mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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124 lines
4.3 KiB
C++
124 lines
4.3 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org networking code.
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*
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* The Initial Developer of the Original Code is
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* Google Inc.
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* Portions created by the Initial Developer are Copyright (C) 2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Christian Biesinger <cbiesinger@web.de> (Initial author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsSerializationHelper.h"
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#include "plbase64.h"
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#include "prmem.h"
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#include "nsISerializable.h"
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#include "nsIObjectOutputStream.h"
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#include "nsIObjectInputStream.h"
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#include "nsString.h"
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#include "nsBase64Encoder.h"
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#include "nsAutoPtr.h"
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#include "nsComponentManagerUtils.h"
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#include "nsStringStream.h"
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nsresult
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NS_SerializeToString(nsISerializable* obj, nsCSubstring& str)
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{
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nsRefPtr<nsBase64Encoder> stream(new nsBase64Encoder());
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if (!stream)
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return NS_ERROR_OUT_OF_MEMORY;
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nsCOMPtr<nsIObjectOutputStream> objstream =
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do_CreateInstance("@mozilla.org/binaryoutputstream;1");
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if (!objstream)
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return NS_ERROR_OUT_OF_MEMORY;
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objstream->SetOutputStream(stream);
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nsresult rv =
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objstream->WriteCompoundObject(obj, NS_GET_IID(nsISupports), PR_TRUE);
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NS_ENSURE_SUCCESS(rv, rv);
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return stream->Finish(str);
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}
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nsresult
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NS_DeserializeObject(const nsCSubstring& str, nsISupports** obj)
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{
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// Base64 maps 3 binary bytes -> 4 ASCII bytes. If the original byte array
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// does not have length 0 mod 3, the input is padded with zeros and the
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// output is padded with a corresponding number of trailing '=' (which are
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// then sometimes dropped). To compute the correct length of the original
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// byte array, we have to subtract the number of trailing '=' and then
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// multiply by 3 and then divide by 4 (making sure this is an integer
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// division).
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PRUint32 size = str.Length();
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if (size > 0 && str[size-1] == '=') {
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if (size > 1 && str[size-2] == '=') {
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size -= 2;
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} else {
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size -= 1;
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}
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}
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size = (size * 3) / 4;
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char* buf = PL_Base64Decode(str.BeginReading(), str.Length(), nsnull);
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if (!buf)
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return NS_ERROR_OUT_OF_MEMORY;
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nsCOMPtr<nsIInputStream> stream;
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nsresult rv = NS_NewCStringInputStream(getter_AddRefs(stream),
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Substring(buf, buf + size));
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PR_Free(buf);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIObjectInputStream> objstream =
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do_CreateInstance("@mozilla.org/binaryinputstream;1");
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if (!objstream)
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return NS_ERROR_OUT_OF_MEMORY;
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objstream->SetInputStream(stream);
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return objstream->ReadObject(PR_TRUE, obj);
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}
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NS_IMPL_ISUPPORTS1(nsSerializationHelper, nsISerializationHelper)
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NS_IMETHODIMP
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nsSerializationHelper::SerializeToString(nsISerializable *serializable,
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nsACString & _retval NS_OUTPARAM)
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{
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return NS_SerializeToString(serializable, _retval);
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}
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NS_IMETHODIMP
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nsSerializationHelper::DeserializeObject(const nsACString & input,
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nsISupports **_retval NS_OUTPARAM)
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{
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return NS_DeserializeObject(input, _retval);
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}
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