Function decode_into_unchecked 

pub unsafe fn decode_into_unchecked(
    input: &[u8],
    output: &mut [MaybeUninit<u8>],
) -> Result<usize, usize>

Decode base64-encoded input into the provided slice without validating its length.

On success Result::Ok containing the amount of bytes written is returned. Otherwise, Result::Err containing the offset of the first invalid input byte is returned.

Safety

• output’s length must be AT LEAST input.len() * 3 / 4

Example

use weakauras_codec_base64::decode;

let input = b"ivgBS9glGC3BYXgzHa";
let required_capacity = decode::calculate_decoded_len(input).unwrap();
let mut output = Vec::with_capacity(required_capacity);

// SAFETY:
// - buffer's capacity is enough for storing decoded base64-input;
// - decode_into_unchecked returns the amount of bytes written,
//   thus it is safe to call set_len using its return value.
unsafe {
    let bytes_written =
        decode::decode_into_unchecked(input, output.spare_capacity_mut()).unwrap();
    output.set_len(bytes_written);
}

assert_eq!(output, b"Hello, world!");