guid.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

#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);
    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() & 0x0000FFFFFFFFFFFFULL;

        os  << std::setfill<C>('0') << std::setw(8)  << std::hex << part1 << '-'
            << std::setfill<C>('0') << std::setw(4)  << std::hex << part2 << '-'
            << std::setfill<C>('0') << std::setw(4)  << std::hex << part3 << '-'
            << std::setfill<C>('0') << std::setw(4)  << std::hex << part4 << '-'
            << std::setfill<C>('0') << std::setw(12) << std::hex << part5;

        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