Rust implementation of CRC(32, 64) with support of various standards
##Usage
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::{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);
##Benchmark
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
##License MIT