chunk_from_dataptr
else UDB_CHUNK(chunk_from_dataptr(rp->data))->ptrlist = r;
f = chunk_from_dataptr(r);
c = chunk_from_dataptr(r);
n = chunk_from_dataptr(newd);
udb_void f = chunk_from_dataptr(r);
ch = chunk_from_dataptr(to);
p = UDB_CHUNK(chunk_from_dataptr(to))->ptrlist;
UDB_CHUNK(chunk_from_dataptr(ptr->data))->ptrlist = ptr->next;
udb_chunk_d* chunk = UDB_CHUNK(chunk_from_dataptr(to));
f = chunk_from_dataptr(ptr->data);
return chunk_from_dataptr(data);