mirror of
https://github.com/JGRennison/OpenTTD-patches.git
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47 lines
1.9 KiB
C
47 lines
1.9 KiB
C
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file vehiclelist_func.h Functions and type for generating vehicle lists. */
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#ifndef VEHICLELIST_FUNC_H
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#define VEHICLELIST_FUNC_H
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#include "order_base.h"
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#include "vehicle_base.h"
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/**
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* Find vehicles matching an order.
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* This can be used, e.g. to find all vehicles that stop at a particular station.
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* @param veh_pred Vehicle selection predicate. This is called only for the first vehicle using the order list.
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* @param ord_pred Order selection predicate.
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* @param veh_func Called for each vehicle that matches both vehicle and order predicates.
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**/
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template <class VehiclePredicate, class OrderPredicate, class VehicleFunc>
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void FindVehiclesWithOrder(VehiclePredicate veh_pred, OrderPredicate ord_pred, VehicleFunc veh_func)
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{
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for (const OrderList *orderlist : OrderList::Iterate()) {
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/* We assume all vehicles sharing an order list match the condition. */
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const Vehicle *v = orderlist->GetFirstSharedVehicle();
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if (!veh_pred(v)) continue;
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/* Vehicle is a candidate, search for a matching order. */
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for (const Order *order = orderlist->GetFirstOrder(); order != nullptr; order = order->next) {
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if (!ord_pred(order)) continue;
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/* An order matches, we can add all shared vehicles to the list. */
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for (; v != nullptr; v = v->NextShared()) {
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veh_func(v);
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}
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break;
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}
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}
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}
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#endif /* VEHICLELIST_FUNC_H */
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