rat-rdp-graphics 0.1.0

Graphics decoding for rat_rdp_lite
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use core::ops;

use bitvec::prelude::{BitSlice, Msb0};

// FIXME: check if this should be deleted in favor of something else

pub(crate) struct Bits<'a> {
    bits_slice: &'a BitSlice<u8, Msb0>,
    remaining_bits_of_last_byte: usize,
}

impl<'a> Bits<'a> {
    pub(crate) fn new(bits_slice: &'a BitSlice<u8, Msb0>) -> Self {
        Self {
            bits_slice,
            remaining_bits_of_last_byte: 0,
        }
    }

    pub(crate) fn split_to(&mut self, at: usize) -> &'a BitSlice<u8, Msb0> {
        let (value, new_bits) = self.bits_slice.split_at(at);
        self.bits_slice = new_bits;
        self.remaining_bits_of_last_byte = (self.remaining_bits_of_last_byte + at) % 8;
        value
    }

    pub(crate) fn remaining_bits_of_last_byte(&self) -> usize {
        self.remaining_bits_of_last_byte
    }
}

impl ops::Deref for Bits<'_> {
    type Target = BitSlice<u8, Msb0>;

    fn deref(&self) -> &Self::Target {
        self.bits_slice
    }
}