cStream

The cStream Class provides a basic, simple implementation for IStream interface. More...

#include <stream.h>

Inheritance diagram for cStream:

Public Types
enum	tStreamType : uint8_t { INPUT_STREAM = 1 , OUTPUT_STREAM = 2 }
	Stream direction type. More...

Public Member Functions
	cStream (tStreamType eType, tFileSize szBuffer=0, uint32_t ui32Flags=0)
	Constructs a Stream with the current size.
virtual	~cStream ()
	Destructor.
tResult	SetSize (tFileSize szBuffer, uint32_t ui32Flags=0)
	Sets the current size of the stream.
tResult	CopyTo (cStream &strmOutput) const
	Copies a Stream to another.
tResult	CopyFrom (cStream &strmInput)
	Copies content from another Stream.
const void *	GetCurrentPtr () const
	Gets the address of the buffers current seek position.
tFileSize	GetCurrentSize () const
	Returns the current buffer size.
tFileSize	GetHighestPosIndex () const
	Returns the current buffer size which was written (without a gap at the end).
tResult	AttachReference (void *pReferenceBuffer, tFileSize szBufferSize)
	Reference to a extern buffer (no intern buffer will be used to write to or read from).
tResult	DetachReference ()
	Reference to a buffer will be detached.
tResult	Read (void *pvBuffer, size_t nBufferSize, size_t *pnBytesRead=nullptr) const override
	Implements.
tResult	Write (const void *pvBuffer, size_t nBufferSize, size_t *pnBytesWritten=nullptr) override
	Implements.
tResult	Seek (tFilePos nPos, tSeekOrigin eOrigin, tFilePos *pNewPos=nullptr) const override
	Implements Seek.
tResult	Reset () override
	Implements.
tResult	Flush () override
	Implements.
Public Member Functions inherited from object< IInputStream, IOutputStream, IStream >
tResult	GetInterface (const char *i_strIID, void *&o_pInterface) override
	Query interfaces on an object.
tResult	GetInterface (const char *i_strIID, const void *&o_pInterface) const override
	Provides const correct interface querying.
void	Destroy () const override
	Switch from non-virtual destructor to virtual destructor.
tResult	GetInterface (const char *i_strIID, void *&o_pInterface) override
	Query interfaces on an object.
tResult	GetInterface (const char *i_strIID, const void *&o_pInterface) const override
	Provides const correct interface querying.
void	Destroy () const override
	Switch from non-virtual destructor to virtual destructor.
tResult	GetInterface (const char *i_strIID, void *&o_pInterface) override
	Query interfaces on an object.
tResult	GetInterface (const char *i_strIID, const void *&o_pInterface) const override
	Provides const correct interface querying.
void	Destroy () const override
	Switch from non-virtual destructor to virtual destructor.
Public Member Functions inherited from IObject
	ADTF_IID (IObject, "object.ant.ucom.adtf.iid")
	Marks the IObject to be castable with the ucom_cast()

Protected Types
enum	tStreamFlags { FLG_KEEP_POSITION = 1 , FLG_DONT_GROW = 2 }
	Stream flags. More...

Protected Member Functions
bool	IsEof () const
	Checks if end of stream is reached.
tFileSize	GetRemainingBytes () const
Protected Member Functions inherited from IObject
	~IObject ()=default
	Protected destructor --> Only the final implementation can be destroyed!

Protected Attributes
tStreamType	m_eType
	Type of Stream, see tStreamType.

Private Member Functions
	cStream (const cStream &oStream)=delete
cStream &	operator= (const cStream &oStream)=delete
cStream &	operator= (cStream &&oStream)=delete
	cStream (cStream &&oStream)=delete

Detailed Description

The cStream Class provides a basic, simple implementation for IStream interface.

Definition at line 20 of file stream.h.

Member Enumeration Documentation

tStreamFlags

enum tStreamFlags

protected

Stream flags.

Enumerator
FLG_KEEP_POSITION	Sets correct end of file marker at. See also cStream::SetSize() call.
FLG_DONT_GROW	Will only have the at construction time decided size.

Definition at line 43 of file stream.h.

tStreamType

enum tStreamType : uint8_t

Stream direction type.

Enumerator
INPUT_STREAM	Is a Input Stream (can be read).
OUTPUT_STREAM	Is a Output Stream (can be written).

