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/* $Id$ */
/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file ai_object.hpp Main object, on which all objects depend. */
#ifndef AI_OBJECT_HPP
#define AI_OBJECT_HPP
#include "../../misc/countedptr.hpp"
#include "../../road_type.h"
#include "../../rail_type.h"
#include "ai_types.hpp"
/**
* The callback function when an AI suspends.
*/
typedef void (AISuspendCallbackProc)(class AIInstance *instance);
/**
* The callback function for Mode-classes.
*/
typedef bool (AIModeProc)();
/**
* Uper-parent object of all API classes. You should never use this class in
* your AI, as it doesn't publish any public functions. It is used
* internally to have a common place to handle general things, like internal
* command processing, and command-validation checks.
*/
class AIObject : public SimpleCountedObject {
friend class AIInstance;
#ifndef DOXYGEN_AI_DOCS
protected:
/**
* A class that handles the current active instance. By instantiating it at
* the beginning of a function with the current active instance, it remains
* active till the scope of the variable closes. It then automatically
* reverts to the active instance it was before instantiating.
*/
class ActiveInstance {
friend class AIObject;
public:
ActiveInstance(AIInstance *instance);
~ActiveInstance();
private:
AIInstance *last_active; ///< The active instance before we go instantiated.
static AIInstance *active; ///< The global current active instance.
};
public:
/**
* Store the latest result of a DoCommand per company.
* @param res The result of the last command.
*/
static void SetLastCommandRes(bool res);
/**
* Get the currently active instance.
* @return The instance.
*/
static class AIInstance *GetActiveInstance();
protected:
/**
* Executes a raw DoCommand for the AI.
*/
static bool DoCommand(TileIndex tile, uint32 p1, uint32 p2, uint cmd, const char *text = NULL, AISuspendCallbackProc *callback = NULL);
/**
* Sets the DoCommand costs counter to a value.
*/
static void SetDoCommandCosts(Money value);
/**
* Increase the current value of the DoCommand costs counter.
*/
static void IncreaseDoCommandCosts(Money value);
/**
* Get the current DoCommand costs counter.
*/
static Money GetDoCommandCosts();
/**
* Set the DoCommand last error.
*/
static void SetLastError(AIErrorType last_error);
/**
* Get the DoCommand last error.
*/
static AIErrorType GetLastError();
/**
* Set the road type.
*/
static void SetRoadType(RoadType road_type);
/**
* Get the road type.
*/
static RoadType GetRoadType();
/**
* Set the rail type.
*/
static void SetRailType(RailType rail_type);
/**
* Get the rail type.
*/
static RailType GetRailType();
/**
* Set the current mode of your AI to this proc.
*/
static void SetDoCommandMode(AIModeProc *proc, AIObject *instance);
/**
* Get the current mode your AI is currently under.
*/
static AIModeProc *GetDoCommandMode();
/**
* Get the instance of the current mode your AI is currently under.
*/
static AIObject *GetDoCommandModeInstance();
/**
* Set the delay of the DoCommand.
*/
static void SetDoCommandDelay(uint ticks);
/**
* Get the delay of the DoCommand.
*/
static uint GetDoCommandDelay();
/**
* Get the latest result of a DoCommand.
*/
static bool GetLastCommandRes();
/**
* Get the latest stored new_vehicle_id.
*/
static VehicleID GetNewVehicleID();
/**
* Get the latest stored new_sign_id.
*/
static SignID GetNewSignID();
/**
* Get the latest stored new_tunnel_endtile.
*/
static TileIndex GetNewTunnelEndtile();
/**
* Get the latest stored new_group_id.
*/
static GroupID GetNewGroupID();
/**
* Store a allow_do_command per company.
* @param allow The new allow.
*/
static void SetAllowDoCommand(bool allow);
/**
* Get the internal value of allow_do_command. This can differ
* from CanSuspend() if the reason we are not allowed
* to execute a DoCommand is in squirrel and not the API.
* In that case use this function to restore the previous value.
* @return True iff DoCommands are allowed in the current scope.
*/
static bool GetAllowDoCommand();
/**
* Set the cost of the last command.
*/
static void SetLastCost(Money last_cost);
/**
* Get the cost of the last command.
*/
static Money GetLastCost();
/**
* Set a variable that can be used by callback functions to pass information.
*/
static void SetCallbackVariable(int index, int value);
/**
* Get the variable that is used by callback functions to pass information.
*/
static int GetCallbackVariable(int index);
/**
* Can we suspend the AI at this moment?
*/
static bool CanSuspend();
/**
* Get the pointer to store event data in.
*/
static void *&GetEventPointer();
/**
* Get the pointer to store log message in.
*/
static void *&GetLogPointer();
private:
/**
* Store a new_vehicle_id per company.
* @param vehicle_id The new VehicleID.
*/
static void SetNewVehicleID(VehicleID vehicle_id);
/**
* Store a new_sign_id per company.
* @param sign_id The new SignID.
*/
static void SetNewSignID(SignID sign_id);
/**
* Store a new_tunnel_endtile per company.
* @param tile The new TileIndex.
*/
static void SetNewTunnelEndtile(TileIndex tile);
/**
* Store a new_group_id per company.
* @param group_id The new GroupID.
*/
static void SetNewGroupID(GroupID group_id);
#endif /* DOXYGEN_AI_DOCS */
};
#endif /* AI_OBJECT_HPP */
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