Function Vector_ass_slice

source/blender/python/mathutils/mathutils_Vector.cc:1938–1973

Sequence slice accessor (set): `object[i:j] = x`. */

/** Sequence slice accessor (set): `object[i:j] = x`. */
static int Vector_ass_slice(VectorObject *self, int begin, int end, PyObject *seq)
{
  int vec_num = 0;
  float *vec = nullptr;

  if (BaseMath_ReadCallback_ForWrite(self) == -1) {
    return -1;
  }

  CLAMP(begin, 0, self->vec_num);
  CLAMP(end, 0, self->vec_num);
  begin = std::min(begin, end);

  vec_num = (end - begin);
  if (mathutils_array_parse_alloc(&vec, vec_num, seq, "vector[begin:end] = [...]") == -1) {
    return -1;
  }

  if (vec == nullptr) {
    PyErr_SetString(PyExc_MemoryError,
                    "vec[:] = seq: "
                    "problem allocating pointer space");
    return -1;
  }

  /* Parsed well - now set in vector. */
  memcpy(self->vec + begin, vec, vec_num * sizeof(float));

  PyMem_Free(vec);

  if (BaseMath_WriteCallback(self) == -1) {
    return -1;
  }

  return 0;
}

/** Sequence generic subscript (get): `x = object[...]`. */
static PyObject *Vector_subscript(VectorObject *self, PyObject *item)