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add From<u64> for Hash #17

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add From<u64> for Hash #17

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10 changes: 9 additions & 1 deletion src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,14 @@ impl Into<u64> for Hash {
}
}

/// Get a `Hash` value from its hash value.
impl From<u64> for Hash {
#[inline]
fn from(hash: u64) -> Self {
Hash { hash }
}
}

/// Calculate the difference of two hashes.
impl ops::Sub for Hash {
type Output = Difference;
Expand Down Expand Up @@ -105,7 +113,7 @@ impl Difference {
#[inline]
pub fn dist(self) -> u32 {
(self.xor as u8).count_ones() as u32
+ ((self.xor >> 8 ) as u8).count_ones() as u32 * 2
+ ((self.xor >> 8) as u8).count_ones() as u32 * 2
+ ((self.xor >> 16) as u8).count_ones() as u32 * 3
+ ((self.xor >> 24) as u8).count_ones() as u32 * 5
+ ((self.xor >> 32) as u8).count_ones() as u32 * 8
Expand Down