LCOV - code coverage report
Current view: directory - netwerk/base/src - nsSerializationHelper.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 36 9 25.0 %
Date: 2012-06-02 Functions: 7 1 14.3 %

       1                 : /* ***** BEGIN LICENSE BLOCK *****
       2                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       3                 :  *
       4                 :  * The contents of this file are subject to the Mozilla Public License Version
       5                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       6                 :  * the License. You may obtain a copy of the License at
       7                 :  * http://www.mozilla.org/MPL/
       8                 :  *
       9                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      10                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      11                 :  * for the specific language governing rights and limitations under the
      12                 :  * License.
      13                 :  *
      14                 :  * The Original Code is mozilla.org networking code.
      15                 :  *
      16                 :  * The Initial Developer of the Original Code is
      17                 :  * Google Inc.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2007
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   Christian Biesinger <cbiesinger@web.de> (Initial author)
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "nsSerializationHelper.h"
      39                 : 
      40                 : #include "plbase64.h"
      41                 : #include "prmem.h"
      42                 : 
      43                 : #include "nsISerializable.h"
      44                 : #include "nsIObjectOutputStream.h"
      45                 : #include "nsIObjectInputStream.h"
      46                 : #include "nsString.h"
      47                 : #include "nsBase64Encoder.h"
      48                 : #include "nsAutoPtr.h"
      49                 : #include "nsComponentManagerUtils.h"
      50                 : #include "nsStringStream.h"
      51                 : 
      52                 : nsresult
      53               4 : NS_SerializeToString(nsISerializable* obj, nsCSubstring& str)
      54                 : {
      55               8 :   nsRefPtr<nsBase64Encoder> stream(new nsBase64Encoder());
      56               4 :   if (!stream)
      57               0 :     return NS_ERROR_OUT_OF_MEMORY;
      58                 : 
      59                 :   nsCOMPtr<nsIObjectOutputStream> objstream =
      60               8 :       do_CreateInstance("@mozilla.org/binaryoutputstream;1");
      61               4 :   if (!objstream)
      62               0 :     return NS_ERROR_OUT_OF_MEMORY;
      63                 : 
      64               4 :   objstream->SetOutputStream(stream);
      65                 :   nsresult rv =
      66               4 :       objstream->WriteCompoundObject(obj, NS_GET_IID(nsISupports), true);
      67               4 :   NS_ENSURE_SUCCESS(rv, rv);
      68               4 :   return stream->Finish(str);
      69                 : }
      70                 : 
      71                 : nsresult
      72               0 : NS_DeserializeObject(const nsCSubstring& str, nsISupports** obj)
      73                 : {
      74                 :   // Base64 maps 3 binary bytes -> 4 ASCII bytes.  If the original byte array
      75                 :   // does not have length 0 mod 3, the input is padded with zeros and the
      76                 :   // output is padded with a corresponding number of trailing '=' (which are
      77                 :   // then sometimes dropped).  To compute the correct length of the original
      78                 :   // byte array, we have to subtract the number of trailing '=' and then
      79                 :   // multiply by 3 and then divide by 4 (making sure this is an integer
      80                 :   // division).
      81                 : 
      82               0 :   PRUint32 size = str.Length();
      83               0 :   if (size > 0 && str[size-1] == '=') {
      84               0 :     if (size > 1 && str[size-2] == '=') {
      85               0 :       size -= 2;
      86                 :     } else {
      87               0 :       size -= 1;
      88                 :     }
      89                 :   }
      90               0 :   size = (size * 3) / 4;
      91               0 :   char* buf = PL_Base64Decode(str.BeginReading(), str.Length(), nsnull);
      92               0 :   if (!buf)
      93               0 :     return NS_ERROR_OUT_OF_MEMORY;
      94               0 :   nsCOMPtr<nsIInputStream> stream;
      95               0 :   nsresult rv = NS_NewCStringInputStream(getter_AddRefs(stream),
      96               0 :                                          Substring(buf, size));
      97               0 :   PR_Free(buf);
      98               0 :   NS_ENSURE_SUCCESS(rv, rv);
      99                 : 
     100                 :   nsCOMPtr<nsIObjectInputStream> objstream =
     101               0 :       do_CreateInstance("@mozilla.org/binaryinputstream;1");
     102               0 :   if (!objstream)
     103               0 :     return NS_ERROR_OUT_OF_MEMORY;
     104                 : 
     105               0 :   objstream->SetInputStream(stream);
     106               0 :   return objstream->ReadObject(true, obj);
     107                 : }
     108                 : 
     109               0 : NS_IMPL_ISUPPORTS1(nsSerializationHelper, nsISerializationHelper)
     110                 : 
     111                 : NS_IMETHODIMP
     112               0 : nsSerializationHelper::SerializeToString(nsISerializable *serializable,
     113                 :                                          nsACString & _retval NS_OUTPARAM)
     114                 : {
     115               0 :   return NS_SerializeToString(serializable, _retval);
     116                 : }
     117                 : 
     118                 : NS_IMETHODIMP
     119               0 : nsSerializationHelper::DeserializeObject(const nsACString & input,
     120                 :                                          nsISupports **_retval NS_OUTPARAM)
     121                 : {
     122               0 :   return NS_DeserializeObject(input, _retval);
     123                 : }

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