Simple text example

input.fg

@@ -0,0 +1,3 @@
+REG rx, 6
+REG ry, 7
+ADD rx, ry, 0

src/main.rs

@@ -2,21 +2,20 @@ mod binary;
 mod emulator;
 mod text;
 
-use std::sync::Arc;
+use std::{fs, sync::Arc};
 
 use osui::prelude::*;
 
-use crate::emulator::{instruction::Instruction, registry::Registry};
+use crate::{
+    emulator::{instruction::Instruction, registry::Registry},
+    text::from_text,
+};
 
 fn main() {
     let screen = Screen::new();
-    let instructions = vec![
+    let s = fs::read_to_string("input.fg").unwrap();
-        Instruction::REG(0, 6),
-        Instruction::REG(1, 7),
-        Instruction::ADD(0, 1, 2), // 6 + 7
-    ];
 
-    app(&screen, instructions).draw(&screen);
+    app(&screen, from_text(&s)).draw(&screen);
 
     screen.run().unwrap();
 }

src/text.rs

@@ -0,0 +1,31 @@
+use crate::emulator::instruction::Instruction;
+
+pub fn reg(r: &str) -> u8 {
+    match r.to_lowercase().as_str() {
+        "rx" => 0,
+        "ry" => 1,
+        "rz" => 2,
+        "ra" => 3,
+        _ => 0,
+    }
+}
+
+pub fn num(r: &str) -> usize {
+    r.parse().unwrap()
+}
+
+pub fn from_text(s: &str) -> Vec<Instruction> {
+    s.lines()
+        .filter_map(|v| {
+            let (name, args) = v.split_once(' ')?;
+            let args: Vec<&str> = args.split(',').map(str::trim).collect();
+
+            match name.to_lowercase().as_str() {
+                "hlt" => Some(Instruction::HLT),
+                "reg" => Some(Instruction::REG(reg(args[0]), num(args[1]))),
+                "add" => Some(Instruction::ADD(reg(args[0]), reg(args[1]), reg(args[2]))),
+                _ => None,
+            }
+        })
+        .collect()
+}