1 files changed, 66 insertions, 0 deletions
diff --git a/toolkit/xre/PolicyChecks.h b/toolkit/xre/PolicyChecks.h
new file mode 100644
index 0000000000..a876ff917d
--- /dev/null
+++ b/toolkit/xre/PolicyChecks.h
@@ -0,0 +1,66 @@
+/* -*- 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 https://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_PolicyChecks_h
+#define mozilla_PolicyChecks_h
+
+#if defined(XP_WIN)
+
+#  include <windows.h>
+#  include "mozilla/Maybe.h"
+
+#  define POLICY_REGKEY_NAME L"SOFTWARE\\Policies\\Mozilla\\" MOZ_APP_BASENAME
+
+// NB: This code must be able to run apart from XPCOM
+
+namespace mozilla {
+
+// Returns Some(true) if the registry value is 1
+// Returns Some(false) if the registry value is not 1
+// Returns Nothing() if the registry value is not present
+inline Maybe<bool> PolicyHasRegValueOfOne(HKEY aKey, LPCWSTR aName) {
+  {
+    DWORD len = sizeof(DWORD);
+    DWORD value;
+    LONG ret = ::RegGetValueW(aKey, POLICY_REGKEY_NAME, aName, RRF_RT_DWORD,
+                              nullptr, &value, &len);
+    if (ret == ERROR_SUCCESS) {
+      return Some(value == 1);
+    }
+  }
+  {
+    ULONGLONG value;
+    DWORD len = sizeof(ULONGLONG);
+    LONG ret = ::RegGetValueW(aKey, POLICY_REGKEY_NAME, aName, RRF_RT_QWORD,
+                              nullptr, &value, &len);
+    if (ret == ERROR_SUCCESS) {
+      return Some(value == 1);
+    }
+  }
+  return Nothing();
+}
+
+inline bool PolicyCheckBoolean(LPCWSTR aPolicyName) {
+  Maybe<bool> localMachineResult =
+      PolicyHasRegValueOfOne(HKEY_LOCAL_MACHINE, aPolicyName);
+  if (localMachineResult.isSome()) {
+    return localMachineResult.value();
+  }
+
+  Maybe<bool> currentUserResult =
+      PolicyHasRegValueOfOne(HKEY_CURRENT_USER, aPolicyName);
+  if (currentUserResult.isSome()) {
+    return currentUserResult.value();
+  }
+
+  return false;
+}
+
+}  // namespace mozilla
+
+#endif  // defined(XP_WIN)
+
+#endif  // mozilla_PolicyChecks_h