mirror of
https://github.com/martravi/wiiqt.git
synced 2024-11-15 13:55:14 +01:00
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
|
#ifndef QUACHECKSUM32_H
|
||
|
|
#define QUACHECKSUM32_H
|
||
|
|
|
||
|
|
#include <QByteArray>
|
||
|
|
|
||
|
|
/// Checksum interface.
|
||
|
|
/** \class QuaChecksum32 quachecksum32.h <quazip/quachecksum32.h>
|
||
|
|
* This is an interface for 32 bit checksums.
|
||
|
|
* Classes implementing this interface can calcunate a certin
|
||
|
|
* checksum in a single step:
|
||
|
|
* \code
|
||
|
|
* QChecksum32 *crc32 = new QuaCrc32();
|
||
|
|
* rasoult = crc32->calculate(data);
|
||
|
|
* \endcode
|
||
|
|
* or by streaming the data:
|
||
|
|
* \code
|
||
|
|
* 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();
|
||
|
|
* \endcode
|
||
|
|
*/
|
||
|
|
class QuaChecksum32
|
||
|
|
{
|
||
|
|
|
||
|
|
public:
|
||
|
|
///Calculates the checksum for data.
|
||
|
|
/** \a data source data
|
||
|
|
* \return data checksum
|
||
|
|
*
|
||
|
|
* This function has no efect on the value returned by value().
|
||
|
|
*/
|
||
|
|
virtual quint32 calculate(const QByteArray &data) = 0;
|
||
|
|
|
||
|
|
///Resets the calculation on a checksun for a stream.
|
||
|
|
virtual void reset() = 0;
|
||
|
|
|
||
|
|
///Updates the calculated checksum for the stream
|
||
|
|
/** \a buf next portion of data from the stream
|
||
|
|
*/
|
||
|
|
virtual void update(const QByteArray &buf) = 0;
|
||
|
|
|
||
|
|
///Value of the checksum calculated for the stream passed throw update().
|
||
|
|
/** \return checksum
|
||
|
|
*/
|
||
|
|
virtual quint32 value() = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif //QUACHECKSUM32_H
|