Add a bin loader

src/simulator/loader.rs

@@ -3,6 +3,7 @@ use crate::Machine;
 use std::fs;
 use std::io;
 use std::io::BufRead;
+use std::io::Read;
 
 
 
@@ -15,6 +16,7 @@ use std::io::BufRead;
 	/// 
 	/// - **path** the path of the file to load
 	/// - **size** the number of bytes to write (1, 2, 4 or 8)
+#[deprecated]
 pub fn _load(path : &str, instruction_size: i32) -> Machine {
     let file = fs::File::open(path).expect("Wrong filename");
     let reader = io::BufReader::new(file);
@@ -31,4 +33,33 @@ pub fn _load(path : &str, instruction_size: i32) -> Machine {
     }
     println!("{:x}", Machine::read_memory(& mut machine, 4, 0));
     machine
+}
+
+/// load a 32-bits binary file into the machine
+/// 
+/// ### Parameters
+/// 
+/// - **path** path of the file to load
+/// - **machine** the machine where the bin file will be loaded
+/// - **start_index** at which index of machine memory you want to start to load the program
+/// 
+/// Returns in a Result any io error
+pub fn load(path: &str, machine: &mut Machine, start_index: usize) -> Result<(), std::io::Error> {
+    let mut file = fs::File::open(path)?;
+    let mut instructions: Vec<u32> = Default::default();
+    loop {
+        let mut buf: [u8; 4] = [0; 4];
+        let res = file.read(&mut buf)?;
+        if res == 0 {
+            break; // eof
+        } else {
+            instructions.push(u32::from_le_bytes(buf));
+        }
+    }
+    for i in 0..instructions.len() {
+        machine.write_memory(4, 4 * i + start_index, instructions[i] as u64);
+    }
+    #[cfg(debug_assertions)]
+    println!("{:04x?}", instructions); // only print loaded program in debug build
+    Ok(())
 }