crc 3.0.1

Rust implementation of CRC with support of various standards


rust Crate Docs License

Rust implementation of CRC. MSRV is 1.46.


Add crc to Cargo.toml

crc = "3.0"

Compute CRC

use crc::{Crc, Algorithm, CRC_16_IBM_SDLC, CRC_32_ISCSI};

pub const X25: Crc<u16> = Crc::<u16>::new(&CRC_16_IBM_SDLC);
pub const CASTAGNOLI: Crc<u32> = Crc::<u32>::new(&CRC_32_ISCSI);

assert_eq!(X25.checksum(b"123456789"), 0x906e);
assert_eq!(CASTAGNOLI.checksum(b"123456789"), 0xe3069283);

// use custom algorithm
const CUSTOM_ALG: Algorithm<u16> = Algorithm {
    width: 16,
    poly: 0x8005,
    init: 0xffff,
    refin: false,
    refout: false,
    xorout: 0x0000,
    check: 0xaee7,
    residue: 0x0000
let crc = Crc::<u16>::new(&CUSTOM_ALG);
let mut digest = crc.digest();
assert_eq!(digest.finalize(), 0xaee7);


cargo bench with 2.6 GHz Intel Core i7. Comparison

crc16          time:   [2.0082 ms 2.0206 ms 2.0367 ms]
               thrpt:  [468.25 MiB/s 471.96 MiB/s 474.89 MiB/s]

crc32          time:   [1.7659 ms 1.7793 ms 1.7952 ms]
               thrpt:  [531.25 MiB/s 535.98 MiB/s 540.05 MiB/s]

crc64          time:   [2.0655 ms 2.0803 ms 2.0973 ms]
               thrpt:  [454.71 MiB/s 458.43 MiB/s 461.72 MiB/s]


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Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.