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a53b913e63
This was added in bug 1355661, has been kept Nightly-only since then, and was only used briefly for omni.ja, and eventually we switched compression off entirely on omni.ja. If we ever switch compression on again on omni.ja, it would likely be with zstd, which is much faster on the compression side. Differential Revision: https://phabricator.services.mozilla.com/D118654
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/* nsJARInputStream.h
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*
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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 nsJARINPUTSTREAM_h__
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#define nsJARINPUTSTREAM_h__
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#include "nsIInputStream.h"
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#include "nsJAR.h"
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#include "nsTArray.h"
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#include "mozilla/Attributes.h"
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/*-------------------------------------------------------------------------
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* Class nsJARInputStream declaration. This class defines the type of the
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* object returned by calls to nsJAR::GetInputStream(filename) for the
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* purpose of reading a file item out of a JAR file.
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*------------------------------------------------------------------------*/
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class nsJARInputStream final : public nsIInputStream {
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public:
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nsJARInputStream()
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: mOutSize(0),
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mInCrc(0),
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mOutCrc(0),
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mNameLen(0),
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mCurPos(0),
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mArrPos(0),
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mMode(MODE_NOTINITED) {
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memset(&mZs, 0, sizeof(z_stream));
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}
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIINPUTSTREAM
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// takes ownership of |fd|, even on failure
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nsresult InitFile(nsJAR* aJar, nsZipItem* item);
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nsresult InitDirectory(nsJAR* aJar, const nsACString& aJarDirSpec,
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const char* aDir);
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private:
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~nsJARInputStream() { Close(); }
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RefPtr<nsZipHandle> mFd; // handle for reading
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uint32_t mOutSize; // inflated size
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uint32_t mInCrc; // CRC as provided by the zipentry
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uint32_t mOutCrc; // CRC as calculated by me
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z_stream mZs; // zip data structure
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/* For directory reading */
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RefPtr<nsJAR> mJar; // string reference to zipreader
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uint32_t mNameLen; // length of dirname
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nsCString mBuffer; // storage for generated text of stream
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uint32_t mCurPos; // Current position in buffer
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uint32_t mArrPos; // current position within mArray
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nsTArray<nsCString> mArray; // array of names in (zip) directory
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typedef enum {
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MODE_NOTINITED,
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MODE_CLOSED,
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MODE_DIRECTORY,
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MODE_INFLATE,
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MODE_COPY
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} JISMode;
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JISMode mMode; // Modus of the stream
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nsresult ContinueInflate(char* aBuf, uint32_t aCount, uint32_t* aBytesRead);
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nsresult ReadDirectory(char* aBuf, uint32_t aCount, uint32_t* aBytesRead);
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uint32_t CopyDataToBuffer(char*& aBuffer, uint32_t& aCount);
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};
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#endif /* nsJARINPUTSTREAM_h__ */
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