Re: [Quickfix-developers] Field with embedded null character

[Caleb E. <cal...@gm...>]

On Wed, 27 Oct 2004 21:23:04 -0400, Yihu Fang <yih...@re...> wrote:
> However, in QuickFIX message constructor, it takes string as the parameter.
> It will throw an invalid message exception because it thinks the string is
> truncated at the null character and cannot find the Tag 10. 

Make sure you construct the string you pass to the Message constructor
properly.  The std::string constructor can take a const char* with or
without a length.  If you don't pass the length, it'll stop at the
first embedded \0 and you'll end up with a truncated message.

That said, it does seem that QuickFIX has a bug in the message
serialization code when dealing with fields having embedded \0 bytes:

#include <quickfix/Message.h>
#include <iostream>

using namespace FIX; using namespace std;

int main () {
  Message m;
  m.setField (1000, string ("one\0", 4));
  cout << m.toString () << endl;
  cout << m.getField (1000) << endl;
}

Gives the output (where ^A = ASCII SOH and \0 is an ASCII NULL)

9=10^A1000= one^A10=057^A
one\0

Note extra space and lack of \0 for serialized message form.

-- 
Caleb Epstein
cal...@gm...