pjs/modules/libjar/nsJARInputStream.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* nsJARInputStream.cpp
*
* ***** 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 ***** */
#include "nsJARInputStream.h"
#include "zipfile.h" // defines ZIP error codes
#include "nsZipArchive.h"
/*---------------------------------------------
* nsISupports implementation
*--------------------------------------------*/
NS_IMPL_THREADSAFE_ISUPPORTS1(nsJARInputStream, nsIInputStream)
/*----------------------------------------------------------
* nsJARInputStream implementation
*--------------------------------------------------------*/
NS_IMETHODIMP
nsJARInputStream::Available(PRUint32 *_retval)
{
if (!mJAR)
return NS_BASE_STREAM_CLOSED;
*_retval = mReadInfo.Available();
return NS_OK;
}
NS_IMETHODIMP
nsJARInputStream::Read(char* buf, PRUint32 count, PRUint32 *bytesRead)
{
if (!mJAR) {
*bytesRead = 0;
return NS_OK;
}
PRInt32 err = mReadInfo.Read(buf, count, bytesRead);
return err == ZIP_OK ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsJARInputStream::ReadSegments(nsWriteSegmentFun writer, void * closure, PRUint32 count, PRUint32 *_retval)
{
// don't have a buffer to read from, so this better not be called!
NS_NOTREACHED("Consumers should be using Read()!");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsJARInputStream::IsNonBlocking(PRBool *aNonBlocking)
{
*aNonBlocking = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsJARInputStream::Close()
{
mJAR = nsnull;
return NS_OK;
}
nsresult
nsJARInputStream::Init(nsJAR* aJAR, const char* aFilename)
{
NS_ENSURE_ARG_POINTER(aJAR);
NS_ENSURE_ARG_POINTER(aFilename);
mJAR = aJAR;
// Don't assert if !fd, because it's possible that aJAR comes
// from a cache and aJAR's file has been deled
PRFileDesc* fd = aJAR->OpenFile();
if (!fd)
return NS_ERROR_UNEXPECTED;
// mReadInfo takes ownership of fd here
PRInt32 result = aJAR->mZip.ReadInit(aFilename, &mReadInfo, fd);
if (result != ZIP_OK)
return NS_ERROR_FAILURE;
return NS_OK;
}
//----------------------------------------------
// nsJARInputStream constructor and destructor
//----------------------------------------------
nsJARInputStream::nsJARInputStream()
{
}
nsJARInputStream::~nsJARInputStream()
{
Close();
}