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// Copyright 2022-2024 Gabriel Bjørnager Jensen.
use crate::deserialise::{Deserialise, DStream};
use crate::serialise::{SStream, Serialise};
use sha2::{Digest, Sha256};
use std::fmt::{Debug, Display, Formatter};
#[derive(Clone, Eq, PartialEq)]
#[repr(transparent)]
pub struct Checksum(pub(in super) [u8; 0x20]);
impl Checksum {
#[must_use]
pub fn new<T: Serialise>(data: &T) -> Self {
let data = SStream::from(data);
let mut hasher = Sha256::new();
hasher.update(data);
Self(hasher.finalize().into())
}
}
impl Debug for Checksum {
#[inline(always)]
fn fmt(&self, f: &mut Formatter) -> std::fmt::Result { Display::fmt(self, f) }
}
impl Deserialise for Checksum {
fn deserialise(stream: &mut DStream) -> Result<Self, Box<dyn std::error::Error>> {
let data = Deserialise::deserialise(stream)?;
Ok(Self(data))
}
}
impl Display for Checksum {
fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
write!(f,
"{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}{:x}",
self.0[0x1F], self.0[0x1E], self.0[0x1D], self.0[0x1C],
self.0[0x1B], self.0[0x1A], self.0[0x19], self.0[0x18],
self.0[0x17], self.0[0x16], self.0[0x15], self.0[0x14],
self.0[0x13], self.0[0x12], self.0[0x11], self.0[0x10],
self.0[0x0F], self.0[0x0E], self.0[0x0D], self.0[0x0C],
self.0[0x0B], self.0[0x0A], self.0[0x09], self.0[0x08],
self.0[0x07], self.0[0x06], self.0[0x05], self.0[0x04],
self.0[0x03], self.0[0x02], self.0[0x01], self.0[0x00],
)
}
}
impl Serialise for Checksum {
fn serialise(&self, stream: &mut SStream) {
self.0.serialise(stream);
}
}
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