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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_controller.hpp The controller of the AI. */
#ifndef AI_CONTROLLER_HPP
#define AI_CONTROLLER_HPP
#include "../../core/string_compare_type.hpp"
#include <map>
/**
* The Controller, the class each AI should extend. It creates the AI, makes
* sure the logic kicks in correctly, and that GetTick() has a valid value.
*/
class AIController {
friend class AIScanner;
friend class AIInstance;
public:
/**
* Initializer of the AIController.
*/
AIController();
/**
* Destructor of the AIController.
*/
~AIController();
/**
* This function is called to start your AI. Your AI starts here. If you
* return from this function, your AI dies, so make sure that doesn't
* happen.
* @note Cannot be called from within your AI.
*/
void Start();
/**
* Find at which tick your AI currently is.
* @return returns the current tick.
*/
static uint GetTick();
/**
* Get the number of operations the AI may still execute this tick.
* @return The amount of operations left to execute.
* @note This number can go negative when certain uninteruptable
* operations are executed. The amount of operations that you go
* over the limit will be deducted from the next tick you would
* be allowed to run.
*/
static int GetOpsTillSuspend();
/**
* Get the value of one of your settings you set via info.nut.
* @param name The name of the setting.
* @return the value for the setting, or -1 if the setting is not known.
*/
static int GetSetting(const char *name);
/**
* Get the OpenTTD version of this executable. The version is formatted
* with the bits having the following meaning:
* 28-31 major version
* 24-27 minor version
* 20-23 build
* 19 1 if it is a release, 0 if it is not.
* 0-18 revision number; 0 when the revision is unknown.
* @return The version in newgrf format.
*/
static uint GetVersion();
/**
* Change the minimum amount of time the AI should be put in suspend mode
* when you execute a command. Normally in SP this is 1, and in MP it is
* what ever delay the server has been programmed to delay commands
* (normally between 1 and 5). To give a more 'real' effect to your AI,
* you can control that number here.
* @param ticks The minimum amount of ticks to wait.
* @pre Ticks should be positive. Too big values will influence performance of the AI.
* @note If the number is lower than the MP setting, the MP setting wins.
*/
static void SetCommandDelay(int ticks);
/**
* Sleep for X ticks. The code continues after this line when the X AI ticks
* are passed. Mind that an AI tick is different from in-game ticks and
* differ per AI speed.
* @param ticks the ticks to wait
* @pre ticks > 0.
* @post the value of GetTick() will be changed exactly 'ticks' in value after
* calling this.
*/
static void Sleep(int ticks);
/**
* When Squirrel triggers a print, this function is called.
* Squirrel calls this when 'print' is used, or when the script made an error.
* @param error_msg If true, it is a Squirrel error message.
* @param message The message Squirrel logged.
* @note Use AILog.Info/Warning/Error instead of 'print'.
*/
static void Print(bool error_msg, const char *message);
private:
typedef std::map<const char *, const char *, StringCompare> LoadedLibraryList; ///< The type for loaded libraries.
uint ticks; ///< The amount of ticks we're sleeping.
LoadedLibraryList loaded_library; ///< The libraries we loaded.
int loaded_library_count; ///< The amount of libraries.
/**
* Register all classes that are known inside the NoAI API.
*/
void RegisterClasses();
/**
* Check if a library is already loaded. If found, fake_class_name is filled
* with the fake class name as given via AddLoadedLibrary. If not found,
* next_number is set to the next number available for the fake namespace.
* @param library_name The library to check if already loaded.
* @param next_number The next available number for a library if not already loaded.
* @param fake_class_name The name the library has if already loaded.
* @param fake_class_name_len The maximum length of fake_class_name.
* @return True if the library is already loaded.
*/
bool LoadedLibrary(const char *library_name, int *next_number, char *fake_class_name, int fake_class_name_len);
/**
* Add a library as loaded.
*/
void AddLoadedLibrary(const char *library_name, const char *fake_class_name);
};
#endif /* AI_CONTROLLER_HPP */
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