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::withcapacity(patcher.hinttarget_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.