Rust实现bspatch功能：使用bsdiff库进行差分合并

以下是一个使用Rust语言实现类似bspatch的程序的示例代码：

extern crate bsdiff;

use std::fs::File;
use std::io::{Read, Write};
use std::path::Path;

fn main() {
    let old_file_path = Path::new('old_file');
    let new_file_path = Path::new('new_file');
    let patch_file_path = Path::new('patch_file');

    let mut old_file = File::open(old_file_path).unwrap();
    let mut new_file = File::create(new_file_path).unwrap();
    let mut patch_file = File::open(patch_file_path).unwrap();

    let mut old_file_data = Vec::new();
    old_file.read_to_end(&mut old_file_data).unwrap();

    let mut patch_data = Vec::new();
    patch_file.read_to_end(&mut patch_data).unwrap();

    let new_file_data = bsdiff::patch(&old_file_data, &patch_data).unwrap();

    new_file.write_all(&new_file_data).unwrap();
}

这个程序使用了bsdiff库来实现差分合并功能。您需要在'Cargo.toml'文件中添加以下依赖包：

[dependencies]
bsdiff = '0.2'