1 /*

     2 * Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * Definition of the Swi::Sis::CString

    16 *

    17 */

    18 

    19 

    20 /**

    21  @file sisstring.cpp

    22 */

    23 

    24 #include <e32def.h>

    25 #include "sisstring.h"

    26 #include "sisfieldtypes.h"

    27 #include "sisdataprovider.h"

    28 #include "sisinstallerrors.h"

    29 

    30 using namespace Swi::Sis;

    31 

    32 EXPORT_C /*static*/ CString* CString::NewLC(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

    33 	{

    34 	CString* self = new(ELeave) CString();

    35 	CleanupStack::PushL(self);

    36 	self->ConstructL(aDataProvider, aBytesRead, aTypeReadBehaviour);

    37 	return self;

    38 	}

    39 

    40 EXPORT_C /*static*/ CString* CString::NewL(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

    41 	{

    42 	CString* self = NewLC(aDataProvider, aBytesRead, aTypeReadBehaviour);

    43 	CleanupStack::Pop(self);

    44 	return self;

    45 	}

    46 

    47 EXPORT_C CString* CString::NewL(TPtrProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

    48 	{

    49 	CString* self = CString::NewLC(aDataProvider, aBytesRead, aTypeReadBehaviour);

    50 	CleanupStack::Pop(self);

    51 	return self;	

    52 	}

    53 

    54 EXPORT_C CString* CString::NewLC(TPtrProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

    55 	{

    56 	CString* self = new (ELeave) CString;

    57 	CleanupStack::PushL(self);

    58 	self->ConstructL(aDataProvider, aBytesRead, aTypeReadBehaviour);

    59 	return self;

    60 	}

    61 

    62 CString::CString()

    63 	{

    64 	}

    65 

    66 EXPORT_C CString::~CString()

    67 	{

    68 	delete iData;

    69 	}

    70 

    71 void CString::ConstructL(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

    72 	{

    73 	TInt64 fieldOffset = aBytesRead;

    74 	

    75 	CField::ConstructL(aDataProvider, EFieldTypeString, aBytesRead, aTypeReadBehaviour);

    76 

    77 	// If string has an Odd Length, something is wrong.

    78 	if (I64LOW(Length()) & 0x1)

    79 		{

    80 		User::Leave(KErrSISInvalidStringLength);

    81 		}

    82 	

    83 	if (I64HIGH(Length()))

    84 		{

    85 		// Length is either -ve or to big for a string

    86 		User::Leave(KErrSISStringInvalidLength);

    87 		}

    88 	TInt32 stringLength=I64LOW(Length()) / 2;

    89 	iData= HBufC::NewL(stringLength);

    90 	

    91 	TPtr8 p(const_cast<TUint8*>(reinterpret_cast<const TUint8*>(iData->Des().Ptr())) , stringLength*2);

    92 	p.SetLength(stringLength*2);

    93 	CField::CheckedReadL(aDataProvider, p, stringLength*2, aBytesRead);

    94 	iData->Des().SetLength(stringLength);

    95 	iDataPtr.Set(*iData);

    96 	CField::EnsureAlignedL(aDataProvider, aBytesRead - fieldOffset, aBytesRead, aTypeReadBehaviour);

    97 	}

    98 	

    99 	

   100 void CString::ConstructL(TPtrProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

   101 	{

   102 	TInt64 fieldOffset = aBytesRead;

   103 	CField::ConstructL(aDataProvider, EFieldTypeString, aBytesRead, aTypeReadBehaviour);

   104 

   105 	// If string has an Odd Length, something is wrong.

   106 	if (I64LOW(Length()) & 0x1)

   107 		{

   108 		User::Leave(KErrSISInvalidStringLength);

   109 		}

   110 	

   111 	if (I64HIGH(Length()))

   112 		{

   113 		// Length is either -ve or to big for a string

   114 		User::Leave(KErrSISStringInvalidLength);

   115 		}

   116 	TInt32 stringLength=I64LOW(Length());

   117 	

   118 	// get a pointer to the underlying data.

   119 	const TUint8* ptr = aDataProvider.ReadL(stringLength).Ptr();

   120 	aBytesRead += stringLength;

   121 	

   122 	// cast it to a TUint16 and construct the pointer from it.

   123 	stringLength /= 2;

   124 	const TUint16* uPtr = reinterpret_cast<const TUint16*>(ptr);

   125 	iDataPtr.Set(uPtr, stringLength);

   126 	

   127 	CField::EnsureAlignedL(aDataProvider, aBytesRead - fieldOffset, aBytesRead, aTypeReadBehaviour);

   128 	}