138 struct ppinstk				/* input stream stack frame	*/  struct
141 	struct ppinstk*	next;		/* next frame (for allocation)	*/  argument
142 	struct ppinstk*	prev;		/* previous frame		*/  argument
286 	struct ppinstk*	in;		/* input stream stack pointer	*/ \
554 			pp.in->next = newof(0, struct ppinstk, 1, 0); \
568 		register struct ppinstk*	cur; \
580 		register struct ppinstk*	cur; \
600 		register struct ppinstk*	cur; \
613 		register struct ppinstk*	cur; \
625 		register struct ppinstk*	cur; \
648 		register struct ppinstk*	cur; \
663 		register struct ppinstk*	cur; \
675 		register struct ppinstk*	cur; \
685 		register struct ppinstk*	cur; \
826 extern char*		ppinstr(struct ppinstk*);