80 lines
3.0 KiB
C++
80 lines
3.0 KiB
C++
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/*
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* This file is part of the Flowee project
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* Copyright (C) 2009-2010 Satoshi Nakamoto
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* Copyright (C) 2009-2015 The Bitcoin Core developers
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* Copyright (C) 2021 Tom Zander <tom@flowee.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FLOWEE_SCRIPT_FASTBIGNUM_H
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#define FLOWEE_SCRIPT_FASTBIGNUM_H
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#include "script.h"
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#include <optional>
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#include <variant>
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class FastBigNum
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{
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public:
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FastBigNum(const std::vector<unsigned char> &vch, bool fRequireMinimal, size_t maxIntegerSize);
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explicit FastBigNum(const CScriptNum &value);
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explicit FastBigNum(const ScriptBigNum &value);
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static FastBigNum fromIntUnchecked(int64_t value, bool useBigInt = false);
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bool usesNative() const;
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int32_t getint32() const;
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std::optional<int64_t> getint64() const;
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std::vector<unsigned char> getvch() const;
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size_t absValNumBits() const;
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bool safeAddInPlace(const FastBigNum &rhs);
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bool safeIncr();
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bool safeSubInPlace(const FastBigNum &rhs);
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bool safeDecr();
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bool safeMulInPlace(const FastBigNum &rhs);
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FastBigNum& operator/=(const FastBigNum &rhs);
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FastBigNum& operator%=(const FastBigNum &rhs);
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FastBigNum& negate();
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bool checkedLeftShift(unsigned bitcount);
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bool checkedRightShift(unsigned bitcount);
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bool isZero() const;
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int compare(const FastBigNum &rhs) const;
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bool operator==(const FastBigNum &rhs) const { return compare(rhs) == 0; }
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bool operator!=(const FastBigNum &rhs) const { return compare(rhs) != 0; }
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bool operator<(const FastBigNum &rhs) const { return compare(rhs) < 0; }
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bool operator<=(const FastBigNum &rhs) const { return compare(rhs) <= 0; }
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bool operator>(const FastBigNum &rhs) const { return compare(rhs) > 0; }
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bool operator>=(const FastBigNum &rhs) const { return compare(rhs) >= 0; }
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bool operator==(int64_t rhs) const { return compare(FastBigNum::fromIntUnchecked(rhs)) == 0; }
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bool operator!=(int64_t rhs) const { return !(*this == rhs); }
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bool operator<(int64_t rhs) const { return compare(FastBigNum::fromIntUnchecked(rhs)) < 0; }
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bool operator<=(int64_t rhs) const { return compare(FastBigNum::fromIntUnchecked(rhs)) <= 0; }
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bool operator>(int64_t rhs) const { return compare(FastBigNum::fromIntUnchecked(rhs)) > 0; }
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bool operator>=(int64_t rhs) const { return compare(FastBigNum::fromIntUnchecked(rhs)) >= 0; }
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private:
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std::variant<CScriptNum, ScriptBigNum> m_value;
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ScriptBigNum asBigNum() const;
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};
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#endif
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