QuaChecksum32 Class Reference

Checksum interface. More...

#include <quazip/quachecksum32.h>

Inheritance diagram for QuaChecksum32:

List of all members.

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

---

Detailed Description

Checksum interface.

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();

---

Member Function Documentation

virtual quint32 QuaChecksum32::calculate

(

const QByteArray &

data

)

[pure virtual]

Calculates the checksum for data.

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::update

(

const QByteArray &

buf

)

[pure virtual]

Updates the calculated checksum for the stream.

buf next portion of data from the stream

Implemented in QuaAdler32, and QuaCrc32.

virtual quint32 QuaChecksum32::value

(

)

[pure virtual]

Value of the checksum calculated for the stream passed throw update().

Returns:

checksum

Implemented in QuaAdler32, and QuaCrc32.

---

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

• quazip/quachecksum32.h