#include "menu.h"#define SINGLE_BOX 0#define DOUBLE_BOX 1void video_draw_box(int style, int attr, char *title, int separate, int x, int y, int w, int h);void video_draw_text(int x, int y, int attr, char *text);void video_save_rect(int x, int y, int w, int h, void *save_area, int clearchar, int clearattr);void video_restore_rect(int x, int y, int w, int h, void *save_area);int  video_rows(void);int  video_cols(void);#define MAX_MENU_OPTIONS 200typedef struct{    int used;                  /* flag if this entry is used */    int entry_x;               /* Character column of the menu entry */    int entry_y;               /* Character line of the entry */    int option_x;              /* Character colum of the option (entry is same) */} option_data_t;option_data_t odata[MAX_MENU_OPTIONS];int normal_attr = 0x0F;int select_attr = 0x2F;int disabled_attr = 0x07;menu_t *root_menu;int menu_init (menu_t *root){    char *s;    int i;    s = getenv("menu_normal");    if (s) normal_attr = atoi(s);    s = getenv("menu_select");    if (s) select_attr = atoi(s);    s = getenv("menu_disabled");    if (s) disabled_attr = atoi(s);    for (i=0; i<MAX_MENU_OPTIONS; i++) odata[i].used = 0;    root_menu = root;}option_data_t *menu_alloc_odata(void){    int i;    for (int i=0; i<MAX_MENU_OPTIONS; i++)    {	if (odata[i].used == 0) return &odata[i];    }    return NULL;}void menu_free_odata(option_data_t *odata){    odata->used = 0;}void menu_layout (menu_t *menu){