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3d641d4062
Different versions of boost have different rules for what conversions from cpp_int to smaller intergers are allowed. We already had a function that worked with all supported versions, but it was not being use by lua. Signed-off-by: Rafael Ávila de Espíndola <espindola@scylladb.com> Message-Id: <20200104041028.215153-1-espindola@scylladb.com>
69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
/*
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* Copyright (C) 2015 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* Scylla 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 Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <boost/multiprecision/cpp_int.hpp>
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#include <ostream>
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#include "bytes.hh"
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uint64_t from_varint_to_integer(const boost::multiprecision::cpp_int& varint);
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class big_decimal {
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private:
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int32_t _scale;
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boost::multiprecision::cpp_int _unscaled_value;
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public:
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enum class rounding_mode {
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HALF_EVEN,
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};
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explicit big_decimal(sstring_view text);
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big_decimal() : big_decimal(0, 0) {}
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big_decimal(int32_t scale, boost::multiprecision::cpp_int unscaled_value)
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: _scale(scale), _unscaled_value(unscaled_value)
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{ }
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int32_t scale() const { return _scale; }
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const boost::multiprecision::cpp_int& unscaled_value() const { return _unscaled_value; }
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sstring to_string() const;
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int compare(const big_decimal& other) const;
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big_decimal& operator+=(const big_decimal& other);
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big_decimal& operator-=(const big_decimal& other);
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big_decimal operator+(const big_decimal& other) const;
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big_decimal operator-(const big_decimal& other) const;
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big_decimal div(const ::uint64_t y, const rounding_mode mode) const;
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friend bool operator<(const big_decimal& x, const big_decimal& y) { return x.compare(y) < 0; }
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friend bool operator<=(const big_decimal& x, const big_decimal& y) { return x.compare(y) <= 0; }
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friend bool operator==(const big_decimal& x, const big_decimal& y) { return x.compare(y) == 0; }
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friend bool operator!=(const big_decimal& x, const big_decimal& y) { return x.compare(y) != 0; }
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friend bool operator>=(const big_decimal& x, const big_decimal& y) { return x.compare(y) >= 0; }
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friend bool operator>(const big_decimal& x, const big_decimal& y) { return x.compare(y) > 0; }
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};
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inline std::ostream& operator<<(std::ostream& s, const big_decimal& v) {
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return s << v.to_string();
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}
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