blake2b 0.5.2

use std::ops::{Add, BitXor};

#[allow(non_camel_case_types)]
#[derive(Clone, Copy)]
pub struct u64x4(pub u64, pub u64, pub u64, pub u64);

impl u64x4 {
	pub fn rotate_right(self, r: u64) -> Self {
		debug_assert!(r <= 64);

		let l = 64 - r;
		u64x4(self.0 >> r, self.1 >> r, self.2 >> r, self.3 >> r) ^ u64x4(self.0 << l, self.1 << l, self.2 << l, self.3 << l)
	}

	pub fn shuffle_left_1(self) -> Self {
		u64x4(self.1, self.2, self.3, self.0)
	}

	pub fn shuffle_left_2(self) -> Self {
		u64x4(self.2, self.3, self.0, self.1)
	}

	pub fn shuffle_left_3(self) -> Self {
		u64x4(self.3, self.0, self.1, self.2)
	}

	pub fn shuffle_right_1(self) -> Self {
		self.shuffle_left_3()
	}

	pub fn shuffle_right_2(self) -> Self {
		self.shuffle_left_2()
	}

	pub fn shuffle_right_3(self) -> Self {
		self.shuffle_left_1()
	}
}

impl Add for u64x4 {
	type Output = Self;

	fn add(self, rhs: Self) -> Self::Output {
		u64x4(
			self.0.wrapping_add(rhs.0),
			self.1.wrapping_add(rhs.1),
			self.2.wrapping_add(rhs.2),
			self.3.wrapping_add(rhs.3)
		)
	}
}

impl BitXor<u64x4> for u64x4 {
	type Output = Self;

	fn bitxor(self, rhs: Self) -> Self::Output {
		u64x4(
			self.0 ^ rhs.0,
			self.1 ^ rhs.1,
			self.2 ^ rhs.2,
			self.3 ^ rhs.3
		)
	}
}