pcount
_IO_ssize_t pcount() { return ((strstreambuf*)_strbuf)->pcount(); }
_IO_ssize_t pcount();
_IO_ssize_t pcount() { return ((strstreambuf*)_strbuf)->pcount(); }
u_int8_t *pcount;
pcount = frm; frm += 2;
LE_WRITE_2(pcount, count);
pcount = frm; frm += 2;
LE_WRITE_2(pcount, count);
next_chunk = buf + stream.pcount();