jerky 0.9.0

Succinct on-disk data structures in Rust
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

#![cfg(target_pointer_width = "64")]
#![cfg(feature = "intrinsics")]

#[inline(always)]
pub const fn popcount(x: usize) -> usize {
    x.count_ones() as usize
}

#[inline(always)]
pub const fn bsf64(mask: usize) -> Option<usize> {
    if mask != 0 {
        Some(mask.trailing_zeros() as usize)
    } else {
        None
    }
}

#[inline(always)]
pub const fn bsr64(mask: usize) -> Option<usize> {
    if mask != 0 {
        Some(63 - mask.leading_zeros() as usize)
    } else {
        None
    }
}