Bug 1876579 - Add a hash key class for OriginAttributes. r=ckerschb

Differential Revision: https://phabricator.services.mozilla.com/D200817

Author: Trikolon

caps/OriginAttributesHashKey.h

@@ -0,0 +1,55 @@
+/* -*- 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_OriginAttributesHashKey_h
+#define mozilla_OriginAttributesHashKey_h
+
+#include "OriginAttributes.h"
+#include "PLDHashTable.h"
+#include "nsHashKeys.h"
+
+namespace mozilla {
+
+class OriginAttributesHashKey : public PLDHashEntryHdr {
+ public:
+  using KeyType = OriginAttributes;
+  using KeyTypeRef = const KeyType&;
+  using KeyTypePointer = const KeyType*;
+
+  explicit OriginAttributesHashKey(KeyTypePointer aKey) {
+    mOriginAttributes = *aKey;
+    MOZ_COUNT_CTOR(OriginAttributesHashKey);
+  }
+  OriginAttributesHashKey(OriginAttributesHashKey&& aKey) noexcept {
+    mOriginAttributes = std::move(aKey.mOriginAttributes);
+    MOZ_COUNT_CTOR(OriginAttributesHashKey);
+  }
+
+  MOZ_COUNTED_DTOR(OriginAttributesHashKey)
+
+  KeyTypeRef GetKey() const { return mOriginAttributes; }
+
+  bool KeyEquals(KeyTypePointer aKey) const {
+    return mOriginAttributes == *aKey;
+  }
+
+  static KeyTypePointer KeyToPointer(KeyTypeRef aKey) { return &aKey; }
+
+  static PLDHashNumber HashKey(KeyTypePointer aKey) {
+    nsAutoCString suffix;
+    aKey->CreateSuffix(suffix);
+    return mozilla::HashString(suffix);
+  }
+
+  enum { ALLOW_MEMMOVE = true };
+
+ protected:
+  OriginAttributes mOriginAttributes;
+};
+
+}  // namespace mozilla
+
+#endif

caps/moz.build

@@ -34,6 +34,7 @@ EXPORTS.mozilla = [
     "ExpandedPrincipal.h",
     "NullPrincipal.h",
     "OriginAttributes.h",
+    "OriginAttributesHashKey.h",
     "PrincipalHashKey.h",
     "SystemPrincipal.h",
 ]