[UFFI-Users] string arguments that may be null

Kevin Rosenberg kevin at rosenberg.net
Mon Dec 27 15:05:49 MST 2004


John Wiseman wrote:
> What's the correct way to define a foreign function that accepts a
> string argument which can also be a null pointer?

John,

Take a look at tests/getenv.lisp. my-getenv can take an argument of
NIL, which when used with the function's with-cstrings form, does the
right thing.

-- 
Kevin Rosenberg
kevin at rosenberg.net


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