#ifndef _LIBRARY_HH#define _LIBRARY_HH#include <map>//#include <string>#include "stage_types.hh"#include "stage_types.hh"class CWorld;class CEntity;// ADDING A DEVICE TO THE LIBRARY//// Each entity class should declare a static function that returns a// pointer to a new instance of that entity, given a world and a// parent.//// here is an example function definition from positiondevice.hh://///  public: static CPositionDevice* Creator( CWorld *world, CEntity *parent )//   {//      return( new CPositionDevice( world, parent ) );//   }//class LibraryItem{public:  LibraryItem( const char* token, const char* colorstr, CreatorFunctionPtr creator_func );    CreatorFunctionPtr FindCreatorFromToken( char* token );  int  FindTypeNumFromToken( char* token );  const char* FindTokenFromCreator( CreatorFunctionPtr cfp );  LibraryItem* FindLibraryItemFromToken( char* token );  const char* token;//[STAGE_TOKEN_MAX];  CreatorFunctionPtr creator_func;  int type_num; // each library entry has a unique type number    StageColor color;  //char* SetToken( char* token )  //{ return( strncpy( token, this->token, STAGE_TOKEN_MAX ) ); }    // this is used to set the type number in the constructor, where it  // is incremented in each use.  static int type_count;  // list-enabling pointers for use with STAGE_LIST_X macros  LibraryItem *prev, *next;};class Library{private:  // a list of [type,token,creator] mappings  LibraryItem* liblist;  public:  // constructor  Library( void );  Library( const libitem_t items[] );    void AddDevice( const char* token, const char* colorstr, CreatorFunctionPtr creator );  // create an instance of an entity given a worldfile token  CEntity* CreateEntity( char* token, CWorld* world_ptr, CEntity* parent_ptr );    // create an instance of an entity given a pointer to a named constructor  //CEntity* CreateEntity( CreatorFunctionPtr cfp, CWorld* world_ptr, CEntity* parent_ptr );    const char* TokenFromCreator( CreatorFunctionPtr cfp );  int TypeNumFromToken( char* token );  LibraryItem* LibraryItemFromToken( char* token );  void Print();};#endif