67 struct strpush {  struct
68 	struct strpush *prev;	/* preceding string on stack */  argument
88 	struct strpush *strpush; /* for pushing strings at this level */  argument
89 	struct strpush basestrpush; /* so pushing one is fast */
199 	while (parsefile->strpush) {  in preadbuffer()
205 		if (parsenleft == -1 && parsefile->strpush->ap != NULL)  in preadbuffer()
283 	if (parsefile->strpush)  in preadateof()
309 	struct strpush *sp;  in pushstring()
313 	if (parsefile->strpush) {  in pushstring()
314 		sp = ckmalloc(sizeof (struct strpush));  in pushstring()
315 		sp->prev = parsefile->strpush;  in pushstring()
316 		parsefile->strpush = sp;  in pushstring()
318 		sp = parsefile->strpush = &(parsefile->basestrpush);  in pushstring()
333 	struct strpush *sp = parsefile->strpush;  in popstring()
346 	parsefile->strpush = sp->prev;  in popstring()
448 	pf->strpush = NULL;  in pushfile()
464 	while (pf->strpush)  in popfile()