QuaChecksum32 Class Reference

Checksum interface. More...

#include <quazip/quachecksum32.h>

Inheritance diagram for QuaChecksum32:

Collaboration diagram for QuaChecksum32:

Public Member Functions
virtual quint32	calculate (const QByteArray &data)=0
	Calculates the checksum for data. More...
virtual void	reset ()=0
	Resets the calculation on a checksun for a stream. More...
virtual void	update (const QByteArray &buf)=0
	Updates the calculated checksum for the stream. More...
virtual quint32	value ()=0
	Value of the checksum calculated for the stream passed throw update(). More...

Detailed Description

This is an interface for 32 bit checksums. Classes implementing this interface can calcunate a certin checksum in a single step:

QChecksum32 *crc32 = new QuaCrc32(); 
rasoult = crc32->calculate(data);

or by streaming the data:

QChecksum32 *crc32 = new QuaCrc32(); 
while(!fileA.atEnd())
    crc32->update(fileA.read(bufSize));
resoultA = crc32->value();
crc32->reset();
while(!fileB.atEnd())
    crc32->update(fileB.read(bufSize));
resoultB = crc32->value();

Definition at line 52 of file quachecksum32.h.

Member Function Documentation

virtual quint32 QuaChecksum32::calculate ( const QByteArray &  data )

pure virtual

data source data

Returns

data checksum

This function has no efect on the value returned by value().

Implemented in QuaAdler32, and QuaCrc32.

virtual void QuaChecksum32::reset ( )

pure virtual

Implemented in QuaAdler32, and QuaCrc32.

virtual void QuaChecksum32::update ( const QByteArray &  buf )

pure virtual

buf next portion of data from the stream

Implemented in QuaAdler32, and QuaCrc32.

virtual quint32 QuaChecksum32::value ( )

pure virtual

Returns

checksum

Implemented in QuaAdler32, and QuaCrc32.

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

• src/ckb/quazip/quachecksum32.h