seq! with partial byte fields?

[ckoehler]

Hi there!

What's the best way to parse something like 0b1000_0100, where 0b10.._.... is one field, and 0b..00_0100 is another? This is in the midst of other fields that are on byte boundaries.

I could just parse that byte and then refer back to it, but that would require defining it in the struct:

struct Packet {
  the_byte: u8,
  field1: u8,
  field2: u8,
}

and then in the parse function something like (untested):

seq! {Self{
    the_byte: be_u8,
    field1: (the_byte & 0xc0) >> 6,
    field2: the_byte & 0x3f,
}}.parse_next(i)

Maybe that's the best way, just wanted to throw this out.

Thanks!

Christoph

[epage]

That or not use seq! and maybe even parse more imperatively.

[epage]

You could also make field1 and field2 accessors, rather than direct fields

[ckoehler]

True. Thanks for the confirmation!