♻️ use &[T]::split_at_checked

`&[T]::split_at_checked` was stabilized on rust 1.80

lib/src/archive/read/slice.rs

@@ -6,8 +6,9 @@ use std::borrow::Cow;
 use std::io;
 
 fn read_header_from_slice(bytes: &[u8]) -> io::Result<&[u8]> {
-    // TODO: use split_at_checked instead
-    let (header, body) = bytes.split_at(PNA_HEADER.len());
+    let (header, body) = bytes
+        .split_at_checked(PNA_HEADER.len())
+        .ok_or(io::ErrorKind::UnexpectedEof)?;
     if header != PNA_HEADER {
         return Err(io::Error::new(io::ErrorKind::InvalidData, "It's not PNA"));
     }

lib/src/chunk/read.rs

@@ -134,8 +134,9 @@ pub(crate) fn read_chunk_from_slice(bytes: &[u8]) -> io::Result<(RawChunk<&[u8]>
     crc_hasher.update(&ty[..]);
 
     // read chunk data
-    // TODO: use split_at_checked instead
-    let (data, r) = r.split_at(length as usize);
+    let (data, r) = r
+        .split_at_checked(length as usize)
+        .ok_or(io::ErrorKind::UnexpectedEof)?;
     crc_hasher.update(data);
 
     // read crc sum

lib/src/entry/attr.rs

@@ -54,8 +54,9 @@ impl ExtendedAttribute {
             .split_first_chunk::<{ mem::size_of::<u32>() }>()
             .ok_or(io::ErrorKind::UnexpectedEof)?;
         let len = u32::from_be_bytes(*len) as usize;
-        // TODO: use split_at_checked instead
-        let (name, value) = value.split_at(len);
+        let (name, value) = value
+            .split_at_checked(len)
+            .ok_or(io::ErrorKind::UnexpectedEof)?;
         let name = String::from_utf8(name.to_vec()).map_err(|_| io::ErrorKind::InvalidData)?;
 
         let (len, value) = value