crc
Rust implementation of CRC(32, 64)
##Usage
Add crc
to Cargo.toml
[dependencies]
crc = "0.2.0"
or
[dependencies.crc]
git = "https://github.com/mrhooray/crc-rs"
Add this to crate root
extern crate crc;
Compute CRC32
use crc::crc32;
println!("{:x}", crc32::checksum_castagnoli(&b"123456789")); // -> 0xe3069283
println!("{:x}", crc32::checksum_ieee(&b"123456789")); // -> 0xcbf43926
println!("{:x}", crc32::checksum_koopman(&b"123456789")); // -> 0x2d3dd0ae
// use provided or custom polynomial
let mut digest = crc32::Digest::new(crc32::IEEE);
digest.write(&b"123456789");
println!("{:x}", digest.sum32()); // -> 0xcbf43926
Compute CRC64
use crc::crc64;
println!("{:x}", crc64::checksum_ecma(&b"123456789")); // -> 0x995dc9bbdf1939fa
println!("{:x}", crc64::checksum_iso(&b"123456789")); // -> 0xb90956c775a41001
// use provided or custom polynomial
let mut digest = crc64::Digest::new(crc64::ECMA);
digest.write(&b"123456789");
println!("{:x}", digest.sum64()); // -> 0x995dc9bbdf1939fa
##Benchmark
cargo bench
with 2.3 GHz Intel Core i7 results ~400MB/s throughput. Comparison
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: 447 ns/iter (+/- 81)
test crc32::tests::bench_update_megabytes ... bench: 2479741 ns/iter (+/- 183031)
test crc64::tests::bench_make_table ... bench: 1166 ns/iter (+/- 93)
test crc64::tests::bench_update_megabytes ... bench: 2478464 ns/iter (+/- 68731)
test result: ok. 0 passed; 0 failed; 10 ignored; 4 measured
##TODO
- rustdoc
- Slicing-by-4/8/16 Implementation
##License MIT