-;;;; -*- Mode: ANSI-Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Feb 2002
;;;;
-;;;; $Id: objects.cl,v 1.7 2002/03/18 02:27:28 kevin Exp $
+;;;; $Id: objects.cl,v 1.14 2002/03/22 20:51:08 kevin Exp $
;;;;
;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
(declaim (optimize (debug 3) (speed 3) (safety 1) (compilation-speed 0)))
(in-package :uffi)
-(defmacro allocate-foreign-object (type)
- #+cmu
- `(alien:make-alien ,(convert-from-uffi-type type :allocation))
- #+lispworks
- `(fli:allocate-foreign-object :type ',(convert-from-uffi-type type :allocate))
- #+allegro
- `(ff:allocate-fobject ',(convert-from-uffi-type type :allocate) :c)
- )
+(defmacro allocate-foreign-object (type &optional (size :unspecified))
+ "Allocates an instance of TYPE. If size is specified, then allocate
+an array of TYPE with size SIZE."
+ (if (eq size :unspecified)
+ (progn
+ #+cmu
+ `(alien:make-alien ,(convert-from-uffi-type type :allocation))
+ #+lispworks
+ `(fli:allocate-foreign-object :type ',(convert-from-uffi-type type :allocate))
+ #+allegro
+ `(ff:allocate-fobject ',(convert-from-uffi-type type :allocate) :c))
+ (progn
+ #+cmu
+ `(alien:make-alien ,(convert-from-uffi-type type :allocation) ,size)
+ #+lispworks
+ `(fli:allocate-foreign-object :type ',(convert-from-uffi-type type :allocate) :nelems ,size)
+ #+allegro
+ `(ff:allocate-fobject '(:array ,(convert-from-uffi-type type :allocate) ,(eval size)) :c)
+ )
+ ))
(defmacro free-foreign-object (obj)
#+cmu
#+lispworks `(fli:make-pointer :address 0 :type ,type)
)
+(defmacro char-array-to-pointer (obj)
+ #+cmu `(alien:cast ,obj (* (alien:unsigned 8)))
+ #+lispworks `(fli:make-pointer :type '(:unsigned :char)
+ :address (fli:pointer-address ,obj))
+ #+allegro obj
+ )
+
(defmacro deref-pointer (ptr type)
"Returns a object pointed"
- (let ((result (gensym)))
- `(let ((,result
- #+cmu (alien:deref ,ptr)
- #+lispworks (fli:dereference ,ptr)
- #+allegro (ff:fslot-value-typed ,type :c ,ptr)
- ))
- (if (and
- (or (eq ,type :char)
- (eq ,type :unsigned-char))
- (numberp ,result))
- (code-char ,result)
- ,result))))
+ #+(or cmu lispworks) (declare (ignore type))
+ #+cmu `(alien:deref ,ptr)
+ #+lispworks `(fli:dereference ,ptr)
+ #+allegro `(ff:fslot-value-typed ,type :c ,ptr)
+)
+
+#+lispworks ;; with LW, deref is a character
+(defmacro ensure-char-character (obj)
+ obj
+ )
+
+#+(or allegro cmu)
+(defmacro ensure-char-character (obj)
+ `(code-char ,obj)
+ )
+
+#+lispworks
+(defmacro ensure-char-integer (obj)
+ `(char-code ,obj))
+
+#+(or allegro cmu)
+(defmacro ensure-char-integer (obj)
+ obj
+ ) ;; (* :char) dereference is already an integer
(defmacro pointer-address (obj)
#+cmu
obj
)
-(defmacro allocate-byte-array (nsize)
+(defmacro with-foreign-object ((var type) &rest body)
+ #-(or cmu lispworks) ; default version
+ `(let ((,var (allocate-foreign-object ,type)))
+ (unwind-protect
+ (progn ,@body)
+ (free-foreign-object ,var)))
#+cmu
- `(alien:make-alien (alien:unsigned 8) ,nsize)
+ (let ((obj (gensym)))
+ `(alien:with-alien ((,obj ,(convert-from-uffi-type type :allocate)))
+ (let ((,var (alien:addr ,obj)))
+ ,@body)))
#+lispworks
- `(fli:allocate-foreign-object :type :byte :nelems ,nsize)
- #+allegro
- `(ff:allocate-fobject (array :byte ,nsize))
-)
-
-(defmacro deref-byte-array (array position)
- #+cmu `(alien:deref ,array ,position)
- #+lispworks `(fli:dereference ,array :index ,position)
- #+allegro `(ff:fslot-value-typed '(:array :byte) :c ,array ,position)
-)
-
+ `(fli:with-dynamic-foreign-objects ((,var ,(convert-from-uffi-type
+ type :allocate)))
+ ,@body)
+ )
+(defmacro with-foreign-objects (bindings &rest body)
+ (if bindings
+ `(with-foreign-object ,(car bindings)
+ (with-foreign-objects ,(cdr bindings)
+ ,@body))
+ `(progn ,@body)))
-)
+
+