crc ![Build Status](https://travis-ci.org/mrhooray/crc-rs.svg?branch=master)
Rust implementation of CRC(32, 64) with support of various standards
##Usage
Add crc
to Cargo.toml
[dependencies]
crc = "^0.3.1"
or
[dependencies.crc]
git = "https://github.com/mrhooray/crc-rs"
Add this to crate root
extern crate crc;
Compute CRC32
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);
Compute CRC64
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);
##Benchmark
cargo bench
with 2.3 GHz Intel Core i7 results ~430MB/s throughput. Comparison
cargo bench
Running target/release/crc-ef3fd4a2422fe338
running 14 tests
test crc32::tests::test_checksum_castagnoli ... ignored
test crc32::tests::test_checksum_ieee ... ignored
test crc32::tests::test_checksum_koopman ... ignored
test crc32::tests::test_digest_castagnoli ... ignored
test crc32::tests::test_digest_ieee ... ignored
test crc32::tests::test_digest_koopman ... ignored
test crc64::tests::test_checksum_ecma ... ignored
test crc64::tests::test_checksum_iso ... ignored
test crc64::tests::test_digest_ecma ... ignored
test crc64::tests::test_digest_iso ... ignored
test crc32::tests::bench_make_table ... bench: 2511 ns/iter (+/- 1256)
test crc32::tests::bench_update_megabytes ... bench: 2307480 ns/iter (+/- 483053)
test crc64::tests::bench_make_table ... bench: 2510 ns/iter (+/- 928)
test crc64::tests::bench_update_megabytes ... bench: 2298012 ns/iter (+/- 78780)
test result: ok. 0 passed; 0 failed; 10 ignored; 4 measured
##TODO
##License MIT