-;;;; -*- Mode: ANSI-Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10; Package: UFFI -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Feb 2002
;;;;
-;;;; $Id: strings.cl,v 1.8 2002/03/19 16:42:59 kevin Exp $
+;;;; $Id: strings.cl,v 1.17 2002/04/06 19:53:08 kevin Exp $
;;;;
;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
(defmacro convert-from-cstring (obj)
"Converts a string from a c-call. Same as convert-from-foreign-string, except
-that CMU automatically converts strings from c-calls."
+that LW/CMU automatically converts strings from c-calls."
#+cmu obj
- #+lispworks
- (let ((stored (gensym)))
- `(let ((,stored ,obj))
- (if (fli:null-pointer-p ,stored)
- nil
- (fli:convert-from-foreign-string ,stored))))
+ #+lispworks obj
#+allegro
(let ((stored (gensym)))
`(let ((,stored ,obj))
)
(defmacro convert-to-cstring (obj)
- #+lispworks
- `(if (null ,obj)
- +null-cstring-pointer+
- (fli:convert-to-foreign-string ,obj))
+ #+cmu obj
+ #+lispworks obj
#+allegro
`(if (null ,obj)
0
(values (excl:string-to-native ,obj)))
- #+cmu
- (declare (ignore obj))
)
(defmacro free-cstring (obj)
- #+lispworks
- `(unless (fli:null-pointer-p ,obj)
- (fli:free-foreign-object ,obj))
+ #+cmu (declare (ignore obj))
+ #+lispworks (declare (ignore obj))
#+allegro
`(unless (zerop obj)
(ff:free-fobject ,obj))
- #+cmu
- (declare (ignore obj))
)
-;; Either length or null-terminated-p must be non-nil
-(defmacro convert-from-foreign-string (obj &key
- length
- (null-terminated-p t))
- #+allegro
- `(if (zerop ,obj)
- nil
- (values (excl:native-to-string
- ,obj
- ,@(if length (list :length length) (values))
- :truncate (not ,null-terminated-p))))
- #+lispworks
- `(if (fli:null-pointer-p ,obj)
- nil
- (fli:convert-from-foreign-string
- ,obj
- ,@(if length (list :length length) (values))
- :null-terminated-p ,null-terminated-p
- :external-format '(:latin-1 :eol-style :lf)))
+(defmacro with-cstring ((cstring lisp-string) &body body)
#+cmu
- `(cmucl-naturalize-cstring (alien:alien-sap ,obj)
- :length ,length
- :null-terminated-p ,null-terminated-p)
+ `(let ((,cstring ,lisp-string)) ,@body)
+ #+lispworks
+ `(let ((,cstring ,lisp-string)) ,@body)
+ #+allegro
+ (let ((acl-native (gensym)))
+ `(excl:with-native-string (,acl-native ,lisp-string)
+ (let ((,cstring (if ,lisp-string ,acl-native 0)))
+ ,@body)))
)
+(defmacro with-cstrings (bindings &rest body)
+ (if bindings
+ `(with-cstring ,(car bindings)
+ (with-cstrings ,(cdr bindings)
+ ,@body))
+ `(progn ,@body)))
+
+;;; Foreign string functions
+
(defmacro convert-to-foreign-string (obj)
#+lispworks
`(if (null ,obj)
(let ((size (gensym))
(storage (gensym))
(i (gensym)))
- `(when (stringp ,obj)
+ `(etypecase ,obj
+ (null
+ (alien:sap-alien (system:int-sap 0) (* (alien:unsigned 8))))
+ (string
(let* ((,size (length ,obj))
(,storage (alien:make-alien (alien:unsigned 8) (1+ ,size))))
(setq ,storage (alien:cast ,storage (* (alien:unsigned 8))))
(declare (fixnum ,i))
(setf (alien:deref ,storage ,i) (char-code (char ,obj ,i))))
(setf (alien:deref ,storage ,size) 0))
- ,storage)))
+ ,storage))))
+ )
+
+
+;; Either length or null-terminated-p must be non-nil
+(defmacro convert-from-foreign-string (obj &key
+ length
+ (null-terminated-p t))
+ #+allegro
+ `(if (zerop ,obj)
+ nil
+ (values (excl:native-to-string
+ ,obj
+ ,@(if length (list :length length) (values))
+ :truncate (not ,null-terminated-p))))
+ #+lispworks
+ `(if (fli:null-pointer-p ,obj)
+ nil
+ (fli:convert-from-foreign-string
+ ,obj
+ ,@(if length (list :length length) (values))
+ :null-terminated-p ,null-terminated-p
+ :external-format '(:latin-1 :eol-style :lf)))
+ #+cmu
+ `(if (null-pointer-p ,obj)
+ nil
+ (cmucl-naturalize-cstring (alien:alien-sap ,obj)
+ :length ,length
+ :null-terminated-p ,null-terminated-p))
)
+
(defmacro allocate-foreign-string (size &key (unsigned t))
#+cmu
(let ((array-def (gensym)))
`(ff:allocate-fobject :char :c ,size)
)
-(defmacro with-cstring ((foreign-string lisp-string) &body body)
- #+cmu
- `(let ((,foreign-string ,lisp-string)) ,@body)
- #+allegro
- (let ((acl-native (gensym)))
- `(excl:with-native-string (,acl-native ,lisp-string)
- (let ((,foreign-string (if ,lisp-string ,acl-native 0)))
- ,@body)))
- #+lispworks
+(defmacro with-foreign-string ((foreign-string lisp-string) &body body)
(let ((result (gensym)))
- `(let* ((,foreign-string (convert-to-cstring ,lisp-string))
- (,result ,@body))
- (fli:free-foreign-object ,foreign-string)
- ,result))
- )
+ `(let* ((,foreign-string (convert-to-foreign-string ,lisp-string))
+ (,result (progn ,@body)))
+ (declare (dynamic-extent ,foreign-string))
+ (free-foreign-object ,foreign-string)
+ ,result)))
+
;; Modified from CMUCL's source to handle non-null terminated strings
#+cmu