uuid.h

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/*
BSD 3-Clause License
 
Copyright (c) 2022, Stable Cloud Computing, Inc.
 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
 
1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
 
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   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
 
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   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.
 
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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*/
#ifndef _SCC_CRYPTO_UUID_H
#define _SCC_CRYPTO_UUID_H
 
#include <string>
#include <ostream>
#include <cstring>
 
namespace scc::crypto {
 
class Uuid
{
    std::string m_uuid;
    void assign(const std::string&);
 
public:
    Uuid()
    {
        generate();
    }
 
    virtual ~Uuid()
    {
        explicit_bzero(m_uuid.data(), m_uuid.size());
    }
    Uuid(Uuid&&) = delete;      // move not allowed
    Uuid(Uuid& b)
    {
        m_uuid = b.m_uuid;
    }
    Uuid& operator =(const Uuid& b)
    {
        m_uuid = b.m_uuid;
        return *this;
    }
    Uuid& operator =(const std::string& b)
    {
        assign(b);
        return *this;
    }
 
    Uuid(const std::string& s)
    {
        assign(s);
    }
 
    std::string generate();
 
    operator std::string() const { return m_uuid; }
 
    std::string val() const { return m_uuid; }
 
    bool operator ==(const Uuid &b) const
    {
        return m_uuid == b.m_uuid;
    }
    bool operator !=(const Uuid &b) const
    {
        return m_uuid != b.m_uuid;
    }
 
    static const std::string zero;
};
 
void PrintTo(const Uuid&, std::ostream*);
 
}
 
std::ostream& operator <<(std::ostream&, const scc::crypto::Uuid&);
 
#endif