add into_std

crates/main/src/mounted_binary.rs

@@ -48,4 +48,16 @@ impl Result {
             stderr: Vec::new(),
         }
     }
+
+    /// This function checks ret_code and returns either Ok if it was SUCCESS_CODE or Err otherwise.
+    ///
+    /// SAFETY:
+    /// The function relies on both stdout and stderr to contain valid UTF8 string.
+    unsafe fn into_std(self) -> std::result::Result<String, String> {
+        if self.ret_code == SUCCESS_CODE {
+            Ok(String::from_utf8_unchecked(self.stdout))
+        } else {
+            Err(String::from_utf8_unchecked(self.stderr))
+        }
+    }
 }