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QuaChecksum32 Class Reference

Checksum interface. More...

`#include <quazip/quachecksum32.h>`

Inheritance diagram for QuaChecksum32:
[legend]

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