└── hash


/hash:
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 1 | use sha2::{Digest, Sha256};
 2 | use std::fs::File;
 3 | use std::io::{BufReader, Read};
 4 | use std::sync::{Arc, Mutex};
 5 | use std::thread;
 6 | 
 7 | fn hash_file(path: &str) -> String {
 8 |     let file = File::open(path).unwrap();
 9 |     let mut reader = BufReader::new(file);
10 |     let mut hasher = Sha256::new();
11 |     let mut buffer = [0; 1024];
12 | 
13 |     while let Ok(bytes) = reader.read(&mut buffer) {
14 |         if bytes == 0 {
15 |             break;
16 |         }
17 |         hasher.update(&buffer[..bytes]);
18 |     }
19 | 
20 |     format!("{:x}", hasher.finalize())
21 | }
22 | 
23 | fn main() {
24 |     let paths = vec!["file1.txt", "file2.txt", "file3.txt"];
25 |     let results = Arc::new(Mutex::new(Vec::new()));
26 |     let mut handles = vec![];
27 | 
28 |     for path in paths {
29 |         let results = Arc::clone(&results);
30 |         let handle = thread::spawn(move || {
31 |             let hash = hash_file(path);
32 |             results.lock().unwrap().push((path.to_string(), hash));
33 |         });
34 |         handles.push(handle);
35 |     }
36 | 
37 |     for handle in handles {
38 |         handle.join().unwrap();
39 |     }
40 | 
41 |     for (file, hash) in results.lock().unwrap().iter() {
42 |         println!("{}: {}", file, hash);
43 |     }
44 | }
45 | hash
46 | 


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