outputBytes

    fn outputBytes(h: *Huffman, bytes: []const u8, eos: bool) Writer.Error!void {
        comptime assert(max_tokens != 65535);
        assert(bytes.len <= max_tokens);
        var freqs: [257]u16 = @splat(0);
        freqs[256] = 1;
        for (bytes) |b| freqs[b] += 1;
        h.hasher.update(bytes);

        var codes_buf: CodesBuf = .init;
        if (try h.outputHeader(&freqs, &codes_buf, @intCast(bytes.len), eos)) |table| {
            for (bytes) |b| {
                try h.bit_writer.write(table.codes[b], table.bits[b]);
            }
            try h.bit_writer.write(table.codes[256], table.bits[256]);
        } else {
            try h.bit_writer.output.writeAll(bytes);
        }
    }