Jeremy Soller
53 lines
998 B
Rust
53 lines
998 B
Rust
use core::cmp::min;
|
|
|
|
pub struct BlockIter {
|
|
block: u64,
|
|
length: u64,
|
|
i: u64
|
|
}
|
|
|
|
impl Iterator<> for BlockIter {
|
|
type Item = (u64, usize);
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
if self.i < (self.length + 511)/512 {
|
|
let ret = Some((self.block + self.i, min(512, self.length - self.i * 512) as usize));
|
|
self.i += 1;
|
|
ret
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
}
|
|
|
|
/// A disk extent
|
|
#[derive(Copy, Clone, Debug, Default)]
|
|
#[repr(packed)]
|
|
pub struct Extent {
|
|
pub block: u64,
|
|
pub length: u64,
|
|
}
|
|
|
|
impl Extent {
|
|
pub fn default() -> Extent {
|
|
Extent {
|
|
block: 0,
|
|
length: 0
|
|
}
|
|
}
|
|
|
|
pub fn new(block: u64, length: u64) -> Extent {
|
|
Extent {
|
|
block: block,
|
|
length: length
|
|
}
|
|
}
|
|
|
|
pub fn blocks(&self) -> BlockIter {
|
|
BlockIter {
|
|
block: self.block,
|
|
length: self.length,
|
|
i: 0
|
|
}
|
|
}
|
|
}
|