bi_reverse
local unsigned bi_reverse OF((unsigned value, int length));
static_dtree[n].Code = bi_reverse(n, 5);
tree[n].Code = bi_reverse(next_code[len]++, len);
local unsigned bi_reverse OF((unsigned value, int length));
static_dtree[n].Code = bi_reverse((unsigned)n, 5);
tree[n].Code = bi_reverse(next_code[len]++, len);