chore: improved error handling

src/cpu.rs

@@ -280,7 +280,12 @@ impl Cpu {
         }
 
         #[cfg(feature = "cpulog")]
-        println!("[0x{:04x}] {}\t({} cycles)", self.pc - 1, inst_str, inst_time);
+        println!(
+            "[0x{:04x}] {}\t({} cycles)",
+            self.pc - 1,
+            inst_str,
+            inst_time
+        );
 
         #[cfg(feature = "secure")]
         if self.mmu.boot_active() && self.pc - 1 > 0x08ff {

src/util.rs

@@ -3,7 +3,10 @@ use std::{cell::RefCell, fs::File, io::Read, rc::Rc};
 pub type SharedMut<T> = Rc<RefCell<T>>;
 
 pub fn read_file(path: &str) -> Vec<u8> {
-    let mut file = File::open(path).unwrap();
+    let mut file = match File::open(path) {
+        Ok(file) => file,
+        Err(_) => panic!("Failed to open file: {}", path),
+    };
     let mut data = Vec::new();
     file.read_to_end(&mut data).unwrap();
     data