Add sample

.gitignore

@@ -1 +1,3 @@
 /target
+*.wasm
+*.mrb

Cargo.toml

@@ -3,5 +3,5 @@ resolver = "2"
 
 members = [
     "mruby-objdump",
-    "mrubyedge",
+    "mrubyedge", "wasmsample",
 ]

wasmsample/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "wasmsample"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies.mrubyedge]
+path = "../mrubyedge"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"

wasmsample/src/lib.rs

@@ -0,0 +1,31 @@
+extern crate mrubyedge;
+
+use mrubyedge::{mrb_helper, vm::RObject};
+
+const DATA: &'static [u8] = include_bytes!("./hello.mrb");
+const FNNAME: &'static str = "hello_mruby_from_wasm";
+
+#[no_mangle]
+pub fn hello_mruby_from_wasm() {
+    let rite = mrubyedge::rite::load(DATA).unwrap();
+    let mut vm = mrubyedge::vm::VM::open(rite);
+    vm.prelude().unwrap();
+    vm.eval_insn().unwrap();
+
+    let objclass_sym = vm.target_class.unwrap() as usize;
+    let top_self = RObject::RInstance {
+        class_index: objclass_sym,
+    };
+    let args = vec![];
+
+    match mrb_helper::mrb_funcall(&mut vm, &top_self, FNNAME.to_string(), &args) {
+        Ok(retval) => {
+            eprintln!("{:?}", retval);
+        }
+        Err(ex) => {
+            dbg!(ex);
+        }
+    };
+
+    ()
+}