SInt64::operator==(const SInt64& aRhs) const

    {

    return (iHigh==aRhs.iHigh && iLow==aRhs.iLow);

    }

EXPORT_C TAiwVariant::TAiwVariant(const TAiwVariant& aSrc) :

    iTypeId(aSrc.iTypeId), iData(aSrc.iData), iPtrC(), iPtrC8()

    {

    if (iTypeId == EVariantTypeDesC)

        {

        iPtrC.Set(aSrc.iPtrC);

        // Do not take ownership of data

        iData.iBufC = NULL;

        }

    else if ( iTypeId == EVariantTypeDesC8 )

        {

        iPtrC8.Set( aSrc.iPtrC8 );

        // Do not take ownership of data

        iData.iBufC8 = NULL;

        }

    }

EXPORT_C TAiwVariant& TAiwVariant::operator=(const TAiwVariant& aSrc)

    {

    // Check self-assignment first.

    if (this == &aSrc)

        {

        return *this;

        }

    iTypeId = aSrc.iTypeId;

    iData = aSrc.iData;

    if (iTypeId == EVariantTypeDesC)

        {

        iPtrC.Set(aSrc.iPtrC);

        // Do not take ownership of data

        iData.iBufC = NULL;

        }

    else if ( iTypeId == EVariantTypeDesC8 )

        {

        iPtrC8.Set( aSrc.iPtrC8 );

        // Do not take ownership of data

        iData.iBufC8 = NULL;

        }

    return *this;

    }

EXPORT_C TBool TAiwVariant::Get(TInt32& aValue) const

    {

    __TEST_INVARIANT;

    if (iTypeId == EVariantTypeTInt32)

        {

        aValue = iData.iInt32;

        return ETrue;

        }

    return EFalse;

    }

EXPORT_C TBool TAiwVariant::Get(TUid& aValue) const

    {

    __TEST_INVARIANT;

    if (iTypeId == EVariantTypeTUid)

        {

        aValue = TUid::Uid(iData.iInt32);

        return ETrue;

        }

    return EFalse;

    }

EXPORT_C TBool TAiwVariant::Get(TPtrC& aValue) const

    {

    __TEST_INVARIANT;

    if (iTypeId == EVariantTypeDesC)

        {

        aValue.Set(iPtrC);

        return ETrue;

        }

    return EFalse;

    }

EXPORT_C TBool TAiwVariant::Get(TTime& aValue) const

    {

    __TEST_INVARIANT;

    if (iTypeId == EVariantTypeTTime)

        {

        aValue = TTime(iData.iInt64);

        return ETrue;

        }

    return EFalse;

    }

EXPORT_C TBool TAiwVariant::Get(TPtrC8& aValue) const

    {

     __TEST_INVARIANT;  

    if (iTypeId == EVariantTypeDesC8)

        {

        aValue.Set(iPtrC8);

        return ETrue;

        }   

    return EFalse;

    }

EXPORT_C TBool TAiwVariant::Get(RFile& aValue) const

    {

    __TEST_INVARIANT;

    if (iTypeId == EVariantTypeFileHandle)

        {

        aValue = *((RFile*)&iData.iInt64);      

        return ETrue;

        }

    return EFalse;

    }

EXPORT_C TInt32 TAiwVariant::AsTInt32() const

    {

    TInt32 value = 0;

    Get(value);

    return value;

    }   

EXPORT_C TUid TAiwVariant::AsTUid() const

    {

    __TEST_INVARIANT;

    TUid value = {0};

    Get(value);

    return value;

    }

EXPORT_C TPtrC TAiwVariant::AsDes() const

    {

    __TEST_INVARIANT;

    TPtrC value;

    Get(value);

    return value;

    }

EXPORT_C TTime TAiwVariant::AsTTime() const

    {

    __TEST_INVARIANT;

    TTime value(Time::NullTTime());

    Get(value);

    return value;

