154 tailpos(register Sfio_t* fp, register Sfoff_t number, int delim)  in tailpos()  argument
169 		if ((offset = last - number) < first)  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
205 	register Sfoff_t	nleft = number;  in pipetail()
211 	if (delim < 0 && a > number)  in pipetail()
212 		a = number;  in pipetail()
216 	while ((n = sfmove(infile, out, number, delim)) > 0)  in pipetail()
223 			nleft = number;  in pipetail()
226 	if (nleft == number)  in pipetail()
240 		if ((n = number - nleft) > 0)   in pipetail()
257 init(Tail_t* tp, Sfoff_t number, int delim, int flags, const char** format)  in init()  argument
270 	else if (!number)  in init()
287 		if (number < 0 || !number && (flags & POSITIVE))  in init()
290 			if (number < -1)  in init()
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()
354 	intmax_t	number;  in num()  local
372 	number = strtonll(s, &t, NiL, 0);  in num()
374 		number = DEFAULT;  in num()
377 		number = 0;  in num()
395 			number = -number;  in num()
399 	return number;  in num()
416 	Sfoff_t			number = DEFAULT;  in b_tail()  local
436 				number = argv[opt_info.index][0] == '-' ? 10 : -10;  in b_tail()
446 				number = -number;  in b_tail()
469 				number = num(s, &s, &flags, n);  in b_tail()
472 				number = DEFAULT;  in b_tail()
484 				number = -number;  in b_tail()
486 				number = -number;  in b_tail()
500 				number = -number;  in b_tail()
533 			if ((number = num(s, &t, &flags, 0)) && i)  in b_tail()
534 				number = -number;  in b_tail()
539 				number = -number;  in b_tail()
589 		number *= blocks;  in b_tail()
595 			number = -1;  in b_tail()
621 			if (!init(fp, number, delim, flags, &format))  in b_tail()
734 			if (number < 0 || !number && (flags & POSITIVE))  in b_tail()
737 				if (number < -1)  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()