CP_PtrBlockInStream Class Reference

Inheritance diagram for CP_PtrBlockInStream:

List of all members.

Public Member Functions
Positioning
virtual bool	IsEOF () const
Positioning
virtual bool	IsEOF () const
Constructor / Destructor
	CP_PtrBlockInStream (const CP_PtrBlock *inBlock, bool inHasHeader=true)
	Constructor.
	CP_PtrBlockInStream (const CP_PtrBlock *inBlock, UInt32 inBeginPosition, bool inHasHeader=true)
virtual	~CP_PtrBlockInStream () throw ()
	Destructor.
Getters
virtual UInt32	GetLength () const
PtrBlock
const CP_PtrBlock *	GetPtrBlock () const
void	SetPtrBlock (const CP_PtrBlock *inPtrBlock)
Positioners
virtual UInt32	GetPosition () const
virtual void	SetPosition (UInt32 inPosition)
Positioning
virtual bool	IsEOF () const
Protected Member Functions
Reading
virtual UInt32	OnReadBytes (void *inDestBuffer, UInt32 inNumberBytes)
Protected Attributes
const CP_PtrBlock *	fPtrBlock
UInt32	fCurrentPosition
bool	fHasReadHeader
bool	fNeedsByteSwap
UInt16	fCPLATStreamVersion
bool	fHasTaggedData
bool	fHasHeader
char	fDesiredEdian

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Constructor & Destructor Documentation

CP_PtrBlockInStream::CP_PtrBlockInStream (  const CP_PtrBlock *  inBlock, bool  inHasHeader = true )

Constructor. Parameters: inBlock  The handle block that we are going to read our data from. inHasHeader  Flag to indicate if the data in the file was written by CPLAT, and therefore will have a header at the beginning of the streamed data. Exceptions: none

CP_PtrBlockInStream::CP_PtrBlockInStream (  const CP_PtrBlock *  inBlock, UInt32  inBeginPosition, bool  inHasHeader = true )

Constructor. Parameters: inBlock  The handle block that we are going to read our data from. inBeginPosition  The initial position within our block to begin reading data from. inHasHeader  Flag to indicate if the data in the file was written by CPLAT, and therefore will have a header at the beginning of the streamed data. Exceptions: none

CP_PtrBlockInStream::~CP_PtrBlockInStream (   )  throw () [virtual]

Destructor. Exceptions: none

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Member Function Documentation

UInt32 CP_PtrBlockInStream::GetLength (   )  const [virtual]

Returns the length of the handle block used with this stream. Exceptions: OSStatus  exceptions from the handle block. Returns: SInt32 const The length of the handle block used with this stream. Implements CP_InStream.

const CP_PtrBlock* CP_PtrBlockInStream::GetPtrBlock (   )  const

void CP_PtrBlockInStream::SetPtrBlock (  const CP_PtrBlock *  inPtrBlock  )

Sets the CP_PtrBlock associated with this stream. The CP_PtrBlock's lifetime must last until the stream is deallocated or until another block is attached to the stream through this call. Parameters: inPtrBlock  The handle block object to associate with this stream. Exceptions: none  Returns: void

UInt32 CP_PtrBlockInStream::GetPosition (   )  const [virtual]

Returns the current position marker to indicate the current position we are writing to our stream. Exceptions: none  Returns: SInt32 const The current position of the handle block marker. Implements CP_InStream.

void CP_PtrBlockInStream::SetPosition (  UInt32  inNewPosition  )  [virtual]

Sets the current position marker to mark the current position in our output stream. Parameters: inPosition  The position to set the current stream position marker to. Exceptions: none  Returns: void Implements CP_InStream.

UInt32 CP_PtrBlockInStream::OnReadBytes (  void *  inBuffer, UInt32  inBytesToRead )  [protected, virtual]

Reads data from our handle block, placing the data in the passed in buffer. The buffer should be at least as large as the passed in inBytesToRead. This method will return the actual number of bytes read. Parameters: inBuffer  The buffer to hold the data. inBytesToRead  The number of bytes to read from the buffer. The buffer should be at least this many bytes. Exceptions: none  Returns: Actual number of bytes read. Implements CP_InStream.

UInt32 CP_InStream::ReadBytes (  void *  inDestBuffer, UInt32  inNumberBytes, bool  inAllowPartialData = false )  [virtual, inherited]

Reads some data from the stream. Used by the >> operators to read the data, but can also be used in an application. Parameters: inDestBuffer  Location to read the data into. inNumberBytes  Length of the buffer to hold the data. inAllowPartialData  If true, less than the requested number of bytes may be read. Otherwise, if not enough data is available, an exception is raised. Exceptions: CP_OSErrorException(eofErr)  raised if inAllowPartialData is false and not enough data can be read. Returns: UInt32 The number of bytes actually read. If inAllowPartialData is true, this may be less than the requested number of bytes.

bool CP_InStream::NeedsByteSwap (   )  const [inherited]

void CP_InStream::SetNeedsByteSwap (  bool  doSwap  )  [inherited]

UInt16 CP_InStream::GetStreamVersion (   )  const [inherited]

bool CP_InStream::HasHeader (   )  const [inherited]

bool CP_InStream::IsEOF (   )  const [virtual, inherited]

Returns true if the stream has reached the end. Exceptions: none  Returns: bool const True if the stream is at the end. Reimplemented in CP_SocketInStream.

bool CP_InStream::HasTaggedData (   )  const [inherited]

Returns true if the data type is written before each elemement. This is intended in debugging the stream data since it increases the size of the resulting stream. Exceptions: none  Returns: bool const True, if the stream has tags before each data element.

SInt32 CP_InStream::GetTag (   )  [inherited]

Reads the tag before a data element if the streamed data has tagged data. Exceptions: none  Returns: SInt32 The tag being read.

void CP_InStream::ReadHeader (   )  [protected, virtual, inherited]

Reads the header portion of our stream. Exceptions: none  Returns: void

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Member Data Documentation

const CP_PtrBlock* CP_PtrBlockInStream::fPtrBlock [protected]

UInt32 CP_PtrBlockInStream::fCurrentPosition [protected]

The CP_PtrBlock object we are reading from.

bool CP_InStream::fHasReadHeader [protected, inherited]

bool CP_InStream::fNeedsByteSwap [protected, inherited]

Flag to indicate if we have read the header.

UInt16 CP_InStream::fCPLATStreamVersion [protected, inherited]

Flag to indicate if we need to byte swap the data.

bool CP_InStream::fHasTaggedData [protected, inherited]

CPLAT stream version used to write this stream.

bool CP_InStream::fHasHeader [protected, inherited]

Flag to indicate if the data has its type written out also.

char CP_InStream::fDesiredEdian [protected, inherited]

Flag to indicate if we are want to read data not created by this framework and therefore won't have a correct header.

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The documentation for this class was generated from the following files:

• CP_PtrBlockStream.h
• CP_PtrBlockStream.cpp

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