Expand description
Static cast the given 64-bit unsigned integer to a 64-bit signed integer. This is probably only useful when some other code provides you a u64 that is meant to be an i64 (aka. uncommon).
In C: *(int64_t *)&i
Examples
use lancelot::util::*;
assert_eq!(0, u64_i64(0));
assert_eq!(1, u64_i64(0x1));
assert_eq!(-1, u64_i64(0xFFFF_FFFF_FFFF_FFFF));