feat: progress bar.

src/meta/file.rs

@@ -33,6 +33,14 @@ pub struct FileMeta {
 
 impl FileMeta {
     pub fn from_path(path: &Path) -> Result<Self> {
+        Self::from_path_with_callback(path, |_| {}, || {})
+    }
+
+    pub fn from_path_with_callback<F1, F2>(path: &Path, mut on_bytes_read: F1, mut on_iop: F2) -> Result<Self>
+    where
+        F1: FnMut(u64),
+        F2: FnMut(),
+    {
         let info =
             fs::metadata(path).with_context(|| format!("无法读取文件信息: {}", path.display()))?;
         if !info.is_file() {
@@ -78,6 +86,9 @@ impl FileMeta {
 
             head115.feed(chunk);
             head_baidu.feed(chunk);
+
+            on_bytes_read(read_len as u64);
+            on_iop(); // 每次 read 调用算一次 IOPS
         }
 
         let head_115 = calc_head_115(head115.as_slice());
@@ -114,6 +125,14 @@ impl FileMeta {
 }
 
 pub fn calc_xxh128(path: &Path) -> Result<String> {
+    calc_xxh128_with_callback(path, |_| {}, || {})
+}
+
+pub fn calc_xxh128_with_callback<F1, F2>(path: &Path, mut on_bytes_read: F1, mut on_iop: F2) -> Result<String>
+where
+    F1: FnMut(u64),
+    F2: FnMut(),
+{
     let mut file = File::open(path).with_context(|| format!("无法打开文件: {}", path.display()))?;
     let mut buffer = vec![0u8; DEFAULT_BUFFER_SIZE];
     let mut hasher = Xxh3::new();
@@ -124,6 +143,8 @@ pub fn calc_xxh128(path: &Path) -> Result<String> {
             break;
         }
         hasher.update(&buffer[..read_len]);
+        on_bytes_read(read_len as u64);
+        on_iop(); // 每次 read 调用算一次 IOPS
     }
 
     Ok(hex_upper(hasher.digest128().to_be_bytes()))