Function base64::engine::general_purpose::decode_suffix::decode_suffix

pub(crate) fn decode_suffix(
    input: &[u8],
    input_index: usize,
    output: &mut [u8],
    output_index: usize,
    decode_table: &[u8; 256],
    decode_allow_trailing_bits: bool,
    padding_mode: DecodePaddingMode,
) -> Result<DecodeMetadata, DecodeSliceError>

Decode the last 0-4 bytes, checking for trailing set bits and padding per the provided parameters.

Returns the decode metadata representing the total number of bytes decoded, including the ones indicated as already written by output_index.