(svn r15027) -Merge: tomatos and bananas left to be, here is NoAI for all to see.

NoAI is an API (a framework) to build your own AIs in. See:
   http://wiki.openttd.org/wiki/index.php/AI:Main_Page
 With many thanks to:
  - glx and Rubidium for their syncing, feedback and hard work
  - Yexo for his feedback, patches, and AIs which tested the system very deep
  - Morloth for his feedback and patches
  - TJIP for hosting a challenge which kept NoAI on track
  - All AI authors for testing our AI API, and all other people who helped in one way or another
-Remove: all old AIs and their cheats/hacks

src/ai/api/ai_controller.hpp

@@ -0,0 +1,117 @@
+/* $Id$ */
+
+/** @file ai_controller.hpp The controller of the AI. */
+
+#ifndef AI_CONTROLLER_HPP
+#define AI_CONTROLLER_HPP
+
+#include <map>
+#ifndef AI_HPP
+struct ltstr { bool operator()(const char *s1, const char *s2) const { return strcmp(s1, s2) < 0; } };
+#endif /* AI_HPP */
+
+/**
+ * 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:
+	static const char *GetClassName() { return "AIController"; }
+
+	/**
+	 * 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.
+	 */
+	uint GetTick();
+
+	/**
+	 * 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.
+	 */
+	int GetSetting(const char *name);
+
+	/**
+	 * 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 then 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 *, ltstr> LoadedLibraryList;
+
+	uint ticks;
+	LoadedLibraryList loaded_library;
+	int loaded_library_count;
+
+	/**
+	 * 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 */