Support for arbitrary sized byte array

[penumbra23]

Hi!

First of, thanks for the lib, I'm doing some PoC network protocols and by far it's solving the headache of OS endianness. My question is how can I support arbitrary sized byte array?

For example:

#[derive(PackedSize, EncodeBE, DecodeBE)]
pub struct Chat {
    group: [u8; 32],
    msg_size: u32,
    msg: [u8; 256],
}

msg should be max 256 bytes, the actual size is msg_size. Any idea how to overcome this? Or should I manually handle the data coming from the network?

[mbyzhang]

#10