gecko-dev/modules/libjar/nsXPTZipLoader.cpp

124 lines
3.8 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 the XPT zip reader.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* John Bandhauer <jband@netscape.com>
* Alec Flett <alecf@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 "nsXPTZipLoader.h"
#include "nsIZipReader.h"
#include "nsXPIDLString.h"
#include "nsString.h"
#include "nsStringEnumerator.h"
static const char gCacheContractID[] =
"@mozilla.org/libjar/zip-reader-cache;1";
static const PRUint32 gCacheSize = 1;
nsXPTZipLoader::nsXPTZipLoader() {
}
NS_IMPL_ISUPPORTS1(nsXPTZipLoader, nsIXPTLoader)
nsresult
nsXPTZipLoader::LoadEntry(nsILocalFile* aFile,
const char* aName,
nsIInputStream** aResult)
{
nsCOMPtr<nsIZipReader> zip = dont_AddRef(GetZipReader(aFile));
if (!zip)
return NS_OK;
return zip->GetInputStream(aName, aResult);
}
nsresult
nsXPTZipLoader::EnumerateEntries(nsILocalFile* aFile,
nsIXPTLoaderSink* aSink)
{
nsCOMPtr<nsIZipReader> zip = dont_AddRef(GetZipReader(aFile));
if (!zip) {
NS_WARNING("Could not get Zip Reader");
return NS_OK;
}
nsCOMPtr<nsIUTF8StringEnumerator> entries;
if (NS_FAILED(zip->FindEntries("*.xpt", getter_AddRefs(entries))) ||
!entries) {
// no problem, just no .xpt files in this archive
return NS_OK;
}
PRBool hasMore;
int index = 0;
while (NS_SUCCEEDED(entries->HasMore(&hasMore)) && hasMore) {
nsCAutoString itemName;
if (NS_FAILED(entries->GetNext(itemName)))
return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIInputStream> stream;
if (NS_FAILED(zip->GetInputStream(itemName.get(), getter_AddRefs(stream))))
return NS_ERROR_FAILURE;
// ignore the result
aSink->FoundEntry(itemName.get(), index++, stream);
}
return NS_OK;
}
nsIZipReader*
nsXPTZipLoader::GetZipReader(nsILocalFile* file)
{
NS_ASSERTION(file, "bad file");
if(!mCache)
{
mCache = do_CreateInstance(gCacheContractID);
if(!mCache || NS_FAILED(mCache->Init(gCacheSize)))
return nsnull;
}
nsIZipReader* reader = nsnull;
if(NS_FAILED(mCache->GetZip(file, &reader)))
return nsnull;
return reader;
}