Files
rdsspy-lua-host/examples/ert.lua
2026-01-01 17:23:22 +01:00

45 lines
1.6 KiB
Lua

ert_group = -1
ert_string = string.rep(" ", 128)
function command(cmd, param)
if cmd:lower() == "request" then
local cr_pos = ert_string:find("\r", 1, true) -- true means "plain search" (faster)
local display_text
if cr_pos then
display_text = ert_string:sub(1, cr_pos - 1)
else
-- No CR found yet, show the whole 128 bytes (trimmed of trailing spaces)
display_text = ert_string:gsub("%s+$", "")
end
db.add_value("ERT", display_text)
end
end
function group(stream, b_corr, a, b, c, d)
if stream ~= 0 and a ~= 0 then return
elseif stream ~= 0 and not db.load_boolean("rdsspy.ini", "General", "Tunnelling", false) then return end
if b_corr then return end
local group = (b & 0xf000) >> 12
local group_version = (b & 0x800) >> 11
if group == 3 and group_version == 0 then
local oda_group = (b & 0x1f) >> 1
local oda_group_version = b & 1
if d == 0x6552 and oda_group_version == 0 then
-- ERT
ert_group = oda_group
elseif oda_group == ert_group then ert_group = -1 end
elseif group == ert_group and group_version == 0 then
local ert_state = b & 0x1f
local char1 = string.char((c >> 8) & 0xff)
local char2 = string.char(c & 0xff)
local char3 = string.char((d >> 8) & 0xff)
local char4 = string.char(d & 0xff)
local new_chars = char1..char2..char3..char4
local start_pos = (ert_state * 4) + 1
ert_string = ert_string:sub(1, start_pos - 1) .. new_chars .. ert_string:sub(start_pos + 4)
end
end