Function GetCurrentGRFOverride

src/newgrf.cpp:196–204

* Get overridden GRF for current GRF if present. * @return Overridden GRFFile if present, or nullptr. */

 * @return Overridden GRFFile if present, or nullptr.
 */
GRFFile *GetCurrentGRFOverride()
{
	auto found = _grf_id_overrides.find(_cur_gps.grffile->grfid);
	if (found != std::end(_grf_id_overrides)) {
		GRFFile *grffile = GetFileByGRFID(found->second);
		if (grffile != nullptr) return grffile;
	}
	return nullptr;
}

/**
 * Returns the engine associated to a certain internal_id, resp. allocates it.