(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/ai_scanner.hpp

@@ -0,0 +1,102 @@
+/* $Id$ */
+
+/** @file ai_scanner.hpp declarations of the class for AI scanner */
+
+#ifndef AI_SCANNER_HPP
+#define AI_SCANNER_HPP
+
+#include <map>
+
+class AIScanner {
+public:
+	AIScanner();
+	~AIScanner();
+
+	/**
+	 * Import a library inside the Squirrel VM.
+	 */
+	bool ImportLibrary(const char *library, const char *class_name, int version, HSQUIRRELVM vm, class AIController *controller);
+
+	/**
+	 * Register a library to be put in the available list.
+	 */
+	void RegisterLibrary(class AILibrary *library);
+
+	/**
+	 * Register an AI to be put in the available list.
+	 */
+	void RegisterAI(class AIInfo *info);
+
+	void SetDummyAI(class AIInfo *info) { this->info_dummy = info; }
+
+	/**
+	 * Remove an AI from the available list.
+	 */
+	void UnregisterAI(class AIInfo *info);
+
+	/**
+	 * Select a Random AI.
+	 */
+	class AIInfo *SelectRandomAI();
+
+	/**
+	 * Find an AI by name.
+	 */
+	class AIInfo *FindAI(const char *name);
+
+	/**
+	 * Get the list of available AIs for the console.
+	 */
+	char *GetAIConsoleList(char *p, const char *last);
+
+	/**
+	 * Get the list of all registered AIs.
+	 */
+	const AIInfoList *GetAIInfoList() { return &this->info_list; }
+
+	/**
+	 * Get the engine of the main squirrel handler (it indexes all avialable squirrels).
+	 */
+	class Squirrel *GetEngine() { return this->engine; }
+
+	/**
+	 * Get the current script the ScanDir is looking at.
+	 */
+	const char *GetCurrentScript() { return this->current_script; }
+
+	/**
+	 * Get the directory of the current script the ScanDir is looking at.
+	 */
+	const char *GetCurrentDirName() { return this->current_dir; }
+
+	/**
+	 * Rescan the AI dir for scripts.
+	 */
+	void RescanAIDir();
+
+private:
+	typedef std::map<const char *, class AILibrary *, ltstr> AILibraryList;
+
+	/**
+	 * Scan the AI dir for scripts.
+	 */
+	void ScanAIDir();
+
+	/**
+	 * Scan a dir for AIs.
+	 *  For non-library-scan, if an AI is found, AIInfo is created, and the AI
+	 *    is registered to the central system.
+	 *  For library-scan, if a library is found, AILibrary is created, and the
+	 *    library is registered to the central system.
+	 */
+	void ScanDir(const char *dirname, bool library_dir, char *library_depth = NULL);
+
+	AIInfoList info_list;
+	AIInfo *info_dummy;
+	AILibraryList library_list;
+	class Squirrel *engine;
+	char *current_script;
+	char *current_dir;
+};
+
+#endif /* AI_SCANNER_HPP */