--- /dev/null
+;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10; Package: UFFI -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name: aggregates.cl
+;;;; Purpose: UFFI source to handle aggregate types
+;;;; Programmers: Kevin M. Rosenberg and John DeSoi
+;;;; Date Started: Feb 2002
+;;;;
+;;;; $Id: aggregates.cl,v 1.1 2002/08/02 14:39:12 kevin Exp $
+;;;;
+;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
+;;;; and John DeSoi
+;;;;
+;;;; UFFI users are granted the rights to distribute and use this software
+;;;; as governed by the terms of the Lisp Lesser GNU Public License
+;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
+;;;; *************************************************************************
+
+(declaim (optimize (debug 3) (speed 3) (safety 1) (compilation-speed 0)))
+(in-package :uffi)
+
+
+
+(defmacro def-enum (enum-name args &key (separator-string "#"))
+ "Creates a constants for a C type enum list, symbols are created
+in the created in the current package. The symbol is the concatenation
+of the enum-name name, separator-string, and field-name"
+ (let ((counter 0)
+ (cmds nil)
+ (constants nil))
+ (declare (fixnum counter))
+ (dolist (arg args)
+ (let ((name (if (listp arg) (car arg) arg))
+ (value (if (listp arg)
+ (prog1
+ (setq counter (cadr arg))
+ (incf counter))
+ (prog1
+ counter
+ (incf counter)))))
+ (setq name (intern (concatenate 'string
+ (symbol-name enum-name)
+ separator-string
+ (symbol-name name))))
+ (push `(uffi:def-constant ,name ,value) constants)))
+ (setf cmds (append '(progn)
+ #+allegro `((ff:def-foreign-type ,enum-name :int))
+ #+lispworks `((fli:define-c-typedef ,enum-name :int))
+ #+cmu `((alien:def-alien-type ,enum-name alien:signed))
+ #+mcl `((def-mcl-type ,enum-name :integer))
+ (nreverse constants)))
+ cmds))
+
+
+
+(defmacro def-array-pointer (name-array type)
+ `(def-mcl-type ,name-array '(:array ,type)))
+
+
+; this is how rref expands array slot access (minus adding the struct offset)
+(defmacro deref-array (obj type i)
+ "Returns a field from a row"
+ `(,(accessor-symbol type :get) ,obj (* (the fixnum ,i) ,(foreign-object-size type))))
+
+(defmacro deref-array-set (obj type i value)
+ `(,(accessor-symbol type :set) ,obj ,value (* (the fixnum ,i) ,(foreign-object-size type))))
+
+(defsetf deref-array deref-array-set)
+
+
+(defun process-struct-fields (name fields variant)
+ (let (processed)
+ (dolist (field fields)
+ (let* ((field-name (car field))
+ (type (cadr field))
+ (def (append (list field-name)
+ (if (eq type :pointer-self)
+ #+cmu `((* (alien:struct ,name)))
+ #-cmu `((* ,name))
+ `(,(convert-from-uffi-type type :struct))))))
+ (if variant
+ (push (list def) processed)
+ (push def processed))))
+ (nreverse processed)))
+
+
+(defmacro def-struct (name &rest fields)
+ `(ccl:defrecord ,name ,@(process-struct-fields name fields nil)))
+
+
+(defmacro def-union (name &rest fields)
+ `(ccl:defrecord ,name (:variant ,@(process-struct-fields name fields t))))
+
+
+; Assuming everything is pointer based - no support for Mac handles
+(defmacro get-slot-value (obj type slot) ;use setf to set values
+ `(ccl:pref ,obj ,(read-from-string (format nil "~a.~a" type slot))))
+
+
+(defmacro get-slot-pointer (obj type slot)
+ `(ccl:%int-to-ptr (+ (ccl:%ptr-to-int ,obj) (the fixnum (ccl:field-info ,type ,slot)))))
+
+
+
+#| a few simple tests
+(def-union union
+ (l1 :long)
+ (s1 :short))
+
+(def-struct struct
+ (s1 :short)
+ (l1 :long)
+ (u1 :union))
+
+(defvar s (allocate-foreign-object :struct))
+(setf (get-slot-value s :struct :s1) 3)
+(get-slot-value s :struct :s1)
+(setf (get-slot-value s :struct :u1.s1) 5)
+(get-slot-value s :struct :u1.s1)
+
+|#
\ No newline at end of file