I think the `integer->integer-bytes` function is probably what you want.
Sam
On Mon, Oct 17, 2016 at 8:38 PM, David Storrs <david.sto...@gmail.com> wrote:
> What is the best way to write binary data such that I have control of the
> representation? Basically, I want the Racket equivalent of the Perl 'pack'
> and 'unpack' functions, where I can do: pack('C', 202) and get back a
> one-byte binary representation of the decimal number 202 (or pack('s', 202)
> to get a 2-byte version) that I could then write to a port.
>
> The reason that I'm looking for this is that I'm going to be writing binary
> data across the network and I want to be able to control the representation.
> For a fairly trivial example, I want to be able to decide how many bytes the
> number 202 should take up.[1] Furthermore, I'd like to have an easy way to
> do quick and dirty testing; I thought that writing to a byte string would be
> that way, but I'm not having much success with it, as I haven't figured out
> how to make things go in as raw bytes instead of strings.
>
> I've looked at fasl, binary-class, the implementation of protobuf, and
> everything in the racket-lang docs that I could think of keywords for, with
> no luck. This feels like it should be a straightforward task, so I'm
> frustrated with myself for not figuring it out more quickly.
>
>
> [1] I keep using the number 202 because that's the size of one particular
> message that I'm using in my text script and I'm trying to do RLE on it.
>
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