Logging data from arbitrary binary using Cheat Engine

#if _32x_
loadlibrary(luaclient-i386.dll)
#else
loadlibrary(luaclient-x86_64.dll)
#endif
luacall(openLuaServer('CELUASERVER'))

CELUA_ServerName:
db 'CELUASERVER',0

[ENABLE]

{$lua}
if syntaxcheck then return end

-- Get timezone (from http://lua-users.org/wiki/TimeZone)
local function get_timezone()
  local now = os.time()
  return os.difftime(now, os.time(os.date("!*t", now)))
end
timezone = get_timezone()

-- Return a timezone string in ISO 8601:2000 standard form (+hhmm or -hhmm)
local function get_tzoffset(timezone)
  local h, m = math.modf(timezone / 3600)
  return string.format("%+.4d", 100 * h + 60 * m)
end
tzoffset = get_tzoffset(timezone)

-- Actual log function
function do_log()
  file = io.open("out.log", "a")
  local offset = readInteger(getAddress("SpectrometerSim_Win32.exe+22A084"))
  local amplitude = readFloat(getAddress("SpectrometerSim_Win32.exe+221A90"))
  -- Alternatively 'os.date("!%Y-%m-%dT%H:%M:%S")' would return UTC time
  file:write(os.date("%Y-%m-%dT%H:%M:%S"), tzoffset, ",", offset, ",", amplitude, "\n")
  file:close()
end


{$asm}

define(address,"SpectrometerSim_Win32.exe"+1D9FDC)
define(bytes,E8 5F 5B EC FF)

assert(address,bytes)
alloc(newmem,$1000)
alloc(luafunctionid,4)
alloc(luafunctionname,256)

label(code)
label(return)

luafunctionname:
  db 'do_log()',0

newmem:
  // Call the lua function (differs for x64 and x32 binaries!)
  push 1 // Dummy value to pass to 'parameter' of our function (unused)
  push luafunctionname
  call CELUA_ExecuteFunction

code:
  call SpectrometerSim_Win32.exe+9FB40
  jmp return

address:
  jmp newmem
return:

[DISABLE]

address:
  db bytes
  // call SpectrometerSim_Win32.exe+9FB40

dealloc(newmem)