QuickHash Library

C++ Interface

CCRC16C::FinalHex

void FinalHex( char* pDest, bool bUpper = false );
 

Parameters

 pDest

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

 bUpper

    [in] Uppercase flag. If bUpper is false, the received checksum represents a lowercase string, otherwise it represents an uppercase string. 

Remarks

Call this member function to retrieve the checksum from the CCRC16C object. The checksum is retrieved as a null-terminated hexadecimal string in the text buffer pointed by pDest. The size of the text buffer pointed by pDest must be at least CCRC16C::HEXDIGESTSIZE characters.

After the FinalHex method is performed, the CCRC16C 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 ];
    char checksumhex[ CCRC16C::HEXDIGESTSIZE ]; //0 terminated

    //Instantiate a CCRC16C object

    CCRC16C hash;

    //Calculate the checksum incrementally block by block using Update

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

    //Do final changes and get the checksum in hex format

    hash.FinalHex( checksumhex );

    //Use the checksum
    //...

    file.close();

    return 0;
}

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See Also    CCRC16C::Final, CCRC16C::Update