[plt-scheme] FFI and byte-strings

On Feb  3, Jens Axel Søgaard wrote:
> Hi all,
> 
> Is there a way to go from a byte-string to a pointer
> to the beginning of the c-array, where the actual bytes
> are stored?

A byte string can be used whenever you need a pointer:

in "x.c":

  int foo(char *a) {
    return a[0]+a[1]+a[2];
  }

And in mzscheme:

  > ((get-ffi-obj 'foo "x.so" (_fun _pointer -> _int)) #"\1\2\3")
  6

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          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
                  http://www.barzilay.org/                 Maze is Life!