#no-std #encoding #base64 #const-fn

no-std const_base

Decoding/encoding base 64/32/16 strings at compile-time

3 releases

0.1.2 Aug 15, 2021
0.1.1 Aug 12, 2021
0.1.0 Aug 10, 2021

#724 in Encoding

21 downloads per month

Zlib license

84KB
2K SLoC

Rust crates-io api-docs

For decoding/encoding base 64/32/16 strings at compile-time.

Examples

Encoding

use const_base::{encode, encode_as_str, Config};

{
    // the encoding macros can take both `&str` and `&[u8]` constants.
    const OUTA: &[u8; 4] = encode!("foo", Config::B64);
    const OUTB: &[u8; 4] = encode!(b"foo", Config::B64);
    
    assert_eq!(OUTA, b"Zm9v");
    assert_eq!(OUTB, b"Zm9v");
}
{
    const BYTES: &[u8] = b"hello";

    // the encoding macros can encode non-literal constants
    const OUT: &str = encode_as_str!(BYTES, Config::B64_URL_SAFE);
    
    assert_eq!(OUT, "aGVsbG8=");
}

Decoding

use const_base::{decode, Config};

{
    const OUT: &[u8] = decode!("MZXW6===", Config::B32);
    
    assert_eq!(OUT, b"foo");
}
{
    const BYTES: &[u8] = b"f000";

    // this macro can decode non-literal constants
    const OUT: &[u8] = decode!(BYTES, Config::HEX);
    
    assert_eq!(OUT, &[0xF0, 0x00]);
}

No-std support

const_base is #![no_std], it can be used anywhere Rust can be used.

Minimum Supported Rust Version

const_base requires Rust 1.51.0, because it uses const generics.

No runtime deps