154 tailpos(register Sfio_t* fp, register Sfoff_t number, int delim)  in tailpos()  argument
167 	if (delim < 0)  in tailpos()
183 			if (*--t == delim && number-- <= 0)  in tailpos()
201 pipetail(Sfio_t* infile, Sfio_t* outfile, Sfoff_t number, int delim)  in pipetail()  argument
211 	if (delim < 0 && a > number)  in pipetail()
216 	while ((n = sfmove(infile, out, number, delim)) > 0)  in pipetail()
241 			sfmove(tmp[!fno], NiL, n, delim);   in pipetail()
257 init(Tail_t* tp, Sfoff_t number, int delim, int flags, const char** format)  in init()  argument
292 				sfmove(tp->sp, NiL, -number - 1, delim);  in init()
298 		else if ((offset = tailpos(tp->sp, number, delim)) >= 0)  in init()
319 			pipetail(tp->sp ? tp->sp : sfstdin, op, number, delim);  in init()
408 	int			delim;  in b_tail()  local
587 	delim = (flags & LINES) ? '\n' : -1;  in b_tail()
592 		if (delim < 0)  in b_tail()
621 			if (!init(fp, number, delim, flags, &format))  in b_tail()
738 					sfmove(ip, NiL, -number - 1, delim);  in b_tail()
747 				if ((offset = tailpos(ip, number, delim)) >= 0)  in b_tail()
760 					pipetail(ip, op, number, delim);  in b_tail()