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JacobMillward · Feb 28, 2023 · 2a0f683 · 2a0f683
1 parent fbdebe0
commit 2a0f683
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Showing 3 changed files with 21 additions and 20 deletions.
diff --git a/src/chip8/cpu.rs b/src/chip8/cpu.rs
@@ -143,7 +143,9 @@ impl CPU {
             // CALL addr
             (2, _, _, _) => {
                 self.registers.inc_pc();
-                self.return_stack.push(self.registers.pc).expect("Unable to push value to stack");
+                self.return_stack
+                    .push(self.registers.pc)
+                    .expect("Unable to push value to stack");
                 self.registers.pc = nnn;
             }
             // SE Vx, byte

diff --git a/src/chip8/return_stack.rs b/src/chip8/return_stack.rs
@@ -1,11 +1,9 @@
 #[derive(Debug, PartialEq)]
 pub(super) enum StackError {
     Overflow,
-    Underflow
+    Underflow,
 }
 
-
-
 pub(super) struct ReturnStack {
     stack: [u16; 16],
     sp: u8,
@@ -32,7 +30,6 @@ impl ReturnStack {
     pub fn pop(&mut self) -> Result<u16, StackError> {
         if self.sp == 0 {
             return Err(StackError::Underflow);
-
         }
 
         self.sp -= 1;
@@ -63,10 +60,13 @@ mod tests {
         let result = stack.push(1);
         assert!(result.is_err());
 
-        assert_eq!( match result {
-            Ok(_) => unreachable!(),
-            Err(err) => err
-        }, StackError::Overflow);
+        assert_eq!(
+            match result {
+                Ok(_) => unreachable!(),
+                Err(err) => err,
+            },
+            StackError::Overflow
+        );
     }
 
     #[test]
@@ -76,9 +76,12 @@ mod tests {
         let result = stack.pop();
         assert!(result.is_err());
 
-        assert_eq!( match result {
-            Ok(_) => unreachable!(),
-            Err(err) => err
-        }, StackError::Underflow);
+        assert_eq!(
+            match result {
+                Ok(_) => unreachable!(),
+                Err(err) => err,
+            },
+            StackError::Underflow
+        );
     }
-}
+}
diff --git a/src/main.rs b/src/main.rs
@@ -1,10 +1,7 @@
 extern crate minifb;
 
-use std::{
-    fs::File,
-    io::Read
-};
 use clap::Parser;
+use std::{fs::File, io::Read};
 
 mod chip8;
 mod window;
@@ -24,7 +21,6 @@ fn main() {
     let mut file = File::open(args.input_rom).unwrap();
     let mut data = Vec::<u8>::new();
     file.read_to_end(&mut data).expect("File not found!");
-   
+
     run_chip8_program(&data);
 }
-