;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Feb 2002
;;;;
-;;;; $Id: strings.lisp,v 1.1 2002/09/30 10:02:36 kevin Exp $
+;;;; $Id: strings.lisp,v 1.7 2003/03/28 19:58:18 kevin Exp $
;;;;
;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
(defvar +null-cstring-pointer+
- #+cmu 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
- #+lispworks obj
+ #+(or cmu sbcl lispworks scl) obj
#+allegro
(let ((stored (gensym)))
`(let ((,stored ,obj))
)
(defmacro convert-to-cstring (obj)
- #+cmu obj
- #+lispworks obj
+ #+(or cmu sbcl scl lispworks) obj
#+allegro
`(if (null ,obj)
0
`(if (null ,obj)
+null-cstring-pointer+
(let ((ptr (new-ptr (1+ (length ,obj)))))
- (ccl:%put-cstring ptr ,obj)
+ (ccl::%put-cstring ptr ,obj)
ptr))
)
(defmacro free-cstring (obj)
- #+cmu (declare (ignore obj))
- #+lispworks (declare (ignore obj))
+ #+(or cmu sbcl scl lispworks) (declare (ignore obj))
#+allegro
- `(unless (zerop obj)
+ `(unless (zerop ,obj)
(ff:free-fobject ,obj))
#+mcl
`(unless (ccl:%null-ptr-p ,obj)
)
(defmacro with-cstring ((cstring lisp-string) &body body)
- #+cmu
- `(let ((,cstring ,lisp-string)) ,@body)
- #+lispworks
+ #+(or cmu sbcl scl lispworks)
`(let ((,cstring ,lisp-string)) ,@body)
#+allegro
(let ((acl-native (gensym)))
(defmacro convert-to-foreign-string (obj)
#+lispworks
`(if (null ,obj)
- +null-cstring-pointer+
- (fli:convert-to-foreign-string ,obj))
+ +null-cstring-pointer+
+ (fli:convert-to-foreign-string ,obj :external-format '(:latin-1 :eol-style :lf)))
#+allegro
`(if (null ,obj)
0
(values (excl:string-to-native ,obj)))
- #+cmu
+ #+(or cmu scl)
(let ((size (gensym))
(storage (gensym))
(i (gensym)))
(setf (alien:deref ,storage ,i) (char-code (char ,obj ,i))))
(setf (alien:deref ,storage ,size) 0))
,storage))))
+ #+sbcl
+ (let ((size (gensym))
+ (storage (gensym))
+ (i (gensym)))
+ `(etypecase ,obj
+ (null
+ (sb-alien:sap-alien (sb-sys:int-sap 0) (* (sb-alien:unsigned 8))))
+ (string
+ (let* ((,size (length ,obj))
+ (,storage (sb-alien:make-alien (sb-alien:unsigned 8) (1+ ,size))))
+ (setq ,storage (sb-alien:cast ,storage (* (sb-alien:unsigned 8))))
+ (locally
+ (declare (optimize (speed 3) (safety 0)))
+ (dotimes (,i ,size)
+ (declare (fixnum ,i))
+ (setf (sb-alien:deref ,storage ,i) (char-code (char ,obj ,i))))
+ (setf (sb-alien:deref ,storage ,size) 0))
+ ,storage))))
#+mcl
`(if (null ,obj)
+null-cstring-pointer+
(let ((ptr (new-ptr (1+ (length ,obj)))))
- (ccl:%put-cstring ptr ,obj)
+ (ccl::%put-cstring ptr ,obj)
ptr))
)
,@(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)
:length ,length
:null-terminated-p ,null-terminated-p))
+ #+sbcl
+ `(if (null-pointer-p ,obj)
+ nil
+ (sbcl-naturalize-cstring (sb-alien:alien-sap ,obj)
+ :length ,length
+ :null-terminated-p ,null-terminated-p))
#+mcl
(declare (ignore null-terminated-p))
#+mcl
(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)
,(if ,unsigned
'(* (alien:unsigned 8))
'(* (alien:signed 8)))))))
+ #+sbcl
+ (let ((array-def (gensym)))
+ `(let ((,array-def (list 'sb-alien:array 'char ,size)))
+ (eval `(sb-alien:cast (sb-alien:make-alien ,,array-def)
+ ,(if ,unsigned
+ '(* (sb-alien:unsigned 8))
+ '(* (sb-alien:signed 8)))))))
#+lispworks
`(fli:allocate-foreign-object :type
,(if unsigned
;; Modified from CMUCL's source to handle non-null terminated strings
#+cmu
-(defun cmucl-naturalize-cstring (sap &key
- length
- (null-terminated-p t))
+(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)))
vm:word-bits)
(* 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))
+ (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 (sb-sys: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)))
+ (sb-kernel:copy-from-system-area sap 0
+ result (* sb-vm:vector-data-offset
+ sb-vm:n-word-bits)
+ (* length sb-vm:n-byte-bits))
+ result)))