[oden] Native IO module

src/io.ts

@@ -0,0 +1,11 @@
+import * as core from "io-core";
+
+/**
+ * Load the specified file into memory.
+ *
+ * @param path The path of the file to load.
+ * @returns The contents of the file.
+ */
+export function load(path: string): Promise<ArrayBuffer> {
+  return core.load(path);
+}

src/script/io.rs

@@ -71,7 +71,12 @@ impl IoImpl {
         self.thread_pool.execute(Box::new(move || {
             // TODO: Actually read the path.
             let path = path;
-            promise.resolve(move |ctx: &ContextRef| ctx.new_string(&path));
+
+            let result = std::fs::read(path);
+            promise.resolve(move |ctx: &ContextRef| match result {
+                Ok(v) => ctx.new_array_buffer(v),
+                Err(err) => Err(err.into()),
+            });
         }));
 
         Ok(value)

types/io-core.d.ts

@@ -0,0 +1,3 @@
+// These are the functions exposed by the native IO module.
+//
+export function load(path: string): Promise<ArrayBuffer>;