write_propval_int
write_propval_int(f, p, chunk_len, 2);
write_propval_int(f, p + 4, chunk_len - 4, 4);
write_propval_int(f, p, chunk_len, 4);
write_propval_int(f, p, chunk_len, 8);
write_propval_int(f, p, chunk_len, 1);