EXPORT_C CWritePropPipe& CWritePropPipe::operator<<(const TDesC16& aSrc)
//
// Write the string to the buffer. If there is insufficient space, then leave with
// KErrOverflow
//
{
__ASSERT_DEBUG(iBuf, User::Invariant());
TPtr8 p = iBuf->Des();
if(p.MaxSize() < (p.Size() + aSrc.Size() + sizeof(TInt32)))
{
User::Leave(KErrOverflow);
}
TPckgBuf<TInt32> size(aSrc.Size());
p.Append(size);
TUint8* pTgt = new(ELeave)TUint8[aSrc.Size()+8];
const TAny* pSrc = &aSrc[0];
Mem::Copy(pTgt, pSrc, aSrc.Size());
TPtr8 p2(pTgt, aSrc.Size(), aSrc.Size());
p.Append(p2);
delete pTgt;
return *this;
}
EXPORT_C CWritePropPipe& CWritePropPipe::operator<<(const TInt32& aSrc)
{
__ASSERT_DEBUG(iBuf, User::Invariant());
TPtr8 p = iBuf->Des();
if(p.MaxSize() < (p.Size() + sizeof(TInt32)))
{
User::Leave(KErrOverflow);
}
TPckgBuf<TInt32> i(aSrc);
p.Append(i);
return *this;
}
// ---------------------------------------------------------------------------
// CTransactionIDGenerator::BuildInputDataL
// ---------------------------------------------------------------------------
//
HBufC8* CTransactionIDGenerator::BuildInputDataLC( TAny* aObject,
TInt aObjectSize )
{
const TInt KAmountOfRandomNbrsToFill = 10;
//Size of the input data buffer. It contains the following items:
//
//item item's size
//---- -----------
//iCounter sizeof( iCounter )
//aObject's state aObjectSize
//checksum of this sizeof( TUint16 )
//clock info sizeof( TInt64 ) + sizeof( TUint )
//system info sizeof( TUint16 ) + sizeof( TUint8 )
//KAmountOfRandomNbrsToFill
//random integer values KAmountOfRandomNbrsToFill * sizeof( TInt )
TInt dataSize = sizeof( iCounter ) + aObjectSize +
sizeof( TUint16 ) + sizeof( TInt64 ) + sizeof( TUint ) +
sizeof( TUint16 ) + sizeof( TUint8 ) +
KAmountOfRandomNbrsToFill * sizeof( TInt );
HBufC8* buf = HBufC8::NewLC( dataSize );
TPtr8 ptr = buf->Des();
ptr.Append( reinterpret_cast<const TUint8*>( &iCounter ),
sizeof( iCounter ) );
ptr.Append( reinterpret_cast<const TUint8*>( aObject ), aObjectSize );
ComputeChecksum( ptr, this, sizeof( this ) );
AddClockInfo( ptr );
AddSystemInfo( ptr );
TInt random = 0;
TInt randomNumberSize = sizeof( random );
while ( ptr.Size() <= ( ptr.MaxSize() - randomNumberSize ) )
{
random = Math::Rand( iSeed );
ptr.Append( reinterpret_cast<const TUint8*>( &random ),
sizeof( random ) );
}
return buf;
}
EXPORT_C CWritePropPipe& CWritePropPipe::operator<<(const TDesC8& aSrc)
//
// Write the string to the buffer. If there is insufficient space, then leave with
// KErrOverflow
//
{
__ASSERT_DEBUG(iBuf, User::Invariant());
TPtr8 p = iBuf->Des();
if(p.MaxSize() < (p.Size() + aSrc.Size() + sizeof(TInt32)))
{
User::Leave(KErrOverflow);
}
TPckgBuf<TInt32> size(aSrc.Size());
p.Append(size);
p.Append(aSrc);
return *this;
}
// ---------------------------------------------------------------------------
// Run state machine for backup. Each file is opened and streamed to the
// BUR engine.
// ---------------------------------------------------------------------------
//
void CAknsSrvActiveBackupDataClient::GetBackupDataSectionL(
TPtr8& aBuffer, TBool& aFinished)
{
AKNS_TRACE_DEBUG("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL" );
// Make sure that the buffer is empty and starts from the beginning
aBuffer.SetLength(0);
// don't assume they set it to false
aFinished = EFalse;
// any files to backup
if( iFileArray.Count() == 0 )
{
// nothing to backup - just return the finished flag
aFinished = ETrue;
// clear the list and stop.
iFileArray.Reset();
AKNS_TRACE_DEBUG("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL no files" );
return;
}
// run the state machine
while( ETrue )
{
switch( iBackupState )
{
// open a file for processing
case EBackupNoFileOpen:
{
AKNS_TRACE_DEBUG1("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL state %d", iBackupState );
if( iFileIndex >= iFileArray.Count() )
{
// all files have been processed - send the finished flag
aFinished = ETrue;
// clear the list and stop.
iFileArray.Reset();
AKNS_TRACE_DEBUG("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL all processed" );
return;
}
// open file to send
TInt rc=iFile.Open( iFsSession,
iFileArray[iFileIndex].FullName(),
( EFileRead | EFileShareExclusive | EFileStream ) );
if( rc != KErrNone )
{
// there's nothing we can do if we can't open the file
// so we just skip it
AKNS_TRACE_DEBUG("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL skip file" );
++iFileIndex;
break;
}
iBackupState = EBackupOpenNothingSent;
break;
}
// nothing sent (so far) for this file - send the header info
case EBackupOpenNothingSent:
{
AKNS_TRACE_DEBUG1("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL state %d", iBackupState );
TInt fileSize;
TInt retValue = iFile.Size( fileSize );
if( retValue != KErrNone || fileSize == 0 )
{
// empty or unreadable - skip this file
iBackupState = EBackupEndOfFile;
AKNS_TRACE_DEBUG("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL skip file2" );
break;
}
// build the header - this is an instance member because it
// has to persist over multiple calls to this method
TPtr headerPtr = iBuffer->Des();
// get the checksum - only grab last 4 bytes - enough to be satisfied that
// the backup and restore worked ok
TUint64 checksum = CheckSumL( iFile ) & 0xffffffff;
// build the header - note NOT AppendFormat(); wipes out previous content.
