1  #define NULLABLE(x) do {                    \
       2          if (x == Py_None) {                 \
       3              x = NULL;                       \
       4          }                                   \
       5      } while (0);
       6  
       7  #define RETURN_INT(value) do {              \
       8          int _ret = (value);                 \
       9          if (_ret == -1) {                   \
      10              assert(PyErr_Occurred());       \
      11              return NULL;                    \
      12          }                                   \
      13          assert(!PyErr_Occurred());          \
      14          return PyLong_FromLong(_ret);       \
      15      } while (0)
      16  
      17  #define RETURN_SIZE(value) do {             \
      18          Py_ssize_t _ret = (value);          \
      19          if (_ret == -1) {                   \
      20              assert(PyErr_Occurred());       \
      21              return NULL;                    \
      22          }                                   \
      23          assert(!PyErr_Occurred());          \
      24          return PyLong_FromSsize_t(_ret);    \
      25      } while (0)
      26  
      27  /* Marker to check that pointer value was set. */
      28  #define UNINITIALIZED_PTR ((void *)"uninitialized")
      29  /* Marker to check that Py_ssize_t value was set. */
      30  #define UNINITIALIZED_SIZE ((Py_ssize_t)236892191)
      31  /* Marker to check that integer value was set. */
      32  #define UNINITIALIZED_INT (63256717)