feat: add some shit

nodes/multiply/src/lib.rs

@@ -1,9 +1,20 @@
+use std::ffi::CString;
+use std::os::raw::c_char;
+
 #[no_mangle]
 pub extern "C" fn execute(a: u32, b: u32) -> u32 {
     a + b
 }
 
+const DEFINITION: &str = include_str!("./node.json");
+
 #[no_mangle]
-pub extern "C" fn get_definition() -> String {
-    include_str!("./node.json").to_string()
+pub fn get_definition() -> *mut c_char {
+    let s = CString::new(DEFINITION).unwrap();
+    s.into_raw()
+}
+
+#[no_mangle]
+pub fn get_definition_len() -> usize {
+    DEFINITION.len()
 }