BigNumber.h

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/*
 * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program 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 General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _AUTH_BIGNUMBER_H
#define _AUTH_BIGNUMBER_H

#include <memory>
#include "Define.h"
#include <string>

struct bignum_st;

class TC_COMMON_API BigNumber
{
 public:
 BigNumber();
 BigNumber(BigNumber const& bn);
 BigNumber(uint32);
 ~BigNumber();

 void SetDword(uint32);
 void SetQword(uint64);
 void SetBinary(uint8 const* bytes, int32 len);
 void SetHexStr(char const* str);

 void SetRand(int32 numbits);

 BigNumber& operator=(BigNumber const& bn);

 BigNumber operator+=(BigNumber const& bn);
 BigNumber operator+(BigNumber const& bn)
 {
 BigNumber t(*this);
 return t += bn;
 }

 BigNumber operator-=(BigNumber const& bn);
 BigNumber operator-(BigNumber const& bn)
 {
 BigNumber t(*this);
 return t -= bn;
 }

 BigNumber operator*=(BigNumber const& bn);
 BigNumber operator*(BigNumber const& bn)
 {
 BigNumber t(*this);
 return t *= bn;
 }

 BigNumber operator/=(BigNumber const& bn);
 BigNumber operator/(BigNumber const& bn)
 {
 BigNumber t(*this);
 return t /= bn;
 }

 BigNumber operator%=(BigNumber const& bn);
 BigNumber operator%(BigNumber const& bn)
 {
 BigNumber t(*this);
 return t %= bn;
 }

 bool IsZero() const;
 bool IsNegative() const;

 BigNumber ModExp(BigNumber const& bn1, BigNumber const& bn2);
 BigNumber Exp(BigNumber const&);

 int32 GetNumBytes(void);

 struct bignum_st *BN() { return _bn; }

 uint32 AsDword();

 std::unique_ptr<uint8[]> AsByteArray(int32 minSize = 0, bool littleEndian = true);

 std::string AsHexStr() const;
 std::string AsDecStr() const;

 private:
 struct bignum_st *_bn;

};
#endif