Method PassOnFlow

src/station_cmd.cpp:5233–5245

* Pass on some flow, remembering it as invalid, for later subtraction from * locally consumed flow. This is necessary because we can't have negative * flows and we don't want to sort the flows before adding them up. * @param origin Origin of the flow. * @param via Next hop. * @param flow Amount of flow to be passed. */

 * @param flow Amount of flow to be passed.
 */
void FlowStatMap::PassOnFlow(StationID origin, StationID via, uint flow)
{
	FlowStatMap::iterator prev_it = this->find(origin);
	if (prev_it == this->end()) {
		FlowStat fs(via, flow);
		fs.AppendShare(StationID::Invalid(), flow);
		this->emplace(origin, fs);
	} else {
		prev_it->second.ChangeShare(via, flow);
		prev_it->second.ChangeShare(StationID::Invalid(), flow);
		assert(!prev_it->second.GetShares()->empty());
	}
}

/**
 * Subtract invalid flows from locally consumed flow.