Re: [Chicken-users] How to convert c-pointer to nonnull-c-string

[Santosh Rajan]

> I have a c-pointer to a C buf and buf length. Buffer sizes may be large so I
> cant use the stack. I pass a c-pointer and int length from C to the
> callback.

If the string is zero-terminated, you can use

 (##sys#peek-c-string POINTER 0)

If it isn't or may contain zeros, then try this:

(use lolevel)

(define (extract-string ptr len)
 (let ((buf (make-string len)))
   (move-memory! ptr buf len)
   buf))

Thanks move-memory! was what I needed.

“The young man knows the rules but the old man knows the exceptions”. Oliver Wendell Holmes