XrdCksCalc Class Reference

#include <XrdCksCalc.hh>

List of all members.

Public Member Functions
virtual char *	Calc (const char *Buff, int BLen)
virtual char *	Current ()
virtual char *	Final ()=0
virtual void	Init ()=0
virtual XrdCksCalc *	New ()=0
virtual void	Recycle ()
	Recycle the checksum object as it is no longer needed. A default is given.
virtual const char *	Type (int &csSize)=0
virtual void	Update (const char *Buff, int BLen)=0
	XrdCksCalc ()
	Constructor.
virtual	~XrdCksCalc ()
	Destructor.

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Detailed Description

This class defines the interface to a checksum computation. When this class is used to define a plugin computation, the initial XrdCksCalc computation object is created by the XrdCksCalcInit() function defined at the end of this file.

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Constructor & Destructor Documentation

XrdCksCalc::XrdCksCalc

(

)

[inline]

Constructor.

virtual XrdCksCalc::~XrdCksCalc

(

)

[inline, virtual]

Destructor.

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Member Function Documentation

virtual char* XrdCksCalc::Calc	(	const char *	Buff,
		int	BLen
	)			[inline, virtual]

Calculate a one-time checksum. The obvious default implementation is provided and assumes that Init() may be called more than once.

Parameters:

	Buff	-> Data to be checksummed.
	BLen	-> Length of the data in Buff.

Returns:

the checksum value in binary format. The pointer to the value becomes invalid once the associated object is deleted.

virtual char* XrdCksCalc::Current

(

)

[inline, virtual]

Get the current binary checksum value (defaults to final). However, the final checksum result is not affected.

Returns:

the checksum value in binary format. The pointer to the value becomes invalid once the associated object is deleted.

virtual char* XrdCksCalc::Final

(

)

[pure virtual]

Get the actual checksum in binary format.

Returns:

the checksum value in binary format. The pointer to the value becomes invalid once the associated object is deleted.

virtual void XrdCksCalc::Init

(

)

[pure virtual]

Initializes data structures (must be called by constructor). This is always called to reuse the object for a new checksum.

virtual XrdCksCalc* XrdCksCalc::New

(

)

[pure virtual]

Get a new instance of the underlying checksum calculation object.

Returns:

the checksum calculation object.

virtual void XrdCksCalc::Recycle

(

)

[inline, virtual]

Recycle the checksum object as it is no longer needed. A default is given.

virtual const char* XrdCksCalc::Type

(

int &

csSize

)

[pure virtual]

Get the checksum object algorithm name and the number bytes (i.e. size) required for the checksum value.

Parameters:

csSize

-> Parameter to hold the size of the checksum value.

Returns:

the checksum algorithm's name. The name persists event after the checksum object is deleted.

virtual void XrdCksCalc::Update	(	const char *	Buff,
		int	BLen
	)			[pure virtual]

Compute a running checksum. This method may be called repeatedly for data segments; with Final() returning the full checksum.

Parameters:

	Buff	-> Data to be checksummed.
	BLen	-> Length of the data in Buff.

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

• XrdCksCalc.hh

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