hash.h

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/*                                      -*-C++-*-
    Classified Ads is Copyright (c) Antti Jarvinen 2013.

    This file is part of Classified Ads.

    Classified Ads is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    Classified Ads is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with Classified Ads; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#ifndef HASH_H
#define HASH_H

#include <QSslCertificate>


class Hash {
public:
    const static int KNumberOfIntsInHash = 5 ;
    Hash() ;
    Hash(const quint32 aHash160bits[KNumberOfIntsInHash]) ;
    Hash(const quint32 aBits1,
         const quint32 aBits2,
         const quint32 aBits3,
         const quint32 aBits4,
         const quint32 aBits5) ;
    Hash(const unsigned char aDigest[KNumberOfIntsInHash * 4]) ;
    Hash(const char* aHexString, int aHexStringLen) ;
    Hash(const QSslCertificate& aSslCert) ;

    void fromString(const unsigned char *aBuf) ;

    QString toString() const ;

    void fromQVariant(const QVariant& aQVariantHashValue) ;

    QVariant toQVariant() const ;

    void calculate(const QByteArray& aBuf) ;
    bool operator== (const Hash& aHashToCompare) const ;
    bool operator!= (const Hash& aHashToCompare) const ;
    bool operator< (const Hash& aHashToCompare) const ;
    bool operator> (const Hash& aHashToCompare) const ;

    Hash& operator= (const Hash& aHashToSubstitute) ;

    Hash distanceFrom (const Hash& aHash) ;

    Hash operator-(const Hash& aToBeSubstracted) const ;
    Hash operator+(const Hash& aToBeAdded) const ;

private:
    void setFromCharArray(const unsigned char aDigest[KNumberOfIntsInHash * 4]) ;
public:
    quint32 iHash160bits[KNumberOfIntsInHash] ;
} ;
#endif