Change label token to accept a 32 bit number instead of reading rgl

README.md

@@ -14,8 +14,8 @@ A virtual machine for controlling a wifi led strip.
 | load (rgp, rgd)     | loads the value the pointer register points to into the data register        | 0x04 |
 | clear \<rg>         | clears a register (sets it to 0x00)                                          | 0x05 |
 | write (rgd, rgp)    | writes the value in the data register to the address of the pointer register | 0x06 |
-| label (rgl)         | creates a label with rgd as the name                                         | 0x07 |
+| label <byte>        | creates a label at the current position.                                     | 0x07 |
-| goto (rgl)          | goes to the label with name rgd                                              | 0x08 |
+| goto (rgl)          | goes to the label with name rgl                                              | 0x08 |
 | debug (*)           | prints out the state for debug information                                   | 0x09 |
 | add (rgd, rgi, rgo) | adds the value of rgi to the value of rgd and writes the result into rgo     | 0x10 |
 | sub (rgd, rgi, rgo) | substracts rgi from rgd and writes the result into rgo                       | 0x11 |
@@ -52,4 +52,13 @@ A virtual machine for controlling a wifi led strip.
 - the rgi register stores the input for operations that require two input values
 - the rgo register stores the result of operations
 - the rgl register stores as label name that can be jumped to
-- comments start with #
+- comments start with #
+
+## The Runtime
+
+The runtime works in three stages.
+
+1. Connect to the led strip
+2. Parse the bytecode into a vector of tokens
+    - if the instruction creates a label, add the label to the map of labels
+3. Execute the token vector

src/bin/lsambler.rs

@@ -68,7 +68,7 @@ fn get_token(line: &str) -> Option<Box<dyn Token>> {
             value: parse_value(instr_parts.next()?).expect(&format!(
                 "Failed to parse the hex value into a u8: {}.",
                 line
-            )),
+            )) as u8,
             register: get_register_code_by_name(instr_parts.next()?)?,
         }),
         "copy" => some_box!(CopyToken {
@@ -80,7 +80,9 @@ fn get_token(line: &str) -> Option<Box<dyn Token>> {
             register: get_register_code_by_name(instr_parts.next()?)?,
         }),
         "write" => some_box!(WriteToken),
-        "label" => some_box!(LabelToken),
+        "label" => some_box!(LabelToken {
+            value: parse_value(instr_parts.next()?).expect("Failed to parse label name")
+        }),
         "goto" => some_box!(GotoToken),
         "debug" => some_box!(DebugToken),
         "add" => some_box!(AddToken),
@@ -102,11 +104,11 @@ fn get_token(line: &str) -> Option<Box<dyn Token>> {
 
 /// Parses a value depending on if it starts with 0x (as a hex value)
 /// or just is a plain base-10 number
-fn parse_value(value: &str) -> Result<u8, ParseIntError> {
+fn parse_value(value: &str) -> Result<u32, ParseIntError> {
     if value.starts_with("0x") {
         let value = value.trim_start_matches("0x");
-        Ok(i64::from_str_radix(value, 16)? as u8)
+        Ok(i64::from_str_radix(value, 16)? as u32)
     } else {
-        value.parse::<u8>()
+        value.parse::<u32>()
     }
 }

src/runtime.rs

@@ -27,7 +27,7 @@ pub struct Runtime {
     pub rgl: Rgl,
     pub memory: HashMap<u32, u32>,
     text: Rc<RefCell<Vec<Box<dyn Token>>>>,
-    labels: HashMap<u32, usize>,
+    pub labels: HashMap<u32, usize>,
     pub strip_controller: Rc<RefCell<LedStripController>>,
     exit: Option<u8>,
     current_index: usize,
@@ -63,6 +63,7 @@ impl Runtime {
     pub fn parse_bytecode(&mut self, bytecode: Vec<u8>) {
         let mut code_iter = bytecode.iter();
         let mut text = self.text.borrow_mut();
+        let mut index = 0;
 
         while let Some(instruction) = code_iter.next() {
             match *instruction {
@@ -86,7 +87,17 @@ impl Runtime {
                     code_iter.next().unwrap(),
                 ]))),
                 T_WRITE => text.push(Box::new(WriteToken)),
-                T_LABEL => text.push(Box::new(LabelToken)),
+                T_LABEL => {
+                    let token = LabelToken::from_bytecode(&[
+                        instruction,
+                        code_iter.next().unwrap(),
+                        code_iter.next().unwrap(),
+                        code_iter.next().unwrap(),
+                        code_iter.next().unwrap(),
+                    ]);
+                    self.labels.insert(token.value, index);
+                    text.push(Box::new(token));
+                }
                 T_GOTO => text.push(Box::new(GotoToken)),
                 T_DEBUG => text.push(Box::new(DebugToken)),
                 T_ADD => text.push(Box::new(AddToken)),
@@ -104,6 +115,7 @@ impl Runtime {
                 T_SEND => text.push(Box::new(SendToken)),
                 _ => panic!("unknown instruction {}", instruction),
             };
+            index += 1;
         }
     }
 

src/tokens.rs

@@ -1,6 +1,7 @@
 use crate::registers::{Register, RCS};
 use crate::runtime::Runtime;
 use std::io;
+use std::mem;
 use std::thread::sleep;
 use std::time::Duration;
 
@@ -242,23 +243,30 @@ impl FromBytecode for WriteToken {
 }
 
 #[derive(Debug, Clone)]
-pub struct LabelToken;
+pub struct LabelToken {
+    pub value: u32,
+}
 
 impl Token for LabelToken {
     fn to_bytecode(&self) -> Vec<u8> {
-        vec![T_LABEL]
+        let mut bytecode = vec![T_LABEL];
+        bytecode.append(&mut self.value.to_be_bytes().to_vec());
+
+        bytecode
     }
 
     fn invoke(&self, runtime: &mut Runtime) -> io::Result<()> {
-        runtime.create_label(runtime.rgl.get());
+        runtime.create_label(self.value);
 
         Ok(())
     }
 }
 
 impl FromBytecode for LabelToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
+    fn from_bytecode(code: &[&u8]) -> Self {
-        Self
+        Self {
+            value: u32::from_be_bytes([*code[1], *code[2], *code[3], *code[4]]),
+        }
     }
 }
 
@@ -295,6 +303,7 @@ impl Token for DebugToken {
         println!("rgo: {}", runtime.rgo.get());
         println!("rgl: {}", runtime.rgl.get());
         println!("\n--- Runtime ---");
+        println!("Labels: {:?}", runtime.labels);
         println!("Memory: {:?}", runtime.memory);
         println!();