58 #define GSIZE(hdr) ((short)(SEGSIZ - GGAPSZ(hdr)))  macro
278 	b->eof->ofst = GSIZE(b->eof->hdr);  in bmkchn()
561 	return p->ofst == GSIZE(p->hdr);  in piseof()
603 	if (++p->ofst == GSIZE(p->hdr))  in pisbol()
704 		p->ofst = GSIZE(p->hdr);  in pnext()
721 	p->ofst = GSIZE(p->hdr);  in pprev()
732 	if (p->ofst == GSIZE(p->hdr))  in pgetb()
735 	if (++p->ofst == GSIZE(p->hdr))  in pgetb()
896 		if (p->ofst == GSIZE(p->hdr))  in pgetc()
899 		if (++p->ofst == GSIZE(p->hdr))  in pgetc()
948 		if (p->ofst == GSIZE(p->hdr))  in pfwrd()
951 					p->byte += GSIZE(p->hdr);  in pfwrd()
952 					n -= GSIZE(p->hdr);  in pfwrd()
957 			} while (n > GSIZE(p->hdr));  in pfwrd()
963 	if (p->ofst == GSIZE(p->hdr))  in pfwrd()
1058 			} while (n > GSIZE(p->hdr));  in pbkwd()
1117 		while (p->ofst != GSIZE(p->hdr)) {  in p_goto_eol()
1130 				if (p->ofst == GSIZE(p->hdr))  in p_goto_eol()
1143 		if (p->ofst == GSIZE(p->hdr))  in pnextl()
1145 				p->byte += GSIZE(p->hdr) - p->ofst;  in pnextl()
1158 	if (p->ofst == GSIZE(p->hdr))  in pnextl()
1254 			if (p->ofst == GSIZE(p->hdr))  in pcol()
1267 			if (++p->ofst == GSIZE(p->hdr))  in pcol()
1315 			if (p->ofst == GSIZE(p->hdr))  in pcoli()
1328 			if (++p->ofst == GSIZE(p->hdr))  in pcoli()
1380 	while (n > GSIZE(p->hdr) - p->ofst) {  in ffwrd()
1381 		n -= GSIZE(p->hdr) - p->ofst;  in ffwrd()
1386 	if (p->ofst == GSIZE(p->hdr))  in ffwrd()
1483 		if (p->ofst == GSIZE(p->hdr))  in getto()
1486 			p->byte += GSIZE(p->hdr);  in getto()
1541 	if (p->ofst == GSIZE(p->hdr))  in fpgetc()
1544 	if (++p->ofst == GSIZE(p->hdr))  in fpgetc()
1731 			l->hole = GSIZE(q->hdr);  in bcpy()
1760 	if (p->hdr != p->b->eof->hdr && GSIZE(p->hdr) + GSIZE(p->hdr->link.next) <= SEGSIZ - SEGSIZ / 4) {  in pcoalesce()
1763 		short osize = GSIZE(p->hdr);  in pcoalesce()
1764 		short size = GSIZE(hdr);  in pcoalesce()
1768 		ginsm(p->hdr, p->ptr, GSIZE(p->hdr), ptr, size);  in pcoalesce()
1782 	if (p->hdr != p->b->bof->hdr && GSIZE(p->hdr) + GSIZE(p->hdr->link.prev) <= SEGSIZ - SEGSIZ / 4) {  in pcoalesce()
1785 		short size = GSIZE(hdr);  in pcoalesce()
1938 	if (!GSIZE(to->hdr) && from->byte) {  in bcut()
1945 		from->ofst = GSIZE(ph);  in bcut()
2101 		p->b->eof->ofst = GSIZE(p->b->eof->hdr);  in inschn()
2107 		p->b->eof->ofst = GSIZE(p->b->eof->hdr);  in inschn()
3079 	while (size > (amnt = GSIZE(np->hdr) - np->ofst)) {  in bsavefd()
3298 	if (p->ofst == GSIZE(p->hdr))  in brc()
3324 	while (size > (amnt = GSIZE(np->hdr) - np->ofst)) {  in brmem()