Lua:compareMemory

<> Reference

function compareMemory(address1, address2, size, method) : boolean, integer

Compares two memory regions.

Returns true if the memory regions are the same. If they differ, this function returns false and a secondary return value containing the index where the first difference was found.

The method parameter controls whether the given addresses are interpreted as target process memory or Cheat Engine memory.

Function Parameters

Parameter	Type	Description
address1	Integer or CEAddressString	The first address to compare.
address2	Integer or CEAddressString	The second address to compare.
size	Integer	The number of bytes to compare.
method	Integer	The comparison method to use.

Method Values

Value	Method	Description
0	Target to target	Compares address1 and address2 as target process addresses.
1	Target to Cheat Engine memory	Compares address1 as a target process address and address2 as a Cheat Engine memory address.
2	Cheat Engine memory to Cheat Engine memory	Compares address1 and address2 as Cheat Engine memory addresses.

Returns

boolean, integer — Returns true if the memory regions are the same. If they differ, returns false and the index where the first difference was found.

Examples

local address1 = getAddress("game.exe")
local address2 = address1 + 0x1000

local same, index = compareMemory(address1, address2, 256, 0)

if same then
  print("Memory regions are identical")
else
  print("Memory regions differ at index: " .. tostring(index))
end

local targetAddress = getAddress("game.exe")
local ceCopy = copyMemory(targetAddress, 256, nil, 1)

if ceCopy ~= nil then
  local same, index = compareMemory(targetAddress, ceCopy, 256, 1)

  if same then
    print("Target memory matches the CE memory copy")
  else
    print("Memory differs at index: " .. tostring(index))
  end
end

See Also

Main Pages

Lua
Script Engine

Memory Related Functions

allocateMemory

deAlloc

allocateSharedMemory

createSection

mapViewOfSection

unMapViewOfSection

copyMemory

compareMemory

allocateKernelMemory

freeKernelMemory

mapMemory

unmapMemory

createMemoryStream