[Chicken-users] Yet another ffi...

[felix winkelmann]

A new egg providing another way to interface to foreign libraries is
available at

http://www.call-with-current-continuation.org/eggs/lazy-ffi.html

It looks like this:


~"libc.so.6" 
(~printf "%d -> %g, ok: %s\n" 123 45.67 "hello")
(~sleep 1)

~"libm.so.6"

(~sin 33.4 return: double:)    ==> 0.915809602890819
(~tolower #\A return: char:)   ==> #\a

(let* ([box (f64vector 0)]
       [r (~modf 123.456 f64vector: box return: double:)] )
  (list r box) )   ==> (0.456 #f64(123.0))


Pros: no declarations needed, handles variadic C functions.
Cons: needs libfffi/dlopen (not particularly portable), only absolutely minimal
safety checks.


cheers,
felix