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0527238c0a
instead of allocating all the data into one big buffer, keep a small input buffer around and decompress directly into a client's read buffer.. r=dougt, sr=darin
114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* nsJARInputStream.cpp
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Netscape Communicator source code.
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Mitch Stoltz <mstoltz@netscape.com>
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*/
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#include "nsJARInputStream.h"
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#include "zipfile.h" // defines ZIP error codes
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#include "nsZipArchive.h"
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/*---------------------------------------------
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* nsISupports implementation
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*--------------------------------------------*/
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NS_IMPL_THREADSAFE_ISUPPORTS1(nsJARInputStream, nsIInputStream);
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/*----------------------------------------------------------
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* nsJARInputStream implementation
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*--------------------------------------------------------*/
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NS_IMETHODIMP
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nsJARInputStream::Available(PRUint32 *_retval)
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{
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*_retval = mReadInfo.Available();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsJARInputStream::Read(char* buf, PRUint32 count, PRUint32 *bytesRead)
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{
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if (!mJAR)
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return NS_BASE_STREAM_CLOSED;
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PRInt32 err = mReadInfo.Read(buf, count, bytesRead);
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return err == ZIP_OK ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsJARInputStream::ReadSegments(nsWriteSegmentFun writer, void * closure, PRUint32 count, PRUint32 *_retval)
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{
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// don't have a buffer to read from, so this better not be called!
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NS_NOTREACHED("Consumers should be using Read()!");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsJARInputStream::IsNonBlocking(PRBool *aNonBlocking)
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{
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*aNonBlocking = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsJARInputStream::Close()
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{
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NS_IF_RELEASE(mJAR);
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return NS_OK;
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}
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nsresult
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nsJARInputStream::Init(nsJAR* aJAR, const char* aFilename)
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{
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if (!aFilename)
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return NS_ERROR_NULL_POINTER;
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mJAR = aJAR;
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NS_ADDREF(mJAR);
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PRInt32 result;
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PRFileDesc* fd = aJAR->OpenFile();
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NS_ASSERTION(fd, "Couldn't open JAR!");
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if (!fd)
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return NS_ERROR_UNEXPECTED;
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result = aJAR->mZip.ReadInit(aFilename, &mReadInfo, fd);
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if (result != ZIP_OK)
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return NS_ERROR_FAILURE;
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return NS_OK;
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}
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//----------------------------------------------
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// nsJARInputStream constructor and destructor
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//----------------------------------------------
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nsJARInputStream::nsJARInputStream()
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: mJAR(nsnull)
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{
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}
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nsJARInputStream::~nsJARInputStream()
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{
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Close();
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}
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