How to use

codes

function

in

Array

cmd_code = ReadSymbol(hgroup[1].codes, htree_command, br);
range_idx = cmd_code >> 6;
if (range_idx >= 2) {
 --block_length[0];
 prev_byte2 = prev_byte1;
 prev_byte1 = ReadSymbol(hgroup[0].codes, hgroup[0].htrees[literal_htree_index], br);
 ringbuffer[pos & ringbuffer_mask] = prev_byte1;
 if ((pos & ringbuffer_mask) === ringbuffer_mask) {
 context = (copy_length > 4 ? 3 : copy_length - 2) & 0xff;
 dist_htree_index = dist_context_map[dist_context_map_slice + context];
 distance_code = ReadSymbol(hgroup[2].codes, hgroup[2].htrees[dist_htree_index], br);
 if (distance_code >= num_direct_distance_codes) {
  var nbits;