https://github.com/hucsmn/qbsdiff

fast and memory saving bsdiff 4.x compatible delta compressor and patcher
https://github.com/hucsmn/qbsdiff

bsdiff delta-compression suffix-array

Last synced: 19 days ago
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fast and memory saving bsdiff 4.x compatible delta compressor and patcher

• Host: GitHub
• URL: https://github.com/hucsmn/qbsdiff
• Owner: hucsmn
• License: mit
• Created: 2019-10-17T09:17:55.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2025-12-01T02:54:29.000Z (5 months ago)
• Last Synced: 2026-01-02T10:48:09.408Z (4 months ago)
• Topics: bsdiff, delta-compression, suffix-array
• Language: Rust
• Size: 13.2 MB
• Stars: 44
• Watchers: 2
• Forks: 6
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

Awesome Lists containing this project

README

          
qbsdiff

=======

[![crates](https://img.shields.io/badge/crates-1.4.4-blue)](https://crates.io/crates/qbsdiff)

[![docs](https://img.shields.io/badge/docs-1.4.4-blue)](https://docs.rs/qbsdiff)

[![dependency status](https://deps.rs/repo/github/hucsmn/qbsdiff/status.svg)](https://deps.rs/repo/github/hucsmn/qbsdiff)

Fast and memory saving bsdiff 4.x compatible delta compressor and patcher.

Add dependency to `Cargo.toml`:

```toml

[dependencies]

qbsdiff = "1.4"

```

Build commands

--------------

Build `qbsdiff` and `qbspatch` commands:

```shell

$ cargo build --release --bins --features cmd

$ cd target/release

$ ./qbsdiff --help

$ ./qbspatch --help

```

Install commands to `$CARGO_HOME/bin`:

```shell

$ cargo install qbsdiff --features cmd

```

Examples

--------

Produce the target stream by applying `patch` to `source`:

```rust

use std::io;

use qbsdiff::Bspatch;

fn bspatch(source: &[u8], patch: &[u8]) -> io::Result> {

    let patcher = Bspatch::new(patch)?;

    let mut target = Vec::new();

    // To preallocate target:

    //Vec::with_capacity(patcher.hint_target_size() as usize);

    patcher.apply(source, io::Cursor::new(&mut target))?;

    Ok(target)

}

```

Produce the patch data by comparing `source` with `target`:

```rust

use std::io;

use qbsdiff::Bsdiff;

fn bsdiff(source: &[u8], target: &[u8]) -> io::Result> {

    let mut patch = Vec::new();

    Bsdiff::new(source, target)

        .compare(io::Cursor::new(&mut patch))?;

    Ok(patch)

}

```

Note that `qbsdiff` would not generate exactly the same patch file as `bsdiff`.

Only the patch file format is promised to be compatible.