// <no of files><checksum><filesize><filenamelen><filename>
headerPtr.Format(_L("%8x%8lx%8x%8x"),
iFileArray.Count(),
checksum,
fileSize,
iFileArray[iFileIndex].FullName().Length());
headerPtr.Append( iFileArray[iFileIndex].FullName() );
// we need it to look like an 8bit buffer
TPtr8 headerPtr8(
(TUint8*)headerPtr.Ptr(),
headerPtr.Size(),
headerPtr.Size() );
// Check how much room is left in the buffer.
// it starts out empty when we get it from the BUE
TInt available = aBuffer.MaxSize() - aBuffer.Size();
// Check is there enough room for the whole header.
TBool enoughRoom = headerPtr8.Size() < available;
// append the header to the buffer (only till it's full)
aBuffer.Append(
headerPtr8.Ptr(),
enoughRoom ? headerPtr8.Size() : available) ;
// decide what needs to happen next
// if complete then we need data, otherwise we need to put
// the rest of the header in the next chunk
if( enoughRoom )
{
iBackupState = EBackupOpenAllHeaderSent;
}
else
{
// we need to keep track of how much of the header has
// been sent so that we only send the reminder on the next
// iteration
iHeaderSent = available;
iBackupState = EBackupOpenPartHeaderSent;
}
// if the buffer's full we need to return control to the backup engine
// Because the finishedFlag is not set, the BUE will process this
// chunk and then ask for another
if( aBuffer.Size() == aBuffer.MaxSize() )
{
return;
}
break;
}
// need to send the rest of the header
case EBackupOpenPartHeaderSent:
{
AKNS_TRACE_DEBUG1("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL state %d", iBackupState );
// get back the header - this is already loaded with the necessary info
// from the previous state we were in
TPtr headerPtr = iBuffer->Des();
// we need it to look like an 8bit buffer
TPtr8 headerPtr8(
(TUint8*)headerPtr.Ptr(),
headerPtr.Size(),
headerPtr.Size() );
// Check how many bytes have we yet to send.
TInt bytesRemaining = headerPtr.Size() - iHeaderSent;
// Check how much room in the buffer.
TInt available = aBuffer.MaxSize() - aBuffer.Size();
// enough, if not send as much as we can
TBool enoughRoom = bytesRemaining < available;
aBuffer.Append(
headerPtr8.Ptr() + iHeaderSent,
enoughRoom ? bytesRemaining : available );
if( enoughRoom )
{
iHeaderSent = 0; // ready for next header
iBackupState = EBackupOpenAllHeaderSent;
}
else
{
iHeaderSent += available; // ready to do round again
// state remains as EBackupOpenPartHeaderSent
}
// if the buffer's full we need to return control to the backup engine
// Because the finishedFlag is not set, the BUE will process this
// chunk and then ask for another
if( aBuffer.Size() == aBuffer.MaxSize() )
{
return;
}
break;
}
// need to send some data
case EBackupOpenAllHeaderSent:
{
AKNS_TRACE_DEBUG1("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL state %d", iBackupState );
// how many bytes can we send
TInt available = aBuffer.MaxSize() - aBuffer.Size();
// create a buffer for this data (plus one for PtrZ)
HBufC8* transferBuffer = HBufC8::NewLC( available + 1 );
TPtr8 bufferToSend = transferBuffer->Des();
// get the data
User::LeaveIfError( iFile.Read( bufferToSend, available ) );
// Check how much did we actually read.
TInt bytesRead = bufferToSend.Size();
// EOF
if( bytesRead == 0 )
{
CleanupStack::PopAndDestroy( transferBuffer );
iBackupState = EBackupEndOfFile;
break;
}
// add it to the aBuffer
aBuffer.Append( bufferToSend.PtrZ(), bytesRead );
// tidy up
CleanupStack::PopAndDestroy( transferBuffer );
// if the buffer's full we need to return control to the backup engine
if( aBuffer.Size() == aBuffer.MaxSize() )
{
return;
}
break;
}
// At the end of the current file.
case EBackupEndOfFile:
{
AKNS_TRACE_DEBUG1("CAknsSrvActiveBackupDataClient::GetBackupDataSectionL state %d", iBackupState );
// how many bytes can we send
if ( aBuffer.Size() != 0 )
{
TInt available = aBuffer.MaxSize() - aBuffer.Size();
// pad the end of the buffer with NULL.
HBufC8* transferBuffer = HBufC8::NewLC( available + 1 );
TPtr8 bufferToSend = transferBuffer->Des();
bufferToSend.FillZ();
aBuffer.Append( bufferToSend.PtrZ(), available );
CleanupStack::PopAndDestroy( transferBuffer );
if( aBuffer.Size() != aBuffer.MaxSize() )
{
// Sanity check
User::Leave( KErrGeneral );
}
}
// Close file and move on to next file.
iFile.Close();
++iFileIndex;
// Start all over again.
iBackupState = EBackupNoFileOpen;
break;
}
default:
{
// not reachable
return;
}
}
}
}
