Seid

Serial elements in a LSS are uniquely identified by a 64 bit Serial Element Identifier (Seid).

A null Seid contains zeros for both the low and high 32 bits. A null Seid is never used for a serial element in the LSS.

// Low 32 bits and high 32 bits of a 64 bit Serial element Id (Seid)
typedef uint32 SeidPart;
typedef SeidPart SeidHigh;
typedef SeidPart SeidLow;

class Seid
{
public:
    Seid();
    Seid(SeidLow low,SeidHigh high);
    explicit Seid(uint64 v);

    bool IsNull() const;
    void SetNull();

    SeidLow Low() const;
    void SetLow(SeidLow low);

    SeidHigh High() const;
    void SetHigh(SeidHigh high);

    uint64 Value() const;
    void SetValue(uint64 value);
private:
    [ implementation ]
};

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Seid()

Default constructor initialises the Seid with the null value.

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Seid(SeidLow low,SeidHigh high)

Constructor initialises the Seid with the given low and high 32 bit values.

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explicit Seid(uint64 v)

Constructor initialises the Seid with the given unsigned 64 bit value.

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bool IsNull()

Returns true if the Seid is null.

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void SetNull()

Set the Seid to the null value.

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SeidLow Low() const

Get the low 32 bit value of the Seid

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void SetLow(SeidLow low)

Set the low 32 bit value of the Seid

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SeidHigh High() const

Get the high 32 bit value of the Seid

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void SetHigh(SeidHigh high)

Set the high 32 bit value of the Seid

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uint64 Value() const

Get the value of the Seid as an unsigned 64 bit value.

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void SetValue(uint64 value)

Set the Seid with the given unsigned 64 bit value.

Comparisons on Seids

The 6 comparison operations == != < <= > >= are available on Seids and are equivalent to the corresponding comparisons as unsigned 64 bit numbers.

Writing of a Seid to/from an Archive

A Seid is serialised as a sequence of 8 bytes, starting with the least significant byte (i.e. little-endian [] byte order).

Archive& operator<<(Archive& ar, Seid x);
InputArchive operator>>(InputArchive ar, Seid& x);