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/* $Id$ */
/** @file ai_order.cpp Implementation of AIOrder. */
#include "ai_order.hpp"
#include "ai_vehicle.hpp"
#include "../ai_instance.hpp"
#include "../../debug.h"
#include "../../vehicle_base.h"
#include "../../depot_base.h"
#include "../../station_map.h"
#include "../../waypoint.h"
/**
* Gets the order type given a tile
* @param t the tile to get the order from
* @return the order type, or OT_END when there is no order
*/
static OrderType GetOrderTypeByTile(TileIndex t)
{
if (!::IsValidTile(t)) return OT_END;
switch (::GetTileType(t)) {
default: break;
case MP_STATION: return OT_GOTO_STATION; break;
case MP_WATER: if (::IsShipDepot(t)) return OT_GOTO_DEPOT; break;
case MP_ROAD: if (::GetRoadTileType(t) == ROAD_TILE_DEPOT) return OT_GOTO_DEPOT; break;
case MP_RAILWAY:
switch (::GetRailTileType(t)) {
case RAIL_TILE_DEPOT: return OT_GOTO_DEPOT;
case RAIL_TILE_WAYPOINT: return OT_GOTO_WAYPOINT;
default: break;
}
break;
}
return OT_END;
}
/* static */ bool AIOrder::IsValidVehicleOrder(VehicleID vehicle_id, OrderPosition order_position)
{
return AIVehicle::IsValidVehicle(vehicle_id) && order_position >= 0 && (order_position < ::GetVehicle(vehicle_id)->GetNumOrders() || order_position == ORDER_CURRENT);
}
/* static */ AIOrder::OrderPosition AIOrder::ResolveOrderPosition(VehicleID vehicle_id, OrderPosition order_position)
{
if (!AIVehicle::IsValidVehicle(vehicle_id)) return ORDER_INVALID;
if (order_position == ORDER_CURRENT) return (AIOrder::OrderPosition)::GetVehicle(vehicle_id)->cur_order_index;
return (order_position >= 0 && order_position < ::GetVehicle(vehicle_id)->GetNumOrders()) ? order_position : ORDER_INVALID;
}
/* static */ bool AIOrder::AreOrderFlagsValid(TileIndex destination, AIOrderFlags order_flags)
{
switch (::GetOrderTypeByTile(destination)) {
case OT_GOTO_STATION:
return ((order_flags & ~(AIOF_NON_STOP_FLAGS | AIOF_UNLOAD_FLAGS | AIOF_LOAD_FLAGS)) == 0) &&
/* Test the different mutual exclusive flags. */
(((order_flags & AIOF_TRANSFER) == 0) || ((order_flags & AIOF_UNLOAD) == 0)) &&
(((order_flags & AIOF_TRANSFER) == 0) || ((order_flags & AIOF_NO_UNLOAD) == 0)) &&
(((order_flags & AIOF_UNLOAD) == 0) || ((order_flags & AIOF_NO_UNLOAD) == 0)) &&
(((order_flags & AIOF_UNLOAD) == 0) || ((order_flags & AIOF_NO_UNLOAD) == 0)) &&
(((order_flags & AIOF_NO_UNLOAD) == 0) || ((order_flags & AIOF_NO_LOAD) == 0)) &&
(((order_flags & AIOF_FULL_LOAD_ANY) == 0) || ((order_flags & AIOF_NO_LOAD) == 0));
case OT_GOTO_DEPOT: return (order_flags & ~(AIOF_NON_STOP_FLAGS | AIOF_SERVICE_IF_NEEDED)) == 0;
case OT_GOTO_WAYPOINT: return (order_flags & ~(AIOF_NON_STOP_FLAGS)) == 0;
default: return false;
}
}
/* static */ int32 AIOrder::GetOrderCount(VehicleID vehicle_id)
{
return AIVehicle::IsValidVehicle(vehicle_id) ? ::GetVehicle(vehicle_id)->GetNumOrders() : -1;
}
/* static */ TileIndex AIOrder::GetOrderDestination(VehicleID vehicle_id, OrderPosition order_position)
{
if (!IsValidVehicleOrder(vehicle_id, order_position)) return INVALID_TILE;
const Order *order;
const Vehicle *v = ::GetVehicle(vehicle_id);
if (order_position == ORDER_CURRENT) {
order = &v->current_order;
} else {
order = v->GetFirstOrder();
for (int i = 0; i < order_position; i++) order = order->next;
}
switch (order->GetType()) {
case OT_GOTO_DEPOT:
if (v->type != VEH_AIRCRAFT) return ::GetDepot(order->GetDestination())->xy;
