add logger

assembly/logger.ts

@@ -0,0 +1,13 @@
+export declare function write(b: i32): void;
+export declare function flush(): void;
+
+export function log(message: string): void {
+    let messageStr = message + "\n";
+    let strLen: i32 = messageStr.length;
+
+    for (let i = 0; i < strLen; i++) {
+        let b: u8 = messageStr.charCodeAt(i) as u8;
+        write(b);
+    }
+    flush();
+}