guid.h

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/*
 * Copyright 2019 GridGain Systems, Inc. and Contributors.
 *
 * Licensed under the GridGain Community Edition License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.gridgain.com/products/software/community-edition/gridgain-community-edition-license
 *
 * 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.
 */
 
#ifndef _IGNITE_GUID
#define _IGNITE_GUID
 
#include <stdint.h>
#include <iomanip>
 
#include <ignite/common/common.h>
 
namespace ignite
{
    class IGNITE_IMPORT_EXPORT Guid
    {
    public:
        Guid();
 
        Guid(int64_t most, int64_t least);
 
        int64_t GetMostSignificantBits() const;
 
        int64_t GetLeastSignificantBits() const;
 
        int32_t GetVersion() const;
 
        int32_t GetVariant() const;
 
        int32_t GetHashCode() const;
 
        friend bool IGNITE_IMPORT_EXPORT operator== (const Guid& val1, const Guid& val2);
 
        int64_t Compare(const Guid& other) const;
 
        friend bool IGNITE_IMPORT_EXPORT operator==(const Guid& val1, const Guid& val2);
 
        friend bool IGNITE_IMPORT_EXPORT operator!=(const Guid& val1, const Guid& val2);
 
        friend bool IGNITE_IMPORT_EXPORT operator<(const Guid& val1, const Guid& val2);
 
        friend bool IGNITE_IMPORT_EXPORT operator<=(const Guid& val1, const Guid& val2);
 
        friend bool IGNITE_IMPORT_EXPORT operator>(const Guid& val1, const Guid& val2);
 
        friend bool IGNITE_IMPORT_EXPORT operator>=(const Guid& val1, const Guid& val2);
 
    private:
        int64_t most;  
 
        int64_t least; 
    };
 
    template<typename C>
    ::std::basic_ostream<C>& operator<<(std::basic_ostream<C>& os, const Guid& guid)
    {
        uint32_t part1 = static_cast<uint32_t>(guid.GetMostSignificantBits() >> 32);
        uint16_t part2 = static_cast<uint16_t>(guid.GetMostSignificantBits() >> 16);
        uint16_t part3 = static_cast<uint16_t>(guid.GetMostSignificantBits());
        uint16_t part4 = static_cast<uint16_t>(guid.GetLeastSignificantBits() >> 48);
        uint64_t part5 = guid.GetLeastSignificantBits() & 0x0000FFFFFFFFFFFFU;
 
        os  << std::hex 
            << std::setfill<C>('0') << std::setw(8)  << part1 << '-'
            << std::setfill<C>('0') << std::setw(4)  << part2 << '-'
            << std::setfill<C>('0') << std::setw(4)  << part3 << '-'
            << std::setfill<C>('0') << std::setw(4)  << part4 << '-'
            << std::setfill<C>('0') << std::setw(12) << part5 << std::dec;
 
        return os;
    }
 
    template<typename C>
    ::std::basic_istream<C>& operator>>(std::basic_istream<C>& is, Guid& guid)
    {
        uint64_t parts[5];
 
        C delim;
 
        for (int i = 0; i < 4; ++i)
        {
            is >> std::hex >> parts[i] >> delim;
 
            if (delim != static_cast<C>('-'))
                return is;
        }
 
        is >> std::hex >> parts[4];
 
        guid = Guid((parts[0] << 32) | (parts[1] << 16) | parts[2], (parts[3] << 48) | parts[4]);
 
        return is;
    }
}
 
#endif