tlbits 0.2.11

TL-B serialization (bits only)
Documentation 
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mod r#as;
mod reader;

use bitvec::{order::Msb0, slice::BitSlice, view::AsBits};

pub use self::{r#as::*, reader::*};

use core::mem::MaybeUninit;
use std::{rc::Rc, sync::Arc};

use crate::{Error, FromInto, ResultExt, StringError};

pub trait BitUnpack: Sized {
    fn unpack<R>(reader: R) -> Result<Self, R::Error>
    where
        R: BitReader;
}

#[inline]
pub fn unpack<T>(bits: impl AsRef<BitSlice<u8, Msb0>>) -> Result<T, StringError>
where
    T: BitUnpack,
{
    bits.as_ref().unpack()
}

#[inline]
pub fn unpack_as<T, As>(bits: impl AsRef<BitSlice<u8, Msb0>>) -> Result<T, StringError>
where
    As: BitUnpackAs<T>,
{
    bits.as_ref().unpack_as::<T, As>()
}

#[inline]
pub fn unpack_fully<T>(bits: impl AsRef<BitSlice<u8, Msb0>>) -> Result<T, StringError>
where
    T: BitUnpack,
{
    let mut bits = bits.as_ref();
    let v = bits.unpack()?;
    if !bits.is_empty() {
        return Err(Error::custom("more data left"));
    }
    Ok(v)
}

#[inline]
pub fn unpack_fully_as<T, As>(bits: impl AsRef<BitSlice<u8, Msb0>>) -> Result<T, StringError>
where
    As: BitUnpackAs<T>,
{
    let mut bits = bits.as_ref();
    let v = bits.unpack_as::<T, As>()?;
    if !bits.is_empty() {
        return Err(Error::custom("more data left"));
    }
    Ok(v)
}

#[inline]
pub fn unpack_bytes<T>(bytes: impl AsRef<[u8]>) -> Result<T, StringError>
where
    T: BitUnpack,
{
    bytes.as_bits().unpack()
}

impl BitUnpack for () {
    #[inline]
    fn unpack<R>(_reader: R) -> Result<Self, R::Error>
    where
        R: BitReader,
    {
        Ok(())
    }
}

impl BitUnpack for bool {
    #[inline]
    fn unpack<R>(mut reader: R) -> Result<Self, R::Error>
    where
        R: BitReader,
    {
        reader.read_bit()
    }
}

impl<T, const N: usize> BitUnpack for [T; N]
where
    T: BitUnpack,
{
    #[inline]
    fn unpack<R>(mut reader: R) -> Result<Self, R::Error>
    where
        R: BitReader,
    {
        let mut arr: [MaybeUninit<T>; N] = unsafe { MaybeUninit::uninit().assume_init() };
        for (i, a) in arr.iter_mut().enumerate() {
            a.write(T::unpack(&mut reader).with_context(|| format!("[{i}]"))?);
        }
        Ok(unsafe { arr.as_ptr().cast::<[T; N]>().read() })
    }
}

macro_rules! impl_bit_deserialize_for_tuple {
    ($($n:tt:$t:ident),+) => {
        impl<$($t),+> BitUnpack for ($($t,)+)
        where $(
            $t: BitUnpack,
        )+
        {
            #[inline]
            fn unpack<R>(mut reader: R) -> Result<Self, R::Error>
            where
                R: BitReader,
            {
                Ok(($(
                    $t::unpack(&mut reader).context(concat!(".", stringify!($n)))?,
                )+))
            }
        }
    };
}
impl_bit_deserialize_for_tuple!(0:T0);
impl_bit_deserialize_for_tuple!(0:T0,1:T1);
impl_bit_deserialize_for_tuple!(0:T0,1:T1,2:T2);
impl_bit_deserialize_for_tuple!(0:T0,1:T1,2:T2,3:T3);
impl_bit_deserialize_for_tuple!(0:T0,1:T1,2:T2,3:T3,4:T4);
impl_bit_deserialize_for_tuple!(0:T0,1:T1,2:T2,3:T3,4:T4,5:T5);
impl_bit_deserialize_for_tuple!(0:T0,1:T1,2:T2,3:T3,4:T4,5:T5,6:T6);
impl_bit_deserialize_for_tuple!(0:T0,1:T1,2:T2,3:T3,4:T4,5:T5,6:T6,7:T7);
impl_bit_deserialize_for_tuple!(0:T0,1:T1,2:T2,3:T3,4:T4,5:T5,6:T6,7:T7,8:T8);
impl_bit_deserialize_for_tuple!(0:T0,1:T1,2:T2,3:T3,4:T4,5:T5,6:T6,7:T7,8:T8,9:T9);

impl<T> BitUnpack for Box<T>
where
    T: BitUnpack,
{
    #[inline]
    fn unpack<R>(mut reader: R) -> Result<Self, R::Error>
    where
        R: BitReader,
    {
        reader.unpack_as::<_, FromInto<T>>()
    }
}

impl<T> BitUnpack for Rc<T>
where
    T: BitUnpack,
{
    #[inline]
    fn unpack<R>(mut reader: R) -> Result<Self, R::Error>
    where
        R: BitReader,
    {
        reader.unpack_as::<_, FromInto<T>>()
    }
}

impl<T> BitUnpack for Arc<T>
where
    T: BitUnpack,
{
    #[inline]
    fn unpack<R>(mut reader: R) -> Result<Self, R::Error>
    where
        R: BitReader,
    {
        reader.unpack_as::<_, FromInto<T>>()
    }
}