istream::get(char*, int) problem

[Graphic]

First please don't waste your time and my time by telling me to store my images on disk instead of a database. There are advantages to both and in this case it is much easier to manage these images and their classification by using a database to store all the data (I'm not storing many large images anyway, just 4 or 5 small jpegs that get updated now and then).

Problem:
Now I need to know if I'm using istream::get(char*, int) in a naive way or if there is probably some inherit bug in sql::ResultSet::getBlob(string) that I should report. What I mean in a "naive way" is that is there no guarantee that I wont hit the 'delim' char in the middle of my stream if I'm reading in data that is representing a jpeg? Do I need to use the istream::get(char*,int,char) where the last char is the 'delim'? I played around with this code for awhile before finally finding that sql::ResultSet::getString(string) and converting it to a c string worked for my purposes.

  //Notes: result is a result set from a MySQL api (MySQL C++/Connector)
  //           "Master" is a jpeg stored as a longblob in a MySQL database
  //           "MasterSize" is the jpeg's size in bytes stored as an int in a MySQL database

  ///////////////////////////////////////////////////////////////////////////
  //Code that does not work:  buffer does not have the
  //data in it
  int size = result->getInt("MasterSize")/sizeof(char);
  char* buffer = new char[size];
  
  //Note: sql::ResultSet::getBlob(string) returns an istream
  (result->getBlob("Master"))->get(buffer,size);
  ///////////////////////////////////////////////////////////////////////////
  
  ///////////////////////////////////////////////////////////////////////////
  //Code that does work
  int size = result->getInt("MasterSize")/sizeof(char);
  //Note: sql::ResultSet::getString(string) returns a std::string
  char* buffer = (result->getString("Master")).c_str();
  
  //I can then traverse buffer using size just fine and save
  //this buffer to a file to get back my jpeg.  
  ///////////////////////////////////////////////////////////////////////////

[Lindley]

If you don't want any delimiter to be a meaningful place to stop reading, then you should be using istream::read() rather than istream::get().

[Graphic]

Thank you! That was it, I'm guessing it was hitting a delim character when I was using get, but using read worked great. Sorry I'm still really new at C++.