/* FALL THROUGH: aircraft's hangars are referenced by StationID, not DepotID */
case OT_GOTO_STATION: return ::GetStation(order->GetDestination())->xy;
case OT_GOTO_WAYPOINT: return ::GetWaypoint(order->GetDestination())->xy;
default: return INVALID_TILE;
}
}
/* static */ AIOrder::AIOrderFlags AIOrder::GetOrderFlags(VehicleID vehicle_id, OrderPosition order_position)
{
if (!IsValidVehicleOrder(vehicle_id, order_position)) return AIOF_INVALID;
const Order *order;
if (order_position == ORDER_CURRENT) {
order = &::GetVehicle(vehicle_id)->current_order;
} else {
order = ::GetVehicle(vehicle_id)->GetFirstOrder();
for (int i = 0; i < order_position; i++) order = order->next;
}
AIOrderFlags order_flags = AIOF_NONE;
order_flags |= (AIOrderFlags)order->GetNonStopType();
switch (order->GetType()) {
case OT_GOTO_DEPOT:
if (order->GetDepotOrderType() & ODTFB_SERVICE) order_flags |= AIOF_SERVICE_IF_NEEDED;
break;
case OT_GOTO_STATION:
order_flags |= (AIOrderFlags)(order->GetLoadType() << 5);
order_flags |= (AIOrderFlags)(order->GetUnloadType() << 2);
break;
default: break;
}
return order_flags;
}
/* static */ bool AIOrder::AppendOrder(VehicleID vehicle_id, TileIndex destination, AIOrderFlags order_flags)
{
EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
return InsertOrder(vehicle_id, (AIOrder::OrderPosition)::GetVehicle(vehicle_id)->GetNumOrders(), destination, order_flags);
}
/* static */ bool AIOrder::InsertOrder(VehicleID vehicle_id, OrderPosition order_position, TileIndex destination, AIOrder::AIOrderFlags order_flags)
{
/* IsValidVehicleOrder is not good enough because it does not allow appending. */
if (order_position == ORDER_CURRENT) order_position = AIOrder::ResolveOrderPosition(vehicle_id, order_position);
EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
EnforcePrecondition(false, order_position >= 0 && order_position <= ::GetVehicle(vehicle_id)->GetNumOrders());
EnforcePrecondition(false, AreOrderFlagsValid(destination, order_flags));
Order order;
switch (::GetOrderTypeByTile(destination)) {
case OT_GOTO_DEPOT:
order.MakeGoToDepot(::GetDepotByTile(destination)->index, (OrderDepotTypeFlags)(ODTFB_PART_OF_ORDERS | ((order_flags & AIOF_SERVICE_IF_NEEDED) ? ODTFB_SERVICE : 0)));
break;
case OT_GOTO_STATION:
order.MakeGoToStation(::GetStationIndex(destination));
order.SetLoadType((OrderLoadFlags)GB(order_flags, 5, 3));
order.SetUnloadType((OrderUnloadFlags)GB(order_flags, 2, 3));
break;
case OT_GOTO_WAYPOINT:
order.MakeGoToWaypoint(::GetWaypointIndex(destination));
break;
default:
return false;
}
order.SetNonStopType((OrderNonStopFlags)GB(order_flags, 0, 2));
return AIObject::DoCommand(0, vehicle_id | (order_position << 16), order.Pack(), CMD_INSERT_ORDER);
}
/* static */ bool AIOrder::RemoveOrder(VehicleID vehicle_id, OrderPosition order_position)
{
order_position = AIOrder::ResolveOrderPosition(vehicle_id, order_position);
EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position));
return AIObject::DoCommand(0, vehicle_id, order_position, CMD_DELETE_ORDER);
}
/**
* Callback handler as ChangeOrder possibly needs multiple DoCommand calls
* to be able to set all order flags correctly. As we need to wait till the
* command has completed before we know the next bits to change we need to
* call the function multiple times. Each time it'll reduce the difference
* between the wanted and the current order.
* @param instance The AI we are doing the callback for.
