Mr. Popkov,
 
>  http://www.primechoice.com/hum/uspn.c

        Thanks!  Since I don't read C, I'll just have to compile it as a
function and try it out.  To repay you, I'll write the function (in
PL/PGSQL) to strip out any extraneous characters that the user might
have added in data entry.

        Soon.

                                        -Josh

P.S. this makes you the first outside contributor to my open-source
project ... which isn't up on the web yet!

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