ExtReMLapin · December 9, 2020 11:52 · Dec 9, 2020
diff --git a/binaryluadiff.lua b/binaryluadiff.lua
@@ -0,0 +1,44 @@
+assert(#arg == 2)
+local source
+local dest
+local f1 = assert(io.open(arg[1], "rb"), "cannot open " .. arg[1])
+source = f1:read("*all")
+f1:close()
+local f2 = assert(io.open(arg[2], "rb"), "cannot open " .. arg[2])
+dest = f2:read("*all")
+f2:close()
+assert(#source == #dest)
+print("ok")
+print[[
+| Position | OriginalBytes |  PatchedBytes |
+|----------|:-------------:|--------------:|]]
+
+
+local i = 1
+local max = #source
+
+while (i <= max) do
+	if source:sub(i, i) ~= dest:sub(i, i) then
+		local i2 = 0
+		local tmpTbl = {}
+
+		while (source:sub(i + i2, i + i2) ~= dest:sub(i + i2, i + i2)) do
+			table.insert(tmpTbl, { string.format('%02X',(source:sub(i + i2, i + i2):byte())),  string.format('%02X',(dest:sub(i + i2, i + i2):byte()))})
+
+			i2 = i2 + 1
+		end
+
+		local originalBytes = ""
+		local patchedBytes = ""
+
+		for k, v in ipairs(tmpTbl) do
+			originalBytes = originalBytes .. v[1] .. " "
+			patchedBytes = patchedBytes .. v[2] .. " "
+		end
+
+		print(string.format("| 0x%s | %s | %s |", string.format('%08X', i), originalBytes, patchedBytes))
+		i = i + i2
+	end
+
+	i = i + 1
+end