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204use std::fmt::{Debug, Formatter};
use bitvec::bitvec;
use bitvec::order::Lsb0;
use bitvec::vec::BitVec;
use crate::hamming::Hamming;
pub struct Raid2 {
strips: Vec<Hamming>,
disk_cnt: u8,
disk_size: usize,
}
impl Raid2 {
pub fn new(disk_cnt: u8, disk_size: usize) -> Self {
Raid2 {
strips: vec![Hamming::new(disk_cnt); disk_size],
disk_cnt,
disk_size,
}
}
pub fn get_disks(&self) -> Vec<BitVec<u8>> {
let mut data = vec![bitvec![u8, Lsb0; 0; self.disk_size]; self.disk_cnt as usize];
for (i, strip) in self.strips.iter().enumerate() {
for (j, bit) in strip.read_all().iter().enumerate() {
data[j].set(i, *bit);
}
}
data
}
pub fn get_disks_with_ec(&mut self) -> Vec<BitVec<u8>> {
let mut data = vec![bitvec![u8, Lsb0; 0; self.disk_size]; self.disk_cnt as usize];
for (i, strip) in self.strips.iter_mut().enumerate() {
for (j, bit) in strip.read_all_with_ec().iter().enumerate() {
data[j].set(i, *bit);
}
}
data
}
pub fn read(&self, disk_index: u8, local_address: usize) -> bool {
(&self.strips[local_address]).read(disk_index)
}
pub fn read_with_ec(&mut self, disk_index: u8, local_address: usize) -> bool {
(&mut self.strips[local_address]).read_with_ec(disk_index)
}
pub fn write(&mut self, disk_index: u8, local_address: usize, value: bool) {
(&mut self.strips[local_address]).write(disk_index, value)
}
pub fn delete(&mut self, disk_index: u8, local_address: usize) {
self.write(disk_index, local_address, false)
}
pub fn check(&self) -> bool { self.strips.iter().all(Hamming::check) }
}
impl Debug for Raid2 {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
self.strips.iter().map(|h| write!(f, "{}\n", h.read_all())).collect()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_new() {
let raid2 = Raid2::new(4, 128);
assert_eq!(raid2.disk_cnt, 4);
assert_eq!(raid2.disk_size, 128);
assert_eq!(raid2.strips, vec![Hamming::new(4); 128]);
}
#[test]
fn test_check_true() {
let raid2 = Raid2::new(4, 128);
assert!(raid2.check());
}
#[test]
fn test_check_false() {
let mut raid2 = Raid2::new(4, 128);
raid2.strips[0].code.set(2, true);
assert!(!raid2.check());
}
#[test]
fn test_get_disks() {
let raid2 = Raid2::new(4, 128);
assert_eq!(raid2.get_disks(), vec![bitvec![u8, Lsb0; 0; 128]; 4]);
}
#[test]
fn test_read_all_with_ec() {
let mut raid2 = Raid2::new(4, 128);
raid2.strips[0].code.set(2, true);
assert_eq!(raid2.get_disks_with_ec(), vec![bitvec![u8, Lsb0; 0; 128]; 4]);
assert_eq!(raid2.strips, vec![Hamming::new(4); 128]);
}
#[test]
fn test_read() {
let raid2 = Raid2::new(4, 128);
assert_eq!(raid2.read(0, 0), false);
assert_eq!(raid2.read(0, 1), false);
assert_eq!(raid2.read(2, 3), false);
}
#[test]
#[should_panic]
fn test_panic_on_read() {
let raid2 = Raid2::new(4, 128);
raid2.read(100, 100);
}
#[test]
fn test_read_with_ec() {
let mut raid2 = Raid2::new(4, 128);
raid2.strips[0].code.set(2, true);
assert_eq!(raid2.read_with_ec(0, 0), false);
assert_eq!(raid2.read_with_ec(0, 1), false);
assert_eq!(raid2.read_with_ec(2, 3), false);
assert_eq!(raid2.strips, vec![Hamming::new(4); 128]);
}
#[test]
#[should_panic]
fn test_panic_on_read_with_ec() {
let mut raid2 = Raid2::new(4, 128);
raid2.read_with_ec(100, 100);
}
#[test]
fn test_write() {
let mut raid2 = Raid2::new(4, 8);
raid2.write(0, 2, true);
assert_eq!(
raid2.strips,
vec![
Hamming::new(4),
Hamming::new(4),
Hamming::from_buffer(&[true, false, false, false]),
Hamming::new(4),
Hamming::new(4),
Hamming::new(4),
Hamming::new(4),
Hamming::new(4),
]
);
}
#[test]
#[should_panic]
fn test_panic_on_write() {
let mut raid2 = Raid2::new(4, 128);
raid2.write(100, 100, true);
}
#[test]
fn test_delete() {
let mut raid2 = Raid2::new(4, 128);
raid2.write(0, 2, true);
raid2.delete(0, 2);
assert_eq!(raid2.strips, vec![Hamming::new(4); 128]);
}
#[test]
#[should_panic]
fn test_panic_on_delete() {
let mut raid2 = Raid2::new(4, 128);
raid2.delete(100, 100);
}
}