Trait base2::Base2

source · 
pub trait Base2 {
    fn floor_log2(self) -> u8;
    fn exp2(p: u8) -> Self;
    fn mask(p: u8) -> Self;
}

Required Methods§

floor(log(2, v))

Examples

use base2::Base2;
assert_eq!(0_u8.floor_log2(), 0);
assert_eq!(1_u16.floor_log2(), 0);
assert_eq!(2_u32.floor_log2(), 1);
assert_eq!(3_u64.floor_log2(), 1);
assert_eq!(4_u128.floor_log2(), 2);
assert_eq!(5_u8.floor_log2(), 2);
assert_eq!(6_u8.floor_log2(), 2);
assert_eq!(7_u16.floor_log2(), 2);
assert_eq!(8_usize.floor_log2(), 3);
assert_eq!(9_u16.floor_log2(), 3);
assert_eq!(0xFF_u8.floor_log2(), 7);
assert_eq!(u128::max_value().floor_log2(), 127);

2^p

Examples

use base2::Base2;
assert_eq!(u8::exp2(0), 1);
assert_eq!(u16::exp2(1), 2);
assert_eq!(u32::exp2(2), 4);
assert_eq!(u64::exp2(3), 8);
assert_eq!(u128::exp2(4), 16);
assert_eq!(usize::exp2(5), 32);

A mask with a p number of bits.

use base2::Base2;
assert_eq!(u8::mask(0), 0);
assert_eq!(u16::mask(1), 1);
assert_eq!(u32::mask(2), 0b11);
assert_eq!(u64::mask(3), 0b111);
assert_eq!(u128::mask(4), 0b1111);
assert_eq!(usize::mask(5), 0b11111);
assert_eq!(u8::mask(8), 0b1111_1111);

Implementors§