Marshalling Haskell String <-> UTF-8

[George Russell]

I have implemented code to do this which I think is better than
John Meacham's, because it (a) handles all UTF8 sequences
(up to 6 bytes); (b) checks for errors as UTF8 decoders are
supposed to do; (c) lets you determine if there is an error
without having to seq the entire list.  Here is a link:

    http://www.haskell.org//pipermail/glasgow-haskell-users/2004-April/006564.html