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    "# Custom Backend Loader\n",
    "\n",
    "If you want to load the disassembled binaries made by a tool that is not yet supported by QBinDiff you can implement your own backend loader.\n",
    "\n",
    "You have to provide an implementation for all the classes that are found in `src/qbindiff/loader/backend/abstract.py`:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
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   "source": [
    "import networkx\n",
    "from collections.abc import Iterator\n",
    "\n",
    "from qbindiff.loader.backend import (\n",
    "    AbstractOperandBackend,\n",
    "    AbstractInstructionBackend,\n",
    "    AbstractBasicBlockBackend,\n",
    "    AbstractFunctionBackend,\n",
    "    AbstractProgramBackend\n",
    ")\n",
    "from qbindiff.loader import Structure\n",
    "from qbindiff.loader.types import ReferenceType, ReferenceTarget, FunctionType\n",
    "from qbindiff.types import Addr\n",
    "\n",
    "class CustomOperandBackend(AbstractOperandBackend):\n",
    "\n",
    "    def __str__(self) -> str:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def immutable_value(self) -> int | None:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def type(self) -> int:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    def is_immutable(self) -> bool:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "class CustomInstructionBackend(AbstractInstructionBackend):\n",
    "\n",
    "    @property\n",
    "    def addr(self) -> Addr:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def mnemonic(self) -> str:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def references(self) -> dict[ReferenceType, list[ReferenceTarget]]:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def operands(self) -> Iterator[AbstractOperandBackend]:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def groups(self) -> list[int]:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def id(self) -> int:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def comment(self) -> str:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def bytes(self) -> bytes:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "class CustomBasicBlockBackend(AbstractBasicBlockBackend):\n",
    "\n",
    "    @property\n",
    "    def addr(self) -> Addr:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def instructions(self) -> Iterator[AbstractInstructionBackend]:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "class CustomFunctionBackend(AbstractFunctionBackend):\n",
    "\n",
    "    @property\n",
    "    def basic_blocks(self) -> Iterator[AbstractBasicBlockBackend]:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def addr(self) -> Addr:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def graph(self) -> networkx.DiGraph:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def parents(self) -> set[Addr]:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def children(self) -> set[Addr]:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def type(self) -> FunctionType:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def name(self) -> str:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "class CustomProgramBackend(AbstractProgramBackend):\n",
    "\n",
    "    @property\n",
    "    def functions(self) -> Iterator[AbstractFunctionBackend]:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def name(self) -> str:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def structures(self) -> list[Structure]:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def callgraph(self) -> networkx.DiGraph:\n",
    "        raise NotImplementedError()\n",
    "\n",
    "    @property\n",
    "    def fun_names(self) -> dict[str, Addr]:\n",
    "        raise NotImplementedError()\n"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Most of the methods are self-explanatory but if you want to know more look at the docstring in the file `src/qbindiff/loader/backend/abstract.py`\n",
    "or at the python help."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on class AbstractProgramBackend in module qbindiff.loader.backend.abstract:\n",
      "\n",
      "class AbstractProgramBackend(builtins.object)\n",
      " |  This is an abstract class and should not be used as is.\n",
      " |  It represents a generic backend loader for a Program\n",
      " |  \n",
      " |  Readonly properties defined here:\n",
      " |  \n",
      " |  callgraph\n",
      " |      The callgraph of the program.\n",
      " |  \n",
      " |  exec_path\n",
      " |      Returns the executable path\n",
      " |  \n",
      " |  fun_names\n",
      " |      Returns a dictionary with function name as key and the function address as value.\n",
      " |  \n",
      " |  functions\n",
      " |      Returns an iterator over backend function objects.\n",
      " |  \n",
      " |  name\n",
      " |      The name of the program.\n",
      " |  \n",
      " |  structures\n",
      " |      Returns the list of structures defined in program.\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Data descriptors defined here:\n",
      " |  \n",
      " |  __dict__\n",
      " |      dictionary for instance variables (if defined)\n",
      " |  \n",
      " |  __weakref__\n",
      " |      list of weak references to the object (if defined)\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Data and other attributes defined here:\n",
      " |  \n",
      " |  __abstractmethods__ = frozenset({'callgraph', 'exec_path', 'fun_names'...\n",
      "\n"
     ]
    }
   ],
   "source": [
    "from qbindiff.loader.backend import AbstractProgramBackend\n",
    "\n",
    "help(AbstractProgramBackend)"
   ]
  }
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