pc_global = {
	pid_mid_map = {}, -- map packet id to pictochat message id (key = pid)
	msg = {}, -- pictochat messages (key = mid)
	mid = 0, -- current pictochat message id
}

function bits(idx, len)
	len = len or 1
	return ((2^len)-1) * 2^idx
end

function fix_addr_endianness(addr)
	local fixed = ByteArray.new()
	fixed:set_size(6)
	fixed:set_index(0, string.byte(addr, 2))
	fixed:set_index(1, string.byte(addr, 1))
	fixed:set_index(2, string.byte(addr, 4))
	fixed:set_index(3, string.byte(addr, 3))
	fixed:set_index(4, string.byte(addr, 6))
	fixed:set_index(5, string.byte(addr, 5))
	return fixed:raw()
end

room_user_addrs = { }
DS_SYSTEM_ADDRS = {
	["\x00\x00\x00\x00\x00\x00"] = "Null / empty",
	["\x03\x09\xbf\x00\x00\x00"] = "Multiplayer CMD",
	["\x03\x09\xbf\x00\x00\x10"] = "Multiplayer Reply",
	["\x03\x09\xbf\x00\x00\x03"] = "Multiplayer ACK",
	["\x00\xf0\x77\x77\x77\x77"] = "Access point",
	["\xff\xff\xff\xff\xff\xff"] = "Broadcast",
}

function get_addr_label(addr)
	local label = DS_SYSTEM_ADDRS[addr]
	if label ~= nil then
		return label
	end

	label = room_user_addrs[addr]
	if label ~= nil then
		return string.format("user %s", label)
	end

	return nil
end

function add_addr(tree, field, buffer, value)
	value = value or buffer:raw()
	local treeitem = tree:add(field, buffer, value)

	local label = get_addr_label(value)
	if label ~= nil then
		treeitem:append_text(string.format(" (%s)", label))
	end

	return treeitem
end

function add_addr_le(tree, field, buffer)
	return add_addr(tree, field, buffer, fix_addr_endianness(buffer:raw()))
end

function register_addr(addr, label)
	room_user_addrs[addr] = label
end

function register_addr_le(addr, label)
	room_user_addrs[fix_addr_endianness(addr)] = label
end

GAMEID = {
	PICTOCHAT = 0xe603,
	MARIOKART = 0xbe01,
}

PROFILE_COLOR_MAP = {
	[0] = "greyish blue",
	[1] = "brown",
	[2] = "red",
	[3] = "light pink",
	[4] = "orange",
	[5] = "yellow",
	[6] = "lime",
	[7] = "light green",
	[8] = "dark green",
	[9] = "turqoise",
	[10] = "light blue",
	[11] = "blue",
	[12] = "dark blue",
	[13] = "dark purple",
	[14] = "light purple",
	[15] = "dark pink",
}