*/
static void _DoCommandReturnChangeOrder(class AIInstance *instance)
{
AIObject::SetLastCommandRes(AIOrder::_ChangeOrder());
AIInstance::DoCommandReturn(instance);
}
/* static */ bool AIOrder::_ChangeOrder()
{
/* Make sure we don't go into an infinite loop */
int retry = AIObject::GetCallbackVariable(3) - 1;
if (retry < 0) {
DEBUG(ai, 0, "Possible infinite loop in ChangeOrder detected");
return false;
}
AIObject::SetCallbackVariable(3, retry);
VehicleID vehicle_id = (VehicleID)AIObject::GetCallbackVariable(0);
OrderPosition order_position = (OrderPosition)AIObject::GetCallbackVariable(1);
AIOrderFlags order_flags = (AIOrderFlags)AIObject::GetCallbackVariable(2);
order_position = AIOrder::ResolveOrderPosition(vehicle_id, order_position);
EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position));
EnforcePrecondition(false, AreOrderFlagsValid(GetOrderDestination(vehicle_id, order_position), order_flags));
Order *order = ::GetVehicle(vehicle_id)->GetFirstOrder();
for (int i = 0; i < order_position; i++) order = order->next;
AIOrderFlags current = GetOrderFlags(vehicle_id, order_position);
if ((current & AIOF_NON_STOP_FLAGS) != (order_flags & AIOF_NON_STOP_FLAGS)) {
return AIObject::DoCommand(0, vehicle_id | (order_position << 16), (order_flags & AIOF_NON_STOP_FLAGS) << 4 | MOF_NON_STOP, CMD_MODIFY_ORDER, NULL, &_DoCommandReturnChangeOrder);
}
switch (order->GetType()) {
case OT_GOTO_DEPOT:
if ((current & AIOF_SERVICE_IF_NEEDED) != (order_flags & AIOF_SERVICE_IF_NEEDED)) {
return AIObject::DoCommand(0, vehicle_id | (order_position << 16), MOF_DEPOT_ACTION, CMD_MODIFY_ORDER, NULL, &_DoCommandReturnChangeOrder);
}
break;
case OT_GOTO_STATION:
if ((current & AIOF_UNLOAD_FLAGS) != (order_flags & AIOF_UNLOAD_FLAGS)) {
return AIObject::DoCommand(0, vehicle_id | (order_position << 16), (order_flags & AIOF_UNLOAD_FLAGS) << 2 | MOF_UNLOAD, CMD_MODIFY_ORDER, NULL, &_DoCommandReturnChangeOrder);
}
if ((current & AIOF_LOAD_FLAGS) != (order_flags & AIOF_LOAD_FLAGS)) {
return AIObject::DoCommand(0, vehicle_id | (order_position << 16), (order_flags & AIOF_LOAD_FLAGS) >> 1 | MOF_LOAD, CMD_MODIFY_ORDER, NULL, &_DoCommandReturnChangeOrder);
}
break;
default: break;
}
assert(GetOrderFlags(vehicle_id, order_position) == order_flags);
return true;
}
/* static */ bool AIOrder::ChangeOrder(VehicleID vehicle_id, OrderPosition order_position, AIOrder::AIOrderFlags order_flags)
{
AIObject::SetCallbackVariable(0, vehicle_id);
AIObject::SetCallbackVariable(1, order_position);
AIObject::SetCallbackVariable(2, order_flags);
/* In case another client(s) change orders at the same time we could
* end in an infinite loop. This stops that from happening ever. */
AIObject::SetCallbackVariable(3, 8);
return AIOrder::_ChangeOrder();
}
/* static */ bool AIOrder::MoveOrder(VehicleID vehicle_id, OrderPosition order_position_move, OrderPosition order_position_target)
{
order_position_move = AIOrder::ResolveOrderPosition(vehicle_id, order_position_move);
order_position_target = AIOrder::ResolveOrderPosition(vehicle_id, order_position_target);
EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position_move));
EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position_target));
return AIObject::DoCommand(0, vehicle_id, order_position_move | (order_position_target << 16), CMD_MOVE_ORDER);
}
/* static */ bool AIOrder::CopyOrders(VehicleID vehicle_id, VehicleID main_vehicle_id)
{
EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
EnforcePrecondition(false, AIVehicle::IsValidVehicle(main_vehicle_id));
return AIObject::DoCommand(0, vehicle_id | (main_vehicle_id << 16), CO_COPY, CMD_CLONE_ORDER);
}
/* static */ bool AIOrder::ShareOrders(VehicleID vehicle_id, VehicleID main_vehicle_id)
{
EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
EnforcePrecondition(false, AIVehicle::IsValidVehicle(main_vehicle_id));
return AIObject::DoCommand(0, vehicle_id | (main_vehicle_id << 16), CO_SHARE, CMD_CLONE_ORDER);
}
/* static */ bool AIOrder::UnshareOrders(VehicleID vehicle_id)
{
EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
return AIObject::DoCommand(0, vehicle_id, CO_UNSHARE, CMD_CLONE_ORDER);
}
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