pub fn u64_digits(buf: &mut [u8; 21], n: u64) -> &[u8] ⓘExpand description
The decimal digits of n, written into the back of buf.
The unsigned form, for the numbers that genuinely do not fit in an i64. A
scan cursor is one: ours packs a partition count into the top bits, so a
large enough collection hands the client a number with bit 63 set and
reporting it as a signed integer would report it as negative.