mirror of https://github.com/dswd/zvault
52 lines
1.4 KiB
Rust
52 lines
1.4 KiB
Rust
#[macro_use] extern crate quick_error;
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use std::io::{self, Write, Read};
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mod ae;
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mod rabin;
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mod fastcdc;
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pub use self::ae::AeChunker;
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pub use self::rabin::RabinChunker;
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pub use self::fastcdc::FastCdcChunker;
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// https://moinakg.wordpress.com/2013/06/22/high-performance-content-defined-chunking/
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// Paper: "A Comprehensive Study of the Past, Present, and Future of Data Deduplication"
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// Paper-URL: http://wxia.hustbackup.cn/IEEE-Survey-final.pdf
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// https://borgbackup.readthedocs.io/en/stable/internals.html#chunks
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// https://github.com/bup/bup/blob/master/lib/bup/bupsplit.c
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quick_error!{
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#[derive(Debug)]
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pub enum ChunkerError {
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Read(err: io::Error) {
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cause(err)
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description("Failed to read input")
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display("Chunker error: failed to read input\n\tcaused by: {}", err)
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}
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Write(err: io::Error) {
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cause(err)
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description("Failed to write to output")
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display("Chunker error: failed to write to output\n\tcaused by: {}", err)
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}
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Custom(reason: &'static str) {
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from()
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description("Custom error")
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display("Chunker error: {}", reason)
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}
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}
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}
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#[derive(Debug, Eq, PartialEq)]
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pub enum ChunkerStatus {
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Continue,
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Finished
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}
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pub trait Chunker {
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fn chunk(&mut self, r: &mut Read, w: &mut Write) -> Result<ChunkerStatus, ChunkerError>;
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}
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