    }

EXPORT_C TPtrC8 TAiwVariant::AsData() const

    {

     __TEST_INVARIANT;

    TPtrC8 value;

    Get(value);

    return value;

    }

EXPORT_C RFile TAiwVariant::AsFileHandle() const

    {

    __TEST_INVARIANT;

    RFile value;

    Get(value);

    return value;

    }

EXPORT_C void TAiwVariant::Reset()

    {

    __TEST_INVARIANT;

    if (iTypeId == EVariantTypeDesC)

        {

        // Delete any owned buffer

        delete iData.iBufC;

        iData.iBufC = NULL;

        }

    else if (iTypeId == EVariantTypeDesC8)

        {

        delete iData.iBufC8;

        iData.iBufC8 = NULL;

        }       

    // No need to clear other data, because Get methods wont't do anything if type

    // is Null.

    iTypeId = EVariantTypeNull;

    __ASSERT_DEBUG(IsEmpty(), Panic(EPanicPostCond_Reset));

    __TEST_INVARIANT;

    }

EXPORT_C void TAiwVariant::Set(TInt32 aValue)

    {

    __TEST_INVARIANT;

    Reset();

    iTypeId = EVariantTypeTInt32;

    iData.iInt32 = aValue;

    __ASSERT_DEBUG(this->AsTInt32()==aValue, Panic(EPanicPostCond_Set_TInt32));

    __TEST_INVARIANT;

    }

EXPORT_C void TAiwVariant::Set(const TUid& aValue)

    {

    __TEST_INVARIANT;

    Reset();

    iTypeId = EVariantTypeTUid;

    iData.iInt32 = aValue.iUid;

    __ASSERT_DEBUG(this->AsTUid()==aValue, Panic(EPanicPostCond_Set_TUid));

    __TEST_INVARIANT;

    }

EXPORT_C void TAiwVariant::Set(const TTime& aValue)

    {

    __TEST_INVARIANT;

    Reset();

    iTypeId = EVariantTypeTTime;

    iData.iInt64.Set(aValue.Int64());

    __ASSERT_DEBUG(this->AsTTime()==aValue, Panic(EPanicPostCond_Set_TTime));

    __TEST_INVARIANT;

    }

EXPORT_C void TAiwVariant::Set(const TDesC& aValue)

    {

    __TEST_INVARIANT;

    Reset();

    iTypeId = EVariantTypeDesC;

    iData.iBufC = NULL;  // not owned

    iPtrC.Set(aValue);

    __ASSERT_DEBUG(this->AsDes()==aValue, Panic(EPanicPostCond_Set_TDesC));

    __TEST_INVARIANT;

    }

EXPORT_C void TAiwVariant::Set(const TDesC8& aValue)

    {

   __TEST_INVARIANT;

    Reset();

    iTypeId = EVariantTypeDesC8;

    iData.iBufC8 = NULL;  // not owned

    iPtrC8.Set(aValue);

    __ASSERT_DEBUG(this->AsData()==aValue, Panic(EPanicPostCond_Set_TDesC));

    __TEST_INVARIANT;

    }

EXPORT_C void TAiwVariant::Set(const RFile& aValue)

    {

    __TEST_INVARIANT;

    __ASSERT_DEBUG(sizeof(SInt64) == sizeof(RFile), Panic(EPanicPreCond_DataSizeMismatch));

    Reset();

    iTypeId = EVariantTypeFileHandle;

    *((RFile*)&iData.iInt64) = aValue;

    __TEST_INVARIANT;

    }

void TAiwVariant::SetL(const TAiwVariant& aValue)

    {

    __TEST_INVARIANT;

    if (aValue.iTypeId == EVariantTypeDesC)

        {

        // Take an own copy of the string value

        HBufC* buf = aValue.iPtrC.AllocL();

        Reset();

        iTypeId = EVariantTypeDesC;

        iData.iBufC = buf;

        iPtrC.Set(*iData.iBufC);

