VBSIZE
if (strlen(buf) + strlen(str) + 1 >= VBSIZE) {
var unsigned char DEL[VBSIZE+1]; /* Last deleted text */
var unsigned char INS[VBSIZE+1]; /* Last inserted text */
var unsigned char vmacbuf[VBSIZE]; /* Text of visual macro, hence nonnestable */
(VBSIZE(ITOV(ip)) / sizeof (daddr32_t)));
VBSIZE(ITOV(ip)));
long bsize = VBSIZE(vp);
ASSERT(MAXPATHLEN <= VBSIZE(ITOV(ip)));