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odigos / etc / odigos-vmagent / instrumentations / python / uuid_extensions / __pycache__ / uuid7.cpython-311.pyc
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Implementation of UUID v7 per the October 2021 draft update
to RFC4122 from 2005:
https://datatracker.ietf.org/doc/html/draft-peabody-dispatch-new-uuid-format

Stephen Simmons, v0.1.0, 2021-12-27
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    UUID v7, following the proposed extension to RFC4122 described in
    https://www.ietf.org/id/draft-peabody-dispatch-new-uuid-format-02.html.
    All representations (string, byte array, int) sort chronologically,
    with a potential time resolution of 50ns (if the system clock
    supports this).

    Parameters
    ----------

    ns      - Optional integer with the whole number of nanoseconds
                since Unix epoch, to set the "as of" timestamp.
                As a special case, uuid7(ns=0) returns the zero UUID.

    as_type - Optional string to return the UUID in a different format.
                A uuid.UUID (version 7, variant 0x10) is returned unless
                this is one of 'str', 'int', 'hex' or 'bytes'.

    time_func - Set the time function, which must return integer
                nanoseconds since the Unix epoch, midnight on 1-Jan-1970.
                Defaults to time.time_ns(). This is exposed because
                time.time_ns() may have a low resolution on Windows.

    _last and _last_as_of - Used internally to trigger incrementing a
                sequence counter when consecutive calls have the same time
                values. The values [t1, t2, t3, seq] are described below.

    Returns
    -------

    A UUID object, or if as_type is specified, a string, int or
    bytes of length 16.

    Implementation notes
    --------------------

    The 128 bits in the UUID are allocated as follows:
    - 36 bits of whole seconds
    - 24 bits of fractional seconds, giving approx 50ns resolution
    - 14 bits of sequential counter, if called repeatedly in same time tick
    - 48 bits of randomness
    plus, at locations defined by RFC4122, 4 bits for the
    uuid version (0b111) and 2 bits for the uuid variant (0b10).

             0                   1                   2                   3
             0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
            +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    t1      |                 unixts (secs since epoch)                     |
            +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    t2/t3   |unixts |  frac secs (12 bits)  |  ver  |  frac secs (12 bits)  |
            +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    t4/rand |var|       seq (14 bits)       |          rand (16 bits)       |
            +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    rand    |                          rand (32 bits)                       |
            +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

    Indicative timings:
    - uuid.uuid4()            2.4us
    - uuid7()                 3.7us
    - uuid7(as_type='int')    1.6us
    - uuid7(as_type='str')    2.5us

    Examples
    --------

    >>> uuid7()
    UUID('061cb26a-54b8-7a52-8000-2124e7041024')

    >>> uuid7(0)
    UUID('00000000-0000-0000-0000-00000000000')

    >>> for fmt in ('bytes', 'hex', 'int', 'str', 'uuid', None):
    ...     print(fmt, repr(uuid7(as_type=fmt)))
    bytes b'¸þ|9€	jt…³»'
    hex '061cb8fe0f0b7c3980011863b956b758'
    int 8124504378724980906989670469352026642
    str '061cb8fe-0f0b-7c39-8003-d44a7ee0bdf6'
    uuid UUID('061cb8fe-0f0b-7c39-8004-0489578299f6')
    None UUID('061cb8fe-0f0f-7df2-8000-afd57c2bf446')
    Nrsl Ysééipééééÿ?i€éÚstrz>08xú-z>04xÚbigé`éPé@é0ÚintÚhexz>032xÚbytes)r)	rÚdivmodÚosÚurandomrÚ
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    Message indicating the timing precision from various time/clock
    functions that might be used for UUIDv7 generation.

    This tests time.time_ns(), time.perf_counter_ns()
    and datetime.datetime.utcnow converted to ns.

    A user-supplied timing function may also be provided.
    It must return the number of ns since the Unix Epoch
    (midnight at 1-Jan-1970).

    Note that time.time_ns() updates every 200us under Linux
    and potentially as infrequently as every 5ms under Windows.

    Usage:
    >>> check_timing_precision()
    # Under Linux
    time.time_ns()           has a timing precision of   221ns rather than 221ns (1,000 distinct samples in 0.00s)
    time.perf_counter_ns()   has a timing precision of   215ns rather than 215ns (1,000 distinct samples in 0.00s)
    datetime.datetime.utcnow has a timing precision of 1,046ns rather than 679ns (1,000 distinct samples in 0.00s)
    # Under Windows
    time.time_ns()           has a timing precision of 4,950,500ns rather than   709ns (705,068 samples of which 101 are distinct, in 0.50s)
    time.perf_counter_ns()   has a timing precision of       823ns rather than   823ns (1,000 samples of which 1,000 are distinct, in 0.00s)
    datetime.datetime.utcnow has a timing precision of 5,882,365ns rather than 2,812ns (177,792 samples of which 85 are distinct, in 0.50s)
    ztime.time_ns()ztime.perf_counter_ns()zdatetime.datetime.utcnowcó‚—ttj ¦« ¦«dz¦«S)Néʚ;)rÚdatetimeÚutcnowÚ	timestamp©r7r6ú<lambda>z(check_timing_precision.<locals>.<lambda>Ðs5€­SÝÔ×$Ò$Ñ&Ô&×0Ò0Ñ2Ô2°]ÑBñ.Dô.D€r7Nz
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    Recover the timestamp from a UUIDv7, passed in
    as a string, integer or a UUID object.

    If the UUID is not a version 7 UUID, either raise a ValueError
    or return None, depending on suppress_error.

    Usage:
    >>> uuid_to_datetime("1eb22fe4-3f0c-62b1-a88c-8dc55231702f")
    datetime.datetime(2020, 11, 10, 2, 41, 42, 182162)
    srr)ÚlengthÚ	byteorderrÚ)Úbaserééz>IHHHHIrrérriÿéérrr<lNz is a version z1 UUID, not v7 so we cannot extract the timestamp.)Ú
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