refactoring example

src/ffi/mod.rs

@@ -1,31 +1,26 @@
-extern crate libc;
+#![no_std]
+
 use libc::{uint8_t, size_t};
+use core::slice;
 
-// Representing the C enum in Rust
 #[repr(C)]
 #[derive(Debug, PartialEq)]
 pub enum ParseStatus {
     ParseOk = 0,
     ParseError = 1,
 }
 
-extern "C" {
-    pub fn parse_mbus(data: *const uint8_t, length: size_t) -> ParseStatus;
-}
-
-
 #[no_mangle]
 pub extern "C" fn parse_mbus(data: *const uint8_t, length: size_t) -> ParseStatus {
-
     if data.is_null() || length == 0 {
         return ParseStatus::ParseError;
     }
 
     let slice = unsafe {
-        std::slice::from_raw_parts(data, length as usize)
+        slice::from_raw_parts(data, length as usize)
     };
 
-    /* dummy code */
+    // Implement your parsing logic here
     if slice.len() == 5 {
         ParseStatus::ParseOk
     } else {