        }

    else if (aValue.iTypeId == EVariantTypeDesC8)

        {

        // Take an own copy of the data

        HBufC8* buf = aValue.iPtrC8.AllocL();

        Reset();

        iTypeId = EVariantTypeDesC8;

        iData.iBufC8 = buf;

        iPtrC8.Set(*iData.iBufC8);

        }

    else

        {

        Reset();

        iTypeId = aValue.iTypeId;

        // Copy the data union as one block

        iData = aValue.iData;

        }

    __ASSERT_DEBUG(*this == aValue, Panic(EPanicPostCond_CopyL));

    __TEST_INVARIANT;

    }

void TAiwVariant::Destroy()

    {

    __TEST_INVARIANT;

    if (iTypeId == EVariantTypeDesC)

        {

        // Delete any owned buffer

        delete iData.iBufC;

        iData.iBufC = NULL;

        }

    else if (iTypeId == EVariantTypeDesC8)

        {

        delete iData.iBufC8;

        iData.iBufC8 = NULL;

        }

    }

void TAiwVariant::InternalizeL(RReadStream& aStream)

    {

    __TEST_INVARIANT;

    aStream.ReadInt8L(); // version

    // if older version adapt to changes (who knows if

    // parameters would be also persistent...)

    const TUint8 typeId = aStream.ReadUint8L();

    switch (typeId)

        {

        case EVariantTypeNull:

            {

            Reset();

            break;

            }

        case EVariantTypeTInt32:  // FALLTHROUGH

        case EVariantTypeTUid:

            {

            TInt32 value = aStream.ReadInt32L();

            Reset();

            iTypeId = typeId;

            iData.iInt32 = value;

            break;

            }

        case EVariantTypeFileHandle: // FALLTHROUGH

        case EVariantTypeTTime:

            {

            SInt64 value;

            value.InternalizeL(aStream);

            Reset();

            iTypeId = typeId;

            iData.iInt64 = value;

            break;

            }

        case EVariantTypeDesC:

            {

            const TInt len = aStream.ReadInt32L();

            HBufC* buf = HBufC::NewL(aStream,len);

            Reset();

            iTypeId = typeId;

            iData.iBufC = buf;

            iPtrC.Set(*iData.iBufC);

            break;

            }

        case EVariantTypeDesC8:

            {

            const TInt len = aStream.ReadInt32L();

            HBufC8* buf = HBufC8::NewL(aStream,len);

            Reset();

            iTypeId = typeId;

            iData.iBufC8 = buf;

            iPtrC8.Set(*iData.iBufC8);

            break;

            }

        default:

            {

             // Corrupted data stream.

#ifdef _DEBUG

            RDebug::Print(_L("***ERROR TAiwVariant::InternalizeL"));

#endif

            User::Leave(KErrCorrupt);

            return;

            }

        }

    __TEST_INVARIANT;

    }

void TAiwVariant::ExternalizeL(RWriteStream& aStream) const

    {

    __TEST_INVARIANT;

    aStream.WriteInt8L(KVersion);

    // if older version adapt to changes (who knows if parameters would be also persistent...)

    aStream.WriteUint8L(iTypeId);

    switch (iTypeId)

        {

        case EVariantTypeTInt32: // FALLTHROUGH

        case EVariantTypeTUid:

            {

            aStream.WriteInt32L(iData.iInt32);

            break;

            }

        case EVariantTypeFileHandle: // FALLTHROUGH

        case EVariantTypeTTime:

            {

            iData.iInt64.ExternalizeL(aStream);

            break;

            }

        case EVariantTypeDesC:

            {

            aStream.WriteInt32L(iPtrC.Length());

            aStream << iPtrC;

            break;

            }

        case EVariantTypeDesC8:

            {

            aStream.WriteInt32L(iPtrC8.Length());

            aStream << iPtrC8;

            break;

            }

        default: