1 files changed, 62 insertions, 0 deletions
diff --git a/src/inode2filename/inode_result.cc b/src/inode2filename/inode_result.cc
new file mode 100644
index 0000000..139b038
--- /dev/null
+++ b/src/inode2filename/inode_result.cc
@@ -0,0 +1,62 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "inode2filename/inode_result.h"
+
+#include <string.h>
+
+namespace iorap::inode2filename {
+
+std::optional<std::string_view> InodeResult::ErrorMessage() const {
+  if (data) {
+    return std::nullopt;
+  }
+
+  const int err_no = data.error();
+  return std::string_view{
+    [=]() -> const char * {
+      switch (err_no) {
+        case InodeResult::kCouldNotFindFilename:
+          return "Could not find filename";
+        case InodeResult::kVerificationFailed:
+          return "Verification failed";
+        default:
+          return strerror(err_no);
+      }
+    }()
+  };
+}
+
+std::ostream& operator<<(std::ostream& os, const InodeResult& result) {
+  os << "InodeResult{";
+  if (result) {
+      os << "OK,";
+  } else {
+      os << "ERR,";
+  }
+
+  os << result.inode << ",";
+
+  if (result) {
+    os << "\"" << result.data.value() << "\"";
+  } else {
+    os << result.data.error();
+    os << " (" << *result.ErrorMessage() << ")";
+  }
+
+  os << "}";
+  return os;
+}
+
+}  // namespace iorap::inode2filename
+\ No newline at end of file