diff options
Diffstat (limited to 'src/block.rs')
| -rw-r--r-- | src/block.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/block.rs b/src/block.rs index 96c3496..8327286 100644 --- a/src/block.rs +++ b/src/block.rs @@ -12,6 +12,18 @@ pub struct Block(u8x16); #[cfg(not(feature = "simd"))] pub struct Block([u8; 16]); +macro_rules! add_ladder { + ($ar:expr, $lit:literal) => { + $ar[$lit] = $ar[$lit].wrapping_add(1); + }; + ($ar:expr, $lit:literal $($rest:literal) +) => { + $ar[$lit] = $ar[$lit].wrapping_add(1); + if $ar[$lit] == 0 { + add_ladder!($ar, $($rest) +); + } + }; +} + impl Block { pub fn null() -> Block { Block([0; 16].into()) @@ -95,6 +107,10 @@ impl Block { _ => (*self * 2).exp(exponent - 1), } } + + pub fn count_up(&mut self) { + add_ladder!(self, 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0); + } } impl From<[u8; 16]> for Block { |