internal int build_bl_tree()
{
scan_tree(dyn_ltree, treeLiterals.max_code);
scan_tree(dyn_dtree, treeDistances.max_code);
treeBitLengths.build_tree(this);
int num = InternalConstants.BL_CODES - 1;
while (num >= 3 && bl_tree[ZTree.bl_order[num] * 2 + 1] == 0)
{
num--;
}
opt_len += 3 * (num + 1) + 5 + 5 + 4;
return(num);
}
internal void _tr_flush_block(int buf, int stored_len, bool eof)
{
int num = 0;
int num2;
int num3;
if (compressionLevel > CompressionLevel.None)
{
if (data_type == Z_UNKNOWN)
{
set_data_type();
}
treeLiterals.build_tree(this);
treeDistances.build_tree(this);
num = build_bl_tree();
num2 = opt_len + 3 + 7 >> 3;
num3 = static_len + 3 + 7 >> 3;
if (num3 <= num2)
{
num2 = num3;
}
}
else
{
num2 = (num3 = stored_len + 5);
}
if (stored_len + 4 <= num2 && buf != -1)
{
_tr_stored_block(buf, stored_len, eof);
}
else if (num3 == num2)
{
send_bits((STATIC_TREES << 1) + (eof ? 1 : 0), 3);
send_compressed_block(StaticTree.lengthAndLiteralsTreeCodes, StaticTree.distTreeCodes);
}
else
{
send_bits((DYN_TREES << 1) + (eof ? 1 : 0), 3);
send_all_trees(treeLiterals.max_code + 1, treeDistances.max_code + 1, num + 1);
send_compressed_block(dyn_ltree, dyn_dtree);
}
_InitializeBlocks();
if (eof)
{
bi_windup();
}
}