feat: works

javascript-container/src/main.rs

@@ -15,8 +15,8 @@ fn main() -> Result<()> {
 
     let memory = instance.get_memory(&mut store, "memory").expect("SHOULD NOT HAPPEN");
     let malloc = instance.get_typed_func::<i32, i32>(&mut store, "malloc")?;
-    let free = instance.get_typed_func::<(i32, i32), ()>(&mut store, "free")?;
-    let eval = instance.get_typed_func::<(i32, i32), (i32, i32)>(&mut store, "eval")?;
+    let free = instance.get_typed_func::<i32, ()>(&mut store, "free")?;
+    let eval = instance.get_typed_func::<i32, i32>(&mut store, "eval")?;
 
     let js = "1+2";
     let js_bytes = js.as_bytes();
@@ -24,10 +24,26 @@ fn main() -> Result<()> {
     let ptr = malloc.call(&mut store, js.as_bytes().len() as i32)?;
     let memory_data_mut = memory.data_mut(&mut store);
     for i in 0..js_bytes_len {
-        memory_data_mut[ptr as usize + i] = js_bytes[i];
+        memory_data_mut[4 + ptr as usize + i] = js_bytes[i];
     }
-    let eval_result = eval.call(&mut store, (ptr, js_bytes_len as i32))?;
+    let eval_result = eval.call(&mut store, ptr)?;
     println!("Eval result: {:?}", eval_result);
 
+    let memory = instance.get_memory(&mut store, "memory").expect("SHOULD NOT HAPPEN");
+    let memory_data_mut = memory.data_mut(&mut store);
+    let mut a = [0_u8; 4];
+    a[0] = memory_data_mut[eval_result as usize + 0];
+    a[1] = memory_data_mut[eval_result as usize + 1];
+    a[2] = memory_data_mut[eval_result as usize + 2];
+    a[3] = memory_data_mut[eval_result as usize + 3];
+    let aa = u32::from_be_bytes(a);
+    println!("Len: {}", aa);
+    let mut s = Vec::with_capacity(aa as usize);
+    for i in 0..aa {
+        s.push(memory_data_mut[eval_result as usize + 4 + i as usize]);
+    }
+    let ss = unsafe { String::from_utf8_unchecked(s) };
+    println!("Result: {}", ss);
+
     Ok(())
 }