computer: init store

crates/brk_core/src/utils/bytes.rs

@@ -1,5 +1,18 @@
 use crate::{Error, Result};
 
+#[allow(clippy::result_unit_err)]
+pub fn copy_first_4bytes(slice: &[u8]) -> Result<[u8; 4]> {
+    let mut buf: [u8; 4] = [0; 4];
+    let buf_len = buf.len();
+    if slice.len() < buf_len {
+        return Err(Error::String("Buffer is too small to convert to 8 bytes"));
+    }
+    slice.iter().take(buf_len).enumerate().for_each(|(i, r)| {
+        buf[i] = *r;
+    });
+    Ok(buf)
+}
+
 #[allow(clippy::result_unit_err)]
 pub fn copy_first_8bytes(slice: &[u8]) -> Result<[u8; 8]> {
     let mut buf: [u8; 8] = [0; 8];