Function polars_arrow::bitmap::utils::align_bitslice_start_u8

pub fn align_bitslice_start_u8(
    slice: &[u8],
    offset: usize,
    len: usize
) -> (u8, usize, &[u8], usize)

Takes the given slice of bytes plus a bit offset and bit length and returns the slice so that it starts at a byte-aligned boundary.

Returns (in order):

• the bits of the first byte if it isn’t a full byte
• the number of bits in the first partial byte
• the rest of the bits as a byteslice
• the number of bits in the byteslice