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util/uuid.lua @ 12591:494577d883ff
util.table: Fix inaccurate comment
Probably a duplicate of the comment next to Lmove, recorded by mistake
Lpack can probably be removed at some point in the near future once we
are confident it is not used anywhere.
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 11 Jul 2022 20:02:10 +0200 |
parent | 12355:a0ff5c438e9d |
child | 12975:d10957394a3c |
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-- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local random = require "util.random"; local random_bytes = random.bytes; local hex = require "util.hex".encode; local m_ceil = math.ceil; local function get_nibbles(n) return hex(random_bytes(m_ceil(n/2))):sub(1, n); end local function get_twobits() return ("%x"):format(random_bytes(1):byte() % 4 + 8); end local function generate() -- 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 { get_nibbles=get_nibbles; generate = generate ; -- COMPAT seed = random.seed; };