Struct ReverseBitReader 

pub struct ReverseBitReader<'a> {
    pub data: &'a [u8],
    pub container: u64,
    pub bits_consumed: u32,
    pub ptr: usize,
    pub limit_ptr: usize,
}

Reverse bitstream reader using C zstd’s bitsConsumed model.

Instead of tracking bits_available (decrement on consume, increment on refill), this tracks bits_consumed (increment on consume, reset on reload). Peek uses a double-shift: (container << consumed) >> (64 - n) = 2 ops vs the old model’s 3 ops (shift + mask + subtract).

Fields

data: &'a [u8]

container: u64

bits_consumed: u32

ptr: usize

limit_ptr: usize

Implementations

impl<'a> ReverseBitReader<'a>

pub fn new(data: &'a [u8]) -> Result<Self, DecompressError>

pub fn refill(&mut self)

pub fn read_bits(&mut self, n: u8) -> Result<u32, DecompressError>

pub fn read_bits_unchecked(&mut self, n: u8) -> u32

pub fn consume_bits(&mut self, n: u8)

pub fn read_bits_fast(&mut self, n: u8) -> u32

pub fn read_bits_branchless(&mut self, n: u8) -> u32

pub fn refill_fast(&mut self)

pub fn peek_bits(&self, n: u8) -> u32

pub fn bits_remaining(&self) -> usize

pub fn is_empty(&self) -> bool