#ifndef MENU_H#define MENU_H/* A single menu */typedef void (*menu_finish_callback)(struct menu_s *menu);typedef struct menu_s{    char *name;                     /* Menu name */    int  num_options;               /* Number of options in this menu */    int  flags;                     /* Various flags - see below */    int  option_align;              /* Aligns options to a field width of this much characters if != 0 */    struct menu_option_s **options; /* Pointer to this menu's options */    menu_finish_callback callback;  /* Called when the menu closes */} menu_t;/* * type: Type of the option (see below) * name: Name to display for this option * help: Optional help string * id  : optional id number * sys : pointer for system-specific data, init to NULL and don't touch */#define OPTION_PREAMBLE				\    int type;                     		\    char *name;   				\    char *help;   				\    int id;                                     \    void *sys;                                  \/* * Menu option types. * There are a number of different layouts for menu options depending * on their types. Currently there are the following possibilities: * * Submenu: *   This entry links to a new menu. * * Boolean: *   A simple on/off toggle entry. Booleans can be either yes/no, 0/1 or on/off. *   Optionally, this entry can enable/disable a set of other options. An example would *   be to enable/disable on-board USB, and if enabled give access to further options like *   irq settings, base address etc. * * Text: *   A single line/limited number of characters text entry box. Text can be restricted *   to a certain charset (digits/hex digits/all/custom). Result is also available as an *   int if numeric.  * * Selection: *   One-of-many type of selection entry. User may choose on of a set of strings, which *   maps to a specific value for the variable. * * Routine: *   Selecting this calls an entry-specific routine. This can be used for saving contents etc. * * Custom: *   Display and behaviour of this entry is defined by a set of callbacks. */#define MENU_SUBMENU_TYPE 0typedef struct menu_submenu_s{    OPTION_PREAMBLE    menu_t *   submenu;            /* Pointer to the submenu */} menu_submenu_t;#define MENU_BOOLEAN_TYPE 1typedef struct menu_boolean_s{    OPTION_PREAMBLE    char *variable;                /* Name of the variable to getenv()/setenv() */    int subtype;                   /* Subtype (on/off, 0/1, yes/no, enable/disable), see below */    int mutex;                     /* Bit mask of options to enable/disable. Bit 0 is the option				      immediately following this one, bit 1 is the next one etc.				      bit 7 = 0 means to disable when this option is off,				      bit 7 = 1 means to disable when this option is on.				      An option is disabled when the type field's upper bit is set */} menu_boolean_t;/* BOOLEAN Menu flags */#define MENU_BOOLEAN_ONOFF         0x01#define MENU_BOOLEAN_01            0x02#define MENU_BOOLEAN_YESNO         0x03#define MENU_BOOLEAN_ENDIS         0x04#define MENU_BOOLEAN_TYPE_MASK     0x07#define MENU_TEXT_TYPE 2typedef struct menu_text_s{    OPTION_PREAMBLE    char *variable;                /* Name of the variable to getenv()/setenv() */    int maxchars;                  /* Max number of characters */    char *charset;                 /* Optional charset to use */    int flags;                     /* Flags - see below */} menu_text_t;/* TEXT entry menu flags */#define MENU_TEXT_NUMERIC         0x01#define MENU_TEXT_HEXADECIMAL     0x02#define MENU_TEXT_FREE            0x03#define MENU_TEXT_TYPE_MASK       0x07#define MENU_SELECTION_TYPE 3typedef struct menu_select_option_s{    char *map_from;               /* Map this variable contents ... */    char *map_to;                 /* ... to this menu text and vice versa */} menu_select_option_t;typedef struct menu_select_s{    OPTION_PREAMBLE    int num_options;             /* Number of mappings */    menu_select_option_t **options;                                 /* Option list array */} menu_select_t;#define MENU_ROUTINE_TYPE 4typedef void (*menu_routine_callback)(struct menu_routine_s *);typedef struct menu_routine_s{    OPTION_PREAMBLE    menu_routine_callback callback;                                 /* routine to be called */     void *user_data;             /* User data, don't care for system */} menu_routine_t;    #define MENU_CUSTOM_TYPE 5typedef void (*menu_custom_draw)(struct menu_custom_s *);typedef void (*menu_custom_key)(struct menu_custom_s *, int);typedef struct menu_custom_s{    OPTION_PREAMBLE    menu_custom_draw drawfunc;    menu_custom_key  keyfunc;    void *user_data;} menu_custom_t;/* * The menu option superstructure */typedef struct menu_option_s{    union    {	menu_submenu_t m_sub_menu;	menu_boolean_t m_boolean;	menu_text_t    m_text;	menu_select_t  m_select;	menu_routine_t m_routine;    };} menu_option_t;/* Init the menu system. Returns <0 on error */int menu_init(menu_t *root);/* Execute a single menu. Returns <0 on error */int menu_do(menu_t *menu);#endif