Add a globally usable WindowsErrorString function

Is comphelper the right place for this? Is having it as "inline" the right
way?

Change-Id: I973dbde108f89b6cab17e5d88db2390d6f18a672

1 files changed, 46 insertions, 0 deletions

diff --git a/include/comphelper/windowserrorstring.hxx b/include/comphelper/windowserrorstring.hxx
new file mode 100644
index 000000000000..1da7e9c90630
--- /dev/null
+++ b/include/comphelper/windowserrorstring.hxx
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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 INCLUDED_COMPHELPER_WINDOWSERRORSTRING_HXX
+#define INCLUDED_COMPHELPER_WINDOWSERRORSTRING_HXX
+
+#include <prewin.h>
+#include <postwin.h>
+#include <rtl/ustring.hxx>
+
+namespace {
+
+inline OUString WindowsErrorString(DWORD nErrorCode)
+{
+    LPWSTR pMsgBuf;
+
+    if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+                       NULL,
+                       nErrorCode,
+                       MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                       (LPWSTR)&pMsgBuf,
+                       0,
+                       NULL) == 0)
+        return OUString::number(nErrorCode, 16);
+
+    if (pMsgBuf[wcslen(pMsgBuf)-1] == '\n')
+        pMsgBuf[wcslen(pMsgBuf)-1] = '\0';
+
+    OUString result(pMsgBuf);
+
+    LocalFree(pMsgBuf);
+
+    return result;
+}
+
+} // anonymous namespace
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */