QuickHash Library C++ Interface

CCRC32::Final

void Final( unsigned char* pDest );
 

Parameters

 pDest

    [out] Pointer to the memory buffer that will receive the checksum.

Remarks

Call this member function to retrieve the checksum from the CCRC32 object. The checksum is retrieved in the memory buffer pointed by pDest. The size of the memory buffer pointed by pDest must be at least CCRC32::DIGESTSIZE bytes.

After the Final method is performed, the CCRC32 object is initialized for new calculations, as it would be constructed again.

Example

#include <fstream>
#include <QuickHash.h>

using namespace std;
using namespace QuickHash;

const unsigned int BUFF_SIZE = 1024;

int main()
{
    fstream file( "c:\\test.txt", ios::in | ios::binary );

    if( !file )
        return 1;

    unsigned char buff[ BUFF_SIZE ];
    unsigned char checksum[ CCRC32::DIGESTSIZE ];

    //Instantiate a CCRC32 object

    CCRC32 hash;

    //Calculate the checksum by calling Update for each block of the file

    while( !file.eof() )
    { 
        file.read( ( char* )buff, BUFF_SIZE );
        hash.Update( buff, file.gcount() );
    }

    //Do final changes and get the checksum

    hash.Final( checksum );

    //Use the checksum
    //...

    file.close();
    return 0;
}

 

 

CCRC32 Overview   |   Class Members   |   Useful Links   |   HashCalc

 

See Also    CCRC32::FinalHex, CCRC32::Update


 

 

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