Thu, 04 Jun 2009 18:04:26 +0500
util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
util/uuid.lua | file | annotate | diff | comparison | revisions |
--- a/util/uuid.lua Thu Jun 04 17:41:55 2009 +0500 +++ b/util/uuid.lua Thu Jun 04 18:04:26 2009 +0500 @@ -27,8 +27,22 @@ return sha1(x..os_clock()..tostring({}), true); end +local buffer = new_random(uniq_time()); +local function get_nibbles(n) + if #buffer < n then + buffer = new_random(buffer..uniq_time()); + end + local r = buffer:sub(0, n); + buffer = buffer:sub(n+1); + return r; +end +local function get_twobits() + return ("%x"):format(get_nibbles(1):byte() % 4 + 8); +end + function generate() - return new_random(uniq_time()); + -- generate RFC 4122 complaint UUIDs (version 4 - random) + return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12); end return _M;