File

util/hex.lua @ 9104:e1ca373a7e09

util.pubsub: Tweak default affiliation of access models (fixes failing test) 11:56:59 MattJ> Someone who has the ability to subscribe does not have the "subscriber" affiliation until they actually subscribe, they just have the normal "none" affiliation (which has permission to subscribe) 11:58:05 MattJ> However if the access model is whitelist, then anyone not on the whitelist has an implicit negative affiliation, which we don't currently have, so I just named "restricted" 11:58:16 MattJ> Since it doesn't exist in any code yet, it has no permissions
author Matthew Wild <mwild1@gmail.com>
date Sat, 04 Aug 2018 12:00:46 +0100
parent 6802:442019e955dc
child 12355:a0ff5c438e9d
line wrap: on
line source

local s_char = string.char;
local s_format = string.format;
local s_gsub = string.gsub;
local s_lower = string.lower;

local char_to_hex = {};
local hex_to_char = {};

do
	local char, hex;
	for i = 0,255 do
		char, hex = s_char(i), s_format("%02x", i);
		char_to_hex[char] = hex;
		hex_to_char[hex] = char;
	end
end

local function to(s)
	return (s_gsub(s, ".", char_to_hex));
end

local function from(s)
	return (s_gsub(s_lower(s), "%X*(%x%x)%X*", hex_to_char));
end

return { to = to, from = from }