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TMTPTypeNull Class Reference

class TMTPTypeNull : public MMTPType

Defines the MTP null (zero length) data type base class.

Inherits from

TMTPTypeNull
- MMTPType

Public Member Functions
	TMTPTypeNull()
IMPORT_C TInt	FirstReadChunk(TPtrC8 &)
IMPORT_C TInt	FirstWriteChunk(TPtr8 &)
IMPORT_C TInt	NextReadChunk(TPtrC8 &)
IMPORT_C TInt	NextWriteChunk(TPtr8 &)
IMPORT_C void	SetBuffer(const TDes8 &)
IMPORT_C TUint64	Size()
IMPORT_C TUint	Type()

Inherited Functions
	MMTPType::CommitChunkL(TPtr8 &)
	MMTPType::CommitRequired()const
	MMTPType::CopyL(const MMTPType &,MMTPType &)
	MMTPType::FirstWriteChunk(TPtr8 &,TUint)
	MMTPType::GetExtendedInterface(TUid)
	MMTPType::NextWriteChunk(TPtr8 &,TUint)
	MMTPType::ReserveTransportHeader(TUint,TPtr8 &)
	MMTPType::Validate()const

Private Attributes
TPtr8	iNullBuffer

Constructor & Destructor Documentation

TMTPTypeNull()

IMPORT_C

TMTPTypeNull

(

)

Default constructor.

Member Functions Documentation

FirstReadChunk(TPtrC8 &)

IMPORT_C TInt

FirstReadChunk

(

TPtrC8 &

aChunk

)

const [virtual]

Initiates a data read sequence on the type by providing a const pointer to the first in the sequence of data chunks that make up the type's data stream. Subsequent chunks in the sequence can be sequentially retrieved using NextReadChunk. NextReadChunk.

Parameters

TPtrC8 & aChunk

The const pointer to be set to point to the start of the first data chunk. This pointer's length is set to zero if no data chunk exists or a processing error occurs.

FirstWriteChunk(TPtr8 &)

IMPORT_C TInt

FirstWriteChunk

(

TPtr8 &

aChunk

)

[virtual]

Initiates a data write sequence on the type by providing a non-const pointer to the first in the sequence of data chunks that make up the type's data stream. Subsequent chunks in the sequence can be sequentially retrieved using NextWriteChunk. NextWriteChunk.

Parameters

TPtr8 & aChunk

The non-const pointer to be set to point to the start of the first data chunk. If successful, the pointer's Length is set to zero, and MaxLength is set to the available capacity of the data chunk. If not successful, the pointer's MaxLength is set to zero.

NextReadChunk(TPtrC8 &)

IMPORT_C TInt

NextReadChunk

(

TPtrC8 &

aChunk

)

const [virtual]

Continues a data read sequence on the type by providing a const pointer to the next in the sequence of data chunks that make up the type's data stream. This data read sequence should have been previously initiated by invoking FirstReadChunk. FirstReadChunk.

Parameters

TPtrC8 & aChunk

The const pointer to be set to point to the start of the next data chunk. This pointer's length is set to zero if no data chunk exists or a processing error occurs.

NextWriteChunk(TPtr8 &)

IMPORT_C TInt

NextWriteChunk

(

TPtr8 &

aChunk

)

[virtual]

Continues a data write sequence on the type by providing a non-const pointer to the next in the sequence of data chunks that make up the type's data stream. This data write sequence should have been previously initiated by invoking FirstWriteChunk. FirstReadChunk.

Parameters

TPtr8 & aChunk

The non-const pointer to be set to point to the start of the next data chunk. If successful, the pointer's Length is set to zero, and MaxLength is set to the available capacity of the data chunk. If not successful, the pointer's MaxLength is set to zero..

SetBuffer(const TDes8 &)

IMPORT_C void

SetBuffer

(

const TDes8 &

aBuffer

)

Sets the data sink buffer to be used in write data stream operations.

Parameters

const TDes8 & aBuffer

The data sink buffer.

Size()

IMPORT_C TUint64

Size

(

)

const [virtual]

Provides the size in bytes of the MTP data type.

Type()

IMPORT_C TUint

Type

(

)

const [virtual]

Provides the MTP data type identification datacode.

Member Data Documentation

TPtr8 iNullBuffer

TPtr8

iNullBuffer

[private]