mirror of https://github.com/dswd/zvault
87 lines
2.5 KiB
Rust
87 lines
2.5 KiB
Rust
pub use chunking::*;
|
|
|
|
use std::str::FromStr;
|
|
|
|
|
|
#[derive(Debug, Clone, Copy, Eq, PartialEq)]
|
|
pub enum ChunkerType {
|
|
Ae(usize),
|
|
Rabin((usize, u32)),
|
|
FastCdc((usize, u64)),
|
|
Fixed(usize)
|
|
}
|
|
serde_impl!(ChunkerType(u64) {
|
|
Ae(usize) => 1,
|
|
Rabin((usize, u32)) => 2,
|
|
FastCdc((usize, u64)) => 3,
|
|
Fixed(usize) => 4
|
|
});
|
|
|
|
|
|
impl ChunkerType {
|
|
pub fn from(name: &str, avg_size: usize, seed: u64) -> Result<Self, &'static str> {
|
|
match name {
|
|
"ae" => Ok(ChunkerType::Ae(avg_size)),
|
|
"rabin" => Ok(ChunkerType::Rabin((avg_size, seed as u32))),
|
|
"fastcdc" => Ok(ChunkerType::FastCdc((avg_size, seed))),
|
|
"fixed" => Ok(ChunkerType::Fixed(avg_size)),
|
|
_ => Err(tr!("Unsupported chunker type")),
|
|
}
|
|
}
|
|
|
|
pub fn from_string(name: &str) -> Result<Self, &'static str> {
|
|
let (name, size) = if let Some(pos) = name.find('/') {
|
|
let size = try!(usize::from_str(&name[pos + 1..]).map_err(
|
|
|_| tr!("Chunk size must be a number")
|
|
));
|
|
let name = &name[..pos];
|
|
(name, size)
|
|
} else {
|
|
(name, 8)
|
|
};
|
|
Self::from(name, size * 1024, 0)
|
|
}
|
|
|
|
|
|
#[inline]
|
|
pub fn create(&self) -> Box<Chunker> {
|
|
match *self {
|
|
ChunkerType::Ae(size) => Box::new(AeChunker::new(size)),
|
|
ChunkerType::Rabin((size, seed)) => Box::new(RabinChunker::new(size, seed)),
|
|
ChunkerType::FastCdc((size, seed)) => Box::new(FastCdcChunker::new(size, seed)),
|
|
ChunkerType::Fixed(size) => Box::new(FixedChunker::new(size)),
|
|
}
|
|
}
|
|
|
|
pub fn name(&self) -> &'static str {
|
|
match *self {
|
|
ChunkerType::Ae(_size) => "ae",
|
|
ChunkerType::Rabin((_size, _seed)) => "rabin",
|
|
ChunkerType::FastCdc((_size, _seed)) => "fastcdc",
|
|
ChunkerType::Fixed(_size) => "fixed",
|
|
}
|
|
}
|
|
|
|
pub fn avg_size(&self) -> usize {
|
|
match *self {
|
|
ChunkerType::Ae(size) |
|
|
ChunkerType::Fixed(size) => size,
|
|
ChunkerType::Rabin((size, _seed)) => size,
|
|
ChunkerType::FastCdc((size, _seed)) => size,
|
|
}
|
|
}
|
|
|
|
pub fn to_string(&self) -> String {
|
|
format!("{}/{}", self.name(), self.avg_size() / 1024)
|
|
}
|
|
|
|
pub fn seed(&self) -> u64 {
|
|
match *self {
|
|
ChunkerType::Ae(_size) |
|
|
ChunkerType::Fixed(_size) => 0,
|
|
ChunkerType::Rabin((_size, seed)) => u64::from(seed),
|
|
ChunkerType::FastCdc((_size, seed)) => seed,
|
|
}
|
|
}
|
|
}
|