Simple configuration file parser, using a regex.

configparser.lua

configfile = [[
ip = 127.0.0.1
tcp port = 10
udp port = 11
lan only = false
]]

config_regex = "%s*(.-)%s*=%s*(.-)%s*\n"

function parseString( data )
    local result = {}
    
	for key, value in configfile:gmatch(regex) do
		if not (tonumber( value )  == nil) then
			result[key] = tonumber( value )
		elseif value:lower() == "false" then
			result[key] = false
		elseif value:lower() == "true" then
			result[key] = true
		else
			result[key] = value
		end
	end
	
	return result
end

for key, value in pairs( parseString(configfile) ) do print(key, value) end