On Oct 6, 2006, at 4:26 AM, Martin McCormick wrote:
Does anybody know what this notation is called? Does an
explanation of the algorithm exist in public so one can convert the
strings that are part of the call manager output in to the unsigned
ints that actually carry the right values?
An example of the string in question looks like:
"370A65FA-6965-4E40-A0DA-EC88DE6B"
That sure looks like a UUID, which may or may not encode valid time
information. See:
http://en.wikipedia.org/wiki/UUID
http://www.ietf.org/rfc/rfc4122.txt
4.1.4. Timestamp
The timestamp is a 60-bit value. For UUID version 1, this is
represented by Coordinated Universal Time (UTC) as a count of 100-
nanosecond intervals since 00:00:00.00, 15 October 1582 (the date of
Gregorian reform to the Christian calendar).
For systems that do not have UTC available, but do have the local
time, they may use that instead of UTC, as long as they do so
consistently throughout the system. However, this is not
recommended
since generating the UTC from local time only needs a time zone
offset.
For UUID version 3 or 5, the timestamp is a 60-bit value constructed
from a name as described in Section 4.3.
For UUID version 4, the timestamp is a randomly or pseudo-randomly
generated 60-bit value, as described in Section 4.4.
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| time_low |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| time_mid | time_hi_and_version |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|clk_seq_hi_res | clk_seq_low | node (0-1) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| node (2-5) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
--
-Chuck
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