I need to write my own marshalling functions for a network protocol stack. Is
there any way I can make use of the <caml/intext.h> serialization and
deserialization functions? Has anyone trod this path before me and is willing
to share their wisdom?

Why am I doing this, you ask? Bandwidth is critical, and custom marshalling can
save a lot of space - especially in getting rid of headers. Also, I want to do
things like serialize some info, add a MAC, then serialize some more. The
off-the-shelf solution is too space-inefficient:

let alen = Marshal.to_buffer buf ofs max adata [] in
let mac = Digest.substring buf ofs alen in
let blen = Marshal.to_buffer buf (ofs + alen) (max - alen) (mac, bdata) [] in
...

Thanks for any advice...

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