;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Feb 2002
;;;;
-;;;; $Id: strings.lisp,v 1.3 2002/10/14 03:07:41 kevin Exp $
+;;;; $Id: strings.lisp,v 1.4 2002/10/16 11:56:43 kevin Exp $
;;;;
;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
(defvar +null-cstring-pointer+
- #+cmu nil
- #+sbcl nil
+ #+(or cmu sbcl scl) nil
#+allegro 0
#+lispworks (fli:make-pointer :address 0 :type '(:unsigned :char))
#+mcl (ccl:%null-ptr)
- #-(or cmu allegro lispworks mcl) nil
)
(defmacro convert-from-cstring (obj)
"Converts a string from a c-call. Same as convert-from-foreign-string, except
that LW/CMU automatically converts strings from c-calls."
- #+cmu obj
- #+sbcl obj
- #+lispworks obj
+ #+(or cmu sbcl lispworks scl) obj
#+allegro
(let ((stored (gensym)))
`(let ((,stored ,obj))
)
(defmacro convert-to-cstring (obj)
- #+cmu obj
- #+sbcl obj
- #+lispworks obj
+ #+(or cmu sbcl scl lispworks) obj
#+allegro
`(if (null ,obj)
0
)
(defmacro free-cstring (obj)
- #+(or cmu sbcl lispworks) (declare (ignore obj))
+ #+(or cmu sbcl scl lispworks) (declare (ignore obj))
#+allegro
`(unless (zerop obj)
(ff:free-fobject ,obj))
)
(defmacro with-cstring ((cstring lisp-string) &body body)
- #+(or cmu sbcl lispworks)
+ #+(or cmu sbcl scl lispworks)
`(let ((,cstring ,lisp-string)) ,@body)
#+allegro
(let ((acl-native (gensym)))
`(if (null ,obj)
0
(values (excl:string-to-native ,obj)))
- #+cmu
+ #+(or cmu scl)
(let ((size (gensym))
(storage (gensym))
(i (gensym)))
,@(if length (list :length length) (values))
:null-terminated-p ,null-terminated-p
:external-format '(:latin-1 :eol-style :lf)))
- #+cmu
+ #+(or cmu scl)
`(if (null-pointer-p ,obj)
nil
(cmucl-naturalize-cstring (alien:alien-sap ,obj)
(defmacro allocate-foreign-string (size &key (unsigned t))
- #+cmu
+ #+(or cmu scl)
(let ((array-def (gensym)))
`(let ((,array-def (list 'alien:array 'c-call:char ,size)))
(eval `(alien:cast (alien:make-alien ,,array-def)
(* length vm:byte-bits))
result)))
+#+scl
+;; kernel:copy-from-system-area doesn't work like it does on CMUCL or SBCL,
+;; so have to iteratively copy from sap
+(defun cmucl-naturalize-cstring (sap &key length (null-terminated-p t))
+ (declare (type system:system-area-pointer sap))
+ (locally
+ (declare (optimize (speed 3) (safety 0)))
+ (let ((null-terminated-length
+ (when null-terminated-p
+ (loop
+ for offset of-type fixnum upfrom 0
+ until (zerop (system:sap-ref-8 sap offset))
+ finally (return offset)))))
+ (if length
+ (if (and null-terminated-length
+ (> (the fixnum length) (the fixnum null-terminated-length)))
+ (setq length null-terminated-length))
+ (setq length null-terminated-length)))
+ (let ((result (make-string length)))
+ (dotimes (i length)
+ (declare (type fixnum i))
+ (setf (char result i) (code-char (system:sap-ref-8 sap i))))
+ result)))
+
#+sbcl
(defun sbcl-naturalize-cstring (sap &key length (null-terminated-p t))
(declare (type sb-sys:system-area-pointer sap))