Find out yourself


poke the commercial implementation for details
isn't that illegal?
not where I live..
better don't spend too much time in .us 

the EU Directive on Software Copyright Protection sais

The authorization of the rightholder shall not be required where reproduction
of the code and translation of its form within the meaning of Article 4 (a) and
(b) are indispensable to obtain the information necessary to achieve the
interoperability of an independently created computer program with other programs,
provided that the following conditions are met:...