forked from mirrors/gecko-dev
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsURIHashKey_h__
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#define nsURIHashKey_h__
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#include <utility>
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#include "PLDHashTable.h"
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#include "mozilla/Unused.h"
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#include "nsCOMPtr.h"
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#include "nsHashKeys.h"
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#include "nsIURI.h"
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/**
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* Hashtable key class to use with nsTHashtable/nsBaseHashtable
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*/
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class nsURIHashKey : public PLDHashEntryHdr {
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public:
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typedef nsIURI* KeyType;
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typedef const nsIURI* KeyTypePointer;
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nsURIHashKey() { MOZ_COUNT_CTOR(nsURIHashKey); }
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explicit nsURIHashKey(const nsIURI* aKey) : mKey(const_cast<nsIURI*>(aKey)) {
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MOZ_COUNT_CTOR(nsURIHashKey);
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}
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nsURIHashKey(nsURIHashKey&& toMove)
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: PLDHashEntryHdr(std::move(toMove)), mKey(std::move(toMove.mKey)) {
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MOZ_COUNT_CTOR(nsURIHashKey);
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}
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MOZ_COUNTED_DTOR(nsURIHashKey)
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nsURIHashKey& operator=(const nsURIHashKey& aOther) {
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mKey = aOther.mKey;
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return *this;
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}
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nsIURI* GetKey() const { return mKey; }
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bool KeyEquals(const nsIURI* aKey) const {
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bool eq;
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if (!mKey) {
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return !aKey;
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}
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if (NS_SUCCEEDED(mKey->Equals(const_cast<nsIURI*>(aKey), &eq))) {
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return eq;
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}
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return false;
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}
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static const nsIURI* KeyToPointer(nsIURI* aKey) { return aKey; }
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static PLDHashNumber HashKey(const nsIURI* aKey) {
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if (!aKey) {
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// If the key is null, return hash for empty string.
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return mozilla::HashString(""_ns);
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}
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nsAutoCString spec;
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// If GetSpec() fails, ignoring the failure and proceeding with an
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// empty |spec| seems like the best thing to do.
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mozilla::Unused << const_cast<nsIURI*>(aKey)->GetSpec(spec);
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return mozilla::HashString(spec);
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}
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enum { ALLOW_MEMMOVE = true };
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protected:
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nsCOMPtr<nsIURI> mKey;
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};
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#endif // nsURIHashKey_h__
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