typedef struct MAV_LISTITEM {
void *data1;
void *data2;
struct MAV_LISTITEM *next;
struct MAV_LISTITEM *prev;
} MAV_listItem;
typedef struct MAV_LISTPOINTER {
MAV_listItem *item;
struct MAV_LISTPOINTER *next;
} MAV_listPointer;
typedef struct {
int length;
MAV_listItem *head;
MAV_listItem *tail;
MAV_listPointer *current;
} MAV_list;