Function GetGroupNumEngines

src/group_cmd.cpp:819–830

* Get the number of engines with EngineID id_e in the group with GroupID * id_g and its sub-groups. * @param company The company the group belongs to * @param id_g The GroupID of the group used * @param id_e The EngineID of the engine to count * @return The number of engines with EngineID id_e in the group */

 * @return The number of engines with EngineID id_e in the group
 */
uint GetGroupNumEngines(CompanyID company, GroupID id_g, EngineID id_e)
{
	uint count = 0;

	if (const Group *g = Group::GetIfValid(id_g); g != nullptr) {
		for (const GroupID &childgroup : g->children) {
			count += GetGroupNumEngines(company, childgroup, id_e);
		}
	}

	return count + GroupStatistics::Get(company, id_g, Engine::Get(id_e)->type).GetNumEngines(id_e);
}

/**
 * Get the number of vehicles in the group with GroupID