caps/PrincipalHashKey.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_PrincipalHashKey_h
   8 #define mozilla_PrincipalHashKey_h
   9
  10 #include "BasePrincipal.h"
  11 #include "PLDHashTable.h"
  12 #include "mozilla/Unused.h"
  13 #include "nsCOMPtr.h"
  14 #include "nsHashKeys.h"
  15
  16 namespace mozilla {
  17
  18 class PrincipalHashKey : public PLDHashEntryHdr {
  19  public:
  20   using KeyType = nsIPrincipal*;
  21   using KeyTypePointer = const nsIPrincipal*;
  22
  23   explicit PrincipalHashKey(const nsIPrincipal* aKey)
  24       : mPrincipal(const_cast<nsIPrincipal*>(aKey)) {
  25     MOZ_ASSERT(aKey);
  26     MOZ_COUNT_CTOR(PrincipalHashKey);
  27   }
  28   PrincipalHashKey(PrincipalHashKey&& aKey) noexcept
  29       : mPrincipal(std::move(aKey.mPrincipal)) {
  30     MOZ_COUNT_CTOR(PrincipalHashKey);
  31   }
  32
  33   MOZ_COUNTED_DTOR(PrincipalHashKey)
  34
  35   nsIPrincipal* GetKey() const { return mPrincipal; }
  36
  37   bool KeyEquals(const nsIPrincipal* aKey) const {
  38     return BasePrincipal::Cast(mPrincipal)
  39         ->FastEquals(const_cast<nsIPrincipal*>(aKey));
  40   }
  41
  42   static const nsIPrincipal* KeyToPointer(const nsIPrincipal* aKey) {
  43     return aKey;
  44   }
  45   static PLDHashNumber HashKey(const nsIPrincipal* aKey) {
  46     const auto* bp = BasePrincipal::Cast(aKey);
  47     return HashGeneric(bp->GetOriginNoSuffixHash(), bp->GetOriginSuffixHash());
  48   }
  49
  50   enum { ALLOW_MEMMOVE = true };
  51
  52  protected:
  53   nsCOMPtr<nsIPrincipal> mPrincipal;
  54 };
  55
  56 }  // namespace mozilla
  57
  58 #endif