Footnotes

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appears in all copies.
The University of California, Berkeley Softworks, and Adam de Boor make no
representations about the suitability of this software for any
purpose. It is provided "as is" without express or implied warranty.

[1]  This is also somewhat cleaner, I think, than the dynamic source solution presented in 2.6