#define TLINE(y) ((y) < term.scr ? term.hist[((y) + term.histi - \                     term.scr + HISTSIZE + 1) % HISTSIZE] : \                     term.line[(y) - term.scr]) void kscrolldown(const Arg *);void kscrollup(const Arg *); #if SCROLLBACK_MOUSE_PATCH || SCROLLBACK_MOUSE_ALTSCREEN_PATCHtypedef struct {	 uint b;	 uint mask;	 void (*func)(const Arg *);	 const Arg arg;} MouseKey; extern MouseKey mkeys[];#endif // SCROLLBACK_MOUSE_PATCH / SCROLLBACK_MOUSE_ALTSCREEN_PATCH