XrdCksCalccrc32 Class Reference

#include <XrdCksCalccrc32.hh>

Inheritance diagram for XrdCksCalccrc32:

Collaboration diagram for XrdCksCalccrc32:

Public Member Functions
	XrdCksCalccrc32 ()
virtual	~XrdCksCalccrc32 ()
bool	Combinable () override
const char *	Combine (const char *Cksum, int DLen) override
	Combine checksum into current checksum.
const char *	Combine (const char *Cksum1, const char *Cksum2, int DLen) override
	Combine two checksums and return result.
char *	Final () override
	Final checksum.
void	Init () override
	Initialize.
XrdCksCalc *	New () override
const char *	Type (int &csSz) override
void	Update (const char *Buff, int BLen) override
	Update current checksum.
Public Member Functions inherited from XrdCksCalc
	XrdCksCalc ()
	Constructor.
virtual	~XrdCksCalc ()
	Destructor.
virtual char *	Calc (const char *Buff, int BLen)
virtual char *	Current ()
virtual void	Recycle ()
	Recycle the checksum object as it is no longer needed. A default is given.

Detailed Description

Definition at line 37 of file XrdCksCalccrc32.hh.

Constructor & Destructor Documentation

XrdCksCalccrc32()

XrdCksCalccrc32::XrdCksCalccrc32 ( )

inline

Definition at line 57 of file XrdCksCalccrc32.hh.

{Init();}

References Init().

Referenced by New().

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~XrdCksCalccrc32()

virtual XrdCksCalccrc32::~XrdCksCalccrc32 ( )

inlinevirtual

Definition at line 58 of file XrdCksCalccrc32.hh.

{}

Member Function Documentation

Combinable()

bool XrdCksCalccrc32::Combinable ( )

inlineoverridevirtual

Indicate whether or not checksums are combinable for this checksum.

Returns

True if checksums are combinable, false otherwise.

Note

The default is false as combinable checksums are possible for only a few checksum algorithms (e.g. adler and crc). Even then, combining checksums is an optimization not a neccisity.

Reimplemented from XrdCksCalc.

Definition at line 41 of file XrdCksCalccrc32.hh.

{return true;}

Combine() [1/2]

const char * XrdCksCalccrc32::Combine ( const char * Cksum, int DLen )

overridevirtual

Combine checksum into current checksum.

Reimplemented from XrdCksCalc.

Definition at line 69 of file XrdCksCalccrc32.cc.

{
   uint32_t crc2 = getCS(Cksum);
 
   pCheckSumTmp = pCheckSum = crc32_combine(pCheckSum, crc2, (z_off_t)DLen);
 
#ifndef Xrd_Big_Endian
   pCheckSumTmp = ntohl(pCheckSumTmp);
#endif
 
   return (char *)&pCheckSumTmp;
}

Combine() [2/2]

const char * XrdCksCalccrc32::Combine ( const char * Cksum1, const char * Cksum2, int DLen )

overridevirtual

Combine two checksums and return result.

Reimplemented from XrdCksCalc.

Definition at line 85 of file XrdCksCalccrc32.cc.

{
   uint32_t crc1 = getCS(Cksum1), crc2 = getCS(Cksum2);
 
   pCheckSumTmp = crc32_combine(crc1, crc2, (z_off_t)DLen);
 
#ifndef Xrd_Big_Endian
   pCheckSumTmp = ntohl(pCheckSumTmp);
#endif
 
   return (char *)&pCheckSumTmp;
}

Final()

char * XrdCksCalccrc32::Final ( )

overridevirtual

Final checksum.

Implements XrdCksCalc.

Definition at line 102 of file XrdCksCalccrc32.cc.

{
  pCheckSumTmp = pCheckSum;
 
#ifndef Xrd_Big_Endian
  pCheckSumTmp = ntohl(pCheckSumTmp);
#endif
 
  return (char *)&pCheckSumTmp;
}

Init()

void XrdCksCalccrc32::Init ( )

overridevirtual

Initialize.

Implements XrdCksCalc.

Definition at line 116 of file XrdCksCalccrc32.cc.

{
  pCheckSum = crc32( 0L, Z_NULL, 0 );
}

Referenced by XrdCksCalccrc32().

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New()

XrdCksCalc * XrdCksCalccrc32::New ( )

inlineoverridevirtual

Get a new instance of the underlying checksum calculation object.

Returns

the checksum calculation object.

Implements XrdCksCalc.

Definition at line 51 of file XrdCksCalccrc32.hh.

{return (XrdCksCalc *)new XrdCksCalccrc32;}

References XrdCksCalc::XrdCksCalc(), and XrdCksCalccrc32().

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Type()

const char * XrdCksCalccrc32::Type ( int & csSize )

inlineoverridevirtual

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.

Implements XrdCksCalc.

Definition at line 55 of file XrdCksCalccrc32.hh.

{csSz = sizeof(pCheckSum); return "crc32";}

Update()

void XrdCksCalccrc32::Update ( const char * Buff, int BLen )

overridevirtual

Update current checksum.

Implements XrdCksCalc.

Definition at line 124 of file XrdCksCalccrc32.cc.

{
  pCheckSum = crc32( pCheckSum, (const Bytef*)Buff, BLen );
}

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

• XrdCksCalccrc32.hh
• XrdCksCalccrc32.cc