decimal128.hpp

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// Copyright 2009-present MongoDB, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#pragma once
 
#include <bsoncxx/v1/decimal128-fwd.hpp> // IWYU pragma: export
 
//
 
#include <bsoncxx/v1/detail/prelude.hpp>
 
#include <bsoncxx/v1/config/export.hpp>
#include <bsoncxx/v1/stdx/string_view.hpp>
 
#include <cstdint>
#include <string>
#include <system_error>
#include <type_traits>
 
namespace bsoncxx {
namespace v1 {

class decimal128 {
   private:
    std::uint64_t _high = 0u;
    std::uint64_t _low = 0u;
 
   public:
    decimal128() = default;

    decimal128(std::uint64_t high, std::uint64_t low) : _high{high}, _low{low} {}

    explicit BSONCXX_ABI_EXPORT_CDECL() decimal128(v1::stdx::string_view str);

    BSONCXX_ABI_EXPORT_CDECL(std::string) to_string() const;

    std::uint64_t high() const {
        return _high;
    }

    std::uint64_t low() const {
        return _low;
    }

    friend bool operator==(decimal128 const& lhs, decimal128 const& rhs) {
        return lhs._high == rhs._high && lhs._low == rhs._low;
    }
 
    friend bool operator!=(decimal128 const& lhs, decimal128 const& rhs) {
        return !(lhs == rhs);
    }


    enum class errc {
        zero,                  
        empty_string,          
        invalid_string_length, 
        invalid_string_data,   
    };

    static BSONCXX_ABI_EXPORT_CDECL(std::error_category const&) error_category();

    friend std::error_code make_error_code(errc v) {
        return {static_cast<int>(v), error_category()};
    }
};
 
} // namespace v1
} // namespace bsoncxx
 
template <>
struct std::is_error_code_enum<bsoncxx::v1::decimal128::errc> : true_type {};
 
#include <bsoncxx/v1/detail/postlude.hpp>