typedef struct Gmenu Gmenu;typedef struct Link Link;typedef struct Hist Hist; struct Gmenu{	Link	*link;	Rtext	*text;}; struct Link{	char *addr;	char *sel;	int  type;}; struct Hist{	Hist *p;	Hist *n;	Gmenu *m;}; enum{	Ttext,	Tmenu,	Tns,	Terror,	Tbinhex,	Tdos,	Tuuencoded,	Tsearch,	Ttelnet,	Tbinary,	Tmirror,	Tgif,	Timage,	Tt3270,	Tdoc,	Thtml,	Tinfo,	Tsound,	Teof};