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74 lines
2.6 KiB
C++
74 lines
2.6 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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{
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public:
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nsJARInputStream() :
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mOutSize(0), mInCrc(0), mOutCrc(0), mNameLen(0),
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mCurPos(0), mArrPos(0), mMode(MODE_NOTINITED)
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{
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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,
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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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