How to make a Currency class from std.BigInt?

[Jay Norwood via Digitalmars-d-learn]

This library allow to specify the internal base of the arbitrary 
precision numbers( default is decimal), as well as allows 
specification of the precision of floating point values.  Each 
floating point number precision can be read with .precision().  
Also supports specification of rounding modes.  Seems like it 
would be a nice project for a port to D.

http://www.hvks.com/Numerical/arbitrary_precision.html