decodeLiterals

            fn decodeLiterals(d: *Decode, w: *Writer, len: usize) !void {
                switch (d.literal_header.block_type) {
                    .raw => {
                        try w.writeAll(d.literal_streams.one[d.literal_written_count..][0..len]);
                    },
                    .rle => {
                        try w.splatByteAll(d.literal_streams.one[0], len);
                    },
                    .compressed, .treeless => {
                        const buf = try w.writableSlice(len);
                        const huffman_tree = d.huffman_tree.?;
                        const max_bit_count = huffman_tree.max_bit_count;
                        const starting_bit_count = LiteralsSection.HuffmanTree.weightToBitCount(
                            huffman_tree.nodes[huffman_tree.symbol_count_minus_one].weight,
                            max_bit_count,
                        );
                        var bits_read: u4 = 0;
                        var huffman_tree_index: usize = huffman_tree.symbol_count_minus_one;
                        var bit_count_to_read: u4 = starting_bit_count;
                        for (buf) |*out| {
                            var prefix: u16 = 0;
                            while (true) {
                                const new_bits = try d.readLiteralsBits(bit_count_to_read);
                                prefix <<= bit_count_to_read;
                                prefix |= new_bits;
                                bits_read += bit_count_to_read;
                                const result = try huffman_tree.query(huffman_tree_index, prefix);

                                switch (result) {
                                    .symbol => |sym| {
                                        out.* = sym;
                                        bit_count_to_read = starting_bit_count;
                                        bits_read = 0;
                                        huffman_tree_index = huffman_tree.symbol_count_minus_one;
                                        break;
                                    },
                                    .index => |index| {
                                        huffman_tree_index = index;
                                        const bit_count = LiteralsSection.HuffmanTree.weightToBitCount(
                                            huffman_tree.nodes[index].weight,
                                            max_bit_count,
                                        );
                                        bit_count_to_read = bit_count - bits_read;
                                    },
                                }
                            }
                        }
                    },
                }
            }