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|
use log::{Level, error, info};
use wasm_bindgen::prelude::*;
use web_sys::js_sys;
pub mod forth;
pub mod robo;
enum Error {
NoVM,
}
impl From<Error> for String {
fn from(err: Error) -> Self {
match err {
Error::NoVM => "no vm".to_string().into(),
}
}
}
impl From<forth::vm::RuntimeError> for String {
fn from(err: forth::vm::RuntimeError) -> Self {
format!("runtime error: {}", err)
}
}
fn tr_op(op: &forth::vm::OpCode) -> String {
use forth::vm::OpCode::*;
let s = match op {
If(t, None) => format!("If({t}, none)"),
If(t, Some(f)) => format!("If({t}, {f})"),
TIf(t, None) => format!("TIf({t}, none)"),
TIf(t, Some(f)) => format!("TIf({t}, {f})"),
other => format!("{other:?}"),
};
s.to_string()
}
fn map_set<T: Into::<JsValue>>(m: &js_sys::Map, k: &str, v: T) {
let jk: js_sys::JsString = k.to_string().into();
let jv = v.into();
m.set(&jk, &jv);
}
impl From<&forth::vm::InstructionPointer> for js_sys::Map {
fn from(ip: &forth::vm::InstructionPointer) -> Self {
let res = Self::new();
let w: js_sys::JsString = "word".to_string().into();
let wv = (ip.word as i32).into();
res.set(&w, &wv);
let o: js_sys::JsString = "offset".to_string().into();
let ov = (ip.offset as i32).into();
res.set(&o, &ov);
res
}
}
impl From<&forth::compiler::Annotation> for js_sys::Map {
fn from(anno: &forth::compiler::Annotation) -> Self {
let res = Self::new();
let w: js_sys::JsString = "start".to_string().into();
let wv = (anno.loc.0 as i32).into();
res.set(&w, &wv);
let o: js_sys::JsString = "end".to_string().into();
let ov = (anno.loc.1 as i32).into();
res.set(&o, &ov);
res
}
}
#[wasm_bindgen]
pub struct ExportedVM {
vm: Option<forth::vm::VM>,
annos: Vec<Vec<forth::compiler::Annotation>>,
}
#[wasm_bindgen]
impl ExportedVM {
fn new() -> Self {
Self {
vm: None,
annos: vec![],
}
}
pub fn compile(&mut self, text: &str) -> bool {
let mut comp = forth::compiler::Compiler::new(text);
if let Err(e) = comp.compile() {
error!("couldn't compile program text: {e:?}");
return false;
}
let vm = forth::vm::VM::new(comp.wordlist);
let _ = self.vm.insert(vm);
self.annos = comp.annotations;
true
}
pub fn tick(&mut self) -> Result<bool, String> {
let vm = (&mut self.vm).as_mut().ok_or(Error::NoVM)?;
Ok(vm.tick()?)
}
pub fn run(&mut self) -> Result<usize, String> {
self.reset_ip();
let vm = (&mut self.vm).as_mut().ok_or(Error::NoVM)?;
Ok(vm.run()?)
}
pub fn reset_ip(&mut self) {
let Some(vm) = &mut self.vm else {
return;
};
vm.ip.word = 0;
vm.ip.offset = 0;
}
pub fn trans(&mut self) -> Result<js_sys::Object, String> {
let vm = (&mut self.vm).as_mut().ok_or(Error::NoVM)?;
let res = js_sys::Map::new();
// wordlist
let wl = vm.wordlist.iter().map(
|dfn| {
let ops =
dfn.iter()
.map(|op| {
Into::<js_sys::JsString>::into(tr_op(op))
});
js_sys::Array::from_iter(ops)
}
);
map_set(&res, "wordlist", js_sys::Array::from_iter(wl));
// annotations
let annos = self.annos.iter().map(
|dfn| {
let ops =
dfn.iter()
.map(|anno| {
let a: js_sys::Map = anno.into();
let o: js_sys::Object = js_sys::Object::from_entries(&a).expect("can't make object from anno map");
o
});
js_sys::Array::from_iter(ops)
}
);
map_set(&res, "annos", js_sys::Array::from_iter(annos));
// instruction pointer
let ip: js_sys::Map = (&vm.ip).into();
let o: js_sys::Object = js_sys::Object::from_entries(&ip).expect("can't make object from ip map");
map_set(&res, "ip", o);
// stack
let s = vm.stack.0.iter().map(|v| Into::<JsValue>::into(*v as i32));
map_set(&res, "stack", js_sys::Array::from_iter(s));
// callstack
let cs = vm.callstack.0.iter().map(|v| {
let ip: js_sys::Map = v.into();
let o: js_sys::Object = js_sys::Object::from_entries(&ip).expect("can't make object from ip map");
o
});
map_set(&res, "callstack", js_sys::Array::from_iter(cs));
let vars = js_sys::Map::new();
let mut out = vec![];
std::mem::swap(&mut out, &mut vm.out);
map_set(&vars, "out", out);
map_set::<isize>(&vars, "heading", vm.heading.into());
map_set::<isize>(&vars, "speed", vm.speed.into());
map_set::<isize>(&vars, "doppler", vm.doppler.into());
map_set(&res, "vars", js_sys::Object::from_entries(&vars).expect("can't make object from vars map"));
Ok(js_sys::Object::from_entries(&res).expect("can't make object from results map"))
}
}
#[wasm_bindgen]
pub fn make_vm() -> ExportedVM {
ExportedVM::new()
}
#[wasm_bindgen(start)]
pub fn init() -> Result<(), JsValue> {
console_log::init_with_level(Level::Debug).expect("couldn't init console log");
info!("wasm init");
Ok(())
}
|
