diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /modules/libjar/nsJAR.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | modules/libjar/nsJAR.h | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/modules/libjar/nsJAR.h b/modules/libjar/nsJAR.h new file mode 100644 index 0000000000..01332b8616 --- /dev/null +++ b/modules/libjar/nsJAR.h @@ -0,0 +1,190 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 nsJAR_h_ +#define nsJAR_h_ + +#include "nscore.h" +#include "prio.h" +#include "mozilla/Logging.h" +#include "prinrval.h" + +#include "mozilla/Atomics.h" +#include "mozilla/RecursiveMutex.h" +#include "nsCOMPtr.h" +#include "nsClassHashtable.h" +#include "nsString.h" +#include "nsIFile.h" +#include "nsStringEnumerator.h" +#include "nsHashKeys.h" +#include "nsRefPtrHashtable.h" +#include "nsTHashtable.h" +#include "nsIZipReader.h" +#include "nsZipArchive.h" +#include "nsWeakReference.h" +#include "nsIObserver.h" +#include "mozilla/Attributes.h" + +class nsZipReaderCache; + +/*------------------------------------------------------------------------- + * Class nsJAR declaration. + * nsJAR serves as an XPCOM wrapper for nsZipArchive with the addition of + * JAR manifest file parsing. + *------------------------------------------------------------------------*/ +class nsJAR final : public nsIZipReader { + // Allows nsJARInputStream to call the verification functions + friend class nsJARInputStream; + // Allows nsZipReaderCache to access mOuterZipEntry + friend class nsZipReaderCache; + + private: + virtual ~nsJAR(); + + public: + nsJAR(); + + NS_DEFINE_STATIC_CID_ACCESSOR(NS_ZIPREADER_CID) + + NS_DECL_THREADSAFE_ISUPPORTS + + NS_DECL_NSIZIPREADER + + nsresult GetFullJarPath(nsACString& aResult); + + // These access to mReleaseTime, which is locked by nsZipReaderCache's + // mLock, not nsJAR's mLock + PRIntervalTime GetReleaseTime() { return mReleaseTime; } + + bool IsReleased() { return mReleaseTime != PR_INTERVAL_NO_TIMEOUT; } + + void SetReleaseTime() { mReleaseTime = PR_IntervalNow(); } + + void ClearReleaseTime() { mReleaseTime = PR_INTERVAL_NO_TIMEOUT; } + + void SetZipReaderCache(nsZipReaderCache* aCache) { + mozilla::RecursiveMutexAutoLock lock(mLock); + mCache = aCache; + } + + nsresult GetNSPRFileDesc(PRFileDesc** aNSPRFileDesc); + + protected: + nsresult LoadEntry(const nsACString& aFilename, nsCString& aBuf); + int32_t ReadLine(const char** src); + + // used by nsZipReaderCache for flushing entries; access is locked by + // nsZipReaderCache's mLock + PRIntervalTime mReleaseTime; + + //-- Private data members, protected by mLock + mozilla::RecursiveMutex mLock; + // The entry in the zip this zip is reading from + nsCString mOuterZipEntry MOZ_GUARDED_BY(mLock); + // The zip/jar file on disk + nsCOMPtr<nsIFile> mZipFile MOZ_GUARDED_BY(mLock); + // The underlying zip archive + RefPtr<nsZipArchive> mZip MOZ_GUARDED_BY(mLock); + // if cached, this points to the cache it's contained in + nsZipReaderCache* mCache MOZ_GUARDED_BY(mLock); +}; + +/** + * nsJARItem + * + * An individual JAR entry. A set of nsJARItems matching a + * supplied pattern are returned in a nsJAREnumerator. + */ +class nsJARItem : public nsIZipEntry { + public: + NS_DECL_THREADSAFE_ISUPPORTS + NS_DECL_NSIZIPENTRY + + explicit nsJARItem(nsZipItem* aZipItem); + + private: + virtual ~nsJARItem() {} + + const uint32_t mSize; /* size in original file */ + const uint32_t mRealsize; /* inflated size */ + const uint32_t mCrc32; + const PRTime mLastModTime; + const uint16_t mCompression; + const uint32_t mPermissions; + const bool mIsDirectory; + const bool mIsSynthetic; +}; + +/** + * nsJAREnumerator + * + * Enumerates a list of files in a zip archive + * (based on a pattern match in its member nsZipFind). + */ +class nsJAREnumerator final : public nsStringEnumeratorBase { + public: + NS_DECL_THREADSAFE_ISUPPORTS + NS_DECL_NSIUTF8STRINGENUMERATOR + + using nsStringEnumeratorBase::GetNext; + + explicit nsJAREnumerator(nsZipFind* aFind) + : mFind(aFind), mName(nullptr), mNameLen(0) { + NS_ASSERTION(mFind, "nsJAREnumerator: Missing zipFind."); + } + + private: + nsZipFind* mFind; + const char* mName; // pointer to an name owned by mArchive -- DON'T delete + uint16_t mNameLen; + + ~nsJAREnumerator() { delete mFind; } +}; + +//////////////////////////////////////////////////////////////////////////////// + +#if defined(DEBUG_warren) || defined(DEBUG_jband) +# define ZIP_CACHE_HIT_RATE +#endif + +class nsZipReaderCache : public nsIZipReaderCache, + public nsIObserver, + public nsSupportsWeakReference { + friend class nsJAR; + + public: + NS_DECL_THREADSAFE_ISUPPORTS + NS_DECL_NSIZIPREADERCACHE + NS_DECL_NSIOBSERVER + + nsZipReaderCache(); + + nsresult ReleaseZip(nsJAR* reader); + + typedef nsRefPtrHashtable<nsCStringHashKey, nsJAR> ZipsHashtable; + + protected: + void AssertLockOwned() { mLock.AssertCurrentThreadOwns(); } + + virtual ~nsZipReaderCache(); + + mozilla::Mutex mLock; + uint32_t mCacheSize MOZ_GUARDED_BY(mLock); + ZipsHashtable mZips MOZ_GUARDED_BY(mLock); + +#ifdef ZIP_CACHE_HIT_RATE + uint32_t mZipCacheLookups MOZ_GUARDED_BY(mLock); + uint32_t mZipCacheHits MOZ_GUARDED_BY(mLock); + uint32_t mZipCacheFlushes MOZ_GUARDED_BY(mLock); + uint32_t mZipSyncMisses MOZ_GUARDED_BY(mLock); +#endif + + private: + nsresult GetZip(nsIFile* zipFile, nsIZipReader** result, bool failOnMiss); +}; + +//////////////////////////////////////////////////////////////////////////////// + +#endif /* nsJAR_h_ */ |