UUID generation functions

I have built some UUID generation functions using the library at 
<http://www.ossp.org/pkg/lib/uuid/>.  This should cover all the usual ways to 
do it, and it also provides some special constants that could be useful.

I have attached the code, but the code is actually against 8.2 with uuid 
defined as a domain over text, because I needed this functionality in a 
current project.  I will adjust the code for the real uuid type in 8.3 if 
wanted.

What should I do with this?  contrib?

Example output:

test=# select uuid_nil();              uuid_nil
--------------------------------------00000000-0000-0000-0000-000000000000
(1 row)

test=# select uuid_ns_dns();            uuid_ns_dns
--------------------------------------6ba7b810-9dad-11d1-80b4-00c04fd430c8
(1 row)

test=# select uuid_ns_url();            uuid_ns_url
--------------------------------------6ba7b811-9dad-11d1-80b4-00c04fd430c8
(1 row)

test=# select uuid_ns_oid();            uuid_ns_oid
--------------------------------------6ba7b812-9dad-11d1-80b4-00c04fd430c8
(1 row)

test=# select uuid_ns_x500();            uuid_ns_x500
--------------------------------------6ba7b814-9dad-11d1-80b4-00c04fd430c8
(1 row)

test=# select uuid_make_v1();            uuid_make_v1
--------------------------------------ca06523c-e826-11db-8418-001aa008dc89
(1 row)

test=# select uuid_make_v1mc();           uuid_make_v1mc
--------------------------------------cb9df960-e826-11db-bbd1-03614e7a3ea6
(1 row)

test=# select uuid_make_v3(uuid_ns_url(), 'http://www.postgresql.org');            uuid_make_v3
--------------------------------------cf16fe52-3365-3a1f-8572-288d8d2aaa46
(1 row)

test=# select uuid_make_v4();            uuid_make_v4
--------------------------------------ca16279c-f15d-4a33-a066-b657b338ccd8
(1 row)

test=# select uuid_make_v5(uuid_ns_url(), 'http://www.postgresql.org');            uuid_make_v5
--------------------------------------e1ee1ad4-cd4e-5889-962a-4f605a68d94e
(1 row)

-- 
Peter Eisentraut
http://developer.postgresql.org/~petere/