1 files changed, 29 insertions, 0 deletions
diff --git a/xpcom/base/ErrorNames.h b/xpcom/base/ErrorNames.h
new file mode 100644
index 0000000000..d209cc492b
--- /dev/null
+++ b/xpcom/base/ErrorNames.h
@@ -0,0 +1,29 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_ErrorNames_h
+#define mozilla_ErrorNames_h
+
+#include "nsError.h"
+#include "nsStringFwd.h"
+
+namespace mozilla {
+
+// Maps the given nsresult to its symbolic name. For example,
+// GetErrorName(NS_OK, name) will result in name == "NS_OK".
+// When the symbolic name is unknown, name will be of the form
+// "NS_ERROR_GENERATE_SUCCESS(<module>, <code>)" or
+// "NS_ERROR_GENERATE_FAILURE(<module>, <code>)".
+void GetErrorName(nsresult rv, nsACString& name);
+
+// Same as GetErrorName, except that only nsresult values with statically
+// known symbolic names are handled. For all other values, nullptr is
+// returned.
+const char* GetStaticErrorName(nsresult rv);
+
+}  // namespace mozilla
+
+#endif  // mozilla_ErrorNames_h