Your task is to provide the missing implementation for functions and structures in db.c. The basic usage might look like this:

  g_autoptr(Db) db = DbNew(item_free, item_get_id, NULL);
  MyItem *item = g_new(MyItem, 1);
  size_t i = 0;

  item->id = 3;

  DbInsert(db, item);

  g_autoptr(MyItem) item2 = DbGet(db, 3);

Take a look at db_test_1.c, db_test_2.c or db_test_3.c for more examples.

The design of _Db structure is completely up to you, just like algorithms used. You can introduce new internal functions or macros you want. You can use standard C library and GLib. If you allocate any memory, do not forget to free it once no longer needed.

Please make sure your code passes tests. You can run test suite by:

  meson test -C _build/

Note: Replace _build with your build directory.

Feel free to ask any questions.