Rust implementation of CRC(16, 32, 64) with support of various standards
Add crc to Cargo.toml
[dependencies] crc = "^1.0.0"
or
[dependencies.crc] git = "https://github.com/mrhooray/crc-rs"
Add this to crate root
extern crate crc;
use crc::{crc16, Hasher16}; assert_eq!(crc16::checksum_x25(b"123456789"), 0x906e); assert_eq!(crc16::checksum_usb(b"123456789"), 0xb4c8); // use provided or custom polynomial let mut digest = crc16::Digest::new(crc16::X25); digest.write(b"123456789"); assert_eq!(digest.sum16(), 0x906e); // with initial let mut digest = crc16::Digest::new_with_initial(crc16::X25, 0u16); digest.write(b"123456789"); assert_eq!(digest.sum16(), 0x906e);
use crc::{crc32, Hasher32}; // CRC-32-IEEE being the most commonly used one assert_eq!(crc32::checksum_ieee(b"123456789"), 0xcbf43926); assert_eq!(crc32::checksum_castagnoli(b"123456789"), 0xe3069283); assert_eq!(crc32::checksum_koopman(b"123456789"), 0x2d3dd0ae); // use provided or custom polynomial let mut digest = crc32::Digest::new(crc32::IEEE); digest.write(b"123456789"); assert_eq!(digest.sum32(), 0xcbf43926); // with initial let mut digest = crc32::Digest::new_with_initial(crc32::IEEE, 0u32); digest.write(b"123456789"); assert_eq!(digest.sum32(), 0xcbf43926);
use crc::{crc64, Hasher64}; assert_eq!(crc64::checksum_ecma(b"123456789"), 0x995dc9bbdf1939fa); assert_eq!(crc64::checksum_iso(b"123456789"), 0xb90956c775a41001); // use provided or custom polynomial let mut digest = crc64::Digest::new(crc64::ECMA); digest.write(b"123456789"); assert_eq!(digest.sum64(), 0x995dc9bbdf1939fa); // with initial let mut digest = crc64::Digest::new_with_initial(crc64::ECMA, 0u64); digest.write(b"123456789"); assert_eq!(digest.sum64(), 0x995dc9bbdf1939fa);
Bencher is currently not available in Rust stable releases.
cargo bench with 2.3 GHz Intel Core i7 results ~430MB/s throughput. Comparison
cargo bench
Running target/release/bench-5c82e94dab3e9c79
running 4 tests
test bench_crc32_make_table ... bench: 439 ns/iter (+/- 82)
test bench_crc32_update_megabytes ... bench: 2327803 ns/iter (+/- 138845)
test bench_crc64_make_table ... bench: 1200 ns/iter (+/- 223)
test bench_crc64_update_megabytes ... bench: 2322472 ns/iter (+/- 92870)
test result: ok. 0 passed; 0 failed; 0 ignored; 4 measured
Licensed under either of
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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.