wtx 0.44.2

A collection of different transport implementations and related tools focused primarily on web technologies.
Documentation 
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use crate::{
  misc::{Lease, LeaseMut},
  rng::{CryptoSeedableRng, Rng, SeedableRng},
};

/// Xorshift that deals with 64 bits numbers.
///
/// This structure is `Copy` to allow usage with `AtomicCell` in concurrent scenarios.
#[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
pub struct Xorshift64 {
  value: u64,
}

impl Xorshift64 {
  /// Constructor
  #[inline]
  pub const fn new(value: u64) -> Self {
    Self { value }
  }
}

impl Rng for Xorshift64 {
  #[inline]
  fn u8_4(&mut self) -> [u8; 4] {
    xor_u8_4(&mut self.value)
  }

  #[inline]
  fn u8_8(&mut self) -> [u8; 8] {
    xor_u8_8(&mut self.value)
  }

  #[inline]
  fn u8_16(&mut self) -> [u8; 16] {
    xor_u8_16(&mut self.value)
  }

  #[inline]
  fn u8_32(&mut self) -> [u8; 32] {
    xor_u8_32(&mut self.value)
  }
}

impl CryptoSeedableRng for Xorshift64 {
  type Seed = [u8; 8];

  #[inline]
  fn from_seed(seed: Self::Seed) -> crate::Result<Self> {
    Ok(Self::from(u64::from_be_bytes(seed)))
  }
}

impl Lease<Xorshift64> for Xorshift64 {
  #[inline]
  fn lease(&self) -> &Xorshift64 {
    self
  }
}

impl LeaseMut<Xorshift64> for Xorshift64 {
  #[inline]
  fn lease_mut(&mut self) -> &mut Xorshift64 {
    self
  }
}

impl SeedableRng for Xorshift64 {}

impl From<u64> for Xorshift64 {
  #[inline]
  fn from(value: u64) -> Self {
    Self { value }
  }
}

const fn u8_4(n: u64) -> [u8; 4] {
  let [a, b, c, d, ..] = n.to_be_bytes();
  [a, b, c, d]
}

const fn u8_8(n: u64) -> [u8; 8] {
  n.to_be_bytes()
}

const fn u8_16(first: u64, second: u64) -> [u8; 16] {
  let [a, b, c, d, e, f, g, h] = first.to_be_bytes();
  let [i, j, k, l, m, n, o, p] = second.to_be_bytes();
  [a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p]
}

const fn u8_32(first: u64, second: u64, third: u64, forth: u64) -> [u8; 32] {
  let [b0, b1, b2, b3, b4, b5, b6, b7] = first.to_be_bytes();
  let [b8, b9, b10, b11, b12, b13, b14, b15] = second.to_be_bytes();
  let [b16, b17, b18, b19, b20, b21, b22, b23] = third.to_be_bytes();
  let [b24, b25, b26, b27, b28, b29, b30, b31] = forth.to_be_bytes();
  [
    b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14, b15, b16, b17, b18, b19, b20,
    b21, b22, b23, b24, b25, b26, b27, b28, b29, b30, b31,
  ]
}

const fn xor_numbers(seed: &mut u64) -> u64 {
  *seed ^= *seed << 13;
  *seed ^= *seed >> 17;
  *seed ^= *seed << 5;
  *seed
}

const fn xor_u8_4(seed: &mut u64) -> [u8; 4] {
  u8_4(xor_numbers(seed))
}

const fn xor_u8_8(seed: &mut u64) -> [u8; 8] {
  u8_8(xor_numbers(seed))
}

const fn xor_u8_16(seed: &mut u64) -> [u8; 16] {
  u8_16(xor_numbers(seed), xor_numbers(seed))
}

const fn xor_u8_32(seed: &mut u64) -> [u8; 32] {
  u8_32(xor_numbers(seed), xor_numbers(seed), xor_numbers(seed), xor_numbers(seed))
}

#[cfg(feature = "http-server-framework")]
mod http_server_framework {
  use crate::{http::server_framework::ConnAux, rng::Xorshift64};

  impl ConnAux for Xorshift64 {
    type Init = Self;

    fn conn_aux(init: Self::Init) -> crate::Result<Self> {
      Ok(init)
    }
  }
}