# My CRC
[](https://crates.io/crates/mycrc)
[](https://docs.rs/mycrc)
Create your own cyclic redundancy check (CRC).
## Getting Started
1. Create your own CRC using [`CRC::new`].
2. Create checksum from message.
- [`CRC::checksum`]
- [`CRC::initialize`] -> -> [`CRC::calc_bytes`] -> ... -> [`CRC::calc_bytes`] -> [`CRC::finalize`]
3. Use [`CRC::is_error_free`] to check if bytes [message + checksum] are error-free.
### Example
```rust
use mycrc::{Algorithm, CRC, Endian};
// message
const CHECK_BYTES: &[u8] = b"123456789";
// Create your own CRC.
let mut crc32c = CRC::<u32>::new(
Endian::Little, // endian
0x1edc6f41, // poly
0xffffffff, // init
true, // refin
true, // refout
0xffffffff, // xorout
);
// Checksum
assert_eq!(crc32c.checksum(CHECK_BYTES), 0xe3069283);
// Is error free?
let checksum = crc32c.checksum_to_endian_bytes(CHECK_BYTES);
let bytes = [CHECK_BYTES, &checksum].concat();
assert!(crc32c.is_error_free(&bytes));
```