used = space - s.avail_out;
space = MIN(2 * space, dst_max ?: (uint64_t) -1);
if (!greedy_realloc(dst, dst_alloc_size, space, 1))
used = space - s.avail_out;
space = MIN(2 * space, dst_max ?: (uint64_t) -1);
if (!greedy_realloc(dst, dst_alloc_size, space, 1))