42 typedef struct DirStructure DirStructure;  typedef
44 struct DirStructure  struct
46     DirStructure*       next;  argument
47     DirStructure*       prev;  argument
48     DirStructure*       child;  argument
49     DirStructure*       parent;  argument
53     DirStructure*       file;  argument
58     DirStructure*       nextInFst;  argument
59     DirStructure*       nextInDisc;                 // only valid for files  argument
60     DirStructure*       prevInDisc;                 // only valid for files  argument
69 DirStructure            DiskStart;  argument