forked from mirrors/gecko-dev
86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
//* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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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 nsUrlClassifierPrefixSet_h_
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#define nsUrlClassifierPrefixSet_h_
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#include "nsISupportsUtils.h"
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#include "nsID.h"
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#include "nsIUrlClassifierPrefixSet.h"
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#include "nsTArray.h"
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#include "nsToolkitCompsCID.h"
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#include "mozilla/FileUtils.h"
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#include "mozilla/Mutex.h"
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#include "mozilla/Poison.h"
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class nsIInputStream;
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class nsIOutputStream;
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namespace mozilla {
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namespace safebrowsing {
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class VariableLengthPrefixSet;
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} // namespace safebrowsing
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} // namespace mozilla
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class nsUrlClassifierPrefixSet final : public nsIUrlClassifierPrefixSet {
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public:
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nsUrlClassifierPrefixSet();
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NS_IMETHOD Init(const nsACString& aName) override;
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NS_IMETHOD SetPrefixes(const uint32_t* aArray, uint32_t aLength) override;
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NS_IMETHOD GetPrefixes(uint32_t* aCount, uint32_t** aPrefixes) override;
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NS_IMETHOD Contains(uint32_t aPrefix, bool* aFound) override;
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NS_IMETHOD IsEmpty(bool* aEmpty) override;
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nsresult GetPrefixesNative(FallibleTArray<uint32_t>& outArray);
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nsresult WritePrefixes(nsCOMPtr<nsIOutputStream>& out) const;
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nsresult LoadPrefixes(nsCOMPtr<nsIInputStream>& in);
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uint32_t CalculatePreallocateSize() const;
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
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NS_DECL_THREADSAFE_ISUPPORTS
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friend class mozilla::safebrowsing::VariableLengthPrefixSet;
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private:
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virtual ~nsUrlClassifierPrefixSet();
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static const uint32_t DELTAS_LIMIT = 120;
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static const uint32_t MAX_INDEX_DIFF = (1 << 16);
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static const uint32_t PREFIXSET_VERSION_MAGIC = 1;
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void Clear();
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nsresult MakePrefixSet(const uint32_t* aArray, uint32_t aLength);
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uint32_t BinSearch(uint32_t start, uint32_t end, uint32_t target) const;
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bool IsEmptyInternal() const;
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// Lock to prevent races between the url-classifier thread (which does most
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// of the operations) and the main thread (which does memory reporting).
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// It should be held for all operations between Init() and destruction that
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// touch this class's data members.
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mutable mozilla::Mutex mLock;
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// list of fully stored prefixes, that also form the
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// start of a run of deltas in mIndexDeltas.
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nsTArray<uint32_t> mIndexPrefixes;
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// array containing arrays of deltas from indices.
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// Index to the place that matches the closest lower
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// prefix from mIndexPrefix. Then every "delta" corresponds
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// to a prefix in the PrefixSet.
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// This array could be empty when we decide to store all the prefixes
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// in mIndexPrefixes.
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nsTArray<nsTArray<uint16_t> > mIndexDeltas;
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// how many prefixes we have.
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uint32_t mTotalPrefixes;
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nsCString mName; // Set in Init() only
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mozilla::CorruptionCanary mCanary;
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};
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#endif
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