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

[Felix]

From: Santosh Rajan <address@hidden>
Subject: [Chicken-users] How to convert c-pointer to nonnull-c-string
Date: Sat, 2 Jul 2011 15:08:33 +0530

> 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))


cheers,
felix