19 lines
364 B
Rust
19 lines
364 B
Rust
fn crc_init() -> [u32; 256]
|
|
{
|
|
let mut t = [0; 256];
|
|
for n in 0..256
|
|
{
|
|
t[n] = (0..8).fold(n as u32, |a, _|
|
|
{if a & 1 == 1 {0xedb88320 ^ a >> 1} else {a >> 1}});
|
|
}
|
|
t
|
|
}
|
|
|
|
pub fn crc32(b: &[u8], s: u32) -> u32
|
|
{
|
|
let t = crc_init();
|
|
!b.iter().fold(!s, |a, &o| {a >> 8 ^ t[(a & 0xff ^ o as u32) as usize]})
|
|
}
|
|
|
|
// EOF
|