1 files changed, 58 insertions, 0 deletions
diff --git a/caps/PrincipalHashKey.h b/caps/PrincipalHashKey.h
new file mode 100644
index 0000000000..b5167aa11b
--- /dev/null
+++ b/caps/PrincipalHashKey.h
@@ -0,0 +1,58 @@
+/* -*- 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_PrincipalHashKey_h
+#define mozilla_PrincipalHashKey_h
+
+#include "BasePrincipal.h"
+#include "PLDHashTable.h"
+#include "mozilla/Unused.h"
+#include "nsCOMPtr.h"
+#include "nsHashKeys.h"
+
+namespace mozilla {
+
+class PrincipalHashKey : public PLDHashEntryHdr {
+ public:
+  using KeyType = nsIPrincipal*;
+  using KeyTypePointer = const nsIPrincipal*;
+
+  explicit PrincipalHashKey(const nsIPrincipal* aKey)
+      : mPrincipal(const_cast<nsIPrincipal*>(aKey)) {
+    MOZ_ASSERT(aKey);
+    MOZ_COUNT_CTOR(PrincipalHashKey);
+  }
+  PrincipalHashKey(PrincipalHashKey&& aKey) noexcept
+      : mPrincipal(std::move(aKey.mPrincipal)) {
+    MOZ_COUNT_CTOR(PrincipalHashKey);
+  }
+
+  MOZ_COUNTED_DTOR(PrincipalHashKey)
+
+  nsIPrincipal* GetKey() const { return mPrincipal; }
+
+  bool KeyEquals(const nsIPrincipal* aKey) const {
+    return BasePrincipal::Cast(mPrincipal)
+        ->FastEquals(const_cast<nsIPrincipal*>(aKey));
+  }
+
+  static const nsIPrincipal* KeyToPointer(const nsIPrincipal* aKey) {
+    return aKey;
+  }
+  static PLDHashNumber HashKey(const nsIPrincipal* aKey) {
+    const auto* bp = BasePrincipal::Cast(aKey);
+    return HashGeneric(bp->GetOriginNoSuffixHash(), bp->GetOriginSuffixHash());
+  }
+
+  enum { ALLOW_MEMMOVE = true };
+
+ protected:
+  nsCOMPtr<nsIPrincipal> mPrincipal;
+};
+
+}  // namespace mozilla
+
+#endif