gecko/modules/libjar/nsJARInputStream.h

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/* nsJARInputStream.h
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Netscape Communicator source code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mitch Stoltz <mstoltz@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsJARINPUTSTREAM_h__
#define nsJARINPUTSTREAM_h__
#include "nsIInputStream.h"
#include "nsJAR.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 : public nsIInputStream
{
public:
nsJARInputStream() :
mFd(nsnull), mInSize(0), mCurPos(0),
mClosed(PR_FALSE), mInflate(nsnull), mDirectory(0) { }
~nsJARInputStream() { Close(); }
NS_DECL_ISUPPORTS
NS_DECL_NSIINPUTSTREAM
// takes ownership of |fd|, even on failure
nsresult InitFile(nsZipArchive* aZip, nsZipItem *item, PRFileDesc *fd);
nsresult InitDirectory(nsZipArchive* aZip,
const nsACString& aJarDirSpec,
const char* aDir);
private:
PRFileDesc* mFd; // My own file handle, for reading
PRUint32 mInSize; // Size in original file
PRUint32 mCurPos; // Current position in input
struct InflateStruct {
PRUint32 mOutSize; // inflated size
PRUint32 mInCrc; // CRC as provided by the zipentry
PRUint32 mOutCrc; // CRC as calculated by me
z_stream mZs; // zip data structure
unsigned char mReadBuf[ZIP_BUFLEN]; // Readbuffer to inflate from
};
struct InflateStruct * mInflate;
/* For directory reading */
nsZipArchive* mZip; // the zipReader
PRUint32 mNameLen; // length of dirname
nsCAutoString mBuffer; // storage for generated text of stream
PRUint32 mArrPos; // current position within mArray
nsCStringArray mArray; // array of names in (zip) directory
PRPackedBool mDirectory;
PRPackedBool mClosed; // Whether the stream is closed
nsresult ContinueInflate(char* aBuf, PRUint32 aCount, PRUint32* aBytesRead);
nsresult ReadDirectory(char* aBuf, PRUint32 aCount, PRUint32* aBytesRead);
PRUint32 CopyDataToBuffer(char* &aBuffer, PRUint32 &aCount);
};
#endif /* nsJARINPUTSTREAM_h__ */