A `const fn` implementation of the crc32 checksum algorithm.

Rom's 9c688f3ad1 remove nightly feature		2 years ago
src	remove nightly feature	2 years ago
.gitignore	initial commit	2 years ago
Cargo.toml	increase #[const_eval_limit] to avoid compilation errors for larger byte slices	2 years ago
LICENSE	initial commit	2 years ago
README.md	increase #[const_eval_limit] to avoid compilation errors for larger byte slices	2 years ago

README.md

const-crc32

A const fn crc32 checksum implementation.

Examples

const BYTES: &[u8] = "The quick brown fox jumps over the lazy dog".as_bytes();
const CKSUM: u32 = const_crc32::crc32(BYTES);
assert_eq!(CKSUM, 0x414fa339_u32);

Usage

This is a naive implementation that should be expected to have poor performance if used on dynamic data at runtime. Usage should generally be restricted to declaring const variables based on static or const data available at build time.

`#[const_eval_limit]`

This crate sets #[const_eval_limit] to 1,000,000,000 to avoid hitting the limit when executing the const fn, which requires #![feature(const_eval_limit)].

Compile time for const data around 100k is less than 1s.