Definition at line 29 of file stream.h.

Constructor & Destructor Documentation

cStream()

cStream ( tStreamType eType, tFileSize szBuffer = 0, uint32_t ui32Flags = 0 )

explicit

Constructs a Stream with the current size.

Parameters

eType	[in] The In or Ouput Type.
szBuffer	[in] The stream buffer size which will be preallocated.
ui32Flags	[in] The creating flags (

See also

tStreamFlags).

Member Function Documentation

AttachReference()

tResult AttachReference	(	void *	pReferenceBuffer,
		tFileSize	szBufferSize )

Reference to a extern buffer (no intern buffer will be used to write to or read from).

Mind: A SetSize will be failed, while a Buffer is attached!!

Parameters

pReferenceBuffer	Reference to the extern buffer.
szBufferSize	Size of the Extern buffer.

Returns

Standard Result Code.

CopyFrom()

tResult CopyFrom

(

cStream &

strmInput

)

Copies content from another Stream.

Parameters

strmInput

The Stream to copy from.

Returns

Standard Result Code.

CopyTo()

tResult CopyTo

(

cStream &

strmOutput

)

const

Copies a Stream to another.

Parameters

strmOutput

The Stream to copy to.

Returns

Standard Result Code.

DetachReference()

tResult DetachReference

(

)

Reference to a buffer will be detached.

See also

AttachReference.

Returns

Standard Result Code.

Flush()

tResult Flush ( )

override

Implements.

See also

IStream::Flush. This function is not supported in the cStream implementation.

Returns

Standard Result Code.

GetCurrentPtr()

const void * GetCurrentPtr

(

)

const

Gets the address of the buffers current seek position.

Returns

The buffer address.

Note

rtsafe

GetCurrentSize()

tFileSize GetCurrentSize

(

)

const

Returns the current buffer size.

Returns

The buffer size.

Note

rtsafe

GetHighestPosIndex()

tFileSize GetHighestPosIndex

(

)

const

Returns the current buffer size which was written (without a gap at the end).

Returns

The current highest pos reached with the Write() call.

Note

rtsafe

GetRemainingBytes()

tFileSize GetRemainingBytes ( ) const

protected

Returns

Remaing vount of bytes

Note

rtsafe

IsEof()

bool IsEof ( ) const

protected

Checks if end of stream is reached.

Return values

true	End of stream reached
false	End of stream is not reached

Note

rtsafe

Read()

tResult Read ( void * pvBuffer, size_t nBufferSize, size_t * pnBytesRead = nullptr ) const

override

Implements.

See also

IStream::Read. Will Read from the intern Buffer or extern reference attached.

Parameters

pvBuffer	reference address the cStream will copy the read data to.
nBufferSize	size of bytes to read.
pnBytesRead	return value for size of bytes read.

Returns

Standard Result Code.

Note

rtsafe

Reset()

tResult Reset ( )

override

Implements.

See also

IStream::Seek. Sets the current position in the stream to the begin.

Returns

Standard Result Code.

Note

rtsafe

Seek()

tResult Seek ( tFilePos nPos, tSeekOrigin eOrigin, tFilePos * pNewPos = nullptr ) const

override

Implements Seek.

Sets the current position in the stream.

Parameters

nPos	Position to set to (in bytes).
eOrigin	tSeekOrigin.
pNewPos	return value for the new position (same as

See also

GetCurrentPtr).

Returns

Standard Result Code.

Note

rtsafe

SetSize()

tResult SetSize	(	tFileSize	szBuffer,
		uint32_t	ui32Flags = 0 )

Sets the current size of the stream.

Parameters

szBuffer	[in] The stream buffer size which will be allocated.
ui32Flags	[in] The set size flags (

See also

tStreamFlags).

Returns

Standard Result Code.

Write()

tResult Write ( const void * pvBuffer, size_t nBufferSize, size_t * pnBytesWritten = nullptr )

override

Implements.

See also

IStream::Write. Writes to the intern buffer or extern reference attached.

Parameters

pvBuffer	reference address the cStream will copy the data from.
nBufferSize	size of bytes to write.
pnBytesWritten	return value for size of bytes written.

Returns

Standard Result Code.

Member Data Documentation

m_eType

tStreamType m_eType

protected

Type of Stream, see tStreamType.

Definition at line 39 of file stream.h.