prosody
29b24a4028ed
util/uuid.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/uuid.lua @ 4961:29b24a4028ed

sessionmanager: Have session.send() of a retired session return false to indicate failure
author Matthew Wild <mwild1@gmail.com>
date Sun, 22 Jul 2012 16:50:14 +0100
parent 2957:805b067cd13e
child 5776:bd0ff8ae98a8
child 7010:001b3cff4ed8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1523
841d61be198f Remove version number from copyright headers
Matthew Wild <mwild1@gmail.com>
parents: 1304
diff changeset
1 -- Prosody IM
2923
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 1523
diff changeset
2 -- Copyright (C) 2008-2010 Matthew Wild
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 1523
diff changeset
3 -- Copyright (C) 2008-2010 Waqas Hussain
519
cccd610a0ef9 Insert copyright/license headers
Matthew Wild <mwild1@gmail.com>
parents: 145
diff changeset
4 --
758
b1885732e979 GPL->MIT!
Matthew Wild <mwild1@gmail.com>
parents: 615
diff changeset
5 -- This project is MIT/X11 licensed. Please see the
b1885732e979 GPL->MIT!
Matthew Wild <mwild1@gmail.com>
parents: 615
diff changeset
6 -- COPYING file in the source package for more information.
519
cccd610a0ef9 Insert copyright/license headers
Matthew Wild <mwild1@gmail.com>
parents: 145
diff changeset
7 --
cccd610a0ef9 Insert copyright/license headers
Matthew Wild <mwild1@gmail.com>
parents: 145
diff changeset
8
cccd610a0ef9 Insert copyright/license headers
Matthew Wild <mwild1@gmail.com>
parents: 145
diff changeset
9
44
80d2ade0fd69 Add "uuid" library and make sessionmanager use this.
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
10 local m_random = math.random;
762
5ae018c016ba util.uuid: Return a string, not a number. Looked so innocent.
Matthew Wild <mwild1@gmail.com>
parents: 760
diff changeset
11 local tostring = tostring;
1302
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
12 local os_time = os.time;
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
13 local os_clock = os.clock;
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
14 local sha1 = require "util.hashes".sha1;
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
15
44
80d2ade0fd69 Add "uuid" library and make sessionmanager use this.
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
16 module "uuid"
80d2ade0fd69 Add "uuid" library and make sessionmanager use this.
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
17
1302
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
18 local last_uniq_time = 0;
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
19 local function uniq_time()
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
20 local new_uniq_time = os_time();
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
21 if last_uniq_time >= new_uniq_time then new_uniq_time = last_uniq_time + 1; end
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
22 last_uniq_time = new_uniq_time;
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
23 return new_uniq_time;
44
80d2ade0fd69 Add "uuid" library and make sessionmanager use this.
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
24 end
80d2ade0fd69 Add "uuid" library and make sessionmanager use this.
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
25
1302
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
26 local function new_random(x)
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
27 return sha1(x..os_clock()..tostring({}), true);
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
28 end
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
29
1303
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
30 local buffer = new_random(uniq_time());
1304
0a49759464e0 util.uuid: Added function seed(string) to allow further seeding of the PRNG
Waqas Hussain <waqas20@gmail.com>
parents: 1303
diff changeset
31 local function _seed(x)
0a49759464e0 util.uuid: Added function seed(string) to allow further seeding of the PRNG
Waqas Hussain <waqas20@gmail.com>
parents: 1303
diff changeset
32 buffer = new_random(buffer..x);
0a49759464e0 util.uuid: Added function seed(string) to allow further seeding of the PRNG
Waqas Hussain <waqas20@gmail.com>
parents: 1303
diff changeset
33 end
1303
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
34 local function get_nibbles(n)
2957
805b067cd13e util.uuid: Use a local instead of a global.
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
35 if #buffer < n then _seed(uniq_time()); end
1303
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
36 local r = buffer:sub(0, n);
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
37 buffer = buffer:sub(n+1);
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
38 return r;
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
39 end
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
40 local function get_twobits()
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
41 return ("%x"):format(get_nibbles(1):byte() % 4 + 8);
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
42 end
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
43
1302
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
44 function generate()
1303
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
45 -- generate RFC 4122 complaint UUIDs (version 4 - random)
2170e2c0d57a util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Waqas Hussain <waqas20@gmail.com>
parents: 1302
diff changeset
46 return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12);
1302
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
47 end
1304
0a49759464e0 util.uuid: Added function seed(string) to allow further seeding of the PRNG
Waqas Hussain <waqas20@gmail.com>
parents: 1303
diff changeset
48 seed = _seed;
1302
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
49
4561c6d95339 util.uuid: More uniqueness!
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
50 return _M;