Re: [Boost-users] [Serialize] Problem creatingboost::archive::text_iarchive

Subject: Re: [Boost-users] [Serialize] Problem creatingboost::archive::text_iarchive
From: Robert Ramey (ramey_at_[hidden])
Date: 2009-02-16 11:58:36

One thing odd about your example is opening the text archive stream with "ios::binary". Do you know for a fact that the archive was created this way?

Robert Ramey
  "Javier Sanz" <jsanz_at_[hidden]> wrote in message news:119b5fdf0902160414l5211789ci86085b2dab71d7cd_at_mail.gmail.com...
  Hello,

  I'm getting problems creating a boost::archive::text_iarchive with boosts version 1.35.0 and Visual C++ Studio 2005 (Version 8). When I do so I get a std::bad_alloc exception. The code is as follows:

  void Serialize::deserialize(std::
  ifstream &modelFile,
                              CoreModel &c)
  {
      try
      {
          boost::archive::text_iarchive ia(modelFile); // This line throws the exception (I've seen it with the debugger)
          ia >> c;
      }
      catch (std::exception& ex)
      {
          // I catch the bad_alloc here 
      }
  }

  And this code si called this way:

  ...

  for (...)
  {
      modelFile.open(model_name.c_str(), std::ios::binary);
      if (modelFile.is_open() == false)
      {
          // ... We deal with the error but it does not get into here 
      }

      CoreModel model;
      Serialize::deserialize(modelFile, model);

      ....
  }

  With the debugger I have seen that the exception is thrown into the method text_iarchive_impl<Archive>::load. The method basic_text_iprimitive::load is not setting the size of the string and when the string resize is done the value is huge (is garbage actually) and it throws the std::bad_alloc. 

  Digging into the mailing list I have seen a thread that explains the same problem:

  http://listarchives.boost.org/boost-users/2006/03/18032.php

  But the solution proposed there does not fit me (As far as I can see).

  /Thanks
  Francisco Javier Sanz Olviera

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