crc

Rust implementation of CRC(16, 32, 64)

Usage

Add crc to Cargo.toml toml [dependencies] crc = "2.0"

Compute CRC

```rust use crc::{Crc, Algorithm, CRC16IBMSDLC, CRC32_ISCSI};

pub const X25: Crc = Crc::::new(&CRC16IBMSDLC); pub const CASTAGNOLI: Crc = Crc::::new(&CRC32_ISCSI);

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

// use custom algorithm const CUSTOMALG: Algorithm = Algorithm { poly: 0x8005, init: 0xffff, refin: false, refout: false, xorout: 0x0000, check: 0xaee7, residue: 0x0000 }; let crc = Crc::::new(&CUSTOMALG); let mut digest = crc.digest(); digest.update(b"123456789"); assert_eq!(digest.finalize(), 0xaee7); ```

Benchmark

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] ```

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT License (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

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.