Trait subtle::ConstantTimeGreater
source · [−]Expand description
A type which can be compared in some manner and be determined to be greater than another of the same type.
Required methods
Determine whether self > other
.
The bitwise-NOT of the return value of this function should be usable to
determine if self <= other
.
This function should execute in constant time.
Returns
A Choice
with a set bit if self > other
, and with no set bits
otherwise.
Example
use subtle::ConstantTimeGreater;
let x: u8 = 13;
let y: u8 = 42;
let x_gt_y = x.ct_gt(&y);
assert_eq!(x_gt_y.unwrap_u8(), 0);
let y_gt_x = y.ct_gt(&x);
assert_eq!(y_gt_x.unwrap_u8(), 1);
let x_gt_x = x.ct_gt(&x);
assert_eq!(x_gt_x.unwrap_u8(), 0);