nsJARInputStream.h

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/* nsJARInputStream.h

 * 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 nsJARINPUTSTREAM_h__

#define nsJARINPUTSTREAM_h__

#include "nsIInputStream.h"

#include "nsJAR.h"

#include "nsTArray.h"

#include "mozilla/Attributes.h"

/*-------------------------------------------------------------------------

 * Class nsJARInputStream declaration. This class defines the type of the

 * object returned by calls to nsJAR::GetInputStream(filename) for the

 * purpose of reading a file item out of a JAR file.

 *------------------------------------------------------------------------*/

class nsJARInputStream final : public nsIInputStream {

 public:

  nsJARInputStream()

      : mOutSize(0),

        mInCrc(0),

        mOutCrc(0),

        mNameLen(0),

        mCurPos(0),

        mArrPos(0),

        mMode(MODE_NOTINITED) {

    memset(&mZs, 0, sizeof(z_stream));

  NS_DECL_THREADSAFE_ISUPPORTS

  NS_DECL_NSIINPUTSTREAM

  // takes ownership of |fd|, even on failure

  nsresult InitFile(nsZipHandle* aFd, const uint8_t* aData, nsZipItem* item);

  nsresult InitDirectory(nsJAR* aJar, const char* aDir);

 private:

  ~nsJARInputStream() { Close(); }

  RefPtr<nsZipHandle> mFd;  // handle for reading

  uint32_t mOutSize;        // inflated size

  uint32_t mInCrc;          // CRC as provided by the zipentry

  uint32_t mOutCrc;         // CRC as calculated by me

  z_stream mZs;             // zip data structure

  /* For directory reading */

  RefPtr<nsJAR> mJar;          // string reference to zipreader

  uint32_t mNameLen;           // length of dirname

  nsCString mBuffer;           // storage for generated text of stream

  uint32_t mCurPos;            // Current position in buffer

  uint32_t mArrPos;            // current position within mArray

  nsTArray<nsCString> mArray;  // array of names in (zip) directory

  typedef enum {

    MODE_NOTINITED,

    MODE_CLOSED,

    MODE_DIRECTORY,

    MODE_INFLATE,

    MODE_COPY

  } JISMode;

  JISMode mMode;  // Modus of the stream

  nsresult ContinueInflate(char* aBuf, uint32_t aCount, uint32_t* aBytesRead);

  nsresult ReadDirectory(char* aBuf, uint32_t aCount, uint32_t* aBytesRead);

  uint32_t CopyDataToBuffer(char*& aBuffer, uint32_t& aCount);

};

#endif /* nsJARINPUTSTREAM_h__ */