QuaZIP quazip-0-7-2
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Checksum interface. More...
#include <quazip/quachecksum32.h>
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(). |
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();
virtual quint32 QuaChecksum32::calculate | ( | const QByteArray & | data | ) | [pure virtual] |
Calculates the checksum for data.
data source data
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().
Implemented in QuaAdler32, and QuaCrc32.