isc_buffer_current
if (timingsafe_bcmp(isc_buffer_current(optbuf), sit, 8) == 0) {
r.base = isc_buffer_current(optbuf);
isc_buffer_current(&optbuf),
optdata = isc_buffer_current(&optbuf);
optdata = isc_buffer_current(&optbuf);
cdata = isc_buffer_current(source);
isc_buffer_putmem(target, isc_buffer_current(source),
src = isc_buffer_current(b);
cp = isc_buffer_current(b);
cp = isc_buffer_current(b);
cp = isc_buffer_current(b);
(_r)->base = isc_buffer_current(_b); \
(_r)->base = isc_buffer_current(_b); \