I noted in my mail that the copyright notice on page ii seems to
indicate that the source cannot just be used without explicit
permission but if he could still clarify if this also applies to
source code. The copyright notice on page ii reads:

   No part of this book may be reproduced, in any form or by any
   means, without permission in writing from the publisher.

The answer to my query from Richard was:

  The publisher does indeed hold the copyright and they want to
  approve each use of code from the book.  So I have cc'ed my editor
  at P-H and she will get back to you.

The reply from the editor was:

  You have Prentice Hall's permission to use this code snippet as long
  as you cite your source, do not use this for commercial purposes,
  and have read and understand the disclaimer in the book. The
  software is provided on as "as is" basis and without warranty of any
  kind, expressed or implied, including without limitation any
  warranty of merchantability or fitness for a particular purpose. In
  no event shall the author or Prentice Hall be liable for any
  damanges of any kind as is stated in the disclaimer.

  Please let me know if you have any questions. Good luck!

If someone needs the mail address of the said editor on P-H, please
let me now.

--
Heikki Vatiainen                  * he...@cs.tut.fi
Tampere University of Technology  * Tampere, Finland