base16 (hex) encoding for Rust.

This is a base16 (e.g. hexadecimal) encoding and decoding library which was initially written with an emphasis on performance.

This was before Rust added SIMD, and I haven't gotten around to adding that. It's still probably the fastest non-SIMD impl, but that doesn't say much.

Usage

Add base16 = "0.1" to Cargo.toml, then:

extern crate base16;

fn main() {
    let original_msg = "Foobar";
    let hex_string = base16::encode_lower(original_msg);
    assert_eq!(hex_string, "466f6f626172");
    let decoded = base16::decode(&hex_string).unwrap();
    assert_eq!(String::from_utf8(decoded).unwrap(), original_msg);
}

More usage examples in the docs.

no_std Usage

As of 0.1.2, this crate by default has the std feature enabled, however, it may be turned off, allowing it to be used in no_std envionments. Not all functions are available without the stdlib, but each function should document whether or not it is.

License

Dual MIT/Apache2 (whichever you prefer) since that seems hip for Rust code.