UID.h

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/*******************************************************************************
 *
 * Copyright (c) 2008-2010 Michael Schulze <mschulze@ivs.cs.uni-magdeburg.de>
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#ifndef __UID_h__
#define __UID_h__

#include <stdint.h>
#include "util/endianness.h"

struct UID {
private:
    union {
        uint64_t _value;
        uint8_t _tab[8];
    };

public:
    explicit UID() : _value(0) {}

    explicit UID(uint64_t uid) : _value(htonll(uid)) {}

    explicit UID(const uint8_t *uid) {
        do_init(reinterpret_cast<const uint8_t*>(uid));
    }

    UID(const char *uid) {
        do_init(reinterpret_cast<const uint8_t*>(uid));
    }

    bool operator < (const UID &a) const {
        return _value < a._value;
    }

    bool operator == (const UID &a) const {
        return _value == a._value;
    }

    uint8_t* tab() {
        return _tab;
    }
    const uint8_t* tab() const {
        return _tab;
    }

    uint64_t value() const {
        return ntohll(_value);
    }
private:
    void do_init(const uint8_t *uid) {
        _value = *reinterpret_cast<const uint64_t*>(uid);
    }
};

#endif /* __UID_h__ */