File

util/hex.lua @ 10639:08e3063eb1ac

stanza_router: Add once-per-routed-stanza event, pre-stanza
author Matthew Wild <mwild1@gmail.com>
date Wed, 05 Feb 2020 17:40:50 +0000
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 }