pub fn encode_bigint(value: i64) -> [u8; 8]Expand description
Encodes a BigInt for lexicographic ordering.
Uses sign-flip encoding: XOR the high byte with 0x80 so that negative numbers sort before positive numbers in byte order.
i64::MIN (-9223372036854775808) -> 0x00_00_00_00_00_00_00_00
-1 -> 0x7F_FF_FF_FF_FF_FF_FF_FF
0 -> 0x80_00_00_00_00_00_00_00
1 -> 0x80_00_00_00_00_00_00_01
i64::MAX (9223372036854775807) -> 0xFF_FF_FF_FF_FF_FF_FF_FF