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#![no_std]
#![forbid(
warnings,
future_incompatible,
rust_2018_idioms,
rustdoc,
unused,
missing_copy_implementations,
missing_debug_implementations,
missing_docs,
trivial_casts,
trivial_numeric_casts,
unsafe_code,
unused_results,
clippy::all
)]
#[inline]
pub fn calculate<T: AsRef<[u8]>>(input: T) -> (u32, u32) {
const MASK: u32 = 0b1_1111;
let bytes = input.as_ref();
let (left, right) = bytes.split_at(bytes.len() >> 1);
let (mut a, mut b, mut shift) = (0, 0, 0);
for &n in left {
a ^= u32::from(n) << shift;
shift = (shift + 8) & MASK;
}
shift = 0;
for &n in right {
let temp = u32::from(n) << shift;
b = (b ^ temp).rotate_right(temp & MASK);
shift = (shift + 8) & MASK;
}
(a, b)
}
#[cfg(test)]
mod tests {
include!("../bsa_lists/morrowind.rs");
include!("../bsa_lists/tribunal.rs");
include!("../bsa_lists/bloodmoon.rs");
#[inline]
fn test_hashes(list: &[(&str, u32, u32)]) {
for &(filename, left_hash, right_hash) in list {
assert_eq!(super::calculate(filename), (left_hash, right_hash));
}
}
#[test]
fn morrowind_bsa() {
test_hashes(MORROWIND_BSA);
}
#[test]
fn tribunal_bsa() {
test_hashes(TRIBUNAL_BSA);
}
#[test]
fn bloodmoon_bsa() {
test_hashes(BLOODMOON_BSA);
}
}